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News — GRAND RAPIDS,聽Mich. (April 16, 2024)聽鈥� A new study from scientists offers a first look into the complex molecular changes that occur in brain cells with Lewy bodies, which are key pathological hallmarks of Parkinson鈥檚 disease and some dementias.

The findings, , reveal that brain cells with Lewy bodies exhibit a specific gene expression pattern akin to a disease-related fingerprint.

鈥淲e鈥檝e long known that Lewy bodies play a role in Parkinson鈥檚 and other neurodegenerative diseases but there are still many unanswered questions. Why are some cells more susceptible to Lewy bodies than others? How do Lewy bodies actually affect cells?鈥� said VAI Assistant Professor , the study鈥檚 corresponding author. 鈥淥ur findings are an important starting point for better understanding how cells respond to Lewy bodies, which is an area of great potential for informing new therapies.鈥�

Lewy bodies are clumps of misshapen proteins that are believed to disrupt healthy cellular function and contribute to cell death in neurodegenerative disorders such as Parkinson鈥檚 and Lewy body dementia. Loss of these vital cells contributes to disease symptoms.

Thanks to recent technological advances, in particular a new technique called spatial transcriptomics, Henderson and his team were able to compare brain cells with Lewy bodies to brain cells without Lewy bodies in deep detail. The pattern they identified includes genes that affect many critical processes required for brain health, including cellular communication, energy regulation, cellular trash removal, and inflammation. The study included preclinical models and cells from people with Parkinson鈥檚.

鈥淥ur findings support the idea that cells with Lewy bodies affect other cells and processes in the brain,鈥� Henderson said. 鈥淢oving forward, we plan to explore the molecular pathways disrupted by Lewy bodies to identify mechanisms that may be protective.鈥�

Authors include Thomas M. Goralski, M.S., Lindsay Meyerdirk, M.S., Libby Breton, M.S., Laura Brasseur, Kevin Kurgat, Daniella DeWeerd, Lisa Turner, Katelyn Becker, M.S., and Marie Adams, M.S., of VAI; and Daniel Newhouse, Ph.D., of NanoString Technologies. VAI鈥檚 Bioinformatics and Biostatistics Core, Genomics Core, Optical Imaging Core, Pathology and Biorepository Core, and Vivarium Core contributed to this research. This work would not have been possible without the individuals and families who donated tissue. Brain tissue was provided through Banner Sun Health Research Institute Brain and Body Donation Program.

Research reported in this publication was supported by Aligning Science Across Parkinson鈥檚 under award no. ASAP-020616 (PI: Thomas Biederer, Ph.D., Yale University [subaward to Michael Henderson, Ph.D.]) and the National Institute on Aging of the National Institutes of Health under award no. R01AG077573 (Henderson). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health or other funders.

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ABOUT VAN ANDEL INSTITUTE Van Andel Institute (VAI) is committed to improving the health and enhancing the lives of current and future generations through cutting edge biomedical research and innovative educational offerings. Established in Grand Rapids, Michigan, in 1996 by the Van Andel family, VAI is now home to more than 500 scientists, educators and support staff, who work with a growing number of national and international collaborators to foster discovery. The Institute鈥檚 scientists study the origins of cancer, Parkinson鈥檚 and other diseases and translate their findings into breakthrough prevention and treatment strategies. Our educators develop inquiry-based approaches for K鈥�12 education to help students and teachers prepare the next generation of problem-solvers, while our Graduate School offers a rigorous, research-intensive Ph.D. program in molecular and cellular biology. Learn more at .