University of Arkansas
Ralph E. Martin Department of Chemical Engineering
3202 Bell Engineering Center
Fayetteville, AR 72701-1201
Phone: (479) 575-4951
Fax: (479) 575-7926
Christa Hestekin
Investigation of early stage protein aggregation using microchannel electrophoresis
Early stage protein aggregation has been implicated in a variety of diseases in includeing
alzheimer's disease and diabetes. Alzheimer's Disease (AD) is a complex and devastating
neurodegenerative disease. Currently, AD is believed to progress from harmless amyloid
beta (Aβ) monomers through a nucleation step to oligomeric species and then larger
aggregates. There is a need to develop a technique that can detect the aggregation
of early species (oligomers) at physiological concentrations with rapid analysis times.
Microchannel electrophoresis offers an attractive approach for detecting low concentration,
transient species that may be key to the development of Alzheimer’s disease. The
Hestekin lab has previously explored the use of microchannel electrophoresis to investigate
the effects of solution conditions and sample preparation on the oligomeric, pre-beta
sheet aggregates. The lab is currently focused on investigating changes to the primary
sequence that alter the protein’s aggregation in an effort to understand the driving
mechanism. The information gleaned from these studies could be used to enhance drug
design. In addition, the conditions for physiological detection of protein aggregates
using fluorescent labels as well as the separation and identification of individual
oligomeric species are also being explored.