Graphene quantum dots (GQDs), nanoscale carbon particles, have demonstrated the ability to interfere with the aggregation of misfolded proteins associated with neurodegenerative diseases such as Parkinson's and multiple system atrophy (MSA), according to a study published in the journal Science and Technology of Advanced Materials (STAM).
The buildup of α-synuclein (ASN) into toxic clumps is a hallmark of synucleinopathies, leading to progressive neuronal loss. Current treatments only manage symptoms rather than halting the underlying protein clumping, driving scientists to explore new strategies, including nanomaterials that can prevent aggregates or help clear them from the brain.
A multinational research team led by Professor Małgorzata Kujawska at the Poznań University of Medical Sciences in Poznań, Poland, used a multi-stage approach, testing GQDs in cell-free environments, neuronal cultures, and animal models of MSA. The researchers found that when GQDs were administered intranasally in mice, the particles significantly reduced the presence of toxic protein aggregates. Furthermore, the treatment appeared to activate autophagy, a biological recycling process that helps cells break down and remove damaged proteins.
“This study points to a promising new direction for strategies against neurodegenerative diseases,” says Professor Kujawska. “While clinical use of GQDs remains a long way off, these findings strengthen the case for further research.”
At concentrations relevant to its biological effects, the GQD showed a favorable safety profile, although some changes in cellular stress and immune responses were observed at higher doses. This is an important consideration, as many nanomaterials face hurdles in medical applications due to concerns over long-term biocompatibility.
While the results are promising, challenges remain, such as preventing quantum dots from clumping in liquid suspensions. “GQDs may serve as a useful research tool,” says Professor Kujawska. “What we learn as we optimize their properties and conduct a comprehensive safety evaluation could help design more effective nanomaterial-based strategies not just for synucleinopathies, but also for other conditions characterized by the buildup of toxic proteins.”
The open access journal STAM publishes outstanding research articles across all aspects of materials science, including functional and structural materials, theoretical analyses, and properties of materials.
