Peripheral mechanisms underlying electroacupuncture analgesia in a rat model of c

电针镇痛大鼠模型的外周机制

基本信息

批准号：
7994815
负责人：
Xuan-Zheng Peter Shi
金额：
$ 18.93万
依托单位：
UNIVERSITY OF TEXAS MED BR GALVESTON
依托单位国家：
美国
项目类别：
财政年份：
2009
资助国家：
美国
起止时间：
2009-12-01 至 2012-11-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/7994815
关键词：
Abdominal Pain Absence of pain sensation Absenteeism Acetic Acids Acupuncture procedure Acute Adult Afferent Neurons Analgesics Attenuated Birth Chronic Clinical Colon Colorectal Consultations Cystathionine Data Disease Electroacupuncture Enzymes Experimental Models Future Gastrointestinal Diseases Gene Expression Habits Healthcare Hydrogen Sulfide Hyperalgesia Hypersensitivity Impairment Inflammatory Injection of therapeutic agent Intestines Irritable Bowel Syndrome Knowledge Lead Marketing Mediating Medical Modality Modeling Molecular Neonatal Neurons Nociceptors Opiates Opioid Pain Pathway interactions Patients Peripheral Pharmaceutical Preparations Physicians Rattus Recurrence Role Safety Signal Pathway Signal Transduction Site Spinal Ganglia Staging Symptoms Syndrome Testing Treatment Effectiveness Visceral Visceral pain Workplace base colorectal distension desensitization economic cost nociceptive response public health relevance receptor success

项目摘要

DESCRIPTION (provided by applicant): Irritable Bowel Syndrome (IBS) remains a common and challenging syndrome for clinicians. It is defined by recurrent symptoms of abdominal pain or discomfort associated with alterations in bowel habits, in the absence of a detectable structural or inflammatory change in the colon. The pain, discomfort, and impairment from IBS often lead to healthcare medical consultation and workplace absenteeism, and associated economic costs. The causes of IBS and effectiveness of treatment have remained elusive. Although opiates have remained to be the drugs of choice for treating patients with severe pain and a few receptor modulators are marketed for treatment of IBS in recent years, there has been concern about the safety of these drugs. Electroacupuncture (EA), a complementary modality, has been used extensively for treatment of various painful conditions and gastrointestinal diseases. The mechanisms of acupuncture are not well understood, however, and one of the major problems impeding this understanding is a lack of proper experimental models. Recently, we have developed a model of EA-induced analgesia in rats with chronic visceral hyperalgesia (CVH). The objective of this application is to evaluate the effect of EA visceral anti- hyperalgesia and its mechanism in a rat model of CVH. We hypothesize that EA reverses the enhanced excitability of colon specific primary sensory neurons which is at least in part mediated by inhibition of endogenous hydrogen sulfide signaling, thus alleviates CVH. To test this hypothesis, we propose the following specific aims: Specific Aim 1 is to evaluate the acute and short-term effects of EA on nociceptive responses to colorectal distention in rats with CVH; Specific Aim 2 is to determine ionic and molecular basis for EA-mediated desensitization of primary sensory neurons in rats with CVH; and Specific Aim 3 is to determine the role of H2S signaling pathway in EA-mediated analgesia in rats with CVH. We believe that our studies on cellular activity, gene expression, and enzymatic activity in peripheral sensory neurons may open new era towards ionic and molecular understanding of EA treatment in CVH. This added knowledge will provide physicians with an increased clinical acceptance of EA in patients with functional bowel diseases. PUBLIC HEALTH RELEVANCE: Chronic visceral hyperalgesia occurs frequently in patients with functional bowel diseases and has not been controlled adequately. Electroacupuncture has been used for millennia to treat pain. This study will evaluate the effects and mechanisms of electroacupuncture on such pain in a rat model of chronic visceral hypersensitivity and the success of the proposed study will greatly advance the management of chronic visceral pain.

描述（由申请人提供）：肠易激综合症（IBS）仍然是临床医生的常见且具有挑战性的综合症。它是由腹痛或与肠习惯改变有关的反复发生的症状，而在结肠上没有可检测的结构性或炎症变化的情况下。 IBS的疼痛，不适和障碍通常会导致医疗保健医疗咨询和工作场所缺勤以及相关的经济成本。 IBS的原因和治疗的有效性仍然难以捉摸。尽管阿片类药物仍然是治疗严重疼痛患者的首选药物，并且近年来销售一些受体调节剂以治疗IBS，但人们一直担心这些药物的安全性。电针（EA）是一种互补的方式，已广泛用于治疗各种痛苦的疾病和胃肠道疾病。但是，针灸的机制尚不清楚，而阻碍这种理解的主要问题之一是缺乏适当的实验模型。最近，我们开发了一种具有慢性内脏痛觉过敏（CVH）大鼠的EA诱导的镇痛模型。该应用的目的是评估EA内脏抗痛觉过敏及其机制在CVH大鼠模型中的作用。我们假设EA可以逆转结肠特异性原发性神经元的兴奋性，至少部分是由于抑制内源性硫化物信号传导介导的，从而减轻了CVH。为了检验这一假设，我们提出了以下特定目的：具体目的1是评估EA对CVH大鼠大鼠结直肠差异的伤害感受反应的急性和短期影响；具体目的2是确定CVH大鼠原代感觉神经元脱敏的离子和分子基础；具体目标3是确定H2S信号通路在CVH大鼠中EA介导的镇痛中的作用。我们认为，我们对周围感觉神经元中细胞活性，基因表达和酶活性的研究可能会使对CVH中EA治疗的离子和分子理解开放新时代。这种增加的知识将使医生在功能性肠道疾病患者中对EA的临床接受增加。公共卫生相关性：慢性内脏痛觉过敏频繁发生在功能性肠道疾病的患者中，尚未得到充分控制。电针仪已用于数千年来治疗疼痛。这项研究将评估慢性内脏超敏反应的大鼠模型中电针的作用和机制对这种疼痛的影响，而拟议的研究的成功将大大提高慢性内脏疼痛的管理。