Reference Detail

Ref Type

Journal Article

PMID

(25139846)

Authors

de Melo Campos P, Machado-Neto JA, Scopim-Ribeiro R, Visconte V, Tabarroki A, Duarte AS, Barra FF, Vassalo J, Rogers HJ, Lorand-Metze I, Tiu RV, Costa FF, Olalla Saad ST, Traina F

Title

Familial systemic mastocytosis with germline KIT K509I mutation is sensitive to treatment with imatinib, dasatinib and PKC412.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Leukemia research	38	10	2014 Oct	1245-51	Leuk Res

URL

Abstract Text

Mastocytosis are myeloproliferative neoplasms commonly related to gain-of-function mutations involving the tyrosine kinase domain of KIT. We herein report a case of familial systemic mastocytosis with the rare KIT K509I germ line mutation affecting two family members: mother and daughter. In vitro treatment with imatinib, dasatinib and PKC412 reduced cell viability of primary mast cells harboring KIT K509I mutation. However, imatinib was more effective in inducing apoptosis of neoplastic mast cells. Both patients with familial systemic mastocytosis had remarkable hematological and skin improvement after three months of imatinib treatment, suggesting that it may be an effective front line therapy for patients harboring KIT K509I mutation.

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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
KIT K509I	systemic mastocytosis	sensitive	Dasatinib	Preclinical - Patient cell culture	Actionable	In a preclinical study, Sprycel (dasatinib) treatment inhibited growth and induced apoptosis of primary bone marrow mononuclear cells derived from patients with aggressive systemic mastocytosis harboring KIT K509I in culture (PMID: 25139846).	25139846
KIT K509I	systemic mastocytosis	sensitive	Imatinib	Case Reports/Case Series	Actionable	In a clinical case study, Gleevec (imatinib) treatment resulted in symptom and enzymatic improvements in 2 patients with aggressive systemic mastocytosis harboring KIT K509I, with 1 patient achieving a major response/complete remission, and inhibited growth of primary bone marrow mononuclear cells derived from both patients in culture (PMID: 25139846).	25139846
KIT K509I	systemic mastocytosis	predicted - sensitive	Midostaurin	Preclinical - Patient cell culture	Actionable	In a preclinical study, Rydapt (midostaurin) treatment inhibited growth but did not induce apoptosis in primary bone marrow mononuclear cells derived from patients with aggressive systemic mastocytosis harboring KIT K509I in culture (PMID: 25139846).	25139846