Journal
HIV MEDICINE
Volume 14, Issue 6, Pages 354-361Publisher
WILEY
DOI: 10.1111/hiv.12015
Keywords
HIV infection; hypertension; lipopolysaccharide; nadir CD4 cell count; soluble CD14
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Funding
- Signe and Albert Bergsmarken's fund for investigation of kidney diseases
- HIV fund of the Department of Infectious Diseases at Oslo University Hospital, Ulleval
- South-Eastern Norway Regional Health Authority
- Novo Nordisk Foundation
- Novo Nordisk Fonden [NNF10OC1013203] Funding Source: researchfish
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Objectives The aim of the study was to test the hypothesis that microbial translocation, quantified by levels of lipopolysaccharide (LPS) and subsequent monocyte activation [soluble (sCD14)], is associated with hypertension in HIV-infected individuals. Methods In this exploratory substudy, 42 patients were recruited from a larger, longitudinal HIV-infected cohort study on blood pressure. LPS and sCD14 levels were measured retrospectively at the time of nadir CD4 cell count, selecting untreated HIV-infected patients with both advanced immunodeficiency and preserved immunocompetence at the time of nadir. Patients with later sustained hypertension (n=16) or normotension (n=26) throughout the study were identified. LPS was analysed using the Limulus Amebocyte Lysate colorimetric assay (Lonza, Walkersville, MD) and sCD14 using an enzyme-linked immunosorbent assay (ELISA). Nonparametric statistical tests were applied. Results In the HIV-infected patients [median (interquartile range) age 42 (32-46) years; 79% male and 81% Caucasian], LPS and sCD14 levels were both negatively correlated with nadir CD4 cell count. Plasma levels of LPS (P<0.001) and sCD14 (P=0.024) were elevated in patients with later hypertension compared with patients with normotension. There was a stepwise increase in the number of patients with hypertension across tertiles of LPS (P=0.001) and sCD14 (P=0.007). Both LPS and sCD14 were independent predictors of elevated blood pressure after adjustment for age and gender. For each 10-unit increase in LPS (range 66-272pg/ml), the increment in mean blood pressure in the first period of blood pressure recording was 0.86 (95% confidence interval 0.31-1.41) mmHg (P=0.003). Conclusions As LPS and sCD14 were both independently associated with elevated blood pressure, microbial translocation may be linked to the development of hypertension.
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