Virtual Library
Start Your Search
Carlos Barrios
Author of
-
+
MA02 - Improving Outcomes for Patients with Lung Cancer (ID 895)
- Event: WCLC 2018
- Type: Mini Oral Abstract Session
- Track: Advanced NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 9/24/2018, 10:30 - 12:00, Room 201 BD
-
+
MA02.05 - A Double-Blind, Randomized, Placebo-Controlled Phase 3 Noninferiority Study of Darbepoetin Alfa for Anemia in Advanced NSCLC (ID 13816)
11:00 - 11:05 | Author(s): Carlos Barrios
- Abstract
- Presentation
Background
The effect of erythropoiesis-stimulating agents on overall survival (OS) in patients with chemotherapy-induced anemia has long been debated. This study (NCT00858364) evaluated noninferiority of darbepoetin alfa (DAR) versus placebo for OS and progression-free survival (PFS) in anemic patients with NSCLC treated to a 12.0-g/dL hemoglobin ceiling.
a9ded1e5ce5d75814730bb4caaf49419 Method
Adults with stage IV NSCLC expected to receive ≥2 cycles of myelosuppressive chemotherapy, life expectancy >6 months, ECOG 0–1, and hemoglobin ≤11.0 g/dL were randomized 2:1 to DAR (500 µg SC) or placebo Q3W. Patients were stratified by region, histology, and hemoglobin. Primary endpoint was OS; a Cox proportional hazards model, stratified by randomization factors, was used to evaluate noninferiority (margin based on upper confidence limit [CL] for hazard ratio [HR] ˂1.15). Secondary endpoints were PFS (noninferiority) and incidence of transfusions or hemoglobin ≤8.0 g/dL from week 5 to end of efficacy treatment period (EOETP).
4c3880bb027f159e801041b1021e88e8 Result
4161 patients were screened, 2549 enrolled, and 2516 included in the primary analysis set: 1680 randomized to DAR and 836 to placebo. The study was stopped early per independent DMC recommendation. Patients were well matched between arms for age (mean 61.8 years), sex (66.0% male), and race (47.5% white). DAR was noninferior to placebo for OS (HRadj 0.92; 95%CL 0.83–1.01) and PFS (HRadj 0.95; 95%CL 0.87–1.04). DAR was superior to placebo for transfusion or hemoglobin ≤8.0 g/dL from week 5 to EOETP (OR 0.70; 95%CL 0.57–0.86; P<0.001). Objective tumor response was similar between arms (DAR 36.2%; placebo 32.6%). Incidence of serious adverse events was the same in both arms (31.1%). No unexpected adverse events or cases of antibody-mediated PRCA were observed (Table).
DAR (n=1685)
%Placebo (n=833)
%All treatment-emergent adverse events 84.5 86.3 Serious adverse events 31.1 31.1 Fatal adverse events 12.2 13.6 Adverse events leading to discontinuation of blinded drug 2.8 4.2 Adverse events of interest (standardized MedDRA query) CNS vascular disorders 1.5 1.0 Hypersensitivity 10.6 9.0 Severe cutaneous adverse reactions 2.1 1.3 Embolic and thrombotic events 5.3 4.1
8eea62084ca7e541d918e823422bd82e Conclusion
DAR dosed to a 12.0-g/dL hemoglobin ceiling was noninferior to placebo for OS and PFS and significantly reduced odds of transfusion or hemoglobin ≤8.0 g/dL in anemic patients with NSCLC receiving myelosuppressive chemotherapy.
6f8b794f3246b0c1e1780bb4d4d5dc53Only Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login, select "Add to Cart" and proceed to checkout. If you would like to become a member of IASLC, please click here.
-
+
P1.01 - Advanced NSCLC (Not CME Accredited Session) (ID 933)
- Event: WCLC 2018
- Type: Poster Viewing in the Exhibit Hall
- Track:
- Presentations: 1
- Moderators:
- Coordinates: 9/24/2018, 16:45 - 18:00, Exhibit Hall
-
+
P1.01-23 - High PD-L1 Expression is Less Common Than Expected Among Advanced NSCLC in Brazil. Are We Missing the Target? (ID 13620)
16:45 - 18:00 | Author(s): Carlos Barrios
- Abstract
Background
Immune checkpoint inhibitors improved outcomes of patients with advanced non-small cell carcinoma (NSCLC). In clinical trials 30% of patients had programmed death receptor ligand-1 (PD-L1) expression above 50% and this frequency may vary through different regions of the world. We aim to describe the real world dada on prevalence of PD-L1 expression, EGFR mutation and ALK translocation in Brazil.
a9ded1e5ce5d75814730bb4caaf49419 Method
Immunohistochemistry (IHC) for PD-L1, antibody 22C3 PharmDx Dako, was performed in 5 laboratories in Brazil from Aug/2017 through Apr/2018 in cases of advanced NSCLC considered for treatment with immunotherapy. Mutations in EGFR (exons 18 to 21) by Cobas®(Roche), NGS, or other non-specified tests and ALK by IHC (antibodies 5A4 or D5F3) or FISH (Vysis System) were performed in non-squamous cases. All analyses were with SAS (version 9.4). P-values <0.05 were deemed to be statistically significant.
4c3880bb027f159e801041b1021e88e8 Result
PD-L1 expression was assessed in 1382 samples of advanced NSCLC. The median age was 67 years, and 55.6% were male. 56.6% had adenocarcinoma, 18.0%, squamous, 20.7%, non-specified NSCLC, 2.5%, other histologies, 1.9%, missing. Of the 1380 cases, 17.4% presented PD-L1 expression ≥50%, 25.4%, 1-49%, and 57.1% <1%. The histological subtype showed association with the expression of PD-L1 (p=0,0431). In adenocarcinoma, 60.7% had no PD-L1 expression, 23.1%, had 1-49%, and 16.1%, ≥50%, while in squamous, 47.3% had no PD-L1 expression, 30.5% had 1-49%, and 22.0%, ≥50%. Among 885 samples with EGFR data, 10.9% were mutated. Both sex and histology showed association with EGFR mutation (p=0.0410 and p<0.0001). Among the men, 9.7% were mutated, while 13,4% of women were mutated. 16.4% of adenocarcinoma and 3.1% of squamous had EGFR mutation. In 855 samples with ALK data, 3.5% were rearranged. ALK rearrangement was associated with sex and age (p=0.0388 and p=0.0088) and was 2.2% in men and 4.8% in women. The group with age <50 had a higher prevalence of ALK rearrangement (8.6%). Among 735 patients without EGFR mutations or ALK rearrangements, 16.8% had PD-L1 ≥50% and 24.0% had 1-49%.
8eea62084ca7e541d918e823422bd82e Conclusion
Our results indicate a lower overall prevalence of PD-L1 expression in advanced NSCLC in Brazil as compared with clinical trial data. Among other potential factors, inadequate sample handling, pre-analytical issues, or epidemiology of the biomarker may impact PD-L1 expression. Prevalence of EGFR mutations and ALK translocations was within the range of prior publications in the country. Further regional and institutional analysis will be presented to better characterize the variations in prevalence of these biomarkers outside clinical trials.
6f8b794f3246b0c1e1780bb4d4d5dc53
