Comprehensive allelotype study of ovarian tumors of low malignant potential: potential differences in pathways between tumors with and without genetic predisposition to invasive carcinoma
| Autor: | Manabu Fukumoto, Kentaro Nakayama, Kohji Miyazaki, Nobuaki Tamahashi, Satoru Nakayama, Tsuneo Namiki, Takahumi Uchida, Yuji Takebayashi |
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| Rok vydání: | 2001 |
| Předmět: |
Adenoma
Cancer Research medicine.medical_specialty Pathology endocrine system diseases Loss of Heterozygosity Ovary Biology Loss of heterozygosity hemic and lymphatic diseases otorhinolaryngologic diseases Genetic predisposition Carcinoma medicine Humans Genetic Predisposition to Disease Neoplasm Metastasis Allelotype Alleles Ovarian Neoplasms Genome Cytogenetics Microsatellite instability Chromosome Mapping medicine.disease female genital diseases and pregnancy complications stomatognathic diseases Serous fluid medicine.anatomical_structure Oncology Female Gene Deletion Microsatellite Repeats |
| Zdroj: | International journal of cancer. 94(4) |
| ISSN: | 0020-7136 |
| Popis: | Ovarian tumors of low malignant potential (LMP) are intermediate between adenomas and ovarian carcinomas (OC); however, the relevance of LMP to ovarian carcinogenesis is not clear. We performed a comparative analysis of allelotypes in 50 cases of LMP (42 mucinous and 8 serous) and 23 cases of OC (15 mucinous and 8 serous) to investigate any differences in genetic changes. Analysis of loss of heterozygosity (LOH) using 25 microsatellite markers reportedly associated with OC revealed that the total LOH frequency at each marker was significantly lower in LMP than in OC (p < 0.01). However, 9 (36%) loci showed higher LOH frequency in mucinous LMP than in mucinous OC. A genome-wide scan for LOH using 91 microsatellite markers and fine mapping revealed that LOH at D7S1805 (7q35) is characteristic of mucinous LMP (19.4% in mucinous LMP, 8.3% in mucinous OC). We further studied LOH in 3 cases of mucinous OC that were accompanied by mucinous LMP lesions. In 2 cases, LOH frequency was higher in the carcinoma portion than in the morphologically LMP portion. The other case showed microsatellite instability in the morphologically LMP portion and LOH in the carcinoma portion. Our results suggest the presence of an LMP-to-OC developmental sequence and the existence of a subset of LMP that does not develop into OC in the mucinous subtype of ovarian tumors. |
| Databáze: | OpenAIRE |
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