THE MECHANISM OF ACUPUNCTURE AND CLINICAL APPLICATIONS

Acupuncture is an ancient practice that has been generating growing scientific interest, particularly because of its beneficial effects on a variety of health conditions. Originating in traditional Chinese medicine more than three thousand years ago, this technique involves the insertion of specialized needles into specific points on the body. Despite its long history, only in recent decades have researchers begun to unravel the scientific mechanisms that explain why and how acupuncture works. This understanding is essential so that patients and health care professionals can make informed decisions about its use as a complementary or alternative treatment.

The primary objective of this study was to review and synthesize the available scientific evidence on the mechanisms of action of acupuncture and its clinical applications. The investigators conducted a comprehensive narrative review, analyzing multiple experimental studies performed in both animals and humans. The methodology included analysis of research that investigated the neurologic, hormonal, and physiologic effects of acupuncture, with particular focus on the neurotransmitters and chemical substances released in the body during treatment. The authors examined studies that used different techniques, including traditional needle acupuncture and electroacupuncture, in which small electrical currents are applied through the needles to enhance the effects.

The findings revealed fascinating mechanisms by which acupuncture produces its therapeutic effects. When needles are inserted into specific points, they stimulate nerve receptors in the skin and muscle, triggering a cascade of reactions in the nervous system. The study showed that acupuncture significantly increases the levels of important substances in the brain and bloodstream, including endorphin-1, beta-endorphin, enkephalins, and serotonin. These substances are known as the body's "natural analgesics" and as neurotransmitters related to well-being.

Beta-endorphin, for example, is approximately 200 times more potent than morphine for pain relief. The investigators found that electroacupuncture is particularly effective at stimulating the release of these substances, producing more intense analgesic effects than traditional acupuncture. In addition, the research demonstrated that acupuncture influences the immune system, increasing the activity of natural killer cells and the production of important immune proteins. Effects on metabolism were also observed, with evidence that beta-endorphin released by acupuncture may help break down body fat.

For patients, these findings provide a solid scientific basis for understanding why acupuncture can be effective in a variety of conditions. The study confirms that acupuncture has well-founded clinical applications in the treatment of chronic pain, including migraine, fibromyalgia, osteoarthritis, and trigeminal neuralgia. The effects on the digestive system explain its usefulness in gastrointestinal disorders, while the increase in serotonin and enkephalins justifies its application in psychological disorders such as depression and anxiety. For health care professionals, these results provide evidence for incorporating acupuncture as a complementary treatment in integrated therapeutic plans.

The research also suggests that acupuncture may be valuable in the rehabilitation of patients with stroke and in the treatment of obesity, expanding its clinical applications. Importantly, the effects of acupuncture can be blocked by drugs such as naloxone, which blocks endorphin receptors, confirming that the body's natural opioid mechanisms are central to its therapeutic effects.

Although the results are promising, the study has some important limitations that should be considered. Many of the studies analyzed were performed in laboratory animals, and the results cannot always be directly extrapolated to humans. The review also acknowledges that, despite significant advances in understanding the mechanisms of acupuncture, there are still aspects that are not fully elucidated regarding how this technique works. In addition, the quality and design of clinical studies in humans vary considerably, which can influence interpretation of the results.

It is essential that patients interested in acupuncture seek appropriately qualified practitioners and discuss with their physicians how this technique can be integrated into their treatment. Although acupuncture has been shown to be safe when properly performed, it should be viewed as a complement to, not a substitute for, conventional medical treatments when these are needed. Future acupuncture research will likely bring even greater clarity about its mechanisms and applications, contributing to more integrative and personalized medicine.