Pembrolizumab Shows Promise in Small Cell Lung Cancer

Excerpt:

“Pembrolizumab (Keytruda) induced an overall response rate (ORR) of 33% in patients with extensive-stage small cell lung cancer (SCLC), according to findings from the open-label, phase Ib KEYNOTE-028 trial published in the Journal of Clinical Oncology.

“One patient (4.2%) experienced a complete response, 7 (29.2%) had partial responses, and 1 (4.2%) had stable disease for less than 6 months. Thirteen patients (54.2%) experienced disease progression as the best overall response.”

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Combination of Standard-Dose Pembrolizumab With Reduced-Dose Ipilimumab Tolerable and Effective in Advanced Melanoma

Excerpt:

“The combination of the programmed death receptor 1 (PD-1) inhibitor nivolumab at a reduced dose (1 mg/kg) with the cytotoxic T-lymphocyte antigen 4 (CTLA-4) inhibitor ipilimumab at standard dose (3 mg/kg) for four doses followed by standard-dose nivolumab alone is a standard of care for patients with advanced, previously untreated melanoma. This is based on results from the phase III CheckMate-067 trial that confirmed combination therapy is significantly more effective than single-agent nivolumab or ipilimumab. However, improvement in efficacy is associated with increased treatment-related grade 3/4 adverse events and treatment discontinuation in nearly 40% of patients.”

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Maintenance Pembrolizumab Benefits Certain Patients With Small Cell Lung Cancer

Excerpt:

“Improvements in OS, but not PFS, indicate that maintenance treatment with pembrolizumab may benefit a subset of patients with small cell lung cancer, and biomarkers are needed to identify individuals in whom pembrolizumab may be effective, according to findings presented at the ASCO Annual Meeting.

” ‘The standard of care for these patients – 4 to 6 cycles of platinum plus etoposide – has not changed in the United States in the last 30 years,’ Shirish Gadgeel, MD, of the Karmanos Cancer Institute in Detroit, said during a presentation. ‘Despite a high response rate with this therapy, overall outcomes for these patients are quite poor. There is a need to identify other agents that can provide benefit in these patients.’ ”

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Melanoma News at ASCO 2017: Combination Treatments


There are many hopes that combining immune checkpoint inhibitor drugs, or combining them with drugs of other types (immunotherapy, targeted therapy, or chemotherapy) is the future of treatment for many kinds of cancer. Literally hundreds of clinical trials are actively exploring these combinations, and melanoma is the cancer for which trials of this type abound. Last month, the annual meeting of the American Society of Clinical Oncology (ASCO) in Chicago featured just a few presentations in this area, apparently because it is too early to report results from the many ongoing trials with drug combinations. Continue reading…


Pembrolizumab Shows Durable Antitumor Activity in TNBC

Excerpt:

“In patients with heavily pretreated metastatic triple-negative breast cancer (TNBC), pembrolizumab (Keytruda) showed durable antitumor activity, according to findings from cohort A of the phase II KEYNOTE-086 trial presented at the 2017 ASCO Annual Meeting.

“The overall response rate (ORR) was 4.7% (95% CI, 2.3-9.2) with single-agent pembrolizumab, including a complete response (CR) rate of 0.6% and a partial response (PR) rate of 4.1%. The stable disease (SD) rate was 20.6%. The median duration of response was 6.3 months (range, 1.2+ to 10.3+).”

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ASCO 2017: I-SPY 2 Trial: Combination of Pembrolizumab Plus Standard Neoadjuvant Therapy in High-Risk Breast Cancer

Excerpt:

“At the 2017 ASCO Annual Meeting, results were presented from the phase II I-SPY 2 trial investigating pembrolizumab (Keytruda) in combination with standard therapy (paclitaxel followed by doxorubicin and cyclophosphamide) as a neoadjuvant treatment for patients with locally advanced triple-negative breast cancer or hormone receptor–positive/HER2-negative breast cancer (Abstract 506).

“Findings showed that the addition of pembrolizumab increased the estimated pathologic complete response rate nearly threefold in patients with triple-negative breast cancer (60% vs 20%) and in patients with hormone receptor–positive/HER2-negative breast cancer (34% vs 13%) compared to standard therapy. Overall, based on Bayesian predictive probability of success in a confirmatory phase III trial, pembrolizumab has graduated from the I-SPY 2 TRIAL for all signatures in which it was tested (triple-negative breast cancer, all HER2-negative, and hormone receptor–positive/HER2-negative).”

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Incyte ‘IDO’ Combination Lung Cancer Results Improve Slightly at ASCO17

Excerpt:

“The Wall Street gang attending the American Society of Clinical Oncology (ASCO) annual meeting here will be crowding around a scientific poster this morning, craning their necks to see updated results from a small clinical trial combining Incyte’s (INCY) IDO inhibitor epacadostat with Merck’s (MRK) checkpoint inhibitor Keytruda in patients with non-small cell lung cancer.

“The headline number: The overall response rate remains 35%, although two lung cancer patients now have improved to complete responses, another 12 patients have a partial response. The data are updated as of Feb. 27.”

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Pembrolizumab/Entinostat Active in Melanoma Patients Refractory to Checkpoint Inhibitors

Excerpt:

“Combining the PD-1 inhibitor pembrolizumab (Keytruda) with the HDAC inhibitor entinostat demonstrated promising clinical activity and acceptable safety in patients with melanoma who were refractory to immune checkpoint inhibitors.

“In the ongoing phase II ENCORE 601 trial, the PD-1/HDAC combination induced a response in 4 of 13 patients (31%; 95% CI, 9-61). The responses comprised 3 confirmed responses and 1 unconfirmed response, according to the study findings, which were presented in a poster at the 2017 ASCO Annual Meeting. An additional 4 patients achieved stable disease.”

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Radiation Therapy Can Enhance Effectiveness of Immunotherapy in People With Advanced Lung Cancer, UCLA Study Finds

Excerpt:

“A new study by UCLA scientists has found that the breakthrough immunotherapy drug pembrolizumab can be more effective in improving survival in people with non-small cell lung cancer (NSCLC) if they have previously received radiation therapy, compared to those without a history of radiation treatment. The findings are important as the strategies of combining radiation therapy with anti-PD-1 antibodies such as pembrolizumb are currently being explored, and have the potential to increase the overall benefit of immunotherapy for people with NSCLC, the most common form of lung cancer.”

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