External Stimuli-Responsive Strategies for Surface Modification of Orthopedic Implants: Killing Bacteria and Enhancing Osteogenesis

Liu, Xujie; Feng, Zhenzhen; Ran, Zhili; Zeng, Yaoxun; Cao, Guining; Li, Xinyi; Ye, Huiling; Wang, Meijing; Liang, Wanting; He, Yan

doi:10.1021/acsami.3c19149

Cited by 2 publications

(1 citation statement)

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“…The ideal artificial ligament ought to not only foster osteogenic activity for promoting bone regeneration but also possess the capacity to suppress osteoclasts for inhibiting bone resorption . Additionally, the implantation of any implant into the human body inherently carries the risk of bacterial infection . Consequently, developing effective strategies to minimize the risk of infection associated with implants is equally imperative.…”

Section: Introductionmentioning

confidence: 99%

Phytic Acid-Gallium Network on a Polyimide Fiber Woven Fabric as an Artificial Ligament for Boosting Ligament–Bone Healing and Infection Treatment

Xie,

Mei,

Xie

et al. 2024

ACS Appl. Mater. Interfaces

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The development of an artificial ligament with a multifunction of promoting bone formation, inhibiting bone resorption, and preventing infection to obtain ligament−bone healing for anterior cruciate ligament (ACL) reconstruction still faces enormous challenges. Herein, a novel artificial ligament based on a PI fiber woven fabric (PIF) was fabricated, which was coated with a phytic acid-gallium (PA-Ga) network via a layer-by-layer assembly method (PFPG). Compared with PIF, PFPG with PA-Ga coating significantly suppressed osteoclastic differentiation, while it boosted osteoblastic differentiation in vitro. Moreover, PFPG obviously inhibited fibrous encapsulation and bone absorption while accelerating new bone regeneration for ligament−bone healing in vivo. PFPG remarkably killed bacteria and destroyed biofilm, exhibiting excellent antibacterial properties in vitro as well as anti-infection ability in vivo, which were ascribed to the release of Ga ions from the PA-Ga coating. The cooperative effect of the surface characteristics (e.g., hydrophilicity/surface energy and protein absorption) and sustained release of Ga ions for PFPG significantly enhanced osteogenesis while inhibiting osteoclastogenesis, thereby achieving ligament−bone integration as well as resistance to infection. In summary, PFPG remarkably facilitated osteoblastic differentiation, while it suppressed osteoclastic differentiation, thereby inhibiting osteoclastogenesis for bone absorption while accelerating osteogenesis for ligament−bone healing. As a novel artificial ligament, PFPG represented an appealing option for graft selection in ACL reconstruction and displayed considerable promise for application in clinics.

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Section: Introductionmentioning

confidence: 99%