Vemurafenib/Cobimetinib Combo for Melanoma Approved by FDA

“The FDA has approved a combination of vemurafenib (Zelboraf) and cobimetinib (Cotellic) to treat patients with metastatic or unresectable BRAF V600E/K mutation-positive melanoma. The approval was based on based on an extension in progression-free survival (PFS) in the phase III coBRIM study.

“In the data submitted to the FDA, the median PFS with the combination was 12.3 versus 7.2 months with vemurafenib plus placebo (HR, 0.58; 95% CI, 0.46-0.72). PFS was the primary endpoint of the study with secondary outcome measures including overall survival (OS), objective response rate (ORR), duration of response, and safety.”


Exelixis Announces Positive Overall Survival Results from Phase 3 Pivotal Trial of Cobimetinib in Combination with Vemurafenib in Patients with BRAF V600 Mutation-Positive Advanced Melanoma

“Exelixis, Inc.EXEL, -1.02% today announced positive overall survival (OS) results from coBRIM, the phase 3 pivotal trial evaluating cobimetinib, a specific MEK inhibitor discovered by Exelixis, in combination with vemurafenib in previously untreated patients with unresectable locally advanced or metastatic melanoma carrying a BRAF V600 mutation. Exelixis’ collaborator Genentech, a member of the Roche Group, informed the company that coBRIM met its secondary endpoint of demonstrating a statistically significant and clinically meaningful increase in overall survival for patients receiving the combination of cobimetinib and vemurafenib, as compared to vemurafenib monotherapy. Ongoing study monitoring did not identify any new safety signals. Long-term safety data are expected later this year. These data will be the subject of a presentation at an upcoming medical meeting.”


Combining Two Targeted Therapies Results in Melanoma Patients Living Significantly Longer

“Latest results from a trial of a combination of two targeted therapies (dabrafenib and trametinib) to treat advanced melanoma have shown that patients are living significantly longer on the combined therapy than patients treated with another drug, vemurafenib, when used alone.

“Professor Caroline Robert, of the Institut Gustave Roussy, Paris, France, will tell the 2015 European Cancer Congress today (Monday) that not only is the median overall survival time longer for patients receiving the combination treatment, but also that 51% of patients receiving the combination treatment are alive after two years, compared to 38% of patients receiving vemurafenib alone.

“Analysis of data up to 13 March 2015 showed that the median overall survival time among patients with metastatic melanoma harbouring V600 mutations in the BRAF gene who received the combination treatment was 25.6 months. Among patients receiving vemurafenib alone, it was 18 months. On the basis of this finding, the European Commission approved the combination of dabrafenib and trametinib for use in Europe for these patients on 1 September 2015.”


New Kind of Cancer Study Finds New Targets for Tailored Treatments

“A new kind of cancer study supports the idea that traditional treatment can be turned on its head, with patients given targeted therapy based not on where their tumors started but on their own genetic mutations.

“Researchers used a targeted melanoma drug to treat patients with a range of cancers, from lung cancer to brain cancer, who weren’t being helped by traditional chemotherapy any more. Even though they had many different types of tumors, they all had one thing in common — a genetic mutation called BRAFV600.

“It’s a mutation familiar to doctors who treat melanoma, the deadliest form of skin cancer. It’s seen in about half of melanoma cases. A pill called vemurafenib, sold under the brand name Zelboraf, specifically targets the mutation. It helps about half of patients with melanoma who have the mutation.

“The same mutation is sometimes seen in colon cancer, lung cancer, thyroid cancer, brain tumors and some blood cancers.”


Cobimetinib and Vemurafenib Combination Treatment Is Highly Active in BRAF+ Melanoma

“Roche (SIX: RO, ROG; OTCQX: RHHBY) today announced follow-up data from two studies of the investigational MEK inhibitor cobimetinib in combination with Zelboraf® (vemurafenib). Updated data from the pivotal coBRIM Phase III study showed the combination helped people with previously untreated BRAF V600 mutation-positive advanced melanoma live a median of one year (12.3 months) without their disease worsening or death (progression-free survival; PFS) compared to 7.2 months with Zelboraf alone (hazard ratio [HR]=0.58, 95 percent confidence interval [CI] 0.46-0.72).1

“ ‘The combination of cobimetinib and Zelboraf extended the time people lived without their disease getting worse to a year,’ said Sandra Horning, M.D., Chief Medical Officer and Head of Global Product Development. ‘These results are exciting because they underscore the importance of combining medicines that target the signals, which cause about half of all melanomas to grow.’ “


Immune Checkpoint Inhibitors in Melanoma: New Directions


The drugs pembrolizumab (Keytruda) and nivolumab (Opdivo) were approved by the U.S. Food and Drug Administration (FDA) in 2014 and 2015, respectively. These two competing blockbuster drugs are already changing the outlook in metastatic melanoma, previously considered to be a fatal disease. Known as ‘immune checkpoint inhibitors,’ they work by releasing ‘brakes’ on a patient’s own immune system, freeing it to attack tumors. In the wake of their success, researchers are now taking immune checkpoint inhibition in new directions. Continue reading…


Drugs That Work in Melanomas with BRAF Mutation Also Work in Lung Cancers with Same Mutation

“A subset of lung cancer patients can derive important clinical benefits from drugs that are more commonly used to treat melanoma, the authors of a new academic clinical trial in Europe have reported at the European Lung Cancer Conference (ELCC) in Geneva, Switzerland.

“Dr. Oliver Gautschi, a medical oncologist from Lucern Cantonal Hospital in Switzerland, presented the results of the retrospective EURAF cohort study, which included lung cancer patients whose tumours carried specific mutations in the BRAF gene. The study was conducted by a network of European oncologists, without company involvement.

“BRAF mutations are commonly seen in melanoma patients, and are found in about 2% of lung adenocarcinomas, Gautschi explains. Several inhibitors of the B-Raf protein, including vemurafenib and dabrafenib, have been developed for use in melanoma patients, however there is currently no approved drug for BRAF-mutant lung cancer.

“As a result, experience with B-Raf inhibitors in lung cancer remains limited. ‘In the current study, we wanted to find out how many patients in Europe received B-Raf inhibitors outside of a clinical trial, and what their outcomes were,’ Gautschi says.

“The EURAF study gathered information on 35 lung cancer patients who had been identified as carrying BRAF mutations, who were treated with B-Raf inhibitors between 2012 and 2014.”


Advanced Melanoma Therapy Should Continue beyond Disease Progression

“Continued use of vemurafenib, even after disease progression, can improve survival outcomes for patients with BRAF V600-mutated advanced melanoma.

“More than half of diagnosed melanomas harbor BRAF V600 mutations, and the introduction of targeted agents such as vemurafenib (Zelboraf, Hoffmann-La Roche) and dabrafenib (Tafinlar, GlaxoSmithKline) triggered a paradigm shift in the treatment of BRAF-mutated melanoma.

“However, standard treatment practice is to discontinue use of these targeted agents upon disease progression, not unlike classic regimens such as cytotoxic chemotherapy.

“Because BRAF-mutated melanoma progresses rapidly after treatment, John Haanen, PhD, of the division of immunology at Netherlands Cancer Institute, and colleagues conducted a single-institution retrospective study to determine whether continued use of vemurafenib after disease progression could extend OS in patients with BRAF V600-mutated advanced melanoma.


Roche Gets FDA Priority Review for Cancer Treatment

“Roche Holding AG said Thursday one of its skin cancer treatments had been granted a priority review by the U.S. Food and Drug Administration, cutting the time the drug might take to become available to patients.

“Basel-based Roche said the FDA would make an accelerated decision on its cobimetinib drug when used with another medication, Zelboraf, to treat a serious form of skin cancer known as BRAF V600 mutation-positive melanoma. The drug is being developed by Genentech, part of the Roche Group, and Exelixis, Inc. which is a biopharmaceutical company.

“In a late stage trial of the drug, cobimetinib raised the median length of time patients experienced no worsening of their disease to 9.9 months when used with Zelboraf, up from 6.2 months for Zelboraf alone, Roche said.

“The priority review cuts the FDA decision time to six months from the standard 10 months.”