The major allergen of sesame seeds (Sesamum indicum) is a 2S albumin

被引:92
作者
Pastorello, EA
Varin, E
Farioli, L
Pravettoni, V
Ortolani, C
Trambaioli, C
Fortunato, D
Giuffrida, MG
Rivolta, F
Robino, A
Calamari, AM
Lacava, L
Conti, A
机构
[1] Osped Maggiore IRCCS, Div Gen Med 3, Allergy Ctr, I-20122 Milan, Italy
[2] ICP, Pediat Clin De Marchi, Milan, Italy
[3] ICP, Unita Operat Osped Med Lavoro, UOOLM, CEMOC, Milan, Italy
[4] Niguarda Ca Granda Hosp, Bizzozzero Div, Milan, Italy
[5] Natl Res Council, Turin, Italy
来源
JOURNAL OF CHROMATOGRAPHY B | 2001年 / 756卷 / 1-2期
关键词
food allergens; sesame seeds; albumin;
D O I
10.1016/S0378-4347(01)00073-1
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Background: Allergic reactions induced by ingestion of foods containing sesame seeds are a well recognized cause of severe food-induced anaphylaxis. Objective: This study aimed to identify and characterize the clinically most important major allergen of sesame seeds. Methods: Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and IgE immunoblotting were performed on sera of 10 patients selected for severe and documented allergic reaction after eating food containing sesame. The major allergen was purified by gel filtration and characterized by isoelectric point (pI), glycosylation and amino acid sequencing. Results: All the patients had positive IgE antibodies and skin prick tests (SPTs) to sesame. The major, clinically most important allergen was a protein with molecular mass of about 9000. It was not glycosylated, the amino acid sequence showed it was a 25 albumin with a pI of 7.3: the small and the large subunits, forming the whole protein, showed pI values of 6.5 and 6.0. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:85 / 93
页数:9
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