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

The authors review the cases of 40 patients with AIDS who died in 1989, in order to establish the relationships between clinical picture, neuroradiological features and neuropathological findings. Neurological involvement was present in over 75% of the patients, with HIV-related encephalopathy and toxoplasmosis as the most frequent diseases (52.5% and 20.0%). With regard to the cases of AIDS dementia complex (ADC) the authors observed a good correlation between the severity of the clinical manifestations, central nervous system atrophy as observed on computed tomography scan and pathological findings. The survival of AIDS patients with ADC was higher when compared to patients without ADC, suggesting the time-relationship of ADC. AS in the case of toxoplasma encephalitis, a strong relationship between radiological and pathological findings was observed. The presence of toxoplasma encephalitis in patients with radiologic features of healed lesions confirms the need for life-long prophylaxis.
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PMID:[AIDS and the central nervous system: correlations between clinical, radiological and anatomo-pathological aspects. A critical review of 40 personal cases]. 166 Jul 20

Experimental and clinical evidence indicates that all lentiviruses of animals and humans are neurotropic and potentially neurovirulent. The prototypic animal lentiviruses, visna virus in sheep and caprine arthritis encephalitis virus in goats have been known for decades to induce neurologic disease. More recently, infection of the brain with the human immunodeficiency virus (HIV) has been linked to an associated encephalopathy and cognitive/motor complex. While the visna virus and caprine arthritis encephalitis virus are important models of neurologic disease they are not optimal for the study of HIV encephalitis because immune deficiency is only a minor component of the disease they induce. By contrast, the recently isolated lentiviruses from monkeys and cats, the simian and feline immunodeficiency viruses (SIV and FIV respectively), are profoundly immunosuppressive as well as neurotropic. SIV infection of the central nervous system of macaques now provides the best animal model for HIV infection of the human brain due to the close evolutionary relationship between monkeys and man, the genetic relatedness of their respective lentiviruses, and the similarities in the neuropathology. This chapter will compare and contrast the neurobiology of SIV and FIV with HIV.
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PMID:Neurobiology of simian and feline immunodeficiency virus infections. 166 9

We measured the serum concentrations of tumor necrosis factor (TNF-alpha), interleukin 1-beta (IL-1-beta), p24 antigen, CD4+/CD8+ cells and immunoglobulins in 35 children at various stages of human immunodeficiency virus infection. Serum TNF-alpha concentrations were significantly higher in children with lymphocytic interstitial pneumonitis and in children with mildly symptomatic illness than in asymptomatic children or children with acquired immunodeficiency syndrome. In addition serum IL-1 concentrations were significantly higher in patients with lymphocytic interstitial pneumonitis than in asymptomatic, mildly symptomatic, or acquired immunodeficiency syndrome patients. Children with lymphocytic interstitial pneumonitis had the highest serum TNF-alpha and IL-1 concentrations. Among symptomatic children serum TNF-alpha concentrations correlated positively with those of IL-1, and both were inversely related to the amount of p24 antigen. TNF-alpha values in excess of 50 pg/ml were observed more frequently among patients with CD4+ cell count greater than 400/mm3 than in those with CD4+ cell count less than 400/mm3. We did not find any association between elevated TNF-alpha concentrations and cachexia, opportunistic infections or progressive encephalopathy.
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PMID:Serum tumor necrosis factor alpha, interleukin 1-beta, p24 antigen concentrations and CD4+ cells at various stages of human immunodeficiency virus 1 infection in children. 167 77

Neuropathological investigations were carried out on 166 autopsies of HIV-seropositive patients, with and without AIDS. Opportunistic infections and lymphomas were present in about 50% of cases; 65 patients were bearers of HIV-encephalopathy. HIV core protein p24 was detected in few mono- and multinucleated macrophages (HIV-cells), only in cases with HIV-encephalopathy. In the CNS of HIV-positive, asymptomatic patients no histological or immunohistochemical abnormalities were seen. These findings let suppose that AIDS-Dementia is a result of a late infiltration of HIV-infected macrophages from the bloodstream into the brain and not due to an impairment of neuronal or glial cells infected by HIV in the early stages of the disease.
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PMID:[The CNS in AIDS and in asymptomatic HIV positive patients]. 172 27

15 autopsy cases of PML in AIDS are presented. Frequent findings were: Very large, confluent PML-lesions (7 cases), lesions with prominent necrotic features (10 cases) and with marked perivascular mononuclear infiltrates (6 cases). In 9 cases additional PML-foci were seen in the cerebellum and/or the brain stem, and in 1 case there was even an exclusive involvement of those structures. Such characteristics regarding severity and topography of PML in AIDS, may be due to additional toxic factors. In 7 cases HIV-encephalopathy with multinucleated macrophages was present.
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PMID:[Progressive multifocal leukoencephalopathy (PML) in AIDS: morphological and topographical characteristics]. 172 29

The calprotectin level in the cerebrospinal fluid (CSF) of 15 HIV positive patients with symptoms from the central nervous system (CNS) was measured. All 5 patients with opportunistic infections had levels above the reference range and all 10 patients with HIV associated encephalopathy had levels within the reference range. Thus, the calprotectin level in CSF can be of diagnostic value in differentiating between HIV associated encephalopathy and opportunistic infection in the HIV positive patient with symptoms from the CNS.
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PMID:Calprotectin in cerebrospinal fluid of the HIV infected: a diagnostic marker of opportunistic central nervous system infection? 181 29

Neurologic abnormalities occur frequently in children with symptomatic HIV-1 infection (class P2) and include cognitive, language and motor deficits, as well as acquired microcephaly. Neurologic abnormalities can be seen as early as the first 3 months of age and can precede signs of immune deficiency and systemic illness. Hypotonia, delayed or poor head control and decreased vocalizations are some of the early neurologic manifestations of HIV-1 infection. In the majority of cases CNS impairment appears to be related to HIV-1 brain infection although at this time the exact timing of CNS invasion by the virus and the pathogenesis of CNS dysfunction are unknown. Treatment with antiretroviral agents can at least temporarily improve neurologic functioning in some children with HIV-1-related encephalopathy.
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PMID:Neurologic complications of HIV infection in children. 181 29

A 18 year-old soldier, heroin-addict, presented with the association of myasthenia gravis and HIV infection with a specific subacute encephalopathy. To our knowledge, it is the second reported case. This association may result from an immune dysregulation due to nonspecific thymic modifications, which has been reported in AIDS.
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PMID:[AIDS and myasthenia: an uncommon association]. 185 36

Progressive dementia has been described in AIDS patients as the most significant neurologic complication, related to HIV-1 infection directly rather than to opportunistic infections. As the virus seems to enter brain early in the course of infection, incipient dementia or subclinical cognitive impairment have been assumed to occur in otherwise asymptomatic HIV-1 seropositive individuals. A review of relevant neuropsychological studies indicates that this suspicion receives no support in large well-controlled studies. The natural history of AIDS dementia is still not clearly delineated, but encephalopathy seems to develop only with or after systemic immunosuppression.
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PMID:[HIV infection and the development of dementia]. 186 63

The neurological findings in 41 HIV-seropositive children are described. 23 children were symptomatic, eight seropositive but without symptoms and 10 seropositive children less than 15 months of age had no other evidence of immunodeficiency. Acquired microcephaly, developmental regression and progressive motor deterioration indicated HIV encephalopathy, as did developmental delay, mental retardation, cerebellar symptoms and behavioural changes. Three children with progressive encephalopathy improved after treatment with azidothymidine (AZT). In eight children treated with prophylactic intravenous immunoglobulin therapy (IVIG) and seven treated with both IVIG and AZT, no mental deterioration has been observed since the beginning of therapy. One child with advanced encephalopathy and severe pyramidal tract involvement did not improve.
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PMID:Central nervous system involvement of children with HIV infection. 186 79


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