KPT-9274 in Patients With Relapsed and Refractory Acute Myeloid Leukemia

A Phase 1 Open-label Study of KPT-9274 in Patients With Relapsed and Refractory Acute Myeloid Leukemia

This study will evaluate the safety and tolerability of oral KPT-9274 for the treatment of patients with relapsed or refractory acute myeloid leukemia.

Study Overview

• Status: Completed
• Conditions: Acute Myeloid Leukemia; Acute Myeloid Leukemia, in Relapse; Acute Myeloid Leukemia Refractory
• Intervention / Treatment: Drug: KPT-9274

Detailed Description

KPT-9274 is a first-in-class orally bioavailable, non-competitive, small molecule, dual modulator of p21 protein (Cdc42/Rac)-activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase /PBEF/visfatin (NAMPT). NAMPT is the rate-limiting enzyme in the metabolic scavenging pathway that utilizes nicotinamide to replenish nicotinamide adenine dinucleotide (NAD), an essential metabolic cofactor and second messenger. Recent investigations have shown that in in vitro and in vivo models, NAMPT is uniquely essential for relapsed or refractory AML stem cells. Targeting relapsed AML stem cells, through targeting of NAMPT, may allow for a promising therapeutic opportunity for patients with relapsed or refractory AML.

• Study Type: Interventional
• Enrollment (Actual): 16
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Colorado
    • Aurora, Colorado, United States, 80045
      • University of Colorado Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 14 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Written informed consent obtained prior to any study related procedures required solely for this research study.
2. Age ≥18 years.
3. Patients with WHO-confirmed non-APL AML who have not responded to or relapsed after at least one prior therapy and for whom no standard therapy that may provide clinical benefit is available.
4. Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2.

5. Adequate hepatic function:

   • Total bilirubin < 1.5 times the upper limit of normal (ULN) (except patients with Gilbert's syndrome [hereditary indirect hyperbilirubinemia], subjects with Gilbert's syndrome, total bilirubin needs to be ≤ 4 x ULN).
   • Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 2.5 times ULN (except patients with known liver involvement of their AML who must have AST and ALT ≤ 5.0 times ULN).
6. Adequate renal function: estimated creatinine clearance of ≥ 60 mL/min, calculated using CKD-EPI Creatinine Equation (2021). https://www.kidney.org/content/ckd-epi-creatinine-equation-2021

7. Female patients of child-bearing potential must agree to use dual methods of contraception (including one highly effective and one effective method of contraception) and have a negative serum pregnancy test at Screening. For both male and female patients, effective methods of contraception must be used throughout the study and for 3 months following the last dose.

   1. Fertile female patients must agree to refrain from egg donation from first dose until at least 3 months following the last dose of KPT-9724.
   2. Women should not breastfeed during treatment with KPT-9724 and for 2 weeks after the last dose.
8. 8. Male patients must use 2 highly effective methods of contraception if sexually active with a female of child-bearing potential, during treatment with KPT-9724, during a period of 2 weeks (5 half-lives) after the last dose of KPT-9724 plus a period of 3 months. (for 3.5 months after their last dose of KPT-9724). Fertile male patients must agree to refrain from sperm donation from first dose until at least 3.5 months following the last dose of KPT-9724.

Exclusion Criteria:

1. Female patients who are pregnant or lactating.
2. Radiation, chemotherapy, immunotherapy or any other anticancer therapy, including investigational anti-cancer therapy ≤ 2 weeks prior to C1D1. Hydroxyurea is not considered an anti-cancer therapy.
3. Patients who have not recovered or stabilized (Grade 1 or to their baseline for non-hematologic toxicities) from toxicities related to their previous treatment, except for alopecia.
4. White blood cell count ≥25x109/L (hydroxyurea or leukapheresis permitted to reduce to below the exclusion criteria threshold and allow eligibility)
5. Patients with known active central nervous system (CNS) disease
6. Clinically significant severe heart disease
7. Subjects with uncontrolled systemic fungal, bacterial, viral or other infection despite appropriate antibiotics or other treatment.
8. Known, active hepatitis A, B, or C infection; or known to be positive for HCV RNA or HBsAg (HBV surface antigen). Testing is not required.
9. Patients with significantly diseased or obstructed gastrointestinal tract or uncontrolled vomiting or diarrhea that could interfere with the absorption of KPT-9274.
10. Serious psychiatric or medical conditions that, in the opinion of the Investigator, could interfere with treatment, compliance, or the ability to give consent.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Sequential Assignment
• Masking: Single

Number of Arms

6

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: De-escalation Cohort; 20mg; For the purposes of dose escalation decisions, a standard 3+3 dose escalation design will be used.The initial cohort, Cohort 1, will consist of 3 enrolled patients who will be treated at 30 mg. If the MTD is exceeded at cohort 1, de-escalation to cohort 0 (20 mg) will occur. If the MTD is not exceeded in cohort 1, dose escalation will continue based on a standard 3+3 design at the dose levels.	Drug: KPT-9274; KPT-9274 is a first-in-class orally bioavailable, non-competitive, small molecule, dual modulator of p21 protein (Cdc42/Rac)-activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase /PBEF/visfatin (NAMPT). NAMPT is the rate-limiting enzyme in the metabolic scavenging pathway that utilizes nicotinamide to replenish nicotinamide adenine dinucleotide (NAD), an essential metabolic cofactor and second messenger. Recent investigations have shown that in in vitro and in vivo models, NAMPT is uniquely essential for relapsed or refractory AML stem cells. Targeting relapsed AML stem cells, through targeting of NAMPT, may allow for a promising therapeutic opportunity for patients with relapsed or refractory AML.
Active Comparator: Cohort 1; 30 mg; The initial cohort, Cohort 1, will consist of 3 enrolled patients who will be treated at 30 mg.	Drug: KPT-9274; KPT-9274 is a first-in-class orally bioavailable, non-competitive, small molecule, dual modulator of p21 protein (Cdc42/Rac)-activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase /PBEF/visfatin (NAMPT). NAMPT is the rate-limiting enzyme in the metabolic scavenging pathway that utilizes nicotinamide to replenish nicotinamide adenine dinucleotide (NAD), an essential metabolic cofactor and second messenger. Recent investigations have shown that in in vitro and in vivo models, NAMPT is uniquely essential for relapsed or refractory AML stem cells. Targeting relapsed AML stem cells, through targeting of NAMPT, may allow for a promising therapeutic opportunity for patients with relapsed or refractory AML.
Active Comparator: Cohort 2; 40mg; Dose escalation to 40 mg after initial cohort (Cohort 1) after a minimum of 1 cycle of treatment, defined as receiving ≥75% of KPT-9274 doses during Cycle 1 (e.g., ≥9 of 12 doses in the 3 doses/week schedule), or have a DLT within the first cycle of treatment to be evaluable for dose escalation decisions.	Drug: KPT-9274; KPT-9274 is a first-in-class orally bioavailable, non-competitive, small molecule, dual modulator of p21 protein (Cdc42/Rac)-activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase /PBEF/visfatin (NAMPT). NAMPT is the rate-limiting enzyme in the metabolic scavenging pathway that utilizes nicotinamide to replenish nicotinamide adenine dinucleotide (NAD), an essential metabolic cofactor and second messenger. Recent investigations have shown that in in vitro and in vivo models, NAMPT is uniquely essential for relapsed or refractory AML stem cells. Targeting relapsed AML stem cells, through targeting of NAMPT, may allow for a promising therapeutic opportunity for patients with relapsed or refractory AML.
Active Comparator: Cohort 3; 60mg; Dose escalation to 60 mg after initial cohort (Cohort 1) after a minimum of 1 cycle of treatment, defined as receiving ≥75% of KPT-9274 doses during Cycle 1 (e.g., ≥9 of 12 doses in the 3 doses/week schedule), or have a DLT within the first cycle of treatment to be evaluable for dose escalation decisions.	Drug: KPT-9274; KPT-9274 is a first-in-class orally bioavailable, non-competitive, small molecule, dual modulator of p21 protein (Cdc42/Rac)-activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase /PBEF/visfatin (NAMPT). NAMPT is the rate-limiting enzyme in the metabolic scavenging pathway that utilizes nicotinamide to replenish nicotinamide adenine dinucleotide (NAD), an essential metabolic cofactor and second messenger. Recent investigations have shown that in in vitro and in vivo models, NAMPT is uniquely essential for relapsed or refractory AML stem cells. Targeting relapsed AML stem cells, through targeting of NAMPT, may allow for a promising therapeutic opportunity for patients with relapsed or refractory AML.
Active Comparator: Cohort 4; 80mg; Dose escalation to 80 mg after initial cohort (Cohort 1) after a minimum of 1 cycle of treatment, defined as receiving ≥75% of KPT-9274 doses during Cycle 1 (e.g., ≥9 of 12 doses in the 3 doses/week schedule), or have a DLT within the first cycle of treatment to be evaluable for dose escalation decisions.	Drug: KPT-9274; KPT-9274 is a first-in-class orally bioavailable, non-competitive, small molecule, dual modulator of p21 protein (Cdc42/Rac)-activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase /PBEF/visfatin (NAMPT). NAMPT is the rate-limiting enzyme in the metabolic scavenging pathway that utilizes nicotinamide to replenish nicotinamide adenine dinucleotide (NAD), an essential metabolic cofactor and second messenger. Recent investigations have shown that in in vitro and in vivo models, NAMPT is uniquely essential for relapsed or refractory AML stem cells. Targeting relapsed AML stem cells, through targeting of NAMPT, may allow for a promising therapeutic opportunity for patients with relapsed or refractory AML.
Active Comparator: Cohort 5; 100mg; Dose escalation to 100 mg after initial cohort (Cohort 1) after a minimum of 1 cycle of treatment, defined as receiving ≥75% of KPT-9274 doses during Cycle 1 (e.g., ≥9 of 12 doses in the 3 doses/week schedule), or have a DLT within the first cycle of treatment to be evaluable for dose escalation decisions.	Drug: KPT-9274; KPT-9274 is a first-in-class orally bioavailable, non-competitive, small molecule, dual modulator of p21 protein (Cdc42/Rac)-activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase /PBEF/visfatin (NAMPT). NAMPT is the rate-limiting enzyme in the metabolic scavenging pathway that utilizes nicotinamide to replenish nicotinamide adenine dinucleotide (NAD), an essential metabolic cofactor and second messenger. Recent investigations have shown that in in vitro and in vivo models, NAMPT is uniquely essential for relapsed or refractory AML stem cells. Targeting relapsed AML stem cells, through targeting of NAMPT, may allow for a promising therapeutic opportunity for patients with relapsed or refractory AML.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Maximum Tolerated Dose (MTD)	Dose escalation will continue until the MTD is determined. The MTD is defined as the highest dose at which ≤1 patient experiences a DLT in Cycle 1. Count of participants who did not experience a DLT are listed in outcome measure data table.	28 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Count of Participants Who Did Not Experience a DLT Are Listed in the Outcome Measure Data Table	A RP2D equal to or less than the MTD will be declared after the MTD is determined and will be used for the Dose Expansion Phase, if conducted. After the RP2D is determined, a dose expansion phase, of up to 10 additional patients, might be conducted, in which a preliminary determination of efficacy will be conducted, using the ELN criteria.	28 days

Collaborators and Investigators

• Sponsor: University of Colorado, Denver
• Collaborators: Karyopharm Therapeutics Inc
• Investigators: Principal Investigator: Daniel Pollyea, MD, University of Colorado, Denver

Publications and helpful links

General Publications

• Jones CL, Stevens BM, Pollyea DA, Culp-Hill R, Reisz JA, Nemkov T, Gehrke S, Gamboni F, Krug A, Winters A, Pei S, Gustafson A, Ye H, Inguva A, Amaya M, Minhajuddin M, Abbott D, Becker MW, DeGregori J, Smith CA, D'Alessandro A, Jordan CT. Nicotinamide Metabolism Mediates Resistance to Venetoclax in Relapsed Acute Myeloid Leukemia Stem Cells. Cell Stem Cell. 2020 Nov 5;27(5):748-764.e4. doi: 10.1016/j.stem.2020.07.021. Epub 2020 Aug 20.

Study record dates

Study Major Dates

• Study Start (Actual): August 27, 2021
• Primary Completion (Actual): July 8, 2025
• Study Completion (Actual): October 22, 2025

Study Registration Dates

• First Submitted: May 25, 2021
• First Submitted That Met QC Criteria: June 3, 2021
• First Posted (Actual): June 7, 2021

Study Record Updates

• Last Update Posted (Actual): January 27, 2026
• Last Update Submitted That Met QC Criteria: January 7, 2026
• Last Verified: January 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms; Neoplasms by Histologic Type; Hematologic Diseases; Leukemia, Myeloid; Leukemia; Hemic and Lymphatic Diseases; Leukemia, Myeloid, Acute; KPT-9274
• Other Study ID Numbers: 20-2350.cc; NCI-2021-08786 (Other Identifier: CTRP); KPT-9274 (Other Identifier: Karyopharm Theraeutics Inc.)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No