{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T00:28:28Z","timestamp":1786321708327,"version":"build-2736575974"},"reference-count":33,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T00:00:00Z","timestamp":1784678400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82501948"],"award-info":[{"award-number":["82501948"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82301812"],"award-info":[{"award-number":["82301812"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["32000584"],"award-info":[{"award-number":["32000584"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82371622"],"award-info":[{"award-number":["82371622"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003995","name":"Natural Science Foundation of Anhui Province","doi-asserted-by":"publisher","award":["2308085QH253"],"award-info":[{"award-number":["2308085QH253"]}],"id":[{"id":"10.13039\/501100003995","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003995","name":"Natural Science Foundation of Anhui Province","doi-asserted-by":"publisher","award":["2408085QH287"],"award-info":[{"award-number":["2408085QH287"]}],"id":[{"id":"10.13039\/501100003995","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>In brief: In brief<\/jats:p>\n                  <jats:p>Sperm motility and male fertility depend on the proper assembly and function of the mitochondrial sheath during late spermiogenesis. This study shows that sperm mitochondria-associated cysteine-rich protein (SMCP) maintains reactive oxygen species homeostasis during mitochondrial sheath assembly, thereby supporting mitochondrial sheath function, sperm motility, and male fertility.<\/jats:p>\n                  <jats:p>Abstract: Abnormal morphology or function of the sperm mitochondrial sheath is a major cause of asthenozoospermia, yet the mechanisms governing its assembly and functional maturation remain poorly understood. Sperm mitochondria-associated cysteine-rich protein (SMCP) is a mitochondrial sheath\u2013associated protein, and its regulation at the protein level during late spermiogenesis has attracted substantial interest. Here, we show that SMCP is expressed during mitochondrial sheath assembly in late spermiogenesis. SMCP is initially detected in the cytoplasm of elongating spermatids and, following cytoplasm removal, a fraction is retained in the mitochondrial sheath of mature spermatozoa. SMCP deficiency leads to markedly reduced sperm motility and male infertility without overt alterations in mitochondrial sheath morphology. Integrative proteomic and functional analyses further reveal that SMCP loss impairs mitochondrial respiratory chain function and reduces ATP production. Mechanistically, SMCP associates with glutaredoxin-1 (GLRX), and SMCP deficiency disrupts GLRX localization, accompanied by elevated reactive oxygen species levels during mitochondrial sheath assembly and in mature sperm. These redox defects likely contribute to compromised mitochondrial sheath function. Collectively, our findings identify SMCP as a regulator of functional module assembly within the sperm mitochondrial sheath and support the concept that mitochondrial sheath assembly represents not only a morphogenetic process but also a developmental window for functional maturation and redox programming, with the SMCP\u2013GLRX complex serving as a localized antioxidant module during this period.<\/jats:p>","DOI":"10.1093\/reprod\/xaag090","type":"journal-article","created":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T11:32:20Z","timestamp":1784633540000},"source":"Crossref","is-referenced-by-count":0,"title":["SMCP maintains ROS homeostasis during sperm mitochondrial sheath assembly"],"prefix":"10.1093","volume":"172","author":[{"given":"Chang","family":"Wang","sequence":"first","affiliation":[{"name":"Key Laboratory of Geriatric Nursing and Health, School of Nursing, Anhui University of Chinese Medicine , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xun","family":"Xia","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University , Hefei, Anhui,","place":["China"]},{"name":"Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yudie","family":"Guo","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University , Hefei, Anhui,","place":["China"]},{"name":"Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xi","family":"Zhang","sequence":"additional","affiliation":[{"name":"Northern Jiangsu Institute of Clinical Medicine, The Affiliated Huai\u2019an No. 1 People\u2019s Hospital of Nanjing Medical University , Huai\u2019an, Jiangsu,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengting","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University , Hefei, Anhui,","place":["China"]},{"name":"Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingsong","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University , Hefei, Anhui,","place":["China"]},{"name":"Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juran","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Geriatric Nursing and Health, School of Nursing, Anhui University of Chinese Medicine , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengting","family":"Tang","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University , Hefei, Anhui,","place":["China"]},{"name":"Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiaxin","family":"Fang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Geriatric Nursing and Health, School of Nursing, Anhui University of Chinese Medicine , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chuan","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University , Hefei, Anhui,","place":["China"]},{"name":"Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education , Hefei, Anhui,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Reproductive Medicine and Offspring Health, Clinical Center of Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University , Nanjing, Jiangsu,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dan","family":"Zhao","sequence":"additional","affiliation":[{"name":"Reproductive Medicine Center, The Fourth Affiliated Hospital of Jiangsu University , Zhenjiang, Jiangsu,","place":["China"]},{"name":"Reproductive Sciences Institute, Jiangsu University , Zhenjiang, Jiangsu,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9607-6605","authenticated-orcid":false,"given":"Rong","family":"Hua","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, the First Affiliated Hospital of Anhui Medical University , Hefei, Anhui,","place":["China"]},{"name":"Engineering Research Center of Biopreservation and Artificial 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