Clinical Efficacy and Immune Effects of Acupuncture in Patients With Comorbid Chronic Pain and Major Depression Disorder

Background: Depression and pain are highly comorbid and share biological mechanisms. Acupuncture is commonly used to manage both pain and depression, but the choice of acupoints for specific disorders differs. This study aimed to investigate whether specific acupuncture intervention on pain- and depression-acupoints would have specific efficacy and immune effects in patients with comorbid chronic pain and major depressive disorder (MDD). Methods: We performed a subject- and assessor-blinded, crossover, and randomized controlled clinical trial of depression- and pain-specific acupuncture intervention and measured clinical responses and proinflammatory cytokines in patients with comorbid chronic pain and MDD. Specific acupoints for pain and depression were used in random order with a washout interval. Outcome measures During the visits at weeks 0 (baseline), 2, 4, 6 (after the first 6-week intervention), 8 (before the start of the second 6-week intervention), 10, 12, and 14 (after the second 6-week intervention), trained research nurses assessed the patients for depressive symptoms, pain symptoms, and the quality of life by using the HAM-D (Hamilton, 1960), BDI-II (Beck et al., 1996), BPI, Neurotoxicity Rating Scale (NRS), Clinical Global Impression scale (CGI), and World Health Organization Quality of Life BREF (WHOQOL-BREF). The HAM-D and BDI-II are the most frequently used observer-rated and self-report scales of depression, respectively. The BPI rapidly assesses the severity of pain and its impact on functioning. The NRS is a reliable and valid self-report measure used in the evaluation of psychiatric and physical symptoms. The CGI are measures of symptom severity, treatment response and the efficacy of treatments. The WHOQOL-BREF contains four domains related to the quality of life: physical health, psychological, social relationships and environment. Blood sample and quantification of cytokines At weeks 0 (baseline), 6 (after the first 6-week intervention), 8