期刊
OTOLARYNGOLOGY-HEAD AND NECK SURGERY
卷 149, 期 2, 页码 252-260出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0194599813486599
关键词
head and neck cancer; HPV; cancer stem cells; ALDH; chemotherapy
资金
- University of Michigan Comprehensive Cancer Center
- American Academy of Otolaryngology-Head and Neck Surgery Percy Memorial Award
- Kirschstein National Research Service Award (NRSA) in Advanced Research Training in Otolaryngology [5 T32 DC005356]
- NIDCR [1 R01-DE019126]
- NCI [P50 CA97248, P30 CA46592]
- NIDCD [P30 DC05188]
Objectives. To determine if the behavior of cancer stem cells (CSCs) is affected by human papillomavirus (HPV) status. Study Design. An in vitro and in vivo analysis of HPV and CSCs. Setting. University laboratory. Subjects and Methods. We isolated CSCs from HPV-positive and HPV-negative cell lines. Two HPV-negative cell lines underwent lentiviral transduction of E6/E7. Chemoresistence was determined using colony formation assays. Native HPV-positive and HPV E6/E7-transduced cells were compared for lung colonization after tail vein injection in NOD/SCID mice. Results. The proportion of CSC is not significantly different in HPV-positive or HPV-negative head and neck squamous cell carcinoma (HNSCC) cell lines. The HNSCC CSCs are more resistant to cisplatin than the non-CSCs, but there were no significant differences between HPV-positive and HPV-negative cells. The HPV-negative cancer cells yielded low colony formation after cell sorting. After transduction with HPV E6/E7, increased colony formation was observed in both CSCs and non-CSCs. Results from tail vein injections yielded no differences in development of lung colonies between HPV E6/E7-transduced cells and nontransduced cells. Conclusions. Human papillomavirus status does not correlate with the proportion of CSCs present in HNSCC. The HPV-positive cells and those transduced with HPV E6/E7 have a greater clonogenicity than HPV-negative cells. The HNSCC CSCs are more resistant to cisplatin than non-CSCs. This suggests that common chemotherapeutic agents may shrink tumor bulk by eliminating non-CSCs, whereas CSCs have mechanisms that facilitate evasion of cell death. Human papillomavirus status does not affect CSC response to cisplatin therapy, suggesting that other factors explain the better outcomes for patients with HPV-positive cancer.
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