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Ref Type Journal Article
PMID (30149884)
Authors Oh IJ, Hur JY, Park CK, Kim YC, Kim SJ, Lee MK, Kim HJ, Lee KY, Lee JC, Choi CM
Title Clinical Activity of Pan-HER Inhibitors Against HER2-Mutant Lung Adenocarcinoma.
Journal Clinical lung cancer
Vol 19
Issue 5
Date 2018 09
URL
Abstract Text HER2 mutations are found in 2% to 4% of non-small-cell lung cancer cases and are usually mutually exclusive with other genetic alterations. We screened a large cohort of patients from multiple institutions in Korea, described the characteristics of HER2-mutant cases, and reported on several patients who were treated with pan-HER inhibitors.The study population consisted of 360 patients diagnosed with adenocarcinoma from 4 institutions in Korea from June 2015 to September 2016. Tissue specimens from all participants were screened by direct sequencing, and next-generation sequencing was conducted only on specimens that were positive in direct sequencing. HER2-targeted therapy, either poziotinib or afatinib, was orally administrated.Next-generation sequencing was conducted in 129 patients, and finally 29 (8.1%) patients with HER2 mutation were identified. Most patients were female (58.6%), had never smoked (70.0%), and had stage IV non-small-cell lung cancer (55.2%). For all patients, the histologic type was adenocarcinoma, with no coexisting EGFR or ALK alterations. The most common type of HER2 mutation (48.3%) was c.2326_2327insTGT in exon 20. A partial response was observed in 2 patients who received poziotinib and 1 patient who received afatinib. The main toxicities of the pan-HER inhibitors were nausea, diarrhea, and mucositis.HER2 mutation was estimated at a frequency of approximately 8.1% in Korean patients with adenocarcinoma in the absence of known driver mutations. Because some of the HER2-mutant cases responded to poziotinib or afatinib, further studies are warranted.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
ERBB2 G776delinsVC lung adenocarcinoma predicted - sensitive Poziotinib Case Reports/Case Series Actionable In a Phase II trial, Poziotinib (HM781-36B) treatment resulted in a partial response in one patient and stable disease in another patient with lung adenocarcinoma harboring ERBB2 (HER2) G776delinsVC (PMID: 30149884; NCT02979821). 30149884
ERBB2 N813D lung adenocarcinoma predicted - sensitive Afatinib Case Reports/Case Series Actionable In a Phase II trial, Gilotrif (afatinib) treatment resulted in partial response in a patient with lung adenocarcinoma harboring ERBB2 (HER2) N813D (PMID: 30149884; NCT02979821). 30149884
ERBB2 Y772_A775dup lung adenocarcinoma predicted - sensitive Poziotinib Case Reports/Case Series Actionable In a Phase II trial, Poziotinib (HM781-36B) treatment resulted in one partial response, stable disease in one patient, and progressive disease in three patients with lung adenocarcinoma harboring ERBB2 (HER2) Y772_A775dup (reported as A775_G776insYVMA) (PMID: 30149884; NCT02979821). 30149884
ERBB2 E812K lung adenocarcinoma predicted - sensitive Poziotinib Case Reports/Case Series Actionable In a Phase II trial, Poziotinib (HM781-36B) treatment resulted in stable disease in a patient with lung adenocarcinoma harboring ERBB2 (HER2) E812K (PMID: 30149884; NCT02979821). 30149884