Oxygen Radicals As Second Messengers for Expression of the Monocyte Chemoattractant Protein, JE/MCP-1, and the Monocyte Colony-stimulating Factor, CSF-1, in Response to Tumor Necrosis Factor-alpha and Immunoglobulin G. Evidence for Involvement Of...
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The potential involvement of reactive oxygen species in the expression of genes involved in immune response was examined in mesangial cells. Tumor necrosis factor (TNF-alpha) and aggregated (aggr.) IgG increased mRNA levels for the monocyte chemoattractant protein, JE/MCP-1, and the colony-stimulating factor, CSF-1. Scavengers for free radicals such as di- and tetra-methylthiourea (DMTU and TMTU) attenuated the increase in mRNA levels in response to TNF-alpha and aggr. IgG. Generation of superoxide anion by xanthine oxidase and hypoxanthine increased mRNA levels of these genes, but exogenous H2O2 did not. Addition of NADPH to activate a membrane-bound NADPH-oxidase generated superoxide and caused a dose-dependent increase in mRNA levels and further enhanced the stimulation by TNF-alpha or aggr. IgG. An inhibitor of NADPH-dependent oxidase 4'-hydroxy-3'-methoxy-acetophenone attenuated the rise in mRNA levels in response to TNF-alpha and aggr. IgG. By nuclear run-on experiments TNF-alpha, aggr. IgG and NADPH increased the transcription rates for JE/MCP-1 and CSF-1, effects inhibited by TMTU. We conclude that generation of reactive oxygen species, possibly by NADPH-dependent oxidase, are involved in the induction of the JE/MCP-1 and CSF-1 genes by TNF-alpha and IgG complexes. The concerted expression of leukocyte-directed cytokines represents a general response to tissue injury.
Okoro E Int J Mol Sci. 2021; 22(12).
PMID: 34207810 PMC: 8227244. DOI: 10.3390/ijms22126236.
Wang Y, Sun C, Li C, Deng Y, Zeng G, Tao Z Urolithiasis. 2016; 45(2):159-175.
PMID: 27393275 DOI: 10.1007/s00240-016-0902-9.
xCT increases tuberculosis susceptibility by regulating antimicrobial function and inflammation.
Cai Y, Yang Q, Liao M, Wang H, Zhang C, Nambi S Oncotarget. 2016; 7(21):31001-13.
PMID: 27129162 PMC: 5058734. DOI: 10.18632/oncotarget.9052.
Ko J, Kim K J Exerc Nutrition Biochem. 2015; 17(4):181-8.
PMID: 25566429 PMC: 4241907. DOI: 10.5717/jenb.2013.17.4.181.
Reactive oxygen species, inflammation and calcium oxalate nephrolithiasis.
Khan S Transl Androl Urol. 2014; 3(3):256-276.
PMID: 25383321 PMC: 4220551. DOI: 10.3978/j.issn.2223-4683.2014.06.04.