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Related Experiment Videos

Intestinal sugar transport during ageing.

C Lindi, P Marciani, A Faelli

    Biochimica Et Biophysica Acta
    |June 27, 1985
    PubMed
    Summary

    Ageing significantly impacts sugar intestinal transport in rats. Young rats exhibit greater D-glucose transport, with driving forces shifting from chemical to electrical gradients as animals age.

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    Area of Science:

    • Gastroenterology
    • Physiology
    • Aging Research

    Background:

    • Intestinal sugar transport is crucial for nutrient absorption.
    • Age-related changes in physiological functions are not fully understood.
    • Investigating how ageing affects sugar absorption provides insights into gut health.

    Purpose of the Study:

    • To investigate the effects of ageing on intestinal sugar transport in rats.
    • To identify age-related changes in D-glucose and Na+ transport.
    • To determine the driving forces behind sugar accumulation during ageing.

    Main Methods:

    • Everted sac technique to measure net transintestinal transport.
    • Brush-border membrane vesicle experiments to assess D-glucose uptake.
    • Short-circuiting with valinomycin to analyze ion gradients.

    Main Results:

    • Net D-glucose transport and intracellular accumulation were highest in young rats, declining with age.
    • Net Na+ transport decreased with age after peaking in very young and young rats.
    • The driving forces for D-glucose accumulation shifted from Na+ chemical potential gradient in very young rats to electrical potential gradient in adult rats.

    Conclusions:

    • Ageing significantly alters intestinal sugar transport mechanisms in rats.
    • Both Na+ chemical and electrical potential gradients play age-dependent roles in sugar absorption.
    • Understanding these age-related shifts is vital for addressing nutritional challenges in aging populations.

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