Moderna and Merck said Wednesday their personalized mRNA cancer vaccine met its main goals in a Phase 3 trial targeting melanoma, marking the first time a therapy of its kind has succeeded at that stage of testing. The news sent Moderna’s stock up more than 100% and lifted Merck shares as well, as investors bet on a new era for a company long defined by its Covid-19 vaccine.
The companies’ vaccine, called intismeran autogene, is built from a sample of a patient’s own tumor. It is designed to teach the immune system to recognize the specific mutations in that person’s cancer. In the trial, patients with high-risk melanoma, one of the deadliest forms of skin cancer, who had already had their tumors surgically removed received either the vaccine plus Merck’s immunotherapy Keytruda, or Keytruda alone.
The trial included 1,137 patients with high-risk melanoma, cases in which the cancer had grown deep or spread to nearby lymph nodes, or in some cases, to other parts of the body. All of them had already had their tumors removed by surgery before enrolling. Patients who got the vaccine alongside Keytruda went longer without their cancer coming back or spreading than those who got Keytruda alone, meeting the trial’s two main goals.
