Effect of l -tryptophan and melatonin supplementation on the serotonin gastrointestinal content and digestive enzymatic activity for Salmo salar and Oncorhynchus kisutch

Mardones, O.; Devia, E.; Labbé, B.S.; Oyarzún, R.; Vargas‐Chacoff, Luis; Muñoz, J.L.P.

doi:10.1016/j.aquaculture.2017.10.003

Cited by 34 publications

(18 citation statements)

References 50 publications

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“…Studies have reported that L-trp can increase the SOD activity of Apostichopus japonicus Selenka (17). Mardones et al reported that dietary tryptophan significantly reduced cortisol levels in the plasma of Salmo salar and Oncorhynchus kisutch , enhancing their anti-stress ability (50). In rats, a lack of Trp in the diet leads to a decrease in GSH-Px activity in liver tissue.…”

Section: Discussionmentioning

confidence: 99%

Dietary L-Tryptophan Modulates the Hematological Immune and Antibacterial Ability of the Chinese Mitten Crab, Eriocheir sinensis, Under Cheliped Autotomy Stress

Zhang

Song

et al. 2018

Front. Immunol.

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In pond cultures of juvenile Eriocheir sinensis, limb autotomy stress seriously affects and restricts the quality and economic benefits of aquaculture. This study was designed to evaluate the effects of dietary supplementation of L-tryptophan on E. sinensis under the cheliped autotomy stress. In the present study, 252 crabs were divided into four groups: dietary L-trp supplementation with 0.28, 0.40, 0.53, and 0.70%, and their hematological immunity, antioxidant capacity, anti-stress, and antibacterial ability were evaluated after 14 days of using biochemical analysis, flow cytometry, and molecular biology techniques. First, we counted the mortality after 14 days of feeding and found that compared with other treatments, dietary supplementation of 0.53 and 0.70% L-trp significantly lowered the mortality of E. sinensis. Moreover, the total hemocyte count (THC), hemocyanin, and glutathione (GSH) content, and glutathione peroxidase (GSH-Px) activity significantly increased at 7 and 14 d with dietary supplementation of 0.53 and 0.70% L-trp, in contrast with the significant decrease in malondialdehyde (MDA) content at 14 d in the same dietary groups (P<0.05). Next, the bacterial challenge test after 14 days of feeding showed that the THC levels, phagocytic rate, and acid phosphatase (ACP) and alkaline phosphatase (ALP) activity were significantly higher with dietary supplementation of 0.53 and 0.70% L-trp after 12 and 24 h of Aeromonas hydrophila injection, along with a significant improvement in the antioxidant capacity (P<0.05). Further, we measured the expression of antibacterial-related protein genes (EslecB and HSP 90) and found that they were significant up-regulated in the hepatopancreas, hemocytes, intestine, and gill in the groups with dietary supplementation of 0.53% and 0.70% L-trp after 12 h or 24 h of A. hydrophila injection (P<0.05). Taken together, the observations in this study indicate that dietary supplementation of L-trp can enhance the antioxidant capacity and improve the hematological immune status and antibacterial ability of E. sinensis under the cheliped autotomy stress, thereby increasing the survival rate of E. sinensis under cheliped autotomy stress.

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Section: Discussionmentioning

confidence: 99%

Dietary L-Tryptophan Modulates the Hematological Immune and Antibacterial Ability of the Chinese Mitten Crab, Eriocheir sinensis, Under Cheliped Autotomy Stress

Zhang

Song

et al. 2018

Front. Immunol.

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“…Indeed, pinealectomy and/or melatonin administration affected: (i) the processes involving PRL and GH (including plasma and liver electrolyte balance, body fat content, plasma lipids, liver glycogen levels); (ii) the size of PRL producing cells in the pituitary and plasma PRL levels; and (iii) the plasmatic cortisol and thyroid hormones. 39,[167][168][169][170][171][172] Many of these effects depended on the season. However, which of the neural or hormonal messages elaborated by the pineal was contributing to these responses, remained enigmatic.…”

Section: The Photi C Informati On the Pine Al And The Adap Tati Omentioning

confidence: 99%

“…or i.m. injections 171,188 or enriched diets 170,189 have been used to investigate the effects of melatonin in salmonids.…”

Section: Effects Of In Vivo Melatonin Administrationmentioning

confidence: 99%

“…Further findings evoked the suspicion of an interaction of the pineal gland with factors involved in the adaptation to salinity changes in salmonids and other fish species. Indeed, pinealectomy and/or melatonin administration affected: (i) the processes involving PRL and GH (including plasma and liver electrolyte balance, body fat content, plasma lipids, liver glycogen levels); (ii) the size of PRL producing cells in the pituitary and plasma PRL levels; and (iii) the plasmatic cortisol and thyroid hormones 39,167‐172 . Many of these effects depended on the season.…”

Section: The Photic Information the Pineal And The Adaptation To Salmentioning

confidence: 99%

“…or i.m. injections 171,188 or enriched diets 170,189 have been used to investigate the effects of melatonin in salmonids. In O. mykiss parr, melatonin implants induced increases in the proliferation and differentiation of chloride cells and NKA activity in the gills in early December (within 3 weeks of implant administration) 187 .…”

Section: The Photic Information the Pineal And The Adaptation To Salmentioning

confidence: 99%

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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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Effects of a temperature rise on melatonin and thyroid hormones during smoltification of Atlantic salmon, Salmo salar

Nisembaum

Martin²,

Fuentès

et al. 2020

J Comp Physiol B

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Effect of l -tryptophan and melatonin supplementation on the serotonin gastrointestinal content and digestive enzymatic activity for Salmo salar and Oncorhynchus kisutch

Cited by 34 publications

References 50 publications

Dietary L-Tryptophan Modulates the Hematological Immune and Antibacterial Ability of the Chinese Mitten Crab, Eriocheir sinensis, Under Cheliped Autotomy Stress

Dietary L-Tryptophan Modulates the Hematological Immune and Antibacterial Ability of the Chinese Mitten Crab, Eriocheir sinensis, Under Cheliped Autotomy Stress

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

Effects of a temperature rise on melatonin and thyroid hormones during smoltification of Atlantic salmon, Salmo salar

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