| Autor: |
Chen Z; Anhui Key Laboratory of Bioactivity of Natural Products, School of Pharmacy, Anhui Medical University, 81 Meishan Road, Hefei, 230032, People's Republic of China., Xu YY; Department of pharmacy, The Fourth People's Hospital in Hefei, 316 Huangshan Road, Hefei, 230032, People's Republic of China., Ge JF; Anhui Key Laboratory of Bioactivity of Natural Products, School of Pharmacy, Anhui Medical University, 81 Meishan Road, Hefei, 230032, People's Republic of China. gejinfang@ahmu.edu.cn., Chen FH; Anhui Key Laboratory of Bioactivity of Natural Products, School of Pharmacy, Anhui Medical University, 81 Meishan Road, Hefei, 230032, People's Republic of China. |
| Abstrakt: |
The anorexigenic molecule nesfatin-1 has recently been taken as a potential mood regulator, but the potential mechanisms remain unknown. Results of our previous study have demonstrated that nesfatin-1 could induce anxiety- and depression-like behaviors in rats, accompanied by the hyperactivity of the hypothalamic-pituitary-adrenal axis and the imbalanced mRNA expression of synaptic vesicle proteins. To explore the potential neurobiological mechanism underlying the effect of nesfatin-1 on the synaptic plasticity, the human neuroblastoma SH-SY5Y cells were cultured and treated with different concentrations of nesfatin-1 in the present study. The mRNA and protein expressions of corticotropin-releasing hormone (CRH) were measured via real-time fluorescent quantitative PCR and western blot, respectively. The protein expressions of extracellular signal-regulated kinase 1/2 (ERK1/2), phosphorylated-ERK1/2 (p-ERK1/2), and synapsin I were detected via western blot. The results confirmed that nesfatin-1 (10 -9 ~10 -7 mol/L) could up-regulate the expression of CRH. Moreover, nesfatin-1 (10 -9 ~10 -7 mol/L) could also increase the protein expressions of p-ERK1/2 and synapsin I, and these effects could be blocked by CP376395, a selective antagonist of CRH type 1 receptor (CRHR1). Furthermore, the increased expression of synapsin I induced by nesfatin-1 could also be reversed by PD98059, a specific inhibitor of the p-ERK. These results indicated that CRHR1 might mediate the effect of nesfatin-1 on the expressions of synapsin I via ERK1/2 signaling pathway. |
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