In previous work I have demonstrated that brain essential fatty acid deficiency (EFAD) increases the sensitivity of rodents to a variety of volatile anesthetics and decreases their sensitivity to the volatile convulsant fluorothyl. Increased volatile anesthetic sensitivity was specifically reversed by a parenteral supplementation protocol (linoleic acid) that preferentially repleted the arachidonic acid content of cerebral cortical polyphosphoinositides. I propose to study the molecular mechanisms through which EFAD alters anesthetic/convulsant potency, and thus to gain insight into the molecular mechanisms of volatile anesthetic/convulsant action. To reach this goal, I propose three general areas of study: (1) To pursue my preliminary observations by studying the effects of brain EFAD and of volatile anesthetics/convulsants on the neurotransmitter-stimulated generation of phosphoinositide derived chemical second messengers (IP3, diacylglycerol, arachidonate metabolites). (2) To further characterize the model by determining the effects of EFAD on the potency of non-volatile anesthetics and convulsants and (3) To determine if EFAD alters the chemical interaction between anesthetics/convulsants and brain membranes using NMR spectroscopic techniques. The results of these three areas of investigation should provide new insights concerning the relationship(s) between whole animal anesthetic/convulsant effect, neuronal chemical composition and specific biochemical and/or physicochemical effects of anesthetics/convulsants.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
1R01GM037846-01
Application #
3293671
Study Section
Surgery, Anesthesiology and Trauma Study Section (SAT)
Project Start
1986-12-01
Project End
1991-11-30
Budget Start
1986-12-01
Budget End
1987-11-30
Support Year
1
Fiscal Year
1987
Total Cost
Indirect Cost
Name
Washington University
Department
Type
Schools of Medicine
DUNS #
062761671
City
Saint Louis
State
MO
Country
United States
Zip Code
63130
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Dubois, B W; Evers, A S (1992) 19F-NMR spin-spin relaxation (T2) method for characterizing volatile anesthetic binding to proteins. Analysis of isoflurane binding to serum albumin. Biochemistry 31:7069-76
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