title: Intraperitoneal aminoguanidine improves sciatic nerve ischemia-reperfusion injury in male sprague-dawley rats.
abstract: The present work was designed to investigate the potential protective effects of post-ischemic treatment with aminoguanidine (AG) on sciatic nerve ischemia/reperfusion (I/R) injury in rat. Seventy-two rats were divided into 12 groups (n = 6). We used ischemia model in these groups by occluding the right common iliac and femoral arteries for 3 h with a silk suture 6-0 using slipknot technique. Treatment groups (2, 4, 6, 8, 10, and 12) received 150 mg/kg AG intraperitoneally 24 h after induction of ischemia. After certain time intervals of reperfusion (2, 4, 7, 14, and 28 days), the function of the hind limb was assessed using behavioral scores based on gait, racing reflex, toe spread, pinch sensitivity, paw position, and grasp. After euthanasia, sciatic nerves were removed at the end of reperfusion times and sections were cut at 5 μm, then were stained for light microscopy studies and graded for ischemic fiber degeneration (IFD), edema, and apoptosis. Maximal behavioral deficit occurred at 7 days of reperfusion. The comparison of behavioral score pertaining to the control and AG groups revealed significant differences and showed also a better time course in recovery (P < 0.05). Other than 3 and 4 groups, the amount of edema in AG treatment groups showed significant differences compared with control groups (P < 0.05). IFD was also significantly decreased in the AG treatment groups than controls. Most importantly, I/R-induced apoptosis were improved significantly on the 4th, 7(th), and 14th days of reperfusion in AG-treated groups compared to controls. In conclusion, our findings suggest that post-ischemic administration of AG exhibits protective effect against sciatic nerve I/R injury.
authors.affiliation: Department of Physiology and Pharmacology, Zanjan University of Medical Sciences, Iran.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Alipour
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Gholami
authors.forename: Iraj
authors.initials: I
authors.lastname: Jafari Anarkooli
authors.forename: Davood
authors.initials: D
authors.lastname: Sohrabi
authors.forename: Javad
authors.initials: J
authors.lastname: Tajki
authors.forename: Maryam
authors.initials: M
authors.lastname: Pourheidar
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D001522:Behavior, Animal / Q000187:drug effects; D004791:Enzyme Inhibitors / Q000494:pharmacology / Q000627:therapeutic use; D006146:Guanidines / Q000008:administration & dosage* / Q000494:pharmacology / Q000627:therapeutic use*; D007274:Injections, Intraperitoneal; D008297:Male; D009410:Nerve Degeneration / Q000150:complications / Q000473:pathology; D051381:Rats; D017207:Rats, Sprague-Dawley; D015427:Reperfusion Injury / Q000150:complications / Q000188:drug therapy* / Q000473:pathology; D012584:Sciatic Nerve / Q000098:blood supply* / Q000187:drug effects / Q000473:pathology*; D013997:Time Factors
chemical_list: D004791:Enzyme Inhibitors; D006146:Guanidines; C004479:pimagedine