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KT-333

Phase 1

Non Hodgkin Lymphoma (NHL) | Small molecule | Oncology |Kymera Therapeutics, Inc.|Trials Updated: Mar 19, 2025

KT-333 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Feb 2022

KT-333 target and mechanism

Molecular targetSTAT3
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment56

FDA Designations

ORPHAN_DRUG

KT-333 clinical trials

KT-333 · 1 trial · 6 indications

Phase 1 1
NCT05225584Safety, PK, PD, Clinical Activity of KT-333 in Adult Patients With Refractory Lymphoma, Large Granular Lymphocytic Leukemia, Solid TumorsNon Hodgkin Lymphoma (NHL)
COMPLETED56 Analytics
PHASE1COMPLETED
Safety, PK, PD, Clinical Activity of KT-333 in Adult Patients With Refractory Lymphoma, Large Granular Lymphocytic Leukemia, Solid Tumors
Non Hodgkin Lymphoma (NHL)Unlock trial analytics

Study Endpoints

Primary Endpoints

Safety
Safety will be assessed from the time ICF signature through 30 days post dose or prior to start of a new anticancer therapy

Incidence and severity of adverse events as assessed by CTCAE v5.0 Phase 1a/1b

Maximum Tolerated Dose (MTD)
Within the first 28 days of treatment

To establish the Maximum Tolerated Dose (MTD) Phase 1a

Dose Limiting Toxicities (DLTs)
Within the first 28days of treatment

Number of Participants with protocol specified Dose Limiting Toxicities (DLTs) Phase 1a

Secondary Endpoints

Area under the plasma concentration versus time curve for KT-333
Blood samples for PK analysis collected at multiple visits during cycle 1 and cycle 2 (each cycle is 28days)
Maximum Plasma Concentration of KT-333 (Cmax)
Blood samples for PK analysis collected at multiple visits during cycle 1 and cycle 2 (each cycle is 28days)
Time of maximum plasma concentration of KT-333 (Tmax)
Blood samples for PK analysis collected at multiple visits during cycle 1 and cycle 2 (each cycle is 28days)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase 1a Dose Escalation LymphomasEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles
Phase 1a Dose Escalation Solid TumorsEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles
Phase 1b Dose Expansion PTCLEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles
Phase 1b Dose Expansion CTCLEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles
Phase 1b Dose Expansion LGL-LEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles
Phase 1b Dose Expansion Solid TumorEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles
Phase 1a Dose Escalation LGL-LEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles
Phase 1a Dose Escalation T-PLLEXPERIMENTALKT-333 dosed IV weekly in 28 day cycles

Interventions

NameTypeDescription
KT-333DRUGKT-333 will be supplied as 10mg/mL concentration frozen solution to be administered intravenously per the protocol defined frequency and dose level.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites13

Inclusion Criteria: 1. Phase 1a Only: Cytologically or pathologically confirmed Lymphomas (including Hodgkin's, B-cell, T-cell, Small Lymphocytic, or Natural-Killer (NK)-cell Lymphomas and LGL-L), T-PLL and solid tumors with the exception of chronic lymphocytic leukemia (CLL) Note: Patients with in...

Countries:United States
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Frequently asked questions about KT-333

What is KT-333?

KT-333 is an investigational small molecule developed by Kymera Therapeutics for the treatment of non Hodgkin lymphoma and other refractory blood cancers and solid tumors. It is a targeted protein degrader designed to act on STAT3. KT-333 is in Phase 1 clinical development and has received orphan drug designation from the FDA.

What is KT-333 used for in non Hodgkin lymphoma?

KT-333 is being studied for non Hodgkin lymphoma, including peripheral T-cell lymphoma and cutaneous T-cell lymphoma, as well as large granular lymphocytic leukemia, T-cell prolymphocytic leukemia, and solid tumors. It is intended for patients with refractory disease. KT-333 remains investigational and has not been approved for any indication.

What does KT-333 target?

KT-333 targets STAT3, a signaling protein that is frequently activated in certain lymphomas and leukemias. By binding STAT3 and directing it toward degradation, KT-333 is designed to reduce STAT3 protein levels rather than simply block its activity. This targeted protein degradation approach is the basis for its evaluation in refractory hematologic and solid tumors.

Who makes KT-333?

KT-333 is developed by Kymera Therapeutics, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker KYMR. Kymera is focused on targeted protein degradation therapeutics. KT-333 is one of the company's clinical-stage programs and is being evaluated in a company-sponsored Phase 1 study.

What phase is KT-333 in?

KT-333 is in Phase 1 clinical development. It is an investigational agent and has not been approved by the FDA for any indication. The FDA has granted KT-333 orphan drug designation. The Phase 1 trial evaluating KT-333 has been completed, and no active trials of KT-333 are currently listed.

What clinical trials is KT-333 in?

KT-333 has been evaluated in one Phase 1 clinical trial, NCT05225584, titled a study of the safety, pharmacokinetics, pharmacodynamics, and clinical activity of KT-333 in adult patients with refractory lymphoma, large granular lymphocytic leukemia, and solid tumors. The trial enrolled 56 patients in the United States and is completed.