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The research examines how age affects the intestinal uptake of fluorescent microspheres in young and aged mice.

Intestinal Uptake of Fluorescent Microspheres in Young and Aged Mice

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The research examines how age affects the intestinal uptake of fluorescent microspheres in young and aged mice.
Administered rhodamine B-labeled microspheres (1.8 micron) via gavage 5 days/week to young (24 days) and aged (18 months) mice.
Assessed particle accumulation in tissues after 25 days (19 gavages) using fluorescence microscopy.
Determined particle presence in Peyer's patches, lungs, mesenteric lymph nodes, liver, spleen, and kidney.
Aged mice showed significantly higher accumulation of fluorescent particles in Peyer's patches (exact values not provided).
Aged mice had significantly less accumulation in lungs compared to young mice (exact values not provided).
No significant differences were found in mesenteric lymph nodes and Peyer's patch-free intestinal segments between age groups.

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Randomized trial assesses fluorescent particle accumulation in intestinal tissues of young and aged mice, suggesting age impacts uptake dynamics.

LeFevre et al. (1989) studied this question.

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Randomized trial assesses fluorescent particle accumulation in intestinal tissues of young and aged mice, suggesting age impacts uptake dynamics.