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Prednisolone is a synthetic pregnane corticosteroid closely related to its cognate prednisone, having identical structure save for two fewer hydrogens near C 11. It is also known as δ 1-cortisol, δ 1-hydrocortisone, 1,2-dehydrocortisol, or 1,2-dehydrohydrocortisone, as well as 11β,17α,21-trihydroxypregna-1,4-diene-3,20-dione. [50] [51]
However, homeostatis does not explain how tolerance influences alcohol addiction in many cases. Epigenetic alterations, including phosphorylation, methylation, acetylation, miRNA, and chromatin remodeling, may help explain the cases not explained by homeostatic mechanisms. These epigenetic mechanisms have been studied in rodents.
Thus, there remains lingering doubt about the mechanisms of ethanol listed here, even for the GABA A receptor, the most-studied mechanism. [24] In the past, alcohol was believed to be a non-specific pharmacological agent affecting many neurotransmitter systems in the brain, [25] but progress has been made over the last few decades.
Alcohol dependence refers to an entity in which only alcohol is the involved addictive agent. Alcoholism refers to an entity in which alcohol or any cross-tolerant addictive agent is involved. In alcohol dependence, reduction of alcohol, as defined within DSM-IV, can be attained by learning to control the use of alcohol.
Substance dependence, also known as drug dependence, is a biopsychological situation whereby an individual's functionality is dependent on the necessitated re-consumption of a psychoactive substance because of an adaptive state that has developed within the individual from psychoactive substance consumption that results in the experience of withdrawal and that necessitates the re-consumption ...
The underlying mechanism involves a decreased responsiveness of GABA receptors in the brain. [3] The withdrawal process is typically followed using the Clinical Institute Withdrawal Assessment for Alcohol scale (CIWA-Ar). [3] The typical treatment of alcohol withdrawal is with benzodiazepines such as chlordiazepoxide or diazepam. [2]
Neuroscientists studying addiction define relapse as the reinstatement of drug-seeking behavior after a period of abstinence. The structural changes in the VTA are hypothesized to contribute to relapse. [47] As the molecular mechanisms of relapse are better understood, pharmacological treatments to prevent relapse are further refined. [48]
Compulsion is the need and desire to do something or carry out a task repetitively or persistently. Whereas addiction is defined by the following step after compulsion where an individual takes action on a compulsion to feel pleasure and satisfaction (the action is known as compulsive behavior). Notably, for addicts, compulsive behavior can ...