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- W2516996537 abstract "8045 Background: P is a fully human anti-HER3 antibody that inhibits HER3 binding with its ligand heregulin (HRG). Preclinically, P enhances anti-tumor activity with EGFR inhibitors, prevents HER3 reactivation after anti-EGFR treatment, and inhibits HRG-dependent activation. Phase Ib showed that P, with E (150mg/day PO), was tolerated at 18mg/kg IV q3w. Methods: This Ph2 randomized, placebo-controlled double-blind study assessed safety and efficacy of P+E vs. placebo (Pbo)+E in E-naïve sbjs with advanced NSCLC (2nd or later line). 215 sbjs were randomized to: 1) High Dose [HD]: P 18 mg/kg IV q3w; 2) Low Dose [LD]: P: 18 mg/kg IV X 1, 9 mg/kg IV q3w maintenance; or 3) Pbo q3wk. All subjects received E 150 mg/day PO. Endpoints included PFS (primary), and OS and safety (secondary). HRG, measured as mRNA, was prospectively hypothesized to be the primary predictive biomarker before database lock. High/Low HRG cutoff was set at the median of the blinded data. Results: 212 sbjs comprised the ITT. Median (m) PFS for ITT for HD, LD, and Pbo arms was 1.4 mos (HR 0.98), 2.5 mos (HR 0.77), and 1.6 mos, respectively (p=NS). 101 sbjs (51 HRG high) had adequate tissue for HRG testing. PFS was significantly improved in the HRG high subgroup (Table). HRG low subgroup showed no improvement in PFS (HR 0.92) and OS (HR 1.05) vs. Pbo. Grade >3 AE’s (HD, LD, Pbo) included: diarrhea (11.4%, 8.5%, 4.2%) and rash (5.7%, 7.0%, 2.8%). Conclusions: P showed improved PFS in the HRG high, but not in the ITT population. P safety was similar to Pbo with the exception of manageable rash and gastrointestinal effects. HRG appears to be a predictive biomarker for P, confirming preclinical findings (Schneider et al, Yonesaka et al, ASCO 2014). HERALD is the first randomized Pbo controlled trial in NSCLC to report a predictive biomarker for HER3. Based on these results, a 2-part (A, confirmation of HRG predictive value; B, pivotal HRG high only) Phase 3 study was initiated. Clinical trial information: NCT01211483. High dose P + E Low dose P + E Pooled doses P + E E alone (Pbo) mPFS (mos) 3.4 3.0 3.0 1.4 PFS HR (95% CI) 0.37 (0.16, 0.85)* 0.29 (0.13, 0.66)† 0.32 (0.16, 0.67)† mOS (mos) 6.1 10.7 9.7 5.0 OS HR (95% CI) 1.15 (0.50, 2.61) 0.60 (0.25, 1.41) 0.81 (0.39, 1.67) Log-rank p value: *<0.03, †<0.003)." @default.
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- W2516996537 date "2014-05-20" @default.
- W2516996537 modified "2023-09-23" @default.
- W2516996537 title "Phase 2 HERALD study of patritumab (P) with erlotinib (E) in advanced NSCLC subjects (SBJs)." @default.
- W2516996537 doi "https://doi.org/10.1200/jco.2014.32.15_suppl.8045" @default.
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