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17 protocols using anti ldha

1

Immunohistochemical Evaluation of Glycolytic Enzymes

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The IHC staining was used to examine the expression levels of c-Myc and glycolytic enzymes. The paraffin-embedded sections were incubated in a pressure cooker containing antigen retrieval buffer (pH 6.0) (Solarbio; G1202). Next, the slides were uniformly covered with 3% bovine serum albumin (Solarbio; A8020), and probed with the following primary antibodies prepared in a wet box at 4 °C overnight: anti-c-Myc (Servicebio; GB13076), anti-GLUT1 (Proteintech, 21,829–1-AP), anti-ENO1 (Proteintech, 11,204–1-AP), anti-PGK1 (Proteintech, 17,811–1-AP), anti-ALDOA (Proteintech, 11,217–1-AP), anti-HK1 (Proteintech, 19,662–1-AP), and anti-LDHA (Proteintech, 19,987–1-AP) antibodies. Next, the horseradish peroxidase (HRP)-labeled secondary antibody was used for 50 min. Then, the sections were then counterstained with hematoxylin.
The stained sections were scanned using Pannoramic MIDI and analyzed using Quant Center, which automatically identified all the strongly positive, moderately positive, weakly positive, and negative areas in the tissue sections. The H-scores were calculated as ∑ (percentage of intensity × intensity). The staining intensity was divided into three categories—strong, moderate, and weak—and the corresponding score was 3, 2, and 1, respectively.
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2

Immunocytochemical Analysis of HEI-OC1 Cells

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1×105 HEI-OC1 cells were seeded on cell climbing slices coated with poly-D-lysine in 24 well plates. When confluence was close to 60–80%, cell climbing slices were fixed with 4% paraformaldehyde for 20 min, permeabilized with 1% Triton X-100 for 10 min and then blocked in 10% goat serum for 1 h. Cells were then incubated with primary antibodies overnight. The primary antibodies included anti-GLUT1 (1:500, Abcam), anti-LDHA (1:250, Proteintech), and anti-HIF-1α (1:200, Abcam). The following morning, the cells were washed and incubated with CoraLite488-conjugated goat anti-rabbit/mouse IgG(H + L) (1:250, Proteintech) for 1 h. Cell climbing slices were then sealed with a mounting medium containing DAPI (Abcam, United States), and photographic images were acquired by confocal microscopy (Leica, Italy). Each experiment was repeated three independent times.
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3

Investigating TSLP Signaling in HDM-Induced Inflammation

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House dust mites (HDM, ALK-Abello A/S, Denmar), Recombinant Human long-isoform TSLP (lTSLP) was obtained from R&D systems. Synthetic sfTSLP peptides (63aa: MFAMKTKAALAI WCPGYSETQINATQAMKKRRKRKVTTNKCLEQVSQLQGLWRRFNRPLLKQQ) were prepared by China Peptides (Shanghai, China). 3-PO (3-(3-pyridinyl)-1-(4-pyridinyl)-2-propen-1-one) and BAY 87-2243 (Selleck, China). Rabbit anti-HIF-1α, anti-LDHA, anti-PHD and anti-VHL (proteintech, China), Rabbit anti-STAT5, anti-p-STAT5, anti-JAK1, anti-p-JAK1, anti-JAK2and anti-p-JAK2 (Cell Signaling Technology, USA), Rabbit anti-TSLPR and mouse anti-IL-7R (santa curz, USA). Rabbit anti-TSLP (Abcam, USA).
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4

Immunofluorescence Staining of Cell Markers

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1 × 105 cells were seeded on cell climbing slices coated with poly-D-lysine in 24 well plates. Prepared cells were fixed in 4% PFA for 20 min, permeabilized with 0.5% Triton X-100 for 5 min, and blocked in 10% goat serum for 1 h at room temperature. The following primary antibodies were incubated overnight at 4 °C: anti-LDHA (1:250, Proteintech), anti-β-catenin (1:200, Proteintech), or anti-HIF-1α (1:200, Abcam; 1:100 Proteintech). Next day, cells were incubated with secondary antibodies for 1.5 h at room temperature: CoraLite594-conjugated goat anti-rabbit IgG(H + L) (1:250, Proteintech), CoraLite488-conjugated goat anti-mouse IgG(H + L) (1:250, Proteintech). Cell climbing slices were mounted on slides with mounting medium containing DAPI and photographed by a TCS SP8 confocal laser scanning microscopy (Leica, Italy) or an Axio Scope A1 microscope (Zeiss, Germany) at 400× magnification.
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5

Immunohistochemical Analysis of Cancer Markers

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Tissue slices were fixed, embedded, deparaffinized, and blocked. The sections were incubated with anti-FOXQ1 (Proteintech, Cat No. 23718-1-AP), anti-KI67 (Servicebio, Cat No. GB111499), anti-PCNA (Servicebio, Cat No. GB11010), anti-N-cadherin (Cell Signaling Technology, Cat No. 13116), anti-Vimentin (Signalway, Cat No. 33541), and anti-LDHA (Proteintech, Cat No. 66287-1-Ig) antibodies at 4 °C overnight. After washing with phosphate-buffered saline (PBS), the sections were incubated in a secondary antibody (Proteintech, Cat No. PR30009) for 1 h at room temperature. Hematoxylin re-staining, imaging, and DAB staining were then performed using standard procedures. Two different pathologists independently assessed the findings.
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6

Protein Expression Analysis in Tumors

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We performed immunohistochemical staining and western blotting using methods that have been described previously [24 (link)]. Anti-YAP (1:100, immunohistochemistry), Anti–phosphorylated-YAP (p-YAP) (Ser127) (1:1000, western blot), and anti–p-LATS1 (Ser909) (1:1000, western blot) were from Cell Signaling Technology (Shanghai, China). Anti-YAP (1:1000, western blot), anti-LDHA (1:1000, western blot), anti-PKM2 (1:1000, western blot), anti-Glut1 (1:1000, western blotting), anti-PGK1 (1:1000, western blot), anti–large tumor suppressor kinase 1 (LATS1, 1:1000, western blotting), and anti–HIF-1α (1:1000, western blot) rabbit monoclonal antibodies were from Proteintech (Wuhan, China). Anti–matrix metalloproteinase 2 (MMP2, 1:1000, western blot), anti-MMP9 (1:1000, western blot), horseradish peroxidase–linked secondary antibody (1:5000, western blot), and anti–β-actin (1:3000, western blot) were from Abbkine (Wuhan, China). The protein bands were analyzed with Image J software (National Institutes of Health, Bethesda, MD, USA).
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7

Protein Expression Analysis via Western Blotting

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We performed western blotting (WB) according to standard procedures. The following primary antibodies were used: anti-Hnrnpk (Abcam 39975, 1:5000), anti-Bax (Cell Signaling Technology 14796, 1:1000), anti-p21 (Abcam 109520, 1:1000), anti-Ihh (Abcam 52919, 1:1000), anti-Runx2 (Abcam 192256, 1:1000), anti-Mmp13 (Abcam 219620, 1:500), anti-Sox9 (Abcam 185966, 1:1000), anti-Hif1α (Cell Signaling Technology 36169, 1:250), anti-Gapdh (Proteintech 60004-1, 1:2000), anti-Pfkfb3 (Abcam 181861, 1:500), anti-Ldha (Proteintech 19987, 1:2000), and anti-β-Actin (Affinity AF7018, 1:2000). The following secondary antibodies were used: goat anti-rabbit IgG H&L (Abcam ab205718, 1:2000) and goat anti-mouse IgG H&L (Abcam ab205719, 1:2000). The Densitometry analysis of WB was exerted using software Image J (v 1.51). The original western blots were shown in the Supplementary material Western blots.
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8

Immunohistochemical Analysis of Tumor Markers

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Tumour tissues were fixed with 4% paraformaldehyde and cut into 4‐μm‐thick sections. Immunohistochemistry (IHC) was performed according to the protocol. The sections were incubated with rabbit anti‐FOXM1 (1:100, 20,459, CST), anti‐PDK1 (1:100, 18,262‐1‐AP; Proteintech), anti‐GLUT1 (1:200, 66,290‐1‐Ig; Proteintech), anti‐ LDHA (1:200, 66,287‐1‐Ig; Proteintech) and anti‐HK2 (1:100, 22,029‐1‐AP; Proteintech) antibodies overnight at 4°C. The sections were then sequentially incubated with a biotinylated secondary antibody (PV‐9000; ZSGB‐Bio) to detect the primary antibodies. Images were obtained using TissueFAXS systems (TissueGnostics).
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9

Immunoblotting Analysis of Metabolic Proteins

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Proteins were extracted from cells using RIPA lysis buffer (Solarbio, Beijing, China) containing protease and phosphatase inhibitors. Protein concentrations were determined using a BCA protein quantification kit (Solarbio, Beijing, China). Equal amounts of protein (20 µg) were separated on 10% SDS-PAGE gels and transferred to PVDF membranes (#ISEQ00010, Millipore, Billerica, MA, USA). Membranes were then blocked in blocking buffer (TBST solution with 5% skim milk) for 1 h at room temperature and incubated with primary antibodies overnight at 4 °C. The following day, the membranes were washed. Then, the membranes were incubated with the secondary antibody (1:5000) for 1 h at room temperature. Protein bands were visualized using an ECL kit (#P0018M-2, Beyotime, Beijing, China), with β-actin serving as the internal loading control. Protein expression was analyzed using Image J software (version 2.3.0). The primary antibodies used included anti-β-actin (Proteintech, Chicago, IL, USA), anti-SRSF7 (Proteintech, Chicago, IL, USA), anti-PKM1 (Proteintech, Chicago, IL, USA), anti-PKM2 (PTM BIO, Hangzhou, China), anti-LDHA (Proteintech, Chicago, IL, USA), and anti-GLUT1 (Proteintech, Chicago, IL, USA).
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10

Immunohistochemical Evaluation of Protein Expression

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Paraffin sections were baked for 1 hour at 65°C for deparaffinization and rehydration. After inhibition of endogenous peroxidase activity for 30 minutes with methanol containing 0.3% H2O2, the sections were blocked with 2% BSA in PBS for 30 minutes and then incubated with anti‐p53 (dilution 1:1000; Proteintech, Rosemont, IL, USA), anti‐LDHA (dilution 1:1000; Proteintech), anti‐p21 (dilution 1:500; Proteintech, Rosemont, IL, USA), anti‐CCND1 (dilution 1:100; CST, Danvers, MA, USA), anti‐cleaved‐poly ADP ribose polymerase (PARP) (dilution 1:100; CST) and anti‐ki67 (dilution 1:500; CST, Danvers, MA, USA). The immune complex was visualized using the MaxVision HRP‐polymer IHC Kit Detection System, Peroxidase/DAB, Rabbit/Mouse (MaxVision, Fuzhou, China) according to the manufacturer's protocol. The nuclei were counterstained with hematoxylin (Beyotime Biotechnology). Regarding IHC analysis scores, IHC staining was evaluated at 200× magnification using light microscopy. A semiquantitative evaluation of p53, LDHA, CCND1, p21, c‐PARP and ki67 protein was done using a method described in our previous studies.16, 17, 18, 19
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