A
A T Suyama
Publications - 8
Citations - 136
A T Suyama is an academic researcher. The author has contributed to research in topics: Internal medicine & Medicine. The author has an hindex of 1, co-authored 1 publications receiving 133 citations.
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Journal ArticleDOI
Inhibition of replication of normal adrenocortical cells in culture by adrenocorticotropin.
J Ramachandran,A T Suyama +1 more
TL;DR: The results suggest that the major role of ACTH is to induce the transformation of the undifferentiated cells of the adrenal gland into functional fasciculata cells and that the proliferation of adrenocortical cells may be under control of factors other than ACTH.
Journal ArticleDOI
Oxytocin enhances progesterone production with upregulation of BMP-15 activity by granulosa cells.
Koichiro Yamamoto,Yasuhiro Nakano,Nahoko Iwata,Yoshiaki Soejima,A T Suyama,Toru Hasegawa,Fumio Otsuka +6 more
TL;DR: In this article , the effects of oxytocin on ovarian steroidogenesis were investigated by utilizing primary culture of rat granulosa cells and human granulo-knucleus KGN cells.
Journal ArticleDOI
ODP407 Effects of Leptin and Ghrelin on Ovarian Steroidogenesis and Involvement of BMP Action in Rat Granulosa Cells.
Yasuhiro Nakano,Chiaki Kashino,Toru Hasegawa,Nahoko Iwata,Yoshiaki Soejima,A T Suyama,Koichiro Yamamoto,Fumio Otsuka +7 more
TL;DR: In this article , the effects of leptin and ghrelin on the ovarian steroidogenesis were investigated using primary culture of rat granulosa cells, by focusing on ovarian bone morphogenetic protein (BMP) system, which plays an important role in follicular development and steroidogenesis.
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Mutual Effects of Orexin and Bone Morphogenetic Proteins on Gonadotropin Expression by Mouse Gonadotrope Cells
Yoshiaki Soejima,Nahoko Iwata,Nanako Nakayama,Shinichi Hirata,Yasuhiro Nakano,Koichiro Yamamoto,A T Suyama,Kohei Oguni,Takahiro Nada,Satoshi Fujisawa,Fumio Otsuka +10 more
TL;DR: The results indicate that orexin regulates gonadotropin expression via clock gene expression by mutually interacting with GnRH action and the pituitary BMP system in gonadotrope cells.
Journal ArticleDOI
Stimulatory effects of vasopressin on progesterone production and BMP signaling by ovarian granulosa cells.
Koichiro Yamamoto,Yasuhiro Nakano,Nahoko Iwata,Yoshiaki Soejima,A T Suyama,Toru Hasegawa,Fumio Otsuka +6 more
TL;DR: In this paper , the effects of arginine vasopressin (AVP) on ovarian steroid production and its functional relationship to the ovarian bone morphogenetic protein (BMP) system were clarified.