Evidence for a role of mitogen-activated protein kinase 3/mitogen-activated protein kinase in the development of testicular ischemia-reperfusion injury

被引:46
|
作者
Minutoli, L
Antonuccio, P
Romeo, C
Nicòtina, PA
Bitto, A
Arena, S
Polito, F
Altavilla, D
Turiaco, N
Cutrupi, A
Zuccarello, B
Squadrito, F
机构
[1] Univ Messina, Dept Expt & Clin Med & Pharmacol, I-98124 Messina, Italy
[2] Univ Messina, Dept Med & Surg Pediat Sci, I-98124 Messina, Italy
[3] Univ Messina, Dept Human Pathol, I-98124 Messina, Italy
关键词
kinases; Leydig cells; male reproductive tract; testis;
D O I
10.1095/biolreprod.105.040741
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Mitogen-activated protein kinase (MAPK) 3/MAPK1 (also known as ERK1/ERK2) plays an important role in the signal transduction pathways. To our knowledge, however, its role in the development of testicular ischemia-reperfusion injury has not yet been investigated. Therefore, we studied the pattern of MAPK3/MAPK1 activation in a experimental model of testicular ischemia-reperfiusion injury. We, also investigated MAPK8 to understand whether an association exists between these two MAPKs. Adult male Sprague-Dawley rats were subjected to 1 h of testicular ischemia followed by 24 h of reperfusion or to a sham testicular ischemia-reperfusion. Animals were randomized to receive PD98059, which is an inhibitor of MAPK3/MAPK1 (10 mg/kg i.p. administered immediately after detorsion), or its vehicle. The time course of MAPK3/MAPK1, MAPK8, and tumor necrosis factor (TNF; also known as TNF alpha) expression and a histological examination in both the ischemic-reperfused testis land the contralateral one were performed. In both testes,,MAPK3/MAPK1 and MAPK8 expression appeared following 10 min of reperfusion and reached their highest activation after 30 min. The MAPK levels slowly decreased, and no significant expression of either kinase was observed following 2 h of reperfusion. Expression of TNF was evident after 1 h of reperfusion and reached its maximum increase after 3 h. PD98059 blunted MAPK3/MAPK1 and MAPK8, reduced TNF expression, and improved the testicular damage caused by ischemia-reperfusion injury, in both testes. These data emphasize that MAPK3/MAPK1 has a role in testicular damage and that its blockade might have a future therapeutic role for the management of patients with unilateral testicular torsion.
引用
收藏
页码:730 / 736
页数:7
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