Otology

Transplantation of bone marrow-derived neurospheres into guinea pig cochlea

  1. Hideaki Ogita MD,
  2. Takayuki Nakagawa MD, PhD*,
  3. Tatsunori Sakamoto MD, PhD,
  4. Takatoshi Inaoka MD,
  5. Juichi Ito MD, PhD

Article first published online: 7 JAN 2010

DOI: 10.1002/lary.20776

Issue

The Laryngoscope

The Laryngoscope

Volume 120, Issue 3, pages 576–581, March 2010

Additional Information

How to Cite

Ogita, H., Nakagawa, T., Sakamoto, T., Inaoka, T. and Ito, J. (2010), Transplantation of bone marrow-derived neurospheres into guinea pig cochlea. The Laryngoscope, 120: 576–581. doi: 10.1002/lary.20776

Author Information

  1. Department of Otolaryngology–Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

*Department of Otolaryngology–Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kawaharacho 54, Shogoin, Sakyo-ku, 606-8507 Kyoto, Japan

Publication History

  1. Issue published online: 16 FEB 2010
  2. Article first published online: 7 JAN 2010
  3. Manuscript Accepted: 13 OCT 2010
  4. Manuscript Received: 19 AUG 2010

Funded by

  • Japanese Ministry of Health, Labor and Welfare

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Keywords:

  • Allograft;
  • cell therapy;
  • cochlea;
  • neurosphere;
  • spiral ganglion neuron;
  • regeneration

Abstract

Objectives/Hypothesis.

To investigate the potential of neurally induced bone marrow stromal cells (BMSCs) as transplants for replacement of spiral ganglion neurons.

Methods.

BMSCs were harvested from the femurs and tibias of adult guinea pigs. BMSCs were cultured with neural induction media and formed spheres. The capacity of BMSC-derived spheres for neural differentiation was examined by immunocytochemistry in vitro. BMSC-derived spheres were injected into the modiolus of the intact cochleae or those locally damaged by ouabain, followed by histological and functional analyses.

Results.

In vitro analysis revealed a high capacity of BMSC-derived spheres for neural differentiation. After transplantation into the cochlear modiolus, the survival and neural differentiation of BMSC-derived spheres was observed in both the intact and damaged cochleae. In intact cochleae, transplants settled in various portions of the cochlea, including the cochlear modiolus, whereas in damaged cochleae, transplants were predominantly observed in the internal auditory meatus. Transplantation of BMSC-derived spheres resulted in no functional recovery of the cochlea or protection of host spiral ganglion neurons.

Conclusions.

The present findings indicate that BMSC-derived spheres can be a source for replacement of spiral ganglion neurons, although further manipulations are required for functional recovery. Laryngoscope, 2010

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