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Previously postulated “ligand-independent” signaling of GPR4 is mediated through proton-sensing mechanismsMasayuki Tobo, Fumikazu Okajima, Hideaki Tomura et al.|Cellular Signalling|2007Cited by 97
Role of p38 mitogen-activated kinase and c-Jun terminal kinase in migration response to lysophosphatidic acid and sphingosine-1-phosphate in glioma cellsEnkhzol Malchinkhuu, Fumikazu Okajima, Kōichi Sato et al.|Oncogene|2005Cited by 85
Mechanism and Role of High Density Lipoprotein-induced Activation of AMP-activated Protein Kinase in Endothelial CellsTakao Kimura, Fumikazu Okajima, Hideaki Tomura et al.|Journal of Biological Chemistry|2009Cited by 79
Sphingosine 1-phosphate receptors mediate stimulatory and inhibitory signalings for expression of adhesion molecules in endothelial cellsTakao Kimura, Fumikazu Okajima, Hideaki Tomura et al.|Cellular Signalling|2005Cited by 76