ImmunoCo Immune Co-culture Chip

ImmunoCo Immune Co-culture Chip is a specialized microfluidic platform designed for studying immune-tumor interactions in a physiologically relevant 3D microenvironment. The chip features an open culture chamber connected to a cell reservoir through a dedicated microchannel, enabling dynamic co-culture of tumor cells or organoids with immune cells (T cells, NK cells, macrophages) under conditions that mimic in vivo immune surveillance and tumor immune evasion.

The innovative open-top design facilitates easy introduction of multiple cell types, including complex mixtures such as tumor-infiltrating lymphocytes (TILs) or engineered cell therapies (CAR-T cells). The transparent imaging window supports real-time visualization of immune cell infiltration, tumor killing dynamics, and cell-cell interactions using fluorescence microscopy and time-lapse imaging.

The chip is manufactured from biocompatible materials with ultra-low autofluorescence to maximize imaging sensitivity. The SBS-standard format enables integration with high-content screening platforms and automated liquid handling systems. Each box contains 4 sterile chips compatible with standard CO2 incubators and imaging systems.

The ImmunoCo Immune Co-culture Chip enables multiple applications in immuno-oncology research:

1. **Immune Checkpoint Inhibitor Evaluation**: Assess anti-PD-1, anti-CTLA-4, and combination immunotherapy efficacy by monitoring T cell-mediated tumor killing in patient-matched tumor-immune co-cultures.

2. **CAR-T Cell Therapy Development**: Evaluate CAR-T cell potency, specificity, and persistence against tumor organoids in a 3D microenvironment that better recapitulates in vivo solid tumor targeting challenges.

3. **Tumor Microenvironment Modeling**: Study the suppressive effects of the tumor microenvironment on immune cell function, including hypoxia-driven immune evasion and immunosuppressive metabolite accumulation.

4. **Immune Cell Trafficking**: Model immune cell recruitment, adhesion, and infiltration into tumor tissue under inflammatory conditions using the dedicated migration channel.

5. **Combination Therapy Screening**: Test combinations of immunotherapies with chemotherapy, targeted therapy, or radiation to identify synergistic treatment strategies.

6. **Biomarker Discovery**: Identify predictive biomarkers of immunotherapy response by correlating in-chip killing data with clinical outcomes across patient-derived models.

7. **Personalized Immunotherapy Prediction**: Establish patient-specific tumor-immune co-cultures to predict individual responses to immunotherapy regimens before treatment initiation.

**ImmunoCo Setup Protocol:**

**Step 1: Tumor Cell / Organoid Establishment**
- Seed tumor cells (5x10^4 cells/well) or embed tumor organoids in the open culture chamber
- For 3D organoid culture, mix organoid fragments with 30-50% Matrigel before seeding
- Incubate at 37 C, 5% CO2 for 24-48 hours to allow tumor establishment
- Verify tumor cell viability and morphology before immune cell addition

**Step 2: Immune Cell Preparation**
- Isolate PBMCs from fresh blood using density gradient centrifugation
- For TIL studies, digest tumor tissue and isolate lymphocyte fractions
- For CAR-T studies, prepare engineered T cells according to your protocol
- Count and resuspend immune cells in complete medium at 1-2x10^6 cells/mL

**Step 3: Co-culture Setup**
- Add immune cells to the reservoir chamber (100-200 uL)
- Immune cells will migrate through the connecting channel to the tumor chamber
- For directed migration studies, add chemokines (CCL19, CXCL12) to the tumor chamber
- Incubate at 37 C, 5% CO2 for the desired duration (typically 3-7 days)

**Step 4: Real-Time Monitoring**
- Use fluorescence microscopy to monitor immune cell infiltration and tumor killing
- Capture time-lapse images at 2-4 hour intervals for kinetic analysis
- For endpoint analysis, perform live/dead staining (Calcein-AM/EthD-1)
- Collect supernatant for cytokine profiling (IFN-gamma, TNF-alpha, IL-2) by ELISA

**Step 5: Post-Experiment Analysis**
- Recover remaining cells for flow cytometry analysis of surface markers
- Perform immunofluorescence staining for granzyme B, perforin, and CD markers
- Extract RNA for transcriptomic analysis of immune activation markers
- Calculate killing efficiency from fluorescence imaging data