Results: 15

Studies on the enzymatic specificity of diguanylate cyclases domains and the production of new second messengers

In the first chapter, studies on substrate recognition and enzymatic activity of GGDEF domains are presented. Many proteins containing GGDEF domains are diguanylate cyclases (DGCs, EC 2.7.7.65), enzymes that catalyze the conversion of 2 GTP molecules into the second messenger c-di-GMP in prokaryotes. Thi...

Estructura genética de cepas de Mycobacterium tuberculosis farmacorresistentes en Perú con base en haplotipos obtenidos de un ensayo de sonda lineal

RESUMEN Objetivo. Determinar la estructura genética de las cepas drogorresistentes de Mycobacterium tuberculosis que circularon en todo el Perú durante los años 2011-2015 a través de haplotipos obtenidos de un ensayo con sondas en línea. Materiales y métodos. Se analizaron 6589 muestras que ingr...

Mutação de novo no gene DEAF1 e sua relação com o autismo: estudo de caso

REVISA (Online); 10 (2), 2021
Objetivo: Analisar as implicações, impactos e o desenvolvimento de um indivíduo diagnosticado com TEA e portador da mutação de novo no gene DEAF1, a partir das várias perspectivas de intervenções realizadas. Método: Trata-se de um estudo descritivo com histórico dos tratamentos, resultados labo...

Displasia ectodérmica hipohidrótica ligada al cromosoma X de novo por variante recurrente en un paciente mexicano

Resumen Introducción: Las displasias ectodérmicas son un grupo de genodermatosis que se caracterizan por distrofia de las estructuras derivadas del ectodermo. De ellas, la variedad más común es la hipohidrótica, con una incidencia de 7/100,000 nacidos vivos observada en todos los grupos étnicos. L...

A comprehensive analysis of the angiogenesis-related genes in glioblastoma multiforme vs. brain lower grade glioma

Arq. neuropsiquiatr; 78 (1), 2020
Abstract Brain tumors are one of the most common causes of cancer-related deaths around the world. Angiogenesis is critical in high-grade malignant gliomas, such as glioblastoma multiforme. Objective: The aim of this study is to comparatively analyze the angiogenesis-related genes, namely VEGFA, VEGFB,...

Genetic approach in amyotrophic lateral sclerosis

Gac. méd. Méx; 155 (5), 2019
The superoxide dismutase type 1 (SOD1) gene is the first responsible gene mapped in amyotrophic lateral sclerosis type 1 (ALS1), and it codes for the enzyme SOD1, the function of which is to protect against damage mediated by free radicals deriving from oxygen. Its pathophysiological mechanism in ALS1 is...

Mutaciones del gen ARN ribosómico 23S de Helicobacter pylori asociadas con resistencia a claritromicina en pacientes atendidos en una unidad de endoscopia de Medellín, Colombia

Biomédica (Bogotá); 39 (supl.2), 2019
Resumen Introducción. La claritromicina es el antibiótico de primera línea para el tratamiento de la infección por Helicobacter pylori. La resistencia bacteriana se produce principalmente por mutaciones puntuales del gen ARN ribosómico 23S (ARNr 23S). Objetivo. Determinar la frecuencia de las muta...

Usefulness of rapid urease test samples for molecular analysis of clarithromycin resistance in Helicobacter pylori

Rev. argent. microbiol; 50 (4), 2018
Helicobacter pylori is a gastric pathogen that is widely recognized as a causative agent of gastric disease. Its eradication is variable, mainly due to increased resistance to clarithromycin. Our objective was: to evaluate (i) if the biopsy specimen used for the rapid urease test is a useful sample to de...

A study of community-acquired Mycoplasma pneumoniae in Yantai, China

Colomb. med; 49 (2), 2018
Abstract Introduction: Community-acquired pneumonia (CAP) is a global disease responsible for a large number of deaths, with significant economic impact. As diagnostic tools have increased in sensitivity, understanding of the etiology of CAP has begun to change. Mycoplasma pneumoniae is one of the majo...

Importance of the putative furin recognition site 742RNRR745 for antiangiogenic Sema3C activity in vitro

Braz. j. med. biol. res; 51 (11), 2018
Angiogenesis is one of the key processes in the growth and development of tumors. Class-3 semaphorins (Sema3) are characterized as axon guidance factors involved in tumor angiogenesis by interacting with the vascular endothelial growth factor signaling pathway. Sema3 proteins convey their regulatory sign...