Search results for "Factor H"

La integración del factor humano en el ámbito técnico de la gestión de las carreteras y la seguridad vial: Un enfoque investigativo

2016

La tesis titulada “LA INTEGRACIÓN DEL FACTOR HUMANO EN EL ÁMBITO TÉCNICO DE LA GESTIÓN DE LAS CARRETERAS Y LA SEGURIDAD VIAL: UN ENFOQUE INVESTIGATIVO” tiene por objeto realizar una primera aproximación a la integración del factor humano en el ámbito técnico de la seguridad y gestión de la carretera. La investigación tiene un alcance novedoso. Y constituye un ejemplo de la necesaria aproximación y complementariedad entre disciplinas interrelacionadas unidas en un camino común el de la seguridad vial, como son la psicología y la ingeniería civil. Se tratan una serie de materias de vital importancia como los tópicos, estudios, metodologías y medidas relativas a la seguridad vial en la gestión…

Determinación de las variables de accidentalidad ferroviaria en las que interviene el factor humano: valoración del riesgo en los colectivos que son …

2013

El objetivo general de la tesis es determinar las variables de accidentalidad ferroviaria en las que interviene el factor humano y su valoración respecto los colectivos de riesgo del sistema ferroviario español. Para ello se han analizado los registros de accidentalidad del ferrocarril español, a excepción del Ferrocarril Español de Vía Estrecha (FEVE), para su descomposición en cadenas de sucesos, registrando cada uno de los sucesos en una base de datos estadística diseñada para este fin. Analizando los primeros eventos de la cadena de sucesos de los accidentes se han determinado las principales variables en las que interviene el factor humano, y mediante la base de datos de sucesos elabor…

Importance of Factors H and I for the Adherence of C3b-Coated Erythrocytes to Cells

1983

Abstract The role of cell membrane-associated human factor H for the binding of cell-bound Cab to complement receptor-carrying (CR + ) cells was investigated. Pretreatment of CR + cells with antibodies to factor H inhibited the adherence of Cab-coated red cells to human tonsil lymphocytes (TL) and peripheral blood monocytes (Mo). The Cab receptor reactivity of human polymorphonuclear leucocytes (PMN) was not influenced and the one of Raji lymphoblastoid cells only slightly influenced; iC3b and Cad receptor reactivity was in no case affected. When diisopropylfluorophosphate (DFP) in a concentration of 0.1 mM was present during pretreatment of the CR + cells with anti H, the antibodies gained…

Role of β1H for the binding of C3b-coated particles to human lymphoid and phagocytic cells

1981

Coating of EAC14oxy23b with highly purified human serum beta 1H globulin (beta 1H) led to acceleration of rosette formation with human peripheral blood lymphocytes (PBL), tonsil lymphocytes, B lymphoblastoid (Raji) cells, granulocytes and monocytes. This reaction was discernible from C3bi-dependent rosette formation. Enhancement of rosette formation of C3b cells by beta 1H was most effective at limiting amounts of C3 per EAC14oxy23b. The beta 1H effect was not due to trace contamination with C3b inactivator. beta 1H-dependent rosette formation with the various lymphoid and phagocytic cells could be suppressed by the F(ab')2 fragment of anti-beta 1H suggesting beta 1H-mediated binding of bet…

Molecular basis for factor H and FHL-1 deficiency in an Italian family

2000

Genome-wide and gene-centric analyses of circulating myeloperoxidase levels in the charge and care consortia

2013

Increased systemic levels of myeloperoxidase (MPO) are associated with the risk of coronary artery disease (CAD). To identify the genetic factors that are associated with circulating MPO levels, we carried out a genome-wide association study (GWAS) and a gene-centric analysis in subjects of European ancestry and African Americans (AAs). A locus on chromosome 1q31.1 containing the complement factor H (CFH) gene was strongly associated with serum MPO levels in 9305 subjects of European ancestry (lead SNP rs800292; P = 4.89 × 10(-41)) and in 1690 AA subjects (rs505102; P = 1.05 × 10(-8)). Gene-centric analyses in 8335 subjects of European ancestry additionally identified two rare M…

Vascular niche factor PEDF modulates Notch-dependent stemness in the adult subependymal zone.

2009

We sought to address the fundamental question of how stem cell microenvironments can regulate self-renewal. We found that Notch was active in astroglia-like neural stem cells (NSCs), but not in transit-amplifying progenitors of the murine subependymal zone, and that the level of Notch transcriptional activity correlated with self-renewal and multipotency. Moreover, dividing NSCs appeared to balance renewal with commitment via controlled segregation of Notch activity, leading to biased expression of known (Hes1) and previously unknown (Egfr) Notch target genes in daughter cells. Pigment epithelium-derived factor (PEDF) enhanced Notch-dependent transcription in cells with low Notch signaling,…

Antibody Response to Meningococcal Polysaccharides A and C in Patients with Complement Defects

1993

Patients with defects of terminal complement components are particularly exposed to the risk of developing neisserial infections and seem to respond poorly to meningococcal capsular polysaccharide (PS) C via natural immunization. The sole meningococcal PSC is. on the other hand, an excellent immunogen in normal people. Considering the great importance of vaccine prophylaxis for the prevention of meningococcal infections in patients with complement defects, it is crucial to study the antibody response to the sole meningococcal PS in these patients. We therefore analysed the levels of anti-PSA and PSC antibodies in the members of four families including patients with homozygous and heterozygo…

Computational methodologies applied to Protein-Protein Interactions for molecular insights in Medicinal Chemistry

2021

In living systems, proteins usually team up into “molecular machinery” implementing several protein-to-protein physical contacts – or protein-protein interactions (PPIs) – to exert biological effects at both cellular and systems levels. Deregulations of protein-protein contacts have been associated with a huge number of diseases in a wide range of medical areas, such as oncology, cancer immunotherapy, infectious diseases, neurological disorders, heart failure, inflammation and oxidative stress. PPIs are very complex and usually characterised by specific shape, size and complementarity. The protein interfaces are generally large, broad and shallow, and frequently protein-protein contacts are…

Combined homozygous factor H and heterozygous C2 deficiency in an Italian family

1988

Three of four children in a family have homozygous (less than 1% of normal) deficiency of factor H of the complement system and both parents, who are first cousins, are heterozygous for the same defect. The father and two of the H-deficient siblings also have a partial C2 deficiency. One of the children with combined deficiencies is affected by systemic lupus erythematosus with nephritis. No increased susceptibility to infections has been observed in the family. H deficiency is inherited in an autosomal codominant manner and is independently transmitted from C2 deficiency and HLA haplotypes. In the homozygous state it is associated with very low serum concentrations of B and C3, barely demo…