畜牧兽医学报 ›› 2018, Vol. 49 ›› Issue (5): 1047-1053.doi: 10.11843/j.issn.0366-6964.2018.05.020

• 临床兽医 • 上一篇    下一篇

钙螯合羊骨胶原多肽抑制骨质疏松发生的RANK/RANKL/OPG信号机制

韩克光1, 申勇涛1, 原恺1, 范华2, 陈静1, 金淑秀1, 古少鹏1, 田文霞1, 张鼎1, 霍乃蕊1*, 常泓3*   

  1. 1. 山西农业大学动物科技学院, 太谷 030801;
    2. 山西农业大学实验中心, 太谷 030801;
    3. 山西农业大学生命科学院, 太谷 030801
  • 收稿日期:2017-10-09 出版日期:2018-05-23 发布日期:2018-05-23
  • 通讯作者: 霍乃蕊,女,山西平遥人,博士,教授,主要从事动物疾病预防与动物性食品安全研究,E-mail:tgnrhuo@163.com;常泓,女,山西榆次人,博士,教授,主要从事食品安全和分子生物学研究,E-mail:941004578@qq.com
  • 作者简介:韩克光,男,山西祁县人,副教授,硕士,主要从事兽医药物代谢与药效研究,E-mail:sxndkghan@163.com;申勇涛,山西黎城人,硕士生,主要从事兽医公共卫生研究,E-mail:2292192900@qq.com
  • 基金资助:

    国家自然科学基金(31201347);山西省回国留学人员项目(2014-042)

Regulation of RANK/RANKL/OPG Signal Pathway by Calcium Chelated Sheep Bone Collagen Peptide in Inhibiting the Occurrence of Osteoporosis

HAN Ke-guang1, SHEN Yong-tao1, YUAN Kai1, FAN Hua2, CHEN Jing1, JIN Shu-xiu1, GU Shao-peng1, TIAN Wen-xia1, ZHANG Ding1, HUO Nai-rui1*, CHANG Hong3*   

  1. 1. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China;
    2. Shanxi Agricultural University Experimental Center, Taigu 030801, China;
    3. College of Life Science, Shanxi Agricultural University, Taigu 030801, China
  • Received:2017-10-09 Online:2018-05-23 Published:2018-05-23

摘要:

OPG/RANKL/RANK信号通路在破骨细胞形成过程中起着至关重要的作用,本研究将探讨钙螯合羊骨胶原多肽(SBCP-Ca)对骨质疏松(OP)发生的抑制作用及其基于OPG/RANKL/RANK信号通路的作用机制。通过摘除大鼠双侧卵巢建立OP模型,SBCP-Ca (100 mg·mL-1)的灌胃剂量为10 mL·(kg·d)-1,持续8周。试验期结束后,股骨远端干骺端扫描电镜观察结果表明OP造模成功。模型组大鼠血液中反映骨形成和吸收的PINP和β-CTx水平均极显著高于假手术组(P<0.01),股骨中的钙含量和羟脯氨酸含量则极显著低于假手术组(P<0.01)。SBCP-Ca组的血清PINP、β-CTx水平则与假手术组无显著差异(P>0.05),股骨中的钙含量和羟脯氨酸含量极显著高于模型组(P<0.01)。荧光定量PCR结果表明模型组股骨组织中RANKRANKL相对转录水平均极显著高于假手术组(P<0.01),骨质疏松对OPG的表达没有显著影响。SBCP-Ca组的RANKRANKL极显著低于模型组(P<0.01),OPG水平则极显著高于模型组和假手术组(P<0.01)。以上结果表明:SBCP-Ca可有效抑制OP的发生,通过抑制RANKRANKL表达,促进OPG表达的三重作用来抑制破骨细胞的形成和骨吸收活性。

Abstract:

OPG/RANKL/RANK signal pathway plays critical roles in the formation of osteoclasts. Inhibitive roles of calcium chelated sheep bone collagen peptide (SBCP-Ca) in the development of osteoporosis (OP) and its mechanism based on the OPG/RANKL/RANK signal pathway were investigated in this study. OP models of SD rats were established by bilateral ovariectomy. SBCP-Ca (100 mg·mL-1) was intragastrically administered at 10 mL·(kg·d)-1 for 8 weeks. After treatment, scanning electron microscopy for metaphysis of distal femur showed that OP models were successfully established. The serum levels of PINP and β-CTx, which reflected bone formation and bone resorption respectively, were significantly higher in model group (P<0.01), while the calcium and proline contents in femur bone were significantly lower than the sham group (P<0.01).The levels of PINP and β-CTx in SBCP-Ca group showed no statistical differences compared with the sham group (P>0.05), both Ca and proline content were higher than that of the model group (P<0.01). The results of real-time PCR suggested that the relative mRNA levels of RANK and RANKL in model group were significantly higher than that of the sham group (P<0.01), while the expression of OPG showed no significant changes. The results showed that the transcriptional levels of RANK and RANKL were significantly lower in SBCP-Ca group than that of the model group(P<0.01), and the OPG level was significantly higher than that of the other groups(P<0.01). It can be concluded that SBCP-Ca could inhibit the occurrence of osteoporosis effectively by inhibiting the expression of RANK and RANKL, and promoting the expression of OPG in bone tissue. The triple actions of SBCP-Ca inhibited the formation and the resorption activity of osteoclasts.

中图分类号: