In Vitro And Ex Vivo Anti-Inflammatory Activities Of Salmon Polar Lipids

The aim of this project is to study the effects of a new-developed food-supplement that contains bioactive polar lipids derived from organic farmed Irish salmon for the beneficial promotion of cardiovascular health. The health claims that will be formulated for this nutraceutical are based on EFSA guidelines "The scientific requirements for health claims related to antioxidants, oxidative damage and cardiovascular health" and in particular paragraph 5.4, "Claims on reduced platelet aggregation" "Platelet hyperactivity and hypercoagulability states are more commonly observed in subjects with cardiovascular (CV) risk factors. Healthy subjects at very low risk of CV disease normally have non-activated circulating platelets. Decreasing platelet aggregation in subjects with platelet activation during sustained exposure to the food/constituent (e.g. four weeks) would be a beneficial physiological effect".

Within this study, the postprandial effects of this novel food supplement against platelet aggregation and inflammation are going to be exploited ex vivo in blood from human subjects as described in previously established procedures.

Study Overview

• Status: Completed
• Conditions: Cardiovascular Diseases
• Intervention / Treatment: Dietary supplement: Food supplement capsules containing Salmon-Polar Lipids; Dietary supplement: Placebo food supplement capsule

• Study Type: Interventional
• Enrollment (Actual): 6
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Ireland
  • Co. Limerick
    • Limerick, Co. Limerick, Ireland, V94 T9PX
      • Department of Biological Sciences

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

Subjects need to:

• Have their dietary intake of fish to be within normal range (1-2 portions per week).

Exclusion Criteria:

Subjects will be excluded if they:

• Are currently taking medication and/or dietary supplements
• Have blood clotting disorders or dislipidemia

Study Plan

How is the study designed?

Design Details

• Primary Purpose: PREVENTION
• Allocation: RANDOMIZED
• Interventional Model: SEQUENTIAL
• Masking: DOUBLE

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
EXPERIMENTAL: Group A: Food Supplement (Salmon Polar Lipids) Intervention; Experimental: After fasting overnight, subjects will come to our metabolic unit where in a randomized and double blinded way they will be provided several versions of the food supplement either of stomach resistant (intestine release) or stomach non-resistant (stomach release) each containing either 0.25 (Low Dose) or 0.50 g (High Dose) of Salmon Polar Lipids (SPL) Assessment & outcome measured: Blood samples will be taken from each subject at baseline (0 hours) and after 1-4 hours of the SPL-food supplement intervention. Aggregation of platelets will be assessed in these samples as previously described (see references 1-4), in order to evaluate the postprandial effects of this supplement on platelet aggregation. Other blood coagulation parameters will also be evaluated, such as prothrombin time, fibrinogen, Activated partial thromboplastin time Plasma lipid profile (levels of plasma Total Cholesterol, LDL, HDL and Triglycerides) and serum CRP levels will also be assessed.	Dietary supplement: Food supplement capsules containing Salmon-Polar Lipids; Postprandial decreased Platelet activation/aggregation in subjects, after the food supplement capsule consumption
PLACEBO_COMPARATOR: Group B: Consumption of Placebo Comparator; Experimental: After fasting overnight subjects will come to the metabolic unit in UL at 08.00 am where in a randomized and double blinded way they will be provided a placebo capsule containing only glycerin. Assessment & outcome measured: Blood samples will be taken from each subject at baseline (0 hours) and after 1-4 hours of the placebo administration. Aggregation of their platelets will be assessed as previously described (see references 1-4), in order to evaluate the postprandial effects of this supplement on platelet aggregation. Other blood coagulation parameters will also be evaluated, such as prothrombin time, fibrinogen, Activated partial thromboplastin time Plasma lipid profile (levels of plasma Total Cholesterol, LDL, HDL and Triglycerides) and serum CRP levels will also be assessed.	Dietary supplement: Placebo food supplement capsule; Postprandial unaffected platelet activation/aggregation in subjects, after the food supplement capsule consumption

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Postprandial effect of Supplement/placebo on human platelet aggregation induced by Platelet Activating Factor (PAF)	Bio-assays on platelets will be assessed as previously described. Briefly: Standard PAF dissolved in BSA will have final concentrations 2.6e-8 - 2.6e-5 mol/L when testing into a Chronolog-490 two channel turbidimetric platelet aggregometer. The maximum reversible or the minimum irreversible PAF-induced platelet aggregation is determined as the 100% aggregation, and then various PAF concentrations are added, so as to achieve aggregations between 20% and 80% aggregation, which are of linear response to the added PAF concentration. The EC50 value that accounts for the PAF concentration (mol/L) inducing 50% aggregation of human platelets will be calculated by the equation derived from this linear curve. Results will be expressed as percentage change of EC50 on 1, 2, 3 and 4 hours of the food supplement/placebo administration, compared with baseline (0 hours)	2 Months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Postprandial effect of Supplement/placebo on human platelet aggregation induced by Thrombin	Bio-assays on platelets will be assessed as previously described. Briefly: Standard active thrombin dissolved in saline will have final concentrations 0.01 - 1.0 IU/mL when testing into a Chronolog-490 two channel turbidimetric platelet aggregometer. The maximum reversible or the minimum irreversible Thrombin-induced platelet aggregation is determined as the 100% aggregation, and then various Thrombin concentrations are added, so as to achieve aggregations between 20% and 80% aggregation, which are of linear response to the added Thrombin concentration. The EC50 value that accounts for the Thrombin concentration (IU/mL) inducing 50% aggregation of human platelets will be calculated by the equation derived from this linear curve. Results will be expressed as percentage change of EC50 on 1, 2, 3 and 4 hours of the food supplement/placebo administration, compared with baseline (0 hours).	2 Months

Collaborators and Investigators

• Sponsor: University of Limerick
• Investigators: Principal Investigator: Ioannis Zabetakis, Dr, University of Limerick

Publications and helpful links

General Publications

• Tsoupras A, Lordan R, Demuru M, Shiels K, Saha SK, Nasopoulou C, Zabetakis I. Structural Elucidation of Irish Organic Farmed Salmon (Salmo salar) Polar Lipids with Antithrombotic Activities. Mar Drugs. 2018 May 23;16(6):176. doi: 10.3390/md16060176.
• Nasopoulou C, Tsoupras AB, Karantonis HC, Demopoulos CA, Zabetakis I. Fish polar lipids retard atherosclerosis in rabbits by down-regulating PAF biosynthesis and up-regulating PAF catabolism. Lipids Health Dis. 2011 Nov 16;10:213. doi: 10.1186/1476-511X-10-213.
• Tsantila N, Tsoupras AB, Fragopoulou E, Antonopoulou S, Iatrou C, Demopoulos CA. In vitro and in vivo effects of statins on platelet-activating factor and its metabolism. Angiology. 2011 Apr;62(3):209-18. doi: 10.1177/0003319710375089. Epub 2010 Aug 29.
• Xanthopoulou MN, Kalathara K, Melachroinou S, Arampatzi-Menenakou K, Antonopoulou S, Yannakoulia M, Fragopoulou E. Wine consumption reduced postprandial platelet sensitivity against platelet activating factor in healthy men. Eur J Nutr. 2017 Jun;56(4):1485-1492. doi: 10.1007/s00394-016-1194-0. Epub 2016 Mar 2.

Study record dates

Study Major Dates

• Study Start (ACTUAL): September 3, 2018
• Primary Completion (ACTUAL): November 30, 2018
• Study Completion (ACTUAL): January 31, 2019

Study Registration Dates

• First Submitted: December 7, 2017
• First Submitted That Met QC Criteria: July 26, 2018
• First Posted (ACTUAL): July 27, 2018

Study Record Updates

• Last Update Posted (ACTUAL): December 19, 2019
• Last Update Submitted That Met QC Criteria: December 18, 2019
• Last Verified: December 1, 2019

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Cardiovascular Diseases
• Other Study ID Numbers: IP 2017 0518

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No