Reference Detail

Ref Type

Journal Article

PMID

(37972337)

Authors

Gandhi MM, Ricciuti B, Harada G, Repetto M, Gildenberg MS, Singh A, Li YY, Gagné A, Wang X, Aizer A, Fitzgerald K, Nishino M, Alessi J, Pecci F, Di Federico A, Fisch A, Drilon A, Nardi V, Sholl L, Awad MM, Rotow J

Title

Amplification of Wild-Type RET Represents a Novel Molecular Subtype of Several Cancer Types With Clinical Response to Selpercatinib.

Journal	Vol	Issue	Date	Pages	Journal Short Title
JCO precision oncology	7		2023 Sep	e2300295	JCO Precis Oncol

URL

Abstract Text

RET rearrangements and RET activating point mutations represent targetable genomic alterations in advanced solid tumors. However, the frequency and clinicopathologic characteristics of wild-type RET amplification in cancer and its potential role as a targetable oncogenic driver are not well-characterized.In two institutional cohorts of patients with solid cancers from the Dana-Farber Cancer Institute (DFCI) and Memorial Sloan Kettering Cancer Center (MSKCC) whose tumors underwent next-generation sequencing (NGS), the frequency and clinicopathologic features of wild-type RET amplification in the absence of RET rearrangements or activating mutations was assessed. The findings were validated using merged data from The Cancer Genome Atlas (TCGA), Genomics Evidence Neoplasia Information Exchange (GENIE), and China Pan-Cancer data sets.The frequency of wild-type RET amplification across all solid cancers was 0.08% (26 of 32,505) in the DFCI cohort, 0.05% (26 of 53,152) in the MSKCC cohort, and 0.25% (71 of 28,623) in the cohort from TCGA, GENIE, and China Pan-Cancer. Cancer types with RET amplification included non-small-cell lung cancer (NSCLC), hepatobiliary cancer, prostate cancer, breast cancer, and others. The median RET copy number in RET-amplified cases was 7.5 (range, 6-36) in the DFCI cohort and 5.7 (range, 4-27.7) in the MSKCC cohort. Among 11 RET-amplified NSCLCs, eight had no other concurrent driver mutations. Finally, we report on a 69-year-old man with recurrent NSCLC harboring high-level wild-type RET amplification (22-28 copies) as the only identified putative genomic driver who experienced both a systemic and intracranial confirmed response to the RET inhibitor selpercatinib.Amplification of wild-type RET represents a novel, targetable molecular subset of cancer.

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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
RET amp	lung non-small cell carcinoma	predicted - sensitive	Selpercatinib	Case Reports/Case Series	Actionable	In a clinical case study, Retevmo (selpercatinib) treatment resulted in a complete response in the axillary lymph node and a partial response in the brain metastases in a patient with RET-amplified (CN=28) non-small cell lung cancer (PMID: 37972337).	37972337