An interventional study of Canola Oil and High Oleic Acid + DHA Canola Oil in Cardiovascular Disease, sponsored by Penn State University. Completed at 1 site in United States. Open to participants aged 20 Years to 65 Years. Per ClinicalTrials.gov, last updated 2023-08-21.
Sponsored by Penn State University · Not applicable, Interventional, and Prevention
The objectives of this study are to examine how the consumption of treatment oils (including canola oil, DHA enriched canola-oil, high oleic acid canola oil, flax oil, and safflower oil) influence endothelial function, inflammation, oxidation, body composition, and plasma lipoprotein characterization.
The consequence of total fat consumption on circulating plasma lipids and the incidence of cardiovascular disease has long been a central theme in nutrition research. Less well known is the influence of specific fatty acids on vascular endothelial function and the oxidative and inflammatory responses characteristic of atherogenesis. Omega 3 ( ω-3) fatty acids, including plant derived alpha-linolenic acid (18:3n-3, ALA) and marine derived eicosapentaenoic (20:5n-3, EPA) and docosahexaenoic acid (22:6n-3, DHA) have been shown to effectively modulate multiple cardiovascular risk factors in epidemiological, animal model and human clinical investigations. ALA is most commonly consumed as a major component of dietary canola and flaxseed oils and has a recommended intake of 1.1 and 1.6 g/d for women and men, respectively. EPA and DHA are consumed as fatty fish or fish oil and algae supplements with current recommended intakes of 500 mg/d (combined EPA and DHA).
ALA is thought to improve cardiovascular health by modulating circulating lipid concentrations, altering membrane structure and function by enhancing the total ω-3 fatty acid content of cell membrane phospholipids, and reducing inflammatory reactions by blocking the formation of arachidonic acid derived eicosanoids. However, there are extensive knowledge gaps in our understanding of the molecular mechanisms and clinical efficacy of ω-3 fatty acids in human health and disease prevention. Therefore, the purpose of this study is to further examine these relationships.
Feeding protocol and study treatments:
The study will proceed as a double blind, randomized cross-over controlled feeding study. Each treatment phase will be 30 days in duration, separated by 4-week washout periods. Subjects will consume a fixed composition of a precisely controlled basal, weight-maintaining diet (35% energy from fat, 50% carbohydrate, and 15% protein) supplemented with 60g/d of the following treatment oils: 1) canola oil; 2) DHA enriched canola-oil; 3) high oleic acid canola oil; 4) flax/corn oil (40:60); or 5) safflower/corn oil (75:25). Study diets will be prepared in a metabolic kitchen facility at each clinical site. Three isocaloric meals will be prepared each day for every subject. A 7-day rotating menu cycle will be used. Subjects will consume at least 1 of 3 daily meals under supervision. The other meals will be prepared and packed for every subject to be taken out. The study control and intervention oils will be delivered in milkshakes provided twice daily. Subjects will be instructed to consume only the prepared meals and limit their intake of alcohol to 2 drinks/week and caffeinated calorie free beverages to 40oz (5 drinks) per day. Diets will be planned for every subject according to his/her energy requirements and will be nutritionally adequate.
4,905 studies on the registry are indexed under Cardiovascular Diseases; 919 are open to participants now.
This study's enrollment of 43 is below the median of 100 across 2,738 interventional studies indexed under Cardiovascular Diseases.
Browse Cardiovascular Diseases studies →Penn State University is the lead sponsor of 263 studies on the registry; 51 are open to participants now.
Of its 13 completed or terminated interventional studies of FDA-regulated products, 10 (77%) have results posted.
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In addition, eligibility will be based on metabolic syndrome criteria where we define eligibility on the basis of subjects having elevated waist circumference + 1 or more of the remaining 5 criteria:
Elevated blood pressure - systolic ≥130 and/or diastolic ≥85 mm HG
Exclusion Criteria:
Gall bladder removal
Dietary Supplement: Canola Oil
Dietary Supplement: High Oleic Acid + DHA Canola Oil
Dietary Supplement: High Oleic Acid Canola Oil
Dietary Supplement: Flax Oil
Dietary Supplement: Safflower Oil
60g Canola oil daily per 3000kcal diet provided in a supplemental shake
60g high oleic acid canola oil + DHA daily per 3000kcal provided in a supplemental shake
60g high oleic acid canola oil daily per 3000kcal provided in a supplemental shake
36g flax oil + 24g safflower oil daily per 3000kcal provided in a supplemental shake
45g safflower oil + 15g corn oil daily per 3000kcal provided in a supplemental shake
Endothelial Health
Study subjects will undergo endothelial health assessment by EndoPAT analysis. The EndoPat procedure will occur while the subject is lying down in a relaxed state. Throughout the study, the inflation pressure of the EndoPAT device will be electronically set to 10mm Hg below diastolic BP. Testing begins with 10 min of rest. Following rest, baseline pulse amplitude is measured from each fingertip for 5 min. Next, arterial flow is interrupted for 5 min by a cuff placed on the forearm at an occlusion pressure of 250 mmHg. Following occlusion release, pulse amplitude recording continues for 5 min.
Time frame: End of diet period 1 (week 4)
Endothelial Health
Study subjects will undergo endothelial health assessment by EndoPAT analysis. The EndoPat procedure will occur while the subject is lying down in a relaxed state. Throughout the study, the inflation pressure of the EndoPAT device will be electronically set to 10mm Hg below diastolic BP. Testing begins with 10 min of rest. Following rest, baseline pulse amplitude is measured from each fingertip for 5 min. Next, arterial flow is interrupted for 5 min by a cuff placed on the forearm at an occlusion pressure of 250 mmHg. Following occlusion release, pulse amplitude recording continues for 5 min.
Time frame: End of diet period 2 (week 12)
Endothelial Health
Study subjects will undergo endothelial health assessment by EndoPAT analysis. The EndoPat procedure will occur while the subject is lying down in a relaxed state. Throughout the study, the inflation pressure of the EndoPAT device will be electronically set to 10mm Hg below diastolic BP. Testing begins with 10 min of rest. Following rest, baseline pulse amplitude is measured from each fingertip for 5 min. Next, arterial flow is interrupted for 5 min by a cuff placed on the forearm at an occlusion pressure of 250 mmHg. Following occlusion release, pulse amplitude recording continues for 5 min.
Time frame: End of diet period 3 (week 20)
Endothelial Health
Study subjects will undergo endothelial health assessment by EndoPAT analysis. The EndoPat procedure will occur while the subject is lying down in a relaxed state. Throughout the study, the inflation pressure of the EndoPAT device will be electronically set to 10mm Hg below diastolic BP. Testing begins with 10 min of rest. Following rest, baseline pulse amplitude is measured from each fingertip for 5 min. Next, arterial flow is interrupted for 5 min by a cuff placed on the forearm at an occlusion pressure of 250 mmHg. Following occlusion release, pulse amplitude recording continues for 5 min.
Time frame: End of diet period 4 (week 28)
Endothelial Health
Study subjects will undergo endothelial health assessment by EndoPAT analysis. The EndoPat procedure will occur while the subject is lying down in a relaxed state. Throughout the study, the inflation pressure of the EndoPAT device will be electronically set to 10mm Hg below diastolic BP. Testing begins with 10 min of rest. Following rest, baseline pulse amplitude is measured from each fingertip for 5 min. Next, arterial flow is interrupted for 5 min by a cuff placed on the forearm at an occlusion pressure of 250 mmHg. Following occlusion release, pulse amplitude recording continues for 5 min.
Time frame: End of diet period 5 (week 36)
Body Composition
To assess regional changes in body fat deposition, subjects will undergo a dual energy X-ray absorptiometry (DXA) scan at baseline (beginning of study) and end of each intervention period. Waist circumference measurements also will be taken at this time to track how much fat is lost from the abdominal area of the body.
Time frame: Week 4, 12, 20, 28 and 36 - End of each diet period
Production of long chain fatty acids
On the 29th day of each diet phase you will be asked to consume three tablespoons of tagged water (known as deuterium). The movement of these tagged materials will allow us to assess the quantity of long chain fatty acids (EPA and DHA) that your body is producing in response to your diet. All of the above tagged materials are non-radioactive, non-toxic, and do not pose any health risk to you. Another fasting blood sample will be obtained when you return the next morning.
Time frame: Week 4, 12, 20, 28 and 36 - End of each diet period
Plasma Lipids
Twelve-hour fasting blood samples (30ml) will be collected on day 1, 2, 29 and 30 for analyses of plasma lipids. Blood samples obtained on day 1 and 2 will be used to measure baseline values for study endpoints, whereas blood samples obtained on the two last days will be used to measure final endpoint values.
Time frame: Week 4, 12, 20, 28 and 36 - End of each diet period
Plasma Cytokines
Twelve-hour fasting blood samples (30ml) will be collected on day 1, 2, 29 and 30 for analyses of C-reactive protein and inflammatory cytokines. Blood samples obtained on day 1 and 2 will be used to measure baseline values for study endpoints, whereas blood samples obtained on the two last days will be used to measure final endpoint values.
Time frame: Week 4, 12, 20, 28 and 36 - End of each diet period
This study is completed, as verified in Aug 2023. You cannot join it, but the record below documents what was studied.
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Penn State University