Hemolytic disease of the fetus and newborn and Rhesus alloimmunization in Latin American countries: a scoping review.

Background: Hemolytic disease of the fetus and newborn (HDFN) is a condition due to maternal blood group antibodies targeting antigens in fetal red blood cells, with significant prenatal/perinatal morbidity and mortality. Severe HDFN cases are often associated with alloimmunization against Rhesus D (RhD) or Kell antigens. Information about HDFN epidemiology and treatment in Latin American countries is limited.

Association of HPA Antigens with Immune Thrombocytopenia: A Case-Control Study by PCR-SSP Method.

Human platelet antigens (HPAs) play a clinically significant role in alloimmunization and the development of immune-mediated disorders such as immune thrombocytopenia (ITP), fetal and neonatal alloimmune thrombocytopenia (FNAIT), and post-transfusion purpura (PTP). Understanding the genetic profiles of HPAs is critical for preventing and treating these conditions. Given the limitations of serological methods in determining HPA genotypes, this study aims to investigate the association between the genotypes of HPA1, HPA2, HPA3, HPA4, and HPA15 antigens and autoimmune thrombocytopenia in Lorestan Province, utilizing the PCR-SSP method.

Evaluation of the clinical effect of a nationwide implementation of targeted routine antenatal anti-D prophylaxis in Denmark.

Background: In 2010, Denmark was the first country to implement a targeted routine antenatal anti-D prophylaxis (tRAADP) program, offering fetal RHD genotyping to all nonimmunized D negative pregnant women. The program represented a shift from only postnatal prophylaxis to a combined antenatal and postnatal prophylaxis. This study aimed to evaluate the clinical effect of tRAADP in Denmark.

Transfusion specific alloimmune responses following blood transfusion pre-kidney transplantation.

It is widely accepted that blood transfusions can cause allosensitisation, but it is often reported that new HLA antibodies are non-specific and transient. This study explores the effect of blood transfusion on allosensitisation in waitlisted transplant patients including the development of transfusion specific antibodies (TSAs), whilst they remain on the waiting list and longitudinally following subsequent transplantation. A total of 105 blood donors of transfusions received by 50 patients on the transplant waiting list were HLA typed.

Biphasic Behavior of Anti-M Antibody and Hemolytic Disease of the Fetus and Newborn (HDFN).

The anti-M antibody is a cold, naturally occurring immunoglobulin M (IgM) antibody that is generally considered clinically insignificant and often overlooked in transfusion practices and assessments of patients at risk for hemolytic disease of the fetus and newborn (HDFN). However, the presence of an IgG component in this case renders the antibody clinically significant, underscoring the necessity for proper serologic testing during prenatal evaluations. We present a case involving an anti-M antibody with an IgG component to highlight the critical importance of thorough serologic testing during prenatal testing.

Dynamics of antibody engagement of red blood cells and .

Exposure to allogenic red blood cells (RBCs), either through pregnancy or transfusion, can result in alloimmunization, which can lead to severe hemolytic transfusion reactions and pregnancy complications. Passively administered antibodies can be used to prevent alloimmunization, where steric hindrance of allogeneic epitopes has been postulated as one mechanism whereby antibody engagement may prevent RBC alloimmunization. However, the dynamics of antibody engagement on the RBC surface has remained difficult to study.

Erythrocyte Alloimmunization and Autoimmunization in the Pediatric Population: A Multicenter, Cross-Sectional Study in Central China.

Background: Erythrocyte alloantibodies and autoantibodies complicate transfusion. However, the prevalence of erythrocyte alloimmunization and autoimmunization has not been estimated in the Chinese pediatric population. Therefore, we investigated the prevalence of erythrocyte alloimmunization and autoimmunization in the Chinese pediatric population with the aim of developing a reasonable transfusion management policy in children from China.

Prevalence of ABO, Rh, and Kell Antigens Among Blood Donors in Al-Qurayyat Region.

Background: The ABO, Rh, and Kell blood groups are the most immunogenic and clinically important blood antigens. These antigens can trigger strong immune responses after blood transfusions, leading to alloimmunization and post-hemolytic transfusion reactions. The aim of this study was to determine prevalence of ABO, Rh, and Kell blood group antigens at the Al-Qurayyat Regional Laboratory and Blood Bank Center, Al-Qurayyat region, Saudi Arabia.

Alloimmunization to low and high prevalence blood group antigens: rare causes of hemolytic disease of the fetus and newborn.

Maternal alloimmunization to paternal blood group antigens is the underlying cause of hemolytic disease of the fetus and newborn. Alloantibodies to the major, clinically significant blood group antigens are readily identified by the blood bank which, in turn, allows for appropriate monitoring of the maternal-fetal unit. However, uncommon blood group antibodies, particularly those directed against low and high prevalence antigens, present a more formidable challenge for obstetricians, neonatologists, and transfusion medicine specialists.

Blood use and alloimmunization in myelodysplastic syndrome patients: A study of a hospital transfusion experience.

Background: Patients with myelodysplastic syndrome (MDS) are characterized by chronic anemia and most of them require transfusion making them prone to developing transfusion dependence (TD) and inducing red blood cell (RBC) alloimmunization. Little information is available regarding the status of transfusions of MDS patients in China.

Materials And Methods: Clinical history and transfusion information of MDS transfusion patients from 2004 to 2023 were collected from electronic medical and laboratory records.