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1.
Rev. cuba. hematol. inmunol. hemoter ; 30(1): 68-73, ene.-mar. 2014.
Article in Spanish | LILACS | ID: lil-705665

ABSTRACT

La leucemia mieloide crónica (LMC) es un trastorno clonal que generalmente se diagnostica con facilidad porque las células leucémicas en más del 95 por ciento de los pacientes presentan una anomalía citogenética característica, el cromosoma Filadelfia (Ph). El embarazo no tiene un efecto adverso sobre la enfermedad, pero esta puede comprometer potencialmente la circulación placentaria por leucoestasis, puede provocar bajo peso al nacer, nacimiento prematuro y aumento de la mortalidad. El mesilato de Imatinib se usa como terapia de primeria línea en estos pacientes pero existen numerosos reportes sobre su acción teratogénica. El interferón-á es considerado la droga de elección en el tratamiento durante el embarazo. Se describen dos pacientes con diagnóstico de LMC y embarazo tratadas con interferón-a; la primera al diagnóstico de la enfermedad y la segunda a los 3 años de tratamiento con mesilato de Imatinib, el cual suspendió un mes antes de la gestación. Los dos embarazos se desarrollaron satisfactoriamente al igual que los fetos y nacieron dos niños con buena vitalidad que actualmente están sanos y con un desarrollo psicomotor normal


Chronic myeloid leukemia (CML) is a clonal dysfunction with easy diagnosis since more than 95 percent of the leukemia cells present a citogenetic chromosome Philadelphia (Ph) anomaly. The pregnancy has no adverse effect on the illness, but the leucoestasis potentially can commit the placental circulation and cause underweight born, premature birth and the increase of mortality. The imatinib mesylate is the first line therapy for the disease but there are numerous reports about its teratogenic action. The alpha-interferon is the drug of election for treatment during pregnancy. Two patients with CML and pregnancy treated with alpha-interferon are described. The first one treated at diagnosis and the second one after 3 years of treatment with imatinib mesylate which was suspended one month before. The two pregnancies developed satisfactorily same as the fetuses and two children were born with good vitality and healthy with normal psychomotor development


Subject(s)
Humans , Female , Pregnancy , Pregnancy Complications, Hematologic/prevention & control , Interferon-alpha/therapeutic use , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/prevention & control , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
2.
Rev. cuba. hematol. inmunol. hemoter ; 28(1): 41-52, ene.-mar. 2012.
Article in Spanish | LILACS | ID: lil-628577

ABSTRACT

Se estudiaron 13 pacientes con leucemia mieloide crónica y anemia hemolítica autoinmune inducida por el interferón alfa, a quienes se les realizó la detección de inmunoproteínas y la caracterización de las subclases de IgG en los hematíes mediante la prueba de antiglobulina directa (PAD) y la técnica de microplacas. Se aplicó además un ELISA para la cuantificación de inmunoglobulinas en los hematíes. Se detectó la presencia de IgG y C3 en el 53,84 por ciento de los casos, IgG sola en el 23,07 por ciento y en el 15,38 por ciento se identificaron autoanticuerpos IgG e IgA. En 11 pacientes se demostró la presencia de IgG1 y en un caso se identificaron además autoanticuerpos de la subclase IgG3. El ELISA detectó autoanticuerpos en concentraciones de 183 moléculas de IgG por hematíe en un paciente con PAD negativa. En los pacientes con hemólisis de alto grado se encontró una concentración de autoanticuerpos entre 1 500 y 3 180 moléculas de IgG por hematíe, mientras que en los casos con hemólisis de bajo grado se comportó entre 183 y 1 000 moléculas. Se observó una correlación negativa entre las cifras de Hb y los valores de haptoglobina plasmática con el número de moléculas de IgG por hematíe y una correlación positiva entre este último con el conteo de reticulocitos


We studied 13 patients with chronic myeloid leukemia and autoimmune hemolytic anemia induced by interferon alfa. They underwent tests for immune protein detection and characterization of IgG subclasses in RBCs by direct antiglobulin test (PAD) and the microplate technique. Also they were applied ELISA test for quantifying immunoglobulins in the red blood cells. It was detected the presence of IgG and C3 in 53.84 percent of cases, IgG alone in 23.07 percent and in 15.38 percent were identified IgG and IgA autoantibodies. In 11 patients the presence of IgG1 was showed and also in one case the subclass IgG3 autoantibodies was identified. The ELISA detected antibodies at concentrations of 183 IgG molecules per erythrocyte in a patient with negative PAD. In high-grade hemolysis patients, it was found a concentration of autoantibodies between 1 500 and 3 180 molecules of IgG per erythrocyte, while in low-grade hemolysis patients it behaved between 183 and 1 000 molecules. There was a negative correlation between Hb and plasma haptoglobin values with the number of IgG molecules per erythrocyte and a positive correlation between the latter with the reticulocyte count


Subject(s)
Humans , Male , Female , Adolescent , Young Adult , Middle Aged , Anemia, Hemolytic, Autoimmune/complications , Autoantibodies/genetics , Interferon-alpha/adverse effects , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/complications , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/prevention & control , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/therapy , Case Reports
3.
Rev. bras. hematol. hemoter ; 30(supl.1): 27-31, abr. 2008. tab
Article in Portuguese | LILACS | ID: lil-496178

ABSTRACT

O mesilato de imatinibe é atualmente o tratamento de escolha para pacientes com Leucemia mielóide Crônica (LMC) recém-diagnosticados. Desde os primeiros estudos clínicos em 1998 até o estudo IRIS, que comparou o uso em primeira linha de imatinibe com interferon + ara-C, esta droga vem se consolidando em segurança e eficácia. Ainda há, entretanto questionamentos sobre a melhor dose inicial, a identificação dos pacientes que mais se beneficiariam e a melhor abordagem frente a respostas sub-ótimas e resistência. Os principais estudos clínicos publicados com mesilato de imatinibe são revisados no presente artigo, e discutidos sob a perspectiva da realidade brasileira.


Imatinib mesylate is currently the gold-standard therapy for patients with newly diagnosed Chronic Myelogenous Leukemia. From the clinical trials in 1998 to the IRIS study, which compared first line imatinib treatment with interferon and low dose ara-C, this drug has been consolidated in regards to its safety and efficacy. There are still some questions to answer. Which would be the best initial dose? Are there any patients who benefit more than others? What is the best approach to suboptimal response and resistance? The most important published clinical studies are reviewed in the current article and discussed from a Brazilian perspective.


Subject(s)
Humans , Leukemia, Myelogenous, Chronic, BCR-ABL Positive , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/prevention & control , Mesylates
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