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- W2015692694 abstract "Objective. Loss of heterozygosity (LOH) profiles and X chromosome inactivation patterns are analyzed in 42 patients with cervical intraepithelial neoplasias (CIN), including low-grade (CIN1) and high-grade (CIN2, CIN3) lesions, and 22 patients with invasive cervical carcinomas. Method. Laser capture microdissection was utilized to procure pure matched normal and lesional cells from each case. Sixteen microsatellite markers on four chromosomal arms, 6q21–q25.1, 8p21, 13q12.3–q13, and 17q12–q21, were amplified for LOH, as well as the HUMARA locus for X chromosome inactivation analysis. Eight additional markers spanning the long arm of chromosome 6 were utilized in all cases showing LOH on this arm and in which further tissue material was available for microdissection. Results. Fifty-five percent of carcinomas showed deletions on chromosome bands 6q21–q25.1, 43% on 13q12.3–q13, and 40% on 17q12–q21. Deletions on 6q were identified in CIN3 (40%), CIN2 (37%), and CIN1 (10%), on 13q in CIN3 (33%) and CIN2 (33%), and rarely on chromosomal arm 17q. Finer 6q mapping revealed that marker D6S310 (q22) represented the centromeric and marker D6S255 (q25–q16) the telomeric boundary of deletion. A second, telomeric area of deletion at marker D6S281 (q27) was also identified. Monoclonal X chromosome inactivation patterns were identified in 12/13 cancers, 13/14 CIN3, 5/10 CIN2, and 0/6 CIN1. Conclusions. Two areas of deletion on chromosome 6q were identified in cervical tumors, suggesting the presence of tumor suppressor gene(s) inactivated in this neoplasia. LOH on this arm were identified early during cervical tumor progression. LOH on 13q and 17q also occur in cervical cancers. X chromosome inactivation patterns suggest that CIN develops into a monoclonal lesion during progression from CIN1 to CIN3." @default.
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- W2015692694 date "2001-03-01" @default.
- W2015692694 modified "2023-10-15" @default.
- W2015692694 title "Allelic Deletion Mapping on Chromosome 6q and X Chromosome Inactivation Clonality Patterns in Cervical Intraepithelial Neoplasia and Invasive Carcinoma" @default.
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- W2015692694 doi "https://doi.org/10.1006/gyno.2000.6087" @default.
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