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Derivation of primodial germ cell-like cells from induced pluripotent stem cells of patients with idiopathic azoospermia

ABSTRACT: At present, the etiology of most non-obstructive azoospermia (NOA) remains unclear, and the patients are diagnosed as idiopathic infertility. In vitro generation of patient-specific induced pluripotent stem cells (iPSCs) is an effective approach for exploring the mechanisms of human disease. Here, we established iPSCs from patients with idiopathic NOA, and differentiated them into human germline cells both in vitro and in vivo. Compared with normal hiPSCs, the idiopathic NOA patient-specific iPSCs show less efficiency of primodial germ cell-like cells (PGCLCs) formation in vitro and poor proliferation potential in vivo. Although the transcriptomes of PGCLCs are different from that of embryonic gonadal PGCs, the expression patterns of key genes involved in human PGC specification are generally similar during PGCLC induction process from all iPSCs lines, including the activation of BLIMP1, TFAP2C, NANOS3, SOX17, and T, and the repression of PRDM14 and SOX2. Moreover, the PGCLCs derived from idiopathic NOA patient-specific iPSCs initiate epigenetic reprogramming with repression of 5mC and presence of 5hmC. These findings provide a unique foundation for future mechanism research of male infertility.

ORGANISM(S): Homo sapiens

PROVIDER: GSE126009 | GEO | 2019/02/28

REPOSITORIES: GEO

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Project description:Infertility affects about one in six couples attempting pregnancy, with the man responsible in approximately half of the cases. Because the pathophysiology underlying azoospermia is not elucidated, most male infertility is diagnosed as idiopathic. Genome-wide gene expression analyses with microarray on testis specimens from 47 non-obstructive azoospermia (NOA) and 11 obstructive azoospermia (OA) patients were performed, and 2,611 transcripts that preferentially included genes relevant to gametogenesis and reproduction according to Gene Ontology classification were found to be differentially expressed. Using a set of 945 of the 2,611 transcripts without missing data, NOA was further categorized into three classes using the non-negative matrix factorization method. These three subclasses showed differences in Johnsenâs score, FSH level, and LH level. In addition, the 52 genes showing high statistical difference between NOA subclasses (P < 0.01 with Tukey's post hoc test) were subjected to allelic association analyses to identify genetic susceptibilities in 442 NOA patients and 475 fertile men. After two rounds of screening, SNPs of the ADP-ribosyltransferase 3 (ART3) gene were associated with NOA with highest significance with ART3-SNP25 (rs6836703; P = 0.0025). Haplotypes with 5 SNPs were constructed, and the most common haplotype was found to be under-represented in patients (NOA 26.6 % versus control 35.3 %, P = 0.000073). Subjects having the most common haplotype showed an elevated level of testosterone, suggesting a protective effect of the haplotype on spermatogenesis. Thus, genome-wide gene expression analyses were used to identify genes involved in the pathogenesis of NOA, and ART3 was subsequently identified as a susceptibility gene for NOA. These findings clarify the molecular pathophysiology of NOA and suggest a novel therapeutic target in the treatment of NOA. Experiment Overall Design: Comparative analysis of two disease phenotypes, using testicular biopsy specimens from 47 NOA and 11 OA patients. No experimental replicates.

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Derivation of primodial germ cell-like cells from induced pluripotent stem cells of patients with idiopathic azoospermia

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