Redox signaling induces laminin receptor ribosomal protein-SA expression to improve cell adhesion following radiofrequency glow discharge treatments

Abstract

Current biomaterials effectively replace biological structures but are limited by infections and long-term material failures. This study examined the molecular mechanisms of radio frequency glow discharge treatments (RFGDT) in mediating the disinfection of biomaterial surfaces and concurrently promoting cell attachment and proliferation. Dental biomaterials were subjected to RFGDT, and viability of oral microbial species, namely Streptococcus mutants (SM), Streptococcus gordonii (SG), Moraxella catarrhalis (MC), and Porphyromonas gingivalis (PG), were assessed. Cell attachment and survival of a pre-odontoblast cell line, MDPC-23, was examined. Finally, mechanistic investigations into redox generation and biological signaling were investigated. Based on their compositions, dental biomaterials induced reactive oxygen species (ROS) following dose-dependent RFGDT. Reduced microbial viability was evident following RFGDT in the catalase-negative (SM and SG) species more prominently than catalase-positive (MC and PG) species. Cell adhesion assays noted improved MDPC-23 attachment and survival. Pretreatments with N-acetylcysteine (NAC) and catalase abrogated these responses. Immunoassays noted redox-induced downstream expression of a laminin receptor, Ribosomal Protein SA, following RFGDT. Thus, RFGDT-induced redox mediates antimicrobial and improves cell responses such as adhesion and proliferation. These observations together provide a mechanistic rationale for the clinical utility of RFGDT with dental biomaterials for regenerative clinical applications.

Recent Advancements in Surface Modification, Characterization and Functionalization for Enhancing the Biocompatibility and Corrosion Resistance of Biomedical Implants

“…In a study, Ponnusamy et al [93] investigated the molecular processes by which radio frequency glow discharge treatments (RFGDT) mediate the sanitization of biomaterial interfaces while also fostering cell adhesion and multiplication. Dentistry biomaterials were Yuvaraj et al [92] used a DC moderate temperature plasma-based approach to successfully incorporate nano-carbon onto the interface of chemically generated nano-HA.…”

“…In a study, Ponnusamy et al [93] investigated the molecular processes by which radio frequency glow discharge treatments (RFGDT) mediate the sanitization of biomaterial interfaces while also fostering cell adhesion and multiplication. Dentistry biomaterials were put through the RFGDT, and oral microbial organisms, including Streptococcus mutants (SM), Moraxella catarrhalis (MC), Streptococcus gordonii (SG), and Porphyromonas gingivalis (PG), were tested for vitality.…”