title: Uchl1 and its associated proteins were involved in spermatocyte apoptosis in mouse experimental cryptorchidism.
abstract: Uchl1 was found to be involved in spermatocyte apoptosis. The aim of the present study was to test whether Uchl1 and its associated proteins Jab1 and p27(kip1) were involved in spermatogenic damages in response to heat-stress in cryptorchidism. Hematoxylin and eosin (HE) staining and DNA end labeling (TUNEL) were used to observe morphological and apoptotic characteristics of spermatogenic cells; Immunohistochemical analysis was used to detect changes of Uchl1 and its associated proteins Jab1 and p27(kip1) in response to heat-stress from cryptorchidism leading to spermatocyte losses; And protein affinity analysis (pull-down) and immunofluorescence co-localization were used to verify the relevance among the three proteins in spermatocytes. The results showed that, Jab1 and p27(kip1), in parallel to Uchl1, increased in spermatocytes of apoptotic appearances in response to heat-stress, but not in multinucleated giant cells; Jab1 bound to Uchl1 in testis protein extracts, and co-localized with Uchl1 and p27(kip1) specifically in spermatocytes with apoptotic appearances. These results suggest that the accumulation of Uchl1 protein is involved in the heat-stress-induced spermatocyte apoptosis through a new pathway related with Jab1 and p27(kip1), but not the formation of multinucleated giant cells.
authors.affiliation: Shanghai Medical College, Fudan University, Shanghai 200032, China; Key Laboratory of Contraceptive Drugs and Devices of National Population and Family Planning Commission of China, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, China. wangjiansippr@126.com; sunzgbio@126.com.
authors.forename: Ping
authors.initials: P
authors.lastname: DU
authors.forename: Yu-Wei
authors.initials: YW
authors.lastname: Yao
authors.forename: Yan
authors.initials: Y
authors.lastname: Shi
authors.forename: Zheng
authors.initials: Z
authors.lastname: Gu
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Zhao-Gui
authors.initials: ZG
authors.lastname: Sun
authors.forename: Jia-Ke
authors.initials: JK
authors.lastname: Zuo
mesh_terms: D000818:Animals; D017209:Apoptosis; D000075686:COP9 Signalosome Complex; D003456:Cryptorchidism / Q000473:pathology*; D050760:Cyclin-Dependent Kinase Inhibitor p27 / Q000378:metabolism; D006358:Hot Temperature; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism; D008297:Male; D051379:Mice; D010447:Peptide Hydrolases / Q000378:metabolism; D013090:Spermatocytes / Q000166:cytology* / Q000378:metabolism; D013312:Stress, Physiological; D043222:Ubiquitin Thiolesterase / Q000378:metabolism*
chemical_list: C493961:Cdkn1b protein, mouse; D047908:Intracellular Signaling Peptides and Proteins; D050760:Cyclin-Dependent Kinase Inhibitor p27; D010447:Peptide Hydrolases; C501490:Cops5 protein, mouse; D000075686:COP9 Signalosome Complex; D043222:Ubiquitin Thiolesterase; C496976:Uchl1 protein, mouse