http://www.onclive.com/conferenc ... ng-Cancer-Treatment
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Rizvi said excitement arose about the use of PD-1 and PD-L1 agents in the treatment of NSCLC when a study of nivolumab demonstrated durable responses in half of 129 patients, with higher doses of the drug bringing better results.
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Nivolumab
Updated results from the expansion cohort of the phase I trial of PD-1 antibody nivolumab (CA209-003) included results for 129 patients with previously treated, advanced NSCLC. For those who took 3 mg/kg of nivolumab, the overall response rate (ORR) was 24.3 % and median survival was 14.9 months, Rizvi said. Many responses occurred within the first 8 to 16 weeks, he said.
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The patients who tested positive for PD-L1 expression—about half the group—benefited more from nivolumab, although PD-L1-negative patients also responded.
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Future trials will test the combination of nivolumab and ipilimumab in lung cancer, the doctor said. “We learned from melanoma data with ipilimumab and nivolumab that the response rate was nothing short of dramatic—a 13% complete response rate,” he said. “PD-L1-negative melanoma patients have a worse response rate to nivolumab than PD-L1-positive patients, but when you give both nivolumab and ipilimumab, PD-L1 status doesn’t matter.”
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MK-3475
MK-3475, another PD-1 antibody, has demonstrated similar efficacy to nivolumab in an ongoing phase I trial (NCT01295827) of 38 patients with squamous or non-squamous NSCLC, Rizvi said. In the trial, the drug has demonstrated an ORR of 24% (9 patients) by investigator review and 21% (7 patients) by independent review.
Patients with high levels of PD-L1 expression had an ORR of nearly 70%, while patients with lower rates of expression experienced a lower response rate,
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MPDL3280A
In a phase Ia trial the PD-L1 antibody MPDL3280A demonstrated an ORR of 23% in all participants; response improved with higher PD-L1 positivity, Rizvi said.
The drug had little toxicity, and those results hinted that PD-L1 compounds might cause less pneumonitis than PD-1 compounds, the doctor said.
Investigators also found that smokers or former smokers, who had a 26% ORR to the drug, fared better than never-smokers, who had a 10% ORR, Rizvi said.
要我猜, nivolumab (抗PD1) + iplimumab (抗CTL4) + MPDL3280A (抗PDL1) 一起用, 半数以上各种肺癌都会被长期控制. 然后把LUCANIX (抗TGFb) 也加上, 更理想了. 它们加起来用是没有原则上的矛盾的.
这一天应该不远了. |