Navigation Links
Number of cancer stem cells might not predict outcome in HPV-related oral cancers

COLUMBUS, Ohio New research from The Ohio State University Comprehensive Cancer Center Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC James) suggests that it may be the quality of cancer stem cells rather than their quantity that leads to better survival in certain patients with oral cancer.

The researchers investigated cancer stem cell numbers in oral cancers associated with human papillomavirus (HPV) and in oral cancers not associated with the virus. Typically, patients with HPV-positive oral cancer respond better to therapy and have a more promising prognosis than patients with HPV-negative tumors. The latter are usually associated with tobacco and alcohol use.

The OSUCCC James team's findings, published in the journal Cancer, suggest that relying on the number of cancer stem cells in a tumor might inaccurately estimate the potential for the tumor's recurrence or progression.

"We show that high levels of cancer stem cells are not necessarily associated with a worse prognosis in head and neck cancer, a finding that could have far-reaching implications for patient care," says principal investigator Quintin Pan, PhD, associate professor of otolaryngology and scientist with the OSUCCC James Experimental Therapeutics Program.

Head and neck cancer is the sixth most common cancer worldwide, with an estimated 600,000 cases diagnosed annually. Although the disease is often linked to alcohol and tobacco use, cancer-causing types of HPV are a major risk factor for the malignancy, and cases of HPV-associated oral cancers have tripled in the past 30 years.

Cancer stem cells make up only a small percent of the malignant cells within a tumor. When these cells divide, they can produce either more cancer stem cells or the nondividing malignant cells that constitute the bulk of a tumor.

Research has shown that cancer stem cells are highly resistant to chemotherapy and radiation and those cancer stem cells that survive treatment cause tumor recurrence. For these reasons, it is thought that tumors with high numbers of cancer stem cells are more likely to recur.

In this study, Pan and his OSUCCC James collaborators hypothesized that patients with HPV-positive tumors had better outcomes because their tumors had fewer cancer stem cells than tumors with HPV-negative tumors. They discovered just the opposite, however.

Comparing numbers of cancer stem cells in human tumor samples and in oral-cancer cell lines, they found that the HPV-positive samples had 2.4 to 62.6 times more cancer stem cells than did the HPV-negative samples.

"Most cancer biologists would have expected tumors with high cancer stem cell numbers to be very difficult to cure because cancer stem cells are thought to convey resistance to conventional therapy," adds Ted Teknos, MD, study collaborator and director of head and neck cancer surgery at the OSUCCC James.

"However, it may be that HPV-induced head and neck cancer is highly curable primarily because the stem cells are sensitive to therapy. It's not the presence or absence of stem cells that is important in cancer, but rather how well does your therapy eliminate them."


Contact: Amanda J. Harper
Ohio State University Wexner Medical Center

Related medicine news :

1. Original Strength Listed As Number 1 Strength Training Book by Scott Iardella’s Rdella’s Training for 2013
2. HUMAN Ranks on Franchise 500 as Entrepreneur Magazine’s Number One Vending Franchise
3. The Law Offices of Sean M. Cleary Published an Infographic with Miami’s Emergency Phone Numbers
4. Crisis and Trauma Recovery Self-help Book by Renowned Therapist Tracie O’Keefe Becomes Number 1 Amazon Bestseller
5. Los Angeles Hair Transplant Surgeon Doubles the Number of Grafts in FUE Hair Restorations Producing More Efficient FUE Hair Transplantation
6. Stryker Hip Injury Claims Number Nearly 400 in Federal Court, Rottenstein Law Group LLP Reports
7. DePuy Hip Settlement News: Number of Federal Pinnacle Cases Now Exceeds 5,000, Rottenstein Law Group LLP Reports
8. Pradaxa Lawsuit News: Wright & Schulte LLC Reports on Growing Pradaxa Bleeding Litigation, As Number of Filings Exceed 1,800
9. Ross Insurance Offers Advice to Parents in an Effort to Help Reduce the Number of Teen Drinking and Driving Accidents
10. Heart Disease: The Number One Cause of Death in Diabetics Article and Video Released By Health News Wires
11. Bernstein Liebhard LLP Launches Stryker Hip Recall Website as Total Number of Rejuvenate, ABG II Hip Implant Lawsuits Nears 950 in U.S. Courts
Post Your Comments:
(Date:10/13/2015)... ... October 13, 2015 , ... ... private messaging application, announced today a significant contract that will provide its award-winning ... plans to build on the growing success of its Relay program, IBX Wire™, ...
(Date:10/13/2015)... ... 13, 2015 , ... e-con Systems Inc., a leading embedded design services company ... industry’s first RGB-IR pixel format camera with a USB 3.0 interface and e-CAM40_CUMI4682_MOD, ... of UVC USB 3.0 cameras, is based on the 1/3-inch OV4682 - a 4-megapixel ...
(Date:10/13/2015)... , ... October 13, 2015 , ... A child without ... why SmileCareClub , the leading remote invisible aligner system, has joined with ... otherwise go without it. For each aligner treatment plan purchased, SmileCareClub will donate one ...
(Date:10/13/2015)... (PRWEB) , ... October 13, 2015 , ... Protein is ... the body, including muscle, bone, and blood. But how much protein does the average ... than it might seem, according to the October 2015 issue of Harvard Men's ...
(Date:10/13/2015)... ... October 13, 2015 , ... ... targets the unique health needs of new moms. Postnatal Omega-3, which has ... ), utilizes Nordic Naturals’ exclusive, new, ultra-concentrated omega-3 oil. This breakthrough ...
Breaking Medicine News(10 mins):
(Date:10/13/2015)... Oct. 13, 2015  SeraCare Life Sciences, a leading ... that the company,s precision medicine business unit has launched ... materials for next-generation sequencing (NGS)-based tumor profiling assays.  The ... the same mixture of mutations in key oncogenes and ... AF20 mix , but is offered at five additional ...
(Date:10/13/2015)... 2015  Graduate students across the country, with ... will soon have the opportunity to learn about ... drug discovery and development process. Eli Lilly and ... 10 leaders from academic institutions to create an ... of Drug Development."  Lilly will formally unveil the ...
(Date:10/13/2015)... WASHINGTON , Oct. 13, 2015 /PRNewswire/ ... the first-ever direct-to-consumer laboratory home testing kit ... and digital technologies provide an unparalleled, detailed ... of breast milk—fats, proteins, carbs and key ... digital portal for personal health tracking.  In addition, ...
Breaking Medicine Technology: