Video Experimental Relacionado
Updated: Jun 21, 2026
13:36
Synthetic Spider Silk Production on a Laboratory Scale
Published on: July 18, 2012
La fibulina-5/DANCE es esencial para la elastogénesis in vivo
Tomoyuki Nakamura1, Pilar Ruiz Lozano, Yasuhiro Ikeda
1UCSD-Salk Program in Molecular Medicine and the UCSD Institute of Molecular Medicine, University of California, San Diego, La Jolla, California 92093, USA.
Nature
|January 24, 2002
Resumen
La fibulina-5 es crucial para organizar las fibras elásticas, esenciales para la función de las arterias, los pulmones y la piel. Los ratones que carecen de fibulina-5 muestran fibras elásticas desorganizadas, lo que lleva a daños en los tejidos y enfermedades.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Biología del desarrollo Biología del desarrollo.
- Biología celular Biología celular.
Sus antecedentes:
- Las fibras elásticas son vitales para la elasticidad de los tejidos en órganos como las arterias, los pulmones y la piel.
- El ensamblaje y el desarrollo de las fibras elásticas, compuestas de microfibras y elastina, no se comprenden completamente.
Objetivo del estudio:
- Investigar el papel de la fibulina-5 (DANCE) en la organización de las fibras elásticas.
- Determinar la función de la fibulina-5 en el desarrollo y mantenimiento de los tejidos elásticos.
Principales métodos:
- La orientación genética en ratones para crear modelos de nocaut de fibulina-5 (fibulina-5-/-).
- Estudios in vitro para evaluar las interacciones de la fibulina-5 con fibras elásticas e integrinas.
- Análisis histológico y funcional de tejidos de fibulina-5-/- de ratones.
Principales resultados:
- Los ratones knockout de fibulina-5 exhiben fibras elásticas severamente desorganizadas en todo el cuerpo.
- Estos ratones muestran anormalidades aórticas, enfisema y cutis laxa, lo que indica un desarrollo defectuoso de la fibra elástica.
- La fibulina-5 interactúa directamente con las fibras elásticas y se une a las integrinas alphavbeta3, alphavbeta5 y alpha9beta1.
Conclusiones:
- La fibulina-5 es un determinante esencial de la organización y estabilidad de las fibras elásticas.
- Puede funcionar anclando fibras elásticas a las células a través de interacciones de integrina.
- Los defectos en la fibulina-5 conducen a un deterioro de la estructura y función del tejido elástico, lo que contribuye a diversas patologías.
Videos de Conceptos Relacionados
02:21Globular and Fibrous Proteins
Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
01:14Generation of Straight or Branched Actin Filaments
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
02:21Globular and Fibrous Proteins
Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
01:13Collagens are the Major Structural Proteins of ECM
Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
Connective tissue proper includes loose...
Connective tissue proper includes loose...
01:12Elastin is Responsible for Tissue Elasticity
Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
00:55Fibrous Proteins
Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...