Objective:To observe the expression of PCNA and morphological changes of submandibular gland of db/db mutant diabetic mice.

• 目的:观察db/db自发性糖尿病小鼠颌下腺的病理形态学改变,增殖细胞核抗原(PCNA)在糖尿病小鼠颌下腺中的表达。