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https://www.readbyqxmd.com/read/27891581/antigen-specificity-determines-anti-red-blood-cell-igg-fc-alloantibody-glycosylation-and-thereby-severity-of-haemolytic-disease-of-the-fetus-and-newborn
#1
Myrthe E Sonneveld, Joke Koelewijn, Masja de Haas, Jon Admiraal, Rosina Plomp, Carolien A M Koeleman, Agnes L Hipgrave Ederveen, Peter Ligthart, Manfred Wuhrer, C Ellen van der Schoot, Gestur Vidarsson
Haemolytic disease of the fetus and newborn (HDFN) is a severe disease in which fetal red blood cells (RBC) are destroyed by maternal anti-RBC IgG alloantibodies. HDFN is most often caused by anti-D but may also occur due to anti-K, -c- or -E. We recently found N-linked glycosylation of anti-D to be skewed towards low fucosylation, thereby increasing the affinity to IgG-Fc receptor IIIa and IIIb, which correlated with HDFN disease severity. Here, we analysed 230 pregnant women with anti-c, -E or -K alloantibodies from a prospective screening cohort and investigated the type of Fc-tail glycosylation of these antibodies in relation to the trigger of immunisation and pregnancy outcome...
November 28, 2016: British Journal of Haematology
https://www.readbyqxmd.com/read/27812263/clinical-significance-of-rare-maternal-anti-jk-a-antibody
#2
Kshitija Mittal, Tanvi Sood, Naveen Bansal, Ravneet Kaur Bedi, Paramjit Kaur, Gagandeep Kaur
We hereby report a rare case of HDFN because of antibody to Kidd (Jk) blood group system-anti Jk(a). An EDTA sample of a baby along with mother's sample was received in the Department for Direct Antiglobulin Test (DAT) alongwith blood requisition for double volume exchange transfusion. On blood grouping, baby's and mother's blood group was found to be B Rh D positive. DAT with polyspecific anti human globulin (AHG) was positive. Screening of mother's serum for irregular antibodies showed anti-Jk(a) antibody...
December 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27812255/fetal-rhd-genotyping-from-circulating-cell-free-fetal-dna-in-plasma-of-rh-negative-pregnant-women-in-iran
#3
Mohammad Hossein Ahmadi, Sedigheh Hantuoshzadeh, Mohammad Ali Okhovat, Nahid Nasiri, Azita Azarkeivan, Naser Amirizadeh
The prenatal determination of the fetal Rh genotype could lead to a substantial reduction in the use of anti-D immunoglobulin and prevention of unnecessary exposure of pregnant women carrying RhD negative fetus. The aim of this study was fetal RHD genotyping through the analysis of cffDNA in plasma samples of RhD negative pregnant women by real-time PCR technique. In this experiment, 30 plasma samples were collected from RhD negative pregnant women. DNA were extracted and real-time PCR reactions were done by specific primers for RHD, SRY and beta-globin (GLO) genes...
December 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27807866/a-jordanian-family-with-three-sisters-apparently-homozygous-for-m-k-and-evidence-for-clinical-significance-of-antibodies-produced-by-m-k-m-k-individuals
#4
Nour Al-Huda Al-Jada
BACKGROUND: The rare M(k) M(k) phenotype is the result of a deletion of the coding regions of both GYPA and GYPB. Red blood cells (RBCs) of individuals homozygous for the rare M(k) gene lack all MNS blood group antigens and have no glycophorin A or glycophorin B. This phenotype is extremely rare and only four families have been reported. CASE REPORT: A 28-year-old woman was referred for assessment of recurrent early neonatal deaths. She was found to be apparently homozygous for M(k) ...
November 3, 2016: Transfusion
https://www.readbyqxmd.com/read/27764238/distribution-of-di-a-and-di-b-allele-frequencies-and-comparisons-among-central-thai-and-other-populations
#5
Oytip Nathalang, Puangpaka Panichrum, Kamphon Intharanut, Phatchira Thattanon, Siriporn Nathalang
Alloantibodies to the Diego (DI) blood group system, anti-Dia and anti-Dib are clinically significant in causing hemolytic transfusion reactions (HTRs) and hemolytic disease of the fetus and newborn (HDFN), especially in Asian populations with Mongolian ancestry. This study aimed to report the frequency of the DI*A and DI*B alleles in a Central Thai population and to compare them with those of other populations previously published. Altogether, 1,011 blood samples from unrelated healthy blood donors at the National Blood Centre, Thai Red Cross Society, Bangkok were included...
2016: PloS One
https://www.readbyqxmd.com/read/27730708/an-innovative-test-for-non-invasive-kell-genotyping-on-circulating-fetal-dna-by-means-of-the-allelic-discrimination-of-k1-and-k2-antigens
#6
Fabiana Cro', Cristina Lapucci, Emilio Vicari, Ginevra Salsi, Nicola Rizzo, Antonio Farina
OBJECTIVE: The aim of this study was to present a new method for fetal Kell genotyping by means of the allelic discrimination of K1 and K2 in real-time polymerase chain reaction (PCR). METHODS: Real-time quantitative polymerase chain reaction incorporating an allele-specific primer was developed for detecting the K allele of KEL. RESULTS: By means of this method, the K1/K2 genotype was able to be determined in all blood samples analyzed. Results using cell-free fetal DNA (cffDNA) from two Kell-negative pregnant women confirmed the Kell-positive genotype of fetuses...
December 2016: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/27643761/persistence-of-villous-immaturity-in-term-deliveries-following-intrauterine-transfusion-for-parvovirus-b19-infection-and-rhd-associated-hemolytic-disease-of-the-fetus-and-newborn
#7
Whitney A McCarthy, Edwina J Popek
Fetal anemia and hydrops may be caused by parvovirus B19 infection and maternal alloimmunization to RhD with subsequent hemolytic disease of the fetus and newborn. The use of intrauterine transfusion over the last few decades has dramatically improved outcomes. Prior literature has extensively documented placental changes associated with untreated parvovirus infection and RhD HDFN in intrauterine fetal demises (IUFD) and pre-term births; however, histopathologic changes in term placentas from term infants treated with IUT have not been reported...
September 19, 2016: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/27605857/anti-m-antibodies-biphasic-reactive-at-room-temperature-and-at-37%C3%A2-c-a-case-series
#8
Siddhi P Shah, Sangeeta M Kalgutkar, Rajesh B Sawant, Anand S Deshpande
Anti-M antibody, which is not reactive at 37°C, is not clinically significant. Reports of clinically significant anti-M antibodies causing hemolytic disease of the fetus and the newborn (HDFN) and delayed hemolytic transfusion reaction (DHTR) are available. We report 13 cases of anti-M antibodies reactive at room temperature (RT) and at 37°C. These were found in patients of varied age groups (11 months to 85 years) with varied clinical diagnosis. All the female patients were multigravida. In all cases, antibody screening was positive at RT as well as at the indirect antiglobulin test (IAT) phase...
July 2016: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/27531851/-positive-coomb-s-test-in-newborns-causes-and-clinical-consequences-summary-of-cases-diagnosed-in-the-blood-bank-in-the-years-2005-to-2012
#9
Thordis Kristinsdottir, Sveinn Kjartansson, Hildur Hardardottir, Thorbjorn Jonsson, Anna Margret Halldorsdottir
INTRODUCTION: Hemolytic disease of the fetus and newborn (HDFN) is caused by the destruction of fetal red blood cells due to red cell antibodies produced by the mother. HDFN can cause fetal hydrops during pregnancy or neonatal jaundice after birth. Direct Antiglobulin Test (DAT) detects antibodies bound to red cells and is a valuable test aiding in the diagnosis of HDFN. In Iceland DAT is routinely performed on cord blood or newborn blood samples if the mother is Rhesus D negative or has non-A/B red cell alloantibodies...
July 2016: Læknablađiđ
https://www.readbyqxmd.com/read/27330002/antibody-mediated-immune-suppression-is-improved-when-blends-of-anti-rbc-monoclonal-antibodies-are-used-in-mice
#10
Lidice Bernardo, Alaa Amash, Danielle Marjoram, Alan H Lazarus
Although the prevention of hemolytic disease of the fetus and newborn is highly effective using polyclonal anti-D, a recombinant alternative is long overdue. Unfortunately, anti-D monoclonal antibodies have been, at best, disappointing. To determine the primary attribute defining an optimal antibody, we assessed suppression of murine red blood cell (RBC) immunization by single-monoclonal antibodies vs defined blends of subtype-matched antibodies. Allogeneic RBCs expressing the HOD antigen (hen egg lysozyme [HEL]-ovalbumin-human transmembrane Duffy(b)) were transfused into naïve mice alone or together with selected combinations of HEL-specific antibodies, and the resulting suppressive effect was assessed by evaluating the antibody response...
August 25, 2016: Blood
https://www.readbyqxmd.com/read/27320948/quantitative-fetomaternal-hemorrhage-assessment-with-the-use-of-five-laboratory-tests
#11
A Gielezynska, A Stachurska, J Fabijanska-Mitek, M Debska, K Muzyka, E Kraszewska
INTRODUCTION: In various countries, standard doses of anti-D IgG used for postpartum immunoprophylaxis of hemolytic disease of fetus and newborn (HDFN) vary from 100 μg to 300 μg. There are also different regulations concerning FMH assessment, and opinions about applicable tests are inconclusive. METHODS: Three flow cytometry tests (FCTs) with anti-D, anti-HbF, anti-HbF+CA antibodies, and two modifications of microscopic Kleihauer-Betke test (KBT) were used. RESULTS: In all artificial mixtures with known concentrations, FCTs and KBT with counting 10 000 RBCs had similar satisfying sensitivity and specificity...
August 2016: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/27275238/correlation-between-the-amount-of-anti-d-antibodies-and-igg-subclasses-with-severity-of-haemolytic-disease-of-foetus-and-newborn
#12
Emilija Velkova
AIM: The aim of this study was to investigate the influence of subclasses to IgG anti-D on the intensity of hemolytic disease of fetus and newborn (HDFN) at 45 fetuses/newborns with symptoms of mild and severe HDFN in Republic of Macedonia. MATERIAL AND METHODS: In retrospective and prospective studies, in a period of 10 years, from 2004 to 2014, there have been immunohemathology tests performed on 22 009 samples on serums of pregnant women. RESULTS: At 37...
June 15, 2015: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/26741962/antimicrobial-activities-of-methanol-ethanol-and-supercritical-co2-extracts-of-philippine-piper-betle-l-on-clinical-isolates-of-gram-positive-and-gram-negative-bacteria-with-transferable-multiple-drug-resistance
#13
Demetrio L Valle, Esperanza C Cabrera, Juliana Janet M Puzon, Windell L Rivera
Piper betle L. has traditionally been used in alternative medicine in different countries for various therapeutic purposes, including as an anti-infective agent. However, studies reported in the literature are mainly on its activities on drug susceptible bacterial strains. This study determined the antimicrobial activities of its ethanol, methanol, and supercritical CO2 extracts on clinical isolates of multiple drug resistant bacteria which have been identified by the Infectious Disease Society of America as among the currently more challenging strains in clinical management...
2016: PloS One
https://www.readbyqxmd.com/read/26708902/prevalence-and-specificity-of-red-blood-cell-alloantibodies-in-patients-from-china-during-1994-2013
#14
Yang Yu, Yi Wang, Xiao-Lin Sun, Chun-Ya Ma, Xiao-Juan Zhang, Xiao-Zhen Guan, Lin-Feng Chen, De-Qing Wang
OBJECTIVE: To analyze the data about red blood cell alloantibodies in patients from mainland China and to provide evidence for formulating a management guideline. METHODS: The Chinese and English literatures about Chinese patients in mainland China published in periodicals were retrieved by CHKD, CNKI, CMJD and PubMed using the key words as unexpected antibody, irregular antibody, blood group antibody, hemolytic transfusion reaction (HTR), hemolytic disease of the newborn (HDN), hemolytic disease of the fetus and newborn (HDFN)...
December 2015: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/26661943/third-trimester-screening-for-alloimmunisation-in-rhc-negative-pregnant-women-evaluation-of-the-dutch-national-screening-programme
#15
Y M Slootweg, J M Koelewijn, I L van Kamp, J G van der Bom, D Oepkes, M de Haas
OBJECTIVE: To evaluate the effect of red blood cell (RBC) antibody screening in the 27th week of pregnancy in Rhc-negative women, on detection of alloimmunisation, undetected at first trimester screening ('late' alloimmunisation), and subsequent haemolytic disease of the fetus and newborn (HDFN), to assess risk factors for late alloimmunisation. DESIGN: Prospective cohort and nested case-control study. SETTING: The Netherlands. POPULATION: Two-year nationwide cohort...
May 2016: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/26638180/unexpected-red-blood-cell-antibody-distributions-in-chinese-people-by-a-systematic-literature-review
#16
REVIEW
Chunxia Chen, Jinzhe Tan, Lixin Wang, Bing Han, Wei Sun, Li Zhao, Chunyan Huang, Bin Tan, Li Qin
BACKGROUND: Unexpected antibodies are frequently associated with hemolytic disease of the fetus and newborn (HDFN) and hemolytic transfusion reactions (HTRs), and screening for those unexpected antibodies is critical for the safety and effectiveness of transfusion. Different populations differ in the prevalence of significant antibodies and also the low-frequency red blood cell (RBC) antigens. In China, antibody screening has been a common practice for pretransfusion testing for more than 10 years...
April 2016: Transfusion
https://www.readbyqxmd.com/read/26637714/hemolytic-disease-of-the-fetus-and-newborn-managing-the-mother-fetus-and-newborn
#17
Meghan Delaney, Dana C Matthews
Hemolytic disease of the fetus and newborn (HDFN) affects 3/100 000 to 80/100 000 patients per year. It is due to maternal blood group antibodies that cause fetal red cell destruction and in some cases, marrow suppression. This process leads to fetal anemia, and in severe cases can progress to edema, ascites, heart failure, and death. Infants affected with HDFN can have hyperbilirubinemia in the acute phase and hyporegenerative anemia for weeks to months after birth. The diagnosis and management of pregnant women with HDFN is based on laboratory and radiographic monitoring...
2015: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/26589360/hemolytic-disease-of-the-fetus-and-newborn-in-the-molecular-era
#18
REVIEW
Ross M Fasano
Maternal-fetal red cell antigen incompatibility can lead to alloimmunization, maternal immunoglobulin transplacental transfer, and hemolytic disease of the fetus and newborn (HDFN). The use of routine antenatal anti-D prophylaxis (RAADP) has sharply decreased the incidence of and mortality from HDFN due to RhD allosensitization. The ability to identify pregnancies/fetuses at risk of HDFN has significantly improved due to paternal molecular RHD zygosity testing, and non-invasive fetal molecular diagnostics for detecting putative antigen(s) (notably RhD) in fetuses utilizing cff-DNA in maternal plasma...
February 2016: Seminars in Fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/26587150/distribution-of-kell-phenotype-among-pregnant-women-in-sokoto-north-western-nigeria
#19
Erhabor Osaro, Malami Aisha Ladan, Isaac Zama, Yakubu Ahmed, Hassan Mairo
INTRODUCTION: Kell antigen is highly immunogenic and is the common cause of antibody production in mismatched blood transfusions, haemolytic transfusion reaction (HTR) and maternal alloimmunization, which causes severe anaemia in neonates. The aim of this study is to determine the prevalence and ethnic variation of the Kell phenotype among pregnant women in Sokoto, Nigeria. METHODS: Kell antigen status of 150 pregnant women aged 18-45 years and mean age 27.19 ±4...
2015: Pan African Medical Journal
https://www.readbyqxmd.com/read/26511760/noninvasive-antenatal-determination-of-fetal-blood-group-using-next-generation-sequencing
#20
REVIEW
Klaus Rieneck, Frederik Banch Clausen, Morten Hanefeld Dziegiel
Hemolytic disease of the fetus and newborn (HDFN) is a condition characterized by a decreased lifespan of fetal red blood cells caused by maternally produced allospecific antibodies transferred to the fetus during pregnancy. The antibodies bind to the corresponding blood group antigens on fetal red blood cells and induce hemolysis. Cell-free DNA derived from the conceptus circulates in maternal blood. Using next-generation sequencing (NGS), it can be determined if this cell-free fetal DNA encodes the corresponding blood group antigen that is the target of the maternal allospecific antibodies...
October 28, 2015: Cold Spring Harbor Perspectives in Medicine
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