Expression and clinical significance of forkhead transcription factor O1 in diffuse large B-cell lymphoma / 白血病·淋巴瘤

ABSTRACT

Objective:To investigate the correlation of the expression of forkhead transcription factor O1 (FOXO1) with clinicopathological features and the prognosis in patients with diffuse large B-cell lymphoma (DLBCL).Methods:The data of 42 patients newly diagnosed with DLBCL in Hebei General Hospital admitted from June 2012 to January 2020 were collected. The expressions of FOXO1, phosphorylated FOXO1 (p-FOXO1) in DLBCL tissues were detected by using immunohistochemistry. The association of FOXO1 expression with clinicopathological features and the prognosis in DLBCL patients was retrospectively analyzed.Results:The positive rate of FOXO1 was 42.9% (18/42) and the positive rate of p-FOXO1 was 28.6% (12/42) in DLBCL tissues. There were no statistically significant differences in the positive rates of FOXO1 and p-FOXO1 among patients stratified by gender, age, Ann Arbor staging, immunophenotype, Eastern Cooperative Oncology Group score, lactate dehydrogenase, international prognostic index, β 2-microglobulin (β 2-MG) and primary sites (all P > 0.05). The positive rate of FOXO1 in patients with non-B symptoms was higher than that in those with B symptoms [53.6% (15/28) vs. 21.4% (3/14), χ2=3.938, P=0.047], and there was no statistically significant difference in the positive rate of p-FOXO1 among patients with or without B symptoms ( P > 0.05). The 2-year overall survival (OS) rate in FOXO1 positive group was higher than that in FOXO1 negative group (90.9% vs. 66.7%), the 2-year OS rate in p-FOXO1 positive group was lower than that in p-FOXO1 negative group (50.0% vs. 85.0%), and the differences were not statistically significant (all P > 0.05). Among patients without B symptoms, the 2-year OS rate in FOXO1 positive group was higher than that in FOXO1 negative group (100.0% vs. 50.0%, χ2=5.486, P=0.019). Among patients with primary lymph node, elevated β 2-MG and non-B symptoms, the 2-year OS rate in p-FOXO1 negative expression group was higher than that in p-FOXO1 positive group (100.0% vs. 50.0%, 100.0% vs. 25.0%, 91.7% vs. 33.3%), and the differences were statistically significant (all P < 0.05). Conclusions:FOXO1 may be involved in the development and progression of DLBCL, and FOXO1 positive expression may indicate the good prognosis of patients. These results suggest that p-FOXO1 positive expression may be related with poor prognosis.