Figure 5.
Overexpression of Mammalian NOS Isoforms Inhibits Autophagosome Synthesis
(A–D) Immunoblot analyses with anti-LC3, along with anti-nNOS, anti-iNOS, and anti-eNOS antibodies, show decreased LC3-II levels in stable HEK293 cell lines overexpressing nNOS (A and D), iNOS-GFP (B and D), or eNOS (C and D) compared to HEK293 control cells in the presence or absence of bafilomycin A1.
(E and F) mCherry-LC3 vesicles were reduced in mCherry-LC3–transfected stable HEK293 NOS cell lines compared to HEK293 control cells cultured in HBSS, an effect that was restored in the NOS cells by L-NAME (F). Images were acquired by a confocal microscope (E).
(G and H) Confocal microscopy images (G) and immunofluorescence analysis with anti-Atg16 antibody show that stable HEK293 NOS cell lines had fewer Atg16-positive structures under starvation, compared to HEK293 control cells (H). Graphical data denote mean ± SEM.