Navigation Links
DNA Damage From Chemo May Help Spur Leukemia's Return
Date:1/12/2012

THURSDAY, Jan. 12 (HealthDay News) -- The chemotherapy used to treat a form of adult leukemia sets a trap that can result in the return of the disease within years, a new study suggests.

The finding confirms the suspicions of specialists who thought chemotherapy drugs could disrupt DNA through mutations and ultimately allow tumor cells to avoid the effects of the medications.

"Chemotherapy drugs are absolutely necessary to get leukemia patients into remission, but we also pay a price in terms of DNA damage," study co-author Dr. Timothy Ley, a professor of oncology at Washington University School of Medicine in St. Louis, said in a university news release.

These drugs "may contribute to disease progression and relapse in many different cancers, which is why our long-term goal is to find targeted therapies based on the mutations specific to a patient's cancer, rather than use drugs that further damage DNA," Ley added.

The type of leukemia in question is known as acute myeloid leukemia. While chemotherapy treatment can send the cancer into remission, 80 percent of patients die within five years. In the United States, about 13,000 cases of acute myeloid leukemia are diagnosed annually, most often in people age 60 and older.

The researchers came to their conclusions after studying the genomes -- the entire DNA, both healthy and cancerous cells -- from eight patients with acute myeloid leukemia. They watched to see what happened after the patients received chemotherapy.

The investigators found that tumors essentially reappeared, according to the report published in the Jan. 11 advance online edition of Nature.

"It's the same tumor coming back but with a twist," co-author Richard Wilson, director of university's Genome Institute, explained in the news release. It "comes back with new mutations that give the cells new strategies for surviving attack by whatever drugs are thrown at them. This makes a lot of sense but it's been hard to prove without whole-genome sequencing."

Commenting on the report, Louis DeGennaro, executive vice president and chief mission officer of the Leukemia & Lymphoma Society, said the study "demonstrates the critical need to identify disease-causing mutations in acute myeloid leukemia so that therapies targeted specifically at these mutations can be developed."

Ultimately, he added, "that would allow us to avoid the use of chemotherapy, which may contribute to cancer relapse."

For now, DeGennaro said, "while current chemotherapy regimens have liabilities, they represent the best treatment currently available and may result in complete remission, which would allow eligible patients to receive a stem cell transplant, the only treatment capable of curing acute myeloid leukemia."

More information

For more about acute myeloid leukemia, visit the U.S. National Library of Medicine.

-- Randy Dotinga

SOURCES: Louis J. DeGennaro, Ph.D., executive vice president and chief mission officer, Leukemia & Lymphoma Society, White Plains, N.Y.; Washington University School of Medicine in St. Louis, news release, Jan. 11, 2012


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Omega-3 fatty acids could prevent and treat nerve damage, research suggests
2. Agent shows ability to suppress brain metastasis and related damage
3. Alzheimers damage occurs early
4. Uncovering how cerebral malaria damages the brain
5. Marathons May Damage Part of Heart: Study
6. Toll-like receptors play role in brain damage in newborns
7. Too Much Acetaminophen Over Time May Damage Liver
8. Improved method of electrical stimulation could help treat damaged nerves
9. The serotonin system in womens brains is damaged more readily by alcohol than that in mens brains
10. Stem Cells Show Promise in Healing Damaged Hearts
11. Stem cell research hopes to repair brain damage of Parkinsons disease
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
DNA Damage From Chemo May Help Spur Leukemia's Return 
(Date:6/25/2016)... Viejo, California (PRWEB) , ... June 25, 2016 , ... ... to fit their specific project," said Christina Austin - CEO of Pixel Film Studios. ... fully customizable and all within Final Cut Pro X . Simply select a ...
(Date:6/25/2016)... ... June 25, 2016 , ... ... non-athletes recover from injury. Recently, he has implemented orthobiologic procedures as a method ... —Johnson is one of the first doctors to perform the treatment. Orthobiologics are ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... A recent ... that most people are unfamiliar with. The article goes on to state that individuals ... also many of these less common operations such as calf and cheek reduction. The ...
(Date:6/24/2016)... ... June 24, 2016 , ... Marcy was in a crisis. Her son James, eight, was ... his family verbally and physically. , “When something upset him, he couldn’t control his emotions,” ... He would throw rocks at my other children and say he was going to kill ...
(Date:6/24/2016)... ... June 24, 2016 , ... Dr. ... accelerated orthodontic treatment. Dr. Cheng has extensive experience with all areas of orthodontics, ... and accelerated osteogenic orthodontics. , Micro-osteoperforation is a revolutionary adjunct to orthodontic ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016 ... the "Structural Electronics 2015-2025: Applications, Technologies, Forecasts" ... In-Mold Electronics, Smart Skin, Structural ... Structural electronics involves electronic and/or ... protective structures, replacing dumb structures such as vehicle ...
(Date:6/24/2016)... June 24, 2016 Dehaier Medical Systems Ltd. ... which develops, markets and sells medical devices and wearable ... signed a strategic cooperation agreement with Hongyuan Supply Chain ... Chain") on June 20, 2016, to develop Dehaier,s new ... cooperation agreement, Dehaier will leverage Hongyuan Supply Chain,s sales ...
(Date:6/24/2016)... Research and Markets has announced the addition of the ... to their offering. ... World Market for Companion Diagnostics covers the world market for ... report includes the following: , World IVD ... (N. America, EU, ROW), 2015-2020 , World IVD Companion ...
Breaking Medicine Technology: