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Cells of the Epidermis

Cells of the Epidermis

The epidermis is made of four or five layers of epithelial cells, depending on its location in the body. From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
The cells in all these layers except the stratum basale are called keratinocytes, a type of cell that manufactures and stores the protein keratin. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from...

Cellular Differentiation

Cellular Differentiation

How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...

Cell Diversity

Cell Diversity

The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
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Multipotency and Niche of Bulge Stem Cell

Multipotency and Niche of Bulge Stem Cell

A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...

Renewal of Skin Epidermal Stem Cells

Renewal of Skin Epidermal Stem Cells

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 cells,...

Source And Potency Of Stem Cells

Source And Potency Of Stem Cells

Stem cells are undifferentiated cells with extensive self-renewal properties that help them maintain their population during the fetal and adult stages of life. They can specialize in all cell types of the human body. However, their differential potential may vary and can be classified into five types. Stem cells can be (1) Totipotent, (2) Pluripotent, (3) Multipotent, (4) Oligopotent, and (5) Unipotent. Each stem cell has a specific origin; the fertilized egg or zygote is a totipotent cell and...

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Related Experiment Video

Updated: Jun 2, 2026

Establishing a High Throughput Epidermal Spheroid Culture System to Model Keratinocyte Stem Cell Plasticity

Establishing a High Throughput Epidermal Spheroid Culture System to Model Keratinocyte Stem Cell Plasticity

Published on: January 30, 2021

[Keratinocytes--the cell with multiple phenotypes].

Ileana Serghiescu, B Cârstocea

Oftalmologia (Bucharest, Romania : 1990)

|April 27, 2011

Summary

This summary is machine-generated.

Keratocytes are crucial for maintaining and repairing the transparent cornea. Understanding their phenotype changes aids in explaining corneal diseases and developing new therapies.

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Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis

Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis

Published on: May 16, 2020

Generation and Culturing of Primary Human Keratinocytes from Adult Skin

Generation and Culturing of Primary Human Keratinocytes from Adult Skin

Published on: December 22, 2017

Related Experiment Videos

Last Updated: Jun 2, 2026

Establishing a High Throughput Epidermal Spheroid Culture System to Model Keratinocyte Stem Cell Plasticity

Establishing a High Throughput Epidermal Spheroid Culture System to Model Keratinocyte Stem Cell Plasticity

Published on: January 30, 2021

Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis

Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis

Published on: May 16, 2020

Generation and Culturing of Primary Human Keratinocytes from Adult Skin

Generation and Culturing of Primary Human Keratinocytes from Adult Skin

Published on: December 22, 2017

Area of Science:

Ophthalmology
Cell Biology
Corneal Science

Context:

Keratocytes are essential corneal stromal cells responsible for tissue homeostasis.
These cells are involved in wound healing and tissue repair following corneal injury.
Understanding keratocyte behavior is critical for addressing corneal pathologies.

Purpose:

To highlight the pivotal role of keratocytes in corneal structure and repair.
To emphasize the importance of studying keratocyte phenotype changes.
To provide insights for developing novel therapeutic strategies for corneal diseases.

Summary:

Keratocytes are key players in maintaining corneal transparency and facilitating repair after injury.
Investigating alterations in keratocyte phenotype is vital for understanding corneal pathology.
This knowledge supports the development of advanced therapeutic interventions for corneal conditions.

Impact:

Enhances understanding of corneal diseases and wound healing mechanisms.
Provides a foundation for developing targeted therapies for corneal injuries and disorders.
Contributes to advancing regenerative medicine approaches in ophthalmology.