Abstract：
:The objective of this study was to characterize plasma insulin-like growth factor-I (IGF-I) profiles during the estrous cycle in goats. Frequent blood samples were drawn during the day of estrus and during the luteal phase on Day 10 after estrus, and plasma growth hormone (GH) and IGF-I profiles were examined. Then, daily blood samples were drawn throughout the estrous cycle or during induction of estrus by prostaglandin F(2alpha) (PGF(2alpha)) to further clarify the IGF-I profiles. GH was secreted in an episodic manner in the estrous and luteal phases in goats. There were no significant differences in the mean concentrations, pulse amplitude and pulse frequency of GH between the estrous and luteal phases. IGF-I concentrations during estrous phase were higher than those in the luteal phase (P<0.05). Plasma IGF-I increased approximately two days before behavioral estrus, and the IGF-I peak was observed in accordance with the appearance of estrus. The elevated IGF-I levels then declined to basal values 4 to 5 days after estrus. When estrus was induced by PGF(2alpha), plasma IGF-I concentrations increased after treatment, and the concentration 2 days after treatment (day of appearance of behavioral estrus) was significantly higher than concentrations before treatment (P<0.05). The elevated IGF-I levels then declined during the 3 days after treatment. These results indicate that plasma IGF-I concentrations increase during estrus in goats.
journal_name
Domest Anim Endocrinoljournal_title
Domestic animal endocrinologyauthors
Hashizume T,Ohtsuki K,Matsumoto Ndoi
10.1016/s0739-7240(99)00082-xsubject
Has Abstractpub_date
2000-02-01 00:00:00pages
253-63issue
2eissn
0739-7240issn
1879-0054pii
S0739-7240(99)00082-Xjournal_volume
18pub_type
杂志文章abstract：:The objective of the present study was to determine if dexamethasone (Dex; a potent synthetic glucocorticoid) treatment at birth would alter postnatal growth in neonatal pigs. Forty crossbred pigs were injected i.m. with either sterile saline (Cont; n = 10 males and 10 females) or Dex (1 mg/kg; n = 10 males and 10 fem...
journal_title：Domestic animal endocrinology
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abstract：:Adrenocorticotropic hormone (ACTH) challenges are frequently performed in repetition when evaluating stress or welfare in animals. To our knowledge, the repeatability of ACTH challenges in cattle, although fundamental to further studies of this type, has not yet been the subject of research. Therefore, the objective o...
journal_title：Domestic animal endocrinology
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journal_title：Domestic animal endocrinology
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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journal_title：Domestic animal endocrinology
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journal_title：Domestic animal endocrinology
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journal_title：Domestic animal endocrinology
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journal_title：Domestic animal endocrinology
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pub_type： 杂志文章,评审
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更新日期：2021-01-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(90)90007-m
更新日期：1990-10-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
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journal_title：Domestic animal endocrinology
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journal_title：Domestic animal endocrinology
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pub_type： 杂志文章,评审
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更新日期：2003-07-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2010.03.002
更新日期：2010-08-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
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更新日期：1998-09-01 00:00:00
abstract：:The embryo of the domestic fowl (Gallus domesticus) tenders one distinctive advantage over general mammalian models for investigating the development of the hypothalamo-pituitary-adrenocortical (HPA) axis. This is the relative simplicity with which the embryonic endocrine environment can be influenced without confound...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.domaniend.2004.01.001
更新日期：2004-05-01 00:00:00
