Abstract 2788: VB6-845d tumor cell killing elicits biologic features of immunogenic cell death
Bibliographic record
Abstract
Abstract VB6-845d is a Targeted Protein Therapeutic, TPT, that comprises a Fab fragment specific for the Epithelial Cell Adhesion Molecule (EpCAM) genetically fused to deBouganin via a furin protease sensitive linker. DeBouganin (deB) is a de-immunized variant of bouganin, a ribosome inactivating protein (RIP), that when internalized blocks protein synthesis thereby leading to cell death. While all cytotoxic molecules induce tumor cell killing, only some are capable of inducing biological manifestations indicative of immunogenic cell death (ICD). ICD is characterized by the collective appearance of distinct cellular changes termed damage associated molecular patterns, or DAMPs, which play a role in immune cell activation by triggering pro-inflammatory processes. Key DAMPs necessary for defining ICD are cell surface translocation of calreticulin, an endoplasmic reticulum chaperone protein, ATP secretion and release of HMGB1 (high mobility group box 1). To evaluate whether VB6-845d cell killing elicits the hallmark features of ICD, VB6-845d treated tumor cell lines were assessed for the presence of these distinct signaling molecules. In vitro studies showed that VB6-845d cytotoxicity induces the translocation of calreticulin to the cell surface as well as the release of ATP and HMGB1. The expression of other potential immune regulators following VB6-845d treatment was also examined. In summary, the data presented suggests that VB6-845d mediates tumor cell killing by an ICD pathway. The potential cross-priming effect initiated by VB6-845d-induced ICD suggests the use of VB6-845d in combination with immune checkpoint inhibitors may enhance their effectiveness in EpCAM-positive epithelial cancers. Citation Format: Rachelle L. Dillon, Shilpa Chooniedass, Arjune Premsukh, Glen C. MacDonald, Jeannick Cizeau, Gregory P. Adams. VB6-845d tumor cell killing elicits biologic features of immunogenic cell death [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 2788.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".