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北京中医药大学 中医学院,北京 100029
黄钲淇,在读硕士,从事中医药治疗消化病研究,E-mail:837300135@qq.com
刘果,博士,副教授,从事中医温病名家学术思想发掘与整理研究,E-mail:liuguo980131@163.com
纸质出版日期:2022-06-20,
网络出版日期:2022-01-11,
收稿日期:2021-10-23,
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黄钲淇,姬永宽,陈国森等.慢溃宁方对溃疡性结肠炎小鼠炎症因子表达及肠道菌群的影响[J].中国实验方剂学杂志,2022,28(12):86-95.
HUANG Zheng-qi,JI Yong-kuan,CHEN Guo-sen,et al.Effect of Mankuining Decoction on Expression of Inflammatory Factors and Intestinal Flora in Mice with Ulcerative Colitis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(12):86-95.
黄钲淇,姬永宽,陈国森等.慢溃宁方对溃疡性结肠炎小鼠炎症因子表达及肠道菌群的影响[J].中国实验方剂学杂志,2022,28(12):86-95. DOI: 10.13422/j.cnki.syfjx.20220601.
HUANG Zheng-qi,JI Yong-kuan,CHEN Guo-sen,et al.Effect of Mankuining Decoction on Expression of Inflammatory Factors and Intestinal Flora in Mice with Ulcerative Colitis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(12):86-95. DOI: 10.13422/j.cnki.syfjx.20220601.
目的
2
探讨慢溃宁方对葡聚糖硫酸钠(DSS)诱导的溃疡性结肠炎(UC)小鼠的治疗作用及可能的作用机制。
方法
2
90只雄性C57BL/6小鼠随机分为正常组、模型组、美沙拉嗪组(0.266 g
·
kg
-1
)、慢溃宁方高、中、低(20、10、5 g
·
kg
-1
)剂量组,每组15只。除正常组外,其余组小鼠自由饮用3% DSS溶液7 d复制UC模型,造模当天同时灌胃给药治疗,模型组、正常组给予等体积0.9%生理盐水,每日1次,共7 d。每天记录小鼠一般情况,进行疾病活动指数(DAI)评分。第8天采用颈椎脱臼法处死小鼠,收集所有结肠和粪便,记录结肠长度,苏木素-伊红(HE)染色观察结肠组织病理学变化,酶联免疫吸附测定法(ELISA)检测结肠组织中炎症因子的含量,16S rRNA测序技术检测小鼠粪便肠道菌群的变化。
结果
2
与正常组比较,模型组小鼠结肠黏膜损伤严重,结肠长度显著缩短(
P
<
0.01),DAI升高(
P
<
0.01),结肠中白细胞介素-10(IL-10)、转化生长因子-
β
1
(TGF-
β
1
)降低(
P
<
0.01),白细胞介素-1
β
(IL-1
β
)、白细胞介素-6(IL-6)、白细胞介素-17
α(
IL-17
α
)、肿瘤坏死因子-
α
(TNF-
α
)显著升高(
P
<
0.01),肠道菌群丰度、多样性降低;与模型组比较,美沙拉嗪组、慢溃宁方高、中、低剂量组结肠黏膜损伤减轻,结肠长度均有所恢复(
P
<
0.01),第5天开始,DAI显著降低(
P
<
0.01),结肠IL-10、TGF-
β
1
显著升高(
P
<
0.01),IL-1
β
、IL-6、IL-17
α
、TNF-
α
明显降低(
P
<
0.05,
P
<
0.01),肠道菌群丰度及多样性升高,厚壁菌门和AKK菌属、杜氏杆菌属、布劳特氏菌属丰度增加,拟杆菌门和Muribaculaceae、梭状芽孢杆菌属UCG-014、理研杆菌属丰度减少。
结论
2
慢溃宁方在改善UC小鼠的症状上疗效确切,与中药浓度呈剂量依赖性,且不同浓度对菌群结构有不同的影响,其作用机制可能是通过改善肠道菌群紊乱进而恢复肠道免疫平衡,从而促进结肠黏膜恢复。
Objective
2
To investigate the therapeutic effect and the possible mechanism of Mankuining decoction on dextran sulfate sodium (DSS)-induced ulcerative colitis (UC) in mice.
Method
2
A total of 90 male SPF C57BL/6 mice were randomly classified into normal group, model group, mesalazine group (0.266 g
·
kg
-1
), and high-, and medium-, low-dose (20, 10, 5 g
·
kg
-1
) Mankuining decoction groups, with 15 rats in each group. Mice, except the normal group, drank 3% DSS solution for 7 days to induce UC, and administration (
ig
) started on the day of modeling. The model group and the normal group were given equivalent amount of 0.9% normal saline once a day for 7 days. The general conditions of mice were recorded every day and the disease activity index (DAI) was calculated. On the 8
th
day, mice were killed by cervical dislocation. All the colons and feces were collected. The length of colon was recorded, and the histopathological changes of colon were observed based on hematoxylin-eosin (HE) staining. The content of inflammatory factors in colon was detected by enzyme-linked immunosorbent assay (ELISA), and the changes of intestinal flora in mouse feces were determined based on 16SrRNA sequencing.
Result
2
Compared with the normal group, the model group had severe colon damage, reduction in colon length (
P
<
0.01), increase in DAI (
P
<
0.01), decrease in interleukin-10 (IL-10) and transforming growth factor-
β
1
(TGF-
β
1
) in colon(
P
<
0.01), rise of interleukin-1
β
(IL-1
β
), interleukin-6 (IL-6), interleukin-17
α
(IL-17
α
), and tumor necrosis factor-
α
(TNF-
α
) in colon (
P
<
0.05,
P
<
0.01), and decrease in abundance and diversity of intestinal flora. Compared with the model group, mesalazine and high-, medium-, low-dose Mankuining decoction alleviated the colon injury, recovered the length of colon (
P
<
0.01), decreased DAI (
P
<
0.01), increased IL-10 and TGF-
β
1
in colon (
P
<
0.01), and decreased IL-1
β
, IL-6, IL-17
α
, and TNF-
α
in colon (
P
<
0.01). Moreover, they raised the abundance and diversity of intestinal flora compared with the model group, as manifested by the increase in the abundance of Firmicutes,
Akkermansia
,
Dubosiella
, and
Blautia
and the decrease in the abundance of Bacteroidetes,
Muribaculaceae
,
Clostridia_UCG-014
, and
Alistipes
.
Conclusion
2
Mankuining decoction has definite effect in treating UC mice, and the effect is positively correlated with the concentration. In addition, different concentration has different influence on the structure of flora. The mechanism is the likelihood that it alleviates the disorder of intestinal flora to restore intestinal immune balance and further promote the recovery of colonic mucosa.
溃疡性结肠炎肠道菌群慢溃宁方炎症因子高通量测序
ulcerative colitisintestinal floraMankuining decoctioninflammatory factorshigh-throughput sequencing
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