Time-resolved quantitative proteomic analysis of the developing Xenopus otic vesicle reveals putative congenital hearing loss candidates

Document Type

Journal Article

Publication Date

9-15-2023

Journal

iScience

Volume

26

Issue

9

DOI

10.1016/j.isci.2023.107665

Keywords

Developmental biology; Model organism; Molecular network; Proteomics

Abstract

Over 200 genes are known to underlie human congenital hearing loss (CHL). Although transcriptomic approaches have identified candidate regulators of otic development, little is known about the abundance of their protein products. We used a multiplexed quantitative mass spectrometry-based proteomic approach to determine protein abundances over key stages of otic morphogenesis to reveal a dynamic expression of cytoskeletal, integrin signaling, and extracellular matrix proteins. We correlated these dynamically expressed proteins to previously published lists of putative downstream targets of human syndromic hearing loss genes: (BOR syndrome), (CHARGE syndrome), and (Waardenburg syndrome). We identified transforming growth factor beta-induced (Tgfbi), an extracellular integrin-interacting protein, as a putative target of Six1 that is required for normal otic vesicle formation. Our findings demonstrate the application of this dataset to understanding the dynamic regulation of proteins during otic development and to discovery of additional candidates for human CHL.

Department

Anatomy and Regenerative Biology

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