Featured Research

from universities, journals, and other organizations

Genetics, lifestyle provide clues to racial differences in head and neck cancer

Date:
September 14, 2011
Source:
Henry Ford Health System
Summary:
Why are African Americans more likely than Caucasians to be not only diagnosed with head and neck cancer, but also die from the disease? While the answer isn't a simple one, differences in lifestyle, access to care and tumor genetics may, in part, be to blame, according to a new study.

Why are African Americans more likely than Caucasians to be not only diagnosed with head and neck cancer, but also die from the disease?

While the answer isn't a simple one, differences in lifestyle, access to care and tumor genetics may, in part, be to blame, according to a new study from Henry Ford Hospital.

The study also finds that African Americans are more likely to be past or current smokers, one of the primary risk factors for head and neck cancer.

"We're really trying to understand why African Americans with head and neck squamous cell carcinoma do so poorly," says study lead author Maria J. Worsham, Ph.D., director of research in the Department of Otolaryngology-Head & Neck Surgery at Henry Ford.

"Using a comprehensive set of risk factors that are known to have some bearing on the disease, we're able to gain a better understanding of what contributes to racial differences and work to help improve patient care."

Results from the study will be presented on Sept. 14 in San Francisco at the American Academy of Otolaryngology-Head & Neck Surgery Foundation Annual Meeting. The study was funded by a NIH grant.

This year alone, it's estimated that 52,140 news cases of head and neck cancer will be diagnosed, and roughly 11,460 will die in 2011 from oral cavity, and pharyngeal and laryngeal cancers.

African Americans are more likely to be diagnosed with late-stage head and neck squamous cell carcinoma (HNSCC) and have a worse five-year survival than Caucasians. It's unknown whether significant biological rather than socioeconomic differences account for some of the disparities in outcomes.

To get at the root of these differences, Dr. Worsham and her research team used a large Detroit multi-ethnic group of 673 patients with HNSCC. Most notably, 42 percent of the study group is African American.

The researchers also took a very broad approach to the study, by examining many of the intertwined variables influencing health and disease to look for differences among African Americans and Caucasians.

In all, the study focused on 136 risk factors, including demographics (age, race, gender), smoking and alcohol use, access to care and type of cancer treatment (radiation and/or surgery). Tumor characteristics, including stage, biology and genetics, also were examined.

Much of the disparities seen among African Americans with head and neck cancer can be traced to access to care barriers, including insurance, that prevent them from getting timely and high-quality medical care, often resulting in late stage diagnosis.

Henry Ford researchers found that: • While 88% of African Americans in the study had medical insurance, the majority had Medicare or Medicaid instead of private health insurance. • African Americans also were more likely to be unmarried or living alone, both of which previous studies suggest have a negative impact on quality of life and survival. • In terms of cancer treatment, African Americans in this study were more than two times more likely than Caucasians to receive radiation therapy. Often times, if the tumor is extensive or it is not feasible to completely remove it, radiotherapy is initially given to try to shrink the tumor. The study showed fewer African Americans (43%) opted for surgery than Caucasians (49%). • The tumor tissue samples also held important clues. African American tumors were six to seven times more likely to present with lymphocytic response, which essentially is an entourage of immune system cells. These cells behave not only as first responders against tumors, but can also produce growth factors (chemicals) that feed tumor growth, such as forming blood vessels. • Compared to Caucasian tumors, African American tumors were almost two times more likely to have loss of the CDKN2A (cyclin-dependent kinase inhibitor 2A) gene and gain of the SCYA3 (small inducible cytokine A3) gene. CDKN2A is important to cell cycle regulation, and the SCYA3 gene product has dual roles of tumor lymph node metastasis and local host defense against tumors in HNSCC.

"Understanding and accounting for factors contributing to differences in head and neck cancer racial groups will ultimately aid in eliminating disparities and saving more lives from this devastating disease," says Dr. Worsham.

Along with Dr. Worsham, study co-authors from Henry Ford are Josena Stephen, M.D.; Mei Lu, Ph.D.; Kang Mei Chen, M.D.; Shaleta Havard; Veena Shah, M.D.; and Vanessa G. Schweitzer, M.D.

Research Support: NIH grant R01DE15990.


Story Source:

The above story is based on materials provided by Henry Ford Health System. Note: Materials may be edited for content and length.


Cite This Page:

Henry Ford Health System. "Genetics, lifestyle provide clues to racial differences in head and neck cancer." ScienceDaily. ScienceDaily, 14 September 2011. <www.sciencedaily.com/releases/2011/09/110914143630.htm>.
Henry Ford Health System. (2011, September 14). Genetics, lifestyle provide clues to racial differences in head and neck cancer. ScienceDaily. Retrieved September 3, 2014 from www.sciencedaily.com/releases/2011/09/110914143630.htm
Henry Ford Health System. "Genetics, lifestyle provide clues to racial differences in head and neck cancer." ScienceDaily. www.sciencedaily.com/releases/2011/09/110914143630.htm (accessed September 3, 2014).

Share This



More Mind & Brain News

Wednesday, September 3, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Can You Train Your Brain To Eat Healthy?

Can You Train Your Brain To Eat Healthy?

Newsy (Sep. 1, 2014) New research says if you condition yourself to eat healthy foods, eventually you'll crave them instead of junk food. Video provided by Newsy
Powered by NewsLook.com
Coffee Then Napping: The (New) Key To Alertness

Coffee Then Napping: The (New) Key To Alertness

Newsy (Aug. 30, 2014) Researchers say having a cup of coffee then taking a nap is more effective than a nap or coffee alone. Video provided by Newsy
Powered by NewsLook.com
Young Entrepreneurs Get $100,000, If They Quit School

Young Entrepreneurs Get $100,000, If They Quit School

AFP (Aug. 29, 2014) Twenty college-age students are getting 100,000 dollars from a Silicon Valley leader and a chance to live in San Francisco in order to work on the start-up project of their dreams, but they have to quit school first. Duration: 02:20 Video provided by AFP
Powered by NewsLook.com
Baby Babbling Might Lead To Faster Language Development

Baby Babbling Might Lead To Faster Language Development

Newsy (Aug. 29, 2014) A new study suggests babies develop language skills more quickly if their parents imitate the babies' sounds and expressions and talk to them often. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins