Imperial College London
Alternate

ProfessorStephenBrett

Faculty of Medicine, Department of Surgery & Cancer

Professor of Critical Care
 
 
 
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Contact

 

+44 (0)20 3313 4521stephen.brett Website

 
 
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Location

 

Hammersmith House 570Hammersmith HospitalHammersmith Campus

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Summary

 

Publications

Citation

BibTex format

@article{Hill:2015:10.1097/CCM.0000000000000854,
author = {Hill, NE and Saeed, S and Phadke, R and Ellis, MJ and Chambers, D and Wilson, DR and Castells, J and Morel, J and Freysennet, DG and Brett, SJ and Murphy, KG and Singer, M},
doi = {10.1097/CCM.0000000000000854},
journal = {Crit Care Med},
pages = {e84--e96},
title = {Detailed characterization of a long-term rodent model of critical illness and recovery.},
url = {http://dx.doi.org/10.1097/CCM.0000000000000854},
volume = {43},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - OBJECTIVE: To characterize a long-term model of recovery from critical illness, with particular emphasis on cardiorespiratory, metabolic, and muscle function. DESIGN: Randomized controlled animal study. SETTING: University research laboratory. SUBJECTS: Male Wistar rats. INTERVENTIONS: Intraperitoneal injection of the fungal cell wall constituent, zymosan or n-saline. MEASUREMENTS AND MAIN RESULTS: Following intervention, rats were followed for up to 2 weeks. Animals with zymosan peritonitis reached a clinical and biochemical nadir on day 2. Initial reductions were seen in body weight, total body protein and fat, and muscle mass. Leg muscle fiber diameter remained subnormal at 14 days with evidence of persisting myonecrosis, even though gene expression of regulators of muscle mass (e.g., MAFbx, MURF1, and myostatin) had peaked on days 2-4 but normalized by day 7. Treadmill exercise capacity, forelimb grip strength, and in vivo maximum tetanic force were also reduced. Food intake was minimal until day 4 but increased thereafter. This did not relate to appetite hormone levels with early (6 hr) rises in plasma insulin and leptin followed by persisting subnormal levels; ghrelin levels did not change. Serum interleukin-6 level peaked at 6 hours but had normalized by day 2, whereas interleukin-10 remained persistently elevated and high-density lipoprotein cholesterol persistently depressed. There was an early myocardial depression and rise in core temperature, yet reduced oxygen consumption and respiratory exchange ratio with a loss of diurnal rhythmicity that showed a gradual but incomplete recovery by day 7. CONCLUSIONS: This detailed physiological, metabolic, hormonal, functional, and histological muscle characterization of a model of critical illness and recovery reproduces many of the findings reported in human critical illness. It can be used to assess putative therapies that may attenuate loss, or enhance recovery, of muscle mass and function.
AU  - Hill,NE
AU  - Saeed,S
AU  - Phadke,R
AU  - Ellis,MJ
AU  - Chambers,D
AU  - Wilson,DR
AU  - Castells,J
AU  - Morel,J
AU  - Freysennet,DG
AU  - Brett,SJ
AU  - Murphy,KG
AU  - Singer,M
DO  - 10.1097/CCM.0000000000000854
EP  - 96
PY  - 2015///
SP  - 84
TI  - Detailed characterization of a long-term rodent model of critical illness and recovery.
T2  - Crit Care Med
UR  - http://dx.doi.org/10.1097/CCM.0000000000000854
UR  - https://www.ncbi.nlm.nih.gov/pubmed/25700075
UR  - http://hdl.handle.net/10044/1/21531
VL  - 43
ER  -
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