Effects of acute administration of O,O,S-trimethyl phosphorothioate on the respiratory burst and phagocytic activity of splenic and peritoneal leukocytes

K. E. Rodgers, D. D. Ellefson

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

An impurity in malathion, O,O,S-trimethyl phosphorothioate (OOS-TMP), was previously shown to be immunosuppressive. The immune cell type which induced immune suppression caused by OOS-TMP at 24 hrs after administration was found to be splenic macrophages. Further characterization of macrophages from OOS-TMP treated mice indicated that OOS-TMP led to macrophage differentiation. In this study, these initial studies were continued and extended to examine the effects of OOS-TMP on splenic and peritoneal macrophages at various times following exposure. Administration of OOS-TMP increased the size heterogeneity of cell volume, phagocytic capability and respiratory burst activity of splenic and peritoneal macrophages. However, by day 7 splenic and peritoneal macrophages from similar to control. These data would suggest that macrophages not previously exposed to OOS-TMP migrated to the spleen and peritoneum of treated animals. This migration may allow the restoration of the ability of splenocytes from treated animals to generate an immune response. Alternatively, these data may indicate that 7 days following exposure to OOS-TMP, the differentiative state of the splenic and peritoneal macrophages of treated mice had decayed and hence these cells had regained resident characteristics.

Original languageEnglish (US)
Pages (from-to)152-160
Number of pages9
JournalAgents and Actions
Volume24
Issue number1-2
DOIs
StatePublished - Jun 1988
Externally publishedYes

ASJC Scopus subject areas

  • Toxicology
  • Pharmacology (medical)

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