Composite biomaterials comprising polylactide(PLA)and hydroxyapatite(HA)are applied in bone,cartilage and dental regenerative medicine,where HA confers osteoconductive ***,after surgical implantation,adverse immune re...
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Composite biomaterials comprising polylactide(PLA)and hydroxyapatite(HA)are applied in bone,cartilage and dental regenerative medicine,where HA confers osteoconductive ***,after surgical implantation,adverse immune responses to these composites can occur,which have been attributed to size and morphology of HA *** to effectively modulate these adverse immune responses have not been *** degradation products have been shown to alter immune cell metabolism(immunometabolism),which drives the inflammatory ***,to modulate the inflammatory response to composite biomaterials,inhibitors were incorporated into composites comprised of amorphous PLA(aPLA)and HA(aPLA+HA)to regulate glycolytic *** at specific steps in glycolysis reduced proinflammatory(CD86+CD206-)and increased pro-regenerative(CD206+)immune cell populations around implanted aPLA+***,neutrophil and dendritic cell(DC)numbers along with proinflammatory monocyte and macrophage populations were decreased,and Arginase 1 expression among DCs was *** immunometabolism to control the proinflammatory response to biomaterial composites,thereby creating a pro-regenerative microenvironment,is a significant advance in tissue engineering where immunomodulation enhances osseointegration and angiogenesis,which could lead to improved bone regeneration.
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