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A Blood Test for Depression?

(Science Daily) Blood tests have been extremely important tools aiding doctors in making medical diagnoses and in guiding the treatment of many diseases. However, psychiatry is one area of medicine where there are few diagnostic blood tests…

Using [gene expression profiling, which measures the levels of RNA produced from DNA as an indication of the level of the "activity" of particular genes], Dutch researchers evaluated blood gene expression profiles in healthy individuals and patients diagnosed with major depressive disorder, or MDD. They identified a set of seven genes in whole blood that was able to distinguish un-medicated MDD patients from healthy controls.

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