MXene-modified 3D printed scaffold for photothermal therapy and facilitation of oral mucosal wound reconstruction. (March 2023)

• Record Type: Journal Article
• Authors: Luo, Rui; Li, Fengji; Wang, Yanan; Zou, Huiru; Shang, Jianwei; Fan, Yaru; Liu, Han; Xu, Zhaoyuan; Li, Ruixin; Liu, Hao
• Is Part Of: Materials & design. Volume 227(2023)
• Publication Date: 2023-03
• Subjects: Photothermal therapy -- Tissue engineering -- MXene -- Oral squamous cell carcinoma; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2023.111731
• Languages: English
• ISSNs: 0264-1275

Abstract

Graphical abstract: A biomaterial that can remove remaining oral squamous cell carcinoma (OSCC) cells and repair oral mucosal damage is urgently needed. This graphical abstract described a composite scaffold that would simultaneously kill OSCC cells and promote the regeneration of the oral mucosa. Highlights: Quercetin acts as an inhibitor when heat shock proteins make tumor cells more resistant to photothermal therapy. Ti3 C2 MXene and quercetin are effectively carried by scaffold made of collagen and silk fibroin. The composite scaffold successfully limits tumor cells migration and promotes oral mucosal defects regeneration. Abstract: The most prevalent oral and maxillofacial cancer is oral squamous cell carcinoma (OSCC). Patient survival is compromised by relapse due to post-operative tumor remnants and significant mucosal defects. Photothermal therapy (PTT) is used to ablate local malignancies, but the capacity of tumor cells to resist it is correlated with the overexpression of heat shock protein 70 (HSP70). In this work, PTT and tissue engineering scaffold were rationally integrated to construct a Ti3 C2 MXene, collagen, silk fibroin and quercetin composite scaffold (M-CSQ scaffold), a 3D printed biomaterial that simultaneously kill OSCC cells and promote the regeneration of the mucosal defects. The M-CSQ scaffolds were prepared by cryogenic 3D printing and freeze-drying techniques with sufficient pores that allow an abundant cell migration and provide a proliferation space. Ti3 C2 MXene has excellent photothermal conversion ability and stability. Quercetin targeted HSP70 to decrease its expression in OSCC cells, consequently weakening their resistance to high temperature and enhancing the effect of PTT. The M-CSQ scaffold effectively killed OSCC cells in vitro and inhibited tumor growth in vivo . In addition, the M-CSQ scaffold provided adhesion sites for Sprague-Dawley rat (SD rat) buccal mucosal fibroblasts and promoted the repair of buccal mucosal wounds.