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广州中医药大学 中药学院,广州 510006
冯萌,在读硕士,从事中药内分泌药理学研究,E-mail:18855032051@163.com
周欣欣,教授,硕士生导师,从事中药新药研究与开发工作,E-mail:020465@gzucm.edu.cn
收稿日期:2020-01-13,
网络出版日期:2020-07-21,
纸质出版日期:2020-10-05
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冯萌,党院霞,刘芬等.基于分子对接探究知母皂苷BⅡ对破骨细胞分化过程中的影响[J].中国实验方剂学杂志,2020,26(19):146-152.
FENG Meng,DANG Yuan-xia,LIU Fen,et al.Effect of Anemarrhena AsphodelosideBⅡon Osteoclast Differentiation Based on Molecular Docking[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(19):146-152.
冯萌,党院霞,刘芬等.基于分子对接探究知母皂苷BⅡ对破骨细胞分化过程中的影响[J].中国实验方剂学杂志,2020,26(19):146-152. DOI: 10.13422/j.cnki.syfjx.20201906.
FENG Meng,DANG Yuan-xia,LIU Fen,et al.Effect of Anemarrhena AsphodelosideBⅡon Osteoclast Differentiation Based on Molecular Docking[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(19):146-152. DOI: 10.13422/j.cnki.syfjx.20201906.
目的
2
探究知母皂苷BⅡ(TBⅡ)对破骨细胞分化过程中核转录因子-
κ
B受体活化因子配基(RANKL),RANK,原癌基因(C-FOS)基因表达量的影响。
方法
2
利用分子对接软件LeDock对TBⅡ分别与RANKL,RANK和C-FOS进行分子对接打分。RAW264.7细给予可溶性RANKL(sRANKL)干预,设立空白组,sRANKL组(模型组),淫羊藿苷(Ica)组,TBⅡ低剂量组(2 μmol·L
-1
),TBⅡ中剂量组(4 μmol·L
-1
),TBⅡ高剂量组(8 μmol·L
-1
)。相应试剂盒检测破骨细胞分化的标志性酶(TRAP),实时荧光定量聚合酶链式反应(Real-time PCR)检测C-FOS,与其上游RANKL/RANK和下游活化T细胞核因子胞质1型(NFATC1)表达量,以及骨保护素OPG的表达量。
结果
2
分子对接打分结果分别为-11.86,-11.38,-12.34 kcal·mol
-1
,TBⅡ能够与RANKL,RANK和C-FOS结合。与正常组比较,模型组TRAP含量显著升高(
P
<
0.01);与模型组比较,各给药组显著降低TRAP含量(
P
<
0.01),且TBⅡ呈剂量依赖性降低TRAP含量。与正常组比较,模型组RANKL,RANK,C-FOS,NFATC1表达量显著升高(
P
<
0.01),OPG表达量显著降低(
P
<
0.01);与模型组比较,各给药组显著降低RANKL,RANK,C-FOS,NFATC1表达量(
P
<
0.01),显著升高OPG表达量(
P
<
0.01)。
结论
2
TBⅡ可能通过调控RANKL/RANK/C-FOS信号通路,抑制破骨细胞前体细胞向破骨细胞的分化,抑制破骨细胞活性,减少骨吸收,改善骨质疏松。
Objective
2
To explore the effect of anemarrhena asphodeloside BⅡ (TBⅡ)
on the expressions of nuclear transcription factor-
κ
B receptor activator factor ligand (RANKL)
RANK and C-FOS genes during osteoclast differentiation.
Method
2
Molecular docking software LeDock was used to score the docking of TBⅡ
with RANKL
RANK and C-FOS. RAW264.7 was treated with soluble RANKL(sRANKL) and divided into control group
sRANKL group (model group)
Icariin (Ica) group
low-dose TBIⅡ group (2 μmol·L
-1
)
medium-dose TBⅡ group (4 μmol·L
-1
)
and high-dose TBⅡ group (8 μmol·L
-1
). The corresponding kit was used to detect iconic enzyme (TRAP) of osteoclast differentiation. Total RNA was extracted by trizol method
Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) was used to detect the expressions of C-FOS
upstream RANKL/RANK and downstream nuclear factor of activated T-cells cytoplasmic 1 (NFATC1)
and osteoprotegerin OPG.
Result
2
The molecular docking score were -11.86
-11.38
-12.34 kcal·mol
-1
and there might be multiple binding sites between
TBII
as well as RANKL
RANK and C-FOS. Compared with the control group
the content of TRAP in model group increased significantly (
P
<
0.01)
and compared with model group
the content of TRAP in each administration group decreased significantly (
P
<
0.01)
and TBⅡ decreased the content of TRAP in a dose-dependent manner. Compared with the control group
the expressions of RANKL
RANK
C-FOS and NFATC1 increased (
P
<
0.01)
whereas the expression of OPG decreased (
P
<
0.01) in model group. Compared with model group
the expressions of RANKL
RANK
C-FOS and NFATC1 decreased (
P
<
0.01)
while the expression of OPG increased (
P
<
0.01) in each administration group.
Conclusion
2
TBⅡ may inhibit the differentiation of osteoclast precursors into osteoclasts
inhibit osteoclast activity
reduce bone resorption and improve osteoporosis by regulating RANKL/RANK/C-FOS signal pathway.
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