Generation of action potentials in a mathematical model of corticotrophs

Biophysical Journal

Volumn 73, Issue 3, 1997, Pages 1263-1275

  LeBeau, Andrew P ^a,b,c   Robson, A Bruce ^b   McKinnon, Alan E ^b   Donald, Richard A ^a   Sneyd, James ^c,d  

^a UNIVERSITY OF OTAGO   (New Zealand)

^b LINCOLN UNIVERSITY   (New Zealand)

^c UNIVERSITY OF CANTERBURY   (New Zealand)

^d UNIVERSITY OF MICHIGAN   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CALCIUM CHANNEL; CORTICOTROPIN;

ACTION POTENTIAL; ARTICLE; CORTICOTROPIN RELEASE; HYPOPHYSIS CELL; MATHEMATICAL MODEL; SIGNAL TRANSDUCTION;

EID: 0030743237     PISSN: 00063495     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0006-3495(97)78159-1     Document Type: Article

References (44)

1. Abou-Samra, A.-B., K. J. Catt, and G. Aguilera. 1987. Calcium-dependent control of corticotropin release in rat anterior pituitary cell cultures. Endocrinology. 121:965-971.
2. Adams, P. R., D. A. Brown, and A. Constanti. 1982. M-currents and other potassium currents in bullfrog sympathetic neurones. J. Physiol. (Lond.). 33:537-572.
3. Aguilera, G., J. P. Harwood, J. X. Wilson, J. Morell, J. H. Brown, and K. J. Catt. 1983. Mechanisms of action of corticotropin release in rat pituitary cells. J. Biol. Chem. 258:8039-8045.
4. Alberts, B., D. Bray, J. Lewis, M. Raff, K. Roberts, and J. D. Watson. 1994. Molecular Biology of the Cell, 3rd Ed. Garland Publishing, New York.
5. Alexander, S. L., C. H. G. Irvine, and R. A. Donald. 1994. Short-term secretion patterns of corticotropin-releasing hormone, arginine vasopressin and ACTH as shown by intensive sampling of pituitary venous blood from horses. Neuroendocrinology. 60:225-236.
6. Antoni, F. A. 1986. Hypothalamic control of adrenocorticotropin secretion: advances since the discovery of 41-residue corticotropin-releasing factor. Endocr. Rev. 7:351-378.
7. 2+ channel trigger secretion with different efficacies in chromaffin cells. Nature. 367:72-76.
8. Brown, D. 1988. M-currents: an update. Trends Neurosci. 11:294-299.
9. Cohen, C. J., and R. T. McCarthy. 1987. Nimodipine block of calcium channels in rat anterior pituitary cells. J. Physiol. (Lond.). 387:195-225.
10. Corcuff, J.-B., N. C. Guérineau, P. Mariot, B. T. Lussier, and P. Mollard. 1993. Multiple cytosolic calcium signals and membrane electrical events evoked in single arginine vasopressin-stimulated corticotrophs. J. Biol. Chem. 268:22313-22321.
11. Doedel, E. 1981. A program for the automatic bifurcation analysis of autonomous systems. Congr. Numer. 30:265-484.
12. Guérineau, N., J.-B. Corcuff, A. Tabarin, and P. Mollard. 1991. Spontaneous and corticotropin-releasing factor-induced cytosolic calcium transients in corticotrophs. Endocrinology. 129:409-420.
13. Halili-Manabat, C., Y. Oki, K. Iino, M. Iwabuchi, H. Morita, and T. Yoshimi. 1995. The role of sodium in mediating adrenocorticotropin secretion by perifused rat anterior pituitary cells. Endocrinology. 136: 2937-2942.
14. Hille, B. 1992. Ionic Channels of Excitable Membranes, 2nd Ed. Sinauer Associates, Sunderland, MA.
15. Hodgkin, A. L., and A. F. Huxley. 1952. A quantitative description of membrane current and its application to conduction and excitation in nerve. J. Physiol (Lond.). 117:500-544.
16. Jones, M. T., and B. Gillham. 1988. Factors involved in the regulation of adrenocorticotropic hormone/β-lipotropic hormone. Physiol. Rev. 68: 743-818.
17. Kaczmarek, L. K. 1988. The regulation of neuronal calcium and potassium channels by protein phosphorylation. In Advances in Second Messengers and Phosphoprotein Research, Vol. 22. P. Greengard and G. A. Robison, editors. Raven Press, New York. 113-138.
18. Kuryshev, Y. A., G. V. Childs, and A. K. Ritchie. 1995a. Three high threshold calcium channel subtypes in rat corticotropes. Endocrinology. 136:3916-3924.
19. 2+ entry in corticotropes is partially dependent on protein kinase A. Endocrinology. 136:3925-3935.
20. 2+ channels in rat corticotropes. Endocrinology. 137:2269-2277.
21. + current in rat corticotropes and its regulation by corticotropin releasing hormone. Biophys. J. 70:A398.
22. Li, Y.-X., J. Rinzel, L. Vergara, and S. S. Stojilković. 1995. Spontaneous electrical and calcium oscillations in unstimulated pituitary gonadotrophs. Biophys. J. 69:785-795.
23. Liu, J.-P. 1994. Studies of the mechanisms of action of corticotropin-releasing factor (CRF) and arginine vasopressin (AVP) in the ovine anterior pituitary: evidence that CRF and AVP stimulate protein phosphorylation and dephosphorylation. Mol. Cell. Endocrinol. 106:57-66.
24. Loechner, K. J., R. M. Kream, and K. Dunlap. 1996. Calcium currents in a pituitary cell line (AtT-20): differential roles in stimulus-secretion coupling. Endocrinology. 137:1429-1437.
25. Luini, A., D. Lewis, S. Guild, D. Corda, and J. Axelrod. 1985. Hormone secretagogues increase cytosolic calcium by increasing cAMP in corticotropin-secreting cells. Proc. Natl. Acad. Sci. USA. 82:8034-8038.
26. Marchetti, C., G. V. Childs, and A. M. Brown. 1987. Membrane currents of identified isolated rat corticotropes and gonadotropes. Am. J. Physiol. 252:E340-E346.
27. McDonald, T. F., S. Pelzer, W. Trautwein, and D. J. Pelzer. 1994. Regulation and modulation of calcium channels in cardiac, skeletal, and smooth muscle cells. Physiol. Rev. 74:365-507.
28. 2+ transients using simultaneous dual-emission microspectrofluorinetry and electrophysiology in individual pituitary cells. Biochem. Biophys. Res. Commun. 164:1045-1052.
29. 2+ currents sensitive to dihydropyridines. J. Biol. Chem. 269:25158-25164.
30. +, corticotropin-releasing factor, and angiotensin II. Endocrinology. 121:395-409.
31. Mundiña-Weilenmann, C., J. Ma, E. Ríos, and M. M. Hosey. 1991. Dihydropyridine-sensitive skeletal muscle Ca channels in polarized planar bilayers. 2. Effects of phosphorylation by cAMP-dependent protein kinase. Biophys. J. 60:902-909.
32. Nargeot, J., J. M. Nerbonne, J. Engels, and H. A. Lester. 1983. Time course of the increase in the myocardial slow inward current after a photochemically generated concentration jump of intracellular cAMP. Proc. Natl. Acad. Sci. USA. 80:2395-2399.
33. Neher, E., and G. J. Augustine. 1992. Calcium gradients and buffers in bovine chromaffin cells. J. Physiol. (Lond.). 450:273-301.
34. Schlegel, W., and P. Mollard. 1995. Electrical activity and stimulus-secretion coupling in neuroendocrine cells. In The Electrophysiology of Excitable Cells. H. Scherübl and J. Hescheler, editors. CRC Press, Boca Raton, FL. 23-38.
35. Sculptoreanu, A., E. Rotman, M. Takahashi, T. Scheuer, and W. A. Catterall. 1993a. Voltage-dependent potentiation of the activity of the cardiac L-type calcium channel α1 subunits due to phosphoryiation by cAMP-dependent protein kinase. Proc. Natl. Acad. Sci. USA. 90: 10135-10139.
36. 2+ channels due to phosphorylation by cAMP-dependent protein kinase. Nature. 364:240-243.
37. Sherman, A., J. Rinzel, and J. Keizer. 1988. Emergence of organized bursting in clusters of pancreatic ß-cells by channel sharing. Biophys. J. 54:411-425.
38. Shipston, M. J., J. S. Kelly, and F. A. Antoni. 1996. Glucocorticoids block protein kinase A inhibition of calcium-activated potassium channels. J. Biol. Chem. 271:9197-9200.
39. Stojilković, S. S., and K. J. Catt. 1992. Calcium oscillations in anterior pituitary cells. Endocr. Rev. 12:256-280.
40. Tse, A., F. W. Tse, and B. Hille. 1994. Calcium homeostasis in identified rat gonadotropes. J. Physiol. (Lond.). 477:512-525.
41. 2+ channels. J. Physiol. (Lond.). 484:583-592.
42. Won, J. G. S., and D. N. Orth. 1990. Roles of intracellular and extracellular calcium in the kinetic profile of adrenocorticotropin secretion by perifused rat anterior pituitary cells. I. Corticotropin-releasing factor stimulation. Endocrinology. 126:849-857.
43. Wong, B. S., H. Lecar, and M. Adler. 1982. Single calcium-dependent potassium channels in clonal anterior pituitary cells. Biophys. J. 39: 313-317.
44. Yuan, W., and D. M. Bers. 1995. Protein kinase inhibitor H-89 reverses forskolin stimulation of cardiac L-type calcium current. Am. J. Physiol. 268:C651-C659.