Recent Updates
Recently added Catalysts

eftilagimod alpha

Phase 2

Breast Carcinoma | Monoclonal antibody | Oncology |Immutep Limited|Last Updated: Apr 22, 2026

Success Probability
Subscribe to view
Market & Valuation
Subscribe to view
Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment849
FDA Designations
FAST_TRACK
Clinical trial landscape

eftilagimod alpha · 3 trials · 3 indications

Phase 2 3
NCT05747794Study in Metastatic Breast Cancer Patients Receiving Eftilagimod Alpha or Placebo in Combination with Paclitaxel ChemotherapyBreast Carcinoma
ACTIVE NOT_RECRUITING849 Analytics
NCT04811027Combination Study With Eftilagimod Alpha (a Soluble LAG-3 Fusion Protein) and Pembrolizumab in Patients With Recurrent or Metastatic HNSCCHNSCC
COMPLETED171 Analytics
NCT03625323Combination Study With Soluble LAG-3 Fusion Protein Eftilagimod Alpha (IMP321) and Pembrolizumab in Patients With Previously Untreated Unresectable or Metastatic NSCLC, or Recurrent PD-X Refractory NSCLC or With Recurrent or Metastatic HNSCCNSCLC
COMPLETED187 Analytics
PHASE2ACTIVE NOT_RECRUITING
Study in Metastatic Breast Cancer Patients Receiving Eftilagimod Alpha or Placebo in Combination with Paclitaxel Chemotherapy
Breast CarcinomaUnlock trial analytics
PHASE2COMPLETED
Combination Study With Eftilagimod Alpha (a Soluble LAG-3 Fusion Protein) and Pembrolizumab in Patients With Recurrent or Metastatic HNSCC
HNSCCUnlock trial analytics
PHASE2COMPLETED
Combination Study With Soluble LAG-3 Fusion Protein Eftilagimod Alpha (IMP321) and Pembrolizumab in Patients With Previously Untreated Unresectable or Metastatic NSCLC, or Recurrent PD-X Refractory NSCLC or With Recurrent or Metastatic HNSCC
NSCLCUnlock trial analytics
Study Endpoints
Primary Endpoints
Determination of Overall survival (OS)
Until trial end, death, withdrawal of consent or lost to follow-up, assessed up to 60 months
Determination of the Optimal Biological Dose (OBD)
Up to 15 months
Frequency of adverse events (AEs)
Up to 15 months
Severity of adverse events (AEs)
Up to 15 months
Duration of adverse events (AEs)
Up to 15 months
Occurrence of dose-limiting toxicities (DLTs)
Up to 15 months
Occurrence of clinically relevant abnormalities in vital signs
Up to 15 months
Occurrence of clinically relevant abnormalities in physical examinations
Up to 15 months
Occurrence of clinically relevant abnormalities in 12-lead ECGs
Up to 15 months
Occurrence of clinically relevant abnormalities in safety laboratory assessments
Up to 15 months
Objective response rate (ORR) according to Response Evaluation Criteria in Solid Tumors (RECIST) 1.1
Up to 24 months
Evaluation of Objective Response Rate (ORR) According to iRECIST (Unconfirmed)
Data collected from screening until time of disease progression, death, lost to follow up, study discontinuation, whichever occurs first, assessed up to approximately 68 months

ORR was defined as the percentage of participants for each dose level whose best overall response is rated as iCR or iPR per immune Response Evaluation Criteria In Solid Tumors (iRECIST) for target lesions and assessed by CT or MRI. iCR was defined as disappearance of all target and non-target lesions and any pathological lymph nodes must be \<10 mm in the short axis. iPR was defined as at least a 30% decrease in the sum of the diameters of target lesions, taking as a reference, the baseline sum of the diameters.

Evaluation of Objective Response Rate (ORR) According to iRECIST (Confirmed)
Data collected from screening until time of disease progression, death, lost to follow up, study discontinuation, whichever occurs first, assessed up to approximately 68 months

ORR was defined as the percentage of participants for each dose level whose best overall response is rated as iCR or iPR per immune Response Evaluation Criteria In Solid Tumors (iRECIST) for target lesions and assessed by CT or MRI. iCR was defined as disappearance of all target and non-target lesions and any pathological lymph nodes must be \<10 mm in the short axis. iPR was defined as at least a 30% decrease in the sum of the diameters of target lesions, taking as a reference, the baseline sum of the diameters.

Secondary Endpoints
Determination of Progression Free Survival (PFS), based on RECIST, v1.1
Until occurrence of progressive disease, or the start of any further next line anticancer treatment, or until the end of the trial for any other reason, assessed up to 60 months
Evaluation of Objective Response Rate (ORR) based on RECIST v1.1
Until occurrence of progressive disease, or the start of any further next line anticancer treatment, or until the end of the trial for any other reason, assessed up to 60 months
Changes from baseline in quality of life (QOL) as assessed by questionnaire of European Organisation for Research and Treatment of Cancer (EORTC) QLQ-C30
Up to 13 months
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
open label lead-in (phase 2): eftilagimod alpha 30mg + paclitaxelEXPERIMENTALeftilagimod alpha 30mg s.c. + 80mg/m\^2 paclitaxel i.v. (same-day administration): The trial consists of a chemo-immunotherapy (chemo-IO) phase followed by an immunotherapy (IO)-phase. The chemo-IO phase consists of a planned 6 cycles of 4 weeks (28 days each) that may be longer or shorter depending on chemo tolerance. The IO-phase is planned to follow the chemo-IO phase. A maximum of 13 cycles (approx. 12 months) of treatment is planned.
open label lead-in (phase 2): eftilagimod alpha 90mg + paclitaxelEXPERIMENTALeftilagimod alpha 90mg s.c. + 80mg/m\^2 paclitaxel i.v. (same-day administration): The trial consists of a chemo-immunotherapy (chemo-IO) phase followed by an immunotherapy (IO)-phase. The chemo-IO phase consists of a planned 6 cycles of 4 weeks (28 days each) that may be longer or shorter depending on chemo tolerance. The IO-phase is planned to follow the chemo-IO phase. A maximum of 13 cycles (approx. 12 months) of treatment is planned.
Phase 3: eftilagimod alpha + paclitaxelEXPERIMENTALeftilagimod alpha s.c. (OBD) + 80mg/m\^2 paclitaxel i.v. (same-day administration): The trial consists of a chemo-immunotherapy (chemo-IO) phase followed by an immunotherapy (IO)-phase. The chemo-IO phase consists of a planned 6 cycles of 4 weeks (28 days each) that may be longer or shorter depending on chemo tolerance. The IO-phase is planned to follow the chemo-IO phase. A maximum of 13 cycles (approx. 12 months) of treatment is planned.
Phase 3: placebo + paclitaxelPLACEBO_COMPARATORplacebo s.c. + 80mg/m\^2 paclitaxel i.v. (same-day administration): The trial consists of a chemo-immunotherapy (chemo-IO) phase followed by an immunotherapy (IO)-phase. The chemo-IO phase consists of a planned 6 cycles of 4 weeks (28 days each) that may be longer or shorter depending on chemo tolerance. The IO-phase is planned to follow the chemo-IO phase. A maximum of 13 cycles (approx. 12 months) of treatment is planned.
(CPS ≥1): pembrolizumab (KEYTRUDA®) + eftiEXPERIMENTALeftilagimod alpha: 30 mg every 2 weeks for the first 4 cycles;thereafter every 3 weeks for up to 18 cycles (1 cycle = 6 weeks). pembrolizumab (KEYTRUDA®): 400 mg every 6 weeks for up to 18 cycles (1 cycle = 6 weeks).
(CPS ≥1): pembrolizumab (KEYTRUDA®)ACTIVE_COMPARATORpembrolizumab (KEYTRUDA®): 400 mg every 6 weeks for up to 18 cycles (1 cycle = 6 weeks).
(CPS <1): pembrolizumab (KEYTRUDA®) + eftiEXPERIMENTALeftilagimod alpha: 30 mg every 2 weeks for the first 4 cycles;thereafter every 3 weeks for up to 18 cycles (1 cycle = 6 weeks). pembrolizumab (KEYTRUDA®): 400 mg every 6 weeks for up to 18 cycles (1 cycle = 6 weeks).
1st line NSCLCEXPERIMENTALeftilagimod alpha: 30 mg every 2 weeks for the first 8 cycles (1 cycle = 3 weeks) and every 3 weeks thereafter (starting cycle 9). pembrolizumab (KEYTRUDA®): 200 mg every 3 weeks.
2nd line NSCLCEXPERIMENTALeftilagimod alpha: 30 mg every 2 weeks for the first 8 cycles (1 cycle = 3 weeks) and every 3 weeks thereafter (starting cycle 9). pembrolizumab (KEYTRUDA®): 200 mg every 3 weeks.
HNSCCEXPERIMENTALeftilagimod alpha: 30 mg every 2 weeks for the first 8 cycles (1 cycle = 3 weeks) and every 3 weeks thereafter (starting cycle 9). pembrolizumab (KEYTRUDA®): 200 mg every 3 weeks.
Interventions
NameTypeDescription
eftilagimod alphaBIOLOGICALAPC activator, MHC II agonist
PaclitaxelDRUGpaclitaxel will be given as standard of care (chemotherapy)
placeboOTHERplacebo matching eftilagimod alpha
pembrolizumab (KEYTRUDA®)DRUGanti-PD-1 antibody
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites22

Inclusion Criteria: * Metastatic HR+ positive (estrogen receptor positive and/or progesterone receptor positive) or hormone receptor negative (HR˗), and HER2-neg breast adenocarcinoma, histologically proven by biopsy on the last available tumor tissue * Participants with HR+ metastatic breast cance...

Countries:United StatesBelgiumGeorgiaMoldovaSpainAustraliaDenmarkGermanyRomaniaUkraineUnited Kingdom
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT05747794primaryCompletionDate: changed
LOWMay 24, 2026NCT05747794studyFirstPostDate: changed