Curcumin and dexmedetomidine prevents oxidative stress and renal injury in hind limb ischemia/reperfusion injury in a rat model

Curcumin and dexmedetomidine have been shown to have protective effects in ischemia-reperfusion injury on various organs. However, their protective effects on kidney tissue against ischemia-reperfusion injury remain unclear. We aimed to determine whether curcumin or dexmedetomidine prevents renal tissue from injury that was induced by hind limb ischemia-reperfusion in rats. Fifty rats were divided into five groups: sham, control, curcumin (CUR) group (200 mg/kg curcumin, n = 10), dexmedetomidine (DEX) group (25 μg/kg dexmedetomidine, n = 10), and curcumin-dexmedetomidine (CUR-DEX) group (200 mg/kg curcumin and 25 μg/kg dexmedetomidine). Curcumin and dexmedetomidine were administered intraperitoneally immediately after the end of 4 h ischemia, just 5 min before reperfusion. The extremity re-perfused for 2 h and then blood samples were taken and total antioxidant capacity (TAC), total oxidative status (TOS) levels, and oxidative stress index (OSI) were measured, and renal tissue samples were histopathologically examined. The TAC activity levels in blood samples were significantly lower in the control than the other groups (p < 0.01 for all comparisons). The TOS activity levels in blood samples were significantly higher in Control group and than the other groups (p <  0.01 for all comparison). The OSI were found to be significantly increased in the control group compared to others groups (p < 0.001 for all comparisons). Histopathological examination revealed less severe lesions in the sham, CUR, DEX, and CUR-DEX groups, compared with the control group (p < 0.01). Rat hind limb ischemia-reperfusion causes histopathological changes in the kidneys. Curcumin and dexmedetomidine administered intraperitoneally was effective in reducing oxidative stress and renal histopathologic injury in an acute hind limb I/R rat model.

Modified Limberg flap technique in the treatment of pilonidal sinus disease in teenagers

BACKGROUND

Pilonidal sinus disease (PSD) is most common in young adults but can also affect teenagers. Although many techniques have been used to treat pilonidal sinus disease in adults, few studies have compared treatment methods for the condition in teenagers. In this study, we aimed to compare the modified Limberg flap technique with the excision and primary closure technique, both of which are used routinely in adults and teenage patients.

MATERIALS AND METHODS

This study was a retrospective review of 40 teenaged patients who underwent surgery in a single pediatric surgery center over ~2 years. The patients' age, gender, body mass index (BMI), number of sinuses, surgery technique and any complications were recorded. The patients underwent excision and primary repair or rhomboid excision and a modified Limberg flap.

RESULTS

Of the 40 patients, 22 (55%) were female, and 18 (45%) were male. The mean age of all the patients was 15.20 ± 1.31 (12-17) years. The average number of sinuses was 3.18 ± 0.90 (1-5). Of the patients, 52.5% (n=21) had a high body mass index. These patients were obese (n=4) and overweight(n=17). Pilonidal sinus excision and primary repair were performed in 8 (20%) of the patients, while the remaining 32 (80%) underwent the modified Limberg flap technique. Complications were observed in 87.5% of the patients undergoing excision and primary repair, and in 15.6% of those who underwent the modified Limberg flap technique. Recurrence was observed with only the primary repair technique (37.5%).

DISCUSSION

When compared with adults, teenage pilonidal sinus disease occurs more frequently in females. In this study, no correlation existed between the number of sinuses, symptoms, BMI and postoperative complications. Based on the results of this study, the modified Limberg flap technique has a low complication rate when used to treat pilonidal sinus disease in teenagers.