Double immunocytochemistry of vasoactive intestinal peptide and cGnRH-I in male quail: photoperiodic effects

Cell and Tissue Research
R Teruyama, M M Beck

Abstract

Reproduction in Japanese quail is primarily regulated by photoperiod. Vasoactive intestinal peptide (VIP) has been suggested as a transducer of environmental information, especially photoperiodic cues, to the hypothalamo-pituitary-gonadal axis. To investigate the possible interaction of VIP and the reproductive (gonadotropin-releasing hormone, GnRH) system, double-immunocytochemical staining for VIP and cGnRH-I was conducted in sexually mature male quail held under a long-day photoperiod (16L:8D; LD) and in sexually quiescent males held under a short-day photoperiod (8L:16D; SD). VIP-immunoreactive (ir) cells were found primarily in three locations: lateral septal organ (LSO) in nucleus accumbens (Ac), ventral hypothalamus, and infundibular area. VIP-ir cells in LSO displayed characteristics typical of cerebrospinal fluid (CSF)-contacting cells, and co-existed with cGnRH-I-ir cells and beaded fibers. In contrast, VIP-ir cells in the infundibular area did not co-exist with cGnRH-I-ir structures. The number of visible VIP-ir cells in the infundibular area of SD males was significantly lower than that of LD males, while the number of visible VIP-ir cells in Ac/LSO was not altered by photoperiod. A cluster of cGnRH-I-ir cells in th...Continue Reading

Citations

May 10, 2005·Hormones and Behavior·Donna L ManeyChristopher T Goode
Mar 8, 2013·Acta histochemica·Orn-anong ChaiyachetYupaporn Chaiseha
Sep 2, 2008·General and Comparative Endocrinology·Sunantha KosonsirilukYupaporn Chaiseha
May 23, 2008·General and Comparative Endocrinology·Donna L Maney
May 14, 2005·Annals of the New York Academy of Sciences·Peter J Sharp
Feb 19, 2010·Animal Science Journal = Nihon Chikusan Gakkaihō·Gen HiyamaNorio Kansaku
Jun 9, 2016·Animal Reproduction Science·Boonyarit KamkrathokYupaporn Chaiseha

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