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Machado da Silva MC, Iglesias LP, Candelario-Jalil E, Khoshbouei H, Moreira FA, de Oliveira ACP. Role of Microglia in Psychostimulant Addiction. Curr Neuropharmacol 2023; 21:235-259. [PMID: 36503452 PMCID: PMC10190137 DOI: 10.2174/1570159x21666221208142151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 12/14/2022] Open
Abstract
The use of psychostimulant drugs can modify brain function by inducing changes in the reward system, mainly due to alterations in dopaminergic and glutamatergic transmissions in the mesocorticolimbic pathway. However, the etiopathogenesis of addiction is a much more complex process. Previous data have suggested that microglia and other immune cells are involved in events associated with neuroplasticity and memory, which are phenomena that also occur in addiction. Nevertheless, how dependent is the development of addiction on the activity of these cells? Although the mechanisms are not known, some pathways may be involved. Recent data have shown psychoactive substances may act directly on immune cells, alter their functions and induce various inflammatory mediators that modulate synaptic activity. These could, in turn, be involved in the pathological alterations that occur in substance use disorder. Here, we extensively review the studies demonstrating how cocaine and amphetamines modulate microglial number, morphology, and function. We also describe the effect of these substances in the production of inflammatory mediators and a possible involvement of some molecular signaling pathways, such as the toll-like receptor 4. Although the literature in this field is scarce, this review compiles the knowledge on the neuroimmune axis that is involved in the pathogenesis of addiction, and suggests some pharmacological targets for the development of pharmacotherapy.
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Affiliation(s)
- Maria Carolina Machado da Silva
- Department of Pharmacology, Neuropharmacology Laboratory, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil;
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Lia Parada Iglesias
- Department of Pharmacology, Neuropsychopharmacology Laboratory, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Habibeh Khoshbouei
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Fabrício Araujo Moreira
- Department of Pharmacology, Neuropsychopharmacology Laboratory, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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M1 and M3 muscarinic receptors may play a role in the neurotoxicity of anhydroecgonine methyl ester, a cocaine pyrolysis product. Sci Rep 2015; 5:17555. [PMID: 26626425 PMCID: PMC4667193 DOI: 10.1038/srep17555] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 11/02/2015] [Indexed: 01/12/2023] Open
Abstract
The smoke of crack cocaine contains cocaine and its pyrolysis product, anhydroecgonine methyl ester (AEME). AEME possesses greater neurotoxic potential than cocaine and an additive effect when they are combined. Since atropine prevented AEME-induced neurotoxicity, it has been suggested that its toxic effects may involve the muscarinic cholinergic receptors (mAChRs). Our aim is to understand the interaction between AEME and mAChRs and how it can lead to neuronal death. Using a rat primary hippocampal cell culture, AEME was shown to cause a concentration-dependent increase on both total [3H]inositol phosphate and intracellular calcium, and to induce DNA fragmentation after 24 hours of exposure, in line with the activation of caspase-3 previously shown. Additionally, we assessed AEME activity at rat mAChR subtypes 1–5 heterologously expressed in Chinese Hamster Ovary cells. l-[N-methyl-3H]scopolamine competition binding showed a preference of AEME for the M2 subtype; calcium mobilization tests revealed partial agonist effects at M1 and M3 and antagonist activity at the remaining subtypes. The selective M1 and M3 antagonists and the phospholipase C inhibitor, were able to prevent AEME-induced neurotoxicity, suggesting that the toxicity is due to the partial agonist effect at M1 and M3 mAChRs, leading to DNA fragmentation and neuronal death by apoptosis.
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Zhang X, Jiang S, Yu J, Kuzontkoski PM, Groopman JE. Cocaine enhances HIV-1 gp120-induced lymphatic endothelial dysfunction in the lung. Physiol Rep 2015; 3:3/8/e12482. [PMID: 26311830 PMCID: PMC4562568 DOI: 10.14814/phy2.12482] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Pulmonary complications are common in both AIDS patients and cocaine users. We addressed the cellular and molecular mechanisms by which HIV and cocaine may partner to induce their deleterious effects. Using primary lung lymphatic endothelial cells (L-LECs), we examined how cocaine and HIV-1 gp120, alone and together, modulate signaling and functional properties of L-LECs. We found that brief cocaine exposure activated paxillin and induced cytoskeletal rearrangement, while sustained exposure increased fibronectin (FN) expression, decreased Robo4 expression, and enhanced the permeability of L-LEC monolayers. Moreover, incubating L-LECs with both cocaine and HIV-1 gp120 exacerbated hyperpermeability, significantly enhanced apoptosis, and further impaired in vitro wound healing as compared with cocaine alone. Our studies also suggested that the sigma-1 receptor (Sigma-1R) and the dopamine-4 receptor (D4R) are involved in cocaine-induced pathology in L-LECs. Seeking clinical correlation, we found that FN levels in sera and lung tissue of HIV(+) donors were significantly elevated as compared to HIV(-) donors. Our in vitro data demonstrate that cocaine and HIV-1 gp120 induce dysfunction and damage of lung lymphatics, and suggest that cocaine use may exacerbate pulmonary edema and fibrosis associated with HIV infection. Continued exploration of the interplay between cocaine and HIV should assist the design of therapeutics to ameliorate HIV-induced pulmonary disorders within the drug using population.
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Affiliation(s)
- Xuefeng Zhang
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, Massachusetts, USA
| | - Susan Jiang
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, Massachusetts, USA
| | - Jinlong Yu
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, Massachusetts, USA Department of Psychiatry, Mclean Hospital Harvard Medical School, Belmont, Massachusetts, USA
| | - Paula M Kuzontkoski
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, Massachusetts, USA DynaMed, EBSCO Information Services, Ipswich, Massachusetts, USA
| | - Jerome E Groopman
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, Massachusetts, USA
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Kim SG, Lowe EL, Dixit D, Youn CS, Kim IJ, Jung JB, Rovner R, Zack JA, Vatakis DN. Cocaine-mediated impact on HIV infection in humanized BLT mice. Sci Rep 2015; 5:10010. [PMID: 26084721 PMCID: PMC4471720 DOI: 10.1038/srep10010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 03/17/2015] [Indexed: 11/26/2022] Open
Abstract
Cocaine abuse has been shown to have broad-ranging effects on human immunity. With regards to HIV infection, in vitro studies have shown that cocaine enhances infection of stimulated lymphocytes. Moreover, cohort studies in the pre- and post-HAART era have linked stimulant abuse with increased HIV pathogenesis. The latter data, however, have been undermined by a series of confounding factors underscoring the importance of controlled in vivo models to fully assess the impact of cocaine use and abuse on HIV infection and pathogenesis. Here, we have infected humanized mice with HIV-1 following acute cocaine exposure to assess the impact on infection. Stimulant exposure resulted in increased inflammatory cytokine expression, accelerated HIV infection, while blunting effector function of cytotoxic T lymphocytes. These data demonstrate cocaine’s multifactorial impact on HIV infection that extends beyond high-risk behavior.
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Affiliation(s)
- Sohn G Kim
- 1] Department of Medicine, Division of Hematology-Oncology [2] UCLA AIDS Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095
| | - Emily L Lowe
- 1] Department of Medicine, Division of Hematology-Oncology [2] UCLA AIDS Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095
| | - Dhaval Dixit
- 1] Department of Medicine, Division of Hematology-Oncology [2] UCLA AIDS Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095
| | - Cindy Seyeon Youn
- 1] Department of Medicine, Division of Hematology-Oncology [2] UCLA AIDS Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095
| | - Irene J Kim
- 1] Department of Medicine, Division of Hematology-Oncology [2] UCLA AIDS Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095
| | - James B Jung
- Department of Microbiology, Immunology and Molecular Genetics
| | - Robert Rovner
- Department of Molecular, Cell and Developmental Biology
| | - Jerome A Zack
- 1] Department of Medicine, Division of Hematology-Oncology [2] UCLA AIDS Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095 [3] Department of Microbiology, Immunology and Molecular Genetics
| | - Dimitrios N Vatakis
- 1] Department of Medicine, Division of Hematology-Oncology [2] UCLA AIDS Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095
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Goel N, Pullman JM, Coco M. Cocaine and kidney injury: a kaleidoscope of pathology. Clin Kidney J 2014; 7:513-7. [PMID: 25859366 PMCID: PMC4389131 DOI: 10.1093/ckj/sfu092] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/13/2014] [Indexed: 12/21/2022] Open
Abstract
Cocaine is abused worldwide as a recreational drug. It is a potent activator of the sympathetic nervous system leading to intense vasoconstriction, endothelial dysfunction, oxidative stress, platelet activation and decrease in prostaglandins E2 and prostacyclin. Cocaine can lead to widespread systemic adverse effects such as stroke, myocardial infarction, arterial dissection, vascular thrombosis and rhabdomyolysis. In human and rat kidneys, cocaine has been associated with glomerular, tubular, vascular and interstitial injury. It is not uncommon to diagnose cocaine-related acute kidney injury (AKI), malignant hypertension and chronic kidney disease. Cocaine abuse can lead to AKI by rhabdomyolysis, vasculitis, infarction, thrombotic microangiopathy and malignant hypertension. It is reported that 50–60% of people who use both cocaine and heroin are at increased risk of HIV, hepatitis and additional risk factors that can cause kidney diseases. While acute interstitial nephritis (AIN) is a known cause of AKI, an association of AIN with cocaine is unusual and seldom reported. We describe a patient with diabetes mellitus, hypertension and chronic hepatitis C, who presented with AKI. Urine toxicology was positive for cocaine and a kidney biopsy was consistent with AIN. Illicit drugs such as cocaine or contaminants may have caused AIN in this case and should be considered in the differential diagnosis of causes of AKI in a patient with substance abuse. We review the many ways that cocaine adversely impacts on kidney function.
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Affiliation(s)
- Narender Goel
- Division of Nephrology and Hospital Medicine , Middletown Medical PC and Orange Regional Medical Center , Middletown, NY , USA ; Division of Nephrology , Montefiore Medical Center & Albert Einstein College of Medicine , Bronx, NY , USA
| | - James M Pullman
- Division of Pathology , Montefiore Medical Center & Albert Einstein College of Medicine , Bronx, NY , USA
| | - Maria Coco
- Division of Nephrology , Montefiore Medical Center & Albert Einstein College of Medicine , Bronx, NY , USA
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Kim SG, Jung JB, Dixit D, Rovner R, Zack JA, Baldwin GC, Vatakis DN. Cocaine exposure enhances permissiveness of quiescent T cells to HIV infection. J Leukoc Biol 2013; 94:835-43. [PMID: 23817564 PMCID: PMC3774841 DOI: 10.1189/jlb.1112566] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 06/13/2013] [Accepted: 06/18/2013] [Indexed: 01/19/2023] Open
Abstract
In vivo and in vitro exposure to stimulants has been associated with increased levels of HIV infection in PBMCs. Among these lymphocyte subsets, quiescent CD4(+) T cells make up the majority of circulating T cells in the blood. Others and we have demonstrated that HIV infects this population of cells inefficiently. However, minor changes in their cell state can render them permissive to infection, significantly impacting the viral reservoir. We have hypothesized that stimulants, such as cocaine, may perturb the activation state of quiescent cells enhancing permissiveness to infection. Quiescent T cells isolated from healthy human donors were exposed to cocaine and infected with HIV. Samples were harvested at different time-points to assess the impact of cocaine on their susceptibility to infection at various stages of the HIV life cycle. Our data show that a 3-day exposure to cocaine enhanced infection of quiescent cells, an effect that appears to be mediated by σ1R and D4R. Overall, our results indicate that cocaine-mediated effects on quiescent T cells may increase the pool of infection-susceptible T cells. The latter underscores the impact that stimulants have on HIV-seropositive individuals and the challenges posed for treatment.
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Affiliation(s)
- Sohn G Kim
- 1.David Geffen School of Medicine, 615 Charles E. Young Dr. S., BSRB 173, Mail Code 736322, Los Angeles, CA 90095, USA. ; Twitter: https://twitter.com/vatakisd
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7
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Iñiguez MA, Punzón C, Nieto R, Burgueño J, Vela JM, Fresno M. Inhibitory effects of sigma-2 receptor agonists on T lymphocyte activation. Front Pharmacol 2013; 4:23. [PMID: 23494519 PMCID: PMC3595506 DOI: 10.3389/fphar.2013.00023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 02/18/2013] [Indexed: 12/02/2022] Open
Abstract
Sigma (σ) receptor ligands are essentially known for their effects on the nervous system although recent studies have shown their potential effects modulating some other pathophysiological processes as cell proliferation, cancer, and the immune response. Here, we have analyzed the actions of σ-1 and σ-2 receptors ligands on T cell activation. Our results show that treatment of Jurkat T cells with σ-2 agonists decreased the induction of the expression of Interleukin (IL)-2, Tumor necrosis factor (TNF)-α, and Cyclooxygenase (COX)-2 by activated T cells in a dose-dependent manner. These effects take place at the transcriptional level since σ-2 agonists BD-737 and CB-184 diminished the activity of the promoters of those genes. Those immunosuppressive effects could be attributable to interference with transcription factor activation. Induced transcription mediated by Nuclear factor (NF)-κB or Nuclear Factor of Activated T cells (NFAT) was inhibited by σ-2 agonists. These effects seem to be specific for σ-2 agonists as no significant effects on T cell activation by σ-1 ligands PRE-084 and BD-1063 were found. Our results provide new insights into the immunomodulatory actions of σ ligands and describe a new property of σ-2 agonists, through inhibition of activation of transcription factors as NFAT by which these compounds are regulating gene expression. This may have important consequences on the possible therapeutic use of those compounds.
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Affiliation(s)
- Miguel A Iñiguez
- Departamento de Biología Molecular and Instituto de Investigación Sanitaria Princesa, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid Nicolás Cabrera, Madrid, Spain
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8
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Schuster RM, Gonzalez R. Substance Abuse, Hepatitis C, and Aging in HIV: Common Cofactors that Contribute to Neurobehavioral Disturbances. ACTA ACUST UNITED AC 2012; 2012:15-34. [PMID: 24014165 DOI: 10.2147/nbhiv.s17408] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Although the prevalence of neurocognitive disturbances among individuals with HIV has decreased in recent years, rates of impairment still remain high. This review presents findings from comorbid conditions that may contribute to further neurocognitive impairments in this already vulnerable population. We will focus on three co-factors that have received substantial attention in the neuroAIDS literature: drug use, hepatitis C co-infection (HCV), and aging. All three conditions commonly co-occur with HIV and likely interact with HIV in complex ways. Collectively, the extant literature suggests that drug use, HCV, and aging serve to worsen the neurocognitive profile of HIV through several overlapping mechanisms. A better understanding of how specific comorbidities interact with HIV may reveal specific phenotypes of HIV-associated neurocognitive disorder that may aid in the development of more targeted behavioral and pharmacological treatment efforts.
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9
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Thomas KR, Thomas SP, Hewan-Lowe KO, Pestaner JP. Fibromuscular dysplasia in association with intrauterine cocaine exposure. Cardiovasc Pathol 2007; 16:313-6. [PMID: 17868884 DOI: 10.1016/j.carpath.2006.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2006] [Revised: 11/14/2006] [Accepted: 12/29/2006] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Fibromuscular dysplasia (FMD) is an idiopathic disease of small- and medium-sized arteries, involving one or more vascular beds. Patients may present with a range of symptoms, which may not readily lead to a diagnosis of FMD. While maternal cocaine abuse during pregnancy has previously been associated with vascular alterations in the fetus, an association specifically with FMD has not previously been described. METHODS/RESULTS In this case report, a 21-month-old male presented with a 3-week history of daily vomiting, with temporary improvement of symptoms, then relapse followed by loss of consciousness. His medical history was significant only for maternal cocaine use. Clinical evaluation revealed dilated cardiomyopathy, and a presumptive diagnosis of myocarditis was rendered. Respiratory arrest and death occurred 2 days after admission. Postmortem examination demonstrated intimal-type multivessel FMD, which was determined to be the cause of the clinical presentation. CONCLUSION Without a postmortem examination, it is unlikely that a diagnosis of intimal fibroplasia, a rare variant of FMD (5% of cases), would have been made. This case thus illustrates the continuing utility of the classic postmortem examination. More intriguingly, the case suggests a possible relationship between in utero cocaine exposure and the development of fibromuscular dysplasia in the child.
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Affiliation(s)
- Kevin R Thomas
- Department of Pathology, Brody School of Medicine at East Carolina University and Pitt County Memorial Hospital, Greenville, NC 27858, USA.
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10
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Zoghby Z, Sekhon IS, Miller DV, Sethi S. Cocaine, loin pain, and renal vein thrombosis. Am J Kidney Dis 2007; 49:859-61. [PMID: 17533030 DOI: 10.1053/j.ajkd.2007.02.269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2006] [Accepted: 02/22/2007] [Indexed: 11/11/2022]
Abstract
We report an unusual renal complication of cocaine abuse in a young man who developed loin pain, renal vein thrombosis, and acute renal failure. Cocaine abuse should be considered in the differential diagnosis of renal vein thrombosis in young adults.
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Substance Abuse and the Heart. CARDIOVASCULAR MEDICINE 2007. [DOI: 10.1007/978-1-84628-715-2_113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Abstract
Cocaine-associated chest pain is a clinical entity that crosses all socioeconomic groups and hence will be encountered by many physicians. The initial evaluation and treatment of cocaine-induced chest pain are similar to those of patients who have non-cocaine-induced chest pain, but there are several notable exceptions. This article reviews the pathophysiology, evaluation, management, and disposition decisions unique to patients presenting with cocaine-induced chest pain.
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Affiliation(s)
- James H Jones
- Department of Emergency Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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13
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Abstract
Cocaine is the second commonest illicit drug used and the most frequent cause of drug related deaths. Its use is associated with both acute and chronic complications that may involve any system, the most common being the cardiovascular system. Cocaine misuse has a major effect in young adult drug users with resulting loss of productivity and undue morbidity with cocaine related cardiac and cerebrovascular effects. Many cocaine users have little or no idea of the risks associated with its use. Patients, health care professionals, and the public should be educated about the dangers and the considerable risks of cocaine use. This review concentrates on the cardiovascular effects of cocaine and their management.
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Affiliation(s)
- M Egred
- Cardiothoracic Centre, Thomas Drive, Liverpool L14 3PE, UK.
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Pozner CN, Levine M, Zane R. The cardiovascular effects of cocaine. J Emerg Med 2005; 29:173-8. [PMID: 16029829 DOI: 10.1016/j.jemermed.2005.01.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2003] [Revised: 11/25/2004] [Accepted: 01/26/2005] [Indexed: 10/25/2022]
Abstract
Cocaine use continues to be prevalent among all races and socioeconomic groups in the United States. Patients presenting to emergency departments after cocaine ingestion frequently present with a chief complaint of chest pain. Although acute myocardial infarction is perhaps the most concerning diagnosis in this setting, there are many other potential causes of chest pain after cocaine ingestion. This article reviews the pharmacology of cocaine, as well as the etiologies and treatment of cocaine-associated chest pain, with an emphasis on this drug's range of cardiovascular effects.
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Affiliation(s)
- Charles N Pozner
- Department of Emergency Medicine, Brigham and Women's Hospital, Harvard University, 75 Francis Street, Boston, MA 02115, USA
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Abstract
The pathophysiology of cocaine leading to myocardial ischemia is multifactorial. Given the paucity of well-designed clinical studies, treatment is directed toward the potential mechanisms involved in the development of myocardial ischemia. Fortunately, morbidity and mortality in this patient population are low, and the vast majority of patients will not suffer AMI or other cardiac complications. Long-term prognosis is excellent for those who abstain from continued cocaine use.
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Affiliation(s)
- James H Jones
- Department of Emergency Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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16
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Affiliation(s)
- G Van Camp
- Department of Cardiology, AZ-VUB, Brussels.
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Gardner B, Zhu LX, Roth MD, Tashkin DP, Dubinett SM, Sharma S. Cocaine modulates cytokine and enhances tumor growth through sigma receptors. J Neuroimmunol 2004; 147:95-8. [PMID: 14741436 DOI: 10.1016/j.jneuroim.2003.10.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Sigma receptors are intracellular receptors that interact with a variety of psychotropic ligands, including cocaine. Administration of cocaine to mice promoted the in vivo growth of a syngeneic lung cancer cell line and identical effects were observed with PRE 084, a selective sigma(1) receptor agonist. Increased tumor growth was accompanied by an increase in IL-10 and a decrease in IFN-gamma production in splenocytes and at the tumor site. The tumor-promoting effects produced by both cocaine and PRE 084 were abrogated by administration of specific antibodies to IL-10, or by administration of a sigma(1) receptor antagonist. We conclude that sigma(1) receptor ligands, including cocaine, augment tumor growth via a cytokine-dependent, receptor-mediated mechanism that involves regulation of T helper 1/T helper 2 cytokine balance.
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Affiliation(s)
- Brian Gardner
- Division of Pulmonary and Critical Care Medicine, David Geffen School of Medicine at the University of California-Los Angeles, Los Angeles, CA 90095, USA.
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Abstract
CONTEXT Brazilian researchers have recently recognized a marked increase in the number of people using abusable drugs and the consequences of this habit. It has become a major public health problem in a potentially productive segment of the general population. In the last few years, several medical articles have given special emphasis to pulmonary complications related to cocaine use. This review is based on this information and experience acquired with groups of cocaine users. OBJECTIVE To present to physicians the pulmonary aspects of cocaine use and warn about the various effects this drug has on the respiratory system, stressing those related to long-term use. DESIGN Narrative review. METHOD Pulmonary complications are described. These may include infections (Staphylococcus aureus, pulmonary tuberculosis, acquired immunodeficiency syndrome/aids, etc.), aspiration pneumonia, lung abscess, empyema, septic embolism, non-cardiogenic pulmonary edema, barotrauma, pulmonary granulomotosis, branchiolitis obliterans and organizing pneumonia, pneumonitis and interstitial fibrosis, pneumonitis hypersensitivity, lung infiltrates and eosinophilia in individuals with branchial hyperreactivity, diffuse alveolar hemorrhage, vasculitis, pulmonary infarction, pulmonary hypertension and alterations in gas exchange. It is concluded that physicians should give special attention to the various pulmonary and clinical manifestations related to cocaine use, particularly in young patients.
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Affiliation(s)
- Mário Terra Filho
- Division of Pulmonary Diseases, Instituto do Coração and Laboratório de Investigação Médica (LIM-40), Department of Legal Medicine, Faculdade de Medicina, Universidade de São Paulo, Brasil.
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Abstract
The use of recreational drugs of abuse has generated serious health concerns. There is a long-recognized relationship between addictive drugs and increased levels of infections. Studies of the mechanisms of actions of these drugs became more urgent with the advent of AIDS and its correlation with abused substances. The nature and mechanisms of immunomodulation by marijuana, opiates, cocaine, nicotine, and alcohol are described in this review. Recent studies of the effects of opiates or marijuana on the immune system have demonstrated that they are receptor mediated, occurring both directly via specific receptors on immune cells and indirectly through similar receptors on cells of the nervous system. Findings are also discussed that demonstrate that cocaine and nicotine have similar immunomodulatory effects, which are also apparently receptor mediated. Finally, the nature and mechanisms of immunomodulation by alcohol are described. Although no specific alcohol receptors have been identified, it is widely recognized that alcohol enhances susceptibility to opportunistic microbes. The review covers recent studies of the effects of these drugs on immunity and on increased susceptibility to infectious diseases, including AIDS.
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Affiliation(s)
- Herman Friedman
- Department of Medical Microbiology and Immunology, College of Medicine, University of South Florida, Tampa, Florida 33612, USA.
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Khocht A, Janal M, Schleifer S, Keller S. The influence of gingival margin recession on loss of clinical attachment in alcohol-dependent patients without medical disorders. J Periodontol 2003; 74:485-93. [PMID: 12747453 DOI: 10.1902/jop.2003.74.4.485] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The objective of this study was to examine the effects of alcohol and cocaine misuse on periodontal status in a group of alcohol-dependent patients. METHODS Forty verified alcoholics, either exclusively (n = 10) or with cocaine abuse (n = 30), and a matched comparison group of 25 non-alcoholic subjects, 14 of whom abused cocaine, were entered in the study. All subjects were free from systemic illnesses. Blood levels of gamma glutamyl transpeptidase (GGTP), a liver enzyme indicator of alcohol drinking, were determined. A comprehensive periodontal examination was performed on 6 sites per tooth. The gingival index (GI) and plaque index (PI) were recorded. Attachment levels (AL) were computed as probing depth (PD) plus gingival margin level (GM). RESULTS No statistically significant differences were noted between the groups for average AL, PD, GM, GI, and PI. In alcoholics, Pearson correlation showed a positive association between GGTP levels and loss of periodontal attachment (P<0.05). A series of regression analyses predicting AL from selected periodontal and demographic factors showed that alcoholics manifest AL by greater increases in GM than non-alcoholics (P<0.07). Severe alcohol use as measured by GGTP >51 iu/l worsens PI (P<0.07), which adversely impacts GM, GI, PD, and ultimately AL. No significant associations were found between cocaine use and AL. CONCLUSIONS The results suggest that persistent alcohol abuse increases periodontitis development by heightening the loss of attachment through recession of gingival margins.
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Affiliation(s)
- Ahmed Khocht
- Medical College of Georgia, School of Dentistry, Augusta, GA 30912-1220, USA.
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Zhu LX, Sharma S, Gardner B, Escuadro B, Atianzar K, Tashkin DP, Dubinett SM. IL-10 mediates sigma 1 receptor-dependent suppression of antitumor immunity. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2003; 170:3585-91. [PMID: 12646621 DOI: 10.4049/jimmunol.170.7.3585] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Sigma receptors are unique endoplasmic reticulum proteins that mediate signaling for a variety of drugs. We determined the effect of sigma(1) receptor agonists on immune responses in a syngeneic lung cancer model. Sigma(1) receptor agonists, including cocaine, up-regulated splenocyte IL-10 mRNA and protein production in vitro in a sigma receptor-dependent, pertussis toxin-sensitive manner. In vivo, sigma(1) receptor agonists promoted tumor growth and induced IL-10 at the tumor site. Increased tumor growth was prevented by administration of specific Abs to IL-10 or by administration of specific sigma(1) receptor antagonists. We report that sigma(1) receptor ligands, including cocaine, augment tumor growth through an IL-10 dependent mechanism.
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MESH Headings
- Adenocarcinoma, Bronchiolo-Alveolar/chemically induced
- Adenocarcinoma, Bronchiolo-Alveolar/immunology
- Adenocarcinoma, Bronchiolo-Alveolar/pathology
- Adenocarcinoma, Bronchiolo-Alveolar/prevention & control
- Adjuvants, Immunologic/agonists
- Adjuvants, Immunologic/metabolism
- Adjuvants, Immunologic/physiology
- Adoptive Transfer
- Animals
- Antibodies, Monoclonal/administration & dosage
- Cell Division/drug effects
- Cell Division/immunology
- Cocaine/administration & dosage
- Cocaine/metabolism
- Cytokines/biosynthesis
- Down-Regulation/drug effects
- Down-Regulation/immunology
- Growth Inhibitors/administration & dosage
- Immunocompetence/drug effects
- Injections, Intraperitoneal
- Injections, Subcutaneous
- Interferon-gamma/antagonists & inhibitors
- Interferon-gamma/metabolism
- Interleukin-10/biosynthesis
- Interleukin-10/immunology
- Interleukin-10/physiology
- Lung Neoplasms/chemically induced
- Lung Neoplasms/immunology
- Lung Neoplasms/pathology
- Lung Neoplasms/prevention & control
- Male
- Mice
- Mice, Inbred BALB C
- Morpholines/administration & dosage
- Morpholines/metabolism
- Neoplasm Transplantation
- Receptors, sigma/agonists
- Receptors, sigma/antagonists & inhibitors
- Receptors, sigma/metabolism
- Receptors, sigma/physiology
- Spleen/cytology
- Spleen/transplantation
- Tumor Cells, Cultured
- Up-Regulation/drug effects
- Up-Regulation/immunology
- Sigma-1 Receptor
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Affiliation(s)
- Li X Zhu
- University of California Los Angeles Lung Cancer Research Program, Jonsson Comprehensive Cancer Center, Los Angeles, CA 90095-1690, USA
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22
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Affiliation(s)
- R A Lange
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas 75390-9047, USA
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23
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Baldwin GC, Roth MD, Tashkin DP. Acute and chronic effects of cocaine on the immune system and the possible link to AIDS. J Neuroimmunol 1998; 83:133-8. [PMID: 9610681 DOI: 10.1016/s0165-5728(97)00229-4] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The pathogenesis of AIDS is a complex and prolonged process that is affected by a variety of cofactors, including the abuse of both intravenous and smoked (crack) cocaine. The exact mechanisms by which cocaine facilitates this disease are yet to be proven, but likely include a combination of increased risk due to cocaine-related social behaviours, a wide-ranging capacity for cocaine to suppress the immune system, and an effect of cocaine on the infectivity and replication of HIV. While sometimes contradictory, both human and animal studies document that cocaine alters the function of natural killer (NK) cells, T cells, neutrophils and macrophages, and alters the ability of these cells to secrete immunoregulatory cytokines. In addition to these effects on the immune system, cocaine also enhances the infectivity and/or replication of HIV when tested using human cells in vitro.
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Affiliation(s)
- G C Baldwin
- Department of Medicine, UCLA School of Medicine, Los Angeles, CA 90095, USA
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