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1.
PLoS One ; 9(3): e92257, 2014.
Article in English | MEDLINE | ID: mdl-24663330

ABSTRACT

The genome of the lactic acid bacterium Lactobacillus plantarum WCFS1 reveals the presence of a rich repertoire of esterases and lipases highlighting their important role in cellular metabolism. Among them is the carboxylesterase LpEst1 a bacterial enzyme related to the mammalian hormone-sensitive lipase, which is known to play a central role in energy homeostasis. In this study, the crystal structure of LpEst1 has been determined at 2.05 Å resolution; it exhibits an αß-hydrolase fold, consisting of a central ß-sheet surrounded by α-helices, endowed with novel topological features. The structure reveals a dimeric assembly not comparable with any other enzyme from the bacterial hormone-sensitive lipase family, probably echoing the specific structural features of the participating subunits. Biophysical studies including analytical gel filtration and ultracentrifugation support the dimeric nature of LpEst1. Structural and mutational analyses of the substrate-binding pocket and active site together with biochemical studies provided insights for understanding the substrate profile of LpEst1 and suggested for the first time the conserved Asp173, which is adjacent to the nucleophile, as a key element in the stabilization of the loop where the oxyanion hole resides.


Subject(s)
Esterases/chemistry , Esterases/metabolism , Lactobacillus plantarum/enzymology , Amino Acid Sequence , Catalytic Domain , Crystallography, X-Ray , Models, Molecular , Molecular Sequence Data , Protein Multimerization , Protein Structure, Quaternary , Thermodynamics
2.
Cochabamba; s.n; dic. 2011. 126 p. graf.
Thesis in Spanish | LIBOCS, LILACS, LIBOE | ID: biblio-1296153

ABSTRACT

La elevada frecuencia de consultas prenatales por adolescentes motiaron la realización de una investigación sobre los conocimientos y uso de métodos de planificación familiar por los adolescentes en el Hospital Maternológico Germán Urquidi.El estudio fue abordado con un enfoque cuantitativo, de tipo descriptivo, transversal y prospectivo, con una muestra de 116 adolescentes que corresponden al total de los que solicitan asistencia durante el mes de junio, el instrumento utilizado fue un cuestionario que permitió conocer y cuantificar el grado de conocimiento sobre los diferentes métodos de planificación familiar.Los resultados más significativos reflejan que, si bien el 88% mencionó haber recibido información sobre el tema, los conocimientos medidos son malos o regulares en un 91%, los métodos utilizados comprenden a los modernos, entre los que resalta el condón que fue mencionado por un 55% de la población.La procedencia de la población es de predominio urbano, el inicio de la relación sexual activa en la mayoría fue en la adolescencia media.También se evidenció escasa participación de los padres en la educación sexual de sus hijos, siendo las fuentes de información los profesores para el 24% de la población, lo cual llama a reflexión sobre el rol del educador en valores de respeto, dignidad y responsabilidad


Subject(s)
Adolescent , Bolivia , Health Education , Family Development Planning , Adolescent Health
3.
Bol Asoc Med P R ; 99(1): 40-3, 2007.
Article in English | MEDLINE | ID: mdl-17616045

ABSTRACT

Stent placement in the patent ductus arteriosus (PDA) is becoming an alternative treatment to improve cardiac function and quality of life in patients with ductal dependent cardiac conditions. Although, today most of these cardiac defects can be surgically corrected without the need of maintaining PDA patency for a long period of time, some countries lack the resources, and in other cases, surgical intervention is preferably delayed due to medical reasons. This report presents 2 cases where stents were placed in the PDA.


Subject(s)
Ductus Arteriosus, Patent/therapy , Stents , Female , Follow-Up Studies , Humans , Infant , Time Factors , Vascular Patency
4.
Bol. Asoc. Méd. P. R ; Bol. Asoc. Méd. P. R;99(1): 40-43, jan.-mar. 2007.
Article in English | LILACS | ID: lil-471880

ABSTRACT

Stent placement in the patent ductus arteriosus (PDA) is becoming an alternative treatment to improve cardiac function and quality of life in patients with ductal dependent cardiac conditions. Although, today most of these cardiac defects can be surgically corrected without the need of maintaining PDA patency for a long period of time, some countries lack the resources, and in other cases, surgical intervention is preferably delayed due to medical reasons. This report presents 2 cases where stents were placed in the PDA.


Subject(s)
Humans , Female , Infant , Ductus Arteriosus, Patent , Stents , Vascular Patency , Follow-Up Studies , Time Factors
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