Molecular Profile Detail

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Profile Name KIT N655K
Gene Variant Detail

KIT N655K (gain of function - predicted)

Relevant Treatment Approaches KIT Inhibitor

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Molecular Profile Indication/Tumor Type Response Type Relevant Treatment Approaches Therapy Name Approval Status Evidence Type Efficacy Evidence References
KIT N655K Advanced Solid Tumor predicted - sensitive KIT Inhibitor Imatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT N655K demonstrated some sensitivity to Gleevec (imatinib) treatment in culture, resulting in reduced cell viability at high treatment dosages (PMID: 33212994). 33212994
KIT N655K Advanced Solid Tumor decreased response KIT Inhibitor Sunitinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT N655K demonstrated a reduced response to Sutent (sunitinib) treatment compared to cells expressing KIT T670I in culture (PMID: 33212994). 33212994
KIT N655K Advanced Solid Tumor decreased response KIT Inhibitor Regorafenib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT N655K demonstrated a reduced response to Stivarga (regorafenib) treatment compared to cells expressing KIT T670I in culture (PMID: 33212994). 33212994
KIT N655K Advanced Solid Tumor decreased response KIT Inhibitor Cabozantinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT N655K demonstrated a reduced response to Cometriq (Cabometyx, cabozantinib) treatment compared to cells expressing KIT T670I in culture (PMID: 33212994). 33212994
KIT N655K Advanced Solid Tumor predicted - sensitive KIT Inhibitor Avapritinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT N655K demonstrated some sensitivity to Ayvakit (avapritinib) in culture, but were less sensitive than cells expressing KIT W557_K558del (PMID: 33212994). 33212994
KIT N655K Advanced Solid Tumor predicted - sensitive KIT Inhibitor Ripretinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing KIT N655K demonstrated some sensitivity to Qinlock (ripretinib) treatment in culture, but were less sensitive than cells expressing KIT W557_K558del (PMID: 33212994). 33212994
KIT N655K gastrointestinal stromal tumor predicted - sensitive KIT Inhibitor Imatinib Case Reports/Case Series Actionable In a clinical case study, a patient with gastrointestinal stromal tumor (GIST) harboring a germline KIT N655K mutation, associated with hereditary GIST syndrome, demonstrated slow disease progression for 12 months while on treatment with Gleevec (imatinib) at 400mg/d, and upon disease progression following surgery and 15 months of Sutent (sunitinib) treatment, was rechallenged with Gleevec (imatinib) at 800mg/d and remained stable for a further 9 months (PMID: 33212994). 33212994