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Effect of Humira® on Intestinal Anastomotic Response in Rabbits

ABSTRACT Aim: The aim of this study was to compare the strength and degree of inflammation in small intestinal anastomoses in rabbits after repeated preoperative treatment with the TNF-α antibody, adalimumab (Humira®), compared to placebo. Method: Thirty-three New Zealand white female rabbits were randomized to three weeks of weekly subcutaneous injections of adalimumab (n = 24) or placebo (n = 9). After this treatment regime, two end to end anastomoses were performed in the ileum. Following euthanasia on postoperative day 5 the anastomoses were evaluated for minimal tensile strength (MITS) and histological parameters of wound healing using a modified Verhofstad Scale. Results: There were no statistically significant differences between the adalimumab and placebo groups in terms of MITS or histological parameters. Multiple regression analyzes revealed that there was no association between MITS and treatment, numbers of sutures, length of surgery, preoperative weight gain, postoperative weight loss or histological score. On the day of surgery the median serum concentration of adalimumab was 5.4 μg/ml (3.4–8.6). Conclusion: Repeated preoperative treatment with adalimumab had no significant influence on MITS or histological score in anastomoses in the small intestine of the rabbits.