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CLN-049

Phase 1/2

Relapsed/Refractory Acute Myeloid Leukemia (AML) | Biologics | Oncology |Cullinan Therapeutics, Inc.|Trials Updated: Oct 28, 2026

CLN-049 development status

Highest phase Phase 1/2
Registered trials 2 across 1 sponsor since Dec 2021

CLN-049 target and mechanism

Molecular targetFLT3
Target classProtein
ModalityBiologics

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials2
Total Enrollment365

FDA Designations

FAST_TRACKORPHAN_DRUG

CLN-049 clinical trials

CLN-049 · 2 trials · 4 indications

Phase 1/2 1Phase 1 1
NCT05143996CLN-049 in Patients With Relapsed/Refractory Acute Myeloid Leukemia (AML) or Myelodysplastic Syndrome (MDS)Relapsed/Refractory Acute Myeloid Leukemia (AML)
RECRUITING275 Analytics
PHASE1/PHASE2RECRUITING
CLN-049 in Patients With Relapsed/Refractory Acute Myeloid Leukemia (AML) or Myelodysplastic Syndrome (MDS)
Relapsed/Refractory Acute Myeloid Leukemia (AML)Unlock trial analytics

Study Endpoints

Primary Endpoints

Number of treatment emergent events (TEAEs)
28 days

TEAEs will be defined as adverse events that are reported for the first time following study drug administration for worsening of a pre-existing event after the first dose

Cmax of CLN-049
Up to 13 weeks

Maximum drug concentration

Ctrough of CLN-049
28 Days

The observed plasma concentration just prior to the beginning of, or at the end of a dosing interval

Tmax of CLN-049
28 Days

Time to Cmax

T1/2 of CLN-049
Up to 28 days

28 Days

Efficacy of CLN-049
Up to 13 weeks

CR (complete response) + CRh (complete remission with partial hematologic recovery) rate

Incidence and severity of adverse events (AEs)/adverse events of special interest (AESIs)/serious adverse events (SAEs) [safety and tolerability] of CLN-049 combined with azacitidine and venetoclax
48 weeks

Safety assessments include: body measurements, vital signs, physical exam, EGOG (measure of patient function in terms of self-care, daily activity, and physical ability) performance status, lab assessments, ECGs, and ECHO/MUGA (tests to evaluate heart function)

Determine recommended dose/schedule of CLN-049 in combination with azacitidine and venetoclax
48 weeks
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part A - Single ascending dose (SAD) design of IV administered CLN-049EXPERIMENTALPatients with relapsed/refractory AML or MDS will receive CLN-049 via IV administration
Part B - Multiple ascending dose (MAD) design of IV administered CLN-049EXPERIMENTALPatients with relapsed/refractory AML or MDS will receive CLN-049 via IV administration
Part C - Multiple ascending dose (MAD) design of SC administered CLN-049EXPERIMENTALPatients with relapsed/refractory AML or MDS will receive CLN-049 via SC injection
Part D - Phase 2 Dose Optimization and ExpansionEXPERIMENTALDose Optimization: patients will be randomized 1:1 to one of two dose regimens of CLN-049 via IV derived from doses tested during Part B (MAD-IV). Dose Expansion: patients will receive a single dose regimen of CLN-049 via IV as determined by Dose Optimization (RP2D).
Part E - Expansion of IV-administered CLN-049 in newly diagnosed AML patients with TP53 mutationsEXPERIMENTALNewly diagnosed, previously untreated AML patients with TP53 mutations will receive a single dose regimen of CLN-049 via IV as determined by Dose Optimization (RP2D).
Part A: Dose EscalationEXPERIMENTALNewly diagnosed AML patients treated with standard of care azacitidine and venetoclax in addition to CLN-049 in dose escalation cohorts
Part B: Dose ExpansionEXPERIMENTALNewly diagnosed AML patients treated with standard of care azacitidine and venetoclax in addition to CLN-049 at a dose determined in Part A (Dose Escalation)

Interventions

NameTypeDescription
CLN-049DRUG\[FLT3\] x \[CD3\] bispecific T cell engager
AzacitidineDRUGAzacitidine 75 mg/m2 will initially be administered sub-cutaneous or intravenous on days 1 through 7 of a 28-day cycle
VenetoclaxDRUGVenetoclax will initially be administered orally on days 1 through 28 of a 28-day cycle and then reduced to days 1 through 14 in consolidation cycles.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites17

Inclusion Criteria: 1. Aged ≥ 18 years of age. 2. Patient has a confirmed diagnosis of recurrent or refractory AML or MDS: Parts A, B, C: i. AML either de novo or secondary ii. MDS with at least 5% blasts that is relapsed after or refractory to hypomethylating agent (HMA) therapy iii. Patie...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMOct 28, 2026NCT05143996Enrollment: 60 → 275
LOWOct 28, 2026NCT07722767lastUpdatePostDate: changed
MEDIUMOct 28, 2026NCT05143996Enrollment: 60 → 275
LOWOct 28, 2026NCT07722767lastUpdatePostDate: changed

Frequently asked questions about CLN-049

What is CLN-049 used for?

CLN-049 is being developed for acute myeloid leukemia (AML), including relapsed or refractory AML, and for myelodysplastic syndrome (MDS), including TP53-mutated MDS and AML. It is an investigational small molecule in Phase 1 clinical development and has not been approved for any use.

What does CLN-049 target?

CLN-049 targets FLT3, a protein kinase. By acting on FLT3, CLN-049 is designed to address AML and MDS, including relapsed or refractory disease and TP53-mutated cases. It is a small molecule and is being studied both as a single agent and in combination regimens.

Who is developing CLN-049?

CLN-049 is being developed by Cullinan Therapeutics, Inc., which trades under the ticker CGEM. The company is running the Phase 1 program in the United States, including a study of CLN-049 in relapsed or refractory AML and MDS and a Phase 1b combination study in AML.

What phase is CLN-049 in?

CLN-049 is in Phase 1 clinical development. It is investigational and has not been approved by the FDA. The FDA has granted CLN-049 Fast Track and Orphan Drug designations. The program includes a recruiting Phase 1 study and a Phase 1b combination study that is not yet recruiting.

What clinical trials is CLN-049 in?

CLN-049 is studied in NCT05143996, a recruiting Phase 1 trial in relapsed or refractory AML and MDS, including TP53-mutated disease, with planned enrollment of 275. It is also in NCT07722767, a Phase 1b study of CLN-049 combined with azacitidine and venetoclax in AML, planned for 90 patients and not yet recruiting.

Is CLN-049 given with other treatments?

CLN-049 is being tested both as a single agent and in combination. The Phase 1b trial NCT07722767 evaluates CLN-049 in combination with azacitidine and venetoclax in patients with AML. The Phase 1 trial NCT05143996 studies CLN-049 in relapsed or refractory AML and MDS, including TP53-mutated MDS and AML.