title: Effects of trapidil on the healing of colonic anastomoses in an experimental rat model.
abstract: BACKGROUND
  Trapidil has various properties including vasodilatation, inhibition of lipid peroxidation and platelet aggregation as well as, and reduction of, the inflammatory response to injury. The aim of the present study was to investigate the effects of trapidil on dexamethasone-impaired colonic anastomotic healing in an experimental rat model.
  
  
  METHODS
  Twenty-four Wistar rats underwent colonic transsection and primary anastomosis. Rats were divided into four groups of six: group 1 (G1), control; group 2 (G2) trapidil, 8 mg/kg per day intravenously; group 3 (G3) dexamethasone, 0.1 mg/kg per day intramuscularly; and group 4 (G4) dexamethasone 0.1 mg/kg intramuscularly and trapidil 8 mg/kg intravenously per day, for 1 week. Anastomotic bursting pressure, hydroxyproline level, histopathological grading, malondialdehyde and nitrite/nitrate levels were determined.
  
  
  RESULTS
  Dexamethasone-impaired anastomotic healing was found to be improved by trapidil administration in terms of anastomotic bursting pressure and hydroxyproline content (P = 0.026, and P = 0.017). In addition, histopathological examination revealed an increase in fibroblast proliferation and collagen deposition (P = 0.004, and P = 0.015) and a decrease in leucocyte infiltration (P = 0.004). Moreover, serum nitrite/nitrate and malondialdehyde levels decreased when G3 was compared to G4 (P < 0.001, P = 0.38).
  
  
  CONCLUSIONS
  Trapidil may improve the dexamethasone-impaired anastomotic healing due to its preventive effects on inflammatory response and lipid peroxidation in rats.
authors: Department of General Surgery, Mersin University, Faculty of Medicine, Mersin, Turkey. tcolak@mersin.edu.tr
authors: Tahsin
authors: T
authors: Colak
authors: Ali
authors: A
authors: Nayci
authors: Gurbuz
authors: G
authors: Polat
authors: Ayse
authors: A
authors: Polat
authors: Ulku
authors: U
authors: Comelekoglu
authors: Arzu
authors: A
authors: Kanik
authors: Ozgur
authors: O
authors: Turkmenoglu
authors: Suha
authors: S
authors: Aydin
mesh_terms: D000714:Anastomosis, Surgical; D000818:Animals; D003082:Colectomy / Q000379:methods*; D003907:Dexamethasone / Q000009:adverse effects; D005938:Glucocorticoids / Q000009:adverse effects; D006909:Hydroxyproline / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D023421:Models, Animal; D009569:Nitric Oxide / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D013718:Tensile Strength / Q000187:drug effects; D014192:Trapidil / Q000494:pharmacology*; D014665:Vasodilator Agents / Q000494:pharmacology*; D014945:Wound Healing / Q000187:drug effects*
chemical_list: D005938:Glucocorticoids; D014665:Vasodilator Agents; D009569:Nitric Oxide; D003907:Dexamethasone; D014192:Trapidil; D006909:Hydroxyproline