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Rely strial

Lukas D Landegger, Demetri Psaltis, Konstantina M Stankovic
INTRODUCTION: As otology enters the field of gene therapy and human studies commence, the question arises whether audiograms - the current gold standard for the evaluation of hearing function - can consistently predict cellular damage within the human inner ear and thus should be used to define inclusion criteria for trials. Current assumptions rely on the analysis of small groups of human temporal bones post mortem or from psychophysical identification of cochlear "dead regions" in vivo, but a comprehensive study assessing the correlation between audiometric thresholds and cellular damage within the cochlea is lacking...
May 2016: Hearing Research
Mark-Oliver Trowe, Hannes Maier, Marianne Petry, Michaela Schweizer, Karin Schuster-Gossler, Andreas Kispert
In the cochlea, sensory transduction depends on the endocochlear potential (EP) and the unique composition of the endolymph, both of which are maintained by a highly specialized epithelium at the cochlear lateral wall, the stria vascularis. The generation of the EP by the stria vascularis, in turn, relies on the insulation of an intrastrial extracellular compartment by epithelial basal cells. Despite the physiological importance of basal cells, their cellular origin and the molecular pathways that lead to their differentiation are unclear...
November 1, 2011: Developmental Biology
I Thalmann, N Y Marcus, R Thalmann
The levels of the adenine nucleotides ATP, ADP, and AMP in the stria vascularis were measured under normal conditions, and following various durations of ischemia. The concentrations of these compounds were used for the calculation of the adenylate energy charge, the energy status and the phosphorylation state of the stria. Following 10 min of ischemia the adenylate energy charge had decreased three fold, the energy status seven fold and the phosphorylation state 14 fold. To study the potential for recovery of strial function following various brief and prolonged ischemic intervals, a method for the perfusion of the ear via the anterior inferior cerebellar artery was developed...
1979: Archives of Oto-rhino-laryngology
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