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An enhanced chemopreventive effect of methyl donor S-adenosylmethionine in combination with 25-hydroxyvitamin D in blocking mammary tumor growth and metastasis. | LitMetric

AI Article Synopsis

  • Therapeutic targeting of metastatic breast cancer is complex due to the diversity of tumor cells and their ability to utilize various growth pathways, making single-agent treatments often ineffective.
  • A study evaluated a combination treatment using two nutraceuticals, S-adenosylmethionine (SAM) and Vitamin D (25-hydroxyvitamin D), which showed enhanced anti-cancer effects compared to their individual use in both lab tests and animal models.
  • The combination treatment not only inhibited cancer cell growth and spread but also positively influenced gene expression linked to immune responses, suggesting it could be a safe and effective strategy for managing breast cancer-related complications.

Article Abstract

Therapeutic targeting of metastatic breast cancer still remains a challenge as the tumor cells are highly heterogenous and exploit multiple pathways for their growth and metastatic spread that cannot always be targeted by a single-agent monotherapy regimen. Therefore, a rational approach through simultaneous targeting of several pathways may provide a better anti-cancer therapeutic effect. We tested this hypothesis using a combination of two nutraceutical agents S-adenosylmethionine (SAM) and Vitamin D (Vit. D) prohormone [25-hydroxyvitamin D; '25(OH)D'] that are individually known to exert distinct changes in the expression of genes involved in tumor growth and metastasis. Our results show that both SAM and 25(OH)D monotherapy significantly reduced proliferation and clonogenic survival of a panel of breast cancer cell lines in vitro and inhibited tumor growth, lung metastasis, and breast tumor cell colonization to the skeleton in vivo. However, these effects were significantly more pronounced in the combination setting. RNA-Sequencing revealed that the transcriptomic footprint on key cancer-related signaling pathways is broader in the combination setting than any of the monotherapies. Furthermore, comparison of the differentially expressed genes from our transcriptome analyses with publicly available cancer-related dataset demonstrated that the combination treatment upregulates genes from immune-related pathways that are otherwise downregulated in bone metastasis in vivo. Since SAM and Vit. D are both approved nutraceuticals with known safety profiles, this combination treatment may serve as a novel strategy to reduce breast cancer-associated morbidity and mortality.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7376160PMC
http://dx.doi.org/10.1038/s41413-020-0103-6DOI Listing

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