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N-Acetyl Cysteine as a Novel Polymethyl Methacrylate Resin Component: Protection against Cell Apoptosis and Genotoxicity.
Zhang, Yu; Xiao, Jian-Feng; Yang, He-Feng; Jiao, Yang; Cao, Wei-Wei; Shi, Huan-Min; Cun, Jing-Fen; Tay, Franklin R; Ping, Jie; Xiao, Yu-Hong.
Afiliación
  • Zhang Y; The Affiliated Stomatological Hospital of Kunming Medical University, Kunming, China.
  • Xiao JF; The Affiliated Stomatological Hospital of Kunming Medical University, Kunming, China.
  • Yang HF; The Affiliated Stomatological Hospital of Kunming Medical University, Kunming, China.
  • Jiao Y; Department of Stomatology, The 7th Medical Center of PLA General Hospital, Beijing, China.
  • Cao WW; Freetech Technology, Nanjing, China.
  • Shi HM; The Affiliated Stomatological Hospital of Kunming Medical University, Kunming, China.
  • Cun JF; The Affiliated Stomatological Hospital of Kunming Medical University, Kunming, China.
  • Tay FR; Department of Endodontics, The Dental College of Georgia, Augusta University, Augusta, GA, USA.
  • Ping J; Department of Medical Administration, The 7th Medical Center of PLA General Hospital, Beijing, China.
  • Xiao YH; Department of Stomatology, 920th Hospital of Joint Logistics Support Force, Kunming, China.
Oxid Med Cell Longev ; 2019: 1301736, 2019.
Article en En | MEDLINE | ID: mdl-31636802
ABSTRACT
The present study investigated the antiapoptotic and antigenotoxic capabilities of N-acetyl cysteine- (NAC-) containing polymethyl methacrylate (PMMA) resin. An in vitro Transwell insert model was used to mimic the clinical provisional restorations placed on vital teeth. Various parameters associated with cell apoptosis and genotoxicity were investigated to obtain a deeper insight into the underlying mechanisms. The exposure of human dental pulp cell (hDPC) cultures to the PMMA resin (Unifast Trad™) resulted in a rapid increase in reactive oxygen species (ROS) level beginning at 1 h, which was followed by time-dependent cell detachment and overt death. The formation of γ-H2AX and cell cycle G1 phase arrest indicated that oxidative DNA damage occurred as a result of the interactions between DNA bases and ROS, beyond the capacities of cellular redox regulation. Such oxidative DNA damage triggers the activation of p53 via the ataxia telangiectasia mutated (ATM) signaling pathway and the induction of intrinsic mitochondrial apoptosis. Oxidative stress, cell apoptosis, and DNA damage induced by the PMMA resin were recovered to almost the level of untreated controls by the incorporation of NAC. The results indicate that the PMMA resin induced the intrinsic mitochondrial apoptosis as a consequence of p53 activation via the ATM pathway in response to oxidative DNA damage. More importantly, the incorporation of NAC as a novel component into the Unifast Trad™ PMMA resin offers protective effects against cell apoptosis and genotoxicity. This procedure represents a beneficial strategy for developing more biocompatible PMMA-based resin materials.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Acetilcisteína / Apoptosis / Pruebas de Mutagenicidad Límite: Adolescent / Adult / Humans Idioma: En Revista: Oxid Med Cell Longev Asunto de la revista: METABOLISMO Año: 2019 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Acetilcisteína / Apoptosis / Pruebas de Mutagenicidad Límite: Adolescent / Adult / Humans Idioma: En Revista: Oxid Med Cell Longev Asunto de la revista: METABOLISMO Año: 2019 Tipo del documento: Article País de afiliación: China