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1.
BMC Plant Biol ; 24(1): 516, 2024 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-38851686

RESUMO

BACKGROUND: The influence of native secondary succession associated with anthropogenic disturbance on the biodiversity of the forests in subtropical China remains uncertain. In particular, the evolutionary response of small understory shrubs, particularly pioneer species inhabiting continuously disturbed habitats, to topographic heterogeneity and climate change is poorly understood. This study aimed to address this knowledge gap by focusing on the Gaultheria crenulata group, a clade of small pioneer shrubs in subtropical China. RESULTS: We examined the genetic structure and demographic history of all five species of the G. crenulata group with two maternally inherited chloroplast DNA (cpDNA) fragments and two biparentally inherited low-copy nuclear genes (LCG) over 89 natural populations. We found that the genetic differentiation of this group was influenced by the geomorphological boundary between different regions of China in association with Quaternary climatic events. Despite low overall genetic diversity, we observed an isolation-by-distance (IBD) pattern at a regional scale, rather than isolation-by-environment (IBE), which was attributed to ongoing human disturbance in the region. CONCLUSION: Our findings suggest that the genetic structure of the G. crenulata group reflects the interplay of geological topography, historical climates, and anthropogenic disturbance during the Pliocene-Pleistocene-Holocene periods in subtropical China. The observed IBD pattern, particularly prominent in western China, highlights the role of limited dispersal and gene flow, possibly influenced by physical barriers or decreased connectivity over geographic distance. Furthermore, the east-to-west trend of gene flow, potentially facilitated by the East Asian monsoon system, underscores the complex interplay of biotic and abiotic factors shaping the genetic dynamics of pioneer species in subtropical China's secondary forests. These findings can be used to assess the impact of environmental changes on the adaptation and persistence of biodiversity in subtropical forest ecosystems.


Assuntos
Florestas , Variação Genética , China , DNA de Cloroplastos/genética , Dinâmica Populacional , Biodiversidade , Fluxo Gênico
2.
Mol Phylogenet Evol ; 197: 108082, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38705251

RESUMO

In addition to topography and climate, biogeographic dispersal has been considered to influence plant diversity in the Himalaya-Hengduan Mountains (HHM), yet, the mode and tempo of sky island dispersal and its influence on species richness has been little explored. Through phylogenetic analysis of Gaultheria ser. Trichophyllae, a sky island alpine clade within the HHM, we test the hypothesis that dispersal has affected current local species richness. We inferred the dynamics of biogeographic dispersal with correlation tests on direction, distance, occurrence time, and regional species richness. We found that G. ser. Trichophyllae originated at the end of the Miocene and mostly dispersed toward higher longitudes (eastward). In particular, shorter intra-regional eastward dispersals and longer inter-regional westward dispersals were most frequently observed. We detected a prevalence of eastward intra-region dispersals in both glacial periods and interglacials. These dispersals may have been facilitated by the reorganization of paleo-drainages and monsoon intensification through time. We suggest that the timing of dispersal corresponding to glacial periods and the prevalence of intra-region dispersal, rather than dispersal frequency, most influenced the pattern of species richness of G. ser. Trichophyllae. This study facilitates a more comprehensive understanding of biodiversity in the sky islands within the HHM.


Assuntos
Biodiversidade , Filogenia , China , Filogeografia , Ilhas , Dispersão Vegetal
3.
Cardiol Young ; 34(2): 250-261, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38174736

RESUMO

BACKGROUND: Childhood cancer survivors are at increased risk of developing cardiovascular diseases, presenting as the main causes of morbidity and mortality within this group. Besides the usual primary and secondary prevention in combination with screening during follow-up, the modifiable lifestyle factors of physical activity, nutrition, and body weight have not yet gained enough attention regarding potential cardiovascular risk reduction. OBJECTIVE: These practical recommendations aim to provide summarised information and practical implications to paediatricians and health professionals treating childhood cancer survivors to reduce the risk of cardiovascular late effects. METHODS: The content derives from either published guidelines or expert opinions from Association of European Paediatric and Congenital Cardiology working groups and is in accordance with current state-of-the-art. RESULTS: All usual methods of prevention and screening regarding the risk, monitoring, and treatment of occurring cardiovascular diseases are summarised. Additionally, modifiable lifestyle factors are explained, and clear practical implications are named. CONCLUSION: Modifiable lifestyle factors should definitely be considered as a cost-effective and complementary approach to already implemented follow-up care programs in cardio-oncology, which can be actively addressed by the survivors themselves. However, treating physicians are strongly encouraged to support survivors to develop and maintain a healthy lifestyle, including physical activity as one of the major influencing factors. This article summarises relevant background information and provides specific practical recommendations on how to advise survivors to increase their level of physical activity.


Assuntos
Sobreviventes de Câncer , Cardiologia , Doenças Cardiovasculares , Cardiopatias Congênitas , Insuficiência Cardíaca , Neoplasias , Criança , Humanos , Adulto , Cardiopatias Congênitas/complicações , Doenças Cardiovasculares/prevenção & controle , Neoplasias/complicações , Exercício Físico , Estilo de Vida
4.
Mol Phylogenet Evol ; 182: 107702, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36781032

RESUMO

The angiosperm family Primulaceae is morphologically diverse and distributed nearly worldwide. However, phylogenetic uncertainty has obstructed the identification of major morphological and biogeographic transitions within the clade. We used target capture sequencing with the Angiosperms353 probes, taxon-sampling encompassing nearly all genera of the family, tree-based sequence curation, and multiple phylogenetic approaches to investigate the major clades of Primulaceae and their relationship to other Ericales. We generated dated phylogenetic trees and conducted broad-scale biogeographic analyses as well as stochastic character mapping of growth habit. We show that Ardisia, a pantropical genus and the largest in the family, is not monophyletic, with at least 19 smaller genera nested within it. Neotropical members of Ardisia and several smaller genera form a clade, an ancestor of which arrived in the Neotropics and began diversifying about 20 Ma. This Neotropical clade is most closely related to Elingamita and Tapeinosperma, which are most diverse on islands of the Pacific. Both Androsace and Primula are non-monophyletic by the inclusion of smaller genera. Ancestral state reconstructions revealed that there have either been parallel transitions to an herbaceous habit in Primuloideae, Samolus, and at least three lineages of Myrsinoideae, or a common ancestor of nearly all Primulaceae was herbaceous. Our results provide a robust estimate of phylogenetic relationships across Primulaceae and show that a revised classification of Myrsinoideae and several other clades within the family is necessary to render all genera monophyletic.


Assuntos
Primulaceae , Filogenia , Primulaceae/genética , Sequência de Bases , Análise de Sequência de DNA , DNA de Plantas/genética
5.
Br J Sports Med ; 57(6): 371-380, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36332982

RESUMO

OBJECTIVE: (1) Identify and review current policies for the cardiovascular screening of athletes to assess their applicability to the paediatric population and (2) evaluate the quality of these policy documents using the Appraisal of Guidelines for Research & Evaluation II (AGREE II) tool. DESIGN: Systematic review and quality appraisal of policy documents. DATA SOURCES: A systematic search of PubMed, MEDLINE, Scopus, Web of Science, SportDiscus and CINAHL. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: An article was included if it was a policy/position statement/guideline/consensus or recommendation paper relating to athletes and cardiovascular preparticipation screening. RESULTS AND SUMMARY: Of the 1630 articles screened, 13 met the inclusion criteria. Relevance to paediatric athletes was found to be high in 3 (23%), moderate in 6 (46%) and low in 4 (31%), and only 2 provide tailored guidance for the athlete aged 12-18 years. A median 5 related citations per policy investigated solely paediatric athletes, with study designs most commonly being retrospective (72%). AGREEII overall quality scores ranged from 25% to 92%, with a median of 75%. The lowest scoring domains were rigour of development; (median 32%) stakeholder involvement (median 47%) and Applicability (median 52%). CONCLUSION: Cardiac screening policies for athletes predominantly focus on adults, with few providing specific recommendations for paediatric athletes. The overall quality of the policies was moderate, with more recent documents scoring higher. Future research is needed in paediatric athletes to inform and develop cardiac screening guidelines, to improve the cardiac care of youth athletes.


Assuntos
Atletas , Cardiopatias , Adulto , Adolescente , Humanos , Criança , Estudos Retrospectivos , Política Pública , PubMed
6.
Am J Bot ; 109(10): 1596-1606, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36109839

RESUMO

PREMISE: The true blueberries (Vaccinium sect. Cyanococcus; Ericaceae), endemic to North America, have been intensively studied for over a century. However, with species estimates ranging from nine to 24 and much confusion regarding species boundaries, this ecologically and economically valuable group remains inadequately understood at a basic evolutionary and taxonomic level. As a first step toward understanding the evolutionary history and taxonomy of this species complex, we present the first phylogenomic hypothesis of the known diploid blueberries. METHODS: We used flow cytometry to verify the ploidy of putative diploid taxa and a target-enrichment approach to obtain a genomic data set for phylogenetic analyses. RESULTS: Despite evidence of gene flow, we found that a primary phylogenetic signal is present. Monophyly for all morphospecies was recovered, with two notable exceptions: one sample of V. boreale was consistently nested in the V. myrtilloides clade and V. caesariense was nested in the V. fuscatum clade. One diploid taxon, Vaccinium pallidum, is implicated as having a homoploid hybrid origin. CONCLUSIONS: This foundational study represents the first attempt to elucidate evolutionary relationships of the true blueberries of North America with a phylogenomic approach and sets the stage for multiple avenues of future study such as a taxonomic revision of the group, the verification of a homoploid hybrid taxon, and the study of polyploid lineages within the context of a diploid phylogeny.


Assuntos
Mirtilos Azuis (Planta) , Vaccinium , Filogenia , Diploide , Poliploidia
7.
BMC Biol ; 19(1): 232, 2021 10 29.
Artigo em Inglês | MEDLINE | ID: mdl-34711223

RESUMO

BACKGROUND: Flowering plants (angiosperms) are dominant components of global terrestrial ecosystems, but phylogenetic relationships at the familial level and above remain only partially resolved, greatly impeding our full understanding of their evolution and early diversification. The plastome, typically mapped as a circular genome, has been the most important molecular data source for plant phylogeny reconstruction for decades. RESULTS: Here, we assembled by far the largest plastid dataset of angiosperms, composed of 80 genes from 4792 plastomes of 4660 species in 2024 genera representing all currently recognized families. Our phylogenetic tree (PPA II) is essentially congruent with those of previous plastid phylogenomic analyses but generally provides greater clade support. In the PPA II tree, 75% of nodes at or above the ordinal level and 78% at or above the familial level were resolved with high bootstrap support (BP ≥ 90). We obtained strong support for many interordinal and interfamilial relationships that were poorly resolved previously within the core eudicots, such as Dilleniales, Saxifragales, and Vitales being resolved as successive sisters to the remaining rosids, and Santalales, Berberidopsidales, and Caryophyllales as successive sisters to the asterids. However, the placement of magnoliids, although resolved as sister to all other Mesangiospermae, is not well supported and disagrees with topologies inferred from nuclear data. Relationships among the five major clades of Mesangiospermae remain intractable despite increased sampling, probably due to an ancient rapid radiation. CONCLUSIONS: We provide the most comprehensive dataset of plastomes to date and a well-resolved phylogenetic tree, which together provide a strong foundation for future evolutionary studies of flowering plants.


Assuntos
Magnoliopsida , Núcleo Celular , Ecossistema , Humanos , Magnoliopsida/genética , Filogenia , Plastídeos
8.
New Phytol ; 232(3): 1424-1435, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-33932292

RESUMO

Identifying the contours and correlates of species turnover is central to understanding the nature of biogeographical regions. The Hengduan Mountains region of south-central China (HMR) is well known for its high diversity of plants, but its boundaries and internal floristic structure are poorly understood, especially in relation to geographical and environmental factors. With data on occurrences and elevational ranges of seed plants across the HMR and adjacent areas of the greater Qinghai-Tibet Plateau, we identified motifs (distinct species assemblages) by Grade of Membership models, and characterized relative contributions of geography, elevation, and climate to their spatial patterns. Motifs segregate primarily by latitude, elevation, and correlated environmental variables, most sharply across the tropical-temperate divide. Secondarily, they segregate by longitude and geographical features, and reveal a novel divide across the Jinsha River. A core set of motifs corresponds to previous delineations of the HMR. The HMR biodiversity hotspot is more a mosaic of floristic elements than a cohesive entity. Grade of Membership models effectively reveal the geographical contours of biotic structure, and are a valuable new tool for biogeographical analysis.


Assuntos
Biodiversidade , Plantas , Clima , Geografia , Sementes
9.
Eur Heart J ; 41(43): 4191-4199, 2020 11 14.
Artigo em Inglês | MEDLINE | ID: mdl-32845299

RESUMO

Improved clinical care has led to an increase in the number of adults with congenital heart disease (CHD) engaging in leisure time and competitive sports activities. Although the benefits of exercise in patients with CHD are well established, there is a low but appreciable risk of exercise-related complications. Published exercise recommendations for individuals with CHD are predominantly centred on anatomic lesions, hampering an individualized approach to exercise advice in this heterogeneous population. This document presents an update of the recommendations for competitive sports participation in athletes with cardiovascular disease published by the Sports Cardiology & Exercise section of the European Association of Preventive Cardiology (EAPC) in 2005. It introduces an approach which is based on the assessment of haemodynamic, electrophysiological and functional parameters, rather than anatomic lesions. The recommendations provide a comprehensive assessment algorithm which allows for patient-specific assessment and risk stratification of athletes with CHD who wish to participate in competitive sports.


Assuntos
Cardiologia , Cardiopatias Congênitas , Esportes , Adolescente , Adulto , Atletas , Criança , Exercício Físico , Humanos
10.
J Dtsch Dermatol Ges ; 18(11): 1270-1277, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-33197129

RESUMO

BACKGROUND AND OBJECTIVES: We examined retrospectively whether the combination of standard dacarbazine (DTIC) and/or fotemustine chemotherapy and autologous peptide-loaded dendritic cell (DC) vaccination may improve survival of stage IV melanoma patients. Furthermore, a small cohort of long-term survivors was studied in more detail. PATIENTS AND METHODS: Between 1998 and 2008, 41 patients were vaccinated at least three times with DCs while receiving chemotherapy and compared to all other 168 patients in our database who only received chemotherapy (1993-2008). RESULTS: Median life expectancy of patients receiving additional DC-vaccination was 18 months, compared to eleven months for patients under standard chemotherapy alone. In contrast to patients with other haplotypes, the HLA-A1/A1 subset of DC-treated patients showed significantly lower median survival (12 vs. 25 months). Autoantibodies were frequently detected in serum of both vaccinated and non-vaccinated patients, and there was no correlation between titers, loss or appearance of autoantibodies and survival. Additionally, phenotyping of DCs and PBMCs also did not reveal any conspicuous correlation with survival. CONCLUSIONS: Combining standard chemotherapy and DC vaccination appears superior to chemotherapy alone. The impact of HLA haplotypes on survival emphasizes the importance of a careful selection of patients with specific, well-defined HLA haplotypes for future vaccination trials using peptide-pulsed DCs, possibly combined with checkpoint inhibitors.


Assuntos
Células Dendríticas , Melanoma , Feminino , Humanos , Masculino , Peptídeos , Estudos Retrospectivos
11.
Mol Phylogenet Evol ; 121: 198-211, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29360618

RESUMO

Relationships among the genera of the small, woody family Styracaceae and among families of the large, diverse order Ericales have resisted complete resolution with sequences from one or a few genes. We used plastome sequencing to attempt to resolve the backbone relationships of Styracaceae and Ericales and to explore plastome structural evolution. Complete plastomes for 23 species are newly reported here, including 18 taxa of Styracaceae and five of Ericales (including species of Sapotaceae, Clethraceae, Symplocaceae, and Diapensiaceae). Combined with publicly available complete plastome data, this resulted in a data set of 60 plastomes, including 11 of the 12 genera of Styracaceae and 12 of 22 families of Ericales. Styracaceae plastomes were found to possess the quadripartite structure typical of angiosperms, with sizes ranging from 155 to 159 kb. Most of the plastomes were found to possess the full complement of typical angiosperm plastome genes. Unusual structural features were detected in plastomes of Alniphyllum and Bruinsmia, including the presence of a large 20-kb inversion (14 genes) in the Large Single-Copy region, the loss or pseudogenization of the clpP and accD genes in Bruinsmia, and the loss of the first exon of rps16 in B. styracoides. Likewise, the second intron from clpP was found to be lost in Alniphyllum and Huodendron. Phylogenomic analyses including all 79 plastid protein-coding genes provided improved resolution for relationships among the genera of Styracaceae and families of Ericales. Styracaceae was strongly supported as monophyletic, with Styrax, Huodendron, and a clade of Alniphyllum + Bruinsmia successively sister to the remainder of the family, all with strong support. All genera of Styracaceae were recovered as monophyletic, except for Halesia and Pterostyrax, which were each recovered as polyphyletic with strong support. Within Ericales, all families were recovered as monophyletic with strong support, with Balsaminaceae sister to remaining Ericales. Most relationships recovered in plastome analyses are congruent with previous analyses based on smaller data sets. Our results demonstrate the power of plastid phylogenomics to improve phylogenetic hypotheses among genera and families, and provide new insight into plastome evolution across Ericales.


Assuntos
Ericales/classificação , Genômica , Filogenia , Plastídeos/genética , Styracaceae/classificação , Styracaceae/genética , Sequência de Bases , Evolução Molecular , Genomas de Plastídeos , Íntrons/genética , Funções Verossimilhança , Polimorfismo de Nucleotídeo Único/genética , Sequências Repetitivas de Ácido Nucleico/genética
12.
Am J Bot ; 105(9): 1577-1594, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30207598

RESUMO

PREMISE OF THE STUDY: The North American Cercis clade spans dry to mesic climates and exhibits complex morphological variation. We tested various proposed species classifications of this group and whether aspects of leaf morphology, particularly the "drip-tip" in some regional populations, are adaptive and/or linked with phylogeny. METHODS: We made measurements on over 1100 herbarium specimens from throughout North America and analyzed the data with univariate and multivariate approaches. We analyzed phylogenetically DNA sequence data from nuclear ITS and three plastid regions from 40 samples, and estimated divergence times with a relaxed-clock Bayesian analysis. We used climate and geographic position data to predict the variation observed in leaf size and shape by using stepwise multiple linear regressions. KEY RESULTS: Morphometric analyses yielded a pattern of continuous and often clinal character variation across North America, without correlated gaps in character states. Conversely, phylogenetic and divergence time analyses yielded distinct clades from California, the interior west, and eastern North America separated by between ~12 and 16 million years. Multiple regressions yielded highly significant correlations between leaf apex shape and precipitation of the warmest quarter. CONCLUSIONS: Despite a pattern of continuous morphological character variation, the long period of geographic and presumably genetic isolation warrants the delimitation of three species. Predictive modeling supports the adaptive value of acuminate apices or "drip-tips" in mesic habitats. This suggests that Cercis leaves change more rapidly than inferred from parsimony reconstruction, which has implications for the evolution of the dry floras of North America and Eurasia.


Assuntos
Fabaceae/anatomia & histologia , Folhas de Planta/anatomia & histologia , Evolução Biológica , DNA de Plantas/genética , Demografia , Ecossistema , Fabaceae/genética , América do Norte , Filogenia
13.
Int J Mol Sci ; 19(5)2018 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-29693617

RESUMO

The subfamily Caesalpinioideae of the Fabaceae has long been recognized as non-monophyletic due to its controversial phylogenetic relationships. Cercis chuniana, endemic to China, is a representative species of Cercis L. placed within Caesalpinioideae in the older sense. Here, we report the whole chloroplast (cp) genome of C. chuniana and compare it to six other species from the Caesalpinioideae. Comparative analyses of gene synteny and simple sequence repeats (SSRs), as well as estimation of nucleotide diversity, the relative ratios of synonymous and nonsynonymous substitutions (dn/ds), and Kimura 2-parameter (K2P) interspecific genetic distances, were all conducted. The whole cp genome of C. chuniana was found to be 158,433 bp long with a total of 114 genes, 81 of which code for proteins. Nucleotide substitutions and length variation are present, particularly at the boundaries among large single copy (LSC), inverted repeat (IR) and small single copy (SSC) regions. Nucleotide diversity among all species was estimated to be 0.03, the average dn/ds ratio 0.3177, and the average K2P value 0.0372. Ninety-one SSRs were identified in C. chuniana, with the highest proportion in the LSC region. Ninety-seven species from the old Caesalpinioideae were selected for phylogenetic reconstruction, the analysis of which strongly supports the monophyly of Cercidoideae based on the new classification of the Fabaceae. Our study provides genomic information for further phylogenetic reconstruction and biogeographic inference of Cercis and other legume species.


Assuntos
Fabaceae/genética , Genoma de Cloroplastos , Filogenia , Evolução Molecular , Fabaceae/classificação , Repetições de Microssatélites , Fases de Leitura Aberta , Polimorfismo Genético
14.
Mol Phylogenet Evol ; 110: 7-18, 2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-28215572

RESUMO

Gaultheria series Trichophyllae Airy Shaw is an angiosperm clade of high-alpine shrublets endemic to the Himalaya-Hengduan Mountains and characterized by recent species divergence and convergent character evolution that has until recently caused much confusion in species circumscription. Although multiple DNA sequence regions have been employed previously, phylogenetic relationships among species in the group have remained largely unresolved. Here we examined the effectiveness of the plastid genome for improving phylogenetic resolution within the G. series Trichophyllae clade. Plastid genomes of 31 samples representing all 19 recognized species of the series and three outgroup species were sequenced with Illumina Sequencing technology. Maximum likelihood (ML), maximum parsimony (MP) and Bayesian inference (BI) phylogenetic analyses were performed with various datasets, i.e., that from the whole plastid genome, coding regions, noncoding regions, large single-copy region (LSC) and inverted-repeat region a (IRa). The partitioned whole plastid genome with inverted-repeat region b (IRb) excluded was also analyzed with ML and BI. Tree topologies based on the whole plastid genome, noncoding regions, and LSC region datasets across all analyses, and that based on the partitioned dataset with ML and BI analyses, are identical and generally strongly supported. Gaultheria series Trichophyllae form a clade with three species and one variety that is sister to a clade of the remaining 16 species; the latter comprises seven main subclades. Interspecific relationships within the series are strongly supported except for those based on the coding-region and IRa-region datasets. Eight divergence hotspot regions, each possessing >5% percent variable sites, were screened across the whole plastid genome of the 28 individuals sampled in the series. Results of morphological character evolution reconstruction diagnose several clades, and a hypothesis of adaptive evolution for plant habit is postulated.


Assuntos
Ecossistema , Evolução Molecular , Gaultheria/genética , Genomas de Plastídeos , Ilhas , Filogenia , Plastídeos/genética , Sequência de Bases , Teorema de Bayes , Flores/anatomia & histologia , Frutas/anatomia & histologia , Gaultheria/anatomia & histologia , Funções Verossimilhança , Folhas de Planta/anatomia & histologia , Análise de Sequência de DNA
15.
Cardiol Young ; 27(9): 1655-1660, 2017 11.
Artigo em Inglês | MEDLINE | ID: mdl-28789718

RESUMO

Sudden death in young competitive athletes can be avoided by implementation of pre-participation screening programmes. A screening programme should be performed only by trained physicians and should include the athlete's personal and family history, physical examination results, and the readings from a 12-lead-electrocardiogram. The athlete should undergo this screening programme every second year to detect progressive diseases. In addition, the programme should include detailed instructions to the athletes to pause training during infections in order to prevent sudden death due to myocarditis.


Assuntos
Atletas , Doenças Cardiovasculares/diagnóstico , Doenças Cardiovasculares/epidemiologia , Morte Súbita Cardíaca/prevenção & controle , Adolescente , Adulto , Cardiologia , Doenças Cardiovasculares/complicações , Criança , Eletrocardiografia/métodos , Europa (Continente)/epidemiologia , Feminino , Humanos , Masculino , Programas de Rastreamento , Anamnese , Miocardite , Pediatria , Exame Físico , Instituições Acadêmicas , Sociedades Médicas , Esportes , Adulto Jovem
16.
Ann Bot ; 116(5): 727-37, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26187222

RESUMO

BACKGROUND AND AIMS: The phylogeography of plant species in sub-tropical China remains largely unclear. This study used Tapiscia sinensis, an endemic and endangered tree species widely but disjunctly distributed in sub-tropical China, as a model to reveal the patterns of genetic diversity and phylogeographical history of Tertiary relict plant species in this region. The implications of the results are discussed in relation to its conservation management. METHODS: Samples were taken from 24 populations covering the natural geographical distribution of T. sinensis. Genetic structure was investigated by analysis of molecular variance (AMOVA) and spatial analysis of molecular variance (SAMOVA). Phylogenetic relationships among haplotypes were constructed with maximum parsimony and haplotype network methods. Historical population expansion events were tested with pairwise mismatch distribution analysis and neutrality tests. Species potential range was deduced by ecological niche modelling (ENM). KEY RESULTS: A low level of genetic diversity was detected at the population level. A high level of genetic differentiation and a significant phylogeographical structure were revealed. The mean divergence time of the haplotypes was approx. 1·33 million years ago. Recent range expansion in this species is suggested by a star-like haplotype network and by the results from the mismatch distribution analysis and neutrality tests. CONCLUSIONS: Climatic oscillations during the Pleistocene have had pronounced effects on the extant distribution of Tapiscia relative to the Last Glacial Maximum (LGM). Spatial patterns of molecular variation and ENM suggest that T. sinensis may have retreated in south-western and central China and colonized eastern China prior to the LGM. Multiple montane refugia for T. sinense existing during the LGM are inferred in central and western China. The populations adjacent to or within these refugia of T. sinense should be given high priority in the development of conservation policies and management strategies for this endangered species.


Assuntos
Conservação dos Recursos Naturais , Variação Genética , Magnoliopsida/classificação , Magnoliopsida/fisiologia , China , DNA de Cloroplastos/genética , DNA de Cloroplastos/metabolismo , DNA Espaçador Ribossômico/genética , DNA Espaçador Ribossômico/metabolismo , Haplótipos , Magnoliopsida/genética , Dados de Sequência Molecular , Filogenia , Filogeografia , Dispersão Vegetal , Análise de Sequência de DNA
17.
Proc Natl Acad Sci U S A ; 109(4): 1154-8, 2012 Jan 24.
Artigo em Inglês | MEDLINE | ID: mdl-22232687

RESUMO

The recently described genus Philcoxia comprises three species restricted to well lit and low-nutrient soils in the Brazilian Cerrado. The morphological and habitat similarities of Philcoxia to those of some carnivorous plants, along with recent observations of nematodes over its subterranean leaves, prompted the suggestion that the genus is carnivorous. Here we report compelling evidence of carnivory in Philcoxia of the Plantaginaceae, a family in which no carnivorous members are otherwise known. We also document both a unique capturing strategy for carnivorous plants and a case of a plant that traps and digests nematodes with underground adhesive leaves. Our findings illustrate how much can still be discovered about the origin, distribution, and frequency of the carnivorous syndrome in angiosperms and, more generally, about the diversity of nutrient-acquisition mechanisms that have evolved in plants growing in severely nutrient-impoverished environments such as the Brazilian Cerrado, one of the world's 34 biodiversity hotspots.


Assuntos
Nematoides , Folhas de Planta/fisiologia , Plantago/anatomia & histologia , Plantago/fisiologia , Adesividade , Animais , Brasil , Microscopia de Fluorescência , Isótopos de Nitrogênio/metabolismo , Folhas de Planta/ultraestrutura , Plantago/metabolismo
20.
Hell J Nucl Med ; 18 Suppl 1: 148, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26665231

RESUMO

OBJECTIVE: The burden of cardiac disease in childhood is unknown. It will be a sum of 1% of living births in the general population, suffering from Congenital Heart Disease (CHD) + approximately 2.5% of the general population suffering from bicuspid aortic valve diseases + an unknown higher prevalence of acquired diseases. Cardiomyopathies, arrhythmias - sudden cardiac death (SCD), rheumatic heard disease, hypertension and accelerating atherosclerosis are among the most frequent. Adding on, genetic syndromes including cardiac defects, endocarditis and myocarditis we can address a large pediatric population worldwide, suffering from heart disease. Diagnosis and treatment of these diseases are not afforded in many countries worldwide due to luck of human and material resources. The aim of this paper is to describe how some of the above mentioned diseases can be either early detected or prevented. The working Group "Cardiovascular Prevention" of the Association of European Pediatric and Congenital Cardiology (AEPC) focused on some forms of them since its formation in 2011. These areas are: 1) some forms of critical CHD, 2) sudden cardiac death linked to sport activities and 3) detecting- preventing cardio vascular diseases CVD in the young. Methods-Populations: Measurements of pre and post ductal saturation of oxygen using pulse oximeters, after the first day from birth, can early and cheaply detect critical Ductal Arteriosus dependent pulmonary or systemic and cyanotic CHD, saving lives and decreasing significantly the cost of medical care. This screening test can be applied to all neonates as late as possible after their birth and before released to their homes. A combination of detailed medical history, physical examination and 12 lead ECG, during a pre-participation in sport activities medical screening test can prevent SCD, related to a variety of nosology. This combined screening test can be applied to all children before they are exposed to school or leisure sport activities. Screening to early detect and treating existent risk factors (RF) for CVD as well as preventing obesity and hypertension, contributes in lowering the burden of CVD. Specific screening tests as laboratory measurements of lipids, fasting glucose or regular measurements of Blood Pressure and waist to hip ratio in children with a family history of CVD or other co-morbidity that provokes accelerating atherosclerosis must be done on a regular basis. RESULTS: Since 2010, four European studies reporting the test accuracy of routine pulse oximetry screening, in over 150.000 babies, have delivered new data. A systematic review and meta-analysis of 230.000 screened babies, reported high specificity, moderate sensitivity and a low false-positive rate. Routine screening for critical CHD using pulse oximetry is being increasingly supported and was added to the recommended uniform screening panel in the USA in 2011. Evaluating children with CHD before their involvement in sport activities, so a clear view in what they can and what they can't to is vital for their safety. For children involved in competitive or leisure sport activities, an initial evaluation and a yearly F/U is vital. In cases of near SCD events an additional thorough investigation and appropriate management is required. Investigating the severity of the existing RF and cooperating with Pediatricians in their treatment (e.g. heredity forms of hyperlipidemias, existing hypertension) of them is essential. Furthermore preventing acceleration of atherosclerosis in patients with: Diabetes Mellitus I, II, chronic renal disease, post Kawasaki disease, post heart transplantation patients, Cardio-Metabolic Syndrome patients, by eradicating RF primordially or by alternating them by opposing a healthy life style or by medicine treatment, has sown in many studies to post pone clinical events in adulthood. DISCUSSION: As many studies have proved the role of preventive measures that can alternate the outcome of cardiac diseases in childhood. AEPC/Preventive Cardiology working group is in the process to publish in the near future guidelines on this topic.

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