Osthole

What is Osthole

Osthole is a naturally occurring coumarin derivative that is contained in various medicinal plants, but above all in the seeds of Cnidium monnieri (Chinese cnidium, “She Chuang Zi”). Chemically, osthole belongs to the group of the prenylated coumarins and is characterized by a lipophilic structure that enables good cell permeability. In traditional Chinese medicine, preparations containing osthole have for centuries been credited with a multitude of applications – for example for the treatment of skin diseases, for the promotion of blood circulation and for the increase of vitality. Because of its broad pharmacological modes of action, osthole has in recent decades increasingly become the subject of scientific research. The focus here is in particular on anti-inflammatory, antimicrobial and neuroactive effects. Osthole occurs not only in Cnidium monnieri, but also in further plants such as Angelica pubescens, Peucedanum ostruthium (masterwort) or Imperata cylindrica. Its effect is not limited to a single organ system, but encompasses numerous physiological processes – from cell communication through vascular function to hormonal and neuronal mechanisms.

What health benefits does Osthole offer?

Osthole is being examined in research because of its versatile bioactivity. However, far more research is required, and some of the potential benefits identified so far are:

  • Inhibition of inflammation: Osthole inhibits various pro-inflammatory cytokines and signaling pathways such as NF-κB, which makes it interesting for inflammatory conditions (1,2,3).
  • Antispasmodic effect: In animal models, osthole has a relaxing effect on smooth muscle – for example in the gastrointestinal tract or in the airways (1,2).
  • Neuroprotective effects: Initial studies show that osthole can modulate neuronal activity, with potential benefit in neurodegenerative diseases (1,3).
  • Antimicrobial activity: Osthole shows an effect against various bacterial and fungal species, which supports its traditional use for skin problems such as eczema or itching (4,5).
  • Inhibition of carcinoma and tumor growth (preclinical): In cell culture and animal experiments, osthole showed inhibiting effects on the growth of certain tumor cells – above all through an influence on the cell cycle and on apoptosis (6,7).

How does Osthole work in the body?

Osthole develops its effect via several mechanisms. It interacts with various signaling pathways (e.g. MAPK, PI3K/Akt), influences the calcium balance in cells, acts as an antioxidant and modulates neurotransmitter systems such as the GABA system. Through its lipophilic structure, osthole can easily penetrate cell membranes and thus act directly on intracellular target structures (1–7).

Are there risks or side effects?

  • Photosensitization: As with many coumarins, osthole too can increase the light sensitivity of the skin under UV exposure – in particular with external application.
  • Little research: Because of the insufficient data situation, no conclusive statement can be made about the effect. Neither with regard to pregnancy or breastfeeding nor with regard to long-term use.

Conclusion 

Osthole is a versatile natural substance with a long tradition of use in Asian herbal medicine. Modern research points to anti-inflammatory, antimicrobial and neuroactive effects – however, considerably more studies are generally necessary in order to be able to make conclusive statements about the effect.

References:

  1. Li, R., Dang, S., Yao, M., Zhao, C., Zhang, W., Cui, J., Wang, J., & Wen, A. (2020). Osthole alleviates neuropathic pain in mice by inhibiting the P2Y1-receptor-dependent JNK signaling pathway. Aging, 12(9), 7945–7962. https://doi.org/10.18632/aging.103114
  2. Singh, G., Bhatti, R., Mannan, R., Singh, D., Kesavan, A., & Singh, P. (2019). Osthole ameliorates neurogenic and inflammatory hyperalgesia by modulation of iNOS, COX-2, and inflammatory cytokines in mice. Inflammopharmacology, 27(5), 949–960. https://doi.org/10.1007/s10787-018-0486-9
  3. Wu, H. X., Wang, Y. M., Xu, H., Wei, M., He, Q. L., Li, M. N., Sun, L. B., & Cao, M. H. (2017). Osthole, a Coumadin Analog from Cnidium monnieri (L.) Cusson, Ameliorates Nucleus Pulposus-Induced Radicular Inflammatory Pain by Inhibiting the Activation of Extracellular Signal-Regulated Kinase in Rats. Pharmacology, 100(1-2), 74–82. https://doi.org/10.1159/000475599
  4. Kong, Y., Yan, H., Hu, J., Dang, Y., Han, Z., Tian, B., & Wang, P. (2024). [Article title]. Journal of Agricultural and Food Chemistry, 72(19), 10853–10861. https://doi.org/10.1021/acs.jafc.3c07931
  5. Yang, R., Xue, Z., Li, X., Xu, T., Zhong, Y., Hu, S., Qin, S., & Guo, Y. (2024). Novel natural osthole-inspired amphiphiles as membrane targeting antibacterials against methicillin-resistant Staphylococcus aureus (MRSA). European journal of medicinal chemistry, 271, 116449. https://doi.org/10.1016/j.ejmech.2024.116449
  6. Yang, S., Dai, W., Wang, J., Zhang, X., Zheng, Y., Bi, S., Pang, L., Ren, T., Yang, Y., Sun, Y., Zheng, Z., Wu, S., & Kong, J. (2022). Osthole: An up-to-date review of its anticancer potential and mechanisms of action. Frontiers in pharmacology, 13, 945627. https://doi.org/10.3389/fphar.2022.945627
  7. Wang, L., Yang, L., Lu, Y., Chen, Y., Liu, T., Peng, Y., Zhou, Y., Cao, Y., Bi, Z., Liu, T., Liu, Z., & Shan, H. (2016). Osthole Induces Cell Cycle Arrest and Inhibits Migration and Invasion via PTEN/Akt Pathways in Osteosarcoma. Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology, 38(6), 2173–2182. https://doi.org/10.1159/000445573
  8. Tong, M., Liu, M., Chen, L., Lin, Y.-h. and Zheng, Q. (2025), Osthole Induces Hepatic Stellate Cell Ferroptosis to Alleviate Liver Fibrosis by Inhibiting the Y-Box Binding Protein 1-Wnt/β-Catenin Axis Through Downregulating Myocyte Enhancer Factor 2A. Chem Biol Drug Des, 105: e70113. https://doi.org/10.1111/cbdd.70113