FDA approves Amgen's treatment for most deadly form of lung cancer

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The Food and Drug Administration on Thursday approved Amgen 's therapy for patients with the most deadly form of lung cancer. The agency cleared the drug, which will be marketed under the name Imdelltra, as a second or later line of treatment for people with advanced small-cell lung cancer. That means patients can take the drug if their cancer progresses while on or after trying one other form of treatment, which is typically a type of chemotherapy. Amgen's drug is also known by its generic name tarlatamab. In clinical trials, Amgen's drug has been shown to reduce tumor growth and help people with small-cell lung cancer live significantly longer. Of the more than 2.2 million patients who are diagnosed with lung cancer worldwide each year, small-cell lung cancer comprises 15%, or 330,000, of those cases, Amgen said. Around 80% to 85% of people with small-cell lung cancer are diagnosed with an advanced stage of the disease, according to a study published in the Journal of Cancer. There are around 35,000 patients with small-cell lung cancer in the U.S., Dr. Jay Bradner, Amgen's chief scientific officer, told CNBC. Small-cell lung cancer usually starts in the airways of the lung and grows rapidly, creating large tumors and spreading throughout the body. Symptoms include bloody phlegm, cough, chest pain and shortness of breath. Only 3% of patients with small-cell lung cancer that has spread to other parts of the body live past 5 years, according to the American Cancer Society. That five-year survival rate accounts for 7% among all patients with the condition, regardless of whether the cancer spreads. Bradner said patients with small-cell lung cancer typically have four to five months to live. Lynne Bell, a small-cell lung cancer patient from Atlanta, Georgia, is an exception. She says she was "horrified" and "in a dark place" after she was diagnosed with an advanced stage of the condition in 2021. But she started taking Amgen's Imdelltra in an ongoing clinical trial in September after other treatments, including chemotherapy, stopped working. Since then, Bell said her tumors have shrunk significantly and cancer scans "look great." She said she specifically noticed her pain go away after taking a second dose of Amgen's drug. When asked how long she would continue Imdelltra, Bell said, "If this medication is working and I'm not having any side effects, I'm good to go. I'm in it to win it." Maida Mangiameli, a small-cell lung cancer advocate and patient mentor from Naperville, Illinois, is also a survivor of the devastating disease. She was diagnosed with an advanced stage of the condition in 2018 but was deemed in remission this year, meaning the treatment she received has reduced the signs and symptoms of the cancer. Mangiameli has been in remission for five years. Her treatments included chemotherapy and 28 days of radiation therapy. She told CNBC that Amgen's Imdelltra may "not be something for me, but it might be down the road." Mangiameli added that she's excited to know that there will be another therapy option for other patients suffering from small-cell lung cancer. She said the development of new treatments for the disease has been "on the back burner" for several years. Amgen's Bradner also said treatment options "are pretty meager." "It's just one of the most dreadful cancers and so we needed a new solution," he said.