Prepubertal Human Spermatogonia and Mouse Gonocytes Share Conserved Gene Expression of Germline Stem Cell Regulatory
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PROVIDER: PRJNA121265 | ENA |
REPOSITORIES: ENA
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Project description:Full title: Prepubertal Human Spermatogonia and Mouse Gonocytes Share Conserved Gene Expression of Germline Stem Cell Regulatory Molecules Oligonucleotide Microarray Analysis Reveals Novel Genes Expressed in Prepubertal Human Spermatogonia and Mouse Gonocytes
2009-11-07 | GSE18914 | GEO
Project description:Full title: Prepubertal Human Spermatogonia and Mouse Gonocytes Share Conserved Gene Expression of Germline Stem Cell Regulatory Molecules Oligonucleotide Microarray Analysis Reveals Novel Genes Expressed in Prepubertal Human Spermatogonia and Mouse Gonocytes Four hundred cells were selected for each group of germ cells or testis somatic cells from three independent testis cell preparations from both human (age 2, 8 and 10 yr) and mouse (age all 3 days) Selected germ and somatic cells were placed in 25 µl Trizol reagent (Invitrogen) immediately after isolation Oligonucleotide microarray was utilized to identify genes enriched in human and mouse selected germ cell populations and testis somatic cells.
2009-11-06 | E-GEOD-18914 | biostudies-arrayexpress
Project description:In the human testis, beginning at approximately 2 months of age, gonocytes are replaced by adult dark (Ad) and pale (Ap) spermatogonia that make up the spermatogonial stem cell (SSC) pool. In mice, the SSC pool arises from gonocytes approximately 6 days after birth. During puberty in both species, complete spermatogenesis is established by cells that differentiate from SSCs. Essentially pure populations of prepubertal human spermatogonia and mouse gonocytes were selected from testis biopsies and validated by confirming the presence of specific marker proteins in cells. Stem cell potential of germ cells was demonstrated by transplantation to mouse testes, following which the cells migrated to the basement membrane of the seminiferous tubule and were maintained similar to SSCs. Differential gene expression profiles generated between germ cells and testis somatic cells demonstrated that expression of genes previously identified as SSC and spermatogonial-specific markers (e.g., zinc-finger and BTB-domain containing 16, ZBTB16) was greatly elevated in both human spermatogonia and mouse gonocytes compared to somatic cells. Several genes were expressed at significantly higher levels in germ cells of both species. Most importantly, genes known to be essential for mouse SSC self-renewal (e.g., Ret proto-oncogene, Ret; GDNF-family receptor alpha1, Gfr alpha1; and B-cell CLL/lymphoma 6, member B, Bcl6b) were more highly expressed in both prepubertal human spermatogonia and mouse gonocytes than in somatic cells. The results indicate remarkable conservation of gene expression, notably for self-renewal genes, in these prepubertal germline cells between two species that diverged phylogenetically approximately 75 million years ago.
| S-EPMC2799876 | biostudies-literature
Project description:Antineoplastic treatments for cancer and other non-malignant disorders can result in male long-term or permanent infertility by ablating spermatogonial stem cells (SSCs). Preserving the future fertility of prepubertal patients faced with this prospect cannot rely on sperm banking. SSC transplantation using testicular tissue harvested before sterilizing treatment is a promising approach for restoring fertility, but lack of exclusive biomarkers which can unequivocally identify prepubertal SSCs in any primate species limits the therapeutic potential. To address this, we performed single-cell RNA-seq on unselected testis cells from immature baboons and macaques and compared these cells with published data from pre-pubertal human germ cells functionally-defined mouse SSCs. We found discrete groups of human spermatogonia while baboon and rhesus spermatogonia appeared less heterogenous. Cross-species analysis revealed cell types analogous to human SSCs in baboon and rhesus germ cells, but comparison with mouse SSCs revealed significant differences with primate SSCs. Indeed, a core component of a human SSC gene expression signature was conserved in baboon and rhesus spermatogonia and absent from mouse SSCs. These results further resolve the identity of pre-pubertal human SSCs and define novel pathways that could be leveraged for advancing their selection and propagation in vitro.
2023-05-15 | GSE222105 | GEO
Project description:Germline-specific RiboTag IP-seq from postnatal testes synchronized for undifferentiated spermatogonia.
2020-07-22 | GSE144922 | GEO
Project description:Mouse and human share conserved transcriptional programs for interneuron development
| PRJNA560215 | ENA
Project description:Here, gene profiles in rat spermatogonial stem cell lines are compared to publicly available mouse, monkey and human spermatogonial gene profiles. Interestingly, rat spermatogonia expressed metabolic control factors Foxa1, Foxa2 and Foxa3. Germline Foxa2 was enriched in Gfra1Hi and Gfra1Low undifferentiated A-single spermatogonia. Foxa2-bound loci in spermatogonial chromatin were over-represented by conserved stemness genes (Dusp6, Gfra1, Etv5, Rest, Nanos2, Foxp1) that intersect bioinformatically with conserved glutathione/pentose phosphate metabolism genes (Tkt, Gss, Gclc, Gclm, Gpx1, Gpx4, Fth), marking elevated spermatogonial GSH:GSSG. Cystine-uptake and intracellular conversion to cysteine typically couple glutathione biosynthesis to pentose phosphate metabolism. Rat spermatogonia, curiously, displayed poor germline stem cell viability in cystine-containing media, and, like primate spermatogonia, exhibited reduced transsulfuration pathway markers. Exogenous cysteine, cysteine-like mercaptans, somatic testis cells and ferroptosis inhibitors counteracted the cysteine starvation-induced spermatogonial death and stimulated spermatogonial growth factor activity in vitro.
2020-12-17 | GSE163302 | GEO
Project description:Sustained spermatogenesis in adult males and recovery of fertility following germ cell depletion are dependent on undifferentiated spermatogonia with self-renewal potential. Self-renewal of undifferentiated spermatogonia is dependent on a complex network of transcriptional and post-transcriptional regulatory factors. DDX5 is known to act as a transcriptional co-regulator in other systems through interactions with key transcription factors. Here, we performed ChIP-Seq to identify target genes of DDX5 in cultured undifferentiated spermatogonia in order to elucidate its role in maintenance of the male germline.
2019-04-02 | GSE110347 | GEO
Project description:Defective germline reprogramming in Miwi2- and Dnmt3l-deficient mice results in the failure to reestablish transposon silencing, meiotic arrest and progressive loss of spermatogonia. Here we sought to understand the molecular basis for this spermatogonial dysfunction. Through a combination of imaging, conditional genetics and transcriptome analysis, we demonstrate that germ cell elimination in the respective mutants arises due to defective germline reprogramming rather than a function for the respective factors within spermatogonia. In both Miwi2-/- and Dnmt3l-/- spermatogonia the intracisternal-A particle (IAP) family of endogenous retroviruses is de-repressed, but in contrast to meiotic cells DNA damage is not observed. Instead we find that unmethylated IAP promoters rewire the spermatogonial transcriptome by driving expression of neighboring host genes. In summary, defective reprogramming deregulates the spermatogonial transcriptome that may underlie spermatogonial dysfunction.
2018-03-09 | E-MTAB-6202 | biostudies-arrayexpress