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Gene FLT3
Variant D835X
Impact List missense
Protein Effect unknown
Gene Variant Descriptions FLT3 D835X indicates any Flt3 missense mutation that results in the aspartic acid (D) at amino acid 835 being replaced by a different amino acid. FLT3 codon 835 mutations are "hotspot" mutations that often result in constitutive phosphorylation of Flt3 and activation of downstream signaling (PMID: 11290608, PMID: 15256420) and therefore, are predicted to lead to a gain of Flt3 protein function.
Associated Drug Resistance

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Transcript NM_004119
gDNA chr13:g.28018503_28018505
cDNA c.2503_2505
Protein p.D835
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_004119 chr13:g.28018503_28018505 c.2503_2505 p.D835 RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
FLT3 D835X myelodysplastic syndrome not applicable N/A Guideline Prognostic FLT3 D835 mutations are associated with poor prognosis in patients with myelodysplastic syndromes (NCCN.org). detail...
FLT3 D835X acute myeloid leukemia sensitive Gilteritinib FDA approved - On Companion Diagnostic Actionable In a Phase III trial (ADMIRAL) that supported FDA approval, Xospata (gilteritinib) treatment resulted in complete remission (CR) or CR with partial hematologic recovery in 21% (29/138) of patients with relapsed or refractory acute myeloid leukemia harboring a FLT3 internal tandem duplication (ITD), D835, or I836 mutation (FDA.gov; NCT02421939). detail... detail...
FLT3 D835X acute myeloid leukemia sensitive Crenolanib Phase I Actionable In a Phase I trial, Crenolanib treatment resulted in an overall survival (OS) of 185 days in AML patients harboring FLT3 D835X that received no prior therapy (J Clin Oncol 34, 2016 (suppl; abstr 7008)). detail...
FLT3 D835X acute myeloid leukemia sensitive Selinexor + Sorafenib Phase Ib/II Actionable In a Phase I/II trial, combination of Selinexor and Nexavar (sorafenib) treatment resulted in complete remission in 29% (4/14) and more than 50% blast reduction in 14% (2/14) of patients with acute myeloid leukemia harboring FLT3 ITD and/or D835 mutations (ASH, 59th Annual Meeting and Exposition, Dec 2017, Abstract 1344; NCT01607892). detail...
FLT3 D835X acute myeloid leukemia sensitive Cytarabine + Daunorubicin + Midostaurin FDA approved - On Companion Diagnostic Actionable In a Phase III trial that supported FDA approval, treatment with Rydapt (midostaurin), combined with Cytosar-U (cytarabine) and Daunorubicin, improved overall survival (74.7 mo vs 25.6 mo) in patients with FLT3-mutant (D835X and I836X) or FLT3-ITD (exon 14 insertions) acute myeloid leukemia compared to Cytosar-U (cytarabine) and Daunorubicin with placebo (PMID: 28644114). detail... 28644114 detail...
FLT3 D835X acute myeloid leukemia predicted - sensitive LAM-003 Preclinical - Patient cell culture Actionable In a preclinical study, patient-derived acute myeloid leukemia cells harboring FLT3 D835X demonstrated sensitivity to LAM-003 treatment in culture (PMID: 31751472). 31751472
FLT3 exon 14 ins FLT3 D835X acute myeloid leukemia sensitive Crenolanib Phase I Actionable In a Phase I trial, Crenolanib treatment resulted in an overall survival (OS) of 128 days in AML patients harboring both FLT3 D835X and exon 14 insertion (ITD) that received no prior therapy, and an OS of 63 days in those progressed on TKIs (J Clin Oncol 34, 2016 (suppl; abstr 7008)). detail...
FLT3 exon 14 ins FLT3 D835X acute myeloid leukemia sensitive Selinexor + Sorafenib Phase Ib/II Actionable In a Phase I/II trial, combination of Selinexor and Nexavar (sorafenib) treatment resulted in complete remission in 29% (4/14) and more than 50% blast reduction in 14% (2/14) of patients with acute myeloid leukemia harboring FLT3 ITD and/or D835 mutations (ASH, 59th Annual Meeting and Exposition, Dec 2017, Abstract 1344; NCT01607892). detail...
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
FLT3 exon20 acute myeloid leukemia sensitive Cytarabine + Daunorubicin + Midostaurin Guideline Actionable Rydapt (midostaurin), in combination with Cerubidine (daunorubicin) and Cytosar-U (cytarabine), is included in guidelines for patients with acute myeloid leukemia harboring a mutation in the FLT3 tyrosine kinase domain (exons 14-23) (NCCN.org). detail...
FLT3 exon20 acute myeloid leukemia sensitive Gilteritinib Guideline Actionable Xospata (gilteritinib) is included in guidelines for patients with relapsed or refractory acute myeloid leukemia harboring a mutation in the FLT3 tyrosine kinase domain (exons 14-23) (NCCN.org). detail...
FLT3 mutant acute myeloid leukemia sensitive Cytarabine + Daunorubicin + Midostaurin Phase Ib/II Actionable In a Phase Ib clinical trial, Rydapt (midostaurin) treatment after Daunorubicin and Cytosar-U (cytarabine) induction resulted in complete remission in 92% (12/13) of acute myeloid leukemia patients carrying FLT3 mutations, although overall survival rate was similar to patients with wild-type FLT3 (PMID: 22627678). 22627678
FLT3 mutant acute myeloid leukemia sensitive Cytarabine + Daunorubicin + Midostaurin FDA approved - Has Companion Diagnostic Actionable In a Phase III trial that supported FDA approval, treatment with Rydapt (midostaurin), combined with Cytosar-U (cytarabine) and Daunorubicin, improved overall survival (HR=0.78, p=0.009) and event-free survival (HR=0.78, p=0.002) in patients with FLT3-mutant (ITD, D835X, and I836X mutations) acute myeloid leukemia compared to Cytosar-U (cytarabine) and Daunorubicin with placebo (PMID: 28644114; NCT00651261). 28644114 detail... detail...
FLT3 mutant acute myeloid leukemia sensitive Decitabine + Venetoclax Guideline Actionable Venclexta (venetoclax) in combination with Dacogen (decitabine) is included in guidelines for adult patients with acute myeloid leukemia harboring a FLT3 mutation (NCCN.org). detail...
FLT3 mutant acute myeloid leukemia sensitive Azacitidine + Midostaurin Phase Ib/II Actionable In a Phase Ib/II trial, acute myeloid leukemia patients harboring a FLT3 mutation demonstrated an improved remission duration when treated with the combination therapy, Rydapt (midostaurin) and Vidaza (azacitidine) (PMID: 25530214). 25530214
FLT3 mutant acute myeloid leukemia sensitive UNC2025 Preclinical Actionable In a preclinical study, UNC2025 inhibited FLT3 activation and growth of acute myeloid leukemia cells harboring a FLT3-ITD mutation in culture (PMID: 25068800). 25068800
FLT3 mutant acute myeloid leukemia sensitive Zotiraciclib Preclinical - Cell line xenograft Actionable In a preclinical study, Zotiraciclib (TG02) inhibited growth of FLT3-mutated acute myeloid leukemia cells in culture, resulted in complete tumor regression in cell line xenograft animal models (PMID: 21860433). 21860433
FLT3 mutant acute myeloid leukemia sensitive Azacitidine + Venetoclax Guideline Actionable Venclexta (venetoclax) in combination with Vidaza (azacitidine) is included in guidelines for adult patients with acute myeloid leukemia harboring a FLT3 mutation (NCCN.org). detail...
FLT3 mutant acute myeloid leukemia sensitive Selinexor + Sorafenib Phase Ib/II Actionable In a Phase I/II trial, combination of Selinexor and Nexavar (sorafenib) treatment resulted in complete remission in 29% (4/14) and more than 50% blast reduction in 14% (2/14) of patients with acute myeloid leukemia harboring FLT3 ITD and/or D835 mutations (ASH, 59th Annual Meeting and Exposition, Dec 2017, Abstract 1344; NCT01607892). detail...
FLT3 mutant acute myeloid leukemia sensitive Gilteritinib FDA approved - Has Companion Diagnostic Actionable In a Phase III trial (ADMIRAL) that supported FDA approval, Xospata (gilteritinib) treatment resulted in complete remission (CR) or CR with partial hematologic recovery in 21% (29/138) of patients with relapsed or refractory acute myeloid leukemia harboring a FLT3 internal tandem duplication (ITD), D835, or I836 mutation (FDA.gov; NCT02421939). detail... detail...
FLT3 mutant acute myeloid leukemia sensitive Gilteritinib Phase Ib/II Actionable In a Phase I/II trial, treatment with Gilteritinib (ASP2215) resulted in an overall response rate of 49% (93/191) in patients with relapsed or refractory acute myeloid leukemia harboring FLT3 mutations, compared to 12% (7/58) in patients with wild-type FLT3 (PMID: 28645776; NCT02014558). detail... 28645776
FLT3 mutant acute myeloid leukemia sensitive Crenolanib Phase I Actionable In a Phase I trial, Crenolanib treatment resulted in complete response (CR) in 39% (7/18), partial response (PR) in 11% (2/18), and an overall survival (OS) of 234 days in AML patients harboring FLT3 mutations (D835X, ITD, or both) that received no prior therapy, and CR in 17% (6/36), PR in 14% (5/36), and OS of 94 days in those progressed on TKIs (J Clin Oncol 34, 2016 (suppl; abstr 7008)). detail...
FLT3 mutant acute myeloid leukemia sensitive E6201 Preclinical Actionable In a preclinical study, acute myeloid leukemia cell lines harboring FLT3 mutations demonstrated increased sensitivity to E6201 induced growth inhibition and apoptosis in culture compared to FLT3 wild-type cells (PMID: 26822154). 26822154
FLT3 mutant acute myeloid leukemia sensitive Cytarabine + Venetoclax Phase Ib/II Actionable In a Phase I/II trial, Venclexta (venetoclax) in combination with low-dose cytarabine resulted in complete remission or complete remission with incomplete count recovery in 44% (7/16) of patients with acute myeloid leukemia harboring FLT3 mutations who were ineligible for intensive chemotherapy (ASH Annual Meeting, Dec 2018, Abstract 284; NCT02287233). detail...
FLT3 mutant acute myeloid leukemia sensitive Cytarabine + Venetoclax Guideline Actionable Venclexta (venetoclax) in combination with Cytosar-U (cytarabine) is included in guidelines for adult patients with acute myeloid leukemia harboring a FLT3 mutation (NCCN.org). detail...
Molecular Profile Protein Effect Treatment Approaches
FLT3 D835X unknown FLT3 Inhibitor
FLT3 exon 14 ins FLT3 D835X