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Again, I usually don't get excited about "rat studies" where the scientist in question says "lots of potential here, but more research needs to be done." However, I think this one may have a little more to it. In Australia, it seems scientists have taken stem cells from
human noses and implanted them into rats and it has
helped with the rats' Parkinson's.
Now, I read that article and I thought "Hey! Dr. Lima in Portugal has had remarkable success treating spinal cord injuries in humans using the same repair stem cells- from the nose," so I spoke with Dr. Lima and I'll try to summarize what he explained:
The nose seems to be the only (or the best) place outside of the brain to get stem cells that can become neurons. Neurons are used to transmit signals to, through, and from the brain. Most neurological diseases have neuron problems-- neurons are the transmitters of signals, but if they are deficient, the signal gets choppy. For example- In Parkinson's, people seem to shake when what is really happening is that the person's brain tells the arm to move, but the signals are broken- so the arm moves choppy. Similar to a cellphone, when your voice gets choppy or breaks up. So when Dr. Lima implants the nose stem cells into the break point of a spinal cord, the repair stem cells stay there and grow until eventually they are strong enough to transmit data to and from the brain, and then the stem cells replicate more and more and until the spinal cord injured patient is walking again. Any scientist or layman who wants to explain more clearly, please feel free to leave a comment- DM.