The involvement of sphingosine kinase 1 in LPS‐induced Toll‐like receptor 4‐mediated accumulation of HIF‐1α protein, activation of ASK1 and production of the pro‐inflammatory cytokine IL‐6Dmitri Pchejetski, Vadim V. Sumbayev, Karen Coughlan et al.|Immunology and Cell Biology|2010Cited by 57