Abstract
Abrupt cessation of long-term alcohol consumption produces well-defined symptoms called alcohol withdrawal (AW). The exact pathophysiological mechanisms involved in the appearance of AW symptoms and particularly those related to the precipitation of delirium tremens (DT), still await clarification in spite of the fact that the prediction of complicated AW is essential to guarantee that appropriate therapies may be planned in advance. Changes in central nervous system (CNS) glutamate- and GABA-transmission and a role of voltageoperated calcium channels are equally important elements of neuroadaptation to the chronic presence of alcohol. In addition to the CNS regulation, however, changes in peripheral fluid and electrolyte homeostasis may accompany, and are expected to modify the clinical symptoms of AW. In an early phase of acute withdrawal, plasma levels of atrial natriuretic peptide (ANP), plasma renin activity and aldosterone are high. In patients with DT, elevated levels of ANP were observed days before the actual onset of DT. It is concluded that the altered plasma ANP secretion might be associated with, and therefore used as an indicator of the onset of DT. However, ANP is present in and produced by the brain and thus it can be regarded as a neuropeptide. The role of CNS ANP was studied in mice, rendered tolerant to and physically dependent on alcohol. Intracerebroventricular injections of ANP attenuated, whereas those of an antiserum against ANP intensified hyperexcitability during AW. ANP in the brain - the content of which undergoes sensitive changes in the hippocampus during AW - appears to interact primarily with glutamate transmission through the NMDA-receptors. This brain structure is of utmost importance for the generation of withdrawal-related hyperexcitability. It is concluded that peripheral secretion of ANP might be a diagnostics indicator, whereas ANP in the CNS might be a modulator of AW.
Keywords: alcohol withdrawal, natriuretic peptides, bloods levels, central nervous system, nmda, central and peripheral role
Current Medicinal Chemistry
Title: [General Articles] Natriuretic Peptides in Alcohol Withdrawal: Central and Peripheral Mechanisms
Volume: 10 Issue: 23
Author(s): G. L. Kovacs
Affiliation:
Keywords: alcohol withdrawal, natriuretic peptides, bloods levels, central nervous system, nmda, central and peripheral role
Abstract: Abrupt cessation of long-term alcohol consumption produces well-defined symptoms called alcohol withdrawal (AW). The exact pathophysiological mechanisms involved in the appearance of AW symptoms and particularly those related to the precipitation of delirium tremens (DT), still await clarification in spite of the fact that the prediction of complicated AW is essential to guarantee that appropriate therapies may be planned in advance. Changes in central nervous system (CNS) glutamate- and GABA-transmission and a role of voltageoperated calcium channels are equally important elements of neuroadaptation to the chronic presence of alcohol. In addition to the CNS regulation, however, changes in peripheral fluid and electrolyte homeostasis may accompany, and are expected to modify the clinical symptoms of AW. In an early phase of acute withdrawal, plasma levels of atrial natriuretic peptide (ANP), plasma renin activity and aldosterone are high. In patients with DT, elevated levels of ANP were observed days before the actual onset of DT. It is concluded that the altered plasma ANP secretion might be associated with, and therefore used as an indicator of the onset of DT. However, ANP is present in and produced by the brain and thus it can be regarded as a neuropeptide. The role of CNS ANP was studied in mice, rendered tolerant to and physically dependent on alcohol. Intracerebroventricular injections of ANP attenuated, whereas those of an antiserum against ANP intensified hyperexcitability during AW. ANP in the brain - the content of which undergoes sensitive changes in the hippocampus during AW - appears to interact primarily with glutamate transmission through the NMDA-receptors. This brain structure is of utmost importance for the generation of withdrawal-related hyperexcitability. It is concluded that peripheral secretion of ANP might be a diagnostics indicator, whereas ANP in the CNS might be a modulator of AW.
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Kovacs L. G., [General Articles] Natriuretic Peptides in Alcohol Withdrawal: Central and Peripheral Mechanisms, Current Medicinal Chemistry 2003; 10 (23) . https://dx.doi.org/10.2174/0929867033456459
DOI https://dx.doi.org/10.2174/0929867033456459 |
Print ISSN 0929-8673 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-533X |
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