LIVIVO - Search results -

Search results

Result 1 - 10 of total 305

Search options

Article ; Online: Preleukemic Fusion Genes Induced via Ionizing Radiation.

Kosik, Pavol / Skorvaga, Milan / Belyaev, Igor

International journal of molecular sciences

2023 Volume 24, Issue 7

Abstract: Although the prevalence of leukemia is increasing, the agents responsible for this increase are not definitely known. While ionizing radiation (IR) was classified as a group one carcinogen by the IARC, the IR-induced cancers, including leukemia, are ... ...

Abstract	Although the prevalence of leukemia is increasing, the agents responsible for this increase are not definitely known. While ionizing radiation (IR) was classified as a group one carcinogen by the IARC, the IR-induced cancers, including leukemia, are indistinguishable from those that are caused by other factors, so the risk estimation relies on epidemiological data. Several epidemiological studies on atomic bomb survivors and persons undergoing IR exposure during medical investigations or radiotherapy showed an association between radiation and leukemia. IR is also known to induce chromosomal translocations. Specific chromosomal translocations resulting in preleukemic fusion genes (PFGs) are generally accepted to be the first hit in the onset of many leukemias. Several studies indicated that incidence of PFGs in healthy newborns is up to 100-times higher than childhood leukemia with the same chromosomal aberrations. Because of this fact, it has been suggested that PFGs are not able to induce leukemia alone, but secondary mutations are necessary. PFGs also have to occur in specific cell populations of hematopoetic stem cells with higher leukemogenic potential. In this review, we describe the connection between IR, PFGs, and cancer, focusing on recurrent PFGs where an association with IR has been established.
MeSH term(s)	Infant, Newborn ; Humans ; Child ; Translocation, Genetic ; Neoplasms, Radiation-Induced/genetics ; Neoplasms, Radiation-Induced/epidemiology ; Leukemia/genetics ; Chromosome Aberrations ; Radiation, Ionizing
Language	English
Publishing date	2023-04-01
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2019364-6
ISSN	1422-0067 ; 1422-0067 ; 1661-6596
ISSN (online)	1422-0067
ISSN	1422-0067 ; 1661-6596
DOI	10.3390/ijms24076580
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article: (with research data) Magnetic field inhomogeneities due to CO

Makinistian, L / Belyaev, I

Royal Society open science

2018 Volume 5, Issue 2, Page(s) 172095

Abstract: A thorough assessment of the static magnetic field (SMF) inside a ... ...

Abstract	A thorough assessment of the static magnetic field (SMF) inside a CO
Language	English
Publishing date	2018-02-14
Publishing country	England
Document type	Journal Article
ZDB-ID	2787755-3
ISSN	2054-5703
ISSN	2054-5703
DOI	10.1098/rsos.172095
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Static magnetic fields from earphones: Detailed measurements plus some open questions.

Makinistian, L / Zastko, L / Tvarožná, A / Días, L E / Belyaev, I

Environmental research

2022 Volume 214, Issue Pt 2, Page(s) 113907

Abstract: Earphones (EP) are a worldwide, massively adopted product, assumed to be innocuous provided the recommendations on sound doses limits are followed. Nevertheless, sound is not the only physical stimulus that derives from EP use, since they include a built- ...

Abstract	Earphones (EP) are a worldwide, massively adopted product, assumed to be innocuous provided the recommendations on sound doses limits are followed. Nevertheless, sound is not the only physical stimulus that derives from EP use, since they include a built-in permanent magnet from which a static magnetic field (SMF) originates. We performed 2D maps of the SMF at several distances from 6 models of in-ear EP, showing that they produce an exposure that spans from ca. 20 mT on their surface down to tens of μT in the inner ear. The numerous reports of bioeffects elicited by SMF in that range of intensities (applied both acutely and chronically), together with the fact that there is no scientific consensus over the possible mechanisms of interaction with living tissues, suggest that caution could be recommendable. In addition, more research is warranted on the possible effects of the combination of SMF with extremely low frequency and radiofrequency fields, which has so far been scarcely studied. Overall, while several open questions about bioeffects of SMF remain to be addressed by the scientific community, we find sensible to suggest that the use of air-tube earphones is probably the more conservative, cautious choice.
MeSH term(s)	Magnetic Fields
Language	English
Publishing date	2022-07-21
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	205699-9
ISSN	1096-0953 ; 0013-9351
ISSN (online)	1096-0953
ISSN	0013-9351
DOI	10.1016/j.envres.2022.113907
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 726: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: [SENSITIVITY STUDY OF ANTIMICROBIAL PNEUMOCOCCI IN CENTRAL KAZAKHSTAN].

Belyaev, I / Belyaev, A

Georgian medical news

2017 , Issue 262, Page(s) 101–106

Abstract: To determine the epidemiological pattern of antibiotic resistance strains of S. Pneumoniae studied the sensitivity of nasopharyngeal isolates of pneumococci isolated from healthy children attending sports clubs Karaganda region. The frequency of ... ...

Abstract	To determine the epidemiological pattern of antibiotic resistance strains of S. Pneumoniae studied the sensitivity of nasopharyngeal isolates of pneumococci isolated from healthy children attending sports clubs Karaganda region. The frequency of allocation of pneumococci was 35.57%. In accordance with the values of the minimum inhibitory concentration resistant pneumococci was: penicillin - 5.41%, erythromycin - 8.1%, clindamycin - 4.05%, amoxicillin-6.76%, tetracycline 28.38%. Resistance to beta-lactam antibiotics in the studied children is not a significant problem. Worthy of attention is the high proportion of resistance to tetracycline, which has recently been used for medical purposes much less than macrolides and betalaktamy. This finding suggests the presence of other resistance mechanisms of formation.
MeSH term(s)	Adolescent ; Anti-Bacterial Agents/pharmacology ; Child ; Drug Resistance, Bacterial ; Female ; Humans ; Kazakhstan ; Male ; Microbial Sensitivity Tests ; Streptococcus pneumoniae/drug effects ; Streptococcus pneumoniae/isolation & purification
Chemical Substances	Anti-Bacterial Agents
Language	Russian
Publishing date	2017-01
Publishing country	Georgia (Republic)
Document type	Journal Article
ZDB-ID	2443648-3
ISSN	1512-0112
ISSN	1512-0112
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Intermittent ELF-MF Induce an Amplitude-Window Effect on Umbilical Cord Blood Lymphocytes.

Zastko, Lucián / Makinistian, Leonardo / Tvarožná, Andrea / Belyaev, Igor

International journal of molecular sciences

2022 Volume 23, Issue 22

Abstract: In a previous study of the effects of intermittent extremely low frequency (ELF) magnetic fields (MF) on umbilical cord blood lymphocytes (UCBL), we evaluated MF amplitudes between 6 µT and 24 µT and found an effect only for those below 13 µT. This ... ...

Abstract	In a previous study of the effects of intermittent extremely low frequency (ELF) magnetic fields (MF) on umbilical cord blood lymphocytes (UCBL), we evaluated MF amplitudes between 6 µT and 24 µT and found an effect only for those below 13 µT. This suggested the existence of an amplitude window. In this brief communication, we further tested this hypothesis. UCBLs from healthy newborns were isolated and exposed for 72 h to an intermittent ELF-MF (triangular, 7.8 Hz, 250 s ON/250 s OFF) with 6 different amplitudes between 3 µT and 12 µT, utilizing an oblong coil. Percentage of viable, early apoptotic (EA), and late apoptotic/necrotic (LAN) cells were determined by flow cytometry. Moreover, reactive oxygen species (ROS) were determined at 1 h and 3 h of the exposure. Like in our previous work, neither EA, nor LAN, nor ROS were statistically significantly affected by the intermittent ELF-MF. However, the percentage of viable cells was decreased by exposure to the fields with intensities of 6.5 µT and 12 µT (p < 0.05; and p = 0.057 for 8.5 µT). ELF-MF decreased the percentage of viable cells for fields down to 6.5 µT, but not for 5 µT, 4 µT, or 3 µT. Combined with our previous findings, the results reported here indicate an amplitude window effect between 6 µT and 13 µT. The obtained data are in line with a notion of amplitude and frequency windows, which request scanning of both amplitude and frequency while studying the ELF-MF effects.
MeSH term(s)	Infant, Newborn ; Humans ; Fetal Blood ; Reactive Oxygen Species ; Magnetic Fields ; Lymphocytes ; Flow Cytometry
Chemical Substances	Reactive Oxygen Species
Language	English
Publishing date	2022-11-19
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2019364-6
ISSN	1422-0067 ; 1422-0067 ; 1661-6596
ISSN (online)	1422-0067
ISSN	1422-0067 ; 1661-6596
DOI	10.3390/ijms232214391
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Mapping of static magnetic fields near the surface of mobile phones.

Zastko, L / Makinistian, L / Tvarožná, A / Ferreyra, F L / Belyaev, I

Scientific reports

2021 Volume 11, Issue 1, Page(s) 19002

Abstract: Whether the use of mobile phones (MP) represents a health hazard is still under debate. As part of the attempts to resolve this uncertainty, there has been an extensive characterization of the electromagnetic fields MP emit and receive. While the ... ...

Abstract	Whether the use of mobile phones (MP) represents a health hazard is still under debate. As part of the attempts to resolve this uncertainty, there has been an extensive characterization of the electromagnetic fields MP emit and receive. While the radiofrequencies (RF) have been studied exhaustively, the static magnetic fields (SMF) have received much less attention, regardless of the fact there is a wealth of evidence demonstrating their biological effects. We performed 2D maps of the SMF at several distances from the screen of 5 MP (models between 2013 and 2018) using a tri-axis magnetometer. We built a mathematical model to fit our measurements, extrapolated them down to the phones' screen, and calculated the SMF on the skin of a 3D head model, showing that exposure is in the µT to mT range. Our literature survey prompts the need of further research not only on the biological effects of SMF and their gradients, but also on their combination with extremely low frequency (ELF) and RF fields. The study of combined fields (SMF, ELF, and RF) as similar as possible to the ones that occur in reality should provide a more sensible assessment of potential risks.
Language	English
Publishing date	2021-09-24
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-021-98083-9
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Molecular targets and mechanisms in formation of chromosomal aberrations: contributions of Soviet scientists.

Belyaev, I

Cytogenetic and genome research

2004 Volume 104, Issue 1-4, Page(s) 56–64

Abstract: Studies of mechanisms for formation of chromosomal aberrations (CAs) with special emphasis on data from Soviet/Russian investigations are reviewed that argue in favor of a minor fraction of genomic DNA that forms specific molecular targets/contacts for ... ...

Abstract	Studies of mechanisms for formation of chromosomal aberrations (CAs) with special emphasis on data from Soviet/Russian investigations are reviewed that argue in favor of a minor fraction of genomic DNA that forms specific molecular targets/contacts for the formation of chromosomal exchanges. This DNA is presumably associated with matrix attachment sites of DNA loops, enriched with AT base pairs and repetitive DNA sequences. It is assumed that there are two main mechanisms in formation of chromosome aberrations: 1) mutually reciprocal recombination, resulting in formation of all kinds of chromosome exchanges; 2) the process of telomere formation, resulting in the generation of true deletions. A significant part of chromosomal breaks and apparently unrejoined ends in incomplete exchanges as seen with cytogenetic techniques reflect decondensation in the discrete units of chromatin organization such as the megabase-size DNA domains. The possible ways for further analysis of alternative theories with emerging technologies are also discussed.
MeSH term(s)	Animals ; Cell Cycle ; Cells, Cultured/drug effects ; Cells, Cultured/radiation effects ; Cells, Cultured/ultrastructure ; Chromatin/ultrastructure ; Chromosome Aberrations ; Chromosome Breakage ; Chromosome Deletion ; Chromosomes, Human/drug effects ; Chromosomes, Human/radiation effects ; Chromosomes, Human/ultrastructure ; Chromosomes, Plant/drug effects ; Chromosomes, Plant/radiation effects ; Chromosomes, Plant/ultrastructure ; DNA/genetics ; DNA Damage ; Humans ; Lymphocytes/drug effects ; Lymphocytes/radiation effects ; Lymphocytes/ultrastructure ; Models, Genetic ; Mutagenesis ; Mutagens/pharmacology ; Recombination, Genetic ; Telomere/ultrastructure ; Translocation, Genetic ; USSR
Chemical Substances	Chromatin ; Mutagens ; DNA (9007-49-2)
Language	English
Publishing date	2004
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	2087824-2
ISSN	1424-859X ; 1424-8581
ISSN (online)	1424-859X
ISSN	1424-8581
DOI	10.1159/000077466
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Zs.A 512: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾

Article: Static magnetic fields from earphones: Detailed measurements plus some open questions

Makinistian, L. / Zastko, L. / Tvarožná, A. / Días, L.E. / Belyaev, I.

Environmental research. 2022 July 11,

2022

Abstract	Earphones (EP) are a worldwide, massively adopted product, assumed to be innocuous provided the recommendations on sound doses limits are followed. Nevertheless, sound is not the only physical stimulus that derives from EP use, since they include a built-in permanent magnet from which a static magnetic field (SMF) originates. We performed 2D maps of the SMF at several distances from 6 models of in-ear EP, showing that they produce an exposure that spans from ca. 20 mT on their surface down to tens of μT in the inner ear. The numerous reports of bioeffects elicited by SMF in that range of intensities (applied both acutely and chronically), together with the fact that there is no scientific consensus over the possible mechanisms of interaction with living tissues, suggest that caution could be recommendable. In addition, more research is warranted on the possible effects of the combination of SMF with extremely low frequency and radiofrequency fields, which has so far been scarcely studied. Overall, while several open questions about bioeffects of SMF remain to be addressed by the scientific community, we find sensible to suggest that the use of air-tube earphones is probably the more conservative, cautious choice.
Keywords	bioactive properties ; inner ear ; magnetic fields ; magnetic materials ; radio waves ; research
Language	English
Dates of publication	2022-0711
Publishing place	Elsevier Inc.
Document type	Article
Note	Pre-press version
ZDB-ID	205699-9
ISSN	1096-0953 ; 0013-9351
ISSN (online)	1096-0953
ISSN	0013-9351
DOI	10.1016/j.envres.2022.113907
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Cologne/Königswinter

Zs.A 726: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Biodosimetry of Low Dose Ionizing Radiation Using DNA Repair Foci in Human Lymphocytes.

Jakl, Lukáš / Marková, Eva / Koláriková, Lucia / Belyaev, Igor

Genes

2020 Volume 11, Issue 1

Abstract: Purpose: Ionizing radiation induced foci (IRIF) known also as DNA repair foci represent most sensitive endpoint for assessing DNA double strand breaks (DSB). IRIF are usually visualized and enumerated with the aid of fluorescence microscopy using ... ...

Abstract	Purpose: Ionizing radiation induced foci (IRIF) known also as DNA repair foci represent most sensitive endpoint for assessing DNA double strand breaks (DSB). IRIF are usually visualized and enumerated with the aid of fluorescence microscopy using antibodies to γH2AX and 53BP1. This study analyzed effect of low dose ionizing radiation on residual IRIF in human lymphocytes to the aim of potential biodosimetry and possible extrapolation of high-dose γH2AX/53BP1 effects to low doses and compared kinetics of DSB and IRIF. We also analyzed whether DNaseI, which is used for reducing of clumps, affects the IRIF level. Materials and methods: The cryopreserved human lymphocytes from umbilical cord blood (UCB) were thawed with/without DNaseI, γ-irradiated at doses of 0, 5, 10, and 50 cGy and γH2AX/53BP1 foci were analyzed 30 min, 2 h, and 22 h post-irradiation using appropriate antibodies. We also analyzed kinetics of DSB using PFGE. Results: No significant difference was observed between data obtained by γH2AX foci evaluation in cells that were irradiated by low doses and data obtained by extrapolation from higher doses. Residual 53BP1 foci induced by low doses significantly outreached the data extrapolated from irradiation by higher doses. 53BP1 foci induced by low dose-radiation remain longer at DSB loci than foci induced by higher doses. There was no significant effect of DNaseI on DNA repair foci. Conclusions: Primary γH2AX, 53BP1 foci and their co-localization represent valuable markers for biodosimetry of low doses, but their usefulness is limited by short time window. Residual γH2AX and 53BP1 foci are more useful markers for biodosimetry in vitro. Effects of low doses can be extrapolated from high dose using γH2AX residual foci while γH2AX/53BP1 foci are valuable markers for evaluation of initial DSB induced by ionizing radiation. Residual IRIF induced by low doses persist longer time than those induced by higher doses.
MeSH term(s)	DNA Repair ; Dose-Response Relationship, Radiation ; Gamma Rays/adverse effects ; Histones/metabolism ; Humans ; Lymphocytes/metabolism ; Lymphocytes/pathology ; Microscopy, Fluorescence ; Tumor Suppressor p53-Binding Protein 1/metabolism
Chemical Substances	H2AX protein, human ; Histones ; TP53BP1 protein, human ; Tumor Suppressor p53-Binding Protein 1
Language	English
Publishing date	2020-01-04
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2527218-4
ISSN	2073-4425 ; 2073-4425
ISSN (online)	2073-4425
ISSN	2073-4425
DOI	10.3390/genes11010058
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Toxicity and SOS response to ELF magnetic field and nalidixic acid in E. coli cells.

Belyaev, Igor

publication RETRACTED

Mutation research

2011 Volume 722, Issue 1, Page(s) 84–88

Abstract: Extremely low frequency (ELF) magnetic fields have previously been shown to affect conformation of chromatin and cell proliferation. Possible genotoxic and carcinogenic effects of ELF have also been discussed and tested. In this study, we analyzed the ... ...

Abstract	Extremely low frequency (ELF) magnetic fields have previously been shown to affect conformation of chromatin and cell proliferation. Possible genotoxic and carcinogenic effects of ELF have also been discussed and tested. In this study, we analyzed the effect of ELF on chromatin conformation in E. coli GE499 cells by the anomalous viscosity time dependence (AVTD) technique. Possible genotoxic ELF effects at the specific combination of static and ELF magnetic fields, that has been proven to have effects on chromatin conformation, were investigated by clonogenic assay, cell growth kinetics, and analysis of SOS-response using inducible recA-lacZ fusion and the β-galactosidase assay. Genotoxic agent nalidixic acid (NAL) was used as positive control and in combination with ELF. Nalidixic acid at 3-30μg/ml decreased the AVTD peaks and induced cytotoxic effect. In contrast to NAL, ELF increased AVTD, stimulated cell growth, and increased cloning efficiency. These effects depended on frequency within the frequency range of 7-11Hz. While NAL induced SOS response, ELF exposure did not induce the recA-lacZ fusion. Exposure to ELF did not modify the genotoxic effects of NAL either. All together, the data show that ELF, under specific conditions of exposure, acted as nontoxic but cell growth stimulating agent.
MeSH term(s)	Cell Proliferation ; Chromatin/chemistry ; DNA Damage ; Electromagnetic Fields ; Escherichia coli/genetics ; Molecular Conformation ; Nalidixic Acid/pharmacology ; SOS Response (Genetics)
Chemical Substances	Chromatin ; Nalidixic Acid (3B91HWA56M)
Language	English
Publishing date	2011-05-18
Publishing country	Netherlands
Document type	Duplicate Publication ; Journal Article ; Research Support, Non-U.S. Gov't ; Retracted Publication
ZDB-ID	206607-5
ISSN	1873-135X ; 0027-5107 ; 1383-5718 ; 0165-1110 ; 0165-1161 ; 0165-7992 ; 0921-8777 ; 0165-1218 ; 1383-5726 ; 0167-8817 ; 0921-8734 ; 1383-5742
ISSN (online)	1873-135X
ISSN	0027-5107 ; 1383-5718 ; 0165-1110 ; 0165-1161 ; 0165-7992 ; 0921-8777 ; 0165-1218 ; 1383-5726 ; 0167-8817 ; 0921-8734 ; 1383-5742
DOI	10.1016/j.mrgentox.2011.03.011
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1316: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

To top

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito