Expression and correlation of cell cycle protein-D1 and Ki-67 in laryngeal cancer tissues

Objective To investigate the expression and correlation of cell cycle protein-D1 and Ki-67 in laryngeal cancer tis-sues.Methods Immunohistochemical streptavidin-perosidase （ SP） staining method was used to detect the expression of Cyclin D 1 and Ki-67 proteins in laryngeal squamous cell carcinoma tissues and their correlation between Cyclin D 1 and Ki-67 was analyzed .Re-sults Among 56 cases of Cyclin D1 positive over-expressed laryngeal squamous cell carcinoma tissues , 41 cases of Ki-67 had positive over-expression.Among 51 cases of Ki-67 low-expressed tissues, 35 cases of Cyclin D1 had low-expression.Spearman rank correlation test showed that expressions of Cyclin D 1 and Ki-67 in laryngeal squamous cell carcinoma tissues had a significant positive correlation （ rs =0.620, P 〈0.01）.Conclusions Cyclin D1 and Ki-67 expressions in laryngeal squamous cell carcinoma have a significantly positive correlation . Key words: Ki-67 antigen; Laryngeal neoplasms; Carcinoma,squamous cell