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MFG-E8 inhibits Aβ-induced microglial production of cathelicidin-related antimicrobial peptide: A suitable target against Alzheimer's disease.
Cellular Immunology 2018 September
Neuroinflammation plays a pivotal role in the incidence and progression of Alzheimer's disease (AD). Cathelicidin-related antimicrobial peptide (CRAMP) is critically involved in the innate neuronal responses of chronic neuroinflammation in AD and thus plays a key role in the disease. Here, we show that Aβ42 induced microglial production of CRAMP, which was effectively inhibited by milk-fat globule-epidermal growth factor 8 (MFG-E8). Production of CRAMP was associated with activation of ERK1/2, p38 and phospho-P65-NF-kB upregulation. Additionally, the phosphorylation of these signaling proteins was also reversed by MFG-E8. Pre-incubation with signaling inhibitors confirmed that MFG-E8 has a regulatory role on CRAMP through MAPK and NF-kB signaling pathways. MFG-E8 treatment may thus be a potential pharmacotherapy for chronic inflammation in AD.
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