Video Experimental Relacionado
Updated: May 5, 2026

10:13
Micropatterned Surfaces to Study Hyaluronic Acid Interactions with Cancer Cells
Published on: December 23, 2010
14.6K
CD44 es el principal receptor de superficie celular para el hialuronato
A Aruffo1, I Stamenkovic, M Melnick
1Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115.
Cell
|June 29, 1990
Resumen
La proteína de la superficie celular CD44 se une al hialuronato, un componente clave de la matriz extracelular. Esta interacción es crucial para la fijación celular y es sensible a la digestión de la hialuronidasa.
Área de la Ciencia:
- Inmunología Inmunología.
- Biología celular Biología celular.
- Glucobiología Glucobiología.
Sus antecedentes:
- CD44 es una glicoproteína de la superficie celular involucrada en la adhesión celular.
- Su papel en la mediación del apego a los componentes de la matriz extracelular está bien establecido.
Objetivo del estudio:
- Para investigar la interacción de CD44 con el hialuronato.
- Para caracterizar las propiedades de unión de las proteínas de fusión CD44-inmunoglobulina solubles.
Principales métodos:
- Creación y caracterización de las proteínas de fusión CD44-inmunoglobulina solubles.
- Los ensayos utilizan secciones de tejido y células endotelial altas de cultivo primario.
- Digestión enzimática con hialuronidasa y estudios de inhibición con glicosaminoglicanos.
Principales resultados:
- Las proteínas de fusión CD44 solubles se unen a las secciones de tejido y a las células endoteliales altas de los ganglios linfáticos.
- La unión a CD44 es sensible a la hialuronidasa, lo que indica que el hialuronato es un ligando.
- La unión es inhibida por el hialuronato y los sulfatos de condroitina.
Conclusiones:
- CD44 funciona como un receptor para el hialuronato en las células endoteliales.
- Esta interacción es importante para la adhesión celular en varios tejidos, incluidos los ganglios linfáticos.
Más Videos Relacionados
Videos de Conceptos Relacionados
Receptor-mediated Endocytosis
105.5K
Overview
105.5K
Matrix Proteoglycans and Glycoproteins
4.3K
Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
4.3K
Structure of Cadherins
4.0K
The cadherins were one of the first cell adhesion molecules discovered; the term “cadherins” is based on their calcium-dependent adhering properties. The first cadherins discovered on the epithelial, neuronal, and placental cells were named E-cadherin, P-cadherin, and N-cadherin, respectively. These classical cadherins share sequence and structural similarities. Other cadherins, including those involved in cell signaling, are grouped into non-classical cadherins. This...
4.0K
Selectins
3.6K
Cell adhesion is an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain,...
3.6K
Immunoglobulin-like Cell Adhesion Molecules
3.3K
Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
3.3K
T Cell Activation and Clonal Selection
13.7K
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
13.7K

