Effect of growth hormone on steroid concentrations and mRNA expression of their receptor, and selected egg-specific protein genes in the chicken oviduct during pause in laying induced by fasting
This study was undertaken to examine the effect of growth hormone (GH) treatment during pause in laying on (1) the concentration of steroids in blood plasma and oviduct tissues, (2) the expression of mRNA of steroid receptors, and (3) the mRNA expression of selected egg-specific proteins in the chicken oviduct. A pause in egg laying was induced by food deprivation for 5 d, followed by feeding every other day, and then feeding daily from day 10 onwards. Birds were divided into three groups: control (n = 18) fed ad libitum, subjected to pause in laying (n = 18), and subjected to pause in laying and injected every day with 20...
Source: Domestic Animal Endocrinology - May 8, 2017 Category: Endocrinology Authors: J.K. Socha, A. Sechman, M. Mika, A. Hrabia Source Type: research
Intergenerational Impact of Maternal Overnutrition and Obesity Throughout Pregnancy in Sheep on Metabolic Syndrome in Grandsons and Granddaughters
We previously reported that maternal overnutrition and obesity (MO) throughout pregnancy and lactation in sheep (MOF0) decreases term fetal pancreatic β-cell numbers and increases perirenal adiposity producing hyperphagia, increased adiposity and insulin resistance in adult female offspring (MOF1) fed ad libitum. Pregnant female MOF1 exhibited increased blood glucose from mid to late gestation vs. control F1 (CTRF1) though both groups ate only to NRC recommendations. MOF1 ewes delivered female offspring (F2) who like their MOF1 mothers exhibited increased abdominal adiposity and absent neonatal leptin surge. (Source: Dome...
Source: Domestic Animal Endocrinology - April 21, 2017 Category: Endocrinology Authors: C.L. Pankey, M.W. Walton, J.F. Odhiambo, A.M. Smith, A.B. Ghnenis, P.W. Nathanielsz, S.P. Ford Source Type: research
A sandwich ELISA for porcine alpha-1 acid glycoprotein (pAGP, ORM-1) and further demonstration of its use to evaluate growth potential in newborn pigs
A simple, reproducible sandwich, ELISA was developed to measure porcine alpha-1 acid glycoprotein (pAGP, ORM-1) in pig plasma. Porcine AGP isolated from serum was purchased and a polyclonal antisera was prepared in rabbits using the whole pAGP molecule as immunogen. The antiserum was affinity purified, and a portion of the purified antibody fraction was labeled with horseradish peroxidase. Porcine AGP protein was used as a standard, whereas commercially available buffers and reagents were utilized throughout the assay. (Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - April 7, 2017 Category: Endocrinology Authors: T.J. Caperna, A.E. Shannon, M. Stoll, S. Kahl, L.A. Blomberg, J.L. Vallet, T.G. Ramsay Source Type: research
A sandwich ELISA for porcine alpha-1acid glycoprotein (pAGP, ORM-1) and further demonstration of its use to evaluate growth potential in newborn pigs
A simple,-reproducible sandwich ELISA was developed to measure porcine alpha-1 acid glycoprotein (pAGP, ORM-1) in pig plasma. Porcine AGP isolated from serum was purchased and a polyclonal antisera was prepared in rabbits using the whole pAGP molecule as immunogen. The antiserum was affinity-purified and a portion of the purified antibody fraction was labeled with horseradish peroxidase. Porcine AGP protein was used as a standard while commercially available buffers and reagents were utilized throughout the assay. (Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - April 7, 2017 Category: Endocrinology Authors: T.J. Caperna, A.E. Shannon, M. Stoll, S. Kahl, L.A. Blomberg, J.L. Vallet, T.G. Ramsay Source Type: research
Evaluation of a commercially available radioimmunoassay and enzyme immunoassay for the analysis of progesterone and estradiol and the comparison of two extraction efficiency methods
The measurement of progesterone (P4) and estradiol (E2) is essential for monitoring reproductive cycles and can aid in diagnosing the cause of poor reproductive performance in dairy cattle. Readily available, reproducible, accurate, non-radioactive assays are needed for the assessment of P4 and E2 in bovine serum. The gold standard for hormone assessment, radioimmunoassay (RIA), was compared with enzyme-linked immunoassay (EIA). Serum collected from various points in the estrous cycle was extracted with radiolabeled P4 (i.e.: 3H-P4; HE) and without 3H-P4 (CE) prior to being utilized in the assay. (Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - April 4, 2017 Category: Endocrinology Authors: C.S. Skenandore, A. Pineda, J.M. Bahr, A.E. Newell-Fugate, F.C. Cardoso Source Type: research
Editorial Board
(Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - April 1, 2017 Category: Endocrinology Source Type: research
Table of Contents
(Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - April 1, 2017 Category: Endocrinology Source Type: research
Sexually active bucks counterbalance the seasonal negative feedback of estradiol on LH in ovariectomized goats
We showed previously that the permanent presence of bucks rendered sexually active by photoperiodic treatments, thereafter called photostimulated bucks, prevents the occurrence of seasonal anovulation; also, the introduction of these sexually active bucks, induces ovulations during seasonal anestrus. Here, we studied the response of ovariectomized goats bearing 12-mm subcutaneous implants filled or not with estradiol to sexually active males to determine 1) whether the permanent presence of such bucks prevents the decrease of LH despite the presence of a negative feedback by estradiol mimicking that of seasonal anestrus (e...
Source: Domestic Animal Endocrinology - March 30, 2017 Category: Endocrinology Authors: A.L. Mu ñoz, D. Chesneau, H. Hernández, M. Bedos, G. Duarte, J. Vielma, L.A. Zarazaga, P. Chemineau, M. Keller, J.A. Delgadillo Source Type: research
Addition of insulin-like growth factor I to the maturation medium of bovine oocytes subjected to heat shock: effects on the production of reactive oxygen species, mitochondrial activity and oocyte competence
This study was performed to investigate the effects of Insulin-like growth factor-I (IGF-I) addition to in vitro maturation (IVM) medium on apoptosis, mitochondrial activity, ROS production, and developmental competence of bovine oocytes subjected to heat shock. Two temperatures (conventional: 24 h at 38.5 °C, or heat shock: 12 h at 41°C followed by 12 h at 38.5°C) and three IGF-I concentrations (0, 25, and 100 ng/mL) were tested during IVM. The oocytes were then fertilized in vitro, and the presumptive zygotes were cultured until reaching the blastocyst stage. (Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - March 24, 2017 Category: Endocrinology Authors: I.J. Ascari, N.G. Alves, J. Jasmin, R.R. Lima, C.C.R. Quint ão, G. Oberlender, E.A. Moraes, L.S.A. Camargo Source Type: research
Extended low-dose dexamethasone suppression test for diagnosis of atypical Cushing's syndrome in dogs
The purpose of this study was to evaluate extension of the low-dose dexamethasone suppression (LDDS) test from 8 h to 12 h to detect possible hypercortisolemia associated with atypical hyperadrenocorticism (AHAC). Twelve client-owned dogs were enrolled in the study: 6 healthy dogs (group 1) and 6 dogs with suspected AHAC (group 2). Baseline EDTA plasma samples were collected for endogenous ACTH determinatio n using an immunoradiometric assay. Serum samples were collected before and at 4, 8, 10, and 12 h post-administration of 0.01 mg/kg dexamethasone IV for cortisol concentration determination via chemiluminescent ass...
Source: Domestic Animal Endocrinology - March 12, 2017 Category: Endocrinology Authors: K.M. Fowler, L.A. Frank, F. Morandi, J.C. Whittemore Tags: Short Communication Source Type: research
Extended Low Dose Dexamethasone Suppression Test for Diagnosis of Atypical Cushing's Syndrome in Dogs
The purpose of this study was to evaluate extension of the low dose dexamethasone suppression test from 8 h to 12 h to detect possible hypercortisolemia associated with atypical hyperadrenocorticism (AHAC). Twelve client-owned dogs were enrolled in the study: 6 healthy dogs (group 1) and 6 dogs with suspected AHAC (group 2). Baseline EDTA plasma samples were collected for endogenous ACTH determination using an immunoradiometric assay. Serum samples were collected prior to and at 4, 8, 10, and 12 h post-administration of 0.01 mg/kg dexamethasone IV for cortisol concentration determination via chemiluminescent assay. (Source...
Source: Domestic Animal Endocrinology - March 11, 2017 Category: Endocrinology Authors: K.M. Fowler, L.A. Frank, F. Morandi, J.C. Whittemore Source Type: research
Response of Plasma Glucagon-like Peptide-2 to Feeding Pattern and Intraruminal Administration of Volatile Fatty Acids in Sheep
- Through dietary interventions, our data could contribute as a base for modulating the normal postprandial release of GLP-2 in order to improve gut function and nutrient uptake, and consequently, optimize production and health of ruminants. (Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - March 9, 2017 Category: Endocrinology Authors: M. Elsabagh, Y. Inabu, T. Obitsu, T. Sugino Source Type: research
Effect of fish meal supplementation on spatial distribution of lipid microdomains and on the lateral mobility of membrane-bound prostaglandin F2 α receptors in bovine corpora lutea1
This study examined the effects of fish meal supplementation on spatial distribution of lipid microdomains and lateral mobility of prostaglandin F2 α (FP) receptors on cell plasma membranes of the bovine corpus luteum (CL). Beef cows were stratified by BW and randomly assigned to receive a corn gluten meal supplement (n = 4) or fish meal supplement (n = 4) for 60 d to allow incorporation of fish meal derived omega-3 fatty acids into luteal tis sue. Ovaries bearing the CL were surgically removed between days 10 to 12 post-estrus corresponding to approximately day 60 of supplementation. (Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - February 12, 2017 Category: Endocrinology Authors: M.R. Plewes, P.D. Burns, P.E. Graham, J.E. Bruemmer, T.E. Engle, B.G. Barisas Source Type: research
Relationship between Plasma Anti-M üllerian Hormone Concentrations during the Rearing Period and Subsequent Embryo Productivity in Japanese Black Cattle
To utilize plasma anti-M üllerian hormone (AMH) concentrations as early-stage markers for donor cow selection, we investigated the relationship between plasma AMH concentrations in Japanese black heifers and subsequent embryo productivity following superovulation treatment. Plasma AMH and NEFA concentrations in six heifers were evaluated once per month from 3 mo before successful AI for primiparity to 3 mo postpartum. Following calving, embryo collection by superovulation treatment was performed at 3–4-mo intervals. (Source: Domestic Animal Endocrinology)
Source: Domestic Animal Endocrinology - February 2, 2017 Category: Endocrinology Authors: H. Nabenishi, G. Kitahara, S. Takagi, A. Yamazaki, T. Osawa Source Type: research
Metabolic and inflammatory responses to the common sweetener stevioside and a glycemic challenge in horses with equine metabolic syndrome
Extracts derived from the leaves of the stevia plant (stevioside) are commonly used as sweeteners for humans and horses. Stevioside appears to be safe for human consumption, including for individuals with insulin dysregulation. In the horse, the safety or metabolic effects of stevioside on normal animals or on those with metabolic dysfunction are unknown. Furthermore, the inflammatory response to a glycemic challenge or to stevioside in horses is not well defined. Therefore, the objective of this study was to measure the effects of stevioside and a glycemic challenge on insulin, glucose, and inflammatory responses in horse...
Source: Domestic Animal Endocrinology - February 2, 2017 Category: Endocrinology Authors: S.E. Elzinga, B. Rohleder, B. Schanbacher, K. McQuerry, V.D. Barker, A.A. Adams Source Type: research
