Background and Objective: It has been found that human periodontal ligament (hPDL) cells express cannabinoid receptor CB2. However, the functional importance of CB2 in hPDL cells exposed to bacterial endotoxins is not...Background and Objective: It has been found that human periodontal ligament (hPDL) cells express cannabinoid receptor CB2. However, the functional importance of CB2 in hPDL cells exposed to bacterial endotoxins is not known. Here we investigate if the inflammation promoter lipopolysaccharide (LPS) affects CB2 expression and if activation of CB2 regulates LPS-induced pro-inflammatory cytokine production and osteoclastogenic gene expression in hPDL cells. Methods: The hPDL cells were obtained from extracted teeth of periodontally healthy subjects. CB2 expression in hPDL cells exposed to LPS was deter- mined by quantitative real-time PCR analysis. Then, the cells were incubated with or without CB2-specific agonist HU-308 before further stimulation with LPS. In some experiments, the cells were pre-treated with CB2-specific antagonist SR144528. The production of pro-inflammatory cytokines interleukin-1 beta (IL- 1β), interleukin-6 (IL-6) and tumor necrosis factoralpha (TNF-α) was assessed by enzyme-linked immunosorbent assay (ELISA). The mRNA expression of osteoclastogenic genes osteoprotegerin (OPG) and receptor activator of NF-κB ligand (RANKL) was examined using quantitative real-time PCR analysis. Results: CB2 expression in hPDL cells was markedly enhanced by LPS. HU-308 significantly suppressed the production of IL-1β, IL-6 and TNF-α exposed to LPS, whereas SR144528 attenuated this effect. The OPG/RANKL ratio decreased when exposed to LPS, furthermore increased significantly with the addition of HU-308 and finally decreased markedly after pretreatment with SR144528. Conclusion: Our study demonstrated that activation of CB2 had anti-inflammatory and anti-resorptive effects on LPS-stimulated hPDL cells. These findings suggest that activation of CB2 might be an effective therapeutic strategy for the treatment of inflammation and alveolar bone resorption in periodontitis.展开更多
目的研究大麻素Ⅱ型(CB2)受体激活对1-甲基-4-苯基吡啶离子(MPP +)致SH-SY5Y细胞损伤的保护作用。方法 根据药物处理的不同将细胞分为正常对照组(C组)、MPP +组(M组)、JWH-133/MPP +组(J+M组)以及JWH-133/AM630/MPP +组(J+A+M组)。用免...目的研究大麻素Ⅱ型(CB2)受体激活对1-甲基-4-苯基吡啶离子(MPP +)致SH-SY5Y细胞损伤的保护作用。方法 根据药物处理的不同将细胞分为正常对照组(C组)、MPP +组(M组)、JWH-133/MPP +组(J+M组)以及JWH-133/AM630/MPP +组(J+A+M组)。用免疫印迹法检测各组细胞CB2受体和酪氨酸羟化酶(TH)蛋白的表达,用流式细胞仪检测细胞线粒体膜电位(ΔΨm)的变化。结果 与C组相比,M组的CB2受体蛋白表达下降( P <0.01);经JWH-133预处理后,CB2受体蛋白表达高于M组( P <0.01),此作用可被AM630所阻断;与C组相比,M组的TH表达降低( P <0.05),经JWH-133预处理后,TH表达高于M组( P <0.05),AM630预处理可抑制此作用;与C组相比,M组细胞的ΔΨm明显下降( P <0.01),经JWH-133预处理后,细胞ΔΨm下降幅度变小( P <0.01),此作用可被AM630所阻断。结论 CB2受体激活可以抑制MPP +对SH-SY5Y细胞的损伤作用。展开更多
背景:大麻素受体通过与配体结合,调控牙周炎的炎症和骨量,促进牙周组织的愈合,在临床上牙周炎的预防和治疗方面具有重要意义。目的:综述大麻素受体与牙周炎的关系,主要为大麻素Ⅰ型(CB1)受体、大麻素Ⅱ型(CB2)受体与炎症和牙槽骨骨改建...背景:大麻素受体通过与配体结合,调控牙周炎的炎症和骨量,促进牙周组织的愈合,在临床上牙周炎的预防和治疗方面具有重要意义。目的:综述大麻素受体与牙周炎的关系,主要为大麻素Ⅰ型(CB1)受体、大麻素Ⅱ型(CB2)受体与炎症和牙槽骨骨改建的关系,以及涉及的常见细胞信号传导通路,为牙周炎预防和治疗及其在临床其他领域的应用提供思路。方法:检索PubMed、万方数据库、CNKI中国期刊全文数据库1985年7月至2022年7月收录的相关文献。英文检索词为“cannabinoids receptor,CB1 receptor and periodontitis,CB2 receptor and periodontitis,CB1 receptors and bone remodeling,CB2 receptors and bone remodeling,CB1 receptors and signaling pathways,CB2 receptors and signaling pathways”,中文检索词为“大麻素受体,CB1受体和牙周炎,CB2受体和牙周炎,CB1受体和骨改建,CB2受体和骨改建,CB1受体和信号通路、CB2受体和信号通路”,最终纳入107篇文献进行归纳总结。结果与结论:①内源性大麻素系统包含多种受体,其中最具有代表性的为CB1和CB2受体,均属于G蛋白偶联超家族成员;二者在牙周组织中均存在表达;②在天然配体或人工合成激动剂的作用下,大麻素受体可通过不同的代谢通路在体内外产生特定的生理效应,从而调控牙周炎局部的炎症和骨细胞的生成和分化,最终影响炎症和骨量;③进一步研究大麻素受体与牙周炎炎症和牙槽骨骨形成、骨吸收的关系,以及涉及到的常见信号通路——丝裂原活化蛋白激酶(MAPK)信号通路、NF-κB信号通路,为临床上牙周炎的预防和治疗提供新的思路成为目前研究的重点。展开更多
文摘Background and Objective: It has been found that human periodontal ligament (hPDL) cells express cannabinoid receptor CB2. However, the functional importance of CB2 in hPDL cells exposed to bacterial endotoxins is not known. Here we investigate if the inflammation promoter lipopolysaccharide (LPS) affects CB2 expression and if activation of CB2 regulates LPS-induced pro-inflammatory cytokine production and osteoclastogenic gene expression in hPDL cells. Methods: The hPDL cells were obtained from extracted teeth of periodontally healthy subjects. CB2 expression in hPDL cells exposed to LPS was deter- mined by quantitative real-time PCR analysis. Then, the cells were incubated with or without CB2-specific agonist HU-308 before further stimulation with LPS. In some experiments, the cells were pre-treated with CB2-specific antagonist SR144528. The production of pro-inflammatory cytokines interleukin-1 beta (IL- 1β), interleukin-6 (IL-6) and tumor necrosis factoralpha (TNF-α) was assessed by enzyme-linked immunosorbent assay (ELISA). The mRNA expression of osteoclastogenic genes osteoprotegerin (OPG) and receptor activator of NF-κB ligand (RANKL) was examined using quantitative real-time PCR analysis. Results: CB2 expression in hPDL cells was markedly enhanced by LPS. HU-308 significantly suppressed the production of IL-1β, IL-6 and TNF-α exposed to LPS, whereas SR144528 attenuated this effect. The OPG/RANKL ratio decreased when exposed to LPS, furthermore increased significantly with the addition of HU-308 and finally decreased markedly after pretreatment with SR144528. Conclusion: Our study demonstrated that activation of CB2 had anti-inflammatory and anti-resorptive effects on LPS-stimulated hPDL cells. These findings suggest that activation of CB2 might be an effective therapeutic strategy for the treatment of inflammation and alveolar bone resorption in periodontitis.
文摘目的研究大麻素Ⅱ型(CB2)受体激活对1-甲基-4-苯基吡啶离子(MPP +)致SH-SY5Y细胞损伤的保护作用。方法 根据药物处理的不同将细胞分为正常对照组(C组)、MPP +组(M组)、JWH-133/MPP +组(J+M组)以及JWH-133/AM630/MPP +组(J+A+M组)。用免疫印迹法检测各组细胞CB2受体和酪氨酸羟化酶(TH)蛋白的表达,用流式细胞仪检测细胞线粒体膜电位(ΔΨm)的变化。结果 与C组相比,M组的CB2受体蛋白表达下降( P <0.01);经JWH-133预处理后,CB2受体蛋白表达高于M组( P <0.01),此作用可被AM630所阻断;与C组相比,M组的TH表达降低( P <0.05),经JWH-133预处理后,TH表达高于M组( P <0.05),AM630预处理可抑制此作用;与C组相比,M组细胞的ΔΨm明显下降( P <0.01),经JWH-133预处理后,细胞ΔΨm下降幅度变小( P <0.01),此作用可被AM630所阻断。结论 CB2受体激活可以抑制MPP +对SH-SY5Y细胞的损伤作用。
文摘背景:大麻素受体通过与配体结合,调控牙周炎的炎症和骨量,促进牙周组织的愈合,在临床上牙周炎的预防和治疗方面具有重要意义。目的:综述大麻素受体与牙周炎的关系,主要为大麻素Ⅰ型(CB1)受体、大麻素Ⅱ型(CB2)受体与炎症和牙槽骨骨改建的关系,以及涉及的常见细胞信号传导通路,为牙周炎预防和治疗及其在临床其他领域的应用提供思路。方法:检索PubMed、万方数据库、CNKI中国期刊全文数据库1985年7月至2022年7月收录的相关文献。英文检索词为“cannabinoids receptor,CB1 receptor and periodontitis,CB2 receptor and periodontitis,CB1 receptors and bone remodeling,CB2 receptors and bone remodeling,CB1 receptors and signaling pathways,CB2 receptors and signaling pathways”,中文检索词为“大麻素受体,CB1受体和牙周炎,CB2受体和牙周炎,CB1受体和骨改建,CB2受体和骨改建,CB1受体和信号通路、CB2受体和信号通路”,最终纳入107篇文献进行归纳总结。结果与结论:①内源性大麻素系统包含多种受体,其中最具有代表性的为CB1和CB2受体,均属于G蛋白偶联超家族成员;二者在牙周组织中均存在表达;②在天然配体或人工合成激动剂的作用下,大麻素受体可通过不同的代谢通路在体内外产生特定的生理效应,从而调控牙周炎局部的炎症和骨细胞的生成和分化,最终影响炎症和骨量;③进一步研究大麻素受体与牙周炎炎症和牙槽骨骨形成、骨吸收的关系,以及涉及到的常见信号通路——丝裂原活化蛋白激酶(MAPK)信号通路、NF-κB信号通路,为临床上牙周炎的预防和治疗提供新的思路成为目前研究的重点。
