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Brain stimulation shows promise in treating obesity by reducing food cravings

Brain stimulation shows promise in treating obesity by reducing food cravings

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Stimulating the brain to alter its intrinsic reward system shows promise in the treatment of obesity, according to results presented in Barcelona at the European Society of Endocrinology annual meeting, ECE 2018. The technique has yielded positive results after just a single treatment session, revealing its potential to become a safer alternative to treat obesity, avoiding invasive surgery and drug side effects.

Obesity is a global epidemic, with approximately 650 million adults and 340 million children and adolescents currently considered obese, and the disease contributing to an estimated 2.8 million deaths per year worldwide. It has been reported that, in some obesity cases, the reward system in the brain may be altered, causing a greater reward response to food than in normal weight individuals. This can make patients more vulnerable to craving, and can lead to weight gain. This dysfunction in the reward system can also be seen in cases of addiction to substances, e.g. drugs or alcohol, or behaviors, e.g. gambling.

Deep Transcranial Magnetic Stimulation (dTMS) is a medical treatment that uses magnetic energy to stimulate neurons in specific areas of the brain. It is used to treat depression and addictive behaviors, and previous studies have suggested that dTMS could be a good option to reduce drug and food cravings. However, the potential mechanism driving these changes had not been investigated until now.

In this study, Professor Livio Luzi and colleagues, from the Istituto di Ricovero e Cura a Carattere Scientifico Policlinico San Donato, Italy, investigated the effects of dTMS on appetite and satiety in obese people. They studied the effects of a single 30 minute session of dTMS, at high or low frequency, on blood markers potentially associated with food reward in a group of 40 obese patients. They found that high frequency dTMS significantly increased blood levels of beta-endorphins – neurotransmitters involved in producing heightened feelings of reward after food ingestion – compared to low frequency dTMS or controls.

“For the first time, this study is able to suggest an explanation of how dTMS could alter food cravings in obese subjects” says Professor Luzi. “We also found that some blood markers potentially associated with food reward, for example glucose, vary according to gender, suggesting male/female differences in how vulnerable patients are to food cravings, and their ability to lose weight.”

Since the current study only measures changes in blood markers, the next steps for the research group include using brain imaging studies to directly identify how high frequency dTMS changes the structure and function of the obese brain, both short and long term, and extending this treatment to a larger population of obese patients.

“Given the distressing effects of obesity in patients, and the socioeconomic burden of the condition, it is increasingly urgent to identify new strategies to counteract the current obesity trends. dTMS could present a much safer and cheaper alternative to treat obesity compared to drugs or surgery”, Professor Luzi adds.

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https://www.ese-hormones.org/

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