Collagen Association
Collagen Association - Related Videos
07:25
Collagen Hydrogels
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2023
Collagen is another widely used biomaterial that has found popularity in commercial applications, such as photography. Collagen has more recently been used in tissue engineering applications, by creating hydrogels that provide structure to engineered tissue. This video introduces collagen as a biomaterial, demonstrates how it is harvested from porcine skin, and shows how the material is used to create a hydrogel for tissue engineering applications. Finally, several applications of the material...
10:10
The Implicit Association Test
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2023
Source: Julian Wills & Jay Van Bavel—New York University One of the core constructs in social psychology is the notion of an attitude toward an object or person. Traditionally, psychologists measured attitudes by simply asking people to self-report their beliefs, opinions, or feelings. This approach has limitations, however, when measuring socially sensitive attitudes, like racial prejudice, because people are often motivated to self-report unprejudiced, egalitarian beliefs (despite...
07:03
Imaging Denatured Collagen Strands In vivo and Ex vivo via Photo-triggered Hybridization of Caged Collagen Mimetic Peptides
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Cited by 18 •
2014
This procedure demonstrates in vivo near IR fluorescence imaging of collagen remodeling activities in mice as well as ex vivo staining of collagens in tissue sections using caged collagen mimetic peptides that can be photo-triggered to hybridize with denatured collagen strands.
05:17
An Improved Method for the Preparation of Type I Collagen From Skin
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Cited by 23 •
2014
Traditional procedures for the isolation of soluble type 1 collagen (COL1) require about 10 days from start to finish because of lengthy buffer incubations and laborious resuspensions of fibrils. Here, we describe a means to purify COL1 from small dermal biopsies in less than 3 hr.
01:11
Fibril-associated Collagen
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2023
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...
FAQs
Once collagen polypeptide chains have formed a stable triple helix, the molecules can align through specific intermolecular interactions. This alignment creates fibrils, a higher-order arrangement that organizes many collagen molecules into a tissue-supporting framework. Enzymatic cross-linking can further stabilize the assembled fibrils, linking molecular organization to the structural integrity of connective-tissue matrices.
Specific intermolecular interactions determine how neighboring collagen molecules align after triple-helix formation. Their role is organizational: they help convert separate, already stabilized molecules into ordered fibrils. This distinction matters because triple-helix formation concerns the structure of individual collagen molecules, whereas association concerns how those molecules arrange together within an extracellular matrix.
Enzymatic cross-linking acts after collagen molecules have assembled into fibrils, adding stability to the existing molecular arrangement. Because cross-linking reinforces the association rather than creating the initial triple helix, it connects biochemical processing with the durability of connective-tissue architecture. Changes in this stabilization step can therefore alter matrix structure and tissue function.
Abnormal assembly or cross-linking can change the organization and mechanical behavior of collagen-containing tissues. If molecules do not associate appropriately, or if stabilization is altered, the resulting extracellular matrix may not provide its usual architecture or strength. This relationship helps explain why collagen-associated defects can affect tissue structure and function rather than only individual molecules.
Collagen association contributes to extracellular matrices in skin, bone, cartilage, tendons, and blood vessels. In each setting, organized fibrils help build tissue architecture on which mechanical properties depend, although the available information does not specify identical association patterns for every tissue. Comparing these sites connects molecular assembly with the varied structural roles of connective tissue.
The process is relevant to wound repair because rebuilding connective-tissue matrix requires organized collagen structures, not merely collagen polypeptide chains. Studying association can therefore relate molecular assembly and cross-linking to restoration of tissue architecture. It also provides a framework for examining disorders in which altered assembly or stabilization changes connective-tissue structure and function.