In the present study, the therapeutic effects of Lactobacillus casei Qian (LCQian), the key microorganism in Tibetan yak yoghurt, on activated carboninduced constipation were determined in vivo. ICR mice were treated with LCQian for nine days by oral administration.
The body weight, defecation status, gastrointestinal transit and defecation time of mice were assessed, and the serum levels of motilin (MTL), gastrin (Gas), endothelin (ET), somatostatin (SS), acetylcholinesterase (AChE), substance P (SP) and vasoactive intestinal peptide (VIP) were
further evaluated. Bisacodyl was used as the positive control. The time until the first black stool defecation following carbon intake of the normal, control, 100 mg/kg bisacodyltreated, Lactobacillus bulgaricus (LB)treated, LCQian (L) and LCQian (H)treated mice was
93, 231, 121, 194, 172 and 157 min, respectively. Following treatment with LCQian, the gastrointestinal transit was increased to 52.4% [LCQian (L)] and 65.8% [LCQian (H)], while that in the group treated with the common lactic acid bacteria of LB was 40.3%. The MTL,
Gas, ET, AChE, SP and VIP serum levels were significantly increased and levels of SS were reduced in mice following LCQian treatment compared with those in the control mice (P<0.05). Reverse transcription quantitative polymerase chain reaction indicated that LCQian raised the cKit, GDNF
as well as SCF mRNA expression levels and reduced the TRPV1 and NOS expression levels in tissue of the small intestine in mice. These results suggested that lactic acid bacteria prevent constipation in mice, among which LCQian was the most effective.
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Document Type: Research Article
Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, P.R. China
College of Food Science, Southwest University, Chongqing 400715, P.R. China
Science and Technology Administration, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
Institute of QinghaiTibetan Plateau, Southwest University for Nationalities, Chengdu, Sichuan 610041, P.R. China
Publication date: August 1, 2015
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Molecular Medicine Reports is a monthly, peer-reviewed journal available in print and online, that includes studies devoted to molecular medicine, underscoring aspects including pharmacology, pathology, genetics, neurosciences, infectious diseases, molecular cardiology and molecular surgery. In vitro and in vivo studies of experimental model systems pertaining to the mechanisms of a variety of diseases offer researchers the necessary tools and knowledge with which to aid the diagnosis and treatment of human diseases.
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