Celiac Disease and Gluten Intolerance: Immune Response and Intestinal Villous Atrophy – A Histological and Molecular Study
Celiac disease is an autoimmune disorder triggered by gluten. When people with this condition eat gluten, their immune system reacts strongly. This reaction damages the small intestine.
Researchers conducted a detailed histological and molecular study to understand the damage. They examined tissue samples from the small intestine of affected patients. The study clearly showed progressive destruction of intestinal villi.
In the early stage, the villi become shorter and broader. As the disease advances, the villi completely flatten. This condition is called villous atrophy. As a result, the intestine loses its ability to absorb nutrients properly.
The immune response plays a central role in this damage. When gluten enters the intestine, it activates specific immune cells. These cells release inflammatory chemicals called cytokines. Moreover, the body produces antibodies against tissue transglutaminase (tTG), which further worsens the injury.
At the molecular level, scientists observed increased expression of certain genes related to inflammation. They also noted changes in tight junction proteins that normally protect the intestinal barrier. These molecular alterations make the gut lining more permeable and sensitive.
Furthermore, the study compared patients with celiac disease and those with non-celiac gluten sensitivity. Both groups showed symptoms, but only celiac patients displayed clear villous atrophy under the microscope.
The findings highlight that early diagnosis and strict gluten-free diet can reverse the damage. In many cases, the villi start to regenerate within months of removing gluten from the diet.
Overall, this histological and molecular study provides deeper insight into how gluten triggers immune attacks and leads to intestinal damage. It also emphasizes the importance of timely intervention to prevent long-term complications.