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Title: Identification of alpha-fetoprotein as an autoantigen in juvenile Batten disease.

Authors: Castaneda, Julian A; Pearce, David A

Published In Neurobiol Dis, (2008 Jan)

Abstract: Humoral autoimmunity against glutamic acid decarboxylase has been described in juvenile Batten disease patients and in the Cln3(-/-) mouse model. To obtain a more comprehensive understanding of the repertoire of antigens targeted, we examined the reactivity of Cln3(-/-) mouse sera to brain proteins from fetal, postnatal and adult rats. Among the candidate antigens identified was alpha-fetoprotein (AFP), a protein that has altered expression in several nervous system disorders and hepatic malignancies. Moreover, AFP levels were upregulated in the brains and livers of postnatal day 14 Cln3(-/-) animals. Sera from 31 juvenile Batten disease patients revealed the presence of anti-AFP autoantibodies in juvenile Batten disease male patients (12/13) and female patients (8/18). While these findings provide more evidence that autoimmunity is an active component of juvenile Batten disease, the gender-apparent difference evidenced by patients with regard anti-AFP antibodies may underlie variation in progression and clinical manifestations in this disorder.

PubMed ID: 17931875 Exiting the NIEHS site

MeSH Terms: Adolescent; Adult; Animals; Animals, Newborn; Autoantibodies/metabolism; Autoantigens/metabolism*; Child; Disease Models, Animal; Electrophoresis, Gel, Two-Dimensional/methods; Embryo, Mammalian; Female; Gene Expression Regulation, Developmental/physiology; Humans; Liver Function Tests/methods; Liver/metabolism; Male; Membrane Glycoproteins/deficiency; Mice; Mice, Knockout; Molecular Chaperones; Neuronal Ceroid-Lipofuscinoses/immunology*; Neuronal Ceroid-Lipofuscinoses/metabolism*; Sequence Analysis, Protein; Tandem Mass Spectrometry/methods; alpha-Fetoproteins/analysis*; alpha-Fetoproteins/metabolism*

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