Regulation of Intestinal and Hepatic Lipoprotein Production by Glucose and Fructose

NCT ID: NCT01694446

Last Updated: 2015-03-10

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 14 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2011-09-30
• Study Completion Date: 2013-01-31

Brief Summary

Increased postprandial plasma triglycerides are associated with increased cardiovascular risk. Chronic consumption of carbohydrates is associated with increased levels of triglycerides. Very few studies have assessed the effect of acute consumption of carbohydrates on plasma triglycerides and lipoprotein production and clearance. The present study aims to assess the effects of acute administration of glucose and fructose on hepatic and intestinal lipoprotein production.

Detailed Description

Each subject will be studied twice 4-6 weeks apart in random order in this single blinded study. A nasoduodenal tube will be sited under fluoroscopic guidance the day prior to the study.In study A they will receive intraduodenal intralipid (20% at 60 ml/hour) alongside 60 ml/hour of 20% dextrose or fructose for 15 hours starting at 4am. In study B they will receive 60 ml/hour of intraduodenal intralipid with 60ml/hour of normal saline for 15 hours from 4am. A pancreatic clamp (octreotide with replacement glucose, insulin, glucagon and growth hormone) will be started at 7am. From 9am an iv bolus of deuterated-glycerol (d5-glycerol) along with a regular infusion of deuterated leucine (L-[5,5,5-2H3]. Regular blood samples will be drawn to assess lipoprotein kinetics.

Conditions

Hyperlipidemia

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: SINGLE

Study Groups

Intraduodenal glucose or fructose

Group Type: EXPERIMENTAL

Intraduodenal glucose or fructose

Intervention Type: OTHER

Interventions

Intraduodenal glucose or fructose

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

1. Men and women, aged 18 to 60 years

2. Body mass index 20 kg/m2 to 27 kg/m2

3. Hemoglobin above 130g/L.

4. Normal glucose tolerance in response to a 75g, 2-hr OGTT

Exclusion Criteria

1. Subject has a history of hepatitis/hepatic disease that has been active within the previous two years.

2. Any significant active (over the past 12 months) disease of the gastrointestinal, pulmonary, neurological, renal (Cr > 1.5 mg/dL), genitourinary, hematological systems, or has severe uncontrolled treated or untreated hypertension (sitting diastolic BP > 100 or systolic > 180) or proliferative retinopathy

3. History of diabetes or OGTT indicative of diabetes or impaired glucose tolerance.

4. Any history of a MI or clinically significant, active, cardiovascular history including a history of arrhythmia's or conduction delays on ECG, unstable angina, or decompensated heart failure.

5. Any laboratory values: AST > 2x ULN; ALT > 2x ULN TSH > 6 mU/l

6. Current addiction to alcohol or substances of abuse as determined by the investigator.

7. Mental incapacity, unwillingness or language barrier precluding adequate understanding or cooperation

8. Taking any prescription or non-prescription medications at the time of the study

9. Having donated blood three months prior to and three months post study procedures

10. A pregnancy test will be performed 1 to 3 days prior to each study in all female subjects. Those who test positive for pregnancy will be excluded.

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• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 60 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University Health Network, Toronto

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Toronto General Hopital

Toronto, Ontario, Canada

Countries

Canada

Other Identifiers

Glucose 090428B

Identifier Type: -

Identifier Source: org_study_id