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Mediators of Inflammation
Volume 2018 (2018), Article ID 6136075, 10 pages
https://doi.org/10.1155/2018/6136075
Research Article

Downregulation of DJ-1 Fails to Protect Mitochondrial Complex I Subunit NDUFS3 in the Testes and Contributes to the Asthenozoospermia

1National Key Research Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
2Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
3Department of Urology, Peking University Third Hospital, Beijing 100191, China

Correspondence should be addressed to Yi Sun; nc.ude.umjb@iynus, Hui Jiang; moc.361@55iuhgnaij, and Xiaoping Pu; nc.ude.umjb@321pxp

Received 1 November 2017; Revised 29 December 2017; Accepted 14 January 2018; Published 3 April 2018

Academic Editor: Cheng Xiao

Copyright © 2018 Yupeng Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Asthenozoospermia (AS), an important cause of male infertility, is characterized by reduced sperm motility. Among the aetiologies of AS, inflammation seems to be the main cause. DJ-1, a conserved protein product of the PARK7 gene, is associated with male infertility and plays a role in oxidative stress and inflammation. Although our previous studies showed that a reduction in DJ-1 was accompanied by mitochondrial dysfunction in the sperm of patients with AS, the specific mechanism underlying this association remained unclear. In this study, we found that compared to the patients without AS, the expression of mitochondrial protein nicotinamide adenine dinucleotide dehydrogenase (ubiquinone) Fe-S protein 3 (NDUFS3) was also significantly decreased in the sperm of patients with AS. Similarly, decreased expression of DJ-1 and NDUFS3 and reduced mitochondria complex I activity were evident in a rat model of AS. Moreover, we showed that the interaction between DJ-1 and NDUFS3 in rat testes was weakened by ORN treatment. These results suggest that the impaired mitochondrial activity could be due to the broken interaction between DJ-1 and NDUFS3 and that downregulation of DJ-1 in sperm and testes contributes to AS pathogenesis.