Lactobacillus rhamnosus GG Exacerbates Intestinal Ulceration in a Model of Indomethacin-Induced Enteropathy

Rasha Kamil; Mark Geier; Ross Butler; Gordon Howarth
May 2007
Digestive Diseases & Sciences;May2007, Vol. 52 Issue 5, p1247
Academic Journal
Abstract   Lactobacillus rhamnosus GG (LGG) and Bifidobacterium lactis Bb12 (Bb12) were assessed for their potential to prevent indomethacin-induced ulceration in the small intestine of Sprague-Dawley rats. Rats were gavaged skim milk, LGG, or Bb12 twice daily for 14 days. Between days 7–14, rats were gavaged indomethacin (Indo; 6 mg/kg). At sacrifice, small intestine was scored for ulceration and sampled for histologic, immunohistochemical, and myeloperoxidase (MPO) analyses. Indo+LGG-treated rats exhibited a 2.3-fold increase in MPO activity and a 9.8-fold increase in ulceration area compared to Indo-treated controls; these parameters did not differ significantly between Indo+Bb12 and Indo-treated controls. Crypt cell apoptosis decreased by 82% in Indo+Bb12-treated and 55% in Indo+LGG-treated rats compared to Indo-treated controls. Proliferation increased by 209% in Indo+LGG-treated animals compared to Indo-treated controls. Bb12 did not reduce indomethacin-induced intestinal ulceration, whereas LGG actually increased some indicators of injury. LGG and Bb12, at the doses tested, cannot alleviate indomethacin-induced intestinal injury.


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