Glycoconjugate histochemistry of the rat fundic gland using <i>Griffonia simplicifolia</i> agglutinin‐II during the development

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<jats:title>Abstract</jats:title><jats:p>The development and maturation of fundic glands of Wistar rats were studied using <jats:italic>Griffonia simplicifolia</jats:italic> agglutinin‐II (GSA‐II) histochemistry at the light microscopic and electron microscopic levels.</jats:p><jats:p>In adult rats, mucous neck cells and cells intermediate between mucous neck cells and chief cells were specifically labeled with GSA‐II, whereas other fundic gland cells were virtually negative.</jats:p><jats:p>Ontogenetic studies revealed that GSA‐II positive cells appeared at the bottom of the gland by 21 days of gestation. With differentiation and aging, the elongation of the fundic gland continued, and the labeling intensity of the mucous neck cells increased by 3 weeks after birth. Cells intermediate between mucous neck cells and chief cells were discernible from 3 days after birth. Typical mucous neck cells appeared at 3 weeks after birth, when their labeling intensity with colloidal gold (CG) particles approximated that of adults. On the other hand, the reactive cell population gradually moved from the bottom toward the middle portion of the gland. Finally, the reactive cells were localized at the neck portion of the fundic gland.</jats:p><jats:p>These results suggest that GSA‐II is a valuable marker for studying mucous neck cells and both their precursor cells and their derivatives.</jats:p>

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