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DOI: 10.1369/jhc.3A6221.2004
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Journal of Histochemistry and Cytochemistry
Volume 52 (7): 915-922, 2004
Copyright ©The Histochemical Society, Inc.

Neurocan–GFP Fusion Protein : A New Approach to Detect Hyaluronan on Tissue Sections and Living Cells

Hui Zhang, Stephan L. Baader, Michael Sixt, Joachim Kappler and Uwe Rauch

Department of Experimental Pathology, Lund University, Lund, Sweden (HZ,MS,UR); Department of Pathology, AstraZeneca R&D Sodertalje, Sodertalje, Sweden (HZ); Institute of Anatomy and Cell Biology University of Bonn, Bonn, Germany (SLB); and Institute for Physiological Chemistry University of Bonn, Bonn, Germany (JK)

Correspondence to: Uwe Rauch, Dept. of Experimental Pathology, University Hospital, S221 85 Lund, Sweden. E-mail: uwe.rauch{at}pat.lu.se

Hyaluronan is an unsulfated glycosaminoglycan (GAG) that is ubiquitously expressed in the extracellular matrix (ECM) of all vertebrates, where hyaluronan rich matrices constitute a particular permissive environment for the development of complex biological structures and also for tumor progression. Because of its conserved structure and ubiquitous expression, antibodies for its histochemical detection cannot be produced. We have engineered a fusion protein, neurocan–GFP, and expressed it as a secreted molecule in mammalian cells. Neurocan–GFP fusion protein specifically binds to hyaluronan and directly visualizes hyaluronan on tissue sections, revealing a very detailed picture of hyaluronan distribution. The fluorescent fusion protein can be used in combination with antibodies and nuclear markers for double or triple staining. In addition, it is suitable to visualize hyaluronan on living cells by time-lapse video microscopy. The successful production and application of the neurocan–GFP fusion protein opens up new perspectives for using GFP fusion proteins as detection tools in histological and cytological studies complementing conventional antibody and biotin/avidin techniques. (J Histochem Cytochem 52:915–922, 2004)

Key Words: hyaluronan • affinity histochemistry • neurocan • GFP • fusion protein • time-lapse video microscopy


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