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- W2082427266 abstract "Almost all biomaterial implants are surrounded by a fibrotic capsule, although the mechanism of biomaterial-mediated fibrotic reactions is mostly unclear. To search for the types of cells responsible for triggering the tissue responses, we used poly-L glycolic acid polymers capable of releasing various reagents. We first identified that CD45+/Collagen 1+ fibrocytes are recruited and resided within the fibrotic capsule at the implant interface. Interestingly, we found that the recruitment of fibrocytes and the extent of fibrotic tissue formation (collagen type I production) were substantially enhanced and reduced by the localized release of compound 48/80 and cromolyn, respectively. Since it is well established that compound 48/80 and cromolyn alter mast cell reactions, we hypothesized that mast cells are responsible for triggering fibrocyte recruitment and subsequent fibrotic capsule formation surrounding biomaterial implants. To directly test this hypothesis, similar studies were carried out using mast cell deficient mice, WBB6F1/J-KitW/KitW-v/, and their congenic controls. Indeed, mast cell deficient mice prompted substantially less fibrocyte and myofibroblast responses in comparison to C57 wild type mice controls. Most interestingly, subcutaneous mast cell reconstitution of WBB6F1/J-KitW/KitW-v/J mice almost completely restored the fibrocyte response in comparison to the C57 wild type response. These results indicate that the initial biomaterial interaction resulting in the stimulation of mast cells and degranulation byproducts not only stimulates the inflammatory cascade but significantly alters the downstream fibrocyte response and degree of fibrosis." @default.
- W2082427266 created "2016-06-24" @default.
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- W2082427266 date "2011-11-01" @default.
- W2082427266 modified "2023-10-17" @default.
- W2082427266 title "The pivotal role of fibrocytes and mast cells in mediating fibrotic reactions to biomaterials" @default.
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- W2082427266 doi "https://doi.org/10.1016/j.biomaterials.2011.07.084" @default.
- W2082427266 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3176925" @default.
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