A Family of Compounds with Anti-Aging Potential Reveals a Dark Side in Cancer Growth
A group of natural compounds known for their anti-aging properties has recently been found to have a dark side – they can actually accelerate the growth of cancer cells. This discovery, made by a team of researchers from the Tokyo University of Science in Japan, sheds new light on the relationship between polyamines and cancer progression, offering valuable insights for both cancer treatment research and anti-aging therapies.
Polyamines are essential molecules present in all living cells, including compounds like spermidine and putrescine. These compounds play a crucial role in regulating processes related to cell growth and protein synthesis. While previous studies have highlighted the benefits of spermidine in improving lifespan, enhancing health, and reducing age-related memory loss, recent research has also linked polyamines to cancer metastasis.
The study aimed to investigate how polyamines, particularly spermidine, influence the growth of cancer cells by examining their impact on cellular processes such as aerobic glycolysis. By using lab cultures of cervical cancer and breast cancer cells, the researchers explored the effects of polyamines on the production of two proteins – eIF5A1 and eIF5A2.
Although eIF5A1 and eIF5A2 share similar amino acid sequences, eIF5A1 is essential for healthy cells, while eIF5A2 is believed to play a role in cancer development. The researchers discovered that polyamines can modulate the levels of these proteins, thereby influencing cancer cell behavior.
Through drug interventions and genetic editing, the researchers demonstrated that altering the levels of polyamines and eIF5A2 can significantly impact cancer cell growth. The study revealed that polyamines promote aerobic glycolysis in cancer cells and increase the levels of eIF5A2 by suppressing the production of an RNA molecule called miR-6514-5p.
According to biochemist Kyohei Higashi, the study highlights the dual role of polyamines in normal tissues and cancer tissues. While polyamines activate eIF5A1 to support mitochondrial function in healthy cells, they promote the synthesis of eIF5A2 in cancer cells, facilitating tumor proliferation.
It is important to note that this research does not suggest that spermidine or polyamines cause cancer. Instead, it indicates that these compounds can be exploited by cancer cells to promote their survival and growth. By understanding the mechanisms involving eIF5A2 and miR-6514-5p, researchers may identify new targets for cancer treatment.
The findings of this study, published in the Journal of Biological Chemistry, offer valuable insights into the molecular pathways that drive cancer progression. Further research is needed to explore the potential of targeting eIF5A2 and related molecules as a strategy for disrupting cancer cell proliferation.
Overall, this research underscores the complex interplay between polyamines and cancer cells, providing a foundation for developing innovative approaches to cancer treatment.
