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Journal of Histochemistry and Cytochemistry, Vol. 51, 397-400, March 2003, Copyright © 2003, The Histochemical Society, Inc.

BRIEF REPORT

Unspecific Labeling of Pancreatic Islets by Antisera Against Fibroblast Growth Factors and Their Receptors

Darwin S. Dichmanna, Claude Rescana, Ulrik Frandsena, and Palle Serupa
a Department of Developmental Biology, Hagedorn Research Institute, Gentofte, Denmark

Correspondence to: Palle Serup, Hagedorn Research Institute, Niels Steensensvej 6, DK-2820 Gentofte, Denmark. E-mail: pas@novonordisk.com

Six distinct fibroblast growth factors (FGFs) have been detected in pancreatic islets by immunohistochemistry (IHC) using commercially available antisera. We show here that these antisera are useful for Western blotting but that only two are suited for IHC. By Western blotting, these antisera detect recombinant FGFs. Detection can be eliminated by preabsorption with immunizing peptide but not with irrelevant peptide. By IHC we find specific labeling of islets with anti-FGF1 and anti-FGF2 antisera. Labeling can be abolished by preabsorption with the immunizing peptides. In contrast, prominent staining of islets by anti-FGF4, -FGF5, -FGF7, and -FGF10 antisera is unspecific because the staining cannot be competed by preabsorption with the immunizing peptides.

(J Histochem Cytochem 51:397–400, 2003)

Key Words: FGF, FGFR, growth factor, islet, ß-cell, diabetes, autocrine, pancreas


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[Abstract] [Full Text] [PDF]



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