PMID- 9120011 OWN - NLM STAT- MEDLINE DCOM- 19970424 LR - 20181113 IS - 0021-9738 (Print) IS - 0021-9738 (Linking) VI - 99 IP - 7 DP - 1997 Apr 1 TI - Conversion of the major birch pollen allergen, Bet v 1, into two nonanaphylactic T cell epitope-containing fragments: candidates for a novel form of specific immunotherapy. PG - 1673-81 AB - A novel approach to reduce the anaphylactic activity of allergens is suggested. The strategy makes use of the presence of conformational immunoglobulin E (IgE) epitopes on one of the most common allergens. The three dimensional structure of the major birch pollen allergen, Bet v 1, was disrupted by expressing two parts of the Bet v 1 cDNA representing amino acids 1-74 and 75-160 in Escherichia coli. In contrast to the complete recombinant Bet v 1, the fragments showed almost no allergenicity and exhibited random coil conformation as analyzed by circular dichroism. Both nonanaphylactic fragments induced proliferation of human Bet v 1-specific T cell clones, indicating that they harbored all dominant T cell epitopes and therefore may be considered as a basis for the development of a safe and specific T cell immunotherapy. FAU - Vrtala, S AU - Vrtala S AD - Department of Immunopathology, Institute of General and Experimental Pathology, AKH, University of Vienna, Austria. FAU - Hirtenlehner, K AU - Hirtenlehner K FAU - Vangelista, L AU - Vangelista L FAU - Pastore, A AU - Pastore A FAU - Eichler, H G AU - Eichler HG FAU - Sperr, W R AU - Sperr WR FAU - Valent, P AU - Valent P FAU - Ebner, C AU - Ebner C FAU - Kraft, D AU - Kraft D FAU - Valenta, R AU - Valenta R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Clin Invest JT - The Journal of clinical investigation JID - 7802877 RN - 0 (Allergens) RN - 0 (Antigens, Plant) RN - 0 (Epitopes) RN - 0 (Peptide Fragments) RN - 0 (Plant Proteins) RN - 0 (Recombinant Proteins) RN - 126161-14-6 (Bet v 1 allergen, Betula) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - *Allergens MH - Anaphylaxis/prevention & control MH - Animals MH - Antigens, Plant MH - Circular Dichroism MH - *Epitopes MH - Histamine Release MH - Humans MH - Hypersensitivity/*therapy MH - Immunoglobulin E/metabolism MH - Immunotherapy MH - Mice MH - Peptide Fragments/*immunology MH - Plant Proteins/*chemistry/immunology/isolation & purification MH - Protein Conformation MH - Recombinant Proteins/isolation & purification MH - T-Lymphocytes/*immunology PMC - PMC507987 EDAT- 1997/04/01 00:00 MHDA- 1997/04/01 00:01 PMCR- 1997/04/01 CRDT- 1997/04/01 00:00 PHST- 1997/04/01 00:00 [pubmed] PHST- 1997/04/01 00:01 [medline] PHST- 1997/04/01 00:00 [entrez] PHST- 1997/04/01 00:00 [pmc-release] AID - 10.1172/JCI119330 [doi] PST - ppublish SO - J Clin Invest. 1997 Apr 1;99(7):1673-81. doi: 10.1172/JCI119330.