Merck announced that the FDA approved KEYTRUDA, Merck’s anti-PD-1 therapy, as a single agent, for adjuvant treatment following surgical resection and platinum-based chemotherapy for adult patients with stage IB (T2a ≥4 centimeters [cm]), II, or IIIA non-small cell lung cancer (NSCLC).
The approval is based on data from the pivotal Phase 3 KEYNOTE-091 trial, also known as EORTC-1416-LCG/ETOP-8-15 – PEARLS. The major efficacy outcome measure was investigator-assessed disease-free survival (DFS). In patients who received adjuvant platinum-based chemotherapy following surgical resection, KEYTRUDA reduced the risk of disease recurrence or death by 27% (hazard ratio [HR]=0.73 [95% CI, 0.60-0.89]) versus placebo regardless of PD-L1 expression. The median DFS in patients regardless of PD-L1 expression who received adjuvant platinum-based chemotherapy following surgical resection was nearly five years (58.7 months) for the KEYTRUDA arm versus nearly three years (34.9 months) for the placebo arm, translating to a nearly two-year (23.8 months) DFS improvement versus placebo. In an exploratory subgroup analysis of the 167 patients (14%) who did not receive adjuvant chemotherapy, the DFS HR was 1.25 (95% CI, 0.76-2.05).
“While there have been many advances for patients with metastatic disease, surgery remains the typical treatment for people with stage IB, II and IIIA non-small cell lung cancer. Unfortunately, many of these patients who undergo surgery still see their disease return,” said Roy S. Herbst, M.D., Ph.D., deputy director and chief of medical oncology, Yale Cancer Center and Smilow Cancer Hospital and ensign professor of medicine (medical oncology) and professor of pharmacology, Yale School of Medicine. “Today’s approval for KEYTRUDA offers a new, important immunotherapy treatment option for stage IB (T2a ≥4 cm), II, or IIIA patients with non-small cell lung cancer following surgery and adjuvant chemotherapy. This provides, for the first time, an adjuvant immunotherapy treatment option for non-small cell lung cancer patients with stage IB disease and regardless of PD-L1 expression.”
The adverse reactions observed in KEYNOTE-091 were generally similar to those occurring in other patients with NSCLC receiving KEYTRUDA as a single agent, with the exception of hypothyroidism (22%), hyperthyroidism (11%), and pneumonitis (7%). Two fatal adverse reactions of myocarditis occurred.
Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue and can affect more than one body system simultaneously. Immune-mediated adverse reactions can occur at any time during or after treatment with KEYTRUDA, including pneumonitis, colitis, hepatitis, endocrinopathies, nephritis, dermatologic reactions, solid organ transplant rejection, and complications of allogeneic hematopoietic stem cell transplantation. Important immune-mediated adverse reactions listed here may not include all possible severe and fatal immune-mediated adverse reactions. Early identification and management of immune- mediated adverse reactions are essential to ensure safe use of KEYTRUDA. Based on the severity of the adverse reaction, KEYTRUDA should be withheld or permanently discontinued and corticosteroids administered if appropriate. KEYTRUDA can also cause severe or life-threatening infusion-related reactions. Based on its mechanism of action, KEYTRUDA can cause fetal harm when administered to a pregnant woman. For more information, see “Selected Important Safety Information” below.
“Six years ago, KEYTRUDA was the first anti-PD-1 therapy approved for the first-line treatment of metastatic non-small cell lung cancer and has changed the way metastatic disease is treated. Today’s approval marks the fifth indication for KEYTRUDA in non-small cell lung cancer and the first indication for KEYTRUDA in patients with resected stage IB (T2a ≥4 cm), II, or IIIA disease following adjuvant chemotherapy,” said Dr. Gregory Lubiniecki, vice president, oncology global clinical development, Merck Research Laboratories. “This is an important milestone as we continue our efforts to pursue meaningful advances for patients with non-small cell lung cancer.”
With this approval, KEYTRUDA is the only immunotherapy with an approved option for NSCLC regardless of PD-L1 expression in both the adjuvant and metastatic settings. In addition to today’s approval in the adjuvant setting, KEYTRUDA is indicated in combination with pemetrexed and platinum chemotherapy for the first-line treatment of patients with metastatic nonsquamous NSCLC, with no EGFR or ALK genomic tumor aberrations; in combination with carboplatin and either paclitaxel or paclitaxel protein-bound for the first-line treatment of patients with metastatic squamous NSCLC; as a single agent for the first-line treatment of patients with NSCLC expressing PD-L1 [tumor proportion score (TPS) ≥1%] as determined by an FDA-approved test, with no EGFR or ALK genomic tumor aberrations and is stage III where patients are not candidates for surgical resection or definitive chemoradiation, or metastatic; and as a single agent for the treatment of patients with metastatic NSCLC whose tumors express PD-L1 (TPS ≥1%) as determined by an FDA-approved test, with disease progression on or after platinum-containing chemotherapy. Patients with EGFR or ALK genomic tumor aberrations should have disease progression on FDA-approved therapy for these aberrations prior to receiving KEYTRUDA.
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