Rodríguez-Cruz M, del Prado M, Salcedo M

Language: Spanish
References: 45
Page: 572-581
PDF size: 261.96 Kb.

ABSTRACT

In order to define the molecular and cellular bases of the development of retinoblastomas it is necessary to know its etiology, and to apply the advances in genome technology to this kind of neoplasia. Retinoblastomas are childhood tumors of the eye with an average incidence of one case in every 15,000-20,000 live births, which occur in sporadic and hereditary forms. The sporadic form appears regularly as a unilateral tumor, while in the familial form of the disease, tumors may be unilateral and bilateral. This neoplasia is characterized by leukocoria, strabism, and heterochromia. The retinoblastoma gene (RB1) is a molecular marker of retinoblastoma tumors. This gene is located in chromosome 13q14.2 and encodes a nuclear phosphoprotein (pRB) of 110 KDa, which plays a major role in cell proliferation control through cell cycle-regulated phosphorylation/dephosphorylation cycles of this protein. The RB1 gene is mainly affected by point mutations, which occur most frequently in exons 3, 8, 18 and 20. At the end of the last century, DNA technology has improved notably, allowing for its application to the study of a vast array of diseases. The aim of this work is to show the molecular aspects involved in retinoblastoma which are currently deciphering; this is possible thanks to new technology platforms that have been developed. This will allow us in a near future, to offer tests for the early diagnoses, prognoses, and the determination of individual predisposition towards this neoplasia.

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