Abstract:
:We review our progress using genomics approaches to examine key antiviral defenses of the White Pekin mallard duck, Anas platyrhynchos. Our interest stems from the fact that ducks are the natural host of avian influenza, and are an important animal model for hepatitis B research. First, we have conducted an expressed sequence tag (EST) project and identified more than 200 immune relevant genes in the duck. Our analysis of these genes allows us to evaluate the homology between ducks and their closest genetic model organism, the chicken. We have also constructed genomic and cDNA libraries from the same individual duck, allowing us to directly compare expressed sequences with those present in the genome. These resources allow us to determine the organization and expression of regions of the genome important in antiviral defenses. Here we examine the organization of the immunoglobulin heavy chain locus, the Major Histocompatibility Complex class I region, the lectin immunoreceptors and Toll-like receptor 7. We discuss our research-in-progress in the context of the immune defense against viruses, particularly influenza.
journal_name
Cytogenet Genome Resjournal_title
Cytogenetic and genome researchauthors
MacDonald MR,Veniamin SM,Guo X,Xia J,Moon DA,Magor KEdoi
10.1159/000103180subject
Has Abstractpub_date
2007-01-01 00:00:00pages
195-206issue
1-4eissn
1424-8581issn
1424-859Xpii
000103180journal_volume
117pub_type
杂志文章,评审abstract::Chromosomal locations and amounts of 5-methylcytosine-rich chromosome regions were detected in the karyotypes of 13 bird species by indirect immunofluorescence using a monoclonal anti-5-methylcytosine antibody. These species belong to 7 orders and 10 families of modern (Neognathae) and primitive (Palaeognathae) birds ...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000464268
更新日期:2017-01-01 00:00:00
abstract::The formation of heterochromatin begins in the differentiating cells. The aim of this work was to study changes of satellite DNA distribution, transcriptional activity and interaction with certain proteins in mouse embryonic stem cells after induction with retinoic acid. We found that pericentromeric satellites entere...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000218132
更新日期:2009-01-01 00:00:00
abstract::Chromosome microdeletions or duplications are detected in 10-20% of patients with mental impairment and normal karyotypes. A few cases have been reported of mental impairment with microdeletions comprising tumor suppressor genes. By array-CGH we detected 4 mentally impaired individuals carrying de novo microdeletions ...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000218743
更新日期:2009-01-01 00:00:00
abstract::A comparative cytogenetic analysis was carried out on four Hylinae tree frogs from Brazil ((Aparasphenodon brunoi, Corythomantis greeningi, Osteocephalus langsdorffii, and Scinax fuscovarius) using Giemsa staining, BrdU replication banding, Ag-NOR staining, C-banding, DAPI and CMA(3) fluorochrome staining, and fluores...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000076304
更新日期:2003-01-01 00:00:00
abstract::Integrase (IN) and reverse transcriptase (RT) play a central role in transposition of retroelements. The mechanism of integration by IN and the steps of the replication process mediated by RT are briefly described here. Recently, active recombinant forms of Ty1 IN and RT have been obtained. This has allowed a more det...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
doi:10.1159/000084960
更新日期:2005-01-01 00:00:00
abstract::The relationship between the apparently random chromosomal changes found in aneuploidy and the genetic instability driving the progression of cancer is not clear. We report a test of the hypothesis that aneuploid chromosomal abnormalities might be selected to preserve cell-survival genes during loss of heterozygosity ...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000100406
更新日期:2007-01-01 00:00:00
abstract::Normal diploid somatic mammalian cell division generates 2 daughter cells as a result of a strict and well-controlled mitotic process. However, some defects during the progression of that process could generate an unbalanced distribution of chromosomes, aneuploidy and eventually, a malignant phenotype. Previous observ...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000298794
更新日期:2010-01-01 00:00:00
abstract::XIST encodes a functional RNA that is expressed exclusively from the inactive X in female mammals and is required for the silencing of most of the genes on the chromosome. XIST transcripts remain in the nucleus, and their specific localization to the inactive X is important for silencing; however, it is not known how ...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000071579
更新日期:2002-01-01 00:00:00
abstract::Physical mapping of 5S rDNA in 2 species of knifefishes, Gymnotuspantanal and G. paraguensis (Gymnotiformes), was performed using fluorescence in situ hybridization with a 5S rDNA probe. The 5S rDNA PCR product from the genomes of both species was also sequenced and aligned to determine non-transcribed spacer sequence...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000328998
更新日期:2011-01-01 00:00:00
abstract::2q37.3 deletion syndrome belongs to the chromosomal 2q37 deletion spectrum which clinically resembles Albright hereditary osteodystrophy (AHO) syndrome. It is is mainly characterized by short stature, obesity, round face, brachydactyly type E, intellectual disability, behavioral problems, and variable intellectual def...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000431389
更新日期:2015-01-01 00:00:00
abstract::Cytogenetic investigations performed in eight Portuguese cattle breeds revealed the presence of rob(1;29) in both heterozygous and homozygous conditions in all, and five breeds, respectively, with variable percentages of carriers as follows: 41.0% in Arouquesa, 69.9% in Barrosa, 39.4% in Maronesa, 2.8% in Mirandesa, 8...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000118755
更新日期:2008-01-01 00:00:00
abstract::18p deletion syndrome is a rare chromosomal disease caused by deletion of the short arm of chromosome 18. By using cytogenetic and SNP array analysis, we identified a girl with 18p deletion syndrome exhibiting craniofacial anomalies, intellectual disability, and short stature. G-banding analysis of metaphase cells rev...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000487371
更新日期:2018-01-01 00:00:00
abstract::It is widely accepted that the H2AX histone in its phosphorylated form (gamma-H2AX) is related to the repair of DNA double-strand breaks (DSBs). In several organisms, gamma-H2AX presence has been demonstrated in meiotic processes such as recombination and sex chromosome inactivation during prophase I (from leptotene t...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000100416
更新日期:2007-01-01 00:00:00
abstract::It is well known that TP53 may mediate apoptosis triggered by anticancer drugs. However, accumulating evidence indicates that TP53 may be inactivated by mutations and/or deletions in about 50% of human cancers and, as such, may lead to pronounced resistance to therapeutic agents. Thus, the development of new approache...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000227831
更新日期:2009-01-01 00:00:00
abstract::Scanning electron microscopy (SEM) proves to be an appropriate technique for imaging chromatin organization in meiosis I and II of rye (Secale cereale) down to a resolution of a few nanometers. It could be shown for the first time that organization of basic structural elements (coiled and parallel fibers, chromomeres)...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000078021
更新日期:2004-01-01 00:00:00
abstract::Maternal uniparental disomy (UPD) 15 is one of the molecular causes of Prader-Willi syndrome (PWS), a multisystem disorder which presents with neonatal hypotonia and feeding difficulty. Current diagnostic algorithms differ regarding the use of SNP microarray to detect PWS. We retrospectively examined the frequency wit...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000478921
更新日期:2017-01-01 00:00:00
abstract::The mammalian collagen, type IX, alpha 2 gene (COL9A2) encodes the alpha-2 chain of type IX collagen and is located on horse chromosome 2p16-->p14 harbouring a quantitative trait locus for osteochondrosis. We isolated a bacterial artificial chromosome (BAC) clone containing the equine COL9A2 gene and determined the co...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000095229
更新日期:2006-01-01 00:00:00
abstract::To study the origin and evolution of naturally occurring polyploids, we performed phylogenetic analyses of nuclear ribosomal DNA spacers combined with molecular cytogenetics in 55 accessions of 27 taxa of the oat genus Helictochloa. A complex pattern of reticulate evolution was revealed with many diploid species and e...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000361002
更新日期:2014-01-01 00:00:00
abstract::The Congo African grey parrot (Psittacus erithacus, PER) is an endemic species of Central Africa, valued for its intelligence and listed as vulnerable due to poaching and habitat destruction. Improved knowledge about the P. erithacus genome is needed to address key biological questions and conservation of this species...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000444136
更新日期:2015-01-01 00:00:00
abstract::The suborder Serpentes is divided into 2 infraorders, Scolecophidia and Alethinophidia, which diverged at an early stage of snake diversification. In this study, we examined karyotypes of 4 scolecophidian species (Letheobia simonii, Xerotyphlops vermicularis, Indotyphlops braminus, and Myriopholis macrorhyncha) and pe...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000496554
更新日期:2019-01-01 00:00:00
abstract::Previous genetic mapping identified three linkage groups (M1, M18 and M26) in the turkey corresponding to chicken chromosome 1 (GGA1). This is inconsistent with previously described chromosomal differences between these species. FISH analysis of BAC clones corresponding to microsatellite markers from each of the three...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000095239
更新日期:2006-01-01 00:00:00
abstract::Scapinin has been found to bind to cytoplasmic actin and is also a putative regulatory subunit of protein phosphatase-1 (PP1). It is found attached to the nuclear matrix-intermediate filament (NM-IF) and is down-regulated by differentiation of tumor cells. We have analyzed the genomic structure and tissue-specific exp...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000094797
更新日期:2006-01-01 00:00:00
abstract::We analyzed the DNA amount in X and B chromosomes of 2 XX/X0 grasshopper species (Eyprepocnemis plorans and Locusta migratoria), by means of Feulgen image analysis densitometry (FIAD), using previous estimates in L. migratoria as standard (5.89 pg). We first analyzed spermatids of 0B males and found a bimodal distribu...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000324690
更新日期:2011-01-01 00:00:00
abstract::Coamplification of multiple segments of chromosome 2, including an MYCN-bearing segment, was examined in 2 cancer cell lines, NCI-H69 (lung cancer) and IMR-32 (neuroblastoma). High-resolution array-CGH analysis revealed 13 and 6 highly amplified segments located at different sites in chromosome 2 in NCI-H69 and IMR-32...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000334349
更新日期:2012-01-01 00:00:00
abstract::The T2 family of miniature inverted-repeat transposable elements (T2-MITE) is a prevalent MITE family found in both Xenopus(Silurana) tropicalis and X. laevis. Some subfamilies, particularly T2-A1 and T2-C, may have originated prior to the diversification of the 2 Xenopus lineages and currently include active members ...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000430764
更新日期:2015-01-01 00:00:00
abstract::An important aspect of genome reprogramming is the establishment and maintenance of gamete-specific DNA methylation patterns that distinguish the parental alleles of imprinted genes. Disrupting the accurate transmission of genomic imprints by interfering with these methylation patterns causes severe defects in fetal g...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
doi:10.1159/000090822
更新日期:2006-01-01 00:00:00
abstract::Genome projects allow us to sample copies of a retrotransposon sequence family residing in a host genome. The variation in DNA sequence between these individual copies will reflect the evolutionary process that has spread the sequences through the genome. Here I review quantitatively the expected diversity of elements...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
doi:10.1159/000084970
更新日期:2005-01-01 00:00:00
abstract::The X chromosomes of the extant equids, in general, share morphology and banding pattern similarities. However, the donkey X is, in part, an exception because of significantly different centromeric index and variant banding patterns in the pericentromeric region. To verify the underlying molecular basis of this differ...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000063050
更新日期:2002-01-01 00:00:00
abstract::The genus Hypostomus has a broad geographic distribution in Brazilian rivers and comprises armored catfishes with a very complicated taxonomy due to the absence of morphological autapomorphies. The existence of nearly 10 allopatric populations with different karyotypes suggests that Hypostomusancistroides represents a...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000492959
更新日期:2018-09-28 00:00:00
abstract::Klinefelter's syndrome (KS) is the most common sex chromosome abnormality identified in human males. This syndrome is generally associated with infertility. Men with KS may have a 47,XXY or a 46,XY/47,XXY karyotype. Studies carried out in humans and mice suggest that only XY cells are able to enter and complete meiosi...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000321794
更新日期:2011-01-01 00:00:00