MILESTONE® In Health & Nutrition | Consumption of extra-virgin olive oil rich in phenolic compounds improves metabolic control in patients with type 2 diabetes mellitus: a possible involvement of reduced levels of circulating visfatin
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August 25, 2017

Consumption of extra-virgin olive oil rich in phenolic compounds improves metabolic control in patients with type 2 diabetes mellitus: a possible involvement of reduced levels of circulating visfatin

Author information

Santangelo C1, Filesi C2, Varì R2, Scazzocchio B2, Filardi T3, Fogliano V4, D’Archivio M2, Giovannini C2, Lenzi A3, Morano S3, Masella R2.

1 Unit of Nutrition, Department of Veterinary Public Health and Food Safety, Italian National Institute of Health, Viale Regina Elena 299, 00161, Rome, Italy. carmela.santangelo@iss.it.
2 Unit of Nutrition, Department of Veterinary Public Health and Food Safety, Italian National Institute of Health, Viale Regina Elena 299, 00161, Rome, Italy.
3 Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Viale del Policlinico 155, 00161, Rome, Italy.
4 Food Quality and Design Group, Wageningen University, Wageningen, The Netherlands.

Abstract

AIM:

Phenolic compounds naturally contained in extra-virgin olive oil (EVOO) have demonstrated anti-inflammatory and antioxidant properties. The present study aimed at evaluating the effects of a polyphenol-rich extra-virgin olive oil (EVOO) (high-polyphenol EVOO, HP-EVOO) on the metabolic control and the production of specific pro-/anti-inflammatory adipokines in overweight patients with type 2 diabetes mellitus (T2D).

METHODS:

Eleven overweight T2D patients not in treatment with insulin were invited to follow their habitual diet for a total of 8 weeks. During the first 4 weeks (wash-out period), they were asked to consume refined olive oil (ROO, polyphenols not detectable) and then to replace ROO with HP-EVOO (25 mL/day, 577 mg of phenolic compounds/kg) for the remaining 4 weeks. Anthropometric parameters, fasting glycaemia, glycated haemoglobin (HbA1c), high-sensitive C-reactive protein, plasma lipid profile, liver function and serum levels of TNF-α, IL-6, adiponectin, visfatin and apelin were assessed at the end of each 4-week period.

RESULTS:

HP-EVOO consumption significantly reduced fasting plasma glucose (P = 0.023) and HbA1c (P = 0.039) levels as well as BMI (P = 0.012) and body weight (P = 0.012). HP-EVOO ingestion determined a reduction in serum level of aspartate aminotransferase (AST, P = 0.0056) and alanine aminotransferase (ALT, P = 0.024). Serum visfatin levels strongly decreased after HP-EVOO ingestion (P = 0.0021).

CONCLUSIONS:

Daily consumption of polyphenol-rich EVOO might improve metabolic control and circulating inflammatory adipokines profile in overweight T2D patients.

KEYWORDS:

Cytokines; HbA1c; Olive oil; Polyphenols; Type 2 diabetes mellitus; Visfatin

Read more: https://www.ncbi.nlm.nih.gov/pubmed/27344308

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