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Persistent oral human papillomavirus infection is associated with smoking and elevated salivary immunoglobulin G

Anna Haukioja¹, Maribel Asunta¹, Eva Söderling¹

¹Department of Oral Pathology and Oral Radiology, Institute of Dentistry and MediCity Research Laboratory, University of Turku, Turku, Finland.

Journal of Clinical Virology : the Official Publication of the Pan American Society for Clinical Virology

|July 12, 2014

Abstract

Background:

Prevalence and risk factors for human papillomavirus (HPV) persistence in oral mucosa are largely unknown. Furthermore, the antiviral effects of saliva in the outcome of oral HPV infections are unexplored.

Objectives:

To compare the levels of selected salivary defence proteins in women with a persistent oral HPV infection and in those without any signs of oral HPV. Lifestyle factors including the use of oral contraceptives, oral sex, smoking and alcohol drinking habits were also assessed.

Study Design:

This nested case-control study of the Finnish Family HPV Study included 60 women with a persistent oral HPV infection and 117 women who remained HPV DNA negative throughout a 6-year follow-up. Whole saliva samples and oral scrapings for HPV testing were collected at the same visit. The oral HPV status was related to salivary concentrations of lactoferrin, lysozyme, IgA, IgG, total protein and sodium as well as to the use of oral contraceptives, oral sex, smoking and alcohol drinking habits.

Results:

Women with a persistent oral HPV infection had higher salivary levels of IgG (p=0.007) and lysozyme (p=0.002, when adjusted to the total protein concentration), than those without an HPV infection. Lactoferrin and IgA concentrations were not related to the HPV-status. Smoking increased the risk of a persistent oral HPV infection (p=0.020), but the oral HPV status was not related to other life-style factors studied.

Conclusions:

Smoking is a risk factor for a persistent oral HPV infection. Oral HPV infection may be associated with increased concentrations of salivary IgG and lysozyme.

Keywords:

Human papillomavirus (HPV)Immunoglobulin Lactoferrin Lysozyme Saliva Women

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