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Journal: iScience
Article Title: Cardiomyocyte-fibroblast interaction regulates ferroptosis and fibrosis after myocardial injury
doi: 10.1016/j.isci.2024.109219
Figure Lengend Snippet: Cardiac fibroblasts interact with cardiomyocytes through gap junctions to share free iron (A and B) Wild-type mouse heart tissue stained for Fth1 [magenta, (A)] or Ftl [magenta, (B)], with cTnT (green) and DAPI (blue) at 1DPMI after P7 LAD-O. Arrows: non-cardiomyocytes positive for Fth1 (A) or Ftl (B). (C and D) Mouse heart tissue stained for Fth1 [red, (C)] or Ftl [red, (D)], with Pdgfrα (gray), cTnT (green), and DAPI (blue) at 1 DPMI after P7 LAD-O. Arrows: cells positive for Pdgfrα and Fth1 (C) or Ftl (D). (E and F) Mouse heart tissue stained for Fth1 [green, (E)] or Ftl [green, (F)], with Pdgfrα (red), MF20 (gray), and DAPI (blue) at 6 DPMI after P7 LAD-O. Arrows: cells positive for Pdgfrα and Fth1 (E) or Ftl (F). (G) Diagram of cardiomyocyte-fibroblast interaction after MI. (H and I) Mouse heart section stained for Cx45 [green, (H)] or Cx43 [green, (I)], with Pdgfrα (red), MF20 (gray), and DAPI (blue) after P7 LAD-O. Arrows: potential locations of gap junctions between cardiomyocytes and fibroblasts. (J–L) Co-cultured iCM and HCF stained for VIMENTIN (VIM, gray), free Fe 2+ (red), DAPI (blue), and imaged with TITIN-GFP (green) after DMSO (J) or erastin (15 μM) (K, L) treatment. Asterisks: HCFs with accumulation of Fe 2+ . (M) siRNA knockdown of CX43 and CX45 simultaneously in iCM-HCF co-culture; Fe 2+ fluorescent intensity ratio of iCMs over HCFs was quantified after erastin or DMSO treatment. LV, left ventricle. All bar graphs represent mean ± SD. ∗∗∗p < 0.001; ∗∗∗∗p < 0.0001 by t test. Scale bar, 75 μm (A, B, E, F, H), 25 μm (C, D, I, J–L). See also Figures S4 and .
Article Snippet: Human Cardiac Fibroblasts (HCF) (Cell Applications Inc, 306V-05a) were cultured in HCF Growth Medium (Cell Applications Inc, 316–500).
Techniques: Staining, Cell Culture, Knockdown, Co-Culture Assay