Scientists say that testing tears may be cheap, noninvasive, and reliable method for early diagnosis of Parkinson’s disease. This is because tears contain various proteins produced by the secretory cells of the lacrimal glands, which are stimulated by nerves.
A new study has shown that changing levels of proteins can accurately predict neurological disorder.
Because Parkinson’s disease affects the function of the nerves outside of the brain, scientists from the University of southern California in Los Angeles suggested that any change in nerve function could affect the levels of proteins in tears and, thus, may help identify individuals with a neurological disorder.
The researchers compared samples of tears in patients with Parkinson’s disease and in people without this disease. The results showed that the total protein level of alpha-synuclein was reduced in people with Parkinson’s disease, while the protein levels of oligomeric alpha-synuclein was increased in people with Parkinson’s disease compared to people without this disease.
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