Association Of The Glycemic Fluctuation As Well As Glycemic Control With The Pancreatic Beta-Cell Function In Japanese Subjects With Type 2 Diabetes Mellitus

Objective It is important to preserve the pancreatic beta-cell function in order to maintain good glycemic control for a long period. The aim of this study was to examine which factors are associated with the beta-cell function in subjects with type 2 diabetes mellitus.Methods A total of 372 subjects with type 2 diabetes who had been hospitalized for the amelioration of their glycemic control and/or education about diabetes in Kawasaki Medical School Hospital were included in this study. We evaluated the remnant beta-cell function as the HOMA-%beta using the computer software program HOMA2 and estimated the glycemic fluctuation with the glycoalbumin (GA)/hemoglobin Ale (HbAlc) ratio. In addition, we divided the subjects into a relatively young group (<65 years old) (n=210) and an elderly group (>= 65 years old) (n=162) and performed several analyses in each group.Results The GA/HbAlc ratio, GA and HbAlc were independent determinant factors for the HOMA-%beta regardless of age. We obtained almost the same results even after excluding those subjects using insulin secretagogues. These data suggest that the glycemic fluctuation and glycemic control are associated with the remnant beta-cell function in Japanese subjects with type 2 diabetes.Conclusion It is very important to reduce glycemic fluctuation as well as to maintain good glycemic control in order to preserve beta-cell function in subjects with type 2 diabetes.