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| Gene | RET |
| Variant | C618S |
| Impact List | missense |
| Protein Effect | gain of function - predicted |
| Gene Variant Descriptions | RET C618S lies within the extracellular domain of the Ret protein (UniProt.org). C618S is transforming in cell culture (PMID: 9230192), and therefore, is predicted to lead to a gain of Ret protein function. |
| Associated Drug Resistance | |
| Category Variants Paths |
RET mutant RET act mut RET C618S RET mutant RET C618X RET C618S |
| Transcript | NM_020975.6 |
| gDNA | chr10:g.43113648T>A |
| cDNA | c.1852T>A |
| Protein | p.C618S |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| NM_020630.7 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_020975 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_020975.6 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_001406744.1 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_001406760.1 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_001406743.1 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_001406765.1 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_020630 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_001406763.1 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_020975.5 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_020630.5 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| NM_001406759.1 | chr10:g.43113648T>A | c.1852T>A | p.C618S | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| RET C618S | malignant pheochromocytoma | predicted - sensitive | Selpercatinib | Case Reports/Case Series | Actionable | In a Phase I/II trial (LIBRETTO-001), Retevmo (selpercatinib) treatment resulted in a partial response lasting 3.8 months in a patient with metastatic pheochromocytoma harboring RET C618S (PMID: 38661071; NCT03157128). | 38661071 |
| RET C618S | medullary thyroid carcinoma | sensitive | Selpercatinib | FDA approved - On Companion Diagnostic | Actionable | In a Phase I/II trial (LIBRETTO-001) that supported FDA approval, Retevmo (selpercatinib) treatment resulted in an objective response rate (ORR) of 69% (38/55, 5 complete and 33 partial responses) in previously treated adult and pediatric patients of 12 years and older with medullary thyroid cancer harboring RET mutations as detected by an approved test, including RET C618S; ORR was 73% (64/88) in treatment naive patients (PMID: 32846061; NCT03157128). | 32846061 detail... detail... |