Secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms
The objective was to characterize the circannual, circadian, and ultradian secretory patterns of growth hormone (GH) in intact crossbred and purebred dogs. In all experiments, blood samples were collected with minimal stress by direct peripheral venipuncture and GH was measured in plasma by a homolo...
| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2002
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/107658 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC226991&blobtype=pdf |
| Aporte de: |
| id |
I19-R120-10915-107658 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Veterinaria Ciencias Médicas growth hormone dogs secretory patterns |
| spellingShingle |
Veterinaria Ciencias Médicas growth hormone dogs secretory patterns Gobello, María Cristina Corrada, Yanina Alejandra Castex, Gervasio Luis Sota, Rodolfo Luzbel de la Goya, Rodolfo Gustavo Secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms |
| topic_facet |
Veterinaria Ciencias Médicas growth hormone dogs secretory patterns |
| description |
The objective was to characterize the circannual, circadian, and ultradian secretory patterns of growth hormone (GH) in intact crossbred and purebred dogs. In all experiments, blood samples were collected with minimal stress by direct peripheral venipuncture and GH was measured in plasma by a homologous radioimmunoassay. For circannual studies, samples were collected monthly from 6 male dogs between 15:00 and 17:30 h over a 1-year time span. For circadian studies, blood samples were collected at 145-minute intervals from 09:00 to 06:45 h of the following day in 14 female dogs. In ultradian experiments, blood samples were collected at 15-minute intervals for 2.5 h (15:00 to 17:30 h) in 7 males and 7 females. Plasma GH in male dogs remained without change in summer, autumn, and winter but declined (P < 0.01) in spring (LSM ± SEM; 6.9 ± 0.5; 6.0 ± 0.5; 6.3 ± 0.5; 4.3 ± 0.5 ng/mL, respectively). No plasma GH circadian rhythmicity was detected. Nor was any ultradian pattern evident in either males or females. No gender-related differences were observed in ultradian GH plasma profiles. It is concluded that, while basal GH levels show seasonal fluctuations in dogs, neither circadian nor ultradian GH secretory fluctuations were present in the dogs assessed. |
| format |
Articulo Articulo |
| author |
Gobello, María Cristina Corrada, Yanina Alejandra Castex, Gervasio Luis Sota, Rodolfo Luzbel de la Goya, Rodolfo Gustavo |
| author_facet |
Gobello, María Cristina Corrada, Yanina Alejandra Castex, Gervasio Luis Sota, Rodolfo Luzbel de la Goya, Rodolfo Gustavo |
| author_sort |
Gobello, María Cristina |
| title |
Secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms |
| title_short |
Secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms |
| title_full |
Secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms |
| title_fullStr |
Secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms |
| title_full_unstemmed |
Secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms |
| title_sort |
secretory patterns of growth hormone in dogs: circannual, circadian, and ultradian rhythms |
| publishDate |
2002 |
| url |
http://sedici.unlp.edu.ar/handle/10915/107658 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC226991&blobtype=pdf |
| work_keys_str_mv |
AT gobellomariacristina secretorypatternsofgrowthhormoneindogscircannualcircadianandultradianrhythms AT corradayaninaalejandra secretorypatternsofgrowthhormoneindogscircannualcircadianandultradianrhythms AT castexgervasioluis secretorypatternsofgrowthhormoneindogscircannualcircadianandultradianrhythms AT sotarodolfoluzbeldela secretorypatternsofgrowthhormoneindogscircannualcircadianandultradianrhythms AT goyarodolfogustavo secretorypatternsofgrowthhormoneindogscircannualcircadianandultradianrhythms |
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Repositorios |
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1764820443445854209 |