Estrogen Underlying Increased Female Vulnerability to Addiction

雌激素导致女性更容易成瘾

基本信息

批准号：
8916856
负责人：
Robert L Meisel
金额：
$ 9.63万
依托单位：
UNIVERSITY OF MINNESOTA
依托单位国家：
美国
项目类别：
财政年份：
2013
资助国家：
美国
起止时间：
2013-01-01 至 2017-12-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8916856
关键词：
AMPA Receptors Acute Addictive Behavior Address Adult Affect Behavior Behavioral Brain Brain region Cellular Structures Cocaine Disease Drug Addiction Estradiol Estrogen Receptors Estrogens Estrous Cycle Excision Exhibits Female Foundations Frequencies GRM5 gene Glutamates Goals Health Hormones Human Illicit Drugs Injection of therapeutic agent Intake Laboratories Laboratory Rat Measures Mediating Membrane Menarche Menstrual cycle Modeling Molecular Motor Activity N-Methylaspartate Nervous System Physiology Neurons Nucleus Accumbens Ovary Pharmaceutical Preparations Physiologic pulse Physiological Play Rattus Receptor Activation Receptor Signaling Relapse Reproduction Risk Role Safe Sex Self Administration Self-Administered Series Sex Characteristics Signal Pathway Signal Transduction Structure Substance abuse problem Surface Synapses Testing Therapeutic Vertebral column Woman addiction craving demographics density drug of abuse in vivo Model insight male men metabotropic glutamate receptor 5 neurotransmission novel novel therapeutic intervention postsynaptic presynaptic proliferative phase Menstrual cycle psychostimulant receptor function research study response sex

项目摘要

DESCRIPTION (provided by applicant): In comparison to men, women are at an increased risk to abuse drugs. Across the spectrum of addiction, women show heightened intake of addictive substances, with greater craving, leading to an increased likelihood of addiction and relapse. These responses peak during the follicular phase of the menstrual cycle when estrogen levels are at their highest. These findings have been recapitulated in the female laboratory rat, where estradiol heightens multiple measures of drug responsiveness and abuse. Remarkably, the mechanisms by which estradiol mediates enhanced vulnerability to drug addiction are completely unknown. We propose a novel molecular mechanism mediating the actions of estradiol on nucleus accumbens neurons. Specifically we hypothesize that estradiol stimulation of estrogen receptor � (ER�) localized to the surface membrane of nucleus accumbens neurons activates metabotropic glutamate receptor 5 (mGluR5) signaling. Activation of ER�/mGluR5 signaling by estradiol, in turn, affects nucleus accumbens spine structure, nucleus accumbens glutamatergic neurotransmission and ultimately responsiveness to drugs of abuse. Collectively, these studies will provide a foundation for developing novel therapeutic approaches targeted to treating drug addiction in women.

描述（由适用提供）：与男性相比，妇女对滥用毒品的风险增加。在成瘾的整个范围内，妇女表现出更高的添加剂摄入量，渴望更大，从而增加了成瘾和退休的可能性。当雌激素水平最高时，这些响应在月经周期的卵泡阶段达到峰值。这些发现已在女性实验室大鼠中概括，在女性实验室大鼠中，雌二醇增强了药物反应性和滥用的多种测量。值得注意的是，雌二醇介导增强对药物添加的脆弱性的机制是完全未知的。我们提出了一种新型的分子机制，介导雌二醇对核神经元的作用。具体而言，我们假设雌激素受体的雌激素刺激位于核声神经元的表面膜上会激活代谢型谷氨酸受体5（MGLUR5）信号传导。雌二醇激活ER/MGLUR5信号传导反过来影响伏隔核的脊柱结构，伏托核谷氨酸能神经传递以及最终对滥用药物的反应。总的来说，这些研究将为开发针对女性药物成瘾的新型治疗方法提供基础。