TDAG8 Is a Proton-sensing and Psychosine-sensitive G-protein-coupled ReceptorJu-Qiang Wang, Fumikazu Okajima, Naoya Murata et al.|Journal of Biological Chemistry|2004Cited by 262
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
LPA 1 receptors mediate stimulation, whereas LPA 2 receptors mediate inhibition, of migration of pancreatic cancer cells in response to lysophosphatidic acid and malignant ascitesMayumi Komachi, Fumikazu Okajima, Hideaki Tomura et al.|Carcinogenesis|2009Cited by 69
Characterization of Imidazopyridine Compounds as Negative Allosteric Modulators of Proton-Sensing GPR4 in Extracellular Acidification-Induced ResponsesAyaka Tobo, Fumikazu Okajima, Masayuki Tobo et al.|PLoS ONE|2015Cited by 43