Repairing the brain after an injury can be crucial. So how do we do it?

Robert Krencik, associate professor in the department of neurosurgery and center for neuroregeneration at the Houston Methodist Research Institute, thinks small.

Dr. Krencik received his PhD in neuroscience at the University of Wisconsin-Madison and conducted research as a postdoctoral fellow at the University of California-San Francisco. At Houston Methodist, his research focuses on understanding the functional relationship of human astrocytes and neural networks in normal and injured states. His laboratory employs novel human pluripotent stem cell-based technologies to answer vital biological questions and to accelerate progress in promoting neuroregeneration in the human brain.

The adult human brain has a very limited ability to repair itself after injury and disease, including neurodegeneration. One promising therapeutic strategy to help recovery is to target broad underlying issues—like neuroinflammation. Inflammation of the brain can worsen symptoms and accelerate disease progression.

To address this, our team—together with Rice University—developed a new system to deliver anti-inflammatories directly to the brain.

The system we created is called AstroCapsules. These are tiny hydrogel spherical capsules, about the size of a grain of sand, that contain human astrocytes inside of them. Astrocytes are star-shaped support cells that help maintain healthy function of the nervous system, and we can produce these from human pluripotent stem cells in the laboratory.

In this study, we bioengineered the astrocytes to release an anti-inflammatory protein, interleukin-1 receptor antagonist. Our idea was that, if AstroCapsules were implanted into a specific region of the brain, the cells could help block damaging inflammatory signals in the microenvironment.

The purpose of the hydrogel is to act as a protective shell, allowing the astrocytes to do their job without being attacked by the immune system and not allowing them to migrate away from the target site.

We tested this approach by combining AstroCapsules with experimental models of the human brain in the lab, known as brain organoids, and by implantation directly into the mouse brain using neurosurgical procedures.

This technology addresses several major challenges in cell-based therapy. It’s stable, localized, and avoids immune rejection. The most exciting part is how it combines neuroscience and bioengineering to create smart materials that can interact with the brain in a controlled and targeted way.

This technology is in early stages, but AstroCapsules could become a more precise and long-lasting treatment for inflammation in neurodegenerative diseases, such as Parkinson’s disease and Alzheimer’s disease.

Read More:[Science Direct] - Delivery of cytokines via encapsulated human astrocytes for neural immunomodulation

[Houston Methodist NewsRoom] - Tiny treatment system helps fight back against neuroinflammation in the brain

This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit academicminute.substack.com

Robert Krencik, Houston Methodist Research Institute - Tiny Capsules, Big Hope: A New Tool to Repair the Brain From Within

The Academic Minute

Robert Krencik, Houston Methodist Research Institute - Tiny Capsules, Big Hope: A New Tool to Repair the Brain From Within