Molecular Clock
Mostrando 1-12 de 174 artigos, teses e dissertações.
-
1. Novel molecular evidence of population structure in Anopheles (Kerteszia) bellator from Brazilian Atlantic Forest
Anopheles bellator is a primary malaria vector in the Atlantic Forest. Partial sequences of timeless and Clock genes were used to assess the genetic differentiation of five Brazilian populations, which showed strong population structure (e.g. high F ST values and fixed differences) in all pairwise comparisons between Bahia sample and the others from Paraná
Mem. Inst. Oswaldo Cruz. Publicado em: 13/05/2019
-
2. First isolation of West Nile virus in Brazil
BACKGROUND Serological evidence of West Nile virus (WNV) infection has been reported in different regions of Brazil from equine and human hosts but the virus had never been isolated in the country. OBJECTIVES We sought to identify the viral etiology of equine encephalitis in Espírito Santo state. METHODS We performed viral culture in C6/36 cells, molec
Mem. Inst. Oswaldo Cruz. Publicado em: 17/01/2019
-
3. Circadian clock of Aedes aegypti: effects of blood-feeding, insemination and RNA interference
Mosquitoes are the culprits of some of the most important vector borne diseases. A species’ potential as a vector is directly dependent on their pattern of behaviour, which is known to change according to the female’s physiological status such as whether the female is virgin/mated and unfed/blood-fed. However, the molecular mechanism triggered by and/or
Mem. Inst. Oswaldo Cruz. Publicado em: 2013
-
4. When population and evolutionary genetics met behaviour
In this review, we analyse the impact of a population and evolutionary genetics approach on the study of insect behaviour. Our attention is focused on the model organism Drosophila melanogaster and several other insect species. In particular, we explore the relationship between rhythmic behaviours and the molecular evolution of clock and ion channel genes.
Mem. Inst. Oswaldo Cruz. Publicado em: 2013
-
5. Circadian rhythms in insect disease vectors
Organisms from bacteria to humans have evolved under predictable daily environmental cycles owing to the Earth’s rotation. This strong selection pressure has generated endogenous circadian clocks that regulate many aspects of behaviour, physiology and metabolism, anticipating and synchronising internal time-keeping to changes in the cyclical environment. I
Mem. Inst. Oswaldo Cruz. Publicado em: 2013
-
6. Filogeografia citogenética e molecular em populações de traíras Hoplias malabaricus (Bloch, 1794), do leste do Brasil / Molecular and karyotypic phylogeography in populations of the traíras Hoplias malabaricus (Bloch, 1794), in Eastern Brazil
A fauna de peixes dulcícolas neotropicais é considerada a mais rica do mundo. Toda essa diversidade é resultante da complexa história paleohidrológica dos rios sul e centro-americanos, a qual promoveu vicariancia e dispersão da biota aquática ao longo de milhões de anos. A traíra Hoplias malabaricus é um caracídeo com ampla distribuição neotropi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2010
-
7. Do Caucasian and Asian clocks tick differently?
The Period 3 and Clock genes are important components of the mammalian molecular circadian system. Studies have shown association between polymorphisms in these clock genes and circadian phenotypes in different populations. Nevertheless, differences in the pattern of allele frequency and genotyping distribution are systematically observed in studies with dif
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-01
-
8. Genetic diversity of the Cryptococcus species complex suggests that Cryptococcus gattii deserves to have varieties
The Cryptococcus species complex contains two sibling taxa, Cryptococcus neoformans and Cryptococcus gattii. Both species are basidiomycetous yeasts and major pathogens of humans and other mammals. Genotyping methods have identified major haploid molecular types of C. neoformans (VNI, VNII, VNB and VNIV) and of C. gattii (VGI, VGII, VGIII and VGIV). To inves
Publicado em: 2010
-
9. Moléculas que marcam o tempo: implicações para os fenótipos circadianos
OBJETIVO: Revisar resumidamente a literatura dos últimos 36 anos de pesquisa em cronobiologia molecular a fim de informar aos profissionais de saúde os avanços obtidos nesta área e os potenciais para aplicação na clínica médica. MÉTODO: Buscas na literatura foram realizadas utilizando as bases de dados PubMed e Scopus usando como palavras-chave "clo
Revista Brasileira de Psiquiatria. Publicado em: 2009-03
-
10. The historical biogeography of Pteroglossus aracaris (Aves, Piciformes, Ramphastidae) based on Bayesian analysis of mitochondrial DNA sequences
Most Neotropical birds, including Pteroglossus aracaris, do not have an adequate fossil record to be used as time constraints in molecular dating. Hence, the evolutionary timeframe of the avian biota can only be inferred using alternative time constraints. We applied a Bayesian relaxed clock approach to propose an alternative interpretation for the histor
Genetics and Molecular Biology. Publicado em: 19/11/2008
-
11. Sistemática e biogeografia do grupo Rhinella marina (Linnaeus, 1758) (Anura: Bufonidae)
This research aims the study of systematics and biogeography of the species in Rhinella marina group (Linnaeus, 1758). The present dissertation was structured in three chapters. The irst chapter presents the description of two new species, throughout central Brazil, and also focuses discussions about the taxonomy of the group. The second chapter investigated
Publicado em: 2008
-
12. Genética molecular dos ritmos circadianos em mosquitos vetores (Diptera: Culicidae). / Molecular genetic of the circadian rhythms in mosquitoes vectors (Diptera: Culicidae).
Relógios biológicos são mecanismos endógenos de marcar a passagem do tempo e podem ser encontrados em animais, plantas, fungos e até organismos unicelulares. No modelo Drosophila, o mecanismo molecular que controla os ritmos circadianos (~24 horas) funciona através de alças de retroalimentação negativa envolvendo alguns genes, sendo os principais: p
Publicado em: 2007