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A Multicenter, Open-Label, Phase 1 Study of AJ1-11095 Administered as Oral Monotherapy in Patients With Primary Myelofibrosis (PMF), Post-Polycythemia Vera Myelofibrosis (PPV-MF), or Post-Essential Thrombocythemia Myelofibrosis (PET-MF) Who Have Been Failed by a Type I JAK2 Inhibitor (JAK2i)


Description

AJX-101 is a first-in-human (FIH), phase 1, non-randomized, multi-center, open-label clinical trial designed to investigate the safety, tolerability, pharmacokinetics (PK), clinical activity and changes in biomarkers of an orally administered type II JAK2 inhibitor, AJ1-11095, in subjects with primary or secondary myelofibrosis previously treated with at least one type I JAK2 inhibitor.This is a phase 1, non-randomized, open-label study utilizing a 3+3 sequential dose escalation design followed by an expansion phase. The primary objective will be to evaluate the safety and tolerability of AJ1-11095, and establish a Maximally Tolerated Dose (MTD) and/or inform the establishment of a candidate Recommended Phase 2 dose (RP2D). The RP2D may be the maximally tolerated dose (MTD) or may be a dose below the MTD. The candidate RP2D will be based on AE pattern, PK and biomarker information, in addition to all available safety and efficacy data. Expansion cohorts will be enrolled to gather addit

Trial Eligibility

Inclusion Criteria: 1. 18 years of age or older. 2. Diagnosis of PMF, post-PV MF, or post-ET MF. 3. DIPSS Intermediate-2 or High-risk MF with ≤10% blasts, regardless of JAK2 mutation status. 4. Estimated spleen volume ≥450cm3. 5. MFSAF v.4.0 TSS ≥10, or at least 2 of 7 MFSAF-assessed symptoms with scores ≥3. 6. ECOG PS of 0, 1, 2, or 3. 7. Prior therapy with at least 1 type I JAK2 inhibitor, and either failed to achieve a response or relapsed after achieving a response. 8. ANC ≥1.0×10\^9/L. 9. Platelet count ≥75×10\^9/L. 10. eGFR ≥45 mL/min/1.73m2. 11. Serum total bilirubin ≤2.0 × upper limit of normal (ULN). 12. AST and ALT ≤3.0 × ULN. 13. QTcF ≤480 msec. Exclusion Criteria: 1. Prior splenectomy. 2. Splenic irradiation within 3 months prior to first dose of study drug. 3. Ongoing use of systemic corticosteroids at dose equivalent to \>10mg/day of prednisone. 4. Uncontrolled intercurrent illness such as an acute infection. 5. Chronic active or acute hepatitis B or C infection. 6. Chemotherapy in the previous 4 weeks prior to first dose of study drug (Hydrea is permitted until 5 days before starting protocol therapy). 7. Use of a JAK2 inhibitor in the previous 10 days. 8. Use of erythropoiesis stimulating agents (unless stable for \>8 weeks). 9. Peripheral neuropathy ≥ Grade 2 (NCI CTCAE v 5.0). 10. Unable or unwilling to undergo CT or MRI for spleen size imaging. 11. Pregnant or breastfeeding. 12. Requirement for therapy with a medication that is a strong CYP3A4 inhibitor as a concomitant medication.

Study Info

Organization

Ajax Therapeutics, Inc.


Primary Outcome

Number of patients with treatment-emergent adverse events as assessed by CTCAE v 5.0.


Outcome Timeframe Baseline through study completion, an average of 1 year

NCTID NCT06343805

Phases PHASE1

Primary Purpose TREATMENT

Start Date 2024-10-23

Completion Date 2026-10-15

Enrollment Target 76

Interventions

DRUG AJ1-11095

Locations Recruiting

Moffitt Cancer Cancer Center

United States, Florida, Tampa


University of Kansas Medical Center

United States, Kansas, Kansas City


Massachusetts General Hospital

United States, Massachusetts, Boston


Dana Farber Cancer Institute

United States, Massachusetts, Boston


Washington University School of Medicine

United States, Missouri, Saint Louis


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