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“School of Nano-Sciences”

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Paper   IPM / Nano-Sciences / 15274
School of Nano Science
  Title:   Computational modeling of the effect of temperature variations on human pancreatic β-cell activity
  Author(s): 
1.  Sajjad Farashi
2.  Pezhman Sasanpour
3.  Hashem Rafii-Tabar
  Status:   Published
  Journal: Journal of Thermal Biology
  Vol.:  75
  Year:  2018
  Pages:   69
  Supported by:  IPM
  Abstract:
The effect of temperature variations on the pancreatic β-cell activity and the role of different model compartments in temperature sensing have been investigated using a computational modeling approach. The results of our study show that temperature variations by several degrees can change the dynamical states of the β-cell system. In addition, temperature variations can alter the characteristic features of the membrane voltage, which correlates with insulin secretion. Simulation results show that the ion channels such as the L-type calcium, the hERG potassium, sodium channels and the glycolysis pathway are the possible sites for sensing temperature variation. Results indicate that for a small temperature change, even though the frequency and amplitude of electrical activity are altered, the area under the membrane potential curve remains almost unchanged, which implies the existence of a thermoregulatory mechanism for preserving the amount of insulin secretion. Furthermore, the computational analysis shows that the β-cell electrical activity exhibits a bursting pattern in physiological temperature (37°C) while in vitro studies reported almost the spiking activity at lower temperatures. Since hormone-secreting systems work more efficient in bursting mode, we propose that the pancreatic β-cell works better in the physiological temperature compared with the reference temperature (33°C).

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