Yu-meng HAO, Ruo-yu WANG, Qi-ming ZHONG, et al. Effect of Isopimpinellin on Expression of Inhibitory Neurotransmitter and Receptor Genes in Primary Hippocampal Neurons. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(14):93-98(2019)
DOI:
Yu-meng HAO, Ruo-yu WANG, Qi-ming ZHONG, et al. Effect of Isopimpinellin on Expression of Inhibitory Neurotransmitter and Receptor Genes in Primary Hippocampal Neurons. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(14):93-98(2019) DOI: 10.13422/j.cnki.syfjx.20191302.
Effect of Isopimpinellin on Expression of Inhibitory Neurotransmitter and Receptor Genes in Primary Hippocampal Neurons
To observe the effect of isopimpinellin on primary hippocampal neuron cells
γ
-aminobutyric acid (GABA)
5-hydroxytryptamine (5-HT) and receptor genes expressions
in order to explore its hypnotic mechanism.
Method:
2
The primary hippocampal neurons of neonatal Sprague-Dawley rats were cultured
in vitro
. And subsequent experiments were conducted in the optimal state of cell growth
and the purity was identified by immunohistochemistry of neuron-specific enolase. Hippocampal neurons were randomly divided into five groups
namely blank control group
diazepam group (25 mg·L
-1
)
and low-dose (5 mg·L
-1
)
moderate-dose (10 mg·L
-1
) and high-dose (20 mg·L
-1
) isopimpinellin groups. Early apoptosis of hippocampus neuron cells were detected using flow cytometry technique after 24 h administration
and the changes in the levels of GABA and 5-HT were detected using enzyme-linked immunosorbent. The changes in mRNA expressions of receptor genes relating to gamma-aminobutyric acid type A receptor(GABAA) genes GABRA
1
GABRA
5
GABBR
1
gamma-aminobutyric acid type B receptor genes (GABAB) GABRB
2
5-hydroxytryptamine 1A receptor (5-HT1
A
)5-HT1
A(A)
5-HT1
A(B)
5-HT1
A(C)
were detected by real-time quantitative PCR(Real-time PCR).
Result:
2
On the 7
th
day
the hippocampal neurons grew in a good condition
and the purity was above 90%. Apoptosis rates of hippocampal neurons in the low-dose and moderate-dose groups were significantly lower than that in the blank control group (
P
<
0.01). The level of GABA secreted by hippocampal neurons in the high-dose isopimpinellin group were significantly higher than that in the blank control group (
P
<
0.01). The mRNA expression levels of GABRA
1
GABRA
5
5-HT1
A(A)
5-HT1
A(C)
in the moderate-dose and high-dose isopimpinellin groups were significantly higher than those in the blank control group (
P
<
0.05
P
<
0.01). The mRNA expression levels of GABBR
1
5-HT1
A(B)
in the low-dose
moderate-dose and high-dose isopimpinellin groups were significantly higher than those in the blank control group (
P
<
0.05
P
<
0.01).
Conclusion:
2
The hypnotic mechanism of isopimpinellin may be related to the inhibition of hippocampal neuron apoptosis
the increase of the content of inhibitory neurotransmitter GABA
and the up-regulation of GABA and 5-HT-related receptor genes.
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