Effects of neuropathic pain on intestinal pathology and immunoglobulin levels in rats with ulcerative colitis / 临床麻醉学杂志

ABSTRACT

Objective To investigate the effects of spinal nerve ligation (SNL) on the changes of intestinal pathology and the levels of serum immunoglobulin in rats with ulcerative colitis.Methods Thirty-six healthy male rats, weighing 200-220 g, were randomly divided into three groups using the random number table method: spinal nerve ligation model group (group SNL), sham-operationgroup (group Sham) and non-operatedcontrol group (group Con), 12 in each group.After the establishment of SNL models, the three groups were given trinitro-benzene-sulfonic acid (TNBS) to induce ulcerative colitis.The serum level of immunoglobulin (IgG, IgM) were measured on the day before SNL, before TNBS modeling and 7, 14 d after TNBS modeling, respectively.Besides, the intestinal pathology were observed on 7 d after TNBS modeling.Results The basic values of IgM and IgG before operation were not statistically different among three groups.The level of IgG in group SNL was lower than that in group Sham after SNL operation with no significant difference, but the level of IgM was significantly lower than that of group Sham (P<0.05).On 7 d after TNBS modeling, both levels of IgG and IgM in group SNL were significantly lower than those in group Sham and group Con (P<0.01).On 14 d after TNBS modeling, the level of IgG in group SNL was significantly lower than that in group Sham and group Con (P<0.05).Furthermore, the colon lesions were more extensive and the inflammation was more serious in group SNL than those in group Sham and group Con on 7 d after TNBS modeling.Conclusion Neuropathic pain suppress immune activities, reduces the serum level of IgM and IgG and aggravates intestinal inflammation caused by TNBS.