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pro vyhledávání: '"Lisa M.H. Helms"'
Autor:
Lisa M.H. Helms, E. Gordon Grau
Publikováno v:
Fish physiology and biochemistry. 7(1-6)
The tilapia prolactin (PRL) cell responds rapidly (10-20 min) to small physiological changes in medium osmotic pressure (OP), releasing increasing quantities of hormone as medium OP is reduced. This release is rapidly (≤ 10 min) inhibited by somato
Publikováno v:
General and Comparative Endocrinology. 86:344-351
Previous investigations have shown that the release of PRL and GH from the tilapia pituitary is directly sensitive to osmotic pressure and a variety of endocrine and neuroendocrine factors. The present studies were aimed at determining whether the sp
Publikováno v:
General and Comparative Endocrinology. 83:111-117
Altered osmotic pressure and somatostatin (SRIF) rapidly alter prolactin (PRL) release from the pituitary gland of the euryhaline teleost, the tilapia. The present studies were undertaken to determine whether altered osmotic pressure and SRIF influen
Publikováno v:
Proceedings of the National Academy of Sciences. 88:2758-2762
During in vitro incubation, prolactin release is inhibited in a dose-related manner by cortisol. This action is mimicked by the synthetic glucocorticoid agonist dexamethasone but not by other steroids tested. Perifusion studies indicate that the inhi
Autor:
E. Gordon Grau, Ian M. Cooke, Carol-Ann Ford, N.Harold Richman, Lisa M.H. Helms, Peter K.T. Pang
Publikováno v:
General and comparative endocrinology. 83(1)
The relationship between tritium 3H-labeled prolactin (PRL) release and the loss of tissue-associated 45Ca2+ was examined in the tilapia rostral pars distalis (RPD) using perifusion incubation under conditions which inhibit or stimulate PRL release.
Autor:
Lisa M.H. Helms, Ian M. Cooke, Peter K.T. Pang, Carol-Ann Ford, E. Gordon Grau, N.Harold Richman, Christine G. Benishin
Publikováno v:
General and comparative endocrinology. 77(2)
The accumulation of 45Ca2+ into tilapia prolactin (PRL) tissue was examined under conditions which alter prolactin release. In initial experiments, PRL tissue was incubated in medium containing 12 microCi/ml 45Ca2+ in hyperosmotic medium (355 mOsmola
Autor:
Janine LeGrand, Kohei Yamauchi, Carol-Ann Ford, Lisa M.H. Helms, S. K. Shimoda, E. Gordon Grau
Publikováno v:
General and Comparative Endocrinology. 61:100-108
Thyroid tissue in the Hawaiian parrotfish, Scarus dubius , is organized into two discrete lobes, one anterior to the first pair of afferent branchial arteries and the other between the first and second pairs. Lobes or pieces of thyroid lobes from S.
Publikováno v:
Endocrinology. 119:2848-2855
The release of PRL from the pituitary of a teleost fish, the tilapia (Oreochromis mossambicus), has been previously shown to be dependent on calcium. However, the source(s) and specific action(s) of calcium in the secretory process have not been iden
Publikováno v:
General and Comparative Endocrinology. 65:48-55
The in vitro effects of several factors, including cortisol, somatostatin (SRIF), and medium osmotic pressure, on growth hormone (GH) release from the tilapia pituitary were examined in relation to fish size. Spontaneous GH release from the proximal
Publikováno v:
General and comparative endocrinology. 65(1)
Prolactin (PRL) cells in the rostral pars distalis of the tilapia Oreochromis mossambicus respond to somatostatin (SRIF) and reduced medium osmotic pressure within 10-20 min of exposure during perifusion incubation. Pieces of rostral pars distalis ti