Methods of enhancing or antigen presentation to T cells inhibiti

Chemistry: molecular biology and microbiology – Spore forming or isolating process

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435724, 4241851, 4241931, 530300, 530326, 530868, 514 2, 514 13, C12N 506, C07K 700, A61K 3810

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active

055590284

ABSTRACT:
The subject disclosure relates to the identification of mutations in the I.sub.i protein which result in an alteration of the endoprotease cleavage pattern of the mutant I.sub.i as compared with the endoprotease cleavage pattern of the wild type product. Methods for the identification of such mutants, and the mutants themselves are useful for the identification of classes of compounds to be further tested for immunomodulatory activity. A specific example of such a use is the screening of small organic compounds for the ability to bind to an intermediate in the I.sub.i endoprotease processing pathway. An small organic molecule having the ability to bind to such an intermediate can be further screened for the ability to modulate antigen presentation. The present invention also relates to the identification of immunomodulatory peptides. Peptides which either enchance or inhibit MHC Class II-restricted presentation of antigenic peptides are identified.

REFERENCES:
Reyes, et al., "Cathepsin B Cleavage of I.sub.i From Class II MHC .alpha.-and .beta.-Chains.sup.1," Journal of Immunology 146: 3877-3880, (1991).
Elliott et al., "An Hypothesis on the Binding of an Amphipathic, .alpha. Helical Sequence in I.sup.i to the Desetope of Class II Antigens," Journal of Immunology 138: 2949-2952, (1987).
Thomas et al., "Proteolytic Cleavage of I.sub.i to p25," Journal of Immunology 140: 2670-2674, (1988).
Stille et al., "Hydrophobic Strip-of-Helix Algorithm for Selection of T Cell-Presented Peptides," Molecular Immunology 24: 1021-1027, (1987).
Reyes et al., "Selection of Class I MHC-Restricted Peptides with the Strip-of-Helix Hydrophobicity Algorithm," Molecular Immunology 25: 867-871, (1988).
Nguyen et al., "Inhibition by Leupeptin and Antipain of the Intracellular Proteolysis of I.sub.i," Human Immunology 24: 153-163, (1989).
Quoc V. Nguyen and Robert E. Humphreys, "Time Course of Intracellular Associations, Processing, and Cleavages of I.sub.i Forms and Class II Major Histocompatibility Complex Molecules," Journal of Biological Chemistry 264: 1631-1637, (1989).
Reyes et al., "Prediction of Protein Helices with a Derivative of the Strip-of-Helix Hydrophobicity Algorithm," Journal of Biological Chemistry 264: 12854-12858, (1989).
Thomas et al., "Time-Dependent Cleavage of a High-Mannose Form of I.sup.i to p25 in an Intracellular Compartment," American Journal of Hematology 32: 167-177, (1989).
Goldschmidt et al., "Toward Engineering of T-Cell-Presented Epitopes," Vaccines 91: 339-343, (1991).
Lu et al., "Common Principles in Protein Folding and Antigen Presentation," Tibtech 9: 238-241, (1991).
Torgerson et al., "Highly Restricted Distributions of Hydrophobic and Charged Amino Acids in Longitudinal Quadrants of .alpha.-Helices," Journal of Biological Chemistry 266: 5521-5524, (1991).
Lam et al., "Highly Conserved, Potential Cleavage Sites about the Desetopes of MHC Class I and Class II Molecules," Tissue Antigens 39: 26-31, (1992).
Lu et al., "Number and Placement of Hydrophobic Residues in a Longitudinal Strip Governs Helix Formation of Peptides in the Presence of Lipid Vesicles," Journal of Biological Chemistry 266: 10054-10057, (1991).
Vazques et al., "Residues in the Longitudinal, Hydrophobic Strip-of-Helix Relate to Terminations and Crossings of .alpha.-Helices," Journal of Biological Chemistry 267: 7406-7410, (1992).
Rennell et al., "Critical Functional Role of the COOH-Terminal Ends of Longitudinal Hydrophobic Strips in .alpha.-Helices of T4 Lysozyme," Journal of Biological Chemistry 267: 17748-17752, (1992).
Goldschmidt et al., "Adsorption and Helical Coiling of Amphipathic Peptides on Lipid Vesicles Leads to Negligible Protection from Cathepsin B or Cathepsin D," Immunological Investigations 22: 25-40, (1993).
Nguyen et al., "Effects of Brefeldin A on Cleavage of Invariant Chain to p21 and p10 and the Appearance of I.sub.i -Freed Class II MHC Dimers," Molecular Immunology 30: 137-144, (1993).
Editorial, "Hypothesis for the Control of Clotting Factor VIII Inhibitory Antibodies by Decreasing Potency of Helper T-Cell-Recognized Epitopes in Factor VIII," Scand. J. Immunology 36: 653-660, (1992).
Reyes et al., "Binding of Radioiodinated Influenza Virus Peptides to Class I MHC Molecules and to Other Cellular Proteins as Analyzed by Gel Filtration and Photoaffinity Labeling," Molecular Immunology 28: 341-348, (1991).
Lu et al., "Role of Recurrent Hydrophobic Residues in Catalysis of Helix Formation by T Cell-Presented Peptides in the Presence of Lipid Vesicles," Journal of Immunology 145: 899-904, (1990).
Alitalo et al., editors, "Synthetic Peptides in Biology and Medicine," published 1985 by Elsevier Science Publishers B. V. (Biomedical Division) (The Netherlands), pp. 191-197.
Adams, S. et al., Eur. J. Immunology 25:1693-1702 (1995), "Invariant chain peptides enhancing or inhibiting the presentation of antigenic peptides by major histocompatibility complex class II molecules".

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