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EUREKA grant to fund development of new 'optogenetic' technique for mapping neural networks at UMMS
Date:10/24/2013

WORCESTER, MA University of Massachusetts Medical School Assistant Professor of Biochemistry and Molecular Pharmacology Gang Han, PhD, has received a $1.3 million EUREKA (Exceptional Unconventional Research Enabling Knowledge Acceleration) grant from the National Institute of Mental Health to develop light activated nanoparticles that can be used to image live brain tissue. These novel nanoparticles will form the basis of a new "optogenetic" tool that promises to help researchers map and decode previously inaccessible neural circuitry deep in the brain using near infrared light. Insights gleamed from this breakthrough technique will further our understanding of the relationship between neural circuit activity, behavior and neuropsychiatric diseases. The co-investigators on the grant include Carlos Lois MD, PHD, professor of neurobiology and Yang Xiang, PhD, assistant professor of neurobiology.

Understanding how the activities of certain neurons help to mediate behavior and influence disease is a prominent challenge in treating neuropsychiatric disorders. Optogenetics is an emerging technique hoping to address this challenge. It combines recent breakthroughs in both optics and genetics to allow scientists to stimulate the activity of individual neurons in animal models. However, current optogenetic tools rely on fiber optic probes to transmit light and stimulate neurons in vivo. Because these probes have to be surgically inserted into the brain and attached to a power source their practical use in animal models is greatly impeded.

With the EUREKA grant, Dr. Han proposes to develop a wireless optogenetic technique using key advances his lab has made in lanthanide-doped upconversion nanoparticles (UCNPs). The advantage of these nanoparticles is that they can be turned on using low power, tissue-penetrating, near infrared radiation that is then converted to higher energy, visible light that can be seen through deep tissue. This means that they
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Contact: Jim Fessenden
james.fessenden@umassmed.edu
508-856-2000
University of Massachusetts Medical School
Source:Eurekalert

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