1.南华大学附属第一医院检验科,湖南 衡阳421001
2.南华大学附属第一医院神经疾病研究所,湖南 衡阳421001
3.南华大学衡阳医学院神经科学研究所,湖南 衡阳421001
4.南华大学附属南华医院神经病学教研室,湖南 衡阳 421001
胡宇,在读研究生,研究方向:神经退行性疾病,E-mail: huyu-usc@qq.com
收稿:2021-05-06,
纸质出版:2021-11-20
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胡宇,唐慧玲,田清等.鱼藤酮对大鼠认知功能及其海马Warburg效应和小胶质细胞极化的影响[J].中山大学学报(医学科学版),2021,42(06):801-807.
HU Yu,TANG Hui-ling,TIAN Qing,et al.Effects of Rotenone on Cognitive Function as well as Hippocampal Warburg Effect and Microglia Polarization in Rats[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(06):801-807.
胡宇,唐慧玲,田清等.鱼藤酮对大鼠认知功能及其海马Warburg效应和小胶质细胞极化的影响[J].中山大学学报(医学科学版),2021,42(06):801-807. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2021.0601.
HU Yu,TANG Hui-ling,TIAN Qing,et al.Effects of Rotenone on Cognitive Function as well as Hippocampal Warburg Effect and Microglia Polarization in Rats[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(06):801-807. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2021.0601.
目的
2
探究鱼藤酮(ROT)对大鼠认知功能及其海马Warburg效应和小胶质细胞极化的影响。
方法
2
雄性SD大鼠随机分为对照组和ROT处理组。ROT处理组大鼠颈背部皮下注射ROT(2 mg/kg),对照组注射等量的溶剂。Y迷宫实验和新物体识别实验评估大鼠的认知功能,Western blot检测海马Warburg效应相关蛋白己糖激酶2(HK2)、丙酮酸激酶同工酶2(PKM2)、丙酮酸脱氢酶激酶1(PDK-1)、丙酮酸脱氢酶(PDH)、乳酸脱氢酶A(LDHA)和小胶质细胞极化标志性蛋白诱导型一氧化氮合成酶(iNOS)、精氨酸酶1(Arg-1)、几丁质酶3样分子3(Ym-1)的表达水平,乳酸试剂盒检测海马组织乳酸含量,Griess法测定海马组织一氧化氮(NO)含量,酶联免疫吸附测定法检测海马组织IL-1β、IL-4和TGF-β1含量。
结果
2
ROT处理组大鼠在Y迷宫实验中的正确交替率(
P
<
0.05)和在新物体识别实验中的识别指数(
P
<
0.001)较对照组降低,表明ROT损害大鼠的认知功能。ROT处理组大鼠海马组织HK2(
P
<
0.05)、PKM2(
P
<
0.01)、PDK-1(
P
<
0.05)和LDHA(
P
<
0.05)的表达下降,PDH的表达上升(
P
<
0.05),乳酸的含量减少(
P
<
0.05),表明ROT抑制大鼠海马Warburg效应。ROT处理组大鼠海马组织iNOS的表达增加(
P
<
0.05)、NO的含量增加(
P
<
0.05)、IL-1β的分泌增加(
P
<
0.01)、Arg-1(
P
<
0.01)和Ym-1(
P
<
0.01)的表达降低、IL-4(
P
<
0.05)和TGF-β1(
P
<
0.05)的分泌减少,表明ROT促进大鼠海马小胶质细胞M1极化。
结论
2
ROT可破坏大鼠的认知功能、抑制海马Warburg效应、促进海马小胶质细胞M1极化。
Objective
2
To investigate the effects of rotenone (ROT) on cognitive function of rats, as well as on Warburg effect and microglia polarization in the hippocampus of rats.
Methods
2
Male Sprague Dawley (SD) rats were randomly divided into ROT-treated group and control group which were subcutaneously injected with ROT (2 mg/kg) and same volume of saline respectively. The cognitive function of rats was evaluated by Y-maze test and novel object recognition (NOR) test. Western blot (WB) was conducted to detect the expression levels of Warburg effect related proteins including hexokinase 2 (HK2), pyruvate kinase isozyme M2 (PKM2), pyruvate dehydrogenase kinase 1 (PDK-1), pyruvate dehydrogenase (PDH), and lactate dehydrogenase A (LDHA) in the hippocampus, as well as the expression levels of the microglia polarization marker proteins including inducible nitric oxide synthase (iNOS), arginase-1 (Arg-1), and chitinase 3-like protein 3 (Ym-1) in the hippocampus. The lactate production and concentration of nitric oxide (NO) in the hippocampus were determined by lactate assay kit and Griess method, respectively. Enzyme-linked immunosorbent assay was used to measure the levels of interleukin-1β (IL-1β), interleukin-4 (IL-4), and transforming growth factor β1 (TGF-β1) in the hippocampus.
Results
2
The ROT-treated rats showed impaired cognitive function, presented as a significantly lower alternation rate (
P
<
0.05) in Y-maze test and recognition index (
P
<
0.001) in NOR test compared with control rats. In the hippocampus of ROT-treated rats, the expressions of HK2 (
P
<
0.05), PKM2 (
P
<
0.01), PDK-1 (
P
<
0.05) and LDHA (
P
<
0.05) were downregulated, The PDH expression was upregulated (
P
<
0.05), and the lactate production (
P
<
0.05) was reduced, indicating that ROT inhibited Warburg effect in the hippocampus of rats. The hippocampus of ROT-treated rats also exhibited increased iNOS expression (
P
<
0.05), NO concentration (
P
<
0.05), and IL-1β level (
P
<
0.01), decreased expression of Arg-1(
P
<
0.01) and Ym-1 (
P
<
0.01), and reduced levels of IL-4 (
P
<
0.05) and TGF-β1 (
P
<
0.05), indicating that ROT promoted M1 polarization of hippocampal microglia.
Conclusion
2
ROT impairs the cognitive function of rats, inhibits the hippocampal Warburg effect and promotes M1 polarization of hippocampal microglia.
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