Dermatosis en niños diabéticos en la provincia de Matanzas. Año 2007

 La Diabetes mellitus constituye un problema de salud a nivel mundial y la Diabetes en menores de 15 años ha tenido un incremento en los últimos tiempos. En Cuba y en la provincia de Matanzas se ha observado similar situación. La atención integral al paciente diabético en edad pediátrica se lleva a cabo por el servicio de Endocrinología del Hospital Pediátrico Eliseo Noel Caamaño y hasta el momento, a pesar de la revisión bibliográfica realizada, se ha constatado que ni en el país ni fuera de éste, se ha efectuado una evaluación de dichos pacientes desde el punto de vista dermatológico, lo que constituye lo novedoso de esta investigación. Por esta razón se realizó un estudio prospectivo- descriptivo de todos los enfermos, en edades comprendidas entre 0 y 15 años, con diagnóstico de Diabetes mellitus  con el objetivo de definir  la presencia de enfermedades dermatológicas y determinar la evolución de éstas teniendo en cuenta el control metabólico. Se encontró que las afecciones predominantes fueron las infecciones micóticas, bacterianas y el Acné Juvenil y no se estableció relación entre el control metabólico y la evolución de las enfermedades dermatológicas halladas en el estudio. Se recomendó realizar esta investigación en casos y controles así como incorporar el tema del cuidado de la piel en la educación de estos pacientes

Discovery of novel trichomonacidals using LDA-driven QSAR models and bond-based bilinear indices as molecular descriptors

Few years ago, the World Health Organization estimated the number of adults with trichomoniasis at 170 million worldwide, more than the combined numbers for gonorrhea, syphilis, and chlamydia. To combat this sexually transmitted disease, Metronidazole (MTZ) has emerged, since 1959, as a powerful drug for the systematic treatment of infected patients. However, increasing resistance to MTZ, adverse effects associated to high-dose MTZ therapies and very expensive conventional technologies related to the development of new trichomonacidals necessitate novel computational methods that shorten the drug discovery pipeline. Therefore, bond-based bilinear indices, new 2-D bond-based TOMOCOMD-CARDD Molecular Descriptors (MDs), and Linear Discriminant Analysis (LDA) are combined to discover novel antitrichomonal agents. Generated models, using non-stochastic and stochastic indices, are able to classify correctly the 90.11% (93.75%) and the 87.92% (87.50%) of chemicals in the training (test) sets, respectively. In addition, they show large Matthews' correlation coefficients (C) of 0.80 (0.86) and 0.76 (0.71) for the training (test) sets, respectively. The result of predictions on the 10% full-out cross-validation test also evidences the quality of both models. In order to test the models' predictive power, 12 compounds, already proved against Trichomonas vaginalis (Tv), are screened in a simulated virtual screening experiment. As a result, they correctly classified 9 out of 12 (75.00%) and 10 out of 12 (83.33%) of the chemicals, respectively, which were the most important criteria to validate the models. Finally, in order to prove the reach of TOMOCOMD-CARDD approach and to discover new trichomonacidals, these classification functions were applied to a set of eight chemicals which, in turn, were synthesized and tested toward in vitro activity against Tv. As a result, experimental observations confirm theoretical predictions to a great extent, since it is gained a correct classification of 87.50% (7/8) of chemicals. Biological tests also show several candidates as antitrichomonals, since almost all the compounds [VAM2-(3-8)] exhibit pronounced cytocidal activities of 100% at the concentration of 100 mg/mL and at 24 h (48 h) but VAM2-2: 99.37% (100%), and it is remarkable that these compounds do not show toxic activity in macrophage assays at this concentration. The Quantitative Structure-Activity Relationship (QSAR) models presented here could significantly reduce the number of synthesized and tested compounds as well as could act as virtual shortcuts to new chemical entities with trichomonacidal activity. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.Peer Reviewe