Hui-hui XIE, Ying WANG, Shuo YANG, et al. Effect of Erxian Decoction on Cardiac Electrophysiology in Peri-menopausal Rats. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(18):43-48(2019)
DOI:
Hui-hui XIE, Ying WANG, Shuo YANG, et al. Effect of Erxian Decoction on Cardiac Electrophysiology in Peri-menopausal Rats. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(18):43-48(2019) DOI: 10.13422/j.cnki.syfjx.20191601.
Effect of Erxian Decoction on Cardiac Electrophysiology in Peri-menopausal Rats
To explore the effect and mechanism of Erxian decoction on peri-menopausal cardiac electrophysiology in rats.
Method:
2
Female sprague-dawley rats were randomly divided into six groups: sham operation group
model group
estradiol valerate group
and low
medium and high-dose Erxian decoction groups. Except the sham operation group
the rats in the other groups were completely removed from the ovarian replication peri-menopausal rat model. At the same time
estradiol valerate group (8×10
-4
g·kg
-1
·d
-1
)
low-dose Erxian decoction group (4 g·kg
-1
·d
-1
)
middle-dose Erxian decoction group (8 g·kg
-1
·d
-1
) and high-dose Erxian decoction group (12 g·kg
-1
·d
-1
)
sham operation group and model group were given the same amount of normal saline. The administration was given once a day for 80 consecutive days. The electrocardiogram of rats was recorded by biosignal detector connected to lead Ⅱ electrode. The content of estradiol (E
2
) in rat serum was detected by enzyme-linked immuno sorbent assay (ELISA). The pathological changes of rat uterus were observed by hematoxylin-eosin. The expression of the estrogen alpha receptor (ER
α
) protein was detected by Western blot method in myocardial tissue of rat.
Result:
2
Compared with the sham operation group
the amplitudes of P wave
R wave and T wave in the electrocardiogram of the model group were significantly decreased (
P
<
0.01)
and the PR interval
QRS time course and QT interval were shortened to different degrees. The E
2
level was significantly lower (
P
<
0.01). The uterus was obviously shriveled and shrank
the endometrial layer became thinner
and the number of glands reduced significantly. The expression of ER
α
receptor protein in myocardial tissue was significantly decreased (
P
<
0.01). Compared with the model group
the Erxian decoction group could improve the pathological changes of ECG in the above rats. The medium and high-dose Erxian decoction can significantly increase the E
2
level (
P
<
0.01)
reverse significantly the pathological changes of the uterus
and up-regulate the expression of ER
α
receptor protein (
P
<
0.01).
Conclusion:
2
Erxian decoction can improve cardiac electrophysiological changes in peri-menopausal rats
and its mechanism may be related to the increase of estrogen activity and estrogen receptor expression in rats.
Knowlton A A, Korzick D H. Estrogen and the female heart [J].Mol Cell Endocrinol, 2014, 389(1/2): 31-39.
Iorga A, Cunningham C M, Moazeni S, et al. The protective role of estrogen and estrogen receptors in cardiovascular disease and the controversial use of estrogen therapy [J].Biol Sex Differ, 2017, 8(1): 33.
Mendelsohn M E, Karas R H. Molecular and cellular basis of cardiovascular gender differences [J].Science, 2005, 308: 1583-1587.
Knowlton A A, Lee R. Estrogen and the cardiovascular system [J],Clin Pharmacol Ther, 2012, 135(1): 54-70.
Fliegner D, Schubert C, Penkalla A, et al. Female sex and estrogen receptor-β attenuate cardiac remodeling and apoptosis in presssure overload [J].Am J Physiol Regi, 2010, 298: R1597-R1606.
De Naeyer A, Pocock V, Milligan S, et al. Estrogenic activity of a polyphenolic extract of the leaves of epimedium brevicornum [J].Fitoterapia, 2005, 76(1): 35-40.
Lagari V S, Levis S. Phytoestrogens and bone health [J].Diabetes Obes Metab, 2010, 17(6): 546-553.
Favre J, GAO J, Henry J P, et al. Endothelial estrogen receptor {alpha} plays an essential role in the coronary and myocardial protective effects of estradiol in ischemia/reperfusion [J].Arterioscl Throm Vas, 2010, 30: 2562-2567.
Mahmoodzadeh S, Fritschka S, Dworatzek E, et al. Nuclear factor-kappaB regulates estrogen receptor-alpha transcription in the human heart [J].J Biol Chem, 2009, 284(37): 24705-24714.