Reversing Paralysis? Stem Cell Therapy in Japan Achieves Historic Success

By: | April 2nd, 2025

Image Courtesy: DALL·E

A Major Breakthrough in Regenerative Medicine

In a remarkable scientific milestone, researchers at Keio University in Tokyo have successfully enabled a paralyzed man to stand again following an innovative stem cell treatment. This breakthrough marks a significant step forward in regenerative medicine, bringing new hope to those suffering from spinal cord injuries.

How the Treatment Works

To achieve this, the research team, led by Professor Hideyuki Okano, conducted a clinical trial involving four participants who had completely lost motor function due to spinal cord injuries. Specifically, the team used induced pluripotent stem (iPS) cells, which are adult cells reprogrammed into an embryonic-like state. These cells were then developed into neural precursor cells and carefully injected into the injured spinal cords of the patients.

Furthermore, each patient received approximately two million stem cells, with the goal of helping regenerate damaged nerve connections and restore movement.

The Treatment Process

The first surgery took place in December 2021, followed by additional procedures in 2022 and 2023. Importantly, the patients received the treatment within two to four weeks of their spinal injuries, a critical window for potential recovery.

Additionally, to prevent rejection of the transplanted cells, doctors administered immunosuppressive drugs for six months after surgery. This step was crucial in ensuring that the body accepted the new cells without complications.

Promising Results and Patient Progress

So far, the outcomes have been highly encouraging.

  • Most notably, one patient has regained the ability to stand independently.

  • Meanwhile, two others have shown noticeable improvements in motor function.

  • On the other hand, the fourth patient has not yet demonstrated significant changes.

More importantly, the treatment has been confirmed as safe, with no adverse effects reported so far.

A New Hope for Paralysis Patients

In summary, this breakthrough represents a major advancement in regenerative medicine. Although more research is needed, this cutting-edge treatment could one day become a viable solution for restoring mobility in paralysis patients. Ultimately, it offers renewed hope to millions worldwide who are waiting for a cure.

Nidhi Goyal

Nidhi is a gold medalist Post Graduate in Atmospheric and Oceanic Sciences.

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