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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Induction of thromboxane A2 synthesizing enzymes in DMSO-induced granulocytic differentiation of HL-60 cells.

Human leukemia (HL)-60 cells were differentiated by several agents, and prostaglandins (PGs) and thromboxane (TX) synthesizing activity increased in response to the differentiation of the cells. We examined the expression of messenger RNA (mRNA) for TX-synthesizing enzymes, cyclooxygenase (COX)-1, COX-2 and TXA(2) synthase, in dimethyl sulfoxide (DMSO)-differentiated HL-60 cells by reverse transcriptase polymerase chain reaction (RT-PCR), and A23187-stimulated TXB(2) production, a stable metabolite of TXA(2), by radioimmunoassay (RIA). A23187-stimulated TXB(2) production, and mRNA abundance for COX-2, were not detected in non-treated HL-60 cells. TXA(2) synthase mRNA were barely detected in non-treated HL-60 cells. DMSO-induced HL-60 cells gained induction of TXB(2) synthesis and mRNA for COX-2 and TXA(2) synthase during granulocytic differentiation. COX-1 mRNA was constitutively expressed. A23187-stimulated TXB(2) production in DMSO-treated cells was inhibited by NS-398, a specific COX-2 inhibitor. These results demonstrated that TXB(2) production in granulocytic HL-60 cells was regulated at both the enzyme level of COX-2 and TXA(2) synthase.[1]

References

  1. Induction of thromboxane A2 synthesizing enzymes in DMSO-induced granulocytic differentiation of HL-60 cells. Zaitsu, M., Ishii, E., Hamasaki, Y. Prostaglandins Leukot. Essent. Fatty Acids (2002) [Pubmed]
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