Cytokines Flashcards
IL-1 is secreted by what cells?
monocytes, macrophages, B cells, dendritic cells, endothelial cells, others
What are the target tissues for IL-1?
Th cells
B cells
NK cells
endothelial cells
macrophages and neutrophils
hepatocytes
hypothalamus
How does IL-1 act on Th cells?
costimulates activation
How does IL-1 act on B cells?
promotes maturation and clonnal expansionn
How does IL-1 act on NK cells?
enhances activity
How does IL-1 act on endothelial cells?
increases expression of ICAMs
How does IL-1 act on macrophages and neutrophils?
chemotactically attracts
How does IL-1 act on hepatocytes?
induces synthesis of acute-phase proteins
How does IL-1 act on the hypothalamus?
induces fever
IL-2 is secreted by what cells?
Th cells
What is the target cell/tissue IL-2 targets?
antigen primed Th and CTLs
What is hte action of IL-2?
induces proliferation, enhances activity
What type of cells is IL-3 secreted by?
Th cells, NK cells
What is the target cell/tissue for IL-3?
hematopoietic cells (myeloid)
IL-3 has what actionns on hematopoietic cells (myeloid)?
supports growth and differentiation
IL-4 is secreted by what cells?
Th2 cells
What is the target cell/tissue of IL-4?
antigen-primed B cells, activated B cells
What is the action of IL-4 on antigen-primed B cells?
costimulates activationn
What is the action of IL-4 on activated B cells?
stimulates proliferation and differentiation, induces class switch to IgE
What cells is IL-5 secreted by?
Th2 cells and mast cells
What is the target cell/tissue of IL-5?
bone marrow cells
What is the action of IL-5 on bone marrow cells?
induces eosinophil differentiation
What are the cells that secrete IL-6?
monocytes, macrophages, Th2 cells, bone marrow stromal cells
What is the target cell/tissue for IL-6?
- proliferating B cells
- plasma cells
- myeloid stem cells
- hepatocytes
What is the action of IL-6 on proliferating B cells?
promotes terminal differentiation into plasma cells
What is the action of IL-6 on plasma cells?
stimulates Ab secretion
What is the action of myeloid stem cells on IL-6?
helps promote differentiation
What is the action of IL-6 on hepatocytes?
induces synthesis of acute phase proteins
What cells are the cytokinne IL-7 secreted by?
bone marrow, thymic stromal cells
What are the target cells/ tissues for IL-7?
lymphoid stem cells
What are the action of IL-7 on lymphoid stem cells?
induces differentiation into progenitor B and T cells
IL-8 is secreted by what type of cells?
macrophages, endothelial cells
IL-8 targets what target cells/ tissue?
neutrophils
What is the action of IL-8 on neutrophils?
chemokine, induces adherence to endothelium and extravasation into tissues