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Related Experiment Video

Updated: Jun 27, 2026

Isolating LacZ-expressing Cells from Mouse Inner Ear Tissues using Flow Cytometry

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Published on: December 23, 2011

[Epidermal stem cells in the tympanic membrane].

Wu-qing Wang¹, Zheng-min Wang, Jie Tian

¹Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai 200031, China. wwuqing@eastday.com

Zhonghua Er Bi Yan Hou Ke Za Zhi

|April 9, 2005

Summary

Epithelial stem cells in the tympanic membrane are concentrated in the malleus handle and annulus regions. These tympanic membrane stem cells can be purified based on their adherence time.

Area of Science:

Otolaryngology
Stem Cell Biology
Tissue Engineering

Context:

The tympanic membrane's regenerative capacity is crucial for hearing health.
Identifying and culturing epithelial stem cells is key to understanding tympanic membrane repair.
Previous studies have not precisely localized stem cell populations within the tympanic membrane.

Purpose:

To map the distribution of epithelial stem cells within the rat tympanic membrane.
To characterize the growth patterns of tympanic membrane epithelial cells from distinct regions.
To develop effective culture techniques for isolating tympanic membrane stem cells.

Summary:

Immunohistochemistry revealed cytokeratin 19 and integrin beta1 positive cells in the malleus handle and annulus regions, but not the central pars tensa.

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Isolating Hair Follicle Stem Cells and Epidermal Keratinocytes from Dorsal Mouse Skin

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Published on: April 29, 2016

Pars flaccida showed scattered positive cells in the basal layer. Perforation increased positive cells in the annulus and malleus handle regions.

Epithelial cells from the annulus region exhibited faster doubling times and better colony formation in culture, especially with early adherence.

Impact:

This study precisely locates tympanic membrane epithelial stem cells to the malleus handle and annulus.
The findings provide a basis for developing targeted therapies for tympanic membrane regeneration.
Culture techniques based on adherence time offer a simplified method for purifying these valuable stem cells.