It is the purpose of this 5-year program to investigate molecular mechanisms involved in arterial chemoreception during postnatal development. In particular, the hypothesis that the net result of neurotransmission in arterial chemoreceptors is inhibitory and, as such, produces unstable ventilation will be tested. It is further proposed that the lack of the induction of immediate-early genes in cells of the chemoreceptor neural pathway (i.e., carotid bodies, petrosal ganglia, NTS and hypoglossal) by excitatory stimuli will serve as a marker of this inhibition. The applicant will use in situ hybridization histochemistry: a) to characterize the distribution of neurotransmitters and their receptors in cells of the carotid bodies and petrosal ganglia; b) to determine the effect of development on the induction of the immediate-early gene in cells of the chemoreceptor neural pathways; and c) to determine the effects of acute and chronic receptor agonists and antagonists on gene expression in response to peripheral and central chemoreceptor activation (via hypoxia).

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Minority School Faculty Development Awards (K14)
Project #
5K14HL003365-05
Application #
6030362
Study Section
Special Emphasis Panel (ZHL1-CCT-L (F1))
Project Start
1995-07-01
Project End
2000-06-30
Budget Start
1999-07-01
Budget End
2000-06-30
Support Year
5
Fiscal Year
1999
Total Cost
Indirect Cost
Name
Johns Hopkins University
Department
Pediatrics
Type
Schools of Medicine
DUNS #
045911138
City
Baltimore
State
MD
Country
United States
Zip Code
21218