Journal article
Dissecting the molecular basis of organ of Corti development: Where are we now?
Hearing research, Vol.276(1-2), pp.16-26
2011
DOI: 10.1016/j.heares.2011.01.007
PMCID: PMC3097286
PMID: 21256948
Abstract
This review summarizes recent progress in our understanding of the molecular basis of cochlear duct growth, specification of the organ of Corti, and differentiation of the different types of hair cells. Studies of multiple mutations suggest that developing hair cells are involved in stretching the organ of Corti through convergent extension movements. However, Atoh1 null mutants have only undifferentiated and dying organ of Corti precursors but show a near normal extension of the cochlear duct, implying that organ of Corti precursor cells can equally drive this process. Some factors influence cochlear duct growth by regulating the cell cycle and proliferation. Shortened cell cycle and premature cell cycle exit can lead to a shorter organ of Corti with multiple rows of hair cells (e.g., Foxg1 null mice). Other genes affect the initial formation of a cochlear duct with or without affecting the organ of Corti. Such observations are consistent with evolutionary data that suggest some developmental uncoupling of cochlear duct from organ of Corti formation. Positioning the organ of Corti requires multiple genes expressed in the organ of Corti and the flanking region. Several candidate factors have emerged but how they cooperate to specify the organ of Corti and the topology of hair cells remains unclear. Atoh1 is required for differentiation of all hair cells, but regulation of inner versus outer hair cell differentiation is still unidentified. In summary, the emerging molecular complexity of organ of Corti development demands further study before a rational approach towards regeneration of unique types of hair cells in specific positions is possible.
Details
- Title: Subtitle
- Dissecting the molecular basis of organ of Corti development: Where are we now?
- Creators
- Bernd FRITZSCH - Department of Biology, College of Liberal Arts and Sciences, 143 BB, University of Iowa, Iowa City, IA 52242, United StatesIsrat JAHAN - Department of Biology, College of Liberal Arts and Sciences, 143 BB, University of Iowa, Iowa City, IA 52242, United StatesNing Pan - Department of Biology, College of Liberal Arts and Sciences, 143 BB, University of Iowa, Iowa City, IA 52242, United StatesJennifer KERSIGO - Department of Biology, College of Liberal Arts and Sciences, 143 BB, University of Iowa, Iowa City, IA 52242, United StatesJeremy DUNCAN - Department of Biology, College of Liberal Arts and Sciences, 143 BB, University of Iowa, Iowa City, IA 52242, United StatesBenjamin KOPECKY - Department of Biology, College of Liberal Arts and Sciences, 143 BB, University of Iowa, Iowa City, IA 52242, United States
- Resource Type
- Journal article
- Publication Details
- Hearing research, Vol.276(1-2), pp.16-26
- DOI
- 10.1016/j.heares.2011.01.007
- PMID
- 21256948
- PMCID
- PMC3097286
- NLM abbreviation
- Hear Res
- ISSN
- 0378-5955
- eISSN
- 1878-5891
- Publisher
- Elsevier; Amsterdam
- Language
- English
- Date published
- 2011
- Academic Unit
- Iowa Neuroscience Institute; Biology; Craniofacial Anomalies Research Center
- Record Identifier
- 9984070876602771
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