A gamma 3 hinge region probe: first specific human immunoglobulin subclass probe

AbstractWe report the first specific human immunoglobulin subclass probe which was obtained by subcloning the gamma 3 hinge region. This specific γ3 probe allowed us to identify with certainty the Cγ3 gene on Southern genomic blots to describe the first Cγ3 restriction fragment length polymorphism (EZZ γ3 RF) and to show that an IgG3 selective deficiency previously described serologically was not due to a deletion of the C3 gene. Such a probe should be particularly useful for screening libraries from individuals with IgG3 immunodeficiencies or presenting unusual Cγ3 genes and consequently for studying the Cγ gene evolution. ImmunoglobulinIgCH gene (Human) Gm allotypeRestriction fragment length polymorphismImmunoglobulin G3 deficiencyHing

Reflections and recommendations from the experience in Colombia

El estudio de caso presentado en el capítulo anterior tuvo como objetivo hacer visible, desde la perspectiva de género, la problemática bioética de la genética frente a la teoría de la justicia y el principio de equidad. En este estudio en particular, el principio de equidad se sitúa como el punto de referencia para sustentar el debate acerca de la igualdad, desde la dignidad humana, en asuntos específicamente relacionados con la esfera de los trastornos genéticos. De manera concreta, se quiso poner en evidencia el grado de conocimiento y la percepción social que, respecto al problema del genoma humano y los derechos fundamentales conexos, tienen las mujeres de sectores populares. Las reflexiones que se presentan a continuación están basadas en el análisis de las encuestas que respondieron dichas mujeres

PCR-heterodúplex por agrupamiento: Implementación de un método de identificación de portadores de la mutación más común causal de fibrosis quística en Colombia

"Background: Cystic fibrosis (CF) is the most frequent autosomal recessive disorder in the Caucasian population with an incidence of 1 in 2,500 newborns. More than 1,300 mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene that causes CF have been described. However, mutation F508del is the most common mutation in different populations around the world. Objective: To develop a fast, reliable and low-cost technique to screen carriers and affected individuals for the F508del mutation. This kind of analysis will have an impact on genetic counselling to decrease the incidence of new cases, in the early diagnosis and instauration of appropriate treatment to decrease morbidity and mortality associated to CF in Colombia. Methods: The reliability of the PCR-heteroduplex by grouping technique by analysis of 400 blood spot samples from asymptomatic CF patients was defined. Results: Using PCR-heteroduplex by grouping technique 100% efficiency, reproducibility and specificity and 92%sensitivity were found. Conclusions: The sensitivity and reproducibility of the PCR-heteroduplex by grouping technique up to pooling of 10 samples were demonstrated. This kind of analysis could be used in heterozygotes and affected screening programs. © 2006 Corporación Editora Médica del Valle.

PCR-heterodúplex por agrupamiento: Implementación de un método de identificación de portadores de la mutación más común causal de fibrosis quística en Colombia

Background: Cystic fibrosis (CF) is the most frequent autosomal recessive disorder in the Caucasian population with an incidence of 1 in 2,500 newborns. More than 1,300 mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene that causes CF have been described. However, mutation F508del is the most common mutation in different populations around the world. Objective: To develop a fast, reliable and low-cost technique to screen carriers and affected individuals for the F508del mutation. This kind of analysis will have an impact on genetic counselling to decrease the incidence of new cases, in the early diagnosis and instauration of appropriate treatment to decrease morbidity and mortality associated to CF in Colombia. Methods: The reliability of the PCR-heteroduplex by grouping technique by analysis of 400 blood spot samples from asymptomatic CF patients was defined. Results: Using PCR-heteroduplex by grouping technique 100% efficiency, reproducibility and specificity and 92%sensitivity were found. Conclusions: The sensitivity and reproducibility of the PCR-heteroduplex by grouping technique up to pooling of 10 samples were demonstrated. This kind of analysis could be used in heterozygotes and affected screening programs. © 2006 Corporación Editora Médica del Valle