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Reproductive hormone 'oxytocin' shows potential as weight-loss treatment

Washington , Tue, 26 Jun 2012 ANI

Washington, June 26 (ANI): In a new animal study, researchers have found that the reproductive hormone, oxytocin, helps regulate food intake and energy metabolism without causing adverse effects.

Secreted by the brain, the neural hormone, helps initiate contractions of the uterus and breast-milk-producing glands during childbirth and nursing.

Prior research by lead author Yuko Maejima, Ph.D., and her co-investigators also linked oxytocin to the process of controlling energy intake and use.

"These findings reveal novel anti-obese and anti-metabolic-syndrome effects of oxytocin. Thus, our results provide an avenue for developing an oxytocin-based effective and safe treatment of obesity," said Maejima, who also is an assistant professor in the physiology department at Jichi Medical University in Shimotsuke, Tochigi, Japan.

Excess weight is a risk factor for numerous diseases, including diabetes, heart and blood-vessel disease, and cancer, and is a major problem throughout the world. Obesity rates have more than doubled since 1980, according to statistics from the World Health Organization, which indicate that more than 1.4 billion adults are overweight and upwards of 500 million are obese.

In an obese animal model, the investigators found that daily injections of oxytocin reduced the amount of food the animals consumed, as well as decreased their body weight during, and for nine days after, treatment.

Similar results were observed with oxytocin administered by implanted mini pumps. This drug-delivery method also reduced fat in the liver, improved glucose tolerance, and decreased abdominal fat, which is a major risk factor for heart and blood-vessel, or cardiovascular disease. Additionally, the mini pumps decreased the size of fat-storage cells, or adipocytes, but did not adversely affect blood pressure or activity levels.

"The finding that peripheral oxytocin treatment has no effect on the normal blood-pressure levels or the locomotor activity of this mouse model suggests that oxytocin may not influence the cardiovascular system or emotions," Maejima said.

To induce obesity, investigators first fed the animal model a high-fat diet. They then administered oxytocin via injection for 17 days, and through the implantable mini pumps for 13 days.

The results will be presented at The Endocrine Society's 94th Annual Meeting in Houston. (ANI)


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Comments:

Anne

June 27, 2012 at 3:35 AM

My concern with this is that patients who lose weight with the help of pills or hormones still need to learn how to make lifestyle changes to keep the weight off. I worry that people who take pills don’t try other options first – options that have fewer side effects. Belleruth Naparstek has a website where she outlines studies that have shown that hypnotherapy, meditation, yoga, and other similar methods help many people lose weight. These options are well worth trying before a patient tries medication or surgery.


 

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