Advertisement

Histochemistry and Cell Biology

, Volume 107, Issue 5, pp 411–416 | Cite as

In situ assessment of mRNA accessibility in heterogeneous tissue samples using elongation factor-1α (EF-1α)

  • A. D. Gruber
  • Roy Alan Levine
ORIGINAL PAPER

Abstract

 Elongation factor-1α (EF-1α) is an evolutionarily highly conserved universal cofactor of protein synthesis in all living cells. In this study, its use as a positive control in situ hybridization assays for specific detection of mRNA sequences was evaluated. Northern blot analysis of various non-neoplastic and neoplastic cultured cells of different stages of confluence, cell shape, and cell cycle status revealed that EF-1α had a lower and more homogeneous expression than did β-actin. In situ hybridization assays using digoxigenin-labeled riboprobes for the detection of EF-1α mRNA in routinely formalin-fixed, paraffin-embedded tissue sections showed that EF-1α is a suitable positive control in all types of cells. However, variation of protease pretreatments demonstrated distinct and sometimes mutually exclusive digestion conditions for different cell types within the same tissue sample. Our results indicate that detection of EF-1α mRNA is an appropriate internal standard for in situ hybridization assays and that it is useful to control artifacts such as false negatives caused by inappropriate protease pretreatments. The observed variability of optimal protease pretreatments for different cell types within the same tissue section strengthens the importance of a positive control in in situ hybridization assays.

Keywords

Tissue Section Northern Blot Northern Blot Analysis mRNA Sequence Specific Detection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • A. D. Gruber
    • 1
  • Roy Alan Levine
    • 1
  1. 1.Cancer Biology Laboratories, Department of Pathology, New York State College of Veterinary Medicine, Cornell University, Ithaca, NY 14853-6401, USA Tel. +1 607 253 3324; Fax +1 607 253 3708US

Personalised recommendations