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Small intestinal structure and passive permeability in systemic sclerosis

I Cobden, J Rothwell, A T Axon

    Gut
    |April 1, 1980
    PubMed
    Summary
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    Systemic sclerosis patients show normal passive intestinal permeability. Malabsorption in these patients is typically due to other factors, not direct intestinal permeability issues.

    Area of Science:

    • Gastroenterology
    • Rheumatology
    • Internal Medicine

    Background:

    • Systemic sclerosis is an autoimmune disease affecting connective tissues.
    • Gastrointestinal involvement is common in systemic sclerosis, but its mechanisms are not fully understood.
    • Intestinal permeability is a key factor in nutrient absorption and gastrointestinal health.

    Purpose of the Study:

    • To investigate passive intestinal permeability in patients with systemic sclerosis.
    • To determine the causes of malabsorption in systemic sclerosis.

    Main Methods:

    • Peroral jejunal biopsies were performed on 17 patients with systemic sclerosis.
    • Passive intestinal permeability was assessed using the cellobiose/mannitol test.
    • Xylose absorption tests were conducted, with results analyzed alongside renal function, bacterial contamination, and gastrointestinal transit.

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    Main Results:

    • Jejunal biopsies revealed abnormalities in 4 patients, primarily in deeper structures.
    • Minimal villous atrophy was observed in 2 patients without epithelial cell changes.
    • Passive intestinal permeability was normal in all patients; however, 7 patients had abnormal xylose test results, often explained by other medical conditions.

    Conclusions:

    • Passive intestinal permeability is not impaired in systemic sclerosis.
    • Malabsorption in systemic sclerosis is attributable to factors other than compromised intestinal permeability.
    • Further investigation into renal function, bacterial contamination, and transit is warranted for understanding malabsorption in this condition.