Resumo

CRUZ RUBIO, Shirley et al. Biological characterization of the CD66c marker and its clinical importance in acute lymphoid leukemia. Rev Cubana Hematol Inmunol Hemoter [online]. 2018, vol.34, n.3, pp. 1-12. ISSN 1561-2996.

Leukemias are a heterogeneous group of blood diseases with a diverse etiology, pathogenesis, natural history and prognosis in which a clonal proliferation may be triggered. Acute lymphoid leukemia (ALL) is one of the most common types of cancer in children, it is characterized by the infiltration of neoplastic cells from the haematopoietic system to the bone marrow, blood and other tissues. Until 30 years ago, it was considered fatal; nowadays, the five-year survival rate exceeds 70 % , which implies that most patients may heal. Nevertheless, in developing countries the situation might be different for pediatric population; it is estimated that cancer survival rate ranges between 10 and 20 % less than those children living in developed countries. One of the immunophenotype markers that has been relevant in the last few years in the diagnosis of B-ALL and the follow-up of the minimal residual disease is CD66c. This is a member of the glycoprotein family from the carcinoembryonic antigen with a cellular adhesion function that has been widely used as a tumor marker as discovered by Sven Berg in the late 1970's. This antigen has been identified as a superficial protein expressed on the granulocytes and it is also involved in several biological functions, including cellular adhesion, migration, signal transduction and regulation of gene expression. This antigen is frequently presented in several types of cancer and its overexpression is often associated with a poor response to treatment and a decrease of survival rates for patients. Several studies have evidenced that this marker is relatedwith the presence of several chromosomal abnormalities, such as: BCR-ABL, CRLF2, and hyperdiploidy, which may help in the disease prognosis.

Palavras-chave : precursor cell; lymphoblastic leukemia; flow cytometry; antigens; differentiation; Philadelphia crhromosome.

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