During development, distinct subtypes of interneurons are produced according to regional subdivision of the basal forebrain. Olfactory bulb (OB) interneurons are produced by progenitors in the lateral ganglionic eminence (LGE), and cortical and striatal interneurons are produced by progenitors in the medial ganglionic eminence (MGE). The current proposal uses in vitro migration and differentiation assays to examine whether position in the LGE or the expression of LGE-enriched transcription factors regulate the genesis of OB interneurons. By grafting MGE cells into the LGE and LGE cells into the MGE, we will ask if extrinsic factors regulate the acquisition of cell fate. By misexpressing LGE-enriched factors (Er81, Gsh2, and Pax6) in MGE cells and MGE-enriched factors (Nkx2.1 and Lhx6) in LGE cells, we will determine whether regionally expressed transcriptional regulators modulate cell identity. Finally, we will assess the autonomy of Pax6 and Gsh2 in producing OB interneurons by analyzing the migration and differentiation of mutant cells. The long-term objective of the proposed study is to determine how autonomous and non-autonomous factors influence the production of unique subtypes of neurons in the mammalian forebrain.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32DC007047-03
Application #
7066605
Study Section
Special Emphasis Panel (ZRG1-F03A (20))
Program Officer
Sklare, Dan
Project Start
2004-06-01
Project End
2007-05-31
Budget Start
2006-06-01
Budget End
2007-05-31
Support Year
3
Fiscal Year
2006
Total Cost
$50,428
Indirect Cost
Name
University of North Carolina Chapel Hill
Department
Physiology
Type
Schools of Medicine
DUNS #
608195277
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
Tucker, Eric S; Segall, Samantha; Gopalakrishna, Deepak et al. (2008) Molecular specification and patterning of progenitor cells in the lateral and medial ganglionic eminences. J Neurosci 28:9504-18
Tucker, Eric S; Polleux, Franck; LaMantia, Anthony-Samuel (2006) Position and time specify the migration of a pioneering population of olfactory bulb interneurons. Dev Biol 297:387-401