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CDX-622

Phase 1

Healthy Participants | Small molecule | Other |Celldex Therapeutics, Inc.|Last Updated: Jul 2, 2026

Target and mechanism

Molecular targetTSLP
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment85

FDA Designations

No designations recorded

Clinical trial landscape

CDX-622 · 2 trials · 2 indications

Phase 1 2
NCT07330778A Study of CDX-622 in Participants With Mild to Moderate AsthmaMild to Moderate Asthma
RECRUITING12 Analytics
NCT06650761A Phase I Study of CDX-622Healthy Participants
COMPLETED85 Analytics
PHASE1RECRUITING
A Study of CDX-622 in Participants With Mild to Moderate Asthma
Mild to Moderate AsthmaUnlock trial analytics
PHASE1COMPLETED
A Phase I Study of CDX-622
Healthy ParticipantsUnlock trial analytics

Study Endpoints

Primary Endpoints

To evaluate the safety and tolerability profile of CDX-622 in adults with mild to moderate asthma.
Day 1 up to Day 85 (12 weeks)

Occurrence and incidence of Treatment-Emergent Adverse Events (TEAE) and serious adverse events during the study.

Safety as assessed by Toxicity Grading Scale for Healthy Adult and Adolescent Volunteers Enrolled in Preventive Vaccine Trials. Infusion reactions will be graded according to Common Terminology Criteria for Adverse Events (CTCAE) v5.0.
Day 1 up to Day 127

To evaluate the safety profile as determined by the incidence of adverse events in single or multiple ascending doses of CDX-622 or placebo comparator in healthy participants.

Secondary Endpoints

Change from baseline in fractional exhaled nitric oxide (FeNO) through week 12.
Day 1 up to Day 85 (12 weeks)
Change from baseline in absolute eosinophil count (AEC) through week 12.
Day 1 up to Day 85 (12 weeks)
Change from baseline through week 12 in serum biomarkers.
Day 1 up to Day 85 (12 weeks)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
CDX-622EXPERIMENTALEligible participants will receive a single dose
Normal SalinePLACEBO_COMPARATOREligible participants will receive doses of Normal Saline by IV or SC

Interventions

NameTypeDescription
CDX-622DRUGAdministered Intravenously
Normal SalineDRUGUp to 4 infusions or 6 SC injections of normal saline
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites4

Key Inclusion Criteria: 1. Males and females, ≥ 18 years of age 2. Diagnosis of mild to moderate asthma for at least 12 months 3. Pre-bronchodilator forced expiratory volume in 1 second (FEV1) ≥ 70% of predicted normal 4. Airway reversibility ≥ 12% and 200 mL improvement in FEV1 5. Both males and f...

Countries:United States
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Recent Changes (Last 90 Days)

LOWJul 2, 2026NCT07330778startDate: changed
LOWJul 2, 2026NCT07330778startDate: changed
LOWJul 2, 2026NCT07330778startDate: changed

Frequently asked questions about CDX-622

What is CDX-622 used for?

CDX-622 is an investigational small molecule being developed by Celldex Therapeutics for mild to moderate asthma. It is currently in Phase 1 clinical trials, including a completed study in healthy participants and an ongoing study in patients with mild to moderate asthma.

What does CDX-622 target?

CDX-622 targets TSLP, a cytokine involved in inflammatory responses. By targeting TSLP, CDX-622 is being studied for its potential role in treating mild to moderate asthma.

Who makes CDX-622?

CDX-622 is being developed by Celldex Therapeutics, Inc., a biopharmaceutical company traded under the ticker symbol CLDX. The company is conducting Phase 1 clinical trials for this investigational drug.

What phase is CDX-622 in?

CDX-622 is in Phase 1 clinical development. It is not yet approved by the FDA and remains investigational. The drug is being studied in healthy participants and in patients with mild to moderate asthma.

What clinical trials is CDX-622 in?

CDX-622 is being studied in two Phase 1 trials. NCT06650761, a completed study in healthy participants with 85 enrolled, and NCT07330778, a recruiting study in patients with mild to moderate asthma with 12 participants. Both trials are randomized, double-blind, and placebo-controlled.

Is CDX-622 the same as TSLP inhibitors?

CDX-622 is a small molecule that targets TSLP, making it a TSLP inhibitor. However, it is a distinct investigational drug developed by Celldex Therapeutics and is not the same as other TSLP-targeting therapies.