Loss of Heterozygosity on Chromosome 15q15 Near Thrombospondin-1 Gene in Breast Carcinomas

• Published in: Journal of pathology and translational medicine pp. 221 - 230
• Main Authors: 김진아, 김경미, 이경지, 이안희, 강석진, 이교영, 이희정, 유문간
• Format: Journal Article
• Language: English
• Published: 대한병리학회 01.06.2009
• Subjects: 병리학
• ISSN: 2383-7837; 2383-7845

Background : Chromosome 15q15 near the thrombospondin-1 (THBS-1) gene may be associated with tumor progression and metastasis. To clarify the potential role of the15q15 region in progression of breast carcinoma, we investigated the loss of heterozygosity (LOH) and the microsatellite instability (MSI) status of chromosome 15q15. Methods : LOH and MSI were detected in 84 breast carcinoma specimens using PCR-based microsatellite analysis with three microsatellite markers. Results : Of 77 breast carcinomas containing the heterozygous alleles, 25 (32%) showed LOH in at least one microsatellite marker. Partial LOH and total LOH were detected in 14 (18.27%) and 11 (14.3%) cases. The total LOH were inversely correlated with node metastasis. A single LOH at D15S514 was inversely correlated with nuclear grade and a single LOH at the D15S129 allele was associated with increased expression of the THBS- 1 gene. MSI-positive breast carcinomas detected in 14 (17%) cases showed no correlation with any clinicopathologic feature. Conclusions : These results indicate that loss of the chromosome 15q15 region delays the progression of breast carcinoma because the magnitude of LOH is large and involves the THBS-1 gene and additional genetic elements. The genes located on chromosome 15q15 probably play a tissue-type-dependent role in malignant growth of the tumor. KCI Citation Count: 0