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Related Experiment Videos

Hexose transport by chicken cecum during development.

J M Planas, M C Villá, R Ferrer

    Pflugers Archiv : European Journal of Physiology
    |August 1, 1986
    PubMed
    Summary

    Chicken cecum hexose accumulation, particularly in proximal segments, is crucial for sugar absorption during early development. This ability declines with age, especially in distal regions, but remains significant in proximal sections of older birds.

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    Area of Science:

    • Animal Physiology
    • Gastrointestinal Biology
    • Nutrient Absorption

    Background:

    • The role of the chicken cecum in nutrient absorption during development is not fully understood.
    • Hexose transport mechanisms in avian gastrointestinal tissues require further investigation.

    Purpose of the Study:

    • To investigate the developmental changes in hexose accumulation capacity of chicken cecal tissue.
    • To determine the regional differences in sugar transport within the chicken cecum.
    • To characterize the kinetics of phloridzin-sensitive hexose transport in the cecum.

    Main Methods:

    • Tissue slices from chicken ceca (0-7 weeks old) were used to measure 3-O-methyl-D-glucose accumulation.
    • Isolated enterocytes from 5-7 week old chickens were used to assess alpha-methyl-D-glucoside uptake.

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  • Kinetic studies (Km, Vm) were performed on proximal cecal tissue.

    • Main Results:

    • All cecal segments showed phloridzin-sensitive hexose accumulation in 0-day-old chicks, with higher capacity in proximal (PC) than distal (DC) regions.
    • Sugar transport ability declined with age, particularly in distal segments within 1-2 days post-hatch, while medial (MC) and proximal segments retained some capacity.
    • Proximal cecal tissue in 7-week-old chickens exhibited similar hexose accumulation to the jejunum, with altered kinetic parameters (lower Km, higher Vm) compared to younger birds.

    Conclusions:

    • The chicken cecum, especially the proximal region, plays a significant role in sugar absorption during development.
    • Cecal hexose transport capacity diminishes with age, indicating a developmental shift in nutrient absorption.
    • The findings suggest a specialized function for the cecal epithelium in handling hexoses during the early post-hatch period.