Activation of human T cells with the physiological regulator of protein kinase C Academic Article Article uri icon


MeSH Major

  • Antineoplastic Combined Chemotherapy Protocols
  • Breast Neoplasms
  • Hemangioblasts
  • Hematopoietic Stem Cells
  • Vascular Endothelial Growth Factor Receptor-1
  • Vascular Endothelial Growth Factor Receptor-2


  • We investigated whether sn-1,2-dioctanoylglycerol (diC8) activates highly purified human T cells. diC8's signaling activity was also compared with that of 12-O-tetradecanoylphorbol-13-acetate (TPA). diC8 and ionomycin were synergistic in promoting T-cell proliferation. The proliferative response was dependent upon an operational interleukin-2 (IL-2) system and exhibited a high degree of specificity; sn-1,2-diC8 was twice as active as racemic-1,2-diC8, and diC8 and TPA were not synergistic. diC8's signaling activity differed from that of TPA. diC8, unlike TPA, failed to elicit IL-2 receptors or proliferation, independently of ionomycin. diC8 also failed to promote the proliferation of T cells signaled with anti-CD3 or -CD2 monoclonal antibodies. Two different inhibitors of PKC, 1-(5-isoquinolinylsulfonyl)-2-methylpiperazine or staurosporine, inhibited T-cell proliferation induced with diC8 and ionomycin, but not with TPA and ionomycin. These observations, in addition to demonstrating the differential activity of diC8 and TPA, document a signaling role for diacylglycerol in the activation of normal T cells.

publication date

  • October 15, 1988



  • Academic Article


Digital Object Identifier (DOI)

  • 10.1016/0008-8749(88)90243-2

PubMed ID

  • 2902930

Additional Document Info

start page

  • 439

end page

  • 49


  • 116


  • 2