Navigation Links
Genetic variations indicate risk of recurrence, secondary cancer among head and neck cancer patients
Date:12/7/2009

HOUSTON - Eighteen single-point genetic variations indicate risk of recurrence for early-stage head and neck cancer patients and their likelihood of developing a second type of cancer, researchers at The University of Texas M. D. Anderson Cancer Center reported at the American Association for Cancer Research Frontiers in Cancer Prevention Research Conference.

The team examined 241 single nucleotide polymorphisms - variations of a single DNA building block in a gene - in eight genes involved in the creation of micro RNA (miRNA), small bits of RNA that regulate genes, and 130 miRNA binding sites on host genes where miRNAs exert their effects on regulating gene expression.

"We focus on miRNA pathways because these small molecules regulate between one third and half of genes," said senior author Xifeng Wu, M.D., Ph.D., professor in M. D. Anderson's Department of Epidemiology in the Division of Cancer Prevention and Population Sciences.

"Genetic variations in miRNA biogenesis genes and miRNA binding sites have been associated with the risk of having multiple solid tumors, so we hypothesized that these variations might be associated with the risk of recurrence or secondary primary tumors in these patients," Wu said.

About 10 percent of patients have a recurrence, and 15-25 percent go on to develop secondary primary tumors.

The team conducted a case-control study of 150 patients with recurrence or a second cancer and 300 patients without either. They found eighteen SNPs to be associated with recurrence/secondary cancer risk, including eleven SNPs in three miRNA biogenesis genes and seven in miRNA binding sites. Eight of the significant SNPs were in RNASEN gene, one of which was associated with a 72 percent increase in risk.

Compared to patients with fewer than four unfavorable genotypes, patients with five to nine unfavorable genotypes have a 2.4-fold increased risk and those with more than ten a 7.7-fold rise in risk.

Additional analysis of gene-gene interaction characterized the study patients into risk groups. The low-risk group had an event-free median survival time of more than 93 months. The highest-risk group had five times the risk of the low-risk group, and an event-free median survival of 35.9 months.

"Our results suggest that genetic variations in the miRNA biogenesis pathway and miRNA binding sites may be used to predict the risk of recurrence or secondary primary tumor in head and neck cancer patients," said first author Xiaofan Zhang, Ph.D., a postdoctoral fellow in epidemiology.


'/>"/>

Contact: Scott Merville
smerville@mdanderson.org
713-792-0661
University of Texas M. D. Anderson Cancer Center
Source:Eurekalert  

Related medicine news :

1. Many Parents Share Genetic Test Findings With Kids
2. Genetic predisposition increases childhood asthma risk
3. New Alzheimers findings: High stress and genetic risk factor lead to increased memory decline
4. Test Spots Genetic Damage Done by Smoking
5. Scientists demonstate link between genetic variant and effectiveness of smoking cessation meds
6. Scientists highlight benefits of genetic research in sport, but warn of ethical concerns
7. Genetics Hold Promise, Challenges for Cancer Care
8. Researchers genetically engineer micro-organisms into tiny factories
9. Study Questions Genetic Screening for Treatable Diseases
10. Researchers provide genetic associations from a genome-wide scan for cardiovascular disease traits
11. Genetic variation affects smoking cessation treatment
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genetic variations indicate risk of recurrence, secondary cancer among head and neck cancer patients
(Date:3/24/2017)... (PRWEB) , ... March 24, 2017 , ... ... to the military at the same time by providing Prehospital Trauma Life Support ... PHTLS is the world’s premier prehospital trauma education developed in cooperation with the ...
(Date:3/24/2017)... (PRWEB) , ... March 24, 2017 , ... ... from third world countries to hospitals in the United States, it’s a threat ... on the current obstacles facing infection prevention and offers strategies for the healthcare ...
(Date:3/24/2017)... ... , ... The Radiology Business Management Association (RBMA) has named the ... their 12th year, are among the most prestigious in radiology marketing because a panel ... retooled to recognize achievements in both large budget (over $5,000) and small budget (under ...
(Date:3/24/2017)... ... ... Texas Physical Therapy Specialists (TexPTS) is pleased to announce the opening ... is the group’s 7th location in San Antonio and 23rd in Texas. Dr. ... from the clinic, which opened March 22, 2017. , The team of ...
(Date:3/24/2017)... ... March 24, 2017 , ... Mlynarek Insurance Agencies, a Detroit ... business owners across eastern Michigan, is connecting with the Oxford/Orion FISH Food Pantry ... , The Oxford/Orion FISH Food Pantry works to ensure homeless, hungry, and underprivileged ...
Breaking Medicine News(10 mins):
(Date:3/24/2017)... 2017 Abdominal Aortic Aneurysm Repair Devices Market was valued at $1,844 ... a CAGR of 5.1% from 2016 to 2022. The endovascular stent graft system segment ... during the study period. Continue Reading ... ... ...
(Date:3/24/2017)... Research and Markets has announced the addition of the ... 2022" report to their offering. ... The global wound care market was worth $24,482.9 million in ... during 2016-2022 Among the various wound care products type, the ... market in 2015. Among the various applications, surgical wound segment held the ...
(Date:3/24/2017)... , March 24, 2017 ShangPharma, ... high-quality and cost-effective drug development and discovery ... and biotechnology industry, announced today the intent ... ShangPharma will be consolidating the Contract Research ... under Shanghai ChemPartner. These entities include ChemPartner ...
Breaking Medicine Technology: