Abstract：
:It has been established that sows up- or down-regulate their milk production as the frequency of nursings is changed. The amount of udder massage by piglets might also influence milk production. To investigate whether these effects are associated with changes in prolactin or insulin levels, we enforced five sows each to nurse either every 35 min (MIN35) or every 70 min (MIN70) over a 26- to 28-hr period. Milk production was measured during the first 24 hr of this period. During the last three to four nursings, blood was collected every 5 min. Plasma prolactin levels increased after milk ejection (P < 0.05), whereas insulin levels increased only briefly in MIN70 sows. Sows nursing every 35 min had lower basal (P < 0.001) and maximal (P < 0.05) concentrations of insulin than MIN70 sows. There were no differences between the two groups in prolactin levels. Nursings with a postejection udder massage longer than 90 s tended to induce a higher increase in prolactin (P < 0.1) than nursings with a shorter massage. When the effects of imposed nursing frequency were removed, there was an across-sows positive residual correlation between average prolactin levels (P < 0.05) and the duration of post-ejection udder massage during the preceding 24 hr. We conclude that when milk production of a sow is changed by altering the nursing frequency within natural limits, the necessary alteration in catabolic state of energy metabolism may be associated with altered insulin levels. The duration of udder massage in a single nursing might have only a slight immediate impact on prolactin levels, but may influence prolactin levels more substantially if increased for a period of 24 hr.
journal_name
Domest Anim Endocrinoljournal_title
Domestic animal endocrinologyauthors
Spinka M,Illmann G,Stetková Z,Krejcí P,Tománek M,Sedlák L,Lidický Jdoi
10.1016/s0739-7240(99)00025-9subject
Has Abstractpub_date
1999-07-01 00:00:00pages
53-64issue
1eissn
0739-7240issn
1879-0054pii
S0739-7240(99)00025-9journal_volume
17pub_type
杂志文章abstract：:Bile acids (BAs) are synthesized in the liver via the oxidation of cholesterol and further metabolized by microbiota in the gut, where they simultaneously impact gut function. In the present study, 10 goats were randomly divided into 2 groups; 1 group was injected with dexamethasone (Dex; 0.2 mg/kg), and the other gro...
journal_title：Domestic animal endocrinology
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abstract：:The effect of endotoxin on follicular growth and on secretion of LH, estradiol-17beta, progesterone and cortisol during the proestrous phase in cattle was investigated. Holstein heifers were treated with PGF2alpha at 11-13 d after ovulation to induce luteolysis. At 42 hr after PGF2alpha treatment, heifers were adminis...
journal_title：Domestic animal endocrinology
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doi：10.1016/s0739-7240(01)00098-4
更新日期：2001-05-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(94)00009-p
更新日期：1995-01-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/s0739-7240(98)00015-0
更新日期：1998-09-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2013.09.008
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abstract：:Fecal corticosterone metabolites and plasma corticosterone in Japanese quail selected for low- or high-plasma corticosterone responses to brief mechanical restraint (low- and high-stress lines), and in a line of unselected quail, were measured in this study. No line differences were observed in baseline plasma cortico...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2012.01.002
更新日期：2012-05-01 00:00:00
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journal_title：Domestic animal endocrinology
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doi：10.1016/j.domaniend.2020.106471
更新日期：2020-07-01 00:00:00
abstract：:Relatively little is known about the physiological roles of microRNAs (miRNAs) during follicular development. Previous evidence from in vitro studies suggests specific roles for a subset of miRNAs, including miR-21, miR-23a, miR-145, miR-503, miR-224, miR-383, miR-378, miR-132, and miR-212, in regulating ovarian folli...
journal_title：Domestic animal endocrinology
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doi：10.1016/j.domaniend.2013.06.006
更新日期：2013-10-01 00:00:00
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journal_title：Domestic animal endocrinology
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更新日期：2014-07-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/s0739-7240(01)00107-2
更新日期：2001-08-01 00:00:00
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journal_title：Domestic animal endocrinology
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更新日期：2020-07-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(96)00050-1
更新日期：1996-07-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/s0739-7240(98)00006-x
更新日期：1998-05-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/s0739-7240(97)00019-2
更新日期：1997-07-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.domaniend.2015.08.003
更新日期：2016-01-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(87)90013-0
更新日期：1987-07-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/0739-7240(90)90013-p
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
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更新日期：2014-10-01 00:00:00
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journal_title：Domestic animal endocrinology
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：1990-07-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：1991-04-01 00:00:00
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更新日期：2007-08-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：1988-04-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：2000-01-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：1998-11-01 00:00:00
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journal_title：Domestic animal endocrinology
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更新日期：2015-01-01 00:00:00
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journal_title：Domestic animal endocrinology
pub_type： 杂志文章
doi：10.1016/j.domaniend.2005.12.007
更新日期：2007-01-01 00:00:00
abstract：:The ability of gonadotropin-releasing hormone (GnRH) to synchronize ovulation and new follicular wave emergence before a "superovulatory Day 0" protocol was assessed in Santa Inês ewes. For estrus synchronization, a 60-mg medroxyprogesterone acetate sponge was inserted for 6 d. One day before sponge removal, 37.5-μg d...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：2016-01-01 00:00:00
abstract：:In small ruminants, testosterone and prolactin plasma concentrations show circannual fluctuations as an adaptation mechanism to their seasonal breeding behavior. Sperm resistance to the freezing-thawing process shows seasonal fluctuation throughout the year, with lower sperm freezability at the beginning of the breedi...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：2020-07-01 00:00:00
abstract：:The GH has a multifaceted role in growth, reproduction, and milk production. Nonsynonymous mutations identified as L153V were observed from GH1 (L) to GH2 (V) with higher genotypic frequency for GH1 being 0.87. GH2 (V) allele was identified as a rare allele and the population followed Hardy-Weinberg equilibrium. LL ho...
journal_title：Domestic animal endocrinology
pub_type： 杂志文章
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更新日期：2020-04-01 00:00:00
