EFFECT OF SUPPLEMENTATION WITH PROBIOTICS ON COLONIC ANASTOMOSES IN RATS: MORPHOLOGICAL AND TENSIOMETRIC STUDY

ABSTRACT

Background:

The use of probiotics positively modifies the composition and function of intestinal flora, improving the quality of intestinal anastomosis.

Aim:

To evaluate the impact of probiotic use on intestinal anastomosis of rats.

Method:

Thirty-six adult male Wistar rats (Rattus norvegicus albinus, Rodentia Mammalia) were used, with body weight ranging from 220-320 g. The animals were housed and acclimated individually in boxes receiving water and ration ad libitum. After initial acclimatization, the control group received perioperative ration ad libitum for 12 days (seven preoperatively and five postoperatively) associated with the maltodextrin formula at a dose of 250 mg/day in isocaloric and isovolumetric form. Likewise, the probiotic group received oral supplementation of probiotics dose of 250 mg/day, associated with isocaloric and isovolumetric diet. The probiotic chosen for this study was composed of strains (doses 1x10⁹ CFU/g)¹² Lactobacillus paracasei LPC-37, Bifidobacterium lactis HN0019, Lactobacillus rhamnosus HN001 and Lactobacillus acidophilus NCFM. Probiotics or placebo were administered orally with the aid of a dosimeter spatula. Both groups underwent two colostomies, one in the right colon and the second in rectosigmoid, followed by reanastomosis with eight separate 6-0 mononylon stitches. The sacrifice took place on the fifth day. The parameters evaluated included tensile strength, histology and collagen densitometry.

Results:

The rate of intestinal fistula for the control and probiotic groups were, respectively, 22.22% and 11.11% (p=0.6581).Perioperative supplementation with probiotics increased collagen deposition of types I and III (p<0.0001), improved maximum traction force and maximum rupture force, p=0.0250 and p=0.0116 respectively, fibrosis area (p<0.0001), and area of the inflammatory infiltrate (p=0.0115).

Conclusions:

The use of probiotics had a positive impact on the quality of intestinal anastomosis.

HEADINGS:
Probiotic; Wound healing; Colonic anastomosis; Tensiometers; Collagen densitometry; Rats