The effect of zinc aspartate pretreatment on ischemia-reperfusion injury and early changes of blood and tissue antioxidant enzyme activities after unilateral testicular torsion-detorsion.
OBJECTIVE
The aim of this study is to investigate the effect of zinc aspartate (ZA) pretreatment on ischemia-reperfusion (I/R) injury and blood and tissue antioxidant enzyme activity early after unilateral testicular torsion-detorsion (T/D).


METHODS
Forty prepubertal male Sprague-Dawley rats (weight 160 to 220 g) were divided into 4 groups each containing 10 rats. Surgery was conducted under intraperitoneal 1-shot ketamine (50 mg/kg) anesthesia. The scrotum was entered through a midline incision. Rotating the left testis 720 degrees in a clockwise direction was the model of the testicular torsion. Group 1 was for the basal values. Group 2 had 4 hours T/D. Group 3 also had 4 hours T/D and pretreated with 50 mg/kg intraperitoneal ZA injection half an hour before detorsion. Group 4 was designed as a sham group. In the Group 2 and Group 3, the tunica vaginalis was opened, and left testicles were rotated clockwise 720 degrees and maintained in this torsion position by fixing with a silk suture to the scrotal wall. The scrotum was closed and 4 hours later reentered for testicular detorsion. After spermatic cord detorsion, the scrotum was closed. At the end of 4 hours detorsion period, bilateral orchiectomies were performed, and 5-mL intracardiac blood samples were taken. Blood and tissue superoxide dismutase (SOD), catalase (CAT) activities, and malondialdehyde (MDA) levels were measured, and histopathologic examination was performed.


RESULTS
Group 2 and group 3 had decreased blood SOD and CAT activities and elevated MDA levels indicating I/R injury. The 2 groups were also different from each other for these parameters reflecting the beneficial effect of ZA pretreatment (P <.05). The decreased ipsilateral tissue SOD and CAT activities in group 2 were different from the other groups including group 3 (P <.05). Ipsilateral tissue MDA levels of both group 2 and group 3 were elevated. Group 2 had higher values than group 3 (P <.05). In addition, specimens from group 2 had a significantly greater histologic injury than group 3 (P <.05). These findings were also supporting the beneficial effect of ZA pretreatment. All measurements of contralateral tests were similar to the basal values for all groups (P >.05).


CONCLUSIONS
ZA pretreatment reduces I/R injury by its antioxidant effects after unilateral testicular T/D and affects the antioxidant enzyme systems.
Ozkan
K U
KU
Department of Pediatric Surgery, Kahramanmaraş Sütçümam University, Medical Faculty, Kahramanmaraş, Turkey.
Boran
C
C
Kilinç
M
M
Garipardiç
M
M
Kurutaş
E B
EB
D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D001224:Aspartic Acid / Q000031:analogs & derivatives / Q000494:pharmacology* / Q000627:therapeutic use; D002374:Catalase / Q000097:blood / Q000378:metabolism; D004195:Disease Models, Animal; D008297:Male; D008315:Malondialdehyde / Q000097:blood / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D015427:Reperfusion Injury / Q000201:enzymology / Q000209:etiology / Q000517:prevention & control*; D013086:Spermatic Cord Torsion / Q000150:complications / Q000188:drug therapy* / Q000201:enzymology; D013482:Superoxide Dismutase / Q000097:blood / Q000378:metabolism; D013737:Testis / Q000187:drug effects / Q000201:enzymology* / Q000473:pathology
D000975:Antioxidants; D001224:Aspartic Acid; D008315:Malondialdehyde; D002374:Catalase; D013482:Superoxide Dismutase