The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.
Early Parenteral Nutrition Evokes a Phenotype of Autophagy Deficiency in Liver and Skeletal Muscle of Critically Ill Rabbits
Abstract
Muscular and hepatic abnormalities observed in artificially fed critically ill patients strikingly resemble the phenotype of autophagy-deficient mice. Autophagy is the only pathway to clear damaged organelles and large ubiquitinated proteins and aggregates. Fasting is its strongest physiological trigger. Severity of autophagy deficiency in critically ill patients correlated with the amount of infused amino acids. We hypothesized that impaired autophagy in critically ill patients could partly be evoked by early provision of parenteral nutrition enriched with amino acids in clinically used amounts. In a randomized laboratory investigation, we compared the effect of isocaloric moderate-dose iv feeding with fasting during illness on the previously studied markers of autophagy deficiency in skeletal muscle and liver. Critically ill rabbits were allocated to fasting or to iv nutrition (220 kcal/d, 921 kJ/d) supplemented with 50 kcal/d (209 kJ/d) of either glucose, amino acids, or lipids, while maintaining normoglycemia, and were compared with healthy controls. Fasted critically ill rabbits revealed weight loss and activation of autophagy. Feeding abolished these responses, with most impact of amino acid-enriched nutrition. Accumulation of p62 and ubiquitinated proteins in muscle and liver, indicative of insufficient autophagy, occurred with parenteral feeding enriched with amino acids and lipids. In liver, this was accompanied by fewer autophagosomes, fewer intact mitochondria, suppressed respiratory chain activity, and an increase in markers of liver damage. In muscle, early parenteral nutrition enriched with amino acids or lipids aggravated vacuolization of myofibers. In conclusion, early parenteral nutrition during critical illness evoked a phenotype of autophagy deficiency in liver and skeletal muscle.
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Metadata
- Authors
- Derde, S., Vanhorebeek, I., Güiza, F., Derese, I., Gunst, J., Fahrenkrog, B., Martinet, W., Vervenne, H., Ververs, E.-J., Larsson, L., & Van den Berghe, G.
- Venue
- Endocrinology
- Publisher
- The Endocrine Society
- Published
- 2012-03-06
- Volume
- 153
- Issue
- 5
- Pages
- 2267-2276
- ISSN
- 0013-7227 (ISSN-L)
- 1945-7170
- OpenAlex
- W1981897621
- Cited by
- 166
- References
- 10
- FWCI
- 11.85
- Type
- journal article
- Language
- en
- Open access
- closed
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- Derde, S., Vanhorebeek, I., Güiza, F., Derese, I., Gunst, J., Fahrenkrog, B., Martinet, W., Vervenne, H., Ververs, E.-J., Larsson, L., & Van den Berghe, G. (2012). Early Parenteral Nutrition Evokes a Phenotype of Autophagy Deficiency in Liver and Skeletal Muscle of Critically Ill Rabbits. Endocrinology. https://doi.org/10.1210/en.2011-2068
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