1. Academic Validation
  2. A Novel Peptidylarginine Deiminase 4 (PAD4) Inhibitor BMS-P5 Blocks Formation of Neutrophil Extracellular Traps and Delays Progression of Multiple Myeloma

A Novel Peptidylarginine Deiminase 4 (PAD4) Inhibitor BMS-P5 Blocks Formation of Neutrophil Extracellular Traps and Delays Progression of Multiple Myeloma

  • Mol Cancer Ther. 2020 Jul;19(7):1530-1538. doi: 10.1158/1535-7163.MCT-19-1020.
Marina Li 1 Cindy Lin 1 Hui Deng 1 Joann Strnad 2 Luca Bernabei 3 Dan T Vogl 3 James J Burke 2 Yulia Nefedova 4
Affiliations

Affiliations

  • 1 Immunology, Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, Pennsylvania.
  • 2 Bristol-Myers Squibb, Lawrenceville, New Jersey.
  • 3 Division of Hematology/Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, Pennsylvania.
  • 4 Immunology, Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, Pennsylvania. ynefedova@wistar.org.
Abstract

Multiple myeloma is a plasma cell malignancy, which grows in the bone marrow (BM). The major population of cells in the BM is represented by neutrophils and they can form neutrophil extracellular traps (NET). Here, we investigated whether multiple myeloma cells induce NET formation and whether targeting this process would delay multiple myeloma progression. We demonstrated that murine and human multiple myeloma cells stimulate citrullination of histone H3 and NET formation by neutrophils and that this process is abrogated by pharmacological targeting of peptidylarginine deiminase 4 (PAD4) with a novel-specific small molecule inhibitor BMS-P5. Administration of BMS-P5 to multiple myeloma-bearing mice delays appearance of symptoms and disease progression. Taken together, our data demonstrate that targeting PAD4 may be beneficial for treatment of multiple myeloma.

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