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Cytomegalovirus-specific CD8+ T-cell responses are associated with arterial blood pressure in people living with HIV


Autoři: Vibe Ballegaard aff001;  Karin Kaereby Pedersen aff001;  Peter Brændstrup aff002;  Nikolai Kirkby aff005;  Anette Stryhn aff003;  Lars P. Ryder aff002;  Jan Gerstoft aff001;  Susanne Dam Nielsen aff001
Působiště autorů: Department of Infectious Diseases, Viro-immunology Research Unit, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark aff001;  Department of Clinical Immunology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark aff002;  Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark aff003;  Department of Hematology, Herlev University Hospital, Herlev, Denmark aff004;  Department of Medical Microbiology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark aff005
Vyšlo v časopise: PLoS ONE 15(1)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0226182

Souhrn

People living with HIV (PLHIV) are at increased risk for cardiovascular disease (CVD), and immunity against cytomegalovirus (CMV) may be a contributing factor. We hypothesized that enhanced T-cell responses against CMV and CMV-IgG antibody-levels are associated with higher arterial blood pressure in PLHIV. We assessed serum CMV-IgG, systolic- (SBP) and diastolic- (DBP) blood pressure, pulse pressure (PP), traditional risk factors, activated CD8+ T-cells (CD38+HLA-DR+), senescent CD8+ T-cells (CD28-CD57+) and interleukin-6 (IL-6) in 60 PLHIV and 31 HIV-uninfected controls matched on age, gender, education and comorbidity. In PLHIV, expression of interleukin-2, tumor necrosis factor-α and interferon-γ was measured by intracellular-cytokine-staining after stimulation of T-cells with CMV-pp65 and CMV-gB. Associations between CMV-specific immune responses and hypertension, SBP, DBP or PP were assessed by multivariate logistic and linear regression models adjusted for appropriate confounders. The median age of PLHIV was 47 years and 90% were male. Prevalence of hypertension in PLHIV was 37% compared to 55% of HIV-uninfected controls. CMV-specific CD8+ T-cell responses were independently associated with higher PP (CMV-pp65; β = 2.29, p = 0.001, CMV-gB; β = 2.42, p = 0.001) in PLHIV. No significant differences were found with regard to individual measures of SBP and DBP. A possible weak association was found between CMV-IgG and hypertension (β = 1.33, p = 0.049) after adjustment for age, smoking and LDL-cholesterol. HIV-related factors, IL-6, CD8+ T-cell activation or CD8+ T-cell senescence did not mediate the associations, and no associations were found between CMV-specific CD4+ T-cell responses and blood pressure in PLHIV. In conclusion, increased arterial blood pressure in PLHIV may be affected by heightened CMV-specific CD8+ T-cell responses.

Klíčová slova:

Blood pressure – Cytotoxic T cells – HIV – Human cytomegalovirus – Hypertension – Immune response – Systolic pressure – T cells


Zdroje

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