Dipeptidy1 peptidase-4 (DPP-4) inhibition suppresses the progression to hyperglycemia in low-dose streptozotocin (STZ)-induced diabetic mice via alleviation of β-cell death and α-cell proliferation (Dipeptidy1 peptidase-4 (DPP-4) 活性の阻害は,低用量streptozotocin (STZ) 誘発糖尿病マウスにおけるβ細胞死およびα細胞増殖を軽減し,高血糖への進展を抑制する。)