Anti-inflammatory actions of acupuncture

Acupuncture is a centuries-old therapy from traditional Chinese medicine that has attracted growing interest in the Western world as a complementary treatment for several health conditions. Although it has been widely used in China for more than five thousand years, its efficacy in the treatment of inflammatory diseases still generates debate in the Western medical community. This study reviewed scientific evidence on the possible anti-inflammatory effects of acupuncture, seeking to better understand how this therapy can influence inflammatory processes in the body.

The aim of this research was to systematically examine the available evidence on the anti-inflammatory effects of acupuncture across different medical conditions and to propose a hypothesis regarding the mechanisms by which this therapy may exert its actions. Investigators performed a comprehensive review of the scientific literature, analyzing controlled clinical studies that investigated the use of acupuncture in inflammatory diseases such as asthma, rhinitis, inflammatory bowel disease, rheumatoid arthritis, epicondylitis, and complex regional pain syndrome. They also examined studies that investigated how acupuncture affects chemical substances involved in inflammation, including neuropeptides, cytokines, and nitric oxide.

The results of the review revealed a complex and at times contradictory picture. With respect to asthma, some open-label studies showed promising results, with one study reporting a 96% efficacy rate when patients received extensive treatment with at least thirty sessions over three months. However, more rigorous systematic reviews and meta-analyses were unable to confirm significant benefits of acupuncture for objective parameters such as pulmonary function. For allergic rhinitis, results were similarly mixed, with some studies showing improvement in subjective symptoms but limited effects on objective measures.

In inflammatory bowel disease and rheumatoid arthritis, evidence remained insufficient to establish the efficacy of acupuncture as a complementary treatment. Investigators also found that acupuncture appears to influence substances important in the inflammatory process, including calcitonin gene-related peptide, substance P, beta-endorphins, and various inflammatory cytokines.

The clinical implications of this study are significant for both patients and clinicians. For patients considering acupuncture as a complementary treatment for inflammatory conditions, it is important to understand that, although some studies suggest benefits, the scientific evidence is not yet robust enough to recommend acupuncture as a substitute for established conventional treatments. The results suggest that acupuncture may offer some symptomatic relief, particularly for subjective aspects such as quality of life and perception of pain, but its effects on objective markers of inflammation remain inconsistent. For clinicians, this study highlights the need for a cautious approach when considering acupuncture as complementary therapy, always maintaining proven conventional treatments as the basis of medical care.

The research also reveals that the effects of acupuncture may depend significantly on the frequency, duration, and specific technique used, suggesting that more standardized protocols may be needed to adequately assess its efficacy.

The study has several important limitations that should be considered when interpreting the results. First, many of the studies reviewed included small numbers of participants, limiting the ability to detect significant effects. Second, there is great variability in the acupuncture techniques used across studies, including point selection, depth of needle insertion, session duration, and treatment frequency. This methodological heterogeneity makes it difficult to compare results across studies and establish optimal protocols.

Third, the concept of placebo in acupuncture is particularly challenging because it is difficult to create a truly inactive control without penetrating the skin or stimulating points that may have some therapeutic effect according to traditional Chinese medicine. Investigators also noted that many studies relied primarily on subjective measures reported by patients, which can be influenced by expectations and placebo effects. Finally, although the study proposed plausible biological mechanisms by which acupuncture may exert anti-inflammatory effects, more research is needed to confirm these hypotheses and establish clear causal relationships between acupuncture treatment and changes in inflammatory markers. Future studies should include larger samples, more rigorous methodologies, and both objective and subjective measures to provide more definitive evidence regarding the role of acupuncture in the treatment of inflammatory conditions.