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Phorbol esters: structure, biological activity, and toxicity in animals.

Gunjan Goel1, Harinder P S Makkar, George Francis

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|July 31, 2007
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Phorbol esters, natural plant compounds, mimic diacylglycerol (DAG) and activate protein kinase C. Their toxicity hinders use in animal feed, despite potential antimicrobial and antitumor applications.

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Area of Science:

  • Natural Products Chemistry
  • Toxicology
  • Biochemistry

Background:

  • Phorbol esters are tetracyclic diterpenoids found in Euphorbiacaeae and Thymelaeaceae plants.
  • They mimic diacylglycerol (DAG), activating protein kinase C and influencing cellular signaling.
  • Biological activities are highly structure-specific.

Purpose of the Study:

  • To address the limitations posed by phorbol ester toxicity in utilizing protein-rich plant meals for animal feed.
  • To explore methods for extracting or inactivating phorbol esters in agricultural by-products.
  • To investigate the dual nature of phorbol esters, including their toxic and beneficial properties.

Main Methods:

  • Review of existing literature on phorbol ester properties and detoxification methods.
  • Analysis of chemical and physical treatments for phorbol ester inactivation.
  • Examination of reported detoxifying abilities in biological systems (molluscs, mouse liver).

Main Results:

  • Phorbol ester toxicity significantly restricts the use of certain plant materials in animal feed.
  • Limited success has been reported for chemical and physical detoxification methods.
  • Some phorbol ester derivatives exhibit antimicrobial and antitumor activities.
  • Molluscicidal and insecticidal properties suggest potential as biopesticides.

Conclusions:

  • Phorbol ester toxicity is a major challenge for agricultural applications, particularly in animal feed.
  • Further research is needed to develop effective detoxification strategies.
  • Phorbol esters possess a range of biological activities, including toxic, antinutritional, antimicrobial, antitumor, molluscicidal, and insecticidal properties, highlighting their complex nature and potential for diverse applications.