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DEC-205/NY-ESO-1 Fusion Protein CDX-1401

Phase 1

Acute Myeloid Leukemia | Monoclonal antibody | Oncology |Celldex Therapeutics, Inc.|Last Updated: Feb 27, 2026

Success Probability

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Trial Design

UNCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment8

FDA Designations

No designations recorded

Clinical trial landscape

DEC-205/NY-ESO-1 Fusion Protein CDX-1401 · 1 trial · 6 indications

Phase 1 1
NCT03358719DEC-205/NY-ESO-1 Fusion Protein CDX-1401, Poly ICLC, Decitabine, and Nivolumab in Treating Patients With Myelodysplastic Syndrome or Acute Myeloid LeukemiaAcute Myeloid Leukemia
COMPLETED8 Analytics
PHASE1COMPLETED
DEC-205/NY-ESO-1 Fusion Protein CDX-1401, Poly ICLC, Decitabine, and Nivolumab in Treating Patients With Myelodysplastic Syndrome or Acute Myeloid Leukemia
Acute Myeloid LeukemiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Proportion or Participants Experiencing a Dose-limiting Toxicity
Up to 180 days

Will evaluate the proportion of n=8 evaluable patients in the expansion cohort experiencing a dose-limiting toxicity. Toxicity rates will be described using upper 1-sided 95% Jeffreys binomial confidence intervals.

Secondary Endpoints

Immune Cell Profile
Up to 180 days
Peripheral Blood and Bone Marrow Cells Responses
Cycle 1- 4 weekly to EOT (up to 180 days from baseline)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Treatment (CDX-1401, poly ICLC, decitabine, nivolumab)EXPERIMENTALPatients receive 1mg/1.8mg DEC-205/NY-ESO-1 fusion protein CDX-1401 intracutaneously and poly ICLC SC on day -14, on day 15 of courses 1-4, and then on day 1 of every 4 courses thereafter. Patients also receive 3mg/kg nivolumab IV over 30 minutes on days 1 and 15 and 20 mg/m2 decitabine IV over 1 hour on days 1-5. Courses with nivolumab and decitabine repeat every 4 weeks in the absence of disease progression or unaccepted toxicity.

Interventions

NameTypeDescription
DEC-205/NY-ESO-1 Fusion Protein CDX-1401BIOLOGICALGiven intracutaneously
DecitabineDRUGGiven IV
Laboratory Biomarker AnalysisOTHERCorrelative studies
NivolumabBIOLOGICALGiven IV
Poly ICLCDRUGGiven SC
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Have a confirmed diagnosis of: * International Prognostic Scoring System (IPSS) intermediate-1, intermediate-2 or high-risk MDS including chronic myelomonocytic leukemia (CMML) OR * Low blast count AML with =\< 30% blasts previously classified as refractory anemia with ex...

Countries:United States
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Frequently asked questions about DEC-205/NY-ESO-1 Fusion Protein CDX-1401

What is DEC-205/NY-ESO-1 Fusion Protein CDX-1401 used for in Acute Myeloid Leukemia?

DEC-205/NY-ESO-1 Fusion Protein CDX-1401 is an investigational monoclonal antibody being studied for the treatment of Acute Myeloid Leukemia. It is also being evaluated in related conditions such as Myelodysplastic Syndrome and Chronic Myelomonocytic Leukemia. The drug is in Phase 1 clinical development and has not been approved by the FDA.

What does DEC-205/NY-ESO-1 Fusion Protein CDX-1401 target?

DEC-205/NY-ESO-1 Fusion Protein CDX-1401 targets the DEC-205 receptor and the NY-ESO-1 tumor antigen. The fusion protein is designed to deliver NY-ESO-1 to DEC-205-expressing dendritic cells, which may stimulate an immune response against cancer cells expressing NY-ESO-1.

Who makes DEC-205/NY-ESO-1 Fusion Protein CDX-1401?

DEC-205/NY-ESO-1 Fusion Protein CDX-1401 is being developed by Celldex Therapeutics, Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol CLDX. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with Acute Myeloid Leukemia and related blood cancers.

What phase is DEC-205/NY-ESO-1 Fusion Protein CDX-1401 in?

DEC-205/NY-ESO-1 Fusion Protein CDX-1401 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by the FDA for any use. The Phase 1 trial has been completed, and the drug remains under investigation for Acute Myeloid Leukemia and other hematologic malignancies.

What clinical trials is DEC-205/NY-ESO-1 Fusion Protein CDX-1401 in?

DEC-205/NY-ESO-1 Fusion Protein CDX-1401 has been studied in one completed Phase 1 clinical trial, registered as NCT03358719. The trial evaluated the drug in combination with Poly ICLC, Decitabine, and Nivolumab in patients with Myelodysplastic Syndrome or Acute Myeloid Leukemia. The study enrolled 8 participants in the United States.

Is DEC-205/NY-ESO-1 Fusion Protein CDX-1401 the same as CDX-1401?

Yes, DEC-205/NY-ESO-1 Fusion Protein CDX-1401 is also known as CDX-1401. The drug is a fusion protein that combines the DEC-205 antibody with the NY-ESO-1 tumor antigen, and it is being developed by Celldex Therapeutics for the treatment of Acute Myeloid Leukemia and other cancers.