The Efficacy of Red Grape Seed Extract on Lipid Profile and Oxidized Low-Density Lipoprotein (OX-LDL)

Summary

Antioxidants are potent scavengers of free radicals and serve as inhibitors of neoplastic processes. A large number of synthetic and natural antioxidants are known to induce beneficial effects on human health and disease prevention. Cardioprotective ability of grape seed extract polyphenols (GSEP) was studied in animals and humans. It has been suggested that grape seed proanthocyanidins have cardioprotective effects against reperfusion-induced injury of free radicals after ischemia. In another study, it is suggested that proanthocyanidins, the major polyphenols in red wine, might trap reactive oxygen species in aqueous series such as plasma and interstitial fluid of the arterial wall; thereby inhibiting oxidation of low-density lipoprotein (LDL) and showing an antiatherosclerotic activity. The only human model study designed to evaluate the effect of a standardized formulation of a GSEP (leucoselect-phytosome \[LP\]) on the susceptibility of LDL to oxidation in a group of heavy smokers, revealed that the antioxidant potential of GSEP may be effective in oxidative stress (smoking); however more investigational data are needed before wider use in clinical settings. Based on these observations, the investigators decided to evaluate the effect of GSEP in reducing OX-LDL in patients diagnosed with mild hyperlipidemia.

Conditions

• Hyperlipidemia

Interventions

DRUG

Grape Seed Extract (Vitagrape)

Drug {Each Containing: Grape Seed Extract100 mg +...} 1 capsule twice daily for 2 months

DRUG

Placebo of Grape Seed Extract

Placebo {Each Containing: Gelatin 17mg + Cellulose Microcrystalline (Avicel) 67 mg + Dicalcium Phosphate 216mg} 1 capsule twice daily for 2 months

Sponsors & Collaborators

• Tabriz University

  collaborator OTHER

• Shahid Beheshti University of Medical Sciences

  lead OTHER

Principal Investigators

• Maryam Keshtkar-Jahromi, MD, · Shahid Beheshti University (MC)

• Hassan Argani, MD · Shahid Beheshti University (MC)

• Abbas Delazar, PhD · Tabriz University

• Ali Eskandari, MD · Shahid Beheshti University (MC)

• Sharareh Gholamin, MD · Shahid Beheshti University (MC)

• Seyed Mostafa Razavi, MD · Shahid Beheshti University (MC)

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Model

CROSSOVER

Eligibility

Min Age

21 Years

Max Age

64 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2008-07-31

Primary Completion

2008-12-31

Completion

2009-02-28

Countries

• Iran

Study Locations