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Interpretive Handbook

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Test 34990 :
HLA Class II Molecular Typing Disease Association

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

Human leukocyte antigens (HLA) are regulators of the immune response that play a key role in transplantation.

                                                                                                           

Sequence-specific oligonucleotides are designed to provide low-to-medium resolution for HLA Class II (DR and DQ) typing. Low-to-medium resolution defines the typing at the antigen level. This is in contrast to high-resolution typing, which defines typing at the allele (molecular) level and is used primarily for typing donor-recipient pairs for unrelated bone marrow transplantation.

Useful For Suggests clinical disorders or settings where the test may be helpful

Determining HLA Class II compatibility on specimens from bone marrow and solid organ transplant candidates and their donors

Interpretation Provides information to assist in interpretation of the test results

Interpretation depends on the rationale for ordering the test. Assessments of acceptable donor/recipient matches are made on a case-by-case basis.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

No significant cautionary statements

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Not applicable

Clinical References Provides recommendations for further in-depth reading of a clinical nature

1. Terasaki PI, Bernoco F, Park MS, et al: Microdroplet testing for HLA-A, B, C and D antigens. Am J Clin Path 1978 Feb;69(2):103-120

2. Colinas RJ, Bellisario R, Pass KA: Multiplexed genotyping of beta-globin variants from PCR-amplified newborn blood spot DNA by hybridization with allele-specific oligodeoxynucleotides coupled to an array of fluorescent microspheres. Clin Chem 2000 Jul;46(7):996-998


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