Zobrazeno 1 - 10
of 90
pro vyhledávání: '"F. J. Karsch"'
Publikováno v:
Bioscientifica Proceedings.
This article reviews experiments performed to investigate the importance of thyroid hormones to the expression of the seasonal reproductive cycle of ewes. Thyroidectomy was found to block the transition from the breeding season to anoestrus and to ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::428bcf847b67ad093ba779237b590709
https://doi.org/10.1530/biosciprocs.3.031
https://doi.org/10.1530/biosciprocs.3.031
Publikováno v:
Endocrinology. 136:2412-2420
This study was designed to test the hypothesis that endogenous opioid peptides (EOP) mediate the negative feedback action of estradiol on GnRH pulse size in breeding season ewes. If this hypothesis is correct, one would predict that an EOP antagonist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::916393500c689433ac339a65b76ddda5
https://doi.org/10.1210/endo.136.6.7750462
https://doi.org/10.1210/endo.136.6.7750462
Publikováno v:
Reproduction (Cambridge, England). Supplement. 61
Stress influences the activity of the reproductive system at several sites. One of the most significant effects is at level of the GnRH secretory system to reduce GnRH pulsatility and thus LH pulsatility. This in turn reduces the oestradiol signal th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::903ac7c972e13ede3c52c43ab2fc661d
https://pubmed.ncbi.nlm.nih.gov/14635941
https://pubmed.ncbi.nlm.nih.gov/14635941
Publikováno v:
Reproduction (Cambridge, England). Supplement. 59
Seasonally breeding mammals display an annual cycle of fertility that is associated with both structural neuroplasticity and functional changes in the activity of the GnRH neurones in the brain. Sheep are valuable models for understanding the hormona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::3c7f4a78c9ee4491269fc8e317f74746
https://pubmed.ncbi.nlm.nih.gov/12698979
https://pubmed.ncbi.nlm.nih.gov/12698979
Publikováno v:
Reproduction (Cambridge, England). Supplement. 59
FSH is a key reproductive hormone involved in the control of ovarian folliculogenesis and steroidogenesis. Multiple regulatory mechanisms govern the release of FSH. These regulatory mechanisms appear to work in concert to modulate the level, pattern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::81eb278bddc5b47d1068543f607cdfc4
https://pubmed.ncbi.nlm.nih.gov/12698974
https://pubmed.ncbi.nlm.nih.gov/12698974
Autor:
F J, Karsch, D F, Battaglia
Publikováno v:
Reproduction (Cambridge, England). Supplement. 59
This review summarizes a series of experiments that address mechanisms by which endotoxin, a commonly used model of immune/inflammatory challenge, disrupts the oestrous cycle of the ewe. Initial studies in ovariectomized ewes demonstrated that endoto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::057e0444664880b0e9f2daf78f28abaf
https://pubmed.ncbi.nlm.nih.gov/12698976
https://pubmed.ncbi.nlm.nih.gov/12698976
Publikováno v:
Endocrinology. 142(5)
Immune/inflammatory challenges powerfully suppress reproductive neuroendocrine activity. This inhibition is generally considered to be centrally mediated via mechanisms that regulate GnRH secretion. The present study provides two lines of evidence th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::846745965336b539f9e468b12b1f0d39
https://pubmed.ncbi.nlm.nih.gov/11316757
https://pubmed.ncbi.nlm.nih.gov/11316757
Publikováno v:
Biology of reproduction. 63(3)
An endogenous circannual rhythm drives the seasonal reproductive cycle of a broad spectrum of species. This rhythm is synchronized to the seasons (i.e., entrained) by photoperiod, which acts by regulating the circadian pattern of melatonin secretion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::d7121a5299101f8a8210cc54a814547f
https://pubmed.ncbi.nlm.nih.gov/10952919
https://pubmed.ncbi.nlm.nih.gov/10952919
Publikováno v:
Biology of reproduction. 62(1)
Two experiments were conducted to investigate endocrine mechanisms by which the immune/inflammatory stimulus endotoxin disrupts the follicular phase of the estrous cycle of the ewe. In both studies, endotoxin was infused i.v. (300 ng/kg per hour) for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::baa823b9a01da5bc8274e5bbba57cbcc
https://pubmed.ncbi.nlm.nih.gov/10611066
https://pubmed.ncbi.nlm.nih.gov/10611066
Publikováno v:
Endocrinology. 139(10)
We tested the hypothesis that systemic immune/inflammatory challenge (endotoxin) activates the neuroendocrine stress axis centrally by stimulating the secretion of CRH and arginine vasopressin (AVP) into hypophyseal portal blood. In addition, we exam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::2818e79e672fa730b2643f27892d9101
https://pubmed.ncbi.nlm.nih.gov/9751497
https://pubmed.ncbi.nlm.nih.gov/9751497