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1.江西中医药大学 中医学院,南昌 330004
2.吉安市疾病预防控制中心,江西 吉安 343000
[第一作者] 周国佩,在读硕士,从事中医药与病原性研究,E-mail:1084305016@qq.com
*万红娇,博士,教授,博士生导师,从事中医药与病原性疾病的研究,Tel:0791-8711816,E-mail:Ann.wan@163.com
收稿日期:2019-09-09,
网络出版日期:2019-12-07,
纸质出版日期:2020-05-20
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周国佩, 吴帆, 朱金华, 等. 乌梅丸对2型糖尿病模型大鼠肠道菌群、炎性因子及短链脂肪酸的影响[J]. 中国实验方剂学杂志, 2020,26(10):8-15.
Guo-pei ZHOU, Fan WU, Jin-hua ZHU, et al. Effect of Wumeiwan on Intestinal Microflora, Inflammatory Factor and Short Chain Fatty Acids in Type 2 Diabetic Rats[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(10): 8-15.
周国佩, 吴帆, 朱金华, 等. 乌梅丸对2型糖尿病模型大鼠肠道菌群、炎性因子及短链脂肪酸的影响[J]. 中国实验方剂学杂志, 2020,26(10):8-15. DOI: 10.13422/j.cnki.syfjx.20200605.
Guo-pei ZHOU, Fan WU, Jin-hua ZHU, et al. Effect of Wumeiwan on Intestinal Microflora, Inflammatory Factor and Short Chain Fatty Acids in Type 2 Diabetic Rats[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(10): 8-15. DOI: 10.13422/j.cnki.syfjx.20200605.
目的:
2
研究乌梅丸对2型糖尿病(T2DM)模型大鼠血糖,肠道菌群,肿瘤坏死因子-
α
(TNF-
α
),白细胞介素-10(IL-10)以及肠道菌群发酵膳食纤维产生短链脂肪酸(SCFAs)的影响作用。
方法:
2
以80只SD清洁大鼠作为实验对象,从中随机选取10只为正常组,其余70只以高糖高脂乳剂灌胃8周后联合链脲佐菌素(STZ,35 mg·kg
-1
)腹腔注射建立2型糖尿病大鼠模型,空腹血糖
>
11.10 mmol·L
-1
即为造模成功。将造模未成功的大鼠剔除,余造模成功大鼠随机分为模型组、二甲双胍组、乌梅丸高、中、低剂量组,每组10只。正常组与模型组灌胃(
ig
)生理盐水20 mL·kg
-1
·d
-1
,二甲双胍组
ig
二甲双胍200 mg·kg
-1
·d
-1
,乌梅丸高、中、低剂量组分别
ig
乌梅丸20,10,5 g·kg
-1
·d
-1
。造模和用药前后定期监测大鼠血糖和体质量,用药四周后取血及大鼠粪便。16S-rDNA高通量测序技术对肠道菌群进行基因测序,酶联免疫吸附测定(ELISA)检测大鼠血清炎性因子TNF-
α
,IL-10的水平,气相色谱法检测粪便中乙酸、丙酸、正丁酸的含量。
结果:
2
与正常组比较,模型组体质量下降趋势明显(
P
<
0.01),拟杆菌门(Bacteroidetes),放线菌纲(Actinobacteria),拟杆菌属(
Bacteroides
),梭菌属(
Clostridium
)增加,厚壁菌门(Firmicutes),
δ
-变形菌纲(Deltaproteobacteria),乳酸菌(
Lactobacillus
)降低,空腹血糖、血清TNF-
α
水平显著升高(
P
<
0.01),IL-10水平下降(
P
<
0.01),短链脂肪酸乙酸、丙酸、正丁酸含量降低(
P
<
0.05,
P
<
0.01);与模型组比较,乌梅丸高、中、低剂量组及二甲双胍组体质量下降趋势变缓,Bacteroidetes,Actinobacteria,
Bacteroides
,
Clostridium
降低,Firmicutes,DeltaProteobacteria,
Lactobacillus
增加,空腹血糖、血清TNF-
α
水平下降(
P
<
0.01),IL-10水平上升(
P
<
0.01),乙酸、丙酸、正丁酸含量上升(
P
<
0.05,
P
<
0.01)。
结论:
2
乌梅丸可能通过调节肠道菌群,改善炎症反应,增加短链脂肪酸的含量,以致血糖降低,从而达到对2型糖尿病的防治作用。
Objective:
2
To study the effects of Wumeiwan on blood glucose
intestinal microflora
tumor necrosis factor-
α
(TNF-
α
)
interleukin-10 (IL-10) and dietary fiber fermented by intestinal microflora in type 2 diabetic (T2DM) rats.
Method:
2
Totally 80 SD clean rats were selected as experimental subjects
and 10 of them were randomly selected as the normal group. The remaining 70 rats were given high-sugar and high-fat emulsion for 8 weeks and intraperitoneally injected with streptozotocin (STZ
35 mg·kg
-1
) to establish the rat model of T2DM. The fasting blood glucose higher than 11.10 mmol·L
-1
was considered as a successful model. The rats that were not successfully modeled were removed
and the remaining rats that were successfully modeled were randomly divided into model group
metformin group
high-dose Wumeiwan group
medium-dose Wumeiwan group and low-dose Wumeiwan group
with 10 rats in each group. Normal group and model group received (
ig
) normal saline (20 mL·kg
-1
·d
-1
)
while metformin group (
ig
metformin 200 mg·kg
-1
·d
-1
)
Wumeiwan high
medium and low dose groups (
ig
Wumeiwan 20
10
and 5 g·kg
-1
·d
-1
) received corresponding drugs respectively. Blood glucose and body weight of rats were monitored regularly before and after administration of the drugs. Blood and feces were collected after four weeks of administration.16S-rDNA high-throughput sequencing technology was used for gene sequencing of intestinal flora. Enzyme linked immunoassay (ELISA) was used to detect the serum levels of inflammatory factors TNF-
α
and IL-10 in rats
and the contents of acetic acid
propionic acid and butyric acid in feces were detected by gas chromatography.
Result:
2
As compared with the normal group
the body weight decreased significantly (
P
<
0.01). Bacteroidetes
Actinobacteria
Bacteroides
Clostridium
increased
Firmicutes
Deltaproteobacteria
and
Lactobacillus
decreased
fasting blood glucose and serum TNF-
α
levels increased significantly (
P
<
0.01)
IL-10 level decreased (
P
<
0.01)
and the contents of acetic acid
propionic acid and
n
-butyric acid of short-chain fatty acids decreased(
P
<
0.05
P
<
0.01) in model group. As compared with the model group
the body weight decreased; Bacteroidetes
Actinobacteria
Bacteroides
and
Clostridium
decreased. Firmicutes
DeltaProteobacteria and
Lactobacillus
increased; fasting blood glucose and serum TNF-
α
decreased (
P
<
0.01)
and IL-10 increased (
P
<
0.01)
contents of acetic acid
propionic acid and
n
-butyric acid increased in Wumeiwan high-dose
medium-dose and low-dose groups and metformin group (
P
<
0.05
P
<
0.01).
Conclusion:
2
Wumeiwan may prevent and treat T2DM by regulating intestinal flora
improving inflammatory response
increasing SCFAs content and reducing blood glucose.
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