吗啡抑制人外周血TNF-α和IL-6的表达的研究

目的：研究吗啡对人外周血中肿瘤坏死因子－α（TNF-α）和白细胞介素－6（IL－6）含量的影响，探讨其对免疫炎症反应的可能机制。方法：全血收集在试管内，分装在EP管中，每管取100μl全血。实验分为吗啡200mg.L^-1组（A1组）、吗啡2mg.L^-1组（A2组）、吗啡200mg.L^-1＋脂多糖（LPS）（B1组）、吗啡2mg.L^-1组＋LPS（B2组）、对照组（C1组）和LPS组（C2组）共6组（n=7）。各组加入上述试剂，用PBS补齐体积后，在37℃下孵育6h。用ELISA检测血清中TNF－α和IL－6含量。结果：单独药物组（A1和A2组）TNF－α的浓度分别为240和251ng.L^-1与空白对照组（C1组，TNF－α的浓度为279ng.L^-1）比较，无显的统计学意义（P＞0．05）；IL－6的浓度分别为444、490和561ng.L^-1，亦无统计学意义（P＞0．05），激活组（B1和B2组）和LPS组（C2组）分别为490、534和1226ng.L^-1（TNF－α）；1177、1310和1563ng.L^-1（IL－6）。且B1组低于B2组。结论：吗啡对静息状态下TNF－α的表达无影响，但可抑制LPS诱导的TNF－α表达，且高剂量的吗啡对LPS诱导的TNF－α的抑制作用大于低剂量吗啡的作用。

Morphine suppresses proinflammatory cytokine production in human whole blood in vitro

AIM:To study the effects of morphine on tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) production in human whole blood and the possible mechanism. METHODS: The seven human whole blood samples were collected, and each was aliquoted in six tubes. A total of 100 μl of whole blood was added with morphine sulfate (200 mg*L-1 and 2 mg*L-1). Then lipopolysaccharide (LPS) (100 μg*L-1) was added to the blood and incubated for 6 h at 37 ℃. Each whole blood was divided into six groups: drug-alone groups (groupA1, morphine 200 mg*L-1; group A2, morphine 2 mg*L-1), activation groups (group B1, morphine 200 mg*L-1+LPS; group B2, morphine 2 mg*L-1+LPS), control group (group C1), and LPS group (group C2). The concentrations of TNF-α and IL-6 in plasma were measured by ELISA. RESULTS: The values of TNF-α production in group A1, A2 and C1 were 240, 251, and 279 ng*L-1 (P>0.05), respectively; the values of IL-6 were 444, 490, and 561 ng*L-1 (P>0.05), respectively. The cytokine production in groupB1, B2 and C2 were 490, 534 and 1226 ng*L-1 (TNF-α), respectively; 1177, 1310 and 1563 ng*L-1 (IL-6), respectively. The levels in group B1 and B2 were less than that in group C2 (P<0.01, or P<0.05), and the level in B1 was less than that in B2. CONCLUSION: Morphine alone has no effects on TNF-α and IL-6 production, but attenuates LPS-induced TNF-α and IL-6 production, and the high dose of morphine-induced effects on attenuation of TNF-α and IL-6 production increased are more than the low dose.