title: Microsatellite instability in primary neoplasms from HIV + patients.
abstract: AIDS is associated with a high risk of certain malignancies, notably Kaposi's sarcoma (KS) and B-cell non-Hodgkin's lymphoma (NHL). The pathogenesis of these malignancies is not fully understood. One mechanism of malignant transformation recently described in colon tumorigenesis results from defects in DNA mismatch repair, manifest as widespread microsatellite instability. We demonstrate a high rate of microsatellite instability in KS and aggressive lymphomas obtained from HIV-infected patients, whereas there is no evidence of instability in similar lesions from HIV-negative patients. Further elucidation of the underlying mechanisms responsible for HIV-associated instability in primary tumours may provide insight into the pathogenesis of these AIDS-related neoplasms.
authors.affiliation: Department of Otolaryngology--Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205-2196, USA.
authors.forename: G C
authors.initials: GC
authors.lastname: Bedi
authors.forename: W H
authors.initials: WH
authors.lastname: Westra
authors.forename: H
authors.initials: H
authors.lastname: Farzadegan
authors.forename: P M
authors.initials: PM
authors.lastname: Pitha
authors.forename: D
authors.initials: D
authors.lastname: Sidransky
mesh_terms: D004260:DNA Repair; D004273:DNA, Neoplasm / Q000235:genetics*; D004279:DNA, Viral / Q000032:analysis; D005819:Genetic Markers; D015658:HIV Infections / Q000235:genetics*; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000235:genetics*; D018895:Microsatellite Repeats; D012514:Sarcoma, Kaposi / Q000235:genetics*
chemical_list: D004273:DNA, Neoplasm; D004279:DNA, Viral; D005819:Genetic Markers