BioAssay record AID 41661 submitted by ChEMBL: Beta-3 agonist efficacy in an adenylate cyclase assay performed on chinese hamster ovary cells transfected with human Beta-3 adrenergic receptor; Inactive.

TY - JOUR. T1 - Dietary D-allulose alters cholesterol metabolism in Golden Syrian hamsters partly by reducing serum PCSK9 levels. AU - Kanasaki, Akane. AU - Jiang, Zhe. AU - Mizokami, Takuya. AU - Shirouchi, Bungo. AU - Iida, Tetsuo. AU - Nagata, Yasuo. AU - Sato, Masao. PY - 2019/9/1. Y1 - 2019/9/1. N2 - D-Allulose, a C-3 epimer of D-fructose, is a rare sugar reported to be a non-caloric sweetener having several health beneficial effects including anti-hyperglycemia and anti-obesity. However, the impact of dietary D-allulose on cholesterol metabolism remains unclear. Therefore, we studied the effects of D-allulose on the cholesterol metabolism of Golden Syrian hamsters, an animal model with a lipid metabolism similar to that of humans. Hamsters received either normal diet (ND) or high-fat diet (HFD) with or without 3% D-allulose for 4 or 8 weeks. While there were no significant differences in total serum cholesterol levels between the groups, D-allulose significantly increased HDL-cholesterol ...

Monoclonal antibodies specific for epitopes on the perstussigen molecule, s-1, were developed by the Fetuin-ELISA test, radioimmunoassays and Western Blott(27). Hybridoma fluids already established for specificity on s-2, s-4 and the undigested molecule were exposed to pertussigen to detect the neutralization of agglutination to Chinese Hamster Ovary (CHO) cells. The results showed that no appreciable neutralization occurred. Many more monoclonals need to be developed and tested to find the critical epitope or epitopes which cause agglutination to CHO cells. This research may provide a clue to the specific antigenic site which causes toxicity attributed to whooping cough in humans ...

Phodopus campbelli is very small in size and the pelage is short and silky. The underside of the animal is covered in soft, buff, light grey fur and the dorsal portions, including the head, are woody brown in color. The underfur is quite short and is a dark slate grey. A defined charcoal stripe runs from between the ears to the tail. The pads of all digits, and the small tail, are covered in silky white fur. Additionally, Campbells hamsters, like other members of the subfamily Cricetinae, possess large internal cheek pouches that terminate above the scapula. Males are larger than females. (Thomas, 1905). Phodopus campbelli is often confused with Phodopus sungorus, Siberian hamsters. However, there are several physical characteristics that distinguish the two species. The ears of Phodopus campbelli are generally smaller than those of Phodopus sungorus. The mid-dorsal stripe of the Campbells hamster is both thin and defined and the area where the dorsal fur meets the ventral fur is a creamy ...

TY - JOUR. T1 - Effect of cholesterol feeding on DNA damage in male and female Syrian hamsters. AU - Turley, E. AU - Armstrong, NC. AU - Wallace, JMW. AU - Gilmore, WS. AU - McKelvey-Martin, VJ. AU - Allen, J. AU - Strain, JJ. PY - 1999/1. Y1 - 1999/1. N2 - Cholesterol oxides are cytotoxic and have been implicated in many disease processes; however, it has been proposed that cholesterol oxides result from cholesterol acting as a sacrificial antioxidant. In this study, the effect of dietary cholesterol on DNA damage, assessed by the alkaline comet assay, was examined in male and female Syrian hamsters. Animals were fed ad libitum a modified AIN-76 diet (control) or a diet with 0.5% cholesterol for 10 weeks. Following the 10-week feeding period, there was no significant difference in body weight between cholesterol-fed and control animals. Cholesterol feeding resulted in significant liver hypertrophy, and increased plasma total and HDL cholesterol in both male and female animals compared with ...

The role of polyamines in macromolecular synthesis has been studied using the synthesis of Semliki-Forest virus (SF virus) in normal and alpha-difluoromethylornithine-treated baby-hamster kidney (BHK21) cells as a model system. The activities of ornithine decarboxylase and S-adenosylmethionine decarboxylase, the rate-limiting enzymes in polyamine biosynthesis, decreased rapidly in mock- and SF-virus-infected cells, indicating that virus production in BHK21 cells was not dependent on polyamines formed after infection. A prolonged treatment of BHK21 cells with alpha-difluoro-methylornithine, a specific inhibitor of polyamine synthesis, resulted in a marked inhibition of the initial rate of virus production, which appeared 72 h after the beginning of the treatment. This inhibition was reversed by putrescine, spermidine and spermine, and at last partially by several other diamines and polyamine homologues. Polyamine-depletion also markedly reduced viral RNA polymerase activity in SF-virus infected ...

TY - JOUR. T1 - Genetic diversity of UV-sensitive DNA repair mutants of Chinese hamster ovary cells. AU - Thompson, L. H.. AU - Busch, D. B.. AU - Brookman, K.. AU - Mooney, C. L.. AU - Glaser, D. A.. PY - 1981. Y1 - 1981. N2 - Mutant lines of Chinese hamster ovary cells that show hypersensitivity to killing and mutagenesis by UV light were analyzed by genetic complementation analysis to determine whether defects in different gene loci might underlie a common cellular phenotype. To facilitate rapid screening of mutant clones, a procedure was devised that allowed presumptive complementation to be assessed on the basis of the frequency of UV-resistant cells after fusion by polyethylene glycol. Four classes were identified among 44 clones tested. By using drug-resistance markers for selection of hybrid cells in crosses between UV mutant and wild type, a mutant from each of the four classes was shown to behave as phenotypically recessive. Hybrids were also isolated from crosses between each of the ...

Human apolipoprotein (apo) A-I is secreted as a proprotein of 249 amino acids and is processed extracellularly to the mature form (243 amino acids) by removal of a six-residue propeptide segment. We have examined the role of the apoA-I propeptide in intracellular transport and secretion using transfected baby hamster kidney cells that secreted either proapoA-I (from the wild-type cDNA, A-Iwt) or mature-form apoA-I (from A-I delta pro, a cDNA in which the propeptide sequence was deleted). Deletion of the propeptide from the apoA-I sequence did not affect the rate of apoA-I synthesis, nor did it affect the fidelity of proteolytic removal of the prepeptide. However, the propeptide deletion caused mature-form apoA-I to accumulate within the cells as determined by pulse-chase experiments; the intracellular retention times for the mature-form apoA-I in which the propeptide was prematurely removed was three times longer than that of proapoA-I (t1/2 , 3 h compared with approximately 50 min). There was ...

Goat anti-Golden Syrian hamster IgG recognizes Golden Syrian hamster IgG whole molecule. This secondary antibody was purified using antigen affinity chromatography. The antibody is conjugated with Rhodamine. Golden Syrian hamster IgG whole molecule (PAB10592) - Products - Abnova

Rabbit anti-Golden Syrian hamster IgG recognizes Golden Syrian hamster IgG whole molecule. This secondary antibody was purified using antigen affinity chromatography. Golden Syrian hamster IgG whole molecule (PAB9233) - Products - Abnova

The effect of hyperosmolarity on transient recombinant protein production in Chinese hamster ovary (CHO) cells was investigated. Addition of 90 mM NaCl to the production medium ProCHO5 increased the volumetric yield of recombinant antibody up to 4-fold relative to transfection in ProCHO5 alone. Volumetric yields up to 50 mg l(-1) were achieved in a 6 day batch culture of 3 l. In addition, hyperosmolarity reduced cell growth and increased cell size. The addition of salt to cultures of transiently transfected CHO cells is a simple and cost-effective method to increase TGE yields in this host. Zhang, Xiaowei; Garcia, Isabel Fernandez; Baldi, Lucia; Hacker, David L.; Wurm, Florian M.

TY - JOUR. T1 - One-Step Enrichment of Intact Glycopeptides From Glycoengineered Chinese Hamster Ovary Cells. AU - Yang, Ganglong. AU - Höti, Naseruddin. AU - Chen, Shao Yung. AU - Zhou, Yangying. AU - Wang, Qiong. AU - Betenbaugh, Michael. AU - Zhang, Hui. PY - 2020/4/17. Y1 - 2020/4/17. N2 - Recently, the glycoproteomic analysis of intact glycopeptides has emerged as an effective approach to decipher the glycan modifications of glycoproteins at the site-specific level. A rapid method to enrich intact glycopeptides is essential for the analysis of glycoproteins, especially for biopharmaceutical proteins. In this study, we established a one-step method for the rapid capture of intact glycopeptides for analysis by mass spectrometry. Compared to the conventional sequential enrichment method, the one-step intact glycopeptide enrichment method reduced the sample preparation time and improved the detection of intact glycopeptides with long sequences or non-polar amino acids. Moreover, an increased ...

BioAssay record AID 4623 submitted by ChEMBL: Displacement of [3H]5-HT from human 5-hydroxytryptamine 1D receptor expressed in Chinese hamster ovary cells (CHO cells).

TY - CONF. T1 - Engineering amino acid supply pathways in Chinese hamster ovary cells. AU - Ley, Daniel. AU - Lund, Anne Mathilde. AU - Rank, Julie. AU - Kildegaard, Helene Faustrup. AU - Andersen, Mikael Rørdam. N1 - Conference code: 9. PY - 2014. Y1 - 2014. M3 - Poster. T2 - 9th Danish Conference on Biotechnology and Molecular Biology. Y2 - 22 May 2014 through 23 May 2014. ER - ...

Effects of granulocyte-macrophage colony stimulating factor produced in Chinese hamster ovary cells (regramostim), Escherichia coli (molgramostim) and yeast (sargramostim) on priming peripheral blood progenitor cells for use with autologous bone marrow after high-dose chemotherapy.

Download Caffeine-induced alterations in non-histone chromosomal proteins of Chinese hamster ovary cells ebook by Susan Claire HarrisonType: pdf, ePub, zip, txt

Adhering CHO cell culture - posted in Tissue and Cell Culture: Hi, I am totally new to CHO (chinese hamster ovary) cell culture, and to make things worse, I am in charge now of five different mutant CHO cell lines received by donation (4 day-travel and customs) . So the thing is that to not make mistakes I am growing them in a rich Hams F12 medium containing 10% FBS, pen-streptomycin, glutamine, and non essential amino-acids. They grow quite well according to their passage number,...

Drugs and materials. All drugs and chemicals were purchased from Sigma Chemical Co. (St. Louis, MO). Except for fetal bovine serum (FBS) that was from Gemini Bio-Products (Woodland, CA), media and reagents for tissue culture work and transfection were purchased from Life Technologies/Bethesda Research Laboratories (Grand Island, NY). DNase-free RNase and propidium iodide were purchased from Roche Molecular Biochemicals (Indianapolis, IN).. Cell cultures. The Chinese hamster ovary (CHO) xrs-6 and hamster Ku86 cDNA-complemented xrs-6+hamKu86 cells ( 14) were purchased from the European Collection of Cell Cultures (Wiltshire, United Kingdom). The Chinese hamster lung fibroblast XR-V15B cells ( 15) were purchased from the American Type Culture Collection (Manassas, VA). All cell lines were grown in HAMs F12 medium supplemented with 10% FBS, glutamate, penicillin, and streptomycin, in a humidified 37°C incubator at 5% CO2. The media for the xrs-6+hamKu86 and the four XR-V15B-transfectant sublines ...

Graham R, Bhatia H, Yoon S. Consequences of trace metal variability and supplementation on CHO cell culture performance: a review of key mechanisms and considerations. Biotechnol Bioeng. 2019 Aug 12 ...

The parent line of BHK-21(C-13) was derived from baby hamster kidneys of five unsexed, 1-day-old hamsters in March, 1961, by I.A. Macpherson and M.G.P. Stoker. Following 84 days of continuous cultivation, interrupted only by an 8-day preservation by freezing, clone 13 was initiated by single-cell isolation.

The parent line of BHK-21(C-13) was derived from baby hamster kidneys of five unsexed, 1-day-old hamsters in March, 1961, by I.A. Macpherson and M.G.P. Stoker. Following 84 days of continuous cultivation, interrupted only by an 8-day preservation by freezing, clone 13 was initiated by single-cell isolation.

Used for carcinoma cells, rat skeletal myoblasts, Chinese hamster lung cells, and rat, rabbit, and chicken embryos. Corning™ cellgro™ DMEM/Hams Medium F-12 Mix is based on Hams F-10 medium with increased concentrations of choline, inositol, putrescine, and several amino acids. X6 500 mL Hams F-12 Medium w L-glut ...

Phenotypic variations in the cells arise from changes in their DNA, including differences in methylation patterns. From analyzing CHO cell lines, researchers found that the transcriptome of each subclone also had a significant number of individual changes and that such changes indicate that epigenetic regulation is a hidden but important player in cell line development.

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Proteolytic processing of PA triggers partitioning of the anthrax toxin into lipid rafts. (A) Wild-type CHO cells were incubated for 1 h at 4°C with 500 ng/ml

We constructed comparative cytogenetic maps of the Chinese hamster to mouse, rat and human by fluorescence in-situ hybridization using 36 cDNA clones of mouse, rat, Syrian hamster, Chinese hamster and human functional genes. In this study, 30 out of the 36 genes were newly mapped to Chinese hamster …

Hybridoma technology is used to fuse fusion a B cell and myeloma to form a hybridoma that produces identical monoclonal antibodies.

Hybridoma technology is used to fuse fusion a B cell and myeloma to form a hybridoma that produces identical monoclonal antibodies.

MGAT1 adds N-acetylglucosamine to the Man5GlcNAc2 (Man5) structure. Goh et al. reported increased sialylation after restoring MGAT1 function in MGAT1 deficient CHO cells.

I am trying to determine the best dose of hygromycin that i can use to select my transfected colonies. (working with chinese hamster cell lines). I have tried several concentrations (from 50-250 microgram per ml) on my host cells and changing the media plus antibiotic every 1-2 days. Each time the media has turned yellow and lots of dead cells but still surviving colonies can be seen. How could we know if the cell death is because of the overgrowth of the culture and consequent bad condition or because of the antibiotic?. ...

First off, a VERY IMPORTANT NOTE. Mulder is a Roborovski hamster, which is the smallest of the dwarf hamsters. When Scully died, he weighed 22g, or 0.78oz; robos are usually less than 30g, or 1.06oz. Other dwarf hamsters are slightly larger, and can weigh up to 2.5oz. Syrian hamsters, on the other hand, usually weigh 5-7oz. This house is a little less than 450 square inches, which is a decent size for a dwarf hamster, but would be entirely too small for a Syrian hamster. If you need a house for a Syrian hamster, I highly recommend that you consider adapting these instructions for a much larger table, such as the Lack coffee table or two or more connected Lack side tables ...

SWISS-MODEL Repository entry for P86206 (CH60_MESAU), 60 kDa heat shock protein, mitochondrial. Mesocricetus auratus (Golden hamster)

Reaktivität: Huhn, Rind (Kuh), Hund and more. 370 verschiedene XRCC6 Antikörper vergleichen. Alle direkt auf antikörper-online bestellbar!

A research team at the Northeast Agricultural University in Harbin managed to breed three transgenic pigs by injecting fluorescent green protein and a bunch of other junk into embryonic pigs, said Professor Liu Zhonghua. Liu wore a fancy white lab coat and had multiple degrees adorning his walls, so we assume he must be pretty smart ...

Mammalian Cell Culture Fast Track Project commissioned, loop tuned, validated for initial startup Wrote and executed all FAT, validation protocols on site.

Syrian hamsters make for wonderful home pets if handled carefully. Their playful, cranky, and quirky personality attracts many pet owners. They demand little

Sigma-Aldrich offers abstracts and full-text articles by [Qiang Li, Xianghua Liu, Yanhua Wu, Jian An, Saiyin Hexige, Yichen Ling, Mingjun Zhang, Xianmei Yang, Long Yu].

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Shop a large selection of products and learn more about CD49b Hamster anti-Mouse, BB700, Clone: HMα2, BD Optibuild 50μg; BB700 50μg; BB700.

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name:조은석; Cho, Eun Suk; cho, eun suk; cho eun suk; eun suk cho; eun suk, cho; Cho, Eun Suk; Cho Eun Suk; Eun Suk Cho; Eun Suk, Cho

Sundaram, H., Strange, Philip G. (1994) Characterisation of the human brain serotonin 5-HT1A receptor expressed in Chinese Hamster Ovary cells. Biochemical Society Transactions, 22 (1). S75-S75. ISSN 0300-5127. (doi:10.1042/bst022075s) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) ...

Incubation of adriamycin resistant Chinese hamster lung cells with low levels of N-ethylmaleimide (NEM) results in a major increase in the cellular accumulation of drug. When resistant cells are prelabeled with [32Pi] and thereafter treated with NEM there also occurs a selective superphosphorylation of an 180K plasma membrane glycoprotein (P-180). This phosphorylation reaction occurs at both serine and threonine residues. In similar experiments with drug sensitive cells only minor levels of this protein can be detected. Detailed studies have established that in cells which have reverted to drug sensitivity there is a parallel loss in the presence of phosphorylated P-180. Also in cells which have undergone partial reversion to drug sensitivity there is a correlation between levels of superphosphorylated P-180 and adriamycin resistance. These results provide evidence that adriamycin resistance is dependent on the presence of P-180. The results also suggest that the biological activity of this protein is

In the last years, particular interest has been given to investigations concerning natural, effective and nontoxic compounds with radioprotective capacity in concert with increasing utilization of different types of ionizing radiation for various applications. Among them, propolis, a resinous mixture of substances collected by honey bees (Apis mellifera) has been considered promising since it presents several advantageous characteristics, i.e., anti-inflamatory, anticarcinogenic, antimicrobial and free-radical scavenging action. It is, therefore, a direct antioxidant that protects cells and organisms from the adverse effects of ionizing radiation. These relevant biological activities are mainly mediated by the flavonoids, present at relatively high concentrations in the propolis. Considering that the chemical composition and, consequently, the biological activity of propolis is variable according to the environmental plant ecology, the present study was conducted in order to evaluate the ...

Maurocalcine (MCa), initially identified from a Tunisian scorpion venom, defines a new member of the family of cell penetrating peptides by its ability to efficiently cross the plasma membrane. The initiating mechanistic step required for the cell translocation of a cell penetrating peptide implicates its binding onto cell surface components such as membrane lipids and/or heparan sulfate proteoglycans. Here we characterized the interaction of wild-type MCa and MCa K20A, a mutant analogue with reduced cell-penetration efficiency, with heparin (HP) and heparan sulfates (HS) through surface plasma resonance. HP and HS bind both to MCa, indicating that heparan sulfate proteoglycans may represent an important entry route of the peptide. This is confirmed by the fact that (i) both compounds bind with reduced affinity to MCa K20A and (ii) the cell penetration of wild-type or mutant MCa coupled to fluorescent streptavidin is reduced by about 50% in mutant Chinese hamster ovary cell lines lacking either all

Somatic Cell and Molecular Genetic Analysis of Various Chinese Hamster Ovary (CHO) Mutant Cells Defective in Sterol-dependent Regulation of Cholesterol Biosynthesis and LDL Receptor Expression A Thesis Submitted to the Faculty in partial fulfillment of the requirements for the degree of Doctor of Philosophy by Mazahir Tahir Hasan Dartmouth College and Dartmouth Medical school Hanover, New Hampshire April 1993 ...

Somatic Cell and Molecular Genetic Analysis of Various Chinese Hamster Ovary (CHO) Mutant Cells Defective in Sterol-dependent Regulation of Cholesterol Biosynthesis and LDL Receptor Expression A Thesis Submitted to the Faculty in partial fulfillment of the requirements for the degree of Doctor of Philosophy by Mazahir Tahir Hasan Dartmouth College and Dartmouth Medical school Hanover, New Hampshire April 1993 ...

We attempted to alter the inherited myocardial damage and loss of contractility of the cardiomyopathic Syrian hamster (strain U-MX7-1) by giving cardiac drugs that altered intracellular calcium and myocardial workload. Thirty-seven 21-day-old cardiomyopathic and thirty-seven 21-day-old normal hamsters were divided into five groups each: verapamil-, propranolol-, digoxin-, hydralazine-, and saline-injected. On their 90th day of life, the hamsters were killed. Of the five cardiomyopathic groups, only verapamil reduced myocardial damage. When both control and cardiomyopathic hamsters were treated with saline, digoxin, or propranolol, the cardiomyopathic hamsters had significantly less contractile force, maximal rate of force development, and maximum velocity of unloaded shortening. When both groups were treated with verapamil or hydralazine, there were no significant group differences in the indices of contractility. However, when saline-treated cardiomyopathic hamsters were compared with ...

Chinese hamster ovary (CHO) cells are an epithelial cell line derived from the ovary of the Chinese hamster, often used in biological and medical research and commercially in the production of therapeutic proteins. They have found wide use in studies of genetics, toxicity screening, nutrition and gene expression, particularly to express recombinant proteins. CHO cells are the most commonly used mammalian hosts for industrial production of recombinant protein therapeutics. The Chinese hamster had been used in research since 1919 where they were used in place of mice for typing pneumococci. They were subsequently found to be excellent vectors for transmission of kala-azar (a.k.a. visceral leishmaniasis), facilitating leishmania research. In 1948, the Chinese hamster was first used in the United States for breeding in research laboratories. In 1957, Theodore T. Puck obtained a female Chinese hamster from Dr. George Yerganians laboratory at the Boston Cancer Research Foundation and used it to ...

BioMed Research International is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies covering a wide range of subjects in life sciences and medicine. The journal is divided into 55 subject areas.

Kukkonen JP; G-protein-dependency of orexin/hypocretin receptor signalling in recombinant Chinese hamster ovary cells.; Biochem Biophys Res Commun, 2016 PubMed Europe PMC Scholia ...

Kukkonen JP; G-protein-dependency of orexin/hypocretin receptor signalling in recombinant Chinese hamster ovary cells.; Biochem Biophys Res Commun, 2016 PubMed Europe PMC ...

Endothelin-1 (ET-1) is produced by endothelial cells and can stimulate either the ETa or the ETB receptors. The role o f ET-1 and the identity of the endothelin receptors involved in mediating tone in the mesenteric small veins of the Golden Syrian hamster are not known. ET-1 induces venoconstriction, thereby increasing the preload to the heart in congestive heart failure. However, mechanisms mediating contraction to ET-1 in the mesenteric small veins of the cardiomyopathic hamsters in the early and late stages of CHF are not known. Therefore, mechanisms mediating ET-1 induced contraction were determined in the mesenteric small veins o f the Golden Syrian and cardiomyopathic hamsters in the early and late stages of CHF. Baseline intraluminal diameter of small veins was measured before and after treatment with either ETa or ETB receptor antagonists. ET-1 induced contraction was higher in the early stage o f CHF, while it was decreased in the late stage of CHF. Blockade of the ETA receptor ...

6. Nunberg, JH, Kaufman, RJ, Schimke, RT, Urlaub, G. & Chasin, LA Amplified dihydrofolate reductase genes localized to a homogeneous staining region of a single chromosome in a methotrexate-resistant Chinese hamster ovary cell line. Proc. Natal Akad. Science. America 75, 5553-5556 (1978).. ADS CAS published article as Central Google Scholar ...

To rapidly produce large amounts of recombinant proteins, the generation of stable Chinese Hamster Ovary (CHO) cell pools represents a useful alternative to large-scale transient gene expression (TGE). We have developed a cell line (CHO(BRI/rcTA)) allowing the inducible expression of recombinant proteins, based on the cumate gene switch. After the identification of optimal plasmid DNA topology (supercoiled vs linearized plasmid) for PEIpro™ mediated transfection and of optimal conditions for methionine sulfoximine (MSX) selection, we were able to generate CHO(BRI/rcTA) pools producing high levels of recombinant proteins. Volumetric productivities of up to 900mg/L were reproducibly achieved for a Fc fusion protein and up to 350mg/L for an antibody after 14days post-induction in non-optimized fed-batch cultures. In addition, we show that CHO pool volumetric productivities are not affected by a freeze-thaw cycle or following maintenance in culture for over one month in the presence of MSX. ...

Following treatment of Syrian hamster embryo cells with benzo(a)pyrene, the time required for the expression of enhanced fibrinolytic activity was examined. For this study, the fibrin-agarose overlay method was developed to distinguish the activity of normal and transformed colonies of hamster cells. Colonies possessing enhanced fibrinolytic activity were not observed 8 days after treatment, but they were observed following one passage (2 weeks after treatment). Morphologically transformed colonies, which exhibited no enhanced fibrinolytic activity, were observed 8 days following treatment. In contrast to these two early changes, cells capable of growth in soft agar were observed much later (6 to 8 weeks after treatment). Untreated Syrian hamster embryo cells generally senesced and did not exhibit enhanced fibrinolytic activity. Approximately 1 of 10 untreated cultures escaped senescence and evolved as a continuous cell line; such cultures frequently exhibited enhanced fibrinolytic activity. ...

The development of receptor-defective or -deficient mutants can be applied to the investigation of cell-matrix interactions including cell adherence and spreading. In the present study we developed a series of ethyl methyl sulfonate (EMS)-induced Chinese hamster ovary (CHO) cell mutants, which adhere to fibronectin but have impaired spreading characteristics. Using morphometric analysis, a significant suppression in the degree of cell spreading between the wild-type and the mutant cells (P less than 0.001) was seen. This inability of the mutant cells to spread adequately on fibronectin also resulted in a decreased number and diameter of stress fibers as compared to wild-type cells. The decreased cell spreading of the mutant cells was not due to inherent differences in cell size or volume, as determined by fluorescence-activated cell sorter (FACS) analysis. Since integrins, specifically the fibronectin receptor (alpha FN/beta 1), are important in cell adhesion and cell spreading, we carried out a ...

Using the cultured Chinese hamster cell line Don, G1 or S or a mixture of late-S/G2 cells were prepared by release from metaphase arrest. Metaphase (M) cells were also obtained by mitotic arrest of log-phase cultures with Colcemid and held in metaphase; such M cells remained untreated with any other compound and were termed standard M cells. When interphase (I) cells were fused at pH 8.0 and 37 degrees C with standard cells in the presence of Colcemid by means of UV-inactivated Sendai virus, binucleate interphase-metaphase (I-M) cells were obtained. In a given I-M cell there occurred within 30 min after fusion either prophasing of the I nucleus or formation of a nuclear envelope (NE) around the chromosomes. About 20% of early G1 cells, 35% of cells at the G1/S boundary, 50% of S cells, and 70% of late S/G2 cells could induce NE formation. If, before fusion, cycloheximide (CHE), an inhibitor of protein synthesis, was present during release from M arrest, the cells entered G1 but not S. About 20% ...

To help the researchers and pharmaceutical partners with discovering the most effective therapeutic glycoprotein, Creative Biolabs provides solutions on glycosylation, the most widely applied posttranslational modification (PTM) approach to change protein function and measure the recombinant biopharmaceutical immunogenicity. Based upon the efficient glycoengineered expression platforms (glyco-engineered mammalian cell expression system, glyco-engineered pichia pastoris expression system, and glyco-engineered plant-based expression system), Creative Biolabs is fully competent to handle the requests of therapeutic glycoprotein development and glycoengineering of antibody/cell line.. Creative Biolabs has updated the generally applied mammalian cell expression with glyco-engineered Chinese hamster ovary (CHO) cells and glyco-engineered human embryonic kidney 293 (HEK293) cells for glycoprotein production, which can guarantee the natural folding and sugar chain composition of glycoprotein, and ...

Previous studies in our laboratory have demonstrated intracerebroventricular (ICV) self-administration of testosterone in hamsters. This suggests that androgens are reinforcing, independent of their anabolic effects. Furthermore, pharmacologic testosterone acts as a depressant: ICV testosterone infu …

Normal Hamster (Syrian) control serum (non-immunized) Mixed breed serum GC-NGHS-5 Normal Hamster (Syrian) control serum (non-immunized) Mixed breed serum GC-NGHS-5

BGI, the giant genomics institute located in Shenzhen, and GT Life Sciences of San Diego have published their collaborative study on the genomic sequence of the Chinese hamster ovary (CHO) K1 cell line in Nature Biotechnology. Over 70% of the recombinant therapeutic proteins sold today are manufactured using mammalian cells, primarily CHO cell lines. GT Life Sciences uses a metabolic modeling platform to design new products and processes for the life sciences field. It says a better understanding of the genome will speed development of new recombinant protein therapies. More details.... Share this with colleagues:   var switchTo5x=true;stLight.options({publisher:d7871f5b-67bc-4d30-b66f-1465d0b97213});

We have investigated the role of HIF-1 in the cellular response to redox modulation via the inhibition of oxidative phosphorylation. We demonstrate that manipulation of redox in air, achieved by inhibiting cytochrome oxidase with cyanide, induces HIF-1 mediated transcription in wild-type CHO and HT1080 human tumour cells but not in CHO cells deficient in the oxygen responsive, HIF-1alpha sub-unit of HIF-1. Hypoglycaemia attenuates cyanide-mediated transcription in non-transformed HIF-1 wild-type CHO cells but not the human tumour derived cell line. Cells lacking either HIF-1alpha, or the second composite sub-unit of HIF-1, HIF-1beta, were markedly more sensitive to the combined stress of perturbed redox and hypoglycaemia than wild-type cells. As such conditions together with hypoxia are prevalent in tumours, these data suggest that HIF-1 may have a protective role in adaptation to the tumour micro-environment. In support of this we demonstrate that HIF-1alpha deficient cells are less tumorigenic than

We have investigated the role of HIF-1 in the cellular response to redox modulation via the inhibition of oxidative phosphorylation. We demonstrate that manipulation of redox in air, achieved by inhibiting cytochrome oxidase with cyanide, induces HIF-1 mediated transcription in wild-type CHO and HT1080 human tumour cells but not in CHO cells deficient in the oxygen responsive, HIF-1alpha sub-unit of HIF-1. Hypoglycaemia attenuates cyanide-mediated transcription in non-transformed HIF-1 wild-type CHO cells but not the human tumour derived cell line. Cells lacking either HIF-1alpha, or the second composite sub-unit of HIF-1, HIF-1beta, were markedly more sensitive to the combined stress of perturbed redox and hypoglycaemia than wild-type cells. As such conditions together with hypoxia are prevalent in tumours, these data suggest that HIF-1 may have a protective role in adaptation to the tumour micro-environment. In support of this we demonstrate that HIF-1alpha deficient cells are less tumorigenic ...

This study shows that the increase in blood pressure triggered by Ang II infusion can be completely prevented by the administration of soluble human rACE2. We used a highly purified soluble human rACE2 produced in the Chinese hamster ovary cell line, which has a calculated half-life in vivo of 8.5 hours (please see the supplementary Methods section). Our protocols involved acute studies in anesthetized animals and studies where rACE2 was given by osmotic minipumps for 3 days to conscious animals. Studies of long duration with human rACE2 administration were precluded because we found that mouse antihuman rACE2 antibodies developed over time, and this resulted in a decrease in serum ACE2 activity despite continued rACE2 infusion (please see the supplementary Results section).. As expected from the known effect of ACE2 on Ang II,2,3 human rACE2 was shown in vitro to cleave a single amino acid phenylalanine from Ang II, which led to the formation of Ang-(1-7). Recombinant ACE2 also acted on Ang I ...

Sou SN, Lee K, Nayyar K, Polizzi KM, Sellick C, Kontoravdi Cet al., 2017, Exploring cellular behavior under transient gene expression and its impact on mAb productivity and Fc-glycosylation., Biotechnol Bioeng Transient gene expression (TGE) is a methodology employed in bioprocessing for the fast provision of recombinant protein material. Mild hypothermia is often introduced to overcome the low yield typically achieved with TGE and improve specific protein productivity. It is therefore of interest to examine the impact of mild hypothermic temperatures on both the yield and quality of transiently expressed proteins and the relationship to changes in cellular processes and metabolism. In this study, we focus on the ability of a Chinese hamster ovary cell line to galactosylate a recombinant monoclonal antibody (mAb) product. Through experimentation and flux balance analysis, our results show that TGE in mild hypothermic conditions led to a 76% increase in qP compared to TGE at 36.5°C in our ...

Competes with and mimic the effects of opiate drugs. They play a role in a number of physiologic functions, including pain perception and responses to stress.

Glenmark signs full commercial-use license for Horizons gene-edited CHO cells Cambridge, UK, 30 September 2019: Horizon Discovery Group plc (LSE: HZD) (Horizon), a global leader in the application of gene editing and gene modulation for cell line engineering, today announced the full commercial licensing to Glenmark Pharmaceuticals, a global innovative pharmaceutical company, of its gene-edited Glutamine Synthetase (GS) knockout Chinese Hamster Ovary (CHO) K1 cell line. Terms of the agreement were based on stringent evaluation of the cell line by Glenmark to assess its suitability for adoption into the Companys biomanufacturing processes. Martin Bertschinger, Deputy Director of Cell Sciences, Glenmark, explained: After extensive evaluation, Horizons GS knockout CHO K1 cell line demonstrated consistently impressive performance. We generated clones with high levels of productivity and a favorable stability profile relative to our previous system. Incorporating this technology into our ...

Compare X-ray repair complementing defective repair in Chinese hamster cells 6 Biomolecules from Aviva Systems Biology from leading suppliers on Biocompare. View specifications, prices, citations, reviews, and more.

Previous work on the early development of the golden hamster includes the investigation of Ochs (1908), Graves (1945) and Ward (1948), all at the level of the light microscope. Austin (1963) has examined the ultrastructure of the oocytes of the golden hamster while Enders & Schlafke (1965) have observed the pre-implantation stages of pregnancy.. The ultrastructure of implantation has been studied in two other species of myomorph rodents: the mouse (Potts, 1966a; Reinius, 1967) and the rat (Enders & Schlafke, 1967).. Implantation is taken as beginning when the zona pellucida is lost and the trophoblast is in contact with the uterine epithelium throughout its circumference. This takes place at between 80-100 h post coitum. Previous studies have been made on specimens embedded in paraffin, and the shrinkage which occurs with this method of preservation has caused implantation to appear to begin considerably later than this:Graves (1945) gives it as beginning at 5 days, Ward(1948) as 4 days 8 ...

Our stuffed guinea pigs and stuffed hamsters are squeak-tacular! Lets face it, a plush guinea pig and a plush hamster have one huge advantage over a real guinea pig or hamster; no cage. No cage means no cleaning and no odor when the cleaning gets put off

Feichtinger J., Hernandez I., Fischer C., Hanscho M., Auer N., Hackl M., Jadhav V., Baumann M., Krempl P.M., Schmidl C., Farlik M., Schuster M., Merkel A., Sommer A., Heath S., Rico D., Bock C., Thallinger G.G., Borth N. (2016) Comprehensive genome and epigenome characterization of CHO cells in response to evolutionary pressures and over time. Biotechn. Bioeng. 113:10:2241-2253. DOI: 10.1002/bit.25990. Gludovacz E., Maresch D., Bonta M., Szöllösi H., Furtmüller P.G., Weik R., Altmann F., Limbeck A., Borth N., Jilma B., Boehm T. (2016) Characterization of recombinant human diamine oxidase (rhDAO) produced in Chinese Hamster Ovary cells. J Biotechnol. 227, 120-130. Klanert G., Jadhav V., Shanmukam V., Diendorfer A.m Karbiener M., Scheideler M., Bort JH., Grillari J., Hackl M., Borth N. (2016) A signature of 12 microRNAs is robustly associated with growth rate in a variety of CHO cell lines. J Biotechnol. DOI 10.1016/j.jiotec.2016.03.022. Priola J.J., Calzadilla N., Baumann M., Borth N., Tate ...

There are now several examples of single G protein-coupled receptors to which binding of specific agonists causes differential effects on the associated signaling pathways. The dopamine D2 receptor is of special importance because the selective activation of functional pathways has been shown both in vitro and in situ.

Matthew D Johnson is the author of this article in the Journal of Visualized Experiments: Measuring In Vivo Changes in Extracellular Neurotransmitters During Naturally Rewarding Behaviors in Female Syrian Hamsters

Photoporation is a rapidly expanding technique for the introduction of macromolecules into single cells. However, there remains no study into the true efficiency of this procedure. Here, we present a detailed analysis of transfection efficiency and cell viability for femtosecond optical transfection using a titanium sapphire laser at 800 nm. Photoporation of 4000 Chinese Hamster ovary cells was performed, representing the largest optical transfection study reported to date. We have investigated a range of laser fluences at the cell membrane and, at 1.2 μJ/cm2, have found an average transfection efficiency of 50 ± 10%. Contrary to recent literature, in which 100% efficiency is claimed, our measure of efficiency accounts for all irradiated cells, including those lost as a result of laser treatment, thereby providing a true biological measure of the technique.. ©2006 Optical Society of America. Full Article , PDF Article ...

File Title: The patterns of development and distribution of collagen, reticulin, and elastin in the placentae of the golden hamster (Mesocricetus auratus Waterhouse ...

Identification and quantitation of vesivirus 2117 particles in bioreactor fluids from infected Chinese hamster ovary cell cultures.

iHOP - Information Hyperlinked over Proteins. iHOP provides the network of genes and proteins as a natural way of accessing the millions of abstracts in PubMed. By employing genes and proteins as hyperlinks between sentences and abstracts, the information in PubMed becomes bound together into one navigable resource. A Gene Network for Navigating the Literature, Nature Genetics 36, 664 (2004). www.ihop-net.org/UniPub/iHOP/

Djungarian hamsters, or as them still name, drugarice, is one of the most popular breeds rodents for home maintenance and taming.

|ul| |li| CELLine AD 1000 Bioreactor Flask for high density adherent cell culture. |/li| |li| 1000ml media compartment 15 ml cell growth compartment for antibody and protein production. |/li| |li| Use with Hybridoma, Insect, CHO, NSO, HEK, BHK cell lines

|ul| |li| CELLine AD 1000 Bioreactor Flask for high density adherent cell culture. |/li| |li| 1000ml media compartment 15 ml cell growth compartment for antibody and protein production. |/li| |li| Use with Hybridoma, Insect, CHO, NSO, HEK, BHK cell lines

There is no consensus as to whether NA activates the influx of extracellular Ca2+ influx in CHO-α1A, CHO-α1B, and CHO-α1D (Perez et al., 1993; Horie et al., 1995). Based on the results of the present study, we conclude that NA induces Ca2+ influx in CHO-α1A, CHO-α1B, and CHO-α1D (Figs. 1 and 4). Moreover, the magnitude of the transient increase and that of the sustained increase in [Ca2+]i were similar in all three cell types (Figs. 1 and 2). These results differ from the previous observation that the level of the NA-induced sustained increase in [Ca2+]i in CHO-α1D was smaller than that in CHO-α1A or CHO-α1B(Horie et al., 1995). However, this report showed that NA induced sustained increase in [Ca2+]i even in the absence of extracellular Ca2+ in CHO-α1A or CHO-α1B(Horie et al., 1995). Therefore, we have doubts about their data on monitoring of NA-induced increase in [Ca2+]i.. Because previous reports did not describe what types of Ca2+ channels are activated by NA in CHO-α1A, ...

Dulbeccos Modified Eagle Medium:Nutrient Mixture F-12 (DMEM / F-12) is a widely used basal medium for supporting the growth of many different mammalian cells. Cells successfully cultured in DMEM / F-12 include MDCK, glial cells, fibroblasts, human endothelial cells, and rat fibroblasts. Creative Bioarray offers a variety of DMEM / F-12 modifications for a range of cell culture applications ...

Pakistan conferred its top civilian award, the Nishan-e-Pakistan on Chinese President Xi Jinping on Tuesday, for his outstanding contribution in the promotion of the relationship between the two countries.