Video Experimental Relacionado

Updated: Jul 6, 2026

CUBIC Protocol Visualizes Protein Expression at Single Cell Resolution in Whole Mount Skin Preparations

CUBIC Protocol Visualizes Protein Expression at Single Cell Resolution in Whole Mount Skin Preparations

Published on: August 4, 2016

c-Jun y JunB controlan antagónicamente la interacción mesenquimal-epidermal regulada por citoquinas en la piel

A Szabowski¹, N Maas-Szabowski, S Andrecht

¹Division of Signal Transduction and Growth Control Deutsches Krebsforschungszentrum Im Neuenheimer Feld 280 69120, Heidelberg, Germany.

|December 15, 2000

Resumen

Los investigadores descubrieron que las subunidades AP-1 en los fibroblastos controlan antagónicamente el crecimiento y la diferenciación de las células de la piel. Esta interacción, regulada por IL-1, influye en la regeneración epidérmica y el equilibrio del tejido.

Área de la Ciencia:

Biología del desarrollo Biología del desarrollo.
La señalización celular.
Dermatología Dermatología dermatología.

Sus antecedentes:

Las interacciones de las células mesenquimales y epiteliales son cruciales para el desarrollo de los órganos y el mantenimiento de los tejidos.
Este intercambio celular se basa en proteínas de la superficie celular y factores solubles, a menudo controlados por la transcripción génica.
La familia AP-1 de factores de transcripción juega un papel en estos procesos celulares.

Objetivo del estudio:

Para investigar las funciones específicas de los dímeros del factor de transcripción AP-1 en la biología de la piel.
Comprender los mecanismos de señalización paracrina que controlan el comportamiento de los queratinocitos mediados por los fibroblastos.

Principales métodos:

Reconstitución de tejido cutáneo utilizando queratinocitos humanos primarios y fibroblastos de ratón genéticamente modificados (tipo salvaje, c-jun(-/-), junB(-/-)).
Análisis de la señalización paracrina mediada por fibroblastos que afecta la proliferación y diferenciación de los queratinocitos.
Investigación del papel de la interleucina-1 (IL-1) en la regulación de los factores clave de crecimiento.

Principales resultados:

Se identificó una función antagónica entre las subunidades AP-1 c-Jun y JunB dentro de los fibroblastos.
Se demostró que este antagonismo afecta el control mediado por fibroblastos de la proliferación y diferenciación de los queratinocitos.
Rastreó el mecanismo a la regulación dependiente de IL-1 del factor de crecimiento de queratinocitos (KGF) y el factor estimulante de colonias de granulocitos-macrófagos (GM-CSF).

Conclusiones:

La activación relativa de las subunidades AP-1 en los fibroblastos dirige la regeneración epidérmica.
La regulación no celular autónoma por las subunidades AP-1 es esencial para mantener la homeostasis del tejido cutáneo.
La actividad específica del dímer AP-1 influye en la producción de factores paracrinos que gobiernan el comportamiento de las células epiteliales.

Más Videos Relacionados

A Simplified and Efficient Method to Isolate Primary Human Keratinocytes from Adult Skin Tissue

A Simplified and Efficient Method to Isolate Primary Human Keratinocytes from Adult Skin Tissue

Published on: August 25, 2018

Y-27632 Enriches the Yield of Human Melanocytes from Adult Skin Tissues

Y-27632 Enriches the Yield of Human Melanocytes from Adult Skin Tissues

Published on: July 8, 2020

Videos de Conceptos Relacionados

MAPK Signaling Cascades

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...

The JAK-STAT Signaling Pathway

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...

TGF - β Signaling Pathway

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...

Cell-matrix's Response to Mechanical Forces

Cell-matrix's Response to Mechanical Forces

In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...

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,...

Role of Skin in Vitamin D Synthesis

Role of Skin in Vitamin D Synthesis

The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).