Loss of heterozygosity on chromosomes 9q and 16p in atypical adenomatous hyperplasia concomitant with adenocarcinoma of the lung

Citation
K. Takamochi et al., Loss of heterozygosity on chromosomes 9q and 16p in atypical adenomatous hyperplasia concomitant with adenocarcinoma of the lung, AM J PATH, 159(5), 2001, pp. 1941-1948
Citations number
32
Categorie Soggetti
Research/Laboratory Medicine & Medical Tecnology","Medical Research Diagnosis & Treatment
Journal title
AMERICAN JOURNAL OF PATHOLOGY
ISSN journal
00029440 → ACNP
Volume
159
Issue
5
Year of publication
2001
Pages
1941 - 1948
Database
ISI
SICI code
0002-9440(200111)159:5<1941:LOHOC9>2.0.ZU;2-3
Abstract
Atypical adenomatous; hyperplasia (AAH) has recently been implicated as a p recursor to lung adenocarcinoma. We previously reported loss of heterozygos ity (LOH) in tuberous sclerosis (TSC) gene-associated regions to frequently be observed in lung adenocarcinoma with multiple AAHs. in this study, we a nalyzed LOH in four microsatellite loci on 9q, including the TSC1 gene-asso ciated region, and four loci on 16p, including the TSC2 gene-associated reg ion, in both 18 AAHs and 17 concomitant lung adenocarcinomas from I I patie nts. Seven of 18 (39%) AAHs and 9 of 17 (53%) adenocarcinomas displayed LOH on 9q. Five (28%) AAHs and seven (41%) adenocarcinomas harbored LOH at loc i adjacent to the TSC1 gene. Four of 18 (22%) AAHs and 6 of 17 (35%) adenoc arcinomas displayed LOH on 16p. One (6%) AAH and five (29%) adenocarcinomas harbored LOH at loci adjacent to the TSC2 gene. These findings may indicat e a causal relationship of LOH on 9q and 16p mi a fraction of AAH lesions a nd adenocarcinomas of the lung. Especially, the frequencies of LOH on 9q an d at the TSC1 gene-associated region were high. The TSC1 gene or another ne ighboring tumor suppressor gene on 9q might be involved in an early stage o f the pathogenesis of lung adenocarcinoma.