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400038 重庆,陆军军医大学(第三军医大学)医学心理系军事认知心理学教研室
[范晓棠,E-mail:fanxiaotang2005@163.com FAN Xiaotang, E-mail:fanxiaotang2005@163.com
收稿:2018-11-12,
修回:2018-12-24,
纸质出版:2019-03-30
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张瑞宇, 刘天曜, 肖锐, 等. 雌激素β受体激动剂改善自闭症模型小鼠的社交缺陷[J]. 第三军医大学学报, 2019,41(6):507-513.
Ruiyu ZHANG, Tianyao LIU, Rui XIAO, et al. Estrogen receptor β agonist ameliorates social deficits in a mouse model of autism[J]. Journal of Third Military Medical University, 2019, 41(6): 507-513.
张瑞宇, 刘天曜, 肖锐, 等. 雌激素β受体激动剂改善自闭症模型小鼠的社交缺陷[J]. 第三军医大学学报, 2019,41(6):507-513. DOI: 10.16016/j.1000-5404.201811078.
Ruiyu ZHANG, Tianyao LIU, Rui XIAO, et al. Estrogen receptor β agonist ameliorates social deficits in a mouse model of autism[J]. Journal of Third Military Medical University, 2019, 41(6): 507-513. DOI: 10.16016/j.1000-5404.201811078.
目的
2
探讨雌激素β受体特异性激动剂ly3201对自闭症模型BTBR小鼠的行为改善作用。
方法
2
将健康同窝C57BL/6J(C57)、BTBR小鼠分为4组:C57生理盐水组、C57药物处理组、BTBR生理盐水组、BTBR药物处理组;小鼠生后2 d,药物处理组腹腔注射雌激素β受体激动剂ly3201(1.6 mg/kg),生理盐水组腹腔注射等量生理盐水;于生后14 d采用荧光定量PCR和免疫组化检测各组小鼠皮层与海马内雌激素β受体的表达;于小鼠2月龄进行自闭症相关行为学检测。
结果
2
生后14 d,BTBR生理盐水组皮层与海马内雌激素β受体的表达显著低于C57生理盐水组(
P
<
0.05),而ly3201处理则上调了C57与BTBR小鼠皮层及海马内雌激素β受体的表达(
P
<
0.01)。在三箱社交实验中,BTBR药物处理组小鼠在小鼠箱体停留时间大于在物体箱体中停留时间(
P
<
0.05),对小鼠的嗅探时间大于对物体的嗅探时间(
P
<
0.05);并且统计箱体时间(
P
<
0.01)和嗅探时间(
P
<
0.01)偏好系数也显示BTBR药物处理组表现出对小鼠的明显偏好;在交互实验中,BTBR药物处理组鼻对鼻嗅探时间(
P
<
0.05)、鼻对会阴嗅探时间(
P
<
0.05)明显多于BTBR生理盐水组,而其对箱体探索时间明显少于BTBR生理盐水组(
P
<
0.05)。
结论
2
雌激素β受体激动剂ly3201激活海马与皮层内源性雌激素β受体的表达,显著改善BTBR自闭症模型小鼠的社交缺陷。
Objective
2
To explore the therapeutic effect of estrogen receptor β agonist ly3201 on autism-like behaviors in BTBR mice.
Methods
2
Healthy neonatal (2 days old) C57BL/6J(C57) and BTBR littermate mice were both divided into 2 groups and subjected to intraperitoneal injections of estrogen receptor β agonist ly3201 at the dose of 1.6 mg/kg or normal saline of an equivalent volume. We measured the expression levels of estrogen receptor β in the cerebral cortex and hippocampus of the mice on day 14 after birth with immunohistochemistry and real-time PCR
and tested the mice for autism-like behaviors at 2 months of age.
Results
2
At 14 d after birth
the expression levels of estrogen receptor β in the cerebral cortex and hippocampus were significantly lower in BTBR mice than in C57 mice (
P
<
0.05)
and treatment with ly3201 obviously enhanced estrogen receptor β expression in both BTBR and C57 mice (
P
<
0.01). In the three-chambered social test
BTBR mice with ly3201 treatment spent significantly longer time in the chamber with other mice than in the chamber with a new object (
P
<
0.05); they also spent significantly longer time for exploratory sniffing of other mice than of the new object (
P
<
0.05). In the male-female reciprocal social interaction test
compared with the saline-treated mice
BTBR mice with ly3201 treatment exhibited longer time of nose-to-nose sniffing (
P
<
0.05) and anogenital sniffing (
P
<
0.05) with a significantly reduced time for cage exploration (
P
<
0.05).
Conclusion
2
Estrogen receptor β agonist ly3201 activates the expression of endogenous estrogen receptor in the hippocampus and cortex to alleviate social deficits in BTBR mice.
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ZOU Y L, LU Q M, ZHENG D, et al . Prenatal levonorgestrel exposure induces autism-like behavior in offspring through ERβ suppression in the amygdala[J ] . Mol Autism, 2017, 8:46. DOI:10.1186/s13229-017-0159-3.
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CRIDER A, NELSON T, DAVIS T, et al . Estrogen receptor β agonist attenuates endoplasmic reticulum stress-induced changes in social behavior and brain connectivity in mice[J ] . Mol Neurobiol, 2018, 55(9):7606-7618.DOI:10.1007/s12035-018-0929-8.
AMODEO D A, RIVERA E, COOK E H JR, et al . 5HT2A receptor blockade in dorsomedial striatum reduces repetitive behaviors in BTBR mice[J ] . Genes Brain Behav, 2017, 16(3):342-351. DOI:10.1111/gbb.12343.
FAN X T, WARNER M, GUSTAFSSON J A. Estrogen receptor beta expression in the embryonic brain regulates development of calretinin-immunoreactive GABAergic interneurons[J]. Proc Natl Acad Sci USA, 2006, 103(51):19338-19343. DOI:10.1073/pnas.0609663103.
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