Volume 131, Issue 1 pp. 219-228
Epidemiology

Biomarkers of oxidant load and type-specific clearance of prevalent oncogenic human papillomavirus infection: Markers of immune response?

Erin M. Siegel

Corresponding Author

Erin M. Siegel

Cancer Epidemiology Program, Division of Population Sciences, Moffitt Cancer Center, Tampa, FL

Department of Epidemiology & Biostatistics, College of Public Health, University of South Florida, Tampa, FL

Tel: (813) 745-6533, Fax: (813) 745-6507

Cancer Epidemiology Program, Division of Population Sciences, Moffitt Cancer Center, 12902 Magnolia Dr, Tampa, FL 33612, USASearch for more papers by this author
Nitin Patel

Nitin Patel

James A. Haley Veterans' Hospital, HSR&D/RR&D Research Center of Excellence, Tampa, FL

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Beibei Lu

Beibei Lu

Cancer Epidemiology Program, Division of Population Sciences, Moffitt Cancer Center, Tampa, FL

Department of Epidemiology & Biostatistics, College of Public Health, University of South Florida, Tampa, FL

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Ji-Hyun Lee

Ji-Hyun Lee

Cancer Epidemiology Program, Division of Population Sciences, Moffitt Cancer Center, Tampa, FL

Department of Epidemiology & Biostatistics, College of Public Health, University of South Florida, Tampa, FL

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Alan G. Nyitray

Alan G. Nyitray

Cancer Epidemiology Program, Division of Population Sciences, Moffitt Cancer Center, Tampa, FL

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Neal E. Craft

Neal E. Craft

Craft Technologies, Inc., Wilson, North Carolina

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Krystyna Frenkel

Krystyna Frenkel

Department of Environmental Medicine, NYU School of Medicine, New York City, NY

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Luisa L. Villa

Luisa L. Villa

Ludwig Institute for Cancer Research, São Paulo, Brazil

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Eduardo L. Franco

Eduardo L. Franco

Departments of Oncology and of Epidemiology and Biostatistics, McGill University, Montreal, Canada

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Anna R. Giuliano

Anna R. Giuliano

Cancer Epidemiology Program, Division of Population Sciences, Moffitt Cancer Center, Tampa, FL

Department of Epidemiology & Biostatistics, College of Public Health, University of South Florida, Tampa, FL

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First published: 19 August 2011
Citations: 3

Presented at the 26th International Papillomavirus Conference and Workshop, July, 2010, Montreal, Quebec, Canada, Abstract 648.

Conflict of Interest: A.G.N has received research support from Merck and CO, Inc. L.L.V. is a consultant to and on the Speakers Bureau of Merck and CO, Inc. E.L.F. has served as occasional advisory board member or consultant to companies involved with HPV vaccines (GlaxoSmithKline and Merck and CO, Inc.), HPV diagnostics (Gen-Probe, Roche, Qiagen), or cervical cancer cytology screening (Cytyc, Ikonisys). A.R.G is a consultant to and on the Speakers Bureau of Merck and CO, Inc.

Abstract

Human papillomavirus (HPV) infection is the cause of cervical cancer. Increased production of reactive oxygen species (ROS) maybe the common mechanism through which HPV-cofactors (i.e., smoking and inflammation) influence duration of infections. Biomarkers of total oxidant load may serve as cumulative measures of ROS exposure due to these cofactors. Therefore, we conducted a study evaluating the association between biomarkers of oxidant load and duration of HPV infections, early HPV natural history events. Serum samples were obtained from 444 HPV-positive women in the Ludwig-McGill Cohort Study. Anti-5-hydroxymethyl-2′-deoxyuridine autoantibody (anti-HMdU aAb) and malondialdehyde (MDA) were measured at baseline. Cox-proportional hazard models were used to estimate the probability of clearing any HPV, oncogenic HPV, non-oncogenic HPV and HPV-16 infections. Women with elevated MDA were significantly more likely to clear prevalent oncogenic HPV infections compared to those with lower MDA levels (Adjusted Hazard Ratio (AHR) = 2.7; 95%CI = 1.4-5.1). There did not appear to be an association between elevated MDA and clearance of incident oncogenic HPV infections. Similarly, women with elevated anti-HMdU aAb levels had higher rates of prevalent oncogenic HPV infection clearance (Quartile 3:AHR = 2.2; 95%CI = 1.2-4.4; Quartile 4:AHR = 2.4; 95%CI = 1.2-4.9). Higher levels of oxidant load biomarkers were associated with increased clearance of prevalent HPV infections. However, oxidant load biomarkers measured before incident infections were not associated, suggesting that the elevation of MDA and anti-HMdU aAb may reflect an ongoing effective immune response, such as increased innate immunity. More research focused on the immune responses to HPV and elevated markers of oxidant load is needed.

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