ヤスヤマ　コウジ   Kouji Yasuyama   泰山　浩司    所属   川崎医療福祉大学  リハビリテーション学部 言語聴覚療法学科    職種   特任教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Synaptic connections between pigment-dispersing factor-immunoreactive neurons and neurons in the pars lateralis of the blowfly Protophormia terranovae.
掲載誌名	正式名：The Journal of Comparative Neurology 略　 称：J. Comp. Neurol ISSNコード：00219967
巻・号・頁	491(4),pp.390-399
著者・共著者	Hamanaka Yoshitaka, Yasuyama Kouji, Numata Hideharu, Shiga Sakiko
発行年月	2005/10
概要	In females of the blow fly Protophormia terraenovae, neurons with cell bodies in the pars lateralis (PL) projecting to the retrocerebral complex (designated as PL neurons) are necessary for the induction of reproductive diapause under short-day and low-temperature conditions. In the present study, neural connections between PL neurons and pigment-dispersing factor (PDF)-immunoreactive neurons were examined via immunolight microscopy and immunoelectron microscopy combined with backfills through the cardiac-recurrent nerve. Immunolight microscopy showed that fibers of PL neurons overlapped with PDF-immunoreactive fibers in the dorsolateral region of the superior protocerebral neuropil. immunoelectron microscopy showed that PDFimmunoreactive fibers formed output synapses with fibers of PL neurons and unlabeled neurons in a region dorsoanteriorly located with respect to the calyx of the mushroom body. The distribution of synaptic connections between PDF-immunoreactive fibers and the fibers of PL neurons was sparse. According to the projection patterns, PDF-immunoreactive fibers with synaptic connections with PL neurons appeared to originate from PDF-immunoreactive neurons with cell bodies at the base of the medulla of the optic lobe (medulla PDF neurons), which are putative circadian clock neurons in P. terraenovae. PDF immunoreactivity was restrictively detected in dense-core vesicles but not in clear synaptic vesicles. The present results suggest that medulla PDF neurons convey time or photoperiodic information to PL neurons for diapause induction through direct synaptic connections.
DOI	10.1002/cne.20712