A new study suggests there could be a way to harness the brain’s capacity to self-repair and make new brain cells and perhaps preserve brain function in neurodegenerative diseases.

In Alzheimer’s, Parkinson’s, variant Creutzfeldt-Jakob and other brain-wasting prion diseases, cells in the brain gradually deteriorate, begin to function abnormally, and die. However, some parts of the brain have the capacity to self-repair and make new brain cells.

Writing in the journal Brain, study leader Dr. Diego Gomez-Nicola and colleagues from the Centre for Biological Sciences at the University of Southampton in the UK describe how previous studies have already revealed that even in neurodegenerative diseases there is evidence that the brain carries on attempting to repair itself.

One area of the brain that shows evidence of self-repair or neurogenesis is the dentate gyrus, which forms part of the hippocampus, which controls learning and memory.

Studying the brains of mice with a prion disease, the team found evidence of increased self-repair in the dentate gyrus that partially compensated for the loss of brain cells caused by the disease.

Their detailed investigation helped them identify how the new brain cell populations were generated over time, and how they integrated with existing brain circuits.

The team says they also found evidence to suggest increased self-repair in postmortem brain samples of patients who had variant Creutzfeldt-Jakob disease and Alzheimer’s disease when they died.

The authors conclude that the brain has some ability to orchestrate self-repair and suggest there is a time-limited window of opportunity for potential treatments to boost this mechanism and preserve brain function in patients with neurodegenerative diseases.

Source:  Medical News Today

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22 Ιουνίου, 2014