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1.
Karl JA Wiseman RW Campbell KJ Blasky AJ Hughes AL Ferguson B Read DS O'Connor DH 《Immunogenetics》2008,60(1):37-46
The rhesus macaque (Macaca mulatta) is an excellent model for human disease and vaccine research. Two populations exhibiting distinctive morphological and physiological
characteristics, Indian- and Chinese-origin rhesus macaques, are commonly used in research. Genetic analysis has focused on
the Indian macaque population, but the accessibility of these animals for research is limited. Due to their greater availability,
Chinese rhesus macaques are now being used more frequently, particularly in vaccine and biodefense studies, although relatively
little is known about their immunogenetics. In this study, we discovered major histocompatibility complex (MHC) class I cDNAs
in 12 Chinese rhesus macaques and detected 41 distinct Mamu-A and Mamu-B sequences. Twenty-seven of these class I cDNAs were novel, while six and eight of these sequences were previously reported
in Chinese and Indian rhesus macaques, respectively. We then performed microsatellite analysis on DNA from these 12 animals,
as well as an additional 18 animals, and developed sequence specific primer PCR (PCR-SSP) assays for eight cDNAs found in
multiple animals. We also examined our cohort for potential admixture of Chinese and Indian origin animals using a recently
developed panel of single nucleotide polymorphisms (SNPs). The discovery of 27 novel MHC class I sequences in this analysis
underscores the genetic diversity of Chinese rhesus macaques and contributes reagents that will be valuable for studying cellular
immunology in this population. 相似文献
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Spatial arrangement of pig MHC class I sequences 总被引:4,自引:4,他引:4
Florian W. Velten Christine Renard Claire Rogel-Gaillard Marcel Vaiman Patrick Chardon 《Immunogenetics》1999,49(11-12):919-930
Bacterial artificial chromosome (BAC) clones were assigned within the pig major histocompatibility complex (Mhc) by polymerase chain reaction-screening and Southern blot hybridization using sequence-tagged site (STS) markers and BAC end-rescued sequences. In all, 35 BAC clones were discovered containing 12 anchor genes of the SLA class I region and two genes of the SLA class III region. Twenty of these 35 clones comprised two distinct class I gene clusters, each spanning about 100 kilobases. One cluster enclosed three class I related genes (SLA-6 to -8) and two genes (MIC-1 and MIC-2) more distantly related to class I. The other cluster enclosed typical class I genes, of which three (SLA-1, -2, and -3) were transcribed by fibroblasts homozygous for the H01 haplotype which we used to construct a pig BAC library. Ordered clones are certainly helpful in isolating agronomically, biologically, and medically important genes. They would also be useful for inducing genetic modifications in pig cell lines. 相似文献
4.
Correspondence to: D. I. Watkins. 相似文献
5.
Kevin J. Campbell Ann M. Detmer Julie A. Karl Roger W. Wiseman Alex J. Blasky Austin L. Hughes Benjamin N. Bimber Shelby L. O’Connor David H. O’Connor 《Immunogenetics》2009,61(3):177-187
Cynomolgus macaques (Macaca fascicularis) provide increasingly common models for infectious disease research. Several geographically distinct populations of these
macaques from Southeast Asia and the Indian Ocean island of Mauritius are available for pathogenesis studies. Though host
genetics may profoundly impact results of such studies, similarities and differences between populations are often overlooked.
In this study we identified 47 full-length MHC class I nucleotide sequences in 16 cynomolgus macaques of Filipino origin.
The majority of MHC class I sequences characterized (39 of 47) were unique to this regional population. However, we discovered
eight sequences with perfect identity and six sequences with close similarity to previously defined MHC class I sequences
from other macaque populations. We identified two ancestral MHC haplotypes that appear to be shared between Filipino and Mauritian
cynomolgus macaques, notably a Mafa-B haplotype that has previously been shown to protect Mauritian cynomolgus macaques against challenge with a simian/human immunodeficiency
virus, SHIV89.6P. We also identified a Filipino cynomolgus macaque MHC class I sequence for which the predicted protein sequence differs from
Mamu-B*17 by a single amino acid. This is important because Mamu-B*17 is strongly associated with protection against simian immunodeficiency virus (SIV) challenge in Indian rhesus macaques. These
findings have implications for the evolutionary history of Filipino cynomolgus macaques as well as for the use of this model
in SIV/SHIV research protocols.
Kevin J. Campbell and Ann M. Detmer contributed equally to this work. 相似文献
6.
7.
The major histocompatibility complex B (MHC B) region in a standard haplotype of Leghorn chickens contains two closely linked class I loci, B-FI and B-FIV. Few sequences of B-FI alleles are available, and therefore alleles of the two loci have not been compared with regard to sequence diversity or locus specificity. Here, we report eight new B-F alpha 1/alpha 2-coding sequences from broiler chicken MHC B haplotypes, and a unique recombinant between the two B-F loci. The new sequences were combined with existing B-F sequences from Leghorn and broiler haplotypes for analysis. On the basis of phylogenetic analysis and conserved sequence motifs, B-F sequences separated into two groups (Groups A and B), corresponding to B-FIV and B-FI locus, respectively. Every broiler haplotype had one B-F sequence in Group A and the second B-F sequence, if it existed, clustered in Group B. Group B (presumptive B-FI locus) sequences identified in broiler haplotypes resembled the human MHC class I HLA-C locus in their distinctive pattern of allelic polymorphism. Compared with B-FIV, B-FI alleles were less polymorphic and possessed a conserved locus-specific motif in the alpha1 helix, but nevertheless demonstrated evidence of diversifying selection. One B-FI alpha 1/alpha 2-coding nucleotide sequence was completely conserved in four different broiler haplotypes, but each allele differed in the exon encoding the alpha 3 domain. 相似文献
8.
By determining the nucleotide sequences of more than 700 cDNA clones isolated from 16 cynomolgus monkeys, we identified 26 Mafa-B alleles. In addition, nine sequences with similarity to Mamu-I alleles were identified. Since multiple Mafa-B alleles were found in each individual, it was strongly suggested that the cynomolgus MHC class I B locus might be duplicated and that the Mafa-I locus was derived from the B locus by gene duplication, as in the case of the Mamu-I locus of rhesus monkeys. 相似文献
9.
Otting N de Vos-Rouweler AJ Heijmans CM de Groot NG Doxiadis GG Bontrop RE 《Immunogenetics》2007,59(5):367-375
The HLA-A locus represents a single copy gene that displays abundant allelic polymorphism in the human population, whereas, in contrast, a nonhuman primate species such as the rhesus macaque (Macaca mulatta) possesses multiple HLA-A-like (Mamu-A) genes, which parade varying degrees of polymorphism. The number and combination of transcribed Mamu-A genes present per chromosome display diversity in a population of Indian animals. At present, it is not clearly understood whether these different A region configurations are evolutionarily stable entities. To shed light on this issue, rhesus macaques from a Chinese population and a panel of cynomolgus monkeys (Macaca fascicularis) were screened for various A region-linked variations. Comparisons demonstrated that most A region configurations are old entities predating macaque speciation, whereas most allelic variation (>95%) is of more recent origin. The latter situation contrasts the observations of the major histocompatibility complex class II genes in rhesus and cynomolgus macaques, which share a high number of identical alleles (>30%) as defined by exon 2 sequencing. 相似文献
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T lymphocytes play a key role in the immune response to both foreign and self peptide antigens, which they recognize in combination with MHC molecules. In the past it has been difficult to analyse objectively the specificity, frequency and intensity of T cell responses. The recent application of fluorescent-labelled MHC class I multimers, however, has provided a powerful experimental approach to the direct visualisation of antigen-specific T cells. As a result, our perspective of how T cells respond to both viruses and other antigens in vivo has been greatly enhanced. 相似文献
12.
T lymphocytes play a key role in the immune response to both foreign and self peptide antigens, which they recognize in combination with MHC molecules. In the past it has been difficult to analyse objectively the specificity, frequency and intensity of T cell responses. The recent application of fluorescent-labelled MHC class I multimers, however, has provided a powerful experimental approach to the direct visualisation of antigen-specific T cells. As a result, our perspective of how T cells respond to both viruses and other antigens in vivo has been greatly enhanced. 相似文献
13.
A nucleotide sequence analysis of a fragment of a Morone MHC class Ia gene detected high levels of polymorphism in striped bass Morone saxatilis, white perch Morone americana and yellow bass Morone mississippiensis. Extremely low levels of MHC diversity, however, were detected in white bass Morone chrysops, suggesting the possibility of a severe population bottleneck for this species. 相似文献
14.
A rodent class I MHC determinant is shared among many species 总被引:1,自引:0,他引:1
Heather C. Boyd Terry A. Potter T. V. Rajan Chester M. Zmijewski Thomas J. McKearn 《Immunogenetics》1983,18(2):183-187
15.
Remarkable conservation of distinct nonclassical MHC class I lineages in divergent amphibian species 总被引:1,自引:0,他引:1
Pulmonary surfactant contains homeostatic and antimicrobial hydrolases. When Mycobacterium tuberculosis is initially deposited in the terminal bronchioles and alveoli, as well as following release from lysed macrophages, bacilli are in intimate contact with these lung surfactant hydrolases. We identified and measured several hydrolases in human alveolar lining fluid and lung tissue that, at their physiological concentrations, dramatically modified the M. tuberculosis cell envelope. Independent of their action time (15 min to 12 h), the effects of the hydrolases on the M. tuberculosis cell envelope resulted in a significant decrease (60-80%) in M. tuberculosis association with, and intracellular growth of the bacteria within, human macrophages. The cell envelope-modifying effects of the hydrolases also led to altered M. tuberculosis intracellular trafficking and induced a protective proinflammatory response to infection. These findings add a new concept to our understanding of M. tuberculosis-macrophage interactions (i.e., the impact of lung surfactant hydrolases on M. tuberculosis infection). 相似文献
16.
Three different MHC class I molecules bind the same CTL epitope of the influenza virus in a primate species with limited MHC class I diversity 总被引:1,自引:0,他引:1
Evans DT Knapp LA Jing P Piekarczyk MS Hinshaw VS Watkins DI 《Journal of immunology (Baltimore, Md. : 1950)》1999,162(7):3970-3977
One of the most remarkable features of the MHC class I loci of most outbred mammalian populations is their exceptional diversity, yet the functional importance of this diversity remains to be fully understood. The cotton-top tamarin (Saguinus oedipus) is unusual in having MHC class I loci that exhibit both limited polymorphism and sequence variation. To investigate the functional implications of limited MHC class I diversity in this outbred primate species, we infected five tamarins with influenza virus and defined the CTL epitopes recognized by each individual. In addition to an immunodominant epitope of the viral nucleoprotein (NP) that was recognized by all individuals, two tamarins also made a response to the same epitope of the matrix (M1) protein. Surprisingly, these two tamarins used different MHC class I molecules, Saoe-G*02 and -G*04, to present the M1 epitope. In addition, CTLs from one of the tamarins recognized target cells that expressed neither Saoe-G*02 nor -G*04, but, rather, a third MHC class I molecule, Saoe-G*12. Sequence analysis revealed that Saoe-G*12 differs from both Saoe-G*02 and -G*04 by only two nucleotides and was probably generated by recombination between these two alleles. These results demonstrate that at least three of the tamarin's MHC class I molecules can present the same epitope to virus-specific CTLs. Thus, four of the tamarin's 12 MHC class I molecules bound only two influenza virus CTL epitopes. Therefore, the functional diversity of cotton-top tamarin's MHC class I loci may be even more limited than their genetic diversity suggests. 相似文献
17.
David T. Evans Marian S. Piekarczyk Luis Cadavid Virginia S. Hinshaw D. I. Watkins 《Immunogenetics》1998,47(3):206-211
The products of the highly polymorphic and variable major histocompatibility complex (MHC) class I loci play a crucial role
in host defenses against infectious disease. While similar alleles have been found in closely related species, sharing of
a functional MHC class I allele between two species has never been reported. Here we show that an identical functional MHC
class I molecule is present in two different primate species with an approximate divergence time of 0.7 million years. Lymphocytes
from the red-crested tamarin (Saguinus geoffroyi) expressed an MHC class I allele (Sage-G
*
01) that was identical in coding sequence to an MHC class I allele (Saoe-G
*
08) found in the cotton-top tamarin (Saguinus oedipus). Furthermore, influenza virus-specific cytotoxic T lymphocytes (CTLs) generated in the cotton-top tamarin killed lymphocytes
expressing the influenza virus nucleoprotein (NP) from the red-crested tamarin. Since the influenza virus NP epitope is bound
by Saoe-G*08 in the cotton-top tamarin, it is likely that this molecule is functional in both species. These data provide the first
evidence that functional MHC class I molecules can be maintained entirely intact in two separate species.
Received: 6 June 1997 / Revised: 21 July 1997 相似文献
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J F Kaufman M F Flajnik L Du Pasquier P Riegert 《Journal of immunology (Baltimore, Md. : 1950)》1985,134(5):3248-3257
Class II antigens from the Xenopus laevis MHC (f haplotype) were identified by using a rabbit antihuman class II beta-chain serum (anti-p29boost). This xenoantiserum inhibits bidirectional Xenopus MLR (but not PHA-stimulation), recognizes the same molecules as certain MHC-linked Xenopus alloantisera, and immunoprecipitates class II molecules from Xenopus cells consistent with the tissue distribution of mammalian class II molecules. The Xenopus class II molecules are composed of two different chains, both of which are 30 to 35kD transmembrane glycoproteins. The alpha-chains have some N-terminal sequence homology with mammalian class II alpha-chains (both I-E/DR and I-A/DC); the beta-chains are directly recognized by anti-p29boost and have a markedly increased SDS gel mobility under nonreducing conditions. During biosynthesis, they are noncovalently associated with a number of other chains, including ones at 25kD, 33kD, and 40 to 45kD. The alpha-chains bear three N-linked glycans (two Endo H insensitive in mature material) and the beta-chains bear two (one Endo H insensitive). Unlike most mammalian class II molecules, the deglycosylated beta-chains are significantly larger and more acidic than the alpha-chains. 相似文献
20.
Nucleotide sequences of chimpanzee MHC class I alleles: evidence for trans-species mode of evolution 总被引:24,自引:1,他引:24 下载免费PDF全文
To obtain an insight into the evolutionary origin of the major histocompatibility complex (MHC) class I polymorphism, a cDNA library was prepared from a heterozygous chimpanzee cell line expressing MHC class I molecules crossreacting with allele-specific HLA-A11 antibodies. The library was screened with human class I locus-specific DNA probes, and clones encoding both alleles at the A and B loci have been identified and sequenced. In addition, the sequences of two HLA-A11 subtypes differing by a single nucleotide substitution have been obtained. The comparison of chimpanzee and human sequences revealed a close similarity (up to 98.5%). The chimpanzee A locus alleles showed greatest similarity to the human HLA-A11/A3 family of alleles, one of them being very close to HLA-A11. Similarly, segments of the ChLA-B alleles displayed greatest similarity to certain HLA-B alleles. The calculated evolutionary branch point for the A11-like alleles is 7 x 10(6) to 9 x 10(6) years, whereas the other A locus alleles diverged between 12 x 10(6) and 17 x 10(6) years ago. Since the human and chimpanzee lineages separated 5 x 10(6) to 7 x 10(6) years ago, our data support the notion that during evolution, MHC alleles are transmitted from one species to the next. 相似文献