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Alloimmunity

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https://www.readbyqxmd.com/read/28205236/trends-in-us-minority-red-blood-cell-unit-donations
#1
Mark H Yazer, Meghan Delaney, Marc Germain, Matthew S Karafin, Merlyn Sayers, Ralph Vassallo, Alyssa Ziman, Beth Shaz
BACKGROUND: To provide the appropriately diverse blood supply necessary to support alloimmunized and chronically transfused patients, minority donation recruitment programs have been implemented. This study investigated temporal changes in minority red blood cell (RBC) donation patterns in the United States. STUDY DESIGN AND METHODS: Data on donor race and ethnicity from 2006 through 2015, including the number of unique donors, collections, RBCs successfully donated, and average annual number of RBC donations per donor (donor fraction), were collected from eight US blood collectors...
February 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28191636/cancer-type-predicts-alloimmunization-following-rhd-incompatible-rbc-transfusions
#2
Komal Arora, James Kelley, Dawen Sui, Jing Ning, Fernando Martinez, Benjamin Lichtiger, Ashok Tholpady
BACKGROUND: Immunosuppressed, RhD-negative oncology patients tend to have lower rates of sensitization to the D antigen when they receive transfusion with RhD-positive blood components. Clinical factors associated with alloimmunization to the D antigen in RhD-negative oncology patients when they receive transfusion with RhD-positive red blood cells (RBCs) have not been well defined. STUDY DESIGN AND METHODS: This was a 4-year, retrospective analysis identifying RhD-negative oncology patients who received RhD-positive RBCs and were not previously alloimmunized to the D antigen...
February 12, 2017: Transfusion
https://www.readbyqxmd.com/read/28191475/the-potential-of-micrornas-as-novel-biomarkers-for-transplant-rejection
#3
REVIEW
Matthias Hamdorf, Satoru Kawakita, Matthew Everly
The control of gene expression by microRNAs (miRNAs, miR) influences many cellular functions, including cellular differentiation, cell proliferation, cell development, and functional regulation of the immune system. Recently, miRNAs have been detected in serum, plasma, and urine and circulating miR profiles have been associated with a variety of diseases. Rejection is one of the major causes of allograft failure and preventing and treating acute rejection are the central task for clinicians working with transplant patients...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28185828/the-role-of-molecular-typing-and-perfect-match-transfusion-in-sickle-cell-disease-and-thalassaemia-an-innovative-transfusion-strategy
#4
Rossana Putzulu, Nicola Piccirillo, Nicoletta Orlando, Giuseppina Massini, Maddalena Maresca, Fernando Scavone, Bianca Maria Ricerca, Gina Zini
Chronic red blood cell transfusions remain an essential part of supportive treatment in patients with thalassaemia and sickle cell disease (SCD). Red blood cell (RBC) transfusions expose patients to the risk of developing antibodies: RBC alloimmunization occurs when the immune system meets foreign antigens. We created a register of extensively genotyped donors to achieve a better matched transfusion in order to reduce transfusion alloimmunization. Extended RBC antigen typing was determined and confirmed by molecular biology techniques using Human Erythrocyte Antigen (HEA) BeadChip (BioArray Solutions Ltd...
January 23, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28180200/acoustic-radiation-force-impulse-elastosonography-of-placenta-in-maternal-red-blood-cell-alloimmunization-a-preliminary-and-descriptive-study
#5
Orkun Cetin, Erbil Karaman, Harun Arslan, Ibrahim Akbudak, Recep Yıldızhan, Ali Kolusarı
AIMS: Maternal red blood cell alloimmunization is an important cause of fetal morbidity and mortality in the perinatal period, despite well-organized prophylaxis programs. The objective of the study was to evaluate placental elasticity by using Acoustic Radiation Force Impulse (ARFI) in Rhesus (Rh) alloimmunized pregnant women with hydropic and nonhydropic fetuses and to compare those with healthy pregnant women. MATERIAL AND METHODS: This case-control and descriptive study comprised twenty-eight healthy pregnant women, 14 Rh alloimmunized pregnant women with nonhydropic fetuses, and 16 Rh alloimmunized pregnant women with hydropic fetuses in the third trimester of pregnancy...
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28164680/periomphalitis-with-delayed-umbilical-cord-separation-due-to-alloimmune-neonatal-neutropenia
#6
Tomohiro Sameshima, Sota Iwatani, Sachiyo Fukushima, Mariko Taniguchi-Ikeda, Makoto Hashimoto, Kimiko Yurugi, Kazumoto Iijima, Ichiro Morioka
In a preterm infant, small-for-gestational age, neutropenia persisted from the birth, and periomphalitis symptoms appeared at 23 days of age. Upon administration of granulocyte colony-stimulating factor, the neutrophil count increased, and periomphalitis was recovered. At the same time, the umbilical cord separated at 44 days of age. The human neutrophil antigen (HNA) of the infant was 1a/1b, and antineutrophil antibody for HNA-1b was present in both serums of the mother and the infant at birth, indicating a diagnosis of alloimmune neutropenia...
November 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164668/development-of-a-multiplex-pcr-for-human-neutrophil-antigens-1-3-4-and-5-genotyping-among-thai-blood-donors
#7
Oytip Nathalang, Kamphon Intharanut, Kanokpol Siriphanthong, Wiradee Sasikarn, Siriporn Nathalang
BACKGROUND: Different polymerase chain reaction (PCR) techniques for human neutrophil antigens (HNA) genotyping have been implemented to diagnose the clinical conditions of patients with alloimmune neutropenia, febrile non-hemolytic transfusion reactions, and transfusion-related acute lung injury and to provide effective HNAmatched granulocyte transfusions. The present study aimed to develop an in-house multiplex-PCR for HNA-1, -3, -4, and -5 genotyping in the Thai population. METHODS: Altogether, 500 DNA samples obtained from unrelated, healthy Thai blood donors at the National Blood Centre, Thai Red Cross Society, Bangkok, Thailand were included...
November 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164536/development-of-real-time-pcr-and-melting-curve-analysis-for-the-rapid-detection-of-del-with-rhd-c-1222t-c-or-rhd-c-1227g-a
#8
Yun Ji Hong, Hyungsuk Kim, Eun Young Song, Duck Cho, Kyoung Un Park, Kyou-Sup Han
BACKGROUND: DEL, a variant of RhD, is difficult to detect in routine blood bank testing owing to its extremely low levels of D antigen expression. However, DEL is capable of alloimmunizing a patient when transfused into RhDnegative individuals. METHODS: In this study, we developed real-time PCR and melting curve analysis for the rapid detection of the DEL phenotype. RESULTS: Of the 325 serologically RhD-negative individuals involved in the study, 56 (17...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164304/blood-group-antigen-matching-influence-on-gestational-outcomes-amigo-study
#9
Meghan Delaney, Agneta Wikman, Leo van de Watering, Henk Schonewille, Jennie P Verdoes, Stephen P Emery, Michael F Murphy, Julie Staves, Susanne Flach, Donald M Arnold, Richard M Kaufman, Alyssa Ziman, Sarah K Harm, Mark Fung, Catherine S Eppes, Nancy M Dunbar, Andreas Buser, Erin Meyer, Helen Savoia, Padmakumari Abeysinghe, Nancy Heddle, Alan Tinmouth, Aicha N Traore, Mark H Yazer
BACKGROUND: Red blood cell (RBC) antigen matching policies to prevent alloimmunization in females of childbearing potential (FCP) vary between centers. To inform transfusion centers responsible for making decisions about matching policies for FCPs, the causal stimulus of the antibodies implicated in severe hemolytic disease of the fetus and newborn (HDFN) must be determined. STUDY DESIGN AND METHODS: We conducted a multinational retrospective study of women with offspring affected by severe HDFN requiring neonatal exchange transfusion and/or intrauterine transfusion...
February 5, 2017: Transfusion
https://www.readbyqxmd.com/read/28164136/the-role-of-humoral-alloreactivity-in-liver-transplantation-lessons-learned-and-new-perspectives
#10
REVIEW
Elaine Y Cheng
More than ten years after the initial description of the humoral theory of transplantation by Dr. Paul I. Terasaki, the significance of humoral alloimmunity in liver transplantation has yet to be clearly defined. The liver allograft has an inherent tolerogenic capacity which confers its resistance to cell-mediated as well as antibody-mediated rejection. Nevertheless, the protection against alloimmunity is not complete, and antibody-mediated tissue injury can occur in the liver graft under specific circumstances...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28153825/tissue-tolerance-a-distinct-concept-to-control-acute-gvhd-severity
#11
Shin-Rong Wu, Pavan Reddy
Target tissue damage occurs as a consequence of pathological immune responses following allogeneic stem cell transplantation resulting in acute graft-versus-host disease (GVHD). Among those who study infections in plants, it is well recognized that tissues play a distinct role from the immune system in mediating disease severity. Recently, this has also been appreciated in mammals. However, the severity of immunopathology in the context of alloimmune diseases such as acute GVHD has been mainly understood and managed by direct targeting of immune cells to generate immune tolerance...
February 2, 2017: Blood
https://www.readbyqxmd.com/read/28145996/severe-transplantation-mediated-alloimmune-thrombocytopenia-in-2-recipients-of-organs-from-the-same-donor
#12
Isabella V Sönnerborg, Petter Höglund, Johan Nordström, Agneta Wikman, Lars Wennberg, Greg Nowak
No abstract text is available yet for this article.
January 31, 2017: Transplantation
https://www.readbyqxmd.com/read/28130210/antenatal-management-in-fetal-and-neonatal-alloimmune-thrombocytopenia-a-systematic-review
#13
Dian Winkelhorst, Michael F Murphy, Andreas Greinacher, Nadine Shehata, Tamam Bakchoul, Edwin Massey, Jillian Baker, Lani Lieberman, Susano Tanael, Heather Hume, Donald M Arnold, Shoma Baidya, Gerald Bertrand, James Bussel, Mette Kjaer, Cécile Kaplan, Jens Kjeldsen-Kragh, Dick Oepkes, Greg Ryan
Several strategies can be used to manage fetal or neonatal alloimmune thrombocytopenia (FNAIT) in subsequent pregnancies. Serial fetal blood sampling (FBS) and intrauterine platelet transfusions (IUPT), and weekly maternal intravenous immunoglobulin infusion (IVIG), with or without additional corticosteroid therapy are common options, but the optimal management has not been determined. The aim of this systematic review was to assess antenatal treatment strategies for FNAIT. Four randomized controlled trials and twenty-two non-randomized studies were included...
January 27, 2017: Blood
https://www.readbyqxmd.com/read/28122021/the-effect-of-tacrolimus-and-mycophenolic-acid-on-cd14-monocyte-activation-and-function
#14
Nynke M Kannegieter, Dennis A Hesselink, Marjolein Dieterich, Rens Kraaijeveld, Ajda T Rowshani, Pieter J M Leenen, Carla C Baan
Monocytes and macrophages play key roles in many disease states, including cellular and humoral rejection after solid organ transplantation (SOT). To suppress alloimmunity after SOT, immunosuppressive drug therapy is necessary. However, little is known about the effects of the immunosuppressive drugs tacrolimus and mycophenolic acid (MPA) on monocyte activation and function. Here, the effect of these immunosuppressants on monocytes was investigated by measuring phosphorylation of three intracellular signaling proteins which all have a major role in monocyte function: p38MAPK, ERK and Akt...
2017: PloS One
https://www.readbyqxmd.com/read/28117944/infection-in-organ-transplantation
#15
Jay A Fishman
The prevention, diagnosis and management of infectious disease in transplantation are major contributors to improved outcomes in organ transplantation. The risk of serious infections in organ recipients is determined largely by the interaction between the patient's epidemiological exposures and net state of immune suppression. In organ recipients, there is a significant incidence of drug toxicity and a propensity for drug interactions with immunosuppressive agents used to maintain graft function. Thus, every effort must be made to establish specific microbiologic diagnoses to optimize therapy...
January 24, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28117792/murine-full-thickness-skin-transplantation
#16
Chih-Hsien Cheng, Chen-Fang Lee, Madeline Fryer, Georg J Furtmüller, Byoungchol Oh, Jonathan D Powell, Gerald Brandacher
Murine full-thickness skin transplantation is a well-established in vivo model to study alloimmune response and graft rejection. Despite its limited application to humans, skin transplantation in mice has been widely employed for transplantation research. The procedure is easy to learn and perform, and it does not require delicate microsurgical techniques nor extensive training. Moreover, graft rejection in this model occurs in a very reproducible immunological reaction and is easily monitored by direct inspection and palpation...
January 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28097780/a-man-made-disease-fetal-neonatal-alloimmune-thrombocytopenia-due-to-incompatibility-between-oocyte-donor-and-gestational-mother
#17
Assaf Arie Barg, Aviya Dvir Ifrah, Tzipi Strauss, Michal J Simchen, Raoul Orvieto, Nurit Rosenberg, Gili Kenet
The incompatibility causing fetal and neonatal alloimmune thrombocytopenia (FNAIT) results from a fetus inheriting a paternal human platelet antigen (HPA), which is different from the maternal HPA. We present a unique case of FNAIT in a pregnancy involving an oocyte recipient mother with Turner syndrome. This is the first report of FNAIT in which the suggested mechanism involves antibodies produced by a gestational mother against the incompatible HPA of the oocyte donor.
January 18, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28097704/prophylactic-rhce-and-kell-antigen-matching-impact-on-alloimmunization-in-transfusion-dependent-patients-with-myelodysplastic-syndromes
#18
Y Lin, A Saskin, R A Wells, M Lenis, A Mamedov, J Callum, R Buckstein
BACKGROUND AND OBJECTIVES: Thirty to 80 per cent of patients with myelodysplastic syndromes (MDS) become transfusion-dependent and are at risk for red blood cell (RBC) alloimmunization. This study compared alloimmunization rates in transfusion-dependent patients with MDS at an institution with a policy of prophylactic antigen matching for RhCE and K (PAM) with those transfused at institutions without such a policy (non-PAM). MATERIALS AND METHODS: Transfusion records were retrospectively reviewed to determine total number of RBC transfusions received, whether RBC phenotyping was performed, the type and date of first alloantibody development and receipt of prophylactic antigen matching for RhCE and K...
January 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28097699/maternal-red-blood-cell-alloantibodies-identified-in-blood-samples-obtained-from-iranian-pregnant-women-the-first-population-study-in-iran
#19
Ehsan Shahverdi, Mostafa Moghaddam, Fateme Gorzin
BACKGROUND: The objective was to determine the frequency of occurrence of alloantibodies among pregnant women in Iran. STUDY DESIGN AND METHODS: This was a prospective cross-sectional study, which was carried out in the immunohematology reference laboratory of the Iranian Blood Transfusion Organization in Tehran, Iran, in 2008 to 2015. Screening and identification of red blood cell (RBC) alloantibodies was done on the sera of 7340 pregnant females using the standard tube method and gel column agglutination technique...
January 2017: Transfusion
https://www.readbyqxmd.com/read/28069641/differential-impact-of-chronic-hyperglycemia-on-humoral-versus-cellular-primary-alloimmunity
#20
Nicholas H Bishop, Michelle K Nelsen, K Scott Beard, Ronald G Gill
Diabetes is prevalent among solid organ transplant recipients and is universal among islet transplant recipients. While diabetes is often considered to result in an immune compromised state, the impact of chronic hyperglycemia on host alloimmunity is not clear. Potential immune modifying effects of obesity, autoimmunity, or diabetogenic agents like streptozotocin may confound understanding alloimmunity in experimental models of diabetes. Therefore, we sought to determine the role of chronic hyperglycemia due to insulinopenia on alloimmunity using the non-autoimmune, spontaneously diabetic H-2(b)-expressing C57BL/6 Ins2(Akita) mice (Akita)...
January 9, 2017: Diabetes
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