The mutations investigated in this study, however, are also found in other cancers, which extends the possible applications of these findings.
“This is the first study to discover that the altered protein created by GNAS is increased in cells with these mutations in MDS, and this results in the activation of processes that would render the cancer cells vulnerable to the MEK inhibitors,” said co-senior author Eirini Papapetrou, MD, PhD, Associate Professor of Oncological Sciences at The Tisch Cancer Institute. “The discovery that we can try to use MEK inhibitors in this cancer is also a first, and our findings also support future drug development to target GNAS, identified in this study.”
Papapetrou led the study with Gene Yeo, PhD, professor at UC San Diego School of Medicine. The researchers generated models of the mutations using stem cells, in order to study them in a physiological genetic context. They then turned the engineered cells into hematopoietic progenitor cellswhich are the relevant cell type in blood cancersand performed splicing and RNA binding analyses.
“This work integrates isogenic models of disease with cutting-edge RNA-omics to converge onto a new target for MDS,” Yeo said.
These analyses allowed the team to identify high-confidence targets and to identify the driver of the disease. The team showed that MDS cells from the model as well as cells from MDS patients with these mutations were sensitive to treatment with MEK inhibitors.
Source: Eurekalert
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