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1.辽宁中医药大学教学实验中心,沈阳 110847
2.辽宁中医药大学实验动物中心,沈阳 110847
高级实验师,硕士。研究方向:经方药理学。电话:024-31207016。E-mail:tgsy2018@163.com
收稿日期:2022-05-30,
修回日期:2022-11-09,
纸质出版日期:2022-12-30
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陈靖,梁喜才,王健,等.基于肠脑轴探讨地黄饮子对APP/PS1转基因阳性小鼠神经功能的改善作用及机制[J].中国药房,2022,33(24):2978-2984.
CHEN Jing,LIANG Xicai,WANG Jian,et al.Investigation of the improvement effect of Dihuang yinzi on neurological function of APP/PS1 double transgenic positive mice based on gut-brain axis and its mechanism[J].ZHONGGUO YAOFANG,2022,33(24):2978-2984.
陈靖,梁喜才,王健,等.基于肠脑轴探讨地黄饮子对APP/PS1转基因阳性小鼠神经功能的改善作用及机制[J].中国药房,2022,33(24):2978-2984. DOI: 10.6039/j.issn.1001-0408.2022.24.07.
CHEN Jing,LIANG Xicai,WANG Jian,et al.Investigation of the improvement effect of Dihuang yinzi on neurological function of APP/PS1 double transgenic positive mice based on gut-brain axis and its mechanism[J].ZHONGGUO YAOFANG,2022,33(24):2978-2984. DOI: 10.6039/j.issn.1001-0408.2022.24.07.
目的
2
探讨地黄饮子对
APP/PS
1转基因阳性小鼠神经功能的改善作用及可能机制。
方法
2
将
APP
/
PS
1转基因阳性小鼠随机分为
APP
/
PS
1阳性模型组,地黄饮子低、中、高剂量(12、24、48 g/kg,按生药量计)组和西药组(盐酸多奈哌齐0.8 mg/kg),并以
APP
/
PS
1转基因阴性小鼠作为
APP
/
PS
1阴性正常组,每组6只。各药物组小鼠灌胃相应药液,
APP
/
PS
1阳性模型组和
APP
/
PS
1阴性正常组小鼠灌胃同体积生理盐水,每天1次,连续28 d。末次给药后,考察各组小鼠的学习和记忆能力,肠道菌群多样性(仅地黄饮子中剂量组)、海马组织神经细胞病理改变,以及Bcl-2、Bax、脑源性神经营养因子(BDNF)的表达情况。
结果
2
与
APP
/
PS
1阳性模型组比较,地黄饮子中、高剂量组小鼠的逃逸潜伏期显著缩短,穿过原平台次
数显著增加(
P
<0.05)。与其余组比较,地黄饮子中剂量组的Chao1指数更低,Shannon指数更高(
P
<0.05),且其微生物菌群的操作分类单位(OTU)丰度有所降低,优势菌种为梭菌纲
o_Clostridia
_vadinBB60_group、疣微菌
g_UCG_
005。与
APP
/
PS
1阳性模型组比较,地黄饮子中、高剂量组小鼠海马CA1区神经细胞病理改变有所改善,其海马组织中Bcl-2、BDNF蛋白的表达均显著上调,Bax蛋白的表达均显著下调(
P
<0.05)。
结论
2
地黄饮子可增强肠道菌群多样性,改变优势菌种,并能抑制大脑神经细胞凋亡,提高BDNF水平;其作用机制可能是借助肠脑轴来保护神经细胞,从而提高
APP
/
PS
1阳性模型小鼠的学习和认知能力。
OBJECTIVE
2
To investigate the improvement effect of Dihuang yinzi on neurological function of
APP
/
PS
1 double transgenic positive mice and its possible mechanism.
METHODS
2
APP
/
PS
1 double transgenic positive mice were randomly divided into
APP
/
PS
1 positive model group, Dihuang yinzi low-dose, medium-dose and high-dose groups (12, 24, 48 g/kg,by the amount of crude drug), western medicine group (donepezil hydrochloride 0.8 mg/kg);
APP
/
PS
1 transgenic negative mice were included in as
APP
/
PS
1 negative normal group, with 6 mice in each group. Administration groups were given relevant medicine intragastrically;
APP
/
PS
1 positive model group and
APP
/
PS
1 negative normal group were given constant volume of normal saline intragastrically, once a day, for consecutive 28 d. After the last medication, the ability of learning and memory, intestinal flora diversity (only medium-dose group of Dihuang yinzi), pathological changes of neural cells in hippocampus, and the expressions of Bcl-2, Bax and brain-derived neurotrophic factor (BDNF) in mice of each group were investigated.
RESULTS
2
Compared with
APP
/
PS
1 positive model group, escape latency of mice was shortened significantly in Dihuang yinzi medium-dose and high-dose groups, while the times of crossing the platform significantly increased (
P
<0.05). Compared with
APP
/
PS
1 positive model group, Chao1 index of Dihuang yinzi medium-dose group was lower, while Shannon index was higher (
P
<0.05); OTU abundance of microbial flora was decreased to some extent; dominant flora was Clostridia
o
_
Clostridia
_ vadinBB60_ Group, verruca
G
_
UCG
_005. Compared with the
APP
/
PS
1 positive model group, the pathological changes of the nerve cells in the hippocampal CA1 area of mice were improved in the medium-dose and high-dose groups of Dihuang yinzi; the protein expressions of Bcl-2 and BDNF in the hippocampal tissue were significantly increased, while the protein expression of Bax was significantly decreased (
P
<0.05).
CONCLUSIONS
2
Dihuang yinzi can enhance the diversity of flora, change the type of dominant flora, and can inhibit the apoptosis of brain neurons, and increase the level of BDNF; its mechanism may be to protect nerve cells by means of gut-brain axis, thereby improving the learning and memory ability of
APP
/
PS
1 positive model mice.
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