期刊
JOURNAL OF PHYSIOLOGICAL SCIENCES
卷 65, 期 -, 页码 S29-S35出版社
SPRINGER JAPAN KK
DOI: 10.1007/BF03405853
关键词
Menstrual migraine; Estrous cycle; Trigeminal ganglion (TG) neurons; Whole-cell patch clamp recording; Voltage-sensitive ion channels
类别
资金
- Ratchadapiseksompoj Fund from the Faculty of Medicine, Chulalongkorn University
- Government Research Budget 2014-2019
- Research Unit and Center of Excellence for Neuroscience of Headache, Integrated Innovation Academic Center
- 2012 Chulalongkorn University Centenary Academic Development Project
- National Research University Project
- Office of Higher Education Commission [WCU-008-HR-57]
Migraines typically occur more frequently in women than men because of the effects of estrogen on both the frequency and severity of migraine attacks. Many women suffer from migraine attacks during menstruation, which are known as menstrual migraines. The pathophysiology of menstrual migraines can be explored by using the rat estrous cycle, which shows a cyclical fluctuation of estrogen level that resembles the menstrual cycle. The aim of this study was to investigate whether different stages of the estrous cycle are involved in migraine development by comparing the excitability of trigeminal ganglion (TG) neurons in four different stages of the estrous cycle by using action potential (AP) parameter assessments. The stages of the estrous cycle were identified by a vaginal smear and measuring the estrogen levels in collected blood. The proestrus and estrus stages had higher estrogen levels compared with the diestrus and metestrus stages. Whole-cell patch clamp recordings demonstrated that TG neurons in the proestrus and estrus stage had lower AP threshold, lower rheobase, higher AP height, shorter AP falling time and deeper after-hyperpolarization (AHP) depth. Hence, our results revealed that the high level of estrogen in the proestrus and estrus stage alters the AP properties of TG neurons. Estrogen may increase membrane excitability and the summation of cellular responses, which alters the AP properties. The alterations of the AP properties in the proestrus and estrus stage may relate to a modification of voltage-gated ion channels in TG neurons, which is a pathogenesis for menstrual migraine. No COI.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据