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Melatonin, experimental basis for a possible application in breast cancer prevention and treatment
1Department of Physiology and Pharmacology, School of Medicine, University of Cantabria, Santander, Spain.
Abstract:
The role of the pineal as an oncostatic gland has been studied in animal models of tumorigenesis, especially on those concerning the mammary gland. The general conclusion is that experimental manipulations activating pineal gland, or the administration of melatonin, reduce the incidence and growth rate of chemically-induced murine mammary tumors, while pinealectomy or situations which implicate a reduction of melatonin production usually stimulate mammary carcinogenesis. The direct actions of melatonin on mammary tumors have been suggested because of its ability to inhibit, at physiological doses (1nM), the in vitro proliferation of MCF-7 human breast cancer cells. In this article we review the outstanding findings related to melatonin actions on mammary which, taken together, support a possible usefulness of this indoleamine in the prevention and treatment of mammary gland malignancy.
Insights
Melatonin, a pineal gland hormone, shows potential in preventing and treating mammary gland cancer. Studies indicate it reduces tumor incidence and growth in animal models, and inhibits human breast cancer cell proliferation.
Area of Science:
- Endocrinology
- Oncology
- Cancer Research
Background:
- The pineal gland's role in cancer, particularly mammary tumors, is under investigation.
- Melatonin, a key hormone produced by the pineal gland, has demonstrated oncostatic properties.
Purpose of the Study:
- To review findings on melatonin's effects on mammary gland malignancy.
- To explore the potential of melatonin in preventing and treating breast cancer.
Main Methods:
- Review of experimental studies involving animal models of mammary tumorigenesis.
- Analysis of in vitro studies on human breast cancer cell lines (MCF-7).
Main Results:
- Activating the pineal gland or administering melatonin reduced chemically-induced mammary tumor incidence and growth in mice.
- Pinealectomy or reduced melatonin levels stimulated mammary carcinogenesis.
- Melatonin inhibited in vitro proliferation of MCF-7 human breast cancer cells at physiological doses.
Conclusions:
- Experimental evidence supports melatonin's inhibitory effects on mammary tumors.
- Melatonin may be a valuable agent for the prevention and treatment of breast cancer.
