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Volume 22, Issue 5 (September 2020) 22, 493–499; 10.4103/aja.aja_122_19

Phosphoribosyl-pyrophosphate synthetase 2 (PRPS2) depletion regulates spermatogenic cell apoptosis and is correlated with hypospermatogenesis

Bin Lei1, Li-Xia Xie2, Shou-Bo Zhang3, Bo Wan4, Li-Ren Zhong4, Xu-Ming Zhou4, Xiang-Ming Mao4, Fang-Peng Shu4

1 Department of Urology, The First Affiliated Hospital of Jinan University, Guangzhou 510630, China
2 Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou 510060, China
3 Center for Reproductive Medicine, Guangdong Armed Police Hospital, Guangzhou Medical University, Guangzhou 510507, China
4 Department of Urology, Zhujiang Hospital of Southern Medical University, Guangzhou 510282, China

Correspondence: Dr. XM Mao (mxm631221@126.com) or Dr. FP Shu (15625060053@163.com)

Date of Submission 16-Feb-2019 Date of Acceptance 28-Aug-2019 Date of Web Publication 15-Nov-2019


Phosphoribosyl-pyrophosphate synthetase 2 (PRPS2) is a rate-limiting enzyme and plays an important role in purine and pyrimidine nucleotide synthesis. Recent studies report that PRPS2 is involved in male infertility. However, the role of PRPS2 in hypospermatogenesis is unknown. In this study, the relationship of PRPS2 with hypospermatogenesis and spermatogenic cell apoptosis was investigated. The results showed that PRPS2 depletion increased the number of apoptotic spermatogenic cells in vitro. PRPS2 was downregulated in a mouse model of hypospermatogenesis. When PRPS2 expression was knocked down in mouse testes, hypospermatogenesis and accelerated apoptosis of spermatogenic cells were noted. E2F transcription factor 1 (E2F1) was confirmed as the target gene of PRPS2 and played a key role in cell apoptosis by regulating the P53/Bcl-xl/Bcl-2/Caspase 6/Caspase 9 apoptosis pathway. Therefore, these data indicate that PRPS2 depletion contributes to the apoptosis of spermatogenic cells and is associated with hypospermatogenesis, which may be helpful for the diagnosis of male infertility.

Keywords: hypospermatogenesis; male infertility; molecular marker; phosphoribosyl-pyrophosphate synthetase 2; spermatogenesis

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