General Information

Cytotoxic T cell

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Cytotoxic T cells, or CD8+ cytotoxic T cells, as a major component of tumor-infiltrating lymphocytes (TILs), play a central role in antitumor immunity alongside CD4⁺ helper T cells. By isolating and expanding patient-derived TILs and integrating them with cancer organoids, we recreate an immune-active tumor microenvironment to evaluate anticancer agents in a human-relevant context.
Organism
Product Type

Tissue

Disease

Applications

  • Cancer Organoid: Colorectal Cancer, Non-Small Cell Lung Cancer, Pancreatic Cancer, Breast Cancer, Cholangiocarcinoma, Gastric Cancer, Ovarian Cancer

Characteristics

Evaluation of the efficacy of an immunotherapeutic agent targeting cytotoxic T cells is possible by co-culturing specific organoids with Primed Cytotoxic T cells, allowing for the selective elimination of particular organoids. This provides a solution for assessing the effectiveness of immunotherapeutic agents targeting cytotoxic T cells in co-culture with cancer organoids.

Principle

PD L1 binds to PD 1 and inhibits T cell kiling of tumor cell
Blocking PD L1 or PD 1 allows T cell kiling of tumor cell
The efficacy of atezolizumab was evaluated under co-culture conditions combining tumor organoids with tumor-infiltrating lymphocytes (TILs) or peripheral blood – derived T cells. Higher levels of tumor organoid killing were observed in cultures lacking TILs or T cells, highlighting the influence of immune – tumor interactions on drug response.
The approach of assessing anticancer efficacy within a co-culture of tumor organoids and tumor-infiltrating lymphocytes remains at the research stage globally. Lambda Biologics holds unique patents and offers commercialization-ready platforms for this methodology, advancing the translational study of immunotherapeutic efficacy in a human-relevant tumor microenvironment.

Read out

Organoid-Based Immunotherapy Evaluation for Anticancer drugs
Our advanced platform introduces a new approach to drug development, enabling clinicians and researchers to move beyond the binary classification of responders and non-responders. It allows a detailed examination of patient-specific responses to approved control drugs at varying concentrations. This technology reveals the complex interplay among genetic, regional, and environmental factors and their influence on drug efficacy, providing a pathway to address critical unmet needs before clinical trials.
This example showcases the potential utility of our platform in identifying optimal partners for combination therapy with Immune Checkpoint Inhibitors (ICIs). The research suggests that Combination B could be a more effective strategy in enhancing the efficacy of ICIs. This platform is designed to facilitate such discoveries, offering a clear pathway to improve clinical outcomes through strategic drug pairing.

Frequently Asked Questions

What are Cytotoxic T Cells (CD8+ T cells)?
Cytotoxic T cells, also known as CD8+ T cells, are a subset of immune cells responsible for identifying and eliminating cancerous or virus-infected cells. They recognize antigens presented by MHC class I molecules and induce apoptosis through perforin- and granzyme-mediated mechanisms.
Cytotoxic T cells play a central role in evaluating tumor immunogenicity and the efficacy of immunotherapies. They are widely used in co-culture assays with tumor organoids or spheroids to study immune infiltration, T cell activation, and cytotoxic response in a human-relevant context.
Lambda Biologics provides functionally validated cytotoxic T cells compatible with patient-derived organoid and tumor microenvironment models. These cells enable dynamic assessment of tumor–immune interactions, supporting preclinical evaluation of checkpoint inhibitors and next-generation immunotherapies.

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