OBJECTIVE

To determine the effects of blocking the translation of cyclooxygenase-2 (COX-2) mRNA on the mRNA levels of type I collagen, type III collagen, fibronectin, and transforming growth factor-beta (TGF-beta1) in fibroblasts obtained from normal peritoneal and adhesion tissues.

DESIGN

Prospective experimental study.

SETTING

University medical center.

PATIENT(S): Fibroblasts established from peritoneal and adhesion tissue of the same patients.

INTERVENTION(S): Adenovirus with COX-2 treatment of the primary cultured fibroblasts.

MAIN OUTCOME MEASURE(S): Fibroblasts of normal peritoneal and adhesion tissues were isolated from the same patients. Adhesion and normal peritoneal fibroblasts were transfected with an adenovirus COX-2 mRNA in sense or antisense orientation. RNA was extracted from each treatment and subjected to real time reverse transcriptase-polymerase chain reaction to quantify change in mRNA levels of type I collagen, type III collagen, fibronectin, and TGF-beta1.

RESULT(S): Type I collagen, type III collagen, fibronectin, and TGF-beta1 mRNAs were present in both normal peritoneal and adhesion fibroblasts with significantly higher levels in adhesion fibroblasts. Normal fibroblasts transfected with the COX-2 sense virus exhibited an elevated mRNA level in those molecules that reached the mRNA levels seen for adhesion fibroblasts. There were no effects seen on the mRNA levels in those molecules when adhesion fibroblasts were transfected with COX-2 sense virus. Normal fibroblasts transfected with COX-2 antisense virus exhibited no difference in mRNA levels in those molecules as compared with untransfected controls. In contrast, adhesion fibroblasts transfected with COX-2 antisense exhibited markedly reduced mRNA levels in those molecules to levels that were seen in normal peritoneal fibroblasts.

CONCLUSION(S): Our data suggest that inhibition of COX-2 may reduce the development of postoperative adhesions by preventing the formation of the adhesion phenotype.