24 Hour changes in catecholamine content of rat thyroid and submaxillary glands
The occurrence of diurnal rhythmicity in tissue norepinephrine (NE), epinephrine (E) and dopamine (DA) levels of rat thyroid and submaxillary glands was assessed in animals killed at eight time intervals during a 24 hour period. In both tissues significant peak values of NE content were found at the...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03009564_v71_n3_p189_Barontini |
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todo:paper_03009564_v71_n3_p189_Barontini2023-10-03T15:18:05Z 24 Hour changes in catecholamine content of rat thyroid and submaxillary glands Barontini, M. Romeo, H.E. Armando, I. Cardinali, D.P. 24 h rhythm dopamine epinephrine norepinephrine submaxillary glands Superior cervical ganglion thyroid adrenalin dopamine noradrenalin animal cell animal experiment circadian rhythm controlled study male nonhuman rat submandibular gland superior cervical ganglion thyroid gland Animal Catecholamines Circadian Rhythm Male Rats Rats, Inbred Strains Submandibular Gland Support, Non-U.S. Gov't Thyroid Gland The occurrence of diurnal rhythmicity in tissue norepinephrine (NE), epinephrine (E) and dopamine (DA) levels of rat thyroid and submaxillary glands was assessed in animals killed at eight time intervals during a 24 hour period. In both tissues significant peak values of NE content were found at the third hour of dark onset (at 23:00 h). Additionally a minimum of NE content of thyroid gland was apparent in rats killed at the fifth hour of photophase (at 11:00 h). As in the case of NE, peak values of E content were found during the scotophase in both tissues examined. In contrast, DA levels exhibited no diurnal rhythmicity in the rat thyroid gland, and an early rise at the beginning of the photophase in the submaxillary glands. These results support an activation of the sympathetic nervous system innervating the thyroid and submaxillary glands at the beginning of the scotophase. Tissue DA levels do not resemble the activity of peripheral sympathetic nerves in the tissues examined. © 1988 Springer Verlag. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03009564_v71_n3_p189_Barontini |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
24 h rhythm dopamine epinephrine norepinephrine submaxillary glands Superior cervical ganglion thyroid adrenalin dopamine noradrenalin animal cell animal experiment circadian rhythm controlled study male nonhuman rat submandibular gland superior cervical ganglion thyroid gland Animal Catecholamines Circadian Rhythm Male Rats Rats, Inbred Strains Submandibular Gland Support, Non-U.S. Gov't Thyroid Gland |
| spellingShingle |
24 h rhythm dopamine epinephrine norepinephrine submaxillary glands Superior cervical ganglion thyroid adrenalin dopamine noradrenalin animal cell animal experiment circadian rhythm controlled study male nonhuman rat submandibular gland superior cervical ganglion thyroid gland Animal Catecholamines Circadian Rhythm Male Rats Rats, Inbred Strains Submandibular Gland Support, Non-U.S. Gov't Thyroid Gland Barontini, M. Romeo, H.E. Armando, I. Cardinali, D.P. 24 Hour changes in catecholamine content of rat thyroid and submaxillary glands |
| topic_facet |
24 h rhythm dopamine epinephrine norepinephrine submaxillary glands Superior cervical ganglion thyroid adrenalin dopamine noradrenalin animal cell animal experiment circadian rhythm controlled study male nonhuman rat submandibular gland superior cervical ganglion thyroid gland Animal Catecholamines Circadian Rhythm Male Rats Rats, Inbred Strains Submandibular Gland Support, Non-U.S. Gov't Thyroid Gland |
| description |
The occurrence of diurnal rhythmicity in tissue norepinephrine (NE), epinephrine (E) and dopamine (DA) levels of rat thyroid and submaxillary glands was assessed in animals killed at eight time intervals during a 24 hour period. In both tissues significant peak values of NE content were found at the third hour of dark onset (at 23:00 h). Additionally a minimum of NE content of thyroid gland was apparent in rats killed at the fifth hour of photophase (at 11:00 h). As in the case of NE, peak values of E content were found during the scotophase in both tissues examined. In contrast, DA levels exhibited no diurnal rhythmicity in the rat thyroid gland, and an early rise at the beginning of the photophase in the submaxillary glands. These results support an activation of the sympathetic nervous system innervating the thyroid and submaxillary glands at the beginning of the scotophase. Tissue DA levels do not resemble the activity of peripheral sympathetic nerves in the tissues examined. © 1988 Springer Verlag. |
| format |
JOUR |
| author |
Barontini, M. Romeo, H.E. Armando, I. Cardinali, D.P. |
| author_facet |
Barontini, M. Romeo, H.E. Armando, I. Cardinali, D.P. |
| author_sort |
Barontini, M. |
| title |
24 Hour changes in catecholamine content of rat thyroid and submaxillary glands |
| title_short |
24 Hour changes in catecholamine content of rat thyroid and submaxillary glands |
| title_full |
24 Hour changes in catecholamine content of rat thyroid and submaxillary glands |
| title_fullStr |
24 Hour changes in catecholamine content of rat thyroid and submaxillary glands |
| title_full_unstemmed |
24 Hour changes in catecholamine content of rat thyroid and submaxillary glands |
| title_sort |
24 hour changes in catecholamine content of rat thyroid and submaxillary glands |
| url |
http://hdl.handle.net/20.500.12110/paper_03009564_v71_n3_p189_Barontini |
| work_keys_str_mv |
AT barontinim 24hourchangesincatecholaminecontentofratthyroidandsubmaxillaryglands AT romeohe 24hourchangesincatecholaminecontentofratthyroidandsubmaxillaryglands AT armandoi 24hourchangesincatecholaminecontentofratthyroidandsubmaxillaryglands AT cardinalidp 24hourchangesincatecholaminecontentofratthyroidandsubmaxillaryglands |
| _version_ |
1807320653151338496 |