Usher Syndrome
NGS panel

Genes
(full coding
region):		 ABHD12, ADGRV1 (GPR98), CDH23, CIB2, CLRN1, COL4A6, DSPP (excluding exon 5), GIPC3, HARS1, KARS1, LHFPL5, LOXHD1, MYO7A, PCDH15, PDZD7, TNC, USH2A, USH1C, USH1G, WHRN (DFNB31)

List of diseases covered by the panel
Lab method: NGS panel with CNV analysis
TAT: 6-9 weeks
Specimen requirements: 2-4 ml of blood with anticoagulant EDTA

1 µg DNA in TE, AE or pure sterile water at 100-250 ng/µl
SThe A260/A280 ratio should be 1.8-2.0. DNA sample should be run on an agarose gel as a single band, showing no degradation, alongside with a quantitative DNA marker.
Ordering information: Go to online ordering or download sample submission form

Targeted regions sequencing

Genes
(targeted
regions):		 ADGRV1 (GPR98), CDH23, CLRN1, MYO7A, PCDH15, USH2A, USH1C, USH1G, WHRN (DFNB31)
Lab method: Next generation sequencing
TAT: 2-4 weeks
Specimen requirements: 2-4 ml of blood with anticoagulant EDTA

6 µg DNA in TE, AE or pure sterile water at 100-250 ng/µl
The A260/A280 ratio should be 1.8-2.0. DNA sample should be run on an agarose gel as a single band, showing no degradation, alongside with a quantitative DNA marker.
Ordering information: Go to online ordering or download sample submission form

Deletion/duplication analysis

Genes: USH2A, PCDH15
Lab method: MLPA
TAT: 4-6 weeks
Specimen requirements: 2-4 ml of blood with anticoagulant EDTA

2 µg DNA in TE, AE or pure sterile water at 100-250 ng/µl
The A260/A280 ratio should be 1.8-2.0. DNA sample should be run on an agarose gel as a single band, showing no degradation, alongside with a quantitative DNA marker.
Ordering information: Go to online ordering or download sample submission form

Indications for genetic testing:

1. Confirmation of clinical diagnosis
2. Carrier testing for at-risk family members
3. Genetic counseling
4. Prenatal diagnosis for known familial mutation

Usher syndrome is a combination of retinitis pigmentosa and sensorineural hearing loss with or without vestibular dysfunction. Usher syndrome represents 50% of all cases with deafness and blindness. Usher syndrome is inherited in an autosomal recessive manner. Three major clinical types can be distinguished. Usher syndrome type I (USH1) is characterized by severe to profound congenital hearing loss, RP and vestibular areflexia. Patients with Usher syndrome type II (USH2) have moderate to severe hearing loss, RP and normal or variable vestibular function. Patients with Usher syndrome type III (USH3) have progressive hearing loss, RP and variable vestibular function.