FRIDAY, Oct. 20, 2017 (HealthDay News) — Depending on the cancer, between one as well as 10 genetic mutations are needed to trigger the development of tumors, a fresh study reports.
“We have addressed a longstanding question in cancer research that will has been debated since the 1950s: How many mutations are needed for a normal cell to turn into a cancer cell?” said study author Peter Campbell, with the Wellcome Trust Sanger Institute in Cambridge, England.
“The answer is actually — a smaller handful,” he added. “For example, about four mutations per patient, on average, drive liver cancers, whereas colorectal cancers typically require 10 or so driver mutations.”
The findings, culled via analyses of more than 7,0 tumors via 29 types of cancer, could help lead to more targeted therapies for treatment, the researchers said.
The researchers explained that will they developed a way to determine which genes are involved in cancer evolution as well as how many mutations in those genes drive cancer.
the item may someday be possible to use such approaches to identify which mutations are responsible for an individual patient’s cancer, the researchers said.
Study co-author Inigo Martincorena is actually also a research scientist at Wellcome Trust. “within the study, we revealed that will around half of these key mutations driving cancer occur in genes that will are not yet identified as cancer genes,” he said in an institute news Discharge.
“There is actually already much insight into the most important genes involved in cancer; nevertheless there are many more genes yet to be discovered,” Martincorena said. “We will need to bring together even larger numbers of cancers studied by DNA sequencing, into the tens of thousands, to find these elusive genes.”
The researchers also found that will the mutations responsible for cancer are usually well-tolerated by cells within the body. This specific was surprising because mutations that will people inherit via their parents are often poorly tolerated as well as are generally eliminated over generations, the researchers said.
“This specific research shows that will across cancer types a relatively consistent smaller number of such mutated genes is actually required to convert 1 normal cell into a cancer cell, nevertheless that will the specific genes chosen differ according to cancer type,” said study co-author Mike Stratton, director of the institute.
“The study also shows that will we have not yet identified many of these driver genes, as well as they will be the target for further searching within the future. This specific increasingly precise understanding of the underlying improvements that will result in cancer provides the foundation for the discovery as well as use of targeted therapies that will treat the disease,” Stratton said.
The study was published Oct. 19 within the journal Cell.
— Robert Preidt
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SOURCE: Wellcome Trust Sanger Institute, news Discharge, Oct. 19, 2017
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