Abstract

The immuno response of T cells requires an antigen to be recognized. We demonstrated with the model protein antigen Hen Egg Lysozyme (HEL) that this response to proteins involves unfolding and degradation to peptides that are recognized on the surface of antigen-presenting cells (APC) in association with the major histocompatibility complex (MHC) molecules. Previous results showed that T-cells, after activation by I-Ak type APC, respond to a synthetic 10-mer residue, HEL 51-62. Similarly, T cells after activation by I-Ek type APC, respond to a 13-mer, HEL 84-96. HPLC chromatography of the mixture extracted from MHC class II complexes of APC after treatment with HEL gave the immuno active fractions that were analyzed by MALDI-TOF and cf-FAB MS. The major components were HEL 48-63, 48-62, 48-61 for I-Ak type APC and HEL 84-97, 84-98, 84-102 for I-Ek type APC. To extend the understanding of the protein antigen processing mechanism producing the peptides that are presented to the T cells, we are working on characterizing peptides produced from a series of mutated HEL proteins. We are developing methods involving MALDI, flow FAB/tandem MS, and electrospray tandem MS to solve these important immunology problems.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR000954-20
Application #
5221765
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
20
Fiscal Year
1996
Total Cost
Indirect Cost

  Publications

Yue, Xuyi; Dhavale, Dhruva D; Li, Junfeng et al. (2018) Design, synthesis, and in vitro evaluation of quinolinyl analogues for ?-synuclein aggregation. Bioorg Med Chem Lett 28:1011-1019
Ohlemacher, Shannon I; Giblin, Daryl E; d'Avignon, D André et al. (2017) Enterobacteria secrete an inhibitor of Pseudomonas virulence during clinical bacteriuria. J Clin Invest 127:4018-4030
Lin, Xiaobo; Racette, Susan B; Ma, Lina et al. (2017) Endogenous Cholesterol Excretion Is Negatively Associated With Carotid Intima-Media Thickness in Humans. Arterioscler Thromb Vasc Biol 37:2364-2369
Ovod, Vitaliy; Ramsey, Kara N; Mawuenyega, Kwasi G et al. (2017) Amyloid ? concentrations and stable isotope labeling kinetics of human plasma specific to central nervous system amyloidosis. Alzheimers Dement 13:841-849
Cade, W Todd; Levy, Philip T; Tinius, Rachel A et al. (2017) Markers of maternal and infant metabolism are associated with ventricular dysfunction in infants of obese women with type 2 diabetes. Pediatr Res 82:768-775
Lucey, Brendan P; Mawuenyega, Kwasi G; Patterson, Bruce W et al. (2017) Associations Between ?-Amyloid Kinetics and the ?-Amyloid Diurnal Pattern in the Central Nervous System. JAMA Neurol 74:207-215
Alvarez, Jessica A; Ziegler, Thomas R; Millson, Erin C et al. (2016) Body composition and lung function in cystic fibrosis and their association with adiposity and normal-weight obesity. Nutrition 32:447-52
Sterl, Karin; Wang, Songyan; Oestricker, Lauren et al. (2016) Metabolic responses to xenin-25 are altered in humans with Roux-en-Y gastric bypass surgery. Peptides 82:76-84
Wei, Xiaochao; Song, Haowei; Yin, Li et al. (2016) Fatty acid synthesis configures the plasma membrane for inflammation in diabetes. Nature 539:294-298
Shields-Cutler, Robin R; Crowley, Jan R; Miller, Connelly D et al. (2016) Human Metabolome-derived Cofactors Are Required for the Antibacterial Activity of Siderocalin in Urine. J Biol Chem 291:25901-25910

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