Rasgos Morfológicos y Dimensionales del Hueso Furcal en Furcopatías Grados II y III en Radiografías Periapicales de Molares Permanentes de la Consulta Privada. Arequipa 2022

Esta investigación tiene por objeto evaluar y comparar las características morfológicas y dimensionales del hueso furcal en furcopatías grados II y III en radiografías periapicales de molares permanentes de la Consulta Privada. Se trata de una investigación observacional, prospectiva, transversal y comparativa en la que las variables fueron estudiadas mediante observación radiográfica periapical en dos grupos de lesiones furcales grados II y III, cada uno constituido por 31 furcopatías por grupo. La información obtenida a través de la aplicación de una ficha de registro, fue luego procesada en una matriz de datos, y posteriormente tratada estadísticamente mediante frecuencias absolutas y porcentuales para los indicadores categóricos, y por medio de la media, desviación estándar, valores máximo y mínimo, así como el rango, para indicadores numéricos; y analizada mediante las pruebas X2 y T para dos muestras independientes. Los resultados muestran que según la prueba X2 existe diferencia estadística significativa en los rasgos morfológicos del hueso furcal entre furcopatías grados II y III. De acuerdo al contraste T, existe diferencia estadística en los rasgos dimensionales de dicha estructura entre ambos tipos de lesión furcal. Por tanto, se rechaza la hipótesis nula; y se acepta la hipótesis alterna o investigativa en rasgos morfológicos del hueso furcal de furcopatías grados II y III, así como en sus rasgos dimensionales, con un nivel de significación p < 0.05

Affinity binding of antibodies to supermacroporous cryogel adsorbents with immobilized protein A for removal of anthrax toxin protective antigen

Polymeric cryogels are efficient carriers for the immobilization of biomolecules because of their unique macroporous structure, permeability, mechanical stability and different surface chemical functionalities. The aim of the study was to demonstrate the potential use of macroporous monolithic cryogels for biotoxin removal using anthrax toxin protective antigen (PA), the central cell-binding component of the anthrax exotoxins, and covalent immobilization of monoclonal antibodies. The affinity ligand (protein A) was chemically coupled to the reactive hydroxyl and epoxy-derivatized monolithic cryogels and the binding efficiencies of protein A, monoclonal antibodies to the cryogel column were determined. Our results show differences in the binding capacity of protein A as well as monoclonal antibodies to the cryogel adsorbents caused by ligand concentrations, physical properties and morphology of surface matrices. The cytotoxicity potential of the cryogels was determined by an in vitro viability assay using V79 lung fibroblast as a model cell and the results reveal that the cryogels are non-cytotoxic. Finally, the adsorptive capacities of PA from phosphate buffered saline (PBS) were evaluated towards a non-glycosylated, plant-derived human monoclonal antibody (PANG) and a glycosylated human monoclonal antibody (Valortim®), both of which were covalently attached via protein A immobilization. Optimal binding capacities of 108 and 117 mg/g of antibody to the adsorbent were observed for PANG attached poly(acrylamide-allyl glycidyl ether) [poly(AAm-AGE)] and Valortim® attached poly(AAm-AGE) cryogels, respectively, This indicated that glycosylation status of Valortim® antibody could significantly increase (8%) its binding capacity relative to the PANG antibody on poly(AAm-AGE)-protien-A column (p < 0.05). The amounts of PA which remained in the solution after passing PA spiked PBS through PANG or Valortim bound poly(AAm-AGE) cryogel were significantly (p < 0.05) decreased relative to the amount of PA remained in the solution after passing through unmodified as well as protein A modified poly(AAm-AGE) cryogel columns, indicates efficient PA removal from spiked PBS over 60 min of circulation. The high adsorption capacity towards anthrax toxin PA of the cryogel adsorbents indicated potential application of these materials for treatment of Bacillus anthracis infection

Coinfection with HIV and hepatitis C virus in 229 children and young adults living in Europe

[Objective] To characterize children, adolescents and young adults infected with HIV/hepatitis C virus (HCV) vertically or before age of 18 years and living in Europe regarding mode of acquisition, HCV genotype, clinical status and treatment.[Design] Retrospective, cross-sectional study using pooled data from 11 European paediatric HIV cohorts.[Methods] Patients aged more than 18 months and less than 25 years, with HIV/HCV acquired vertically or in childhood, were included. Anonymized individual patient data were collected using a standard protocol and modified HIV Cohorts Data Exchange Protocol.[Results] Of 229 patients included, 142 (62%) had vertically acquired infection. Median age at last follow-up was 16.2 years. Most children had HCV genotype 1 (101/184, 55%) or 3 (57/184, 31%). One-fifth (46/214) had a previous AIDS diagnosis (data missing on prior AIDS diagnoses for 15). At their last clinic visit, 70% (145/208) had no/mild immunosuppression (Centers for Disease Control and Prevention stage 1), and 131 of 179 on antiretroviral therapy had undetectable HIV RNA (assay thresholds varied from <20 to <150 copies/ml). Overall, 42% (86/204) had hepatomegaly in the previous year, and 55% (116/213) had alanine aminotransferase more than 40 IU/l at their last test. Of 97 patients with transient elastography, 12 had results more than 9 kPa; this was associated with duration of HCV infection (P = 0.033), but not with CD4+ cell count, antiretroviral therapy use or sex in univariable analysis. Of 17 patients with liver biopsies, six had bridging fibrosis and one had cirrhosis. Twenty-five (11%) had been treated successfully for HCV.[Conclusion] The high proportion of patients with progressive liver disease underscores the need for close monitoring and earlier and more effective HCV treatment.This work was supported by funding from the EU Seventh Framework Programme (FP7/2007–2013) under EuroCoord grant agreement [no. 260694] and additional funding from Janssen.Peer reviewe