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Reproduction in Domestic Animals, Zuchthygiene

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https://www.readbyqxmd.com/read/29450927/histological-and-immunohistochemical-evaluation-of-granulosa-cells-during-different-stages-of-folliculogenesis-in-bovine-ovaries
#1
App Teh, U Z Izzati, K Mori, N Fuke, T Hirai, G Kitahara, R Yamaguchi
Bovine granulosa cells (GC) vary in their morphological aspect during different stages of folliculogenesis. In this study, 10 morphologically normal bovine ovaries were collected to study the structural aspects of different stages of GC using intermediate filament protein antibodies including cytokeratin AE1/AE3 (AE1/AE3), vimentin, nectin-4 and desmin. Hormonal immunolocalization was assessed using the immunomarkers anti-Müllerian hormone (AMH) and inhibin alpha. In addition, tumour markers and proliferation markers using c-erbB-2 oncoprotein and proliferating cell nuclear antigen, respectively, were investigated...
February 15, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29450923/organic-zinc-and-copper-supplementation-on-antioxidant-protective-mechanism-and-their-correlation-with-sperm-functional-characteristics-in-goats
#2
M Narasimhaiah, A Arunachalam, S Sellappan, V K Mayasula, P R Guvvala, S K Ghosh, V Chandra, J Ghosh, H Kumar
Trace minerals feeding had significant effects on sperm production and fertility with better absorption and proper utilization within the body for optimum reproductive function. Several studies have shown that more influenced trace elements in the diets of animals are copper (Cu) and zinc (Zn). Bucks showing deficiency of this mineral might affect the quality of semen production which in turn would affect the fertility. This experiment was thus designed to test the effects of organic Cu and Zn supplementation on antioxidants enzyme activities and sperm functional attributes in fresh semen of bucks...
February 15, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29431233/lactoferrin-increases-sperm-membrane-functionality-of-frozen-equine-semen
#3
H S Martins, G C da Silva, S F Cortes, F O Paes, O A Martins Filho, Mss Araujo, R Stahlberg, M A Lagares
During cryopreservation, sperm was submitted to an increase in reactive oxygen species generation. This work aimed to improve the quality of frozen equine sperm after the addition of antioxidants lactoferrin (Lf) and catalase (Cat) to a freezing extender. Semen from six stallions was frozen with the extenders: F1) control, INRA 82 freezing extender, F2) F1 + 500 μg/ml Lf and F3) F1 + 200 IU/ml Cat. After thawing, sperm motility parameters, membrane functionality and integrity, and acrosome integrity and spontaneous acrosome-reacted sperm were evaluated with a computer-assisted sperm analysis, a hypoosmotic swelling test and epifluorescent microscopy, respectively...
February 12, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29430805/the-localization-and-function-of-p38%C3%AE-mitogen-activated-protein-kinase-in-rat-oocytes
#4
S Hu, Q Yu, Y Wang, D Ke, F Zhou, G Cheng, W Xia, C Zhu
P38α mitogen-activated protein kinase (MAPK), which is a member of the canonical MAPK family, is activated in response to various extracellular stresses and plays a role in multiple cellular processes. In this study, we investigated the expression, subcellular localization and functional roles of p38α MAPK during the meiotic maturation of rat oocytes. We found that p38α MAPK phosphorylation (p-p38α MAPK, indicative of p38α MAPK activation) was low at the germinal vesicle (GV) stage, increased 3 hr after germinal vesicle breakdown (GVBD) and maintained its maximum at metaphase I (MI) or metaphase II (MII)...
February 12, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29427350/characterization-of-anti-m%C3%A3-llerian-hormone-in-a-case-of-bovine-male-pseudohermaphroditism
#5
G Kitahara, H El-Sheikh Ali, App Teh, Y Hidaka, S Haneda, S Mido, R Yamaguchi, T Osawa
The current report aimed to characterize plasma anti-Müllerian hormone (AMH) in bovine male pseudohermaphroditism. The blood AMH concentration in a Japanese Black male pseudohermaphrodite calf was compared with pre- and post-pubertal male and female calves and castrated calves. The concentration in the case was higher than in post-pubertal males, castrated males, and pre- and post-pubertal female calves (p < .05), but similar to that in pre-pubertal male calves. After extraction of the testes, the concentration in the case dropped to a certain extent...
February 9, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29423943/effect-of-body-condition-score-and-reuse-of-progesterone-releasing-intravaginal-devices-on-conception-rate-following-timed-artificial-insemination-in-nelore-cows
#6
L L Pereira, A P Ferreira, W G Vale, L R Serique, Kal Neves, A C Morini, B M Monteiro, Ahh Minervino
This study had the aim of investigating the efficiency of timed artificial insemination (TAI) through the progesterone-releasing intravaginal device (PRID), used in new condition and for the second and third times in Nelore cows. The effects of device reuse and body condition score (BCS) on the conception rate (CR) were evaluated in 1,122 multiparous Nelore cows (mean BCS of 2.7 ± 0.4), which were randomly distributed into three groups that received new (n = 330), once (n = 439) and twice used (n = 353) PRID...
February 9, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29417645/profiling-of-mirnas-in-neonatal-cloned-bovines-with-collapsed-lungs-and-respiratory-distress
#7
F Y Zhang, N Yang, Y F Rao, W H Du, H S Hao, X M Zhao, H B Zhu, Y Liu
Neonatal respiratory distress is a major mortality factor in cloned animals; however, the pathogenesis of this disease has rarely been investigated. Previous studies have shown that miRNAs regulate critical genes related to lung development, cell differentiation, surfactant synthesis, secretion and lung disease. This study aimed to examine differentially expressed miRNAs in collapsed lungs of cloned bovine neonates and normal lungs in order to identify key pathways and functions that might be related to the pathogenesis of neonatal respiratory distress...
February 8, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29417653/functional-proteomic-analysis-of-crossbred-holstein-friesian%C3%A2-%C3%A3-%C3%A2-sahiwal-bull-spermatozoa
#8
R Singh, G S Sengar, U Singh, R Deb, V Junghare, S Hazra, S Kumar, S Tyagi, A K Das, T V Raja, A Kumar
Male infertility is one of the prime concerns of dairy cattle production. The study was designed to find out differentially expressed proteins in categorized crossbred (Holstein Friesian × Sahiwal) bull semen to serve as potential biomarkers for male infertility. Frozen crossbred bull semen with satisfactory phenotypic records were defined as "good" and "poor" based on their fertility rates. A total of 1,547 proteins were detected in bull spermatozoa using liquid chromatography-mass spectrometer (LC-MS/MS) analysis...
February 7, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29405472/supplemented-stallion-seminal-plasma-can-improve-impaired-motility-due-to-the-dilution-effect-in-chilled-asian-elephant-sperm
#9
A Pinyopummin, S Mahasawangkul, G Nunklang, K Kornkaewrat, S Laopiem, S Koonjaenak, P Wattananit
The dilution effect and effect of restoring seminal plasma (SP) proportion in diluted semen were determined in chilled Asian elephant sperm. Semen was collected from eight males, and samples with ≥30% motile sperm were used in the study. Tris-glucose-egg yolk extender (TE) was used for cooled storage at 4°C for 48 hr. In experiment 1 (n = 18), semen was diluted to 1:1, 1:3, 1:7 and 1:15 with TE (volume per volume). There were no significant changes in sperm viability and sperm with normal acrosome integrity among dilutions, but sperm motility and motility velocities were greater (p < ...
February 6, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29399898/short-term-tolerance-of-equine-spermatozoa-to-various-abiotic-factors
#10
C C Pérez-Marín, F D Requena, A Arando, L Requena, F Requena, E I Agüera
The aim of this study was to determine the effects of various abiotic factors, such as light, physical stress (pipetting) and thermal shock, on the quality of fresh and cooled equine sperm. In experiment I, four sperm aliquots were subjected to different light exposures: (i) protected control samples (CTRL), (ii) exposed to UV light at 10 cm (UV10), (iii) exposed to UV light at 20 cm (UV20) and (iv) exposed to laboratory lighting (LAB). In experiment II, four semen aliquots were subjected to repeated pipetting for 0, 10, 20 and 30 times (CTRL, P10, P20 and P30, respectively)...
February 5, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29399892/specific-fetometric-formulas-of-icc-and-bp-for-calculating-the-parturition-date-in-the-miniature-breeds-of-canine
#11
P Socha, T Janowski
The aim of this study was to derive the growth curves of the inner chorionic cavity and the biparietal distance in miniature dog breeds by ultrasonographic fetometry and present new specific formulas for prediction of parturition date. In this study, foetal biometry parameters were obtained using serial ultrasonographic examinations in 24 pregnant bitches of six different miniature breeds (≤5 kg). The mating time was unknown. Overall, 25 inner chorionic cavity diameter (ICC) and 22 biparietal diameter (BP) measurements were taken...
February 5, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29383772/effects-of-two-freezing-methods-and-two-cryopreservation-media-on-post-thaw-quality-of-stallion-spermatozoa
#12
S Macedo, M Bliebernicht, J Carvalheira, A Costa, F Ribeiro, A Rocha
Glycerol-based extenders are widely utilized for freezing equine semen, but media combining methylformamide may better preserve sperm motility and mitochondrial function. Semen is cryopreserved utilizing either a Styrofoam box filled with liquid nitrogen or an automatic freezer. The objective of this experiment was to compare the post-thaw characteristics of the same ejaculates cryopreserved in a Styrofoam box or in an automatic freezer, utilizing a glycerol-based extender (Gent) and an extender that combines methylformamide and glycerol (BotuCrio® )...
January 30, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29383768/effects-of-the-supplementation-with-an-high-polyphenols-extra-virgin-olive-oil-on-kinetic-sperm-features-and-seminal-plasma-oxidative-status-in-healthy-dogs
#13
V Tufarelli, A Rizzo, G M Lacalandra, A C Guaricci, V Laudadio, L Valentini
The aim of this work was to evaluate the effects of the supplementation of two extra-virgin olive oils (EVOO) having different polyphenols content, on canine spermatozoa kinetic parameters and seminal plasma oxidative status. The study was conducted on 12 clinically healthy dogs of different breeds (2-7 years, 5-48 kg of body weight) divided into two groups: an experimental group supplemented with EVOO (Coratina cultivar) high in polyphenols (H-P) and a control group fed EVOO (Cima di Bitonto cultivar) low in polyphenols (L-P)...
January 30, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29359363/comparison-of-efficiency-of-in-vitro-cloned-sheep-embryo-production-by-conventional-somatic-cell-nuclear-transfer-and-handmade-cloning-technique
#14
S Khan, M Tali, A Khan, S Bhat, A Ashraf, M H Bhat, F Khan, R A Shah
Conventional somatic cell nuclear transfer (SCNT) technique of in vitro production of cloned embryos involves use of costly and complicated micromanipulators. Handmade cloning (HMC) technique has been applied as efficient and cost-effective alternative in many livestock species. The aim of the present study was to compare the efficiency of in vitro production and in vitro development of cloned sheep embryos by the two techniques. Cloned embryos were produced by conventional SCNT using micromanipulator apparatus and by HMC technique...
January 22, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29356134/morphology-morphometry-and-chromatin-distribution-in-llama-sperm-nuclei
#15
S Giuliano, H Cisale, M R Ferrari
The objectives of this study were as follows: (i) to describe and evaluate the frequencies of different morphologies of llama sperm nuclei, (ii) to determine morphometric values of nuclear parameters, (iii) to describe and estimate the frequencies of different classes of chromatin distribution and (iv) to measure haploid DNA content and analyse its nuclear distribution. The study was performed using ejaculates collected from seven males, and sperm nuclei were stained with the Feulgen reaction. Normal morphology ranged from 78...
January 21, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29356122/monitoring-changes-in-back-fat-thickness-and-its-effect-on-the-restoration-of-ovarian-activity-and-fertility-in-bos-indicus-cows
#16
B R Díaz, C S Galina, I Rubio, M Corro, J L Pablos, A Orihuela
With the objective of testing the hypothesis if animals with a stable layer of body fat (FAT) during the peripartum have a better chance of becoming pregnant after calving, fifty-nine multiparous Brahman cows in their last trimester of pregnancy were used. Animals averaged four parturitions and were stocked at a rate of 1.25 animal units per hectare and divided into two groups depending on the time postpartum (dpp) that the intravaginal releasing device CIDR was inserted; Group 1 (<30 dpp; n = 30) received the implant at 25...
January 21, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29352501/predictors-of-beef-calf-temperament-at-weaning-and-its-impact-on-temperament-at-breeding-and-reproductive-performance
#17
V R Kasimanickam, R L Abdel Aziz, H M Williams, R K Kasimanickam
Two experiments were conducted to determine (i) factors influencing calf temperament at weaning, (ii) association between heifer-calf temperament at weaning and temperament at breeding and (iii) effect of heifer-calf temperament on pregnancy rate per artificial insemination (P/AI). In experiment 1, beef cows and their calves (n = 285) from three farms were used. Sire docility estimated progeny difference (EPD) score, birth type (normal or assisted), calf gender, calf behaviour (during 1st 4 weeks) and calf health status (until weaning) were recorded...
January 19, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29352487/disaccharide-combinations-and-the-expression-of-enolase3-and-plasma-membrane-ca2-atpase-isoform-in-sturgeon-sperm-cryopreservation
#18
M D Xi, P Li, H Du, X M Qiao, Z G Liu, Q W Wei
Acipenser sinensis and Acipenser dabryanus are critically endangered species, so germplasm conservation via cryopreservation of sperm is necessary. Disaccharides can act as membrane-impermeable cryoprotectants, and enolase3 (ENO3) and plasma membrane Ca2+ ATPase isoform (PMCA2) are proteins associated with sperm quality. We considered seven characteristics of sperm quality in cultured brood stock from A. sinensis and A. dabryanus. We tested use of sucrose or trehalose alone and in combination at different concentrations for cryopreservation of A...
January 19, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29333626/effect-of-astaxanthin-on-the-quality-of-boar-sperm-stored-at-17%C3%A2-c-incubated-at-37%C3%A2-c-or-under-in-vitro-conditions
#19
A Basioura, C M Boscos, I Parrilla, G Tsousis, I A Tsakmakidis
The aim of the study was to investigate the effect of the antioxidant astaxanthin on boar semen. Twenty ejaculates from 10 boars (two ejaculates/boar) were extended and split in three groups: semen control (SC), solvent control (C; semen with dimethyl sulfoxide, the diluent of astaxanthin) and semen with astaxanthin (A) in concentration 0.5 μmol/L. Sperm quality parameters (motility and kinetics, morphology, viability, functional integrity of sperm plasma membrane by Hypo-Osmotic Swelling Test [HOST] and DNA integrity) were assessed at 0, 24 and 48 hr of storage at 17°C (experiment I), before (0 hr) and after (1 hr) of sperm thermal resistance assay at 37°C (experiment II) and finally before (0 hr) and after (1 hr) sperm in vitro incubation (38...
January 14, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29330967/the-impact-of-bisphenol-s-on-bovine-granulosa-and-theca-cells
#20
K A Campen, M Lavallee, Cmh Combelles
Bisphenol S (BPS) is an endocrine-disrupting chemical with multiple potential mechanisms of action, including as an oestrogen receptor agonist. BPS is increasingly used in plastics and thermal receipts as a substitute for bisphenol A, which has been phased out due to concerns about human health implications. The ability of BPS to alter female reproductive function in mammals has not been widely studied, despite the importance of normal hormone signalling for female reproduction. The aim of this study was to investigate how BPS (in a wide range of doses, including very low doses) affects granulosa cell and theca cell steroid hormone production and cell viability in the bovine...
January 12, 2018: Reproduction in Domestic Animals, Zuchthygiene
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