PMID- 9497502 OWN - NLM STAT- MEDLINE DCOM- 19980317 LR - 20190512 IS - 0019-2805 (Print) IS - 1365-2567 (Electronic) IS - 0019-2805 (Linking) VI - 92 IP - 4 DP - 1997 Dec TI - The major dog allergens, Can f 1 and Can f 2, are salivary lipocalin proteins: cloning and immunological characterization of the recombinant forms. PG - 577-86 AB - Canis familiaris allergen 1 (Can f 1) and Canis familiaris allergen 2 (Can f 2) are the two major allergens present in dog dander extracts. We now report the isolation of cDNAs encoding both proteins and present their nucleotide and deduced amino acid sequences. Can f 1, produced by tongue epithelial tissue, has homology with the von Ebner's gland (VEG) protein, a salivary protein not previously thought to have allergenic properties. Can f 2, produced by tongue and parotid gland, has homology with mouse urinary protein (MUP), a known allergen. Both VEG protein and MUP are members of the lipocalin family of small ligand-binding proteins. Recombinant forms of Can f 1 and Can f 2 were produced and tested for immunoglobulin E (IgE) reactivity. Among dog-allergic subjects, 45% had IgE directed exclusively to rCan f 1, and 25% had IgE to both rCan f 1 and rCan f 2. In addition, both recombinant proteins were able to cross-link IgE and elicit histamine release from peripheral blood leucocytes in vitro. These findings confirm that Can f 1 and Can f 2 are major and minor dog allergens, respectively, and demonstrate that recombinant forms of dog allergens retain at least some IgE-binding epitopes. FAU - Konieczny, A AU - Konieczny A AD - ImmuLogic Pharmaceutical Corporation, Waltham MA 02154, USA. FAU - Morgenstern, J P AU - Morgenstern JP FAU - Bizinkauskas, C B AU - Bizinkauskas CB FAU - Lilley, C H AU - Lilley CH FAU - Brauer, A W AU - Brauer AW FAU - Bond, J F AU - Bond JF FAU - Aalberse, R C AU - Aalberse RC FAU - Wallner, B P AU - Wallner BP FAU - Kasaian, M T AU - Kasaian MT LA - eng SI - GENBANK/AF027177 SI - GENBANK/AF027178 PT - Journal Article PL - England TA - Immunology JT - Immunology JID - 0374672 RN - 0 (Allergens) RN - 0 (Antigens, Plant) RN - 0 (DNA, Complementary) RN - 0 (RNA, Messenger) RN - 0 (Recombinant Proteins) RN - 0 (allergen Can f 2) RN - 0 (allergen Can f I) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Allergens/*genetics/immunology MH - Amino Acid Sequence MH - Animals MH - Antigens, Plant MH - Base Sequence MH - Blotting, Northern MH - Blotting, Western MH - DNA, Complementary/genetics MH - Dogs/*immunology MH - Histamine Release MH - Hypersensitivity/immunology MH - Immunoglobulin E/metabolism MH - Molecular Sequence Data MH - RNA, Messenger/genetics MH - Recombinant Proteins/immunology MH - Saliva/*immunology PMC - PMC1364166 EDAT- 1998/03/14 00:00 MHDA- 1998/03/14 00:01 PMCR- 1998/12/01 CRDT- 1998/03/14 00:00 PHST- 1998/03/14 00:00 [pubmed] PHST- 1998/03/14 00:01 [medline] PHST- 1998/03/14 00:00 [entrez] PHST- 1998/12/01 00:00 [pmc-release] AID - 10.1046/j.1365-2567.1997.00386.x [doi] PST - ppublish SO - Immunology. 1997 Dec;92(4):577-86. doi: 10.1046/j.1365-2567.1997.00386.x.