Effects of Subchronic Buspirone Treatment on Depressive Profile in Socially Isolated Rats: Implication of Early Life Experience on 5-HT1A Receptor-Related Depression

被引:1
作者
Tzeng, Nian-Sheng [1 ,2 ]
Chung, Jing-Yi [3 ]
Lin, Chen-Cheng [3 ]
Cheng, Pao-Yun [3 ]
Liu, Yia-Ping [3 ,4 ]
机构
[1] Triserv Gen Hosp, Dept Psychiat, Taipei 114, Taiwan
[2] Natl Def Med Ctr, Student Counseling Ctr, Taipei 114, Taiwan
[3] Natl Def Med Ctr, Dept Physiol & Biophys, Lab Cognit Neurosci, Taipei 114, Taiwan
[4] Cheng Hsin Gen Hosp, Dept Psychiat, Taipei 112, Taiwan
关键词
5-HT1A receptors; 8-OH-DAPT; buspirone; depression; development; isolation rearing; partial agonism; POSTTRAUMATIC-STRESS-DISORDER; SEROTONIN; 5-HT1A; DORSAL; RESPONSES; ACTIVATION; ADOLESCENT; AGONISTS; NUCLEUS;
D O I
10.3390/ph17060717
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
The heterogeneity of etiology may serve as a crucial factor in the challenges of treatment, including the low response rate and the delay in establishing therapeutic effect. In the present study, we examined whether social experience since early life is one of the etiologies, with the involvement of the 5-HT1A receptors, and explored the potentially therapeutic action of the subchronic administration of buspirone, a partial 5-HT1A agonist. Rats were isolation reared (IR) since their weaning, and the depressive profile indexed by the forced-swim test (FST) was examined in adulthood. Nonspecific locomotor activity was used for the IR validation. Buspirone administration (1 mg/kg/day) was introduced for 14 days (week 9-11). The immobility score of the FST was examined before and after the buspirone administration. Tissue levels of serotonin (5-HT) and its metabolite 5-HIAA were measured in the hippocampus, the amygdala, and the prefrontal cortex. Efflux levels of 5-HT, dopamine (DA), and norepinephrine (NE) were detected in the hippocampus by brain dialysis. Finally, the full 5-HT1A agonist 8-OH-DPAT (0.5 mg/kg) was acutely administered in both behavioral testing and the dialysis experiment. Our results showed (i) increased immobility time in the FST for the IR rats as compared to the social controls, which could not be reversed by the buspirone administration; (ii) IR-induced FST immobility in rats receiving buspirone was corrected by the 8-OH-DPAT; and (iii) IR-induced reduction in hippocampal 5-HT levels can be reversed by the buspirone administration. Our data indicated the 5-HT1A receptor-linked early life social experience as one of the mechanisms of later life depressive mood.
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页数:14
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