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A confidence ellipse analysis for stochastic dynamics model of Alzheimer's disease
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Journal Article
A confidence ellipse analysis for stochastic dynamics model of Alzheimer's disease
2023
Overview
The Alzheimer’s disease (AD) is a neurodegenerative disease, which is caused by the aggregation of beta-amyloid peptide (
A
β
) in the patient’s brain and the disorder of
Ca
2
+
homeostasis in neurons. Caluwé and Dupont (Theor Biol 331:12–18, 2013) proposed a deterministic AD model to explore the effect of
Ca
2
+
on AD. They demonstrated the positive feedback loop between
A
β
and
Ca
2
+
:
and the occurrence of bistability. Based on their results, we further discuss the bistable behaviors. We present two periodically feasible drug strategies to alleviate the AD and screen out more effective one. In this paper, we also formulate a stochastic AD model, analyze the existence and uniqueness of global positive solutions and establish sufficient conditions for the existence of ergodic stationary distribution. Furthermore, the confidence ellipses describing the configurational arrangement of stochastic coexistence equilibria are constructed by stochastic sensitivity function technique, and tipping threshold is estimated as well. Noise-induced stochastic switching between two coexistence equilibria is observed in bistability region. Our results provide a new idea to control noise to alleviate AD through physical therapy.
Publisher
Springer Netherlands,Springer Nature B.V
