Volume 39, Issue 2 pp. 165-175
Technical Spotlight
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A protocol for concurrent high-quality immunohistochemical and biochemical analyses in adult mouse central nervous system

Tina Notter

Tina Notter

Institute of Pharmacology and Toxicology, University of Zurich, CH-8057 Zurich, Switzerland

Neuroscience Center Zurich, Federal Institute of Technology and University of Zurich, Zurich, Switzerland

T.N. and P.P. contributed equally to this study.Search for more papers by this author
Patrizia Panzanelli

Patrizia Panzanelli

Department of Neuroscience Rita Levi Montalcini, University of Turin, Turin, Italy

T.N. and P.P. contributed equally to this study.Search for more papers by this author
Sandra Pfister

Sandra Pfister

Institute of Pharmacology and Toxicology, University of Zurich, CH-8057 Zurich, Switzerland

Neuroscience Center Zurich, Federal Institute of Technology and University of Zurich, Zurich, Switzerland

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Dennis Mircsof

Dennis Mircsof

Institute of Pharmacology and Toxicology, University of Zurich, CH-8057 Zurich, Switzerland

Neuroscience Center Zurich, Federal Institute of Technology and University of Zurich, Zurich, Switzerland

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Jean-Marc Fritschy

Corresponding Author

Jean-Marc Fritschy

Institute of Pharmacology and Toxicology, University of Zurich, CH-8057 Zurich, Switzerland

Neuroscience Center Zurich, Federal Institute of Technology and University of Zurich, Zurich, Switzerland

Correspondence: Dr J.-M. Fritschy, 1Institute of Pharmacology and Toxicology, as above.

E-mail: [email protected]

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First published: 10 December 2013
Citations: 49

Abstract

Biochemical analysis of central nervous system proteins and nucleic acids requires fresh-tissue homogenates, whereas immunohistochemistry usually is performed in sections prepared from perfusion-fixed tissue. Post-mortem immersion-fixation is possible, but largely impairs morphological preservation and protein antigenicity. Here, we present a simple, fast and versatile protocol allowing concurrent biochemical and immunohistochemical analysis, including pre-embedding immunoelectron microscopy, using tissue from the same animal. The protocol includes a brief transcardiac perfusion with ice-cold, oxygenated and glucose-supplemented artificial cerebrospinal fluid to maintain brain tissue alive, prior to isolation of regions of interest, followed by homogenisation for biochemistry or immersion-fixation for immunohistochemistry. We provide several examples demonstrating that this protocol allows optimal biochemical and morphological analysis, characterised with optimal sensitivity and preservation of tissue structure, along with a reduction of artefacts typically seen in perfusion-fixed tissue. This protocol should find widespread applications for combining analytical methods in tissue from the same animal, thereby reducing the number of mice required for a given experiment.

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