Journal: Autophagy

Article Title: TRIM44 links the UPS to SQSTM1/p62-dependent aggrephagy and removing misfolded proteins

doi: 10.1080/15548627.2021.1956105

Figure Lengend Snippet: TRIM44 promtoes aggregates deaggregation and clearance via autophagy. (a) Cells were treated with MG132 and immunostained with antibodies to ubiquitin (red) and LC3B-II (green). Arrows indicate ubiquitin-positive aggregates that colocalize with LC3B-positive autophagosomes. Scale bars: 10 μm. (b) Confocal images of TRIM44[OE-CON] and TRIM44[OE] U266 cells after treatment with MG132 (0.5 µM) for 16 h followed by a 24-h chase period in normal culture media with DMSO (vehicle), or 3-MA. Arrows indicate cells with remaining aggregates. The relative level of remaining aggregates is determinded by quantifying the percentage of cells with remaining aggregates after a 24-h chase period in normal culture media with DMSO (vehicle), or 3-MA (10 mM) and normalized to the percentage of cells with aggregates formed by the 16 h MG132 (0.5 µM) treatment in corresponding cells. *, P < 0.05; **, P < 0.01; ***, P < 0.001. Scale bars: 10 μm. (c) Confocal images of TRIM44[KD-CON] and TRIM44[KD] U266 cells after treatment with MG132 (0.5 µM) for 16 h followed by a 24-h chase period in normal culture media with DMSO (vehicle), or PP242 (10 nM). Arrows indicate cells with remaining aggregates. Scale bars: 10 µm. The relative level of remaining aggregates is determinded by quantifying the percentage of cells with remaining aggregates after a 24-h chase period in normal culture media with DMSO (vehicle), or PP242 (10 nM) and normalized to the percentage of cells with aggregates formed by the 16 h MG132 (0.5 µM) treatment in corresponding cells. *, P < 0.05; **, P < 0.01; ***, P < 0.001. Scale bars: 10 μm. (d, e) Confocal images of WT or ATG5 KO TRIM44[OE-CON] and TRIM44[OE] U266 cells transfected with NC or ATG5 siRNA after treatment with MG132 (0.5 µM) for 16 h. Aggregates (marked by arrows) were identified by staining with the antibody against ubiquitin (d). Scale bars: 10 µm. The status of aggregates after MG132 treatment was quantified in the histogram. *, P < 0.05; **, P < 0.01; ***, P < 0.001. Scale bars: 10 μm. The protein level of ATG5 and TRIM44 were assayed by western blots (e). (f, g) Confocal images of WT or BECN1 KO TRIM44[OE-CON] and TRIM44[OE] U266 cells were treated with MG132 (0.5 µM) for 16 h. Aggregates (marked by arrows) were identified by staining with the antibody against ubiquitin (f). Scale bars: 10 µm. The status of aggregates after MG132 treatment was quantified in the histogram. *, P < 0.05; **, P < 0.01; ***, P < 0.001. Scale bars: 10 μm. The protein level of BECN1 and TRIM44 were assayed by western blot (g). (h, i) Confocal images of RPMI-TRIM44[Tet-on] cells treated with or without DOX (1 µg/mL) transfected with NC or ATG5 siRNA after treatment with MG132 (0.5 µM) for 16 h. The status of aggregates after MG132 treatment was quantified in the histogram. Scale bars: 10 µm. The status of aggregates after MG132 treatment was quantified in the histogram. *, P < 0.05; **, P < 0.01; ***, P < 0.001. Scale bars: 10 μm. The protein level of ATG5 and TRIM44 were assayed by western blots (h). (j) Confocal images of RPMI-TRIM44[Tet-on] cells treated with or without DOX (1 µg/mL) together with MG132 (5 µM) for 16 h followed by a 24-h chase period in normal culture media with DMSO (vehicle), or 3-MA. Arrows indicate cells with remaining aggregates. The relative level of remaining aggregates is determinded by quantifying the percentage of cells with remaining aggregates after a 24-h chase period in normal culture media with DMSO (vehicle), or 3-MA and normalized to the percentage of cells with aggregates formed by the 16 h MG132 (5 µM) treatment in corresponding cells. *, P < 0.05; **, P < 0.01; ***, P < 0.001. Scale bars: 10 μm.

Article Snippet: Anti-TRIM44 polyclonal antibody (Proteintech Group, 11,511-1-AP); anti-Ub antibody (Biolegend, 646,301); anti-mCherry antibody (ThermoFisher, PA5-34,974); anti-VIM antibody (ThermoFisher, MA5-11,883); anti-NFE2L2/NRF2 antibody (ThermoFisher, PA5-27,882); anti-20S proteasome antibody (MilliporeSigma, ST1049); anti-TUBG/γ-Tubulin antibody (MilliporeSigma, T5326); anti-ATG5 antibody (Novus Biologicals, NBP2-24,389); Anti-GFP antibody (Santa Cruz Biotechnology, sc-9996); anti-ACTB/β-Actin antibody (Santa Cruz Biotechnology, sc-47,778), anti-HA antibody (Santa Cruz Biotechnology, sc-805); anti-BECN1 antibody (Cell Signaling Technology, 4122); anti-HDAC6 antibody (Cell Signaling Technology, 7558); anti-LC3B antibody (Cell Signaling Technology, 3868); anti-SQSTM1/p62 antibody (Cell Signaling Technology, 88,588); anti-cleaved PARP antibody (Cell Signaling Technology, 5625); Alexa Fluor 594 donkey anti rabbit IgG(H + L) (Invitrogen, A21207); Alexa Fluor 546 goat anti mouse IgG(H + L) (Invitrogen, A11003).

Techniques: Ubiquitin Proteomics, Transfection, Staining, Western Blot

Journal: Cell & Bioscience

Article Title: Ubiquitinated AIF is a major mediator of hypoxia-induced mitochondrial dysfunction and pulmonary artery smooth muscle cell proliferation

doi: 10.1186/s13578-022-00744-3

Figure Lengend Snippet: Effects of hypoxia and AIF on mitophagy and autophagy in PASMCs. A AIF influenced mitochondrial function by obstructing Tom20 and Lamp2a colocalization, as indicated by the decreased yellow area. Scale bars: 50 μm (n = 4). B PASMCs were exposed to hypoxia for 24 h, and the expression of Pink and Parkin was evaluated by Western blotting (n = 5). C AIF overexpression mitigated the alteration of mitophagy in PASMCs as determined by Mitophagy Keima-Red plasmid transfection. The number of mitochondrial autophagosomes (yellow dots) was calculated (n = 5). Scale bars: 50 μm. D The expression of LC3B-II, P62 and ATG5/7 was evaluated by Western blotting (n = 5). E Autophagic flux and the formation of autophagosomes were detected (n = 6). Scale bars: 50 μm. F Representative electron micrograph of cells after Nor and Hyp treatment. Asterisks represent autophagosomes and arrows represent autolysosomes. Scale bars: 500 nm (n = 3). All data are presented as the means ± standard deviation. *p < 0.05; **p < 0.01; ***p < 0.001; Nor normoxia, Hyp hypoxia, NC negative control

Article Snippet: Antibodies against Cyclin A, Cyclin D, PCNA, UB, P62, ATG5 and ATG7 (Catalog numbers BM1582, BM4272, BM0104, BM4359, BA2849, BA3525 and BA3527) were obtained from Boster (Wuhan, China).

Techniques: Expressing, Western Blot, Over Expression, Plasmid Preparation, Transfection, Standard Deviation, Negative Control

Journal: Cells

Article Title: Studying Autophagy in Zebrafish

doi: 10.3390/cells6030021

Figure Lengend Snippet: List of antibodies ever used to detect autophagy-related proteins in zebrafish. (Catalogue numbers listed in italics have been used for immunostaining too).

Article Snippet: Atg5 , Novus biologicals , NB110-53818 , [ , ] .

Techniques: Immunostaining

Journal: Veterinary research

Article Title: Incomplete autophagy promotes the proliferation of Mycoplasma hyopneumoniae through the JNK and Akt pathways in porcine alveolar macrophages.

doi: 10.1186/s13567-022-01074-5

Figure Lengend Snippet: Figure 1 M. hyopneumoniae infection increases the formation of autophagosome-like vesicles and the expression of autophagy-related proteins in porcine alveolar macrophages. A Autophagosome-like vesicles (arrows) were observed in M. hyopneumoniae-negative (a) and M. hyopneumoniae-positive (b) PAMs by TEM. Ten M. hyopneumoniae-negative and 10 M. hyopneumoniae-positive PAMs were assessed. B Autophagosome-like vesicles (arrows) were observed in mock-infected (a) or AH-infected (b) 3D4/21 cells by TEM. Ten uninfected and 10 AH-infected 3D4/21 cells were assessed. C Results of Western blotting showing the expression of autophagy-related proteins (LC3-II, Atg5, Atg12-Atg5, and Beclin 1) and Mhp366 in 30 M. hyopneumoniae-positive and 10 M. hyopneumoniae-negative PAMs collected from pigs. D Results of Western blotting showing the expression of autophagy-related proteins (LC3-II, Atg5, Atg12-Atg5, and Beclin 1) and P97 protein in 3D4/21 cells after mock infection or AH infection. Mean values from 3 independent experiments are presented. Between-group differences were assessed using a t test; *p ≤ 0.05, **p ≤ 0.01.

Article Snippet: Polyclonal antibodies against ATG5 (NBP2-24389), ATG5 (NB11053818), Beclin 1 (NB110-87318), and p62 (NBP1-48320) were purchased from Novus Biologicals (Shanghai, China).

Techniques: Infection, Expressing, Western Blot