ATP-degrading ENPP1 is required for survival (or persistence) of long-lived plasma cells

Sci Rep. 2017 Dec 19;7(1):17867. doi: 10.1038/s41598-017-18028-z.

Abstract

Survival of antibody-secreting plasma cells (PCs) is vital for sustained antibody production. However, it remains poorly understood how long-lived PCs (LLPCs) are generated and maintained. Here we report that ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) is preferentially upregulated in bone marrow LLPCs compared with their splenic short-lived counterparts (SLPCs). We studied ENPP1-deficient mice (Enpp1 -/- ) to determine how the enzyme affects PC biology. Although Enpp1 -/- mice generated normal levels of germinal center B cells and plasmablasts in periphery, they produced significantly reduced numbers of LLPCs following immunization with T-dependent antigens or infection with plasmodium C. chabaudi. Bone marrow chimeric mice showed B cell intrinsic effect of ENPP1 selectively on generation of bone marrow as well as splenic LLPCs. Moreover, Enpp1 -/- PCs took up less glucose and had lower levels of glycolysis than those of wild-type controls. Thus, ENPP1 deficiency confers an energetic disadvantage to PCs for long-term survival and antibody production.

Publication types

  • Research Support, N.I.H., Intramural

MeSH terms

  • Adenosine Triphosphate / metabolism*
  • Animals
  • Antibody Formation / immunology
  • B-Lymphocytes / metabolism
  • Bone Marrow / metabolism
  • Bone Marrow Cells / metabolism
  • Cell Survival / physiology
  • Cells, Cultured
  • Germinal Center / metabolism
  • Glucose / metabolism
  • Glycolysis / physiology
  • Humans
  • Mice
  • Mice, Inbred C57BL
  • Phosphoric Diester Hydrolases / metabolism*
  • Plasma Cells / metabolism*
  • Pyrophosphatases / metabolism*
  • Spleen / metabolism
  • Up-Regulation / physiology

Substances

  • Adenosine Triphosphate
  • Phosphoric Diester Hydrolases
  • ectonucleotide pyrophosphatase phosphodiesterase 1
  • Pyrophosphatases
  • Glucose