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Tiny RNA molecules fine-tune the brain's synapses

velopment in response to environmental stimuli. "A single neuron can form a thousand synapses," says Greenberg, also a professor of neurology and neuroscience at Harvard Medical School. "If you could selectively control what's happening at one synapse without affecting another, you greatly increase the information storage and computational capacity of the brain."

Greenberg also speculates that miR-134 may be relevant to disorders such as mental retardation and autism. He notes that loss of Limk1 due to a chromosomal deletion is associated with Williams syndrome, and that the BDNF pathway that activates Limk1 includes proteins that are disabled in tuberous sclerosis and Fragile X syndrome. All three genetic disorders can cause cognitive impairment and autistic-like behaviors.


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Source:Children's Hospital Boston


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