Contact of apoptotic cells (AC) with phagocytes tilts the balance of pro-inflammatory and anti-inflammatory cytokines. To address the cell- and stimulus-dependency of this mechanism, human monocyte-derived dendritic cells were treated with Jurkat AC in the presence and absence of different stimuli. AC reduced the production of IL-23 and enhanced the production of IL-10 elicited by zymosan, but they did not influence IL-12 p70 production nor did they modify the effect of LPS. Since formation of lipid bodies (LB) and PGE(2) production have been associated with IL-10 induction, the effect of PGE(2), the formation of LB, and the role of PPAR-γ were assessed. Exogenous PGE(2) enhanced IL-10 expression, but no evidence of PGE(2) production elicited by AC was obtained. Inhibition of PPAR-γ activity reduced the production of IL-10 both in the presence and in the absence of AC, but formation of LB in response to zymosan and AC was not observed. Notably, AC induced a transient nuclear translocation of both the CREB coactivator CRTC2/TORC2 and the homeodomain protein PBX1, which are involved in the CREB/HOX/PBX/MEIS transcription complex. These data show a selective effect of AC on the production of cytokines elicited by the fungal surrogate zymosan through the enhancement of CREB-dependent transcription.
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http://dx.doi.org/10.1016/j.molimm.2011.07.022 | DOI Listing |
Inflammation
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Department of Pharmacy, Chinese PLA General Hospital, Beijing, China.
Cholestasis is a multifactorial hepatobiliary disorder, characterized by obstruction of bile flow and accumulation of bile, which in turn causes damage to liver cells and other tissues. In severe cases, it can result in the development of life-threatening conditions, including cirrhosis and liver cancer. Paeoniflorin (PF) has been demonstrated to possess favourable therapeutic potential for the treatment of cholestasis.
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Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box: 14115-154, Tehran, Iran.
Ferroptosis is a novel, iron-dependent form of non-apoptotic cell death characterized by the accumulation of lipid reactive oxygen species (ROS) and mitochondrial shrinkage. It is closely associated with the onset and progression of various diseases, especially cancer, at all stages, making it a key focus of research for developing therapeutic strategies. Numerous studies have explored the role of microRNAs (miRNAs) in regulating ferroptosis by modulating the expression of critical genes involved in iron metabolism and lipid peroxidation.
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Institute of Precision Medicine, The First Affiliated Hospital; Department of Pediatrics, The Seventh Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
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View Article and Find Full Text PDFJ Cell Immunol
January 2024
Department of Medicine, University of Washington, Seattle, Washington, U.S.A.
Neutrophil elastase () mutations are the most common cause of cyclic (CyN) and congenital neutropenia (SCN), two autosomal dominant disorders causing recurrent infections due to impaired neutrophil production. Granulocyte colony-stimulating factor (G-CSF) corrects neutropenia but has adverse effects, including bone pain and in some cases, an increased risk of myelodysplasia (MDS) and acute myeloid leukemia (AML). Hematopoietic stem cell transplantation is an alternative but is limited by its complications and donor availability.
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April 2025
The First College of Clinical Medical Science, Yichang Central People's Hospital, China Three Gorges University, Yichang, 443000 China.
Despite improvements in therapeutic approaches, the mortality rate of gastric cancer (GC) remains unacceptably high. Evidence suggests that FXYD domain containing ion transport regulator 6 (FXYD6) is downregulated in GC. However, its exact function and the molecular mechanism in GC are still unclear.
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