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1.
J Mol Graph Model ; 50: 142-51, 2014 May.
Article in English | MEDLINE | ID: mdl-24793055

ABSTRACT

Targeting the BCL6 protein is a promising therapeutic strategy for the treatment of B cell lymphomas. One approach to treat these diseases consists of finding drug candidates able to disrupt the interactions established between BCL6 and its corepressors. Thus, this work presents a thorough comparative analysis of the interactions between the BCL6 BTB (bric-a-brac tramtrack broad complex) protein domain and its SMRT, NcoR and BCOR corepressor BBDs (BCL6 binding domain) through molecular dynamics. Moreover, a theoretical structure is presented and checked for the BCL6(BTB)-NcoR(BBD) complex. Considering the BBDs to be composed of 17 amino acids, our analyses show the region involving residues 4-15 of these 17 to play a main role in the protein-corepressor interactions. Particularly SER(11) seems to have a high relevance as it establishes specific bonds with BCL6(BTB) and is one of the only two residues sequence equivalent for the three studied corepressors. From this study, 14 pharmacophoric points have been proposed divided in two groups which coincide with residues 4-11 and 11-15, being SER(11) a hinge point. This finding suggests the possibility of searching for 2 small molecule inhibitors, mimicking 8 and 7 pharmacophoric points, respectively, which could incorporate a hydrogen donor pharmacophoric point mimicking SER(11) in any or both molecules. In short, the present work aims to contribute further knowledge in the modeling of drugs mimicking BCL6(BTB)-corepressor complexes.


Subject(s)
Co-Repressor Proteins/chemistry , Co-Repressor Proteins/metabolism , Molecular Dynamics Simulation , Nuclear Receptor Co-Repressor 2/chemistry , Nuclear Receptor Co-Repressor 2/metabolism , Proto-Oncogene Proteins/chemistry , Proto-Oncogene Proteins/metabolism , Repressor Proteins/chemistry , Repressor Proteins/metabolism , Humans , Protein Binding
2.
Curr Med Chem ; 18(9): 1325-38, 2011.
Article in English | MEDLINE | ID: mdl-21366531

ABSTRACT

Tuberculosis remains a major infectious disease to humans. It accounts for approximately 8-9 million new cases worldwide and an estimated 1.6 million deaths annually. Effective treatments for tuberculosis consist of a combination of several drugs administered over long periods of time. Since Mycobacterium tuberculosis often acquires multiple drug resistant mechanisms, development of new drugs with innovative actions is urgently required. The 2C-methyl-D-erythritol 4-phosphate (MEP) pathway, in charge of the essential biosynthesis of isoprenoids, represents a promising and selective target for developing new drugs against tuberculosis. To date, only fosmidomycin, a molecule that targets the second enzyme of the MEP pathway, has reached clinical trials but recent advances elucidating the structure and kinetics of the MEP enzymes are likely to change this scenario. This review describes the structure, mechanism of action and inhibitors of the seven enzymes of the MEP pathway, with special attention to the reported studies in M. tuberculosis.


Subject(s)
Erythritol/analogs & derivatives , Sugar Phosphates/metabolism , Terpenes/metabolism , Tuberculosis/drug therapy , Aldose-Ketose Isomerases/antagonists & inhibitors , Aldose-Ketose Isomerases/metabolism , Antitubercular Agents/chemistry , Antitubercular Agents/pharmacology , Antitubercular Agents/therapeutic use , Bacterial Proteins/antagonists & inhibitors , Bacterial Proteins/metabolism , Enzyme Inhibitors/chemistry , Enzyme Inhibitors/therapeutic use , Enzymes/chemistry , Enzymes/metabolism , Erythritol/metabolism , Escherichia coli Proteins/antagonists & inhibitors , Escherichia coli Proteins/metabolism , Humans , Multienzyme Complexes/antagonists & inhibitors , Multienzyme Complexes/metabolism , Mycobacterium tuberculosis/enzymology , Mycobacterium tuberculosis/metabolism , Oxidoreductases/antagonists & inhibitors , Oxidoreductases/metabolism , Transferases/antagonists & inhibitors , Transferases/metabolism
3.
Article in Es | IBECS | ID: ibc-37159

ABSTRACT

Se estudia el significado pronóstico de los patrones radiológicos de las lesiones no palpables de la mama. Se analiza de forma retrospectiva un grupo de 263 pacientes clínicamente asintomáticas, diagnosticadas mediante mamografía de lesión radiológicamente sospechosa. Se describen cuatro patrones radiológicos y se relacionan con el resultado de la biopsia. La incidencia de cáncer en los patrones cálcico, nodular, nodular estrellado y distorsionante fue de 36/132 (27,3 por ciento), 6/41 (14,6 por ciento), 33/48 (68,7 por ciento) y 4/15 (26,7 por ciento), respectivamente. La incidencia en el grupo de mujeres premenopáusicas y posmenopáusicas de estos patrones fue la siguiente: nodular, del 7 por ciento frente al 22 por ciento; nodular estrellado, del 13 por ciento frente al 22 por ciento; cálcico, del 66 por ciento frente al 41 por ciento, y distorsionante, del 7 por ciento frente al 5 por ciento. El patrón radiológico de peor pronóstico fue el nodular estrellado, seguido del cálcico. Tanto en las mujeres premenopáusicas como en las posmenopáusicas los patrones más frecuentes fueron el cálcico, seguido del nodular estrellado (AU)


Subject(s)
Adult , Aged , Female , Middle Aged , Humans , Palpation , Breast Neoplasms , Mammography , Biopsy/methods , Age Distribution , Fibrocystic Breast Disease/pathology , Breast Neoplasms/epidemiology
4.
Cienc. ginecol ; 6(1): 27-30, ene. 2002.
Article in Es | IBECS | ID: ibc-14247

ABSTRACT

El cáncer de vagina es el cáncer ginecológico que presenta una menor incidencia. Entre sus tipos histológicos el melanoma vaginal constituye una entidad extremadamente infrecuente, siendo el de peor pronóstico. Por otro lado es mucho más agresivo que los melanomas cutáneos. Sólo 17 pacientes publicadas han tenido una supervivencia superior a 5 años, de las cuales únicamente 3 sobreviven a los 10 años. El pobre pronóstico y la baja incidencia explica que no existan recomendaciones que determinen el mejor tratamiento para estas pacientes (AU)


Subject(s)
Female , Middle Aged , Humans , Melanoma/diagnosis , Vaginal Neoplasms/diagnosis , Melanoma/surgery , Vaginal Neoplasms/surgery
6.
Cienc. ginecol ; 5(4): 146-151, jul. 2001. tab
Article in Es | IBECS | ID: ibc-10834

ABSTRACT

Objetivo: Revisión crítica de nuestra experiencia en Cirugía Mayor Ambulatoria y presentación de una serie de indicadores de calidad básicos. Métodos: Estudio realizado con 689 pacientes de un total de 3710, intervenidos en la Unidad de Cirugía Mayor Ambulatoria. Un indicador de calidad evaluado fue el Índice de Ingresos. Resultados: La Histeroscopia Quirúrgica fue la intervención más frecuente. Las causas de ingresos más frecuentes fueron debidas a complicaciones específicas. El 90 por ciento de pacientes califica la experiencia como buena. Conclusiones: La Cirugía Mayor Ambulatoria es un recurso para muchas patologías quirúrgicas y ha demostrado ventajas tanto asistenciales como de gestión hospitalaria; siendo bien aceptada por la población (AU)


Subject(s)
Ambulatory Surgical Procedures/economics , Clinical Protocols , Laparoscopy/methods , Postoperative Complications
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