This section contains the latest highlighted research for patients from ASCO medical journals, including the Journal of Clinical Oncology, as well as an archive of research highlights from previous ASCO scientific meetings (2011-2015). For the latest research highlights from more recent ASCO meetings, visit the Cancer.Net Blog or check out Cancer.Net’s audio podcasts and videos for patients.
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A recent study showed that patients with gastrointestinal stromal tumor (GIST) who received surgery to remove any tumors remaining after treatment with the drug imatinib (Gleevec) lived longer and were less likely to have their disease worsen than patients who received only imatinib. Imatinib is a type of targeted therapy, a treatment that targets the tumor’s specific genes, proteins, or the tissue environment that contributes to cancer growth and survival. It is usually the first treatment for GIST that is metastatic (cancer that has spread) or recurrent (cancer that has come back after treatment), and works to treat the disease for about 80% to 85% of patients. However, most patients have tumors remaining after treatment with imatinib. These remaining tumors are thought to cause the disease to become resistant to imatinib, which means that the drug stops controlling the tumor’s growth. For this reason, researchers believed removing the remaining tumors with surgery would help prevent the tumor from becoming resistant to imatinib.
A new study showed that the targeted drug regorafenib is an effective treatment for patients with gastrointestinal stromal tumor (GIST) that has worsened because the other available treatments have stopped working. Targeted therapy is a treatment that targets a tumor's specific genes, proteins, or the tissue environment that contributes to cancer growth and survival. Specifically, regorafenib targets an abnormal enzyme called KIT. The currently available GIST treatments, imatinib (Gleevec) and sunitinib (Sutent), often slow or stop tumor growth at first, but eventually the drugs stop working and the cancer continues to grow. Regorafenib appears to work in a different way, even helping to slow GIST growth when other treatments are no longer working.
A study on the drug imatinib (Gleevec) for patients with high-risk gastrointestinal stromal tumor (GIST) showed that three years of treatment after surgery helped patients live longer and avoid recurrences (cancer that comes back after treatment). Imatinib is a type of targeted therapy, a treatment that targets the cancer's specific genes, proteins, or the tissue environment that contributes to cancer growth and survival. Specifically, it targets gene mutations (changes) that contribute to cancer growth for about 90% of people with GIST. The current standard treatment for GIST that can be surgically removed is one year of imatinib after surgery.
In a new study on gastrointestinal stromal tumor (GIST), researchers found that the drug sorafenib (Nexavar) is an effective treatment when imatinib (Gleevec) and/or sunitinib (Sutent) no longer work. GIST is a rare tumor that begins in the gastrointestinal tract, such as the stomach or small bowel. It often has a mutation (change) in either the KIT or PDGFRA gene, which contributes to its growth and spread. Drugs that help block these mutations, called targeted therapies, are the most common treatment options. The standard first treatment (called the first-line treatment) is imatinib, but most patients develop a resistance, meaning the treatment stops working and the tumor begins to grow and spread. After imatinib stops working, patients often receive sunitinib, a similar targeted therapy, but this drug can stop working as well. This study was developed to find another treatment option when imatinib and sunitinib no longer work.