| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
|
|---|
| Outline of Final Research Achievements |
We investigated why inflammatory responses was increased in aged mice upon injection of dead cells and why the phagocytic capacity of peritoneal resident macrophages from aged mice was reduced. When cocultured with dead cells, the peritoneal resident macrophages from aged mice significantly produced MIP-2, whereas MIP-2 production by macrophages from WT young mice required IFN-γ. The peritoneal resident macrophages from aged mice expressed CD40, a M1 macrophage marker, as in the case of M1 macrophages. Furthermore, M1 macrophages exhibited less phagocytic capacity as to dead cells than non-treated macrophages. These results suggest that the phenotype of peritoneal resident macrophages is skewed toward M1-like in aged mice and that such skewing toward M1-like is involved in enhancement of inflammatory responses induced by dead cells in aged mice.
|
