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The effects of mind-body therapies on the immune system

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The effects of mind-body therapies on the immune system: meta-analysis

Abstract

IMPORTANCE:

Psychological and health-restorative benefits of mind-body therapies have been investigated, but their impact on the immune system remain less defined.

OBJECTIVE:

To conduct the first comprehensive review of available controlled trial evidence to evaluate the effects of mind-body therapies on the immune system, focusing on markers of inflammation and anti-viral related immune responses.

METHODS:

Data sources included MEDLINE, CINAHL, SPORTDiscus, and PsycINFO through September 1, 2013. Randomized controlled trials published in English evaluating at least four weeks of Tai Chi, Qi Gong, meditation, or Yoga that reported immune outcome measures were selected. Studies were synthesized separately by inflammatory (n = 18), anti-viral related immunity (n = 7), and enumerative (n = 14) outcomes measures. We performed random-effects meta-analyses using standardized mean difference when appropriate.

RESULTS:

Thirty-four studies published in 39 articles (total 2, 219 participants) met inclusion criteria. For inflammatory measures, after 7 to 16 weeks of mind-body intervention, there was a moderate effect on reduction of C-reactive protein (effect size [ES], 0.58; 95% confidence interval [CI], 0.04 to 1.12), a small but not statistically significant reduction of interleukin-6 (ES, 0.35; 95% CI, -0.04 to 0.75), and negligible effect on tumor necrosis factor-α (ES, 0.21; 95% CI, -0.15 to 0.58). For anti-viral related immune and enumerative measures, there were negligible effects on CD4 counts (ES, 0.15; 95% CI, -0.04 to 0.34) and natural killer cell counts (ES, 0.12, 95% CI -0.21 to 0.45). Some evidence indicated mind-body therapies increase immune responses to vaccination.

CONCLUSIONS:

Mind-body therapies reduce markers of inflammation and influence virus-specific immune responses to vaccination despite minimal evidence suggesting effects on resting anti-viral or enumerative measures. These immunomodulatory effects, albeit incomplete, warrant further methodologically rigorous studies to determine the clinical implications of these findings for inflammatory and infectious disease outcomes.

Source: By Morgan N1, Irwin MR2, Chung M3, Wang C1. The effects of mind-body therapies on the immune system: meta-analysis. PLoS One. 2014 Jul 2;9(7):e100903. doi: 10.1371/journal.pone.0100903. eCollection 2014.

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By CStrasheim

Connie Strasheim is the author of multiple wellness books, including three on Lyme disease. She is also a medical copywriter, editor and healing prayer minister. Her passion is to help people with complex chronic illnesses find freedom from disease and soul-spirit sickness using whole body medicine and prayer, and she collaborates with some of the world’s best integrative doctors to do this. In addition to Lyme disease, Connie’s books focus on cancer, nutrition, detoxification and spiritual healing. You can learn more about her work at: ConnieStrasheim.com.

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