Consulta: subjectFacets:"Invasion"
Registros recuperados: 36
Data/hora: 14/06/2024 06:30:40

Weed Control as a Rationale for Restoration: The Example of Tallgrass Prairie
Provedor de dados: 7
Autores: Blumenthal, Dana M; University of Minnesota; dblumenthal@npa.ars.usda.gov; Jordan, Nicholas R; University of Minnesota; perr0128@tc.umn.edu; Svenson, Elizabeth L; University of Minnesota; esvenso1@swarthmore.edu.
The potential weed control benefits of ecological restoration are rarely cited and largely unstudied. Nevertheless, the nature of many restoration target communities, i.e., diverse, late-successional communities, suggests that restoration may control weeds and that the invasibility of plant communities may decrease with both diversity and successional age. Given the high cost of weed control in nonagricultural land, weed control benefits could be a strong incentive for restoration efforts. We examined the cumulative effects of restoration on weed populations 7 yr after tallgrass prairie restoration on a Minnesota sand plain. The numbers and biomass of volunteer weeds were compared among randomized plots with (1) no restoration, (2) prairie seed addition,...
Tipo: Peer-Reviewed Reports
Palavras-chave: Community invasibility; Invasion; Prairie; Restoration; Succession; Weed competition; Weed control; Weeds.
Ano: 2003

Novelty, Adaptive Capacity, and Resilience
Provedor de dados: 7
Autores: Allen, Craig R; U.S. Geological Survey, Nebraska Cooperative Fish and Wildlife Research Unit; allencr@unl.edu; Holling, C. S.; Department of Zoology, University of Florida; holling@zoo.ufl.edu.
We present a conceptual framework that explores some of the forces creating innovation and novelty in complex systems. Understanding the sources of variability and novelty may help us better understand complex systems. Understanding complex phenomena such as invasions, migration, and nomadism may provide insight into the structure of ecosystems and other complex systems, and aid our attempts to cope with and mitigate these phenomena, in the case of invasions, and better understand and or predict them. Our model is broadly applicable to ecological theory, including community ecology, resilience, restoration, and policy. Characterizing the link between landscape change and the composition of species communities may help policymakers in their decision-making...
Tipo: Peer-Reviewed Insight
Palavras-chave: Adaptation; Cross-scale; Extinction; Innovation; Invasion; Speciation.
Ano: 2010

Invasion of Matrix Species in Small Habitat Patches
Provedor de dados: 7
The diversity, expressed as species richness in equal-sized samples, of wood-living beetles in successional stages of deciduous forest after forest fires approximately 100 years ago did not differ between patch sizes in this study. Thus, the crucial question for conservation is whether the lack of reduction in diversity in small patches means that a number of small patches can elevate the regional diversity as efficiently as can one larger area. In the present study, the smaller patches did not differ from larger patches in substrate availability, quality, or heterogeneity. The frequency of a group of species was measured as the number of occurrences, viz. the number of trees on which a species was found, summed over all species in the group. The number of...
Tipo: Peer-Reviewed Reports
Palavras-chave: Alpha (local) diversity; Beta (between-habitats) diversity; Deciduous forest; Disturbance; Diversity; Fire; Gamma (regional) diversity; Invasion; Matrix habitat; Patch size; Species-richness.
Ano: 1999

The Effects of Urban Sprawl on Birds at Multiple Levels of Biological Organization
Provedor de dados: 7
Autores: Blair, Robert; University of Minnesota; blairrb@umn.edu.
Urban sprawl affects the environment in myriad ways and at multiple levels of biological organization. In this paper I explore the effects of sprawl on native bird communities by comparing the occurrence of birds along gradients of urban land use in southwestern Ohio and northern California and by examining patterns at the individual, species, community, landscape, and continental levels. I do this by assessing the distribution and abundance of all bird species occupying sites of differing land-use intensity in Ohio and California. Additionally, I conducted predation experiments using artificial nests, tracked the nest fate of American Robins and Northern Cardinals, and assessed land cover in these sites. At the individual level, predation on artificial...
Tipo: Peer-Reviewed Reports
Palavras-chave: Avian community; California; Cardinalis cardinalis; Extinction; Faunal homogenization; Invasion; Landscape heterogeneity; Nesting success; Ohio; Predation; Turdus migratorius; Urbanization.
Ano: 2004

A preliminary analysis of death cause, capture-related mortality, and survival of adult red deer in northwestern Patagonia
Provedor de dados: 67
Autores: Flueck,Werner T; Smith-Flueck,Joanne M; Bonino,Never A.
The red deer (Cervus elaphus), among the world´s 14 most invasive exotic mammals, has recently arrived in Patagonia. Forty-seven deer were captured, marked with radio collars, and monitored in order to determine survival rates and identify causes of death. Net gunning from a helicopter allowed captures to be evenly distributed through the study area and in a timely manner. The absence of capture related mortality in our study agrees with previously reported low rates for this method. Animals were monitored for periods ranging from 5 to 2611 days. Ten animals provided censored values due to radio failures or being shot: they survived on average 811 days (SE = 221) after capture. Ten animals experienced natural deaths with an average time alive after capture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasion; Cervus elaphus; Puma concolor; Predation; Disease; Radio telemetry; Population dynamics; Capture by net gunning.
Ano: 2005
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2005000100004

Relationship between fragmentation, degradation and native and exotic species richness in an Andean temperate forest of Chile
Provedor de dados: 73
Autores: ROJAS,ISABEL; BECERRA,PABLO; GÁLVEZ,NICOLÁS; LAKER,JERRY; BONACIC,CRISTIÁN; HESTER,ALISON.
Human impact such as forest fragmentation and degradation may have strong effects on native and exotic plant communities. In addition, these human-caused disturbances occur mostly in lowlands producing greater fragmentation and degradation there than in higher elevations. Plant invasion should be greater in more fragmented and degraded forests and hence lowlands should be more invaded than higher elevations. In turn, native species richness should be negatively related to fragmentation and degradation and hence greater in higher elevations within a forest type or elevation belt. We assessed these hypotheses in an Andean temperate forest of southern Chile, Araucanía Region. We recorded the vascular plant composition in twelve fragments of different size,...
Tipo: Journal article
Palavras-chave: Fragmentation; Forest degradation; Elevation gradient; Invasion; Plant diversity.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000200006

Проблема переноса водных организмов судами и некоторые подходы к оценке риска новых инвазий
Provedor de dados: 13
Autores: Александров, Б. Г.
Сделан обзор проблемы переселения водных организмов в Мировом океане с балластными водами судов. Представлены предварительные результаты базовых биологических исследований в акватории Одесского порта в рамках Международной программы (IMO/GEF/UNDP) «ГлоБалласт» по выявлению экзотических видов. Анализируется метод оценки риска инвазий с балластными водами судов в портовые акватории. Обосновываются некоторые рекомендации по его совершенствованию. Обсуждаются некоторые подходы к прогнозированию видового состава вероятных вселенцев на примере экосистемы северо-западной части Черного моря.
Tipo: Journal Contribution
Palavras-chave: Балластные воды; Инвазия; Вселенцы; Экосистема; Черное море; Оценка риска; Ballast water; Invasion; Introduced species; Ecosystem; Black Sea; Risk assessment Ecosystems Introduced species Ecosystems http://aims.fao.org/aos/agrovoc/c_2482.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/63

Tolerance to salinities shocks of the invasive mussel Limnoperma fortunei under experimental conditions
Provedor de dados: 76
Autores: Angonesi,Luciana G.; Rosa,Natália G. da; Bemvenuti,Carlos E.
The golden mussel, Limnoperna fortunei (Dunker, 1857), has been found in the estuarine regions of South America, including the Patos Lagoon (Brazil), a huge choked lagoon with an estuarine region that is highly unstable chemically. Limnoperna fortunei space-temporal variability in the lagoon's estuarine region demonstrated the need to evaluate this species' ability to survive under salinity shocks. A set of experiments was conducted under controlled laboratory conditions. Specimens were tested under salinities of 2, 4, 6, 8 and 12 ppt, and were exposed for periods of 24, 48, 72, 96 and 240 hours. The mussel can survive (90%) up to a salinity shock of 2 ppt for periods of at least 10 days. Considering the influence of climatic and stochastic events and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Limnoperna fortunei; Golden mussel; Salinity shocks; Physiological tolerance; Invasion.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000100009

Modeling trophic interactions in Lake Kivu: What roles do exotics play?
Provedor de dados: 5
Autores: Villanueva, Ching-maria; Isumbisho, M; Kaningini, B; Moreau, J; Micha, J.
An Ecopath model of the southern part of Lake Kivu, a deep African equatorial lake was constructed to quantitatively describe the possible impact of fish introductions in this ecosystem. This study is considered as an initial step in summarizing ecological and biological information, under a coherent framework, on this ecosystem. Fourteen compartments were considered. As a phytoplankton-based food web, it is observed that key food sources are not fully utilized as transfer efficiencies per trophic levels (TL) varies between 4.5 and 9.4%. Zooplankton plays a major role in transferring organic matter from TL1 to higher TLs due to the abundance of zooplanktivores. Shifts in food preferences and distribution of some of the fish functional groups were observed...
Tipo: Text
Palavras-chave: Lake Kivu; Exotic fishes; Invasion; Transfer efficiency; Food web structure.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4722.pdf

Spatial distribution in a temperate coastal ecosystem of the wild stock of the farmed oyster Crassostrea gigas (Thunberg)
Provedor de dados: 5
Autores: Cognie, B; Haure, Joel; Barille, L.
The Pacific oyster, Crassostrea gigas, well known throughout the world because of its ability to adapt to a wide range of environmental conditions, was introduced for cultivation into France on a massive scale in the 1970s. With global warming, the reproductive population, confined at the beginning to the south of the French Atlantic coast, became established at more northern latitudes (above 45 degrees 58'N), and wild C gigas began to colonize coastal areas such as our study site, Bourgneuf Bay (1 degrees-2 degrees W, 46 degrees-47 degrees N), an oyster-farming site. An original approach, based on orthophotograph analysis and in situ biomass sampling, revealed that, in the northern part of this bay, more than 70% of the total C gigas biomass was composed...
Tipo: Text
Palavras-chave: Orthophotographs; Invasion; Wild stock; Introduced species; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1878.pdf

Microsatellite markers developed through pyrosequencing allow clonal discrimination in the invasive alga Caulerpa taxifolia
Provedor de dados: 5
Autores: Arnaud-haond, Sophie; Candeias, Rui; Serrao, Ester A.; Teixeira, Sara.
Polymorphic microsatellites were developed for the invasive green algae Caulerpa taxifolia using next generation DNA sequencing. Results showed a limited rate of microsatellites for the amount of sequences, possibly explaining failure of previous attempts for microsatellite development through classical methods. Eight polymorphic loci were selected that exhibited polymorphism and a null or negligible rate of amplification failure. The number of alleles per locus ranged from two to seven. The reconstruction of Multi Locus Genotypes and the heterozygosity and departure from Hardy-Weinberg equilibrium confirmed the influence of clonal reproduction and showed the usefulness of this set of markers to successfully discriminate clonal lineages and analyze the...
Tipo: Text
Palavras-chave: Caulerpa taxifolia; Algae; Invasion; Mediterranean; Queensland; New South Wales; Seagrass.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00126/23720/21598.pdf

The occurrence, bionomics and potential impacts of the invasive freshwater snail Tarebia granifera (Lamarck, 1822) (Gastropoda: Thiaridae) in South Africa
Provedor de dados: 16
Autores: Appleton, C.C.; Forbes, A.T.; Demetriades, N.T.
The Asian prosobranch snail Tarebia granifera was reported from South Africa (and Africa) for the first time in 1999 in northern KwaZulu-Natal though it was probably introduced sometime prior to 1996. In the 10 years since its discovery it has spread rapidly, particularly northwards, into Mpumalanga province, the Kruger National Park and Swaziland. The snail has colonized different types of habitat, from rivers, lakes and irrigation canals to concrete lined reservoirs and ornamental ponds. It reaches very high densities, up to 21 000 m-2, and is likely to impact on the entire indigenous benthos of the natural waterbodies of the region – more so than any other invasive freshwater invertebrate known from the country. The indigenous thiarids Thiara amarula,...
Tipo: Article / Letter to the editor
Palavras-chave: Tarebia granifera; South Africa; Invasion; Bionomics; 42.73.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/311930

Foraging behavior interactions between the invasive Nile Tilapia (Cichliformes: Cichlidae) and three large native predators
Provedor de dados: 83
Autores: Birck,Tiago; Message,Hugo José; Baumgartner,Gilmar; Sebastien,Nyamien Yahaut; Baumgartner,Dirceu.
ABSTRACT The predator-prey relationships between juvenile Nile Tilapia Oreochromis niloticus and native fish species of the Paraná River basin, Brazil, were experimentally examined. Juveniles of O. niloticus were offered to three native predator species (Salminus brasiliensis, Pseudoplatystoma corruscans, and Brycon orbignyanus) in 2,000-L tanks with four levels of habitat complexity (0%, 50%, 100% and RD (rocks and driftwood)). Predator efficiency was more variable among species (S. brasiliensis consumed 86.6% of the prey, P. corruscans 22.5% and B. orbignyanus 18.3%) than among levels of habitat complexity, and S. brasiliensis was faster than the others in detecting and consuming the prey. The higher predatory efficiency observed for S. brasiliensis can...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasion; Management; Oreochromis niloticus; Predation; Prey.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300204

Apical membrane antigen 1 is a cross-reactive antigen between Neospora caninum and Toxoplasma gondii, and the anti-NcAMA1 antibody inhibits host cell invasion by both parasites
Provedor de dados: 19
Autores: Zhang, Houshuang; Compaore, Muller K.A.; Lee, Eung-goo; Liao, Min; Zhang, Guohong; Sugimoto, Chihiro; Fujisaki, Kozo; Nishikawa, Yoshifumi; Xuan, Xuenan.
The cross-reactive antigens of Neospora caninum and Toxoplasma gondii are important in the exploration to determine the common mechanisms of parasite-host interaction. In this study, a gene encoding N. caninum apical membrane antigen 1 (NcAMA1) was identified by immunoscreening of a N. caninum tachyzoite cDNA expression library with antisera. from mice immunized with recombinant T gondii apical membrane antigen 1 (TgAMA 1). NcAMA1 was encoded by an open reading frame of 1695 bp, which encoded a protein of 564 amino acids. The single-copy NcAMA1 gene was interrupted by seven introns. NcAMA1 showed 73.6% amino acid identity to TgAMA1. Mouse polyclonal antibodies raised against the recombinant NcAMA1 (rNcAMA1) recognized a 69-kDa native parasite protein by...
Palavras-chave: Neospora caninum; Toxoplasma gondii; Apical membrane antigen 1; Cross-reactive; Invasion.
Ano: 2007
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1034

Host Cell Specificity on The Entry of Eimeria stiedai Sporozoites in Cultured Cells
Provedor de dados: 19
Autores: Rodriguez, M. E.; Njenga, M. J.; Kawano, T.; Omata, Yoshitaka; Saito, Atsushi; Toyoda, Yutaka.
Palavras-chave: Hepatobiliar epithelial cell; Eimeria stiedai; Invasion; Rabbit.
Ano: 1998
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/280

Involvement of a Host Erythrocyte Sialic Acid Content in Babesia bovis Infection
Provedor de dados: 19
Autores: TAKABATAKE, Noriyuki; OKAMURA, Masashi; YOKOYAMA, Naoaki; OKUBO, Kazuhiro; IKEHARA, Yuzuru; IGARASHI, Ikuo; 横山, 直明; 五十嵐, 郁男.
Host sialic acid (SA) has recently been suggested to play an important role in erythrocyte (RBC) infection by Babesia spp. The present study attempted to further determine the specific type of SAs important in the RBC invasion. Bovine RBC was found to bear abundant α2-3-linked SA residues but not α2-6-linked SA in nature, confirmed by flow cytometric analysis of the neuraminidase (Nm)-treated RBCs. Lectin-blot analyses revealed the removal of α2-3-linked SAs from the 97-, 33-, and 31-kDa bands by the Nm treatment. Addition of the Nm-treated RBCs into an in vitro culture of B. bovis resulted in a decreased population of the parasitized RBCs. The thin smear samples from the cultures were then observed under a confocal laser scanning microscope after staining...
Palavras-chave: Babesia bovis; Erythrocyte; Invasion; Sialic acid.
Ano: 2007
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4166

Babesia bovis: Effects of cysteine protease inhibitors on in vitro growth
Provedor de dados: 19
Autores: Okubo, Kazuhiro; Yokoyama, Naoaki; Govind, Yadav; Alhassan, Andy; Igarashi, Ikuo.
In the present study, we examined the effects of four kinds of cysteine protease inhibitors (E64, E64d, leupeptin, and ALLN) on the in vitro asexual growth of Babesia bovis. Of these, only the lipophilic inhibitors, E64d and ALLN, were found to effectively inhibit the growth of B. bovis. In further experiments, E64d, but not ALLN, significantly suppressed the parasite’s invasion of host erythrocytes, while both chemicals, especially ALLN, inhibited the parasite’s replication within the infected erythrocytes. These data suggested the presence of cysteine protease(s) derived from B. bovis, in which the protease(s) would play important roles in the erythrocyte invasion and/or replication processes of the parasite.
Palavras-chave: Babesia bovis; Cysteine protease; Inhibitor; Invasion; Replication.
Ano: 2007
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1041

Seasonal fluctuation in the population of Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) and co-occurrence with other Coccinellids in the Federal District of Brazil
Provedor de dados: 84
Autores: Harterreiten-Souza,Érica Sevilha; Togni,Pedro Henrique Brum; Milane,Paloma Virgínia Gambarra Nitão; Cavalcante,Kelly Ramalho; Medeiros,Maria Alice de; Pires,Carmen Silvia Soares; Sujii,Edison Ryoiti.
The multicolored Asian lady beetle, Harmonia axyridis (Pallas, 1773), was first recorded in Brazil in 2002 in Paraná state and subsequently observed in Santa Catarina, Rio Grande do Sul and Minas Gerais. This species can spread to new areas and become dominant in the local community, reducing the density and diversity of native species, mainly Coccinellidae. The objective of this work was to record for the first time the occurrence of H. axyridis in the Federal District and its co-occurrence with other Coccinellidae species. The individuals were collected directly from plants at an organic farm in Taguatinga and in experimental fields of Embrapa Hortaliças, located in the Federal District, from August 2008 to January 2010. We collected 881 Coccinelids, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological Control; Diversity; Exotic species; Invasion; Predator.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492012001100001

In-Vitro Adhesion and Invasion Properties of Salmonella Typhimurium Competing with Bacteriophage in Epithelial Cells and Chicken Macrophages
Provedor de dados: 89
Autores: Lee,HY; Biswas,D; Ahn,J.
ABSTRACT This study was designed to assess the role of bacteriophage P22 in the adhesion, invasion, intracellular survival of, and cellular immune response to Salmonella Typhimurium in intestinal epithelial INT-407 and chicken macrophage-like HD11 cells. The ability of S. Typhimurium to adhere, invade, and survive to INT-407 and HD11cells was evaluated under Salmonella infection alone (control), phage treatment followed by Salmonella infection (PS), Salmonella infection followed by phage treatment (SP), and a combination treatment with Salmonella and phage (S+P). The number of S. Typhimurium associated on INT-407 cells was reduced from 4.2 to 2.7 log cfu/cm2 by phage treatment (SP). The number of intracellular S. Typhimurium within INT-407 cells was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adhesion; Bacteriophage; Invasion; Salmonella; Toll-like receptor.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400427

Variation in the distribution of Corbicula species (Mollusca: Bivalvia: Corbiculidae) after 25 years of its introduction in the Río de la Plata, Argentina
Provedor de dados: 103
Autores: Reshaid,Yamila; Cao,Luciana; Brea,Francisco; Blanche,María Ortiz; Torres,Santiago; Darrigran,Gustavo.
ABSTRACT In 1981, Corbicula fluminea (Müller, 1774) and C. largillierti (Philippi, 1844) were recorded at the Río de la Plata River. During the 1980’s, C. largillierti was found on a continuous fringe in the shore of that river, while C. fluminea was only found North of Buenos Aires’ harbor. Ten years later, C. fluminea spread to Punta Indio, while C. largillierti remained restricted to tributary streams. The density and size frequency distribution of both species were compared with previous data from samples performed in the same area in 1985-1989. The aim of this research was to determine whether the densities of both species decreased; whether C. fluminea is still more abundant than C. largillierti; and whether the size frequency distributions indicate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bivalves; Freshwater; Invasion; Invertebrates; Mussel.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100336

Effects of a native and a non-native macrophyte species of Hydrocharitaceae on Chironomidae and Oligochaeta assemblages structure doi: 10.4025/actascibiolsci.v35i3.10855
Provedor de dados: 3
Autores: Behrend, Rômulo Diego de Lima; Universidade Estadual de Maringá; Teixeira, Mariana Carolina; Universidade Estadual de Maringá; Fernandes, Sue Ellen Prata; Universidade Estadual de Maringá; Camargo, Janielly Carvalho; Universidade Estadual de Maringá; Rosin, Gisele Cristina; Universidade Estadual de Maringá; Takeda, Alice Michiyo; Universidade Estadual de Maringá.
This study investigated the structure of the Oligochaeta and Chironomidae assemblages associated with monospecific stands of two submerged macrophyte species: Egeria najas and Hydrilla verticillata. Samplings were carried out in Leopoldo Backwater and Paraná  river, in August 2008. To assess the structure of Oligochaeta and Chironomidae assemblage in each macrophyte we calculated: species density, richness, diversity, and evenness. A detrended correspondence analysis (DCA) was used to summarize Oligochaeta and Chironomidae assemblages composition. The highest values of species density and richness for the two groups were recorded in H. verticillata. Although there were no significant differences in density, richness and Shannon diversity, the assemblage...
Tipo: Distribuição espacial
Palavras-chave: Ecology upper Paraná river; Submerged macrophytes; Hydrilla verticillata; Egeria najas; Invasion; Naididae Ecology.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10855

Reprimo as a modulator of cell migration and invasion in the MDA-MB-231 breast cancer cell line
Provedor de dados: 48
Autores: Buchegger,Kurt; Ili,Carmen; Riquelme,Ismael; Letelier,Pablo; Corvalán,Alejandro H.; Brebi,Priscilla; Huang,Tim Hui-Ming; Roa,Juan Carlos.
BACKGROUND: Reprimo (RPRM), a highly glycosylated protein, is a new downstream effector of p53-induced cell cycle arrest at the G2/M checkpoint, and a putative tumor suppressor gene frequently silenced via methylation of its promoter region in several malignances. The aim of this study was to characterize the epigenetic inactivation and its biological function in BC cell lines. METHODS: The correlation between RPRM methylation and loss of mRNA expression was assessed in six breast cancer cell lines by methylation specific PCR (MSP), 5'-Aza-2'-deoxycytidine treatment and RT-PCR assays. MDA-MB-231 cells were chosen to investigate the phenotypic effect of RPRM in cell proliferation, cell cycle, cell death, cell migration and invasion. RESULTS: In the cancer...
Tipo: Journal article
Palavras-chave: Reprimo; MDA-MB-231; Migration; Invasion.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602016000100005

Role of regenerating gene IA expression on local invasion and survival in nasopharyngeal carcinoma
Provedor de dados: 48
Autores: Xing,Haijie; Chen,Xiangdong; Han,Yaofeng.
Abstract  Background Regenerating gene IA (REGIA) plays an important role in tissue regeneration and tumors prognosis of epithelium origin. However, the role of REGIA in nasopharyngeal carcinoma (NPC) is unclear. This study aims to investigate the expression and function of REG1A in NPC.  Results We have found that there was 63 patients with REGIA positive expression of 155 patients in this study (40.65%). The positive expression rate of REGIA was 30.50, 44.44 and 47.83% in stage T2, T3 and T4 patients, respectively. The REGIA expression was significantly difference in T2 and T4 stage tumors or T2 and T3&amp;#8211;T4 stage. The positive expression rate of REGIA was found to be higher in patients with cervical lymph node persistence than those with cervical...
Tipo: Journal article
Palavras-chave: Nasopharyngeal carcinoma; Regenerating gene IA; Invasion; Survival.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602017000100227

Apoptosis in HEp-2 cells infected with Ureaplasma diversum
Provedor de dados: 48
Autores: Amorim,Aline Teixeira; Marques,Lucas Miranda; Santos,Angelita Maria Oliveira Gusmão; Martins,Hellen Braga; Barbosa,Maysa Santos; Rezende,Izadora Souza; Andrade,Ewerton Ferraz; Campos,Guilherme Barreto; Lobão,Tássia Neves; Cortez,Beatriz Araujo; Monezi,Telma Alvez; Machado-Santelli,Glaucia Maria; Timenetsky,Jorge.
BACKGROUND: Bacterial pathogens have many strategies for infecting and persisting in host cells. Adhesion, invasion and intracellular life are important features in the biology of mollicutes. The intracellular location ofUreaplasma diversum may trigger disturbances in the host cell. This includes activation or inhibition of pro and anti-apoptotic factors, which facilitate the development of host damage. The aim of the present study was to associate U. diversum infection in HEp-2 cells and apoptosis induction. Cells were infected for 72hs with four U. diversum clinical isolates and an ATCC strain. The U. diversuminvasion was analyzed by Confocal Laser Scanning Microscopy and gentamicin invasion assay. The apoptosis was evaluated using pro-apoptotic and...
Tipo: Journal article
Palavras-chave: Ureaplasma diversum; Invasion; Apoptosis; HEp-2 cells.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100038

Ichthyofauna of headwater streams from the rio Ribeira de Iguape basin, at the boundaries of the Ponta Grossa Arch, Paraná, Brazil
Provedor de dados: 49
Autores: Frota,Augusto; Message,Hugo José; Oliveira,Rachel Calil de; Benedito,Evanilde; Graça,Weferson Júnio da.
Abstract: The rio Ribeira de Iguape basin (Paraná State) is highly relevant for the preservation of remnants of the Atlantic Forest. Its high levels of diversity and fish endemism explain the river dynamics promoted by the Ponta Grossa Arch, a geological structure that promotes headwater capture and isolation between the upper rio Paraná drainage, the rio Iguaçu and the rio Ribeira de Iguape. Here, our objective was to provide an unprecedented inventory for headwater streams of the rio Ribeira de Iguape basin at the boundaries of the Ponta Grossa Arch. We found 29 species of fish representing four orders and nine families. Siluriformes was the richest order followed by Characiformes. Nine species presented high abundance of sampled individuals,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Altitudinal gradient; Biogeography; Coastal drainages; Ichthyology; Invasion.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100307

Interleukin-27 augments the inhibitory effects of sorafenib on bladder cancer cells
Provedor de dados: 56
Autores: Cao,J.Y.; Yin,H.S.; Li,H.S.; Yu,X.Q.; Han,X.
Both sorafenib and interleukin-27 (IL-27) are antineoplastic drugs. This study aimed to investigate the synergistic effect of these two drugs on bladder cancer cells. HTB-9 and T24 cells were stimulated with IL-27 (50 ng/mL), sorafenib (2 μM) or the synergistic action of these two drugs. The cells without treatment acted as control. Cell proliferation, apoptosis and invasion were measured by bromodeoxyuridine assay, flow cytometry and modified Boyden chamber, respectively. Simultaneously, both modified Boyden chamber and scratch assay were used to assess cell migration. Finally, the phosphorylation levels of key kinases in the Akt/mechanistic target of rapamycin (mTOR)/mitogen-activated protein kinase (MAPK) pathway, and expression levels of matrix...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorafenib; Interleukin 27; Proliferation; Apoptosis; Invasion; Akt/mTOR/MAPK.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000800610

Relationship between matrix metalloproteinases and the occurrence and development of ovarian cancer
Provedor de dados: 56
Autores: Zhang,Y.; Chen,Q.
Ovarian cancer is one of the most malignant genital cancers, with a high mortality rate. Many researchers have suggested that matrix metalloproteinases (MMPs) have remarkably high expression in ovarian cancer tissues. MMPs are considered to be related to the occurrence, development, invasion and metastasis of ovarian cancer. Moreover, some studies have discovered that the unbalance between MMPs and tissue inhibitor of metalloproteinases (TIMPs) are associated with the malignant phenotype of tumors. This review summarizes the latest research progress of MMPs in ovarian cancer. The investigation of MMP mechanism in ovarian cancer will facilitate the development of effective anti-tumor drugs, and thereby improve the survival rate of patients with ovarian...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ovarian cancer; Matrix metalloproteinases (MMPs); Tissue inhibitor of metalloproteinases (TIMPs); Invasion; Metastasis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000600301

Propofol inhibits invasion and growth of ovarian cancer cells via regulating miR-9/NF-κB signal
Provedor de dados: 56
Autores: Huang,X.; Teng,Y.; Yang,H.; Ma,J.
Propofol is one of the most commonly used intravenous anesthetic agents during cancer resection surgery. A previous study has found that propofol can inhibit invasion and induce apoptosis of ovarian cancer cells. However, the underlying mechanisms are not known. miR-9 has been reported to be little expressed in ovarian cancer cells, which has been related to a poor prognosis in patients with ovarian cancer. Studies have also demonstrated that propofol could induce microRNAs expression and suppress NF-κB activation in some situations. In the present study, we assessed whether propofol inhibits invasion and induces apoptosis of ovarian cancer cells by miR-9/NF-κB signaling. Ovarian cancer ES-2 cells were transfected with anti-miR-9 or p65 cDNA or p65 siRNA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propofol; Ovarian cancer; MiR-9; NF-κB; Apoptosis; Invasion.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016001200605

Adipose tissue-derived stem cells promote pancreatic cancer cell proliferation and invasion
Provedor de dados: 56
Autores: Ji,S.Q.; Cao,J.; Zhang,Q.Y.; Li,Y.Y.; Yan,Y.Q.; Yu,F.X.
To explore the effects of adipose tissue-derived stem cells (ADSCs) on the proliferation and invasion of pancreatic cancer cells in vitroand the possible mechanism involved, ADSCs were cocultured with pancreatic cancer cells, and a cell counting kit (CCK-8) was used to detect the proliferation of pancreatic cancer cells. ELISA was used to determine the concentration of stromal cell-derived factor-1 (SDF-1) in the supernatants. RT-PCR was performed to detect the expression of the chemokine receptor CXCR4 in pancreatic cancer cells and ADSCs. An in vitro invasion assay was used to measure invasion of pancreatic cancer cells. SDF-1 was detected in the supernatants of ADSCs, but not in pancreatic cancer cells. Higher CXCR4 mRNA levels were detected in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adipose tissue-derived stem cells; Pancreatic cancer; Proliferation; Invasion; SDF-1.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000900758

Cantharidin suppressed breast cancer MDA-MB-231 cell growth and migration by inhibiting MAPK signaling pathway
Provedor de dados: 56
Autores: Gu,X.-D.; Xu,L.-L; Zhao,H.; Gu,J.-Z; Xie,X.-H.
As an active constituent of the beetle Mylabris used in traditional Chinese medicine, cantharidin is a potent and selective inhibitor of protein phosphatase 2A (PP2A) that plays a crucial role in cell cycle progression, apoptosis, and cell fate. The role and possible mechanisms exerted by cantharidin in cell growth and metastasis of breast cancer were investigated in this study. Cantharidin was found to inhibit cell viability and clonogenic potential in a time- and dose-dependent manner. Cell cycle analysis revealed that cell percentage in G2/M phase decreased, whereas cells in S and G1 phases progressively accumulated with the increasing doses of cantharidin treatment. In a xenograft model of breast cancer, cantharidin inhibited tumor growth in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cantharidin; Breast cancer; ERK/MAPK pathway; Growth; Migration; Invasion.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000700608

Expression of CHPF modulates cell proliferation and invasion in lung cancer
Provedor de dados: 56
Autores: Cao,Chengsong; Liu,Yong; Wang,Qun; Zhao,Jing; Shi,Ming; Zheng,Junnian.
Lung cancer is the most common malignancy worldwide and is characterized by rapid progression, aggressive behavior, frequent recurrence, and poor prognosis. The TCGA database indicates that chondroitin polymerizing factor (CHPF) is overexpressed in human lung cancer tissues compared with normal tissues and this overexpression corresponds to shorter overall survival in lung cancer patients. In this study, to investigate the function of CHPF in lung cancer, lentiviral vectors expressing CHPF shRNA were stably transduced into A549 and H1299 cells. Compared to shCtrl cells, CHPF knockdown cells had significantly reduced proliferation. Furthermore, the silencing of CHPF in A549 and H1299 cells resulted in apoptotic induction, which led to decreased colony...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CHPF; Lung cancer; Proliferation; Invasion; TCGA; Affymetrix Gene Chip.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000500610

Downregulation of survivin by siRNA inhibits invasion and promotes apoptosis in neuroblastoma SH-SY5Y cells
Provedor de dados: 56
Autores: Zhang,L.; Liang,H.; Cao,W.; Xu,R.; Ju,X.L.
Neuroblastoma is a solid tumor that occurs mainly in children. Malignant neuroblastomas have a poor prognosis because conventional chemotherapeutic agents are not very effective. Survivin, a member of the inhibitor of the apoptosis protein family, plays a significant role in cell division, inhibition of apoptosis, and promotion of cell proliferation and invasion. Previous studies found that survivin is highly expressed in some malignant neuroblastomas and is correlated with poor prognosis. The aim of this study was to investigate whether survivin could serve as a potential therapeutic target of human neuroblastoma. We employed RNA interference to reduce survivin expression in the human neuroblastoma SH-SY5Y cell line and analyzed the effect of RNA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neuroblastoma; Survivin; Apoptosis; Invasion; RNA interference.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000700548

Distribution of virulence genes sefC, pefA and spvC in Salmonella Enteritidis phage type 4 strains isolated in Brazil
Provedor de dados: 58
Autores: Castilla,Karina Salvagni; Ferreira,Claudete Serrano Astolfi; Moreno,Andrea Micke; Nunes,Iolanda Aparecida; Ferreira,Antônio José Piantino.
The distribution of virulence genes, sefC, pefA and spvC, was investigated in 110 Salmonella Enteritidis phage type 4 strains by polymerase chain reaction. Their influence in the caecal colonization and invasion of liver and spleen of one-day-old chickens was studied. Eight isolates were negative for the spvC gene, three for the pefA gene and one, for the sefC gene. These results allowed grouping the strains into four genotypes. Presence of these genes did not influence bacteria invasion in the liver and spleen of the chickens ten days after infection, although the presence of more than one fimbrial gene can be related to caecal colonization.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salmonella; Virulence genes; Colonization; Invasion.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200007

Adhesive and invasive capacities of Edwarsiella tarda isolated from South American sea lion
Provedor de dados: 58
Autores: Fernández,Araceli; Paz Villanueva,María; González,Mario; Fernández,Fabiola; Latif,Fadua; Flores,Sandra Nonier; Fernández,Heriberto.
Edwarsiella tarda is a zoonotic bacterium that can be isolated from humans, animals and the environment. Although E. tarda is primarily considered a fish pathogen, it is the only species of its genus considered to be pathogenic for humans as well. A survey of zoonotic intestinal bacteria in fresh feces from South American sea lions (SASL) Otaria flavescens, reported E. tarda as the most frequently isolated species. In this study, we used HEp-2 cells to establish in vitro the adherence and invasive ability of 17 E. tarda strains isolated from SASL fecal material. All the strains were able to adhere and invade HEp-2 cells with adhesion and invasion percentages ranging from 56 to 100% and 21 to 74%, respectively. Despite the expression of these pathogenic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Edwarsiella tarda; Adherence; Invasion; Otaria flavescens.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300044

Adhesion and invasion of Clostridium perfringens type A into epithelial cells
Provedor de dados: 58
Autores: Llanco,Luis A.; Nakano,Viviane; Moraes,Claudia T.P. de; Piazza,Roxane M.F.; Avila-Campos,Mario J.
ABSTRACT Clostridium perfringens is the causative agent for necrotic enteritis. It secretes the major virulence factors, and α- and NetB-toxins that are responsible for intestinal lesions. The TpeL toxin affects cell morphology by producing myonecrosis, but its role in the pathogenesis of necrotic enteritis is unclear. In this study, the presence of netB and tpeL genes in C. perfringens type A strains isolated from chickens with necrotic enteritis, their cytotoxic effects and role in adhesion and invasion of epithelial cells were evaluated. Six (27.3%) of the 22 C. perfringens type A strains were harboring the tpeL gene and produced morphological alterations in Vero cells after 6 h of incubation. Strains tpeL (-) induced strong cell rounding after 6 h of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adhesion; Invasion; Clostridium perfringens type A; Necrotic enteritis; TpeL gene.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000400764

Invasiveness of Cut-Leaf Ground-Cherry (Physalis angulata L.) Populations and Impact of Soil Water and Nutrient Availability
Provedor de dados: 117
Autores: Travlos,Ilias S.
Biological invasions are a major threat to natural ecosystems and agroecosystems, while weed flora is noticeably changing globally. In this study we evaluated the potential of cut-leaf ground-cherry (Physalis angulata L.), a species native to America, to invade the semi-arid regions of Greece. Greenhouse and laboratory experiments were conducted to evaluate the effects of different environmental resources (nutrient and water availability) on seedling growth, biomass production, fecundity, and seed germination of four populations of cut-leaf ground-cherry. Our results suggest that cut-leaf ground-cherry does not tolerate extreme drought during the first growth stages, while it can survive and produce adequate and rapidly germinated seed (&gt; 85%) under low...
Tipo: Journal article
Palavras-chave: Physalis angulata; Invasion; Greece; Water stress.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300009