Bladder Cancer Treatment Enhanced by Chitosan Nanoparticles

Researchers at the Bydgoszcz University of Science and Technology in Poland have made a breakthrough in treating bladder cancer using chitosan nanoparticles as a drug delivery system. The study, funded by the Polish Ministry of Science and Education and the National Science Centre, utilized a 3D spheroid model of bladder cancer to investigate the efficacy of ciprofloxacin encapsulated in chitosan nanocapsules. The results showed improved stability and controlled drug release of the encapsulated ciprofloxacin, leading to enhanced cytotoxicity in 3D T24 bladder cancer spheroids.

Key Takeaways:

• The study used chitosan nanoparticles as a drug delivery system for ciprofloxacin to enhance treatment efficacy in bladder cancer.
• The encapsulation efficiency of ciprofloxacin was optimized by adjusting the mass ratio of chitosan to cross-linking tripolyphosphate (TPP) polyanion.
• The resulting chitosan nanocapsules loaded with ciprofloxacin demonstrated improved stability and controlled drug release compared to non-encapsulated ciprofloxacin.
• The study utilized a 3D spheroid model of bladder cancer, which better mimics the tumour microenvironment than 2D cultures, to evaluate the drug efficacy.
• The results showed that encapsulated ciprofloxacin exhibited enhanced cytotoxicity in 3D T24 bladder cancer spheroids, with significant effects observed at ciprofloxacin concentrations of 500 and 1000 mM after 48 and 72 h of exposure.
• The study suggested that chitosan nanocapsules can improve the delivery and cytotoxic profile of ciprofloxacin in vitro, indicating their potential for further development as carriers in localized bladder cancer treatment.
• The researchers used a 3D culturing method to evaluate the efficacy of the treatment, which provides a more accurate representation of the tumour microenvironment.
• The study highlighted the importance of using a 3D model to evaluate the efficacy of anticancer drugs, as it provides a more accurate representation of the tumour microenvironment.
• The researchers concluded that chitosan nanocapsules can improve the delivery and cytotoxic profile of ciprofloxacin in vitro, indicating their potential for further development as carriers in localized bladder cancer treatment.

Statistics:

• The study used 500 and 1000 mM concentrations of ciprofloxacin in the experiments.
• The results showed significant effects of ciprofloxacin concentrations of 500 and 1000 mM after 48 and 72 h of exposure in 3D T24 bladder cancer spheroids.
• The study utilized a 3D spheroid model of bladder cancer, which better mimics the tumour microenvironment than 2D cultures.
• The researchers used a total of 1000 mM of ciprofloxacin in the experiments.

Sources:

• "Investigation of Anti-Cancer Properties of Nano-Encapsulated Ciprofloxacin Using 3D Cancer Cell Spheroids as Tumour Models." International Journal of Molecular Sciences, vol. 26, no. 12, 2025, pp. 5530.
• Mdpi, St Alban-Anlage 66, Ch-4052 Basel, Switzerland.
• Karolina Matulewicz, Faculty of Medicine, Bydgoszcz University of Science and Technology, Aleje Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland.