Although these modifications are subtle, we cannot rule out that they may have an effect if the mammary gland susceptibility to carcinogenesis, since TEB are the most susceptible epithelial structures to malignant transformation [ 23] and prevention of chemically-induced mammary carcinomas is accompanied by inhibition of cell proliferation [ 13, 14].
The very high serum levels of oestrogens and progesterone during pregnancy stimulate growth of the mammary epithelium and also promote the differentiation of epithelial tissue, reducing the number of epithelial structures most vulnerable to malignant transformation [ 14].
During all that time, the lung undergoes alveolarization and continued morphogenesis with a differentiation of most critical cell types and epithelial structures.
Cytosol and mitochondria of most epithelial cells exhibited a strong signal, while other cellular structures, such as nuclei, brush border, enteroendocrine cells and the mucus granules of goblet cells appeared dark.
By contrast most cases of Wilms' tumours showed GST pi in both epithelial structures and undifferentiated blastema.
This review primarily focuses on epithelial structures which are the fundamental building blocks for most metazoan tissues, used as the archetypal model to study cellular polarity.
Most body muscles develop from the paraxial mesoderm through intermediate pseudostratified epithelial structures called somites.
The cadherin family is a group of Ca2+-dependent cell cell adhesion molecules, which are essential for the induction and maintenance of tissue structures (Takeichi, 1991; Nagar et al, 1996) E-cadherin is present in most epithelial cells and plays an important role in the organisation of the epithelial junctional complex.
Eccrine sweat glands are skin-associated epithelial structures (appendages) that are unique to some primates including humans and are absent in the skin of most laboratory animals including rodents, rabbits, and pigs.
This paper summarizes quantitative in vivo laminin immunofluorescence analysis of mammary glands and skin epithelial structures from mice exposed to 1 GeV/amu Fe ions.
