Stimulatory effects of neuropeptide Y on the growth of orange-spotted grouper (Epinephelus coioides)

Wu, Shengxi; Li, Bo; Lin, Haoran; Li, Wensheng

doi:10.1016/j.ygcen.2012.08.010

Cited by 22 publications

(16 citation statements)

References 59 publications

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“…Results from cow ( Bos primigenius ), however, show that npy upregulation coincides with the onset of follicular development (Hulshof et al, ). npy is an important regulator of energy homeostasis in fish and mammals (Wu et al, ), so upregulation of local npy expression as well as other players in nervous system signaling may indicate activation of processes important for energy uptake and rapid oocyte growth during early vitellogenesis. A similar process may occur during late‐vitellogenesis as well, since the dopaminergic synapse pathway is upregulated at that stage.…”

Section: Discussionmentioning

confidence: 99%

Global transcriptome analysis identifies regulated transcripts and pathways activated during oogenesis and early embryogenesis in atlantic cod

Kleppe

Edvardsen

Furmanek

et al. 2014

Molecular Reproduction Devel

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The molecular mechanisms underlying oogenesis and maternally controlled embryogenesis in fish are not fully understood, especially in marine species. Our aim was to study the egg and embryo transcriptome during oogenesis and early embryogenesis in Atlantic cod. Follicles from oogenesis stages (pre-, early-, and late-vitellogenic), ovulated eggs, and two embryonic stages (blastula, gastrula) were collected from broodstock fish and fertilized eggs. Gene expression profiles were measured in a 44 K oligo microarray consisting of 23,000 cod genes. Hundreds of differentially expressed genes (DEGs) were identified in the follicle stages investigated, implicating a continuous accumulation and degradation of polyadenylated transcripts throughout oogenesis. Very few DEGs were identified from ovulated egg to blastula, showing a more stable maternal RNA pool in early embryonic stages. The highest induction of expression was observed between blastula and gastrula, signifying the onset of zygotic transcription. During early vitellogenesis, several of the most upregulated genes are linked to nervous system signaling, suggesting increasing requirements for ovarian synaptic signaling to stimulate the rapid growth of oocytes. Highly upregulated genes during late vitellogenesis are linked to protein processing, fat metabolism, osmoregulation, and arrested meiosis. One of the genes with the highest upregulation in the ovulated egg is involved in oxidative phosphorylation, reflecting increased energy requirements during fertilization and the first rapid cell divisions of early embryogenesis. In conclusion, this study provides a large-scale presentation of the Atlantic cod's maternally controlled transcriptome in ovarian follicles through oogenesis, ovulated eggs, and early embryos. Mol. Reprod. Dev. 81: 619–635, 2014. © 2014 Wiley Periodicals, Inc.

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Section: Discussionmentioning

confidence: 99%

Global transcriptome analysis identifies regulated transcripts and pathways activated during oogenesis and early embryogenesis in atlantic cod

Kleppe

Edvardsen

Furmanek

et al. 2014

Molecular Reproduction Devel

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“…In some species, such as Atlantic cod ( Gadus morhua ) (26), tiger puffer (23), snakeskin gourami ( Trichogaster pectoralis ) (27), Brazilian flounder (25), channel catfish (28), and cobia ( Rachycentron canadum ) (29), npy brain expression levels are high around feeding time and decrease post-feeding, further suggesting a role of Npy as a short-term appetite stimulator in fish. Npy treatments have also been shown to stimulate fish growth/growth hormone (GH) secretion both in vitro [goldfish (30)] and in vivo [tilapia ( Oreochromis mossambicus ) (17, 31); orange-spotted grouper ( Epinephelus coioides ) (32)].…”

Section: Central Controlmentioning

confidence: 99%

Appetite-Controlling Endocrine Systems in Teleosts

et al. 2017

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Mammalian studies have shaped our understanding of the endocrine control of appetite and body weight in vertebrates and provided the basic vertebrate model that involves central (brain) and peripheral signaling pathways as well as environmental cues. The hypothalamus has a crucial function in the control of food intake, but other parts of the brain are also involved. The description of a range of key neuropeptides and hormones as well as more details of their specific roles in appetite control continues to be in progress. Endocrine signals are based on hormones that can be divided into two groups: those that induce (orexigenic), and those that inhibit (anorexigenic) appetite and food consumption. Peripheral signals originate in the gastrointestinal tract, liver, adipose tissue, and other tissues and reach the hypothalamus through both endocrine and neuroendocrine actions. While many mammalian-like endocrine appetite-controlling networks and mechanisms have been described for some key model teleosts, mainly zebrafish and goldfish, very little knowledge exists on these systems in fishes as a group. Fishes represent over 30,000 species, and there is a large variability in their ecological niches and habitats as well as life history adaptations, transitions between life stages and feeding behaviors. In the context of food intake and appetite control, common adaptations to extended periods of starvation or periods of abundant food availability are of particular interest. This review summarizes the recent findings on endocrine appetite-controlling systems in fish, highlights their impact on growth and survival, and discusses the perspectives in this research field to shed light on the intriguing adaptations that exist in fish and their underlying mechanisms.

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“…However, more comparative studies in different animals with varying life histories are needed for the understanding of evolution of regulation of energy balance in vertebrates (Crespi et al, 2004). Neuropeptide Y significantly increases food intake and growth rate in the Nile tilapia Oreochromis niloticus (Kiris et al, 2007), the estuarine cod Epinephelus coioides and the olive flounder Paralichthys olivaceus (Wu et al, 2012;Li et al, 2017). Neuropeptide Y levels are increased following exposure to food deficiency in the goldfish Carassius auratus (Lopez-Patino et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Effect of food deprivation on neuropeptide Y immunoreactivity and concurrent biochemical and gonadal responses in tilapia Oreochromis mossambicus (Peters, 1852)

Vijayalaxmi¹,

Shyamannavar²,

Patil³

et al. 2019

Indian J. Fish.

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The effect of short- and long-term fasting on neuropeptide Y (NPY) secreting neurons in the brain and concurrent biochemical and gonadal responses were determined in the cichlid fish Oreochromis mossambicus (Peters, 1852). Exposure of fish to fasting for 6 or 12 days resulted in intensely stained NPY-immunoreactive neurons in the nucleus entopeduncularis and the nucleus preopticus regions of the brain in contrast to moderately stained neurons in control fishes, whereas food supplementation after 6 days starvation restored NPY-immunoreactive profile to the same state as in control groups in both male and female fish. The gonadosomatic index remained significantly lower in female fishes subjected to fasting alone as well as fasting followed by refeedings compared to controls. While the hepatosomatic index (HSI) also showed a significant decrease in fasting male and female fish compared to controls, it increased subsequently in fishes exposed to refeeding after starvation. In addition, a significant decrease in the serum levels of glucose and triglycerides as well as the hepatic tissue protein content in fasting fish compared to those of controls in both sexes suggested gluconeogenesis. Although the serum levels of glucose and triglycerides were reinstated in both males and female fishes subjected to starvation and refeeding, the hepatic tissue protein levels were not completely restored in females. Collectively, these results suggest that food-deprivation, either for short or long term duration, significantly increases the secretory activity of NPY neurons in the brain concomitant with a significant decrease in the serum levels of glucose and triglycerides, the hepatic tissue protein content and the GSI in both sexes. Although males recovered from the effects of starvation following refeeding, females appeared to be more vulnerable to the effects of fasting.

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Stimulatory effects of neuropeptide Y on the growth of orange-spotted grouper (Epinephelus coioides)

Cited by 22 publications

References 59 publications

Global transcriptome analysis identifies regulated transcripts and pathways activated during oogenesis and early embryogenesis in atlantic cod

Global transcriptome analysis identifies regulated transcripts and pathways activated during oogenesis and early embryogenesis in atlantic cod

Appetite-Controlling Endocrine Systems in Teleosts

Effect of food deprivation on neuropeptide Y immunoreactivity and concurrent biochemical and gonadal responses in tilapia Oreochromis mossambicus (Peters, 1852)

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