Brain macrophage surface marker expression with HIV-1 infection and drug abuse: a preliminary study
| Autor: | Silvia Delgado, Paul Shapshak, Boanerges Dominguez, Carol K. Petito, Robert K. Fujimura, Pura Rodriguez de la Vega, Renee V. Stewart, David M Segal, Nora C. J. Sun |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Male Pathology medicine.medical_specialty AIDS Dementia Complex Substance-Related Disorders CD14 T cell CD8 Antigens CD1 Lipopolysaccharide Receptors Antigens Differentiation Myelomonocytic Cell Count Pilot Projects Biology Temporal lobe Antigen Antigens CD medicine Humans CD68 Macrophages Infant HLA-DR Antigens Middle Aged Temporal Lobe CD11c Antigen medicine.anatomical_structure Immunology CD4 Antigens HIV-1 Immunohistochemistry Female Neurology (clinical) CD8 Biomarkers |
| Zdroj: | Journal of neuro-AIDS. 2(3) |
| ISSN: | 1069-7438 |
| Popis: | To determine the heterogeneity of surface marker expression of macrophages in the temporal lobe of patients who died with AIDS who were also Drug Abusers (DAs). We studied the expression of macrophage surface markers CD11c, CD14, CD68, and HLA-DR and T cell surface markers CD4, and CD8.The macrophage is the prime locus for HIV-1-associated pathology, is the most frequently infected cell in the brain, and has the highest virus load compared to other cells. We previously described the heterogeneity of macrophage surface marker expression and performed morphometric analysis in peripheral nerves of patients who died from AIDS compared to HIV-1 negative individuals. We showed that the HIV-related neuropathy in AIDS is a multifocal process. It is similarly important to determine the expression of macrophage surface markers in brain. Temporal lobe tissue was selected for this preliminary study because we previously found elevated HIV-1 proviral DNA load and inflammatory processes in this neuroanatomic location for subjects who died with AIDS. There is a high prevalence of Drug Abuse in Miami, Florida, associated with AIDS that may interactively affect HIV-associated pathology.Temporal lobe tissue was examined from 17 HIV-1-seropositive patients (4 with Drug Abuse and 13 without Drug Abuse) and 11 HIV-seronegative individuals (5 with Drug Abuse and 6 without Drug Abuse). Standard immunohistochemistry utilized alkaline phosphatase conjugate secondary antibody and fuchsin substrate.We found that HIV-1 infection and the interaction of HIV-1 infection and Drug Abuse produced changes in macrophage surface marker expression. Macrophage surface markers, CD11c, CD14, CD68, and HLA-DR, and T-cell marker CD4 were increased with statistical significance due to HIV-1 infection (all p.001) whereas CD8 remained unchanged. Changes due to Drug Abuse alone were not significant. Interaction of Drug Abuse and HIV-infected individuals showed increased expression of CD68 (p = .011), HLA-DR (p = .001), CD4 (p = .027), and CD8 (p = .016).Drug Abuse and HIV-1 infection are factors that differentially and interactively result in multiple macrophages surface marker effects. In HIV-1 infected individuals, Drug Abuse stimulates surface marker expression. Since brain macrophage surface makers do not change uniformly as a result of Drug Abuse and HIV infection, these cells may be heterogeneous and contain sub-types (sub-sets). It remains to be determined which macrophage sub-types may be most pathognomic for pathology. |
| Databáze: | OpenAIRE |
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