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排序方式: 共有98条查询结果,搜索用时 31 毫秒
1.
Luigi D. Notarangelo Ornella Parolini Fulvio Porta Franco Locatelli Arnalda Lanfranchi Massimo Marconi Luigi Nespoli Alberto Albertini Ian W. Craig Alberto G. Ugazio 《Human genetics》1991,88(2):237-241
Summary We report on a thrombocytopenic female belonging to a pedigree with the Wiskott-Aldrich syndrome (WAS). Restriction fragment length polymorphism (RFLP) analysis with probe M27, closely linked to the WAS gene, demonstrated that she is a carrier of WAS. Both small-sized and normal-sized platelets were present, suggesting that, unlike the vast majority of WAS carriers, she does not manifest nonrandom X-chromosome inactivation in the thrombopoietic cell lineage. Study of X-chromosome inactivation by means of RFLP and methylation analysis demonstrated that the pattern of X-chromosome inactivation was nonrandom in T lymphocytes, but random in granulocytes. While this is the first complete report on the occurrence of thrombocytopenia in a carrier female of WAS as the result of atypical lyonization, it also suggests that expression of the WAS gene occurs at (or extends up to) a later stage than the multipotent stem cell along the hematopoietic differentiation pathway. 相似文献
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Characterization of Nine Novel Mutations in the CD40 Ligand Gene in Patients with X-Linked Hyper IgM Syndrome of Various Ancestry 总被引:3,自引:0,他引:3 下载免费PDF全文
Paolo Macchi Anna Villa Dario Strina Maria Grazia Sacco Federica Morali Duilio Brugnoni Silvia Giliani Elide Mantuano Anders Fasth Bengt Andersson Ben J. M. Zegers Giovanni Cavagni Igor Reznick Jacov Levy Israel Zan-Bar Yael Porat Paolo Air Alessandro Plebani Paolo Vezzoni Luigi D. Notarangelo 《American journal of human genetics》1995,56(4):898-906
X-linked immunodeficiency with hyper-IgM (HIGMX-1) is a rare disorder caused by defective expression of the CD40 ligand (CD40L) by activated T lymphocytes, resulting in inefficient T-B cell cooperation and failure of B cells to undergo immunoglobulin isotype switch. In the present work, we describe nine patients of various ancestry who bear different mutations in the X chromosome–specific CD40L gene. Two of the mutations were nonsense mutations, one each resulting in premature stop codons at amino acid residues 39 and 140. Three patients had single point missense mutations, one each at codons 126, 140, and 144. Another patient had a 4-bp genomic deletion in exon 2, resulting in a frameshift and premature termination. Three patients showed insertions, one each of 1, 2, and 4 nt, probably because of polymerase slippage, resulting in frameshift mutation and premature termination. Overall, these observations confirm the heterogeneity of mutations in HIGMX-1. However, the identification of two patients whose mutation involves codon 140 (previously shown to be altered in two other unrelated subjects) suggests that this may be a hotspot of mutation in HIGMX-1. In two additional patients with clinical and immunological features indistinguishable from canonical HIGMX-1, no mutation was detected in the coding sequence, in the 5' flanking region, or in the 3' UTR. 相似文献
4.
Irisin was first identified in muscle cells. We detected irisin immunoreactivity in various organs of the crested porcupine (Hystrix cristata). In the epidermis, irisin immunoreactivity was localized mainly in stratum basale, stratum spinosum and stratum granulosum layers; immunoreactivity was not observed in the stratum corneum. In the dermis, irisin was found in the external and internal root sheath, cortex and medulla of hair follicles, and in sebaceous glands. Irisin immunoreactivity was found in the neural retina and skeletal muscle fibers associated with the eye. The pineal and thyroid glands also exhibited irisin immunoreactivity. 相似文献
5.
Notarangelo LD Giliani S Mazzolari E Gulino AV 《Reviews in clinical and experimental hematology》2003,7(1):84-111
Primary immune deficiencies (PID) represent inborn errors of immunity. Over the years, detailed analysis of the clinical and laboratory features associated with these unique and rare disorders have shed light on the complex array of signals and processes that govern development and activation of the immune system. While the first examples of PID pertained to severe defects in lymphoid development, more recently a variety of gene defects have been identified in humans that do not compromize the ability to generate lymphocytes, but rather result in profound immune dysregulation. In many cases, identification of the molecular and cellular bases of PID has preceeded development of animal models by gene targeting. Finally, since the very first cases reported in humans, PID have also represented a unique tool to investigate the efficacy of novel therapeutic approaches (from molecular therapy to hematopoietic stem cell transplantation to somatic cells gene therapy), that have been applied or may apply to a variety of more common human diseases. 相似文献
6.
Lappalainen I Giliani S Franceschini R Bonnefoy JY Duckett C Notarangelo LD Vihinen M 《Biochemical and biophysical research communications》2000,269(1):124-130
X-linked lymphoproliferative disease (XLP) is a rare and severe immune deficiency, characterized by abnormal immune responses to the Epstein-Barr virus. Recently, the gene responsible for XLP, SH2D1A, has been identified and shown to code for a small cytoplasmic protein with an SH2 domain that interacts with SLAM and 2B4, two receptorial molecules involved in signal transduction in T and NK cells, respectively. A variety of SH2D1A gene mutations have been reported thus far in XLP males. Here we describe a single-strand conformation polymorphism assay for mutation analysis in XLP. Four novel patients with SH2D1A mutations are described. These mutants, and the others previously reported in the literature, have been included in a Registry (SH2D1Abase) that is fully accessible on the World Wide Web. A three-dimensional model of the SH2 domain of the SH2D1A protein has been developed, based on homology with other SH2 domains. The structural consequences of disease-causing SH2D1A mutations are discussed. 相似文献
7.
Schumacher RF Mella P Badolato R Fiorini M Savoldi G Giliani S Villa A Candotti F Tampalini A O'Shea JJ Notarangelo LD 《Human genetics》2000,106(1):73-79
JAK3 deficiency in humans results in autosomal recessive T-B+ severe combined immunodeficiency disease (SCID), a severe immunodeficiency that can only be cured by bone marrow transplantation. We unraveled the complete organization of the human JAK3 gene, which includes 23 exons. This information allowed us to set up a molecular screening test that enabled us to diagnose JAK3 deficiency in 14 patients from 12 unrelated families with T-B+ SCID. In order to define the mutations, we used a nonradioactive single-strand conformation polymorphism (SSCP)/heteroduplex (HD) assay based on exon-specific polymerase chain reaction (PCR). In this cohort of patients, 15 independent JAK3 gene mutations have been identified, including 7 that have not been described previously. Mutation analysis information was used for genetic counseling and prenatal diagnosis. 相似文献
8.
Marta Centra Elena Memeo Maria d'Apolito Maria Savino Leonarda Ianzano Angelo Notarangelo Jingmei Liu Norman A Doggett Leopoldo Zelante Anna Savoia 《Genomics》1998,51(3):463
Fanconi anemia (FA) is a genetically heterogeneous disease with at least eight genes on the basis of complementation groups (FAAtoFAH). The analysis of theFAAgene in patients suggested the existence of deletions, none of which have thus far been characterized at the genomic level. A detailed restriction map of theFAAgene with the fine localization of its 43 exons is reported in this paper. We also describe the first two genomic deletions, one of 5.0 kb and another of at least 120 kb. The former was likely the result of a recombination between relatedAlusequences. Since these interspersed repeats could generate deletions and insertions by mispairing, rearrangements of this gene are a possibility in those FA families in whichFAAmutations have not been identified. 相似文献
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Andréia S Lessa Bruno D Paredes Juliana V Dias Adriana B Carvalho Luiz Fernando Quintanilha Christina M Takiya Bernardo R Tura Guilherme FM Rezende Antonio C Campos de Carvalho Célia MC Resende Regina CS Goldenberg 《BMC veterinary research》2010,6(1):1-10