Showing papers in "Theriogenology in 2018"

TL;DR: This review will focus on the mechanisms of heat stress-induced sperm defects and provide more detailed insights into sperm-borne epigenetic regulations.

TL;DR: The use of fertility programs that include the concepts described in this review have resulted in more P/AI than inseminating cows after an induced estrus at first insemination, and extending these concepts to strategies for resynchronization of ovulation and the implementation of an aggressive reproductive management program results in reproductive performance that is unprecedented for high-producing Holstein dairy cows.

TL;DR: Investigation of the effect of heat stress on granulosa cells function and the associated defense mechanism found that reactive oxygen species level was higher in cells under 41 °C at 24 h compared to control, and NRF2 mediated oxidative stress and endoplasmic reticulum stress response by bovine granULosa cells were higher.

TL;DR: Several facets of sublethal freezing damage are explored, touching on cryocapacitation, the generation of reactive oxygen species and alterations to sperm proteins, lipids and sugars, and the cryoprotective potential of whole seminal plasma and individual proteins.

TL;DR: It is demonstrated that certain SP antioxidants are positively involved in boar sperm cryotolerance, minimizing the oxidative stress imposed by cryogenic handling.

TL;DR: It is found that 10-7 M melatonin increased testosterone production in co-cultured Leydig and Sertoli cells isolated from sheep, and this work suggests that melatonin may function through modulating melatonin receptor 1-regulated insulin-like growth factor-1 expression, as well as melatonin receptors 1-induced suppression of estrogen synthesis to increase androgen production in Co-culturing Leydigs and SERToli cells.

TL;DR: Early gestation circulating PAG concentration may have application in diagnosing pregnancy at day 24 of gestation and more work is needed to determine the potential of early gestation PAGs in predicting embryo loss in dairy cattle undergoing embryo transfer.

TL;DR: It is shown that de novo synthesis of sphingolipids is necessary in implantation and plays a key role in decidualization of mouse.

TL;DR: This work confirms the importance of some bacteria identified by culture-based studies in the pathogenesis of metritis such as Fusobacterium necrophorum and Prevotella melaninogenica; however, it challenges the important of others such as Escherichia coli and Trueperella pyogenes at the time of meetritis diagnosis.

TL;DR: The results confirm the hypothesis, indicating that prolonged parturition and impaired placenta expulsion increased the risk of postpartum metritis and delay uterine involution.

TL;DR: Evaluating the in vitro effect of some NETs components on mare endometrial fibrogenesis and determining its relationship with histopathology or estrous cycle proposes that NETs involvement in chronic endometritis in mares may act as putative endometrian fibrogenic mediators.

TL;DR: The results suggest that the combination of resveratrol and melatonin supported a synergistic increase in oocyte nuclear maturation and total cell numbers of PA blastocysts and improved the development of SCNT embryos.

TL;DR: The present study indicated that the early luteal phase uterus secretes exosomes, which might play important roles in the development of SCNT embryos.

TL;DR: Some potential molecules in spermatozoa of bulls, which may act as a panel of biomarkers for fertility, are identified through proteomics approach.

TL;DR: It is concluded that spermatozoa from bulls aged 10 months have a different epigenetic profile, which could compromise their value.

TL;DR: It is reported for the first time that early pregnancy exerts its effects on the thymus through IFNT and P4 in sheep through the expression of ISG15, P4 receptor (PGR) and PIBF mRNA and the expression.

TL;DR: The findings demonstrate that the combination of R and EGCG could positively affect frozen-thawed boar sperm fertility in vitro; the effect is evident also in R groups, thus demonstrating that this antioxidant is predominant, and no synergic effect is present.

TL;DR: It is suggested that Se plays an important role in the proliferation of and steroidogenesis in LGC by activating the PI3K/Akt and AMPK pathways, thereby increasing the expression of its downstream cell-cycle- and steroid-synthesis-related genes, as well as regulating cellular oxidative stress.

TL;DR: The beneficial effect of betaine is revealed on HS-induced complications of spermatogenesis, as well as its potency to improve epididymal spermatozoa in intact mice.

TL;DR: Equine-derived endometrial MSC share biological attributes with adipose MSC of this species, but displayed a different surface marker phenotype and an impaired migration ability.

TL;DR: The ANOVA test showed that the addition of glutathione significant affected the sperms motility, fertility and hatching rate of seurukan fish Osteochilus vittatus eggs (P < 0.05), and the conclusion was drawn that the optimum concentration of glutATHione is 40 mg L-1 of diluent.

TL;DR: The sperm fatty acid composition of Shetland pony stallions undergoes seasonal changes, and PUFA content increases from the non-breeding to the breeding season, which might in part explain seasonal differences in the resistance of equine spermatozoa to cryopreservation and cooled-storage.

TL;DR: Results from the angiogenesis bioassay suggest that kisspeptin may have a role in the physiological development of new ovarian vessels and additional studies are needed to confirm the functional significance of the kissedpeptin/KISS1R system within the swine ovary.

TL;DR: The results suggest that protamine deficiency in bovine spermatozoa may not have a strong biological impact to explain the difference of in vitro fertility between the bulls used in this study.

TL;DR: It is demonstrated that, additional feeding of organic Zn and Cu to growing male goats advanced onset of puberty and improved quantitative and qualitative semen characteristics are demonstrated.

TL;DR: The results showed that supplementation of the rooster sperm extender with 1% soybean lecithin and 20% egg yolk plasma resulted in higher quality of frozen-thawed sperm.

TL;DR: Chemical induced reduction of nucleic acid m6A methylation during pig oocyte meiosis could impair meiotic maturation and subsequent development potency, possibly through down-regulating pluripotency marker Lin28 mRNA abundance and disturbing MPF-regulated chromosome/spindle organization.

TL;DR: It is demonstrated that vitrified/warmed oocytes need an extra time to restore damage due to cryopreservation procedures and to increase their developmental potential.

TL;DR: The study reveals that the Interferon tau stimulated gene expression in neutrophils can act as peripheral biomarkers for detecting the embryonic mortality in dairy cows.

TL;DR: These specific recombinant gonadotropins have demonstrated their capacity to induce spermatogenesis and spermiation in vivo in a teleost fish, the European eel.