Trial Outcomes & Findings for DPX-Survivac and Checkpoint Inhibitor in DLBCL (NCT NCT03349450)

DPX-Survivac and Checkpoint Inhibitor in DLBCL

Objective Response Rate is the combined Complete Response (CR) and Partial Response (PR) rates using Cheson Criteria (2007) for evaluation. Site Qualified Investigators use radiological reports to calculate the decrease in tumour size from baseline at protocol specified time points.

Completing response assessment post radiology using the Cheson criteria

time lapse between current and next treatment

Waterfall analysis is describing visually the participants best clinical response using the Modified Cheson Criteria (2007) and irRC (immune related response criteria). This includes Complete (CR), Partial (PR), Stable disease (SD) and Progressive Disease (PD). Participants are then categorized by their PD-L1 bio-marker response to show their tumour size decrease (in %) from baseline to their best response. Overall Response Rate (ORR) = CR+PR. Disease Control Rate (DCR) = CR+PR+SD.

Safety will be assessed through patient reported and investigator observed Adverse Events (AE's) and graded using CTCAE version 4.03. This will also include physical examination and clinical laboratory tests. Specific attention will be placed upon injection site reactions and potential immune mediated AE's. Reporting will be on all AE's, regardless of relatedness, causality or severity and will include and AE's recorded from the time of participant consent to 30 days after treatment completion, resolution or lost-to-follow-up. Injection site reactions will be documented as grades of erythema, induration, pain, edema, ulceration or other. See Adverse Event section below for details.

Therapy with DPX-Survivac is expected to increase the frequency and activity of survivin-specific anti-tumour T cells. Survivin-peptide specific T cell immune response will be measured by methods such as ELISpot assay to enumerate T cells that produce molecules associated with anti-tumour immune responses such as IFN-γ and/or Granzyme-B. Additional immunological assays such as MHC-peptide multimer staining for survivin-specific CD8+ T cells, or multi-parametric flow cytometry for antigen-activated T cells and their phenotypes may also be performed for select subjects. Other exploratory immunologic assessments may be performed on frozen PBMC samples and subject plasma/serum if a novel method becomes available during the course of the study.

Therapy with DPX-Survivac is expected to increase the frequency and activity of survivin-specific anti-tumour T cells. Survivin-peptide specific T cell immune response will be measured by methods such as ELISpot assay to enumerate T cells that produce molecules associated with anti-tumour immune responses such as IFN-γ and/or Granzyme-B. Additional immunological assays such as MHC-peptide multimer staining for survivin-specific CD8+ T cells, or multi-parametric flow cytometry for antigen-activated T cells and their phenotypes may also be performed for select subjects. Other exploratory immunologic assessments may be performed on frozen PBMC samples and subject plasma/serum if a novel method becomes available during the course of the study.

Tumour-specific T cells must migrate to the tumour site to mediate anti-tumour activity. We will quantitate changes in T cell infiltration and the expression profile of this T cells in tumour sites before and during treatment.

This will be determined at a later date