- Patient Preparation
- Lavender (EDTA), pink (K2EDTA) or yellow (ACD Solution A or B).
- Specimen Preparation
- Transport 3 mL whole blood. (Min: 1 mL)
- Storage/Transport Temperature
- Unacceptable Conditions
- Ambient: 72 hours; Refrigerated: 1 week; Frozen: Unacceptable
Characteristics: Progressive renal and cochlear disease with 30-40 percent incidence of ocular involvement; 60 percent of males reach end stage renal disease by age 30 and 85 percent have sensorineural deafness by age 40.
Incidence: Estimated to be between 1 in 5,000 to 1 in 50,000 live births.
Inheritance: X-linked recessive; de novo mutations in 10-15 percent of affected males.
Penetrance: Variable depending on mutation and sex..
Cause: Type 4 collagen (COL4A5) alpha chain mutations.
Clinical Sensitivity: Greater than 80 percent for X-linked Alport syndrome.
Methodology: Bidirectional sequencing of the entire COL4A5 coding region and intron-exon boundaries.
Analytical Sensitivity & Specificity: 99 percent.
Limitations:Diagnostic errors can occur due to rare sequence variations. Regulatory region and deep intronic mutations will not be detected. Large deletions/duplications will not be detected in females. Mutations in genes other than COL4A5 are not evaluated.
Counseling and informed consent are recommended for genetic testing. Consent forms are available online at www.aruplab.com.
See Compliance Statement C: www.aruplab.com/CS
|Component Test Code*||Component Chart Name|
|0051787||Alport Syndrome (COL4A5) Sequencing|
|2001337||ALPORT FGS Specimen|
- Alport syndromesequencing assay
- X-linked Alport syndrome molecular testing