Abstract:
BACKGROUND:Bacterial meningitis is associated with high mortality and long-term neurological sequelae. Increasing the phagocytic activity of microglia could improve the resistance of the CNS against infections. We studied the influence of activin A, a member of the TGF-β family with known immunoregulatory and neuroprotective effects, on the functions of microglial cells in vitro. METHODS:Primary murine microglial cells were treated with activin A (0.13 ng/ml-13 μg/ml) alone or in combination with agonists of TLR2, 4, and 9. Phagocytosis of Escherichia coli K1 as well as release of TNF-α, IL-6, CXCL1, and NO was assessed. RESULTS:Activin A dose-dependently enhanced the phagocytosis of Escherichia coli K1 by microglial cells activated by agonists of TLR2, 4, and 9 without further increasing NO and proinflammatory cytokine release. Cell viability of microglial cells was not affected by activin A. CONCLUSIONS:Priming of microglial cells with activin A could increase the elimination of bacteria in bacterial CNS infections. This preventive strategy could improve the resistance of the brain to infections, particularly in elderly and immunocompromised patients.
journal_name
J Neuroinflammationjournal_title
Journal of neuroinflammationauthors
Diesselberg C,Ribes S,Seele J,Kaufmann A,Redlich S,Bunkowski S,Hanisch UK,Michel U,Nau R,Schütze Sdoi
10.1186/s12974-018-1209-2subject
Has Abstractpub_date
2018-06-07 00:00:00pages
175issue
1issn
1742-2094pii
10.1186/s12974-018-1209-2journal_volume
15pub_type
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