持续正加速度对实验性大鼠胃溃疡愈合质量的影响

目的:探讨正加速度(+Gz)对消化性溃疡模型大鼠的溃疡愈合的影响及其机制.方法:将32只♂SD大鼠随机分为对照组、+5Gz组、+10Gz组、和+10Gz+康复新液组,每组8只.采用乙酸烧灼法建立大鼠胃溃疡模型,造模后3d加速度隔日处理1wk,每次持续5min,共4次.+10Gz+康复新液组同时予以康复新液2mL灌胃1wk,1wk后取其组织及血液标本.运用放射免疫法检测胃黏膜前列腺素E2(prostaglanding E2,PGE2)、血清降钙素基因相关肽(calcitonin gene-related peptide,CGRP),运用硝酸还原酶法检测血清一氧化氮(nitric oxide,NO).结果:随+Gz值增高,光镜下再生黏膜厚度变薄,扩张腺体数目增多.大鼠胃黏膜PGE2含量对照组为6.986pg/mL±0.743pg/mL,+5Gz组为5.147pg/mL±0.652pg/mL,+10Gz组为3.438pg/mL±0.908pg/mL,+10Gz+康复新液组为6.133pg/mL±0.545pg/mL.+10Gz组较+5Gz组和对照组低(P<0.01),并且低于+10Gz+康复新液组(P<0.01).大鼠血清(CGRP)含量对照组为82.583pg/mL±11.788pg/mL,+5Gz组为78.333pg/mL±11.290pg/mL,+10Gz组为62.254pg/mL±15.943pg/mL,+10Gz+康复新液组为78.455pg/mL±12.645pg/mL.+10Gz组较+5Gz组和对照组低(P<0.05),并且较+10Gz+康复新液组低(t=-2.252,P<0.05).大鼠血清NO含量对照组为53.806mol/L±9.272mol/L,+5Gz组为47.783mol/L±2.847mol/L,+10Gz组为44.773mol/L±6.858mol/L,+10Gz+康复新液组为53.853mol/L±7.372mol/L.+10Gz组较+5Gz组和对照组低(P<0.05),并且较+10Gz+康复新液组低(t=-2.551,P<0.05).结论:+Gz条件下,溃疡愈合延迟;康复新液灌胃可减轻胃黏膜的损伤,促进溃疡愈合.