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European Journal of Nutrition

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04-05-2023 | Colorectal Cancer | Review

Potential antitumor activity of garlic against colorectal cancer: focus on the molecular mechanisms of action

Authors: Kinga Oravetz, Adelina-Violeta Todea, Ovidiu Balacescu, Daniel Cruceriu, Elena Rakosy-Tican

Published in: European Journal of Nutrition | Issue 6/2023

Abstract

Purpose

The aim of this review is to highlight the potential of garlic phytoconstituents as antitumor agents in colorectal cancer management based on their molecular mechanisms of action, while asking if their consumption, as part of the human diet, might contribute to the prevention of colorectal cancer.

Methods

To gather information on appropriate in vitro, in vivo and human observational studies on this topic, the keywords “Allium sativum”, “garlic”, “colorectal cancer”, “antitumor effect”, “in vitro”, “in vivo”, “garlic consumption” and “colorectal cancer risk” were searched in different combinations in the international databases ScienceDirect, PubMed and Google Scholar. After duplicate and reviews removal, 61 research articles and meta-analyses published between 2000 and 2022 in peer-reviewed journals were found and included in this review.

Results

Garlic (Allium sativum) proves to be a rich source of compounds with antitumor potential. Garlic-derived extracts and several of its individual constituents, especially organosulfur compounds such as allicin, diallyl sulfide, diallyl disulfide, diallyl trisulfide, diallyl tetrasulfide, allylmethylsulfide, S-allylmercaptocysteine, Z-ajoene, thiacremonone and Se-methyl-L-selenocysteine were found to possess cytotoxic, cytostatic, antiangiogenic and antimetastatic activities in different in vitro and in vivo models of colorectal cancer. The molecular mechanisms for their antitumor effects are associated with the modulation of several well-known signaling pathways involved in cell cycle progression, especially G1-S and G2-M transitions, as well as both the intrinsic and extrinsic apoptotic pathways. However, even though in various animal models some of these compounds have chemopreventive effects, based on different human observational studies, a diet rich in garlic is not consistently associated with a lower risk of developing colorectal cancer.

Conclusion

Independent of the impact of garlic consumption on colorectal cancer initiation and promotion in humans, its constituents might be good candidates for future conventional and/or complementary therapies, based on their diverse mechanisms of action.

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Title: Potential antitumor activity of garlic against colorectal cancer: focus on the molecular mechanisms of action
Authors: Kinga Oravetz
Adelina-Violeta Todea
Ovidiu Balacescu
Daniel Cruceriu
Elena Rakosy-Tican
Publication date: 04-05-2023
Publisher: Springer Berlin Heidelberg
Keywords: Colorectal Cancer
Colorectal Cancer
Published in: European Journal of Nutrition / Issue 6/2023
Print ISSN: 1436-6207
Electronic ISSN: 1436-6215
DOI: https://doi.org/10.1007/s00394-023-03166-0

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