HLA –A B C DR DQ DP Loci Typing

What is HLA –A B C DR DQ DP Loci Typing test?

HLA –A B C DR DQ DP loci typing test analyzes a person's Human Leukocyte Antigen (HLA) genes, specifically the Class I (A, B, C) and Class II (DR, DQ, DP) genes, to identify their unique HLA type. This is crucial for determining compatibility in organ and bone marrow (hematopoietic stem cell) transplants by minimizing the risk of rejection and graft-versus-host disease

Why consider HLA –A B C DR DQ DP Loci Typing test?

• Improves compatibility and outcomes: Closer HLA matching lowers risks of rejection, graft failure, and graft‑versus‑host disease, informing donor selection and immunosuppression strategies.

• Comprehensive coverage: Including DP along with A, B, C, DR, and DQ captures additional class II mismatches that can influence alloimmune responses, especially relevant in HSCT and some solid‑organ contexts.
• High‑resolution clarity: Allele‑level typing minimizes ambiguity from highly polymorphic HLA genes, enabling accurate match grading across registries and transplant centers.

Who should get tested for HLA –A B C DR DQ DP Loci Typing test?

• Transplant candidates and potential donors: Individuals being evaluated for HSCT or solid‑organ transplantation, and their related or unrelated donors, to determine match grade before crossmatch and antibody testing.
• Donor registries and cord blood units: Typing at A, B, C, DR, DQ, DP improves search efficiency and match quality for unrelated donor allocation.
• Patients with HLA‑associated considerations: Cases where allele‑level information may guide risk, eligibility, or downstream testing, often coordinated by transplant immunology teams.

More Information about HLA –A B C DR DQ DP Loci Typing test

HLA is central to transplant compatibility: matching donor and recipient HLA types and ensuring no donor‑specific HLA antibodies are present reduces rejection risk, improves graft survival, and guides immunosuppression strategies. A mismatch between a donor's and recipient's HLAs can trigger an immune response, leading to graft (transplanted organ or tissue) rejection. HLA matching aims to find a donor whose HLAs are as similar as possible to the recipient's, which increases the likelihood of graft acceptance and reduces the risk of rejection and other complications.

OTHER NAMES: High‑resolution HLA typing (A, B, C, DR, DQ, DP), HLA class I and II allele typing by NGS, Extended HLA typing including DP loci