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Structural requirements for the antiproliferative activity of pre-mRNA splicing inhibitor FR901464

Sami Osman1, Brian J Albert, Yanping Wang

  • 1Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 13, 2011
PubMed

Insights

Researchers explored structure-activity relationships of the natural product FR901464, identifying key functional groups for its antitumor activity. This led to a simplified, potent analogue, aiding drug development.

Area of Science:

  • Natural Product Chemistry
  • Medicinal Chemistry
  • Molecular Biology

Background:

  • FR901464 is a natural product with reporter gene activation, pre-mRNA splicing inhibition, and antitumor properties.
  • Meayamycin, a more potent analogue, was previously developed via total synthesis of FR901464.

Purpose of the Study:

  • To elucidate detailed structure-activity relationships (SAR) of FR901464.
  • To identify essential structural features for biological activity.
  • To design and synthesize novel, simplified analogues with enhanced metabolic stability and antiproliferative activity.

Main Methods:

  • Systematic modification of FR901464's structure to probe SAR.
  • Total synthesis of novel analogues.
  • Evaluation of antiproliferative activity in vitro and in vivo.

Main Results:

  • The epoxide, tetrahydropyran ring carbons, Z-geometry side chain, 1,3-diene, C4-hydroxy, and C2''-carbonyl groups are crucial for activity.
  • The methyl group of the acetyl substituent is non-essential, yielding a new potent analogue.
  • Metabolically stable analogues were synthesized and evaluated for antiproliferative effects.

Conclusions:

  • Detailed SAR of FR901464 provides insights for simplifying the natural product structure.
  • Identification of non-essential groups facilitates the development of more effective drug candidates.
  • Structural simplification holds promise for future drug development of FR901464 analogues.

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