The antinociceptive effect of 17β-estradiol in the nucleus paragigantocellularis lateralis of male rats may be mediated by the NMDA receptors
Author(s):
Abstract:
Introduction
The nucleus paragigantocellularis lateralis (LPGi) is involved in the descending pain modulation. The neurostreoid, 17β-estradiol found in the PGi nucleus and modulates nociception by binding to estrogen receptors and also by allosteric interaction with NMDA receptors. In this study, the role of NMDA receptors in the 17β-estradiol-induced pain modulation was investigated by assessing the inflammatory pain responses changes after blockade of the LPGi nucleus NMDA receptors. Methods
In order to study the antinociceptive effect of intra-LPGi microinjection of 17β-estradiol, a guide cannula was implanted into the right LPGi nucleus. 500 nl of drugs were administered 15 minutes prior to formalin (50 μl of 4%) injection. Then, formalin-induced paw jerking behaviour was recorded for 60 min. For assessing the role of the NMDA receptors in the pain modulation by 17β-estradiol, it was injected 15 min after the intra-LPGi administration of 0.5 nmol of AP5 (the NMDA receptor antagonist); and paw jerking frequency was recorded for 1 h.Results
The results of the present study showed that intra-LPGi injection of 0.8 μmol of 17β-estradiol attenuated the chronic phase (PConclusion
According to the results of this study, it can be concluded that the analgesic effect of intra-LPGi injection of 17β-estradiol on the formalin-induced inflammatory pain might be mediated via NMDA receptors.Keywords:
Language:
English
Published:
Physiology and Pharmacology, Volume:20 Issue: 2, Jun 2016
Pages:
122 to 129
magiran.com/p1563126
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!