Contrasting patterns of the 5S and 45S rDNA evolutions in the Byblis liniflora complex (Byblidaceae)

To clarify the evolutionary dynamics of ribosomal RNA genes (rDNAs) in the Byblis liniflora complex (Byblidaceae), we investigated the 5S and 45S rDNA genes through (1) chromosomal physical mapping by fluorescence in situ hybridization (FISH) and (2) phylogenetic analyses using the nontranscribed spacer of 5S rDNA (5S-NTS) and the internal transcribed spacer of 45S rDNA (ITS). In addition, we performed phylogenetic analyses based on rbcL and trnK intron. The complex was divided into 2 clades: B. aquatica–B. filifolia and B. guehoi–B. liniflora–B. rorida. Although members of the complex had conservative symmetric karyotypes, they were clearly differentiated on chromosomal rDNA distribution patterns. The sequence data indicated that ITS was almost homogeneous in all taxa in which two or four 45S rDNA arrays were frequently found at distal regions of chromosomes in the somatic karyotype. ITS homogenization could have been prompted by relatively distal 45S rDNA positions. In contrast, 2–12 5S rDNA arrays were mapped onto proximal/interstitial regions of chromosomes, and some paralogous 5S-NTS were found in the genomes harboring 4 or more arrays. 5S-NTS sequence type-specific FISH analysis showed sequence heterogeneity within and between some 5S rDNA arrays. Interlocus homogenization may have been hampered by their proximal location on chromosomes. Chromosomal location may have affected the contrasting evolutionary dynamics of rDNAs in the B. liniflora complex

Пути улучшения диагностики и лечения поражения легких при системной склеродермии на территории Сибирского федерального округа (материалы совместного совета экспертов ревматологов и пульмонологов от 8.12.2019)

The aim of the study was to develop ways to improve the diagnosis and treatment of systemic sclerosis (SSc)-ILD. Interstitial lung disease (ILD) is a common manifestation of SSc. In the territory of the Siberian Federal District (SFD), the number of patients with the progressive phenotype of SSc-ILD is approximately 750 people. When immunosuppressive therapy is ineffective and pulmonary fibrosis progresses, lung transplantation is indicated. The emergence of new possibilities of pathogenetic therapy currently requires studying the possibilities of their applications in real clinical practice on the territory of the SFD.Discussion. The results of a discussion of diagnostics, therapy, and routing of a rheumatology patient during the interdisciplinary observation of SSc-ILD in the SFD are presented. The reason for this discussion was the new data on the use of nintedanib in this category of patientsConclusion. To improve the efficiency of diagnosis and treatment of patients with SSc in the SFD, it is necessary to implement the principle of a multidisciplinary approach with the obligatory involvement of a pulmonologist and a radiologist (a specialist in CT diagnostics), and, if differential diagnosis is necessary in difficult clinical situations, of a pathomorphologist. An urgent task is the introduction of an algorithm for examining patients with SSc for the timely diagnosis of ILD in the territory of the Siberian Federal District. To improve the quality of medical care in the territory of the SFD for patients with ILD-SSc it is necessary to create a reference center in the city of Novosibirsk with the possibility of initiating anti-fibrosis therapy.Введение. Поражение легких у больных ССД является одним из наиболее частых проявлений висцеральной патологии и рассматривается как вариант фиброзирующих диффузных интерстициальных заболеваний легких (ИЗЛ). Несмотря на продемонстрированную эффективность патогенетической иммуносупрессивной терапии, у ряда пациентов фиброзные изменения в легочной ткани имеют прогрессирующее течение, что негативно сказывается на качестве и продолжительности жизни пациента. На территории Сибирского федерального округа (СФО) количество пациентов с ССД, имеющих прогрессирующее поражение легких, составляет приблизительно 750 человек. Таким образом, проблема своевременной диагностики и лечения поражения легких при ССД оказывается весьма актуальной и для СФО. Имеющиеся в настоящее время данные об эффективности современной противофиброзной терапии ИЗЛ при ССД требуют изучения возможности ее применения в реальной клинической практике на территории СФО.Цель. Разработать пути улучшения диагностики и лечения поражений легких при системной склеродермии (ССД).Обсуждение. Представлены результаты междисциплинарного обсуждения вопросов диагностики, терапии, маршрутизации пациентов с ССД и ИЗЛ на территории СФО. Причиной данного обсуждения явилось появление сведений об эффективности нинтеданиба у данной категории пациентов.Заключение. Для повышения эффективности диагностики и лечения больных ССД с поражением легких необходимо реализовать принцип мультидисциплинарного подхода с обязательным привлечением пульмонолога и рентгенолога (специалиста по КТ-диагностике), а при необходимости дифференциальной диагностики в сложных клинических ситуациях – патоморфолога. Актуальной задачей оказывается внедрение на территории СФО алгоритма обследования пациентов с ССД для своевременной диагностики ИЗЛ. Для повышения качества оказания медицинской помощи на территории СФО пациентам с ИЗЛ при ССД необходимо создать референсный центр в г.  Новосибирске с возможностью инициации специалистами этого центра антифибротической терапии

ON THE TERMINOLOGY OF SPONDYLOARTHRITIS

By the end of the first decade of the 21st century, spondyloarthritis studies have accumulated a certain number of terms that are obsolete, but used by physicians in their everyday speech, on the one hand, and a great variety of different definitions, on the other hand. In January 2014, the first organizational meeting of the Expert Group on Spondyloarthritis, Association of Rheumatologists of Russia, decided that its primary task should be to order the terminology used in this area. The authors primarily collected the terms, which had been already used in medical vocabulary, and then divided them into two categories: obsolete definitions and terms to be finalized and unified. This publication gives guidelines for using the medical terms relevant to spondyloarthritis and separately discusses how to correctly write the term sacroiliitis

Integrative genetic map of repetitive DNA in the sole Solea senegalensis genome shows a Rex transposon located in a proto-sex chromosome

Repetitive sequences play an essential role in the structural and functional evolution of the genome, particularly in the sexual chromosomes. The Senegalese sole (Solea senegalensis) is a valuable flatfish in aquaculture albeit few studies have addressed the mapping and characterization of repetitive DNA families. Here we analyzed the Simple Sequence Repeats (SSRs) and Transposable elements (TEs) content from fifty-seven BAC clones (spanning 7.9 Mb) of this species, located in chromosomes by multiple fluorescence in situ hybridization (m-BAC-FISH) technique. The SSR analysis revealed an average density of 675.1 loci per Mb and a high abundance (59.69%) of dinucleotide coverage was observed, being 'AC' the most abundant. An SSR-FISH analysis using eleven probes was also carried out and seven of the 11 probes yielded positive signals. 'AC' probes were present as large clusters in almost all chromosomes, supporting the bioinformatic analysis. Regarding TEs, DNA transposons (Class II) were the most abundant. In Class I, LINE elements were the most abundant and the hAT family was the most represented in Class II. Rex/Babar subfamily, observed in two BAC clones mapping to chromosome pair 1, showed the longest match. This chromosome pair has been recently reported as a putative sexual proto-chromosome in this species, highlighting the possible role of the Rex element in the evolution of this chromosome. In the Rex1 phylogenetic tree, the Senegalese sole Rex1 retrotransposon could be associated with one of the four major ancient lineages in fish genomes, in which it is included O. latipes

Effect of SGLT2 inhibitors on stroke and atrial fibrillation in diabetic kidney disease: Results from the CREDENCE trial and meta-analysis

BACKGROUND AND PURPOSE: Chronic kidney disease with reduced estimated glomerular filtration rate or elevated albuminuria increases risk for ischemic and hemorrhagic stroke. This study assessed the effects of sodium glucose cotransporter 2 inhibitors (SGLT2i) on stroke and atrial fibrillation/flutter (AF/AFL) from CREDENCE (Canagliflozin and Renal Events in Diabetes With Established Nephropathy Clinical Evaluation) and a meta-Analysis of large cardiovascular outcome trials (CVOTs) of SGLT2i in type 2 diabetes mellitus. METHODS: CREDENCE randomized 4401 participants with type 2 diabetes mellitus and chronic kidney disease to canagliflozin or placebo. Post hoc, we estimated effects on fatal or nonfatal stroke, stroke subtypes, and intermediate markers of stroke risk including AF/AFL. Stroke and AF/AFL data from 3 other completed large CVOTs and CREDENCE were pooled using random-effects meta-Analysis. RESULTS: In CREDENCE, 142 participants experienced a stroke during follow-up (10.9/1000 patient-years with canagliflozin, 14.2/1000 patient-years with placebo; hazard ratio [HR], 0.77 [95% CI, 0.55-1.08]). Effects by stroke subtypes were: ischemic (HR, 0.88 [95% CI, 0.61-1.28]; n=111), hemorrhagic (HR, 0.50 [95% CI, 0.19-1.32]; n=18), and undetermined (HR, 0.54 [95% CI, 0.20-1.46]; n=17). There was no clear effect on AF/AFL (HR, 0.76 [95% CI, 0.53-1.10]; n=115). The overall effects in the 4 CVOTs combined were: Total stroke (HRpooled, 0.96 [95% CI, 0.82-1.12]), ischemic stroke (HRpooled, 1.01 [95% CI, 0.89-1.14]), hemorrhagic stroke (HRpooled, 0.50 [95% CI, 0.30-0.83]), undetermined stroke (HRpooled, 0.86 [95% CI, 0.49-1.51]), and AF/AFL (HRpooled, 0.81 [95% CI, 0.71-0.93]). There was evidence that SGLT2i effects on total stroke varied by baseline estimated glomerular filtration rate (P=0.01), with protection in the lowest estimated glomerular filtration rate (45 mL/min/1.73 m2]) subgroup (HRpooled, 0.50 [95% CI, 0.31-0.79]). CONCLUSIONS: Although we found no clear effect of SGLT2i on total stroke in CREDENCE or across trials combined, there was some evidence of benefit in preventing hemorrhagic stroke and AF/AFL, as well as total stroke for those with lowest estimated glomerular filtration rate. Future research should focus on confirming these data and exploring potential mechanisms

Cause of Death and Predictors of All-Cause Mortality in Anticoagulated Patients With Nonvalvular Atrial Fibrillation : Data From ROCKET AF

M. Kaste on työryhmän ROCKET AF Steering Comm jäsen.Background-Atrial fibrillation is associated with higher mortality. Identification of causes of death and contemporary risk factors for all-cause mortality may guide interventions. Methods and Results-In the Rivaroxaban Once Daily Oral Direct Factor Xa Inhibition Compared with Vitamin K Antagonism for Prevention of Stroke and Embolism Trial in Atrial Fibrillation (ROCKET AF) study, patients with nonvalvular atrial fibrillation were randomized to rivaroxaban or dose-adjusted warfarin. Cox proportional hazards regression with backward elimination identified factors at randomization that were independently associated with all-cause mortality in the 14 171 participants in the intention-to-treat population. The median age was 73 years, and the mean CHADS(2) score was 3.5. Over 1.9 years of median follow-up, 1214 (8.6%) patients died. Kaplan-Meier mortality rates were 4.2% at 1 year and 8.9% at 2 years. The majority of classified deaths (1081) were cardiovascular (72%), whereas only 6% were nonhemorrhagic stroke or systemic embolism. No significant difference in all-cause mortality was observed between the rivaroxaban and warfarin arms (P=0.15). Heart failure (hazard ratio 1.51, 95% CI 1.33-1.70, P= 75 years (hazard ratio 1.69, 95% CI 1.51-1.90, P Conclusions-In a large population of patients anticoagulated for nonvalvular atrial fibrillation, approximate to 7 in 10 deaths were cardiovascular, whereasPeer reviewe

Многоцентровое проспективное исследование эффективности и безопасности гликозаминогликан-пептидного комплекса у пациентов с остеоартритом коленных суставов и коморбидностью

Objective: to evaluate the efficacy and safety of glycosaminoglycan-peptide complex (GPC, Rumalon) used in patients with knee osteoarthritis (OA) and comorbidities (hypertension and/or type 2 diabetes mellitus (T2DM).Patients and methods: A 10-month multicenter (13 centers from 10 subjects of the Russian Federation) prospective study included 179 patients with Stages II–III primary tibiofemoral knee OA and comorbidity, a walking pain intensity of ≥40 mm on a visual analogue scale (VAS), and a need for nonsteroidal anti-inflammatory drugs (for at least 30 days in the previous 3 months). The efficiency of treatment was evaluated from the changes in VAS scores for knee pain intensity during walking, the overall WOMAC score and scores of its individual indicators, laboratory parameters, and ultrasound data. All the patients received 2 cycles of GPC treatment with 25 injections, by following the manufacturer's instructions.Results and discussion. Even at 2 months after starting the treatment, there was a statistically significant reduction in pain during walking from 60 (50–69) to 40 (27–53.5) mm on the VAS (p< 0.05), which persisted during the follow-up period. A similar pattern was found when assessing the WOMAC index and its components. The drug demonstrated an anti-inflammatory effect: a decrease in the number of patients with synovitis from 55.7 to 39.2% (p=0.02), the level of high-sensitivity C-reactive protein (hsCRP) from 3.2 (1.3–6.2) to 2.6 (1.2–5.7) mg/l (p< 0.05). GPC was ascertained to have a safety profile.Conclusion. The data of this study confirm the good therapeutic effect and safety of GPC Rumalon in knee OA patients with hypertension and/or T2DM. The drug is shown to have a rapid analgesic and anti-inflammatory effect, as well as a positive influence on all clinical manifestations of OA.Цель исследования – оценка эффективности и безопасности применения гликозаминогликан-пептидного комплекса (ГПК) у пациентов с остеоартритом (ОА) коленных суставов и коморбидными заболеваниями (артериальная гипертензия – АГ – и/или сахарный диабет – СД – 2-го типа).Пациенты и методы. В многоцентровое (13 центров из 10 субъектов Российской Федерации) 10-месячное проспективное исследование включено 179 пациентов с первичным тибиофеморальным ОА коленных суставов II–III стадии и коморбидностью, интенсивностью боли при ходьбе ≥40 мм по визуальной аналоговой шкале (ВАШ), потребностью в приеме нестероидных противовоспалительных препаратов (как минимум 30 дней за предшествующие 3 мес).  Эффективность лечения оценивалась по динамике интенсивности боли в коленном суставе при ходьбе по ВАШ, индекса WOMAC в целом и отдельных его параметров, лабораторных показателей и данных УЗИ. Все пациенты получили 2 курса лечения ГПК по 25 инъекций в соответствии с инструкцией фирмы-производителя.Результаты и обсуждение.  Уже через 2 мес после начала лечения отмечено статистически значимое снижение боли при ходьбе по ВАШ с 60 (50–69) до 40 (27–53,5) мм (р<0,05), которое сохранялось на протяжении всего периода наблюдения. Аналогичная закономерность выявлялась и при оценке индекса WOMAC и его составляющих. Продемонстрирован противовоспалительный эффект препарата: уменьшение количества пациентов с синовитом с 55,7 до 39,2% (р=0,02), уровня высокочувствительного СРБ с 3,2 (1,3–6,2) до 2,6 (1,2–5,7) мг/л (р<0,05). Установлен высокий профиль безопасности ГПК. Заключение. Данные настоящего исследования подтверждают хорошее лечебное действие и безопасность ГПК у больных ОА коленных суставов с АГ и/или СД 2-го типа. Показаны быстрый анальгетический и противовоспалительный эффект препарата, его позитивное влияние на все клинические проявления ОА.