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Liver structure and function following small bowel resection.

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    Extensive small bowel resection impairs liver function, reducing BSP clearance. Liver function and BSP clearance recover within weeks, but serum alkaline phosphatase remains depressed, especially after distal resection.

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    Area of Science:

    • Hepatology
    • Gastroenterology
    • Surgical Research

    Background:

    • Extensive small bowel resection is associated with impaired liver function.
    • Hepatocellular dysfunction, reduced bromosulphthalein (BSP) clearance, and fatty liver changes are observed in patients.
    • The impact of proximal versus distal small bowel resection on liver function requires systematic investigation.

    Purpose of the Study:

    • To investigate the effects of proximal and distal small bowel resection on liver structure and function in a rat model.
    • To assess the impact on bromosulphthalein (BSP) clearance and serum liver enzymes.
    • To evaluate the recovery patterns of hepatic function and serum alkaline phosphatase levels post-resection.

    Main Methods:

    • Performed proximal and distal small bowel resection in rats.
    • Assessed bromosulphthalein (BSP) clearance, including uptake and excretion phases.
    • Monitored circulating liver enzymes and serum alkaline phosphatase (AP) levels.
    • Conducted isoenzyme studies to identify the source of AP changes.
    • Examined liver biopsies for structural changes (fatty change).

    Main Results:

    • Small bowel resection exacerbated BSP clearance impairment beyond surgical effects.
    • Distal resection showed more pronounced BSP retention than proximal resection.
    • BSP excretion abnormalities normalized within 3-4 weeks post-surgery.
    • Serum alkaline phosphatase (AP) was significantly depressed, particularly after distal resection, due to reduced intestinal isoenzyme.
    • Serum AP levels normalized 2-4 weeks after ileectomy (distal resection).

    Conclusions:

    • Small bowel resection temporarily impairs hepatocellular function, affecting BSP clearance.
    • While hepatic function recovers, reduced serum alkaline phosphatase, linked to intestinal isoenzyme, persists longer after proximal resection.
    • These hepatic and alkaline phosphatase changes, though minor, could be clinically significant in malnourished patients post-extensive small bowel resection.