Katalin J Kovacs

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The exacerbation of musculoskeletal pain by stress in humans is modeled by the musculoskeletal hyperalgesia in rodents following a forced swim. We hypothesized that stress-sensitive corticotropin releasing factor (CRF) receptors and transient receptor vanilloid 1 (TRPV1) receptors are responsible for the swim stress-induced musculoskeletal hyperalgesia. We(More)
Recent results have demonstrated altered corticotropin-releasing factor (CRF)-41 content of the neurointermediate lobe (NIL) of the pituitary gland in response to various manipulations including osmotic stimulation. This study was undertaken to determine whether changes in CRF-41 content of the NIL are accompanied by changes in intensity of CRF-41-like(More)
We report the histological findings in a case of hereditary diabetes insipidus (HDI) using vasopressin (VP) immunohistochemistry. The hypothalamus displayed a marked loss of magnocellular VP neurons, with preservation of the smaller cells. The neurohypophysis was severely atrophic with scanty immunoreactivity. Our results support the hypothesis that HDI(More)
In the nontumorous pituitary, GnRH stimulates the release and synthesis of LH and FSH by gonadotroph cells via the GnRH receptor (GnRH-R). Little is known, however, about expression of GnRH and GnRH-R messenger RNAs (mRNAs) in nontumorous pituitary tissue and in adenomas. To learn more about the distribution and regulatory roles of GnRH and its receptor, we(More)
A single injection of nitric oxide (NO) synthase (NOS) inhibitors prevents the development of persistent hyperalgesia induced by various manipulations, suggesting that NO precipitates long-term changes in nociception. We examined the possibility that inhibition of NOS may also be sufficient to produce long-term decreases in nociceptive assays, such as(More)
Male Wistar rats were allowed to drink tap water ad lib (W), 2% saline (S) or 2% saline containing dexamethasone (S + D, 1 mg/l) for 7 days. On the 8th day rats were subjected to a 3-min ether stress. Plasma ACTH, corticosterone and prolactin concentrations were determined before and after ether exposure. Prestress concentrations of plasma ACTH were low and(More)
Histologic examination revealed large ganglion cells within the posterior pituitary of an 80-year-old woman who died of myocardial infarction. Apparently fully mature, the cells were an incidental finding scattered within hyperplastic foci of pars intermedia (PI)-derived cells (basophil invasion) on histologic examination of the pituitary obtained at(More)
This review summarizes our current knowledge of the ultrastructure of the human neurohypophysis and includes comments on its anatomy, physiology, and embryology. The neurohypophysis represents a unique tissue having neural and endocrine characteristics and possessing ultrastructural features distinct from those of conventional endocrine organs such as the(More)
Kainic acid produces a persistent hyperalgesia when injected intraperitoneally (i.p.) in the rat or mouse. At higher doses than those needed to influence nociception, kainic acid induces seizures and translocation of histologically reactive zinc in the hippocampus. We tested the hypothesis that zinc, localized in a population of small diameter primary(More)