Cytogenetics
Mostrando 13-24 de 278 artigos, teses e dissertações.
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13. Comparative cytogenetics of Astyanax (Teleostei: Characidae) from the upper Paraguay basin
RESUMO Astyanax é um dos táxons mais representados e diversos na região Neotropical. Com o intuito de aumentar as informações citogenéticas para Astyanax e apresentar dados que possam subsidiar estudos taxonômicos futuros, este trabalho traz uma análise citogenética de três espécies de Astyanax: duas espécies consideradas crípticas, aqui reporta
Neotrop. ichthyol.. Publicado em: 26/03/2018
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14. Evidence of genetic differentiation and karyotype evolution of the sedges Cyperus ligularis L. and C. odoratus L. (Cyperaceae)
ABSTRACT The taxonomy of Cyperaceae is complex, with genera like Cyperus harboring species complexes. We analyzed the genetic similarity between Cyperus ligularis L. and C. odoratus L. based on DNA fingerprinting and cytogenetics. Significative genetic differentiation (G ST = 0.363) and low gene flow (N m = 0.877) indicated a clear genetic distinction betwe
Acta Bot. Bras.. Publicado em: 15/01/2018
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15. Protocol for chromosome-specific probe construction using PRINS, micromanipulation and DOP-PCR techniques
ABSTRACT Chromosome-specific probes have been widely used in molecular cytogenetics, being obtained with different methods. In this study, a reproducible protocol for construction of chromosome-specific probes is proposed which associates in situ amplification (PRINS), micromanipulation and degenerate oligonucleotide-primed PCR (DOP-PCR). Human lymphocyte cu
An. Acad. Bras. Ciênc.. Publicado em: 07/12/2017
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16. Cytogenetics and Molecular Genetic Analysis of Chimerism in Marmosets (Callithrix: Primates)
ABSTRACT The birth of fraternal twins is a characteristic frequently observed in callitrichids. Cytogenetic studies have demonstrated hematopoietic chimerism in marmosets with the occurrence of two cell lines 2n=46,XX/46,XY in females and males co-twins, without phenotypic changes. Amplification by PCR have also been used to verify the presence of the SRY ge
An. Acad. Bras. Ciênc.. Publicado em: 2017-12
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17. Cytogenetics of Gymnogeophagus setequedas (Cichlidae: Geophaginae), with comments on its geographical distribution
RESUMO Fornecemos dados citogenéticos para a espécie ameaçada Gymnogeophagus setequedas, e o primeiro registro da espécie coletado no rio Iguaçu, na área de preservação ambiental do Parque Nacional do Iguaçu, a qual é uma área de ocorrência inesperada para esta espécie. Verificamos em G. setequedas 2n = 48 cromossomos (4sm + 24st + 20a) e hetero
Neotrop. ichthyol.. Publicado em: 26/06/2017
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18. Secondary myeloid neoplasms: bone marrow cytogenetic and histological features may be relevant to prognosis
Abstract Background: Secondary myeloid neoplasms comprise a group of diseases arising after chemotherapy, radiation, immunosuppressive therapy or from aplastic anemia. Few studies have addressed prognostic factors in these neoplasms. Method: Forty-two patients diagnosed from 1987 to 2008 with secondary myeloid neoplasms were retrospectively evaluated conce
Rev. Bras. Hematol. Hemoter.. Publicado em: 2017-03
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19. Identification of the MYST3-CREBBP fusion gene in infants with acute myeloid leukemia and hemophagocytosis
ABSTRACT Background: Acute myeloid leukemia presenting the MYST3-CREBBP fusion gene is a rare subgroup associated with hemophagocytosis in early infancy and monocytic differentiation. The aim of this study was to define the relevant molecular cytogenetic characteristics of a unique series of early infancy acute myeloid leukemia cases (≤24 months old), bas
Rev. Bras. Hematol. Hemoter.. Publicado em: 2016-12
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20. Cytogenetics and DNA barcoding of the Round-eared bats, Tonatia (Chiroptera: Phyllostomidae): a new karyotype for Tonatia bidens
ABSTRACT There are two species of Neotropical Round-eared bats, Tonatia bidens Spix, 1823 and Tonatia saurophila Koopman & Williams, 1951, which present highly similar morphological characteristics that can lead to errors of identification. Specimens originally identified as T. bidens have recently been reclassified as T. saurophila, and the only karyotype d
Zoologia (Curitiba). Publicado em: 2015-10
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21. Metaphase cytogenetics and single nucleotide polymorphism arrays in myeloid malignancies
Rev. Bras. Hematol. Hemoter.. Publicado em: 2015-04
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22. Diversity of breakpoints of variant Philadelphia chromosomes in chronic myeloid leukemia in Brazilian patients
Background: Chronic myeloid leukemia is a myeloproliferative disorder characterized by the Philadelphia chromosome or t(9;22)(q34.1;q11.2), resulting in the break-point cluster regionAbelson tyrosine kinase fusion gene, which encodes a constitutively active tyrosine kinase protein. The Philadelphia chromosome is detected by karyotyping in around 90% of chro
Rev. Bras. Hematol. Hemoter.. Publicado em: 2015-02
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23. Cytogenetics of the Brazilian Bolitoglossa paraensis (Unterstein, 1930) salamanders (Caudata, Plethodontidae)
Plethodontid salamanders of genus Bolitoglossa constitute the largest and most diverse group of salamanders, including around 20% of living caudate species. Recent studies have indicated the occurrence of five recognized species in the Brazilian Amazon Rainforest. We present here the first cytogenetic data of a Brazilian salamander, which may prove to be a u
Genet. Mol. Biol.. Publicado em: 2014-09
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24. Human molecular cytogenetics: from cells to nucleotides
The field of cytogenetics has focused on studying the number, structure, function and origin of chromosomal abnormalities and the evolution of chromosomes. The development of fluorescent molecules that either directly or via an intermediate molecule bind to DNA has led to the development of fluorescent in situ hybridization (FISH), a technology linking cytog
Genet. Mol. Biol.. Publicado em: 2014