Interaction between neuropeptide Y immunoreactive neurons and galanin immunoreactive neurons in the brain of the masu salmon, Oncorhynchus masou

Amano, Masafumi; Amiya, Noriko; Hiramatsu, Mikiko; Tomioka, Takuma; Oka, Yoshitaka

doi:10.1016/j.neulet.2009.06.067

Cited by 11 publications

(9 citation statements)

References 27 publications

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“…The NLT and Hv may be associated with feeding control in fish as well. Studies have demonstrated that several important neuropeptides associated with food intake are expressed in the NLT and Hv, including npy, pomc, mch, and crh (Castro et al 1999, Cerdá-Reverter et al 2000, Pepels et al 2002, Alderman & Bernier 2007, Amano et al 2009, Berman et al 2009). Although we do not know whether these genes are also localized in the NLT and Hv in the orange-spotted grouper, studies in other fish species have demonstrated that the functions and localizations of these peptides in the brain are well conserved (reviewed by Lin et al (2000), Volkoff et al (2005) and Matsuda et al (2012)).…”

Section: Discussionmentioning

confidence: 99%

Distinct functions of neuromedin u and neuromedin s in orange-spotted grouper

Xiao

Liu

et al. 2015

Journal of Molecular Endocrinology

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Neuromedin U (NMU) and neuromedin S (NMS) play inhibitory roles in the regulation of food intake and energy homeostasis in mammals. However, their functions are not clearly established in teleost fish. In the present study, nmu and nms homologs were identified in several fish species. Subsequently, their cDNA sequences were cloned from the orange-spotted grouper (Epinephelus coioides). Sequence analysis showed that the orangespotted grouper Nmu proprotein contains a 21-amino acid mature Nmu peptide (Nmu-21). The Nms proprotein lost the typical mature Nms peptide, but it retains a putative 34-amino acid peptide (Nmsrp). In situ hybridization revealed that nmu-and nms-expressing cells are mainly localized in the hypothalamic regions associated with appetite regulation. Food deprivation decreased the hypothalamic nmu mRNA levels but induced an increase of nms mRNA levels. Periprandial expression analysis showed that hypothalamic expression of nmu increased significantly at 3 h post-feeding, while nms expression was elevated at the normal feeding time. I.p. injection of synthetic Nmu-21 peptide suppressed the hypothalamic neuropeptide y (npy) expression, while Nmsrp administration significantly increased the expression of npy and orexin in orange-spotted grouper. Furthermore, the mRNA levels of LH beta subunit (lhb) and gh in the pituitary were significantly down-regulated after Nmu-21 peptide administration, while Nmsrp was able to significantly stimulate the expression of FSH beta subunit (fshb), prolactin (prl), and somatolaction (sl). Our results indicate that nmu and nms possess distinct neuroendocrine functions and pituitary functions in the orange spotted grouper.

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Section: Discussionmentioning

confidence: 99%

Distinct functions of neuromedin u and neuromedin s in orange-spotted grouper

Xiao

Liu

et al. 2015

Journal of Molecular Endocrinology

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“…In the masu salmon (275) and the Siberian sturgeon (170), NPY and GAL neurons make reciprocal connections. In the medaka, orexin and MCH neurons send neuronal fibers to each other (156).…”

Section: Interactions Among Neuropeptides To Control Feedingmentioning

confidence: 99%

Central Pathways Integrating Metabolism and Reproduction in Teleosts

2014

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Energy balance plays an important role in the control of reproduction. However, the cellular and molecular mechanisms connecting the two systems are not well understood especially in teleosts. The hypothalamus plays a crucial role in the regulation of both energy balance and reproduction, and contains a number of neuropeptides, including gonadotropin-releasing hormone (GnRH), orexin, neuropeptide-Y, ghrelin, pituitary adenylate cyclase-activating polypeptide, α-melanocyte stimulating hormone, melanin-concentrating hormone, cholecystokinin, 26RFamide, nesfatin, kisspeptin, and gonadotropin-inhibitory hormone. These neuropeptides are involved in the control of energy balance and reproduction either directly or indirectly. On the other hand, synthesis and release of these hypothalamic neuropeptides are regulated by metabolic signals from the gut and the adipose tissue. Furthermore, neurons producing these neuropeptides interact with each other, providing neuronal basis of the link between energy balance and reproduction. This review summarizes the advances made in our understanding of the physiological roles of the hypothalamic neuropeptides in energy balance and reproduction in teleosts, and discusses how they interact with GnRH, kisspeptin, and pituitary gonadotropins to control reproduction in teleosts.

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“…As is the case for midshipman, Gal‐expressing neurons have been largely identified in the POA‐AH with fewer in other regions of the hypothalamus of all teleosts investigated to date. There is variation between species in that some have detectable Gal‐ir somata in parvocellular nuclei only (Amano et al, ; Anglade et al, ; Batten et al, ; Olivereau & Olivereau, ; Yamamoto et al, ), while others also show somata in magnocellular populations (Cornbrooks & Parsons, ; Holmqvist & Ekstrom, ; Jadhao & Meyer, ; Jadhao & Pinelli, ; Magliulo‐Cepriano et al, ; Prasada Rao et al, ). Additionally, Gal prohormone mRNA is found in the POA‐AH of the African cichlid Astatotilapia burtoni (Hu et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…The distribution of Gal expression in the brain has been mapped for several of the major lineages of bony vertebrates, including teleost fish (Amano, Amiya, Hiramatsu, Tomioka, & Oka, ; Anglade et al, ; Batten, Moons, Cambre, & Vandesande, ; Cornbrooks & Parsons, ; Holmqvist & Ekstrom, ; Jadhao & Pinelli, ; Magliulo‐Cepriano, Schreibman, & Blum, ; Olivereau & Olivereau, ; Prasada Rao, Murthy, Cook, & Peter, ; Yamamoto, Maler, & Nagy, ), amphibians (Lázár et al, ; Olivereau & Olivereau, ), reptiles (Jiménez, Mancera, Pérez‐Fígares, & Fernández‐Llebrez, ), birds (Azumaya & Tsutsui, ; Jozsa & Mess, ; Klein, Jurkevich, & Grossman, ), and mammals (Gentleman et al, ; Kordower & Mufson, ; Skofitsch & Jacobowitz, ). Shared patterns for the location of Gal‐immunoreactive (ir) neurons and fibers include Gal‐ir neuron populations in the preoptic area (POA) and hypothalamus, and Gal‐ir processes broadly distributed throughout the brain.…”

Section: Introductionmentioning

confidence: 99%

Galanin immunoreactivity is sexually polymorphic in neuroendocrine and vocal‐acoustic systems in a teleost fish

Tripp

Bass

2019

J of Comparative Neurology

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Galanin is a peptide that regulates pituitary hormone release, feeding, and reproductive and parental care behaviors. In teleost fish, increased galanin expression is associated with territorial, reproductively active males. Prior transcriptome studies of the plainfin midshipman (Porichthys notatus), a highly vocal teleost fish with two male morphs that follow alternative reproductive tactics, show that galanin is upregulated in the preoptic area-anterior hypothalamus (POA-AH) of nest-holding, courting type I males during spawning compared to cuckolding type II males. Here, we investigate possible differences in galanin immunoreactivity in the brain of both male morphs and females with a focus on vocal-acoustic and neuroendocrine networks. We find that females differ dramatically from both male morphs in the number of galanin-expressing somata and in the distribution of fibers, especially in brainstem vocal-acoustic nuclei and other sensory integration sites that also differ, though less extensively, between the male morphs. Double labeling shows that primarily separate populations of POA-AH neurons express galanin and the nonapeptides arginine-vasotocin or isotocin, homologues of mammalian arginine vasopressin and oxytocin that are broadly implicated in neural mechanisms of vertebrate social behavior including morph-specific actions on vocal neurophysiology in midshipman. Finally, we report a small population of POA-AH neurons that coexpress galanin and the neurotransmitter γ-aminobutyric acid. Together, the results indicate that galanin neurons in midshipman fish likely modulate brain activity at a broad scale, including targeted effects on vocal motor, sensory and neuroendocrine systems; are unique from nonapeptide-expressing populations; and play a role in male-specific behaviors. Abbreviations: ac, anterior commissure; AH, anterior hypothalamus; AT, anterior tuberal nucleus of hypothalamus; Cc, cerebellar crest; Cg, granule cell layer of the corpus of the cerebellum; Cm, molecular layer of the cerebellum; CP, central posterior nucleus; Cpost, posterior commissure; D, area dorsalis of telencephalon; Dc, central zone of D; Dd, dorsal zone of D; DIL, diffuse nucleus of the inferior lobe; DiV, diencephalic ventricle; Dl, lateral zone of D; Dm, medial zone of D; Dm-p, posterior division of Dm; DOdm, dorsomedial division of descending octaval nucleus; DOri/I, rostral intermediate/intermediate division of descending octaval nucleus; DPo, dorsal posterior nucleus of the thalamus; Hb, habenula; Hd, dorsal zone, periventricular hypothalamus; HoCo, horizontal commissure; HV, hindbrain ventricle; Hv, ventral zone, periventricular hypothalamus; IP, isthmal paraventricular nucleus; IS, isthmal auditory-vocal nucleus; LH, lateral hypothalamus; ll, lateral lemniscus; MED, cell plate of medial octavolateralis nucleus; MLF, medial longitudinal fasciculus; MV, midbrain ventricle; nLL, nucleus of the lateral lemniscus; OB, olfactory bulb; OEN, octaval efferent nucleus; On, olfactory nerve; Opn, optic nerve; PAG, periaqueductal ...

show abstract

Interaction between neuropeptide Y immunoreactive neurons and galanin immunoreactive neurons in the brain of the masu salmon, Oncorhynchus masou

Cited by 11 publications

References 27 publications

Distinct functions of neuromedin u and neuromedin s in orange-spotted grouper

Distinct functions of neuromedin u and neuromedin s in orange-spotted grouper

Central Pathways Integrating Metabolism and Reproduction in Teleosts

Galanin immunoreactivity is sexually polymorphic in neuroendocrine and vocal‐acoustic systems in a teleost fish

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