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操纵儿茶酚-O-甲基转移酶(COMT)活性以影响奖赏缺乏综合征(RDS)的一种亚型——觅药行为的减弱,取决于基因多态性:一种假说。

Manipulation of catechol-O-methyl-transferase (COMT) activity to influence the attenuation of substance seeking behavior, a subtype of Reward Deficiency Syndrome (RDS), is dependent upon gene polymorphisms: a hypothesis.

作者信息

Blum Kenneth, Chen Thomas J H, Meshkin Brian, Waite Roger L, Downs B William, Blum Seth H, Mengucci Julie F, Arcuri Vanessa, Braverman Eric R, Palomo Tomas

机构信息

Department of Physiology and Pharmacology, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, NC, USA.

出版信息

Med Hypotheses. 2007;69(5):1054-60. doi: 10.1016/j.mehy.2006.12.062. Epub 2007 Apr 30.

Abstract

There are common genetic mechanisms responsible for both drug effects and subsequent seeking behavior. In 1996, we coined the term Reward Deficiency Syndrome (RDS). Past and current treatment of substance seeking behavior, a subtype of Reward Deficiency Syndrome (RDS), is considered by most to be inadequate. Recently, we evaluated a complex named Synaptamine [Haveos (SG8839R)]. The main difference with an older studied variant and the latest variant is the inclusion of a proprietary form of Rhodiola rosea, a known catechol-O-methyl-transferase inhibitor (COMT) to potentially enhance the activity of presynaptic released dopamine. In this regard, based on the current literature we hypothesize that manipulation of catechol-O-methyl-transferase (COMT) activity to influence the attenuation of substance seeking behavior, is dependent upon gene polymorphisms. In this regard we hypothesize that carrying the LL genotype with low COMT activity should as theorized, increase the reward induced by substance-induced dopamine release and may indeed increase the propensity to type 1 alcoholism and possibly other drugs that activate the dopaminergic system. Thus when alcohol is present in low COMT LL genotype, increasing COMT activity, not inhibiting it should assist in the reduction of social consumption or abuse. Alternatively, under physiological conditions (no psychoactive substances present (e.g. alcohol) carrying the DRD2 A1 allele with associated low D2 receptors should, as theorized, increase craving behavior because of a low or hypodopaminergic state causing the individual to seek out substances that increase the release of dopamine for subsequent activation of unbound D2 sites in the nucleus accumbens. Thus, in the absence of alcohol or other psychoactive drugs (dopamine releasers), especially during recovery or rehabilitation, decreasing, not increasing COMT activity, should result in enhanced synaptic dopamine as physiologically released, thereby proliferating D2 receptors while reducing stress, increasing well-being, reducing craving behavior and preventing relapse. Based on this hypothesis, we believe that adding the COMT inhibitor R. rosea (as Rhodimin) to our amino-acid and chromium combination in DUI offenders and other illegal drug-related crimes, increases the potential for more targeted neurochemical rebalancing and enhanced relapse prevention. Finally, we hypothesize that these data coupled together provide evidence that the combination of enkephalinase inhibition, neurotransmitter precursor loading, brain tryptophan enhancing and COMT inhibition as well as DNA analysis of the individual's genome, may be useful as an adjunct to therapy when used in outpatient recovery, specifically to assist in reducing craving behavior and preventing relapse.

摘要

药物作用和后续的觅药行为存在共同的遗传机制。1996年,我们创造了“奖赏缺乏综合征”(RDS)这一术语。大多数人认为,过去和当前对奖赏缺乏综合征(RDS)的一种亚型——物质觅求行为的治疗并不充分。最近,我们评估了一种名为Synaptamine [Haveos (SG8839R)]的复合物。与早期研究的变体和最新变体的主要区别在于,它包含了一种专利形式的红景天,红景天是一种已知的儿茶酚-O-甲基转移酶抑制剂(COMT),有可能增强突触前释放多巴胺的活性。在这方面,基于当前的文献,我们假设通过操纵儿茶酚-O-甲基转移酶(COMT)的活性来影响物质觅求行为的减弱,取决于基因多态性。在这方面,我们假设携带低COMT活性的LL基因型,理论上应该会增加物质诱导的多巴胺释放所带来的奖赏,并可能确实会增加1型酒精中毒以及可能其他激活多巴胺能系统的药物成瘾的倾向。因此,当低COMT LL基因型个体接触酒精时,增加COMT活性,而不是抑制它,应该有助于减少社交饮酒或滥用行为。另外,在生理条件下(不存在精神活性物质,如酒精),携带与低D2受体相关的DRD2 A1等位基因,理论上应该会增加渴望行为,因为低多巴胺能状态或多巴胺功能减退会导致个体寻找能增加多巴胺释放的物质,从而激活伏隔核中未结合的D2位点。因此,在没有酒精或其他精神活性药物(多巴胺释放剂)的情况下,尤其是在康复或戒毒期间,降低而不是增加COMT活性,应该会导致生理释放的突触多巴胺增加,从而使D2受体增多,同时减轻压力、提高幸福感、减少渴望行为并预防复发。基于这一假设,我们认为在酒驾者和其他与非法药物相关犯罪者中,将COMT抑制剂红景天(作为Rhodimin)添加到我们的氨基酸和铬组合中,增加了进行更有针对性的神经化学平衡和增强预防复发的可能性。最后,我们假设这些数据共同提供了证据,表明脑啡肽酶抑制、神经递质前体加载、增强脑内色氨酸、COMT抑制以及对个体基因组的DNA分析相结合,在门诊康复治疗中作为辅助手段可能是有用的,特别是有助于减少渴望行为和预防复发。

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