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Liver Involved in Appetite and Obesity
New research shows that a liver-brain connection exists and it might influence our ability to lose excessive weight.
Unfair as it may seem, some people can maintain a healthy weight effortlessly, while others pack on the pounds easily. The standard format for healthfully losing excess weight pivots around eating a low-fat, high-fiber diet and exercising regularly. Although a constant stream of well-meaning entrepreneurs try to convince people that weight loss can occur safely by popping a pill, health advocates recognize most of these attempts to be temporary, futile or dangerous. Proper nutrition and adequate physical activity remains the cornerstone of keeping fit. Yet, new research from Australia shows that the liver is crucial in determining why certain individuals gain weight. One day, this discovery could have a dramatic impact on the standard recipe for weight loss.
Previously, experts did not believe that the liver played an important role in controlling body weight. Instead, a majority of pharmaceutical weight loss strategists target chemicals produced in the brain and the stomach. However, research published in the May 2012 edition of the journal Diabetes has revealed that a liver enzyme could be responsible for regulating appetite and weight gain.
Researchers from the University of Melbourne believe they are the first to identify the liver enzyme, liver fructose-1,6-bisphosphatase as a major component of bodyweight regulation. Referred to as liver FBPase, this enzyme is needed in the production of glucose and is elevated with obesity and dietary fat intake. As such, many believed that too much FBPase was unhealthy. However, the recent study that emerged from Australia arrived at a different conclusion.
According to Dr. Barbara Fam from the University’s Molecular Obesity Laboratory group at Austin Health, liver FBPase triggers a number of hormones in the brain that influence the control of appetite. More specifically, Fam stated, “The results suggest that consumption of a diet high in fat causes an increase in liver FBPase that was likely put in place as a negative feedback mechanism to limit further weight gain. Importantly, FBPase does not function to control bodyweight under normal physiological circumstances but acts only when the system is exposed to excess nutrients such as fat.”
Compared to those without extra FBPase, the animal study found that over-expression of liver FBPase resulted in:
• 50 percent less fat deposition
• 15 percent less food intake
• No change in energy levels
This landmark study provides evidence that there is a negative feedback system between the liver and the brain that controls appetite and weight gain. As such, common health problems relating to obesity and diabetes could stem from a malfunction in this system.
It is well-known that FBPase is needed in the production of glucose. Consequently, several pharmaceutical companies are developing drugs for type 2 diabetes that inhibit FBPase to lower blood glucose levels. However, this approach does not take the negative feedback mechanism into account. Because of the negative feedback system that appears to produce excess FBPase for lowering appetite and obesity, an FBPase inhibitor might also increase food intake and exacerbate obesity.
The study of weight regulation continues to prove itself as being highly complex. This University of Melbourne study confirms that the liver plays a role in our weight via its ability to communicate with the brain. No longer viewed as an isolated organ, the liver – and its production of FBPase – could become a new area of study to help those trying to improve their health by losing excess weight.
http://diabetes.diabetesjournals.org/content/61/5/1122.abstract, The Role of Liver Fructose-1,6-Bisphosphatase in Regulating Appetite and Adiposity, Sherley Visinoni, et al, Retrieved May 11, 2012, Diabetes, May 2012.
http://www.cosmosmagazine.com/news/5546/new-direction-weight-control, Liver enzyme a new target for weight control, Selina Haefeli, Retrieved May 11, 2012, Luna Media Pty Ltd, 2012.
http://www.ncbi.nlm.nih.gov/pubmed/16649140, Regulation of fat metabolism in the liver: link to non-alcoholic hepatic steatosis and impact of physical exercise, Lavoie, JM, et al, Retrieved May 9, 2012, Cellular and Molecular Life Sciences, June 2006.
http://www.sciencealert.com.au/news/20122304-23332.html, Liver Can Control Weight Gain, The University of Melbourne, Retrieved May 9, 2012, ScienceAlert Pty Ltd., 2012.
About the Author
Nicole Cutler, L.Ac., MTCM is a long time advocate of integrating perspectives on health. With a Bachelor's degree in Neuroscience from the University of Rochester and a Master's degree in Traditional Chinese Medicine from Five Branches Institute, Nicole has been a licensed acupuncturist since 2000. She has gathered acupuncture licenses in the states of California and New York, is a certified specialist with the National Acupuncture Detoxification Association, has earned diplomat status with the National Commission of Chinese and Oriental Medicine in Acupuncture and Chinese Herbology and is a member of the Society for Integrative Oncology. In addition to her acupuncture practice that focuses on stress and pain relief, digestion, immunity and oncology, Nicole contributes to the integration of healthcare by writing articles for professional massage therapists and people living with liver disease.
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Recently, over 2 years and mostly the last 1 year, I dropped over 50 pounds and no one can figure out why. Could WEIGHT LOSS be related to this FBPase in the liver? I have been tested for parasites and you name it. I am a walking skeleton since my appetitie is non-existant and tastes have changed as well. Not to mention I can no longer tolerate (digest) meat. Is this to do with inability to process protein all of a sudden? Very strange and people around me are worried since I am 98 pounds and live on MASS Muscle Builder on top of food, yet still 98 pounds. Can anyone out there please help me and perhaps I can guide the doctor to a different area to consider. Blessings all.
Have your Thyroid checked. Sounds like over active thyroid symptions.
Have you been tested for Hepatitis C? Not knowing your health history, this is just an off-the-wall suggestion. More likely it’s some digestive problem, but with Hepatitis C, your liver isn’t working right, your blood sugar can change (sometimes you get diabetes), some foods no long sound good or taste (fried foods, proteins, etc.). You also commonly have a fatigue like you’ve never felt before. You said you’ve been tested for a multitude of illnesses, Hepatitis C is something the average doctor does not test for. Sometimes, a doctor may check your liver enzymes and leave it at that. That is not enough. A gastroenterologist needs to run a specific test to show yes or no for the disease. You might not have all the symptoms, but you do have some similar to symp. of Hep C. No reason to get worried or wonder if – take the blood test.
Whatever is going wrong inside you, I’ll be thinking of you, hoping you find the problem, that it has an easy treatment, and that you will be well, soon. It does not seem like an easy life right not, but it can change.
Karen, I agree with memyself. I also started losing weight. Was not interested in food. Extreme fatique. Do you have bone or body pain? I was drinking the protein powder too. Nothing worked. later I found out I had hep C. There are 4 stages to hep C. So you could be in an early stage, if so there is hope.
In a recent blood test I found that I have alittle inflamation..(AST/ALT) were alittle on the high side (36/39)…checked for Hep A,B,C..all negative…I find it odd since I keep a a pretty clean diet and exercise regularly..I take supplements but none with Iron…was wondering what herbs can keep the inflamation down
There are many supplements that can assist with inflammation. You may want to speak with your doctor about taking curcumin (turmeric), NAC, phospholipids, omega 3, blueberry leaf, sage leaves, etc. Have you reviewed the information for the comprehensive liver product offered here called Clinical LiverSupport which contains ingredients to support natural anti-inflammatory actions in the body? http://www.liversupport.com/clinical-liversupport.htm
There are many supplements that can assist with inflammation. You may want to speak with your doctor about taking curcumin (turmeric), NAC, phospholipids, omega 3, blueberry leaf, sage leaves, etc. Have you reviewed the information for the comprehensive liver product offered here called Clinical LiverSupport which contains ingredients to support natural anti-inflammatory actions in the body? http://www.liversupport.com/clinical-liversupport.htm
Watch out with what you eat especially the fastfoods. Take a regular exercise and take supplement to help ease ur the Liver prob…