ABSTRACT
Objective To investigate the effects of trimebutine maleate (TM) on the expression of large conductance calcium-activated potassium channel (BKCa) and ryanodine receptors (RyR)channels at mRNA and protein level in colonic smooth muscle cell of cold restraint stress(CRS)induced rats.Methods A total of 24 Wistar rats were divided into CRS group,CRS with TM group and control group equally.The rats of CRS group were gavaged with 0.9％NaCl (6 ml/kg) daily; the rats of CRS with TM group were gavaged with 15 g/L TM (6 ml/kg) daily and activity was restricted in wire cage at 4 ℃ for two hours,continuously for five days.The rats of control group were gavaged with 0.9 ％ NaCl (6 ml/kg) once without CRS.The amount and characteristics of stool of rats in each group were observed.The colonic smooth muscle was isolated to detect the expression of BKCa and RyR at mRNA and protein level by reverse transcription-polymerase chain reaction (RT-PCR) and Western Blot.Results The median of rats defecation particles of CRS group was six,control group was one and CRS with TM group was five.Compared with control group,the defecation appearance of CRS group and CRS with TM group was looser and wetter observed by naked eyes.Compared with control group,there was no obvious pathological changes in CRS and CRS with TM group.There was no significant difference in the mRNA expression of BKCa and RyR channels between control group and CRS group.Compared with control group,the BKCa expression at mRNA level of CRS with TM group increased 1.45 fold.Compared with control group,the RyR2 expression at mRNA level of CRS with TM group increased 1.32 fold.Compared with control group,the BKCa expression at protein level of CRS with TM group increased 1.39 fold,and there was no RyR2 expression band at protein level.Conclusion TM might affect colonic smooth muscle contraction through the upregulation of BKCa expression at mRNA and protein level and RyR expression at mRNA level.
ABSTRACT
Objective To evaluate the efficacy difference between flupentixol and melitracen combined with conventional medicine and conventional drug alone in the treatment of irritable bowel syndrome (IBS).Methods Studies on flupentixol and melitracen combined with conventional medicine (pinaverium bromide and trimebutine maleate) and conventional medicine alone in the treatment of IBS were collected and reviewed through searching the Chinese Academic Journals Full-text Database,Chinese VIP Full-text Database and PubMed database.After that,the test for homogeneity and the combined effect test were estimated. Results A total of 12 clinical studies on flupentixol and melitracen combined with conventional medicine for four to twelve weeks in the treatment of IBS were collected six studies indicated the homogeneity test of flupentixol and melitracen combined with pinaverium bromide (x2 =1.90,df=5,P=0.86,I2 =0).For the fixed-effect model,the odds ratio was 7.92 and 95％ CI was between 4.85 and 12.95,which suggested the combined therapy was better.The other six studies indicated the homogeneity test of flupentixol and melitracen combined with trimebutine maleate (x2 =5.60,df=5,P =0.35,I2 =10.6 ％).For the fixed-effect model,the odds ratio was 5.91 and 95％ CI was between 4.06 and 8.61,which suggested the combined therapy was better.After merging the 12 studies it indicated the homogeneity test of flupentixol and melitracen combined with conventional medicine (x2 =8.40,df =11,P =0.68,I2 =0).For the fixed effect model,the odds ratio was 6.63 and 95％ CI was between 4.92 and 8.93.Conclusion The efficacy of flupentixol and melitracen combined with conventional medicine in the treatment of IBS was better than that of conventional medicine alone,however,still more high quality trials are needed for further confirmation.