Discovery of New Natural Compounds with Cancer-Fighting Potential

Jim Crocker
18th July, 2024

Discovery of New Natural Compounds with Cancer-Fighting Potential

The review found that a variety of medicinal and ornamental plants, including the Lily of the valley (Convallaria majalis, pictured), are a rich source of novel steroidal glycosides that exhibit potent and selective cytotoxic activity against various human cancer cells.

Photo adapted from: Neal Kelso / CC BY (Source)

Key Findings

  • Researchers from Tokyo University of Pharmacy and Life Sciences studied steroidal glycosides from nine different plants for their anti-cancer potential
  • They found that certain steroidal glycosides selectively killed cancer cells while sparing normal cells
  • Some of these compounds showed enhanced anti-cancer effects when used together, indicating potential for combination therapies
Recent research conducted by Tokyo University of Pharmacy and Life Sciences has shed light on the potential of steroidal glycosides derived from higher plants as anti-cancer agents[1]. This study specifically focused on nine different plants, including Convallaria majalis, Agave utahensis, Adonis amurensis, Adonis aestivalis, Bessera elegans, Fritillaria meleagris, Digitalis purpurea, Yucca glauca, and Lilium pumilum. The researchers aimed to isolate and characterize novel steroidal glycosides and evaluate their cytotoxicity against various tumor cells. Steroidal glycosides are compounds that consist of a steroid backbone linked to sugar molecules. These compounds have garnered interest due to their structural diversity and biological activities, including potential anti-cancer properties[2]. Previous studies have shown that saponins, a subset of steroidal glycosides, can induce cell-cycle arrest, apoptosis, and autophagy in cancer cells[2]. However, challenges such as toxicity and drug-likeness properties have hindered their clinical application. In the current study, the researchers employed techniques such as spectroscopic data analysis and chemical transformations to determine the structures of the new steroidal glycosides. They also used high-performance liquid chromatography (HPLC) with an optical rotation detector to identify the monosaccharides and their absolute configurations. The cytotoxicity of the isolated steroidal glycosides was tested against a range of tumor cells, including A549 (lung cancer), ACHN (renal cancer), HepG-2 (liver cancer), HL-60 (leukemia), HSC-2, HSC-3, HSC-4 (oral squamous cell carcinoma), HSG (salivary gland cancer), and SBC-3 (small cell lung cancer) cells. Normal cells such as Fa2 N-4 (fibroblasts), HK-2 (kidney cells), and TIG-3 (lung fibroblasts) were also included to assess selectivity and potential toxicity. The findings revealed that certain steroidal glycosides exhibited selective cytotoxicity towards cancer cells while sparing normal cells. This selective cytotoxicity is crucial for the development of anti-cancer agents, as it minimizes damage to healthy tissues. Moreover, some of these compounds demonstrated synergistic effects, enhancing their anti-cancer potential. The study's results align with earlier research on cardiac glycosides, which are known for their ability to induce apoptosis and autophagic cell death in various cancer cell lines[3]. For instance, strophanthidin, a naturally occurring cardiac glycoside, has shown dose-dependent cytotoxic effects and the ability to arrest the cell cycle in cancer cells[3]. The current study expands on these findings by identifying additional steroidal glycosides with similar properties. Furthermore, the study highlights the untapped potential of plants from the Lilium genus, which have been traditionally used as food and medicine. Previous research has indicated that the majority of the 110 accepted species in this genus have not been thoroughly investigated for their chemical and biological activities[4]. The current study's identification of novel steroidal glycosides from Lilium pumilum underscores the importance of exploring this genus further for potential therapeutic agents. In summary, the systematic phytochemical investigation conducted by Tokyo University of Pharmacy and Life Sciences has identified 139 new steroidal glycosides from higher plants, many of which exhibit promising anti-cancer properties. These findings contribute to the growing body of evidence supporting the potential of natural products as sources of novel anti-cancer agents. Future research should focus on optimizing these compounds for clinical use, addressing challenges such as toxicity and drug-likeness properties, and exploring combination therapies and advanced drug delivery systems to enhance their efficacy[2].

MedicineHealthBiochem

References

Main Study

1) Search for new steroidal glycosides with anti-cancer potential from natural resources.

Published 17th July, 2024

https://doi.org/10.1007/s11418-024-01830-1

Related Studies

2) Saponins in Cancer Treatment: Current Progress and Future Prospects.

https://doi.org/10.3390/pathophysiology28020017

3) Strophanthidin Attenuates MAPK, PI3K/AKT/mTOR, and Wnt/β-Catenin Signaling Pathways in Human Cancers.

https://doi.org/10.3389/fonc.2019.01469

4) Chemistry and biological activity of steroidal glycosides from the Lilium genus.

https://doi.org/10.1039/c4np00063c


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