Inhibiting ADAM17 activity in human iPSC derived microglia cells leads to abnormal LD phenotypes.Figure 7A-C. Fluorescent images of human iPSC derived microglia cells, labelled with 493/503 BODIPY (green) and FM-dye (red) to mark lipids and membranes respectively. iPSC derived microglia cells were obtained from 3 different donors, and treated with either DMSO, GW, TAPI-1 or GI. Scale bars: 10μm Quantitation of the BODIPY signal shown as integrated total lipid for cells corresponding to each treatment and donor n=15 cells for each treatment. The box end points represent the upper (75%) and lower (25%) quartiles, the whiskers define the maximum 95th percentile and minimum 5th percentile values respectively, the central band is the median, the square is the mean, and the diamond an outlier. Data were analysed using the Kruskal Wallis test followed by Dunn's test for post hoc analysis for significance due to unequal sample sizes. ***p<0.001. Quantitation of the BODIPY signal shown as normalised LD size (normalised to DMSO) for cells corresponding to each treatment and donor mentioned =15 cells for each treatment. The box end points represent the upper (75%) and lower (25%) quartiles, the whiskers define the maximum 95th percentile and minimum 5th percentile values respectively, the central band is the median, the square is the mean, and the diamond an outlier. Data were analysed using the Kruskal Wallis test followed by Dunn's test for post hoc analysis for significance due to unequal sample sizes. ***p<0.001. F-G. Q-PCR analysis of mRNA transcripts of lipogenic genes FASN and LDLR in pooled data obtained from 3 different donors of human iPSC derived microglia treated with either DMSO, GW or GI for 24 hours. n=3 biological replicates, with 3 technical replicates for each genotype. The box end points represent the maximum and minimum values respectively, the central band is the median and the square is the mean. all data were quantified for significance using Student's t test. ***p<0.001, **p<0.01, *p<0.05. H-J. Fluorescent images of Mitotracker and MitoSOX labelling of cells from Donor number 2 treated for 24hours with either DMSO, GW or GI. Scale bars: 10μm K. Quantitative measurements of MitoSOX intensity normalised to that of Mitotracker in iPSC derived microglia cells from three different donors, treated with either DMSO, GW or GI; n=10 cells for each treatment per donor. The box end points are the upper (75%) and lower (25%) quartiles, the whiskers define the maximum 95th percentile and minimum 5th percentile values respectively, the central band is the median and the square is the mean. all data were quantified for significance using Student's t test. ***p<0.001, **p<0.01, *p<0.05. L-N. Fluorescent images of C-11 BODIPY treated microglia cells from Donor no.1, treated for 24 hours with either DMSO, GW or GI. These representative images display relative amounts of peroxidated and non-peroxidated lipids. Scale bars: 10μm O. Quantification of BODIPY C-11 staining, shown as ratios of peroxidated versus non-peroxidated lipids, depicted as normalised intensity; n=10 cells for each treatment per donor. The box end points are the upper (75%) and lower (25%) quartiles, the whiskers define the maximum 95th percentile and minimum 5th percentile values respectively, the central band is the median and the square is the mean. all data were quantified for significance using Student's t test. ***p<0.001, **p<0.01, *p<0.05.