Иммуноглобулин G4-ассоциированное заболевание легких у подростка

Immunoglobulin G4-related disease is a recently recognized systemic immune-mediated condition characterized by lymphoplasmacytic infiltrate in various organs with IgG4 positive plasma cells. Isolated lung involvement is rare, difficult to diagnose and can mimic primary lung malignancy on imaging. We report the case of an isolated IgG4-related interstitial lung disease in a 16-year-old asymptomatic male adolescent with incidentally found bilateral nodular lesions by chest radiograph. The patient underwent surgical interventions for assumption of malignancy. Serum IgG4 levels was normal. Нistological examination revealed significant lymphoplasmacytic infiltrate with lymphoid follicle formation, peribronchial fibrosis, vascular obliteration. Prominent interstitial IgG4 positive plasma cell infiltrate was identified by immunohistochemistry. Isolated IgG4-related lung disease should be taken into account as a possible differential diagnosis of mass-forming lesions, even when no other organ manifestation is clinically apparent at the time of diagnosis.Выделенные недавно иммуноглобулин (Ig) G4-ассоциированные заболевания (IgG4-АЗ) представляют собой иммунозависимое состояние, которое характеризуется инфильтрацией пораженных органов IgG4 позитивными плазматическими клетками. Изолированное вовлечение легких наблюдается редко, при визуализации оно может имитировать злокачественное новообразование и представляет немалые трудности при диагностике. В приведенном клиническом наблюдении продемонстрирован случай изолированного IgG4-АЗ легких у 16-летнего подростка со случайно обнаруженными двусторонними узловыми изменениями на рентгенограмме органов грудной клетки при отсутствии симптомов. В связи с подозрением на злокачественную природу выявленных изменений у пациента выполнены хирургические вмешательства, при этом уровень IgG4 в сыворотке крови был в пределах нормы. Гистологически выявлена значительная лимфоплазмоцитарная инфильтрация с образованием лимфоидных фолликулов, перибронхиальный фиброз, облитерация сосудов. По результатам иммуногистохимического исследования показана инфильтрация интерстиция IgG4-позитивными плазматическими клетками. На основании приведенного клинического наблюдения сделан вывод, что при дифференциальной диагностике и обнаружении нодулярных образований на момент постановки диагноза изолированное IgG4-АЗ легких необходимо рассматривать даже при отсутствии клинических симптомов со стороны других органов

Muon `Depth -- Intensity' Relation Measured by LVD Underground Experiment and Cosmic-Ray Muon Spectrum at Sea Level

We present the analysis of the muon events with all muon multiplicities collected during 21804 hours of operation of the first LVD tower. The measured angular distribution of muon intensity has been converted to the `depth -- vertical intensity' relation in the depth range from 3 to 12 km w.e.. The analysis of this relation allowed to derive the power index, $\gamma$, of the primary all-nucleon spectrum: $\gamma=2.78 \pm 0.05$. The `depth -- vertical intensity' relation has been converted to standard rock and the comparison with the data of other experiments has been done. We present also the derived vertical muon spectrum at sea level.Comment: 7 pages, 3 figures, to be published on Phys. Rev.

Влияние адаптогена аскорбата лития на микробиоту рубца овец-ярок

Health and productivity of ruminants directly depend on the state of rumen and digestion in intestinal tract. Normal microflora protects the body from pathogenic microbes, stimulates the immune system, participates in metabolic reactions and plays an important role in energy metabolism. Disturbance of species composition of microflora in rumen under effect of various factors leads to a state of dysbiosis, disorders of products digestibility, changes in enzymatic processes and other disorders. Biologically active substances of an adaptogenic nature can show immunomodulatory and antimicrobial activity. Adaptogen lithium ascorbate has stress-protective, neurotrophic, neuroprotective, antioxidant, immunomodulatory properties. In this paper, using molecular genetic methods, the effect of lithium ascorbate on composition of rumen microbiota of sheep was studied for the first time.  Composition of microbiota was determined by NGS sequencing method. In total, 37 phylums, 76 classes, 98 orders, 225 families and 894 species of microorganisms were identified. It has been determined that introduction of lithium ascorbate at a dose of 10 mg/kg of body weight into the main diet of sheep contributed to increase in proportion of cellulolytic bacteria from 73.6±1.6% to 75.4±0.9% and over 40% decrease in total number of infusoria in rumen content. Cellulolytic activity of rumen fluid in sheep of the experimental group increased by 38% compared to the animals of the control group. The number of pathogenic bacteria decreased from 2.7% in sheep of the control group to 1.6% in animals of the experimental group, while the content of beneficial bacilli increased from 0.3% to 0.5%, respectively. Content of undesirable and conditionally pathogenic microflora decreased in the sheep of experimental group. The obtained data confirm positive effect of adaptogen lithium ascorbate, introduced into diet at a dosage of 10 mg/kg of body weight, on qualitative and quantitative composition of microbiota in sheep rumen. Therefore, lithium ascorbate, a broad-spectrum adaptogen, can be recommended as a feed additive to the main diet of sheep to improve rumen digestion and increase productivity.Здоровье и продуктивность жвачных животных напрямую зависят от рубцового и кишечного пищеварения. Нормальная микрофлора защищает организм от патогенных микробов, стимулирует иммунную систему, участвует в метаболических реакциях и играет важную роль в энергетическом обмене. Нарушение видового состава микрофлоры рубца под влиянием различных факторов приводит к изменению усвояемости продуктов пищеварения, изменениям ферментативных процессов и развитию прочих патологических процессов. Биологически активные вещества адаптогенной природы могут проявлять иммуномодулирующую и антимикробную активность. Адаптоген аскорбат лития обладает стресс-протекторными, нейротрофическими, нейропротекторными, антиоксидантными, иммуномодулирующими свойствами и в качестве кормовой добавки влияет на микробиоту рубца. В настоящем исследовании при использовании NGS-секвенирования впервые изучено влияние адаптогена аскорбата лития на бактериальное сообщество рубца овец-ярок романовской породы. На фоне длительного содержания овец на основном рационе в условиях вивария ВНИИФБиП нормофлора рубца не подвергалась негативным изменениям. Введение органической соли лития в состав основного рациона в дозировке 10 мг/кг живой массы способствовало усилению процессов ферментации в рубце, достоверному росту целлюлозолитической активности, снижению суммарной доли патогенных и доли некоторых условно-патогенных микроорганизмов в рубцовом содержимом. Полученные данные свидетельствуют о благотворном влиянии введения аскорбата лития в качестве добавки к основному рациону на состав микробиоты рубца овец

The use of lysozyme to prepare biologically active chitooligomers

International audienceTwo types of crustacean commercial chitosans (CS1, CS2) were dissolved in lactic acid solutions, hydrolysed by lysozyme and finally fractioned by methanol solutions into two parts containing chito-oligomers (CS-O1, CS-O2). The antioxidant power and antimicrobial properties of both fractions were studied and compared with non-hydrolysed CS1 and CS2. The antioxidant properties were determined by the ferric ion reducing antioxidant power (FRAP) method while the bioactive properties were evaluated against a strain of Listeria monocytogenes. CS-O obtained from the solid fraction of the chito-oligomers solid fractions treated with 90% methanol showed the highest reducing power. Microbiological tests showed that CS-O exhibit higher antilisterial activity than CS

Reaction of imidazole and 2-methylimidazole with copper(II) salts and certain acids

Composition of biligand compounds Cu(C3H4N2, C4H6N2)x( )2 · nH2O obtained by reaction of aqueous suspensions of prepared poorly soluble copper(II) benzoate Cu(C7H5O2)2 · 3H2O and nicotinate Cu(C6H4NO2)2 · H2O with imidazole and 2-methylimidazole has been determined. Mono- and biligand salts have been analyzed and their thermal decomposition has been studied. IR spectroscopy has shown the participation of pyridine nitrogen of imidazole and carboxylic groups of aromatic acids in binding to copper(II) ion. Composition and stability of copper(II) benzoate complex, solubility constant for salt Cu(C7H5O2)2 · 3H2O at ionic strength I = 0.1 have been determined by solubility method, pH potentiometry, and photometry. Co-crystals/salts of composition C3H4N2 · C7H6O2 (pH 8.0), C3H4N2 · C6H5NO2 (pH 7.4) and 3(C4H6N2) · C19H19O6N7 · 2H2O (pH ~7) have been prepared and studied by thermogravimetric analysis. X-ray powder diffractograms have been recorded for initial compounds and their reaction products (imidazole–benzoic acid, 2-methylimidazole–folic acid systems)

DIAGNOSTICS AND TREATMENT OF CONGENITAL MALFORMATIONS OF THE LUNG AND MEDIASTINUM IN NEWBORN CHILDREN AND INFANTS

The article presents the experience of treatment of newborn children and infants with congenital malformations of the lung and mediastinum, which required a surgery. Children (138 cases) were treated during recent 18 years. There was a prevalence of full-term infants (73%). Fetal malformations were diagnosed in prenatal period in majority of cases. Computed tomography was the main method of diagnostics after delivery. Children (110 cases) were operated out of 138. Children with extrapulmonary sequestration didn’t undergo surgery in case of absence of clinical manifestations. The authors made a conclusion that malformations of the lung and mediastinum should be included in number of differentiated diseases in case of respiratory distress syndrome in newborn children. The indications to early surgery should be the danger of contamination and malignant transformation, presence of intrathoracic tension syndrome in neonatal period

EPILEPSY IN 11 PATIENTS WITH TYPICAL RETT SYNDROME CAUSED BY MECP2 MUTATION: CLINICAL AND ELECTROENCEPHALOGRAPHIC CHARACTERISTICS, COURSE, THERAPY (RESULTS OF THE AUTHORS’ OBSERVATIONS)

Examinations were made in 11 female patients aged 3 to 23 years with Rett syndrome and typical mutation in the MECP2 gene, who had been followed up from 2006 to 2015. The investigators evaluated neurological and psychic status (systematically) and performed continuous video electroencephalographic (EEG) monitoring (if clinically indicated), magnetic resonance imaging, and molecular cytogenetic examination. Epilepsy was diagnosed in 6 (54.5 %) patients: symptomatic focal epilepsy in 5 cases and symptomatic generalized epilepsy in 1. The mean age at epilepsy onset was 3 years and 9 months. Generalized epileptic seizures were noted in 60 % of cases and focal ones in 40 %. EEG changes were revealed in 9 patients, 5 with slowing of background activity, 2 with regional epileptiform activity, and 1 with diffuse epileptiform activity that corresponded to that of the benign epileptiform patterns of childhood. Five patients were recorded to have multiregional epileptiform activity