Цитомегаловирусная инфекция и врожденная патология сердца у детей

Congenital heart defects account for about 30% of all anomaly of development in children. Cytomegalovirus infection suffered by a woman during pregnancy claims one of the leading places among teratogenic factors.Aim: to study clinical and pathogenetic features of congenital heart diseases in children with active cytomegalovirus infection.Materials and methods: the survey included 240 children with congenital heart defects under 1 years old. The diagnosis was verified by enzyme immunoassay with detection of immunoglobulins of classes M and G to cytomegalovirus and by polymerase chain reaction, the material for which was blood and urine.Results. For congenital heart defects with the active forms of cytomegalovirus infection is characterized by a higher frequency of combined defects and the development of critical states. Children with cytomegalovirus infection in 40% suffered intrauterine myocarditis of cytomegalovirus etiology, which weighed the course of the underlying disease. The features characteristic of IUI was determined much more often (in the analysis of the noncardiac symptoms). Specific therapy of active forms of cytomegalovirus infection in children before surgery for correction of congenital heart defects has reduced the likelihood of postoperative complications.Summary. Cytomegalovirus infection has a direct teratogenic effect and can provoke the development of congenital heart defects. In addition, the virus has a cardiotropic and immune-mediated effect on the myocardium. This leads to the development of intrauterine myocarditis, which aggravates the course of the disease. The specific treatment of active forms of cytomegalovirus infection in children before surgery for the correction of congenital heart defects, reduces the likelihood of postoperative complications.Врожденные пороки сердца составляют около 30% от всех аномалий развития у детей. Среди тератогенной группы причин на одно из ведущих мест претендует цитомегаловирусная инфекция, перенесенная женщиной во время беременности.Цель: изучить клинико-патогенетические особенности врожденных пороков сердца у детей с активной цитомегаловирусной инфекцией.Материалы и методы: обследовано 240 детей в возрасте до 1 года с врожденными пороками сердца. Верификацию цитомегаловирусной инфекции проводили методом иммуноферментного анализа с обнаружением иммуноглобулинов классов М и G к цитомегаловирусу и методом полимеразной цепной реакции, материалом для которой служили кровь, моча.Результаты. Для врожденных пороков сердца на фоне активных форм цитомегаловирусной инфекции характерна более высокая частота комбинированных пороков, развития критических состояний. У 40% детей с цитомегаловирусной инфекцией отмечался внутриутробный миокардит цитомегаловирусной этиологии, что утяжеляло течение основного заболевания. При анализе экстракардиальных симптомов значительно чаще определялись признаки, характерные для врожденных инфекций. Проведение специфической терапии активных форм цитомегаловирусной инфекции у детей перед оперативным вмешательством по поводу коррекции врожденных пороков сердца позволило снизить вероятность развития постоперационных осложнений. Заключение. Цитомегаловирусная инфекция, обладая прямым тератогенным действием, может сама спровоцировать развитие врожденных пороков сердца. Кроме того, способность вируса оказывать кардиотропное и иммуноопосредованное воздействие на миокард с развитием внутриутробного миокардита утяжеляет течение заболевания. Проведение специфической терапии активных форм цитомегаловирусной инфекции у детей перед оперативным вмешательством по поводу коррекции врожденных пороков сердца позволяет снизить вероятность развития постоперационных осложнений

Grafted ionomer complexes and their effect on protein adsorption on silica and polysulfone surfaces

We have studied the formation and the stability of ionomer complexes from grafted copolymers (GICs) in solution and the influence of GIC coatings on the adsorption of the proteins β-lactoglobulin (β-lac), bovine serum albumin (BSA), and lysozyme (Lsz) on silica and polysulfone. The GICs consist of the grafted copolymer PAA28-co-PAPEO22 {poly(acrylic acid)-co-poly[acrylate methoxy poly(ethylene oxide)]} with negatively charged AA and neutral APEO groups, and the positively charged homopolymers: P2MVPI43 [poly(N-methyl 2-vinyl pyridinium iodide)] and PAH∙HCl160 [poly(allylamine hydrochloride)]. In solution, these aggregates are characterized by means of dynamic and static light scattering. They appear to be assemblies with hydrodynamic radii of 8 nm (GIC-PAPEO22/P2MVPI43) and 22 nm (GIC-PAPEO22/PAH∙HCl160), respectively. The GICs partly disintegrate in solution at salt concentrations above 10 mM NaCl. Adsorption of GICs and proteins has been studied with fixed angle optical reflectometry at salt concentrations ranging from 1 to 50 mM NaCl. Adsorption of GICs results in high density PEO side chains on the surface. Higher densities were obtained for GICs consisting of PAH∙HCl160 (1.6 ÷ 1.9 chains/nm2) than of P2MVPI43 (0.6 ÷ 1.5 chains/nm2). Both GIC coatings strongly suppress adsorption of all proteins on silica (>90%); however, reduction of protein adsorption on polysulfone depends on the composition of the coating and the type of protein. We observed a moderate reduction of β-lac and Lsz adsorption (>60%). Adsorption of BSA on the GIC-PAPEO22/P2MVPI43 coating is moderately reduced, but on the GIC-PAPEO22/PAH∙HCl160 coating it is enhanced

Antifriction and Antiwear Properties of an Ionic Liquid with Fluorine-Containing Anion Used as Lubricant Additive.

Tribological behavior of trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl) imide [P66614][NTf2] ionic liquid (IL) used as additive in a diester oil at concentrations of 0.25, 0.5 and 1 wt% was studied in this research. The IL solubility in the base oil was measured using the inductively coupled plasma mass spectrometry (ICP-MS) technique, and corrosion analysis was done at room temperature at relative humidity of 49–77%. Tribological tests were conducted for 30 min at room temperature, 15 Hz frequency, 4 mm of stroke length, a load of 80 N (corresponding to 2 GPa of maximum contact pressure) and relative humidity of 35–53%. Friction coefficient was recorded during tests, and the wear scar was measured by confocal microscopy. Worn surface was also analyzed by SEM, EDS and XPS. Results showed that a saturated solution of [P66614][NTf2] in the base oil contains about 30 wt% of IL and corrosion activity for the highest concentration of IL (1 wt%) was not found after a 20-day test. Although the base oil and the mixtures had similar friction behavior, only the 1 wt% sample exhibited slightly lower wear volume than the base oil. SEM images exhibited similar wear track width (707–796 µm) and wear mechanism (adhesive) for all samples tested. In addition, the EDS spectra only showed the elements present in the steel. Finally, the XPS measurements could not detect differences regarding iron chemical state among the samples, which is consistent with the tribological behavior obtained

Cytomegalovirus infection and congenital heart disease in children

Congenital heart defects account for about 30% of all anomaly of development in children. Cytomegalovirus infection suffered by a woman during pregnancy claims one of the leading places among teratogenic factors.Aim: to study clinical and pathogenetic features of congenital heart diseases in children with active cytomegalovirus infection.Materials and methods: the survey included 240 children with congenital heart defects under 1 years old. The diagnosis was verified by enzyme immunoassay with detection of immunoglobulins of classes M and G to cytomegalovirus and by polymerase chain reaction, the material for which was blood and urine.Results. For congenital heart defects with the active forms of cytomegalovirus infection is characterized by a higher frequency of combined defects and the development of critical states. Children with cytomegalovirus infection in 40% suffered intrauterine myocarditis of cytomegalovirus etiology, which weighed the course of the underlying disease. The features characteristic of IUI was determined much more often (in the analysis of the noncardiac symptoms). Specific therapy of active forms of cytomegalovirus infection in children before surgery for correction of congenital heart defects has reduced the likelihood of postoperative complications.Summary. Cytomegalovirus infection has a direct teratogenic effect and can provoke the development of congenital heart defects. In addition, the virus has a cardiotropic and immune-mediated effect on the myocardium. This leads to the development of intrauterine myocarditis, which aggravates the course of the disease. The specific treatment of active forms of cytomegalovirus infection in children before surgery for the correction of congenital heart defects, reduces the likelihood of postoperative complications