title: Correlation between endotoxin tolerance in human monocyte leukemia cell line THP-1 with glucocorticoid receptor-alpha.
abstract: Human monocyte leukemia cell line THP-1 was stimulated with lipopolysaccharide (LPS) to simulate the sepsis model and the expression of human glucocorticoid receptor-alpha (GR-alpha) mRNA in montocytes with endotoxin tolerance was investigated. THP-1 cells were cultured in serum-free medium, randomly divided into groups A, B, C, D and E, and stimulated with 0, 10, 10, 100, 0 ng/mL LPS for 24 h followed with 100, 100, 10, 100, 0 ng/mL LPS for another 24 h respectively. The expression of GR-alpha mRNA was detected by semi-quantitative reverse transcriptional polymerase chain reaction. Tumor necrosis factor-alpha (TNF-alpha) was determined by enzyme linked immunosorbent assay (ELISA). The results showed that the A values of GR-alpha/beta-actin in groups A, B, C, D and E was 0.607 +/- 0.006, 0.368 +/- 0.005, 0.484 +/- 0.008, 0.509 +/- 0.004 and 0.564 +/- 0.014 respectively with the difference being significant among the groups (P < 0.05). The GR-alpha mRNA expression was negatively correlated with the TNF-alpha expression (P < 0.01). It was concluded that the down-regulation of the expression of GR-alpha mRNA in endotoxin tolerance THP-1 cells might play an important role in the development of endotoxin tolerance in THP-1 cells.
authors.affiliation: Department of Traumatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Yang
authors.forename: Xiangjun
authors.initials: X
authors.lastname: Bai
authors.forename: Haiping
authors.initials: H
authors.lastname: Wang
authors.forename: Zhanfei
authors.initials: Z
authors.lastname: Li
authors.forename: Siqi
authors.initials: S
authors.lastname: Li
authors.forename: Bo
authors.initials: B
authors.lastname: Li
mesh_terms: D004361:Drug Tolerance; D004731:Endotoxins / Q000494:pharmacology*; D006801:Humans; D007948:Leukemia, Monocytic, Acute / Q000378:metabolism* / Q000473:pathology; D009000:Monocytes / Q000378:metabolism*; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D011965:Receptors, Glucocorticoid / Q000096:biosynthesis* / Q000235:genetics; D014407:Tumor Cells, Cultured
chemical_list: D004731:Endotoxins; D012333:RNA, Messenger; D011965:Receptors, Glucocorticoid; C411470:glucocorticoid receptor alpha