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Over the last 25 years or so, there have been at least a dozen announcements of the latest miracle cure that works to repair spinal cord injury in mice. To date, none of them have translated to human efficacy. It's almost a meme at this point - like net-positive fusion being only ten years away. There appears to be a fundamental difference between mice and human nervous system injury repair modes that leads to early confidence. The spinal cords in mice essentially repair themselves if you so much as ask nicely.

The real litmus test for claims of effective spinal cord repair treatments is primate testing. If you see mice and not chimps, the treatment is probably a dead end.

Not to say this research doesn't have value - I fully support continued and rigorous research in this area - but hyperbolic claims like: "it works in mice, so it should also work in humans" aren't helping the cause.