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1.南京中医药大学 基础医学院, 南京 210023
2.南京中医药大学 第一附属医院, 南京 210029
张明玥,在读硕士,从事方剂的配伍理论与临床应用研究,E-mail:1941970689@qq.com
樊巧玲,教授,博士生导师,从事方剂的配伍规律及药效机制研究,Tel:025-85811929,E-mail:scienceuser@163.com
网络出版日期:2020-04-03,
纸质出版日期:2020-06-20
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张明玥,谭峰,叶素敏等.左归丸拆方通过调节β2-AR介导的OPG/RANKL信号通路提高去卵巢大鼠骨密度[J].中国实验方剂学杂志,2020,26(12):49-55.
ZHANG Ming-yue,TAN Feng,YE Su-min,et al.Effect of Decomposed Zuoguiwan Recipes in Improving BMD of Ovariectomized Rats by Regulating OPG/RANKL Pathway Mediated by β2AR[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(12):49-55.
张明玥,谭峰,叶素敏等.左归丸拆方通过调节β2-AR介导的OPG/RANKL信号通路提高去卵巢大鼠骨密度[J].中国实验方剂学杂志,2020,26(12):49-55. DOI: 10.13422/j.cnki.syfjx.20201224.
ZHANG Ming-yue,TAN Feng,YE Su-min,et al.Effect of Decomposed Zuoguiwan Recipes in Improving BMD of Ovariectomized Rats by Regulating OPG/RANKL Pathway Mediated by β2AR[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(12):49-55. DOI: 10.13422/j.cnki.syfjx.20201224.
目的
2
探讨左归丸及其拆方治疗绝经后骨质疏松症(PMOP)的作用机制。
方法
2
去卵巢法建立骨质疏松症模型,将40只SD大鼠平均随机分为假手术组,模型组(0.1 mL·kg
-1
·d
-1
),17
β
-雌二醇组(50 μg·kg
-1
·d
-1
)和左归丸补阳药低、高剂量(0.55,1.1 g·kg
-1
·d
-1
)组。灌胃给药12周后,显微CT(
μ
-CT)检测右侧远端股骨骨密度(BMD)及显微结构;苏木精-伊红(HE)染色观察大鼠股骨形态学变化;酶联免疫吸附法(ELISA)检测大鼠血清中Ⅰ型胶原交联羧基端肽(
β
-CTX)和骨特异性碱性磷酸酶(BALP)浓度;实时荧光定量聚合酶链式反应(Real-time PCR)和蛋白免疫印迹法(Western blot)检测大鼠下丘脑
β
2
-肾上腺素能受体(
β
2
AR),胫骨平台骨保护素(OPG)和核转录因子
-κ
B受体激活因子配体(RANKL)蛋白及mRNA表达水平。
结果
2
与假手术组相比,模型组大鼠BMD显著下降(
P
<
0.01),骨组织形态破坏;血清BALP含量降低,
β-
CTX含量升高(
P
<
0.01);下丘脑
β
2
AR,胫骨RANKL mRNA及蛋白表达量升高(
P
<
0.05,
P
<
0.01),胫骨OPG mRNA及蛋白表达量降低(
P
<
0.05,
P
<
0.01)。治疗后,与模型组比较,各用药组大鼠BMD升高(
P
<
0.01),骨组织形态改善;血清BALP含量升高,
β
-CTX含量降低(
P
<
0.01);下丘脑
β
2
AR,胫骨RANKL mRNA及蛋白表达降低(
P
<
0.05,
P
<
0.01),胫骨平台OPG mRNA和蛋白表达升高(
P
<
0.05,
P
<
0.01)。
结论
2
左归丸拆方中补阳药能通过调节
β
2
AR介导的OPG/RANKL信号通路提高去卵巢大鼠骨密度,“阳中求阴”配伍特点是左归丸治疗PMOP的关键之一。
Objective
2
To investigate the mechanism of decomposed Zuoguiwan(ZGW) recipes in treating ovariectomized osteoporosis rats.
Method
2
Forty Sprague-Dawley female rats were equally and randomly divided into Sham-operated group
ovariectomized model group
positive group
and low and high-dose ZGW groups. After 12 weeks of administration by gavage
the bone mineral density (BMD) of rats' distal femur was measured by micro-CT
the morphology of bone tissue were observed by hematoxylin-eosin staining (HE)
β
-cross-linked c-telopeptide of type Ι collagen (
β
-CTX) and bone-specific alkaline phosphatase (BALP) in serum were detected by enzyme-linked immunosorbent assay (ELISA)
and the mRNA and protein expressions of
β
2
AR
OPG and RANKL were evaluated by Western blot analysis and real-time quantitative polymerase chain reaction (PCR).
Result
2
Compared with Sham-operated group
BMD of rats in ovariectomized model group was decreased (
P
<
0.01)
morphology of bone tissue was destroyed
serum BALP was reduced
while
β
-CTX was boosted (
P
<
0.01),mRNA and protein expressions of OPG in tibia were reduced
while RANKL were increased
and mRNA and protein expressions of
β
2
AR in the hypothalamus were decreased (
P
<
0.05
P
<
0.01). Compared with ovariectomized model group
BMDs of rats in low and high-dose ZGW groups were increased (
P
<
0.01)
morphology of bone tissue was repaired
serum BALP and mRNA and protein expressions of OPG in tibia were up-regulated (
P
<
0.05
P
<
0.01)
whereas serum
β
-CTX and mRNA and protein expressions of
β
2
AR in the hypothalamus and RANKL in tibia were down-regulated (
P
<
0.05
P
<
0.01).
Conclusion
2
Yang-nourishing components in decomposed Zuoguiwan recipes can improve BMD of ovariectomized rats by regulating OPG/RANKL pathway mediated by
β
2
AR. "Seeking Yin in Yang" is a crucial mechanism of Zuoguiwan in treating ovariectomized osteoporosis in rats.
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