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  • Dual role of heme iron in cancer; promotor of carcinogenesis and an inducer of tumour suppression

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    Dissabandara483390-Accepted.pdf (410.7Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Gamage, Sujani MK
    Lee, Katherine TW
    Dissabandara, D Lakal O
    Lam, Alfred King-Yin
    Gopalan, Vinod
    Griffith University Author(s)
    Dissabandara, Dissa L.
    Gopalan, Vinod
    Lam, Alfred K.
    Year published
    2021
    Metadata
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    Abstract
    PURPOSE: Heme is a crucial compound for cell survival but is also equipped with the potential to be toxic and carcinogenic to cells. However, with the recent advancement of knowledge regarding ferroptosis, the iron mediated cell death, heme can be postulated to induce tumour suppression through ferroptosis. This review summarizes the literature on the carcinogenic and anticarcinogenic properties of heme with specific emphasis on the alterations observed on heme synthesis, metabolism and transport in tumour cells. METHODS: Literature search was performed in PubMed data base using the MeSH terms 'heme iron or heme', 'cancer ...
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    PURPOSE: Heme is a crucial compound for cell survival but is also equipped with the potential to be toxic and carcinogenic to cells. However, with the recent advancement of knowledge regarding ferroptosis, the iron mediated cell death, heme can be postulated to induce tumour suppression through ferroptosis. This review summarizes the literature on the carcinogenic and anticarcinogenic properties of heme with specific emphasis on the alterations observed on heme synthesis, metabolism and transport in tumour cells. METHODS: Literature search was performed in PubMed data base using the MeSH terms 'heme iron or heme', 'cancer or carcinogenesis' and 'tumour suppression' or 'anticarcinogenic properties. Out of 189 results, 166 were relevant to the current review. RESULTS: Heme supports carcinogenesis via modulation of immune cell function, promoting inflammation and gut dysbiosis, impeding tumour suppressive potential of P53 gene, promoting cellular cytotoxicity and reactive oxygen species generation and modulating Nfr2 /HO-1 axis. The carcinogenic and anticarcinogenic properties of heme are both dose and oxygen concentration dependant. At low doses, heme is harmless and even helpful in maintaining the much-needed redox balance within the cell. However, when heme exceeds physiological concentrations, it could initiate and propagate carcinogenesis, due to its ability to produce reactive oxygen species (ROS). The same phenomenon of heme mediated ROS generation could be manipulated to initiate tumour suppression via ferroptosis, but the therapeutic doses are yet to be determined. CONCLUSION: Heme iron possesses powerful carcinogenic and anticarcinogenic properties which are dosage and oxygen availability dependant.
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    Journal Title
    Experimental and Molecular Pathology
    Volume
    120
    DOI
    https://doi.org/10.1016/j.yexmp.2021.104642
    Copyright Statement
    © 2021 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Clinical sciences
    Oncology and carcinogenesis
    Ferroptosis
    Heme iron
    Immune modulation
    Inflammation
    Publication URI
    http://hdl.handle.net/10072/404105
    Collection
    • Journal articles

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