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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Immunohistochemical localization of epidermal growth factor and acidic and basic fibroblast growth factors in postnatal developing and adult rat lungs.

Histologic preparations of lungs form 1-, 5-, 10-, 18-, and 25-day-old rats and adult rats were probed immunohistochemically with specific antibodies for the distribution of epidermal growth factor ( EGF), acidic fibroblast growth factor ( aFGF), and basic fibroblast growth factor ( bFGF). Immunoperoxidase staining of sections of adult rat lungs with a rabbit polyclonal antibody to bovine EGF was strong in ciliated cells of airways and mast cells, nonciliated cells of bronchioles, smooth muscle, type II cells of alveoli, and interstitial and epithelial cells of alveolar septal regions. Developing postnatal lungs had moderate and somewhat diffuse immunoreactivity in all epithelial cells, and more intense staining in vascular smooth muscle. Immunoperoxidase staining of adult rat lungs with a rabbit polyclonal antibody against bovine aFGF was distributed in identical fashion to EGF, with the exception of mast cells which were not reactive. These same sights were localized using an immunoperoxidase sequence with a rabbit polyclonal antibody to the leu 60-leu 98 fragment of aFGF (aFGFfr) with less background. In postnatal developing lungs, immunoreactivity with aFGF and aFGFfr preparations was diffuse and moderately intense in epithelial cells and vascular smooth muscle. Immunoperoxidase staining of adult rat lung sections with a monoclonal antibody to bovine bFGF was strong in hyaluronidase-digested preparations. Reactivity was principally confined to alveolar and vascular basement membrane regions and external laminae of smooth muscle. In early postnatal development, immunoreactivity for bFGF was found in basement membranes beneath developing epithelium and the endothelium of vessel wall intima and in the adventitia, with reactivity increasing with advancing age.(ABSTRACT TRUNCATED AT 250 WORDS)[1]


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