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Sensitivity of Daudi cells to tumor necrosis factor alpha: early changes in polyphosphoinositide metabolism

E Santavenere1, R Di Pietro, L Di Domenicantonio

  • 1Istituto di Morfologia Umana Normale, Chieti, Italy.

Cell Biology International
|September 1, 1996
PubMed

Insights

Recombinant Tumor Necrosis Factor alpha (r-TNF alpha) alters polyphosphoinositide metabolism in Daudi cells, reducing key lipid incorporation. This study reveals early metabolic changes during the cytokine

Area of Science:

  • Cellular Biology
  • Biochemistry
  • Immunology

Background:

  • Tumor Necrosis Factor alpha (TNF alpha) is a key cytokine involved in inflammation and immune responses.
  • Polyphosphoinositides are crucial signaling lipids involved in various cellular processes.
  • Previous studies indicated TNF alpha can induce polyphosphoinositide breakdown in certain cell types.

Purpose of the Study:

  • To investigate the effects of recombinant TNF alpha (r-TNF alpha) on polyphosphoinositide metabolism in Daudi cells.
  • To identify early changes in lipid metabolism associated with the antiproliferative response to r-TNF alpha.

Main Methods:

  • Daudi cells were treated in vitro with r-TNF alpha.
  • The incorporation of 32Pi into phosphatidylinositol (PtdIns), phosphatidylinositol 4-phosphate (PtdInsP), and phosphatidylinositol 4,5-phosphate (PtdInsP2) was measured.

Main Results:

  • r-TNF alpha treatment led to a significant reduction in the incorporation of 32Pi into PtdIns, PtdInsP, and PtdInsP2.
  • These changes were observed after 1 hour of in vitro treatment.
  • The findings confirm previous observations of PtdIns breakdown induced by r-TNF alpha.

Conclusions:

  • This study demonstrates early alterations in polyphosphoinositide metabolism in Daudi cells following r-TNF alpha treatment.
  • These metabolic changes are linked to the antiproliferative effects of TNF alpha in Burkitt Lymphoma cells.

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