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3 protocols using anti p18ink4c

1

Western Blot Analysis of Signaling Proteins

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Cell lysates were harvested by RIPA lysis buffer on ice. An equal amount of 20 μg total cell lysates were separated on 8%‐12% SDS‐PAGE gel and electrophoretically transferred to polyvinylidene fluoride (PVDF) membranes. Following blocking with 5% BSA at room temperature for 2 hours, membranes were then incubated with primary antibodies overnight at 4°C. Finally, membranes were detected with the SuperSignal West Dura Extended Duration Substrate (Thermo Scientific). The following antibodies were used to explore protein expression: anti‐SLC35F2 antibodies (AV43971, Sigma‐Aldrich), anti‐β‐actin (#4970), anti‐CDK2 (#2546), anti‐CDK4 (#12790), anti‐CDK6 (#13331), anti‐Cyclin D1 (#2978), anti‐Cyclin D3 (#2936), anti‐p27 Kip1 (#3686), anti‐p21 Waf1/Cip1 (#2947), anti‐p18 INK4C (#2896), anti‐ERK1/2 (#4695), anti‐p‐ERK1/2 (Thr202/Tyr204, #4370), anti‐JNK (#9252), anti‐p‐JNK (Thr183/Tyr185, #4668), anti‐p38 MAPK (#8690), anti‐p‐p38 MAPK (Thr180/Tyr182, #4511), anti‐ASK‐1 (#8662), anti‐phosphorylation of apoptosis signal‐regulating kinase 1 (p‐ASK‐1) (Thr845, #3765) (Cell Signaling Technology) and anti‐TGFBR1 (CY2905, Abways, China).
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2

Western Blot Analysis of Cell Cycle Regulators

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Western blots were performed using anti-DNMT3A (Abcam, Cambridge, UK) and mouse anti-cyclinD1, anti-CDK4, anti-CDK6, anti-p18INK4C, and anti-CDKN1B which were purchased as part of a Cell Cycle Regulation Sampler Kit (Cell Signaling Technology). Mouse anti-β-actin was obtained from Sigma-Aldrich. Protein detection was performed with Super Signal Chemiluminescence Substrate (Pierce, USA).
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3

Western Blot Analysis of Protein Expression

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HK1, HNE1, and CNE2 cell lines were transfected as described above. After 48 h transfection, proteins were extracted in the defined volume of RIPA lysis buffer containing 1.0 mM PMSF, protease inhibitor cocktail and DTT, and 50 μg proteins was loaded in SDS-PAGE gel electrophoresis10 (link). The proteins were transferred to PVDF Membrane (Milipore, Darmstadt, Germany) which were incubated with following primary antibodies: anti-HBP1 (Milipore, Darmstadt, Germany), anti-ZO-1, anti-E-cadherin, anti-N-cadherin, anti-Vimentin, anti-β-catenin, anit-MMP9, anti-NF-κB, anti-caspase 3 and cleaved caspase 3, anti-caspase 7, anti-PARP and cleaved PARP, anti-caspase 9 and cleaved caspase 9, anti-p18INK4C (p18), anti-p21Waft/Cip1 (p21), anti-p27Kip1 (p27), anti-Cyclin D1, anti-Cyclin D3, anti-CDK2, anti-CDK4, anti-CDK6 (Cell Signaling Technology, Danvers MA, USA), and β-actin (ABclonal, Cambridge, MA, USA) as an internal reference. Then the PVDF Membranes were incubated with HRP-linked anti-Rabbit or anti-Mouse IgG antibody according to the isotypes of the primary antibody. The membrane was imaged using ChemiDoc MP System (Bio-Rad, Hercules, CA, USA) and the images were analyzed using Image Lab Software (Bio-Rad, CA, USA).
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