Pemigatinib After Chemotherapy for the Treatment of Newly Diagnosed Acute Myeloid Leukemia

Inclusion Criteria:

• PRE-SCREENING INCLUSION CRITERIA:
• Ability to understand and the willingness to sign a written informed consent document
• Age >= 18 years at time of informed consent. Both men and women of all races and ethnic groups will be included
• Participants must consent to a bone marrow aspirate/biopsy that will be collected prior to start of planned 7+3 induction therapy. Patients with known favorable risk AML (ELN Guidelines) or FLT3 mutations should not be pre-screened. If the risk category is unknown, then it is okay to pre-screen patients for study. Adverse or intermediate risk needs to be confirmed prior to treatment with pemigatinib (during screening period) as outlined below
• TREATMENT INCLUSION CRITERIA:
• Eastern Cooperative Oncology Group (ECOG) performance status 0-2

• For dose-determining portion of study, study population is limited to: Newly diagnosed, morphologically documented AML, based on the World Health Organization (WHO) 2008 classification, with cytogenetics or mutations associated with the adverse prognostic risk group per European Leukemia Net (ELN) guidelines. These include:

  • t(6;9)(p23;q34.1); DEK-NUP214
  • t(v;11q23.3); KMT2A rearranged
  • t(9;22)(q34.1;q11.2); BCR-ABL1
  • inv(3)(q21.3q26.2) or t(3;3)(q21.3;q26.2); GATA2,MECOM(EVI1)
  • -5 or del(5q); -7; -17/abn(17p)
  • Complex karyotype - defined as three or more unrelated chromosome abnormalities in the absence of 1 of the WHO-designated recurring translocations or inversions, that is, t(8;21), inv(16) or t(16;16), t(9;11), t(v;11)(v;q23.3), t(6;9), inv(3) or t(3;3); AML with BCR-ABL1
  • Monosomal karyotype - defined by the presence of 1 single monosomy (excluding loss of X or Y) in association with at least 1 additional monosomy or structural chromosome abnormality (excluding core-binding factor AML)
  • Mutated RUNX1
  • Mutated ASXL1
  • Mutated TP53

• For the dose-expansion portion of the study, study population is limited to: Newly diagnosed, morphologically documented AML, based on the World Health Organization (WHO) 2008 classification, with a cytogenetic or mutation profile encompassing the intermediate prognostic risk groups per European Leukemia Net (ELN) guidelines.2 These include:

  • Wild-type or NPM1
  • t(9;11)(p21.3;q23.3); MLLT3-KMT2A
  • Cytogenetic abnormalities not classified as favorable or adverse
• Serum creatinine clearance >= 30 mL/min (as calculated by Cockcroft-Gault formula) (on or by day 8 of induction therapy, prior to starting pemigatinib)
• Serum phosphate within institutional upper limit of normal (ULN) or can be corrected with supplementation/ phosphate binders to be within institutional ULN (on or by day 8 of induction therapy, prior to starting pemigatinib)
• Serum electrolytes within institutional ULN: potassium, calcium (total, or corrected for serum albumin in case of hypoalbuminemia) and magnesium. If outside of normal limits, participant will be eligible when electrolytes are corrected (on or by day 8 of induction therapy, prior to starting pemigatinib)
• Total serum bilirubin =< 3 x ULN (on or by day 8 of induction therapy, prior to starting pemigatinib)
• Serum aspartate transaminase (AST) and/or alanine transaminase (ALT) =< 3 x ULN (on or by day 8 of induction therapy, prior to starting pemigatinib)
• Participants must consent to standard of care bone marrow aspirate/biopsies during treatment. Bone marrow biopsies will be obtained prior to study, on day 21 (+/-3 days, if considered institutional standard of care), after recovery from induction therapy, and at the end of consolidation and/or prior to allogeneic stem cell transplant
• Female participants of childbearing potential must agree to use effective contraception (2 forms of contraception or abstinence) from the screening visit until 6 months following the last dose of study treatment. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately
• Male patients of childbearing potential having intercourse with females of childbearing potential must agree to abstain from heterosexual intercourse or have their partner use 2 forms of contraception from the screening visit until 3 months following the last dose of study treatment. The male participant must also refrain from sperm donation from the screening visit until 3 months following the last dose of study treatment

Exclusion Criteria:

• PRE-SCREENING EXCLUSION CRITERIA:
• Diagnosis of acute promyelocytic leukemia (APL, or AML M3 subtype) per WHO classification
• AML with FLT3 mutations that qualify for standard of care treatment with 7+3 and midostaurin (e.g. FLT3 ITD or TKD with allelic ratio >0.05)
• Favorable risk AML: inv(16), t(8;21) or NPM1 mutations without FLT3 ITD mutations
• Any cancer-directed therapy within 2 weeks prior to starting planned 7+3 induction regimen, with the exception of hydroxyurea, which is allowed to control white blood cell count, or empiric all-trans retinoic acid (ATRA) for suspected APL
• Prior receipt of a selective FGFR inhibitor
• Known liver disease

• History of calcium and phosphate hemostasis disorder or systemic mineral imbalance with ectopic calcification of soft tissues

  • Except for commonly observed calcifications in soft tissues such as the skin, kidney tendon, or vessels due to injury, disease, or aging in the absence of systemic mineral imbalance)
• History of hypovitaminosis D being actively treated with supraphysiologic doses (e.g., 50,000 IU/weekly) to replenish the deficiency. Supraphysiologic doses of vitamin D need to be discontinued prior to starting pemigatinib. Vitamin D supplements are allowed

• Untreated human immunodeficiency virus (HIV) or active hepatitis C detectable by PCR, or chronic hepatitis B

  • Individuals positive for hepatitis B core antibody who are receiving intravenous immunoglobulin (IVIg) are eligible if HepB PCR is negative
• History of cerebrovascular accident or intracranial hemorrhage within 2 months of enrollment
• Unwillingness to receive infusion of blood products
• Inability to take oral medication
• Gastrointestinal condition/disorders that may raise gastric and/or small intestinal pH that could interfere with absorption, metabolism, or excretion of pemigatinib
• Known history and/or current evidence of ectopic mineralization/calcification, including (but not limited to): soft tissue, kidneys, intestine, myocardia, or lung, excepting calcified lymph nodes and asymptomatic arterial or cartilage/tendon calcification
• Concurrent active malignancy with expected survival of < 1 year
• Active central nervous system involvement with AML
• TREATMENT EXCLUSION CRITERIA:
• Clinically significant coagulation abnormality (e.g., disseminated intravascular coagulation) that is present on or by day 8 of induction therapy prior to starting pemigatinib

• Clinically significant or uncontrolled cardiac disease, including unstable angina, acute myocardial infarction within 6 months from day 1 of planned induction therapy, New York Heart Association class III or IV congestive heart failure, and uncontrolled arrhythmia (participants with pacemaker or with atrial fibrillation and well controlled heart rate are allowed). History or presence of an abnormal electrocardiogram (ECG) that, in the investigator's opinion, is clinically meaningful.

  • A screening QT interval by Fridericia's Correction Formula (QTcF) interval > 480 ms will result in exclusion.
  • For participants with an intraventricular conduction delay (QRS interval > 120 ms), the JTc interval may be used in place of the QTc with approval from Sponsor-Investigator. The JTc must be =< 340 ms if JTc is used in place of the QTc.
• Left ventricular ejection fraction (LVEF) by echocardiogram < 45% prior to initiating pemigatinib
• Active infection that is not well-controlled by antibacterial or antiviral therapy

• Current use of prohibited medications including use of any potent CYP3A4 inducers within 14 days or five half-lives (whichever is longer) before the first dose of study drug.

  • Use of CYP3A4 inhibitors should be avoided but, if medically necessary, is permitted with a dose reduction of study drug
  • Use of moderate CYP3A4 inhibitors are permitted.
  • Based on the low overall bioavailability of topical ketoconazole, there are no restrictions on topical ketoconazole
• Current use of prohibited medication
• Hypersensitivity to pemigatinib, or its excipients, when administered alone
• Current evidence of corneal disorder/keratopathy, including (but not limited to): bullous/band keratopathy, corneal abrasion, inflammation/ulceration, keratoconjuctivitis, etc., as confirmed by ophthalmologic examination
• Pregnancy or breastfeeding at the time of enrollment
• Any concurrent condition that, in the investigator's opinion, would jeopardize the safety of the participant or compliance with the protocol
• Active central nervous system involvement with AML