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Journal of Translational Medicine
Published in: Journal of Translational Medicine 1/2010

Open Access 01-12-2010 | Research

Retention of progenitor cell phenotype in otospheres from guinea pig and mouse cochlea

Authors: Jeanne Oiticica, Luiz Carlos M Barboza-Junior, Ana Carla Batissoco, Karina Lezirovitz, Regina C Mingroni-Netto, Luciana A Haddad, Ricardo F Bento

Published in: Journal of Translational Medicine | Issue 1/2010

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Abstract

Background

Culturing otospheres from dissociated organ of Corti is an appropriate starting point aiming at the development of cell therapy for hair cell loss. Although guinea pigs have been widely used as an excellent experimental model for studying the biology of the inner ear, the mouse cochlea has been more suitable for yielding otospheres in vitro. The aim of this study was to compare conditions and outcomes of otosphere suspension cultures from dissociated organ of Corti of either mouse or guinea pig at postnatal day three (P3), and to evaluate the guinea pig as a potential cochlea donor for preclinical cell therapy.

Methods

Organs of Corti were surgically isolated from P3 guinea pig or mouse cochlea, dissociated and cultivated under non-adherent conditions. Cultures were maintained in serum-free DMEM:F12 medium, supplemented with epidermal growth factor (EGF) plus either basic fibroblast growth factor (bFGF) or transforming growth factor alpha (TGFα). Immunofluorescence assays were conducted for phenotype characterization.

Results

The TGFα group presented a number of spheres significantly higher than the bFGF group. Although mouse cultures yielded more cells per sphere than guinea pig cultures, sox2 and nestin distributed similarly in otosphere cells from both organisms. We present evidence that otospheres retain properties of inner ear progenitor cells such as self-renewal, proliferation, and differentiation into hair cells or supporting cells.

Conclusions

Dissociated guinea pig cochlea produced otospheres in vitro, expressing sox2 and nestin similarly to mouse otospheres. Our data is supporting evidence for the presence of inner ear progenitor cells in the postnatal guinea pig. However, there is limited viability for these cells in neonatal guinea pig cochlea when compared to the differentiation potential observed for the mouse organ of Corti at the same developmental stage.
Appendix
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Metadata
Title
Retention of progenitor cell phenotype in otospheres from guinea pig and mouse cochlea
Authors
Jeanne Oiticica
Luiz Carlos M Barboza-Junior
Ana Carla Batissoco
Karina Lezirovitz
Regina C Mingroni-Netto
Luciana A Haddad
Ricardo F Bento
Publication date
01-12-2010
Publisher
BioMed Central
Published in
Journal of Translational Medicine / Issue 1/2010
Electronic ISSN: 1479-5876
DOI
https://doi.org/10.1186/1479-5876-8-119

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