Letters To The Editor Open Access
Copyright ©The Author(s) 2017. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Dec 21, 2017; 23(47): 8437-8438
Published online Dec 21, 2017. doi: 10.3748/wjg.v23.i47.8437
Silymarin: An option to treat non-alcoholic fatty liver disease
Carmela Colica, Luigi Boccuto, Ludovico Abenavoli
Carmela Colica, CNR, IBFM UOS of Germaneto, University “Magna Graecia”, Catanzaro 88100, Italy
Luigi Boccuto, Research Department, Greenwood Genetic Center, School of Health Research, Clemson University, Greenwood 29646, United States
Ludovico Abenavoli, Department of Health Sciences, University Magna Græcia, Campus Germaneto, Viale Europa, Catanzaro 88100, Italy
ORCID number: Carmela Colica (0000-0001-6424-1223); Luigi Boccuto (0000-0003-2017-4270); Ludovico Abenavoli (0000-0002-5922-1524).
Author contributions: Colica C and Abenavoli L performed research of literature data and wrote the paper; Boccuto L revised the paper.
Conflict-of-interest statement: Authors declares no conflict of interest related to this publication.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Ludovico Abenavoli MD, PhD, Associate Professor, Department of Health Sciences, University Magna Græcia, Campus Germaneto, Viale Europa - Germaneto, Catanzaro 88100, Italy. l.abenavoli@unicz.it
Telephone: +39-961-3697113 Fax: +39-961-754220
Received: November 8, 2017
Peer-review started: November 9, 2017
First decision: November 21, 2017
Revised: November 27, 2017
Accepted: December 4, 2017
Article in press: December 4, 2017
Published online: December 21, 2017

Abstract

We have read with a great interest the review published by Singh et al, on the treatment options in alcoholic and non-alcoholic fatty liver disease, including various new targeted therapies that are currently under investigation. Recently, we described the health effects of the Mediterranean diet associated to an antioxidant complex rich in silymarin, to improve in overweight patients anthropometric parameters, glucose and lipid metabolism and intra-hepatic fat accumulation.

Key Words: Mediterranean diet, Antioxidant, Silymarin, Non-alcoholic fatty liver disease

Core tip: Supplementation of silymarin in association with an hypocaloric diet and physical activity, can be a correct approach to treat patients with non-alcoholic fatty liver disease in clinical practice.



TO THE EDITOR

We read with great interest the recent review by Singh et al[1] on the treatment options in alcoholic and non-alcoholic fatty liver disease (NAFLD), including various new targeted therapies that are currently under investigation. In the last decades the diagnosis of NAFLD was increasingly evoked in clinical practice, with a worldwide spread of NAFLD, with an estimated prevalence between 25%-30% of general population, not only in Western world but also in urban area of developing Countries[2]. NAFLD is an umbrella term that includes different clinical pictures ranged from simple fat accumulation to steato-hepatitis, fibrosis, cirrhosis and its complications. Central obesity, dyslipidemia, insulin resistance, and diabetes in a context of metabolic syndrome are the risk factors largely associated to the development and progression of NAFLD[3]. Recently, studies on the mechanisms involved in the pathogenesis of NAFLD, highlight the role of genetic polymorphisms enhancing oxidative stress, pro-inflammatory cytokines production and disequilibrium in the glucose and lipid metabolism[4]. The standard of care to treat NAFLD, described by international guidelines, is focused on lifestyle modifications and in particular on starting a healthy diet and increasing physical exercise. However, no drugs are currently approved to treat NAFLD and its secondary complications by regulatory agencies[5]. Reactive oxygen species production, including superoxide radical, hydroxyl radical, hydrogen peroxide, and lipid peroxide radicals, are involved in the pathogenesis and progression of NAFLD, in a multi-step process[6]. Silybum marianum, commonly known as Milk Thistle (MT), family of Asteraceae/Compositae, has been used since the time of ancient physicians, to treat liver diseases[7]. The active complex of MT is a lipophilic extract from the seeds of the plant and is composed of four isomer flavonolignans, collectively known as silymarin. Several pre-clinical and clinical studies have been carried out on silymarin and silibinin, its predominant and most active component. It has been described that silymarin possesses anti-oxidant, anti-inflammatory, and anti-fibrotic properties. Our study group have been reported in a randomized study, the health effects of a hypocaloric Mediterranean diet in association with an antioxidant formulation with silymarin, on liver damage, glucose metabolism and anthropometric parameters in NAFLD overweight patients[8]. Data on the effects of silymarin in patients with NAFLD are limited. However, some studies showed that treatment with silymarin has been associated with an improvement of the oxidative profile, due to the ability of silymarin to inhibit the production of pro-inflammatory cytokines[9]. In addition, our data can be explained by the effectiveness of the diet associated to silymarin to reduce the extent of fat infiltration in the hepatocytes and to modulate the mitochondrial function.

In accordance with the paper by Singh et al[1], we conclude that new therapeutic targets are now under investigation for NAFLD. In this context, on the basis of our experience we support the role of silymarin, in association with lifestyle changes, to treat NAFLD patients, considering that it offers similar effects than some of the drugs listed by Singh et al[1] in terms of anti-oxidant (e.g., NOX-1/4 inhibitors), anti-fibrotic (e.g., galectin-3 antagonists, simtuzumab) and anti-inflammatory (e.g., sirtuins) properties, but with considerably lower side effects.

Footnotes

Manuscript source: Unsolicited manuscript

Specialty type: Gastroenterology and hepatology

Country of origin: Italy

Peer-review report classification

Grade A (Excellent): A

Grade B (Very good): 0

Grade C (Good): 0

Grade D (Fair): 0

Grade E (Poor): 0

P- Reviewer: Hamaguchi M S- Editor: Chen K L- Editor: A E- Editor: Huang Y

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