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Home NEWS Science News

Biomarker may predict which formerly treated cancer patients will develop highly fatal form of leukemia

Bioengineer by Bioengineer
December 3, 2016
in Science News
Reading Time: 3 mins read
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Credit: MD Anderson Cancer Center

Patients successfully treated for breast, colon and other cancers can go on to develop an often-fatal form of leukemia, sometimes years after completion of treatment, due to a genetic mutation leading to secondary malignancies known as therapy-related myeloid neoplasms (t-MNs).

A study conducted by researchers at The University of Texas MD Anderson Cancer Center revealed pre-leukemic mutations, called clonal hematopoiesis, may predict whether patients develop t-MNs. Clonal hematopoiesis appears to function as a biomarker for patients who develop t-MNs, a leukemia recognized for its extremely poor prognosis. The study findings were published today in The Lancet Oncology and presented at the annual meeting of the American Society of Hematology in San Diego.

"Therapy-related myeloid neoplasms occur in about 5 percent of cancer patients who were treated with chemotherapy and/or radiation therapy," said Andy Futreal, Ph.D., chair ad interim of Genomic Medicine. "In most cases, it is fatal, and currently there is no way to predict who is at risk or prevent it."

Being able to detect t-MNs earlier is crucial given that the disease usually occurs three to eight years following chemotherapy and/or radiation therapy.

"T-MNs are a problem that needs urgent attention," said Koichi Takashi, M.D., assistant professor of Leukemia and Genomic Medicine and a co-author on the Lancet Oncology paper. "Since many cancer patients are now living longer, t-MNs are an increasing concern for many cancer survivors."

Futreal's team studied 14 patients with t-MNs and found traces of pre-leukemic mutations or clonal hematopoiesis in 10. To determine if pre-leukemic mutations could reliably predict whether the patients would develop leukemia, the researchers compared prevalence of pre-leukemic mutations in the 14 patients with 54 patients who did not develop t-MNs after therapy.

"We found that prevalence of pre-leukemic mutations was significantly higher in patients who developed t-MNs (71 percent) versus those who did not (26 percent)," said Futreal. "We also validated these findings in a separate cohort of patients. Based on these findings, we believe pre-leukemic mutations may function as a new biomarker that would predict t-MNs development."

In the sample of 14 patients with t-MNs, the team looked at samples of bone marrow at the time of t-MNs development and blood samples obtained at the time of their primary cancer diagnosis.

"We found genetic mutations that are present in t-MNs leukemia samples actually could be found in blood samples obtained at the time of their original cancer diagnosis," said Takahashi. "Based on this finding, we believe the data suggest potential approaches of screening for clonal hematopoiesis in cancer patients that may identify patients at risk of developing t-MNs, although further studies are needed."

###

MD Anderson study team participants included Hagop Kantarjian, M.D.; Courtney DiNardo, M.D.; Simona Colla, Ph.D.; Farhad Ravandi, M.D.; and Guillermo Garcia-Manero, M.D., all of Leukemia; Feng Wang, Ph.D.; Li Zhao, Ph.D.; Curtis Gumbs; and Jianhua Zhang, Ph.D., Genomic Medicine; Denaha Doss; Kanhav Khanna; and Erika Thompson, Genetics; Keyur Patel, M.D., Ph.D.; and Carlos Bueso-Ramos, M.D., Ph.D., Hematopathology; Sativa Neelapu, M.D.; and Felipe Samaniego, M.D., Lymphoma and Myeloma; Xuelin Hang, Ph.D., Biostatistics; and Xifend Wu, M.D., Ph.D., Epidemiology. The study also included participation by Kyoto University, Kyoto, Japan.

The study was funded by the Cancer Prevention and Research Institute of Texas (R120501 and RP100202); the Welch Foundation (G-0040); the UT System STARS Award (PS100149); the Edward P. Evans Foundation; the Fundacion Ramon Areces; the Red and Charline McCombs Institute for the Early Detection and Treatment of Cancer Award; the National Cancer Institute SPORE Career Development Grant; the Khalifa Scholar Award; the National Institutes of Health (P30 CA016672); and donations to MD Anderson's MDS/AML Moon Shot Program.

Media Contact

Ron Gilmore
[email protected]
713-745-1898
@mdandersonnews

http://www.mdanderson.org

############

Story Source: Materials provided by Scienmag

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