Abcc1 and Ggt5 support lymphocyte guidance through export and catabolism of S-geranylgeranyl-l-glutathione

Sci Immunol. 2021 Jun 4;6(60):eabg1101. doi: 10.1126/sciimmunol.abg1101.

Abstract

P2RY8 promotes the confinement and growth regulation of germinal center (GC) B cells, and loss of human P2RY8 is associated with B cell lymphomagenesis. The metabolite S-geranylgeranyl-l-glutathione (GGG) is a P2RY8 ligand. The mechanisms controlling GGG distribution are poorly understood. Here, we show that gamma-glutamyltransferase-5 (Ggt5) expression in stromal cells was required for GGG catabolism and confinement of P2RY8-expressing cells to GCs. We identified the ATP-binding cassette subfamily C member 1 (Abcc1) as a GGG transporter and showed that Abcc1 expression by hematopoietic cells was necessary for P2RY8-mediated GC confinement. Furthermore, we discovered that P2RY8 and GGG negatively regulated trafficking of B and T cells to the bone marrow (BM). P2RY8 loss-of-function human T cells increased their BM homing. By defining how GGG distribution was determined and identifying sites of P2RY8 activity, this work helps establish how disruptions in P2RY8 function contribute to lymphomagenesis and other disease states.

Publication types

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

MeSH terms

  • Animals
  • Female
  • Gene Knockdown Techniques
  • Gene Knockout Techniques
  • Glutathione / metabolism*
  • HEK293 Cells
  • Humans
  • Lymphocyte Activation
  • Lymphocytes / immunology*
  • Lymphocytes / metabolism
  • Male
  • Mice
  • Mice, Knockout
  • Multidrug Resistance-Associated Proteins / genetics
  • Multidrug Resistance-Associated Proteins / metabolism*
  • Receptors, Purinergic P2Y / genetics
  • Receptors, Purinergic P2Y / metabolism*
  • gamma-Glutamyltransferase / genetics
  • gamma-Glutamyltransferase / metabolism*

Substances

  • Multidrug Resistance-Associated Proteins
  • P2RY8 protein, human
  • Receptors, Purinergic P2Y
  • S-geranylgeranyl-L-glutathione
  • gamma-Glutamyltransferase
  • Glutathione
  • multidrug resistance-associated protein 1