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Related Concept Videos

Clinical Applications of Epidermal Stem Cells01:19

Clinical Applications of Epidermal Stem Cells

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Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
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The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
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Related Experiment Video

Updated: Dec 26, 2025

Author Spotlight: Enhancing Skin Model Diversity with Cost-Effective 3D Cellular Models
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Flexible, surface-lighting MicroLED skin patch for multiple human skincare.

Jae Hee Lee1, Min Seo Kim1, Seung Hyung Lee1

  • 1Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.

Biomaterials
|February 4, 2025
PubMed
Summary
This summary is machine-generated.

A new flexible microLED patch offers uniform light for skincare. This wearable device enhances skin rejuvenation and pore tightening, addressing aesthetic concerns in an aging population.

Keywords:
Chip transferClinical trialsMicroLEDPhotobiomodulationSkin patchSurface-lighting

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Area of Science:

  • Biomedical Engineering
  • Dermatology
  • Materials Science

Background:

  • Growing global population and increased interest in aesthetic appearance.
  • Wearable light-emitting diode (LED) devices are popular for non-invasive, home-use cosmetic treatments.
  • Limitations of conventional LED chips include inflexibility and uneven light emission, reducing skin penetration.

Purpose of the Study:

  • To introduce a flexible, surface-lighting microLED (FSLED) patch for enhanced skincare applications.
  • To overcome the limitations of conventional LED devices for improved cosmetic results.
  • To demonstrate the efficacy of FSLED technology in clinical trials.

Main Methods:

  • Fabrication of the FSLED patch using a pick-and-place transfer technique.
  • Design for mechanical flexibility and uniform light emission conforming to skin.
  • Conducting clinical trials to evaluate FSLED effects on skin.

Main Results:

  • FSLED patch demonstrates high-density irradiation over large areas with mechanical flexibility.
  • Uniform light emission achieved by conforming to skin for efficient delivery.
  • Clinical trials confirmed FSLED effectiveness for pore tightening and skin rejuvenation.

Conclusions:

  • The developed FSLED patch provides a flexible and uniform light-emission solution for cosmetic skincare.
  • FSLED technology offers a promising non-invasive approach for improving skin appearance.
  • Clinical evidence supports the use of FSLED for aesthetic skin treatments like pore reduction and rejuvenation.