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DiabetesFFAADANCT00721617

FFA Hypertension and Inflammation in Lean and Obese Subjects

A study testing Intralipid 20%, Normal Saline and Oral fat load in people with Diabetes and Hypertension, run by Emory University at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Although a large number of obese patients develop high blood pressure, the cause is unknown. The purpose of this study is to look at the effect of high fatty acids (a type of fat) in the development of high blood pressure in obese people. Read more about this study

Who is it for?
Ages 18 to 65 yearsHealthy volunteers can take part
Conditions the study is for
Diabetes, Hypertension, Obesity
What is being tested?
Intralipid 20%, Normal Saline and Oral fat load
Could I receive a placebo?
No, everyone receives an active treatment
How many people
12 participants
Where
1 siteUnited States
Study dates
Apr 2009to Jun 2011
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 65 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Males or females
  • Obese subjects (body mass index (BMI) ≥ 30 kg/m^2)
  • 18 and 65 years
  • Blood pressure reading < 140/80 mm Hg and no prior history of hypertension

Who cannot join

  • History of diabetes mellitus
  • History of hypertension
  • Fasting triglyceride levels > 250 mg/dL
  • Liver disease (ALT 2.5x > upper limit of normal)
  • Serum creatinine ≥1.5 mg/dL
  • Smokers, drug or alcohol abuse
  • Mental condition rendering the subject unable to understand the scope and possible consequences of the study
  • Female subjects who are pregnant or breast feeding

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Grady Memorial Hospital

    Atlanta, Georgia, 30303

Other trials in United States

About this study

Official title: Free Fatty Acids-Induced Hypertension, Endothelial Dysfunction, Inflammation, Insulin Resistance, and Autonomic Dysfunction in Lean and Obese Subjects

Although a large number of obese patients develop high blood pressure, the cause is unknown. The purpose of this study is to look at the effect of high fatty acids (a type of fat) in the development of high blood pressure in obese people.

Read the detailed description

Recent studies indicate that increased levels of a circulating fat (free fatty acids or FFAs) increases blood pressure, impairs endothelial (vascular) function, and increases inflammatory markers in subjects with and without diabetes. The effects of FFA on blood pressure and vasculature have not been fully investigated. A group of 12 obese nondiabetic, normotensive subjects will be admitted to the Grady Clinical Research Center (GCRC) on separate 4 occasions. Research subjects will receive, in random order, a 8-hour intravenous (IV) infusion of Intralipid 20% at 40 mL/h (a fat solution), 8-hour IV infusion of normal saline at 40 mL/h, 8-hour IV infusion of dextrose (sugar) 10% at 40 mL/h, and a 8-hour intravenous (IV) infusion combination of Intralipid 20% and dextrose 10% at 40mL/h.

Being tested
Intralipid 20%, Normal Saline, Oral fat load
Medical subject headings
Diabetes Mellitus, Hypertension, Obesity

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Intralipid 20%Other

    Lean and obese normotensive subjects will receive Intralipid 20% infusion. Intralipid is an oil-in-water emulsion derived from egg phospholipids, soybean, and glycerol. The Intralipid 20% long-chain triglyceride emulsion contains: 200 g of soy bean oil; 12 g of egg yolk; 25 g of glycerol. The emulsion is composed of the following free fatty acids (FFAs): linoleic acid: 50%, oleic acid: 26%, palmitic acid: 10%, stearic acid: 9%, egg yolk, phospholipids: 3.5% It will be given intravenously at 20 ml/hr (96 g/24 h) for 24 hours.

  • Normal SalineOther

    Lean and obese normotensive subjects will receive normal saline at 20 ml/hr for 24 hours.

  • Oral fat loadOther

    Lean and obese normotensive subjects will receive an oral fat load at 96 g/24hr. The oral liquid fat load will be given in equal amounts (16 g) every 4 hours (total 96 g over 24 hours).

Study groups in NCT00721617
Study groupRoleWhat they receive
Obese subjectsActive comparatorObese normotensive subjects will receive 24 hour challenges on 3 separate occasions, in a random order, with IV Normal Saline at 20ml/hour, IV Intralipid (20% solution at 20 ml/hour and an oral fat load (96g/24 hours)
Receives: Other: Intralipid 20%; Other: Normal Saline; Other: Oral fat load
Lean subjectsActive comparatorLean normotensive subjects will receive 24 hour challenges on 3 separate occasions, in a random order, with IV Normal Saline at 20ml/hour, IV Intralipid (20% solution at 20 ml/hour and an oral fat load (96g/24 hours)
Receives: Other: Intralipid 20%; Other: Normal Saline; Other: Oral fat load

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in Flow-mediated Dilation From Baseline to 4 Hours

    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. FMD is expressed as the change in diameter from baseline to 4 hours.

    Measured: Baseline, 4 hours

  2. Change in Systolic Blood Pressure From Baseline to 4 Hours

    Systolic blood pressure is the amount of pressure the heart generates when pumping blood through the arteries to the body. Current guidelines identify normal systolic blood pressure as lower than 120 mmHg. Blood pressure was measured in triplicate with a manual cuff prior to and every 4 hours during the 8 hour infusion with subjects in supine position. Change is the difference between 4 hour systolic blood pressure from baseline systolic blood pressure.

    Measured: Baseline, 4 hours

  3. Change in Systolic Blood Pressure From Baseline to 8 Hours

    Systolic blood pressure is the amount of pressure your heart generates when pumping blood through your arteries to the rest of your body. Current guidelines identify normal systolic blood pressure as lower than 120 mmHg. Blood pressure was measured in triplicate with a manual cuff prior to and every 4 hours during the 8 hour infusion with subjects in supine position. Change is the difference between 8 hour systolic blood pressure from baseline systolic blood pressure.

    Measured: Baseline, 8 hours

  4. Change in Diastolic Blood Pressure From Baseline to 4 Hours

    Diastolic blood pressure is the amount of pressure in your arteries when your heart is at rest between beats. Current guidelines identify normal diastolic blood pressure as lower than 80 mmHg. Blood pressure was measured in triplicate with a manual cuff prior to and every 4 hours during the 8 hour infusion with subjects in supine position. Change is the difference between 4 hour diastolic blood pressure from baseline diastolic blood pressure.

    Measured: Baseline, 4 hours

  5. Change in Diastolic Blood Pressure From Baseline to 8 Hours

    Diastolic blood pressure is the amount of pressure in your arteries when your heart is at rest between beats. Current guidelines identify normal diastolic blood pressure as lower than 80 mmHg. Blood pressure was measured in triplicate with a manual cuff prior to and every 4 hours during the 8 hour infusion with subjects in supine position. Change is the difference between 8 hour diastolic blood pressure from baseline diastolic blood pressure.

    Measured: Baseline, 8 hours

Secondary outcomes (16)
  1. Change in FFA (Free Fatty Acid) Levels From Baseline to 4 Hours

    Blood samples were collected for measurement of free fatty acids (FFA) at baseline and 4 hours after each infusion. FFA levels were determined by colorimetric method. Current guidelines identify normal range of FFA level as less than 0.72 mmol/L. Elevated plasma levels of FFA indicate a greater rate of insulin resistance. Change is the difference between 4 hour FFA levels from baseline FFA levels.

    Measured: Baseline, 4 hours

  2. Changes in FFA (Free Fatty Acid) Levels From Baseline to 8 Hours

    Blood samples were collected for measurement of free fatty acids (FFA) at baseline and 8 hours after each infusion. FFA levels were determined by colorimetric method. Current guidelines identify normal range of FFA level as less than 0.72 mmol/L. Elevated plasma levels of FFA indicate a greater rate of insulin resistance. Change iis the difference between 8 hour FFA levels from baseline FFA levels.

    Measured: Baseline, 8 hours

  3. Change in Triglyceride Levels From Baseline to 4 Hours

    Blood samples were collected for measurement of triglycerides at baseline and 4 hours after each infusion. Triglyceride levels were measured on CX7 Chemistry Analyzer. Current guidelines identify normal range of triglyceride level as less than 150 mg/dL. Elevated levels of triglycerides are associated with an increased risk of developing heart disease. Change is the difference between 4 hour triglyceride levels from baseline triglyceride levels.

    Measured: Baseline, 4 hours

  4. Change in Triglyceride Levels From Baseline to 8 Hours

    Blood samples were collected for measurement of triglycerides at baseline and 4 hours after each infusion. Triglyceride levels were measured on CX7 Chemistry Analyzer. Current guidelines identify normal range of triglyceride level as less than 150 mg/dL. Elevated levels of triglycerides are associated with an increased risk of developing heart disease. Change is the difference between 8 hour triglyceride levels from baseline triglyceride levels.

    Measured: Baseline, 8 hours

  5. Plasma Glucose Levels for Saline Infusion

    Blood samples were collected for measurement of plasma glucose levels at baseline, 4 hours after saline infusion, and 8 hours after saline infusion. Plasma glucose was measured on CX7 Chemistry Analyzer. Current guidelines identify normal fasting glucose as less than 100 mg/dL. High levels of glucose most frequently indicates diabetes.

    Measured: Baseline, 4 hours, 8 hours

  6. Plasma Glucose Levels for Intralipid Infusion

    Blood samples were collected for measurement of plasma glucose levels at baseline, 4 hours after intralipid infusion, and 8 hours after intralipid infusion. Plasma glucose was measured on CX7 Chemistry Analyzer. Current guidelines identify normal fasting glucose as less than 100 mg/dL. High levels of glucose most frequently indicates diabetes.

    Measured: Baseline, 4 hours, 8 hours

  7. Plasma Glucose Levels for Dextrose Infusion

    Blood samples were collected for measurement of plasma glucose levels at baseline, 4 hours after dextrose infusion, and 8 hours after dextrose infusion. Plasma glucose was measured on CX7 Chemistry Analyzer. Current guidelines identify normal fasting glucose as less than 100 mg/dL. High levels of glucose most frequently indicates diabetes.

    Measured: Baseline, 4 hours, 8 hours

  8. Plasma Glucose Levels for Intralipid/Dextrose Infusion

    Blood samples were collected for measurement of plasma glucose levels at baseline, 4 hours after intralipid/dextrose infusion, and 8 hours after intralipid/dextrose infusion. Plasma glucose was measured on CX7 Chemistry Analyzer. Current guidelines identify normal fasting glucose as less than 100 mg/dL. High levels of glucose most frequently indicates diabetes.

    Measured: Baseline, 4 hours, 8 hours

  9. Insulin Levels for Saline Infusion

    Blood samples were collected for the measurement of insulin levels at baseline, 4 hours after saline infusion, and 8 hours after saline infusion. Insulin was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal insulin levels as 8.8 μU/mL for men and 8.4 for women. High levels of insulin most frequently indicate insulin resistance or hypoglycemia, if paired with a low glucose level. Low levels of insulin paired with high glucose level can indicate diabetes.

    Measured: Baseline, 4 hours, 8 hours

  10. Insulin Levels for Intralipid Infusion

    Blood samples were collected for the measurement of insulin levels at baseline, 4 hours after intralipid infusion, and 8 hours after intralipid infusion. Insulin was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal insulin levels as 8.8 μU/mL for men and 8.4 for women. High levels of insulin most frequently indicate insulin resistance or hypoglycemia, if paired with a low glucose level. Low levels of insulin paired with high glucose level can indicate diabetes.

    Measured: Baseline, 4 hours, 8 hours

  11. Insulin Levels for Dextrose Infusion

    Blood samples were collected for the measurement of insulin levels at baseline, 4 hours after dextrose infusion, and 8 hours after dextrose infusion. Insulin was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal insulin levels as 8.8 μU/mL for men and 8.4 for women. High levels of insulin most frequently indicate insulin resistance or hypoglycemia, if paired with a low glucose level. Low levels of insulin paired with high glucose level can indicate diabetes.

    Measured: Baseline, 4 hours, 8 hours

  12. Insulin Levels for Intralipid/Dextrose Infusion

    Blood samples were collected for the measurement of insulin levels at baseline, 4 hours after intralipid/dextrose infusion, and 8 hours after intralipid/dextrose infusion. Insulin was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal insulin levels as 8.8 μU/mL for men and 8.4 for women. High levels of insulin most frequently indicate insulin resistance or hypoglycemia, if paired with a low glucose level. Low levels of insulin paired with high glucose level can indicate diabetes.

    Measured: Baseline, 4 hours, 8 hours

  13. C-peptides Levels for Saline Infusion

    Blood samples were collected for the measurement of C-peptide levels at baseline, 4 hours after saline infusion, and 8 hours after saline infusion. C-peptide was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal C-peptide levels as 0.51 to 2.72 ng/mL.

    A high level of C-peptide generally indicates a high level of endogenous insulin production. This may be in response to a high blood glucose caused by glucose intake and/or insulin resistance. A high level of C-peptide is also seen with insulinomas and may be seen with low blood potassium, Cushing syndrome, and renal failure. A low level of C-peptide is associated with a low level of insulin production. This can occur when insufficient insulin is being produced by the beta cells, with diabetes for example, or when production is suppressed by treatment with exogenous insulin.

    Measured: Baseline, 4 hours, 8 hours

  14. C-peptides Levels for Intralipid Infusion

    Blood samples were collected for the measurement of C-peptide levels at baseline, 4 hours after Intralipid infusion, and 8 hours after Intralipid infusion. C-peptide was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal C-peptide levels as 0.51 to 2.72 ng/mL.

    A high level of C-peptide generally indicates a high level of endogenous insulin production. This may be in response to a high blood glucose caused by glucose intake and/or insulin resistance. A high level of C-peptide is also seen with insulinomas and may be seen with low blood potassium, Cushing syndrome, and renal failure. A low level of C-peptide is associated with a low level of insulin production. This can occur when insufficient insulin is being produced by the beta cells, with diabetes for example, or when production is suppressed by treatment with exogenous insulin.

    Measured: Baseline, 4 hours, 8 hours

  15. C-peptides Levels for Dextrose Infusion

    Blood samples were collected for the measurement of C-peptide levels at baseline, 4 hours after dextrose infusion, and 8 hours after dextrose infusion. C-peptide was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal C-peptide levels as 0.51 to 2.72 ng/mL.

    A high level of C-peptide generally indicates a high level of endogenous insulin production. This may be in response to a high blood glucose caused by glucose intake and/or insulin resistance. A high level of C-peptide is also seen with insulinomas and may be seen with low blood potassium, Cushing syndrome, and renal failure. A low level of C-peptide is associated with a low level of insulin production. This can occur when insufficient insulin is being produced by the beta cells, with diabetes for example, or when production is suppressed by treatment with exogenous insulin.

    Measured: Baseline, 4 hours, 8 hours

  16. C-peptides Levels for Intralipid/Dextrose Infusion

    Blood samples were collected for the measurement of C-peptide levels at baseline, 4 hours after intralipid/dextrose infusion, and 8 hours after intralipid/dextrose infusion. C-peptide was measured in plasma using a solid phase, two-site sequential chemiluminescent immunometric assays on the DPC Immulite analyzer. Current guidelines identify normal C-peptide levels as 0.51 to 2.72 ng/mL.

    A high level of C-peptide generally indicates a high level of endogenous insulin production. This may be in response to a high blood glucose caused by glucose intake and/or insulin resistance. A high level of C-peptide is also seen with insulinomas and may be seen with low blood potassium, Cushing syndrome, and renal failure. A low level of C-peptide is associated with a low level of insulin production. This can occur when insufficient insulin is being produced by the beta cells, with diabetes for example, or when production is suppressed by treatment with exogenous insulin.

    Measured: Baseline, 4 hours, 8 hours

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted24 Jul 2008 (estimated)
  2. Study startApr 2009
  3. Primary completionJun 2011
  4. Study completionJun 2011

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Basic science
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
12 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00721617
Sponsor's protocol ID
IRB00009277
Acronym
FFAADA
Status last verified
Jul 2015
First submitted
26 Jun 2008
Last updated
27 Jul 2015
Data monitoring committee
Yes

Questions about this trial

What is this clinical trial studying?

A study testing Intralipid 20%, Normal Saline and Oral fat load in people with Diabetes and Hypertension, run by Emory University at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 27 Jul 2015. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 27 Jul 2015). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Flow-mediated Dilation From Baseline to 4 Hours (time frame: Baseline, 4 hours). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Jul 2015; AzTrials last refreshed its copy on 7 Nov 2026.

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