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3 protocols using ab2917

1

Neuropathological Examination of Rare Fatal Conditions

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Three patients died during follow-up (III-10, III-12, and III-13); brain autopsy was performed by the Netherlands Brain Bank within 4 hours after death. Formalin-fixed (10%) and paraffin-embedded tissue blocks were available for examination. Eight-micrometer sections of all cortical regions, subcortical nuclei, brainstem, and cerebellum underwent routine staining. Immunohistochemistry was performed using the following antibodies: hyperphosphorylated tau (AT8, Innogenetics, Ghent, Belgium; 1:40), beta-amyloid (anti-amyloid, DAKO, Glostrup, Denmark; 1:100, following formic acid pretreatment), alpha-synuclein (anti-synuclein, Zymed Laboratories, San Francisco, CA; undiluted, following formic acid pretreatment), TDP-43 (anti-phospho TDP-43, Cosmo Bio, 1:100 and Proteintech Group, 1:100), ubiquitin (anti-ubiquitin, DAKO, Glostrup, Denmark; 1:500, following 80°C antigen retrieval), p62 (mouse D3 Clone, Santa Cruz, 1:100), 1C2 (mouse 5TF1-1C2-172 Clone, Chemicon, 1:3,200), and STUB1 (rabbit anti-STUB1 Abcam ab2917, 1:100).
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2

Hepatitis B Virus Degradation Pathways

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HepAD38 cells were infected with LV-sh_STUB1 or LV-contr. for 24 h and then treated with 1 μM Bay41-4109 for 48 h, 0.1 μM Baf A1 for 12 h, 10 mM 3-MA for 12 h, or a combination of them as indicated. The cells were washed with PBS, fixed in 4% paraformaldehyde, and permeabilized with 0.1% Triton X-100 (Bio-Rad). The cells were then stained with anti-HBc (1:1000, Dako, B0586), anti-p62 (1:50, abcam, ab256416), anti-LAMP1 (1:40, abcam, ab25630), or anti-Hsp70 (1:200, abcam, ab2787) followed by incubation with AlexaFluor 594-, AlexaFluor 488-, or DyLight 405-conjugated secondary antibodies (cell signaling, #8890 or #4408; abbkine, A23120) for the co-localization of HBc with LAMP1. For the double staining of HBc and STUB1, the primary antibodies anti-HBc (1:100, abcam, ab8637) and anti-STUB1 (1:200, abcam, ab2917) were used. Fluorescent images were acquired using a Leica TCS SP8 confocal microscope.
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3

Western blot analysis of cellular proteins

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Protein extracts (50 μg) were loaded on an SDS-PAGE and transferred onto a polyvinylidene fluoride (PVDF) membrane (Immobilion-P, Millipore). After blocking in 3% BSA, membranes were incubated with the following primary antibodies: anti-β-Actin (C4) (sc-47778, Santa Cruz Biotechnology, Dallas, TX, USA), anti-TERT (600-401-252S, Rockland), anti-SOD2 (sc-137254, Santa Cruz Biotechnology), anti-Aco2 (NBP1-32781, Novus Biological), anti-CHIP (ab2917, Abcam), anti-COX IV (ab14744, Abcam) and anti-α-tubulin (T6199, Sigma-Aldrich). Finally, membranes were incubated with the appropriate HRP-conjugated secondary antibody (Bio-Rad Laboratories, Hercules, CA, USA). Proteins were visualized using ClarityTM Western ECL substrates (Bio-Rad). Images were acquired on ChemiDoc™ Imaging system (Bio-Rad) and protein levels were quantified using the Image Lab software (Bio-Rad). Experiments were repeated at least three times.
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