Partitioning of cancer therapeutics in nuclear condensates

Science. 2020 Jun 19;368(6497):1386-1392. doi: 10.1126/science.aaz4427.

Abstract

The nucleus contains diverse phase-separated condensates that compartmentalize and concentrate biomolecules with distinct physicochemical properties. Here, we investigated whether condensates concentrate small-molecule cancer therapeutics such that their pharmacodynamic properties are altered. We found that antineoplastic drugs become concentrated in specific protein condensates in vitro and that this occurs through physicochemical properties independent of the drug target. This behavior was also observed in tumor cells, where drug partitioning influenced drug activity. Altering the properties of the condensate was found to affect the concentration and activity of drugs. These results suggest that selective partitioning and concentration of small molecules within condensates contributes to drug pharmacodynamics and that further understanding of this phenomenon may facilitate advances in disease therapy.

Publication types

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

MeSH terms

  • Antineoplastic Agents / pharmacology*
  • Antineoplastic Agents / therapeutic use
  • Cell Cycle Proteins / genetics
  • Cell Cycle Proteins / metabolism
  • Cell Nucleus / metabolism*
  • Chromobox Protein Homolog 5
  • Chromosomal Proteins, Non-Histone / genetics
  • Chromosomal Proteins, Non-Histone / metabolism
  • Drug Resistance, Neoplasm*
  • Green Fluorescent Proteins / genetics
  • Green Fluorescent Proteins / metabolism
  • Humans
  • Mediator Complex Subunit 1 / genetics
  • Mediator Complex Subunit 1 / metabolism
  • Neoplasms / drug therapy*
  • Neoplasms / metabolism*
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism
  • Nucleophosmin
  • Recombinant Proteins / genetics
  • Recombinant Proteins / metabolism
  • Serine-Arginine Splicing Factors / genetics
  • Serine-Arginine Splicing Factors / metabolism
  • Transcription Factors / genetics
  • Transcription Factors / metabolism

Substances

  • Antineoplastic Agents
  • BRD4 protein, human
  • Cell Cycle Proteins
  • Chromosomal Proteins, Non-Histone
  • MED1 protein, human
  • Mediator Complex Subunit 1
  • Nuclear Proteins
  • Recombinant Proteins
  • Transcription Factors
  • Chromobox Protein Homolog 5
  • Nucleophosmin
  • SRSF2 protein, human
  • Green Fluorescent Proteins
  • Serine-Arginine Splicing Factors