ZHANG Yuan,ZHU Jin-hua,CHEN Jing,et al.Molecular Mechanism of Wendantang Against Schizophrenia in Rats: An Exploration Based on miRNA-219, NR2B, DISC1 and CaMKⅡγ[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(01):33-40.
ZHANG Yuan,ZHU Jin-hua,CHEN Jing,et al.Molecular Mechanism of Wendantang Against Schizophrenia in Rats: An Exploration Based on miRNA-219, NR2B, DISC1 and CaMKⅡγ[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(01):33-40. DOI: 10.13422/j.cnki.syfjx.20220136.
Molecular Mechanism of Wendantang Against Schizophrenia in Rats: An Exploration Based on miRNA-219, NR2B, DISC1 and CaMKⅡγ
To study the effects of Wendantang on the expression of miRNA-219,
N
-methyl-
D
-aspartate receptor 2B (NR2B), disrupted in schizophrenia 1 (DISC1), and Ca
2+
/calmodulin-dependent protein kinase Ⅱ
γ
(CaMKⅡ
γ
) in the frontal lobe of rats with schizophrenia.
Method
2
Sixty rats were randomly divided into six groups, namely normal group, model group, high-, medium-, and low-dose Wendantang groups, and clozapine group, with 10 rats in each group. Rats in high-, medium-, and low-dose Wendantang groups were intragastric with 40, 20, and 10 g·kg
-1
Wendantang, and the ones in clozapine group were intragastric with 0.02 g·kg
-1
clozapine, those in normal and model group were intragastric with equal volume of normal saline, once a day. After 21 days of administration, rats in all groups except for the normal group were injected with 0.6 mg·kg
-1
dizocilpine maleate (MK-801) into the left abdominal cavity for inducing acute schizophrenia. The stereotypic behavior and ataxia in rats were scored according to SAMS and HOFFMAN criteria. The morphological changes in the prefrontal cortex were observed by hematoxylin-eosin (HE) staining. The protein expression levels of NR2B
DISC1 and CaMKⅡ
γ
in the frontal lobe was detected by Western blot. The mRNA expression levels of miRNA-219 was detected by real-time fluorescence quantitative polymerase chain reaction(Real-time PCR).
Result
2
Compared with normal group, the model group exhibited significantly increased stereotypic behavior and ataxia scores (
P
<
0.01), karyopyknosis and karyolysis in most neurons of the prefrontal cortex, and down-regulated NR2B, DISC1, and CaMKⅡ
γ
protein expression (
P
<
0.01) and miRNA-219, NR2B, DISC1, and CaMKⅡ
γ
mRNA expression (
P
<
0.01). Compared with model group, Wendantang high-, medium-, and low-doses group lowered the scores of stereotypic behavior and ataxia at 50, 60 mmin(
P
<
0.05,
P
<
0.01). In high- and medium-dose Wendantang groups, the neurons in the prefrontal cortex were densely arranged. The karyopyknosis and karyolysis were alleviated to varying degrees. The NR2B protein expression in the frontal lobe was up-regulated (
P
<
0.01). In the medium- and low-dose Wendantang groups, the DISC1 protein expression in the frontal lobe was up-regulated (
P
<
0.05,
P
<
0.01). Wendantang at each dose significantly increased the CaMKⅡ
γ
protein expression (
P
<
0.05) and miRNA-219, NR2B, DISC1, and CaMKⅡ
γ
mRNA expression in the frontal lobe (
P
<
0.05,
P
<
0.01).
Conclusion
2
Wendantang improves the scores of stereotypical behavior and ataxia, relieves the karyopyknosis and karyolysis of neurons in the prefrontal cortex, and increases the expression levels of miRNA-219, NR2B, DISC1, and CaMKⅡ
γ
of rats with schizophrenia, so as to alleviate the schizophrenic-like symptoms and schizophrenia.
关键词
Keywords
references
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Related Author
ZHANG Yuan
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Related Institution
Jiangxi University of Traditional Chinese Medicine
Research Center for Differentiation and Development of Traditional Chinese Medicine (TCM) Basic Theory/Jiangxi Province Key Laboratory of Biological Etiologies of TCM/First-Level Discipline Platform of Chinese and Western Integrative Medicine/Experimental Animal and Scientific Technology Center of Jiangxi University of Chinese Medicine/School of Pharmacy, Jiangxi University of Chinese Medicine
Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine