PubMed · 15202471
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D Shemin, R Bentley. 2001. David Rittenberg.. https://pubmed.ncbi.nlm.nih.gov/15202471/
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The stria vascularis (SV) is an essential component of the inner ear that regulates the ionic environment required for hearing. SV degeneration disrupts cochlear homeostasis, leading to irreversible hearing loss, yet a comprehensive understanding of the SV, and consequently therapeutic availability for SV degeneration, is lacking. We developed a whole-tissue explant model from neonatal and mature mice to create a platform for advancing SV research. We validated our model by demonstrating that the proliferative behavior of the SV in vitro mimics SV in vivo. We also provided evidence for pharmacological experimentation by investigating the role of Wnt/β-catenin signaling in SV proliferation. Finally, we performed single-cell RNA sequencing from in vivo neonatal and mature mouse SV and surrounding tissue and revealed key genes and pathways that may play a role in SV proliferation and maintenance. Together, our results contribute new insights into investigating biological solutions for SV-associated hearing loss.
Cell-free expression techniques have emerged as promising tools for the production of membrane proteins for structural and functional analysis. Elimination of toxic effects and a variety of options to stabilize the synthesized proteins enable the synthesis of otherwise difficult to obtain proteins. Modifications in the reaction design result in preparative scale production rates of cell-free reactions and yield in milligram amounts of membrane proteins per one millilitre of reaction volume. A diverse selection of detergents can be supplied into the reaction system without inhibitory effects to the translation machinery. This offers the unique opportunity to produce a membrane protein directly into micelles of a detergent of choice. We present detailed protocols for the cell-free production of membrane proteins in different modes and we summarize the current knowledge of this technique. A special emphasize will be on the production of soluble and functionally folded membrane proteins in presence of suitable detergents. In addition, we will highlight the advantages of cell-free expression for the structural analysis of membrane proteins especially by liquid state nuclear magnetic resonance spectroscopy and we will discuss new strategies for structural approaches.
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