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Related Experiment Videos

[The PABA test].

G Müller, A Biering, K Graubaum

    Deutsche Zeitschrift Fur Verdauungs- Und Stoffwechselkrankheiten
    |January 1, 1984
    PubMed
    Summary

    The PABA test is a simple, reliable method to detect exocrine pancreatic insufficiency by measuring 4-aminobenzoic acid (PABA) in urine, reflecting chymotrypsin levels. However, results can be affected by various gastrointestinal and liver conditions.

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    Presse medicale (Paris, France : 1983)·1992

    Area of Science:

    • Gastroenterology
    • Biochemistry
    • Diagnostic Medicine

    Context:

    • Exocrine pancreatic insufficiency (EPI) diagnosis requires reliable functional tests.
    • The PABA test utilizes the enzymatic cleavage of a synthetic peptide by chymotrypsin.
    • Urinary 4-aminobenzoic acid (PABA) levels serve as a biomarker for pancreatic exocrine function.

    Purpose:

    • To evaluate the efficacy and reliability of the PABA test for diagnosing exocrine pancreatic insufficiency.
    • To outline the methodology of the PABA test, including substrate hydrolysis and PABA quantification.
    • To identify factors that may lead to false-positive or false-negative results.

    Summary:

    • The PABA test measures urinary 4-aminobenzoic acid (PABA) after oral administration of a PABA-containing peptide, which is cleaved by chymotrypsin.
    • Chymotrypsin activity, indicative of pancreatic exocrine function, is assessed by quantifying urinary PABA levels using the Bratton and Marshall method.
    • The test requires a 6-10 hour urine collection and a 60-minute acid hydrolysis step for accurate metabolite measurement.

    Impact:

    • The PABA test offers a straightforward and dependable method for assessing exocrine pancreatic function.
    • Understanding potential confounding factors is crucial for accurate interpretation of PABA test results.
    • This diagnostic tool aids in the management of conditions associated with pancreatic insufficiency.

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