Recombinant human sHer2 produced by HEK 293 and sHer2 isolated from the supernatant of the primary tumor cell culture from breast cancer patients was used in the experiments. The oligomeric status was estimated using the method of gel-filtration chromatography and electrophoresis. The stability of Her2 was determined by the change in the protein secondary structure under variation of temperature and pH values by means of CD spectroscopy. The inhibitory activity of sHer2 was analyzed in tests with Her2-expressing cell cultures. The content of sHer2 in the supernatant of primary tumor cell cultures from breast cancer patients was determined using the sandwich ELISA. Amplification of the HER2 gene in the primary tumor cells was verified employing the FISH. ...
We investigated the antiproliferative effects of extracellular nicotinamide adenine dinucleotide against human malignant CaCo-2 (colon carcinoma), Hep
Zhang M, Lykke-Andersen S, Zhu B, et al. Characterising-regulatory variation in the transcriptome of histologically normal and tumour-derived pancreatic tissues. Gut. 2018;67(3):521-533. doi:10.1136/gutjnl-2016-313146. ...
Zhang M, Lykke-Andersen S, Zhu B, et al. Characterising-regulatory variation in the transcriptome of histologically normal and tumour-derived pancreatic tissues. Gut. 2018;67(3):521-533. doi:10.1136/gutjnl-2016-313146. ...
TY - JOUR. T1 - Characterization of a newly established human pancreatic carcinoma cell line, UK Pan-1. AU - Fralix, Kimberly D.. AU - Ahmed, Mansoor M.. AU - Mattingly, Cynthia. AU - Swiderski, Carol. AU - McGrath, Patrick C.. AU - Venkatasubbarao, Kolaparthi. AU - Kamada, Nanao. AU - Mohiuddin, Mohammed. AU - Strodel, William E.. AU - Freeman, James W.. PY - 2000/5/1. Y1 - 2000/5/1. N2 - BACKGROUND. A highly tumorigenic cell line designated as UK Pan-1 was established in a surgically removed human pancreatic adenocarcinoma and characterized as having many of the genotypic and phenotypic alterations commonly found in pancreatic tumors. METHODS. The cell line was characterized by its morphology, growth rate in monolayer culture and soft agar, tumorigenicity in nude mice, and chromosomal analysis. Furthermore, the status of p53, Ki-ras mutation and transforming growth factor (TGF)-β receptor expression were determined. The characteristics of UK Pan-1 were compared with those of other commonly ...
Cytokine production by the human bladder carcinoma cell line T24 in the presence of bacillus Calmette-Guerin (BCG).: The study was initiated as an in vitro appr
Substantial multiplication in vitro of cloned cells from a human embryonal carcinoma cell line, Tera 2, has been obtained in a basal medium (DMEM/Hams F12,50:50, v/v) supplemented with 10 micrograms low density lipoprotein/ml, 100 micrograms high density lipoprotein/ml, 100 ng multiplication stimulating activity/ml, 100 ng insulin/ml and 1 microgram transferrin/ml. The growth rate appears to be similar to that obtained in 10% serum. Furthermore, studies on the expression of cell surface receptors revealed that cloned Tera 2 cells express high-affinity receptors for IGF-II but not for insulin. The cells also express receptors for Epidermal Growth Factor (EGF) even though the addition of EGF does not stimulate their proliferation in serum-free medium. These results suggest that the expression of specific growth factor receptors is not an absolute determinant of hormone responsiveness. ...
Apoptosis is a form of cell death in which the cell actively participates. Apoptosis was induced in two human leukaemic cell lines, U937 and HL-60, by incubation with a diverse array of chemical agents. Cell death was assessed by gel electrophoresis, light microscopy and flow cytometry. It was demonstrated that apoptosis involved the formation of large kilobase pair DNA fragments (20-50, 145-245 and 580 kilobase pairs) prior to, or accompanying, internucleosomal cleavage. Degradation of DNA to large kilobase pair sizes also occurred in some forms of necrosis. These fragments were similar, but not identical, to those generated during apoptosis. The identity of the endonuclease(s) responsible for DNA cleavage to large kilobase pair fragments is as yet unknown. One suggestion is that topoisomerase II might be involved. Using an HL-60 subclone with reduced topoisomerase II expression, it was shown that topoisomerase II was not necessary for the formation of large kilobase pair DNA fragments and ...
TY - JOUR. T1 - Expression of the matrix metalloproteinase promatrilysin in coculture of prostate carcinoma cell lines. AU - Stratton, M. S.. AU - Sirvent, H.. AU - Udayakumar, T. S.. AU - Nagle, R. B.. AU - Bowden, G. T.. PY - 2001/8/22. Y1 - 2001/8/22. N2 - BACKGROUND. Matrix metalloproteinases (MMPs) are involved in tumor progression. Matrilysin (MMP-7) has been shown to be upregulated in prostatic carcinomas and can increase the invasive capacity of DU-145 cells. Because of the heterogenous nature of prostatic tumors, we examined promatrilysin expression in cocultures containing two different prostatic carcinoma cell lines, DU-145 and LNCaP. METHODS. Using enzyme linked immunosorbent assay (ELISA) analyses, promatrilysin expression was measured in DU-145/LNCaP cocultures and conditioned media cross-cultures. The effects of blocking IL-6 on promatrilysin expression were examined by pretreating conditioned media with IL-6 neutralizing antibody. RESULTS. A significant induction of promatrilysin ...
BioAssay record AID 103718 submitted by ChEMBL: In vitro cytotoxicity against human breast carcinoma cell line MCF-7 at 8.1*10e-5M.
In-Vitro Cytotoxic Effect of Linderina madayiparense Extracts against Human Lung Carcinoma Cell Lines (A-549), Umakrithika Chiranjeevi, Anandarajagopal Kalusalingam, Ajaykumar Than
A cell line has been derived from a human prostatic carcinoma xenograft, CWR22R. This represents one of very few available cell lines representative of this disease. The cell line is derived from a xenograft that was serially propagated in mice after castration-induced regression and relapse of the …
TY - JOUR. T1 - Protective immunity induced by B7.1+IL-12 transfected tumor cells is abrogated by tumor growth in an immune privileged site. AU - Chen, P. W.. AU - Uno, T.. AU - Geer, D. G.. AU - Podack, E. R.. AU - Ksander, B. R.. PY - 1996/12/1. Y1 - 1996/12/1. N2 - Mice immunized with B7.1+IL-12 transfected tumor cells possess systemic anti-tumor immunity that protects mice from a second subcutaneous tumor challenge of untransfected cells. This study determines if these immunized mice are protected from a second tumor challenge delivered to an immunologically privileged site. Our previous results indicated that tumors growing within the immunologically privileged anterior chamber of the eye (AC) of naive mice induce systemic T cell tolerance. In these experiments we determined if tolerance could be imposed after mice were previously sensitized. DBA/2 mice were given a subcutaneous immunization with 1 × 106 P815 B7.1+IL-12 cells. One month later, mice received a second tumor challenge of ...
TY - JOUR. T1 - Suppression of in vivo tumorigenicity of rat hepatoma cell line KDH-8 cells by soluble TGF-β receptor type II. AU - Zhao, Wenli. AU - Kobayashi, Masonobu. AU - Ding, Wei. AU - Yuan, Lan. AU - Seth, Prem. AU - Cornain, Santoso. AU - Wang, Jingxin. AU - Okada, Futoshi. AU - Hosokawa, Masuo. PY - 2002/9/20. Y1 - 2002/9/20. N2 - We have previously reported that transforming growth factor beta (TGF-β) produced by rat hepatoma cell line KDH-8 cells suppressed the interleukin-2 (IL-2) production of T cells and the tumoricidal activity of macrophages in KDH-8 tumor-bearing rats and that the inhibition of TGF-β production by low-dose bleomycin restored these activities significantly. In this study, we established three transfectant clones with stable expression of soluble TGF-β receptor type II (sTRII), namely KT1, KT2 and KT3, and one with an empty vector used as control vector (KV), and then investigated the effects of sTRII on the tumorigenicity of KDH-8 cells and immune responses ...
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Prostaglandins are synthesized from arachidonic acid by the enzyme cyclo-oxygenase. There are two isoforms of cyclooxygenases: COX-1 (a constitutive form) and COX-2 (an inducible form). COX-2 has recently been categorized as an immediate-early gene and is associated with cellular growth and differen …
Polyamines (PAs) are involved in regulation of cell growth and cellular survival by interacting with processes like translation, transcription or ion transport. It is described that polyamines can induce apoptosis in mesenchymal cell lines. The aim of our study was to analyze whether the physiological PAs (putrescine, spermidine or spermine) or the PA-derivate deoxyspergualin (DSG), a novel immunosuppressant, induce apoptosis in immunocompetent cells. Furthermore, we wanted to investigate which molecular mechanisms are involved in the execution of the cell death program. By means of flow cytometric analysis we found an induction of apoptosis by spermine (Spm) and DSG in quiescent and activated PBMCs, PHA generated lymphoblasts, and various tumor cell lines (Jurkat, SKW-3, U937). Moreover, DSG and Spm triggered apoptosis in human Fas-deficient cells and in cell lines MV4.11. and RS4.11., which are described to be resistant to apoptosis induction by many conventional chemotherapeutic agents. ...
BioAssay record AID 104079 submitted by ChEMBL: In vitro cytotoxicity against human mammary carcinoma cells 180 fold resistant to adriamycin MCF7-R.
1 Growth of Human Lung Tumor Cells in Culture Reen Wu Center for Comparative Respiratory Biology and Medicine, Schools of Medicine and Veterinary Medicine, University of California at Davis, Davis, California,
Tumour cells release membrane micro(nano)fragments called tumour-derived microvesicles (TMV) that are believed to play an important role in cancer progression. TMV suppress/modify antitumour response of the host, but there is also some evidence for their direct interaction with cancer cells. In cancer patients TMV are
3020 A variety of human carcinoma cells express high levels of interleukin-13 receptorα2 chain, a primary binding subunit of IL-13R complex in vitro and in vivo. These receptors could be targeted by a chimeric fusion protein consisting of Interleukin-13 and a truncated form of Pseudomonas exotoxin (IL-13PE38). Microarray analysis of adrenomedullin (AM) transfected human prostate tumor PC-3 cells showed that human and rat AM up-regulated the IL-13Rα2 chain gene. We now demonstrate that IL-13Rα2 chain is also up regulated in two human breast tumor cell lines (MCF-7 and MDA-MB-231) and one prostate carcinoma (PC-3) cell line after treatment with AM. RT-PCR results confirmed that mRNAs for IL-13Rα2 were enhanced 2.5 to 4 fold in 24 and 48 hr AM treated cells, respectively compared to control cells. Indirect immunofluorescence assay (IFA) revealed that protein level of IL-13Rα2 were also increased in AM treated breast and prostate carcinoma cells. To understand the mechanism of up-regulation, ...
Choong et al. used a database of expressed proteins for a hepatocellular carcinoma-derived cell line (HCC-M), separated by two-dimensional gel electrophoresis, that they had developed previously. The separated proteins were fingerprinted by using peptide mass spectrometric techniques. From these data they could identify novel proteins that were not present in the SWISS-PROT or National Center for Biotechnology Infromation (NCBI) databases. One such protein was then taken for further analysis and was subjected to in-gel trypsin digestion and the products were sequenced using mass spectrometry. The sequences were then used to search an expressed sequence tag (EST) database and 40 DNA sequences obtained were assembled into a putative open reading frame. On the basis of this consensus DNA sequence, the authors named the protein HCC-1, and confirmed and extended the sequence using RACE (rapid amplification of cDNA ends).. A battery of bioinformatics tools was used to analyze the predicted protein, ...
TGFβ signaling has typically been associated with suppression of tumor initiation while the role it plays in metastasis is generally associated with progression of malignancy. However, we present evidence here for an anti-metastatic role of TGFβ signaling. To test the importance of TGFβ signaling to cell survival and metastasis we compared human colon carcinoma cell lines that are either non-tumorigenic with TGFβ response (FET), or tumorigenic with TGFβ response (FETα) or tumorigenic with abrogated TGFβ response via introduction of dominant negative TGFβRII (FETα/DN) and their ability to metastasize. Metastatic competency was assessed by orthotopic transplantation. Metastatic colony formation was assessed histologically and by imaging. Abrogation of TGFβ signaling through introduction of a dominant negative TGFβ receptor II (TGFβRII) in non-metastatic FETα human colon cancer cells permits metastasis to distal organs, but importantly does not reduce invasive behavior at the primary site.
DataMed is a prototype biomedical data search engine. Its goal is to discover data sets across data repositories or data aggregators. In the future it will allow searching outside these boundaries. DataMed supports the NIH-endorsed FAIR principles of Findability, Accessibility, Interoperability and Reusability of datasets with current functionality assisting in finding datasets and providing access information about them.
Buy our SK N SH (human neuroblastoma cell line) whole cell lysate. ab3956 has been validated in western blot. Abcam now offers a 12-month guarantee.
By analysing a human lung tumour cell line subtraction cDNA library, we have identified and characterized a novel member of the human S100 gene family that we designated S100A14. The full-length cDNA is 1067 bp and encodes a putative protein of 104 amino acids. The predicted protein contains the S100-specific EF-hand calcium-binding domain. The gene is ubiquitously expressed in normal human tissues of epithelial origin. S100A14 transcript was found to be down-regulated in many immortalized and tumour cell lines from diverse tissues. In contrast to the tumour cell lines, S100A14 shows up-regulation at the mRNA and protein level in many human primary tumours, including lung and breast carcinomas. To elucidate mechanisms whereby S100A14 expression is enhanced in lung and breast tumours, we studied the effects of epidermal growth factor (EGF) and transforming growth factor-alpha (TGF-alpha) on its expression. Both are ligands of ERBB receptor and induced S100A14 expression in the immortalized ...
Cellular Biology:, Neoplasm:, Serology: Antigen, Tissue Culture:, Types of Tumors:, Transplantable Tumors: YCAB, Genes: H-2 - Histocompatibility-2, Strains: BALB/C. ...
IL-13Rα2 chain has been shown to play a unique role in tumor biology. It is overexpressed in a variety of primary tumor cell cultures and tumor cell lines (13, 15-18, 25, 34), whereas normal cells including lymphoid cells, endothelial cells, and astrocytes (13, 15, 17, 26) do not express or express low levels of this cytokine receptor chain. Recent studies have demonstrated that overexpression of IL-13Rα2 chain in certain breast and pancreatic cancer cell lines resulted into loss of tumorigenicity, whereas unmodified control tumor cells formed enlarging tumor nodules when injected in immunodeficient mice (46). In another study, Terabe et al. (47) have demonstrated that the soluble form of IL-13Rα2 chain (5) can modulate immune environment and shift Th2 phenotype to a dominant Th1 phenotype. This shift resulted into resistance of 15-12RM cell-derived tumor recurrence. Thus, further investigation of the role of IL-13Rα2 chain in tumor immunology and targeting has become extremely ...
Work in this thesis was primarily involved with the characterisation of four receptors, the turkey and bovine P2Y1, and the human P2Y2 and P2Y4 receptors, transfected into the human astrocytoma cell line, 1321N1. It also describes the preliminary characterisation of two vascular smooth muscle cell types, and the generation of P2Y1-GST fusion proteins for the production of antibodies.;1321N1 cells were found to release nucleotides in response to sheer stress, but this was overcome by adaptation of the stimulation method. 1321N1 cells expressing the four receptors were assayed for PLC activity, and the rank order of agonist potency for each receptor was generally consistent with reports in the literature. Nucleotide interconversion at the surface of 1321N1 cells was also examined indirectly using the ecto-ATPase inhibitor ARL 67156 and hexokinase. Although there was no significant effect of nucleotide breakdown on the agonist concentration-responses, it was found that upstream conversion of ...
Many cancer patients develop tumor-reactive immune responses against antigens that are either expressed on the surface of tumor cells or released from them into the peripheral circulation. In this study, tumor-reactive immunoglobulins, present in the sera of ovarian cancer patients, were used to identify commonly recognized tumor-associated antigens on ovarian tumor cells. Western immunoblot analysis of cellular proteins, obtained from UL-1 ovarian tumor cell line, demonstrated several commonly recognized immunoreactive proteins. Two of these proteins (Mr 32,000 and 71,000) were selected for further investigation. Cellular proteins isolated from normal human ovarian epithelia, in a similar fashion, failed to exhibit corresponding immunoreactivity to these proteins. As an additional control, sera from normal (nontumor-bearing) individuals failed to identify these proteins on Western immunoblots. Furthermore, the absorption of the ovarian cancer patients sera with normal ovarian epithelial tissue ...
Cell culture. Six gastric cancer cell lines (KE-39, KE-97, HuG1-N, HuG1-PI, ECC-10, and ECC-12) were incubated in RPMI 1640 with 10% FCS (Life Technologies/Invitrogen Corp.) at 37°C. Other tumor cell lines were maintained in DMEM with 10% FCS (Life Technologies/Invitrogen Corp.) at 37°C. FK228 (a gift from Fujisawa Corporation) was used at concentrations of 1.0 to 2.5 ng/mL.. Plasmids and transfection. pCAGF1-IG (empty vector), pCAGF1-IG-Brm, pCAGF1-IG-Brm-KR, pCAGF1-IG-BRG1, and pCAGF1-IG-BRG1-KR were prepared as described previously ( 26). All transfections were done using Lipofectamine Plus (Invitrogen Corp.).. Western blotting. An anti-Brm antibody (Transgenic, Inc.), anti-BRG1 antibody (H-88; Santa Cruz Biotechnology), and anti-BAF47/Ini1 antibody (BD Transduction Laboratories) were used, and immunostaining was done as described previously ( 24).. Immunohistochemistry. Cells were fixed with 4% paraformaldehyde at 37°C for 1 h. After treatments with 0.2% Triton-X100 for 20 min at room ...
A stable LifeAct-TagGFP2 expressing human fibrosarcoma cell line Long-term actin visualization - 25 passages guaranteed Characteristics proven to be identica...
Aberrant growth factor production is a prevalent mechanism in tumourigenesis. If T-cells responded positively to a cancer-derived cytokine, this might result in selective enhancement of function within the tumour microenvironment. Here, we have chosen colony-stimulating factor-1 (CSF-1) as a candidate to test this concept. CSF-1 is greatly overproduced in many cancers but has no direct effects upon T-lymphocytes, which do not express the c-fms-encoded CSF-1 receptor. To confer CSF-1-responsiveness, we have expressed the human c fins gene in immortalized and primary T-cells. Addition of soluble CSF-1 resulted in synergistic enhancement of IL-2-driven T-cell proliferation. CSF-1 also co-stimulated the production of interferon (IFN)-gamma by activated T-cells. These effects required Y809 of the CSF-1R and activation of the Ras-MEK-MAP kinase cascade, but were independent of PI3K signalling. T-cells that express c-fins are also responsive to membrane-anchored CSF-1 (mCSF-1) which, unlike its soluble ...
Biolidics and the detection of tumoral cells on bloodstream , the new machine for liquid biopsies that allows to detects tumoral cells.
IL-4(38-37)-PE38KDEL is a targeted fusion protein that specifically attaches to cells expressing IL-4Rs reported to be present on many different solid tumor cells of varying pathology (21) . After binding to the IL-4R, the fusion protein is internalized, and then the toxin portion of the molecule causes the ADP ribosylation of elongation factor 2 and arrests protein synthesis (22) . The cell dies by apoptosis attributable to the lack of new protein synthesis (23) . Human brain tumor cells are particularly enriched in the expression of IL-4Rs on their cell surface (9 , 10) . Although numerous preclinical safety and efficacy experiments have been performed with IL-4(38-37)-PE38KDEL, this targeted drug has not been administered to humans before. Here we demonstrate for the first time that intraglioma administration of IL-4(38-37)-PE38KDEL to patients is safe. No treatmentrelated deaths or life-threatening toxicities were observed in any patient. In six of nine patients, administration of ...
Great progress has been made over the past two decades in the development of animal models for ovarian cancer. Each generation of animal model has had its advantages and limitations. The earliest models used a xenograft approach in which human ovarian tumor cells or tissues were grown in immunodeficient mice (17, 27, 32, 33, 36). The xenograft model preserved the complex interactions that occur between cancer cells and their microenvironment, including stromal-epithelial cell interactions, as well as influences of matrix proteins, growth factors, and angiogenesis. Thus, this model was a great advance over cell culture model systems and advanced the study of therapeutic interventions. However, an important weakness in the xenograft model was the lack of host immunity, which severely limited the ability to reliably predict the effect of noncancer immune-host influences on outcomes. In addition, tumors were introduced in the xenograft model rather than arising as primary lesions in the ovary, thus ...
The purpose of this study was to evaluate the effect of plasma-activated media (PAM) on a multicellular tumor spheroid (MCTS) obtained using HCT116 colon carcin...
This unit describes the use of retroviral vectors that can be successfully employed for gene transfer into both primary tumor cultures and established cell lines
CLS weist eine Sammlung von insgesamt 30 verschiedenen Tumorzellen des Gehirns auf (Stand: Dezember 2016). Eine bersicht ber alle derzeitigen Zelllinien isoliert aus Hirntumoren k nnen Sie unter Panel Brain Tumor cell lines. als PDF herunterladen. Die Informationen sind unterteilt in Tabelle 1, die allgemeine Daten enth lt, sowie in Tabelle 2, die Zellmarker, Tumorantigene, Mutationen sowie Zytokine, soweit bekannt, auflistet. ...
CLS weist eine Sammlung von insgesamt 30 verschiedenen Tumorzellen des Gehirns auf (Stand: Dezember 2016). Eine bersicht ber alle derzeitigen Zelllinien isoliert aus Hirntumoren k nnen Sie unter Panel Brain Tumor cell lines. als PDF herunterladen. Die Informationen sind unterteilt in Tabelle 1, die allgemeine Daten enth lt, sowie in Tabelle 2, die Zellmarker, Tumorantigene, Mutationen sowie Zytokine, soweit bekannt, auflistet. ...
Tumor-derived cell lines matched to either normal or metastatic cell lines obtained from the same patient provide a valuable resource for cancer studies. The availability of such models allows researchers to compare tumor lines to their normal counterparts.
Tumor-derived cell lines matched to either normal or metastatic cell lines obtained from the same patient provide a valuable resource for cancer studies. The availability of such models allows researchers to compare tumor lines to their normal counterparts.
Pathology Department, Harvard Medical School, Boston, Massachusetts 02115-5701, USA. We have investigated the functional integrity of the retinoblastoma tumor suppressor pathway in five human squamous cell carcinoma lines. Elevated activity of cyclin-dependent kinase 6 (cdk6), a pRB kinase, was detected in all five squamous cell carcinoma lines. Overexpression of the cdk6 protein was detected in one of the five cell lines. The cdk6-specific inhibitor p18ink4C is expressed and associated with cdk6 in all five squamous cell carcinoma lines. In contrast, only very low levels of p16ink4A were detected in these cell lines. This may contribute to the elevated activity of cdk6 in these lines. Elevated activity of cdk6 may result in hyperphosphorylation of the retinoblastoma protein and, therefore, compromise its negative growth-regulatory activity ...
TY - JOUR. T1 - Cantharidin-induced cytotoxicity and cyclooxygenase 2 expression in human bladder carcinoma cell line. AU - Huan, Steven Kuan Hua. AU - Lee, Hao Hsien. AU - Liu, Der Zen. AU - Wu, Chien Chih. AU - Wang, Ching Chiung. PY - 2006/6/1. Y1 - 2006/6/1. N2 - Mylabris is used in clinical therapy, but is always accompanied by cystitis. The toxic effects of mylabris on bladder are attributed to its active principle: cantharidin. In the present study, we explored how cantharidin induces cytotoxicity in the bladder. Human bladder carcinoma cell line T 24 cells were used as target cells, and human colon carcinoma HT 29 cells as native cells. Cantharidin exhibited acute cytotoxicity in the T 24 cells, and IC50 was 21.8, 11.2 and 4.6 μM after treatment for 6, 24 and 48 h, respectively. The cytotoxicity of cantharidin was not significantly enhanced when T 24 cells were treated for a longer time. Moreover, PARP proteins and pro-caspase 3, Bcl-2 were significantly inhibited after cantharidin ...
Despite multimodal treatment malignant gliomas still remain incurable. Molecular markers represent a useful tool for the development of tailored therapeutic options. In gliomas the transcription factor HIF-1α, a key mediator of hypoxic response, is a poor prognostic marker. In contrast, mutations in the IDH enzymes are associated with better outcome for patients with glioma. The aim of the present thesis was to investigate the influence of HIF-1α-Inhibition and expression of mutant IDH1 on cell biological and radiobiological behavior of malignant glioma cell lines. Targeting HIF-1α attenuated the hypoxia-induced radioresistance of the investigated glioma cell lines. Furthermore, overexpression of mutant IDH1 caused a less aggressive phenotype and was directly linked to an increased sensitivity to radiotherapy of glioma cells independent of the oxygen conditions. In conclusion, inhibition of HIF-1α is a promising strategy to sensitize hypoxic gliomas to radiotherapy and detection of the ...
To investigate the patterns of genetic lesions in a panel of 23 human multiple myeloma cell lines (HMCLs), we made a genomic integrative analysis involving FISH, and both gene expression and genome-wide profiling approaches. The expression profiles of the genes targeted by the main IGH translocations showed that the WHSC1/MMSET gene involved in t(4;14)(p16;q32) was expressed at different levels in all of the HMCLs, and that the expression of the MAF gene was not restricted to the HMCLs carrying t(14;16)(q32;q23). Supervised analyses identified a limited number of genes specifically associated with t(4;14) and involved in different biological processes. The signature related to MAF/MAFB expression included the known MAF target genes CCND2 and ITGB7, as well as genes controlling cell shape and cell adhesion. Genome-wide DNA profiling allowed the identification of a gain on chromosome arm 1q in 88% of the analyzed cell lines, together with recurrent gains on 8q, 18q, 7q, and 20q; the most frequent ...
It was reported previously that the specific aim of screening agents that would induce apoptosis in the human breast carcinoma cell line MDA-MB-231 was completed, and that calyculin A was the most effective compound tested. Since then Cdc25 phosphatases were reported as possible key oncogenes in human breast carcinoma. In light of our results with calyculin A, it was decided that a more promising focus for the project would be the biochemical basis for the oncogenic actions of Cdc25 phosphatases in human breast carcinoma. At this time we have examined 18 compounds and discovered a Cdc25 phosphatase inhibitor, called 1f, that selectively inhibits Cdc25A,B, and C, has antiproliferative activity against and causes a G1 block in MDA-MB-231 cells. The pure form of this compound and two other compounds which selectively inhibit Cdc25 phosphatases have been made and also demonstrate an equal if not better inhibition of Cdc25 phosphatases as their combinatorial form.*HUMANS
In the present study we describe the establishment and characteristics of a new human tumor cell line (OV-1063) positive for carcinoembryonic antigen (CEA) originating from ovarian metastatic tumor cells. Analysis of the cultured cells during their in vitro adaptation period revealed while the primary culture exhibited a low proportion of CEA-positive cells, this proportion increased with culture passages and eventually more than 90% of the cells in the established line were CEA-positive. Thus, during the period of adaptation to in vitro growth, a selection for CEA-positive cells took place but the amount of CEA secreted per each positive cell seemed to be constant. Several tumor-associated characteristics were found positive on the established OV-1063 cell line. The in vitro growing cell line exhibited an abnormal chromosome pattern with a near-trisomy karyotype for some chromosomes, colony formation in soft agar as well as positive staining with a monoclonal antibody B38.1. Culture supernatants of the
A team of researchers at the Sylvester Comprehensive Cancer Center at the University of Miami Miller School of Medicine has developed a technique for growing ovarian cancer cell lines that mimic the original tumor in long-term cultures. The technique offers hope for quickly advancing precision medicine applications for a variety of cancers by enabling clinicians to test therapies on cells from a patients own tumor in the laboratory, thus identifying the most targeted therapy for that patient. The results of the research, which was led by Tan A. Ince, M.D., Ph.D., associate professor of pathology, Scientific Director of Sylvesters Live Tumor Culture Core and Tissue Bank Core Facility, and Director of the Tumor Stem Cell Division at the Interdisciplinary Stem Cell Institute, have been published online in the journal Nature Communications in an article entitled Characterization of Twenty-Five Ovarian Tumour Cell Lines that Phenocopy Primary Tumours. The key to Inces research is his development ...
298168476 - EP 0869803 B1 20030416 - ALLOGENEIC PARACRINE CYTOKINE TUMOR VACCINES - [origin: WO9724132A1] The present invention provides a method of treating cancer comprising (a) obtaining a tumor cell line, (b) modifying the tumor cell line to render it capable of producing an increased level of a cytokine relative to the unmodified tumor cell line, and (c) administering the tumor cell line to a mammalian host having at least one tumor that is the same type of tumor as that from which the tumor cell line was obtained, wherein the tumor cell line is allogeneic and is not MHC-matched to the host. The present invention also provides a pancreatic tumor cell line, a method and medium for obtaining such a tumor cell line, and a composition comprised of cells of a purified pancreatic tumor cell line.[origin: WO9724132A1] The present invention provides a method of treating cancer comprising (a) obtaining a tumor cell line, (b) modifying the tumor cell line to render it capable of producing an increased level
Cell lines are invaluable tools for biomedical research. Cancer cell lines are the foundation of cancer biology and the quest for drug treatments. Adenocarcinoma is a cancer of the epithelium (including colon) and originates in glandular tissue, such as skin surface layer and glands.. Product. These human adenocarcinoma cell lines have been previously licensed to commercial parties for research into human adenocarcinoma treatments.. These cell lines are available through Public Health England ECACC. Please make your purchase through the links below.. Imperial Innovations requests that commercial/for profit parties contact them first to discuss the terms of supply prior to Innovations authorising the release of supplies from ECACC.. ...
MMP-2 production by tumor cells has been demonstrated to play a fundamental role in ECM degradation and tumor cell invasion (for review see 5 . The recent finding of reduced tumor progression in MMP-2-deficient mice (57) highlights the importance of this molecule. In this study, we wished to determine how MMP-2 gene expression is regulated in human astroglioma cells, as a strong correlation has been observed between astroglioma invasion and MMP-2 expression (17, 19, 20, 22, 23, 27). Our results indicate that two cytokines, TNF-α and IFN-γ, partially inhibit MMP-2 gene expression and can function together in an additive manner for near-complete inhibition of MMP-2 expression in human astroglioma cells. TNF-α/IFN-γ inhibition of MMP-2 expression was observed at several levels: on gelatinolytic activity as determined by zymography, on protein expression (both ProMMP-2 and activated MMP-2) as assessed by immunoblotting, on MMP-2 mRNA expression, and on MMP-2 promoter activity. Our results also ...
MDA-MB-435, a member of the NCI-DTP panel of 60 human tumor cell lines, has been used for decades as a model of metastatic human breast cancer. This cell line was derived at M.D. Anderson in 1976 from a pleural effusion from a 31-year old woman with a history of breast cancer (Cailleau R, Olive M, Cruciger QV. Long-term human breast carcinoma cell lines of metastatic origin: preliminary characterization. In Vitro. 1978 Nov;14(11):911-5.; Brinkley BR, Beall PT, Wible LJ, Mace ML, Turner DS, Cailleau RM. Variations in cell form and cytoskeleton in human breast carcinoma cells in vitro. Cancer Res. 1980 Sep;40(9):3118-29.) Further background information on this cell line may be found at the M.D. Anderson Breast Cancer Cell Line Database.. Recent advances in gene expression analysis allow the opportunity to more fully characterize tumor cell lines. Analysis of MDA-MB-435, in conjunction with the rest of the NCI60 panel, revealed that the pattern of gene expression for MDA-MB-435 more closely ...
Data presented above show that the human fibrosarcoma cell line HT1080 is able to inhibit the growth of experimental metastases. These results suggest that this inhibition is due to the antiangiogenic activity of circulating TSP-1 that is released by the tumor cells in vivo, circulates at effective levels, and makes the tumor-bearing animals unable to mount an angiogenic response. The data also demonstrate the in vivo efficacy of soluble TSP-1, showing it can be used as a drug to prevent the growth of experimental metastases.. HT1080 produced concomitant tumor resistance directly by secreting active TSP-1, unlike previously studied rodent tumors that create an antiangiogenic state when the tumor cells, or associated stromal elements (29), secrete enzymes or activators of enzymes (30) that generate inhibitors from other molecules. We saw no significant evidence for in vivo breakdown of tumor-derived TSP-1 to fragments smaller than the 140 kDa monomer, a molecule that is as effective an ...
4Discussion. This study addressed the question of which are the cellular processes that sensitive leukemic cells induced to achieve tolerance to vincristine. To this end, the B-ALL cell line CCRF-SB was gradually exposed until cell proliferation was observed in the presence of 6nM vincristine, and the corresponding proteomic profile was compared to that of cells grown in the absence of the chemotherapeutic drug.. Chemoresistance may be intrinsic or acquired.18 The ability to tolerate high concentrations of chemotherapeutics of an intrinsically resistant cancer cell is not developed as a result of an exposition to the drugs; instead it is the result of genetic abnormalities the cell carries before exposition.18 By contrast, acquired chemoresistance is developed after the cancer cell is exposed to the drug and may be the result of molecular evolution of resistant clones.19 Experimental settings to study acquired chemoresistance include the comparison of matched paired samples at diagnosis and ...
Expression of programmed cell death ligand 1 (PD-L1) is an important process by which tumor cells suppress antitumor immunity in the tumor microenvironment. Bone marrow (BM)-derived immune cells are an important component of the tumor microenvironment. However, the link between PD-L1 induction on tumor cells and communication with BM cells is unknown. This study demonstrates that BM cells have a direct effect in inducing PD-L1 expression on tumor cells, which contributes to the tumor cells drug resistance. This novel discovery was revealed using a co-incubation system with BM cells and tumor cells. BM cells from wild-type C57BL6 mice and the immune-deficient mouse strains B-cell−/−, CD28−/−, perforin−/−, and Rag2−/− but not CD11b−/− dramatically increased the expression of tumor cell surface PD-L1. This PD-L1 induction was dependent on CD11b-positive BM cells through direct contact with tumor cells. Furthermore, p38 signaling was activated in tumor cells after co-incubation with BM
Expression of programmed cell death ligand 1 (PD-L1) is an important process by which tumor cells suppress antitumor immunity in the tumor microenvironment. Bone marrow (BM)-derived immune cells are an important component of the tumor microenvironment. However, the link between PD-L1 induction on tumor cells and communication with BM cells is unknown. This study demonstrates that BM cells have a direct effect in inducing PD-L1 expression on tumor cells, which contributes to the tumor cells drug resistance. This novel discovery was revealed using a co-incubation system with BM cells and tumor cells. BM cells from wild-type C57BL6 mice and the immune-deficient mouse strains B-cell−/−, CD28−/−, perforin−/−, and Rag2−/− but not CD11b−/− dramatically increased the expression of tumor cell surface PD-L1. This PD-L1 induction was dependent on CD11b-positive BM cells through direct contact with tumor cells. Furthermore, p38 signaling was activated in tumor cells after co-incubation with BM
Natural products, especially supplementary metabolites produced by plants under stressed conditions, are shown to have different pharmacological impacts from one to another. cell lines. The existing study aims to research the power of crude nonpolar, semi-polar, and polar components of leaves to activate different required mechanisms that may prevent tumor cell proliferation or stimulate tumor cell apoptosis. 2. Outcomes: 2.1. Cytotoxicity The ready crude components had been examined against different tumor cell lines: MCF-7, HCT-116, and HepG2. The outcomes exposed that hexane and ethyl acetate components produced a substantial impact in comparison to in solid tumor cell lines MCF-7, HCT-116, and HepG2. Cells had been subjected to the components for 72 h. Cell viability was determined using SRB-U SulphoRhodamine-B data and assay are expressed as mean S.D. (n = 3). Desk 1 IC50 (g/mL) of different components of in various solid tumor cell lines. for 48 h, stained with AO/EB. The pictures had been ...
Pancreatic cancer has long carried poor prognosis. The development of new therapeutic approaches is particularly urgent. Inactivation of the tumor-suppressor gene p16(INK4a/CDKN2), a specific inhibitor of the cyclin-dependent kinases CDK4 and CDK6, is the most common genetic alteration in human pancreatic cancer, making it an ideal target for gene replacement. Here we transfected tumor cells using a recombinant adenovirus containing the wt-p16 cDNA (Ad5RSV-p16). The overexpression of p16 decreased cell proliferation in all four human pancreatic tumor cell lines (NP-9, NP-18, NP-29, and NP-31). However, G1 arrest and senescence were observed in only three. In contrast, the fourth (NP-18) showed a significant increase in apoptosis. This differential behavior may be related to the differences found in the expression level of E2F-1. Experiments on subcutaneous pancreatic xenografts demonstrated the effectiveness of p16 in the inhibition of pancreatic tumor growth in vivo. Taken together, our results ...
Recent evidence suggests a direct antiproliferative effect of LHRH agonists on the prostatic carcinoma cell line LNCaP. In the present study the possible presence of a LHRH degrading activity (LHRH-DA) in soluble fractions of LNCaP cell homogenates has been investigated. The results obtained show that an LHRH-DA is present in the soluble fraction of LNCaP cells with apparent Km and Vmax values of 31.6 mu M and 4.5 pmol/min/mu g protein respectively. The degradation pattern of LHRH is characterized by two major initial degradation products identified as LHRH 1-5 and LHRH 1-6 fragments. The degradation of the tracer [pGlu-H-3]LHRH, used as a substrate, is inhibited by synthetic unlabelled LHRH (IC50 7.9 mu M) and by several LHRH agonists with different kinetics and potencies; the LHRH agonist [DSer-(tBu)(6),Gly(10)-Aza]LHRH was the most potent blocker of LHRH-DA present in LNCaP cells; this enzymatic activity is also inhibited in a dose dependent manner by somatostatin, TRH, bacitracin and ...
We found that knocking down these transcripts in vitro with antisense oligonucleotide (ASO) induces selective death of several human and murine tumor cell lines without affecting viability of normal cells. The aim of this study was to evaluate in vitro and in vivo, the therapeutic value of silencing the ASncmtRNA with ASO in human cell lines/primary cultures and in A498 xenograft and Patient derived xenograft (PDX) RCC model.. Methods: For the in vitro studies we used different human renal carcinoma cell lines (786-O, Caki-1, A498) and 6 primary cultures derived from RCC patients. Knock down of the ASncmtRNA was achieved by transfection of ASO targeted to the loop region of these transcripts (Andes-1537). As control, we used ASO with unrelated sequence (NR-ASO). Cell death was evaluated with FACS by PI and tripan exclusion assay and the decrease in tumorigenicity was determined by sphere assay. The apoptosis hallmarks evaluated were Caspase activation, DNA fragmentation and phosphatidylserine ...
Detail záznamu - Neoplastic progression of the human breast cancer cell line G3S1 is associated with elevation of cytoskeletal dynamics and upregulation of MT1-MMP - Detail záznamu - Knihovna Akademie věd České republiky
To study potential sources of tumor-associated Ags in human ovarian cancer, we have established two ovarian tumor cell lines (OvS1 and OvA2) from two ovarian cancer patients, which express the cellular oncogene HER2/neu. Corresponding tumor infiltrating lymphocyte cultures have also been established and display an autologous tumor-specific pattern of cytotoxicity that is HLA-A2 restricted. To determine the potential relationship between HER2/neu expression and CTL-mediated cytolysis, we first established tumor cell clones from OvS1. These were categorized as high or low expressors of HER2/neu (cOvS1+ or cOvS1-, respectively), and cOvS1+ clones displayed a significantly higher sensitivity to CTL killing as compared with cOvS1- clones. To modulate the expression of HER2/neu, ovarian cancer cells were treated with IFN-gamma. After this exposure, HER2/neu expression was significantly decreased, whereas the expression of HLA Class I was significantly increased. Despite the increase in HLA Class I ...
The cyclin-dependent kinase member, Cdk5, is expressed in a variety of cell types, but neuron-specific expression of its activator, p35, is thought to limit its activity to neurons. Here we demonstrate that both Cdk5 and p35 are expressed in the human astrocytoma cell line, U373. Cdk5 and p35 are present in the detergent-insoluble cytoskeletal fraction of this cell line and Cdk5 localizes to filopodia and vinculin-rich regions of cell-matrix contact in lamellopodia. When exposed to a 46(o)C heat shock, U373 cells change shape, lose cell-matrix contacts and show increased levels of apoptosis. To test whether Cdk5 activation might play a role in these events, U373 cells were stably transfected with histidine-tagged or green fluorescent protein-tagged constructs of Cdk5 or a dominant negative mutation, Cdk5T33. Under normal growth conditions, growth characteristics of the stably transfected lines were indistinguishable from untransfected U373 cells and Cdk5 localization was not changed. However, ...
Amphiregulin (AR) is a newly discovered glycosylated, 84-amino acid residue polypeptide growth regulator which has sequence homology to the EGF family of proteins. To obtain immunological reagents to study the biological role of AR, two synthetic peptides containing sequences corresponding to distinct regions of AR were used to generate polyclonal antibodies in rabbits. One preparation of antipeptide antibodies directed against residues 26-44 of AR (AR-Ab2) was most effective in the detection of native AR, whereas another preparation of antibodies against residues 8-26 (AR-Ab1) was found to be most efficacious in the detection of AR in formalin-fixed and paraffin-embedded tissues. The growth of a colon carcinoma cell line, Geo, which proliferates autonomously under serum-free conditions, was stimulated by the exogenous addition of AR or EGF. Half-maximal stimulation of this growth was observed at 40 and 200 pM of EGF and AR, respectively. A mAb to the extracellular domain of the EGF receptor ...
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Additional comment: After the equilibration, the IPG gel strips were cut to size. Six mm were removed from the anodic end and 14 mm from the cathodic end. The second dimension gels were overlayered with a solution containing agarose (0.5% w/v) and Tris-glycine-SDS (25 mM-198 mM-0.1% w/v) pH 8.3 heated at about 70o C and the IPG gel strips were immediately loaded through it ...
Scale bar: 100 μm. B. The proliferation of atypical tumor cells with osteoid formation is shown. Xenografted tumor cells resemble original tumor cells. Scale bar: 50 μm. Cell growth and morphological findings in vitro UTOS-1 cells were spindle-shaped, contained several nucleoli, and formed clumps. Two weeks after initial cultivation in primary culture, the tumor cells reached subconfluence with some Pictilisib piled-up foci selleck products of cells (Figure 4A). After the cells were serially subcultured for about 3 months, they began to grow rapidly at passage 6 (Figure 4B). Figure 4 Morphology under phase-contrast microscopy. A. In primary. culture, spindle-shaped tumor cells reach subconfluence with some piled-up foci of cells. Scale bar: 100 μm. B. At passage. 6, the tumor cells begin to grow rapidly. The configuration of tumor cells is equalized after the 6th generation. Scale bar: 100 μm. This new cell line has been maintained in vitro for more than 50 passages over more than 2 years. ...
Single Cell Profiling of Circulating Tumor Cells: Transcriptional Heterogeneity and Diversity from Breast Cancer Cell Lines. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
Ovarian cancer is a cancer that forms in an ovary. It results in abnormal cells that have the ability to invade or spread to other parts of the body. SK-OV-3, NIH:OVCAR-3 and HO-8910 are the ovarian carcinoma cell lines derived from human ovarian tumor. Studies were carried out to determin
MiRNA-21 ASO reduced the colony formation capacity of human colon carcinoma cells. Human colon carcinoma cell line HCT116 cells were transiently transfected wit
Rae-1 alpha, beta, gamma, δ and epsilon (retinoic acid early transcript 1) comprise a family of closely related (88‑95% amino acid identity) GPI-linked cell surface proteins that function as ligands for mouse NKG2D, an activating receptor expressed on NK and T cells. Rae-1 transcripts are expressed in mouse embryos and several tumor cell lines but are absent from most normal adult tissues. Rae-1 protein expression on tumor cell lines has been implicated in in vivo tumor rejection ...
TABLE-US-00004 TABLE 4 CTC CTPC Analysis of Cells Migrating from Tumor Cultures Cell Count CTC CTPC Test (Viable/ Clus- Clus- Group Sample Total) CTCs ters CTPCs ters 1 Day 2, 5, 7 ,1%/nd .sup. 70 4 44 0 Pool1,2 Day 9, 13, ,1%/nd .sup. 44 2 20 0 15 Pool1,2 Day 17, 19, 1360/12,600 0 0 4 2 21 Pool1,2 Day 23, 26, 1340/10,800 26 2 30 4 28 Pool1 Day 33 2,230/2,800.sup. 32 0 40 0 Day 35 1,700/8,500.sup. 54 0 46 0 Day 40 190/1,000 74 0 44 0 2 Day 2, 5, 7 ,1%/nd .sup. 166 0 76 2 Pool1,2 Day 9, 13, ,1%/nd .sup. 18 0 16 0 15 Pool1,2 Day 17, 19, 880/2,600 6 0 10 0 21 Pool1,2 Day 23, 26, 740/3,000 0 0 28 4 28 Pool1 Day 33 2,450/2,800.sup. 52 0 48 0 Day 35 1,420/3,500.sup. 62 0 50 0 Day 40 740/2,000 84 2 64 4 3 Day 2, 5, 7 ,1%/nd .sup. 80 0 74 0 Pool1,2 Day 9, 13, ,1%/nd .sup. 12 0 6 0 15 Pool1,2 Day 17, 19, 340/15,600 6 2 20 2 21 Pool1,2 Day 23, 26, 640/10,200 32 2 8 0 28 Pool1 Day 33 3,350/3,500.sup. 140 0 92 0 Day 35 980/2,000 46 0 34 0 Day 40 280/1,500 160 0 122 0 1Individual samples were frozen and ...
TY - JOUR. T1 - Experimental approaches to problems of invasion and metastasis.. AU - Paweletz, N.. AU - Paku, S.. AU - Werling, H. O.. AU - Spiess, E.. PY - 1986/1/1. Y1 - 1986/1/1. N2 - The highly metastasizing ASML cells and the non-metastasizing AS cells, arisen as spontaneous tumors of the rat, were confronted with rat lung tissue in vitro. Small cubes of the lung were allowed to heal their cut edges, then tumor cells were added. Both tumor cell types adapted their shape to the environment, penetrated the superficial layer of lung cells, either of epithelial or of fibroblastoid character and settled on the basal lamina, which, however, was not pierced. In a second set of experiments the tumor cells were inoculated intravenously into the living animal. The lung loaded with tumor cells was excised and cut into cubes which were then incubated in vitro. Here also both tumor cell types exhibited an invasive behavior but the basal lamina of the vessels in which the tumor cells have been arrested ...
The liver is a common site of metastases from a variety of organs such as lung, breast, colon and rectum. When liver metastases occur at the time of initial diagnosis of the primary tumor, they are described as synchronous. If detected after the initial diagnosis, they are described as metachronous. The liver is frequently involved since it receives blood from the abdominal organs via the portal vein. Malignant cells detach from the primary cancer, enter the bloodstream or lymphatic channels, travel to the liver, and grow independently. We do not understand the mechanism of how a tumor cell can leave the primary site and grow in specific organs. Potentially, the environment of the liver is suitable to the growth of certain tumor cells. Once a tumor begins to grow in the liver, it receives its blood supply from the hepatic artery ...
Oligonucleotides having approximately 8 to 18 nucleotide units and a 3-tail which includes asteroid structure attached to the 3-end through the A ring of the steroid skeleton and which form substantially stable duplexes at physiological temperature, have selective cytotoxic activity against certain tumor cell lines.
Buy our Raji (human Burkitts lymphoma cell line) membrane lysate, tumor cell line. ab30126 has been validated in western blot. Abcam now offers…
Cancer cell lines are originally derived from patient tumors, but acquire the ability to proliferate within in vitro cell cultures. As a result of in vitro manipulation, cell lines that have been traditionally used in cancer research undergo genetic transformations that are not restored when cells are allowed to grow in vivo.[9] Because of the cell culturing process, which includes enzymatic environments and centrifugation, cells that are better adapted to survive in culture are selected, tumor resident cells and proteins that interact with cancer cells are eliminated, and the culture becomes phenotypically homogeneous.[4] When implanted into immunodeficient mice, cell lines do not easily develop tumors and the result of any successfully grown tumor is a genetically divergent tumor unlike the heterogeneous patient tumor.[4] Researchers are beginning to attribute the reason that only 5% of anti-cancer agents are approved by the Food and Drug Administration after pre-clinical testing to the lack ...
Discover our worklow for the generation and culture of primary human tumor cell lines, and find out how to retain the primary tumors heterogeneity. - USA
HLDA WorkshopHCDM/HLDA 10Quantity100 testsVolume1.0 mLImmunogenDaudi human Burkitt lymphoma cell lineBackground InformationCD19 is a transmembrane gl…
HLDA WorkshopHCDM/HLDA 10Quantity100 testsVolume2.0 mLImmunogenDaudi human Burkitt lymphoma cell lineBackground InformationCD19 is a transmembrane gl…