A Phase 1/2 interventional study of intratumoral injection of autologous CD1c (BDCA-1)+ myDC and Intratumoral injection of ipilimumab and AS01b in Solid Tumor and Metastases to Soft Tissue, sponsored by Universitair Ziekenhuis Brussel. Active, not recruiting at 1 site in Belgium. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-29.
Sponsored by Universitair Ziekenhuis Brussel · Phase 1/2, Interventional, and Treatment
This phase II trial aims at investigating the role and effect of autologous CD1c (BDCA-1)+ myeloid dendritic cells in combination with intratumoral injection of the CTLA-4 blocking monoclonal antibody (mAb) ipilimumab and the immunoligand AS01B compared to a combinatorial immunotherapy regimen using intratumoral injection of the CTLA-4 blocking monoclonal antibody (mAb) ipilimumab and the immunoligand AS01B. Concomitantly, nivolumab (a PD-1 blocking mAb) will be administered intravenously in both arms.
This phase II trial aims at investigating the role and effect of autologous CD1c (BDCA-1)+ myeloid dendritic cells in combination with intratumoral injection of the CTLA-4 blocking monoclonal antibody (mAb) ipilimumab and the immunoligand AS01B compared to a combinatorial immunotherapy regimen using intratumoral injection of the CTLA-4 blocking monoclonal antibody (mAb) ipilimumab and the immunoligand AS01B. Concomitantly, nivolumab (a PD-1 blocking mAb) will be administered intravenously in both arms.
CD1c (BDCA-1)+ myeloid dendritic (myDC) cells will be obtained by immunomagnetic isolation from PBMC obtained by leukapheresis. The CD1c (BDCA-1)+ myDC will not be substantially manipulated prior to autologous intratumoral injection, immediately following the isolation and concentration (isolation and administration will be performed in the same procedure). The investigators consider that the isolation represents a non-substantial manipulation of this somatic cell therapy product. The intended use of CD1c (BDCA-1)+ myDC in this clinical protocol is to enrich their presence within the injected metastasis where they should execute their physiological role of coordinating the anti-tumor immune response. Based on recent preclinical data, absence of myeloid dendritic cells in the tumor microenvironment is an important immune escape mechanism of malignant tumors.
Universitair Ziekenhuis Brussel is the lead sponsor of 362 studies on the registry; 103 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
IT injection of MyDC, ipilimumab and AS01b + IV nivolumab
Drug: intratumoral injection of autologous CD1c (BDCA-1)+ myDC · Drug: Intratumoral injection of ipilimumab and AS01b · Drug: IV nivolumab
IT injection of ipilimumab and AS01b + IV nivolumab
Drug: Intratumoral injection of ipilimumab and AS01b · Drug: IV nivolumab
intratumoral injections plus intravenous administration
Intratumoral injection of ipilimumab and AS01b
Also known as: intratumoral injection of ipilimumab and AS01B, intravenous nivolumab, intratumoral injection of ipilimumab and avelumab, intravenous nivolumab
Nivolumab administered intravenously
Also known as: Nivolumab intravenous administration
Incidence and severity of Treatment-related Adverse Events graded according to CTCAE of intratumoral injection of autologous CD1c (BDCA-1)+ myDC plus AS01B and ipilimumab in combination with IV nivolumab
Participants with treatment-related adverse events will be assessed by Common Terminology Criteria for Adverse Events (CTCAE) Version 5.0
Time frame: 1 year
To assess the therapeutic efficacy and toxicity of the AS01B adjuvants in combination with systemic PD-1 blockade and intratumoral CTLA-4 inhibition plus intratumoral administration of CD1c (BDCA-1)+ / CD141 (BDCA-3)+ myDC co-product in patients
1-year progression free survival (PFS) rate following randomization.
Time frame: 1 year
Feasibility of treatment strategy
Percentage of study patients that can receive the planned CD1c (BDCA-1)+ / CD141(BDCA-3)+ myDC intratumoral injection.
Time frame: 1 year
Objective response rate (ORR) of intratumoral injected CD1c (BDCA-1)+ myDC, avelumab, and ipilimumab plus iv nivolumab
Objective response rate (ORR, defined as the percentage of subjects with a confirmed complete response (CR), or partial response at any time per Response Evaluation Criteria in Solid Tumors (RECIST), version 1.1
Time frame: 1 year
Treatment disposition
Number/volume of administered CD1c (BDCA-1)+ / CD141 (BDCA-3)+ myDC Administered dose of AS01, ipilimumab, and nivolumab
Time frame: 1 year
Anti-tumor activity
Tumor response (ORR) according to RECISTv1.1 and iRECIST Tumor response and duration of response of CD1c (BDCA-1)+ / CD141 (BDCA-3)+ myDC, AS01, and ipilimumab injected and non-injected metastases (reported descriptively)
Time frame: 1 year
Duration of response (DOR)
Duration of response of CD1c (BDCA-1)+ / CD141 (BDCA-3)+ myDC, AS01B and ipilimumab in injected and non-injected metastases (reported descriptively)
Time frame: 1 year
Progression-free survival (PFS)
Time from first study treatment administration to progression of disease according to RECISTv1.1 and iRECIST (and possibly itRECIST)
Time frame: 1 year
Overall survival
Time from first study treatment administration to death
Time frame: 1 year
Effect on cellular- and molecular characteristics of the tumor microenvironment during/following study treatment
Immunohistochemical analysis (CD3, CD8, CD4, PD-L1), multiplexed immunofluorescent imaging, and RNA-expression profiling (NanoString PanCancer IO 360 gene expression panel) of repetitive on-treatment tissue biopsies/FNA of injected metastases T-cell receptor repertoire in metastases assessed by ImmunoSEQ analysis
Time frame: 1 year
Effect of study treatment on blood lymphocytes
Peripheral blood differential white blood cell counts Immunocytochemical differential cell counts (incl. CD3+, CD4+ and CD8+ lymphocytes) T-cell receptor repertoire assessed by ImmunoSEQ analysis Flow cytometric analysis of effector/naïve/memory T cells
Time frame: 1 year
Plan to share: No
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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Universitair Ziekenhuis Brussel