BACKGROUND & AIMS: Postoperative ileus is a poorly understood and common problem. We previously demonstrated an association between a suppression in jejunal circular muscle activity and a massive extravasation of leukocytes into the muscularis after surgical manipulation of the small bowel. This study was pursued to establish a direct causal link between these events. METHODS: Reverse-transcription polymerase chain reaction and immunohistochemistry were used to detect and localize expression of adhesion molecules: P-selectin, intercellular adhesion molecule 1 (ICAM-1), and lymphocyte function-associated antigen 1 (LFA-1). Leukocyte infiltration and in vitro jejunal circular muscle function were quantified in controls and manipulated animals with and without antibody treatment (1A29, WT.1, and WT.3). RESULTS: Surgical manipulation caused a significant up-regulation within the muscularis of ICAM-1 and P-selectin messenger RNA. ICAM-1 and P-selectin protein expression was increased within the muscularis microvasculature, and ICAM-1 and LFA-1 were expressed on infiltrating cells. Administration of adhesion molecule antibodies prevented the recruitment of monocytes and neutrophils into the muscularis and also averted jejunal circular muscle dysfunction. CONCLUSIONS: The data demonstrate that adhesion molecule antibodies prevent surgically induced suppression of intestinal muscle contractions and therefore suggests that late postoperative ileus is mediated through a leukocytic inflammatory response within the intestinal muscularis externa.
BACKGROUND & AIMS: Postoperative ileus is a poorly understood and common problem. We previously demonstrated an association between a suppression in jejunal circular muscle activity and a massive extravasation of leukocytes into the muscularis after surgical manipulation of the small bowel. This study was pursued to establish a direct causal link between these events. METHODS: Reverse-transcription polymerase chain reaction and immunohistochemistry were used to detect and localize expression of adhesion molecules: P-selectin, intercellular adhesion molecule 1 (ICAM-1), and lymphocyte function-associated antigen 1 (LFA-1). Leukocyte infiltration and in vitro jejunal circular muscle function were quantified in controls and manipulated animals with and without antibody treatment (1A29, WT.1, and WT.3). RESULTS: Surgical manipulation caused a significant up-regulation within the muscularis of ICAM-1 and P-selectin messenger RNA. ICAM-1 and P-selectin protein expression was increased within the muscularis microvasculature, and ICAM-1 and LFA-1 were expressed on infiltrating cells. Administration of adhesion molecule antibodies prevented the recruitment of monocytes and neutrophils into the muscularis and also averted jejunal circular muscle dysfunction. CONCLUSIONS: The data demonstrate that adhesion molecule antibodies prevent surgically induced suppression of intestinal muscle contractions and therefore suggests that late postoperative ileus is mediated through a leukocytic inflammatory response within the intestinal muscularis externa.
Authors: Sjoerd Hw van Bree; Andrea Nemethova; Fleur S van Bovenkamp; Pedro Gomez-Pinilla; L Elbers; Martina Di Giovangiulio; Gianluca Matteoli; Jan van Vliet; Cathy Cailotto; Michael Wt Tanck; Guy Ee Boeckxstaens Journal: Int J Physiol Pathophysiol Pharmacol Date: 2012-12-26
Authors: G Barbara; R De Giorgio; V Stanghellini; R Corinaldesi; C Cremon; N Gerard; C Gerard; E F Grady; N W Bunnett; P A Blennerhassett; S M Collins Journal: Gut Date: 2003-10 Impact factor: 23.059