Vitronectin shows complement-independent binding to isolated keratin filament aggregates.

The Journal of Investigative Dermatology
H HintnerS M Breathnach

Abstract

Keratinocyte cell death, whether produced by skin disease or by physiologic apoptosis in normal skin, may result in formation of dermal keratin bodies, consisting mainly of keratin intermediate filament aggregates. Vitronectin, a multifunctional plasma and tissue glycoprotein, which inhibits the complement membrane attack complex and promotes cell attachment and spreading, is, like amyloid P component, associated with keratin bodies in vivo. To investigate a potential role for vitronectin in the removal of keratin bodies, we studied the interaction of vitronectin with keratin intermediate filaments in normal human skin and in Hep-2 cells, as well as with isolated keratin intermediate filament aggregates in vitro. Following pre-incubation of skin sections and Hep-2 cells with normal human serum (as a source of vitronectin), cytoplasmic staining of keratinocytes and of cytoskeletal filaments in Hep-2 cells was observed by immuno-fluorescence staining with polyclonal and monoclonal anti-vitronectin antibodies. Vitronectin binding to keratin intermediate filament aggregates extracted from normal human epidermis was demonstrated by immunofluorescence and by immunoblotting, and was not dependent on complement activation, because it o...Continue Reading

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Citations

Jul 1, 1990·The British Journal of Dermatology·H HintnerS M Breathnach
Jun 5, 1998·The Australasian Journal of Dermatology·S C HuilgolM M Black
Nov 5, 1997·American Journal of Respiratory Cell and Molecular Biology·D G PerryW J Martin
May 17, 2011·PloS One·Ondrej StepanekVaclav Horejsi
May 1, 1991·The Journal of Investigative Dermatology·H HintnerS M Breathnach
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Apr 26, 1995·Journal of Immunological Methods·D G Perry, W J Martin
Sep 18, 1998·The Journal of Investigative Dermatology·H FurumotoK Nakamura
Feb 1, 1993·The Journal of Investigative Dermatology·K DahlbäckB Dahlbäck

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