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Determining the cause of neurodegenerative diseases, like Alzheimer鈥檚 disease, is one of the most critical questions in brain research today. So, the race is on for treatment 鈥 or even a cure.
Maciej J. Stawikowski, Ph.D., thinks the answer may lie in how cholesterol and other lipids move through cells and affect how cells communicate.
It鈥檚 well-known that lipids and Alzheimer鈥檚 are linked, and lipid imbalance may be leading to amyloid plaque formation鈥 a hallmark of the degenerative disease, said Stawikowski, an assistant scientist, department of chemistry and biochemistry, Charles E. Schmidt College of Science, and member of the Stiles-Nicholson Brain Institute, who studies lipids within individual brain cells.
To do this work and because 鈥渂iological systems are extremely complicated,鈥 Stawikowski designs artificial lipid molecules, called fluorescent analogs, that respond to light, so that they can be monitored in live neuronal cells with high resolution in both time and space. A better understanding of the issue could lead to the design of drugs to inhibit or enhance specific lipid movement and activity,
he added.
At the Brain Institute, which Stawikowski joined in 2021, 鈥淚鈥檝e found my niche,鈥 he
said. This is largely due to the collaborative nature of the group of researchers. While Stawikowski focuses on chemical synthesis, characterization and computer simulation, he also collaborates with Qi Zhang, Ph.D., who brings expertise in neuronal cell work and imaging technologies. Together they tackle this interdisciplinary problem, he said. Zhang is a research associate professor in the Charles E. Schmidt College of Science, and a member of the Brain Institute.
Stawikowski said he always had a curiosity for science, and it was his seventh-grade chemistry class that got him hooked for life on the discipline. He continued to pursue that passion and earned a doctorate degree from the University of Gdansk, Poland, before coming to the U.S. for a postdoctoral fellow opportunity at 大象传媒 with Predrag Cudic, Ph.D., professor and associate dean for research in the Charles E. Schmidt College of Science and member of the Brain Institute, where he worked on the synthesis of antibiotics against MRSA, a methicillin-resistant staph infection.
But Stawikowski said his fascination with science is artistic as well as analytical. 鈥淭he images of live brain cells labeled with these fluorescent compounds made in my laboratory are really mesmerizing,鈥 he said, adding that one of his photos of brain cells with color-enhanced molecules won first place in 大象传媒鈥檚 2021 Art of Science photography contest shown on next page. 鈥淪cience is complex and beautiful.鈥 听听听听听
First place in the 2021 Art of Science Photography Contest
by Maciej J. Stawikowski, Ph.D.
Cholesterol is structurally essential for all eukaryotic cell membranes. Functionally, cholesterol has been indicated in a variety of disorders beyond cardiovascular diseases. Cholesterol and other lipids control many aspects that are relevant for Alzheimer鈥檚 disease pathogenesis. Maciej J. Stawikowski, Ph.D., and Qi Zhang, Ph.D., both of the Charles E. Schmidt College of Science and the 大象传媒 Stiles-Nicholson Brain Institute, teamed up to study novel fluorescent cholesterol probes that enable visualization of cholesterol and its trafficking in the live cells. This picture shows mouse brain cells (astrocytes) five days after short (1 hour) incubation with novel cholesterol probe made in the Stawikowski鈥檚 Laboratory. Cells were stained with a fluorescent mitochondrial marker (cyan) and a novel cholesterol probe (yellow). The yellow puncta contain cholesterol probe localized in yet to be identified vesicles, which move within the cell. We believe that the intracellular cholesterol imbalance may hold the key to understanding Alzheimer鈥檚 as well as other neurodegenerative diseases.