Audiological Evidence of Frequent Hereditary Mild, Moderate and Moderate-to-Severe Hearing Loss
T Markova et al, J Per Med, November 4, 2022
We aimed to evaluate the audiological features in patients with mild, moderate, and moderate-to-severe SNHL according to genotype. Audiological and genetic data were analyzed for 251 patients and their relatives with congenital bilateral mild, moderate, and moderate-to-severe SNHL. Hearing loss severity, audiogram profile, interaural symmetry, and dynamics of hearing thresholds were analyzed. In this case, 165 patients had GJB2 gene mutations, 30 patients were identified with STRC mutations, and 16 patients had pathogenic or likely pathogenic USH2A mutations. The presence of at least one GJB2 non-truncating variant in genotype led to less severe hearing impairment.
Comprehensive Genomic Sequencing–Based Screening for Hearing Loss in the Neonatal Intensive Care Setting—Is It Time?
AN Abou Tayoun, JAMA Network Open, July 11, 2022
A recent study suggests that targeted genetic screening—using population-specific common pathogenic variants—combined with physiological and cytomegalovirus testing may be an effective newborn screening strategy for hearing loss, in critically ill neonates and beyond. This combinatory approach has the additional benefit of identifying mild and later-onset hearing loss and providing valuable genetic information that is often missed by traditional NHBS. However, additional work is needed to characterize the genetic landscape of hearing loss across populations and to define the optimal population-wide genetic screening method for deafness.
Association Between Expanded Genomic Sequencing Combined With Hearing Screening and Detection of Hearing Loss Among Newborns in a Neonatal Intensive Care Unit
Y Zhu et al, JAMA Network Open, July 11, 2022
Is expanded genomic sequencing combined with hearing screening associated with the detection of hearing loss and the improvement in the clinical management of patients in the neonatal intensive care unit (NICU)?
Findings In this cohort study that included 8078 patients in the NICU, expanded genomic sequencing was associated with a 15.6% increase in cases of diagnosed hearing loss that were missed by hearing screening and changed the clinical management strategies of these patients. Of 52 patients with a diagnosis of hearing loss, 39 (75%) had genetic findings and experienced a more severe degree of hearing loss.
The views of people with a lived experience of deafness and the general public regarding genetic testing for deafness in the reproductive setting: A systematic review
L Freeman et al, Genetics in Medicine, June 3, 2022
Most studies indicated interest in the use of prenatal diagnosis for deafness. However, there were mixed views, and sometimes strongly held views, expressed regarding the reproductive options that should be available to those with an increased chance of having a child with deafness. Studies were small, from a limited number of countries, and most were too old to include views regarding preimplantation genetic testing.