Gadolinium contrast agents trigger mild danger-signal release in neuronal cells, hinting at immune activation
- Human SH-SY5Y neuroblastoma cells were exposed to a macrocyclic agent, a linear agent and free gadolinium chloride.
- Both chelated agents produced mild immunogenic cell death signals, including ATP and HMGB1 release and calreticulin relocation; free gadolinium did not.
- Linear agent uptake appeared clathrin-dependent. Findings come from a single in vitro cell line, limiting clinical inference.
💡 Points Based on the abstract
Mild DAMP release from both chelated agents, but not from free Gd, hints the intact complex is doing something, which is not what the free-ion toxicity story predicts. The catch is exposure: nobody has shown neurons see these concentrations behind an intact blood-brain barrier. Next step is a dose series against realistic brain levels, with primary neurons or microglia co-culture to test whether any signal propagates.