Erythropoietin Administration Promotes Expression of VEGF in Renal Ischemic–Reperfusion Injury in Rat Model
Kongkham, S.; Sriwong, S.; Tasanarong, A.
Journal of the Medical Association of Thailand 99(Suppl 4): S246-S255
2016
ISSN/ISBN: 0125-2208 PMID: 29927177 Document Number: 17315
Acute ischemia-reperfusion (I/R) injury is the most common causes of acute renal failure in daily clinical Male Sprague-Dawley rats were pretreated with EPO (1,000 IU/kg/day, ip); or the placebo for 3 days before the induction of I/R procedure. On day 4, the bilateral renal occlusion for 30 min operations to produce renal I/R injury or treatment with EPO 30 min before the initiation of I/R were done. At the end of the reperfusion period at day 1 day 2 and day 4, blood and renal tissues were collected to investigate renal function and pathohistological examination. The expression levels of CAV-1 and CD34 were determined for circulating of EPCs in blood, while CD34, CAV-1 and VEGFR-2 were investigated for mobilized EPCs in kidney, using real time PCR. The expression level of VEGF was also examined to indicate the angiogenesis in kidney using real time PCR and western blotting. In the I/R group, the significantly increased values of serum urea and creatinine were found on Day 1 after ischemia, as compared to sham group. The development of tubular epithelial cell necrosis, peritubular capillary congestion and mild interstitial infiltration has been observed in this group. Administration of EPO in I/R rat was significantly improved renal function and significantly less the tubular damage. The treatment with EPO significantly increased in expression levels of CD34 and CAV-1 in blood, and also CAV-1, VEGFR-2 and VEGF in kidney tissue in this group, as compared to the I/R group. These results suggest that treatment with EPO protects the kidney from ischemic acute renal injury via