title: CD8 T-cell responses in incident and prevalent human papillomavirus types 16 and 18 infections.
abstract: CD8 T-cell responses were examined in subjects with incident (new following negative visits) or prevalent (lasting ≥ 4 months) human papillomavirus type 16 (HPV16) or human papillomavirus (HPV18) infection. The groups were chosen from a cohort of women being followed every 4 months with cervical cytology and HPV-DNA testing. Enzyme-linked immunospot (ELISPOT) assay was performed at enrollment (time zero) and one year later. At time zero, 1 (6%) of 17 subjects with incident HPV 16/18 infections had positive ELISPOT results which increased to 6 (35%) at one year. For the subjects with prevalent HPV 16/18 infections, the ELISPOT results were similar at time zero (2 (15%) of 15 subjects positive) and at one year (3 (20%)). While all of the 11 women with prevalent HPV16 infection showed clearance one year later, unexpectedly only 1 (25%) of 4 women with prevalent HPV18 infection demonstrated clearance one year later (P = .009).
authors.affiliation: Department of Pathology, College of Medicine, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 502, Little Rock, AR 72205, USA.
authors.forename: Hannah N
authors.initials: HN
authors.lastname: Coleman
authors.forename: Anna-Barbara
authors.initials: AB
authors.lastname: Moscicki
authors.forename: Sepideh N
authors.initials: SN
authors.lastname: Farhat
authors.forename: Sushil K
authors.initials: SK
authors.lastname: Gupta
authors.forename: Xuelian
authors.initials: X
authors.lastname: Wang
authors.forename: Mayumi
authors.initials: M
authors.lastname: Nakagawa