Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet
Reared animals for edible or ornamental purposes are frequently exposed to high aggression and stressful situations. These factors generally arise from conspecifics in densely breeding conditions. In vertebrates, serotonin (5-HT) has been postulated as a key neuromodulator and neurotransmitter invol...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166480_v223_n_p27_Morandini http://hdl.handle.net/20.500.12110/paper_00166480_v223_n_p27_Morandini |
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paper:paper_00166480_v223_n_p27_Morandini2023-06-08T14:38:21Z Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet Ramallo, Martín R. Somoza, Gustavo Manuel Pandolfi, Matías Cichlids L-Tryptophan Serotonin Steroid hormones Stress hydrocortisone sex hormone tryptophan hydrocortisone serotonin sex hormone tryptophan adult animal cell animal experiment animal tissue Article brain nerve cell Cichlasoma dimerus cichlid controlled study diet supplementation female growth hypothalamus male nonhuman pretectum priority journal raphe nucleus serotoninergic system stress aggression animal blood brain diet drug effects enzyme immunoassay metabolism physiology sexual behavior social dominance Aggression Animals Brain Cichlids Diet Female Gonadal Steroid Hormones Hierarchy, Social Hydrocortisone Immunoenzyme Techniques Male Serotonin Sexual Behavior Tryptophan Reared animals for edible or ornamental purposes are frequently exposed to high aggression and stressful situations. These factors generally arise from conspecifics in densely breeding conditions. In vertebrates, serotonin (5-HT) has been postulated as a key neuromodulator and neurotransmitter involved in aggression and stress. The essential amino acid l-tryptophan (trp) is crucial for the synthesis of 5-HT, and so, leaves a gateway for indirectly augmenting brain 5-HT levels by means of a trp-enriched diet. The cichlid fish Cichlasoma dimerus, locally known as chanchita, is an autochthonous, potentially ornamental species and a fruitful laboratory model which behavior and reproduction has been studied over the last 15 years. It presents complex social hierarchies, and great asymmetries between subordinate and dominant animals in respect to aggression, stress, and reproductive chance. The first aim of this work was to perform a morphological description of chanchita's brain serotonergic system, in both males and females. Then, we evaluated the effects of a trp-supplemented diet, given during 4 weeks, on brain serotonergic activity, stress and sexual steroid hormones, and growth in isolated specimens. Results showed that chanchita's brain serotonergic system is composed of several populations of neurons located in three main areas: pretectum, hypothalamus and raphe, with no clear differences between males and females at a morphological level. Animals fed with trp-enriched diets exhibited higher forebrain serotonergic activity and a significant reduction in their relative cortisol levels, with no effects on sexual steroid plasma levels or growth parameters. Thus, this study points to food trp enrichment as a "neurodietary'' method for elevating brain serotonergic activity and decreasing stress, without affecting growth or sex steroid hormone levels. © 2015 Elsevier Inc. Fil:Ramallo, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Somoza, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pandolfi, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166480_v223_n_p27_Morandini http://hdl.handle.net/20.500.12110/paper_00166480_v223_n_p27_Morandini |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cichlids L-Tryptophan Serotonin Steroid hormones Stress hydrocortisone sex hormone tryptophan hydrocortisone serotonin sex hormone tryptophan adult animal cell animal experiment animal tissue Article brain nerve cell Cichlasoma dimerus cichlid controlled study diet supplementation female growth hypothalamus male nonhuman pretectum priority journal raphe nucleus serotoninergic system stress aggression animal blood brain diet drug effects enzyme immunoassay metabolism physiology sexual behavior social dominance Aggression Animals Brain Cichlids Diet Female Gonadal Steroid Hormones Hierarchy, Social Hydrocortisone Immunoenzyme Techniques Male Serotonin Sexual Behavior Tryptophan |
| spellingShingle |
Cichlids L-Tryptophan Serotonin Steroid hormones Stress hydrocortisone sex hormone tryptophan hydrocortisone serotonin sex hormone tryptophan adult animal cell animal experiment animal tissue Article brain nerve cell Cichlasoma dimerus cichlid controlled study diet supplementation female growth hypothalamus male nonhuman pretectum priority journal raphe nucleus serotoninergic system stress aggression animal blood brain diet drug effects enzyme immunoassay metabolism physiology sexual behavior social dominance Aggression Animals Brain Cichlids Diet Female Gonadal Steroid Hormones Hierarchy, Social Hydrocortisone Immunoenzyme Techniques Male Serotonin Sexual Behavior Tryptophan Ramallo, Martín R. Somoza, Gustavo Manuel Pandolfi, Matías Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet |
| topic_facet |
Cichlids L-Tryptophan Serotonin Steroid hormones Stress hydrocortisone sex hormone tryptophan hydrocortisone serotonin sex hormone tryptophan adult animal cell animal experiment animal tissue Article brain nerve cell Cichlasoma dimerus cichlid controlled study diet supplementation female growth hypothalamus male nonhuman pretectum priority journal raphe nucleus serotoninergic system stress aggression animal blood brain diet drug effects enzyme immunoassay metabolism physiology sexual behavior social dominance Aggression Animals Brain Cichlids Diet Female Gonadal Steroid Hormones Hierarchy, Social Hydrocortisone Immunoenzyme Techniques Male Serotonin Sexual Behavior Tryptophan |
| description |
Reared animals for edible or ornamental purposes are frequently exposed to high aggression and stressful situations. These factors generally arise from conspecifics in densely breeding conditions. In vertebrates, serotonin (5-HT) has been postulated as a key neuromodulator and neurotransmitter involved in aggression and stress. The essential amino acid l-tryptophan (trp) is crucial for the synthesis of 5-HT, and so, leaves a gateway for indirectly augmenting brain 5-HT levels by means of a trp-enriched diet. The cichlid fish Cichlasoma dimerus, locally known as chanchita, is an autochthonous, potentially ornamental species and a fruitful laboratory model which behavior and reproduction has been studied over the last 15 years. It presents complex social hierarchies, and great asymmetries between subordinate and dominant animals in respect to aggression, stress, and reproductive chance. The first aim of this work was to perform a morphological description of chanchita's brain serotonergic system, in both males and females. Then, we evaluated the effects of a trp-supplemented diet, given during 4 weeks, on brain serotonergic activity, stress and sexual steroid hormones, and growth in isolated specimens. Results showed that chanchita's brain serotonergic system is composed of several populations of neurons located in three main areas: pretectum, hypothalamus and raphe, with no clear differences between males and females at a morphological level. Animals fed with trp-enriched diets exhibited higher forebrain serotonergic activity and a significant reduction in their relative cortisol levels, with no effects on sexual steroid plasma levels or growth parameters. Thus, this study points to food trp enrichment as a "neurodietary'' method for elevating brain serotonergic activity and decreasing stress, without affecting growth or sex steroid hormone levels. © 2015 Elsevier Inc. |
| author |
Ramallo, Martín R. Somoza, Gustavo Manuel Pandolfi, Matías |
| author_facet |
Ramallo, Martín R. Somoza, Gustavo Manuel Pandolfi, Matías |
| author_sort |
Ramallo, Martín R. |
| title |
Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet |
| title_short |
Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet |
| title_full |
Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet |
| title_fullStr |
Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet |
| title_full_unstemmed |
Serotonergic outcome, stress and sexual steroid hormones, and growth in a South American cichlid fish fed with an l-tryptophan enriched diet |
| title_sort |
serotonergic outcome, stress and sexual steroid hormones, and growth in a south american cichlid fish fed with an l-tryptophan enriched diet |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166480_v223_n_p27_Morandini http://hdl.handle.net/20.500.12110/paper_00166480_v223_n_p27_Morandini |
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| _version_ |
1768543829556723712 |