Journal: Proceedings of the National Academy of Sciences of the United States of America
Article Title: Two-pore channels regulate endomembrane tension to enable remodeling and resolution of phagolysosomes.
doi: 10.1073/pnas.2309465121
Figure Lengend Snippet: Fig. 2. TPC activity is required for phagosome resolution. (A and B) RAW 264.7 cells expressing TPC1-tdTomato or TPC2-mCherry challenged with Alexa Fluor 488 anti-IgG labeled sRBC for indicated times. xy plane, Left. Extended focus, Left. (Scale bar, 5 µm.) Quantification in (B) for individual phagosomes. n = 3. (C and D) wt and TPC1/2−/− BMDM challenged with sRBC. Resolution assessed up to 4 h. (Scale bar, 10 µm.) Phagosome volume quantified in (D). Dots represent individual fields containing >3 cells, >9 phagosomes. n = 3. (E) As in (C), using 25× magnification. (Scale bar, 25 µm.) (F) wt and TPC1/2−/− BMDM and TPC1/2−/− BMDM expressing wtTPC2-mCherry or TPC2(N257A)-mCherry, quantified as in (D). Dots represent individual phagosomes. >30 cells, >100 phagosomes. n = 2.
Article Snippet: Mammalian expression vectors were described in the following sources: wtTPC1- tdTomato (13), wtTPC2- mCherry (Addgene; plasmid no. 135183), TPC2(N257A)- mCherry (Addgene; plasmid no. 135186), LAMP1- GFP (35), and EEA1- eGFP (77).
Techniques: Activity Assay, Expressing, Labeling