Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin
1. Serum prolactin levels are low during the first 20 days of life and gradually increase toward puberty, in both male and female rats. 2. There is an age-related increase in the cell population engaged in prolactin secretion, as well as an increase in the synthesis of prolactin and of the amount of...
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1992
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02724340_v12_n1_p1_BecuVillalobos http://hdl.handle.net/20.500.12110/paper_02724340_v12_n1_p1_BecuVillalobos |
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paper:paper_02724340_v12_n1_p1_BecuVillalobos2023-06-08T15:25:02Z Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin neurotransmitters ontogeny prolactin rat sexual differences dopamine estrogen follitropin luteinizing hormone luteinizing hormone receptor opiate pituitrin prolactin releasing factor prolactostatin serotonin testosterone accessory sex organ brain dopaminergic system female hormonal regulation hypothalamus hypophysis system luteinizing hormone release male neuroendocrinology nonhuman ontogeny ovary prolactin release prolactin synthesis puberty rat review sex difference steroidogenesis testis development Age Factors Animal Dopamine Female Hypothalamo-Hypophyseal System Male Ovary Periodicity Pituitary Gland, Anterior Pituitary-Adrenal System Prolactin Rats Serotonin Sex Factors Sex Hormones Sex Maturation Support, Non-U.S. Gov't Testis 1. Serum prolactin levels are low during the first 20 days of life and gradually increase toward puberty, in both male and female rats. 2. There is an age-related increase in the cell population engaged in prolactin secretion, as well as an increase in the synthesis of prolactin and of the amount of prolactin secreted from individual lactotropes. 3. The gradual increase in prolactin levels in the third week of life is not related to a decrease in dopaminergic inhibition but to an increase in the efficiency of prolactin releasing factors such as estrogen, serotonin, opiates, and posterior pituitary extracts. 4. Prolactin release induced by physiological factors, such as stress, cervical stimulation, or the expression of spontaneous diurnal and nocturnal surges, requires maturational events within the hypothalamic-pituitary axis which are evident at the end of the third week of life. 5. In the female rat the steadily increasing levels of prolactin are involved in the timing of puberty eclosion acting at the ovary and at the brain. 6. In the prepubertal male rat increasing titers of prolactin may be involved in testicular and accessory organ development and may facilitate the actions of luteinizing hormone, follicle stimulating hormone, and testosterone on male sexual organs. © 1992 Plenum Publishing Corporation. 1992 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02724340_v12_n1_p1_BecuVillalobos http://hdl.handle.net/20.500.12110/paper_02724340_v12_n1_p1_BecuVillalobos |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
neurotransmitters ontogeny prolactin rat sexual differences dopamine estrogen follitropin luteinizing hormone luteinizing hormone receptor opiate pituitrin prolactin releasing factor prolactostatin serotonin testosterone accessory sex organ brain dopaminergic system female hormonal regulation hypothalamus hypophysis system luteinizing hormone release male neuroendocrinology nonhuman ontogeny ovary prolactin release prolactin synthesis puberty rat review sex difference steroidogenesis testis development Age Factors Animal Dopamine Female Hypothalamo-Hypophyseal System Male Ovary Periodicity Pituitary Gland, Anterior Pituitary-Adrenal System Prolactin Rats Serotonin Sex Factors Sex Hormones Sex Maturation Support, Non-U.S. Gov't Testis |
| spellingShingle |
neurotransmitters ontogeny prolactin rat sexual differences dopamine estrogen follitropin luteinizing hormone luteinizing hormone receptor opiate pituitrin prolactin releasing factor prolactostatin serotonin testosterone accessory sex organ brain dopaminergic system female hormonal regulation hypothalamus hypophysis system luteinizing hormone release male neuroendocrinology nonhuman ontogeny ovary prolactin release prolactin synthesis puberty rat review sex difference steroidogenesis testis development Age Factors Animal Dopamine Female Hypothalamo-Hypophyseal System Male Ovary Periodicity Pituitary Gland, Anterior Pituitary-Adrenal System Prolactin Rats Serotonin Sex Factors Sex Hormones Sex Maturation Support, Non-U.S. Gov't Testis Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin |
| topic_facet |
neurotransmitters ontogeny prolactin rat sexual differences dopamine estrogen follitropin luteinizing hormone luteinizing hormone receptor opiate pituitrin prolactin releasing factor prolactostatin serotonin testosterone accessory sex organ brain dopaminergic system female hormonal regulation hypothalamus hypophysis system luteinizing hormone release male neuroendocrinology nonhuman ontogeny ovary prolactin release prolactin synthesis puberty rat review sex difference steroidogenesis testis development Age Factors Animal Dopamine Female Hypothalamo-Hypophyseal System Male Ovary Periodicity Pituitary Gland, Anterior Pituitary-Adrenal System Prolactin Rats Serotonin Sex Factors Sex Hormones Sex Maturation Support, Non-U.S. Gov't Testis |
| description |
1. Serum prolactin levels are low during the first 20 days of life and gradually increase toward puberty, in both male and female rats. 2. There is an age-related increase in the cell population engaged in prolactin secretion, as well as an increase in the synthesis of prolactin and of the amount of prolactin secreted from individual lactotropes. 3. The gradual increase in prolactin levels in the third week of life is not related to a decrease in dopaminergic inhibition but to an increase in the efficiency of prolactin releasing factors such as estrogen, serotonin, opiates, and posterior pituitary extracts. 4. Prolactin release induced by physiological factors, such as stress, cervical stimulation, or the expression of spontaneous diurnal and nocturnal surges, requires maturational events within the hypothalamic-pituitary axis which are evident at the end of the third week of life. 5. In the female rat the steadily increasing levels of prolactin are involved in the timing of puberty eclosion acting at the ovary and at the brain. 6. In the prepubertal male rat increasing titers of prolactin may be involved in testicular and accessory organ development and may facilitate the actions of luteinizing hormone, follicle stimulating hormone, and testosterone on male sexual organs. © 1992 Plenum Publishing Corporation. |
| title |
Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin |
| title_short |
Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin |
| title_full |
Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin |
| title_fullStr |
Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin |
| title_full_unstemmed |
Ontogenic studies of the neural control of adenohypophyseal hormones in the rat. II. prolactin |
| title_sort |
ontogenic studies of the neural control of adenohypophyseal hormones in the rat. ii. prolactin |
| publishDate |
1992 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02724340_v12_n1_p1_BecuVillalobos http://hdl.handle.net/20.500.12110/paper_02724340_v12_n1_p1_BecuVillalobos |
| _version_ |
1768546396746547200 |