Ethanol-Exposed Organoid Reanalysis
ConductScreen pipeline detects substance-induced morphological changes in published data without parameter adjustment
Study Source
Adams JW et al. Impact of alcohol exposure on neural development and network formation in human cortical organoids. Mol Psychiatry 28, 1571-1584 (2023). DOI
Why This Matters for ConductScreen
Our Phase 1 data demonstrates that ConductScreen discriminates genetic disease models from wildtype (27/48 significant comparisons). But the target context of use is detecting substance-induced changes. This reanalysis bridges that gap: applying the same pipeline to published ethanol exposure data shows it detects chemical perturbation — even from figure-extracted images at small N.
Automated Segmentation of External Images
The ConductScreen pipeline processed Adams et al. Figure 1b images without parameter adjustment. Green contours show automated segmentation boundaries.
Control (N=4)
Ethanol (N=5)
Circle size proportional to organoid area (px²). Control mean: 4,237 px² • Ethanol mean: 3,011 px² (↓29%). Green contour overlays available on live server.
Key Findings
Ethanol-exposed organoids show consistent size reduction across multiple morphological features.
Area
-29%
p = 0.085
Trend toward smaller organoids (directional evidence)
Perimeter
-21%
p = 0.049*
Statistically significant reduction in boundary length
Equiv. Diameter
-17%
p = 0.085
Shape-independent size reduction confirms growth arrest
Circularity
+11%
p = 0.219
Trend toward rounder shapes, potentially reflecting reduced complexity
Feature-by-Feature Comparison
Mann-Whitney U tests (two-sided) comparing control vs. ethanol-exposed organoids. All spatial measurements in pixel units (calibration unknown).
| Feature | Control (N=4) | Ethanol (N=5) | Change | p-value |
|---|---|---|---|---|
| Area(px²) | 4237.1 ± 962.7 | 3010.6 ± 1128.4 | -28.9% | 0.085 |
| Perimeter(px) | 258.4 ± 11.6 | 204.8 ± 38.2 | -20.8% | 0.049 * |
| Circularity | 0.8 ± 0.1 | 0.9 ± 0.0 | +10.7% | 0.219 |
| Equiv. Diameter(px) | 72.9 ± 9.0 | 60.8 ± 11.6 | -16.6% | 0.085 |
| Major Axis(px) | 74.4 ± 7.1 | 61.2 ± 11.5 | -17.7% | 0.085 |
| Solidity | 1.0 ± 0.0 | 1.0 ± 0.0 | +2.6% | 0.623 |
* Statistically significant at p < 0.05. Mann-Whitney U test (two-sided, uncorrected). Small N — interpret as directional evidence.
Consistency with Published Findings
Adams et al. Report
“Ethanol exposure led to growth arrest, reduced neuronal differentiation, and disrupted network formation in cortical organoids.”
ConductScreen Detects
Area ↓29%, Perimeter ↓21% (p=0.049), Equivalent Diameter ↓17% — quantitative confirmation of growth arrest using automated morphological analysis.
Pipeline generalization: No parameters were adjusted between the primary analysis (Schröter et al. iOrganBio data) and this external validation (Adams et al. data). The same segmentation and feature extraction pipeline processes both datasets identically.
Limitations & Caveats
- Images extracted from published figure, not original raw microscopy
- Pixel calibration unknown — all spatial measurements in pixel units, not μm
- Small sample size (N=4 control, N=5 ethanol) — interpret as directional evidence
- Single ethanol concentration (~20 mM steady-state)
- No dose-response relationship assessable from this dataset
What Phase 2 Adds
Phase 2 replaces this proof-of-concept reanalysis with a purpose-built validation study: