“Poziotinib (NOV120101, HM781-36B) demonstrated high antitumor activity in patients with metastatic, heavily pretreated EGFR and HER2 exon 20 mutant non–small cell lung cancer (NSCLC), according to phase II study results presented at the 19th World Conference on Lung Cancer (WCLC) in Toronto, Canada.
“To date, the agent specifically induced a best response rate of 55%, including a 43% confirmed objective response rate (ORR) among evaluable patients with EGFR exon 20 mutant NSCLC in the study, said John V. Heymach, MD, PhD, who presented data of the investigator-initiated study of poziotinib in EGFR and HER 2-exon 20 mutant NSCLC (NCT03066206).”
“In a phase 2 clinical trial, the drug poziotinib has shrunk tumors by at least 30 percent in eight of 11 (73 percent) non-small cell lung cancer patients whose cancer includes an epidermal growth factor receptor (EGFR) mutation called an exon 20 insertion. Shrinkage ranged from 30 percent to 50 percent among the eight patients reaching partial response. One patient has progressed on the clinical trial, which began in March. All patients experienced some tumor shrinkage.”
Serra V, Vivancos A, Puente XS, Felip E, et al. Cancer Discovery. Aug 15, 2013.
“Genomic characterization of recurrent breast and lung tumors developed over the course of 10 years in a 29-year-old patient with a germline p53 mutation (Li-Fraumeni Syndrome) identified oncogenic alterations in the HER2 and EGFR genes across all tumors, including HER2 amplifications, an EGFR-exon 20 insertion, and the first-in-human HER2-V659E mutation showing a phenotypic convergent evolution towards HER2 and EGFR alterations. Following the identification of HER2-activating events in the most recent lung carcinoma and in circulating tumor cells, we treated the reminiscent metastatic lesions with a lapatinib-based therapy. A clinical response both symptomatic and radiologic was achieved. HER2-V659E sensitivity to lapatinib was confirmed in the laboratory.”