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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Autoimmune reactivity against precursor form of desmoglein 1 in healthy Tunisians in the area of endemic pemphigus foliaceus
Journal of Dermatological Science, Volume 70, No. 1, Year 2013
Notification
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Description
Background: Desmoglein 1 (Dsg1), the pemphigus foliaceus (PF) antigen, is produced as a precursor (preDsg1) and is transported to the cell surface as the mature form (matDsg1). Recent studies show that B cells from North American individuals without pemphigus can potentially produce anti-preDsg1 IgG antibodies, but ELISA screening of large numbers of normal people in North America and Japan hardly ever shows circulating antibodies against preDsg1 or matDsg1. In contrast, in Tunisia, where PF is endemic, anti-Dsg1 IgGs are frequently detected in healthy individuals. Objective: To characterize these anti-Dsg1 antibodies from normal individuals in Tunisia. Methods: Sera from 16 healthy individuals and 9 PF patients in the endemic PF area in Tunisia, and sera from Japanese non-endemic PF patients were analyzed by immunoprecipitation-immunoblotting using recombinant proteins of preDsg1, matDsg1, and domain-swapped Dsg1/Dsg2 molecules. Results: Sera from normal Tunisian individuals reacted to preDsg1 alone (8/16) or more strongly to preDsg1 than to matDsg1 (7/16), while those from all Tunisian PF patients and Japanese non-endemic PF patients reacted similarly to preDsg1 and matDsg1, or preferentially to matDsg1. The epitopes recognized by anti-Dsg1 IgGs from normal Tunisian individuals were more frequently found in the C-terminal extracellular domains (EC3 to EC5), while those in Tunisian endemic PF patients were more widely distributed throughout the extracellular domains, suggesting IgGs against EC1 and EC2 developed during disease progression. Conclusions: These findings indicate that IgG autoantibodies against Dsg1 are mostly raised against preDsg1 and/or C-terminal domains of Dsg1 in healthy Tunisians in the endemic area of PF. © 2013 Japanese Society for Investigative Dermatology.
Authors & Co-Authors
Toumi, Amina
Unknown Affiliation
Saleh, Marwah Adly
Unknown Affiliation
Yamagami, Jun
Unknown Affiliation
Abida, Olfa
Unknown Affiliation
Kallel, Maryem
Unknown Affiliation
Masmoudi, Abderrahmane
Unknown Affiliation
Makni, Soundes
Unknown Affiliation
Turki, Hamaida
Unknown Affiliation
Hachiya, Takahisa
Unknown Affiliation
Kuroda, Keiko
Unknown Affiliation
Stanley, John R.
Unknown Affiliation
Masmoudi, Hatem
Unknown Affiliation
Amagai, Masayuki
Unknown Affiliation
Statistics
Citations: 13
Authors: 13
Affiliations: 8
Identifiers
Doi:
10.1016/j.jdermsci.2013.02.002
ISSN:
09231811
e-ISSN:
1873569X
Study Locations
Tunisia