Multiple Cholinergic Signaling Pathways in Pituitary Gonadotrophs
نویسندگان
چکیده
منابع مشابه
Ion Channels of Pituitary Gonadotrophs and Their Roles in Signaling and Secretion
Gonadotrophs are basophilic cells of the anterior pituitary gland specialized to secrete gonadotropins in response to elevation in intracellular calcium concentration. These cells fire action potentials (APs) spontaneously, coupled with voltage-gated calcium influx of insufficient amplitude to trigger gonadotropin release. The spontaneous excitability of gonadotrophs reflects the expression of ...
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We have developed a mathematical model that describes several aspects of agonist-induced Ca2+ signaling in single pituitary gonadotrophs. Our model is based on fast activation of the inositol 1,4,5-trisphosphate (InsP3) receptor Ca2+ channels at low free cytosolic Ca2+ concentration ([Ca2+]i) and slow inactivation at high [Ca2+]i. Previous work has shown that these gating properties, when combi...
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Polycystic ovarian syndrome (PCOS) is a common reproductive disorder, characterized by irregular menses, hyperandrogenism, and polycystic ovaries. Patients with PCOS also commonly suffer from infertility, obesity, and insulin resistance [1]. The biochemical changes that are commonly associated with PCOS are elevated LH to FSH ratios, elevated bioavailable and total testosterone, and elevated in...
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Paracrine and autocrine regulation is well established in many organs including the gonads, but the notion of communication among pituitary cells is a relatively new concept. The FSH-beta and GnRH-receptor genes are up-regulated by pituitary activin and down-regulated by pituitary follistatin, and circulating inhibin disrupts this local regulation by functioning as an endogenous competitor of t...
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Neuromuscular junction (NMJ) is the functional contact (synapse) between an axon of motor neuron and muscle fiber. It is generally accepted to consider this contact only as a specialized morpho-functional structure, where chemical transmission (via release of the acetylcholine (ACh)) of electrical signal from motor neuron to muscle fiber occurs, ultimately causing the muscle to contract. This s...
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ژورنال
عنوان ژورنال: Endocrinology
سال: 2013
ISSN: 0013-7227,1945-7170
DOI: 10.1210/en.2012-1554