摘要目的 研究急性胰腺炎(AP)时是否存在CD4+、CD8+细胞亚群的改变及高压氧治疗对其影响,并同时观察治疗7 d后的电镜超微结构变化.方法 56只大鼠随机分为急性胰腺炎高压氧治疗组(治疗组24只),急性胰腺炎空白对照组(对照组24只)和急性胰腺炎假手术组(假手术组8只),其中对照组和治疗组均采用胰管结扎的方法制备胰腺炎模型,造模后每组再随机分为三个亚组:每个亚组8只,分别在造模后1 d,3 d,7 d处死,且治疗组进行高压氧干预,假手术组仅进行开腹关腹手术.两组均留取胰腺组织标本及血液样本.使用流式细胞仪进行T细胞亚群分析.了解高压氧对急性胰腺炎T细胞亚群的影响.同时进行胰腺细胞电镜检查进行细胞核,线粒体,粗面和滑面内质网评分,了解超微结构变化.结果 对照组CD4+细胞的减少和CD4+/CD8+细胞比值的明显降低.高压氧治疗7 d后,治疗组的CD4+细胞及CD4+/CD8+细胞比值明显升高,且电镜下胰腺组织在细胞核,线粒体,粗面和滑面内质网等评分均较对照组明显改善,胰腺内分泌部的酶原颗粒也较未进行高压氧治疗的对照组明显增多.结论 高压氧治疗能改善急性胰腺炎组织的氧供,调节T细胞免疫功能.

abstractsObjective To investigate the effect of hyperbaric oxygen therapy on T-lymphocyte subpopulations in rats with acute pancreatitis. Methods 56 rats were randomly divided into three groups the sham group ( n = 8 ),control group( n = 24) and hyperbaric oxygen therapy group( treatment group, n = 24), then the control group and treatment groups were divided into three subgroups of 8 rats each undergoing euthanasia on days 1,3,7 after the acute pancreatitis induction. The CD4+ ,CD8+ subpopulations of T-lymphocytes in peripheral blood were detected respectively at the fist day and each day of the euthanasia. The sham group was used to make sure that the model was successfully induced. After euthanasia the pancrea was examined using electron microscopy. Results In the control group, the CD4+ cells in AP rats was significantly decreased and the ratio of CD4+/CD8+ also decreased. After 7days of HBO therapy,compared with the control group, the CD4+ lymphocytes of peripheral blood in the treatment group markedly increased( P ＜0.01 ). The CD8+ lymphocytes also increased to a certain extent. And the CD4+/CD8+ ratio of peripheral blood was obviously increased(P ＜0. 01 ). Also more severe pathological changes appeared in the untreated group than in the treatment group. Conclusion Hyperbaric oxygen therapy could improve the oxygen supply in acute panereatitis, regulate T cell immune function.