Pin1 and Par14 peptidyl prolyl isomerase inhibitors block cell proliferation

Chem Biol. 2003 Jan;10(1):15-24. doi: 10.1016/s1074-5521(02)00310-1.


Disruption of the parvulin family peptidyl prolyl isomerase (PPIase) Pin1 gene delays reentry into the cell cycle when quiescent primary mouse embryo fibroblasts are stimulated with serum. Since Pin1 regulates cell cycle progression, a Pin1 inhibitor would be expected to block cell proliferation. To identify such inhibitors, we screened a chemical compound library for molecules that inhibited human Pin1 PPIase activity in vitro. We found a set of compounds that inhibited Pin1 PPIase activity in vitro with low microM IC50s and inhibited the growth of several cancer lines. Among the inhibitors, PiB, diethyl-1,3,6,8-tetrahydro-1,3,6,8-tetraoxobenzo[lmn] phenanthroline-2,7-diacetate ethyl 1,3,6,8-tetrahydro-1,3,6,8-tetraoxo-benzo[lmn] phenanthroline-(2H,7H)-diacetate, had the least nonspecific toxicity. These results suggest that Pin1 inhibitors could be used as a novel type of anticancer drug that acts by blocking cell cycle progression.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology*
  • Arabidopsis Proteins*
  • Cell Cycle Proteins / drug effects
  • Cell Division / drug effects
  • Cell Line, Tumor
  • Embryo, Mammalian
  • Enzyme Inhibitors / pharmacology
  • Fibroblasts / cytology
  • Gene Expression Profiling
  • Humans
  • Interphase / drug effects*
  • Kinetics
  • Membrane Proteins / antagonists & inhibitors*
  • Membrane Proteins / physiology
  • Membrane Transport Proteins*
  • Mice
  • Mice, Knockout
  • Models, Molecular
  • NIMA-Interacting Peptidylprolyl Isomerase
  • Peptidylprolyl Isomerase / antagonists & inhibitors*
  • Peptidylprolyl Isomerase / physiology
  • Phenanthrolines / chemistry
  • Phenanthrolines / pharmacology*
  • Structure-Activity Relationship


  • Antineoplastic Agents
  • Arabidopsis Proteins
  • Cell Cycle Proteins
  • Enzyme Inhibitors
  • Membrane Proteins
  • Membrane Transport Proteins
  • NIMA-Interacting Peptidylprolyl Isomerase
  • PIN1 protein, Arabidopsis
  • Phenanthrolines
  • diethyl-1,3,6,8-tetrahydro-1,3,6,8-tetraoxobenzo(lmn)(3,8)phenanthroline-2,7-diacetate
  • PIN1 protein, human
  • PIN4 protein, human
  • Peptidylprolyl Isomerase
  • Pin1 protein, mouse