Recent Updates
Recently added Catalysts

INCB057643

Phase 1

Myelofibrosis | Small molecule | Oncology |Incyte Corporation|Trials Updated: Apr 1, 2026

INCB057643 development status

Highest phase Phase 1
Registered trials 4 across 1 sponsor since Mar 2016

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment140

FDA Designations

No designations recorded

INCB057643 clinical trials

INCB057643 · 1 trial · 7 indications

Phase 1 1
NCT04279847Safety and Tolerability Study of INCB057643 in Participants With Myelofibrosis and Other Advanced Myeloid NeoplasmsMyelofibrosis
ACTIVE NOT_RECRUITING140 Analytics
PHASE1ACTIVE NOT_RECRUITING
Safety and Tolerability Study of INCB057643 in Participants With Myelofibrosis and Other Advanced Myeloid Neoplasms
MyelofibrosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of treatment-emergent adverse events
Up to approximately 9 months

Defined as adverse events reported for the first time or worsening of a pre-existing event after first dose of study drug monotherapy and in combination with ruxolitinib.

Secondary Endpoints

Spleen Volume Response
Week 24
Duration of a Spleen Volume Response from baseline (MF only)
Up to approximately 9 months
Symptom Response Rate (MF or ET)
Week 24
Unlock Study Endpoints

Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1 : INCB057643 MonotherapyEXPERIMENTALINCB057643 dose escalation and dose expansion
Part 2 : INCB057643 Combination with RuxolitinibEXPERIMENTALCombination arm in dose escalation and dose expansion

Interventions

NameTypeDescription
INCB057643DRUGINCB057643 dose escalation and dose expansion.
RuxolitinibDRUGRuxolitinib will be administered twice a day using the dose described for each Cohort in the protocol for Part 2.
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites48

Inclusion Criteria: * Age 18 years and older at the time of signing the informed consent. * Part 1 Monotherapy: Participants with confirmed diagnosis of relapsed or refractory MF (primary, or post-PV and post-ET), MDS, MDS/MPN, or ET who have received at least 1 prior line of therapy; are either re...

Countries:United StatesCanadaChinaFinlandItalyJapanSpainUnited Kingdom
Unlock Eligibility Criteria

Frequently asked questions about INCB057643

What is INCB057643?

INCB057643 is an investigational small molecule being developed by Incyte Corporation for myelofibrosis and other advanced myeloid neoplasms. It is currently in Phase 1 clinical development and has not been approved by the FDA. The drug is being studied in a single active clinical trial.

What is INCB057643 used for?

INCB057643 is being studied for the treatment of myelofibrosis, including primary myelofibrosis, post-polycythemia vera myelofibrosis, and post-essential thrombocythemia myelofibrosis. The Phase 1 trial also enrolls patients with myelodysplastic syndrome, myelodysplastic/myeloproliferative neoplasm overlap syndrome, and other myeloproliferative neoplasms.

Who makes INCB057643?

INCB057643 is being developed by Incyte Corporation, which trades on the Nasdaq under the ticker symbol INCY. Incyte is the sponsor of the Phase 1 clinical trial evaluating the drug in patients with myelofibrosis and related myeloid neoplasms.

What phase is INCB057643 in?

INCB057643 is in Phase 1 clinical development. It is an investigational agent and has not received FDA approval. The single ongoing trial is a Phase 1 safety and tolerability study that is currently active but not recruiting participants.

What clinical trials is INCB057643 in?

INCB057643 is being evaluated in one clinical trial, NCT04279847, titled a safety and tolerability study in participants with myelofibrosis and other advanced myeloid neoplasms. The trial is Phase 1, active but not recruiting, and has an estimated enrollment of 140 participants across the United States, Canada, China, Finland, Italy, Japan, Spain, and the United Kingdom.

Who is eligible for the INCB057643 trial?

The NCT04279847 trial enrolls adults 18 years and older of any sex with myelofibrosis or other advanced myeloid neoplasms, including myelodysplastic syndrome and myeloproliferative neoplasms. Healthy volunteers are not eligible. The study is controlled but is not randomized or double blinded.