Frequent deletion of ING2 locus at 4q35.1 associates with advanced tumor stage in head and neck squamous cell carcinoma
| Autor: | Mahmoud A L Sheikh Ali, Hitoshi Nagatsuka, Silvia Susana Borkosky, Mehmet Gunduz, Levent Bekir Beder, Mehmet Zeynel Cilek, Esra Gunduz, Susumu Tominaga, Kenji Shimizu, Noboru Yamanaka, Noriyuki Nagai, Andrea Paola Rodriguez |
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| Rok vydání: | 2008 |
| Předmět: |
Male
Cancer Research medicine.medical_specialty Pathology Tumor suppressor gene Loss of Heterozygosity Receptors Cytoplasmic and Nuclear Locus (genetics) Biology Loss of heterozygosity Internal medicine Tumor stage medicine Humans Genes Tumor Suppressor Survivors neoplasms Aged Neoplasm Staging Homeodomain Proteins Hematology Tumor Suppressor Proteins Head and neck cancer Chromosome Mapping Cancer General Medicine Middle Aged Genes p53 medicine.disease Survival Analysis Head and neck squamous-cell carcinoma stomatognathic diseases Oncology Head and Neck Neoplasms Mutation Carcinoma Squamous Cell Cancer research Female Chromosomes Human Pair 4 Gene Deletion Microsatellite Repeats |
| Zdroj: | Journal of Cancer Research and Clinical Oncology. 135:703-713 |
| ISSN: | 1432-1335 0171-5216 |
| Popis: | Loss of heterozygosity (LOH) in the ING family members has been shown in head and neck squamous cell carcinoma (HNSCC) except for ING2. Like all the other members of ING family, ING2, which is located at chromosome 4q35.1, is a promising tumor suppressor gene (TSG). In this study, we performed LOH analysis of ING2 in HNSCC and compared it with clinicopathological variables.We performed LOH analysis in DNAs from 80 paired of normal and HNSCC tissues, using a specifically designed microsatellite marker on chromosome 4q35.1, which detects allelic loss of ING2. TP53 mutation analysis and its relationship with ING2 chromosomal deletion were also performed in available 68 of the samples. The correlation between LOH status and clinicopathological characteristics was evaluated by using statistical methods. The overall survival (OS) and disease free survival (DFS) were also determined.LOH was detected in 54.6% (30/55) of the informative samples. Statistical significance was obtained between LOH and tumor (T) stage (P = 0.02), application of radiotherapy and chemotherapy. Positive node status (N) appeared to be the only independent prognostic factor for both OS (P = 0.031) and DFS (P = 0.044).Our study showed allelic loss of 4q35.1 in HNSCC. The high percentage of LOH suggests ING2 as a candidate TSG in HNSCC. High LOH frequency was statistically associated with advanced T stage, suggesting that ING2 LOH might occur in late stages during HNSCC progression. |
| Databáze: | OpenAIRE |
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