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PMID |
Sentence |
1 |
21750265
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The high basal cAMP level most likely reflects an increased cAMP generation in GK/Par compared with W islets since 1) forskolin dose-dependently induced an exaggerated cAMP accumulation; 2) adenylyl cyclase (AC)2, AC3, and G(s)? proteins were overexpressed; 3) IBMX-activated cAMP accumulation was less efficient and PDE-3B and PDE-1C mRNA were decreased.
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2 |
2848560
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Electron microscopy (rectangular crystalline nucleoids characteristic of B-cells), in vitro release of insulin (during abrupt changes in glucose concentration from 40 to 400 mg/dl and return, M +/- SD insulin levels were 122 +/- 5 uu/ml and 315 +/- 17 at low and high glucose), evidence of binding hormone receptors (VIP and GIP, the binding sites being coupled with adenylyl cyclase stimulation) were used to assess the quality of the transplant.
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3 |
1655527
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In order to explore whether the decrease in cAMP resulted from IL-1 beta interaction with GTP-binding proteins coupled to adenylyl cyclase, islets were treated for 24 h with pertussis toxin prior to addition of cytokine.
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4 |
1534150
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The antidiuretic effect of arginine vasopressin (AVP) is mediated by renal-type (V2) receptors linked to adenylyl cyclase.
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5 |
1455234
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The reduction of the G alpha i2 protein in F9 cells by antisense RNA expression was associated with (i) loss of receptor-mediated inhibition of adenylyl cyclase; (ii) decreased cell doubling time; (iii) induction of a primitive, endoderm-like phenotype in the absence of RA; and (iv) production of the differentiation marker tissue-type plasminogen activator.
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6 |
7648795
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Insulin treatment of platelets is associated with increased prostaglandin E1-stimulated adenylyl cyclase activity and decreased platelet aggregation.
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7 |
7648795
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Because non-insulin dependent (Type II) diabetes mellitus is associated with hyperinsulinemia, we sought to determine the effect of insulin treatment in vivo and in vitro upon stimulation of platelet adenylyl cyclase by prostaglandin E1.
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8 |
7535266
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Inhibition of adenylyl cyclase activity is one of at least four mechanisms by which the neuropeptide galanin inhibits insulin secretion from pancreatic beta-cells.
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9 |
7535266
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In a membrane preparation of the insulin-secreting cell line RINm5F, a maximally effective concentration of galanin inhibited forskolin-stimulated adenylyl cyclase activity by 30%.
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10 |
7535266
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Thus, galanin inhibition of adenylyl cyclase activity in these cells is selectively mediated by two inhibitory G-proteins, Gi2 and Gi3.
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11 |
7589426
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At 1 microM, exendin-4 and (9-39)amide weakly reduced GIP-binding (25%) whereas secretin, glucagon, glucagon-like peptide-1, vasoactive intestinal polypeptide, peptide histidine-isoleucine, and pituitary adenylyl cyclase activating peptide were without effect.
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12 |
8927025
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In addition, unlike vanadyl sulfate, insulin was unable to improve the stimulation exerted by glucagon and isoproterenol on adenylyl cyclase activity in STZD rats.
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13 |
8927025
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These results suggest that vanadyl sulfate mimics the effects of insulin to restore the defective levels of G-proteins and adenylyl cyclase activity.
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14 |
9369448
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Although the affinity of the mutant V2R for arginine vasopressin (AVP) was reduced only 6-fold, the response of adenylyl cyclase activity to AVP revealed a 50-fold right shift in EC50 and a decreased maximum response for the mutant V2R.
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15 |
9369448
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A pronounced difference was observed for this mutant V2R between the stimulation of adenylyl cyclase activity promoted by AVP and the V2 vasopressin receptor agonist deamino[Cys1,D-Arg8]-vasopressin, suggesting an involvement of Gly201 in the selectivity of the receptor for different ligands.
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16 |
10432391
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Madin-Darby canine kidney cell (MDCK) II clones stably expressing c-myc-tagged human V2 receptors were characterized for [3H]-arginine vasopressin (AVP)-binding and AVP-sensitive adenylyl cyclase activity.
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17 |
10812978
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The G beta 5 isoform exhibits novel properties in its activation of effector pathways such as MAPK, phospholipase C-beta, and adenylyl cyclase type II when compared to G beta 1.
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18 |
17086934
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In the beta-cell, cAMP is formed by the activity of adenylyl cyclase, especially in response to the incretin hormones glucagon-like peptide (GLP)-1 and glucose-dependent insulinotropic peptide. cAMP may also play a similar role in regulating GLP-1 secretion from intestinal L-cells. cAMP influences many steps involved in glucose-induced insulin secretion and may be important in regulating pancreatic islet beta-cell differentiation, growth and survival. cAMP itself is rapidly degraded in the pancreatic islet beta-cell by cyclic nucleotide phosphodiesterase enzymes.
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19 |
21094898
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Intracellular signaling mechanisms of GIP secretion are still elusive but include activation of adenylyl cyclase, protein kinase A (PKA), and protein kinase C (PKC).
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20 |
20864687
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Arginine vasopressin (AVP) enhances water reabsorption in the renal collecting duct by vasopressin V? receptor (V?R)-mediated activation of adenylyl cyclase (AC), cAMP-promoted phosphorylation of aquaporin-2 (AQP2), and increased abundance of AQP2 on the apical membrane.
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21 |
21554632
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Cells of the pituitary tumour cell line GH(4) C(1) were exposed to epidermal growth factor, estradiol and insulin for 5 days, a treatment which resulted in 1) increased prolactin storage in secretory granules, 2) the loss of spontaneous [Ca(2+) ](1) oscillations, and 3) a selective reduction of the protein G(s) ?, seen in immunoblots, cholera toxin labelling, and vasoactive intestinal peptide stimulation of adenylyl cyclase.
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22 |
11316746
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It mediates increases in glucose-stimulated insulin secretion by activating adenylyl cyclase and elevating free cytosolic calcium levels in the beta-cell.
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23 |
11316746
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Furthermore, forskolin, (which stimulates adenylyl cyclase and insulin secretion), and 8-Bromo-cAMP, (an analog of cAMP which also stimulates insulin secretion), mimicked the effects of GLP-1 on PDX-1.
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24 |
11316746
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Our results suggest that regulation of PDX-1 by GLP-1 occurs through activation of adenylyl cyclase and the resultant increase in intracellular cAMP, in turn, activates PKA, which ultimately leads to increases in PDX-1 protein levels and translocation of the protein to the nuclei of beta-cells.
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25 |
21539874
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The suppressive effect of somatostatin on ANP secretion was attenuated by the pretreatment with an inhibitor for adenylyl cyclase (MDL-12330A, 5?M) or protein kinase A (KT 5720, 0.1?M).
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