PFOS induces Sertoli cell injury using testicular cells isolated from rodent testes, but it remains unknown if PFOS has similar effects in humans. Herein, we maintained human Sertoli cells in a mitotically active state in vitro, thus enabling transfection experiments that altered gene expression to explore the molecular mechanism(s) underlying toxicant-induced cell injury. Human Sertoli cells obtained from men at ages 15, 23, 36 and 40 were cultured in vitro. These differentiated Sertoli cells remained mitotically active when cultured in the presence of 10% FBS (fetal bovine serum), with a replication time of ~1-3 weeks. At ~80% confluency, they were used for studies including toxicant exposure, immunoblotting, immunofluorescence analysis, tight junction (TJ)-permeability assessment, and overexpression of BTB (blood-testis barrier) regulatory genes such as FAK and its phosphomimetic mutants. PFOS was found to induce Sertoli cell injury through disruptive effects on actin microfilaments and ...
In the present study we examined the capacity of interleukin-1 (IL-1) α, β, interleukin-1 receptor antagonist (IL-1ra) and follicle stimulating hormone (FSH) to induce transferrin secretion by Sertoli cells under in vitro conditions. Primary Sertoli cell (SC) cultures from immature mice secreted constitutively transferrin. Stimulation of these cultures with IL-1α, IL-1β significantly increas\d their capacity to secrete transferrin. Addition of IL-1ra to unstimulated SC cultures did not affect their capacity to secrete transferrin. Stimulation of SC cultures with a combination of both IL-1α and FSH or IL-1β and FSH showed additive effect between IL-1 and FSH in their capacity to induce transferrin secretion by these cells. However, stimulation of Sertoli cells with a combination of both IL-1ra and FSH did not affect their capacity to secrete transferrin compared with FSH-stimulated cultures. Our results may suggest the involvement of testicular paracrine/autocrine factors (IL-1) and ...
Introduction: Sertoli cells support germ cell development in the testis via an elaborate network of cell junctions that confers structural, communicating, and signaling support. However, Sertoli cell junctions and cytoskeletons are the target of environmental toxicants. Because germ cells rely on Sertoli cells for the provision of structural/functional/nutritional support, exposure of males to toxicants leads to germ cell exfoliation due to Sertoli cell injuries. Interestingly, the molecular mechanism(s) by which toxicants induce cytoskeletal disruption that leads to germ cell exfoliation is unclear, until recent years, which are discussed herein. This information can possibly be used to therapeutically manage toxicant-induced infertility/subfertility in human males. Areas covered: In this review, we provide a brief update on the use of Sertoli cell system developed for rodents and humans in vitro, which can be deployed in any research laboratory with minimal upfront setup costs. These systems can be
recpmid,pmid=14709891,ti=Phagocytic removal of apoptotic spermatogenic cells by Sertoli cells: mechanisms and consequences ,au=Nakanishi Y; Shiratsuchi A,so=Biol Pharm Bull 2004; 27 (1): 13-6,ab=More than half of differentiating spermatogenic cells undergo apoptosis before maturing into spermatozoa during mammalian spermatogenesis. These cells are selectively and rapidly eliminated through phagocytosis by Sertoli cells, a testicular somatic cell type possessing phagocytic activity. We have investigated the mechanism by which Sertoli cells specifically recognize and phagocytose apoptotic spermatogenic cells and the consequences of phagocytosis. We showed by in vitro as well as in vivo analyses that Sertoli cells recognize apoptotic spermatogenic cells through the binding of their surface receptor, class B scavenger receptor type I, to phosphatidylserine that is expressed on the surface of spermatogenic cells during apoptosis. The inhibition of phagocytosis in live animals resulted in a decrease ...
The ultrastructure of Sertoli-Sertoli and Sertoli-germ cell surface specializations in the domestic fowl was studied in material fixed by vascular perfusion through the thoracic aorta. Three main types of surface specializations were found between adjacent Sertoli cells. These are focal tight junctions, desmosome-like devices, and a specialization characterized by the presence of long and dilated subsurface cisternae of rough endoplasmic reticulum. Typical inter-Sertoli cell junctions similar to those of mammals were absent. Germ cells were attached to Sertoli cells mainly by desmosome-like devices of varying appearance. The junctions between Sertoli cells and elongating or elongated spermatids, the mantle, consisted of only slight condensations of filamentous material in the Sertoli cell. The tight junctions between adjacent Sertoli cells were efficient in preventing lanthanum from passing towards the lumen beyond the level of the spermatogonia.
TY - JOUR. T1 - Anandamide activity and degradation are regulated by early postnatal aging and follicle-stimulating hormone in mouse Sertoli cells. AU - Maccarrone, Mauro. AU - Cecconi, Sandra. AU - Rossi, Gianna. AU - Battista, Natalia. AU - Pauselli, Riccardo. AU - Finazzi-Agrò, Alessandro. PY - 2003/1/1. Y1 - 2003/1/1. N2 - Anandamide (AEA), a prominent member of the endogenous ligands of cannabinoid receptors (endocannabinoids), is known to adversely affect female fertility. However, a potential role of AEA in male reproductive functions is unknown. Here we report evidence that immature mouse Sertoli cells have the biochemical tools to bind and inactivate AEA, i.e. a functional type-2 cannabinoid receptor (CB2R), a selective AEA membrane transporter, and an AEA-degrading enzyme fatty acid amide hydrolase. We show that, unlike CB2R, the activity of AEA membrane transporter and the activity and expression of FAAH decrease, whereas the apoptosis-inducing activity of AEA increases with age ...
Abstract The final number of Sertoli cells reached during the proliferative periods determines sperm production capacity in adulthood. It is well known that FSH increases the rate of proliferation of Sertoli cells; however, little is known about the transcription factors that are activated by the h...
NLRP3 in somatic non-immune cells of rodent and primate testes NLRP3 is part of the NLRP3 inflammasome and a global sensor of cellular damage. It was recently discovered in rodent Sertoli cells. We investigated NLRP3 in mouse, human and non-human primate (marmoset and rhesus macaque) testes, employing immunohistochemistry. Sertoli cells of all species expressed NLRP3, and the expression preceded puberty. In addition, peritubular cells of the adult human testes expressed NLRP3. NLRP3 and associated genes (PYCARD, CASP1, IL1B) were also found in isolated human testicular peritubular cells and the mouse Sertoli cell line TM4. Male infertility due to impairments of spermatogenesis may be related to sterile inflammatory events. We observed that the expression of NLRP3 was altered in the testes of patients suffering from mixed atrophy syndrome, in which tubules with impairments of spermatogenesis showed prominent NLRP3 staining. In order to explore a possible role of NLRP3 in male infertility, ...
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The regulation of early fetal germ cell growth has not been studied in cell culture, probably due to the poor survival of these cells. However, cell culture is the only system in which the control of cell growth can be studied independently of the influence of secreted testicular factors, which are diluted in the medium. We successfully cultured dispersed testicular cells from 16.5-day-old rat fetuses in defined medium and compared the growth of these cells with that of cells from 3-day-old neonates. In this system, fetal gonocytes displayed low levels of mitotic activity and their numbers remained stable. In contrast, neonatal gonocytes displayed high levels of mitotic activity and increased in number, these characteristics resembling those observed in vivo. We found that retinoic acid had deleterious effects on the number of gonocytes but did not affect Sertoli cell proliferation in fetal and neonatal cell cultures. Moreover, in fetal cell cultures, the decrease in the number of gonocytes resulted
A method is described for obtaining populations of viable Sertoli cells from rat testes. Minced whole testes from rats of 15 to 29 days of age are sequentially treated with collagenase and pancreatin. The resulting suspension of cells is sedimented t
Wilhelm D., Martinson F., Bradford S., Wilson M.J., Combes A.N., Beverdam A., Bowles J., Mizusaki H., Koopman P.. We have raised an antibody specifically recognizing endogenous mouse SRY protein and used it to investigate the molecular and cellular mode of action of SRY in testis determination. We find that expression of SRY protein closely mirrors the expression of Sry mRNA in mouse genital ridges and is detectable for 6 to 8 h after the mRNA ceases to be detectable. The subset of somatic cells that expresses SRY begins to express SOX9 almost immediately. Since these SOX9-positive cells go on to develop as Sertoli cells, it appears that SRY expression marks the pre-Sertoli cell lineage and leads to up-regulation of Sox9 expression cell-autonomously. However, a small proportion of SOX9-positive cells did not appear to express SRY, possibly reflecting the additional involvement of paracrine signaling in activating Sox9 transcription in these cells. We confirmed by ex vivo cell mixing experiments ...
Many genes are essential for early development and, as their inactivation leads to early embryonic lethality, this precludes further investigation of their functions in late embryonic and postnatal development. The cKO strategy overcomes this obstacle and allows for dissection of gene function in a cell lineage-specific and temporally controlled fashion. In this study, we employed an SC-specific Cre line (i.e. Amh-Cre) to inactivate Upf2 exclusively in SCs at ∼E12.5 so that the role of Upf2 in SC development could be delineated. The dual-fluorescent reporter (Rosa26mTmG) line allows for easy and convenient determination of the onset of Cre activity when crossed with a specific Cre deletor line (Wu et al., 2012). Using this method, we detected Cre activity in Amh-Cre males at ∼E12.5, which is ∼2 days earlier than in an alternative Amh-Cre line (∼E14.5) (Gao et al., 2006; Kim et al., 2010). At E12.5, SC specification has completed and the testis cord has just become morphologically ...
Sigma-Aldrich offers abstracts and full-text articles by [Li-Chen Ge, Zhuo-Jia Chen, Hao Liu, Kun-Shui Zhang, Qiao Su, Xiang-Yu Ma, Hong-Bin Huang, Zhen-Dong Zhao, Yu-Ye Wang, John P Giesy, Jun Du, Hong-Sheng Wang].
Sertoli Cell Biology, Second Edition summarizes the progress since the last edition and emphasizes the new information available on Sertoli/germ cell interactions....
Testis: Macrophage-Leydig cell functional interaction Sertoli cell-germ cell functional interaction Action and regulation of B cell translocation gene 1 in the seminiferous epithelium General: Infertility Mechanism of fertilization Mechanism of embryo implantation
Sertoli cell is associated with developing germ cells in seminiferous tubule of the testis.. These cells protect the developing sperm besides maintaining, nourishing, and regulating the process of spermatogenesis (process by which male gametes form).. Process of Spermatogenesis : diploid spermatogonium (undifferentiated male germ cell) , spermatocyte , spermatid (immature male sex cell) , mature sperm ...
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Bisphenol A (BPA), which has previously been shown to have estrogenic activity, was examined for its effect on spermatogenesis in offspring of mice that had been exposed to BPA during gestation. BPA (0, 1, 10, or 100 mg/kg body weight) was orally administered to pregnant mice from the 10th to the 17th day of gestation, and testes of 60- and 120-day-old male offspring were removed and processed for histological analysis. The results demonstrate that prenatal exposure to BPA brings about histopathological changes in the seminiferous epithelium of testes in mouse offspring, such as loss of the luminal space of the seminiferous tubules, accumulation of amorphous material in the tubes, reduction in the number of maturating elongate spermatids, and an aberrant distribution of spermatogenic cells within the epithelium. Electron microscopy suggested that disturbed spermiogenesis is one of the reasons for the reduction in the number of elongate spermatids, and that degeneration of somatic Sertoli cells ...
Regulation of Sertoli cell and germ cell differentation. Animals; Cell Differentiation/physiology*; Germ Cells/cytology; Germ Cells/physiology*; Germinoma/.
Transmission electron micrographs showing the unusual nucleolar structures in Sertoli cells of ruminants, with varying numbers of vesicles and tubules...
A major gonadotropin secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). Follicle-stimulating hormone stimulates GAMETOGENESIS and the supporting cells such as the ovarian GRANULOSA CELLS, the testicular SERTOLI CELLS, and LEYDIG CELLS. FSH consists of two noncovalently linked subunits, alpha and beta. Within a species, the alpha subunit is common in the three pituitary glycoprotein hormones (TSH, LH, and FSH), but the beta subunit is unique and confers its biological specificity ...
Intriguingly, effects of irradiation on the morphology of Sertoli cells were found in eight monkeys. Possibly, irradiation at the time these cells were not yet terminally differentiated and still proliferating, and/or the abnormal hormone levels induced by the disappearance of most of the germ cells, altered some of the Sertoli cells. The appearance of these aberrant cells was hyperplastic-like, but no evidence for tumor formation was seen.. In rodent studies, no effects of irradiation on tubular width and Sertoli cell morphology have been reported. Unlike in the LBNF1 rat, no arrest of spermatogenesis was seen in the monkey, because the repopulated tubules generally showed full spermatogenesis. However, the present study was carried out at a very long time after irradiation, and a transient disturbance in spermatogenesis at an earlier interval after irradiation may have taken place.. The nonaffected concentrations of testosterone indicate that Leydig cell function in the monkeys was not ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
BACKGROUND. In women with obesity, excess gestational weight gain (≥270 g/week) occurs in two out of three pregnancies and contributes to metabolic impairments in both mother and baby. To improve obstetrical care, objectively assessed information on energy balance is urgently needed. The objective of this study was to characterize determinants of gestational weight gain in women with obesity. METHODS. This was a prospective, observational study of pregnant women with obesity. The primary outcome was energy intake calculated by the energy intake-balance method. Energy expenditure was measured by doubly-labeled water and whole-room indirect calorimetry and body composition as 3-compartment model by air displacement plethysmography and isotope dilution in early (13-16 weeks) and late pregnancy (35-37 weeks). RESULTS. In pregnant women with obesity (n=54), recommended weight gain (n=8, 15%) during the second and third trimesters was achieved when energy intake was 125±52 kcal/d less than energy ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered. Nonsequestered MCGA (NS-MGCA) egressed from normal tubules, as evidenced by their ability to interact with systemically injected antibodies and form localized immune complexes outside the Sertoli cell barrier. NS-MGCA derived from cell fragments that were discarded by spermatids during spermiation. They egressed as cargo in residual bodies and maintained Treg-dependent physiological tolerance. In contrast, sequestered MGCA (S-MGCA) were undetectable in residual bodies and ...
My my story starts by my DH and I not conceiving in the 11 years we have been together and the 1 year we have actually been actively ttc. It has officially been almost 5 months of testing between my DH and I. All my tests came back great - page 4
Schimenti, Kerry J et al. "Akap9 Is Essential For Spermatogenesis And Sertoli Cell Maturation In Mice.". Genetics 194.2 (2013): 447-57. Web. Genetics ...
Unwanted childlessness affects approximately one in six couples worldwide. Although the exact proportion of the predominant cause of the problem remains controversial, according to the World Health Organization, in nearly 40 % of cases the cause can be attributed to the female, in 20 % to the male, in 25 % to both, and in 15 % the cause remains unknown. Based on these figures, the incidence of male factor infertility in the general population is approximately 7 %. The majority of these men, approximately 30 %, experience irreversible idiopathic infertility and cannot father children without some form of medical intervention ...
The synthesis of androgen-binding protein by cultured Sertoli cells is increased by insulin, retinol, follitropin and testosterone. Only follitropin will stimulate an increase in cyclic AMP in these cells, yet each agent individually increased the synthesis of androgen-binding protein in short-term cultures. For long-term culture of Sertoli cells follitropin, testosterone, insulin, and retinol appeared to act synergistically to prolong the ability of the cells to secrete androgen-binding protein. These are the first reported results which suggest an action of insulin and retinol directly on Sertoli cells even though the importance of both factors in male reproduction is known.. ...
in Journal of Cell Science (1993), 105 ( Pt 1). The precise distribution of DNA and RNA within the human Sertoli cell nucleolus has been investigated, at the ultrastructural level, by cytochemical and molecular immunocytochemical techniques. In Sertoli ... [more ▼]. The precise distribution of DNA and RNA within the human Sertoli cell nucleolus has been investigated, at the ultrastructural level, by cytochemical and molecular immunocytochemical techniques. In Sertoli cells, the nucleolar components show a typical spatial distribution. The fibrillar centres are not surrounded by a layer of dense fibrillar component, but come in contact only with strands of dense fibrillar component. These fibrillar parts of strands are the extensions of granular strands connected to a large granular mass. These strands delimit numerous nucleolar interstices in which chromatin fibres are clearly obvious. Using the in situ terminal deoxynucleotidyl transferase/immunogold procedure for detecting DNA, we find ...
Metastatic Sertoli cell tumor is a very rare and deadly disease accounting for approximately 1% of all testicular carcinomas. With fewer than 30 cases reported in the literature, there has not been a uniform treatment regimen with good results. Retroperitoneal lymph node dissection, chemotherapy, and radiation therapy in combination appear to offer the best outcome. This report describes the occurrence of this rare tumor in a 38-year-old man 2 years after left orchiectomy.
We examined in detail the differentiation of Sertoli, fetal Leydig and germ cells in XX transgenic fetal gonads at 14.5 dpc. We first performed immunofluorescence for AMH, a marker of Sertoli cell differentiation and a direct transcriptional target of SOX9 (De Santa Barbara et al., 1998), and for HSD3β, a steroidogenic enzyme expressed by fetal Leydig cells. The presence of cells expressing AMH or HSD3β confirmed that both Sertoli and fetal Leydig cells had formed in the sex-reversed XX Dmrt1 transgenic testes, as in wild-type XY testes but not XX ovaries (Fig. 2A-D). These results were confirmed by qRT-PCR (Fig. 2I,O).. We next assayed the expression of additional Sertoli and fetal Leydig cell marker genes using qRT-PCR. Genes involved in the differentiation of Sertoli (Sox8, Sox10, Ptgds and Dhh) and fetal Leydig (Star, Cyp11a1, Insl3 and Cyp17a1) cells were consistently upregulated in XX transgenic testes, as compared with wild-type ovaries (Fig. 2J-N,P; supplementary material Fig. S2A,B). ...
TY - JOUR. T1 - Significance of inhibin in reproductive pathophysiology and current clinical applications. AU - Kumanov, Philip. AU - Nandipati, Kalyana C.. AU - Tomova, Analia. AU - Robeva, Raliza. AU - Agarwal, Ashok. PY - 2005/6. Y1 - 2005/6. N2 - The human reproductive process is regulated by complex mechanisms that involve many organs, including the brain, gonads and endocrine system. It has been more than 70 years since the name inhibin was used to describe a substance produced in the gonads that negatively regulates pituitary secretion. Inhibin B controls FSH secretion via a negative feedback mechanism. It is a glycoprotein hormone secreted by the Sertoli cells of the testis and granulosa and theca cells of the ovary. Serum inhibin B concentrations are positively related to testicular volume and sperm counts. Current understanding of inhibin physiology and pathology in the human suggests that inhibin B may be of importance as a marker of Sertoli cell function in men with infertility and ...
The long-term goal of this project is to understand the cellular and molecular signals instigated in the testis that lead to germ cell apoptosis as a result of...
The mature spermatozoa are released from the protective Sertoli cells into the lumen of the seminiferous tubule and a process called spermiation then takes place, which removes the remaining unnecessary cytoplasm and organelles. The resulting spermatozoa are now mature but lack motility, rendering them sterile. The non-motile spermatozoa are transported to the epididymis in testicular fluid secreted by the Sertoli cells with the aid of peristaltic contraction. Whilst in the epididymis they acquire motility and become capable of fertilisation. However, transport of the mature spermatozoa through the remainder of the male reproductive system is achieved via muscle contraction rather than the spermatozoons recently acquired motility. ...
The BTB was hypothesized to be deficient in Etv5 -/- mice, and that this was mediated by Claudin 5 (CLD5). In both Etv5-/- and W/Wnu mice, the BTB was leaky. Examination of CLD5 expression among mice of various ages and phenotypes revealed the following: both ETV5 and germ cells were necessary for seminiferous epithelial CLD5 expression; CLD5 expression was ETV5 independent in vascular endothelium; and CLD5 was expressed in both Sertoli cells and spermatogonia. Data presented here support the conclusion that Sertoli cell CLD5 has a role in BTB function, but also a non-tight junction role in spermatogonia ...
Build: Wed Jun 21 18:33:50 EDT 2017 (commit: 4a3b2dc). National Center for Advancing Translational Sciences (NCATS), 6701 Democracy Boulevard, Bethesda MD 20892-4874 • 301-435-0888. ...
The Fas/FasL signaling pathway is one of the major pathways that regulate apoptosis. Increasing studies have shown that the activation of the Fas/FasL signaling pathway is closely associated with testicular cell apoptosis. However, the mechanism involved is still unclear. We discuss recent findings regarding the molecular mechanisms by which environmental toxicants induce testicular pathology via Fas/FasL signaling. These findings suggest that Fas/FasL signaling is employed to impact the sensitivity (a response to external factors) of germ cells, disrupt steroidogenic hormone and cytokine metabolism mediated by Sertoli cells, and elicit the activation of NFAT (nuclear factor of activated T-cells) in Leydig cell apoptosis ...
The injected trans-differentiated cells were closely interacting with the native germ cells, which shows that they definitely do not have any bad effect on the germ cells," says Yossi Buganim, a postdoctoral researcher in the Jaenisch lab and first author of the Cell Stem Cell paper. "Instead, they enable those germ cells to survive." In fact, when the embryonic Sertoli-like cells were used to sustain other cells in a Petri dish, Buganim noted that the cells supported by the trans-differentiated cells thrived, living longer than cells sustained by actual native Sertoli cells.. Encouraged by these results in vitro, Buganim says he would like to investigate whether the embryonic Sertoli-like cells retain this enhanced supportive capacity after transplantation into the brain, where the cells could sustain ailing neurons. If so, they could have applications in the development of neuron-based therapies for neurodegenerative disorders such as ALS and Parkinsons disease. This work was supported by the ...
Yearwood, Ryan; La Barbera, Andrew R.; Marsh, Karen (University of Cincinnati. College of Medicine; University of Cincinnati, 2007-02-06) ...
Germ Cell, Germ Cells, Sertoli Cells, Testes, Testis, Cancer, Gene, Tumors, Cancers, Endometrial Cancer, Cell, Fumarate Hydratase, Hypoxia, and Mutations
Hi For the last 8 months Ive been working on an in vitro bioassay for FSH. However, I have been struggling with a lack of sensativity when dealing with serum samples which are typically around the 2 ng/ml region. The assay involves incubating sertoli cells from the testes of 7-10 day old rats in the presence of FSH. The presence of FSH then causes a dose-dependent increase in aromatase activity when adrostendione is converted to estradiol which can be measured to determine the concentration of FSH. If anyone out there is familiar with this assay and can help me to increase the sensativity (by decreasing the variability) then please e-mail me Wayne Young Youngwa at agresearch.cri.nz AgResearch New Zealand ...