Abstract
This study was done in order to determine the molecular and biochemical alterations following testicular torsion (TT) and torsion-reperfusion (TR). For this purpose, 54 male Wistar rats were divided into five groups as control group (n = 6) and experimental group subjected to 1, 2, 4, and 8 h unilateral left torsion induction (n = 12 in each group). After induction of TT, testicular samples were collected from each group (n = 6), and the other six rats of each group underwent the same period of reperfusion after TT and then were sampled. Histological changes, the mRNA and protein expression of heat shock protein-70 (Hsp70), and caspase-3 were examined using reverse transcriptase-PCR (RT-PCR) and immunohistochemistry, respectively. Testicular total antioxidant capacity (TAC), glutathione peroxidase (GSH-px), and malondialdehyde (MDA) levels were evaluated. The mRNA damage and DNA fragmentation were assessed. The TT and TR significantly reduced differentiation and spermiogenesis indices (p < 0.05). The TT- and TR-induced groups exhibited a severe reduction in Hsp70 expression as well as remarkable enhancement in caspase-3 expression. The TAC and GSH-px levels were decreased and the MDA content was increased in TT- and TR-induced groups. Finally, the TT and TR enhanced mRNA damage and DNA fragmentation. The TT- and TR-induced damaging oxidative stress, diminished Hsp70 expression, and enhanced caspase-3 mRNA and protein levels result in apoptosis following 1, 2, and 4 h. Whereas, following 8 h, TT and TR initiate the necrosis by inducing energy depletion as well as severe mRNA damage.
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Acknowledgments
Authors wish to thank departments of Comparative Histology and Embryology and Surgery and Diagnostic Imaging, Faculty of Veterinary Medicine, Urmia University.
Funding
The current manuscript is from thesis NO: 2D-337, which was funded by Urmia University. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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Shamsi-Gamchi, N., Razi, M. & Behfar, M. Testicular torsion and reperfusion: evidences for biochemical and molecular alterations. Cell Stress and Chaperones 23, 429–439 (2018). https://doi.org/10.1007/s12192-017-0855-0
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DOI: https://doi.org/10.1007/s12192-017-0855-0