rearreglos de genes de cadenas pesadas de las inmunoglobulinas en las gammapatías monoclonales immunoglobulin heavy chain gene rearrangements in the monoclonal gammopathies
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2005
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Abstract
Las neoplasias de células plasmáticas resultan de la expansión de un clon de células B que secreta inmunoglobulinas, conocido como componente monoclonal o componente M. Las neoplasias malignas incluyen al mieloma múltiple y la macroglobulinemia de Waldenström, y la condición premaligna comprende las gammapatías monoclonales de significado incierto (MGUS). El MGUS presenta un componente monoclonal sin evidencia de mieloma múltiple, macroglobulinemia de Waldenström, amiloidosis primaria u otros desórdenes. El diagnóstico se basa en la combinación de características patológicas, radiológicas y clínicas. Aproximadamente el 25% de las gammapatías monoclonales de significado incierto desarrollarán mieloma múltiple, amiloidosis sistémica, macroglobulinemia o enfermedades linfoproliferativas malignas, indicando que sería una condición premielomatosa. El objetivo del presente trabajo es establecer la utilidad clínica de la inmunofenotipificación por citometría de flujo (CF) y la detección de clonalidad por biología molecular. Se estudiaron 32 pacientes, siete con diagnóstico de mieloma múltiple y veinticinco con gammapatía monoclonal en estudio, los cuales fueron divididos en cuatro grupos basados en los datos clínicos y los resultados de CF. En el grupo de pacientes con CF no diagnóstica, se realizó la detección de los rearreglos de los genes de las cadenas pesadas de las inmunoglobulinas mediante reacción en cadena de la polimerasa (PCR), detectándose monoclonalidad en el 59% de los casos. El estudio de los rearreglos de los genes de las cadenas pesadas de las IgH mediante PCR incrementa la sensibilidad de detección de monoclonalidad.
Plasma cell neoplasia occurs as a result of the expansion of an immunoglobulin-secreting B-cells clones, known as monoclonal component or M component. Malignant neoplasias include multiple myeloma and Waldenström macroglobulinemia, while premalignant conditions comprise monoclonal gammopathies of unknown significance (MGUS). MGUS present a monoclonal component with no signs of multiple myeloma, Waldenström macroglobulinemia, primary amyloidosis or other disorders. Pathological, radiological and clinical features are required for the diagnosis. Approximately 25% of patients with MGUS will become multiple myeloma, primary amiloidosis, macroglobulinemia, or other lymphoproliferative disease, which would be a premyelomatous condition. The objective of this study was to determine the clinical implications of immunophenotyping by flow cytometry and of the detection of clonality by molecular biology. A total of 32 patients were studied. Seven of them were diagnosed with multiple myeloma, and 25 with monoclonal gammopathy under study. These 32 patients were divided into four groups, based on their clinical data and flow cytometry outcome. In patients with non-diagnostic flow cytometry detection of immunoglobulin heavy chain gene rearrangements by PCR was performed, and monoclonality was found in 59% of the cases. The study of immunoglobulin heavy chain gene rearrangements by molecular biology allows a more sensitive detection of clonality.
Plasma cell neoplasia occurs as a result of the expansion of an immunoglobulin-secreting B-cells clones, known as monoclonal component or M component. Malignant neoplasias include multiple myeloma and Waldenström macroglobulinemia, while premalignant conditions comprise monoclonal gammopathies of unknown significance (MGUS). MGUS present a monoclonal component with no signs of multiple myeloma, Waldenström macroglobulinemia, primary amyloidosis or other disorders. Pathological, radiological and clinical features are required for the diagnosis. Approximately 25% of patients with MGUS will become multiple myeloma, primary amiloidosis, macroglobulinemia, or other lymphoproliferative disease, which would be a premyelomatous condition. The objective of this study was to determine the clinical implications of immunophenotyping by flow cytometry and of the detection of clonality by molecular biology. A total of 32 patients were studied. Seven of them were diagnosed with multiple myeloma, and 25 with monoclonal gammopathy under study. These 32 patients were divided into four groups, based on their clinical data and flow cytometry outcome. In patients with non-diagnostic flow cytometry detection of immunoglobulin heavy chain gene rearrangements by PCR was performed, and monoclonality was found in 59% of the cases. The study of immunoglobulin heavy chain gene rearrangements by molecular biology allows a more sensitive detection of clonality.
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| Authors | ;Andrea Bosaleh;Valeria Denninghoff;Alejandro García;Carla Rescia;Alejandra Avagnina;Boris Elsner |
| Journal | proceedings on: 2016 ieee central america and panama student conference, conescapan 2016 |
| Year | 2005 |
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