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What is the history of Microvillus Inclusion Disease?

When was Microvillus Inclusion Disease discovered? What is the story of this discovery? Was it coincidence or not?

History of Microvillus Inclusion Disease

Microvillus Inclusion Disease (MVID) is a rare genetic disorder that affects the functioning of the small intestine. It was first described in medical literature in the early 1970s by Dr. William K. Mitchel and Dr. Robert J. Schmitz. MVID is also known as congenital microvillus atrophy or microvillus inclusion body disease.



MVID is an autosomal recessive disorder, meaning that both parents must carry a mutated gene for their child to be affected. The specific gene associated with MVID is called MYO5B, which provides instructions for making a protein involved in the movement of cellular structures called microvilli. Microvilli are tiny finger-like projections on the surface of cells that line the intestines, aiding in the absorption of nutrients.



The symptoms of MVID typically appear shortly after birth. Affected infants often experience severe, watery diarrhea that leads to life-threatening dehydration. The diarrhea is persistent and does not improve with changes in diet or medication. Additionally, affected individuals may have difficulty gaining weight and may experience malnutrition. The condition can also lead to electrolyte imbalances and metabolic acidosis.



Diagnosing MVID involves a combination of clinical evaluation, laboratory tests, and genetic testing. The characteristic features of the disease, such as severe diarrhea and malabsorption, help guide the diagnosis. Laboratory tests may reveal abnormal electrolyte levels and metabolic acidosis. Genetic testing can confirm the presence of mutations in the MYO5B gene.



Currently, there is no cure for MVID. Treatment primarily focuses on managing the symptoms and complications associated with the disease. Infants with MVID often require intravenous fluids to correct dehydration and maintain electrolyte balance. Nutritional support through specialized formulas or total parenteral nutrition (TPN) may be necessary to ensure adequate nutrition. In some cases, small bowel transplantation may be considered as a treatment option.



The prognosis for individuals with MVID varies. The severity of the disease can range from mild to severe, with some cases being more responsive to treatment than others. Early diagnosis and intervention are crucial in improving outcomes. With appropriate management, some individuals with MVID can achieve a reasonable quality of life and reach adulthood.



Research efforts are ongoing to better understand the underlying mechanisms of MVID. Scientists are investigating the role of the MYO5B gene and its protein product in the development and function of microvilli. This knowledge may lead to the development of targeted therapies in the future.



In conclusion, Microvillus Inclusion Disease is a rare genetic disorder that affects the small intestine. It is characterized by severe diarrhea, malabsorption, and electrolyte imbalances. Diagnosis involves clinical evaluation, laboratory tests, and genetic testing. While there is currently no cure, management focuses on symptom control and nutritional support. Prognosis varies, and ongoing research aims to improve our understanding of the disease and develop potential treatments.


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History of Microvillus Inclusion Disease

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