Subhojit Roy, MD, PhD

Pathology and Laboratory Medicine
1111 Highland Avenue
Rm 5533 (WIMR II)
Madison, WI 53705
Focus Groups: 
PhD in Anatomy and Cell Biology, Temple University School of Medicine, Philadelphia, PA
Research Summary: 
Cell Biology of neuronal trafficking in physiology and neurodegenerative diseases
Research Detail: 
Due to their complex geometry and finite sites of bulk protein synthesis (perikarya), neurons have evolved elaborate transport and trafficking machineries to deliver proteins into axons and dendrites. How are somatically-synthesized proteins delivered to their appropriate sites, and then retained there (for example at the synaptic terminals)? Knowledge into the biology of this process is critical for determining neuronal form and function; and also to understand how these processes go awry in disease. 
A general approach in the lab is to develop accurate cellular models of normal and abnormal biological phenotypes – using dissociated neurons from mice, drosophila neurons in-vivo, 3-D organoids, and induced pluripotent stem cells (iPSC's; see for list of publications). Current projects include novel uses of CRISPR-Cas9 technology in cellular model-systems of neurodegenerative diseases – particularly Alzheimer’s disease; development and application of new tools (including super-resolution microscopy and optogenetics) to explore axonal transport and intricacies of the neuronal cytoskeleton (particularly actin); and use of iPSC’s to explore human cell biology. A guiding philosophy in the lab is to use whatever tools are needed to explore the question at hand, and whenever necessary, build new ones.
The lab has ongoing collaborations with researchers at the Wisconsin Institute for Discovery (WID), the Waisman Center, the Wisconsin Alzheimer’s Center, as well as several other investigators at UW-Madison; and is located on state of the art laboratory and office space overlooking Lake Mendota (within the Wisconsin Institute for Medical Research or WIMR-II tower.
Selected Publications: 
Wang L, Das U, Scott DA, Tang Y, McLean PJ, Roy S. "α-synuclein multimers cluster synaptic vesicles and attenuate recycling." Curr. Biol.. 2014;24(19):2319-26.
Das U, Scott DA, Ganguly A, Koo EH, Tang Y, Roy S. "Activity-induced convergence of APP and BACE-1 in acidic microdomains via an endocytosis-dependent pathway." Neuron. 2013;79(3):447-60.
A G, Y T, L W, et al. "A dynamic formin-dependent deep F-actin network in axons." Journal of Cell Biology. 2015;210(3):401-417.
Das U, Wang L, Ganguly A, et al. "Visualizing APP and BACE-1 approximation in neurons yields insight into the amyloidogenic pathway." Nat. Neurosci.. 2016;19(1):55-64.
Ganguly A, Tang Y, Wang L, et al. "A dynamic formin-dependent deep F-actin network in axons." J. Cell Biol.. 2015;210(3):401-17.