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Ref Type | Journal Article | ||||||||||||
PMID | (28843487) | ||||||||||||
Authors | Delyon J, Chevret S, Jouary T, Dalac S, Dalle S, Guillot B, Arnault JP, Avril MF, Bedane C, Bens G, Pham-Ledard A, Mansard S, Grange F, Machet L, Meyer N, Legoupil D, Saiag P, Idir Z, Renault V, Deleuze JF, Hindie E, Battistella M, Dumaz N, Mourah S, Lebbe C, null null | ||||||||||||
Title | STAT3 Mediates Nilotinib Response in KIT-Altered Melanoma: A Phase II Multicenter Trial of the French Skin Cancer Network. | ||||||||||||
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Abstract Text | Mutated oncogenic KIT is a therapeutic target in melanoma. We conducted a multicenter phase II trial on the KIT inhibitor nilotinib in patients with unresectable melanoma harboring KIT alteration. The primary endpoint was the response rate (complete response or partial response following Response Evaluation Criteria in Solid Tumors criteria) at 6 months. Pharmacodynamic studies using KIT sequencing, qPCR array, and immunostaining of downstream KIT effectors were performed during treatment. Twenty-five patients were included and received 400 mg oral nilotinib twice daily. At 6 months, nilotinib induced tumor response in four patients. The best overall response rate was 20% and the disease control rate was 56%, limited to patients harboring exon 11 or 13 mutations. Four patients exhibited durable response, including three persisting (3.6 and 2.8 years for two patients with stage IIIC and 2.5 years for one with IVM1b melanoma). A reduction in signal transducer and activator of transcription (STAT) 3 phosphorylation and its effectors (BCL-2, MCL-1) in tumors during follow-up was significantly associated with clinical response. In the KIT-mutated melanoma cell line M230, nilotinib reduced STAT3 signaling and STAT inhibitors were as efficient as KIT inhibitors in reducing cell proliferation. Our study evidences a significant association between STAT3 inhibition and response to nilotinib, and provides a rationale for future research assessing STAT inhibitors in KIT-mutated melanoma. |
Molecular Profile | Treatment Approach |
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Gene Name | Source | Synonyms | Protein Domains | Gene Description | Gene Role |
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Therapy Name | Drugs | Efficacy Evidence | Clinical Trials |
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Drug Name | Trade Name | Synonyms | Drug Classes | Drug Description |
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Gene | Variant | Impact | Protein Effect | Variant Description | Associated with drug Resistance |
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KIT | G565V | missense | unknown | KIT G565V lies within the cytoplasmic domain of the Kit protein (UniProt.org). G565V has been identified in the scientific literature (PMID: 28843487), but has not been biochemically characterized and therefore, its effect on Kit protein function is unknown (PubMed, Nov 2024). | |
KIT | L576R | missense | unknown | KIT L576R lies within the juxtamembrane domain (exon 11) of the Kit protein (PMID: 17372901). L576R has been identified in the scientific literature (PMID: 28843487, PMID: 28026870), but has not been biochemically characterized and therefore, its effect on Kit protein function is unknown (PubMed, Nov 2024). | |
KIT | L631F | missense | unknown | KIT L631F lies within the protein kinase domain (exon 13) of the Kit protein (UniProt.org). L631F has been identified in the scientific literature (PMID: 28843487), but has not been biochemically characterized and therefore, its effect on Kit protein function is unknown (PubMed, Nov 2024). | |
KIT | R634L | missense | unknown | KIT R634L lies within the protein kinase domain (exon 13) of the Kit protein (UniProt.org). R634L has been identified in the scientific literature (PMID: 28843487), but has not been biochemically characterized and therefore, its effect on Kit protein function is unknown (PubMed, Nov 2024). |
Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
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KIT mutant | melanoma | sensitive | Nilotinib | Phase II | Actionable | In a Phase II trial, Tasigna (nilotinib) treatment resulted in complete response in 4% (1/25), durable partial response in 16% (4/25), and stable disease in 56% (14/25) of melanoma patients harboring KIT mutations (PMID: 28843487; NCT01168050). | 28843487 |
KIT exon11 | melanoma | sensitive | Nilotinib | Phase II | Actionable | In a Phase II trial, Tasigna (nilotinib) treatment resulted in complete response in 5% (1/19) and partial response in 21% (4/19) of melanoma patients harboring KIT exon 11 or exon 13 mutations (PMID: 28843487; NCT01168050). | 28843487 |
KIT exon13 | melanoma | sensitive | Nilotinib | Phase II | Actionable | In a Phase II trial, Tasigna (nilotinib) treatment resulted in complete response in 5% (1/19) and partial response in 21% (4/19) of melanoma patients harboring KIT exon 11 or exon 13 mutations (PMID: 28843487; NCT01168050). | 28843487 |