MicroArray Microarray Chip

MicroArray Microarray Chip is a high-density microfluidic platform designed for uniform spheroid and organoid culture in a 96-well plate compatible format. The chip features an array of U-bottom microwells (256-1,024 wells per chip) that promote self-assembly of single, size-controlled spheroids from seeded cell suspensions. The standardized format enables seamless integration with high-content screening systems and automated liquid handling platforms.

Each microwell is precision-engineered to accommodate a single spheroid (100-500 um diameter), ensuring uniform size distribution (CV <15%) across the entire array. The optically transparent bottom supports high-resolution fluorescence imaging, brightfield microscopy, and automated image acquisition. The chip material exhibits ultra-low compound binding, ensuring accurate drug concentration maintenance during screening campaigns.

The MicroArray chip is compatible with a wide range of cell types including cancer cell lines, primary cells, patient-derived organoids, and iPSC-derived cells. The 96-well plate footprint enables processing of 4 chips per plate, yielding over 1,000 individual spheroids per plate for large-scale screening applications. Each box contains 4 sterile chips with a 12-month shelf life.

The MicroArray Microarray Chip enables multiple applications in 3D cell biology and drug discovery:

1. **High-Throughput Drug Screening**: Generate 1,000+ uniform spheroids per plate for large-scale compound library screening with 3D culture relevance superior to 2D assays.

2. **Patient-Derived Organoid Drug Sensitivity Testing**: Culture patient tumor organoids in microwells for parallel testing of multiple treatment regimens to guide personalized therapeutic decisions.

3. **Combination Drug Matrix Screening**: Test drug pair combinations across concentration gradients to identify synergistic interactions in 3D tumor models.

4. **Tumor Spheroid Biology Research**: Study spheroid formation, growth kinetics, necrotic core development, and drug penetration in controlled, reproducible 3D microenvironments.

5. **Radiation Biology Studies**: Assess radiation sensitivity of tumor spheroids with clinically relevant fractionation schemes in a miniaturized format.

6. **Metabolic Profiling**: Monitor metabolic adaptation of spheroids under nutrient-limited conditions relevant to the tumor microenvironment.

7. **AI-Assisted Image Analysis**: Integration with CellVision scanner enables automated spheroid detection, segmentation, and morphological classification using deep learning algorithms.

**MicroArray Chip Setup Protocol:**

**Step 1: Cell Preparation**
- Harvest cells from culture and count using Trypan Blue exclusion
- Prepare single-cell suspension at optimal density (1,000-5,000 cells per microwell)
- For organoids, mechanically disrupt to 50-150 um fragments and count
- Resuspend in complete medium (add 2-5% Matrigel for organoid embedding if needed)

**Step 2: Cell Seeding**
- Remove chip from sterile packaging in a biosafety cabinet
- Add 50-100 uL of cell suspension to each chip well
- Centrifuge plate at 200 x g for 3 minutes to sediment cells into microwells
- Incubate at 37 C, 5% CO2 for 24-48 hours to allow spheroid formation

**Step 3: Medium Exchange**
- Carefully aspirate medium from chip wells without disturbing spheroids
- Add 100 uL of fresh pre-warmed medium per well
- Repeat medium exchange every 2-3 days throughout the culture period

**Step 4: Drug Treatment**
- Prepare drug dilution series in complete medium
- Replace culture medium with drug-containing medium (100 uL per well)
- For combination studies, prepare drug mixtures at specified ratios
- Incubate for desired treatment duration (typically 3-7 days)

**Step 5: Endpoint Analysis**
- For viability: Add CellTiter-Glo 3D reagent and measure luminescence
- For live/dead: Stain with Calcein-AM (2 uM) and EthD-1 (4 uM) for 30 min, then image
- For imaging: Transfer chip to microscope or CellVision scanner for automated acquisition
- For RNA/protein: Pool spheroids from replicate wells and extract using standard methods