Expression of three GnRH receptors in specific tissues in male and female sea lampreys Petromyzon marinus at three distinct life stages

Hall, Jeffrey A.; Decatur, Wayne A.; Daukss, Dana; Hayes, Mary K.; Marquis, Timothy J.; Morin, Scott J.; Kelleher, Thomas F.; Sower, Stacia A.

doi:10.3389/fnins.2013.00088

Cited by 11 publications

(7 citation statements)

References 40 publications

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“…The presence of GnRH fibres and GnRH receptors in the habenula-IPN pathway has also been demonstrated in non-mammalian vertebrates including teleosts (Muske & Moore, 1994;Soga et al, 2005). In sea lampreys (Petromyzon marinus), females show intense expression of the GnRH receptor (lGnRH-R-1) gene compared with males (Hall et al, 2013), suggesting that GnRH is involved in modulation of reproductive functions within the habenula-IPN pathway (which may be evolutionarily conserved in vertebrates). Importantly, in fish, GnRH neurobiology is susceptible to endocrine-disrupting chemicals such as triphenyl phosphate (a flame retardant) and pesticides (Rhee et al, 2008;Vosges et al, 2010;Piazza, Pandolfi & Nostro, 2011;Liu et al, 2013) and GnRH secretion modes tend to be more affected by environmental cues than in mammals (Dawson, 1998).…”

Section: Role Of Hormone Receptors and Neuropeptides In The Social Brain Networkmentioning

confidence: 94%

Fish as a model in social neuroscience: conservation and diversity in the social brain network

2021

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Mechanisms for fish social behaviours involve a social brain network (SBN) which is evolutionarily conserved among vertebrates. However, considerable diversity is observed in the actual behaviour patterns amongst nearly 30000 fish species. The huge variation found in socio-sexual behaviours and strategies is likely generated by a morphologically and genetically well-conserved small forebrain system. Hence, teleost fish provide a useful model to study the fundamental mechanisms underlying social brain functions. Herein we review the foundations underlying fish social behaviours including sensory, hormonal, molecular and neuroanatomical features. Gonadotropin-releasing hormone neurons clearly play important roles, but the participation of vasotocin and isotocin is also highlighted. Genetic investigations of developing fish brain have revealed the molecular complexity of neural development of the SBN. In addition to straightforward social behaviours such as sex and aggression, new experiments have revealed higher order and unique phenomena such as social eavesdropping and social buffering in fish. Finally, observations interpreted as 'collective cognition' in fish can likely be explained by careful observation of sensory determinants and analyses using the dynamics of quantitative scaling. Understanding of the functions of the SBN in fish provide clues for understanding the origin and evolution of higher social functions in vertebrates.

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Section: Role Of Hormone Receptors and Neuropeptides In The Social Brain Networkmentioning

confidence: 94%

Fish as a model in social neuroscience: conservation and diversity in the social brain network

2021

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“…Internal factors also contribute to modulating melatonin production; among these are oestradiol and glucocorticoids ( O. mykiss 94,95 ), adenosine and catecholamines (northern pike, Esox lucius 96 ), melatonin ( O. mykiss and goldlined spinefoot, Siganus guttatus 97,98 ) and GnRH2 (gonadotrophin‐releasing hormone 2; D. labrax 99 ). Finally, although their function remains unknown, nerve endings containing LPRXamide, an orthologue of gonadotrophin‐inhibiting hormone (GnIH), have been observed in D labrax pineal, 100 and mRNA corresponding to GnIH‐, ghrelin‐ and thyrotrophin‐releasing hormone‐receptors, have been identified in the pineal of the sea lamprey ( Petromyzon marinus ), 101 goldfish ( Carassius auratus ) 102 and medaka ( Oryzias latipes ) 103 respectively.…”

Section: The Pineal Gland and Its Messengersmentioning

confidence: 99%

Melatonin and osmoregulation in fish: A focus on Atlantic salmon Salmo salar smoltification

Nisembaum

Martin²,

Lecomte

et al. 2021

J Neuroendocrinology

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Part of the life cycle of several fish species includes important salinity changes, as is the case for the sea bass (Dicentrarchus labrax) or the Atlantic salmon (Salmo salar). Salmo salar juveniles migrate downstream from their spawning sites to reach seawater, where they grow and become sexually mature. The process of preparation enabling juveniles to migrate downstream and physiologically adapt to seawater is called smoltification. Daily and seasonal variations of photoperiod and temperature play a role in defining the timing of smoltification, which may take weeks to months, depending on the river length and latitude. Smoltification is characterised by a series of biochemical, physiological and behavioural changes within the neuroendocrine axis. This review discusses the current knowledge and gaps related to the neuroendocrine mechanisms that mediate the effects of light and temperature on smoltification. Studies performed in S. salar and other salmonids, as well as in other species undergoing important salinity changes, are reviewed, and a particular emphasis is given to the pineal hormone melatonin and its possible role in osmoregulation. The daily and annual variations of plasma melatonin levels reflect corresponding changes in external photoperiod and temperature, which suggests that the hormonal time‐keeper melatonin might contribute to controlling smoltification. Here, we review studies on (i) the impact of pinealectomy and/or melatonin administration on smoltification; (ii) melatonin interactions with hormones involved in osmoregulation (e.g., prolactin, growth hormone and cortisol); (iii) the presence of melatonin receptors in tissues involved in osmoregulation; and (iv) the impacts of salinity changes on melatonin receptors and circulating melatonin levels. Altogether, these studies show evidence indicating that melatonin interacts with the neuroendocrine pathways controlling smoltification, although more information is needed to clearly decipher its mechanisms of action.

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“…The only specificity of interaction was found for lGnRH-I which was only capable of stimulating signal transduction via the lGnRH-R 1 (24, 35). The distribution of expression of lamprey GnRH receptors as reported from RT-PCR and in situ experiments (36, 37) includes the pituitary for all isoforms but also a much wider diversity of brain areas, including neuronal populations in the telencephalon, epithalamus, thalamus, preoptic area, and in the midbrain. Some sexual dimorphic features of this distribution was also noted (37).…”

Section: Lamprey Gnrh Systemmentioning

confidence: 99%

“…In the only instance where lGnRH-II transcripts were reported in the olfactory bulb the in situ results could not be reproduced by immunohistochemistry (24). More recently receptor transcripts for lamprey GnRH-R 3 were detected in the olfactory bulb of females but not in males (37). …”

Section: Pheromonal Communication In Lampreymentioning

confidence: 99%

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Integrative Neuro-Endocrine Pathways in the Control of Reproduction in Lamprey: A Brief Review

Freamat

Sower

2013

Front. Endocrinol.

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The gonadotropin-releasing hormone (GnRH) system is well known as the main regulator of reproductive physiology in vertebrates. It is also part of a network of brain structures and pathways that integrate information from the internal and external milieu and coordinate the adaptive behavioral and physiological responses to social and reproductive survival needs. In this paper we review the state of knowledge of the GnRH system in relation to the behavior, external, and internal factors that control reproduction in one of the oldest lineage of vertebrates, the lampreys.

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Expression of three GnRH receptors in specific tissues in male and female sea lampreys Petromyzon marinus at three distinct life stages

Cited by 11 publications

References 40 publications

Fish as a model in social neuroscience: conservation and diversity in the social brain network

Fish as a model in social neuroscience: conservation and diversity in the social brain network

Melatonin and osmoregulation in fish: A focus on Atlantic salmon Salmo salar smoltification

Integrative Neuro-Endocrine Pathways in the Control of Reproduction in Lamprey: A Brief Review

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