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Red blood cell blood group antigen

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https://www.readbyqxmd.com/read/28718464/-dissertation-25-years-after-date-48-the-effect-of-saliva-on-the-colonisation-of-oral-bacteria
#1
A J M Ligtenberg
In the research that formed the basis of the dissertation 'Intervention of saliva in the colonization process of oral bacteria' from 1992, the aggregation or clustering of oral bacteria by saliva was investigated. This prevents bacterial colonisation in the mouth. Major individual differences in aggregation activity of different saliva samples were found to exist, partly determined by the blood group of the saliva donor. As well as being found in red blood cells, AB0 blood group antigens also appear on salivary glycoproteins...
July 2017: Nederlands Tijdschrift Voor Tandheelkunde
https://www.readbyqxmd.com/read/28717357/high-levels-of-cxcl8-and-low-levels-of-cxcl9-and-cxcl10-in-women-with-maternal-rhd-alloimmunization
#2
Juliana Araújo de Carvalho Schettini, Thomás Virgílio Gomes, Alexandra Karla Santos Barreto, Claudeir Dias da Silva Júnior, Marina da Matta, Isabela Cristina Neiva Coutinho, Maria do Carmo Valgueiro Costa de Oliveira, Leuridan Cavalcante Torres
Maternal RhD alloimmunization is an inflammatory response against protein antigens in fetal red blood cells (RBC). However, not all women become alloimmunized when exposed to RhD(+) fetal RBC. Thus, this study aimed to evaluate levels of inflammatory chemokines in RhD(-) pregnant women with erythrocyte alloimmunization. CXCL8, CXCL9, CCL5, and CXCL10 levels were determined from cell culture supernatants by flow cytometry in 46 (30 non-alloimmunized RhD(-) and 16 previously alloimmunized RhD(-)) pregnant women...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28680086/host-age-and-expression-of-genes-involved-in-red-blood-cell-invasion-in-plasmodium-falciparum-field-isolates
#3
Aida Valmaseda, Quique Bassat, Pedro Aide, Pau Cisteró, Alfons Jiménez, Aina Casellas, Sonia Machevo, Ruth Aguilar, Betuel Sigaúque, Virander S Chauhan, Christine Langer, James Beeson, Chetan Chitnis, Pedro L Alonso, Deepak Gaur, Alfredo Mayor
Plasmodium falciparum proteins involved in erythrocyte invasion are main targets of acquired immunity and important vaccine candidates. We hypothesized that anti-parasite immunity acquired upon exposure would limit invasion-related gene (IRG) expression and affect the clinical impact of the infection. 11 IRG transcript levels were measured in P. falciparum isolates by RT-PCR, and IgG/IgM against invasion ligands by Luminex®, in 50 Mozambican adults, 25 children with severe malaria (SM) and 25 with uncomplicated malaria (UM)...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28679662/measuring-the-plasmodium-falciparum-hrp2-protein-in-blood-from-artesunate-treated-malaria-patients-predicts-post-artesunate-delayed-hemolysis
#4
Papa Alioune Ndour, Sébastien Larréché, Oussama Mouri, Nicolas Argy, Frédérick Gay, Camille Roussel, Stéphane Jauréguiberry, Claire Perillaud, Dominique Langui, Sylvestre Biligui, Nathalie Chartrel, Audrey Mérens, Eric Kendjo, Aniruddha Ghose, Md Mahtab Uddin Hassan, Md Amir Hossain, Hugh W F Kingston, Katherine Plewes, Arjen M Dondorp, Martin Danis, Sandrine Houzé, Serge Bonnefoy, Marc Thellier, Charles J Woodrow, Pierre A Buffet
Artesunate, the recommended drug for severe malaria, rapidly clears the malaria parasite from infected patients but frequently induces anemia-called post-artesunate delayed hemolysis (PADH)-for which a simple predictive test is urgently needed. The underlying event in PADH is the expulsion of artesunate-exposed parasites from their host erythrocytes by pitting. We show that the histidine-rich protein 2 (HRP2) of the malaria parasite Plasmodium falciparum persists in the circulation of artesunate-treated malaria patients in Bangladesh and in French travelers who became infected with malaria in Africa...
July 5, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28669524/from-genetic-variability-to-phenotypic-expression-of-blood-group-systems
#5
L Raud, C Férec, Y Fichou
More than 300 red blood cell (RBC) antigens belonging to 36 blood group systems have been officially reported in humans by the International Society of Blood Transfusion (ISBT). Phenotypic variability is directly linked to the expression of the 41 blood group genes. The Rh blood group system, which is composed of 54 antigens, is the most complex and polymorphic system. Many rare genetic variants within the RH (RHD and RHCE) genes, involving various mutational mechanisms (single-nucleotide substitutions, short insertions/deletions, rearrangements, large deletions), have been reported in the literature and reference databases...
June 29, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28664822/passenger-lymphocyte-syndrome-in-the-abo-incompatible-kidney-transplant-recipient-receiving-rituximab
#6
Shunji Nishide, Junji Uchida, Kazuya Kabei, Tomoaki Iwai, Nobuyuki Kuwabara, Toshihide Naganuma, Norihiko Kumada, Yoshiaki Takemoto, Tatsuya Nakatani
Passenger lymphocyte syndrome is a rare but important disease in which the donor lymphocytes produce antibodies to the red blood cell antigens of the recipient, causing alloimmune hemolysis. It occurs in ABO blood group-mismatched solid-organ and/or bone marrow transplant. We report a case of passenger lymphocyte syndrome occurring after ABO-incompatible kidney transplant. The recipient received rituximab as a desensitization protocol. On posttransplant day 18, the recipient showed a fall in her hemoglobin levels without identifiable bleeding source and an elevation of total bilirubin...
June 28, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28657767/recognizing-and-resolving-abo-discrepancies
#7
Geralyn M Meny
Patient samples are routinely typed for ABO prior to transfusion. Determining the ABO group requires both red blood cell (RBC) antigen typing for A and B (forward type) and testing for anti-A and anti-B in the plasma (reverse type). An ABO discrepancy exists when the result of an ABO RBC typing, or forward type, does not agree with the result of the plasma typing, or reverse type. This brief review examines several causes of ABO discrepancies encountered in the clinical transfusion service. Options for resolving these discrepancies are presented, including a discussion of which discrepancies should be resolved using molecular testing...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657766/a-suspected-delayed-hemolytic-transfusion-reaction-mediated-by-anti-joa
#8
Ryan P Jajosky, Wendy C Lumm, Scott C Wise, Roni J Bollag, James F Shikle
A 32-year-old African-American woman with a history of sickle cell disease presented for surgical evaluation of left total hip arthroplasty due to avascular necrosis of the femoral head. In anticipation of a complex orthopedic procedure, pre-surgical blood work was ordered. The patient's Fenwal blood sample typed as group O, D+. Although the patient had a history of anti-Fya, the antibody identification was inconclusive, so the workup was sent to a reference laboratory. The patient was last transfused with red blood cells (RBCs) 2 years earlier, but had no history of transfusion reactions...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657765/the-fors-awakens-review-of-a-blood-group-system-reborn
#9
Annika K Hult, Martin L Olsson
The presence of the FORS1 antigen on red blood cells was discovered relatively recently, and in 2012, the International Society of Blood Transfusion (ISBT) acknowledged FORS as blood group system number 031. This rare antigen is carried by a glycosphingolipid and formed by elongation of the P antigen. Most people have naturally occurring anti-FORS1 in their plasma. The clinical significance of these antibodies is unknown in the transfusion setting, but they can hemolyze FORS1+ erythrocytes in the presence of complement in vitro...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28657763/the-vel-blood-group-system-a-review
#10
Jill R Storry, Thierry Peyrard
The blood group antigen Vel has been one of immunohematology's greatest enigmas: the variation in antigen strength from one individual to another, the property of anti-Vel to readily hemolyze Vel+ red blood cells (RBCs), and the difficulty to screen for sufficient numbers of Vel- blood donors had made Vel a tough nut to crack. In 2013, a small, previously unknown protein called small integral membrane protein 1 (SMIM1) was identified on the RBC by three independent research groups using different approaches, and all three groups demonstrated that Vel- RBCs lacked SMIM1...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28653406/an-exonic-missense-mutation-c-28g-a-is-associated-with-weak-b-blood-group-by-affecting-rna-splicing-of-the-abo-gene
#11
Xiaohong Cai, Chengrui Qian, Wenman Wu, Hang Lei, Qiulan Ding, Wei Zou, Dong Xiang, Xuefeng Wang
BACKGROUND: The amino acid substitutions caused by ABO gene mutations are usually predicted to impact glycosyltransferase's function or its biosynthesis. Here we report an ABO exonic missense mutation that affects B-antigen expression by decreasing the mRNA level of the ABO gene rather than the amino acid change. STUDY DESIGN AND METHODS: Serologic studies including plasma total GTB transfer capacity were performed. The exon sequences of the ABO gene were analyzed by Sanger sequencing...
June 26, 2017: Transfusion
https://www.readbyqxmd.com/read/28653329/acquired-rhd-mosaicism-identifies-fibrotic-transformation-of-thrombopoietin-receptor-mutated-essential-thrombocythemia
#12
Celina Montemayor-Garcia, Rebecca Coward, Maher Albitar, Rupa Udani, Prachi Jain, Eleftheria Koklanaris, Minoo Battiwalla, Siobán Keel, Harvey G Klein, A John Barrett, Sawa Ito
BACKGROUND: Acquired copy-neutral loss of heterozygosity has been described in myeloid malignant progression with an otherwise normal karyotype. CASE REPORT: A 65-year-old woman with MPL-mutated essential thrombocythemia and progression to myelofibrosis was noted upon routine pretransplant testing to have mixed field reactivity with anti-D and an historic discrepancy in RhD type. The patient had never received transfusions or transplantation. RESULTS: Gel immunoagglutination revealed group A red blood cells and a mixed-field reaction for the D phenotype, with a predominant D-negative population and a small subset of circulating red blood cells carrying the D antigen...
June 26, 2017: Transfusion
https://www.readbyqxmd.com/read/28651884/-transfusions-in-myelodysplastic-syndromes
#13
C Rose
PRBC transfusion remains the mainstay of treatment of anemia in MDS after failure of erythropoiesis stimulating agents. The most common transfusion trigger in transfusion-dependent MDS patients is 80g/L. This level is based only on expert consensus; a randomized controlled trial comparing restrictive against liberal policy is required to evaluate potential impact of transfusion policy on with QoL and survival. Prophylactic antigen matching for RhCE and K must be used in order to reduce the risk of red blood cell (RBC) alloimmunization...
June 23, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28624811/altered-erythropoiesis-and-decreased-number-of-erythrocytes-in-children-with-neuroblastoma
#14
Fabio Morandi, Sebastiano Barco, Sara Stigliani, Michela Croce, Luca Persico, Corrado Lagazio, Francesca Scuderi, Maria Luisa Belli, Mariapina Montera, Giuliana Cangemi, Sarah Pozzi, Valentina Rigo, Paola Scaruffi, Loredana Amoroso, Giovanni Erminio, Vito Pistoia, Silvano Ferrini, Maria Valeria Corrias
Neuroblastoma (NB) is a pediatric tumor presenting at diagnosis either as localized or metastatic disease, which mainly involves the bone marrow (BM). The physical occupancy of BM space by metastatic NB cells has been held responsible for impairment of BM function. Here, we investigated whether localized or metastatic NB may alter hematopoietic lineages' maturation and release of mature cells in the periphery, through gene expression profiling, analysis of BM smears, cell blood count and flow cytometry analysis...
May 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28605139/clinical-implications-of-pretreatment-inflammatory-biomarkers-as-independent-prognostic-indicators-in-prostate-cancer
#15
Zhaohui Sun, Ying Ju, Fuyan Han, Xiya Sun, Fang Wang
OBJECTIVES: Research on the relationship between inflammatory biomarkers and malignant tumors has become a hotspot. Many studies have demonstrated that neutrophil-lymphocyte ratio (NLR), platelet-lymphocyte ratio (PLR), and red blood cell distribution width (RDW) could act as independent prognostic indicators for several solid tumors. This study aimed to evaluate the clinical implications of pretreatment inflammatory biomarkers, including NLR, PLR, and RDW as independent prognostic indicators in prostate cancer (PCa)...
June 12, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28604970/-study-of-the-molecular-basis-for-an-individual-with-bel-variant-due-to-deletion-of-b-glycosyltransferase-gene
#16
Yanling Ying, Xiaozhen Hong, Shu Chen, Xianguo Xu, Kairong Ma, Xiaofei Lan, Ji He, Faming Zhu
OBJECTIVE: To explore the molecular basis of an individual with Bel variant of the ABO blood group. METHODS: The ABO antigen and serum antibody of the individual were detected by serological method. All coding regions and flanking introns of the ABO gene were amplified with PCR and sequenced bidirectionally. The haplotypes of the individual were analyzed by cloning and sequencing. A three dimensional model of the mutant protein was constructed and analyzed. RESULTS: The individual has expressed a very weak B antigen on its red blood cells by absorption and elution testing, which was identified as a Bel variant phenotype...
June 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28598127/-correlations-between-aml1-eto-fusion-gene-and-clinical-features-of-acute-myeloid-leukemia-in-sichuan
#17
Xue-Mei Wang, Yuan-Xin Ye, Lian Yang, Xiao-Jun Lu, Bin-Wu Ying
OBJECTIVES: To determine the correlations between AML1-ETO fusion gene and clinical characteristics of patients with AML,and its association with the prognosis of AML-M2. METHODS: Medical records of 94 AML-M2 cases with positive AML1-ETO fusion gene and 51 AML-M2 cases with negative AML1-ETO gene were retrospective reviewed.Their clinical characteristics,treatment responses and prognostic outcomes were compared. RESULTS: No significant differences in the clinical symptoms,predominantly anemia,fever and hemorrhage,were found between the AML1-ETO fusion gene positive and negative AML-M2 (P>0...
November 2016: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28596661/what-is-it-really-anti-g-or-anti-d-plus-anti-c-clinical-significance-in-antenatal-mothers
#18
Soumya Das, Shamee Shastry, M Murugesan, Poornima Baliga B, Shamee Shastry
G antigen of Rh blood group system is present either along with D and/or C positive red cells. Hence, [serologically anti-G presents with the similar picture as that of multiple antibodies (anti-D + anti-C). Differentiating them is important as anti-D + anti-C causes severe hemolytic disease of the fetus and newborn than anti-G. In pregnancies with anti-G alone, alloimmunization due to D antigen could be prevented by prophylactic administration of RhIg. Differentiating between anti-D + C from anti-G in alloimmunized pregnant mothers becomes essential...
June 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/28576386/-identification-of-alloantibodies-and-their-associations-balance-sheet-of-3%C3%A2-years-at-the-regional-center-of-blood-transfusion-in-rabat-morocco-and-difficult-in-transfusion-management
#19
S Achargui, A Zidouh, S Abirou, F Z Merhfour, S Monsif, S Amahrouch, A El Ghobre, M El Halhali, H Temmara, A El Hryfy, M Motqi, A Satty, M Kandili, M Aghri, K Hajjout, M Benajiba
Red blood cell immunization can lead to delays or even an impasse in a transfusion. OBJECTIVES: Determine the specificities of the most common of alloantibodies and their associations to correct management of red blood cell transfused. METHODS AND MATERIALS: A retrospective study between 2013 and 2015 in immunohematology laboratories at the Blood Transfusion Center of Rabat in Morocco. The following data were studied: frequency, specificities of alloantibodies, blood group involved in alloimmunization and difficult of management of transfusion in case with association of alloantibodies...
May 30, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28535394/red-blood-cell-alloimmunization-in-184-patients-with-myeloid-neoplasms-treated-with-azacitidine-a-retrospective-single-center-experience
#20
M Leisch, L Weiss, N Lindlbauer, C Jungbauer, A Egle, E Rohde, R Greil, C Grabmer, L Pleyer
Alloimmunization to Red Blood Cell (RBC) antigens frequently occurs in patients with myeloid neoplasms (AML, MDS and CMML) and potentially poses the patient at risk for delayed hemolytic transfusion reactions and limited supply of compatible RBC-units. However, there is comparatively little data on transfusion associated characteristics in this patient cohort. We therefore retrospectively analyzed transfusion requirements and clinical outcomes of 184 patients with myloid neoplasms treated with azacitidine at the Paracelsus Medical University Salzburg, which were included in the Austrian Registry of Hypomethylating Agents...
May 9, 2017: Leukemia Research
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