Expressions of coordinated stimulating molecular programmed death 1 and its ligand 1 in brain glioma and their clinical significances

Abstract

Objective To analyze the expressions of coordinated stimulating molecular programmed death 1(PD-1) and programmed death ligand 1 (PD-L1) in human glioma and their clinical significances. Methods A total of 70 postoperative paraffin specimens of brain glioma and 35 normal brain tissues in Heji Hospital Affiliated to Changzhi Medical College from January 2013 to December 2017 were collected. The expressions of PD-1 and PD-L1 in 70 glioma tissues and 35 normal brain tissues were detected by immunohistochemical SP method. The relationship between the expressions of PD-1 and PD-L1 and their correlation with the clinicopathological features were analyzed. Results The positive expression rates of PD-1 and PD-L1 in glioma tissues were 69% (48/70) and 62% (43/70), respectively, which were higher than those in normal brain tissues [29% (10/35), 31% (11/35)], the differences were statistically significant (χ2 values were 15.099 and 8.407, both P 0.05). There was a positive correlation between the expressions of PD-1 and PD-L1 proteins in glioma tissues (r= 0.372, P= 0.002). Conclusions The PD-1 and PD-L1 may become new biological indicators for evaluating the occurrence and development of glioma. Key words: Brain neoplasms; Glioma; Programmed death 1; Programmed death ligand 1; Immunohistochemistry