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Unrenewable Cells00:50

Unrenewable Cells

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In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
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Stem Cell Therapy for Tissue Regeneration01:21

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Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
The two main cell...
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Stem Cell Culture01:17

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Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and...
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iPS Cell Differentiation01:22

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The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Mesenchymal Stem Cells01:19

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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Embryonic Stem Cells00:58

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Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
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Related Experiment Video

Updated: Jul 15, 2025

Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage
07:13

Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage

Published on: February 10, 2023

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Stem cells as potential therapeutics for hearing loss.

Qiaojun Fang1,2, Yongjie Wei1, Yuhua Zhang1

  • 1Department of Otolaryngology-Head and Neck Surgery, the Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.

Frontiers in Neuroscience
|September 25, 2023
PubMed
Summary

Stem cell therapy shows promise for treating hearing loss by regenerating inner ear cells. Combining stem cells with nanomaterials and exosomes may enhance repair for hearing restoration.

Keywords:
clinical trialexosomeshearing lossnanomaterialsstem cells

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Area of Science:

  • Regenerative Medicine
  • Otolaryngology
  • Biotechnology

Background:

  • Hearing impairment is a significant global health issue.
  • Stem cell therapy offers a promising avenue for tissue regeneration.
  • Current treatments for hearing loss are limited in efficacy.

Purpose of the Study:

  • To review recent advancements in stem cell therapy for hearing loss.
  • To explore the synergistic potential of nanomaterials and stem cells in auditory tissue repair.
  • To summarize the progress of exosome-based therapies for hearing restoration.

Main Methods:

  • Literature review of stem cell therapy applications in hearing loss.
  • Analysis of studies combining stem cells with nanomaterials.
  • Review of research on stem cell-derived exosomes for auditory regeneration.

Main Results:

  • Stem cell therapy demonstrates potential for regenerating damaged inner ear hair cells and spiral ganglion neurons.
  • Nanomaterials can enhance stem cell efficacy by modulating the cellular microenvironment.
  • Stem cell-derived exosomes show promise in tissue repair and regeneration for hearing loss treatment.

Conclusions:

  • Stem cell therapy, particularly when combined with nanomaterials or exosomes, presents a promising strategy for hearing loss treatment.
  • Further research is needed to overcome technical and practical limitations for clinical translation.
  • These regenerative approaches hold potential for eventual clinical application in restoring hearing function.