Gap junctions and excitation patterns in continuum models of islets

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September 2012, 17(6): 1969-1990. doi: 10.3934/dcdsb.2012.17.1969

Gap junctions and excitation patterns in continuum models of islets

1.	Indian Institute of Science Education and Research, Pune, Maharashtra 411021, India
2.	Department of Mathematics, University of Auckland, Private Bag 92019, Auckland, New Zealand

Received October 2011 Revised March 2012 Published May 2012

Abstract
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We extend the development of homogenized models for excitable tissues coupled through "doughball" gap junctions. The analysis admits nonlinear Fickian fluxes in rather general ways and includes, in particular, calcium-gated conductance. The theory is motivated by an attempt to understand wave propagation and failure observed in the pancreatic islets of Langerhans. We reexamine, numerically, the role that gap junctional strength is generally thought to play in pattern formation in continuum models of islets.

Keywords: Homogenization, partial wave propagation., gap junctions, pancreatic islets, excited activity.

Mathematics Subject Classification: Primary: 74Q10, 35B27; Secondary: 92B2.

Citation: Pranay Goel, James Sneyd. Gap junctions and excitation patterns in continuum models of islets. Discrete & Continuous Dynamical Systems - B, 2012, 17 (6) : 1969-1990. doi: 10.3934/dcdsb.2012.17.1969

References:

[1]	Gerda de Vries and Arthur Sherman, Beyond synchronization: Modulatory and emergent effects of coupling in square-wave bursting,, in, (2005), 243. Google Scholar
[2]	J.-L. Auriault and H. I. Ene, Macroscopic modelling of heat transfer in composites with interfacial thermal barrier,, Int. J. Heat Mass Transfer, 37 (1994), 2885. doi: 10.1016/0017-9310(94)90342-5. Google Scholar
[3]	R. K. Benninger, M. Zhang, W. S. Head, L. S. Satin and D. W. Piston, Gap junction coupling and calcium waves in the pancreatic islet,, Biophys. J., 95 (2008), 5048. doi: 10.1529/biophysj.108.140863. Google Scholar
[4]	R. Bertram, L. Satin, M. Zhang, P. Smolen and A. Sherman, Calcium and glycolysis mediate multiple bursting modes in pancreatic islets,, Biophys. J., 87 (2004), 3074. doi: 10.1529/biophysj.104.049262. Google Scholar
[5]	F. C. Brunicardi, J. Stagner, S. Bonner-Weir, H. Wayland, R. Kleinman, E. Livingston, P. Guth, M. Menger, R. McCuskey, M. Intaglietta, A. Charles, S. Ashley, A. Cheung, E. Ipp, S. Gilman, T. Howard and E. Passaro, Microcirculation of the islets of Langerhans,, Long Beach Veterans Administration Regional Medical Education Center Symposium, 45 (1996), 385. Google Scholar
[6]	O. Cabrera, D. M. Berman, N. S. Kenyon, C. Ricordi, P. O. Berggren and A. Caicedo, The unique cytoarchitecture of human pancreatic islets has implications for islet cell function,, Proc. Natl. Acad. Sci. U.S.A., 103 (2006), 2334. doi: 10.1073/pnas.0510790103. Google Scholar
[7]	B. Ermentrout and K. Bar-Eli, Oscillation death,, Scholarpedia, 3 (2008). Google Scholar
[8]	G. B. Ermentrout and D. H. Terman, "Mathematical Foundations of Neuroscience,", Interdisciplinary Applied Mathematics, 35 (2010). Google Scholar
[9]	P. Goel and A. Sherman, The geometry of bursting in the dual oscillator model of pancreatic beta-cells,, SIAM Journal on Applied Dynamical Systems, 8 (2009), 1664. Google Scholar
[10]	P. Goel, A. Sherman and A. Friedman, Multiscale modeling of electrical and intracellular activity in the pancreas: The islet tridomain equations,, Multiscale Modeling & Simulation, 7 (2009), 1609. Google Scholar
[11]	P. Goel, J. Sneyd and A. Friedman, Homogenization of the cell cytoplasm: The calcium bidomain equations,, Multiscale Modeling & Simulation, 5 (2006), 1045. Google Scholar
[12]	P. E. Hand, B. E. Griffith and C. S. Peskin, Deriving macroscopic myocardial conductivities by homogenization of microscopic models,, Bull. Math. Biol., 71 (2009), 1707. doi: 10.1007/s11538-009-9421-y. Google Scholar
[13]	E. Hertzberg, ed., "Gap Junctions,", Advances in Molecular and Cell Biology, (2000). Google Scholar
[14]	A. Hoffman and J. Mallet-Paret, Universality of crystallographic pinning,, Journal of Dynamics and Differential Equations, 22 (2010), 79. doi: 10.1007/s10884-010-9157-2. Google Scholar
[15]	H. J. Hupkes, D. Pelinovsky and B. Sandstede, Propagation failure in the discrete nagumo equation,, Proceedings of the American Mathematical Society, 139 (2011), 3537. doi: 10.1090/S0002-9939-2011-10757-3. Google Scholar
[16]	T. Kanno, S. O. Gopel, P. Rorsman and M. Wakui, Cellular function in multicellular system for hormone-secretion: Electrophysiological aspect of studies on alpha-, beta- and delta-cells of the pancreatic islet,, Neurosci. Res., 42 (2002), 79. doi: 10.1016/S0168-0102(01)00318-2. Google Scholar
[17]	J. P. Keener, Propagation and its failure in coupled systems of discrete excitable cells,, SIAM Journal on Applied Mathematics, 47 (1987), 556. doi: 10.1137/0147038. Google Scholar
[18]	J. P. Keener, Diffusion induced oscillatory insulin secretion,, Bull. Math. Biol., 63 (2001), 625. doi: 10.1006/bulm.2001.0235. Google Scholar
[19]	W. Krassowska and J. C. Neu, Effective boundary conditions for syncytial tissues,, IEEE Trans Biomed Eng, 41 (1994), 143. doi: 10.1109/10.284925. Google Scholar
[20]	A. Lazrak and C. Peracchia, Gap junction gating sensitivity to physiological internal calcium regardless of pH in Novikoff hepatoma cells,, Biophys. J., 65 (1993), 2002. doi: 10.1016/S0006-3495(93)81242-6. Google Scholar
[21]	L. W. Maki and J. Keizer, Mathematical analysis of a proposed mechanism for oscillatory insulin secretion in perifused HIT-15 cells,, Bull. Math. Biol., 57 (1995), 569. doi: 10.1007/BF02460784. Google Scholar
[22]	J. C. Neu and W. Krassowska, Homogenization of syncytial tissues,, Crit. Rev. Biomed. Eng., 21 (1993), 137. Google Scholar
[23]	G. P. and S. J., A comparison of effective conductivity in two models of gap junction coupling in tissues,,, submitted., (). Google Scholar
[24]	C. Peracchia, Chemical gating of gap junction channels; roles of calcium, pH and calmodulin,, Biochim. Biophys. Acta, 1662 (2004), 61. Google Scholar
[25]	M. Perez-Armendariz, C. Roy, D. C. Spray and M. V. Bennett, Biophysical properties of gap junctions between freshly dispersed pairs of mouse pancreatic beta cells,, Biophys. J., 59 (1991), 76. doi: 10.1016/S0006-3495(91)82200-7. Google Scholar
[26]	A. Pikovsky, M. Rosenblum and J. Kurths, "Synchronization: A Universal Concept in Nonlinear Sciences,", Cambridge Nonlinear Science Series, 12 (2001). Google Scholar
[27]	J. Rinzel and G. B. Ermentrout, Analysis of neural excitability and oscillations,, Methods in Neuronal Modeling, (1989), 135. Google Scholar
[28]	J. V. Rocheleau, G. M. Walker, W. S. Head, O. P. McGuinness and D. W. Piston, Microfluidic glucose stimulation reveals limited coordination of intracellular Ca2+ activity oscillations in pancreatic islets,, Proc. Natl. Acad. Sci. U.S.A., 101 (2004), 12899. doi: 10.1073/pnas.0405149101. Google Scholar
[29]	A. Sherman and J. Rinzel, Model for synchronization of pancreatic beta-cells by gap junction coupling,, Biophys. J., 59 (1991), 547. doi: 10.1016/S0006-3495(91)82271-8. Google Scholar
[30]	C. L. Stokes and J. Rinzel, Diffusion of extracellular K+ can synchronize bursting oscillations in a model islet of Langerhans,, Biophys. J., 65 (1993), 597. doi: 10.1016/S0006-3495(93)81092-0. Google Scholar
[31]	K. Tsaneva-Atanasova, C. L. Zimliki, R. Bertram and A. Sherman, Diffusion of calcium and metabolites in pancreatic islets: Killing oscillations with a pitchfork,, Biophys. J., 90 (2006), 3434. doi: 10.1529/biophysj.105.078360. Google Scholar

show all references

References:

[1]	Gerda de Vries and Arthur Sherman, Beyond synchronization: Modulatory and emergent effects of coupling in square-wave bursting,, in, (2005), 243. Google Scholar
[2]	J.-L. Auriault and H. I. Ene, Macroscopic modelling of heat transfer in composites with interfacial thermal barrier,, Int. J. Heat Mass Transfer, 37 (1994), 2885. doi: 10.1016/0017-9310(94)90342-5. Google Scholar
[3]	R. K. Benninger, M. Zhang, W. S. Head, L. S. Satin and D. W. Piston, Gap junction coupling and calcium waves in the pancreatic islet,, Biophys. J., 95 (2008), 5048. doi: 10.1529/biophysj.108.140863. Google Scholar
[4]	R. Bertram, L. Satin, M. Zhang, P. Smolen and A. Sherman, Calcium and glycolysis mediate multiple bursting modes in pancreatic islets,, Biophys. J., 87 (2004), 3074. doi: 10.1529/biophysj.104.049262. Google Scholar
[5]	F. C. Brunicardi, J. Stagner, S. Bonner-Weir, H. Wayland, R. Kleinman, E. Livingston, P. Guth, M. Menger, R. McCuskey, M. Intaglietta, A. Charles, S. Ashley, A. Cheung, E. Ipp, S. Gilman, T. Howard and E. Passaro, Microcirculation of the islets of Langerhans,, Long Beach Veterans Administration Regional Medical Education Center Symposium, 45 (1996), 385. Google Scholar
[6]	O. Cabrera, D. M. Berman, N. S. Kenyon, C. Ricordi, P. O. Berggren and A. Caicedo, The unique cytoarchitecture of human pancreatic islets has implications for islet cell function,, Proc. Natl. Acad. Sci. U.S.A., 103 (2006), 2334. doi: 10.1073/pnas.0510790103. Google Scholar
[7]	B. Ermentrout and K. Bar-Eli, Oscillation death,, Scholarpedia, 3 (2008). Google Scholar
[8]	G. B. Ermentrout and D. H. Terman, "Mathematical Foundations of Neuroscience,", Interdisciplinary Applied Mathematics, 35 (2010). Google Scholar
[9]	P. Goel and A. Sherman, The geometry of bursting in the dual oscillator model of pancreatic beta-cells,, SIAM Journal on Applied Dynamical Systems, 8 (2009), 1664. Google Scholar
[10]	P. Goel, A. Sherman and A. Friedman, Multiscale modeling of electrical and intracellular activity in the pancreas: The islet tridomain equations,, Multiscale Modeling & Simulation, 7 (2009), 1609. Google Scholar
[11]	P. Goel, J. Sneyd and A. Friedman, Homogenization of the cell cytoplasm: The calcium bidomain equations,, Multiscale Modeling & Simulation, 5 (2006), 1045. Google Scholar
[12]	P. E. Hand, B. E. Griffith and C. S. Peskin, Deriving macroscopic myocardial conductivities by homogenization of microscopic models,, Bull. Math. Biol., 71 (2009), 1707. doi: 10.1007/s11538-009-9421-y. Google Scholar
[13]	E. Hertzberg, ed., "Gap Junctions,", Advances in Molecular and Cell Biology, (2000). Google Scholar
[14]	A. Hoffman and J. Mallet-Paret, Universality of crystallographic pinning,, Journal of Dynamics and Differential Equations, 22 (2010), 79. doi: 10.1007/s10884-010-9157-2. Google Scholar
[15]	H. J. Hupkes, D. Pelinovsky and B. Sandstede, Propagation failure in the discrete nagumo equation,, Proceedings of the American Mathematical Society, 139 (2011), 3537. doi: 10.1090/S0002-9939-2011-10757-3. Google Scholar
[16]	T. Kanno, S. O. Gopel, P. Rorsman and M. Wakui, Cellular function in multicellular system for hormone-secretion: Electrophysiological aspect of studies on alpha-, beta- and delta-cells of the pancreatic islet,, Neurosci. Res., 42 (2002), 79. doi: 10.1016/S0168-0102(01)00318-2. Google Scholar
[17]	J. P. Keener, Propagation and its failure in coupled systems of discrete excitable cells,, SIAM Journal on Applied Mathematics, 47 (1987), 556. doi: 10.1137/0147038. Google Scholar
[18]	J. P. Keener, Diffusion induced oscillatory insulin secretion,, Bull. Math. Biol., 63 (2001), 625. doi: 10.1006/bulm.2001.0235. Google Scholar
[19]	W. Krassowska and J. C. Neu, Effective boundary conditions for syncytial tissues,, IEEE Trans Biomed Eng, 41 (1994), 143. doi: 10.1109/10.284925. Google Scholar
[20]	A. Lazrak and C. Peracchia, Gap junction gating sensitivity to physiological internal calcium regardless of pH in Novikoff hepatoma cells,, Biophys. J., 65 (1993), 2002. doi: 10.1016/S0006-3495(93)81242-6. Google Scholar
[21]	L. W. Maki and J. Keizer, Mathematical analysis of a proposed mechanism for oscillatory insulin secretion in perifused HIT-15 cells,, Bull. Math. Biol., 57 (1995), 569. doi: 10.1007/BF02460784. Google Scholar
[22]	J. C. Neu and W. Krassowska, Homogenization of syncytial tissues,, Crit. Rev. Biomed. Eng., 21 (1993), 137. Google Scholar
[23]	G. P. and S. J., A comparison of effective conductivity in two models of gap junction coupling in tissues,,, submitted., (). Google Scholar
[24]	C. Peracchia, Chemical gating of gap junction channels; roles of calcium, pH and calmodulin,, Biochim. Biophys. Acta, 1662 (2004), 61. Google Scholar
[25]	M. Perez-Armendariz, C. Roy, D. C. Spray and M. V. Bennett, Biophysical properties of gap junctions between freshly dispersed pairs of mouse pancreatic beta cells,, Biophys. J., 59 (1991), 76. doi: 10.1016/S0006-3495(91)82200-7. Google Scholar
[26]	A. Pikovsky, M. Rosenblum and J. Kurths, "Synchronization: A Universal Concept in Nonlinear Sciences,", Cambridge Nonlinear Science Series, 12 (2001). Google Scholar
[27]	J. Rinzel and G. B. Ermentrout, Analysis of neural excitability and oscillations,, Methods in Neuronal Modeling, (1989), 135. Google Scholar
[28]	J. V. Rocheleau, G. M. Walker, W. S. Head, O. P. McGuinness and D. W. Piston, Microfluidic glucose stimulation reveals limited coordination of intracellular Ca2+ activity oscillations in pancreatic islets,, Proc. Natl. Acad. Sci. U.S.A., 101 (2004), 12899. doi: 10.1073/pnas.0405149101. Google Scholar
[29]	A. Sherman and J. Rinzel, Model for synchronization of pancreatic beta-cells by gap junction coupling,, Biophys. J., 59 (1991), 547. doi: 10.1016/S0006-3495(91)82271-8. Google Scholar
[30]	C. L. Stokes and J. Rinzel, Diffusion of extracellular K+ can synchronize bursting oscillations in a model islet of Langerhans,, Biophys. J., 65 (1993), 597. doi: 10.1016/S0006-3495(93)81092-0. Google Scholar
[31]	K. Tsaneva-Atanasova, C. L. Zimliki, R. Bertram and A. Sherman, Diffusion of calcium and metabolites in pancreatic islets: Killing oscillations with a pitchfork,, Biophys. J., 90 (2006), 3434. doi: 10.1529/biophysj.105.078360. Google Scholar

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