Navigation Links
Genetic ancestry: A new look at racial disparities in head and neck cancer
Date:9/26/2010

DETROIT Head and neck cancer outcomes associated with race may be more closely linked to social and behavioral factors than biological differences, especially for African Americans, according to a new Henry Ford Hospital study.

Researchers found that while those who self-reported to be African American are at greater risk for late stage cancer, there was no correlation between patients' genetic ancestry and cancer stage or survival.

In fact, the study shows only 5 percent of patients who self-reported to be African American had more than 95 percent West African ancestry.

"We believe this is the first piece of evidence using genetic race to take a closer look at outcomes with respect to stage early or late and survival in patients with head and neck cancer," says study lead author Maria J. Worsham, Ph.D., director of research in the Department of Otolaryngology at Henry Ford Hospital.

"We know that African Americans are disproportionately diagnosed with late-stage cancer and have worse outcomes than Caucasians. While there has been no real consensus on the causes for this difference, it is possible access to care, stage at diagnosis and insurance status may be factoring into the equation."

Study results will be presented Sept. 26 at the American Academy of OtolaryngologyHead & Neck Surgery Foundation Annual Meeting in Boston.

In 2009, there were an estimated 35,720 new cases of head and neck squamous cell carcinoma (HNSCC) and approximately 7,600 deaths. Smoking and alcohol use are the primary risk factors for this type of cancer.

African Americans are more likely to be diagnosed with late-stage HNSCC and have worse survival than Caucasians. It's unknown whether significant biological rather than socioeconomic differences account for some of the disparities in outcomes.

Since self-reported race doesn't always offer a complete picture of a person's biologic make-up, Dr. Worsham and her colleagues set out to compare patients' self-reported race with their genetic ancestry to determine if there is any connection to head and neck cancer outcomes.

The study included 358 patients; 37 percent were African American.

The researchers examined diagnosis (late versus early stage) and overall survival for African Americans with HNSCC based on self-reported race and genetic West African ancestry.

During the past decade, many groups have developed and characterized sets of single nucleotide polymorphism markers that can distinguish genetic ancestry among major ethnic groups such as Asian and West African, called ancestry information makers (AIMs).

For the study, genetic ancestry was based on a panel of 100 AIMs to estimate genetic background.

"Using these genetic markers gives you additional statistical power. It's no longer two just categories - Black or White; it becomes a continuous variable. Race is not equal to genetics. Genetic markers don't define specific races," says Dr. Worsham.

Ultimately, the study found no correlation between West African genetic ancestry and HNSCC outcomes. Only self-reported race was associated with head and neck cancer stage.

Only 5 percent of self-reported African Americans had more than 95 percent West African ancestry, with 27 percent having less than 60 percent West African ancestry. By comparison, 48 percent who self-reported as Caucasian had more than 95 percent European American ancestry.

"The goal of using genetic ancestry is not to point out differences, but relatedness," says Dr. Worsham. "Health disparities within certain racial groups are very real, and what we're trying to achieve in terms of learning more about head and neck cancer is a leveling of the playing field to better diagnose and treat patients."


'/>"/>

Contact: Krista Hopson
khopson1@hfhs.org
313-874-7207
Henry Ford Health System
Source:Eurekalert  

Related biology news :

1. Rare genetic disorder gives clues to autism, epilepsy, mental retardation
2. Genetic Engineering & Biotechnology News reports on growing role of molecular diagnostics
3. Study finds genetic variant plays role in cleft lip
4. Genetic finding implicates innate immune system in major cause of blindness
5. American College of Medical Genetics receives $13.5M NIH contract
6. Clue to genetic cause of fatal birth defect
7. Can genetic information be controlled by light?
8. The American Society of Human Genetics hosts 58th Annual Meeting in Philadelphia
9. Modern genetics vs. ancient frog-killing fungus
10. Genetic based human diseases are an ancient evolutionary legacy
11. Genetic evidence for avian influenza movement from Asia to North America via wild birds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genetic ancestry: A new look at racial disparities in head and neck cancer
(Date:11/24/2016)... -- Cercacor today introduced Ember TM Sport Premium ... measure hemoglobin, Oxygen Content, Oxygen Saturation, Perfusion Index, ... approximately 30 seconds. Smaller than a smartphone, using only ... key data about their bodies to help monitor these ... Hemoglobin carries oxygen to muscles. When hemoglobin and ...
(Date:11/21/2016)... , Nov. 21, 2016   Neurotechnology ... object recognition technologies, today announced that the MegaMatcher ... cards was submitted for the NIST Minutiae ... passed all the mandatory steps of the evaluation ... is a continuing test of fingerprint templates used ...
(Date:11/17/2016)... it has just released a new white paper authored by Zettar that covers the ... transfer storage solutions. Photo - http://photos.prnewswire.com/prnh/20161116/440463 ... ... ... Setting up a high performance computing or HPC system can be a complicated endeavor ...
Breaking Biology News(10 mins):
(Date:12/4/2016)... CAMBRIDGE, Mass. and ... 4, 2016 SystemOne, a company focused ... platforms for the developing world, and Daktari Diagnostics, ... reality with its portable and ultrasensitive immunoassay-based CarePlatform™, ... development and license agreement to integrate Daktari,s technology ...
(Date:12/2/2016)... Dec. 2, 2016 CytRx Corporation (NASDAQ: ... specializing in oncology, today announced the appointment of ... industry consultant, and private healthcare investor, to its Board ... leader with clinical and strategic experience at the highest ... and CEO. "As one of the world,s leading orthopedic ...
(Date:12/2/2016)... NC (PRWEB) , ... December 01, 2016 , ... ... US Computational Science Symposium (CSS) and the popularity of US Single Day Events ... take place in early Summer 2018, in Raleigh, NC. Topics of the pharmaceutical ...
(Date:12/2/2016)... ... December 02, 2016 , ... Robots will storm the Prudential Center ... 3rd, 2016. The event, which is held on the United Nations International Day of ... Disabilities back into the workplace. Suitable Technologies is partnering with NTI to showcase how ...
Breaking Biology Technology: