中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (26): 4147-4152.doi: 10.12307/2022.816

• 骨组织构建 bone tissue construction • 上一篇    下一篇

补肾健脾活血方干预骨质疏松模型大鼠骨代谢、氧化应激及自噬的变化

米健国1,乔荣勤2,刘少津3   

  1. 1广东江门中医药职业学院,广东省江门市  529000;2广州中医药大学第三附属医院,广东省广州市  510240;3广州中医药大学,广东省广州市  510405
  • 收稿日期:2020-12-24 接受日期:2021-03-03 出版日期:2022-09-18 发布日期:2022-03-07
  • 通讯作者: 刘少津,硕士,医师,广州中医药大学,广东省广州市 510375
  • 作者简介:米健国,男,1978年生,吉林省洮南市人,汉族,2006年贵阳中医学院毕业,硕士,副教授,副主任中医师,主要从事中医药防治骨科疾病的研究。
  • 基金资助:
    国家自然科学基金资助项目(81673786),项目参与人:乔荣勤

Bushen Jianpi Huoxue Recipe improves bone metabolism, oxidative stress, and autophagy in osteoporotic rats

Mi Jianguo1, Qiao Rongqin2, Liu Shaojin3   

  1. 1Guangdong Jiangmen Chinese Medical College, Jiangmen 529000, Guangdong Province, China; 2The Third Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510240, Guangdong Province, China; 3Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China)
  • Received:2020-12-24 Accepted:2021-03-03 Online:2022-09-18 Published:2022-03-07
  • Contact: Liu Shaojin, Master, Physician, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • About author:Mi Jianguo, Master, Associate professor, Associate chief physician, Guangdong Jiangmen Chinese Medical College, Jiangmen 529000, Guangdong Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81673786 (to QRQ [project participant])

摘要:

文题释义:
氧化应激:是指体内氧化与抗氧化作用失衡的一种状态,倾向于氧化,导致中性粒细胞炎性浸润,蛋白酶分泌增加,产生大量氧化中间产物。氧化应激是由自由基在体内产生的一种负面作用,并被认为是导致衰老和疾病的一个重要因素。
自噬:是一种动态的分解代谢过程,与细胞损伤、修复、增殖等密切相关,在细胞应激和环境适应中起重要作用,也是维持细胞内环境稳定性的一种保护机制。它使用溶酶体降解,恢复细胞内损伤、衰老的细胞器和生物分子,并实现蛋白质和能量更新代谢。

背景:氧化应激被认为是骨质疏松发生的最重要的始动因素之一,氧化应激除直接激活经典的线粒体和内质网凋亡途径外,还激活细胞自噬信号通路,而骨质疏松发病中成骨细胞抗氧化功能的调控机制并未被清晰阐述。
目的:探讨补肾健脾活血方改善氧化应激与自噬对骨质疏松大鼠磷脂酰肌醇3-激酶、蛋白激酶B、哺乳动物雷帕霉素靶蛋白的影响。
方法:72只6月龄雌性SD大鼠随机分为假手术组24只及手术组48只,去除卵巢造模;术后3个月两组各取12只检测骨密度及血清中骨钙素、骨特异性碱性磷酸酶、Ⅰ型前胶原N端前肽、骨保护素水平。剩余手术组的36只大鼠分为模型组、补肾健脾活血方组及阿仑膦酸钠组,每组12只,药物组给予相应药物灌胃,假手术组和模型组灌胃等体积生理盐水。12周后处死各组大鼠,双能X射线法检测大鼠腰椎和股骨骨密度,ELISA法测定血清骨代谢指标及氧化应激指标,实时荧光定量PCR检测股骨组织中LC3、Beclin1、ATG5、哺乳动物雷帕霉素靶蛋白的mRNA表达情况,Western blot法检测磷脂酰肌醇3-激酶、磷酸化蛋白激酶B、哺乳动物雷帕霉素靶蛋白的蛋白表达情况。
结果与结论:①造模3个月及药物干预3个月后,与假手术组比较,模型组大鼠骨密度及骨保护素表达水平明显降低(P < 0.05),骨钙素、骨特异性碱性磷酸酶、Ⅰ型前胶原N端前肽表达水平明显升高(P < 0.05);②药物干预3个月后,与假手术组比较,模型组丙二醛、活性氧表达水平明显升高(P < 0.05);LC3、Beclin1、ATG5的mRNA表达水平显著升高(P < 0.05);过氧化氢酶、超氧化物歧化酶及哺乳动物雷帕霉素靶蛋白mRNA、磷脂酰肌醇3-激酶、磷酸化蛋白激酶B、哺乳动物雷帕霉素靶蛋白表达水平显著降低(P < 0.05);③药物干预3个月后,与模型组比较,补肾健脾活血方组、阿仑膦酸钠组的上述指标均显著改善(P < 0.05);④提示补肾健脾活血方能够改善绝经后骨质疏松骨代谢、氧化应激水平并抑制自噬,其机制可能和参与了磷脂酰肌醇3-激酶-蛋白激酶B-哺乳动物雷帕霉素靶蛋白信号通路的调控有关。
缩略语:磷脂酰肌醇3-激酶:phosphatidylinositol 3-kinase,PI3K;蛋白激酶B:protein kinase B,AKT;哺乳动物雷帕霉素靶蛋白:mammalian target of rapamycin,mTOR

https://orcid.org/0000-0001-7629-2191 (米健国) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 补肾健脾活血方, 氧化应激, 自噬, 骨代谢, PI3K/AKT/mTOR信号通路

Abstract: BACKGROUND: Oxidative stress is considered to be one of the most important initiating factors for osteoporosis. In addition to directly activating classic mitochondrial and endoplasmic reticulum apoptosis pathways, oxidative stress can also activate an autophagy signaling pathway. The regulatory mechanism underlying the antioxidant function of osteoblasts in osteoporosis has not been clearly clarified.
OBJECTIVE: To explore the effect and mechanism of Bushen Jianpi Huoxue Recipe on phosphatidylinositol 3-kinase, protein kinase B, and mammalian target of rapamycin in osteoporotic rats by improving oxidative stress and autophagy.
METHODS: Seventy-two 6-month-old female Sprague-Dawley rats were randomly divided into a sham operation group (n=24) and an operation group (n=48), in which the rat ovaries were removed to make an ovariectomized model. After 3 months, 12 rats were taken from each group for detecting bone mineral density and serum osteocalcin, bone-specific alkaline phosphatase, type I procollagen N-terminal propeptide, and osteoprotegerin levels. The remaining 36 rats in the operation group were divided into model group, Bushen Jianpi Huoxue Recipe group, alendronate vitamin D3 (II) group, with 12 rats in each group. Drug groups were given intragastric administration of corresponding drugs. Sham operation and model groups were given an equal volume of normal saline. After 12 weeks, the rats in each group were sacrificed, and the bone mineral density of the lumbar spine and femur of the rats was detected by dual energy X-ray method. ELISA method was used to measure serum bone metabolism indexes and oxidative stress indexes. Real-time fluorescence quantitative PCR was used to detect the mRNA expression of LC3, Beclin1, ATG5, and mammalian target of rapamycin in femoral tissue. Western blot assay was used to detect the protein expression of phosphatidylinositol 3-kinase, phosphorylated protein kinase B, and mammalian target of rapamycin.
RESULTS AND CONCLUSION: Three months after modeling and drug treatment, compared with the sham operation group, the bone mineral density and osteoprotegerin of the model group were significantly reduced (P < 0.05), and the expression of osteocalcin, bone specific alkaline phosphatase, and type I procollagen N-terminal propeptide were significantly increased (P < 0.05). After 3 months of drug intervention, compared with the sham operation group, the expression levels of malondialdehyde and reactive oxygen species were significantly increased in the model group (P < 0.05), the mRNA expression of LC3, Beclin1 and ATG5 was significantly increased (P < 0.05), the mRNA levels of catalase, superoxide dismutase and mammalian target of rapamycin as well as the protein expression of phosphatidylinositol 3-kinase, phosphorylated protein kinase B, and mammalian target of rapamycin were significantly reduced (P < 0.05). After 3 months of drug interventions, compared with the model group, these indicators were all improved in the Bushen Jianpi Huoxue Recipe group and alendronate vitamin D3 (II) group (P < 0.05). To conclude, Bushen Jianpi Huoxue Recipe can improve postmenopausal osteoporotic bone metabolism, oxidative stress levels and inhibit autophagy, and its mechanism may be involved in the regulation of phosphatidylinositol 3-kinase/protein kinase B/mammalian target of rapamycin signaling pathway.

Key words: Bushen Jianpi Huoxue Recipe, oxidative stress, autophagy, bone metabolism, PI3K/AKT/mTOR signaling pathway

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