Overview
Rhesus isoimmunization due to anti-C antibodies occurs when Rh-negative individuals produce antibodies against the C antigen following exposure to Rh-positive blood or other Rh-positive substances, potentially leading to hemolytic disease of the newborn (HDN) in subsequent pregnancies.Diagnosis
Detection of anti-C antibodies via serological testing (indirect antiglobulin test, DAT/IAT) 1.
Confirmatory tests may include elution and identification of specific antibodies 1.Management
First-line: Avoidance of Rh-positive blood exposure through careful blood transfusion protocols and Rh immunoglobulin (RhIG) prophylaxis for Rh-negative women carrying Rh-positive fetuses 1.
Adjunctive: Monitoring maternal antibody levels and fetal status through serial ultrasounds and amniocentesis if indicated 1.Special Populations
Pregnancy: RhIG administration at 28 weeks gestation and within 72 hours postpartum for Rh-negative mothers carrying Rh-positive fetuses to prevent maternal sensitization 1.
Pediatrics: Not specifically addressed in provided abstracts.
Elderly: Not specifically addressed in provided abstracts.
Comorbidities: Management strategies for comorbidities remain standard care with additional vigilance for Rh-incompatibility issues 1.Key Recommendations
Administer Rh immunoglobulin prophylaxis to Rh-negative pregnant women carrying Rh-positive fetuses to prevent maternal sensitization and subsequent HDN 1 (Evidence: Strong).
Implement rigorous blood transfusion protocols to minimize Rh-positive blood exposure in Rh-negative individuals 1 (Evidence: Strong).
Regular monitoring of maternal anti-C antibody levels and fetal well-being in at-risk pregnancies is recommended 1 (Evidence: Moderate).References
1 Rup B, Pallardy M, Sikkema D, Albert T, Allez M, Broet P et al.. Standardizing terms, definitions and concepts for describing and interpreting unwanted immunogenicity of biopharmaceuticals: recommendations of the Innovative Medicines Initiative ABIRISK consortium. Clinical and experimental immunology 2015. link
2 Kitagawa T, Tanimori H, Yoshida K, Miura T, Fujiwara K. High dimensional structure of the antigen-binding site of anti-viomycin immunoglobulin analyzed by enzyme immunoassay. Journal of biochemistry 1982. link