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Endocrine factors in human carcinogenesis.

B Armstrong

    IARC Scientific Publications
    |January 1, 1982
    PubMed
    Summary

    Endogenous hormones influence cancer development by affecting carcinogen metabolism, tissue susceptibility, and cell proliferation, rather than directly initiating cancer. Oestrogens are strongly linked to breast and endometrial cancers.

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    Area of Science:

    • Endocrinology
    • Oncology
    • Carcinogenesis

    Background:

    • Endogenous hormones play a complex role in cancer development, not typically as direct initiators.
    • Hormones can influence carcinogenesis through various mechanisms including carcinogen metabolism and tissue susceptibility.
    • Evidence links endogenous hormones to numerous cancer types, with oestrogens being particularly implicated.

    Purpose of the Study:

    • To elucidate the multifaceted roles of endogenous hormones in the process of carcinogenesis.
    • To review the evidence supporting hormonal involvement in various human cancers.
    • To explore the mechanisms by which hormones may influence cancer initiation and promotion.

    Main Methods:

    • Review of existing scientific literature on hormone function and cancer.
    • Analysis of epidemiological data linking hormone levels to cancer incidence.
    • Examination of experimental studies on hormone effects in carcinogenesis models.

    Main Results:

    • Endogenous hormones are implicated in the development of cancers affecting multiple organs, including breast, endometrium, prostate, and thyroid.
    • Oestrogens show a causal association with breast and endometrial cancers.
    • Hormone-induced cell proliferation is a key mechanism, potentially affecting both initiation susceptibility and promotion of initiated cells.

    Conclusions:

    • Endogenous hormones are significant modulators of cancer development, acting through indirect mechanisms.
    • Understanding hormonal influences is crucial for cancer prevention and treatment strategies.
    • Environmental factors interacting with hormonal pathways, such as diet, can impact cancer risk.

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