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西南交通大学 生命科学与工程学院,成都 610000
Received:07 September 2021,
Published Online:15 November 2021,
Published:20 February 2022
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许青,赵晓芹,刘彦君等.基于“心与小肠相表里”探讨回肠菌群在七圣丸抗阿尔茨海默病中的变化[J].中国实验方剂学杂志,2022,28(04):9-18.
XU Qing,ZHAO Xiao-qin,LIU Yan-jun,et al.Changes in Ileal Flora Induced by Qishengwan in Treatment of Alzheimer's Disease: An Exploration Based on "Interior-Exterior Relationship Between Heart and Small Intestine"[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(04):9-18.
许青,赵晓芹,刘彦君等.基于“心与小肠相表里”探讨回肠菌群在七圣丸抗阿尔茨海默病中的变化[J].中国实验方剂学杂志,2022,28(04):9-18. DOI: 10.13422/j.cnki.syfjx.20220103.
XU Qing,ZHAO Xiao-qin,LIU Yan-jun,et al.Changes in Ileal Flora Induced by Qishengwan in Treatment of Alzheimer's Disease: An Exploration Based on "Interior-Exterior Relationship Between Heart and Small Intestine"[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(04):9-18. DOI: 10.13422/j.cnki.syfjx.20220103.
目的
2
在“心与小肠相表里”理论指导下,探究七圣丸治疗阿尔茨海默病的作用及其对回肠菌群的影响。
方法
2
采用双侧脑室注射
β
-淀粉样蛋白1-42(A
β
1-42
)的方法建立阿尔茨海默病(AD)模型,将大鼠随机分为正常组、假手术组、模型组及七圣丸低、中、高剂量组(5.6,11.2,22.4 g·kg
-1
·d
-1
)和多奈哌齐组(多奈哌齐,0.46 mg·kg
-1
·d
-1
),连续给药28 d后,采用水迷宫实验观察大鼠的空间记忆能力,酶联免疫吸附测定法(ELISA)检测海马组织中的A
β
1-42
和核转录因子-
κ
B(NF-
κ
B),肿瘤坏死因子-
α
(TNF-
α
),白细胞介素-6(IL-6)含量。另取其回肠内容物采用16S rRNA高通量测序技术检测各组大鼠回肠菌群的变化。
结果
2
与正常组和假手术组比较,模型组的大鼠的目标象限停留时间、目标象限穿越次数与平台穿越次数明显降低(
P
<
0.05,
P
<
0.01),海马中的A
β
1-42
含量显著升高(
P
<
0.01),中枢炎症因子NF-
κ
B,TNF-
α
,IL-6水平明显升高(
P
<
0.05,
P
<
0.01)。与模型组比较,七圣丸各给药组可明显回调其空间记忆功能损伤(
P
<
0.05,
P
<
0.01),改善大鼠海马组织的A
β
1-42
沉积(
P
<
0.05,
P
<
0.01),明显降低中枢神经炎症因子表达(
P
<
0.05,
P
<
0.01),对AD大鼠有较好的治疗作用。16S分析结果表明模型组大鼠的回肠菌群结构相对于正常组和假手术组显著偏离,且毛螺菌科 NK4A136(
Lachnospiraceae NK
4
A
136
group
)的丰度显著升高(
P
<
0.01),埃希氏菌-志贺氏菌(
Escherichia-Shigella
)的丰度明显降低(
P
<
0.05,
P
<
0.01)。而七圣丸给药组可显著调节大鼠回肠的菌群结构,同时调节
Lachnospiraceae NK
4
A
136
group
,
Escherichia-Shigella
,瘤胃菌科(Ruminococcaceae)等菌群的相对丰度。
结论
2
七圣丸对阿尔茨海默病有良好的治疗效果,可明显增强AD大鼠的记忆认知能力,其作用机制可能与调节大鼠回肠菌群结构以及
Lachnospiraceae NK
4
A
136
group
,
Escherichia-Shigella
,Ruminococcaceae等菌群的相对丰度,减轻中枢神经炎症反应,降低中枢A
β
1-42
沉积有关。
Objective
2
To explore the effect of Qishengwan on ileal flora during its treatment of Alzheimer's disease (AD) under the guidance of the theory of "interior-exterior relationship between heart and small intestine".
Method
2
The AD model was established by bilateral intraventricular injection of
β
-amyloid 1-42 (A
β
1-42
). The rats were then randomly divided into the blank group, sham-operated group, model group, low-, medium-, and high-dose (5.6, 11.2,22.4 g·kg
-1
·d
-1
) Qishengwan groups, and donepezil (0.46 mg·kg
-1
·d
-1
) group. After medication for 28 successive days, the spatial memory ability of rats was observed in water maze test, and the levels of A
β
1-42
, nuclear transcription factor-
κ
B (NF-
κ
B), tumor necrosis factor-
α
(TNF-
α
), and interleukin-6 (IL-6) in the hippocampus were analyzed by enzyme-linked immunosorbent assay (ELISA). Additionally, the contents of the ileum were collected and subjected to 16SrRNA-sequencing analysis for figuring out the changes in ileal flora.
Result
2
Compared with the blank group and sham-operated group, the model group exhibited significantly reduced stay time in the target quadrant and number of target quadrant and platform crossings (
P
<
0.05
, P
<
0.01) and elevated A
β
1-42
content in the hippocampus (
P
<
0.01) and central inflammatory factors NF-
κ
B, TNF-
α
, and IL-6 (
P
<
0.05
, P
<
0.01). Compared with the model group, Qishengwan at each dose significantly alleviated the impaired spatial memory function (
P<
0.05
, P<
0.01), improved the deposition of A
β
1-42
in the hippocampus of rats (
P<
0.05
, P<
0.01), and reduced the expression of central nervous system inflammatory factors (
P<
0.05
, P<
0.01), thus exerting a good therapeutic effect on AD rats. The 16SrRNA-sequencing analysis results showed that the structure of the ileal flora in the model group was significantly separated from those in the blank group and sham-operated group. The abundance of
Lachnospiraceae NK
4
A
136
group
was significantly increased (
P<
0.01), while that of
Escherichia-Shigella
was reduced (
P
<
0.05
, P
<
0.01). Qishengwan at each dose significantly changed the ileal flora structure and regulated the relative abundance of
Lachnospiraceae NK
4
A
136
group
,
Escherichia-Shigella
, and
Ruminococcaceae
.
Conclusion
2
Qishengwan has a positive therapeutic effect on AD. It can significantly enhance the memory and cognitive abilities in AD rats, which may be related to its regulation of the structure of rat ileal flora and the relative abundance of
Lachnospiraceae NK
4
A
136
group, Escherichia-Shigella,
and
Ruminococcaceae
, the attenuation of the central neuroinflammatory response, and the reduction of central A
β
1-42
deposition.
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