Objective To investigate the role of GABAAα3and GABAB receptors in the ventrolateral periaqueductal gray in the development of paw acute pain in rats.Methods Twelve male SD rats, weighing 280~320 g, were randomly divided into two groups: normal saline group (group NS), formaldehyde-induced pain group (group F), 6 rats in each group.In group F, rats were subcutaneously injected with 2% formaldehyde 50 μl into the ventral surface of right hind paw to induce periphery inflammatory pain.In group NS, rats were subcutaneously injected with normal saline into the ventral surface of right hind paw.Mechanical threshold was assessed using von Frey hairs for every ten minutes.The rat pain behavior scores were recorded for every five minutes.The thickness of skin and skin temperature were recorded for every fifteen minutes.Results Mechanical hyperalgesia were induced in group F after formalin injection into right hind paw.Compared with group NS, rat pain behavior scores were increased significantly in group F at all time points after injection, mechanical threshold were decreased significantly in group F at 10-60 min after injection, the temperature of the skin and the skin thickness were increased significantly in group F at 15-60 min after injection (P<0.05), the levels of the expression of GABAAα3 and GABAB were significantly increased in group F (P<0.05).Conclusion GABAAα3and GABAB receptors mediates formalin-induced hyperalgesia at ventrolateral portion of the PAG (vlPAG) of rats.

[摘 要] 目的：探讨布托啡诺（BPH）对骨肉瘤（OS）细胞增殖、迁移和侵袭的影响及其相关的作用机制。方法：将MG-63细胞分为对照组、YAP抑制剂组（维替泊芬组）和BPH低、中、高浓度组，MTT法、克隆形成实验、FCM术、划痕愈合实验、Transwell实验、qPCR法、WB法和移植瘤实验分别检测处理后各组细胞的增殖活性、克隆形成数、细胞凋亡率、划痕愈合率，以及上皮钙黏蛋白（E-cadherin）、神经钙黏蛋白（N-cadherin）、波形蛋白（vimentin）mRNA的表达和YAP、TAZ蛋白的表达，同时观察BPH和维替泊芬对移植瘤生长的影响。结果：与对照组相比，维替泊芬组和BPH低、中、高浓度组细胞增殖活性、克隆数、划痕愈合率、侵袭细胞数，以及N-cadherin和vimentin mRNA水平、YAP和TAZ蛋白表达及移植瘤体积均显著降低（均P<0.05），细胞凋亡率、E-cadherin mRNA水平及对移植瘤的抑瘤率均升高（均P<0.05），且BPH高浓度组与维替泊芬组之间各项指标均无明显差异（均P>0.05）。结论：BPH可能通过抑制Hippo/YAP信号通路来抑制OS细胞MG-63增殖、迁移和侵袭。