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Chapel-Fernandes S, Movia C, Jordier F, Durousseau de Coulgeans C, Chiaroni J, Bailly P. DO/ART4 gene sequencing in sub-Saharan cohorts and African migrants: useful data describing the diversity and spreading of rare variants. Transfusion 2019; 59:3755-3766. [PMID: 31750977 DOI: 10.1111/trf.15572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 09/17/2019] [Accepted: 09/29/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND Due to the unavailability of immunological reagents, the Dombrock blood group is insufficiently explored in African populations and can be a source of alloimmunization. A large study including pygmoid and nonpygmoid ethnic groups from East, Central, and West continental Africa, together with African migrants like Comorians, Afro-Caribbean from Martinique, and Maroons from French Guiana would be helpful to increase transfusion safety. STUDY DESIGN AND METHODS Using genomic DNA extracted from blood samples collected from 336 nonpygmoid and 51 pygmoid Africans as well as 268 samples of African descent, DO coding regions were PCR-amplified and sequenced. RESULTS DO*A and DO*B alleles were detected in almost all groups, with a clear predominance of DO*B in every cohort tested. DO*JO and DO*HY allele frequencies reached 10% or more in several ethnic groups. DO*B-SH-Gln149Lys, DO*B-Ile5Thr, and DO*DODE variants were identified both in African ethnic groups and outside Africa. Twelve novel variants were characterized on a DO*A or a DO*B background. Five of them were found in both African and migrant cohorts, the others were restricted to either within or outside Africa. No DO*DOYA, DO*DOLG, DO*DOLC, nor DO*DOMR variants were observed. A first phylogenetic tree was proposed including all variant alleles. CONCLUSION This study across continental Africa and countries with African migrants provides a useful overview of Dombrock allele diversity and distribution. The identification of 12 new alleles underlines the importance of genotyping for Dombrock alleles, particularly to improve transfusion safety in countries hosting migrant populations of African descent.
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Affiliation(s)
- Sylvie Chapel-Fernandes
- Etablissement Français du Sang PACA Corse, «Biologie des Groupes Sanguins», Marseille, France.,Aix Marseille Univ., CNRS, EFS, ADÉS, «Biologie des Groupes Sanguins», Marseille, France
| | - Catherine Movia
- Etablissement Français du Sang PACA Corse, «Biologie des Groupes Sanguins», Marseille, France.,Aix Marseille Univ., CNRS, EFS, ADÉS, «Biologie des Groupes Sanguins», Marseille, France
| | - François Jordier
- Etablissement Français du Sang PACA Corse, «Biologie des Groupes Sanguins», Marseille, France.,Aix Marseille Univ., CNRS, EFS, ADÉS, «Biologie des Groupes Sanguins», Marseille, France
| | - Cécile Durousseau de Coulgeans
- Etablissement Français du Sang PACA Corse, «Biologie des Groupes Sanguins», Marseille, France.,Aix Marseille Univ., CNRS, EFS, ADÉS, «Biologie des Groupes Sanguins», Marseille, France
| | - Jacques Chiaroni
- Etablissement Français du Sang PACA Corse, «Biologie des Groupes Sanguins», Marseille, France.,Aix Marseille Univ., CNRS, EFS, ADÉS, «Biologie des Groupes Sanguins», Marseille, France
| | - Pascal Bailly
- Etablissement Français du Sang PACA Corse, «Biologie des Groupes Sanguins», Marseille, France.,Aix Marseille Univ., CNRS, EFS, ADÉS, «Biologie des Groupes Sanguins», Marseille, France
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2
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Di Girolamo M, Fabrizio G. Overview of the mammalian ADP-ribosyl-transferases clostridia toxin-like (ARTCs) family. Biochem Pharmacol 2019; 167:86-96. [PMID: 31283932 DOI: 10.1016/j.bcp.2019.07.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 07/03/2019] [Indexed: 01/22/2023]
Abstract
Mono-ADP-ribosylation is a reversible post-translational protein modification that modulates the function of proteins involved in different cellular processes, including signal transduction, protein transport, transcription, cell cycle regulation, DNA repair and apoptosis. In mammals, mono-ADP-ribosylation is mainly catalyzed by members of two different classes of enzymes: ARTCs and ARTDs. The human ARTC family is composed of four structurally related ecto-mono-ARTs, expressed at the cell surface or secreted into the extracellular compartment that are either active mono-ARTs (hARTC1, hARTC5) or inactive proteins (hARTC3, hARTC4). The human ARTD enzyme family consists of 17 multidomain proteins that can be divided on the basis of their catalytic activity into polymerases (ARTD1-6), mono-ART (ARTD7-17), and the inactive ARTD13. In recent years, ADP-ribosylation was intensively studied, and research was dominated by studies focusing on the role of this modification and its implication on various cellular processes. The aim of this review is to provide a general overview of the ARTC enzymes. In the following sections, we will report the mono-ADP-ribosylation reactions that are catalysed by the active ARTC enzymes, with a particular focus on hARTC1 that recently has been intensively studied with the discovery of new targets and functions.
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Affiliation(s)
- Maria Di Girolamo
- SoL&Pharma s.r.l. Biotechnology Research, Registered Office, Via Brasile 13, 66030 Mozzagrogna, CH, Italy.
| | - Gaia Fabrizio
- SoL&Pharma s.r.l. Biotechnology Research, Registered Office, Via Brasile 13, 66030 Mozzagrogna, CH, Italy
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Stevens LA, Moss J. Mono-ADP-Ribosylation Catalyzed by Arginine-Specific ADP-Ribosyltransferases. Methods Mol Biol 2019; 1813:149-165. [PMID: 30097866 DOI: 10.1007/978-1-4939-8588-3_10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Methods are described for determination of arginine-specific mono-ADP-ribosyltransferase activity of purified proteins and intact cells by monitoring the transfer of ADP-ribose from NAD+ to a model substrate, e.g., arginine, agmatine, and peptide (human neutrophil peptide-1 [HNP1]), and for the nonenzymatic hydrolysis of ADP-ribose-arginine to ornithine, a noncoded amino acid. In addition, preparation of purified ADP-ribosylarginine is included as a control substrate for ADP-ribosylation reactions.
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Affiliation(s)
- Linda A Stevens
- Pulmonary Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Joel Moss
- Pulmonary Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
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Menzel S, Adriouch S, Bannas P, Haag F, Koch-Nolte F. Monitoring Expression and Enzyme Activity of Ecto-ARTCs. Methods Mol Biol 2018; 1813:167-186. [PMID: 30097867 DOI: 10.1007/978-1-4939-8588-3_11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Mammalian ARTCs are expressed as glycosylphosphatidylinositol (GPI)-anchored ectoenzymes (ARTC1-ARTC4) or secretory proteins (ARTC5) by different cell types. The ARTC2 enzymes catalyze mono-ADP-ribosylation of arginine residues in the extracellular domain of membrane proteins or secretory proteins. In this chapter we provide protocols to monitor the expression and activity of ARTCs on the cell membrane of living cells and in soluble form in biological fluids.
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Affiliation(s)
- Stephan Menzel
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sahil Adriouch
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Faculty of Medicine, University of Rouen, Rouen, France
| | - Peter Bannas
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Friedrich Haag
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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5
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Bioinformatics insight into glycosyltransferase gene expression in gastric cancer: POFUT1 is a potential biomarker. Biochem Biophys Res Commun 2017; 483:171-177. [DOI: 10.1016/j.bbrc.2016.12.172] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 12/26/2016] [Indexed: 11/22/2022]
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Denvir J, Boskovic G, Fan J, Primerano DA, Parkman JK, Kim JH. Whole genome sequence analysis of the TALLYHO/Jng mouse. BMC Genomics 2016; 17:907. [PMID: 27835940 PMCID: PMC5106808 DOI: 10.1186/s12864-016-3245-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 11/02/2016] [Indexed: 12/22/2022] Open
Abstract
Background The TALLYHO/Jng (TH) mouse is a polygenic model for obesity and type 2 diabetes first described in the literature in 2001. The origin of the TH strain is an outbred colony of the Theiler Original strain and mice derived from this source were selectively bred for male hyperglycemia establishing an inbred strain at The Jackson Laboratory. TH mice manifest many of the disease phenotypes observed in human obesity and type 2 diabetes. Results We sequenced the whole genome of TH mice maintained at Marshall University to a depth of approximately 64.8X coverage using data from three next generation sequencing runs. Genome-wide, we found approximately 4.31 million homozygous single nucleotide polymorphisms (SNPs) and 1.10 million homozygous small insertions and deletions (indels) of which 98,899 SNPs and 163,720 indels were unique to the TH strain compared to 28 previously sequenced inbred mouse strains. In order to identify potentially clinically-relevant genes, we intersected our list of SNP and indel variants with human orthologous genes in which variants were associated in GWAS studies with obesity, diabetes, and metabolic syndrome, and with genes previously shown to confer a monogenic obesity phenotype in humans, and found several candidate variants that could be functionally tested using TH mice. Further, we filtered our list of variants to those occurring in an obesity quantitative trait locus, tabw2, identified in TH mice and found a missense polymorphism in the Cidec gene and characterized this variant’s effect on protein function. Conclusions We generated a complete catalog of variants in TH mice using the data from whole genome sequencing. Our findings will facilitate the identification of causal variants that underlie metabolic diseases in TH mice and will enable identification of candidate susceptibility genes for complex human obesity and type 2 diabetes. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-3245-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- James Denvir
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1700 3rd Ave. #435K BBSC, Huntington, WV, 25755, USA
| | - Goran Boskovic
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1700 3rd Ave. #435K BBSC, Huntington, WV, 25755, USA
| | - Jun Fan
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1700 3rd Ave. #435K BBSC, Huntington, WV, 25755, USA
| | - Donald A Primerano
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1700 3rd Ave. #435K BBSC, Huntington, WV, 25755, USA
| | - Jacaline K Parkman
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1700 3rd Ave. #435K BBSC, Huntington, WV, 25755, USA
| | - Jung Han Kim
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1700 3rd Ave. #435K BBSC, Huntington, WV, 25755, USA.
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Durousseau de Coulgeans C, Chiaroni J, Bailly P, Chapel-Fernandes S. Sequencing of the ART4 gene in sub-Saharan cohorts reveals ethnic differences and two new DO alleles: DO*B-Ile5Thr and DO*B-Trp266Arg. Transfusion 2015; 55:2376-83. [PMID: 25988428 DOI: 10.1111/trf.13153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 03/24/2015] [Accepted: 04/05/2015] [Indexed: 12/27/2022]
Abstract
BACKGROUND Given the high heterogeneity of sub-Saharan populations especially between nonpygmoids and pygmoids, differences are expected during investigation of the DO/ART4 gene. STUDY DESIGN AND METHODS Using genomic DNA extracted from blood samples collected from 77 Tswa pygmoids and 39 Teke and seven San nonpygmoids, DO coding regions were amplified and sequenced. A tetra-primer amplification refractory mutation system-polymerase chain reaction method was developed to specifically detect the DO*B-SH-Gln149Lys variant. Membrane expression of newly identified variant alleles in K562-transduced cells was studied by flow cytometry. RESULTS Extensive polymorphism was confirmed in Teke or San nonpygmoids and Tswa pygmoids with, respectively, 12, zero, and 24 DO*A; 54, 10, and 115 DO*B or DO*B-WL; five, zero, and 14 DO*HY; and six DO*JO alleles in Teke only. The DO*B-SH-Gln149Lys variant was observed as the third most frequent after the DO*HY and DO*JO alleles. Two novel DO*B alleles were identified in the San samples, that is, DO*B-Ile5Thr and DO*B-Trp266Arg. Study of K562-transduced cells showed that compared to the DO*B allele, DO*B-Ile5Thr was expressed more strongly while DO*B-Trp266Arg variant was expressed to a lesser extent and was not recognized by MIMA-123 monoclonal antibodies. CONCLUSION Sequencing analysis showed more allelic combinations in nonpygmoids than in pygmoids with high frequencies of DO*HY, DO*JO, and DO*B-SH-Gln149Lys variant alleles. This finding underlines the importance of including DO*HY and DO*JO single-nucleotide polymorphisms in genotyping tests to improve transfusion safety. Characterization of two novel DO*B alleles highlights the value of testing selected ethnic groups in understanding DO allele diversity.
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Affiliation(s)
| | - Jacques Chiaroni
- Etablissement Français du Sang Alpes Méditerranée.,UMR 7268 ADÉS Aix-Marseille Université-EFS-CNRS, Marseille, France
| | - Pascal Bailly
- Etablissement Français du Sang Alpes Méditerranée.,UMR 7268 ADÉS Aix-Marseille Université-EFS-CNRS, Marseille, France
| | - Sylvie Chapel-Fernandes
- Etablissement Français du Sang Alpes Méditerranée.,UMR 7268 ADÉS Aix-Marseille Université-EFS-CNRS, Marseille, France
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8
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Silencing and overexpression of human blood group antigens in transfusion: Paving the way for the next steps. Blood Rev 2015; 29:163-9. [DOI: 10.1016/j.blre.2014.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 10/23/2014] [Indexed: 01/25/2023]
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9
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de Coulgeans CD, Silvy M, Halverson G, Chiaroni J, Bailly P, Chapel-Fernandes S. Synonymous nucleotide polymorphisms influence Dombrock blood group protein expression in K562 cells. Br J Haematol 2013; 164:131-41. [PMID: 24125118 DOI: 10.1111/bjh.12597] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 08/28/2013] [Indexed: 11/27/2022]
Abstract
To gain further insight into ART4 (DO) gene alleles (DO*A, DO*JO1, DO*A-WL, DO*DOYA, DO*B, DO*B-WL, DO*B-SH-Q149K, DO*B-(WL)-I175N, DO*HY1, DO*HY2, DO*DOMR) and evaluate the impact of synonymous nucleotide polymorphisms on protein expression and mRNA accumulation of DO*A-HA, DO*A-SH and DO*B-SH alleles, human erythroleukaemic K562 cells were transducted with variant DO-lentiviral particles and analysed by flow cytometry and quantitative reverse transcription polymerase chain reaction. Monoclonal antibody (MoAb) detection of DO*A-HA and DO*JO1 transductants was lower than DO*A transductants, while detection of DO*A-SH, DO*A-WL and DO*DOYA transductants was higher. Variant DO*B alleles, i.e. DO*B-SH, DO*B-WL, DO*HY1, DO*HY2 and DO*DOMR, showed reduced MoAb binding. The unexpected modifications of protein expression of the DO*A-HA, DO*A-SH and DO*B-SH alleles that differ from the DO*A or DO*B alleles by a single synonymous polymorphism were abolished by reversion, thus implying involvement of these polymorphisms. Depending on the Leu208 codon used, detection level ranged from 1 to 4·14. In the variant alleles resulting from single synonymous polymorphism, mRNA accumulation correlated roughly with MoAbs detection levels, suggesting post-transcriptional regulation. Other than a few reports involving aberrant splicing, the experiments described herein provide the first evidence that synonymous nucleotide polymorphisms can influence Dombrock blood group expression. Such polymorphisms should be taken into account for molecular screening and potential impact on transfusion.
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Affiliation(s)
- Cécile Durousseau de Coulgeans
- Établissement Français du Sang Alpes Méditerranée, Marseille, France; EFS, ADÉS UMR 7268, Aix Marseille Université, Marseille, France
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Reid ME. Emily Cooley lecture 2012: Emily Cooley and techniques that have been applied to characterize DO and JR blood groups. Transfusion 2013; 53:1876-83. [PMID: 23581612 DOI: 10.1111/trf.12207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 02/25/2013] [Accepted: 02/25/2013] [Indexed: 11/29/2022]
Abstract
Emily Cooley was a well-respected medical technologist and morphologist with a remarkable skill set. She was highly regarded both professionally and personally. The "Emily Cooley Lectureship and Award" was established to honor her in particular and medical technologists in general. This article first reviews the history of the Emily Cooley award and provides some of the reasons why it carries her name. Then, using two blood group systems, DO and JR, it illustrates how many discoveries regarding blood groups were dependent on access to techniques.
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Affiliation(s)
- Marion E Reid
- Laboratory of Immunochemistry, New York Blood Center, New York, New York
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11
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Chapel-Fernandes S, Callebaut I, Halverson GR, Reid ME, Bailly P, Chiaroni J. Dombrock genotyping in a native Congolese cohort reveals two novel alleles. Transfusion 2011; 49:1661-71. [PMID: 19413734 DOI: 10.1111/j.1537-2995.2009.02193.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Since variant alleles in the Dombrock (DO) blood group system are common in Africans, DNA typing of DO alleles in an uninvestigated Congolese Teke ethnic group was performed. STUDY DESIGN AND METHODS DO exons were polymerase chain reaction amplified, using genomic DNA extracted from blood samples, and sequenced. Membrane expression in K562 cells transduced with DO-cDNAs using lentiviral vectors was studied by flow cytometry. Amino acid changes were mapped on the protein structure, predicted by homology modeling. RESULTS In 41 samples investigated, there were 56 DOB or DOB-WL (68%), 15 DOA (18%), 6 HY (7%), and 3 JO (4%) alleles. The remaining two alleles were novel, that is, DOB-SH-Gln149Lys carrying a 445C>A transversion and DOB-(WL)-Ile175Asn showing a 524T>A transversion on a DOB or DOB-WL background. Transduced K562 cells revealed that DOB-SHGln149Lys variant was expressed to the same extent as DOB-SH but to a lesser extent than the DOB control. The DOB-Ile175Asn variant shows equivalent expression to DOB but is not recognized by monoclonal antibodies MIMA-53. As deduced from the protein model, these missense changes would lead to structure similar to the wild-type one, with only modified surface features. CONCLUSION Molecular screening of Teke individuals revealed a high frequency of HY and JO alleles and two novel alleles, one on the DOB (or DOB-WL) and one on the DOB-SH background. Expression studies highlighted the impact of changes on Do protein expression. These findings suggest that allelic diversity is greater than expected and that expression level of DO alleles should be taken into account in transfusion
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Affiliation(s)
- Sylvie Chapel-Fernandes
- Laboratoire d’Hématologie Moléculaire, EFS Alpes Méditerranée, UMR 6578, Université de la Méditerranée, 207 Boulevard Sainte Marguerite, 13009, Marseille, France
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Mayer B, Thornton N, Yürek S, Wylie D, Hue-Roye K, Poole J, Bartolmäs T, Salama A, Lomas-Francis C, Velliquette RW, Yazdanbakhsh K, Reid ME. New antigen in the Dombrock blood group system, DOYA, ablates expression of Doa and weakens expression of Hy, Joa, and Gya antigens. Transfusion 2010; 50:1295-302. [DOI: 10.1111/j.1537-2995.2009.02560.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Basal and inducible expression of the thiol-sensitive ART2.1 ecto-ADP-ribosyltransferase in myeloid and lymphoid leukocytes. Purinergic Signal 2009; 5:369-83. [PMID: 19404775 DOI: 10.1007/s11302-009-9162-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Accepted: 04/15/2009] [Indexed: 10/20/2022] Open
Abstract
ADP-ribosylation of cell surface proteins in mammalian cells is a post-translational modification by which ecto-ADP-ribosyltransferases (ARTs) transfer ADP-ribose from extracellular NAD to protein targets. The ART2 locus at murine chromosome 7 encompasses the tandem Art2a and Art2b genes that encode the distinct ART2.1 and ART2.2 proteins. Although both ecto-enzymes share 80% sequence identity, ART2.1 activity is uniquely regulated by an allosteric disulfide bond that is reducible in the presence of extracellular thiols, such as cysteine and glutathione, that accumulate in hypoxic and ischemic tissues. Previous studies have characterized the expression of ART2.1 and ART2.2 in murine T lymphocytes but not in other major classes of lymphoid and myeloid leukocytes. Here, we describe the expression of ART2.1 activity in a wide range of freshly isolated or tissue-cultured murine myeloid and lymphoid leukocytes. Spleen-derived macrophages, dendritic cells (DC), and B cells constitutively express ART2.1 as their predominant ART while spleen T cells express both ART2.1 and the thiol-independent ART2.2 isoform. Although bone-marrow-derived macrophages (BMDM) and dendritic cells (BMDC) constitutively express ART2.1 at low levels, it is markedly up-regulated when these cells are stimulated in vitro with IFNbeta or IFNgamma. ART2.1 expression and activity in splenic B cells is modestly up-regulated during incubation in vitro for 24 h, a condition that promotes B cell apoptosis. This increase in ART2.1 is attenuated by IL-4 (a B cell survival factor), but is not affected by IFNbeta/gamma, suggesting a possible induction of ART2.1 as an ancillary response to B cell apoptosis. In contrast, ART2.1 and ART2.2, which are highly expressed in freshly isolated splenic T cells, are markedly down-regulated when purified T cells are incubated in vitro for 12-24 h. Studies with the BW5147 mouse thymocyte line verified basal expression of ART2.1 and ART2.2, as in primary spleen T cells, and demonstrated that both isoforms can be up-regulated when T cells are maintained in the presence of IFNs. Comparison of the surface proteins which are ADP-ribosylated by ART2.1 in the different leukocyte subtypes indicated both shared and cell-specific proteins as ART2.1 substrates. The LFA-1 integrin, a major target for ART2.2 in T cells, is also ADP-ribosylated by the ART2.1 expressed in macrophages. Thus, ART2.1, in contrast to ART2.2, is expressed in a broad range of myeloid and lymphoid leukocytes. The thiol redox-sensitive nature of this ecto-enzyme suggests an involvement in purinergic signaling that occurs in the combined context of inflammation and hypoxia/ischemia.
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Westhoff C, Vege S, Yazdanbakhsh K, Wylie D, Razib M, Hue-Roye K, Halverson G, Read S, Whiteoak E, Nickle P, Maurer J, Kavitsky D, Nance S, Reid ME. A DOB allele encoding an amino acid substitution (Phe62Ser) resulting in a Dombrock null phenotype. Transfusion 2007; 47:1356-62. [PMID: 17655578 DOI: 10.1111/j.1537-2995.2007.01279.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The gene polymorphisms responsible for the antigens Doa, Dob, Hy, and Joa in the Dombrock (Do) blood group system have been identified. Four different mutations have been reported to cause the Dombrock null [Gy(a-)] phenotype. These include splice mutations, an eight-nucleotide deletion, and insertion of a stop codon. Here a Dombrock null caused by a single-amino-acid substitution in the full-length protein is reported. STUDY DESIGN AND METHODS DOA and DOB were determined by polymerase chain reaction-restriction fragment length polymorphism, and DO (ART4) exons and flanking regions were sequenced from genomic DNA. Expression analysis was performed by transfection of wild-type and mutant cDNAs into HEK 293T cells followed by flow cytometry and immunoblotting. Homology modeling was used to map the mutation on the protein structure. RESULTS The patient's sample carried nt 793G/G, indicating a DOB/DOB background. Exon 2 sequencing showed the sample carried a new mutation, nt 185T>C, causing a Phe62Ser substitution. This variant Do was not expressed on the surface of transfected HEK 293T cells. The mutation maps to a highly conserved FDDQY motif located between the beta1-strand and alpha1-helix near the COOH terminus in the native molecule. CONCLUSIONS The Dombrock null reported here is due to a single Phe62Ser mutation. The expression data confirmed that 62Ser is responsible for lack of cell surface Do, and protein modeling suggests the mutation disrupts important aromatic side chain interactions between Phe62 and His160. Production of an antibody to a high prevalence Dombrock antigen (anti-Gya) in this patient was consistent with complete absence of Dombrock/ART4 protein.
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16
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Haag F, Adriouch S, Braß A, Jung C, Möller S, Scheuplein F, Bannas P, Seman M, Koch-Nolte F. Extracellular NAD and ATP: Partners in immune cell modulation. Purinergic Signal 2007; 3:71-81. [PMID: 18404420 PMCID: PMC2096762 DOI: 10.1007/s11302-006-9038-7] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Accepted: 10/22/2006] [Indexed: 11/30/2022] Open
Abstract
Extracellular NAD and ATP exert multiple, partially overlapping effects on immune cells. Catabolism of both nucleotides by extracellular enzymes keeps extracellular concentrations low under steady-state conditions and generates metabolites that are themselves signal transducers. ATP and its metabolites signal through purinergic P2 and P1 receptors, whereas extracellular NAD exerts its effects by serving as a substrate for ADP-ribosyltransferases (ARTs) and NAD glycohydrolases/ADPR cyclases like CD38 and CD157. Both nucleotides activate the P2X7 purinoceptor, although by different mechanisms and with different characteristics. While ATP activates P2X7 directly as a soluble ligand, activation via NAD occurs by ART-dependent ADP-ribosylation of cell surface proteins, providing an immobilised ligand. P2X7 activation by either route leads to phosphatidylserine exposure, shedding of CD62L, and ultimately to cell death. Activation by ATP requires high micromolar concentrations of nucleotide and is readily reversible, whereas NAD-dependent stimulation begins at low micromolar concentrations and is more stable. Under conditions of cell stress or inflammation, ATP and NAD are released into the extracellular space from intracellular stores by lytic and non-lytic mechanisms, and may serve as ‘danger signals–to alert the immune response to tissue damage. Since ART expression is limited to naïve/resting T cells, P2X7-mediated NAD-induced cell death (NICD) specifically targets this cell population. In inflamed tissue, NICD may inhibit bystander activation of unprimed T cells, reducing the risk of autoimmunity. In draining lymph nodes, NICD may eliminate regulatory T cells or provide space for the preferential expansion of primed cells, and thus help to augment an immune response.
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Affiliation(s)
- Friedrich Haag
- Institute of Immunology, University Hospital, Martinistr. 52, 20246, Hamburg, Germany,
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Deigendesch N, Koch-Nolte F, Rothenburg S. ZBP1 subcellular localization and association with stress granules is controlled by its Z-DNA binding domains. Nucleic Acids Res 2006; 34:5007-20. [PMID: 16990255 PMCID: PMC1636418 DOI: 10.1093/nar/gkl575] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Z-DNA binding protein 1 (ZBP1) belongs to a family of proteins that contain the Zα domain, which binds specifically to left-handed Z-DNA and Z-RNA. Like all vertebrate proteins in the Zα family, it contains two Zα-like domains and is highly inducible by immunostimulation. Using circular dichroism spectroscopy and electrophoretic mobility shift assays we show that both Zα domains can bind Z-DNA independently and that substrate binding is greatly enhanced when both domains are linked. Full length ZBP1 and a prominent splice variant lacking the first Zα domain (ΔZα) showed strikingly different subcellular localizations. While the full length protein showed a finely punctate cytoplasmatic distribution, ZBP1ΔZα accumulated in large cytoplasmic granules. Mutation of residues important for Z-DNA binding in the first Zα domain resulted in a distribution comparable to that of ZBP1ΔZα. The ZBP1ΔZα granules are distinct from stress granules (SGs) and processing bodies but dynamically interacted with these. Polysome stabilization led to the disassembly of ZBP1ΔZα granules, indicating that mRNA are integral components. Heat shock and arsenite exposure had opposing effects on ZBP1 isoforms: while ZBP1ΔZα granules disassembled, full length ZBP1 accumulated in SGs. Our data link ZBP1 to mRNA sorting and metabolism and indicate distinct roles for ZBP1 isoforms.
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Affiliation(s)
- Nikolaus Deigendesch
- Institute for Immunology, University Hospital EppendorfHamburg, Germany
- Department of Biology, Massachusetts Institute of TechnologyCambridge, MA, USA
| | | | - Stefan Rothenburg
- Institute for Immunology, University Hospital EppendorfHamburg, Germany
- To whom correspondence should be addressed. Tel: +49 40 428037922; Fax: +49 40 428034243;
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Koch-Nolte F, Adriouch S, Bannas P, Krebs C, Scheuplein F, Seman M, Haag F. ADP-ribosylation of membrane proteins: unveiling the secrets of a crucial regulatory mechanism in mammalian cells. Ann Med 2006; 38:188-99. [PMID: 16720433 DOI: 10.1080/07853890600655499] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Many bacterial toxins kill animal cells by adenosine diphosphate (ADP)-ribosylating intracellular target proteins. Mammalian cells express toxin-related cell surface ADP-ribosyltransferases (ARTs) that transfer ADP-ribose from nicotinamide adenine dinucleotide (NAD) onto arginine residues of other membrane proteins. The association of these glycosylphosphatidylinositol (GPI)-anchored ectoenzymes with glycolipid rafts focuses them onto components of the signal transduction machinery. Exposing murine T cells to NAD, the ART substrate, induces a cascade of reactions that culminates in cell death by apoptosis. This mechanism, dubbed 'NAD-induced cell death' or NICD, is initiated when ART2 ADP-ribosylates the cytolytic P2X7 purinergic receptor, inducing formation of a cation channel, opening of a nonselective pore, shedding of CD62L from the cell surface, exposure of phosphatidylserine on the outer leaflet of the plasma membrane, breakdown of the mitochondrial membrane potential, and DNA-fragmentation. The ART substrate NAD is produced in large amounts inside the cell and can be released from damaged cells during inflammation and tissue injury. In the extracellular environment, the signaling function of NAD is terminated by NAD-degrading ectoenzymes such as CD38. We propose that ART2-catalyzed ADP-ribosylation of P2X7 represents the paradigm of a regulatory mechanism by which ART-expressing cells can sense and respond to the release of NAD from damaged cells.
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Affiliation(s)
- Friedrich Koch-Nolte
- Institute of Immunology, Department of Clinical Pathology, University Hospital, Hamburg, Germany.
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