FTY720-induced lymphocyte apoptosis inhibits acute graft versus host disease in rat small bowel transplantation / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate the effect and mechanism of FTY720 on acute graft versus host disease (GVHD) in rat small bowel transplantation (SBTx).</p><p><b>METHODS</b>Heterotopic SBTx was performed using a parent (WF)-into-F1 (WFxACI) rat combination. Recipient rats were divided into experimental group (n=6) and control group (n=6). Rats in the experimental group were administered with FTY720 at 0.5 mg/kg for 14 days. Lymphocyte apoptosis in the liver and the mucosa of intestine and graft was detected by TUNEL and flow cytometry 15 days after transplantation. Recipient survival and lymphocyte apoptosis were compared between the two groups.</p><p><b>RESULTS</b>Recipients in the control group died of GVHD after a mean survival time of (16+/-2.1) days. FTY720-treated recipients had a significantly longer survival (>100 days). After administration of FTY720, the percentage of apoptotic lymphocytes was significantly increased in the graft as compared to that in the control group by flow cytometry. The ratio of apoptotic lymphocyte in the liver and graft was also significantly higher in the experimental group by TUNEL.</p><p><b>CONCLUSION</b>FTY720 effectively induces the lymphocyte apoptosis, inhibits the lesion of target tissues by GVHD, and prolongs the recipient survival.</p>

Alternation and significance of CD4(+)CD45RA(+) and CD4(+)CD45RO(+) T cells in peripheral blood of colorectal cancer patients / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the alternation and significance of CD4(+)CD45RA(+) T cells and CD4(+)CD45RO(+) T cells in peripheral blood of colorectal cancer patients.</p><p><b>METHODS</b>The expression of CD4(+) T cells, CD4(+)CD45RA(+) T cells and CD4(+)CD45RO(+) T cells in peripheral blood of 60 colorectal cancer patients were detected with flow cytometry pre-operatively and 1, 3 months post-operatively, compared with those of 10 healthy persons.</p><p><b>RESULTS</b>CD4(+) T cells expression of colorectal cancer patients was the same as the healthy persons. The proportion of CD4(+)CD45RO(+) T cells of colorectal cancer patients was higher, which descended post-operatively, especially in Dukes A and B patients, while CD4(+)CD45RA(+) T cells showed the opposite findings.</p><p><b>CONCLUSION</b>CD4(+)CD45RA(+) T cells and CD4(+)CD45RO(+) T cells, playing an important immune effect in colorectal cancer patients, is closely related to stage and prognosis.</p>