Simple Blood Test May Unlock New Frontier in Treating Depression; C-Reactive Protein Level Test Can Indicate Effective Antidepressant Medication for Individual Patient; “Can Immediately Be Used in Clinical Practice”

For the first time, doctors can determine which medication is more likely to help a patient overcome depression, according to research that pushes the medical field beyond what has essentially been a guessing game of prescribing antidepressants. A blood test that measures a certain type of protein level (level of C-reactive protein) provides an immediate tool for physicians who, until now, have relied heavily on patient questionnaires to choose a treatment, said Dr. Madhukar Trivedi, who led the research at the University of Texas (UT) Southwestern Medical Center's Center for Depression Research and Clinical Care. "Currently, our selection of depression medications is not any more superior than flipping a coin, and yet that is what we do. Now we have a biological explanation to guide treatment of depression," said Dr. Trivedi, Director of the Center for Depression Research and Clinical Care, a cornerstone of UT Southwestern's Peter O'Donnell Jr. Brain Institute. The study demonstrated that measuring a patient's C-reactive protein (CRP) levels through a simple finger-prick blood test can help doctors prescribe a medication that is more likely to work. Utilizing this test in clinical visits could lead to a significant boost in the success rate of depressed patients who commonly struggle to find effective treatments. A major national study (STAR*D) Dr. Trivedi led more than a decade ago gives insight into the prevalence of the problem: Up to a third of depressed patients don't improve during their first medication, and about 40 percent of people who start taking antidepressants stop taking them within three months. "This outcome happens because they give up," said Dr. Trivedi, whose previous national study established widely accepted treatment guidelines for depressed patients.
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