CIEMAT / CIBERONC scientists authors of a work published in the journal Cancers - BioInn
CIEMAT / CIBERONC scientists authors of a work published in the journal Cancers.
RAS proteins are a family of proteins responsible for transmitting the signals that cells receive from their environment to the cell nucleus, thus regulating cell growth and differentiation. It is therefore not surprising that alterations in the activity of members of this family frequently lead to the formation of tumor lesions. In fact, the RAS signaling pathway is altered in approximately half of human tumors. ERAS (from Embryonic-RAS) is a relatively little known member of this family of RAS genes that is expressed only during early embryonic development of the individual, being subsequently silenced under normal conditions. In this work, the consequences that the deregulated expression of ERAS has on the pathophysiology of the mammary gland are studied. For this, lines of mice bearing a transgene for the expression of ERAS were obtained in the basal cells of the stratified epithelia and in the myoepithelial cells of the mammary gland and other exocrine glands. These animals presented, in addition to alterations in the growth of organs and tissues with expression of the transgene, alterations in the development and functioning of the mammary gland. In addition to the appearance of tumors in various epithelial tissues, the mammary glands developed, with a high incidence, intraductal carcinomas. The histopathological study of these tumors, as well as the study of the expression of various differentiation markers, indicated the great similarity of mouse tumors caused by overexpression of ERAS with the type of human tumor called malignant adenomyoepithelioma, a relatively rare mammary tumor.
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