Zobrazeno 1 - 10
of 119
pro vyhledávání: '"P.G. Harms"'
Publikováno v:
Animal Reproduction Science. 85:41-52
In rodents and pigs, leptin stimulates the release of gonadotropin-releasing hormone (GnRH) from hypothalamus, gonadotropins from adenohypophyseal (AP) explants and cells, and luteinizing hormone (LH) from full-fed animals. In the current studies, we
Autor:
P.G. Harms, Marcel Amstalden, Thomas H. Welsh, D.A. Zieba, R. L. Stanko, John F. Edwards, Gary L. Williams
Publikováno v:
Biology of Reproduction. 69:1539-1544
Recombinant ovine leptin (oleptin) stimulates an acute increase in the secretion of LH in fasted, but not in normal-fed, cows through an augmentation of the magnitude of individual pulses of LH. Herein, we tested the hypothesis that this effect could
Autor:
P. Chen, Thomas H. Welsh, Jo-Ann G. W. Fleming, Margaret M. Joyce, P.G. Harms, Thomas E. Spencer, Troy L. Ott, Fuller W. Bazer, C. N. K. Green, D. Zhu
Publikováno v:
Biology of Reproduction. 57:621-629
Interferon tau (IFN tau) is the conceptus-produced antiluteolytic signal in ruminants. Three experiments examined the effects of s.c. administration of recombinant ovine (ro)IFN tau on interestrous interval (IEI), oxytocin (OT)-induced uterine prosta
Autor:
J.W. Tanner, P.G. Harms, C.N.Kemper Green, D.W. Forrest, D.A. Hawkins, T.H. Welsh, António Rocha
Publikováno v:
Animal Reproduction Science. 45:157-176
Ultrasonography and endocrine assay techniques were used to monitor structural and hormonal alterations made by the ovary in response to the biological actions of pituitary-derived follicle-stimulating hormone (FSH-P). Angus heifers (n = 36) were all
Publikováno v:
Domestic Animal Endocrinology. 12:349-354
Bovine infundibular (stalk median eminence) explants were incubated in vitro to test the hypothesis that calcium (Ca) is involved in the release of luteinizing hormone-releasing hormone (LHRH) from LHRH neuron terminals in cattle. Right and left infu
Autor:
Gary D. Weesner, P.G. Harms, David W. Forrest, J M Wilson, T J Wu, N. H. McArthur, Donald W. Pfaff
Publikováno v:
Biology of Reproduction. 49:431-436
Experiments were conducted to identify neurons in the bovine brain that express the LHRH gene and to determine whether LHRH mRNA levels are influenced by the ovaries. Two groups of postpubertal heifers were utilized: heifers killed during the mid-lut
Publikováno v:
Biology of Reproduction. 46:653-657
A study was conducted to further understand involvement of the endogenous opioid peptides in suckling-induced inhibition of LH release in ovariectomized rats. The first experiment was designed to determine the effect of an opioid antagonist, naloxone
Publikováno v:
Domestic Animal Endocrinology. 9:71-76
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
Publikováno v:
Journal of Equine Veterinary Science. 11:158-162
Summary Eighteen multiparous Quarter Horse mares were utilized in a study to determine whether nutritionally-induced obesity, initiated during gestation, would adversely affect milk yield and milk composition. Mares were assigned to one of two treatm
Publikováno v:
Biology of Reproduction. 44:546-549
The possible involvement of endogenous opioid peptides (EOPs) in LHRH release from hypothalami of ewes during the breeding season was investigated using an in vitro perifusion system. Hypothalami were procured in December from ovariectomized (OVX; 62