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4 protocols using ab180943

1

Multiplex Protein Expression in Lung Cancer

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The cell lines used were as follows: HAE (CP-H209, Procell, Wuhan, China), A549 (CL-0016, Procell), HCC827 (CL-0094, Procell), NCL-H1299 (CL-0165, Procell), and NCL-H524 (CL-0403, Procell).
The following antibodies were used: anti-TMED2 (ab251705, Abcam, Cambridge, USA), anti-Ki-67 (ab15580, Abcam), anti-CEA (ab207718, Abcam), anti-NSE (ab180943, Abcam), anti-EGFR (ab200828, Abcam), anti-TLR4 (ab13556, Abcam), anti-NF-κB-p-p65 (BM3940, Boster, Wuhan, China), anti-IL-1β (ab2105, Abcam); anti-IL-18 (ab207323, Abcam); and anti-β-actin (M01263-2, Boster). The secondary antibodies used were anti-rabbit IgG (AS014, ABclonal, Wuhan, China) and anti-mouse IgG (H+L) (AS003, ABclonal).
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2

Protein Expression Analysis in Cells

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Total protein was lysed from cells using radioimmunoprecipitation assay buffer (RIPA buffer; Beyotime, Shanghai, China) supplemented with protease inhibitors. SDS/PAGE was used to separate 30 µg of total proteins, which were then transferred to a nitrocellulose membrane. The membranes were blocked with 5% non-fat milk and then incubated overnight at 4°C with specific primary antibodies. The membranes were washed and incubated with secondary antibodies at room temperature for 1 h. Electro chemiluminescent detection was used to visualize the protein bands. The expressions of GAPDH and β-actin were used as internal controls. The primary antibodies were used in this study: anti-SOX11 (Santa Cruz, CA, United States), anti-MYCN (#84406, Cell Signaling Technology, United States), anti-p21 (ab109199, Abcam, United States), anti-p27 (ab32034, Abcam, United States), anti-Cyclin D1 (ab134175, Abcam, United States), anti-NSE (ab180943, Abcam, United States), anti-CHGA (ab68271, Abcam, United States), and anti-SYP (ab32127, Abcam, United States). Quantification of the western blots was performed using ImageJ.
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Western Blot Analysis of Protein Markers

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Total protein was extracted from cells in different groups after lysis with RIPA lysis buffer (Beyotime). Protein concentration was determined using a bicinchoninic acid assay (Thermo Fisher Scientific, USA). Equal amounts of protein samples were subjected to SDS-polyacrylamide gel electrophoresis and transferred onto PVDF membranes that were blocked with 5% milk powder containing 0.1% TBS-Tween-20, and incubated with specific primary antibodies against Bcl-2 (ab182858; Abcam, USA), cleaved caspase-3 (ab32042; Abcam), p53 (ab26; Abcam), LC3B (ab192890; Abcam), p62 (ab109012; Abcam), Beclin1 (ab210498; Abcam), TTF1 (#12373; CST, USA), TrkA (#2505; CST), TrkB (#4607; CST), NSE (ab180943; Abcam), MAP2 (ab32454; Abcam), TAU (ab76128; Abcam), and GAPDH (ab128915; Abcam) at 4°C overnight. After incubation with HRP-linked secondary antibodies (BA1051 and BA1054; BOSTER, China) for 2 h at room temperature, protein bands were visualized using chemiluminescence reagent (Millipore, USA) in a Bio-Rad Universal Hood II DOC Electrophoresis Imaging Cabinet.
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4

Quantification of BDEV Protein Markers

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Total protein was extracted from previously isolated BDEVs and the lungs, liver and kidney tissues of rats. The concentrations of BDEVs were determined by NTA and were adjusted to the same level in each group. The concentrations of protein samples obtained from the lung, liver and kidney were measured by using a BCA protein assay (Beyotime, Beijing, China). Proteins were loaded on SDS polyacrylamide gels(genscript, Nanjing, China), separated, and transferred to polyvinylidene difluoride (PVDF) membranes (Millipore, USA). According to the reference interval of the antibody manual, the membranes were cut and respectively incubated with antibodies against GFAP (1:10000, ab7260, Abcam, Cambridge, UK), NSE (1:1000, ab180943, Abcam, Cambridge, UK), GAPDH (1:2500, ab9485, Abcam, Cambridge, UK), bax (1:1000, ab32503, Abcam, Cambridge, UK), bcl-2 (1:1000, ab32124, Abcam, Cambridge, UK), and cleaved caspase-3 (1:500, ab2302, Abcam, Cambridge, UK) overnight at 4 • C and then incubated with a HRP conjugated goat anti-rabbit IgG (1:1000; cat. no. 40295G; BIOSS). The membranes were exposed with the FlourChem FC3 Imaging System (proteinsimple, USA). Densitometric analysis was performed using ImageJ 7.0 software.
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