EFEITO DO RALOXIFENO SOBRE A HOMOCISTEINA DEPENDE DOS NIVEIS PLASMATICOS DO AMINOACIDO

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O raloxifeno na pós-menopausa melhora o perfil lipídico e seu efeito redutor sobre a homocisteína é mais favorável nas pacientes com níveis basais elevados do aminoácido.
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Márcia neves Carvalho
Columnista Experto de SIIC
Artículos publicados por Márcia neves Carvalho
Coautores
George Dantas Azevedo* José Ernesto Santos* Rui Alberto Ferriani* Gustavo Salata Romão* Marcos Felipe Silva de Sá* 
Professor Doutor, Universidade de São Paulo, São Paulo, Brasil*
Recepción del artículo
17 de Diciembre, 2006
Aprobación
31 de Enero, 2007
Primera edición
1 de Junio, 2007
Segunda edición, ampliada y corregida
7 de Junio, 2021

Resumen
Objetivos: Avaliar os efeitos do raloxifeno sobre a concentração plasmática de homocisteína e o lipidograma em mulheres na pós-menopausa. Métodos: Foram estudadas 33 mulheres saudáveis na pós-menopausa, com idade entre 50 e 70 anos e diagnóstico de osteopenia e/ou osteoporose: 24 foram submetidas à terapia com raloxifeno, 60 mg/dia, durante seis meses e nove fizeram parte do grupo-controle. Foram dosados a homocisteína plasmática antes do início e após três e seis meses de tratamento, além do colesterol total, HDL-colesterol, LDL-colesterol e triglicérides. Resultados: Observamos redução significativa do colesterol total (227.6 ± 56.3 vs 200.6 ± 29.8 vs 192.8 ± 32.1 mg/dl; p < 0.001) e do LDL-colesterol (151.4 ± 46.3 vs 122.7 ± 29.4 vs 119.0 ± 28.6 mg/dl; p < 0.001), aumento significativo do HDL-colesterol (44.7 ± 10.8 vs 52.2 ± 12.6 vs 49.0 ± 10.8 mg/dl; p < 0.05) e nenhuma alteração significativa dos triglicérides no grupo tratado. No grupo controle não houve modificação em nenhum desses parâmetros. Embora não significativa, foi observada redução da homocisteína de 4.5% entre os períodos pré e pós-tratamento com raloxifeno, com uma correlação significativa entre os níveis basais e os percentuais de redução após o tratamento (r = 0.72; p < 0.001). Não observamos alteração significativa da homocisteina ou qualquer correlação entre a queda e os níveis basais no grupo-controle. Conclusões: A terapia com raloxifeno, 60 mg/dia, em mulheres na pós-menopausa durante seis meses, melhora o perfil lipídico e o seu efeito de redução sobre os níveis de homocisteína é mais favorável nas pacientes com níveis basais elevados do aminoácido.

Palabras clave
menopausa, doença cardiovascular, raloxifeno, homocisteína, perfil lipídico


Artículo completo

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Abstract
Objective: To evaluate the effects of raloxifene on the plasma concentration of homocysteine and on the lipid profile of postmenopausal women. Methods: Thirty-three healthy postmenopausal women aged 50 to 70 years with a diagnosis of osteopenia and/or osteoporosis were studied. Twenty-four were treated with raloxifene, 60 mg/day, for six months, and nine were used as untreated controls. Plasma homocysteine, total cholesterol, HDL-cholesterol, LDL-cholesterol and triglycerides were determined at the beginning and after three and six months of treatment. Results: We observed a significant reduction of total cholesterol (227.6 ± 56.3 vs 200.6 ± 29.8 vs 192.8 ± 32.1 mg/dl; p < 0.001) and LDL-cholesterol (151.4 ± 46.3 vs 122.7 ± 29.4 vs 119.0 ± 28.6 mg/dl; p < 0.001), a significant increase in HDL-cholesterol (44.7 ± 10.8 vs 52.2 ± 12.6 vs 49.0 ± 10.8 mg/dl; p < 0.05) and no significant change in triglycerides in the treated group. The control group showed no changes in any of these parameters. Although nonsignificant, a 4.5% reduction in homocysteine was observed between pre- and post-treatment with raloxifene, with a significant correlation between basal levels and percent reduction after treatment (r = 0.72; p < 0.001). There was no significant reduction in homocysteine or any correlation between basal and reduced levels in the control group. Conclusions: Treatment of menopausal women with raloxifene, 60 mg/day, for six months improved the lipid profile, and the effect of the drug on homocysteine levels was more favorable in patients with elevated basal levels of the amino acid.

Key words
menopause, cardiovascular disease, raloxifene, homocysteine, lipid profile


Clasificación en siicsalud
Artículos originales > Expertos de Iberoamérica >
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Especialidades
Principal: 
Relacionadas: Bioquímica, Endocrinología y Metabolismo, Farmacología, Obstetricia y Ginecología, Oncología



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Enviar correspondencia a:
Marcos Felipe Silva de Sá, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo, 14049-900, Av. Bandeirantes, 3900, Ribeirão Preto, Brasil
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