TY - JOUR
T1 - CDKN2A copy number loss is an independent prognostic factor in HPV-negative head and neck squamous cell carcinoma
AU - Chen, William S.
AU - Bindra, Ranjit S.
AU - Mo, Allen
AU - Hayman, Thomas
AU - Husain, Zain
AU - Contessa, Joseph N.
AU - Gaffney, Stephen G.
AU - Townsend, Jeffrey P.
AU - Yu, James B.
N1 - Publisher Copyright:
© 2018 Chen, Bindra, Mo, Hayman, Husain, Contessa, Gaffney, Townsend and Yu.
PY - 2018/4/4
Y1 - 2018/4/4
N2 - Background: HPV infection is associated with high p16 expression and good prognosis in head and neck squamous cell carcinomas (HNSCCs). Analysis of CDKN2A, the gene encoding p16, may further elucidate the association between p16 expression and prognosis. We sought to determine whether CDKN2A copy number loss was associated with poor survival in HPV-negative HNSCCs. Methods: The Cancer Genome Atlas HNSCC clinical and genomic data were obtained and integrated. Patients < 80 years old with a primary tumor in the oral cavity, oropharynx, hypopharynx, or larynx were included. Stratifying by copy number loss status, CDKN2A mRNA and p16 protein expression levels were examined and overall survival (OS) and disease-free survival (DFS) were evaluated. Results: 401 patients with HPV-negative HNSCC were identified. 146 patients demonstrated CDKN2A copy number loss. The CDKN2A copy number loss group expressed significantly lower levels of CDKN2A mRNA and p16 protein than did the non-copy number loss group. Median OS for patients with and without CDKN2A copy number loss was 16.5 and 46.6 months, respectively (p = 0.007). Median DFS for both groups was 11.6 and 19.2 months, respectively (p = 0.03). In both univariate and multivariable analyses, stage IV designation, receipt of chemotherapy and CDKN2A copy number loss were predictive of OS. Conclusion: CDKN2A copy number loss predicted poor survival independently of other patient and treatment factors and may be a clinically useful prognostic factor.
AB - Background: HPV infection is associated with high p16 expression and good prognosis in head and neck squamous cell carcinomas (HNSCCs). Analysis of CDKN2A, the gene encoding p16, may further elucidate the association between p16 expression and prognosis. We sought to determine whether CDKN2A copy number loss was associated with poor survival in HPV-negative HNSCCs. Methods: The Cancer Genome Atlas HNSCC clinical and genomic data were obtained and integrated. Patients < 80 years old with a primary tumor in the oral cavity, oropharynx, hypopharynx, or larynx were included. Stratifying by copy number loss status, CDKN2A mRNA and p16 protein expression levels were examined and overall survival (OS) and disease-free survival (DFS) were evaluated. Results: 401 patients with HPV-negative HNSCC were identified. 146 patients demonstrated CDKN2A copy number loss. The CDKN2A copy number loss group expressed significantly lower levels of CDKN2A mRNA and p16 protein than did the non-copy number loss group. Median OS for patients with and without CDKN2A copy number loss was 16.5 and 46.6 months, respectively (p = 0.007). Median DFS for both groups was 11.6 and 19.2 months, respectively (p = 0.03). In both univariate and multivariable analyses, stage IV designation, receipt of chemotherapy and CDKN2A copy number loss were predictive of OS. Conclusion: CDKN2A copy number loss predicted poor survival independently of other patient and treatment factors and may be a clinically useful prognostic factor.
KW - CDKN2A
KW - Genomics and genetics
KW - Head and neck neoplasms
KW - Outcomes assessment
KW - Prognostic biomarkers
UR - http://www.scopus.com/inward/record.url?scp=85044995862&partnerID=8YFLogxK
U2 - 10.3389/fonc.2018.00095
DO - 10.3389/fonc.2018.00095
M3 - Article
AN - SCOPUS:85044995862
SN - 2234-943X
VL - 8
JO - Frontiers in Oncology
JF - Frontiers in Oncology
IS - APR
M1 - 95
ER -