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Ref Type Journal Article
PMID (16183119)
Authors Zhang LY, Smith ML, Schultheis B, Fitzgibbon J, Lister TA, Melo JV, Cross NC, Cavenagh JD
Title A novel K509I mutation of KIT identified in familial mastocytosis-in vitro and in vivo responsiveness to imatinib therapy.
Journal Vol Issue Date Pages Journal Short Title
Leukemia research 30 4 2006 Apr 373-8 Leuk Res
URL
Abstract Text KIT mutation has been implicated in sporadic mastocytosis, yet clusters in only a few sites in the molecule. For those malignancies associated with KIT mutation or over-expression, imatinib offers a specific therapeutic option, yet it has no effect on D816V mutation commonly seen in sporadic mastocytosis. The majority of cases of familial mastocytosis seem to lack KIT mutation. We report a kindred with mastocytosis in whom in vitro and in vivo sensitivity to imatinib was demonstrated. Mutation analysis of the KIT coding region in this family identified a novel A>T mutation at nucleotide 1547 [K509I] in exon 9 in both of the affected patients.

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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 mastocytosis sensitive Imatinib Case Reports/Case Series Actionable In a clinical case study, Gleevec (imatinib) treatment resulted in symptom improvements, liver size reduction, and decrease of enzymatic markers in a patient with familial mastocytosis harboring a germline KIT K509I mutation and inhibited growth of white blood cells derived from the patient in culture (PMID: 16183119). 16183119