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JNJ-88549968

Phase 1

Neoplasms | Small molecule | Oncology |Johnson & Johnson|Trials Updated: Sep 25, 2026

JNJ-88549968 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Nov 2023

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment300

FDA Designations

No designations recorded

JNJ-88549968 clinical trials

JNJ-88549968 · 1 trial · 1 indication

Phase 1 1
NCT06150157A Study of JNJ-88549968 for the Treatment of Calreticulin (CALR)-Mutated Myeloproliferative NeoplasmsNeoplasms
RECRUITING300 Analytics
PHASE1RECRUITING
A Study of JNJ-88549968 for the Treatment of Calreticulin (CALR)-Mutated Myeloproliferative Neoplasms
NeoplasmsUnlock trial analytics

Study Endpoints

Primary Endpoints

Part 1, Part 1b (US Only): Number of Participants With Dose Limiting Toxicity (DLT)
Approximately up to 35 days after first dose of study treatment

Number of participants with DLT will be reported. The DLTs are specific adverse events and are defined as any of the following: high grade non-hematologic toxicity, or hematologic toxicity. For US only: A DLT is any adverse event attributed to study treatment that meets the criteria for severity and duration and that occurs during the evaluation periods unless it can be incontrovertibly attributed to disease or other extraneous cause such as an accident.

Part 1, 2, Part 1b (US Only), Part 2b (US Only): Number of Participants with Adverse Events (AEs)
Up to 2 years

An AE is any untoward medical occurrence in a participant participating in a clinical study that does not necessarily have a causal relationship with the pharmaceutical/biological agent under study.

Part 1, 2, Part 1b (US Only), Part 2b (US Only): Number of Participants with Adverse Events (AEs) by Severity
Up to 2 years

An adverse event is any untoward medical occurrence in a clinical study participant that does not necessarily have a causal relationship with the pharmaceutical/biological agent under study. Severity will be graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 5.0. Severity scale ranges from grade 1 (mild) to grade 5 (death). Grade 1= mild, Grade 2= moderate, Grade 3= severe, Grade 4= life-threatening and Grade 5= death related to adverse event. Cytokine release syndrome (CRS) and associated neurologic toxicity events (immune effector cell-associated neurotoxicity syndrome events \[ICANS\]) will be graded according to the American Society for Transplantation and Cellular Therapy (ASTCT) guidelines.

Secondary Endpoints

Part 1, 2, Part 1b (US Only), Part 2b (US Only): Serum Concentration of JNJ-88549968
Up to 2 years
Part 1, 2, Part 1b (US Only), Part 2b (US Only): Number of Participants With Presence of Anti-Drug Antibodies to JNJ-88549968
Up to 2 years
Part 1, 2, Part 1b (US Only), Part 2b (US Only): Overall Response Rate
Up to 2 years
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose Escalation (Part 1), Dose Expansion (Part 2) and Part 1b (US only), Part 2b (US only)EXPERIMENTALIn dose escalation (Part 1), participants will receive JNJ-88549968. For myelofibrosis (MF) participants only, the study will explore a Phase 1b cohort in which the janus kinase (JAK) inhibitor ruxolitinib or momelotinib is started in combination with JNJ-88549968. The dose will be escalated sequentially to determine the recommended phase 2 dose (RP2D) and optimal dosing schedule (s) based on safety, pharmacokinetic, pharmacodynamic, and preliminary assessment of efficacy across several dose regimens. Additional Cohorts may be added to assess different formulation or delivery methods. In dose expansion (Part 2, Part 2b \[US only\]), participants will receive JNJ-88549968 at the RP2D regimen(s) determined in dose escalation (Part 1, Part 1b \[US only\]).

Interventions

NameTypeDescription
JNJ-88549968DRUGJNJ-88549968 will be administered.
RuxolitinibDRUGFor US sites: Ruxolitinib will be administered for participants with MF only.
MomelotinibDRUGFor US sites: Momelotinib will be administered for participants with MF only.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites44

Inclusion Criteria: * Be greater than or equal to (\>=) 18 years of age (or the legal age of majority in the jurisdiction in which the study is taking place, whichever the greater) at the time of informed consent * Positive for a calreticulin (CALR) driver mutation of essential thrombocythemia (ET)...

Countries:United StatesCanadaChinaFranceGermanyIsraelItalyJapanSpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWSep 25, 2026NCT06150157lastUpdatePostDate: changed
LOWSep 25, 2026NCT06150157lastUpdatePostDate: changed
LOWSep 10, 2026NCT06150157Enrollment: 241 → 300
LOWSep 10, 2026NCT06150157Enrollment: 241 → 300
LOWJul 31, 2026NCT06150157lastUpdatePostDate: changed
LOWJul 31, 2026NCT06150157lastUpdatePostDate: changed

Frequently asked questions about JNJ-88549968

What is JNJ-88549968?

JNJ-88549968 is an investigational small molecule being developed by Johnson & Johnson for the treatment of calreticulin (CALR)-mutated myeloproliferative neoplasms, a group of blood cancers. It is in Phase 1 clinical development and is designed for patients with this specific biomarker-defined disease.

What is JNJ-88549968 used for?

JNJ-88549968 is being studied for the treatment of calreticulin (CALR)-mutated myeloproliferative neoplasms, which fall under the broader category of neoplasms. It is an investigational therapy and has not been approved for any indication. The Phase 1 study enrolls adults aged 18 years and older.

Who is developing JNJ-88549968?

JNJ-88549968 is being developed by Johnson & Johnson, which trades on the New York Stock Exchange under the ticker JNJ. The company is running the Phase 1 program for the asset in CALR-mutated myeloproliferative neoplasms.

What phase is JNJ-88549968 in?

JNJ-88549968 is in Phase 1 clinical development. It is an investigational small molecule and has not been approved by the FDA or any other regulatory agency. One Phase 1 trial is currently active and recruiting participants.

What clinical trials is JNJ-88549968 in?

JNJ-88549968 is being evaluated in one Phase 1 trial, NCT06150157, titled A Study of JNJ-88549968 for the Treatment of Calreticulin (CALR)-Mutated Myeloproliferative Neoplasms. The trial is recruiting up to 300 participants across the United States, Canada, China, France, Germany, Israel, Italy, Japan, Spain, and the United Kingdom.

Is JNJ-88549968 biomarker selected?

Yes. JNJ-88549968 is being studied in a biomarker-selected population, specifically patients with calreticulin (CALR)-mutated myeloproliferative neoplasms. The Phase 1 trial NCT06150157 enrolls adults 18 years and older of all sexes and does not include healthy volunteers.