Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0021051 (immunodeficiency)
 71,517 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Morbidity, mortality, and drug treatment data suggest that methamphetamine use is on the rise. Based on research findings of the sexual behaviors of methamphetamine-using injection drug users, we chose to examine the relationship between methamphetamine use during sex and risky sexual behaviors and human immunodeficiency virus (HIV) seropositivity among clients of publicly funded HIV testing sites in California who reported never injecting drugs. We found that among gay, bisexual, and heterosexual men and heterosexual women, users of methamphetamines reported more sexual partners than non-methamphetamine users. Among heterosexuals, a greater percentage of methamphetamine users than nonusers participated in anal intercourse. Methamphetamine use was independently related to decreased condom use during vaginal and anal intercourse, prostitution, and sex with known injection drug users. In addition, methamphetamine users were more likely to have had a sexually transmitted disease. When controlling for race or ethnicity; age; exposure to possibly infected blood or blood products; and the use of cocaine, alcohol, or marijuana during sex, methamphetamine-using bisexual men were more likely to test positive for HIV than those reporting no history of methamphetamine use. Our data suggest that noninjection methamphetamine use is related to increased, unprotected sexual activity and the risk of contracting sexually transmitted diseases, including HIV.
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PMID:Association of methamphetamine use during sex with risky sexual behaviors and HIV infection among non-injection drug users. 949 42

Drug injection and other practices affecting the risk of human immunodeficiency virus (HIV) infection were studied among 154 heroin users and 45 methamphetamine users in San Antonio, Texas. Amphetamine users were younger, mostly white, and had less-severe drug dependence. Heroin users had significantly higher levels of needle risk, as indicated by frequency of injection, number of persons sharing equipment, and place of injection. Methamphetamine users tended to buy syringes in lots of 10 or more from pharmacies and to use a syringe less than 5 times before discarding it. Heroin users tended to buy 1 needle at a time from an illicit source and to use it more than 20 times. Of methamphetamine users, 71% had more than one sex partner, compared to 39% of heroin users. Partners of methamphetamine users were more likely to be drug injectors than were partners of heroin users. Fewer methamphetamine users reported a behavior change in response to the acquired immunodeficiency syndrome (AIDS) epidemic, and fewer had been contacted by AIDS Education/Outreach. We suggest that efforts to promote risk reduction among methamphetamine users be stepped up because this population has been underserved and because less-sweeping behavior changes are needed to reduce needle-related risks to acceptable levels.
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PMID:An ethnographic comparison of HIV risk behaviors among heroin and methamphetamine injectors. 1007 75

Our primary objective was to examine the relationship between methamphetamine use and sexual risk-taking behaviors--number of sexual partners, frequency of sexual behaviors with regular and casual partners, trading money or drugs for sex, and condom use--among male and female out-of-treatment injection drug users (OTIDUs). As a risk group for human immunodeficiency virus (HIV) transmission, we also investigated injection behaviors by methamphetamine use. Data were collected from 1392 OTIDUs within the California counties of Fresno, Sacramento, and San Diego. Excluded from this cross-sectional survey were male OTIDUs engaging in sex with only or mostly men since 1978. In bivariate analyses, we found that male OTIDUs with a history of methamphetamine use had more sex partners and participated in more acts of anal insertive intercourse with casual partners and vaginal intercourse with regular and casual partners than male OTIDUs never using methamphetamines. In addition, a greater percentage of male OTIDUs using methamphetamines reported trading sex for money or drugs. Methamphetamine-using female OTIDUs participated in more acts of vaginal intercourse with regular male sex partners than female OTIDUs never using methamphetamines. By multivariate logistic regression, we found methamphetamine use related to consistent condom use among male OTIDUs and among male sex partners of female OTIDUs. Discriminant function analyses revealed that sexual risk taking could be differentiated by methamphetamine use among male OTIDUs. Methamphetamine use also correlated with using shared needles or syringes among male and female OTIDUs and was related to not always disinfecting used needles or syringes with bleach. Our findings suggest that methamphetamines may contribute to heterosexual HIV transmission.
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PMID:Methamphetamine use and sexual and injection risk behaviors among out-of-treatment injection drug users. 1047 10

Human immunodeficiency virus (HIV) infection among substance abusers is on the rise worldwide. Psychostimulants, and in particular methamphetamine (METH), have detrimental effects on the immune system as well as causing a progressive neurodegeneration, similar to HIV infection. Many Lentivirinae, including feline immunodeficiency virus (FIV), penetrate into the central nervous system early in the course of infection with astrocytes serving as a reservoir of chronic brain infection. We demonstrate that the FIV-Maryland isolate infects feline primary and cell line (G355-5)-cultured astrocytes only under cell-associated conditions. Infected astrocytes yielded a new astrocytotropic isolate, capable of cell-free infection (termed FIV-MD-A). This isolate contained four amino acid substitutions in the envelope polyprotein resulting in a change in net charge as compared to FIV-MD. Infection for both isolates was dependent upon a functional astrocyte CXCR4 receptor. Methamphetamine increased significantly FIV replication in feline astrocytes for cell-associated infection only, with no effect on peripheral blood mononuclear cells or astrocytes infected with FIV-MD-A. This viral replication was related to proviral copy number, suggesting the effect of METH is at the viral entry or integration into host genome levels, but not at the translational level. Thus, lentiviral infection of the brain in the presence of the psychostimulant METH may result in enhanced astrocyte viral replication, producing a more rapid and increased brain viral load.
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PMID:Methamphetamine enhances cell-associated feline immunodeficiency virus replication in astrocytes. 1205 70

The stability of human immunodeficiency virus, type 1 (HIV-1), strain IIIB, was studied in liquid preparations of homemade drugs. The "Vint" preparation (containing Methamphetamine and obtained from Ephedrine) as well as "Khanka" (a liquid surrogate opiate made from poppy straw) were analyzed within the case study. HIV-1/IIIB was shown to maintain its infectious activity in "Khanka" at room temperature for least 7 days. The HIV-1 activity in neutralized "Vint" did not essentially change after a 30-minute incubation at pH 7.0. While an incubation in the acid "Vint" solution entailed a more rapidly decreasing activity. However, the virus infection ability preserved during the entire time period, during which the drug was fit for injections, i.e. for 30 minutes at room temperature or for 20 hours at 4 degrees C. Therefore, the infection virus could well preserve in the "Khanka" and "Vint" solutions after its entry, with infected blood, of large volumes of the discussed drugs. The mentioned big volumes of HIV-1 contaminated drugs, shared later into ready-to-use portions, could be the cause for HIV-1 dissemination among those who practice the parenteral administration of these substances. Besides, "Khanka" was shown to have little or no effect on the virus replication to cell culture MT-4. Its presence brought about an insignificant 1.5-fold increase in the viral stock (observed on days 2 and 3 after contamination) only when 2 x 10(5) MT-4 cells per ml and HIV-1/IIIB TCID 50 0.005 were used.
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PMID:[Effect of home-made narcotics on infectious activity of HIV-1]. 1470 26

The use of the recreational drug crystal methamphetamine among younger homosexual men is expanding, and with it, unsafe sex behaviors that increase the transmission of human immunodeficiency virus (HIV). This article reviews available literature on the medical and psychiatric morbidities associated with methamphetamine abuse in HIV-infected patients. Medical complications include hypertension, hyperthermia, rhabdoymyolysis, and stroke. One fatal case of ingestion of methamphetamine with HIV medication has been documented. Two fatal cases of ingestion of HIV medication with the amphetamine analogue n-methyl-3,4 methylenedioxymethamphetamine (MDMA, or "ecstasy") have also been reported. Some molecular researchers suggest that dopaminergic systems are vulnerable to the combined neurotoxicity of HIV infection and methamphetamine. Population surveys indicate high rates of HIV infection among methamphetamine abusers and high rates of unprotected anal intercourse during drug intoxication. Intoxication can sometimes produce paranoia, auditory hallucinations, and, occasionally, violent behavior. Amphetamine withdrawal commonly results in symptoms of depression. Methamphetamine is a new challenge related to treatment and prevention of HIV infection.
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PMID:Crystal methamphetamine, its analogues, and HIV infection: medical and psychiatric aspects of a new epidemic. 1499 36

Methamphetamine (meth) is a highly addictive stimulant that gained widespread popularity in California in the 1980s and has since spread to most regions of the United States, including rural areas. Analyses of survey data among noninjection-drug users from California in the mid-1990s determined that, among heterosexual persons and among men who had sex with men (MSM), meth users reported more sex partners, were less likely to report condom use, and were more likely to report sex in exchange for money or drugs, sex with an injection-drug user, and history of a sexually transmitted disease (STD). Subsequent studies among MSM have indicated an association between meth use and sexual risk behaviors, syphilis infection, and incidence of human immunodeficiency virus (HIV) infection. Subsequent studies among heterosexual populations have been less extensive than those among MSM and often have not used population-based samples nor adjusted for possible confounders. To further assess the association between meth use and high-risk sexual behaviors among heterosexual men, the California Department of Health Services, Office of AIDS, analyzed population-based data from five northern California counties in the HEY-Man (Health Evaluation in Young Men) Study. This report summarizes the results of that analysis, which determined that recent meth use was associated with high-risk sexual behaviors, including sex with a casual or anonymous female partner, anal intercourse, and sex with an injection-drug user. The results suggest the need for states to consider including referrals to meth prevention and treatment programs in their HIV prevention programs and for broader assessment of the relation between meth use and high-risk sexual behaviors.
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PMID:Methamphetamine use and HIV risk behaviors among heterosexual men--preliminary results from five northern California counties, December 2001-November 2003. 1654 81

Methamphetamine is a stimulant commonly abused in many parts of the United States. Most methamphetamine users are white men 18 to 25 years of age, but the highest usage rates have been found in native Hawaiians, persons of more than one race, Native Americans, and men who have sex with men. Methamphetamine use produces a rapid, pleasurable rush followed by euphoria, heightened attention, and increased energy. Possible adverse effects include myocardial infarction, stroke, seizures, rhabdomyolysis, cardiomyopathy, psychosis, and death. Chronic methamphetamine use is associated with neurologic and psychiatric symptoms and changes in physical appearance. High-risk sexual activity and transmission of human immunodeficiency virus are also associated with methamphetamine use. Use of methamphetamine in women who are pregnant can cause placental abruption, intrauterine growth retardation, and preterm birth, and there can be adverse consequences in children exposed to the drug. Treatment of methamphetamine intoxication is primarily supportive. Treatment of methamphetamine abuse is behavioral; cognitive behavior therapy, contingency management, and the Matrix Model may be effective. Pharmacologic treatments are under investigation.
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PMID:Methamphetamine abuse. 1799 Aug 40

Very little is known about the interactions between hepatitis C virus (HCV) and methamphetamine, which is a highly abused psychostimulant and a known risk factor for human immunodeficiency virus (HIV)/HCV infection. This study examined whether methamphetamine has the ability to inhibit innate immunity in the host cells, facilitating HCV replication in human hepatocytes. Methamphetamine inhibited intracellular interferon alpha expression in human hepatocytes, which was associated with the increase in HCV replication. In addition, methamphetamine also compromised the anti-HCV effect of recombinant interferon alpha. Further investigation of mechanism(s) responsible for the methamphetamine action revealed that methamphetamine was able to inhibit the expression of the signal transducer and activator of transcription 1, a key modulator in interferon-mediated immune and biological responses. Methamphetamine also down-regulated the expression of interferon regulatory factor-5, a crucial transcriptional factor that activates the interferon pathway. These in vitro findings that methamphetamine compromises interferon alpha-mediated innate immunity against HCV infection indicate that methamphetamine may have a cofactor role in the immunopathogenesis of HCV disease.
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PMID:Methamphetamine enhances Hepatitis C virus replication in human hepatocytes. 1830 90

We examined human immunodeficiency virus (HIV)-related risk behaviors among methamphetamine (MA)-dependent users. Secondary data analysis was performed on data from a large clinical trial: The Methamphetamine Treatment Project (N = 784). All MA-dependent participants were enrolled in an outpatient treatment program, receiving either a standardized psychosocial protocol (Matrix model) or treatment-as-usual. HIV-related risk behavior, including injection and unsafe sexual practices, was assessed using the AIDS Risk Assessment at baseline, treatment discharge, and 6, 12, and 36 months following treatment participation. Results indicated that HIV risk behaviors substantially decreased over time. Treatment factors (retention and completion) and frequency of MA use were both positively associated with increased reduction of HIV risk behaviors. The findings suggested that treatment of MA dependence is promising for reducing behaviors that have been shown to transmit HIV.
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PMID:Methamphetamine dependence and human immunodeficiency virus risk behavior. 1832 25


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