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1.重庆医科大学神经科学研究中心,重庆 400016
2.重庆医科大学基础医学院人体解剖学教研室,重庆 400016
呼文强,Email:2021110050@stu.cqmu.edu.cn,研究方向:肠道雌激素受体与阿尔茨海默病的关联性。
骆世芳,Email:100425@cqmu.edu.cn。
收稿:2024-03-07,
修回:2024-07-15,
录用:2024-08-05,
纸质出版:2025-01-28
移动端阅览
呼文强,杨千嬉,贺桂琼,等.利用CRISPR-Cas9技术探究肠道ERβ对肠源性TPH1和5-HT水平的影响[J].重庆医科大学学报,2025,50(1):37-43.
Hu Wenqiang,Yang Qianxi,He Guiqiong,et al.Exploring the effect of intestinal ERβ on enterogenic TPH1 and 5-HT levels using CRISPR-Cas9 technology[J].Journal of Chongqing Medical University,2025,50(1):37-43.
呼文强,杨千嬉,贺桂琼,等.利用CRISPR-Cas9技术探究肠道ERβ对肠源性TPH1和5-HT水平的影响[J].重庆医科大学学报,2025,50(1):37-43. DOI: 10.13406/j.cnki.cyxb.003636.
Hu Wenqiang,Yang Qianxi,He Guiqiong,et al.Exploring the effect of intestinal ERβ on enterogenic TPH1 and 5-HT levels using CRISPR-Cas9 technology[J].Journal of Chongqing Medical University,2025,50(1):37-43. DOI: 10.13406/j.cnki.cyxb.003636.
目的
2
探索C57BL/6J小鼠结肠上皮雌激素受体β(estrogen receptor β,ERβ)缺失对结肠色氨酸羟化酶-1(TPH1,tryptophan hydroxylase-1)和5-羟色胺(5-hydroxytryptamine,5-HT)水平的影响。
方法
2
利用CRISPR-Cas9技术获得Pvillin-Cre
+/-
小鼠、ERβflox
+/-
小鼠,通过配种繁殖最终获得肠道ERβ敲除纯合子组(ERβflox
-/-
-Pvillin-Cre
+/+
,ERβCKO,
n
=5)、杂合子组(ERβflox
+/-
-Pvillin-Cre
+/+
,ERβCKO
+/-
)(
n
=5)及同窝野生型(wild type,WT)小鼠。取6个月龄和12个月龄的各品系小鼠作为研究对象。结合苏木素-伊红染色(hematoxylin-eosin staining,HE)、酶联免疫吸附试验(enzyme-linked immunosorbent assay,ELISA)、免疫印迹(Western blot,WB)和免疫组化(immunohistochemistry,IHC)方法对各组小鼠肠道形态、肠道ERβ、5-HT和TPH1水平进行检测。
结果
2
基因鉴定验证肠道ERβCKO小鼠成功构建后,WB显示肠道ERβ水平明显下调(
P
<
0.05)。HE显示肠道ERβ敲除后,肠道结构完整性与肠道黏膜上皮的绒毛发育均异常。ELISA结果显示,2个月龄段ERβCKO小鼠肠道5-HT水平较WT组小鼠下降明显(
P
<
0.05),且呈月龄依赖方式。IHC结果显示,各组小鼠肠道均出现TPH1免疫阳性表达,与WT小鼠相比,ERβCKO小鼠肠道TPH1免疫阳性细胞数量减少(
P
<
0.05),免疫阳性物表达量更低(
P
<
0.05),但TPH1未呈现月龄依赖方式。
结论
2
结肠ERβ下调可引起结肠TPH1蛋白和5-HT水平含量降低,继而引发小鼠肠道功能异常,增加患肠道疾病的风险,这为以ERβ为靶点的肠道相关疾病的发病机制提供了实验室依据。
Objective
2
To investigate the effects of colonic epithelial estrogen receptor β(ERβ) deletion on colonic tryptophan hydroxylase-1(TPH1) and 5-hydroxytryptamine(5-HT) levels in C57BL/6J mice.
Methods
2
Pvillin-Cre
+/-
mice and ERβflox
+/-
mice were obtained using CRISPR-Cas9 technology,and intestinal ERβ knockout homozygous(ERβflox
-/-
-Pvillin-Cre
+/+
,ERβCKO,
n
=5),heterozygous(ERβflox
+/-
-Pvillin-Cre
+/+
,ERβCKO
+/-
n
=5),and littermate wild-type(WT) mice were ultimately obtained by mating and breeding. Mice of each strain at 6 and 12 months of age were used for the study. Hematoxylin-eosin staining(HE),enzyme-linked immunosorbent assay(ELISA),Western blotting(WB),and immunohistochemistry(IHC) were used for determining the intestinal morphology and measuring intestinal ERβ,5-HT,and TPH1 levels of mice in each group.
Results
2
After the successful construction of intestinal ERβCKO mice as verified by gene identification,WB showed that intestinal ERβ levels were significantly down-regulated(
P
<
0.05). HE showed abnormalities in intestinal structural integrity and intestinal mucosal epithelial villi development after intestinal ERβ knockdown. ELISA results showed that intestinal 5-HT levels of ERβCKO mice at 6 and 12 months of age were significantly decreased compared with those of WT mice(
P
<
0.05),and the decrease was in a month-a
ge-dependent manner. IHC results showed that TPH1 was expressed in the intestines of mice of all groups. However,ERβCKO mice showed a reduced number of TPH1 immunoreactive cells(
P
<
0.05) and lower expression of immunoreactive substances(
P
<
0.05) compared with WT mice,but the decline in TPH1 was not in a month-age-dependent manner.
Conclusion
2
Down-regulation of colonic ERβ induces a decrease in colonic TPH1 protein and 5-HT levels,which subsequently triggers abnormal intestinal function and increases the risk of developing intestinal diseases in mice. This study is expected to provide a laboratory basis for the pathogenesis of ERβ-targeted intestinal diseases.
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