¸ñÀû: Transcription factor (TF) is a protein that binds to promotor
regions of
DNA, thereby regulating transcription to mRNA in the process of
central
dogma. While approximately 1600 TFs have been documented in
humans, the
clinical phenotypes and genotypes of TFs, if mutated, have never
been
characterized in the context of hearing loss. We herein present a
portfolio of TF variants that cause hearing loss. ¹æ¹ý:We reviewed the in-house database of hereditary hearing loss in
SNUH and
SNUBH. Patients carrying variants of TFs were identified, and their
genotypes and clinical phenotypes, including audiologic
characteristics,
radiologic abnormalities, hearing loss progression, rehabilitation
results, were analyzed. °á°ú:A total of 41 families with variants in TFs including POU3F4 (15,
36.6%), POU4F3 (8, 19.5%), LMX1A (4, 9.7%), ATOH1 (1, 2.4%), GRHL2 (1,
2.4%), MITF (4, 9.7%), SOX10 (3, 7.3%), and PAX3 (5, 12.2%) were
identified in this study. Specifically, DFNX2 phenotype associated
with POU3F4 variants were found with incomplete partition type III
malformation and exhibited mixed or sensorineural hearing loss (SNHL).
DFNX2 patients¡¯ auditory performance, if not always, was less than 4
at two years postoperatively, without showing genotype-phenotype
correlation. Further, POU4F3 variants frequently exhibited moderately
severe, mid-frequency specific SNHL, while LMX1A variants were closely
associated with autosomal dominant asymmetric hearing loss. A
potential correlation between transcriptional activity and auditory
phenotype was noted exclusively in LMX1A variants, but not POU4F3.
Additionally, variants in TFs that cause syndromic hearing loss were
mostly involved in MITF, SOX10, and PAX3 pertinent to Waardenburg
syndrome. °á·Ð:We, for the first time, present a portfolio of the transcription
factors
that cause hearing loss in humans if mutated, and offer clinical
implications based on clinical phenotypes and genotypes under
this era
of precision medicine and customized auditory rehabilitation. |