OBSOLETE: Anti-HLA hyperimmunization

Anti-HLA hyperimmunization is a condition in which a person's immune system produces very high levels of antibodies against human leukocyte antigens (HLA). HLA are proteins found on the surface of most cells in the body. These antibodies typically develop after exposure to foreign HLA through blood transfusions, organ transplants, or pregnancy. When someone becomes hyperimmunized, their body has a strong immune reaction against a wide range of HLA types, which makes it extremely difficult to find a compatible organ donor if they need a transplant. This condition is most commonly seen in patients who are waiting for a kidney or other organ transplant. It is important to note that this entry is listed as 'OBSOLETE' in Orphanet, meaning it is no longer classified as a standalone rare disease in current medical databases. It is now generally considered a clinical state or complication rather than a distinct disease. Patients with high levels of anti-HLA antibodies (often called 'highly sensitized' patients) face longer wait times for transplantation and may need specialized desensitization treatments. Treatment approaches include plasmapheresis (filtering the blood to remove antibodies), intravenous immunoglobulin (IVIG), and medications that suppress the immune system. Newer therapies targeting specific immune cells, such as rituximab and bortezomib, have also been used to help reduce antibody levels and improve the chances of a successful transplant.

Age of Onset

Adult

Begins in adulthood (age 18 or older)

Source: openFDA + DailyMed · NDA / BLA labels with structured indications · refreshed weekly

Source: ClinicalTrials.gov · synced daily · phases, status, and PI names normalized at ingest

Source: NPI Registry + PubMed · trial PI roles cross-referenced with ClinicalTrials.gov · ranked by match score (publications + PI activity + community signal)

Source: NORD Rare Disease Centers + NIH Undiagnosed Diseases Network (UDN) · centers verified active within last 12 months

Source: PubMed + NIH RePORTER + openFDA + clinical-journal RSS · last 30 days · disease-tagged at ingest by AI extraction with human QC

Bring these to your next appointment

• Q1.What is my current panel reactive antibody (PRA) level, and what does it mean for my transplant chances?,Am I a candidate for desensitization treatment to lower my antibody levels?,Are there paired kidney exchange or acceptable mismatch programs available to me?,How often will my antibody levels be monitored?,What can I do to avoid further sensitization (such as avoiding unnecessary blood transfusions)?,What are the risks and benefits of desensitization therapy in my specific case?,How long might I realistically wait for a compatible donor?

Common questions about OBSOLETE: Anti-HLA hyperimmunization