Navigation Links
Chromosome 21 abnormality tells oncologists to treat pediatric ALL more aggressively

A recent study by members of the Children's Oncology Group reports results of a large trial showing that children whose leukemia cells have amplification of a portion of chromosome 21 may require more aggressive treatment for Acute Lymphoblastic Leukemia (ALL) than children without this gene amplification.

"This helps identify patients who need more therapy than they may otherwise get," says Stephen Hunger, MD, investigator at the University of Colorado Cancer Center, professor of pediatrics at the University of Colorado School of Medicine, and director of the Center for Cancer and Blood Disorders at Children's Hospital Colorado.

Hunger notes that this genetic abnormality was first described in 2003 and has subsequently been found in about 2 percent of pediatric ALL patients. Initial reports described poor outcomes for small groups of children with this abnormality, but the current study is by far the largest and shows the importance of this genetic abnormality even with modern treatments. The study documents the treatments and outcomes of more than 8,000 cases of pediatric ALL.

"What we found is that when this genetic abnormality is present in children with good risk features who get a standard level of treatment, there is more treatment failure than with similar, low-risk kids who don't have this genetic marker. But with kids whose risk features already dictate more aggressive treatment, this genetic abnormality doesn't seem to be associated with a worse outcome, because kids are already getting the appropriate treatment. Recognizing this abnormality could help us treat even otherwise low-risk kids more aggressively up front leading to improved cure rates," Hunger says.

Specifically, the genetic abnormality is defined as four or more copies of the gene RUNX1, located on an abnormal chromosome 21. And this amplification is already detected as a byproduct of another genetic test standard in pediatric ALL, namely a test for fusion of this RUNX1 gene with the gene ETV6.

"In a sense, the testing comes for free with other testing you're already doing," Hunger says.

A study published by the same group in 2012 showed that pediatric ALL cure rates are at or above 90.4 percent.

"In early 1960s this disease was incurable," Hunger says. "Then in the late 1960s, the cure rate was 10 percent. Now 90 percent of children and adolescents diagnosed with ALL will be cured. Still, a 90-percent survival rate is little consolation to the 10 percent of families whose child doesn't survive. There's still more work to be done."


Contact: Garth Sundem
University of Colorado Denver

Related medicine news :

1. Warwick scientists uncover how checkpoint proteins bind chromosomes
2. Mutations impair childhood growth and development by disrupting organization of chromosome pairs
3. Documenting womens experiences with chromosome abnormalities found in new prenatal test
4. Research reveals new understanding of X chromosome inactivation
5. Caloric restriction has a protective effect on chromosomes
6. Scientists discover how chromosomes keep their loose ends loose
7. Blame Common Colds on Your Chromosome Caps?
8. New Comprehensive Chromosome Screening Program at Pacific Fertility Center Refines Embryo Selection, Improves Pregnancy Rates
9. Dual systems key to keeping chromosomes intact
10. Spanish researchers link cancer to failures in chromosome protection for the first time
11. Study Pinpoints New Abnormality in Athletes Heart
Post Your Comments:
(Date:6/25/2016)... ... June 25, 2016 , ... Experts ... applications at AcademyHealth’s Annual Research Meeting June 26-28, 2016, at the Hynes Convention ... health care topics including advance care planning, healthcare costs and patient and family ...
(Date:6/25/2016)... ... , ... First Choice Emergency Room , the largest network of independent ... Director of its new Mesquite-Samuell Farm facility. , “We are pleased to announce ... Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. , ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the benefits of moderation, ... the latter, setting the bar too high can result in disappointment, perhaps even self-loathing. ... toward their goal. , Research from reveals that behind the ...
(Date:6/24/2016)... ... June 24, 2016 , ... Marcy was in a crisis. Her son James, eight, ... at his family verbally and physically. , “When something upset him, he couldn’t control his ... it. He would throw rocks at my other children and say he was going to ...
(Date:6/24/2016)... ... June 24, 2016 , ... Comfort Keepers® of San Diego, ... and the Road To Recovery® program to drive cancer patients to and from their ... to ensure the highest quality of life and ongoing independence. Getting to and ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 Research and ... News Issue 52" report to their offering. ... influenza treatment creates a favourable commercial environment for MedImmune to ... patient base that will serve to drive considerable growth for ... would serve to cap sales considerably, but development is still ...
(Date:6/23/2016)... BOGOTA, Colombia , June 23, 2016  Astellas today announced the establishment of Astellas Farma Colombia (AFC), a ... second affiliate in Latin America . ... ... ... ...
(Date:6/23/2016)... DUBLIN , June 23, 2016 ... the "Surgical Procedure Volumes: Global Analysis (United States, ... Australia, Canada)" report to their offering. ... an essential tool for healthcare business planners, provides surgical ... looks at surgery trends with an in-depth analysis of ...
Breaking Medicine Technology: