Publications by authors named "A Krylov"

623 Publications

The Peril of Politicizing Science.

Authors:
Anna I Krylov

J Phys Chem Lett 2021 Jun;12(22):5371-5376

Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States.

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http://dx.doi.org/10.1021/acs.jpclett.1c01475DOI Listing
June 2021

ROLE OF THROMBODYNAMICS GLOBAL COAGULATION TEST IN IMPROVING TREATMENT RESULTS IN PATIENTS WITH CORONAVIRUS INFECTION AT A COVID-19 HOSPITAL.

Georgian Med News 2021 Apr(313):72-79

First Moscow State Medical University I.M. Sechenov (Sechenov University), Russian Federation.

The aim of the study was to evaluate the effectiveness of the global coagulation test of thrombodynamics for monitoring and correcting the hemostatic system and improving the results of complex treatment in patients with SARS-CoV-2 in the COVID hospital. From April 2020 to December 2020 on the basis of the University Clinical Hospital No. 4 of the First Moscow State Medical University named I.M. Sechenov (Sechenov University) of the Ministry of Health of the Russian Federation 245 patients between the ages of 27 and 89 with SARS-CoV-2 associated pneumonia were treated. The mean age of the patients was 56.7 ± 4.2 years. All patients participating in the study were divided by simple randomization into two groups. The volume of lesion of the lung parenchyma was assessed according to the data of computed tomography. All patients were treated for SARS-CoV-2 in a comprehensive manner in accordance with the temporary guidelines of the Ministry of Health of the Russian Federation with the mandatory prescription of low molecular weight heparins (LMWH). Assessment and correction of the hemostasis system in 177 patients (47.7%) of group 1 was carried out daily using local coagulation tests (LCT), including APTT, PT, TT, PTI, INR, Fibrinogen and D-dimer level. The second group included 128 patients (52.3%), who, in addition to local coagulation tests, used the integral coagulation test - the thrombodynamics test- to assess and correct the state of the hemostatic system. Assessment and correction of hemostasis were performed at the control points (1, 7, 14 days) of the study. Compared to LCT, the thrombodynamics test reliably more often revealed the state of hypercoagulability, which was promptly corrected by increased doses of LMWH in group 2. Positive dynamics of clinical symptoms were detected in patients of group 2 1.8 times more often than in group 1 (p<0.05): fever and shortness of breath in group 2 decreased faster, the SpO2 index recovered more rapidly, especially in patients with severe hypoxia (with SpO2<90), the number of patients with moderate and severe severity by the third point of the study in group 2 was 1.8 times less than in group 1 (p<0.05). Severe forms of lung damage (CT-3 and CT-4) were detected in group 2 3.2 times less frequently (p <0.01) compared with group 1, and the number of deaths was 3.3 times less frequent (p<0.01) by the end of the study. The average bed-day in group 2 of patients (15±1.6 days) was 1.6 times shorter than in group 1 (24±7.2 days). Hemorrhagic complications were not recorded, despite the therapeutic doses of LMWH in patients of group 2. The severity of the condition of patients with SARS-CoV-2 and the dynamics of their symptoms depend on the state of microcirculation in the lungs and in the periphery and on the volume of thrombotic lesions. Anticoagulant therapy prescribed as early as possible in adequate therapeutic doses in patients with SARS-CoV-2 associated viral pneumonia made it possible to achieve positive treatment results. The use of the global coagulation thrombodynamics test has shown high efficiency for the timely assessment and correction of the state of the hemostasis system.
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April 2021

Efficient production of long double-stranded RNAs applicable to agricultural pest control by Corynebacterium glutamicum equipped with coliphage T7-expression system.

Appl Microbiol Biotechnol 2021 Jun 7. Epub 2021 Jun 7.

Research Institute for Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc., 1-1, Suzuki-cho, Kawasaki-ku, Kawasaki, 210-8681, Japan.

RNA-based pesticides exert their function by suppressing the expression of an essential gene in the target pest through RNA interference caused by double-stranded RNA (dsRNA). Here, we selected target genes for growth suppression of the solanaceous crop pests ladybird beetle (Henosepilachna vigintioctopunctata) and Colorado potato beetle (Leptinotarsa decemlineata)-the death-associated inhibitor of apoptosis protein 1 gene (diap1), and an orthologous gene of the COPI coatomer protein complex (copI), respectively. We constructed a cost-competitive overproduction system for dsRNA using Corynebacterium glutamicum as a host bacterium. The dsRNA expression unit was equipped with two sets of promoters and terminators derived from coliphage T7, and the convergent expression system was designed to be selectively transcribed by T7 RNA polymerase. This expression system efficiently overproduced both target dsRNAs. On culture in a jar fermentor, the yield of diap1-targeting dsRNA (approximately 360 bp) was > 1 g per liter of culture. Long-chain diap1-targeting dsRNAs (up to around 1 kbp) could be produced without a substantial loss of efficiency. dsRNA accumulated in C. glutamicum significantly suppressed larval growth of H. vigintioctopunctata. The dsRNA expression technology developed here is expected to substantially reduce dsRNA production costs. Our method can be applied for a wide range of industrial uses, including agricultural pest control. KEY POINTS: • Overexpression of dsRNA was achieved in C. glutamicum using a coliphage T7 system. • The best strain produced > 1 g/L of the target dsRNA species, for use as an insecticide. • The developed system efficiently produced long dsRNA species, up to ~ 1 kbp.
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http://dx.doi.org/10.1007/s00253-021-11324-9DOI Listing
June 2021

[COMPLEX TREATMENT OF PATIENTS WITH VENOUS TROPHIC ULCER IN THE CONDITIONS OF COVID-19 HOSPITAL].

Georgian Med News 2021 Mar(312):7-14

Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University (Sechenov University) of the Ministry of Health of the Russian Federation.

The aim of the study was to study the effectiveness of complex treatment of decompensated chronic venous insufficiency (CVI) using innovative techniques and proteolysis inhibitors with a wide spectrum of activity in patients with SARS-CoV-2 (COVID-19) in COVID hospital. This study was performed in the surgical department of COVID hospital on the basis of the Clinical Hospital No. 4 of the First Moscow State Medical University named I.M. Sechenov (Sechenov University). During the period from April 2020 to February 2021, 32 patients with confirmed SARS-CoV-2 (COVID-19) and the presence of venous trophic ulcers (VTU) of the lower extremities were treated. All patients underwent complex therapy for viral pneumonia in accordance with the order of the Ministry of Health of the Russian Federation. The protease inhibitor Aprotinin (Gordox ™) was used to improve microcirculation and prevent the development of a "cytokine storm". To accelerate the cleansing and epithelialization of venous trophic ulcers, the surface of the trophic ulcer was treated with an air plasma flow of NO and injections into the trophic ulcer of autoplasma. Against the background of complex treatment, all patients showed positive dynamics of the clinical picture: relief of hyperthermia, increase or stabilization of SpO2 values from 95% and above, significant decrease in CRP, LDH, D-dimer indices, increase in the number of lymphocytes, decrease in the VTU area by 1.5 times, active granulation and marginal epithelialization of the ulcer. In 14 patients (43.8%), complete epithelialization of the VTU defect was noted by the end of the third week. According to the CIVIQ-20 questionnaire, all 32 patients participating in the study showed positive dynamics. There were no lethal outcomes. Multicomponent therapy of decompensated forms of CVI of the lower extremities in the COVID hospital in patients with moderate severity of coronavirus infection with the use of proteolysis inhibitors leads to a rapid relief of symptoms of intoxication, prevents the progression of lung tissue and parenchymal organ damage and contributes to the positive dynamics of healing of ulcerative defects in the vast majority of patients.
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March 2021

An assessment of different electronic structure approaches for modeling time-resolved x-ray absorption spectroscopy.

Struct Dyn 2021 Mar 12;8(2):024101. Epub 2021 Mar 12.

DTU Chemistry, Technical University of Denmark, Kemitorvet Building 207, DK-2800 Kgs. Lyngby, Denmark.

We assess the performance of different protocols for simulating excited-state x-ray absorption spectra. We consider three different protocols based on equation-of-motion coupled-cluster singles and doubles, two of them combined with the maximum overlap method. The three protocols differ in the choice of a reference configuration used to compute target states. Maximum-overlap-method time-dependent density functional theory is also considered. The performance of the different approaches is illustrated using uracil, thymine, and acetylacetone as benchmark systems. The results provide guidance for selecting an electronic structure method for modeling time-resolved x-ray absorption spectroscopy.
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http://dx.doi.org/10.1063/4.0000070DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7986275PMC
March 2021