Multi-potent progenitor cells raise great expectations for the treatment of neurological disorders and have generated considerable interest in the general field of medicine. A number of recent studies, including those from our laboratory (Wichertle et al. 1999), suggest that transplanted progenitors migrate considerable distances and differentiate into morphologically mature neurons in the host central nervous system. For example, progenitor cells derived from medial ganglionic eminence (MGE) have a unique ability to disperse, migrate, and differentiate into GABAergic interneurons in multiple adult brain regions. Although anatomical studies on transplanted progenitors suggest a mature neuronal morphology, the function of these neurons in a host brain remains unknown. In response to a recent NIH program announcement, in this proposal we will assess the ability of transplanted MGE progenitor cells to integrate in the host nervous system and modify a dysfunctional state e.g., epilepsy. Techniques will involve use of acute brain slices maintained in vitro, and application of visualized patch-clamp methods to study the physiological function of fluorescently-tagged transplanted MGE cells. Immunohistochemical and electron microscopy experiments will be performed to assess the phenotype of transplanted cells. Mutant mice exhibiting loss of cortical interneurons (uPAR-/-) or alterations in synaptic inhibition (GAD65-/-) will be used to evaluate whether transplanted MGE progenitor cells influence the development of acute seizure activity. In some studies, treatments will be performed to determine whether we can manipulate the percentage of MGE progenitor cells that will ultimately adopt a GABAergic phenotype.
Three specific aims are proposed: (i) to develop procedures for transplantation of MGE progenitors into the adult CNS, (ii) to determine whether MGE progenitors increase inhibitory (GABAergic) function in the adult CNS, and (iii) to assess the therapeutic potential of MGE progenitor grafts against rodent seizure models. Our results promise to provide new information about the function of transplanted MGE progenitors in a host brain and may provide a direct demonstration of the potential for progenitor cells to treat intractable forms of epilepsy. ? ?

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
3R01NS048528-01A1S1
Application #
7102324
Study Section
Clinical Neuroplasticity and Neurotransmitters Study Section (CNNT)
Program Officer
Fureman, Brandy E
Project Start
2005-02-03
Project End
2009-01-31
Budget Start
2005-02-03
Budget End
2006-01-31
Support Year
1
Fiscal Year
2005
Total Cost
$50,000
Indirect Cost
Name
University of California San Francisco
Department
Neurosurgery
Type
Schools of Medicine
DUNS #
094878337
City
San Francisco
State
CA
Country
United States
Zip Code
94143
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