Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus
Using immunocytochemistry we have described the distribution and ontogeny of three distinct gonadotropin-releasing hormone (GnRH) neural systems, emphasizing the analysis during the period of sex differentiation in the South American cichlid fish Cichlasoma dimerus. In the forebrain a group of neuro...
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2002
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03402061_v205_n4_p271_Pandolfi http://hdl.handle.net/20.500.12110/paper_03402061_v205_n4_p271_Pandolfi |
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paper:paper_03402061_v205_n4_p271_Pandolfi2023-06-08T15:33:51Z Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus Development Differentiation Olfactory placode Teleost Terminal nerve gonadorelin gonadorelin animal tissue article Cichlasoma dimerus controlled study female forebrain gonad development immunocytochemistry immunoreactivity male nerve cell differentiation nonhuman olfactory bulb olfactory nerve ontogeny priority journal protein localization sex differentiation tegmentum telencephalon teleost animal brain cell differentiation cichlid cytology genetics growth, development and aging immunohistochemistry larva metabolism nerve cell physiology preoptic area Animal Brain Cell Differentiation Cichlids Gonadorelin Immunohistochemistry Larva Neurons Olfactory Bulb Preoptic Area Sex Differentiation Support, Non-U.S. Gov't Tegmentum Mesencephali Animals Cell Differentiation Gonadotropin-Releasing Hormone Immunohistochemistry Larva Olfactory Bulb Preoptic Area Sex Differentiation Tegmentum Mesencephali Animalia Cichlasoma Cichlidae Gallus gallus Teleostei Using immunocytochemistry we have described the distribution and ontogeny of three distinct gonadotropin-releasing hormone (GnRH) neural systems, emphasizing the analysis during the period of sex differentiation in the South American cichlid fish Cichlasoma dimerus. In the forebrain a group of neurones immunoreactive to salmon GnRH that formed clusters in the nucleus olfacto retinalis (NOR), was located at the junction of the olfactory bulb and the telencephalon. These neurones differentiated 3 days after fertilization from the olfactory placodes. GnRH immunoreactive neurones along the olfactory nerves through the rostrobasal olfactory bulb were observed on day 4 and at the NOR on day 10. A group of neurones immunoreactive to chicken GnRH II was seen in the dorsal midbrain tegmentum. They originate from the ventricular ependyma between days 5 and 6. These neurones remained close to blood vessels throughout development. Between days 22 and 30 a group of neurones immunoreactive to seabream GnRH was detected in the anterior basal preoptic area. GnRH innervation of the pituitary was detected after the differentiation of preoptic neurones and in coincidence with gonadal differentiation. We hypothesize that the GnRH neural systems have three distinct embryonic origins. Furthermore, we show that the NOR and the midbrain GnRH neurones might have functions other than gonadal development, whereas the preoptic GnRH neurones in C. dimerus might be associated with gonadal sex differentiation. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03402061_v205_n4_p271_Pandolfi http://hdl.handle.net/20.500.12110/paper_03402061_v205_n4_p271_Pandolfi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Development Differentiation Olfactory placode Teleost Terminal nerve gonadorelin gonadorelin animal tissue article Cichlasoma dimerus controlled study female forebrain gonad development immunocytochemistry immunoreactivity male nerve cell differentiation nonhuman olfactory bulb olfactory nerve ontogeny priority journal protein localization sex differentiation tegmentum telencephalon teleost animal brain cell differentiation cichlid cytology genetics growth, development and aging immunohistochemistry larva metabolism nerve cell physiology preoptic area Animal Brain Cell Differentiation Cichlids Gonadorelin Immunohistochemistry Larva Neurons Olfactory Bulb Preoptic Area Sex Differentiation Support, Non-U.S. Gov't Tegmentum Mesencephali Animals Cell Differentiation Gonadotropin-Releasing Hormone Immunohistochemistry Larva Olfactory Bulb Preoptic Area Sex Differentiation Tegmentum Mesencephali Animalia Cichlasoma Cichlidae Gallus gallus Teleostei |
| spellingShingle |
Development Differentiation Olfactory placode Teleost Terminal nerve gonadorelin gonadorelin animal tissue article Cichlasoma dimerus controlled study female forebrain gonad development immunocytochemistry immunoreactivity male nerve cell differentiation nonhuman olfactory bulb olfactory nerve ontogeny priority journal protein localization sex differentiation tegmentum telencephalon teleost animal brain cell differentiation cichlid cytology genetics growth, development and aging immunohistochemistry larva metabolism nerve cell physiology preoptic area Animal Brain Cell Differentiation Cichlids Gonadorelin Immunohistochemistry Larva Neurons Olfactory Bulb Preoptic Area Sex Differentiation Support, Non-U.S. Gov't Tegmentum Mesencephali Animals Cell Differentiation Gonadotropin-Releasing Hormone Immunohistochemistry Larva Olfactory Bulb Preoptic Area Sex Differentiation Tegmentum Mesencephali Animalia Cichlasoma Cichlidae Gallus gallus Teleostei Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus |
| topic_facet |
Development Differentiation Olfactory placode Teleost Terminal nerve gonadorelin gonadorelin animal tissue article Cichlasoma dimerus controlled study female forebrain gonad development immunocytochemistry immunoreactivity male nerve cell differentiation nonhuman olfactory bulb olfactory nerve ontogeny priority journal protein localization sex differentiation tegmentum telencephalon teleost animal brain cell differentiation cichlid cytology genetics growth, development and aging immunohistochemistry larva metabolism nerve cell physiology preoptic area Animal Brain Cell Differentiation Cichlids Gonadorelin Immunohistochemistry Larva Neurons Olfactory Bulb Preoptic Area Sex Differentiation Support, Non-U.S. Gov't Tegmentum Mesencephali Animals Cell Differentiation Gonadotropin-Releasing Hormone Immunohistochemistry Larva Olfactory Bulb Preoptic Area Sex Differentiation Tegmentum Mesencephali Animalia Cichlasoma Cichlidae Gallus gallus Teleostei |
| description |
Using immunocytochemistry we have described the distribution and ontogeny of three distinct gonadotropin-releasing hormone (GnRH) neural systems, emphasizing the analysis during the period of sex differentiation in the South American cichlid fish Cichlasoma dimerus. In the forebrain a group of neurones immunoreactive to salmon GnRH that formed clusters in the nucleus olfacto retinalis (NOR), was located at the junction of the olfactory bulb and the telencephalon. These neurones differentiated 3 days after fertilization from the olfactory placodes. GnRH immunoreactive neurones along the olfactory nerves through the rostrobasal olfactory bulb were observed on day 4 and at the NOR on day 10. A group of neurones immunoreactive to chicken GnRH II was seen in the dorsal midbrain tegmentum. They originate from the ventricular ependyma between days 5 and 6. These neurones remained close to blood vessels throughout development. Between days 22 and 30 a group of neurones immunoreactive to seabream GnRH was detected in the anterior basal preoptic area. GnRH innervation of the pituitary was detected after the differentiation of preoptic neurones and in coincidence with gonadal differentiation. We hypothesize that the GnRH neural systems have three distinct embryonic origins. Furthermore, we show that the NOR and the midbrain GnRH neurones might have functions other than gonadal development, whereas the preoptic GnRH neurones in C. dimerus might be associated with gonadal sex differentiation. |
| title |
Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus |
| title_short |
Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus |
| title_full |
Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus |
| title_fullStr |
Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus |
| title_full_unstemmed |
Ontogeny and distribution of gonadotropin-releasing hormone (GnRH) neuronal systems in the brain of the cichlid fish Cichlasoma dimerus |
| title_sort |
ontogeny and distribution of gonadotropin-releasing hormone (gnrh) neuronal systems in the brain of the cichlid fish cichlasoma dimerus |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03402061_v205_n4_p271_Pandolfi http://hdl.handle.net/20.500.12110/paper_03402061_v205_n4_p271_Pandolfi |
| _version_ |
1768543371038556160 |