Journal of Jilin University(Medicine Edition) ›› 2023, Vol. 49 ›› Issue (3): 573-579.doi: 10.13481/j.1671-587X.20230304

• Research in basic medicine • Previous Articles     Next Articles

Effect of GRK5 over-expression on depression- like behavior in P301S Tau transgenic mice and its mechanism

Tianzhen ZHANG1,Hongtao SHEN1,Zheng GONG2,Bin ZHAO1,Yan WANG1()   

  1. 1.Institute of Neurology,Affiliated Hospital,Guangdong Medical University,Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases,Zhanjiang 524001,China
    2.Institute of Laboratory Animal Center,Guangdong Medical University,Zhanjiang 524001,China
  • Received:2022-08-29 Online:2023-05-28 Published:2023-06-20
  • Contact: Yan WANG E-mail:jwangyan@gdmu.edu.cn

Abstract:

Objective To discuss the effect of G protein-coupled receptor kinase5(GRK5) over-expression on the depression-like behaviors of the P301S Tau transgenic mice,and to clarify its possible mechanism. Methods Seventeen male P301S Tau mice were randomly divided into blank control group (given no treatment) and negative control group (given negative control virus in bilateral hippocampus regions),over-expression group (given GRK5 over-expression virus in bilateral hippocampus regions). The sugar-water preference test was used to detect the sugar-water preference rates of the mice in various groups, the percentages of immobility time of the mice in various groups were detected by tail suspension test(TST) and forced swimming test(FST); the expression levels of neurological function-related proteins in hippocampus tissue of the mice in various groups were dectated by Western blotting method; the expressions of microglia marker protein (IBA1), neuronal marker protein (NeuN), and astrocyte marker protein (GFAP) in hippocampus tissue of the mice in various groups were detected by immunofluorescence staining. Result The sugar-water preference assay results showed that compared with blank control and negative control groups, the percentage of sugar-water preference of the mice in over-expression group was decreased(P<0.05). The TST and FST results showed that the percentages of immobility time of the mice in over-expression group were increased compared with blank control and negative control groups (P<0.05). The Western blotting results showed that the expression levels of GRK5, Tau T205, and IBA1 proteins in hippocampus tissue of the mice in over-expression group were increased (P<0.05) and the expression level of synatotagmin(SYN) protein was decreased (P<0.05).The immunofluorescence staining results showed that compared with blank control group, the fluorescence expression of enhanced green fluoorescence protein(EGFP) in hippocampus tissue of the mice in negative control and over-expression groups could be seen and the EGFP was mainly co-localized with the NeuN; EGFP was hardly found in the microglia and astrocytes;compared with blank control and negative control groups, the number of microglia in hippocampus tissue of the mice in over-expression group was increased(P<0.05). Conclusion Over-expression of GRK5 in hippocampus tissue of the P301S Tau mice induces the depressive-like behaviors,and its mechanism may be related to the increasing of the expression of GRK5 in nucleus of the neurons.

Key words: Mice, P301S, G protein-coupled receptor kinase 5, Depression-like behavior, Tau protein

CLC Number: 

  • R749.4