Journal: Journal of Anesthesia and Translational Medicine
Article Title: MANF improves cognitive function and attenuates neuroinflammation in APP/PS1 transgenic mice through the TLR4/MYD88/NF-κB signaling pathway
doi: 10.1016/j.jatmed.2025.12.005
Figure Lengend Snippet: MANF inhibits Aβ1–42-induced neuroinflammation in BV2 cells via the TLR4/NF-κB signaling pathway. (A) Schematic diagram illustrates the experimental design for studying the effects of MANF intervention on Aβ1–42-induced neuroinflammation in BV2 cells. (B–D) ELISA analysis of the concentrations of inflammatory cytokines TNF-α, IL-6, and IL-1β in the supernatant of BV2 cell cultures (n = 4). MANF intervention significantly reduced the secretion of inflammatory cytokines induced by Aβ1–42. (E) Representative immunofluorescence images of the neuroinflammation marker IBA-1 (red) and nuclear staining with DAPI (blue) in BV2 cells. Scale bar = 100 μm. (F) Quantitative analysis of IBA-1-positive cells (n = 3) shows that MANF significantly decreased Aβ1–42-induced activation of BV2 cells. (G) Confocal images show increased nuclear translocation of p65 in Aβ-treated BV2 cells, which was attenuated by MANF treatment. p65 is shown in yellow and nuclei are stained with DAPI (blue) (n = 6). (H) Western blot analysis of TLR4/NF-κB pathway-related proteins, including TLR4, Myd88, PP65, and p-IKBα, in BV2 cells. (I–L) Quantitative analysis of the protein expression levels of TLR4, Myd88, PP65, and p-IKBα (n = 6). The data demonstrates that MANF significantly inhibited Aβ1–42-induced neuroinflammatory responses by downregulating the expression of TLR4/NF-κB pathway-related proteins. All data are presented as mean ± standard error of the mean (S.E.M.). Statistical significance is indicated as follows: * P < 0.05; ** P < 0.01; *** P < 0.001; **** P < 0.0001.
Article Snippet: To assess the regulatory influence of MANF on neuroinflammation and apoptosis, two distinct cell lines were utilized: HT22 mouse hippocampal neuronal cells and BV2 mouse microglial cells (Procell, China).
Techniques: Enzyme-linked Immunosorbent Assay, Immunofluorescence, Marker, Staining, Activation Assay, Translocation Assay, Western Blot, Expressing