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NTLA-2002

Phase 3

Hereditary Angioedema | Monoclonal antibody | Immunology |Intellia Therapeutics, Inc.|Last Updated: Jul 29, 2026

Target and mechanism

Molecular targetKLKB1
ModalityMonoclonal antibody

Also known as Biological NTLA-2002

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment117

FDA Designations

RMATORPHAN_DRUG

Clinical trial landscape

NTLA-2002 · 2 trials · 1 indication

Phase 3 1Phase 1 1
NCT06634420HAELO: A Phase 3 Study to Evaluate NTLA-2002 in Participants With Hereditary Angioedema (HAE)Hereditary Angioedema
ACTIVE NOT_RECRUITING80 Analytics
PHASE3ACTIVE NOT_RECRUITING
HAELO: A Phase 3 Study to Evaluate NTLA-2002 in Participants With Hereditary Angioedema (HAE)
Hereditary AngioedemaUnlock trial analytics

Study Endpoints

Primary Endpoints

Time-normalized number of Investigator-confirmed HAE attacks
From Week 5 through Week 28
Safety and tolerability of NTLA-2002 as determined by adverse events (AEs) and dose limiting toxicities (DLTs)
From NTLA-2002 infusion up to week 104 post-infusion

(Phase 1 only)

Number of HAE attacks per month (Weeks 1-16)
From study drug infusion up to week 16 post-infusion

(Phase 2 only)

Secondary Endpoints

Time-normalized number of Investigator-confirmed HAE attacks requiring on-demand treatment
From Week 5 through Week 28
Time-normalized number of moderate or severe Investigator-confirmed HAE attacks
From Week 5 through Week 28
Investigator-confirmed HAE attack-free status
From Week 5 through Week 28
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Arm A: NTLA-2002ACTIVE_COMPARATORArm A: NTLA-2002 (50 mg; single IV infusion)
Arm B: PlaceboPLACEBO_COMPARATORArm B: Placebo (saline; single IV infusion)
Phase 1 Study ArmEXPERIMENTALParticipants assigned to 1 of 3 dose-escalation cohorts will receive a single dose of NTLA-2002 on Day 1 and will then be followed for 104 weeks. Primary observation period is 16 weeks.
Phase 2 Experimental Study ArmEXPERIMENTALParticipants randomized to NTLA-2002 (2 dose levels), will receive a single dose of NTLA-2002 on Day 1 and will then be followed for 104 weeks. Primary observation period is 16 weeks.
Phase 2 Placebo Comparator Study ArmPLACEBO_COMPARATORParticipants randomized to placebo will receive IV normal saline on Day 1 and will then be followed for up to 104 weeks. Primary observation period is 16 weeks.
Placebo Crossover and Follow-On Dosing Substudy ArmEXPERIMENTALParticipants assigned to this Substudy Arm (participants who previously received either 25mg or placebo only) will have the opportunity to receive a single dose of NTLA-2002 (50mg) and will then be followed for 52 weeks.

Interventions

NameTypeDescription
NTLA-2002BIOLOGICALCRISPR/Cas9 gene editing system delivered by lipid nanoparticle (LNP) for intravenous (IV) administration
Normal Saline IV AdministrationBIOLOGICALThe administration of intravenous (IV) normal saline
Biological NTLA-2002BIOLOGICALCRISPR/Cas9 gene editing system delivered by LNP for IV administration
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Eligibility Criteria

Age Range16 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites29

Inclusion Criteria: 1. Age ≥16 years 2. Clinical history consistent with HAE-C1INH-Type 1 or -Type 2 3. Ability to provide evidence of HAE attacks (confirmed by the Investigator) to meet the screening requirement 4. Must agree to refrain from the use of long-term prophylactic therapies from the sta...

Countries:United StatesAustraliaCanadaFranceGermanyNetherlandsNew ZealandSouth AfricaUnited Kingdom
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Recent Changes (Last 90 Days)

LOWJul 29, 2026NCT06634420lastUpdatePostDate: changed
LOWJul 29, 2026NCT06634420lastUpdatePostDate: changed

Frequently asked questions about NTLA-2002

What is NTLA-2002 used for in Hereditary Angioedema?

NTLA-2002 is an investigational therapy being developed for the treatment of Hereditary Angioedema (HAE), a genetic condition characterized by recurrent episodes of severe swelling. It is currently being evaluated in a Phase 3 clinical trial for this indication.

What does NTLA-2002 target?

NTLA-2002 targets the KLKB1 gene, which encodes plasma kallikrein, a protein involved in the inflammatory pathway that leads to swelling attacks in Hereditary Angioedema. By targeting KLKB1, the therapy aims to reduce the production of kallikrein and thereby prevent angioedema attacks.

Who is developing NTLA-2002?

NTLA-2002 is being developed by Intellia Therapeutics, Inc., a biopharmaceutical company. Intellia is publicly traded on the Nasdaq stock exchange under the ticker symbol NTLA.

What phase is NTLA-2002 in?

NTLA-2002 is currently in Phase 3 clinical development. It is an investigational therapy and has not yet been approved by regulatory authorities. The drug has received FDA designations including Regenerative Medicine Advanced Therapy (RMAT) and Orphan Drug designation.

What clinical trials is NTLA-2002 in?

NTLA-2002 is being studied in the HAELO trial (NCT06634420), a Phase 3, randomized, double-blind, placebo-controlled study in participants with Hereditary Angioedema. The trial is active but not recruiting, with an enrollment of 80 participants across multiple countries including the United States, Australia, and several European nations.

Is NTLA-2002 the same as any other drug?

NTLA-2002 is the primary name for this investigational therapy. No alternative names have been reported for this drug candidate in the available information.