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Cancer Immunology, Immunotherapy

, Volume 25, Issue 3, pp 185–192 | Cite as

Activation of macrophages by ether analogues of lysophospholipids

  • Nobuto Yamamoto
  • Benjamin Z. Ngwenya
  • Theodore W. Sery
  • Ronald A. Pieringer
Original Articles

Summary

Inflammation processes cause activation of phospholipase A in plasma membranes resulting in the production of various lysophospholipids. Treatment of mice with L-α-lysophosphatidyl-DL-glycerol (lyso-Pg) resulted in an enhanced ingestion activity of peritoneal macrophages as did other lysophospholipids. However, lyso-Pg is rather toxic as indicated by a rapid decrease in macrophage activity 3 days after treatment while macrophage activity of lysophosphatidylcholine-treated mice continued to increase at least up to the 6th day after treatment. Alkyl-lysophospholipid derivatives, racemic 1-0-octadecyl-2-methylglycero-3-phosphocholine and -phosphoethanolamine stimulated mouse macrophages for Fc-mediated ingestion. Decomposed products of alkyl-lysophospholipids, alkylglycerols, were also found to be excellent activators of macrophages not only for ingestion of IgG-coated target cells but also antibody-mediated tumoricidal activity. Macrophages from mice treated with alkylglycerols developed superoxide generating capacity. Furthermore, alkylglycerols were found to be tumoricidal by direct contact with retinoblastoma cells. Therefore, the advantage of the potential application of alkylglycerols as chemotherapeutic agents is that they have dual beneficial effects: potentiation of macrophage activity and cytotoxicity to malignant cells.

Keywords

Superoxide Chemotherapeutic Agent Rapid Decrease Peritoneal Macrophage Retinoblastoma 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Nobuto Yamamoto
    • 1
  • Benjamin Z. Ngwenya
    • 1
  • Theodore W. Sery
    • 2
  • Ronald A. Pieringer
    • 3
  1. 1.Department of Microbiology and ImmunologyHahnemann University School of MedicinePhiladelphiaUSA
  2. 2.Wills Eye Hospital Research DivisionPhiladelphia
  3. 3.Department of BiochemistryTemple University School of MedicinePhiladelphiaUSA

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