Discoipyrroles A-D: isolation, structure determination, and synthesis of potent migration inhibitors from Bacillus hunanensis

J Am Chem Soc. 2013 Sep 11;135(36):13387-92. doi: 10.1021/ja403412y. Epub 2013 Aug 28.

Abstract

Discoidin domain receptor 2 (DDR2) is a receptor tyrosine kinase involved in a variety of cellular response pathways, including regulation of cell growth, proliferation, and motility. Using a newly developed platform to identify the signaling pathway/molecular target of natural products, we identified a family of alkaloid natural products, discoipyrroles A-D (1-4), from Bacillus hunanensis that inhibit the DDR2 signaling pathway. The structure of 1-4, determined by detailed two-dimensional (2D) NMR methods and confirmed by X-ray crystallographic analysis has an unusual 3H-benzo[d]pyrrolo][1,3]oxazine-3,5-dione core. Discoipyrroles A-D potently inhibit DDR2 dependent migration of BR5 fibroblasts and show selective cytotoxicity to DDR2 mutant lung cancer cell lines (IC50 120-400 nM). Examination of the biosynthesis has led to the conclusion that the discoipyrroles are formed through a nonenzymatic process, leading to a one-pot total synthesis of 1.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents, Phytogenic / chemistry
  • Antineoplastic Agents, Phytogenic / isolation & purification
  • Antineoplastic Agents, Phytogenic / pharmacology*
  • Bacillus / chemistry*
  • Biological Products / chemistry
  • Biological Products / isolation & purification
  • Biological Products / pharmacology*
  • Cell Line, Tumor
  • Cell Movement / drug effects
  • Cell Proliferation / drug effects
  • Cell Survival / drug effects
  • Discoidin Domain Receptors
  • Dose-Response Relationship, Drug
  • Drug Screening Assays, Antitumor
  • Fibroblasts / cytology
  • Fibroblasts / drug effects*
  • Heterocyclic Compounds, 3-Ring / chemistry
  • Heterocyclic Compounds, 3-Ring / isolation & purification
  • Heterocyclic Compounds, 3-Ring / pharmacology*
  • Humans
  • Models, Molecular
  • Molecular Structure
  • Pyrrolidinones / chemistry
  • Pyrrolidinones / isolation & purification
  • Pyrrolidinones / pharmacology*
  • Receptor Protein-Tyrosine Kinases / antagonists & inhibitors*
  • Receptor Protein-Tyrosine Kinases / genetics
  • Receptor Protein-Tyrosine Kinases / metabolism
  • Receptors, Mitogen / antagonists & inhibitors*
  • Receptors, Mitogen / genetics
  • Receptors, Mitogen / metabolism
  • Signal Transduction / drug effects
  • Stereoisomerism
  • Structure-Activity Relationship

Substances

  • Antineoplastic Agents, Phytogenic
  • Biological Products
  • Heterocyclic Compounds, 3-Ring
  • Pyrrolidinones
  • Receptors, Mitogen
  • discoipyrrole A
  • discoipyrrole B
  • discoipyrrole C
  • discoipyrrole D
  • Discoidin Domain Receptors
  • Receptor Protein-Tyrosine Kinases