针刺对膝骨关节炎模型大鼠股四头肌卫星细胞分化和凋亡的影响及其机制
郑曲 , 董宝强 , 林星星 , 张宇 , 关雪峰 , 王超杰 , 韩易言
吉林大学学报(医学版) ›› 2025, Vol. 51 ›› Issue (06) : 1475 -1486.
针刺对膝骨关节炎模型大鼠股四头肌卫星细胞分化和凋亡的影响及其机制
Effect of acupuncture on differentiation and apoptosis of quadriceps muscle satellite cells in knee osteoarthritis model rats and its mechanism
目的 探讨针刺对膝骨关节炎(KOA)模型大鼠股四头肌卫星细胞分化和凋亡的影响,并阐明其相关机制。 方法 选取40只SPF级大鼠随机分为对照组、模型组、塞来昔布组和针刺组,每组10只。对照组大鼠仅切开关节腔后缝合,模型组、塞来昔布组和针刺组大鼠复制KOA模型。测量各组大鼠患肢股骨段最大周长、大鼠体质量和股四头肌湿重,计算各组大鼠股四头肌湿重维持率和股四头肌湿重/体质量比值。HE染色观察各组大鼠关节软骨和股四头肌组织病理形态表现,末端脱氧核苷酸转移酶(TdT)介导的缺口末端标记法(TUNEL)检测各组大鼠关节软骨和股四头肌组织中细胞凋亡指数,免疫荧光法检测各组大鼠股四头肌组织中白细胞介素6(IL-6)、Janus激酶(JAK)及信号转导与转录激活因子3(STAT3)蛋白表达水平,Western blotting 法检测各种大鼠股四头肌组织中IL-6/JAK/STAT3信号通路、肌卫星细胞及凋亡相关蛋白表达水平。 结果 与对照组比较,模型组大鼠患侧后腿围度、股四头肌湿重、湿重维持率和湿重/体质量比值均明显降低(P<0.05);与模型组比较,塞来昔布组和针刺组大鼠患侧后腿围度、股四头肌湿重、湿重维持率和湿重/体质量比值均明显升高(P<0.05);与塞来昔布组比较,针刺组大鼠患侧后腿围度、股四头肌湿重、湿重维持率和湿重/体质量比值均明显升高(P<0.05)。HE染色观察,对照组大鼠膝关节软骨保持完整,软骨细胞聚集且水平排列,边缘平整,股四头肌细胞呈长圆柱状,有序排列,形态规则;模型组大鼠膝关节软骨较薄,边缘粗糙,软骨层数减少,排列无序,股四头肌纤维排列紊乱,部分肌纤维溶解和肌细胞膜损伤,并伴有肌纤维碎片和大量炎症渗出液;塞来昔布组大鼠膝关节软骨形态大体正常,偶见软骨排列不规律和厚度减少,偶尔可见散在的坏死软骨细胞,股四头肌肌纤维和肌膜较为完整,有新生肌纤维的出现,部分肌纤维边缘模糊,伴有少量细胞碎片和轻微炎症浸润;针刺组大鼠膝关节软骨结构保持完整,边缘平滑,偶尔边缘粗糙,软骨细胞聚集且排列有序。TUNEL法检测,与对照组比较,模型组大鼠关节软骨和股四头肌组织中细胞凋亡指数明显升高(P<0.05);与模型组比较,塞来昔布组和针刺组大鼠关节软骨及股四头肌组织中细胞凋亡指数均明显降低(P<0.05);与塞来昔布组比较,针刺组大鼠关节软骨及股四头肌组织中细胞凋亡指数明显降低(P<0.05)。免疫荧光法检测,与对照组比较,模型组大鼠股四头肌组织中IL-6、JAK和STAT3蛋白表达水平均明显降低(P<0.05);与模型组比较,塞来昔布组和针刺组大鼠股四头肌组织中IL-6、JAK及STAT3蛋白表达水平均明显升高(P<0.05);与塞来昔布组比较,针刺组大鼠股四头肌组织中IL-6、JAK和STAT3蛋白表达水平均明显升高(P<0.05)。Western blotting法检测,与对照组比较,模型组大鼠股四头肌组织IL-6、JAK、STAT3、特异性蛋白配对盒转录因子7(Pax7)、肌间线蛋白(Desmin)、肌球蛋白(Myosin)和肌细胞生成素(Myogenin)蛋白表达水平均明显降低(P<0.05);与模型组比较,塞来昔布组和针刺组大鼠股四头肌组织中IL-6、JAK、STAT3、Pax7、Desmin、Myosin和Myogenin蛋白表达水平均明显升高(P<0.05);与塞来昔布组比较,针刺组大鼠股四头肌组织中IL-6、JAK、STAT3、Pax7、Desmin、Myosin和Myogenin蛋白表达水平均明显升高(P<0.05)。与对照组比较,模型组大鼠股四头肌组织中B细胞淋巴瘤2(Bcl-2),B细胞淋巴瘤xl(Bcl-xl)和髓系细胞白血病1(MCL1)蛋白表达水平均明显降低(P<0.05),Bcl-2相关X蛋白(Bax)和半胱氨酸依赖性天冬氨酸特异性蛋白酶3(Caspase-3)蛋白表达水平均明显升高(P<0.05);与模型组比较,塞来昔布组和针刺组大鼠股四头肌组织中Bcl-2、Bcl-xl和MCL1蛋白表达水平均明显升高(P<0.05),Bax和Caspase-3蛋白表达水平均明显降低(P<0.05);与塞来昔布组比较,针刺组大鼠股四头肌组织中Bcl-2、Bcl-xl和MCL1蛋白表达水平均明显升高(P<0.05),Bax和Caspase-3蛋白表达水平均明显降低(P<0.05)。 结论 针刺可促进膝骨关节炎模型大鼠股四头肌卫星细胞分化,并抑制肌细胞凋亡,其机制可能与上调股四头肌组织中IL-6、JAK和STAT3蛋白表达有关。
Objective To discuss the effect of acupuncture on the differentiation and apoptosis of quadriceps muscle satellite cells in model rats with knee osteoarthritis(KOA), and to clarify its related mechanism. Methods A total of 40 SPF-grade rats were selected and randomly divided into control group, model group, celecoxib group, and acupuncture group, with 10 rats in each group. The rats in control group only underwent joint cavity incision followed by suturing, while the rats in model group, celecoxib group, and acupuncture group were used to replicate the KOA models. The maximum circumference of the femoral segment of the affected limb, rat body mass, and quadriceps wet weight of the rats in various groups were measured; the quadriceps wet weight maintenance rate and quadriceps wet weight/body mass ratio of the rats in various groups were calculated. HE staining was used to observe the pathomorphology of articular cartilage and quadriceps muscle tissue of the rats in various groups; terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end labeling (TUNEL) method was used to detect the apoptosis indexes in articular cartilage and quadriceps muscle tissue of the rats in various groups; immunofluorescence method was used to detect the protein expression levels of interleukin-6 (IL-6), Janus kinase (JAK), and signal transducer and activator of transcription 3 (STAT3) in quadriceps muscle tissue of the rats in various groups; Western blotting method was used to detect the expression levels of IL-6/JAK/STAT3 signaling pathway proteins, and muscle satellite cells, and apoptosis-related proteins in quadriceps muscle tissue of the rats in various groups. Results Compared with control group, the affected hind limb circumference, quadriceps wet weight, wet weight maintenance rate, and wet weight/body mass ratio of the rats in model group were significantly decreased (P<0.05); compared with model group, the affected hind limb circumference, quadriceps wet weight, wet weight maintenance rate, and wet weight/body mass ratio of the rats in celecoxib group and acupuncture group were significantly increased (P<0.05); compared with celecoxib group, the affected hind limb circumference, quadriceps wet weight, wet weight maintenance rate, and wet weight/body mass ratio of the rats in acupuncture group were significantly increased (P<0.05). The HE staining results showed that the knee articular cartilage of the rats in control group remained intact, chondrocytes were aggregated and horizontally arranged with smooth edges, and quadriceps muscle cells were long cylindrical, orderly arranged, and regular in shape; in model group, the knee articular cartilage was thinner with rough edges, reduced number of cartilage layers, and disordered arrangement, and the quadriceps muscle fibers were disorganized, with some muscle fiber dissolution and muscle cell membrane damage, accompanied by muscle fiber fragments and a large amount of inflammatory exudate; in celecoxib group, the morphology of knee articular cartilage was generally normal, occasionally with irregular cartilage arrangement and reduced thickness, sporadically visible necrotic chondrocytes, quadriceps muscle fibers and sarcolemma were relatively intact, new muscle fibers appeared, some muscle fiber edges were blurred, accompanied by a small amount of cell debris and mild inflammatory infiltration; in acupuncture group, the knee articular cartilage structure remained intact with smooth edges, occasionally rough edges, and chondrocytes were aggregated and orderly arranged. The TUNEL assay results showed that compared with control group, the apoptosis indexes in articular cartilage and quadriceps muscle tissue of the rats in model group were significantly increased (P<0.05); compared with model group, the apoptosis indexes in articular cartilage and quadriceps muscle tissue of the rats in celecoxib group and acupuncture group were significantly decreased (P<0.05); compared with celecoxib group, the apoptosis index in articular cartilage and quadriceps muscle tissue of the rats in acupuncture group were significantly decreased (P<0.05). The immunofluorescence assay results showed that compared with control group, the expression levels of IL-6, JAK, and STAT3 proteins in quadriceps muscle tissue of the rats in model group were significantly decreased (P<0.05); compared with model group, the expression levels of IL-6, JAK, and STAT3 proteins in quadriceps muscle tissue of the rats in celecoxib group and acupuncture group were significantly increased (P<0.05); compared with celecoxib group, the expression levels of IL-6, JAK, and STAT3 proteins in quadriceps muscle tissue of the rats in acupuncture group were significantly increased (P<0.05). The Western blotting results showed that compared with control group, the expression levels of IL-6, JAK, STAT3, paired box transcription factor 7 (Pax7), Desmin, Myosin, and Myogenin proteins in quadriceps muscle tissue of the rats in model group were significantly decreased (P<0.05); compared with model group, the expression levels of IL-6, JAK, STAT3, Pax7, Desmin, Myosin, and Myogenin proteins in quadriceps muscle tissue of the rats in celecoxib group and acupuncture group were significantly increased (P<0.05); compared with celecoxib group, the expression levels of IL-6, JAK, STAT3, Pax7, Desmin, Myosin, and Myogenin proteins in quadriceps muscle tissue of the rats in acupuncture group were significantly increased (P<0.05). Compared with control group, the expression levels of B-cell lymphoma 2 (Bcl-2), B-cell lymphoma-xl (Bcl-xl), and myeloid cell leukemia 1 (MCL1) proteins in quadriceps muscle tissue in model group were significantly decreased (P<0.05), and the expression levels of Bcl-2-associated X protein (Bax) and cysteinyl aspartate specific proteinase-3 (Caspase-3) proteins were significantly increased (P<0.05); compared with model group, the expression levels of Bcl-2, Bcl-xl, and MCL1 proteins in quadriceps muscle tissue of the rats in celecoxib group and acupuncture group were significantly increased (P<0.05), and the expression levels of Bax and Caspase-3 proteins were significantly decreased (P<0.05); compared with celecoxib group, the expression levels of Bcl-2, Bcl-xl, and MCL1 proteins in quadriceps muscle tissue of the rats in acupuncture group were significantly increased (P<0.05), and the expression levels of Bax and Caspase-3 proteins were significantly decreased (P<0.05). Conclusion Acupuncture can promote the differentiation of quadriceps muscle satellite cells and inhibit muscle cell apoptosis in the model rats with KOA, and the mechanism may be related to the up-regulation of expressions of IL-6, JAK, and STAT3 proteins in the quadriceps muscle tissue.
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科技部国家重点研发计划项目(2021YFC1712800)
中国博士后科学基金会国家资助博士后研究人员计划项目(GZC20231025)
辽宁省教育厅基本科研项目(JYTQN2023458)
辽宁中医药大学中医脏象理论及应用教育部重点实验室开放基金资助项目(zyzx2410)
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