Analysis of the nature and sequence of cell-derived and environmental signals for progressive development of the fully activated macrophage was the long-term goal of our original proposal. Significant progress has been made towards the elucidation of this differentiative pathway. this progress is largely attributable to the recent availability of highly purified and cloned cytokines which were used in conjunction with macrophages derived from the endotoxim """"""""hyporesponsive"""""""" C3H/HeJ mouse strain. In the studies described herein, we will continue to utilize this extremely sensitive system to extend our original findings. We propose to analyze the control mechanisms which govern colony stimulating factor (CSF)- and gamma interferon (IFN-y)-induced effects on macrophage proliferation and differentiation. We will also assess the role of these cytokines in the activation of macrophages to kill Salmonella typhimurium intracellularly or to produce inflammatory mediators, such as elastase or collagenase. In addition, we plan to utilize bone marrow-derived macrophages from endotoxim """"""""responder"""""""" and """"""""nonresponder"""""""" mice to delineate the role of cytokines in the acquisition or endotoxin sensitivity. Lastly, we propose to define the contribution of ancillary, serum-derived signals in cytokine-induced differentiation by using a """"""""defined, complete"""""""" serum-free medium. The characterization of the cytokines involved, as well as delineation of the specific sequences of intra- and intercellular signals that result in the development of the fully activated macrophage, could provide novel therapeutic approaches for diseases in which activated macrophages have beneficial or detrimental roles. The ability to stimulate activation of host macrophages might benefit patients who have neoplasms or infections with intracellular pathogens. In contrast, the capacity to control macrophage activation such that the production of toxic mediators is mitigated may be beneficial to patients who suffer from chronic inflammatory diseases such as rheumatoid arthritis or periodontal disease. Finally, an improved understanding of the relationships between the state of macrophage activation and endotoxin sensitivity might provide insights for successful treatment of septic shock or other complications of Gram negative bacillary infections.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
5R01AI018797-07
Application #
3128229
Study Section
Bacteriology and Mycology Subcommittee 1 (BM)
Project Start
1982-04-01
Project End
1989-11-30
Budget Start
1988-09-01
Budget End
1989-11-30
Support Year
7
Fiscal Year
1988
Total Cost
Indirect Cost
Name
Henry M. Jackson Fdn for the Adv Mil/Med
Department
Type
DUNS #
City
Rockville
State
MD
Country
United States
Zip Code
20852
Prantner, Daniel; Perkins, Darren J; Vogel, Stefanie N (2017) AMP-activated Kinase (AMPK) Promotes Innate Immunity and Antiviral Defense through Modulation of Stimulator of Interferon Genes (STING) Signaling. J Biol Chem 292:292-304
Prantner, Daniel; Shirey, Kari Ann; Lai, Wendy et al. (2017) The ?-defensin retrocyclin 101 inhibits TLR4- and TLR2-dependent signaling and protects mice against influenza infection. J Leukoc Biol 102:1103-1113
Perrin-Cocon, Laure; Aublin-Gex, Anne; Sestito, Stefania E et al. (2017) TLR4 antagonist FP7 inhibits LPS-induced cytokine production and glycolytic reprogramming in dendritic cells, and protects mice from lethal influenza infection. Sci Rep 7:40791
Perkins, Darren J; Vogel, Stefanie N (2016) Inflammation: Species-specific TLR signalling -- insight into human disease. Nat Rev Rheumatol 12:198-200
Keegan, Achsah D; Shirey, Kari Ann; Bagdure, Dayanand et al. (2016) Enhanced allergic responsiveness after early childhood infection with respiratory viruses: Are long-lived alternatively activated macrophages the missing link? Pathog Dis 74:
Perkins, Darren J; Rajaiah, Rajesh; Tennant, Sharon M et al. (2015) Salmonella Typhimurium Co-Opts the Host Type I IFN System To Restrict Macrophage Innate Immune Transcriptional Responses Selectively. J Immunol 195:2461-71
Rajaiah, Rajesh; Perkins, Darren J; Ireland, Derek D C et al. (2015) CD14 dependence of TLR4 endocytosis and TRIF signaling displays ligand specificity and is dissociable in endotoxin tolerance. Proc Natl Acad Sci U S A 112:8391-6
Piao, Wenji; Shirey, Kari Ann; Ru, Lisa W et al. (2015) A Decoy Peptide that Disrupts TIRAP Recruitment to TLRs Is Protective in a Murine Model of Influenza. Cell Rep 11:1941-52
Mistry, Pragnesh; Laird, Michelle H W; Schwarz, Ryan S et al. (2015) Inhibition of TLR2 signaling by small molecule inhibitors targeting a pocket within the TLR2 TIR domain. Proc Natl Acad Sci U S A 112:5455-60
Perkins, Darren J; Vogel, Stefanie N (2015) Space and time: New considerations about the relationship between Toll-like receptors (TLRs) and type I interferons (IFNs). Cytokine 74:171-4

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