Video Experimental Relacionado
Updated: Jan 9, 2026

08:49
Cultivating a Three-dimensional Reconstructed Human Epidermis at a Large Scale
Published on: May 28, 2021
12.7K
Heterogeneidad en los queratinocitos basales epidérmicos: correlaciones morfológicas y funcionales
Resumen
Se encontraron dos tipos de queratinocitos basales, no serrados y serrados, en la epidermis de las palmas de los primates. Las células no serradas pueden ser células madre, mientras que las células serradas anclan la epidermis a la dermis.
Área de la Ciencia:
- Dermatología Dermatología dermatología.
- Biología celular Biología celular.
- Estructura epidérmica La estructura epidérmica es la estructura de la epidermis.
Sus antecedentes:
- La epidermis proporciona una barrera protectora, confiando en los queratinocitos basales para la renovación y la integridad estructural.
- Comprender la heterogeneidad de los queratinocitos es crucial para comprender el desarrollo epidérmico y la cicatrización de heridas.
Objetivo del estudio:
- Identificar y caracterizar distintas poblaciones de queratinocitos basales en la epidermis de las palmas de los primates.
- Investigar los roles potenciales de estas poblaciones en la estructura y función epidérmica.
Principales métodos:
- Análisis comparativo de la morfología de los queratinocitos basales en el mono cynomolgus y la epidermis de la palma de la mano humana.
- Evaluación de las características estructurales finas y las propiedades cinéticas de las poblaciones celulares identificadas.
Principales resultados:
- Descubrimiento de dos poblaciones distintas de queratinocitos basales: sin serrado y serrado.
- Las células no seradas exhiben características sugerentes de células madre.
- Las células serradas poseen características que indican un papel en el anclaje de la epidermis a la dermis.
Conclusiones:
- La epidermis de la palma contiene al menos dos poblaciones de queratinocitos basales funcionalmente distintas.
- Es probable que los queratinocitos no cerrados sirvan como células madre epidérmicas.
- Los queratinocitos serrados contribuyen a la adhesión epidérmico-dérmica.
Videos de Conceptos Relacionados
Renewal of Skin Epidermal Stem Cells
3.0K
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...
3.0K
Cells of the Epidermis
6.6K
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...
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...
6.6K
Layers of the Epidermis
7.6K
The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows:
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
7.6K
Classification of Epithelial Tissues: Overview
19.5K
Epithelial tissues are classified according to the shape of the cells and the number of cell layers formed. Cell shapes can be squamous (flattened and thin), cuboidal (square-like, as wide as it is tall), or columnar (rectangular, taller than it is wide). Additionally, the nucleus shape helps identify the type of epithelial cells. Squamous cells have flattened disc-shaped nuclei, cuboidal cells have spherical nuclei, and columnar cells have elongated nuclei.
Based on the number of cell layers,...
Based on the number of cell layers,...
19.5K
Clinical Applications of Epidermal Stem Cells
3.2K
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...
3.2K
Classification of Epithelial Tissues: Stratified Epithelium
12.4K
Stratified epithelium consists of several stacked layers of cells. They provide the durability to withstand constant physical and chemical attacks. Stratified epithelium is named after the shape of the most apical layer of cells. Stratified squamous epithelium is the most common type found in the human body. In this tissue, the apical cells are squamous, whereas the basal layer contains either columnar or cuboidal cells. The basal cells divide to form new daughter cells, which gradually become...
12.4K

