Peptides as Targets and Carriers

  • P. S. Ringrose
  • M. J. Humphrey
Part of the NATO ASI Series book series (NSSA, volume 113)


The discovery of diverse neurohormonal and other biologically active peptides has increased interest in exploiting peptide mimetics as therapeutic drugs.1–4 The high potency, local synthesis/release and rapid in-activation of natural peptides can cause particular problems in designing synthetic drug molecules that are both selective and have reasonable duration of action. Selective drug targeting is usually achieved by specific agonist/antagonist activity for a particular cell surface receptor or by specific interaction with an enzyme active site on a peptidase, which in turn is involved in either activating or deactivating a biologically active peptide. Synthetic peptides also have utility in facilitating the selective uptake of other drug molecules into target tissues by exploiting permease specificities and in some cases the specific tissue localization of peptidases. These mechanisms will be discussed with examples of carrier peptides and peptides targeted on specific receptors. Particular comment will, however, also be made of the pharmacokinetic problems encountered with peptide drugs the route of drug administration, intestinal absorption, metabolic stability, target tissue distribution and renal vs. biliary excretion.


Thyrotropin Release Hormone Atrial Natriuretic Factor Luteinizing Hormone Release Hormone Enzyme Active Site Peptide Drug 
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.


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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • P. S. Ringrose
    • 1
  • M. J. Humphrey
    • 1
  1. 1.Pfizer Central ResearchSandwich, KentUK

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