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JNJ-88549968

Phase 1

Neoplasms | Small molecule | Oncology |Johnson & Johnson|Last Updated: Jul 31, 2026

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment241

FDA Designations

No designations recorded

Clinical trial landscape

JNJ-88549968 · 1 trial · 1 indication

Phase 1 1
NCT06150157A Study of JNJ-88549968 for the Treatment of Calreticulin (CALR)-Mutated Myeloproliferative NeoplasmsNeoplasms
RECRUITING241 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. 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 Sites39

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)

LOWJul 31, 2026NCT06150157lastUpdatePostDate: changed
LOWJul 31, 2026NCT06150157lastUpdatePostDate: changed
LOWJul 6, 2026NCT06150157Enrollment: 220 → 241
LOWJul 6, 2026NCT06150157Enrollment: 220 → 241

Frequently asked questions about JNJ-88549968

What is JNJ-88549968 used for?

JNJ-88549968 is an investigational small molecule being developed for the treatment of neoplasms, specifically calreticulin (CALR)-mutated myeloproliferative neoplasms. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

What does JNJ-88549968 target?

JNJ-88549968 targets calreticulin (CALR) mutations, which are associated with myeloproliferative neoplasms. By targeting these mutations, the drug aims to address the underlying driver of the disease in patients with CALR-mutated neoplasms.

Who makes JNJ-88549968?

JNJ-88549968 is being developed by Johnson & Johnson, a multinational pharmaceutical company listed on the New York Stock Exchange under the ticker symbol JNJ. The company is conducting clinical trials to evaluate the drug's safety and efficacy.

What phase is JNJ-88549968 in?

JNJ-88549968 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory agencies and is still undergoing clinical trials to assess its safety, tolerability, and preliminary efficacy in patients.

What clinical trials is JNJ-88549968 in?

JNJ-88549968 is being studied in a Phase 1 clinical trial with the identifier NCT06150157. This trial is recruiting participants with CALR-mutated myeloproliferative neoplasms and has an estimated enrollment of 241 patients across multiple countries, including the United States, Canada, China, and several European and Asian nations.

Is JNJ-88549968 the same as any other drug?

No alternative names for JNJ-88549968 have been reported. The drug is known solely by its investigational code name JNJ-88549968 and is being developed by Johnson & Johnson for the treatment of CALR-mutated myeloproliferative neoplasms.