Perinatal development of circadian melatonin production in domestic chicks

Zeman, Michal; Gwinner, Eberhard; Herichová, Iveta; Lamošová, D; Košťál, Ľubor

doi:10.1111/j.1600-079x.1999.tb00563.x

Cited by 50 publications

(60 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Ubuka et al (3), GnIH begins its function around the time of hatching and acts as a hypothalamic factor to regulate gonadotropin release in quail. It has also been reported that melatonin synthesis and secretion begin during late-embryonic life in the chicken (30)(31)(32). From the present and previous studies, we suspect that the action of melatonin on GnIH expression begins around the time of hatching, and remains during development and in adulthood.…”

Section: Figmentioning

confidence: 58%

Melatonin induces the expression of gonadotropin-inhibitory hormone in the avian brain

Ubuka

Bentley

Ukena

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

297

251

View full text Add to dashboard Cite

We recently identified a novel hypothalamic neuropeptide inhibiting gonadotropin release in quail and termed it gonadotropininhibitory hormone (GnIH). Cell bodies and terminals containing the dodecapeptide GnIH are localized in the paraventricular nucleus (PVN) and median eminence, respectively. To understand the physiological role of GnIH, we investigated the mechanisms that regulate GnIH expression. In this study, we show that melatonin originating from the pineal gland and eyes induces GnIH expression in the quail brain. Pinealectomy (Px) combined with orbital enucleation (Ex) (Px plus Ex) decreased the expression of GnIH precursor mRNA and content of mature GnIH peptide in the diencephalon, which includes the PVN and median eminence. Melatonin administration to Px plus Ex birds caused a dosedependent increase in expression of GnIH precursor mRNA and production of mature peptide. The expression of GnIH was photoperiodically controlled and increased under short-day photoperiods, when the duration of melatonin secretion increases. To identify the mode of melatonin action on GnIH induction, we investigated the expression of Mel 1c, a melatonin receptor subtype, in GnIH neurons. In situ hybridization of Mel1c mRNA combined with immunocytochemistry for GnIH revealed that Mel 1c mRNA was expressed in GnIH-immunoreactive neurons in the PVN. Melatonin receptor autoradiography further revealed specific binding of melatonin in the PVN. These results indicate that melatonin is a key factor for GnIH induction. Melatonin appears to act directly on GnIH neurons through its receptor to induce GnIH expression. This is the first demonstration, to our knowledge, of a direct action of melatonin on neuropeptide induction in any vertebrate class. melatonin receptor ͉ photoperiod ͉ reproduction

show abstract

Section: Figmentioning

confidence: 58%

Melatonin induces the expression of gonadotropin-inhibitory hormone in the avian brain

Ubuka

Bentley

Ukena

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

297

251

View full text Add to dashboard Cite

show abstract

“…It is possible that effect off different wavelengths on the opsins could be the mechanisms or part of the mechanism that is altering physiology during embryogenesis, that has resulted in the observed increases hatchability and decreases fear response and stress susceptibility. We know that light stimulation during incubation alters brain development (Rogers and Krebs, 1996) and hormone levels (Zeman et al, 1999) during development. Both of these have been noted to change behavior (Rogers and Workman, 1989) and physiology (Nelson and Demas, 1997) as well.…”

Section: Discussionmentioning

confidence: 99%

Exposing broiler eggs to green, red and white light during incubation

Archer

2017

Animal

View full text Add to dashboard Cite

Previous work has shown that exposing broiler eggs to white light during incubation can improve hatchability and post-hatch animal welfare. It was hypothesized that due to how different wavelengths of light can affect avian physiology differently, and how pigmented eggshells filter light that different monochromatic wavelengths would have differential effects on hatchability and post-hatch animal welfare indicators. To determine, we incubated chicken eggs (n = 6912) under either no light (dark), green light, red light or white light; the light level was 250 lux. White and red light were observed to increase hatch of fertile ( P < 0.05) over dark and green light incubated eggs. White, red and green light exposure during incubation improved ( P < 0.05) the proportion of non-defect chicks over dark incubated eggs. Post-hatch 45-day weight and feed conversion was not affected by light exposure of any wavelength ( P > 0.05). Fear response of during isolation and tonic immobility was reduced ( P < 0.05) in broilers incubated under white or red light when compared with either green or dark broilers. Broilers incubated with white or red light had lower ( P < 0.05) composite asymmetry scores and higher ( P < 0.05) humoral immunity titers than dark incubated broilers, however, green light broilers did not differ ( P > 0.05) from dark incubated broilers. All light incubated broilers had lower ( P < 0.05) plasma corticosterone and higher ( P < 0.05) plasma serotonin concentrations than dark incubated broilers. These results indicate that white light and red light that is a component of it are possibly the key spectrum to improving hatchability and lower fear and stress susceptibility, whereas green light is not as effective. Incubating broiler eggs under these spectrums could be used to improve hatchery efficiency and post-hatch animal welfare at the same time.

show abstract

“…In particular, when chicks were exposed to 12L:12D during prehatch Days 13 to 18 and tested during their subjective day, they had shorter tonic-immobility durations than when chicks were tested during their subjective night. This provides evidence that the endogenous clock becomes functional and can respond to light cues late in incubation (Nichelmann, Höchel, & Tzschentke, 1999;Zeman, Gwinner, Herichová, Lamosová, & Kost'ál, 1999).…”

Section: Resultsmentioning

confidence: 91%

Prehatch entrainment of circadian rhythms in the domestic chick using different light regimes

Hill¹,

Bassi²,

Bonaventura³

et al. 2004

Developmental Psychobiology

View full text Add to dashboard Cite

The onset of circadian rhythms in many animals occurs during prenatal development. We conducted four experiments, using the domestic chick as a model, to assess when these rhythms can first be entrained and the type of light zeitgeber necessary. In Experiment 1, the presence of circadian rhythms was assessed using tonic immobility, an antipredator behavior, whereas in Experiments 2 to 4 body temperature was studied. We demonstrate that (a) circadian rhythms can be entrained during the late stage of the chick's 21-day incubation period (prehatch Days 13-18), (b) only 1 day of light cues [12:12 hr light:dark (12L:12D)] on prehatch Day 13 is necessary for entrainment, and (c) short bouts of light, which simulate the light cues embryos typically experience during natural incubation, can act as zeitgebers although they are not as effective as 12L:12D. The onset of entrainment is earlier than predicted and suggests that the brain structures mediating circadian rhythms mature sooner than proposed by previous research.

show abstract

Perinatal development of circadian melatonin production in domestic chicks

Cited by 50 publications

References 23 publications

Melatonin induces the expression of gonadotropin-inhibitory hormone in the avian brain

Melatonin induces the expression of gonadotropin-inhibitory hormone in the avian brain

Exposing broiler eggs to green, red and white light during incubation

Prehatch entrainment of circadian rhythms in the domestic chick using different light regimes

Contact Info

Product

Resources

About