Tubulin-Based Nanotubes as Delivery Platform for Microtubule-Targeting Agents

Area of Science:

• Biochemistry
• Nanotechnology
• Oncology

Background:

• Microtubule-targeting agents (MTAs) are crucial in cancer therapy.
• Developing efficient delivery systems for MTAs remains a challenge.
• Tubulin-based nanotubes (TNTs) are explored as potential drug carriers.

Purpose of the Study:

• To investigate the use of TNTs for delivering MTAs in cancer treatment.
• To evaluate the impact of drug loading on TNT structure and function.
• To assess the synergistic and in vivo efficacy of drug-loaded TNTs.

Main Methods:

• Loading three distinct MTAs (docetaxel, laulimalide, MMAE) onto TNTs.
• Analyzing drug-induced structural changes in TNTs.
• Investigating cellular uptake via the endolysosomal pathway.
• Conducting in vitro synergistic and antiangiogenic assays.
• Performing in vivo tumor growth suppression studies.

Main Results:

• Drug loading induced structural modifications in TNTs, affecting stability and efficiency.
• Co-loaded TNTs demonstrated synergistic anticancer and antiangiogenic effects in vitro.
• TNTs loaded with MMAE significantly suppressed tumor growth in vivo compared to free MMAE.
• TNTs proved to be a versatile delivery platform for various MTAs.

Conclusions:

• TNTs can be engineered by their cargo, transforming into effective drug delivery vehicles.
• Drug-loaded TNTs exhibit enhanced therapeutic potential through synergistic action and improved in vivo efficacy.
• This study presents a novel strategy utilizing a drug's target protein as a carrier for enhanced cancer therapy.