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  • Jefferson Adams
    Jefferson Adams

    Can a Gluten-free Diet Prevent Obesity and Metabolic Disorders?

    Reviewed and edited by a celiac disease expert.

    Celiac.com 08/04/2014 - Can excluding gluten, the protein complex present in many cereals, help to prevent diseases other than celiac disease? Seeking to gain insight into the effects of gluten-free diets on obesity, and its mechanisms of action, a research team set out to assess whether gluten exclusion can prevent the development and expansion of adipose tissue.

    Photo: CC--FBellonSpecifically, they wanted to determine if a gluten-free diet reduces adiposity, inflammation and insulin resistance associated with the induction of PPAR-alpha and PPAR-gamma expression. The researchers included F.L. Soares, R. de Oliveira Matoso, L.G. Teixeira, Z. Menezes, S.S. Pereira, A.C. Alves, N.V. Batista, A.M. de Faria, D.C. Cara, A.V. Ferreira, and J.I. Alvarez-Leite. The are affiliated with the Departamento de Alimentos, Faculdade de Farmácia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais in Belo Horizonte, Brazil.



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    For their study, they fed a high-fat diet containing 4.5% gluten to a control group of C57BL/6 mice, and a gluten-free diet to another group of C57BL/6 mice. The team measured body weight and adiposity gains, leukocyte rolling and adhesion, macrophage infiltration and cytokine production in adipose tissue. They also measured blood lipid profiles, glycaemia, insulin resistance and adipokines, and determined expression of the PPAR-α and γ, lipoprotein lipase (LPL), hormone sensitive lipase (HSL), carnitine palmitoyl acyltransferase-1 (CPT-1), insulin receptor, GLUT-4 and adipokines in epidydimal fat.

    The gluten-free mice had less body weight gain and adiposity, with no changes in food intake or lipid excretion. These results are associated with up-regulation of PPAR-α, LPL, HSL and CPT-1, which are related to lipolysis and fatty acid oxidation.

    Gluten-free mice also showed improved glucose homeostasis and pro-inflammatory profile-related over-expression of PPAR-γ. Moreover, intravital microscopy showed a lower number of adhered cells in the adipose tissue microvasculature. The overexpression of PPAR-γ is related to the increase of adiponectin and GLUT-4.

    The study data support the beneficial effects of gluten-free diets in reducing adiposity gain, inflammation and insulin resistance. The data suggests that a gluten-free diet should be tested as a new dietary approach to preventing obesity and metabolic disorders.

    Source:



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  • About Me

    Jefferson Adams

    Jefferson Adams is Celiac.com's senior writer and Digital Content Director. He earned his B.A. and M.F.A. at Arizona State University, and has authored more than 2,500 articles on celiac disease. His coursework includes studies in science, scientific methodology, biology, anatomy, medicine, logic, and advanced research. He previously served as SF Health News Examiner for Examiner.com, and devised health and medical content for Sharecare.com. Jefferson has spoken about celiac disease to the media, including an appearance on the KQED radio show Forum, and is the editor of the book "Cereal Killers" by Scott Adams and Ron Hoggan, Ed.D.


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  • Related Articles

    Dr. Amy O'Connell
    Celiac.com 12/02/2011 - Some rumors have been circulating in the health foods community that gluten-free eating can encourage weight loss. Unfortunately, this theory is completely unfounded. Wendy Marcason, a registered dietician, published an article in the Journal of the American Dietetic Association in November that reviews some of the theories and controversy surrounding this issue. The article concludes that there is no scientific evidence to support a connection between eating gluten-free and losing weight.
    For those of us with celiac disease who start a gluten-free diet, weight gain is more often the case. The healing of the damaged intestines allows better absorption of food, and unless you rapidly change the amount of food you eat when you go gluten-free, most celiacs gain a substantial amount of weight after the switch. If you do not have celiac disease, however, eating gluten-free is unlikely to have any affect on weight independent from decreases in the overall calorie intake due to eating more carefully.
    The consequence of this conclusion by the American Dietetic Association may be that more non-celiacs recognize that gluten-free does not necessarily mean more healthy. Unfortunately, some of the increased availability of gluten-free food over the last decade is owed to these non-celiac gluten-free folks. If these non-celiacs stop eating gluten-free, the demand for gluten-free food will fall and te number of options may decrease.
    All of that said, the paper said that no evidence exists because there are no studies that look at weight loss on a gluten-free diet. While it's impossible to conclude that gluten-free diets cause weight loss, its also impossible to conclude that they don't cause weight-loss. Only a clinical study will be able to put the issue to rest.
    Reference:

    Marcason W. "Is There Evidence to Support the Claim that a Gluten-Free Diet Should Be Used for Weight Loss?" Journal of the American Dietetic Association. Nov 2011; 111(11): 1786.
    Weight Loss and the Gluten Free Diet by Ron Hoggan, Ed. D.
    First, I’d like to set Dr. O’Connell’s mind at rest. The claims for weight loss following adoption of a gluten-free diet aren’t merely rumors. They are credible claims based on peer reviewed and anecdotal reports, as well as published data from a qualified medical practitioner. For instance, Cheng and colleagues found that “54% of overweight and 47% of obese patients lost weight” (1). They investigated 81 subjects who were overweight and had celiac disease. Congruently, Venkatasubramani et al found that one half of their eight overweight pediatric patients also lost weight on a gluten free diet (2). These reports alone cast an ominous shadow over Dr. Marcason’s claims if Dr. O’Connell has represented them correctly. Marcason, we are told, asserts that no research has been done on this question. Yet there are three such reports in the peer reviewed literature (1, 2, 3). One reports a preponderance of weight gain among overweight and obese celiac patients after beginning a gluten free diet, while the other two groups report that about half of the overweight and obese celiac patients, children and adults, lose weight on a gluten free diet. Not only has this research been conducted and most of the findings not only contradict the claim that no such research has been done, but two of the three reports indicate that the gluten free diet helps with weight loss in some individuals. I think it is important to notice that the study showing that a large majority of overweight/obese celiacs was conducted where wheat starch is accepted as appropriate for celiac patients, while the two studies that showed weight loss were conducted in the USA. We still don’t know enough about the interaction between various constituents of gluten and people who lose weight on a gluten free diet.  However, given the contradictions in findings, between research conducted in the USA and some parts of Europe, it is not unreasonable to suggest that these differences may result from wheat starch.  
    Each of the three studies mentioned above have one large, consistent weakness. They are dealing with small numbers of patients. However, Dr. William Davis, a cardiologist has recently authored a book titled WHEAT BELLY, in which he reports that he has seen weight loss and other health improvements in more than 2,000 of his patients following adoption of a gluten free diet. And, of course, there are all the other anecdotal reports of similar benefits.
    Dr. O’Connell’s opposition to the use of a gluten free diet ignores the dynamics of appetite enhancement and satiation that are largely driven by hormones resulting from variations in nutrient density in various parts of the body. From insulin to glucagon to leptin to ghrelin, these and several other fat mobilizing hormones enhance and suppress our hunger based on the nutrients in our bloodstreams, gastrointestinal tract, and adipose tissues.  
    Dr. O’Connell also ascribes Marcason’s views to the American Dietetic Association which is the body that publishes the journal in which Dr. Marcason’s opinion article appears. While it may be true that the American Dietetics Association takes this position, it would be unusual for a journal, and the association that operates that journal, to underwrite the claims of one of its authors so I am skeptical that it has done so. I am especially skeptical of endorsement by the association, if Marcason has, indeed, stated that no studies have been conducted to investigate changes in body mass resulting from the gluten free diet among people who are overweight or obese at diagnosis. Clearly, this is an inaccurate claim whether it emanates from O’Connell or Marcason or even the American Dietetics Association.  
    I am also left wondering if there are any studies that show that “gluten-free does not necessarily mean more healthy” [sic]. I haven’t seen any and I would be very surprised if any exist. Dr. O’Connell didn’t cite any such studies, yet she asserts that a gluten free diet is not a healthy choice for those who do not have celiac disease. This is especially troubling in view of the growing recognition of non-celiac gluten sensitivity as a legitimate disease entity (5, 6, 7, 8, 9, 10). 
    I frequently write opinion articles so I would not want to inhibit such writing. Nonetheless, I believe that taking a rigid stance on either side of this issue is premature. Clearly we all have a lot to learn about weight loss and the gluten-free diet. The scanty evidence that is currently available is entirely too limited to say, with confidence, that the gluten-free diet is an effective weight loss tool, even for overweight patients with celiac disease. It appears to work for some, but other, unseen factors may be at work here.   
    Sources:

    Cheng J, Brar PS, Lee AR, Green PH. Body mass index in celiac disease: beneficial effect of a gluten-free diet. J Clin Gastroenterol. 2010 Apr;44(4):267-71. Venkatasubramani N, Telega G, Werlin SL. Obesity in pediatric celiac disease. J Pediatr Gastroenterol Nutr. 2010 Sep;51(3):295-7. Dickey W, Kearney N. Overweight in celiac disease: prevalence, clinical characteristics, and effect of a gluten-free diet. Am J Gastroenterol. 2006 Oct;101(10):2356-9. Davis W. Wheat Belly.Rodale, NY, NY 2011. Bizzaro N, Tozzoli R, Villalta D, Fabris M, Tonutti E. Cutting-Edge Issues in Celiac Disease and in Gluten Intolerance. Clin Rev Allergy Immunol. 2010 Dec 23. Ford RP. The gluten syndrome: a neurological disease. Med Hypotheses. 2009 Sep;73(3):438-40. Epub 2009 Apr 29. Sbarbati A, Valletta E, Bertini M, Cipolli M, Morroni M, Pinelli L, Tatò L. Gluten sensitivity and 'normal' histology: is the intestinal mucosa really normal? Dig Liver Dis. 2003 Nov;35(11):768-73. PubMed PMID: 14674666. Di Cagno R, De Angelis M, De Pasquale I, Ndagijimana M, Vernocchi P, Ricciuti P, Gagliardi F, Laghi L, Crecchio C, Guerzoni ME, Gobbetti M, Francavilla R. Duodenal and faecal microbiota of celiac children: molecular, phenotype and metabolome characterization. BMC Microbiol. 2011 Oct 4;11:219. Biesiekierski JR, Newnham ED, Irving PM, Barrett JS, Haines M, Doecke JD, Shepherd SJ, Muir JG, Gibson PR. Gluten causes gastrointestinal symptoms in subjects without celiac disease: a double-blind randomized placebo-controlled trial. Am J Gastroenterol. 2011 Mar;106(3):508-14 Bizzaro N, Tozzoli R, Villalta D, Fabris M, Tonutti E. Cutting-Edge Issues in Celiac Disease and in Gluten Intolerance. Clin Rev Allergy Immunol. 2010 Dec 23.

    Amy O'Connell, MD, PhD's Reply to Dr. Ron Hoggan:
    This is Dr. O'Connell replying. My piece was merely a summary of an article in the Journal of the ADA. The short summary I wrote was not intended to be an end-all conclusive statement about the matter. That said, the Cheng article that is cited by Ron Hoggard. M.Ed. was not designed to look at the outcome of weight loss in overweight celiacs and is underpowered to make the conclusions that he cites. Another quote from the same article said, "Overall, 54% [of patients who started a gluten-free diet] gained weight and 38% lost weight." The same problem with a lack of statistical power exists for the Venkatasubramani paper. Four obese patients lost weight on a gluten-free diet but 2 gained weight and 1 was lost to follow up. I'd like to apologize if my brief summary seemed too closed-ended, but I will stand by my article conclusion, "While it's impossible to conclude that gluten-free diets cause weight loss, its also impossible to conclude that they don't cause weight-loss. Only a clinical study will be able to put the issue to rest."

     


    Jefferson Adams
    Celiac.com 03/04/2013 - Morbid obesity is a common medical condition. In many cases, bariatric surgery is necessary. Although for decades celiac disease has been associated with chronic diarrhea and weight loss, and other classic symptoms, recent data shows that the clinical spectrum of celiac disease is extremely wide.
    A group of researchers recently reported on the benefits of diagnosing celiac disease during pre-operative work-up for bariatric surgery.
    The researchers included Federico Cuenca-Abente, Fabio Nachman, and Julio C. Bai of the Department of Surgery and Department of Medicine at Dr C. Bonorino Udaondo Gastroenterology Hospital in Buenos Aires, Argentina.
    They reported on the cases of five morbidly obese patients diagnosed with celiac disease during preoperative work-up for bariatric surgery. Celiac disease was suspected upon routine upper endoscopy, and confirmed by histology and positive celiac disease-specific blood tests.
    Interestingly, four of the five patients had no obvious symptoms. One complained of chronic diarrhea and anemia. All patients began a gluten-free diet. Due to their celiac disease diagnosis, doctors offered all five patients a purely restrictive bariatric procedure. At the time of the report, three of the patients had received a sleeve gastrectomy, while the other two were still undergoing pre-operative evaluation.
    The team's findings help to enlarge the clinical spectrum of untreated celiac disease. Even though rates of celiac disease in obese patients seems to be similar to that in the general population, the team recommends that patients with morbid obesity be tested for celiac disease in order to determine the best surgical strategy and outcome.
    Source:
    Acta Gastroenterol Latinoam 2012;42:321-324


    Jefferson Adams
    Celiac.com 11/28/2014 - According to a new study, obesity plays a major part in triggering and prolonging autoimmune diseases, such as celiac disease, Crohn's disease and multiple sclerosis.
    The study appeared recently in Autoimmunity Reviews by Prof. Yehuda Shoenfeld, the Laura Schwarz-Kipp Chair for Research of Autoimmune Diseases at Tel Aviv University's Sackler Faculty of Medicine and Head of Zabludowicz Center for Autoimmune Diseases at Chaim Sheba Medical Center, Tel Hashomer.
    According to the research, obesity erodes the body's ability to protect itself, triggering a pro-inflammatory environment that promotes the development of autoimmune diseases, hastens their progression, and impairs their treatment.
    For some time now, says Professor Shoenfeld, researchers have been aware of the “negative impact of contributing disease factors, such as infections, smoking, pesticide exposure, lack of vitamins, and the like. But in last five years, a new factor has emerged that cannot be ignored: obesity.”
    According to the World Health Organization, about one-third of the global population is overweight or obese, nearly a dozen autoimmune diseases are now associated with excess weight, which now impact nearly 5-20% of the global population. That is why, according to Shownfeld, it is “critical to investigate obesity's involvement in the pathology of such diseases."
    The main culprit is not fat itself, but adipokines, compounds secreted by fat tissue, which impact numerous physiological functions, including the immune response.
    In tandem with their own study, Shoenfeld and his colleagues reviewed 329 studies from across the globe that focused on the connections between obesity, adipokines, and immune-related conditions like rheumatoid arthritis, multiple sclerosis, type-1 diabetes, psoriasis, inflammatory bowel disease, psoriatic arthritis, and Hashimoto thyroiditis.
    "According to our study and the clinical and experimental data reviewed, the involvement of adipokines in the pathogenesis of these autoimmune diseases is clear," says Shoenfeld. "We were able to detail the metabolic and immunological activities of the main adipokines featured in the development and prognosis of several immune-related conditions."
    One of the team’s more interesting findings was that obesity also promotes vitamin D deficiency, which, “once corrected, alleviated paralysis and kidney deterioration associated with the disorder… [and] improved the prognosis and survival of the mice.”
    Source:
    Science Daily, November 10, 2014


    Jefferson Adams
    Celiac.com 03/10/2015 - Up to now, celiac disease has been described only in sporadic cases of obesity. A research team recently set out to evaluate retrospectively celiac disease rates in a large group of overweight/obese children and adolescents.
    The research team included Raffaella Nenna, Antonella Mosca, Maurizio Mennini, Raffaele E. Papa, Laura Petrarca, Roberta Mercurio, Monica Montuori, Alessandra Piedimonte, Maria Bavastrelli, Ilaria C. De Lucia, Margherita Bonamico, and Andrea Vania.
    For their study, the team consecutively evaluated 1,527 overweight/obese children and adolescents, 10 girls and 7 boys had positive celiac serology and showed villous atrophy.
    All celiac patients immediately began a well-balanced gluten-free diet, and rapid weight loss followed.
    The study shows that celiac rates in overweight/obese children are similar to rates in the general Italian pediatric population, and that those children benefit from proper diagnosis and a healthy gluten-free diet.
    Source:
    Journal of Pediatric Gastroenterology & Nutrition: March 2015 - Volume 60 - Issue 3 - p 405–407. doi: 10.1097/MPG.0000000000000656


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