1 research outputs found
Accelerated Bone Regeneration by an Astaxanthin-Modified Antioxidant Aerogel through Relieving Oxidative Stress via the NRF2 Signaling Pathway
Bone regeneration of critical-sized bone defects (CSBDs)
with biomimetic
collagen-based aerogels remains a significant challenge due to the
oxidative stress on the microenvironment. The excessive oxidative
stress could induce apoptosis and dysfunction of host-derived cells.
Astaxanthin (ATX) exhibits excellent antioxidant ability to block
free radical chain reactions. In the present study, hybrid antioxidant
collagen-derived aerogels (ATX–Col aerogels) were fabricated
by a simple one-step method through the covalent cross-linking of
Col and ATX. The resulting ATX–Col aerogels show porous and
interconnected structures due to freeze-drying strategies. The ATX–Col
aerogels exhibited excellent biocompatibility and biosafety. Furthermore,
ATX–Col aerogels demonstrated favorable antioxidant capacity
by eliminating intracellular ROS by activating the NRF2 signaling
pathway. Finally, excellent reparative effects in repairing rat cranial
defects were observed in ATX–Col aerogels. Taken together,
ATX–Col aerogels can accelerate bone regeneration by relieving
oxidative stress via the NRF2 signaling pathway and act as a potential
bone graft for CSBD. This study provides a simple method of developing
antioxidant aerogels for bone regeneration