High glucose induces a metabolic memory in human periodontal ligament cells / 中国组织工程研究

ABSTRACT

BACKGROUND:Studies on high glucose exposure in human periodontal ligament cel s usual y focus on the biological behaviors, pathways and secretory factors, but whether the metabolic memory is involved is little known. OBJECTIVE:To investigate the metabolic memory of high glucose exposure in human periodontal ligament cel s. METHODS:Human periodontal ligament cel s were primarily cultured and identified. Cel s at 5-8 passages were selected and randomized into four groups. Group A (controls)DMEM containing 5.5 mmol/L glucose for 8 days;group B (5-day memory group)DMEM containing 35 mmol/L glucose for 3 days and DMEM containing 5.5 mmol/L glucose for 5 days;group C (3-day memory group)DMEM containing 35 mmol/L glucose for 5 days and DMEM containing 5.5 mmol/L glucose for 3 days;group D (8-day high glucose group)DMEM containing 35 mmol/L glucose for 8 days. The cel proliferation was detected by cel counting kit-8, the cel apoptosis was determined by flow cytometry, and the levels of total proteins and alkaline phosphatase were investigated using ELISA. RESULTS AND CONCLUSION:Compared with the control group, the cel proliferation in the other three groups was significantly reduced (P<0.05), the number of apoptotic cel s was significantly increased, while the levels of total proteins and alkaline phosphatase were significantly decreased (P<0.05). These results suggest that high glucose causes persistent changes in human periodontal ligament cel s by inhibiting cel viability, increasing the apoptosis and downregulating the levels of the total proteins and alkaline phosphatase