The hypothesis upon which this competitive renewal application is bases states that neuropeptides play a role in homeostatic regulatory mechanisms in the human, and that aberrations in those neuropeptidergic pathways exist in a variety of pathophysiological conditions. We propose to identify and quantify peptides produced by the opioid (proenkephalins A and B, proopiomelanocortin=POMC) and tachykinin pathways in human tissues and fluids. The use of a combination of powerful state-of-the-art analytical methodologies (RP-HPLC, RIA, RRA, FAB-MS-MS) that maximize both the detection sensitivity and molecular specificity in the study of human pathophysiological conditions is a unique aspect of our proposed research. To test experimentally our hypothesis, we propose to: 1. acquire human tissues and fluids rapidly and treat those samples to minimize metabolic interconversions; 2. measure the levels of individual peptides in control versus the stressed and pathophysiological conditions; 3. determine the primary structure of the measured peptide in order to be able to identify the endogenous peptides with a high degree of molecular specificity, and; 4. measure the levels of peptide precursors of the individual peptides through the use of enzyme and chemical techniques followed by subsequent measurement of the excised peptide.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM026666-12
Application #
3274062
Study Section
Special Emphasis Panel (SSS (B))
Project Start
1979-07-01
Project End
1994-08-31
Budget Start
1990-09-01
Budget End
1991-08-31
Support Year
12
Fiscal Year
1990
Total Cost
Indirect Cost
Name
University of Tennessee Health Science Center
Department
Type
Schools of Medicine
DUNS #
941884009
City
Memphis
State
TN
Country
United States
Zip Code
38163
Desiderio, D M; Zhu, X (1998) Quantitative analysis of methionine enkephalin and beta-endorphin in the pituitary by liquid secondary ion mass spectrometry and tandem mass spectrometry. J Chromatogr A 794:85-96
Yan, L; Zhu, X; Tseng, J L et al. (1997) Beta-endorphin-containing proteins in the human pituitary. Peptides 18:1399-409
Beranova-Giorgianni, S; Desiderio, D M (1997) Fast atom bombardment mass spectrometry of synthetic peptides. Methods Enzymol 289:478-99
Lee, H G; Desiderio, D M (1997) Optimization of the capillary zone electrophoresis loading limit and resolution of proteins, using triethylamine, ammonium formate and acidic pH. J Chromatogr B Biomed Sci Appl 691:67-75
Desiderio, D M (1996) Mass spectrometric quantification of neuropeptides. Methods Mol Biol 61:57-65
Yavin, E J; Yan, L; Desiderio, D M et al. (1996) Synthetic peptides derived from the sequence of human C-reactive protein inhibit the enzymatic activities of human leukocyte elastase and human leukocyte cathepsin G. Int J Pept Protein Res 48:465-76
Grigoriants, O O; Desiderio, D M (1996) beta-endorphin1-31 in the rat pituitary. Int J Pept Protein Res 47:123-30
Tseng, J L; Yan, L; Fridland, G H et al. (1995) Tandem mass spectrometry analysis of synthetic opioid peptide analogs. Rapid Commun Mass Spectrom 9:264-75
Zhu, X; Robertson, J T; Sacks, H S et al. (1995) Opioid and tachykinin neuropeptides in prolactin-secreting human pituitary adenomas. Peptides 16:1097-107
Grigoriants, O O; Pravdenkova, S V; Andersen, B J et al. (1995) Alteration of opioid peptide concentrations in the rat pituitary following survivable closed head injury. Neurochem Res 20:827-31

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