Volume 52 (6): 789-795, 2004 Copyright ©The Histochemical Society, Inc. Presence of Collagen IV in the Ciliary Zonules of the Human Eye : An Immunohistochemical Study by LM and TEM
University Hospital/University of Groningen, Department of Ophthalmology (LIL,RJvdW,JMMH), and University of Groningen, Department of Pathology and Laboratory Medicine, Section of Medical Biology (RJvdW,MJAvL), Groningen, The Netherlands Correspondence to: Leonoor I. Los, University Hospital/University of Groningen, Dept.of Ophthalmology, PO Box 30,001, 9700 RB Groningen, The Netherlands. E-mail: l.i.los{at}ohk.azg.nl The ciliary zonules of the eye are composed of fibrillar and non-fibrillar components. Fibrils provide tensile strength and elasticity, whereas non-fibrillar components serve as a coating surrounding the fibrils. This coating behaves as a barrier to macromolecules. The present light and transmission electron microscopic (LM and TEM) study identified collagen IV as a novel component of this coating. Collagen IV was demonstrated by pre-embedding and postembedding immunohistochemical (IHC) techniques using monoclonal and polyclonal antibodies. The specificity of the polyclonal anticollagen IV antibody was verified by ELISA. (J Histochem Cytochem 52:789795, 2004)
Key Words: collagen IV ciliary zonules immunohistochemistry
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