We can hack our immune cells to fight cancer | Elizabeth Wayne

TL;DR

In this content, the speaker discusses the limitations of current cancer drug delivery methods and proposes the use of immune cells as a means to deliver drugs more effectively.

Transcript

After decades of research and billions of dollars spent in clinical trials, we still have a problem with cancer drug delivery. We still give patients chemotherapy, which is so non-specific that even though it kills the cancer cells, it kind of kills the rest of your body, too. And yes, we have developed more selective drugs, but it's still a challe... Read More

Key Insights

• 🧪 Cancer drug delivery remains a challenge, with chemotherapy being non-specific and causing harm to healthy cells. Selective drugs struggle to reach tumors and end up accumulating in other organs or being wasted through urine.
• 🧠 Immune cells could be a solution for better drug delivery, as they naturally travel throughout the body, patrolling for disease. Adding drugs as "extra passengers" to immune cells could improve targeted treatment.
• 🩹 Biomedical engineers have developed a nanoparticle made of lipids, with molecules called e-selectin and trail, which bind the nanoparticle to immune cells. This combination acts as a "mean killing machine on wheels" by targeting and killing cancer cells.
• 🔬 In an experiment with mice, the nanoparticle-bound immune cells successfully killed over 75% of injected cancer cells, compared to only around 25% in the control group. This significantly reduces the spread of cancer to other parts of the body.
• 💡 This innovative drug delivery method represents a paradigm shift in the field, moving from simply injecting drugs and hoping they reach the right places, to using immune cells as specialized "delivery drivers" in the body.
• 🌍 While this study focused on cancer, the potential of using immune cells for drug delivery extends to any disease. For example, immune cells could deliver wound-healing agents after spinal cord injuries or drugs to treat neurodegenerative conditions like Parkinson's or Alzheimer's disease.
• 🏆 The success of this research is not only significant for the field of drug delivery but also highlights the importance of collaboration between scientists, patients, and the broader science community.
• 🌟 The promising results of this study offer hope and opportunities for improving targeted drug delivery, paving the way for more effective treatments across various diseases.

Questions & Answers

Q: Why is chemotherapy problematic in cancer treatment?

Chemotherapy is non-specific and not only kills cancer cells but also harms healthy cells in the body, leading to various side effects.

Q: What challenges exist in delivering selective drugs to tumors?

While more selective drugs have been developed, getting them to accumulate in tumors without affecting other organs or being wasted through urine remains a challenge.

Q: How do biomedical engineers propose improving drug delivery?

Biomedical engineers propose using immune cells as vehicles to deliver drugs to sites of injury or disease in the body, utilizing nature's own transportation system.

Q: What approach did the speaker take to target cancer spread?

The speaker used nanoparticles made of lipids and added two molecules called e-selectin and trail. This combination created a powerful targeted therapy that killed cancer cells while sparing normal cells.

Q: What were the results of the experiment in mice using the nanoparticle-immune cell delivery system?

After just two hours of treatment, the nanoparticle-immune cell delivery system led to over 75 percent of the initially injected cancer cells being dead or dying. This suggests a significant reduction in the potential spread of cancer to other parts of the body.

Q: Can the sticky nanoparticle balls attached to immune cells effectively prevent cancer spread?

Yes, in addition to the fast-acting results observed, further experiments in animal models demonstrated smaller primary tumors, fewer circulating cells, and little to no tumor burden in distant organs. These findings indicate that the nanoparticle-immune cell system can indeed prevent the spread of cancer.

Q: How could immune cell drug delivery be applied to other diseases?

The potential of using immune cells as delivery drivers extends beyond cancer. It could be utilized to deliver wound-healing agents after spinal cord injuries or to transport drugs across the blood-brain barrier to treat diseases like Parkinson's or Alzheimer's. The possibilities for using immune cells in drug delivery are vast and diverse.

Summary & Key Takeaways

• The current problem with cancer drug delivery is that chemotherapy is non-specific and kills healthy cells as well as cancer cells.

• Biomedical engineers propose using immune cells as a delivery system for drugs, as they already travel to sites of injury or disease in the body.

• An experiment using immune cells combined with nanoparticles showed promising results, with over 75% of cancer cells being killed or dying after just two hours of treatment.