Video Experimental Relacionado
Updated: May 4, 2026
06:04
Murine Dermal Fibroblast Isolation by FACS
Published on: January 7, 2016
21.4K
Distintos linajes de fibroblastos determinan la arquitectura dérmica en el desarrollo y la reparación de la piel
Ryan R Driskell1,2, Beate M Lichtenberger1,2, Esther Hoste3,2
1Wellcome Trust Centre for Stem Cell Research, University of Cambridge, Cambridge CB2 1QR, UK.
Nature
|December 17, 2013
Resumen
Los fibroblastos de la piel se originan a partir de dos linajes distintos que forman la dermis superior e inferior. Estos linajes tienen funciones específicas en la estructura de la piel, la formación de folículos pilosos y la cicatrización de heridas, influyendo en el desarrollo del tejido cicatricial.
Área de la Ciencia:
- Biología celular Biología celular.
- Dermatología Dermatología dermatología.
- Biología del desarrollo Biología del desarrollo.
Sus antecedentes:
- Los fibroblastos son células clave del tejido conectivo responsables de la deposición de la matriz extracelular (MEC).
- La diversidad funcional de los fibroblastos dentro de los tejidos sugiere posibles jerarquías de diferenciación o respuestas ambientales.
- Comprender los orígenes de los fibroblastos es crucial para comprender el desarrollo y la reparación de los tejidos.
Objetivo del estudio:
- Para investigar los orígenes del linaje de los fibroblastos de la piel.
- Para determinar si la diversidad de los fibroblastos surge de distintas vías de diferenciación.
- Para aclarar los roles de los diferentes linajes de fibroblastos en la estructura de la piel y la cicatrización de heridas.
Principales métodos:
- Pruebas de trasplante en ratones.
- Estudios de rastreo de linaje en ratones.
- Análisis de las vías de señalización epidérmica (activación de la β-catenina).
Principales resultados:
- Los fibroblastos de la piel surgen de dos linajes distintos: el dermal superior y el dermal inferior.
- El linaje superior contribuye a la papilla dérmica y la formación del folículo piloso.
- El linaje inferior forma la dermis reticular, produciendo ECM, e incluye células hipodérmicas.
- La cicatrización de heridas implica el reclutamiento secuencial de linajes de fibroblastos, con la participación del linaje superior durante la reepitelización.
- La activación epidérmica de la β-catenina promueve la expansión del linaje dérmico superior, lo que permite la regeneración del folículo piloso en las heridas.
Conclusiones:
- La diversidad de fibroblastos en la piel está impulsada por orígenes de linaje distintos.
- Estos linajes juegan papeles específicos y no superpuestos en el desarrollo de la piel, el crecimiento del cabello y la reparación de heridas.
- Los hallazgos explican la formación de tejido cicatricial sin pelo después de una herida y proporcionan una base para estudiar los roles de los fibroblastos en el envejecimiento y la enfermedad.
Videos de Conceptos Relacionados
01:09Introduction to Fibroblasts
3.9K
Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
3.9K
01:12Renewal of Skin Epidermal Stem Cells
2.4K
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...
2.4K
01:15Reticular Dermis
4.6K
The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
4.6K
01:11Papillary Dermis
5.8K
Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
5.8K
01:06Multipotency and Niche of Bulge Stem Cell
2.9K
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...
2.9K
01:11Fibril-associated Collagen
2.7K
Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
2.7K