Skip to main content

Advertisement

Computational model of midbrain dopaminergic neuron activity in ageing and obesity

Article metrics

  • 1049 Accesses

Obesity is an increasing health problem in the modern world. Feeding behavior is mostly controlled by homeostatic and hedonic systems. It was already demonstrated in the hypothalamus that diet-induced obesity can change the spontaneous activity of cells involved in homeostatic regulation. It is, however, unclear if the hedonic regulation is also affected by diet-induced obersity. The midbrain dopaminergic (DA) neurons are a key component of the hedonic system. Usually, dopaminergic neurons in brain slice preparations show a highly regular pacemaker-like activity pattern. However it was found in [1], that in mice fed on high fat diet (HFD) a significantly increased proportion of DA neurons fired irregularly as compared to the ones in mice that ware fed on normal diet (NCD). A mathematical model of midbrain dopaminergic neuron (DA) has been developed to better understand the mechanisms underlying the different types of firing patterns that these cells exhibit in vitro. The dopaminergic neuron was modeled using a single compartment which includes voltage and Ca2+-dependent currents described by Hodgkin-Huxley kinetics. The model used in this study is based on an existing DA neuron model [2, 3] and some parameters were determined using new voltage-clamp data from HFD and NCD mouse brain slices.

References

  1. 1.

    Collienne U: Metabolic Modulation of Dopaminergic Neurons. Master's Thesis, University of Cologne. 2012

  2. 2.

    Li Y-X, Bertram R, Rinzel J: Modelling N-methyl-D-aspartate-induced bursting in dopamine neurons. Neuroscience. 1996, 71: 397-410. 10.1016/0306-4522(95)00483-1.

  3. 3.

    Amini B, Clark J, Canavier CC: Calcium dynamics unterlying pacemaker-like and burst firing oscillations in midbrain dopaminergic neurons: a computation study. J Neorophysiol. 1999, 82: 2249-2261.

Download references

Author information

Correspondence to Svitlana Popovych.

Rights and permissions

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and Permissions

About this article

Keywords

  • Obesity
  • Dopaminergic Neuron
  • Brain Slice
  • Neuron Model
  • Firing Pattern