HIV-1-infected long-term non-progressors have milder mitochondrial impairment and lower mitochondrially-driven apoptosis in peripheral blood mononuclear cells than typical progressors
| Autor: | Joan Villarroya, Miguel López-Dupla, Angels Fontanet, Marta Giralt, Esteban Martínez, Josep M. Gatell, Sònia López, Joaquim Peraire, Maria Saumoy, Maija Holmstrom, Francesc Villarroya, Elisabet Deig, M. Antonia Sambeat, Enric Pedrol, Matilde R. Chacon, Francesc Vidal, Glòria Garrabou, Pere Domingo, Òscar Miró |
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| Rok vydání: | 2007 |
| Předmět: |
Adult
Male Mitochondrial DNA Immunoblotting Caspase 3 Apoptosis HIV Infections Mitochondrion Biology Peripheral blood mononuclear cell Asymptomatic DNA Mitochondrial Polymerase Chain Reaction HIV Long-Term Survivors Electron Transport Complex IV Electron Transport Complex III Virology medicine Humans Fluorometry Cells Cultured Electron Transport Complex II Middle Aged Molecular biology Caspase 9 Mitochondria Infectious Diseases Mitochondrial respiratory chain Proto-Oncogene Proteins c-bcl-2 Spectrophotometry Coenzyme Q – cytochrome c reductase Immunology HIV-1 Leukocytes Mononuclear Female medicine.symptom |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1873-4251 |
| Popis: | Mitochondrial parameters in peripheral blood mononuclear cells (PBMC) and their relationship with mitochondrially- driven PBMC apoptosis were investigated in a group of HIV-1-infected long-term nonprogressors (LTNP) and compared with untreated asymptomatic HIV-1 infected typical progressors (TP) and uninfected healthy controls (HC). Twenty-six LTNP, 27 TP and 31 HC were evaluated. Studies were performed in PBMCs. Mitochondrial DNA content (mtDNA) was assessed by quantitative real-time PCR. Activities of mitochondrial respiratory chain complexes (MRC) II, III and IV were determined by spectrophotometry. Caspase-3 activity was assessed by fluorimetry, and caspase-9 activation and Bcl-2 levels were assessed by immunoblotting. mtDNA abundance (p < 0.05), MRC complex II (p < 0.001), complex III (p < 0.01) and complex IV (p=0.01) were lower in the TP group than in the HC group. In the LTNP group these parameters were similar to those of the HC group except for complex II, which was decreased (p < 0.01). The PBMC of TP showed the highest overall apoptotic activation, since their caspase-3 activity was greater than that of HC (p < 0.05) and LTNP. In the case of LTNP, however, the difference was non-significant. Caspase-9 and the caspase-9/Bcl-2 ratio were both over-expressed in TP compared to HC (p < 0.01) and LTNP (p < 0.05). Both of these measurements indicate that mitochondrially- driven apoptosis in TP is greater than in LTNP and HC. A relationship between mitochondrial damage and apoptotic activation was found in TP. Mitochondrial damage is associated with increased PBMC apoptosis in patients with active HIV-1 replication (TP). These abnormalities are slight or not present in LTNP. |
| Databáze: | OpenAIRE |
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