Integrated Inflammatory Stress (ITIS) Model

Bidragets oversatte titel: Integreret model af inflammatorisk stress

Elisabeth O Bangsgaard, Poul G Hjorth, Mette S Olufsen, Jesper Mehlsen, Johnny T. Ottesen

12 Citationer (Scopus)

Abstract

During the last decade, there has been an increasing interest in the coupling between the acute inflammatory response and the Hypothalamic-Pituitary-Adrenal (HPA) axis. The inflammatory response is activated acutely by pathogen- or damage-related molecular patterns, whereas the HPA axis maintains a long-term level of the stress hormone cortisol which is also anti-inflammatory. A new integrated model of the interaction between these two subsystems of the inflammatory system is proposed and coined the integrated inflammatory stress (ITIS) model. The coupling mechanisms describing the interactions between the subsystems in the ITIS model are formulated based on biological reasoning and its ability to describe clinical data. The ITIS model is calibrated and validated by simulating various scenarios related to endotoxin (LPS) exposure. The model is capable of reproducing human data of tumor necrosis factor alpha, adrenocorticotropic hormone (ACTH) and cortisol and suggests that repeated LPS injections lead to a deficient response. The ITIS model predicts that the most extensive response to an LPS injection in ACTH and cortisol concentrations is observed in the early hours of the day. A constant activation results in elevated levels of the variables in the model while a prolonged change of the oscillations in ACTH and cortisol concentrations is the most pronounced result of different LPS doses predicted by the model.

Bidragets oversatte titelIntegreret model af inflammatorisk stress
OriginalsprogEngelsk
TidsskriftBulletin of Mathematical Biology
Vol/bind79
Udgave nummer7
Sider (fra-til)1487-1509
ISSN0092-8240
DOI
StatusUdgivet - 22 jun. 2017

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