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Iron Deficiency is Prevalent among HIV-Infected Kenyan Adults and is Better Measured by Soluble Transferrin Receptor than Ferritin

Anne E. P. FroschDivision of Infectious Diseases and International Medicine, Department of Medicine, University of Minnesota, Minneapolis, Minnesota;

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George AyodoKenyan Medical Research Institute, Kisumu, Kenya;
Department of Public Health, Jaramogi Oginga Odinga University of Science and Technology, Bondo, Kenya;

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Eliud O. OdhiamboKenyan Medical Research Institute, Kisumu, Kenya;

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Kathleen IrelandDivision of Infectious Diseases and International Medicine, Department of Medicine, University of Minnesota, Minneapolis, Minnesota;
University of Minnesota Medical School, Academic Health Center, University of Minnesota, Minneapolis, Minnesota;

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John VululeKenyan Medical Research Institute, Kisumu, Kenya;

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Sarah E. CusickDivision of Global Pediatrics, Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota

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Iron deficiency (ID) and human immunodeficiency virus (HIV) infection frequently coexist. Little data exist on ID in HIV-infected individuals, partly because the iron marker ferritin is altered by inflammation common in HIV infection. We measured iron biomarkers (ferritin, soluble transferrin receptor [sTfR], hepcidin) and red cell indices (hemoglobin, mean corpuscular volume [MCV]) in newly diagnosed, antiretroviral therapy-naive, HIV-infected (N = 138) and uninfected (N = 52) Kenyan adults enrolled in a study of the immune response to malaria. We compared markers between infected and uninfected groups with t test and Wilcoxon Rank–Sum, used Spearman correlation to determine the association between iron and inflammatory markers, and applied logistic regression to determine which markers best predicted anemia. HIV-infected individuals had lower hemoglobin (P < 0.001), lower MCV (P < 0.001), higher sTfR (P = 0.003), and a greater prevalence of ID (sTfR > 8.3 mg/L) than uninfected individuals. Ferritin was elevated in HIV-infected individuals and was more strongly correlated with C-reactive protein (ρ = 0.43, P < 0.001) and hepcidin (ρ = 0.69, P < 0.001) than with hemoglobin. The best predictor of anemia in HIV-infected participants was sTfR, with a one log-unit increase in sTfR associated with a 6-fold increase in the odds of anemia (odds ratio = 6.3, 95% confidence interval: 1.8–21.8). These data suggest a significant burden of ID among treatment-naive HIV-infected Kenyan adults. Soluble transferrin receptor may be a reliable marker of ID in HIV-mediated inflammation.

Author Notes

Address correspondence to Anne E. P. Frosch, 701 Park Ave, Minneapolis, MN 55415. E-mail: park0587@umn.edu

Deceased.

Financial support: Research reported in this publication was supported by the University of Minnesota Developmental Center for AIDS Research Grant, the American Society of Tropical Medicine and Hygiene Centennial Award, the National Center for Advancing Translational Sciences of the National Institutes of Health Award Number UL1TR000114, and the National Institute of Allergy and Infectious Diseases Award Numbers 2T32AI055433-06A1 and F32 AI109808-01.

Authors’ addresses: Anne E. P. Frosch, Division of Infectious Diseases and International Medicine, Department of Medicine, University of Minnesota, Minneapolis, MN, E-mail: park0587@umn.edu. George Ayodo, Kenyan Medical Research Institute, Kisumu, Kenya, and Department of Public Health, Jaramogi Oginga Odinga University of Science and Technology, Bondo, Kenya, E-mail: gayodo@gmail.com. Eliud O. Odhiambo, Kenyan Medical Research Institute, Kisumu, Kenya, E-mail: eliudonyango@gmail.com. Kathleen Ireland, University of Minnesota Medical School, Academic Health Center, University of Minnesota, Minneapolis, MN, E-mail: irela033@umn.edu. Sarah E. Cusick, Division of Global Pediatrics, Department of Pediatrics, University of Minnesota, Minneapolis, MN, E-mail: scusick@umn.edu.

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