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1.
《Developmental cell》2022,57(2):212-227.e8
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2.
《Molecular cell》2021,81(17):3604-3622.e10
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3.
The overlapping distribution of opioid and cholecystokinin (CCK) peptides and their receptors (μ and δ opioid receptors; CCK-A
and CCK-B receptors) in the central nervous system have led to a large number of studies aimed at clarifying the functional
relationships between these two neuropeptides. Most of the pharmacological studies devoted to the role of CCK and enkephalins
have been focused on the control of pain. Recently the existence of regulatory mechanisms between both systems have been proposed,
and the physiological antagonism between CCK and endogenous opioid systems has been definitely demonstrated by coadministration
of CCK-B selective antagonists with RB 101, a systemically active inhibitor, which fully protects enkephalins from their degradation.
Several studies have also been done to investigate the functional relationships between both systems in development of opioid
side-effects and in behavioral responses. This article will review the experimental pharmacology of association of enkephalin-degrading
enzyme inhibitors and CCK-B antagonists to demonstrate the interest of these molecules in the management of both pain and
opioid addiction.
Special issue dedicated to Dr. Eric J. Simon. 相似文献
4.
We have studied the role of second messenger and protein phosphorylation pathways in mediating changes in neuronal function associated with opiate addiction in the rat locus coeruleus. We have found that chronic opiates increase levels of the G-protein subunits Gi and Go, adenylate cyclase, cyclic AMP-dependent protein kinase, and a number of phosphoproteins (including tyrosine hydroxylase) in this brain region. Electrophysiological data have provided direct support for the view that this up-regulation of the cyclic AMP system contributes to opiate tolerance, dependence, and withdrawal exhibited by these neurons. As the adaptations in G-proteins and the cyclic AMP system appear to occur at least in part at the level of gene expression, current efforts are aimed at identifying the mechanisms, at the molecular level, by which opiates regulate the expression of these intracellular messenger proteins in the locus coeruleus. These studies will lead to an improved understanding of the biochemical basis of opiate addiction.Special issue dedicated to Dr. Paul Greengard 相似文献
5.
Substance use disorders (SUDs) are highly prevalent and exact a large toll on individuals’ health, well-being, and social functioning. Long-lasting changes in brain networks involved in reward, executive function, stress reactivity, mood, and self-awareness underlie the intense drive to consume substances and the inability to control this urge in a person who suffers from addiction (moderate or severe SUD). Biological (including genetics and developmental life stages) and social (including adverse childhood experiences) determinants of health are recognized factors that contribute to vulnerability for or resilience against developing a SUD. Consequently, prevention strategies that target social risk factors can improve outcomes and, when deployed in childhood and adolescence, can decrease the risk for these disorders. SUDs are treatable, and evidence of clinically significant benefit exists for medications (in opioid, nicotine and alcohol use disorders), behavioral therapies (in all SUDs), and neuromodulation (in nicotine use disorder). Treatment of SUDs should be considered within the context of a Chronic Care Model, with the intensity of intervention adjusted to the severity of the disorder and with the concomitant treatment of comorbid psychiatric and physical conditions. Involvement of health care providers in detection and management of SUDs, including referral of severe cases to specialized care, offers sustainable models of care that can be further expanded with the use of telehealth. Despite advances in our understanding and management of SUDs, individuals with these conditions continue to be stigmatized and, in some countries, incarcerated, highlighting the need to dismantle policies that perpetuate their criminalization and instead develop policies to ensure support and access to prevention and treatment. 相似文献
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王槐春 《生物化学与生物物理进展》1995,22(4):317-322
交互网络(Internet)的发展为联网的计算机用户之间进行信息交流提供了有效途径.就分子生物学家而言,他们不仅可以利用电子邮件系统发送和接收信息,而且更重要的是能够存取大量的分子生物学数据库和软件.利用Internet可以开展多种序列分析作业,包括序列数据库的类似性检索、基因编码区鉴定和蛋白质二级结构分析等.一个数据库,例如GenBank,可以通过多种方式来存取:a.电子邮件文件服务器,b.文件传送协议(FTP),c.Gopher,WAIS或WWW等服务器-客户机(Server-Client)系统.专为分子生物学家设计的BIOSCI电子公告牌为研究人员开展学术讨论、寻求别人帮助和与数据库人员交流提供了极大的方便. 相似文献
8.
Morphine and Cocaine Exert Common Chronic Actions on Tyrosine Hydroxylase in Dopaminergic Brain Reward Regions 总被引:9,自引:0,他引:9
We studied levels of tyrosine hydroxylase immunoreactivity and phosphorylation state in the ventral tegmental area (VTA) and nucleus accumbens (NAc) in an effort to understand better the mechanisms by which these brain reward regions are influenced by opiates and cocaine. In the VTA, chronic, but not acute, administration of either morphine or cocaine increased levels of tyrosine hydroxylase immunoreactivity by 30-40%, with no change observed in the relative phosphorylation state of the enzyme. In the NAc, chronic, but not acute, morphine and cocaine treatments decreased the phosphorylation state of tyrosine hydroxylase, without a change in its total amount. In contrast, morphine and cocaine did not regulate tyrosine hydroxylase in the substantia nigra or caudate/putamen, brain regions generally not implicated in drug reward. Morphine and cocaine regulation of tyrosine hydroxylase could represent part of a common biochemical basis of morphine and cocaine addiction and craving. 相似文献
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