Search Results - "GUTHRIE, D. H"

Determination of intracellular reactive oxygen species and high mitochondrial membrane potential in Percoll-treated viable boar sperm using fluorescence-activated flow cytometry by Guthrie, H.D, Welch, G.R

“…The use of frozen semen in the swine industry is limited by problems with viability and fertility compared with liquid semen. Part of the reduction in sperm…”
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Use of fluorescence-activated flow cytometry to determine membrane lipid peroxidation during hypothermic liquid storage and freeze-thawing of viable boar sperm loaded with 4, 4-difluoro-5-(4-phenyl-1,3-butadienyl)-4-bora-3a,4a-diaza-s-indacene-3-undecanoic acid by Guthrie, H.D, Welch, G.R

“…Part of the reduction in boar sperm motility and fertility associated with hypothermic liquid storage and cryopreservation may be due to membrane lipid…”
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Osmotic Tolerance Limits and Effects of Cryoprotectants on Motility of Bovine Spermatozoa by GUTHRIE, H. D, LIU, J, CRITSER, J. K

“…This study was conducted to determine the osmotic properties of bull spermatozoa, including the effects of osmotic stress and cryoprotectant agent (CPA)…”
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Effects of reactive oxygen species on sperm function by Guthrie, H.D, Welch, G.R

“…Reactive oxygen species (ROS) formation and membrane lipid peroxidation have been recognized as problems for sperm survival and fertility. The precise roles…”
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Characterization of the nociceptin receptor (ORL-1) agonist, Ro64-6198, in tests of anxiety across multiple species by VARTY, G. B, HYDE, L. A, XU, X, KORFMACHER, W. A, TULSHIAN, D, PARKER, E. M, HIGGINS, G. A, HODGSON, R. A, LU, S. X, MCCOOL, M. F, KAZDOBA, T. M, DEL VECCHIO, R. A, GUTHRIE, D. H, POND, A. J, GRZELAK, M. E

“…Previous studies have demonstrated behaviors indicative of anxiolysis in rats pretreated with the nociceptin receptor (opioid receptor like-1, ORL-1) agonist,…”
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follicular phase in pigs: Follicle populations, circulating hormones, follicle factors and oocytes by Guthrie, H. D

“…The predominant pattern of follicle development in pigs is characterized by continuous activation, slow growth to the antral stage, and rapid growth to 4 to 5…”
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Comparison of the V1b antagonist, SSR149415, and the CRF1 antagonist, CP-154,526, in rodent models of anxiety and depression by Hodgson, R.A., Higgins, G.A., Guthrie, D.H., Lu, S.X., Pond, A.J., Mullins, D.E., Guzzi, M.F., Parker, E.M., Varty, G.B.

“…Vasopressin and corticotropin releasing factor (CRF) are both critical regulators of an animal's stress response and have been linked to anxiety and…”
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Impact of storage prior to cryopreservation on plasma membrane function and fertility of boar sperm by Guthrie, H.D., Welch, G.R.

“…Occasionally, boar semen must be shipped to another location for cryopreservation. We increased the initial holding time for the cooling of extended semen at…”
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Follicle-stimulating hormone and insulin-like growth factor-I attenuate apoptosis in cultured porcine granulosa cells by Guthrie, H.D, Garrett, W.M, Cooper, B.S

“…Thymocytes and granulosa cells (GC) were cultured up to 48 h to determine the effect of dexamethasone (DEX) on apoptosis in culture (in RPMI containing 10%…”
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Determination of intracellular reactive oxygen species and high mitochondrial membrane potential in Percoll-treated viable boar sperm using fluorescence-activated flow cytometry1 by Guthrie, H. D., Welch, G. R.

“…The use of frozen semen in the swine industry is limited by problems with viability and fertility compared with liquid semen. Part of the reduction in sperm…”
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Plenary Contribution to International Conference on Boar Semen Preservation 2011. Genetic Selection for Freezability and its Controversy with Selection for Performance by Safranski, TJ, Ford, JJ, Rohrer, GA, Guthrie, HD

“…Little data are available in the literature regarding freezability of boar sperm or its relationship with other traits. Existing data suggest the trait would…”
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Effects of hypothermic liquid storage and cryopreservation on basal and induced plasma membrane phospholipid disorder and acrosome exocytosis in boar spermatozoa by Guthrie, H D, Welch, G R

“…Flow cytometry was utilised to determine whether short-term (Day 1) or long-term hypothermic liquid storage (Day 5), or cryopreservation of boar spermatozoa…”
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Flow cytometric sperm sorting: Effects of varying laser power on embryo development in swine by Guthrie, H.D., Johnson, L.A., Garrett, W.M., Welch, G.R., Dobrinsky, J.R.

“…This study was conducted to determine fertilization rate and embryo development using the Beltsville Sperm Sexing Technology with two different laser power…”
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Mitochondrial function and reactive oxygen species action in relation to boar motility by Guthrie, H.D., Welch, G.R., Long, J.A.

“…Flow cytometric assays of viable boar sperm were developed to measure reactive oxygen species (ROS) formation (oxidization of hydroethidine to ethidium),…”
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Follicular atresia in pigs: measurement and physiology by Guthrie, H. D, Grimes, R. W, Cooper, B. S, Hammond, J. M

“…The physiological regulation of follicular atresia was investigated during the early luteal phase after ovulation and during altrenogest-synchronized…”
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Steroidogenic enzyme expression during preovulatory follicle maturation in pigs by GARRETT, W. M, GUTHRIE, H. D

“…During preovulatory maturation, follicles destined to ovulate exhibit a marked increase in steroidogenesis, while nonovulatory, steroidogenically inactive…”
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Effects of frozen and liquid hypothermic storage and extender type on calcium homeostasis in relation to viability and ATP content in striped bass (Morone saxatilis) sperm by Guthrie, H.D., Welch, G.R., Woods, L.C.

“…The effect of hypothermic storage on striped bass sperm calcium homeostasis was determined by Fluo-3 flow cytometry. Calcium homeostasis was defined as the…”
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Atresia in follicles grown after ovulation in the pig: measurement of increased apoptosis in granulosa cells and reduced follicular fluid estradiol-17 beta by GUTHRIE, H. D, COOPER, B. S, WELCH, G. R, ZAKARIA, A. D, JOHNSON, L. A

“…The incidence of atresia in the first group of follicles grown after ovulation was investigated in the pig. At slaughter, 113 follicles 3-6 mm in diameter were…”
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The effect of freezing rate on the quality of striped bass sperm by Frankel, T.E., Theisen, D.D., Guthrie, H.D., Welch, G.R., Woods, L.C.

“…Several studies have been conducted in an attempt to determine the optimal freezing rate for cryopreservation of striped bass (Morone saxatilis) sperm. In this…”
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Expression of androgen receptors and steroidogenic enzymes in relation to follicular growth and atresia following ovulation in pigs by Garrett, W.M. (Germplasm and Gamete Physiology Laboratory, ARS, USDA, Beltsville, MD.), Guthrie, H.D

“…Among the new antral follicles that develop after ovulation in pigs, the incidence of atresia, based on granulosa cell apoptosis, increases between Days 5 and…”
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