Comparing Soybean Oil-Based (Intralipid) With an Olive Oil-Based (ClinOleic) Lipid Emulsion on Healthy Volunteers (TPN1)

Comparing Soybean Oil-Based (Intralipid) With an Olive Oil-Based (ClinOleic) Lipid Emulsion on Healthy Volunteers

Randomized Study Comparing Soybean Oil-Based (Intralipid) With an Olive Oil-Based (ClinOleic) Lipid Emulsion: Effects on Endothelial Function, Inflammatory Markers, Oxidative Stress, Immune Function, Autonomic Nervous System, Insulin Sensitivity and Carbohydrate Metabolism

Many patients in the hospital who are malnourished or not eating received intravenous feeding or total parenteral nutrition (TPN). Despite improving nutrition, TPN may increase the risk of infections and hospital complications. We do not know why TPN increases hospital complications, but it may be caused by the high sugar or fat content in TPN solutions. The investigators believe that the high sugar and high fat content can limit the ability to fight infections and produce stiffness of blood vessels. This study will compare the effect of high sugar, high fat content or both on blood sugars, blood vessel function, on blood vessel function. The investigators will also compare the effect of different fats (olive oil and soybean) in the TPN solution on the risk of infection and blood vessel function on a total of 12 healthy subjects.

Subjects receive 24 hours of infusion of 0.9% normal saline, dextrose (sugar) without fat, ClinOleic (olive oil-based), and Intralipid (soybean-derived fat)

Endothelium-dependent brachial artery flow-mediated dilation (FMD) was assessed. Ultrasound images of the brachial artery were obtained and arterial diameters were measured with customized software. Brachial artery FMD was calculated as (hyperemic diameter - baseline diameter)/baseline diameter × 100.

Endothelium-dependent brachial artery flow-mediated dilation (FMD) was assessed. Ultrasound images of the brachial artery were obtained and arterial diameters were measured with customized software. Brachial artery FMD was calculated as (hyperemic diameter - 4 hour diameter)/4 hour diameter × 100.

Endothelium-dependent brachial artery flow-mediated dilation (FMD) was assessed. Ultrasound images of the brachial artery were obtained and arterial diameters were measured with customized software. Brachial artery FMD was calculated as (hyperemic diameter - 24 hour diameter)/24 hour diameter × 100.

Inclusion Criteria: Healthy males or females, BMI 25 - 35 kg/m2, between the ages of 18 and 65 years Exclusion Criteria: The patient is pregnant or breast feeding Subjects have or with history of diabetes, hypertension, fasting triglyceride levels > 250 mg/dL, liver disease (ALT 2.5x > upper limit of normal), serum creatinine ≥1.5 mg/dL Smokers or ex-smoker < 3 months of cessation, drug or alcohol abuse Mental condition rendering the subject unable to understand the scope and possible consequences of the study.

Siqueira J, Smiley D, Newton C, Le NA, Gosmanov AR, Spiegelman R, Peng L, Osteen SJ, Jones DP, Quyyumi AA, Ziegler TR, Umpierrez GE. Substitution of standard soybean oil with olive oil-based lipid emulsion in parenteral nutrition: comparison of vascular, metabolic, and inflammatory effects. J Clin Endocrinol Metab. 2011 Oct;96(10):3207-16. doi: 10.1210/jc.2011-0480. Epub 2011 Aug 10.