[glycogen-containing cells in the maternal and embryonic portions of the placenta in the rat and the common vole microtus subarvalis].differentiation sequences and further transfiguration of glycogen-rich cells during placenta development were investigated for the rat and field vole microtus subarvalis (11-20 day gestation). the presence of glycogen is a characteristic feature of decidual cells located in the region of lateral sinusoids, as well as of metrial gland cells, secondary giant trophoblast cells and trophoblast cells in the connective zone of placenta. glycogen-containing metrial gland cells and trophoblast cells of ...19883072744
[characteristics of the distribution of dna repetitive sequences in the sex chromosomes of 4 species of rodent].four rodent species with very large heterochromatic regions on the sex chromosomes have been studied using in situ dna/dna hybridization techniques. repetitious dna fractions were obtained at c0t 0-0.01. heterochromatic regions of x and x chromosomes of cricetulus barabensis and phodopus sungorus, and the heterochromatic long arm of the y chromosome of mesocricetus auratus do not contain disproportionately high amounts of repeated dna sequences. heterochromatic regions on sex chromosomes of micr ...19853911513
persistence of francisella tularensis mccoy et chapin tularemia agent in the organism of highly sensitive rodents after oral the literature there are no data on the possibility of obtaining in experiment non-fatal tularemia infection (persistence) in rodents highly sensitive to it (group i) when using highly virulent strains circulating in nature for infection by natural routes. our detailed experiments on 1483 adult voles microtus rossiaemeridionalis ogn. (syn. m. subarvalis meyer et al.) of laboratory origin using virulent strains of francisella tularensis holarctica ols. et meshch. and natural alimentary infecti ...19846396330
[experimental latent tularemia in common voles].common voles (microtus subarvalis) were infected with tularemia by feeding them with the corpses of the animals which had been infected with francisella tularensis strain having somewhat decreased virulence. this resulted in nonlethal infection in 14 out of 433 voles used in the experiment. a considerable part of the animals having had the infection developed bacterial carriership (11 out of 13 animals) with bacteriuria (8 out of 11 animals) lasting up to 2 months. the persistence of francisella ...19827043979
tula virus: a newly detected hantavirus carried by european common voles.a novel hantavirus has been discovered in european common voles, microtus arvalis and microtus rossiaemeridionalis. according to sequencing data for the genomic rna s segment and nucleocapsid protein and data obtained by immunoblotting with a panel of monoclonal antibodies, the virus, designated tula virus, is a distinct novel member of the genus hantavirus. phylogenetic analyses of tula virus indicate that it is most closely related to prospect hill, puumala, and muerto canyon viruses. the resu ...19947966573
demonstration of the x-linkage and order to the genes gla, g6pd, hprt, and pgk in two vole species of the genus microtus.using a variety of genetic methods, it is shown in this paper that the genes gla, g6pd, hprt, and pgk are x-linked in the vole microtus subarvalis. the order of these genes has been investigated in two vole species, m. subarvalis and m. kirgisorum, by using the mapping technique of goss and harris (1977a, b), which depends on the analysis of gamma-ray-induced gene segregation. the experimental data were processed with the computer programme rhmap (ginsburg et al., 1993). the analysis indicated t ...19948258299
organization and chromosomal localization of a b1-like containing repeat of microtus subarvalis.a repetitive dna sequence, ms2, was isolated from ecori-digested genomic dna of the vole, microtus subarvalis. the fragment was cloned and sequenced. sequence analysis of this 1194-bp fragment revealed a 156-bp region demonstrating a 55% homology with the mouse b1 repeat. the remaining ms2 sequence shows no significant homology with other known genbank sequences. the results of in situ hybridization of ms2 on vole metaphase chromosomes indicate the fragment is confined to heterochromatin blocks ...19968678980
association of developmental regulatory genes with the development of different molar tooth shapes in two species of rodents.while the evolutionary history of mammalian tooth shapes is well documented in the fossil record, the developmental basis of their tooth shape evolution is unknown. we investigated the expression patterns of eight developmental regulatory genes in two species of rodents with different molar morphologies (mouse, mus musculus and sibling vole, microtus rossiaemeridionalis). the genes bmp-2, bmp-4, fgf-4 and shh encode signal molecules, lef-1, msx-1 and msx-2, are transcription factors and p21cip1/ ...19989799429
[statistical methods of radiation hybrid mapping: analysis of a small number of genes].a statistical method for radiation hybrid (rh) mapping of a small number of genes detected in clones by means of isozyme analysis is suggested. this method allows analytical solution of the problem of gene ordering and qualitative comparison of relative distances between the genes that are being mapped. the possibilities offered by the suggested method are illustrated using earlier data on the distribution of four isozyme markers in human and vole (microtus rossiaemeridionalis) clones. these mar ...199910368789
gene expression patterns associated with suppression of odontogenesis in mouse and vole diastema regions.rodents have a toothless diastema region between the incisor and molar teeth which may contain rudimentary tooth germs. we found in upper diastema region of the mouse (mus musculus) three small tooth germs which developed into early bud stage before their apoptotic removal, while the sibling vole (microtus rossiaemeridionalis) had only a single but larger tooth germ in this region, and this developed into late bud stage before regressing apoptotically. to analyze the genetic mechanisms of the de ...199910415326
[the ecology of the sibling species microtus arvalis pallas, 1779 and microtus rossiaemeridionalis ognev, 1924 (rodentia, cricetidae) in the tsimlianskie sands].ecological features and circadian activity of the common vole sibling species were studied upon joint and separate occurrences. both species had a similar abundance but different biotopical distribution. microtus arvalis--chromosome form "obscurus" populated the studied territory more uniformly the studied territory. m. rossiaemeridionalis tended to occur in humid coenoses. in case of joint occurrences, the sibling species occupied different regions of biotopes and the rhythms of their activity ...199910441910
the vole species microtus arvalis and microtus rossiaemeridionalis in the urals: hybridization in the wild. 200010781329
[chromosomal and ontogenetic instability in sibling species of common vole (microtus arvalis group): comparative aspects].populations of chromosomal sibling species microtus arvalis and microtus rossiaemeridionalis were studied in ural region in habitats affected by high radiation and the control ones. frequency of chromosome disturbances in the marrow cells and fluctuating asymmetry (fa) of 8 craniometric characters were investigated. in impact populations the frequency of chromosome aberration was very high. such frequency was also maintained in the offspring of the first laboratory generation of m. arvalis. in n ...200111548401
echinococcus multilocularis on svalbard: introduction of an intermediate host has enabled the local life-cycle.the taeniid tapeworm echinococcus multilocularis is here reported for the first time at the svalbard archipelago in the norwegian arctic. this new finding is interesting because the establishment of e. multilocularis is due to a recent anthropogenic introduction of its intermediate host--the sibling vole microtus rossiaemeridionalis at svalbard. the parasite itself has probably become naturally transferred to svalbard due to migratory movements of its final host--the arctic fox alopex lagopus be ...200111814041
[quantitative investigation of reproduction of condensed chromatin of sex chromosomes during trophoblast cell polyploidization and endoreduplication in the east european field vole microtus rossiaemeridionalis].simultaneous measurement of dna content in cell nuclei and condensed chromatin bodies formed by heterochromatized regions of sex chromosomes (gonosomal chromatin bodies, gcb) has been performed in two trophoblast cell populations of the east-european field vole microtus rossiaemeridionalis, namely in the proliferative population of trophoblast cells of the junctional zone of placenta and in the secondary giant trophoblast cells. one or two gonosomal chromatin bodies have been observed in trophob ...200212506668
[isolation of es-like lines of common voles of the genus microtus from blastocysts and germ cells and as a result of the fusion of somatic cells with mouse embryonic stem cells].three and four independent cell lines with limited pluripotency were obtained from the inner cell mass cells of blastocysts and primordial germ cells of common voles, respectively. the results of cytogenetic analysis suggest that all these lines originated from the embryos of f1 microtus rossiaemeridionalis x m. arvalis males and had a great number of near-triploid cells already during the early passages. the cells of these lines, like those of the inner cell mass, were characterized by the alka ...200312816050
seroepidemiology of borrelia burgdorferi sensu lato and anaplasma phagocytophilum in wild mice captured in northern expedition across the asian part of the black sea coast and national parks of northern turkey was organized in the summer of 2001 to investigate the presence of borrelia burgdorferi sensu lato (s.l.), lyme borreliosis agent, and anaplasma phagocytophilum, human granulocytic ehrlichiosis, agent, in wild mice. a total of 65 apodemus flavicollis, apodemus sylvaticus, microtus epiroticus, crocidura suaveolens and mus macedonicus, were captured. two out of 22 apodemus sylvaticus specimens were ser ...200515816159
[certain aspects of interactions between cohabiting sibling species microtus arvalis and m. rossiaemeridionalis].some aspects of interspecific interactions between sibling species of common vole were studied at the chernogolovka scientific research station (severtsov institute for problems of ecology and evolution, russian academy of sciences) from 1992 to 2001. in the marking plot and indoors, east european vole demonstrated high tolerance to the anthropogenic stress considering that it was the most abundant species in the studied area transformed by human economic activity and that it used buildings as t ...200616521541
serological survey for viral pathogens in turkish rodents.wild rodents (n = 330) were trapped around the villages of altindere and coşandere (maçka, trabzon province), ayder, ortan, and yolkiyi (camlihemşin, rize province), and bozdag (odemiş, izmir province) in northeastern and western turkey during april 2004. samples were tested for arenavirus, hantavirus, and cowpox virus (family poxviridae, genus orthopoxvirus, cpxv) antibodies by using immunofluorescence assays (ifas). antibodies against arenaviruses were found in eight of 330 (2.4%) rodents. are ...200617092901
serosurvey for toxoplasma gondii in arctic foxes and possible sources of infection in the high arctic of svalbard.samples (blood or tissue fluid) from 594 arctic foxes (alopex lagopus), 390 svalbard reindeer (rangifer tarandus platyrhynchus), 361 sibling voles (microtus rossiaemeridionalis), 17 walruses (odobenus rosmarus), 149 barnacle geese (branta leucopsis), 58 kittiwakes (rissa tridactyla), and 27 glaucous gulls (larus hyperboreus) from svalbard and nearby waters were assayed for antibodies against toxoplasma gondii using a direct agglutination test. the proportion of seropositive animals was 43% in ar ...200717950534
structure and expression pattern of oct4 gene are conserved in vole microtus rossiaemeridionalis.oct4 is a pou-domain transcriptional factor which is essential for maintaining pluripotency in several mammalian species. the mouse, human, and bovine oct4 orthologs display a high conservation of nucleotide sequence and genomic organization.200818402712
first molecular evidence of tula hantavirus in microtus voles in slovenia.different microtus species, present in a worldwide range habitat populating north america, europe, asia, and few other species have been recognized previously as a hantavirus reservoir. tula hantavirus was first reported in microtus arvalis and microtus rossiaemeridionalis from central russia and later discovered in several european countries. using molecular techniques we have demonstrated the presence of tula hantavirus in three different microtus species in slovenia. phylogenetic analyses of ...200919410611
effect of odor of commensal house mice on the reproduction of the pine vole microtus rossiaemeridionalis. 200919650326
intestinal parasites of the arctic fox in relation to the abundance and distribution of intermediate hosts.the intestinal parasite community of arctic foxes (vulpes lagopus) on the svalbard archipelago in the high arctic was investigated in relation to the abundance and distribution of intermediate hosts. five species of cestodes (echinococcus multilocularis, taenia crassiceps, taenia polyacantha, taenia krabbei and diphyllobothrium sp.), ascaridoid nematodes and one unidentified acanthocephalan species were found. the cestodes e. multilocularis, t. crassiceps and t. polyacantha all showed a decreasi ...201019723357
[molecular genetic characterization of the regulatory region of the xist gene in the common vole microtus rossiaemeridionalis].two conserved regions were discovered as a result of interspecific comparison of the 5'-region of the xist gene, which is the key gene in the process of x-chromosome inactivation in mammalian females. the first region corresponds to the minimal promoter, and the second spans between -480 bp and -400 bp from the start of xist transcription. footprinting experiments revealed protected regions corresponding to the potential binding sites for tbp, sp1, api, sry, er, and some other transcription fact ...200919947545
[expression of early developmental genes in vole microtus rossiaemeridionalis].the expression of genes sox2, klf4, myc, sall4, gata6, foxa2, hnf4a, cdx2, esrrb, hand1 in cultivated cells, embryos and organs of adult voles microtus rossiaemeridionalis was studied. high resemblance of the expression patterns of these genes in the organs of adult voles, mice and humans was demonstrated. it was established that genes gata6, foxa2 and hnf4a were specifically expressed in vole extraembryonic endoderm cells, while cdx2 and handl genes, in trophoblast stem cells. this shows that t ...201020297663
a regulatory potential of the xist gene promoter in vole m. rossiaemeridionalis.x chromosome inactivation takes place in the early development of female mammals and depends on the xist gene expression. the mechanisms of xist expression regulation have not been well understood so far. in this work, we compared xist promoter region of vole microtus rossiaemeridionalis and other mammalian species. we observed three conserved regions which were characterized by computational analysis, dnasei in vitro footprinting, and reporter construct assay. regulatory factors potentially inv ...201222606223
susceptibility of muridae cell lines to ecotropic murine leukemia virus and the cationic amino acid transporter 1 viral receptor sequences: implications for evolution of the viral receptor.ecotropic murine leukemia viruses (eco-mlvs) infect mouse and rat, but not other mammalian cells, and gain access for infection through binding the cationic amino acid transporter 1 (cat1). glycosylation of the rat and hamster cat1s inhibits eco-mlv infection, and treatment of rat and hamster cells with a glycosylation inhibitor, tunicamycin, enhances eco-mlv infection. although the mouse cat1 is also glycosylated, it does not inhibit eco-mlv infection. comparison of amino acid sequences between ...201424469466
tula virus infections in the eurasian water vole in central europe.recent reports of novel hantaviruses in shrews and moles and the detection of rodent-borne hantaviruses in different rodent species raise important questions about their host range and specificity, evolution, and host adaptation. tula virus (tulv), a european hantavirus, is believed to be slightly or non-pathogenic in humans and was initially detected in the common vole microtus arvalis, the east european vole m. levis (formerly rossiaemeridionalis), and subsequently in other microtus species. h ...201222225425
effects of predator removal on vertebrate prey populations: birds of prey and small mammals.we studied the effects of removal of breeding nomadic avian predators (the kestrel, falco tinnunculus and tengmalm's owl, aegolius funereus) on small mammals (voles of the genera microtus and clethrionomys and the common shrew, sorex araneus) during 1989-1992 in western finland to find out if these predators have a regulating or limiting impact on their prey populations. we removed potential breeding sites of raptors from five manipulation areas (c. 3 km(2) each), whereas control areas had nest- ...199528306779
induced pluripotent stem cells of microtus levis x microtus arvalis vole hybrids: conditions necessary for their generation and self-renewal.every year, the list of mammalian species for which cultures of pluripotent stem cells (pscs) are generated increases. pscs are a unique tool for extending the limits of experimental studies and modeling different biological processes. in this work, induced pluripotent stem cells (ipscs) from the hybrids of common voles microtus levis and microtus arvalis, which are used as model objects to study genome organization on the molecular-genetic level and the mechanisms of x-chromosome inactivation, ...201726798492
fungal-mediated multitrophic interactions--do grass endophytes in diet protect voles from predators?plant-associated micro-organisms such as mycotoxin-producing endophytes commonly have direct negative effects on herbivores. these effects may be carried over to natural enemies of the herbivores, but this has been rarely explored. we examined how feeding on neotyphodium endophyte infected (e+) and endophyte free (e-) meadow ryegrass (scherodonus pratensis) affects body mass, population size and mobility of sibling voles (microtus levis), and whether the diet mediates the vulnerability of voles ...201020352096
[feeding rate of sibling vole microtus rossiaemeridionalis and mandarin vole lasiopodomys mandarinus].consumption of food of different nutritive value by sibling vole microtus rossiaemeridionalis and mandarin vole lasiopodomys mandarinus as a function of housing conditions--in cages or enclosures--was comparatively studied. experimental groups included 8-14 adult non-reproducing animals of both sexes kept one per cage or enclosure. the rate of food consumption and digestibility were studied by standard methods and the obtained data were statistically analyzed using statistica 6.0. significant di ...201617853693
invasion and genome reproduction of the trophoblast cells of placenta junctional zone in the field vole, microtus the field vole microtus rossiaemeridionalis, like in other rodents, invasive secondary giant trophoblast cells (sgtc) form a continuous layer at the foeto-maternal interface in the beginning of placentation. however, in the field vole, at midgestation, clusters of junctional zone (jz) trophoblast non-giant cells interrupt sgtc layer and progressively replace sgtc at the border of decidua basalis. as a result, 'border' cells form a continuous stratum of cytokeratin-positive glycogen-rich cells ...201424155276
[functional features of microbial communities in the digestive tract of field voles (microtus rossiaemeridionalis and clethrionomys glareolus)].the nitrogen-fixating and cellobiohydrolase activity, the nitrogen (n) and carbon (c) contents, and the number of microorganisms in the prestomach, cecum, and colon of two vole species were studied: the southern vole (microtus rossiaemeridionalis) and the bank vole (clethrionomys glareolus), which is characterized by a mixed type of diet. the nitrogen-fixating activity in the cecum was found to be the highest in the voles compared with the mammals studied earlier. the seasonal dynamics of both n ...201622988758
endopolyploidization and the interstitial invasion of the supergiant trophoblast cells of the field vole microtus rossiaemeridionalis.the supergiant trophoblast cells characteristic of vole placenta prove to be highly invasive being found at the boundary of the decidualized endometrium and myometrium. their size (100 microm and higher) suggests them to be highly polyploid, though their ploidy was not determined by now. we performed determination of the ploidy level of the supergiant trophoblast cells (sugt) in order to verify whether the highly polyploid trophoblast cells are capable of deep intrauterine invasion. anti-cytoker ...200919329135
[a study of dna depolyploidization and depolytenization of the heterochromatized gonosomal chromatin bodies in the secondary giant trophoblast cells of the field vole microtus rossiaemeridionalis using cytophotometry].a study was made of the distribution of the heterochromatized gonosomal chromatin bodies (gcb) material in the course of nuclear fragmentation of secondary giant trophoblast cells resulting in polykaryocyte formation at the late stage of their differentiation. a simultaneous dna cytophotometry in gcbs and nuclear fragments showed a progressive gcb dna content decrease proportional to that of dna content in nuclear fragments. dna contents in the nuclear fragments corresponded to 2c, 4c and 8c. in ...200516711385
whole-genome chromosome distribution during nuclear fragmentation of giant trophoblast cells of microtus rossiaemeridionalis studied with the use of gonosomal chromatin arrangement.gonosomal chromatin bodies (gcbs), i.e. blocks of condensed chromatin consisting of heterochromatized region of the sex chromosomes of the field vole m. rossiaemeridionalis, were used as a natural interphase chromosome marker in order to clarify the regularities of gcb rearrangement during nuclear fragmentation of secondary giant trophoblast cells (sgtcs) at the end of their differentiation. cytophotometrical measurements of dna content in the nuclei, nuclear fragments and simultaneously in the ...200516314124
quantitative investigation of reproduction of gonosomal condensed chromatin during trophoblast cell polyploidization and endoreduplication in the east-european field vole microtus rossiaemeridionalis.simultaneous determinations of dna content in cell nuclei and condensed chromatin bodies formed by heterochromatized regions of sex chromosomes (gonosomal chromatin bodies, gcb) have been performed in two trophoblast cell populations of the east-european field vole microtus rossiaemeridionalis: in the proliferative population of trophoblast cells of the junctional zone of placenta and in the secondary giant trophoblast cells. one or two gcbs have been observed in trophoblast cell nuclei of all e ...200312725646
presence of the 54-chromosome common vole (mammalia) on olkhon island (lake baikal, east siberia, russia), and the occurrence of an unusual x-chromosome variant.we report a new finding of the 54-chromosome sibling species of the common vole in east siberia - the first description from olkhon island (lake baikal). the karyotype of a male specimen revealed by routine staining and c-banding demonstrates the unambiguous presence of microtus rossiaemeridionalis ognev, 1924 (recently often regarded as as junior synonym of microtus levis miller, 1908). comparison with conspecific specimens from the european part of the species range (from the left bank of the ...201124260647
changes in the common vole (microtus arvalis) and east european vole (microtus rossiaemeridionalis) social behavior after combining conspecific groups. 201619760885
repetitive dna sequences in the common vole: cloning, characterization and chromosome localization of two novel complex repeats ms3 and ms4 from the genome of the east european vole microtus rossiaemeridionalis.we have characterized two novel, complex, heterochromatic repeat sequences, ms3 and ms4, isolated from microtus rossiaemeridionalis genomic dna. sequence analysis indicates that both repeats consist of unique sequences interrupted by repeat elements of different origin and can be classified as long complex repeat units (lcrus). a unique feature of both repeat units is the presence of short interspersed repeat elements (sines), which are usually characteristic of the euchromatic part of the genom ...19989872664
an estimation of the degree of the genetic divergence of sibling species microtus arvalis and microtus subarvalis (rodentia) based on electrophoretic analysis.the electrophoretic mobilities of 52 enzymes and proteins were used as measures of the genetic similarity between the sibling species microtus arvalis and m. subarvalis. the two vole species differed in the electrophoretic mobilities of seven (glucose-6-phosphate dehydrogenase, adenylate kinase, diaphorase, lactate dehydrogenase-a, alpha-galactosidase, 6-phosphogluconate dehydrogenase, and hemoglobin) of these markers. this allowed us to accept the seven markers assayed as species-specific marke ...19846397194
[evaluation of the degree of genetic divergence in the twin species of the common vole microtus arvalis and microtus subarvalis (rodentia)].by means of starch electrophoresis, 52 proteins and enzymes of microtus arvalis and m. subarvalis were studied to establish the extent of their similarity. out of 52 markers studied, 7 proteins and enzymes had different electrophoretic mobility: glucose-6-phosphate dehydrogenase (g6pd), phosphogluconate dehydrogenase (pgd), diaphorase (dp), adenylate kinase (ak), lactate dehydrogenase b (ldhb), alpha-galactosidase (gal) and hemoglobin (hb), which make up to 13% of all the enzymes and proteins st ...19846386603
the first complete mitochondrial genome of the microtus ochrogaster.microtus ochrogaster, a small vole, found in central north america. recently the genome sequencing had been done, but no more information of its mitochondrial reported. herein, we first assembled the complete mitochondrial genome sequence of microtus ochrogaster. it is a 16 292 bp long sequence with most mitogenome's characteristic structure, 13 protein-coding genes, two of rrna genes, 22 of trna genes, one d-loop region, one repeat region, and three sts regions. the gc-content of our fresh sequ ...201626305486
complete mitochondrial genome sequence of the chinese scrub vole (neodon irene).the chinese scrub vole (neodon irene) belongs to the subfamily arvicolinae, which is restricted to mountain areas at high altitudes (2800-4000). in this study, we sequenced the complete mitochondrial genome of n. irene. it was determined to be 16,367 bases. the nucleotide sequence data of 12 heavy-strand protein-coding genes of n. irene and other 22 rodents were used for phylogenetic analysis. bayesian inference (bi) and maximum likelihood (ml) were used. both the bi and ml trees demonstrated th ...201121864030
accelerated molecular evolution in microtus (rodentia) as assessed via complete mitochondrial genome sequences.microtus is one of the most taxonomically diverse mammalian genera, including over 60 extant species. these rodents have evolved rapidly, as the genus originated less than 2 million years ago. if these numbers are taken at face value, then an average of 30 microtine speciation events have occurred every million years. one explanation for the rapid rate of cladogenesis in microtus could be the karyotypic differentiation exhibited across the genus: diploid numbers range from 17 to 64. despite the ...200617028943
impact of xist rna on chromatin modifications and transcriptional silencing maintenance at different stages of imprinted x chromosome inactivation in vole microtus vole microtus levis, cells of preimplantation embryo and extraembryonic tissues undergo imprinted x chromosome inactivation (ixci) which is triggered by a long non-coding nuclear rna, xist. at early stages of ixci, chromatin of vole inactive x chromosome is enriched with the hp1 heterochromatin-specific protein, trimethylated h3k9 and h4k20 attributable to constitutive heterochromatin. in the study, using vole trophoblast stem (ts) cells as a model of ixci, we further investigated chromatin o ...201729151149
correction: mapping of replication origins in the x inactivation center of vole microtus levis reveals extended replication initiation zone. 201526115540
mapping of replication origins in the x inactivation center of vole microtus levis reveals extended replication initiation zone.dna replication initiates at specific positions termed replication origins. genome-wide studies of human replication origins have shown that origins are organized into replication initiation zones. however, only few replication initiation zones have been described so far. moreover, few origins were mapped in other mammalian species besides human and mouse. here we analyzed pattern of short nascent strands in the x inactivation center (xic) of vole microtus levis in fibroblasts, trophoblast stem ...201526038842
[experimental hybridization of voies of the genus microtus s.l. m. socialis with species of the group arvalis (mammalia, rodentia)].the results of interspecific crosses of the social vole microtus socialis with the altai vole m. obscurus, the east european vole m. rossiaemeridionalis, and the transcaspian vole m. transcaspicus are presented. the role of the sperm head structure in the reproductive isolation of this species was studied. hybrids were obtained in five of the six crossing combinations. it is established that significant differences in the sperm head shape in the social vole and in arvalis group species do not pr ...201625739313
diazotrophic and cellulolytic component of the internal food chains in the voles microtus rossiaemeridionalis and clethrionomys glareolus depending on the feeding specialization. 201424795192
molecular and cytogenetic evidence for the occurrence of the east european vole microtus rossiaemeridionalis (arvicolinae, rodentia) in the north of west siberia. 201424795189
dynamics of the two heterochromatin types during imprinted x chromosome inactivation in vole microtus rodent female mammals, there are two forms of x-inactivation - imprinted and random which take place in extraembryonic and embryonic tissues, respectively. the inactive x-chromosome during random x-inactivation was shown to contain two types of facultative heterochromatin that alternate and do not overlap. however, chromatin structure of the inactive x-chromosome during imprinted x-inactivation, especially at early stages, is still not well understood. in this work, we studied chromatin modif ...201424505450
[biological activity of soils in the settlements of southern (microtus rossiaemeridionalis) and bank (clethrionomys glareolus) voles].the effect of southern (microtus rossiaemeridionalis) and bank (clethrionomys glareolus) voles on the biological activity of soddy-podzolic soil and culturozem has been studied. to estimate this effect, the activity of nitrogen and carbon transformation in the soil taken from the paths and different chambers of the holes of these rodents, as well as from the control plots where there were no voles, has been determined. the contents of organic carbon and nitrogen in the soil have been found. the ...201724459855
morphotype analysis of the sibling vole (microtus rossiaemeridionalis) casually introduced to the russian far, we present the morphotypic variety of the m1 and m3 teeth diagnostics for the recently formed isolated population of the sibling vole in far eastern russia. in the far eastern population, the prevalence of the individuals with m1 with a complicated crown of the forward unpaired loop of the paraconid is characteristic. namely, m1 in these individuals shows well-expressed sixth exterior and fifth interior salient angles. the structure of the m3 morphotypes is also unique in the sibling voles ...201323293375
congruent responses to weather variability in high arctic herbivores.assessing the role of weather in the dynamics of wildlife populations is a pressing task in the face of rapid environmental change. rodents and ruminants are abundant herbivore species in most arctic ecosystems, many of which are experiencing particularly rapid climate change. their different life-history characteristics, with the exception of their trophic position, suggest that they should show different responses to environmental variation. here we show that the only mammalian herbivores on t ...201223015455
[investigation of the tsix gene regulatory region in vole microtus rossiaemeridionalis].the tsix regulatory region was examined in vole microtus rossiaemeridionalis. the minimal promoter region, three potential enhancer regulatory elements and one transcription suppressor element were identified. the enhancer regions contained potential binding sites of transcription activators, while in the region of putative silencer contained potential binding site of the arp1 (nr2f2) protein. this protein can play the role of either activator or repressor depending on the promoter context.201021254563
mosaic heterochromatin of the inactive x chromosome in vole microtus rossiaemeridionalis.during early development in female mammals, one of the two x chromosomes recruits a variety of protein complexes that establish repressive chromatin modifications and thus becomes transcriptionally silenced. this process is termed x chromosome inactivation (xci). imprinted xci of the paternal x chromosome occurs in the extraembryonic lineages of some eutherian species (e.g., rodents). in the cells of the embryo proper, the choice of the x chromosome for xci is random. in this study we compared t ...201719629595
nanog gene: genomic organization and expression in the vole microtus rossiaemeridionalis. 201719496333
extensive mitochondrial dna transfer in a rapidly evolving rodent has been mediated by independent insertion events and by duplications.mitochondrial dna translocations to the nucleus (numt pseudogenes) are pervasive among eukaryotes, but copy number within the nuclear genome varies widely among taxa. as an increasing number of genomes are sequenced in their entirety, the origins, transfer mechanisms and insertion sites of numts are slowly being characterized. we investigated mitochondrial transfers within a genetically diverse rodent lineage and here report 15 numts totaling 21.8 kb that are harbored within the nuclear genome o ...200717714890
molecular analyses of mitochondrial pseudogenes within the nuclear genome of arvicoline rodents.nuclear sequences of mitochondrial origin (numts) are common among animals and plants. the mechanism(s) by which numts transfer from the mitochondrion to the nucleus is uncertain, but their insertions may be mediated in part by chromosomal repair mechanisms. if so, then lineages where chromosomal rearrangements are common should be good models for the study of numt evolution. arvicoline rodents are known for their karyotypic plasticity and numt pseudogenes have been discovered in this group. her ...200817333478
[nitrogen requirements of microtus rossiaemeridionalis].total nitrogen requirements in the small herbivorous rodent microtus rossiaemeridionalis were studied. when provided with two kinds of standard laboratory food (about 20 and 0% digestible protein, respectively) ad libitum (cafeteria diet), the voles chose a diet of 14% protein. the total daily (with urine and faeces) nitrogen losses were, in this case, determined as 3.65 +/- 0. 60 mg n/g of body mass. when provided with a protein-free diet alone, the animals lost 0.90 +/- 0.05 mg n/g body mass p ...201615926320
[effect of deficiency of dietary nitrogen on cellulose digestibility and nitrogen-fixing flora activity in the sibling vole microtus rossiaemeridionalis].the effect of food composition on nitrogen-fixing activity of the symbionts living in the digestive tract of the sibling vole microtus rossiaemeridionalis was experimentally studied. in the control, the rodents were allowed to select any of three food mixes: protein-rich, protein-free with low cellulose content, and protein-free with high cellulose content. the voles consumed the food in a proportion corresponding to 16% of protein and about 6% of cellulose. exclusion of the protein-rich food co ...201715559132
various organizations of the complex repeats in vole sex chromosome heterochromatin.different patterns of the dna sequences organization were revealed in the vole (rodentia) sex chromosome heterochromatin using dual-label fluorescence in-situ hybridization on extended dna fibers with different repetitive dna sequences as probes. in microtus rossiaemeridionalis, the basic type represents the homogeneous relatively short tracks consisting of tandemly reiterated monomers of the ms3 family alternating with similar tracks of ms4 monomers and with non-fluorescent spacers. these track ...200314712862
reproductive features of the russian vole in laboratory breeding.reproductive features of newly bred russian voles (microtus rossiaemeridionalis) as a laboratory animal were studied. this species is a copulatory ovulator, and most couples copulated 6 to 16 h after pairing. the gestation period varied from 18 to 22 days (mean +/- sd: 20.6 +/- 0.9, n = 72), and the average litter size was 4.6 +/- 1.9 (n = 125). compared with the litter size at the first parturition (3.6 +/- 1.6, n = 72), the litter size in the subsequent parturitions increased to 5.9 +/- 1.4 (n ...200314562609
[high-resolution gtg-banding and nucleolar organizer regions of chromosomes of two vole species: microtus rossiaemeridonionalis and m. transcaspicus (rodentia, arvicolidae)].with the use of the gtg-banding of prometaphase chromosomes, 503 and 402 segments were revealed in haploid chromosome sets of voles microtus rossiaemeridionalis and m. transcaspicus, respectively. based on a detailed study of chromosomes at different condensation levels, idiograms of m. rossiaemeridionalis and m. transcaspicus chromosomes were constructed. sequential ag-staining and gtg-banding allowed nucleolar organizer regions (nors) to be localized in 16 and 11 chromosome pairs of m. rossiae ...19989777354
[morphometry of synaptonemal complexes of the eastern european vole, microtus rossiaemeridionalis (rodentia, mammalia)]. 19989719897
editorial comment on the nomenclature of the east european vole. 19958598351
high-resolution g-banding of chromosomes in microtus subarvalis (rodentia, arvicolidae)karyotypes of six females and four males of the east european vole (microtus subarvalis) were prepared from spleen cell cultures. g-banding of early metaphase chromosomes has allowed us to distinguish 488 bands in the haploid set of chromosomes of m. subarvalis. based on the detailed study of chromosomes at various levels of condensation, an idiogram has been built up for the chromosomes of the east european vole.19958598345
[establishment of linkage and the order of the genes gala, g6pd, hprt and pgk on the x-chromosome in two species of voles of the genus microtus].localization of genes gala, g6pd, hprt and pgk on x-chromosome of microtus subarvalis has been proved. using the radiation hybrid mapping technique of goss and harris, the order of these genes for two species m. subarvalis and m. kirgisorum was established. statistical methods (program package rhmap) result in the only gene order pkg--hprt--g6pd--gala for m. subarvalis. the same order was found to be the most probable for m. kirgisorum. relative distances between these genes in two species appea ...19938307370
line-1 element in the vole microtus subarvalis. 19938268664
[the l1-element of the vole, microtus subarvalis]. 19921330466
[polyteny and endomitosis in supergiant trophoblast cells of the gray vole microtus subarvalis].a cytomorphological study was made of peculiarly structured polytene chromosomes in supergiant trophoblast cells of microtus subarvalis. the polyteny level was extremely high (over 1024c). the polytene chromosomes are characterized by a rather high degree of condensation of single chromosomes, and, as a consequence, close chromosome junctions and the typical disk pattern are lacking. the presence of complex nucleoli in the nuclei of these cells also testifies to a great detachment of chromonemes ...19853890305
small terrestrial mammals of albania: distribution and diversity (mammalia, eulipotyphla, rodentia).in this paper new records are reported for 23 species of small terrestrial mammals (stm) of albania collected during the field work campaigns organised in the framework of the project "strengthening capacity in national nature protection - preparation for natura 2000 network" (natural) in albania during the summer and autumn of 2016 and 2017 data on small mammals were primarily collected through sherman live-trapping campaigns in six high priority protected areas of albania: korab-koritnik, bred ...201829670434
assisted reproductive technologies in microtus genus.microtus genus is one of the experimental animals showing unique characteristics, and some species have been used as various research models. in order to advance the utilization of microtus genus, the development of assisted reproductive technologies (arts) is a key point. this review introduces recent progress in the development of arts for microtus genus, especially microtus montebelli (japanese field vole).201930996675
gonads or body? differences in gonadal and somatic photoperiodic growth response in two vole optimally time reproduction, seasonal mammals use a photoperiodic neuroendocrine system (pnes) that measures photoperiod and subsequently drives reproduction. to adapt to late spring arrival at northern latitudes, a lower photoperiodic sensitivity and therefore a higher critical photoperiod for reproductive onset is necessary in northern species to arrest reproductive development until spring onset. temperature-photoperiod relationships, and hence food availability-photoperiod relationships, ...202032917818
gastrointestinal parasites of arctic foxes (vulpes lagopus) and sibling voles (microtus levis) in spitsbergen, svalbard.the arctic fox (vulpes lagopus), an apex predator with an omnipresent distribution in the arctic, is a potential source of intestinal parasites that may endanger people and pet animals such as dogs, thus posing a health risk. non-invasive methods, such as coprology, are often the only option when studying wildlife parasitic fauna. however, the detection and identification of parasites are significantly enhanced when used in combination with methods of molecular biology. using both approaches, we ...201931729572
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