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Immunonutrition in Surgical Patients

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Abstract:

Purpose of the review: To outline recent findings concerning the efficacy of immunonutrients in patients undergoing surgery.

Recent findings: Surgery induces an inflammatory response that can become excessive and damaging in some patients. The major risk factors are pre-existing nutritional status and increasing levels of surgical stress. A range of nutrients, including several amino acids, antioxidant vitamins and minerals, ω-3 fatty acids, and nucleotides, are able to modulate inflammation and the associated oxidative stress, and maintain or improve immune function. Considering the overall treatment effect of immune-modulating nutrients, parenteral glutamine is recommended in patients receiving parenteral nutrition, while enteral glutamine should be considered for burn and trauma patients. Antioxidants, particularly selenium, should be considered for critically ill patients, and enteral formulas enriched with fish oils are recommended for patients with acute respiratory distress syndrome. Arginine-supplemented diets are not recommended.

In summary, malnourished patients should receive preoperative artificial nutrition for at least 10 days prior to major surgery and for 7 days postoperatively. Enteral nutrition is the best support for these patients. The benefit of immuneenhancing diets in severely malnourished patients remains to be proven. Preoperative oral immunonutrition (arginine, omega-3 fatty acids, and nucleotides) is indicated for non-malnourished patients. Although patients with cancer exhibit some special metabolic features, preoperative immunonutrition is also indicated.

Summary: Immunonutrition is effective in improving outcome in a wide range of patients, particularly in malnourished individuals. However, further research using larger, better-designed trials is needed to assess whether immune function is benefited, with an improved clinical outcome in vulnerable patients.

Document Type: Research Article

DOI: http://dx.doi.org/10.2174/138945009788982432

Publication date: August 1, 2009

More about this publication?
  • Current Drug Targets aims to cover the latest and most outstanding developments on the medicinal chemistry and pharmacology of molecular drug targets e.g. disease specific proteins, receptors, enzymes, genes. Each issue of the journal will be devoted to a single timely topic, with series of in-depth reviews, written by leaders in the field, covering a range of current topics on drug targets. These issues will be organized and led by a guest editor who is a recognized expert in the overall topic. As the discovery, identification, characterisation and validation of novel human drug targets for drug discovery continues to grow; this journal will be essential reading for all pharmaceutical scientists involved in drug discovery and development.
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