Abstract:
:Eighteen crossbred boars, three siblings from each of six litters, were distributed randomly among three groups after weaning. The 'Natural long-day' group was housed in a standard room with windows, whereas the 'Artificial long-day' and 'Artificial short-day' groups were housed in light-sealed rooms and under an artificial light regimen (1400 lx). In spring (16-17 hr of light) plasma levels of melatonin and cortisol were measured in samples collected hourly for 24 hr. Two commercial melatonin radioimmunoassays with preassay diethyl ether extraction were compared. Only the assay from Bühlmann Laboratories AG showed low to undetectable melatonin levels during the light-phase and was used for further analysis. Dark-phase melatonin concentrations were higher than light-phase melatonin concentrations (P < 0.001). Dark-phase melatonin concentrations were higher in the 'Natural long-day' group than in the 'Artificial long-day' and the 'Artificial short-day' groups (P < 0.001). Sire had a significant effect on dark-phase melatonin concentrations (P < 0.01), but not on light-phase levels. Cortisol concentrations were higher during the light-phase than during the dark phase, and light-phase cortisol concentrations were higher in the 'Natural long-day' group than in the 'Artificial long-day' and the 'Artificial short-day' groups (P < 0.01). This study showed that peripubertal boars express a typical circadian melatonin rhythm under both artificial light regimens and in standard pig stable environment. Natural photoperiod and indoor lighting seem to interact in shaping the melatonin profile in standard stable environment. The great individual variation in the amplitude of the dark-phase melatonin levels could in this study be explained by the different sires.
journal_name
Domest Anim Endocrinoljournal_title
Domestic animal endocrinologyauthors
Andersson H,Lillpers K,Rydhmer L,Forsberg Mdoi
10.1016/s0739-7240(00)00083-7subject
Has Abstractpub_date
2000-11-01 00:00:00pages
261-74issue
4eissn
0739-7240issn
1879-0054pii
S0739724000000837journal_volume
19pub_type
杂志文章abstract::Crossbred ovariectomized ewes were treated with steroid therapies determined previously to be adequate (progesterone-primed) or inadequate (unprimed) for embryonic development in order to determine actual serum concentrations of replaced steroid hormones achieved by such treatments and to identify secreted endometrial...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/0739-7240(93)90017-6
更新日期:1993-04-01 00:00:00
abstract::Mature Hereford cows (n = 28) were used to determine the effect of percentage body fat on secretion of LH and content of GnRH in the infundibular stalk-median eminence (ISME). Cows were fed to maintain, lose, or gain weight to achieve body condition scores (BCS; 1 = emaciated; 9 = obese) of 3 to 7. Then cows were fed ...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/0739-7240(92)90010-u
更新日期:1992-01-01 00:00:00
abstract::Age-dependent interactions between environmental temperature and porcine growth hormone (pGH) treatment on the function of the somatotrophic axis were evaluated in the neonatal pig. At 3 d of age, 40 Landrace x Yorkshire x Duroc piglets received intraperitoneal implants containing either recombinant pGH (0.5 mg/d; n =...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/s0739-7240(99)00003-x
更新日期:1999-02-01 00:00:00
abstract::The effects of increased postruminal supply of casein, corn starch, and soybean oil on plasma concentrations of the gastrointestinal hormones ghrelin and oxyntomodulin (OXM) were investigated. Four mid-lactation Holstein cows were used in a 4 x 4 Latin square. Treatments were continuous abomasal infusions (23 h/d) for...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2009.12.003
更新日期:2010-05-01 00:00:00
abstract::The objectives of this study were to develop an assay for the direct measure of porcine corticosteroid-binding globulin (pCBG) and to confirm age-related changes in plasma pCBG concentration. Isolation and purification of pCBG from plasma was performed by affinity chromatography and HPLC-DEAE anion exchange techniques...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/s0739-7240(03)00011-0
更新日期:2003-05-01 00:00:00
abstract::Assisted reproductive technologies, including in vitro embryo production (IVP), have been successfully used in animal reproduction to optimize breeding strategies for improved production and health in animal husbandry. Despite the progress in IVP techniques over the years, further improvements in in vitro embryo cultu...
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
abstract::Increased secretion of prostaglandin F(2)α (PGF(2)α) within the uterus because of uterine inflammation can cause luteolysis and result in early embryonic loss. Supplementation with polyunsaturated fatty acids (PUFAs) has been shown to influence PG production in many species, although the effects on the mare remain unk...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2012.09.002
更新日期:2013-01-01 00:00:00
abstract::Our aim was to correlate the individual variation in the milk yield response (MYR) of Holstein dairy cows to bovine somatotropin (bST), with changes in milk plasmin and plasminogen activities as well as with plasma hormone and metabolite levels. Thirty-two housed multiparous Holstein cows (90 +/- 3.8 days post partum)...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2004.12.001
更新日期:2005-04-01 00:00:00
abstract::Dairy cattle are susceptible to heat stress-induced reductions in fertility; however, direct effects of hyperthermia on specific reproductive functions are difficult to determine in vivo. The objective of this experiment was to examine the effect of elevated temperature in vitro on follicular steroidogenesis, to gain ...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2005.02.017
更新日期:2005-10-01 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
doi:10.1016/j.domaniend.2019.106405
更新日期:2020-04-01 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
pub_type: 杂志文章
doi:10.1016/j.domaniend.2013.06.006
更新日期:2013-10-01 00:00:00
abstract::The objective of the present studies was to determine the effect of cytokines on FSH-induced estrogen production by granulosa cells from small (1-5 mm) and large (> or = 8 mm) bovine follicles. FSH-induced estradiol production by granulosa cells from large follicles (expressed as pg estradiol/10(5) cells/24 hr) was no...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/0739-7240(94)90034-5
更新日期:1994-01-01 00:00:00
abstract::Although prostaglandin (PG) F2alpha is known to be a principal luteolytic factor, its action on the bovine corpus luteum (CL) is mediated by other intra-ovarian factors. Tumor necrosis factor-alpha (TNFalpha) and its specific receptors are present in the bovine CL with the highest expressions at luteolysis. TNFalpha i...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.domaniend.2005.02.005
更新日期:2005-08-01 00:00:00
abstract::A genome-wide association study had shown that lysine methyltransferase 2A (KMT2A), which encodes the histone 3 lysine 4 methyltransferase and reportedly can regulate gametogenesis, steroidogenesis, and development as well as other biological processes, is a potential candidate gene influencing litter size in the dair...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2020.106538
更新日期:2021-01-01 00:00:00
abstract::Remarkable diversity of size and health of offspring exists after normal pregnancies. When pregnancies are complicated by an extrinsic variable such as inappropriate maternal nutrition, birth weight and health of the neonate are substantially affected. The placenta is the organ through which respiratory gases, nutrien...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.domaniend.2004.06.006
更新日期:2004-10-01 00:00:00
abstract::A remote infusion and blood collection device (Dracpac) was used on free-ranging red deer stags to deliver i.v. a range of ACTH1-24 doses and collect blood for cortisol determination. In Experiment 1, conducted in September, saline and 1, 4, and 16 IU ACTH/100 kg bodyweight were infused (n = 5-7 per treatment). In Exp...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/s0739-7240(96)00095-1
更新日期:1997-01-01 00:00:00
abstract::Thyroxine (T4) and triiodothyronine (T3) concentrations in pregnant and nonpregnant bitches were measured. The allantoic and amniotic fluid samples were collected separately in the third week of pregnancy, and fetal blood samples were collected in the fourth week of pregnancy. There was no difference between T4 result...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2016.07.004
更新日期:2017-01-01 00:00:00
abstract::Adrenomedullin (AM) has been characterized as an endogenous tissue survival factor and modulator of many inflammatory processes. Because of the increased susceptibility of the mammary gland to infection during the time surrounding parturition in the cow, we investigated how milk and tissue content of AM and its bindin...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2006.02.004
更新日期:2007-02-01 00:00:00
abstract::A simple extraction and assay technique of estrone sulfate in bovine blood was developed with the object of detecting the peripheral level of estrone sulfate in a normal estrous cycle or in early pregnancy. Estrone sulfate in bovine plasma was extracted with a small reversed phase cartridge. The steroid conjugate reta...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/0739-7240(96)00013-6
更新日期:1996-05-01 00:00:00
abstract::Pituitary-dependent hyperadrenocorticism (PDH) in dogs is caused by a pituitary corticotroph adenoma. Although PDH is a common disorder in dogs, little is known about the underlying pathogenesis. In the pituitary glands of humans and mice, the pro-opiomelanocortin (POMC)-expressing cell lineages, the corticotrophs and...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2007.03.002
更新日期:2008-04-01 00:00:00
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
pub_type: 杂志文章
doi:10.1016/j.domaniend.2018.05.005
更新日期:2018-10-01 00:00:00
abstract::It has now been well documented that the normal and tumorous canine mammary glands can be extra-pituitary sites of substantial growth hormone (GH) synthesis. Until now, attempts to reproduce the GH synthesis in-vitro using canine mammary explants or mammary tumor cells have not been successful. Therefore, the response...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/s0739-7240(01)00088-1
更新日期:2001-02-01 00:00:00
abstract::Effects of domperidone, a peripheral dopamine receptor antagonist, on secretion of LH and prolactin were studied during the luteal phase and following administration of PGF2 alpha. Since hyperprolactinemia has been reported to inhibit secretion of LH in ewes, effects of thyrotropin-releasing hormone (TRH) also were ex...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/0739-7240(87)90003-8
更新日期:1987-04-01 00:00:00
abstract::The pituitary gland is a key endocrine organ responsible for growth and development. To get closer to understanding important molecular mechanisms at work in the bovine pituitary and identifying the core genes controlling growth, in the present study we have analyzed the transcriptome profiling of the pituitary glands...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2018.09.003
更新日期:2019-01-01 00:00:00
abstract::Nutrition has long been known to have a profound influence on reproductive performance of female cattle, but the underlying mechanism remains poorly understood. Whilst early investigations focused on the modulation of nutrition on hypothalamic-pituitary axis, more recent studies have tested the hypothesis that metabol...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章,评审
doi:10.1016/s0739-7240(02)00159-5
更新日期:2002-07-01 00:00:00
abstract::The corpus luteum (CL) is an ovarian structure which is critical for the maintenance of reproductive cyclicity and pregnancy support. Diet and/or diet components may affect some luteal functions. FSH is widely used to induce multiple follicle development and superovulation. We hypothesized that FSH would affect luteal...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.domaniend.2017.08.002
更新日期:2018-01-01 00:00:00
abstract::Three experiments were conducted to better understand why milking-induced prolactin (PRL) release decreases as lactation advances. Experiment 1 compared the effects of milking, 2-min manual stimulation of the mammary gland (without milking), or injection of 1 IU of oxytocin (without milking) on hormonal release in ear...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2018.10.003
更新日期:2019-01-01 00:00:00
abstract::We studied effects of protein intake at two protein-free energy intake levels on plasma glucose and insulin concentrations, urinary glucose excretion and on liver and intestinal fat content in milk-fed veal calves. Two experiments were performed at body weights (BW) of 80-160 kg (mean 120 kg; Exp. 1) and 160-240 kg (m...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2007.10.002
更新日期:2008-08-01 00:00:00
abstract::Follicular hormones, growth and granulosa cell gonadotropin sensitive adenylate cyclase activity were determined in healthy and atretic follicles during preovulatory maturation in pigs. Ovaries were recovered at slaughter which was 1, 3, 5 or 7 d after the last administration of a progesterone agonist (altrenogest). P...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/0739-7240(93)90018-7
更新日期:1993-04-01 00:00:00
abstract::This study aimed to evaluate the effect of melatonin on the in vitro culture and maturation of isolated sheep early antral follicles. Isolated early antral follicles were cultured for 12 d in α-minimum essential medium (MEM+) alone (control) or α-MEM+ added with fixed different concentrations (100, 500, or 1,000 pg/mL...
journal_title:Domestic animal endocrinology
pub_type: 杂志文章
doi:10.1016/j.domaniend.2019.106386
更新日期:2020-04-01 00:00:00