miRNA expression during BMSCs from human jaw in Type 2 diabetics.

The association between T2 DM and BMSCs osteogenic differentiation has been documented in experimental settings. We examine miRNA expression specific for BMSCs from human jaw in Type 2 diabetics. 3 Type 2 diabetes (T2 DM) and 3 non-T2DM were enrolled. All basic information, including age, sex, general health condition, DM type, implant system and implant position, was matched to avoid the influence of other factors. According to the ICSI (Institute for Clinical Systems Improvement) guideline for T2DM in adults, the glycemic control standard for T2DM in this study was HbA1c less than 8%. The match for each T2DM patient was completed immediately after the implant surgery. Implant sites were left to heal for at least three months after tooth extraction. Subjects with implants inserted with guided bone regeneration were excluded from the study. Patients with contraindications for implant surgery, such as cardiovascular disorders, renal diseases or uncontrolled periodontitis, were excluded. The STROBE (Strengthening the Reporting of Observational studies in Epidemiology) guidelines were followed to ensure the rigor of our study. Bone chips were harvested during implant socket preparation and were reserved in phosphate-buffered saline (Gibco, Grand Island, NY, USA) with antibiotics (10,000 U/ml penicillin and 10 mg/ml streptomycin; Gibco). After being centrifuged at 1,100 rpm, the bone chips were resuspended in mesenchymal stem cell medium (MSCM; ScienCell, Carlsbad, CA, USA), then seeded in dishes, and cultured in a humidified cell incubator with 5% CO2 at 37°C without movement for seven days. A 70-μm pore-size strainer (Falcon, BD Labware, Wilmington, DE, USA) was used to obtain single-cell suspensions, which were then cultured in MSCM. The medium was replaced every three days. The fourth-passage BSCMs were used for subsequent experiments.