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Xu Z, Zhang J, Wu J, Yang S, Li Y, Wu Y, Li S, Zhang X, Zuo W, Lian X, Lin J, Jiang Y, Xie L, Liu Y, Wang P. Lactobacillus plantarum ST-III culture supernatant ameliorates alcohol-induced cognitive dysfunction by reducing endoplasmic reticulum stress and oxidative stress. Front Neurosci 2022; 16:976358. [PMID: 36188464 PMCID: PMC9515438 DOI: 10.3389/fnins.2022.976358] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/15/2022] [Indexed: 11/28/2022] Open
Abstract
Background Long-term alcohol exposure is associated with oxidative stress, endoplasmic reticulum (ER) stress, and neuroinflammation, which may impair cognitive function. Probiotics supplements can significantly improve cognitive function in neurodegenerative diseases such as Alzheimer’s disease. Nevertheless, the effect of Lactobacillus plantarum ST-III culture supernatant (LP-cs) on alcohol-induced cognitive dysfunction remains unclear. Methods A mouse model of cognitive dysfunction was established by intraperitoneal injection of alcohol (2 g/kg body weight) for 28 days. Mice were pre-treated with LP-cs, and cognitive function was evaluated using the Morris water maze test. Hippocampal tissues were collected for biochemical and molecular analysis. Results LP-cs significantly ameliorated alcohol-induced decline in learning and memory function and hippocampal morphology changes, neuronal apoptosis, and synaptic dysfunction. A mechanistic study showed that alcohol activated protein kinase R-like endoplasmic reticulum kinase (PERK) signaling and suppressed brain derived neurotrophic factor (BDNF) levels via ER stress in the hippocampus, which LP-cs reversed. Alcohol activated oxidative stress and inflammation responses in the hippocampus, which LP-cs reversed. Conclusion LP-cs significantly ameliorated alcohol-induced cognitive dysfunction and cellular stress. LP-cs might serve as an effective treatment for alcohol-induced cognitive dysfunction.
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Affiliation(s)
- Zeping Xu
- Department of Pharmacy, Ningbo Medical Center Li Huili Hospital, The Affiliated Hospital of Ningbo University, Ningbo, China
| | - Jinjing Zhang
- Department of Pharmacy, Affiliated Cixi Hospital, Wenzhou Medical University, Wenzhou, China
| | - Junnan Wu
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
- The Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
| | - Shizhuo Yang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yuying Li
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yuyu Wu
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
| | - Siyuan Li
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
| | - Xie Zhang
- Department of Pharmacy, Ningbo Medical Center Li Huili Hospital, The Affiliated Hospital of Ningbo University, Ningbo, China
| | - Wei Zuo
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Xiang Lian
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Jianjun Lin
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Yongsheng Jiang
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
| | - Longteng Xie
- The Affiliated Xiangshan Hospital of Wenzhou Medical University, Ningbo, China
- Longteng Xie,
| | - Yanlong Liu
- School of Mental Health, Wenzhou Medical University, Wenzhou, China
- The Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
- *Correspondence: Yanlong Liu,
| | - Ping Wang
- The Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
- Ping Wang,
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Peroxiredoxin II Maintains the Mitochondrial Membrane Potential against Alcohol-Induced Apoptosis in HT22 Cells. Antioxidants (Basel) 2019; 9:antiox9010001. [PMID: 31861323 PMCID: PMC7023630 DOI: 10.3390/antiox9010001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/17/2019] [Accepted: 12/17/2019] [Indexed: 12/15/2022] Open
Abstract
Excessive alcohol intake can significantly reduce cognitive function and cause irreversible learning and memory disorders. The brain is particularly vulnerable to alcohol-induced ROS damage; the hippocampus is one of the most sensitive areas of the brain for alcohol neurotoxicity. In the present study, we observed significant increasing of intracellular ROS accumulations in Peroxiredoxin II (Prx II) knockdown HT22 cells, which were induced by alcohol treatments. We also found that the level of ROS in mitochondrial was also increased, resulting in a decrease in the mitochondrial membrane potential. The phosphorylation of GSK3β (Ser9) and anti-apoptotic protein Bcl2 expression levels were significantly downregulated in Prx II knockdown HT22 cells, which suggests that Prx II knockdown HT22 cells were more susceptible to alcohol-induced apoptosis. Scavenging the alcohol-induced ROS with NAC significantly decreased the intracellular ROS levels, as well as the phosphorylation level of GSK3β in Prx II knockdown HT22 cells. Moreover, NAC treatment also dramatically restored the mitochondrial membrane potential and the cellular apoptosis in Prx II knockdown HT22 cells. Our findings suggest that Prx II plays a crucial role in alcohol-induced neuronal cell apoptosis by regulating the cellular ROS levels, especially through regulating the ROS-dependent mitochondrial membrane potential. Consequently, Prx II may be a therapeutic target molecule for alcohol-induced neuronal cell death, which is closely related to ROS-dependent mitochondria dysfunction.
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Shim JH, Kim YT, Kim S, Baek HM. Volumetric Reductions of Subcortical Structures and Their Localizations in Alcohol-Dependent Patients. Front Neurol 2019; 10:247. [PMID: 30941093 PMCID: PMC6433880 DOI: 10.3389/fneur.2019.00247] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 02/25/2019] [Indexed: 11/13/2022] Open
Abstract
Changes in brain morphometry have been extensively reported in various studies examining the effects of chronic alcohol use in alcohol-dependent patients. Such studies were able to confirm the association between chronic alcohol use and volumetric reductions in subcortical structures using FSL (FMRIB software library). However, each study that utilized FSL had different sets of subcortical structures that showed significant volumetric reduction. First, we aimed to investigate the reproducibility of using FSL to assess volumetric differences of subcortical structures between alcohol-dependent patients and control subjects. Second, we aimed to use Vertex analysis, a less utilized program, to visually inspect 3D meshes of subcortical structures and observe significant shape abnormalities that occurred in each subcortical structure. Vertex analysis results from the hippocampus and thalamus were overlaid on top of their respective subregional atlases to further pinpoint the subregional locations where shape abnormalities occurred. We analyzed the volumes of 14 subcortical structures (bilateral thalamus, caudate, putamen, globus pallidus, hippocampus, amygdala, nucleus accumbens) in 21 alcohol-dependent subjects and 21 healthy controls using images acquired with 3T MRI. The images were run through various programs found in FSL, such as SIENAX, FIRST, and Vertex analysis. We found that in alcohol-dependent patients, the bilateral thalamus (left: p < 0.01, right: p = 0.01), bilateral putamen (left: p = 0.02, right: p < 0.01), right globus pallidus (p < 0.01), bilateral hippocampus (left: p = 0.05, right: p = 0.03) and bilateral nucleus accumbens (left: p = 0.05, right: p = 0.03) were significantly reduced compared to the corresponding subcortical structures of healthy controls. With vertex analysis, we observed surface reductions of the following hippocampal subfields: Presubiculum, hippocampal tail, hippocampal molecular layer, hippocampal fissure, fimbria, and CA3. We reproduced the assessment made in previous studies that reductions in subcortical volume were negatively associated with alcohol dependence by using the FMRIB Software Library. In addition, we identified the subfields of the thalamus and hippocampus that showed volumetric reduction.
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Affiliation(s)
- Jae-Hyuk Shim
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, South Korea
| | - Yong-Tae Kim
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, South Korea
| | - Siekyeong Kim
- Department of Psychiatry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Hyeon-Man Baek
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, South Korea
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Toselli F, de Waziers I, Dutheil M, Vincent M, Wilce PA, Dodd PR, Beaune P, Loriot MA, Gillam EMJ. Gene expression profiling of cytochromes P450, ABC transporters and their principal transcription factors in the amygdala and prefrontal cortex of alcoholics, smokers and drug-free controls by qRT-PCR. Xenobiotica 2015; 45:1129-37. [DOI: 10.3109/00498254.2015.1040102] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Shirpoor A, Nemati S, Ansari MHK, Ilkhanizadeh B. The protective effect of vitamin E against prenatal and early postnatal ethanol treatment-induced heart abnormality in rats: a 3-month follow-up study. Int Immunopharmacol 2015; 26:72-9. [PMID: 25805307 DOI: 10.1016/j.intimp.2015.03.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 02/23/2015] [Accepted: 03/09/2015] [Indexed: 01/14/2023]
Abstract
Ethanol consumption during pregnancy is associated with fetal heart malformation. However, the underlying mechanism of prenatal ethanol exposure causing heart malfunction is not well known. The current study examined the effect of prenatal and early postnatal ethanol consumption on heart abnormality resulting from oxidative and inflammatory stress. It was also intended to find out whether vitamin E inhibits the abnormality induced by ethanol in rats' heart tissue. Pregnant Wistar rats received ethanol with/without vitamin E from the seventh day of gestation (GD7) throughout lactation. The proliferation in heart muscle cells and coronary smooth muscle cells, protein carbonyl, IL-6, TNF-α, homocysteine levels, also lipid profile in heart and plasma of male pups were measured at the end of lactation (PN 21) and 90 days after birth (PN 90). The results indicated proliferation of heart muscle and coronary smooth muscle cells along with heart structural alteration, protein oxidation, lipid peroxidation, inflammatory reaction, and hyperhomocysteinemia in offspring after 21 and 90 days of birth compared with the controls. Vitamin E treatment significantly decreased cell proliferation and heart structural alteration, compared with the group treated by ethanol alone. Furthermore, it reduced the elevation of protein carbonyl, lipid peroxidation, and increased inflammatory proteins to levels as those of the controls. These findings strongly support the idea that ethanol intake by dams during pregnancy and early postnatal days induces heart abnormality mediated by oxidative stress and inflammatory reactions, and that these effects can be alleviated by using vitamin E as an antioxidant and anti-inflammatory molecule.
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Affiliation(s)
- Alireza Shirpoor
- Department of Physiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran.
| | - Samira Nemati
- Department of Physiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | | | - Behrouz Ilkhanizadeh
- Department of Pathology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
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Prendergast MA, Mulholland PJ. Glucocorticoid and polyamine interactions in the plasticity of glutamatergic synapses that contribute to ethanol-associated dependence and neuronal injury. Addict Biol 2012; 17:209-23. [PMID: 21967628 PMCID: PMC3254017 DOI: 10.1111/j.1369-1600.2011.00375.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Stress contributes to the development of ethanol dependence and is also a consequence of dependence. However, the complexity of physiological interactions between activation of the hypothalamic-pituitary-adrenal (HPA) axis and ethanol itself is not well delineated. Emerging evidence derived from examination of corticotropin-releasing factor systems and glucocorticoid receptor systems in ethanol dependence suggests a role for pharmacological manipulation of the HPA axis in attenuating ethanol intake, though it is not clear how activation of the HPA axis may promote ethanol dependence or contribute to the neuroadaptative changes that accompany the development of dependence and the severity of ethanol withdrawal. This review examines the role that glucocorticoids, in particular, have in promoting ethanol-associated plasticity of glutamatergic synapses by influencing expression of endogenous linear polyamines and polyamine-sensitive polypeptide subunits of N-methyl-D-aspartate (NMDA)-type glutamate receptors. We provide evidence that interactions among glucocorticoid systems, polyamines and NMDA receptors are highly relevant to both the development of ethanol dependence and to behavioral and neuropathological sequelae associated with ethanol withdrawal. Examination of these issues is likely to be of critical importance not only in further elucidating the neurobiology of HPA axis dysregulation in ethanol dependence, but also with regard to identification of novel therapeutic targets that may be exploited in the treatment of ethanol dependence.
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Affiliation(s)
- Mark A. Prendergast
- University of Kentucky, Department of Psychology, 741 South Limestone Street, Lexington, KY 40536, U.S.A
- Spinal Cord and Brain Injury Research Center, B449 Biomedical and Biological Sciences Research Building, 741 South Limestone Street, Lexington, KY 40536, U.S.A
| | - Patrick J. Mulholland
- Departments of Neurosciences and Psychiatry & Behavioral Sciences, Medical University of South Carolina, 67 President Street, IOP 462 North Charleston, South Carolina 29425, U.S.A
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Sameti M, Smith S, Patenaude B, Fein G. Subcortical volumes in long-term abstinent alcoholics: associations with psychiatric comorbidity. Alcohol Clin Exp Res 2011; 35:1067-80. [PMID: 21332530 DOI: 10.1111/j.1530-0277.2011.01440.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Research in chronic alcoholics on memory, decision-making, learning, stress, and reward circuitry has increasingly highlighted the importance of subcortical brain structures. In addition, epidemiological studies have established the pervasiveness of co-occurring psychiatric diagnoses in alcoholism. Subcortical structures have been implicated in externalizing pathology, including alcohol dependence, and in dysregulated stress and reward circuitry in anxiety and mood disorders and alcohol dependence. Most studies have focused on active or recently detoxified alcoholics, while subcortical structures in long-term abstinent alcoholics (LTAA) have remained relatively uninvestigated. METHODS Structural MRI was used to compare volumes of 8 subcortical structures (lateral ventricles, thalamus, caudate, putamen, pallidum, hippocampus, amygdala, and nucleus accumbens) in 24 female and 28 male LTAA (mean abstinence=6.3 years, mean age= 46.6 years) and 23 female and 25 male nonalcoholic controls (NAC) (mean age=45.6 years) to explore relations between subcortical brain volumes and alcohol use measures in LTAA and relations between subcortical volumes and psychiatric diagnoses and symptom counts in LTAA and NAC. RESULTS We found minimal differences between LTAA and NAC in subcortical volumes. However, in LTAA, but not NAC, volumes of targeted subcortical structures were smaller in individuals with versus without comorbid lifetime or current psychiatric diagnoses, independent of lifetime alcohol consumption. CONCLUSIONS Our finding of minimal differences in subcortical volumes between LTAA and NAC is consistent with LTAA never having had volume deficits in these regions. However, given that imaging studies have frequently reported smaller subcortical volumes in active and recently detoxified alcoholics compared to controls, our results are also consistent with the recovery of subcortical volumes with sustained abstinence. The finding of persistent smaller subcortical volumes in LTAA, but not NAC, with comorbid psychiatric diagnoses, suggests that the smaller volumes are a result of the combined effects of chronic alcohol dependence and psychiatric morbidity and suggests that a comorbid psychiatric disorder (even if not current) interferes with the recovery of subcortical volumes.
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Affiliation(s)
- Mohammad Sameti
- Neurobehavioral Research, Inc., 1585 Kapiolani Blvd., Honolulu, HI 96814, USA
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Shirpoor A, Minassian S, Salami S, Khadem-Ansari MH, Ghaderi-Pakdel F, Yeghiazaryan M. Vitamin E protects developing rat hippocampus and cerebellum against ethanol-induced oxidative stress and apoptosis. Food Chem 2009. [DOI: 10.1016/j.foodchem.2008.07.034] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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9
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Hamelink C, Hampson A, Wink DA, Eiden LE, Eskay RL. Comparison of cannabidiol, antioxidants, and diuretics in reversing binge ethanol-induced neurotoxicity. J Pharmacol Exp Ther 2005; 314:780-8. [PMID: 15878999 PMCID: PMC4183207 DOI: 10.1124/jpet.105.085779] [Citation(s) in RCA: 128] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Binge alcohol consumption in the rat induces substantial neurodegeneration in the hippocampus and entorhinal cortex. Oxidative stress and cytotoxic edema have both been shown to be involved in such neurotoxicity, whereas N-methyl-d-aspartate (NMDA) receptor activity has been implicated in alcohol withdrawal and excitoxic injury. Because the nonpsychoactive cannabinoid cannabidiol (CBD) was previously shown in vitro to prevent glutamate toxicity through its ability to reduce oxidative stress, we evaluated CBD as a neuroprotectant in a rat binge ethanol model. When administered concurrently with binge ethanol exposure, CBD protected against hippocampal and entorhinal cortical neurodegeneration in a dose-dependent manner. Similarly, the common antioxidants butylated hydroxytoluene and alpha-tocopherol also afforded significant protection. In contrast, the NMDA receptor antagonists dizocilpine (MK-801) and memantine did not prevent cell death. Of the diuretics tested, furosemide was protective, whereas the other two anion exchanger inhibitors, L-644,711 [(R)-(+)-(5,6-dichloro2,3,9,9a-tetrahydro 3-oxo-9a-propyl-1H-fluoren-7-yl)oxy acetic acid] and bumetanide, were ineffective. In vitro comparison of these diuretics indicated that furosemide is also a potent antioxidant, whereas the nonprotective diuretics are not. The lack of efficacy of L-644,711 and bumetanide suggests that the antioxidant rather than the diuretic properties of furosemide contribute most critically to its efficacy in reversing ethanol-induced neurotoxicity in vitro, in our model. This study provides the first demonstration of CBD as an in vivo neuroprotectant and shows the efficacy of lipophilic antioxidants in preventing binge ethanol-induced brain injury.
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Affiliation(s)
- Carol Hamelink
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulatiuon, National Institute of Mental Health/NIH, Bldg. 49, Room 5A-35, 9000 Rockville Pike, Bethesda, MD 20892, USA
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Haddad JJ. Alcoholism and neuro-immune-endocrine interactions: physiochemical aspects. Biochem Biophys Res Commun 2004; 323:361-71. [PMID: 15369760 DOI: 10.1016/j.bbrc.2004.08.119] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2004] [Indexed: 01/14/2023]
Abstract
The role of alcohol consumption and alcoholism as an addiction in regulating the chemistry of the brain and its physiology has gained a backlog of interest over the past few decades. Besides the notion that alcohol acts as a brain depressant, the molecular mechanisms and neuronal interactions are not well understood. Emerging evidence implicates alcohol as a neurochemical messenger that influences a cross talk amongst the nervous, immune, and endocrine systems. Specifically, alcohol acts as a crucial regulator of the hypothalamic-pituitary-adrenal (HPA) axis, thereby modulating the release of hormones, particularly adrenocorticotropic hormone (ACTH) and corticosterone (CORT). It is the aim of this review, therefore, to investigate current concepts on how alcohol, particularly ethanol, and alcoholism affect neuro-immune-endocrine neurochemical interactions via the regulation of the HPA axis, taking into consideration bio-behavioral and physiochemical aspects.
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Affiliation(s)
- John J Haddad
- Department of Biology, Faculty of Arts and Sciences, American University of Beirut, Beirut, Lebanon.
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Adinoff B, Ruether K, Krebaum S, Iranmanesh A, Williams MJ. Increased salivary cortisol concentrations during chronic alcohol intoxication in a naturalistic clinical sample of men. Alcohol Clin Exp Res 2004; 27:1420-7. [PMID: 14506402 DOI: 10.1097/01.alc.0000087581.13912.64] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Cortisol, the primary glucocorticoid in humans, is intimately involved in the regulation of such varied and critical biological processes as emotion, cognition, reward, immune functioning, and energy utilization. A persistent increase in cortisol concentration as a result of chronic intoxication could therefore result in alcohol-related disorders such as sleep disruption, cognitive deficits, diabetes, and mood disturbances. Although moderate levels of acute alcohol ingestion are reported to produce an increase in cortisol levels, it is uncertain whether cortisol remains persistently increased during long-term chronic intoxication. METHODS Salivary cortisol and breath alcohol concentrations (BAC) were obtained on 73 subjects with primary alcohol dependence on initial presentation for treatment and 22 alcohol-dependent subjects participating in a residential treatment program. RESULTS Both intoxicated alcohol-dependent subjects (n = 38) and nonintoxicated subjects in acute alcohol withdrawal (n = 30) demonstrated significantly increased salivary cortisol concentrations compared with abstinent subjects (n = 27; p < 0.001). Nonintoxicated subjects in acute withdrawal demonstrated significantly increased salivary cortisol concentrations compared with highly intoxicated subjects (BAC >100 mg/dl) but were similar to subjects with lower levels of intoxication (BAC, 10-100 mg/dl). CONCLUSIONS Chronic alcohol-dependent subjects experience continuously increased concentrations of cortisol during both intoxication and withdrawal. Increased levels of cortisol during chronic intoxication seem to progressively increase with the onset of withdrawal. This suggests a daily cycle of hypercortisolemia during the active drinking phase, with further increases on the cessation of drinking and the emergence of withdrawal symptoms. Persistently increased levels of cortisol may extract a costly allostatic load, resulting in significant central nervous system and peripheral organ morbidity.
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Affiliation(s)
- Bryon Adinoff
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, USA.
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12
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Roy A, Mittal N, Zhang H, Pandey SC. Modulation of cellular expression of glucocorticoid receptor and glucocorticoid response element-DNA binding in rat brain during alcohol drinking and withdrawal. J Pharmacol Exp Ther 2002; 301:774-84. [PMID: 11961084 DOI: 10.1124/jpet.301.2.774] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
To define the molecular mechanisms of abnormal hypothalamic pituitary adrenal (HPA) axis during ethanol dependence, we investigated the effect of chronic ethanol treatment (15 days) and its withdrawal (24 h) on the expression of glucocorticoid receptors (GRs) and glucocorticoid response element (GRE)-DNA binding in the rat brain. The effects of chronic mianserin [serotonin (5-HT)(2A/2C) antagonist] treatment on these parameters in various brain structures of control diet-fed and ethanol-fed rats were also investigated. It was found that ethanol treatment and withdrawal significantly decreased the GR protein levels in cortical (cingulate gyrus, frontal, parietal, and piriform cortex) and amygdaloid (central, medial, and basolateral) structures and paraventricular nucleus (PVN) of hypothalamus of rats. It was also observed that ethanol treatment produced significant reductions in GR protein levels in various hippocampal structures (CA1, CA2, CA3, and dentate gyrus), but these changes were normalized during ethanol withdrawal. Ethanol treatment also significantly decreased GRE-DNA binding in rat cortex and hippocampus, which remained decreased in the cortex but reverted to normal in hippocampus during ethanol withdrawal. Chronic mianserin (alone) treatment had no effect on cortical GRE-DNA binding and GR protein levels in cortical, amygdaloid, or PVN structures but significantly decreased the GR protein expression in various hippocampal structures and GRE-DNA binding in whole hippocampus. However, when administered concurrently with ethanol treatment, mianserin significantly antagonized the reductions in cortical GRE-DNA binding and in GR protein expression in cortical, PVN, and central, but not medial and basolateral, amygdaloid structures during ethanol withdrawal. On the other hand, mianserin treatment along with ethanol administration significantly decreased the hippocampal GRE-DNA binding and GR protein expression in various hippocampal structures during ethanol withdrawal. Furthermore, ethanol treatment and its withdrawal or mianserin treatment had no effect on the neuron-specific nuclear protein levels in the various brain structures. Taken together, these results indicate that interaction of 5-HT(2A/2C) receptors with GRs in cortical, central amygdaloid, and PVN structures may play a role in neural mechanisms of alcohol dependence. It is possible that decreased GR expression in PVN may be responsible for the abnormal HPA axis during ethanol exposure and withdrawal.
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MESH Headings
- Adaptation, Biological
- Alcohol Drinking/blood
- Alcohol Drinking/drug therapy
- Alcohol Drinking/metabolism
- Animals
- Cerebral Cortex/drug effects
- Cerebral Cortex/metabolism
- DNA/metabolism
- Disease Models, Animal
- Ethanol/blood
- Ethanol/therapeutic use
- Glucocorticoids/physiology
- Hippocampus/drug effects
- Hippocampus/metabolism
- Male
- Mianserin/therapeutic use
- Neurons/drug effects
- Neurons/physiology
- Pituitary-Adrenal System/metabolism
- Rats
- Rats, Sprague-Dawley
- Receptor, Serotonin, 5-HT2A
- Receptor, Serotonin, 5-HT2C
- Receptors, Glucocorticoid/biosynthesis
- Receptors, Glucocorticoid/metabolism
- Receptors, Serotonin/metabolism
- Substance Withdrawal Syndrome/blood
- Substance Withdrawal Syndrome/drug therapy
- Substance Withdrawal Syndrome/metabolism
- Time Factors
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Affiliation(s)
- Adip Roy
- The Psychiatric Institute, Department of Psychiatry, University of Illinois at Chicago, 60612, USA
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Rasmussen DD, Boldt BM, Bryant CA, Mitton DR, Larsen SA, Wilkinson CW. Chronic Daily Ethanol and Withdrawal: 1. Long-Term Changes in the Hypothalamo-Pituitary-Adrenal Axis. Alcohol Clin Exp Res 2000. [DOI: 10.1111/j.1530-0277.2000.tb01988.x] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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DI SCLAFANI VICTORIA, TRURAN DIANAL, BLOOMER COURTNAY, TOLOU-SHAMS MARINA, CLARK HWESTLEY, NORMAN DAVID, HANNAUER DAVID, FEIN GEORGE. Abstinent chronic crack-cocaine and crackcocaine/alcohol abusers evidence normal hippocampal volumes on MRI despite persistent cognitive impairments. Addict Biol 1998; 3:261-70. [PMID: 26734920 DOI: 10.1080/13556219872074] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
We measured hippocampal volumes and cognitive functioning in crack-cocaine and crack-cocaine/alcoholdependent subjects (abstinent approximately 10-12 weeks) compared to age-matched controls. Cognitive function was evaluated using the computerized MicroCog Assessment of Cognitive Functioning (which includes tests of explicit, declarative memory subserved by the hippocampus). The hippocampal volumes were quantified on T1-weighted MRIs and were expressed as a proportion of intracranial vault volume. Both subjects and controls showed the larger right versus left hippocampal volume expected in normal anatomy, but we found no differences in hippocampal volume between any of the groups. However, both abstinent cocaine-dependent subjects and abstinent cocaine/alcohol-dependent subjects showed persistent cognitive impairments, including deficits in explicit memory. Our results suggest that either: (1) the hippocampus is resistant to structural volume loss in young and middle-aged cocaine or cocaine/alcohol-dependent subjects, (2) the hippocampal volume loss suffered by young and middle-aged cocaine or cocaine/alcohol-dependent subjects resolves after approximately 3 months of abstinence, or (3) hippocampal atrophy is obscured by the process of gliosis. Further, the cognitive impairments persisting in these abstinent cocaine and cocaine/alcohol-dependent samples may (1) be unrelated to hippocampal function or (2) be associated with abnormal hippocampal function that is not reflected in MRI measures of overall hippocampal atrophy.
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15
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Affiliation(s)
- R K Pitman
- VA Medical Center, Manchester, New Hampshire 03103, USA.
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