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Immunotherapy Emerges in Stage III NSCLC Treatment Landscape

Danielle Bucco
Published: Sunday, Dec 17, 2017

John Heinzerling, MD
John Heinzerling, MD
The FDA is currently reviewing a supplemental biologics license application for the PD-L1 inhibitor durvalumab (Imfinzi) for the treatment of patients with stage III, unresectable non–small cell lung cancer (NSCLC), based on positive progression-free survival (PFS) results from the phase III PACIFIC trial.

on Advanced Non–Small Cell Lung Cancer, Heinzerling, a radiation oncologist in the Department of Radiation Oncology at the Levine Cancer Institute, discussed the impact of durvalumab and other developments in the treatment of patients with stage III NSCLC.

OncLive: Can you provide an overview of your presentation on immunotherapy for patients with stage III locally advanced lung cancer?

Heinzerling: First, I discussed where we currently are with combination chemotherapy and radiation therapy for stage III disease. I reviewed the progress that has been made in the last 15 years.

We obviously want data-driven discussions, so I mainly talked about the recent data presented in the New England Journal of Medicine on the PACIFIC trial. [In] this trial…durvalumab…was [administered] after completion of chemoradiation. It showed a significant benefit in PFS and we believe it will benefit overall survival (OS), as well.

Can you discuss the impact of the PACIFIC trial?

The results demonstrated an impressive PFS benefit of 20%. That is something we assume would progress to an OS benefit. Based on those results, it has gotten a lot of publicity very quickly with the presentation and publication in September 2017. It has now been included in the national guidelines for stage III treatment and is being integrated into clinics. This is a fast turnaround from a result to integration into the clinic. It will become a standard part of stage III treatment in the future.

Do you think the success that we have seen with durvalumab is an indicator for upcoming immunotherapy agents in this stage?

This is just the beginning. Most of my talk involved discussing questions we still have for stage III disease, as well as earlier stages of disease and the role of immunotherapy. Durvalumab is given either in the maintenance setting or the adjuvant setting, but there are other trials looking at giving some other drugs earlier, concurrently integrating with radiation. As we saw in the PACIFIC trial, there seems to be even more potential benefit the earlier we give the drug.

What challenges remain in the treatment of this patient population?

The first thing that must be looked at is improving the efficacy and outcomes. Secondly, we need to focus on toxicity. Historically, we added chemotherapy to radiation concurrently for the treatment of stage III disease. Although this did increase survival and efficacy, it also increased toxicity. It would be ideal if we could add immunotherapy in a way that might increase efficacy and decrease toxicity. 

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