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Clinical Microbiology Reviews, 10 1995, 549-556, Vol 8, No. 4
C Jones
In many ways, cervical cancer behaves as a sexually transmitted disease.
The major risk factors are multiple sexual partners and early onset of
sexual activity. Although high-risk types of human papillomaviruses (HPV)
play an important role in the development of nearly all cases of cervical
cancer, other sexually transmitted infectious agents may be cofactors.
Herpes simplex virus type 2 (HSV-2) is transmitted primarily by sexual
contact and therefore has been implicated as a risk factor. Several
independent studies suggest that HSV-2 infections correlate with a higher
than normal incidence of cervical cancer. In contrast, other
epidemiological studies have concluded that infection with HSV-2 is not a
major risk factor. Two separate transforming domains have been identified
within the HSV-2 genome, but continued viral gene expression apparently is
not necessary for neoplastic transformation. HSV infections lead to
unscheduled cellular DNA synthesis, chromosomal amplifications, and
mutations. These observations suggest that HSV-2 is not a typical DNA tumor
virus. It is hypothesized that persistent or abortive infections induce
permanent genetic alterations that interfere with differentiation of
cervical epithelium and subsequently induce abnormal proliferation. Thus,
HSV-2 may be a cofactor in some but not all cases of cervical cancer.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Cervical cancer: is herpes simplex virus type II a cofactor?
Department of Veterinary and Biomedical Sciences, University of Nebraska, Lincoln 68583, USA.
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