Stroke is the leading cause of adult disability. Stroke is produced both by direct blockade of blood flow and by hemorrhage. Intracerebral hemorrhage is the second leading cause of stroke. Intracerebral hemorrhage (ICH) has even less proportionate recovery than non-hemorrhagic stroke. However, in ICH there is a limited process of initial recovery and regaining of lost brain function. The mechanisms of functional recovery in ICH have not been studied. This application will determine the mechanisms for the formation of new connections and recovery in the brain after ICH. In non-hemorrhagic stroke, new connections are formed in the first month after the stroke, a process termed post-stroke axonal sprouting. The PI on this application proposal and other labs have identified the molecular mechanisms for axonal sprouting after stroke, and the association of axonal sprouting with functional recovery. The proposed studies will use newly developed techniques to identify the new patterns of connections that form in the motor system after ICH, the gene systems that mediate this axonal sprouting, and the causal link between axonal sprouting and functional recovery mediated through these gene systems, so as to determine molecules that may serve as therapeutic targets for neural repair in this disease.

Public Health Relevance

Intracerebral hemorrhage is the second leading cause of stroke in the United States, and the most severe cause of stroke-related disability. There have been no studies on the mechanisms of re-connection and repair in the brain after intracerebral hemorrhage. The studies in this application will determine how the brain reconnects after stroke, the molecules that mediate this reconnection, and begin to identify potential new repair therapies for this disease.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
1R01NS077521-01A1
Application #
8371168
Study Section
Acute Neural Injury and Epilepsy Study Section (ANIE)
Program Officer
Koenig, James I
Project Start
2012-05-01
Project End
2017-04-30
Budget Start
2012-05-01
Budget End
2013-04-30
Support Year
1
Fiscal Year
2012
Total Cost
$336,875
Indirect Cost
$118,125
Name
University of California Los Angeles
Department
Neurology
Type
Schools of Medicine
DUNS #
092530369
City
Los Angeles
State
CA
Country
United States
Zip Code
90095
Kathirvelu, Balachandar; Carmichael, S Thomas (2015) Intracerebral hemorrhage in mouse models: therapeutic interventions and functional recovery. Metab Brain Dis 30:449-59
Overman, Justine J; Carmichael, S Thomas (2014) Plasticity in the injured brain: more than molecules matter. Neuroscientist 20:15-28
Barratt, Harriet E; Lanman, Tyler A; Carmichael, S Thomas (2014) Mouse intracerebral hemorrhage models produce different degrees of initial and delayed damage, axonal sprouting, and recovery. J Cereb Blood Flow Metab 34:1463-71