Immunocytochemical Localization of Endothelin Peptides, Precursors, and Endothelin-Converting Enzymes

  • Rhoda E. Kuc
Part of the Methods in Molecular Biology™ book series (MIMB, volume 206)


This chapter will describe the protocol used for the immunocytochemical (ICC) visualization of endothelin (ET) peptides, precursors and endothelin converting enzymes (ECEs) in both frozen cryostat tissue sections and cultured cells using polyclonal primary antisera raised in rabbits. We have raised antisera against the ET-1 carboxy-terminal heptapeptide, ET-1(15–21), which is conserved in all three ET isoforms, (thus, the antibody does not distinguish between the three mature peptides); big ET-1(31–38), big ET-2(31–37) and big ET-3(31–42) (1), the ECE-1 isoforms (2,3) and ECE-2 (4) (see Fig. 1). The specificity of these antisera have been characterized using radioimmunoassays (RIA, [5], see  Chapter 2), enzyme-linked immunosorbant assays (ELISA, see  Chapter 2) and in a comprehensive range of human and animal tissues using ICC, including comparisons with commercially available antibodies, although in most cases the staining achieved with these was less intense (1,6).
Fig. 1.

Amino acid sequences used to generate site-directed antisera in endothelin peptides and endothelin-converting enzyme (ECE) proteins.


Mature Peptide Nonspecific Background Staining Brown Reaction Product Alcohol Bath Excess Buffer 
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Copyright information

© Humana Press Inc. 2002

Authors and Affiliations

  • Rhoda E. Kuc
    • 1
  1. 1.Clinical Pharmacology UnitUniversity of CambridgeCambridgeUK

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