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45 protocols using ab205270

1

Immunostaining Protocols for Cells and Tissue Sections

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For cultured cells, immunostaining was performed as previously described (X. Xu et al., 2020 (link)). Primary antibodies included rabbit anti‐YAP (ab205270, Abcam, 1:200), mouse anti‐YAP (WH0010413M1, Sigma, 1:200), mouse anti‐GFAP (MAB360, Millipore, 1:500), and rabbit anti‐Lamin B1 (ab16048, Abcam, 1:200).
For staining of tissue sections, immunostaining was conducted as previously described (C. Xie et al., 2020 (link)). Primary antibodies included rabbit anti‐YAP (ab205270, Abcam, 1:200), mouse anti‐YAP (WH0010413M1, Sigma, 1:200), mouse anti‐GFAP (MAB360, Millipore, 1:500), mouse anti‐NeuN (ab177487, Abcam, 1:500), goat anti‐Iba1 (ab5076, Abcam, 1:500), rabbit anti‐Lamin B1 (ab16048, Abcam, 1:200), and rabbit anti‐Ki67 (AB9260, Millipore, 1:200). Mounting was done after another three washes. Images were acquired by using a fluorescence microscopy or a confocal microscopy (Zeiss) and analyzed by Image J software.
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2

Evaluating Active YAP Expression in Tissue Microarrays

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In vivo active YAP expression was detected by IHC using tissue microarrays (PA2081a, AlenaBio, Xi'an, China). The tissues were incubated with primary anti-active-YAP antibody (1:100, ab205270, Abcam) and biotin-conjugated secondary antibody. Hematoxylin was used as the counterstain. Immunostaining degree of each sample was evaluated independently by two pathologists based on nuclear staining intensity (0, negative; 1, weak; 2, moderate; 3, strong) and the percentage of positive cells (0, <5% positive cancer cells; 1, 6-25% positive cancer cells; 2, 26-50% positive cancer cells; 3, 51-75% positive cancer cells; 4, ≥76% positive cancer cells). The final immunoreactivity score was calculated as the product of the intensity score and the extent score.
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3

Protein Extraction and Western Blot Analysis

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OE tissues were lysed in lysis buffer for 30 min on ice. The lysis buffer consisted of 50 mM Tris-HCl (pH 7.4), 150 mM NaCl, 1% NP-40, 0.5% Triton X-100, 5 mM sodium fluoride, 1 mM EDTA, 1 mM phenylmethylsulfonylfluoride, 2 mM sodium orthovanadate, and a protease inhibitor cocktail (P8340, Sigma). The lysates were then centrifuged at 12,000 rpm for 30 min to obtain the suspended proteins. The proteins were extracted after adding 5× loading buffer and denatured at 100°C for 10 min before being separated by SDS-PAGE (8%–12%). The proteins were then transferred into nitrocellulose membranes (Life Sciences) and immersed in 5% skim milk for blocking at room temperature for 1 h, followed by an overnight incubation with primary antibodies at 4°C, then rinsed with Tris-buffered saline with Tween 20 and incubated for 1 h at room temperature after adding the appropriate secondary antibodies (1:5,000, Bio-Rad). Primary antibodies included anti-p-YAP (Ser127, 1:1,000, #4911, CST), anti-YAP (1:1,000, ab205270, Abcam), anti-TAZ (1:1,000, DF4653, Affinity), anti-MOB1 (1:1,000, #13730, CST), and anti-p-MOB1 (Thr35, 1:1,000, #8699, CST). Anti-GAPDH (1:5,000, #2118, CST) and anti-β-actin (1:10,000, A5316, Sigma) were used as loading controls. Protein bands were detected through ECL (Bio-Rad), and analyzed by Quantity One software (Bio-Rad).
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Immunohistochemical analysis of SCLC

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A total of 37 formalin-fixed, paraffin-embedded tissues were obtained from patients diagnosed with SCLC by bronchofiberscopy or biopsy between January 2012 and March 2015. All patients received care and follow-up in our hospital. Informed consent was obtained under the protocol approved by our hospital's ethics committee. The clinical characteristics are summarized in Table 1.
The endogenous peroxidase activity was blocked by soaking the deparaffinized specimens in 3.3% H2O2. The specimens were then incubated with primary antibodies (MST2, 1 : 200, ab87322, abcam; pMST2 (phosphor Thr180), 1 : 200, PA5-104616, Invitrogen; YAP1, 1 : 100, ab205270, abcam; pYAP1 (phosphor S127), 1 : 100,ab76252, abcam; CD133, 1 : 100, ab216323, Abcam) and the corresponding secondary antibodies [20 (link)]. Semiquantitative results were obtained by using the German semiquantitative scoring method, as previously described [21 (link)].
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5

Comprehensive Western Blotting Protocol

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Western blotting was carried out as described previously (X. Xu et al., 2020 (link)). Primary antibodies used in this study including rabbit anti‐YAP (ab205270, Abcam, 1: 1, 000), mouse anti‐YAP (WH0010413M1, Sigma, 1:1, 000), rabbit anti‐p‐YAP (#13008, CST, 1:1, 000), rabbit anti‐LATS1 (#3477, CST, 1:1, 000), rabbit anti‐p‐LATS1 (ser909) (#9157, CST, 1:1, 000), rabbit anti‐MST1 (#3682, CST, 1:1, 000), rabbit anti‐p‐MST1/2 (Thr183/Thr180) (#49332, CST, 1:1, 000), rabbit anti‐SAV1 (#13301, CST, 1:1, 000), rabbit anti‐p‐MOB1 (Thr35) (#8699, CST, 1:1, 000), rabbit anti‐p53 (bs‐2090R, Bioss, 1:1, 000), rabbit anti‐Lamin B1 (ab16048, Abcam, 1: 1, 000), mouse anti‐CDK6 (#3136T, CST, 1:1, 000), rabbit anti‐FOXM1 (AV39518, Sigma, 1: 1, 000), and mouse anti‐PHD1 (F5303, Sigma, 1: 1, 000). Mouse anti‐β‐actin (A5316, Sigma, 1:10, 000) or rabbit anti‐GAPDH (#2118, CST, 1:5, 000) was used as a loading control. The protein signals were detected using ECL detection kit (Bio‐Rad) and analyzed using Quantity One software (Bio‐Rad).
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TGR5 Signaling Pathway Regulation

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Antibodies plasmids and chemicals used in the study were listed: GAPDH (sc-47724, Santa cruz biotechnology, for western blotting), YAP1 (ab205270, abcam, for western blotting; sc-376830, Santa cruz biotechnology, for Immunofluorescence (IF) and Immunohistochemistry), p-YAP(Ser127) (ab76252, abcam, for western blotting), CYR61 (26689-1-AP, proteintch, for western blotting), c-Myc (ab32072, abcam, for western blotting), CyclinD1 (ab16663, abcam, for western blotting), LaminB1 (PB9611, Boster, for western blotting), RhoA (#2117, CST, for western blotting), ROCK1 (ab134181, abcam, for western blotting), PKA C-ɑ(#4782, CST, for western blotting), TGR5 (ab72608, abcam, for western blotting, for IF and Immunohistochemistry), and Ki67 (#9449, CST, for Immunohistochemistry). Ursodeoxycholic acid was obtained from Target Mol (Shanghai, China), while INT-777 was obtained from Medchemexpress. TGR5 receptor antogonist SBI-115, H89, and SQ22536 were purchased from Selleck, while KT5720 was purchased from Sigma.
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7

Phospho-STAT3 T622 Antibody Production

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Rabbit polyclonal antibody recognizing phosphorylated STAT3 T622 was customized from Boer Biotechnology. To prepare antibody recognizing STAT3 pT622, rabbits were treated with peptide containing STAT3 pT622. Nonmodified peptide immobilized on an affinity column was used to remove the antibodies recognizing nonphosphorylated STAT3, and STAT3 pT622 peptide immobilized on an affinity column was used to associate with and isolate the antibodies. The eluted antibodies were then concentrated.
Antibodies recognizing TAZ (#83669), STAT3 (#9139), MST2 (#3952), MST1 (#14946), YAP1 (#12395), SAV1 (#13301), and STAT3‐pY705 (#9145) were obtained from Cell Signaling Technology. Antibody simultaneously recognizing LATS1 and LATS2 (BS‐4081R) was obtained from Bioss. Antibodies recognizing LATS1/2 pT1079/T1041 (ab111344), Ki67 (ab16667), YAP1 (ab205270), HA (ab9110), tubulin (ab7291), Flag (ab205606), GST (ab36415), YAP1 pS127 (ab76252), phospho‐Thr (ab9337), JAK2 (ab108596), and recombinant IL‐6 protein (ab9627) were purchased from Abcam. Anti‐Flag agarose beads were obtained from Sigma. XMU‐MP‐1 was obtained from MedChemExpress. [γ‐32P]‐ATP was obtained from MP Biomedicals.
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8

Antibody Panel for Cellular Signaling

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All antibodies used in this study were listed below: Anti-CYLD (ab137524, abcam), Anti-ACSL4 (ab205199, abcam), Anti-TFRC (ab214039, abcam), Rabbit monoclonal Anti-YAP (ab205270, abcam), Mouse monoclonal Anti-YAP (66900-1-Ig, Proteintech), Anti-GAPDH (92310SF, CST), Anti-ki67 (28074-1-AP, Proteintech), anti-cyclin D1 (WL01435a), anti-SLC7A11 (T57046, abmart), anti-FSP1 (T55799, abmart), anti-GCH1 (MG880265, abmart) and anti-GPX4 (ab262509, abcam).
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9

Immunofluorescence Staining of YAP and TAZ

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The BMSCs were fixed in paraformaldehyde for 30 min. Then, 0.2% Triton X-100 was used for permeation at room temperature for 20 min and the cells were rinsed 3 times with PBS. The samples were blocked with 5% sheep serum at room temperature for 60 min and incubated with primary antibodies against YAP (1:300; Abcam, ab205270) and TAZ (1:250; Abcam, ab84927) at 4℃ overnight. Subsequently, Cy3-labeled secondary antibody (1:1000; KPL, 072011506) was used for 2 h of incubation at room temperature avoiding light. Then, 0.01 mol/L of PBST was used for 4 times of rinsing away from light. The images were observed under a fluorescence microscope after the 50 µl of anti-quenching agent containing DAPI was added.
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10

Tumor Histology and Protein Expression

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Tumor tissue paraffin blocks were cut into 4 µm tumor paraffin slices for HE staining using an HE kit (ab245880; Abcam, Cambridge, UK). The sections were then dehydrated, made transparent, sealed, and observed under a microscope. The degree of inflammatory cell infiltration and the proportion of metastatic tumor cells are tumor histological evaluation indicators (Kajioka et al., 2021 (link); Xiao et al., 2021 (link)). The higher the score, the more severe was the degree of infiltration and metastasis. After inactivation and antigen repair, the blocked-dewaxed slices were incubated with anti-Ki67 (1:200, ab16667; Abcam) and anti-YAP1 (1:500, ab205270, Abcam) antibodies at 37 °C for 2 h. Thereafter, the samples were treated with Rabbit IgG H&L antibody (1:5000, ab97080; Abcam) and incubated with hematoxylin (Bry-0001-01/03/04; Runnerbio, China) for 4 min at 25 °C. Sections were observed using a microscope (Eclipse E100; Nikon, Tokyo, Japan).
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