RESUMEN
OBJECTIVE: This study aims to explore the correlation of oxidative stress (OxS) in patients with chronic hepatitis B (CHB) and the disease severity with HBV genotypes and drug resistance mutations. METHODS: A total of 296 patients with CHB were enrolled into the study. PCR-reverse dot-blot hybridization was used to detect the HBV genotypes (B, C, and D) and the drug resistance-causing HBV mutant genes. In addition, the total oxidative stress (TOS) and total antioxidant status (TAS) were determined, and oxidative stress index (OSI) was calculated and compared. RESULTS: Serum levels of TOS and OSI, the B/C ratio, and drug resistance mutation rate were increased along with the elevated disease severity degree (CHBAsunto(s)
Farmacorresistencia Viral
, Genotipo
, Virus de la Hepatitis B/genética
, Hepatitis B
, Mutación
, Estrés Oxidativo
, Adulto
, Femenino
, Hepatitis B/sangre
, Hepatitis B/tratamiento farmacológico
, Hepatitis B/genética
, Humanos
, Masculino
, Persona de Mediana Edad
RESUMEN
Magnesium alloys as biodegradable metal implants have received a lot of interest in biomedical applications. However, magnesium alloys have extremely high corrosion rates a in physiological environment, which have limited their application in the orthopedic field. In this study, calcium phosphate compounds (Ca-P) coating was prepared by arginine-glycine-aspartic acid-cysteine (RGDC) peptide-induced mineralization in 1.5 simulated body fluid (SBF) to improve the corrosion resistance and biocompatibility of the AZ31 magnesium alloys. The adhesion of Ca-P coating to the AZ31 substrates was evaluated by a scratch test. Corrosion resistance and cytocompatibility of the Ca-P coating were investigated. The results showed that the RGDC could effectively promote the nucleation and crystallization of the Ca-P coating and the Ca-P coating had poor adhesion to the AZ31 substrates. The corrosion resistance and biocompatibility of the biomimetic Ca-P coating Mg alloys were greatly improved compared with that of the uncoated sample.