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Why Gluten is Harmful for Individuals with Celiac Disease: Exploring the Science?

(5 min read)

July 27, 2024

Celiac Disease: Understanding the Gluten Threat

Celiac disease is an autoimmune disorder affecting about 1% of the global population. It’s triggered by gluten, a protein in wheat, barley, and rye. When individuals with celiac disease consume gluten, their immune system attacks the small intestine, leading to damage and inflammation. This response can cause symptoms like abdominal pain, bloating, diarrhea, and malabsorption of nutrients, which, if untreated, can result in long-term health complications.

Gluten and the Immune Response

Gluten in wheat consists of two main proteins: gliadin and glutenin in Rye, the protein is Secalin and in Barley is Hordein. Gliadin is the primary trigger for celiac disease. When it enters the digestive tract, it interacts with the enzyme tissue transglutaminase (tTG), which modifies the protein. This modified gliadin is then identified as a threat by the immune system, leading to the production of specific antibodies. These antibodies attack the lining of the small intestine, causing villous atrophy, where the tiny, nutrient-absorbing projections become damaged and flattened.

Molecular Cascade and Intestinal Damage

As gluten fragments travel through the small intestine, they interact with chemokine receptors on intestinal cells, prompting the release of zonulin, a protein that regulates intestinal permeability. Increased permeability allows gluten fragments to penetrate the intestinal barrier. Once inside, these fragments encounter immune cells, triggering an inflammatory response. Pro-inflammatory cytokines like interleukin-8 (IL-8) and interleukin-15 (IL-15) are produced, attracting more immune cells to the site of inflammation.

Role of Tissue Transglutaminase

Tissue transglutaminase (tTG) is a crucial enzyme in the development of celiac disease. Inflammatory conditions caused by gluten exposure activate tTG, which then deamidates gluten peptides, turning them into highly immunogenic molecules. These molecules are recognized by HLA-DQ2 and HLA-DQ8 on antigen-presenting cells, further fueling the immune response.

Genetic Predisposition

Celiac disease has a strong genetic component, primarily involving the HLA-DQ2 and HLA-DQ8 genes. These genes encode proteins that present gluten peptides to immune cells, triggering inflammation. Although possessing these genes doesn't guarantee developing celiac disease, it significantly increases the risk. This genetic link highlights the importance of family history and potential genetic testing for at-risk individuals.

Diagnosis and Treatment

Diagnosing celiac disease involves a medical history, physical exams, blood tests (like tTG-IgA and EMA-IgA), genetic testing for HLA-DQ2 and HLA-DQ8, and an endoscopy with biopsy. Treatment includes a strict gluten-free diet, nutritional guidance, and supplements for deficiencies. Regular doctor visits are essential for managing symptoms and monitoring health. Education and support groups arealso beneficial.

Summary

Celiac disease involves complex immune responses and genetic factors. Early diagnosis and strict adherence to a gluten-free diet are crucial for managing the condition and preventing long-term complications. Ongoing research and awareness are vital to improving the quality of life for those affected by this disorder.

References

Celiac disease: ten things that every gastroenterologist should know. Link 

Rabadie, V., Sollid, L. M., Barreiro, L. B., & Jabri, B. (2011). Integration of genetic and immunological insights into a model of celiac disease pathogenesis. Link

Abadie, V., Sollid, L. M., Barreiro, L. B., & Jabri, B. (2011). Integration of genetic and immunological insights into a model of celiac disease pathogenesis. Link

Canova, C., Pitter, G., Ludvigsson, J. F., Romor, P., Zanier, L., Zanotti, R., & Simonato, L. (2016). Celiac disease and risk of autoimmune disorders: a population-based matched birth cohort study. Link

Fasano, A., & Catassi, C. (2001). Current approaches to diagnosis and treatment of celiac disease: an evolving spectrum. Link

Therrien, A., Kelly, C. P., & Silvester, J. A. (2020). Celiac disease: extraintestinal manifestations and associated conditions. Link

Checkout our Gluten Free Atta!

Lab certified with 20ppm Gluten


                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified

                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified

                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified

                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified

                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified

                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified

                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified

                  
                    Gluten-Free Atta - 1 Kg -  Lab Certified
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Gluten-Free Atta - 1 Kg - Lab Certified

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