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辽宁中医药大学,沈阳 110032
刘立萍,博士,副教授,硕士生导师,从事方药理论与效用机制研究,Tel:024-31207104,E-mail:fangji2013@163.com
谷松,博士,教授,博士生导师,从事张仲景学术思想研究,Tel:024-31207071,E-mail:songgu03@sohu.com
收稿日期:2019-02-24,
网络出版日期:2019-06-19,
纸质出版日期:2019-10-20
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刘立萍, 李然, 姜楠, 等. 基于肠道菌群探讨苓桂术甘汤对瘦素缺陷代谢紊乱模型小鼠的骨保护作用[J]. 中国实验方剂学杂志, 2019,25(20):19-24.
Li-ping LIU, Ran LI, Nan JIANG, et al. Protective Effect of Linggui Zhugan Tang on Bone Injury in ob/ob Mice Based on Gut Microbiota[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(20): 19-24.
刘立萍, 李然, 姜楠, 等. 基于肠道菌群探讨苓桂术甘汤对瘦素缺陷代谢紊乱模型小鼠的骨保护作用[J]. 中国实验方剂学杂志, 2019,25(20):19-24. DOI: 10.13422/j.cnki.syfjx.20191904.
Li-ping LIU, Ran LI, Nan JIANG, et al. Protective Effect of Linggui Zhugan Tang on Bone Injury in ob/ob Mice Based on Gut Microbiota[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(20): 19-24. DOI: 10.13422/j.cnki.syfjx.20191904.
目的:
2
观察苓桂术甘汤对瘦素缺陷代谢紊乱模型小鼠肠道菌群的影响,探讨其骨保护作用是否与其调节肠道菌群有关。
方法:
2
采用ob/ob小鼠,实验分为正常组,模型组,苓桂术甘汤组(7.7 g·kg
-1
),阿托伐他汀组(0.002 6 g·kg
-1
),每组8只。连续灌胃4周后,采用苏木素-伊红(HE)染色观察股骨和小肠组织形态,蛋白免疫印迹法(Western blot)检测股骨组织碱性磷酸酶(ALP)蛋白表达,免疫荧光法检测小肠法尼醇X受体(FXR)蛋白表达,酶联免疫吸附测定(ELISA)法测定血清白细胞介素-6(IL-6)含量,16S 核糖体RNA(16S rRNA)测序进行小鼠肠道菌群分析。
结果:
2
与正常组比较,模型组股骨骨小梁变细,骨髓腔脂肪浸润,股骨ALP蛋白下调;小肠上皮损伤,小肠FXR蛋白下调;血清IL-6含量升高;肠道菌群结构发生变化,在门水平,厚壁菌门(Firmicutes)丰度升高(
P
<
0.01),拟杆菌门(Bacteroidetes)丰度降低(
P
<
0.01),在属水平,毛螺菌属(
Lachnospiraceae
)_UCG-001丰度升高(
P
<
0.05),norank_f__拟杆菌属(
Bacteroidales
)_S24-7_group丰度降低(
P
<
0.01);
Lachnospiraceae
_UCG-001与体质量正相关(
r
=0.661),norank_f__
Bacteroidales
_S24-7_group与体质量负相关(
r
=-0.622)。与模型组比较,苓桂术甘汤改善股骨和小肠组织形态,上调股骨ALP和小肠FXR表达,降低血清IL-6含量,可以逆转属水平的菌群改变(
P
<
0.05)。
结论:
2
瘦素缺陷代谢紊乱模型小鼠出现骨损伤、肠道菌群紊乱和肠上皮损伤;苓桂术甘汤对瘦素缺陷代谢紊乱模型小鼠的骨损伤具有保护作用,其作用机制可能与其调节肠道菌群有关。
Objective:
2
To observe the effect of Linggui Zhugan Tang on gut microbiota in ob/ob mice
in order to explore whether its bone protective effect is related to its regulatory effect of gut microbiota.
Method:
2
The ob/ob mice were divided into control group
model group
Linggui Zhugan Tang group
and Atorvastatin group. After administration for 4 weeks
morphological changes in intestine and bone were observed by htoxylin eosin(HE) staining. The protein expression of alkaline phosphatase(ALP) was detected by Western blot in bone. The expression of farniol X receptor(FXR) was detected by in immunofluorescence staining. And the content of interleukin-6(IL-6) in serum was analyzed by the enzyme-linked immunosorbent assay(ELISA) method. Gut microbiota was analyzed by 16S rRNA.
Result:
2
Compared with control group
the trabecular bone of the femur became thinner
the bone marrow cavity was infiltrated with fat
and the epithelium of the small intestine was damaged in the model group. The protein expressions of ALP and FXR decreased
while the content of IL-6 in serum was increased in the model group. Compared with model group
the protein expressions of ALP and FXR increased
while the content of IL-6 in serum was decreased in the Linggui Zhugan Tang group. At the genus level
compared with control group
the abundance of
Lachnospiraceae
_UCG-001 increased (
P
<
0.05)
while that of norank_f__
Bacteroidales
_S24-7_group decreased in model group (
P
<
0.01).
Lachnospiraceae
_UCG-001 was positively correlated with the weight of body (
r
=0.661)
while norank_f__
Bacteroidales
_S24-7_group was negatively correlated with the weight of body (
r
=-0.622).
Conclusion:
2
Linggui Zhugan Tang has a protective effect on bone injury in ob/ob mice
and its mechanism may be related to its regulation of gut microbiota.
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