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Biochemical modeling study reveals mechanisms governing broad luteinizing hormone release in pituitary cells, suggesting complex dual-effector interactions for GnRH and leukotriene C4.
The dose-response curves for pituitary luteinizing hormone (LH) release in response to gonadotropin-releasing hormone and its agonists are unusually broad. It appears, however, that these ligands bind to a single class of receptors. It is shown that these dose-response data can be explained by either of two models in which ligand-receptor complexes stimulate LH secretion by interacting with either of two different effector systems or by interacting with a single effector system but forming monomeric and dimeric active effector complexes. A combination of these two basic models can account for the very broad, biphasic dose-response curve reported for LH release in response to leukotriene C4.
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Leiser et al. (1986) studied this question.
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