LITAF mediation of increased TNF-α secretion from inflamed colonic lamina propria macrophages.
LITAF mediation of increased TNF-α secretion from inflamed colonic lamina propria macrophages.
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LITAF 介导发炎的结肠固有层巨噬细胞 TNF-α 分泌增加。
DOI:
10.1371/journal.pone.0025849
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Amar S
中科院分区:
文献类型:
--
作者:
Bushell KN;Leeman SE;Gillespie E;Gower AC;Reed KL;Stucchi AF;Becker JM;Amar S
Dysregulation of TNF-α in lamina propria macrophages (LPM) is a feature of inflammatory bowel diseases (IBD). LPS-Induced-TNF-Alpha-Factor (LITAF) is a transcription factor that mediates TNF-α expression. To determine whether LITAF participates in the mediation of TNF-α expression in acutely inflamed colonic tissues, we first established the TNBS-induced colonic inflammation model in C57BL/6 mice. LPM were harvested from non-inflamed and inflamed colonic tissue and inflammatory parameters TNF-α and LITAF mRNA and protein levels were measured ex-vivo. LPM from TNBS-treated mice secreted significantly more TNF-α at basal state and in response to LPS than LPM from untreated mice (p<0.05). LITAF mRNA and protein levels were elevated in LPM from TNBS compared with untreated animals and LPS further increased LITAF protein levels in LPM from inflamed tissue (P<0.05). To further confirm the role of LITAF in acutely inflamed colonic tissues, TNBS-induced colonic inflammation was produced in LITAF macrophage specific knockout mice (LITAF mac -/- mice) and compared to wild type (WT) C57BL/6. Twenty four hours following TNBS administration, colonic tissue from LITAF mac -/- mice had less MPO activity and reduced colonic TNF-α mRNA then WT C57BL/6 mice (p<0.05). LPM harvested from LITAF mac -/- secreted significantly less TNF-α in response to LPS than wild type (WT) C57BL/6 (p<0.05). This study provides evidence that LITAF contributes to the regulation of TNF-α in LPM harvested following acute inflammation or LPS treatment paving the way for future work focusing on LITAF inhibitors in the treatment of TNF-α-mediated inflammatory conditions.
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影响因子:
15.3
作者:
Goldfeld, A E;McCaffrey, P G;Strominger, J L;Rao, A
通讯作者:
Rao, A
影响因子:
3.1
作者:
Reed, KL;Fruin, AB;Becker, JM
通讯作者:
Becker, JM
影响因子:
4.8
作者:
Ma, W;Lim, W;Kumar, A
通讯作者:
Kumar, A
影响因子:
4.5
作者:
Kim, Hee J.;Lee, Hui S.;Kang, Jihee Lee
通讯作者:
Kang, Jihee Lee
DOI:
10.1073/pnas.96.8.4518
发表时间:
1999-04-13
影响因子:
11.1
作者:
Myokai, F;Takashiba, S;Amar, S
通讯作者:
Amar, S