Defects in the Fanconi Anemia Pathway and Chromatid Cohesion in Head and Neck Cancer.
نویسندگان
چکیده
Failure to repair DNA damage or defective sister chromatid cohesion, a process essential for correct chromosome segregation, can be causative of chromosomal instability (CIN), which is a hallmark of many types of cancers. We investigated how frequent this occurs in head and neck squamous cell carcinoma (HNSCC) and whether specific mechanisms or genes could be linked to these phenotypes. The genomic instability syndrome Fanconi anemia is caused by mutations in any of at least 16 genes regulating DNA interstrand crosslink (ICL) repair. Since patients with Fanconi anemia have a high risk to develop HNSCC, we investigated whether and to which extent Fanconi anemia pathway inactivation underlies CIN in HNSCC of non-Fanconi anemia individuals. We observed ICL-induced chromosomal breakage in 9 of 17 (53%) HNSCC cell lines derived from patients without Fanconi anemia. In addition, defective sister chromatid cohesion was observed in five HNSCC cell lines. Inactivation of FANCM was responsible for chromosomal breakage in one cell line, whereas in two other cell lines, somatic mutations in PDS5A or STAG2 resulted in inadequate sister chromatid cohesion. In addition, FANCF methylation was found in one cell line by screening an additional panel of 39 HNSCC cell lines. Our data demonstrate that CIN in terms of ICL-induced chromosomal breakage and defective chromatid cohesion is frequently observed in HNSCC. Inactivation of known Fanconi anemia and chromatid cohesion genes does explain CIN in the minority of cases. These findings point to phenotypes that may be highly relevant in treatment response of HNSCC.
منابع مشابه
Fanconi Anemia: A Signal Transduction and DNA Repair Pathway
Fanconi anemia (FA) is a fascinating, rare genetic disorder marked by congenital defects, bone marrow failure, and cancer susceptibility. Research in recent years has led to the elucidation of FA as a DNA repair disorder and involved multiple pathways as well as having wide applicability to common cancers, including breast, ovarian, and head and neck. This review will describe the clinical aspe...
متن کاملFanconi anemia (FA)-associated proteins FANCF and FANCD2 are important components of the FA pathway of DNA crosslink repair. FANCF and FANCD2 have been found to be involved in drug-resistant multiple myeloma, ovarian cancer, non-small-cell lung cancer, and head and neck
The Fanconi anemia (FA)-associated proteins FANCF and FANCD2 are important components of the FA pathway of DNA crosslink repair. FANCF and FANCD2 have been found to be involved in drug-resistant multiple myeloma, ovarian cancer, non-small-cell lung cancer, and head and neck cancer. However, it is unclear whether these two genes participate in adriamycin (ADR)-resistant leukemia. Therefore, the ...
متن کاملDeficiencies in the Fanconi anemia DNA damage response pathway increase sensitivity to HPV-associated head and neck cancer.
Patients with the rare genetic disease, Fanconi anemia (FA), are highly susceptible to squamous cell carcinomas arising at multiple anatomic sites including the head and neck region. Human papillomaviruses (HPVs), particularly HPV16, are associated with ∼20% of head and neck squamous cell carcinomas (HNSCCs) in the general population. Some but not other investigators have reported that HNSCCs i...
متن کاملEnhanced Frequency of Sister Chromatid Exchanges Induced by Diepoxybutane Is Specific Characteristic of Fanconi Anemia Cellular Phenotype
متن کامل
A genome - wide siRNA screen identi ies the FA / BRCA pathway as the strongest predictor of cisplatin response in head and neck cancer cells
A genome-wide siRNA screen identiiies the FA/BRCA pathway as the strongest predictor of cisplatin response in head and neck cancer cells. ABSTRACT Objective: Patients with advanced head and neck squamous cell carcinoma (HNSCC) are generally treated with cisplatin-containing chemoradiation protocols. Although cisplatin is a low-priced and often used addition to radiation, it causes severe toxici...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Cancer research
دوره 75 17 شماره
صفحات -
تاریخ انتشار 2015