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Query: UMLS:C0019693 (HIV)
 170,526 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Oral lesions have been reported frequently in patients seropositive for human immunodeficiency virus. A case is reported of HIV-associated periodontitis complicated by necrotising stomatitis and the development of an oro-antral fistula; the role of extractions in the management of this condition is highlighted.
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PMID:Oro-antral fistula: an unusual complication of HIV-associated periodontal disease. 187 97

Out of 6 mothers breast-feeding their parenterally infected children in Elista and having no other factors of HIV infection, 3 were found to have antibodies to HIV, as well as 4 women who breast-fed their children dead in the focus of infection, but not examined. Pronounced stomatitis in children and cracks on their mothers' nipples were additional factors leading to HIV infection of mothers.
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PMID:[HIV transmission from child to mother during breast feeding]. 214 63

The majority of patients with Aids suffer from diarrhea and weight loss, as well as opportunistic infection and tumors of the gastrointestinal tract; endoscopy is frequently necessary. Often, but not always, it is possible to identify an opportunistic tumor or infection which explains the patient's signs and symptoms. In other cases, HIV may itself be pathogenic. The most important opportunistic pathogens are Candida albicans (stomatitis and esophagitis), cytomegalovirus and herpes simplex virus (esophagus, stomach, biliary system, colon), cryptosporidium (small intestine, biliary system), Isospora belli (small intestine), salmonella, shigella, and campylobacter (small and large intestine, septicemia), and Mycobacterium avium intracellulare (liver, spleen, intestinal submucosa, and bacteremia). Involvement of the gastrointestinal tract is frequent in Kaposi's sarcoma, though it is often asymptomatic. In contrast, gastrointestinal lymphomas are aggressive and rapidly progressive tumors.
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PMID:[AIDS and gastrointestinal tract: a summary for gastroenterologists and surgeons]. 215 57

Macrophages, unlike CD4+ T cells, can be productively infected by human immunodeficiency virus (HIV) without prior cellular activation. Cytopathic infection ensues without the induction of tumor necrosis factor alpha (TNF alpha), interleukin 1 beta (IL-1 beta), interleukin 6 (IL-6), or tissue factor genes. In detailed studies on TNF alpha, HIV infection did not affect the regulation of TNF alpha in response to bacterial lipopolysaccharide. In an effort to examine the interferon responsiveness of HIV-infected macrophages, the cells were challenged with vesicular stomatitis virus (VSV) with or without interferon pretreatment. Surprisingly, HIV-infected macrophages were completely resistant to VSV-induced lysis even in the absence of interferon; however, no interferon was detected in the supernatants of these infected cells. The resistance of HIV-infected macrophages to superinfection with VSV indicates a previously undescribed effect of HIV upon macrophage cellular metabolism.
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PMID:Characterization of a macrophage-tropic HIV strain that does not alter macrophage cytokine production yet protects macrophages from superinfection by vesicular stomatitis virus. 217 98

We report a detailed study on oral lesions and their association with the WHO revised provisional case definition of AIDS as well as serologic signs of HIV infection among 186 patients in Dar Es Salaam, Tanzania. The patient material consisted of 39 hospitalized suspected AIDS patients, 44 medical nonsuspected patients, 53 dental outpatients, and 50 patients with sexually transmitted diseases. The male:female ratio was 2.1:1 on average. Oral examination was done without knowledge of the HIV status of the patients. Among 39 suspected AIDS patients 97% had WHO AIDS criteria and 90% were seropositive for HIV. Among the 147 patients not suspected of having AIDS 18 (12%) had AIDS criteria and 15% had serologic evidence of HIV infection. The presence of WHO AIDS criteria correlated significantly with the presence of HIV antibodies, but not with HIV antigen. Oral lesions were found in 54% of those with AIDS criteria and 52% of HIV-infected patients, as compared to 3% and 6% of the patients without AIDS criteria and HIV infection, respectively (p less than 0.01). Among patients with AIDS atrophic candidiasis occurred in 21%, pseudomembranous candidiasis in 23%, hairy leukoplakia in 36%, herpetic stomatitis in 2%, Kaposi's sarcoma in 4%, and nonspecific ulcer in 4%. The presence of oral lesions had a high predictive value for presence of AIDS criteria as well as for presence of HIV infection in this hospital setting. All patients should have a thorough oral examination and the presence of the aforementioned oral lesions should lead to testing for HIV infection.
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PMID:Oral candidiasis and hairy leukoplakia correlate with HIV infection in Tanzania. 218 50

We constructed a recombinant human immunodeficiency virus (HIV) vector to facilitate studies of virus infectivity. A drug resistance gene was inserted into a gp160- HIV proviral genome such that it could be packaged into HIV virions. The HIV genome was rendered replication defective by deletion of sequences encoding gp160 and insertion of a gpt gene with a simian virus 40 promoter at the deletion site. Cotransfection of the envelope-deficient genome with a gp160 expression vector resulted in packaging of the defective HIV-gpt genome into infectious virions. The drug resistance gene was transmitted and expressed upon infection of susceptible cells, enabling their selection in mycophenolic acid. This system provides a quantitative measure of HIV infection, since each successful infection event leads to the growth of a drug-resistant colony. The HIV-gpt virus produced was tropic for CD4+ human cells and was blocked by soluble CD4. In the absence of gp160, noninfectious HIV particles were efficiently produced by cells transfected with the HIV-gpt genome. These particles packaged HIV genomic RNA and migrated to the same density as gp160-containing virions in a sucrose gradient. This demonstrates that HIV virion formation is not dependent on the presence of a viral envelope glycoprotein. Expression of a murine leukemia virus amphotropic envelope gene in cells transfected with HIV-gpt resulted in the production of virus capable of infecting both human and murine cells. These results indicate that HIV can incorporate envelope glycoproteins other than gp160 onto particles and that this can lead to altered host range. Like HIV type 1 and vesicular stomatitis virus(HIV) pseudotypes, gp-160+ HIV-gpt did not infect murine NIH 3T3 cells that bear human CD4, confirming that these cells are blocked at an early stage of HIV infection.
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PMID:Construction and use of a human immunodeficiency virus vector for analysis of virus infectivity. 221 18

Human PBMC from HIV-1-infected individuals produced ex vivo in response to vesicular stomatitis virus only low amounts of IFN-alpha. This impairment was significant as early as Walter Reed (WR) stage 2; at WR stage 4-5, the production was almost zero. At WR stage 2 of infection, IFN-alpha mRNA was exclusively found in association with polyribosomes, indicating that IFN-alpha gene was transcriptionally inactive under the experimental conditions used. A similar decrease of the level of transcripts as a function of the progression of the disease was also observed for the IFN-gamma mRNA. In contrast, TNF-alpha production was strongly enhanced in PBMC from HIV-1-infected individuals after stimulation with LPS compared to the TNF-alpha production of activated PBMC from healthy donors. Almost parallel with the increase of the level of the transcript for TNF-alpha, the level of TNF-beta increases as well. Data are presented which show that the increased TNF-alpha production is due to a longer half-life of TNF-alpha transcripts in PBMC from infected individuals. These results let us suggest that the up-regulation of TNF-alpha gene expression in PBMC from HIV-infected individuals is controlled predominantly on the posttranscriptional level, whereas transcriptional events regulate the level of IFN-alpha transcripts. This assumption is supported by run-on experiments which revealed that the extent of transcription of TNF-alpha gene is almost identical in nuclei from stimulated PBMC of noninfected and HIV-infected donors, whereas the transcription of IFN-alpha gene is strongly suppressed in nuclei from HIV-infected individuals at WR stages 3 and 6.
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PMID:Differential gene expression of IFN-alpha and tumor necrosis factor-alpha in peripheral blood mononuclear cells from patients with AIDS related complex and AIDS. 229 23

This report describes a case of HIV-associated periodontitis complicated by necrotizing stomatitis in a homosexual male patient with AIDS. Necrotizing stomatitis is a rapidly progressive ulcerative and necrotic infection that causes massive destruction of the oral tissues and underlying bone. Like HIV periodontitis, it appears to be related to the immune suppression caused by human immunodeficiency virus (HIV) infection; importantly, it may be life threatening. In this case, initial resolution resulted from local debridement in association with metronidazole therapy. Long-term clinical management consisted of monthly professional prophylaxis, good oral hygiene, and daily rinses with chlorhexidine. This case suggests that progressive oral necrotizing infection should be recognized as one element in the spectrum of oral manifestations of HIV infection.
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PMID:HIV-associated periodontitis complicated by necrotizing stomatitis. 231 60

From January 1988-September 1989, dental practitioners performed a comprehensive oral examination on 83 HIV positive patients at the Department of Infectious Diseases, University Clinic of Internal Medicine in Kinshasa, Zaire for a study on prevalence and clinical aspects of oral lesions associated with HIV infection. Women comprised 55.5% of these AIDS patients. They all had oral lesions: 94% fungal, 33% bacterial, 23% viral, 14% unknown origin, and 12% neoplasms. The majority of these oral lesions developed in 31-40 year olds. Further, the 21-30 year olds were more likely to have bacterial infections, especially aggressive periodontitis. Fungal infections occurred most often on the lips, palate, and tongue, while viral infections occurred mainly on the tongue. Kaposi's sarcoma only afflicted the palate. Pseudomembranous candidiasis was the leading fungal infection (32% of all oral lesions) then atrophic (22.8%) and hyperplastic (6%) types. 17% and 16% of all lesions included these bacterial infections: aggressive periodontitis and necrotizing gingivitis respectively. the leading viral infection was hairy leukoplakia (14%) followed by leukoplakia (8%), and herpetic stomatitis (4%). The unknown lesions included ulcers (12%) and a swollen salivary gland )2%). 12% of the examined AIDS patients, mostly 31-50 year olds, had oral Kaposi's sarcoma. They also had it on other parts of the body. Since HIV prevalence in Zaire ranges between 3-8%, all dentists should be cognizant of oral manifestations of HIV which may indeed be the 1st clinical indications of HIV. They should refer any patients with such lesions to a health facility with AIDS specialists for diagnosis and care.
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PMID:Oral manifestations of AIDS in a heterosexual population in a Zaire hospital. 235 42

The production of neutralizing monoclonal antibodies (MAbs) will permit the exact localization of neutralizing epitopes on the AIDS virus, HIV-1. We describe the properties of seven MAbs to the envelope of the LAV-1 isolate. Five MAbs recognise the central portion of gp110, amino acids 279-472, and four of these are capable of high-titre neutralization of HIV-1, by infection inhibition, syncytial inhibition and vesicular stomatitis virus (VSV) pseudotype neutralization. One of the two MAbs to gp41 inhibits syncytium formation. Neutralization, live cell immunofluorescence and immunoprecipitation of gp110 are type-specific and restricted to HIV-1 isolates closely related to LAV-1.
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PMID:Neutralizing monoclonal antibodies to the AIDS virus. 245 22


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