cAMP inhibits cytokine-induced biosynthesis of tetrahydrobiopterin in human umbilical vein endothelial cells

Masatsugu Ohtsuki, Hiroaki Shiraishi, Taiya Kato, Risa Kuroda, Masahiro Tazawa, Chiho Sumi-Ichinose, Shin Tada, Yasutoshi Udagawa, Mitsuyasu Itoh, Hitoshi Hishida, Hiroshi Ichinose, Toshiharu Nagatsu, Yasumichi Hagino, Takahide Nomura