The structure of microvilli of intestinal epithelial cells was investigated in 70 children: 34 with celiac disease in remission, 28 with transient gluten enteropathy after a gluten-free diet, and eight controls. Transmission electron microscopy was used to determine the mean thickness of the glycocalyx layer covering the microvilli, the mean length and width of microvilli, and the number of microvilli per 1 micron length of enterocyte surface. The structure of the glycocalyx was found to be intact, but in some children with treated celiac disease the layer of glycocalyx was either thin or absent on the surface of individual cell microvilli. In children with treated celiac disease, microvilli were statistically significantly shorter than those in children with transient gluten enteropathy and controls. Microvillous width in treated celiac disease was greater as compared with that in controls. There was no difference in the number of microvilli on the enterocyte surface in the three groups.
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