title: Hydrophobic allergens from the bottom fraction membrane of Hevea brasiliensis.
abstract: Several proteins of rubber latex have been recognized as allergens causing immediate hypersensitivity in humans. In this study, a bottom fraction membrane (BFM) protein preparation from Hevea brasiliensis trees grown in southern Thailand was used to detect specific IgE in four groups of serum samples. The first group included 170 samples of latex glove factory workers (LGWs); group 2 consisted of the sera of 35 health care workers (HCWs) who were repeatedly exposed to powdered latex gloves; groups 3 and 4 were 31 positive and 22 negative sera, respectively, obtained from Johns Hopkins University School of Medicine, Baltimore, USA, tested for IgE to latex allergen. It was found that 56/170 (33%), 5/35 (14%), 11/31 (35.5%) and 1/22 (4.5%) samples of the LGWs, HCWs, CAP+ and CAP- groups had significant IgE to the BFM proteins, respectively. However, of all subjects only one subject of group 1 had experienced allergic morbidity consisting of eczema, conjunctivitis and asthma. The IgE of this subject bound to a 55 kDa component in the rubber latex BFM preparation. Thus, this protein may be regarded as a novel, although minor, latex allergen. Further investigation is needed to characterize the component and to pinpoint its allergenic role.
authors.affiliation: Department of Biochemistry, Faculty of Science, Prince of Songkhla University, Songkhla 90112, Thailand.
authors.forename: Kesajee
authors.initials: K
authors.lastname: Mengumpun
authors.forename: Chatchai
authors.initials: C
authors.lastname: Tayapiwatana
authors.forename: Robert G
authors.initials: RG
authors.lastname: Hamilton
authors.forename: Pasuree
authors.initials: P
authors.lastname: Sangsupawanich
authors.forename: Rapepun
authors.initials: R
authors.lastname: Wititsuwannakul
mesh_terms: D000485:Allergens / Q000276:immunology* / Q000302:isolation & purification; D002458:Cell Fractionation; D017575:Gloves, Protective / Q000009:adverse effects; D019981:Health Care Sector; D006282:Health Personnel; D028482:Hevea; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D007073:Immunoglobulin E / Q000097:blood; D020315:Latex Hypersensitivity / Q000097:blood / Q000276:immunology*; D008566:Membranes; D016273:Occupational Exposure; D010940:Plant Proteins / Q000276:immunology* / Q000302:isolation & purification; D012408:Rubber / Q000009:adverse effects
chemical_list: D000485:Allergens; D010940:Plant Proteins; D007073:Immunoglobulin E; D012408:Rubber