Histochemistry and Cell Biology

, Volume 146, Issue 4, pp 421–430

A simple solution for antibody signal enhancement in immunofluorescence and triple immunogold assays

  • Abraham Rosas-Arellano
  • Juan B. Villalobos-González
  • Lourdes Palma-Tirado
  • Felipe A. Beltrán
  • Alfonso Cárabez-Trejo
  • Fanis Missirlis
  • Maite A. Castro
Original Paper

DOI: 10.1007/s00418-016-1447-2

Cite this article as:
Rosas-Arellano, A., Villalobos-González, J.B., Palma-Tirado, L. et al. Histochem Cell Biol (2016) 146: 421. doi:10.1007/s00418-016-1447-2

Abstract

Immunolocalization techniques are standard in biomedical research. Tissue fixation with aldehydes and cell membrane permeabilization with detergents can distort the specific binding of antibodies to their high affinity epitopes. In immunofluorescence protocols, it is desirable to quench the sample’s autofluorescence without reduction of the antibody-dependent signal. Here we show that adding glycine to the blocking buffer and diluting the antibodies in a phosphate saline solution containing glycine, Triton X-100, Tween20 and hydrogen peroxide increase the specific antibody signal in tissue immunofluorescence and immunogold electron microscopy. This defined antibody signal enhancer (ASE) solution gives similar results to the commercially available Pierce Immunostain Enhancer (PIE). Furthermore, prolonged tissue incubation in resin and fixative and application of ASE or PIE are described in an improved protocol for triple immunogold electron microscopy that is used to show co-localization of GABA-A ρ2 and dopamine D2 receptors in GFAP-positive astrocytes in the mouse striatum. The addition of glycine, Triton X-100, Tween20 and hydrogen peroxide during antibody incubation steps is recommended in immunohistochemistry methods.

Keywords

Background staining Confocal Fluorescence Immunohistochemistry Signal-to-noise ratio Transmission electron microscopy 

Supplementary material

418_2016_1447_MOESM1_ESM.pptx (43.4 mb)
Supplementary material 1 (PPTX 44413 kb)
418_2016_1447_MOESM2_ESM.docx (11 kb)
Supplementary material 2 (DOCX 11 kb)

Funding information

Funder NameGrant NumberFunding Note
Fondo Nacional de Desarrollo Científico y Tecnológico
  • 1110571
  • 1151206
  • 3140218
Dirección de Investigación, Universidad Austral de Chile
  • S-2015-81
Consejo Nacional de Ciencia y Tecnología
  • 179835

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Instituto de Bioquímica y Microbiología, Facultad de CienciasUniversidad Austral de ChileValdiviaChile
  2. 2.Center for Interdisciplinary Studies on the Nervous System (CISNe)Universidad Austral de ChileValdiviaChile
  3. 3.Unidad de Microscopía, Instituto de NeurobiologíaUniversidad Nacional Autónoma de MéxicoQuerétaroMéxico
  4. 4.Departamento de Fisiología, Biofísica y NeurocienciasCinvestav del IPN, Unidad ZacatencoCiudad de MéxicoMéxico

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