Tim Schallert (E-mail)
Tim’s CV (Word document, 164kb)
Lab phone: (512) 471-6141
Fax: (512) 232-4335
Tim Schallert received his
Ph.D. in Behavioral Neuroscience from
Research Interests
The brain and spinal cord
are vulnerable to traumatic injury, stroke, tumors and degenerative diseases,
often with devastating functional impairments, but at no time in the history of
medicine have scientists been as optimistic as they are now about treatment
strategies. Understanding how the central nervous system responds to the loss
of nerve cells, and how behavior can influence the mechanisms of brain repair,
is a major focus of our research.
We develop rat and mouse
models of neurological disorders and strive to improve upon existing models. We
have a multidisciplinary approach, with extensive collaborative arrangements
with experts in other labs on campus, nationally and internationally.
Collaborative research projects include searching for novel treatment
interventions.
In Parkinson’s disease
dopamine cells degenerate, eventually leading to severe impairments of
movement. Using a new model of slow degeneration, we have investigated gene
therapy, drugs and motor enrichment techniques that increase growth factors in
the brain. These growth factors appear to keep the dopamine cells from dying,
thereby preventing the behavioral dysfunction.
Whereas skilled motor
activity protects neurons, behavioral inactivity is detrimental. In cerebral
stroke, Parkinson’s disease, and other models of brain injury, physical
activity and inactivity hasve only recently been recognized as highly
influential. Behavior is often essential for cellular changes, synapse
formation and neurogenesis. We look for sensitive periods after brain damage
that provide unique opportunities to intervene beneficially.
We have helped to develop a
new model of brain cancer. Unlike other models used to examine anti-cancer
treatments, our model includes a highly sensitive behavioral analysis of brain
function and neural plasticity, which are often adversely affected by
traditional anti-cancer interventions. The hope is to use this model to find
treatments that can shrink brain tumors without disturbing mechanisms important
to optimal brain function. We also want to understand the stealth nature of
brain tumors. Tumor cells slowly activate key mechanisms of plasticity which
hide their presence despite ever more extensive encroachment on critical brain
tissue. In collaboration with investigators at the University of Michigan and
Henry Ford Neuroscience Center, we have developed promising chemical
interventions that, unlike traditional treatments, appear to stop mitotic
activity in tumor cells implanted in the striatum of the brain, without
interfering with mechanisms of recovery of function and with a beneficial
impact on behavioral outcome due to a positive effect on remaining tissue.