Study Links Microplastics in Spinal Fluid to ALS Risk

Researchers at the University of Modena and Reggio Emilia detected nano- and microplastics in the cerebrospinal fluid of patients with Amyotrophic Lateral Sclerosis, revealing a potential link between central nervous system contaminants and increased disease risk.

The international study, set for publication in Brain Communications under the title 'Central Nervous System Concentrations of Nano- and Microplastics and Risk of Amyotrophic Lateral Sclerosis,' compared particle levels in ALS patients against healthy individuals. Led by epidemiology professor Marco Vinceti and neurology professor Jessica Mandrioli, scientists found that particle concentrations exceeding a specific exposure threshold correlated with higher disease incidence.

The study marks the first time microscopic particles—some measuring just ten-thousandths of a millimeter—were identified and quantified within human spinal fluid. Scientists also analyzed the relationship between microplastic sizes in the bloodstream and their presence in the central nervous system, attempting to trace how environmental or dietary exposure leads to internal biological contamination.

Researchers emphasized that while the findings establish a notable correlation, current data does not confirm a direct cause-and-effect relationship. Possible mechanisms include direct neurotoxicity or indirect damage caused by harmful chemical substances adhering to the plastic particles.

"Whether and to what extent these new contaminants represented by nano and microplastics are responsible for toxic effects on the nervous system remains to be conclusively ascertained," said Marco Vinceti, Professor of Epidemiology at Unimore.

The investigation combined multi-disciplinary expertise, drawing on specialized environmental hygiene detection techniques developed at the University of Catania under professors Margherita Ferrante and Gea Oliveri Conti. The Catania team utilized a patented European method to measure trace levels of microplastics, integrating their findings with epidemiological input from Professor Lauren Wise of the Boston University School of Public Health.

Future research phases will evaluate larger population samples to refine particle size classifications and determine the exact biological pathways involved in central nervous system interaction.