Riboflavin Crosslinking
Riboflavin Crosslinking - Related Videos
05:09
A Riboflavin and UV Light Treatment of Platelet Products to Eliminate Bacteria
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2025
This video demonstrates the riboflavin and UV light-based pathogen reduction process against high-titer bacterial contamination in human platelet products. This process could help to lower the risk of severe adverse transfusion events associated with bacterial contamination.
10:32
Treatment of Platelet Products with Riboflavin and UV Light: Effectiveness Against High Titer Bacterial Contamination
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Cited by 19 •
2015
The storage conditions of platelet products create an ideal environment for bacterial contaminants to multiply to dangerous levels. The goal of this study was to use a colony forming assay to evaluate a riboflavin based pathogen reduction process against high titer bacterial contamination in human platelet products.
03:47
Crosslinking Neuronal Surface Proteins in the Mouse Brain using a Chemical Crosslinking Assay
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2025
This video demonstrates the crosslinking of neuronal surface proteins using Bis-sulfosuccinimidyl suberate or BS3. Isolated and chilled mouse brain is sectioned coronally. The desired region is extracted from the sections, minced, and treated with BS3. BS3 crosslinks surface proteins like GABA receptors, leaving internal proteins unaltered. The reaction is quenched with glycine before processing the samples for further analysis.
05:56
Scleral Cross-linking Using Riboflavin and Ultraviolet-A Radiation for Prevention of Axial Myopia in a Rabbit Model
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Cited by 27 •
2016
We demonstrate the effect of scleral crosslinking with riboflavin and UVA on an axial elongation rabbit eye. Axial elongation was induced in 13 day-old New Zealand rabbits (male and female) by suturing their right eye eyelids (tarsorrhaphy).
07:29
Three Different Protocols of Corneal Collagen Crosslinking in Keratoconus: Conventional, Accelerated and Iontophoresis
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Cited by 30 •
2015
Corneal collagen cross-linking (CXL) is the only conservative treatment currently available to halt keratoconus progression by improving the biomechanical rigidity of the corneal stroma. The aim of this manuscript is to highlight the methods of three different protocols of CXL: conventional CXL (C-CXL), accelerated CXL (A-CXL), and iontophoresis CXL (I-CXL).
FAQs
Riboflavin acts as a photosensitizer, meaning light activates it so it can generate reactive oxygen species. These reactive species promote covalent bonding between nearby collagen or polymer molecules. The resulting additional molecular connections create a more stable network, linking the photochemical event to changes in the mechanical behavior and degradation resistance of the treated tissue or biomaterial.
Covalent crosslinks form between molecules that are close enough to interact when reactive oxygen species are generated. This makes the existing arrangement of collagen or polymer molecules important to the final network structure. Where effective connections develop, the material can gain greater stiffness and mechanical stability, while the same molecular reinforcement can help it resist degradation.
The light source supplies the activation step that allows riboflavin to function as a photosensitizer. The overview identifies ultraviolet and visible light as relevant illumination ranges, so the selected light must support riboflavin activation. In bioengineering applications, this condition connects illumination with the formation of molecular bonds and the resulting strengthening of tissues, hydrogels, or scaffolds.
The underlying photochemical role of riboflavin remains similar, but the molecules receiving the added covalent connections differ. In collagenous tissue, crosslinks reinforce a biological protein network; in engineered materials, they can connect polymer molecules within hydrogels or scaffolds. This distinction allows the method to address both tissue stabilization and the design of mechanically stronger biomaterials.
A general workflow places riboflavin in contact with the target collagen or polymer network, then exposes the system to ultraviolet or visible light. Illumination activates the riboflavin and generates reactive oxygen species, which promote covalent connections between nearby molecules. After treatment, researchers evaluate whether the material has gained the intended mechanical stability, stiffness, or degradation resistance.
Corneal collagen crosslinking demonstrates how a light-activated chemical process can reinforce biological tissue rather than only an engineered material. Riboflavin-mediated photochemistry promotes additional connections within the collagen network, supporting greater tissue stability. Its importance in bioengineering comes from linking molecular-scale modification with a tissue-level strengthening strategy in a clinically relevant biological structure.
In hydrogels and scaffolds, riboflavin crosslinking can provide a light-activated way to increase network stability after the relevant polymers are assembled. Greater stiffness and resistance to degradation may help these materials maintain their structure during tissue repair or regenerative applications. The same strategy can also support biomaterial designs for drug delivery, where network properties influence material performance.