Cell Painting picks up LDH nanoparticle effects below the viability-assay threshold
- Al–Ni, Al–Co and Al–Cu layered double hydroxide nanoparticles were tested in skin, lung, gut and fibroblast cell models.
- Toxicity depended strongly on metal composition and cell type, with Al–Cu the most cytotoxic overall.
- Live Cell Painting detected changes in acidic vesicles, nuclear texture and granularity at concentrations where viability assays showed nothing, and separated the three formulations.
💡 Points Based on the abstract
The useful message for any safety group is that MTT-type viability readouts miss early perturbation, so phenotypic profiling belongs earlier in tox screening. Missing is the link to consequence: do the sub-cytotoxic phenotypes predict adverse outcomes, and are they driven by dissolved metal ions or by the particle? Ion-release controls would settle that.
📄 Paper · Chemical Research in Toxicology ↗ Layered Double Hydroxide Nanoparticles Induce Composition-Dependent Cytotoxic and Phenotypic Effects in Mammalian Cells