A Novel Way Out of the Dilemma in the Treatment of Breast Cancer: Rh2-Lipo
Introduction
Ginsenoside Rh2 nanoliposome formulation has been proved to effectively target and deliver drugs to the tumor site, with less side effects and higher treatment efficiency, holding great promise in the treatment of tumors including breast cancer.
Dilemma of traditional tumor therapies
The traditional tumor therapies (eg. surgery, radiation, and chemotherapy) carry the high risks of damaging normal tissues and incompletely eradicating the cancer. Strikingly, nanotechnology opens up novel opportunities for tumor treatment, which can enhance earlier diagnosis through in vitro assays, promote imaging capabilities for diagnosis and treatment monitoring, and improve therapeutic outcomes by refining targeting precision, augmenting localized drug efficacy as well as minimizing systemic toxicity.
Limitations of conventional liposome formulations
The conventional liposome formations encounter a lot of bottlenecks in improving the progress of tumor microenvironment, a vital complex ecosystem for cancer development and metastasis. In addition, these formulations face the trouble (eg. issues related to religion tradition and vegetarianism) brought by cholesterol, an ingredient of traditional liposomes. Moreover, there are disadvantages of complicated fabrication process, low targeting efficiency of ligand-modified liposomes as well as extended circulation time of liposomes caused by the utilization of polyethylene glycol.
Merits of PTX-Rh2-Lipo
PTX-Rh2-lipo, a potential nanomedicine, has an overtly smaller particle size and higher zeta potential when compared with PTX-C-Lipo. Both types of liposomes show analogous encapsulation and stabilization abilities, as manifested by similar polydispersity index, encapsulation efficiency, and loading efficiency.
Different from conventional wooden liposomes, PTX-Rh2-Lipo has the merits of enhanced uptake in tumor-associated fibroblasts L929 and 4T1 breast cancer cells, high targeting and penetration capacity, cytotoxicity against L929 fibroblasts, normalization of the vessel network, and depletion of stromal collagen.
Different from conventional wooden liposomes, PTX-Rh2-Lipo has the merits of enhanced uptake in tumor-associated fibroblasts L929 and 4T1 breast cancer cells, high targeting and penetration capacity, cytotoxicity against L929 fibroblasts, normalization of the vessel network, and depletion of stromal collagen.
Conclusion
Rh2-lipo cannot kill 4T1 breast cancer cells alone, despite of its stronger penetration ability in the tumors. Yet, it can act as a delivery vehicle for paclitaxel (PTX) to enhance its antitumor properties. Specifically, in this novel Rh2-Lipo-based nano-carrier PTX-Rh2-lipo, ginsenoside Rh2 can not only serve as a multifunctional membrane material to stabilize the structure and prolong the blood circulation of liposomes, but also works as an active ingredient to synergically enhance the efficacy of anti-cancer drugs by remodeling tumor-associated microenvironment and stimulating the immune system.
Reference
[1] Alrushaid N, Khan FA, Al-Suhaimi EA, et al. Nanotechnology in Cancer Diagnosis and Treatment. Pharmaceutics. 2023; 15(3):1025. doi: 10.3390/pharmaceutics15031025
[2] Hong C, Liang J, Xia J, et al. One Stone Four Birds: A Novel Liposomal Delivery System Multi-functionalized with Ginsenoside Rh2 for Tumor Targeting Therapy. Nanomicro Lett. 2020;12(1):129. doi:10.1007/s40820-020-00472-8
[3] Hong C, Wang A, Xia J, et al. Ginsenoside Rh2-Based Multifunctional Liposomes for Advanced Breast Cancer Therapy. Int J Nanomedicine. 2024;19:2879-2888. doi:10.2147/IJN.S437733
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