Disruptions of hindbrain development are implicated in multiple human disorders that cause significant morbidity and mortality such as Chiari malformations, sudden infant death syndrome and autism. The Math1 gene encodes a basic helix-loop-helix transcription factor whose function is necessary for the creation of multiple neuronal subtypes in the developing hindbrain, including those involved in breathing control. My proposal seeks to understand how Math1 contributes to normal hindbrain development in an effort to better understand derangements that cause serious neurodevelopmental human conditions. My goal is to determine how spatial and temporal cues specify the cellular fates of Math1-lineal cells derived from the rhombic lip.
The Specific Aims of the project are to 1) disrupt Math1 function in a spatially restricted manner to define the sites of origin of various rhombic lip derivatives; 2) determine the time of origin of Math1-lineal cells; and 3) selectively eliminate Math1-dependent cell populations based on time of origin. I will use conditional knockout systems to test the hypothesis that disruption of Math1 in a spatial- or time-dependent manner causes deletion of specific subsets of neurons, resulting in different phenotypes depending on the cell groups that are affected. This strategy will allow me to construct a spatial and temporal fate map of the murine rhombic lip, pinpoint neurons essential for breathing control, and evaluate physiological and behavioral consequences resulting from loss of specific neuronal subsets in the hindbrain. My overall career goal is to become an independent physician/scientist who focuses on understanding congenital neurological abnormalities. I will spend the majority of my time running a basic research laboratory, but I will also see a select group of patients with brain malformations. My ultimate goal is to characterize and identify genes that are responsible for these abnormalities in the hopes of better understanding what causes them and how they may be effectively prevented or treated, if possible. Baylor College of Medicine provides the perfect environment for my success. My mentor, Dr. Huda Zoghbi, is an internationally known physician/scientist with a tremendous training record. Departmental support of my research career, interaction with a Scientific Advisory Committee, and formal coursework at Baylor and elsewhere will also help me to achieve my goals. ? ?

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Clinical Investigator Award (CIA) (K08)
Project #
5K08NS053419-02
Application #
7188627
Study Section
NST-2 Subcommittee (NST)
Program Officer
Gwinn, Katrina
Project Start
2006-03-01
Project End
2011-02-28
Budget Start
2007-03-01
Budget End
2008-02-29
Support Year
2
Fiscal Year
2007
Total Cost
$171,450
Indirect Cost
Name
Baylor College of Medicine
Department
Pediatrics
Type
Schools of Medicine
DUNS #
051113330
City
Houston
State
TX
Country
United States
Zip Code
77030
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Maricich, Stephen M; Aqeeb, Kaashif A; Moayedi, Yalda et al. (2011) Pontocerebellar hypoplasia: review of classification and genetics, and exclusion of several genes known to be important for cerebellar development. J Child Neurol 26:288-94
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Morrison, Kristin M; Miesegaes, George R; Lumpkin, Ellen A et al. (2009) Mammalian Merkel cells are descended from the epidermal lineage. Dev Biol 336:76-83
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