摘要
目的 探索干酪乳杆菌对母婴分离诱导产后抑郁大鼠抑郁样行为的作用及海马NR1和NR2A受体表达的影响.方法 将24只 SD母鼠随机分为对照组(CON组,n=8)、产后抑郁组(PPD组,n=8)、产后抑郁+干酪乳杆菌组(PPD+干酪乳杆菌组,n=8).对照组在产后不进行任何干预,PPD组和PPD+干酪乳杆菌组大鼠采用母婴分离方法建立产后抑郁模型,同时PPD+干酪乳杆菌组大鼠在母婴分离14 d后,进行为期4周干酪乳杆菌灌胃[8×108 CFU/( kg·d)].采用强迫游泳实验(FST)评价各组大鼠的抑郁样行为.通过荧光实时定量PCR测定大鼠盲肠中乳酸杆菌、双歧杆菌、粪肠球菌及大肠杆菌的变化,及各组大鼠海马组织NR1、NR2A mRNA的表达.结果 与CON组[(157. 50±8. 13) s]相比,PPD组[(200. 00±10. 35) s]大鼠在强迫游泳实验中不动时间明显延长(t=-3. 23,P<0. 05).与PPD组相比,PPD+干酪乳杆菌组[(153. 25± 7. 41) s]不动时间明显缩短( t=3. 67,P<0. 05),抑郁样行为有所改善.与CON组相比,PPD组大鼠盲肠中乳酸杆菌[(1. 47±0. 08), t=-5. 87,P<0. 01]、粪肠球菌[(1. 23±0. 08),t=-2. 85,P<0. 05]和大肠杆菌[(1. 33±0. 07),t=-4. 96, P<0. 01]mRNA表达显著增加,双歧杆菌明显减少[(0. 65±0. 07),t=5. 18,P<0. 01];与PPD组相比, PPD+干酪乳杆菌组大鼠盲肠中乳酸杆菌[(1. 05±0. 05),t=3. 67,P<0. 01]、粪肠球菌[(0. 97±0. 05), t=2. 74,P<0. 05]和大肠杆菌[(1. 06±0. 05),t=3. 31,P<0. 01]显著减少,双歧杆菌明显增加[(0. 98± 0. 04),t=-4. 26,P<0. 01].与CON组相比,PPD组大鼠海马NR1[(0. 57±0. 04),t=9. 65,P<0. 01]和NR2A[(0. 60±0. 05),t=8. 64,P<0. 05]mRNA表达显著降低;与PPD组相比,PPD+干酪乳杆菌组大鼠海马NR1[(1. 01±0. 05),t=-5. 39,P<0. 01]和NR2A[(0. 98±0. 07),t=-3. 91,P<0. 05]表达显著升高.结论 干酪乳杆菌可以改善产后抑郁大鼠的抑郁样行为,改善肠道菌群,影响海马组织NR1和NR2A受体的表达.
Objective To investigate the effect of Lactobacillus casei on depressive behavior and the expression of NR1, NR2A receptor in postpartum depression rats induced by maternal separation. Methods Twenty-four Sprague-Dawley female rats were randomly divided into control group( CON group) (n=8),postpartum depression group(PPD group) (n=8),postpartum depression with lactobacillus casei group(PPD+ Lactobacillus casei group) (n=8). Rats of the control group were given no interventions. Rats in PPD group and PPD+Lactobacillus casei group were given maternal separation to establish depression model. And then the rats in PPD+Lactobacillus casei group were treated with Lactobacillus casei ( 8× 108CFU/(kg·d)) for 4 weeks after 14 days of maternal separation. The forced swimming test ( FST) was employed to detect the depressive behaviors. Lactobacillus,Bifidobacterium,Enterococcus faecalis and Esche-richia coli in cecum of rats and the expression of NR1 and NR2A mRNA in hippocampus of rats were detec-ted by real-time fluorescence quantitative PCR. Results Compared with CON group ((157. 50±8. 13) s), the immobility time of PPD group((200. 00±10. 35) s) was significantly longer (t=-3. 23,P<0. 05). Com-pared with PPD group,the immobility time of PPD+ Lactobacillus casei group ((153. 25±7. 41) s) was sig-nificantly shortened (t=3. 67,P<0. 05),and the depressive behavior was improved. Compared with CON group,the mRNA expression of Lactobacillus ((1. 47± 0. 08),t=-5. 87,P<0. 01),Enterococcus faecalis ((1. 23±0. 08),t=-2. 85,P<0. 05) and Escherichia coli( (1. 33±0. 07),t=-4. 96,P<0. 01) in caecum were significantly increased in PPD group, while that of Bifidobacterium decreased significantly (( 0. 65 ± 0. 07),t=5. 18,P<0. 01). Compared with PPD group,the mRNA expression of Lactobacillus ( ( 1. 05 ± 0. 05),t=3. 67,P<0. 01),Enterococcus faecalis ((0. 97±0. 05),t=2. 74,P<0. 05) and Escherichia coli ((1. 06±0. 05),t=3. 31,P<0. 01) were significantly decreased in PPD+ Lactobacillus casei group,while that of Bifidobacterium increased significantly ((0. 98± 0. 04),t=-4. 26,P<0. 01). Compared with CON group,the mRNA expression of NR1 receptor (( 0. 57 ± 0. 04), t=9. 65, P<0. 01) and NR2A receptor ((0. 60±0. 05),t=8. 64,P<0. 05) in hippocampus of rats in PPD group were significantly decreased. Com-pared with PPD group,the expression of NR1 receptor ((1. 01±0. 05),t=-5. 39,P<0. 01) and NR2A re-ceptor ((0. 98±0. 07),t=-3. 91,P<0. 05) in hippocampus were increased significantly in PPD+ Lactoba-cillus casei group. Conclusion Lactobacillus casei can improve the depressive behavior of postpartum depression in rats,and improve the intestinal flora,which affect the expression of NR1 and NR2A in hippocampus.
作者
张玉荣
王瑞忠
赵阳
王莉
毛俊俊
高飞
Zhang Yurong;Wang Ruizhong;Zhao Yang;Wang Li;Mao Junjun;Gao Fei(Department of Science,the First Affiliated Hospital of Xi'an Medical University,Xi'an 710077,China;Department of Pharmacy,Xi'an Daxing Hospital,Xi'an 710016,China;Department of Drug Clinical Trial Institution,the Second Affiliated Hospital of Xi'an Jiaotong University,Xi'an 710004,China;Department of Neurology,the First Affiliated Hospital of Xi'an Medical University,Xi'an 710077,China)
出处
《中华行为医学与脑科学杂志》
CAS
CSCD
北大核心
2019年第10期903-908,共6页
Chinese Journal of Behavioral Medicine and Brain Science
基金
陕西省教育厅科研计划项目(16JK1643)。
关键词
产后抑郁
海马
肠道菌群
干酪乳杆菌
NR1受体
NR2A受体
大鼠
Postpartum depression
Hippocampus
Intestinal flora
Lactobacillus casei
NR1 receptor
NR2A receptor
Rat
