bcpap  (CLS Cell Lines Service GmbH)

Journal: Translational Cancer Research

Article Title: Identification of papillary thyroid carcinoma-associated epithelial cell subpopulations and diagnostic biomarkers: integrating machine learning with single-cell analysis

doi: 10.21037/tcr-2025-aw-2244

Figure Lengend Snippet: qRT-PCR validation of hub gene expression in PTC and normal thyroid cells. (A) Relative mRNA expression levels of XPR1 in BCPAP and NC cells, showing significant upregulation in BCPAP. (B) Relative mRNA expression levels of SH3RF1 in BCPAP and NC cells, demonstrating marked downregulation in BCPAP. (C) Relative mRNA expression levels of TLE1 in BCPAP and NC cells, indicating significant downregulation in BCPAP. ***, P<0.001. BCPAP, papillary thyroid carcinoma cell line; GAPDH, glyceraldehyde-3-phosphate dehydrogenase; mRNA, messenger RNA; NC, normal thyroid epithelial cell; PTC, papillary thyroid carcinoma; qRT-PCR, quantitative real-time polymerase chain reaction.

Article Snippet: The PTC cell line (BCPAP) and normal thyroid epithelial cells (NC) were purchased from Procell Life Science & Technology Co., Ltd. (Wuhan, China).

Techniques: Quantitative RT-PCR, Biomarker Discovery, Gene Expression, Expressing, Real-time Polymerase Chain Reaction

Journal: bioRxiv

Article Title: Dual targeting of PDPK1 and BRAF V600E is synthetically lethal

doi: 10.64898/2026.03.15.711663

Figure Lengend Snippet: (A) Immunobloting of pPDPK1, PDPK1, pMEK, and MEK in thyroid cancer lines: papillary thyroid cancer (PTC, brown color) (TPC1), follicular thyroid cancer (FTC, blue color) (FTC-133 and FTC-236), poorly differentiated thyroid cancer (PDTC, green color) (BCPAP), BRAF wild type anaplastic thyroid cancer (ATC) (red color) (C643 and THJ29T), BRAF V600E–mutant ATC (8505C, SW1736, and THJ16T), and HEK293 cells using β-actin as a loading control. The relative ratio of pPDPK1 to total PDPK1 and pMEK to total MEK is listed below each phospho-protein compared to HEK293 cells. (B) Immunoblotting of phosphoPDPK1, total PDPK1 in untreated and dabrafenib (Dab) and trametinib–treated patient derived ATC and normal thyroid tissues using β-actin as a loading control. The relative ratio of pPDPK1 to total PDPK1 and pMEK to total MEK is listed below each phospho-protein compared to normal thyroid tissue. (C–D) Dose-dependent inhibition of cell proliferation with BX795 treatment in 8505C and SW1736 cells after 48 h. (E–F) Dose-dependent inhibition of cell proliferation with Dab treatment in 8505C and SW1736 ATC cells after 48 h. (G–H) Analysis of the combination index (CI) using the CompuSyn software for BX795, Dab, and their combination in BRAF V600E–mutant ATC cell lines. CI < 1 indicates synergism, and fa denotes fraction affected. (I–J) The effect of BX795 (2.5 µM), Dab (2.5 µM), and their combination on cellular proliferation in 8505C and SW1736 cells after 48 h. (K–L) Colony-formation assay in 8505C and SW1736 cells treated with BX795 (2.5 µM), Dab (2.5 µM), or their combination. Quantification was performed using ImageJ. (M–N) Cellular migration as measured with a wound-healing assay in 8505C and SW1736 cells treated with BX795 (2.5 µM), Dab (2.5 µM), or their combination. Quantification was performed using the ImageJ software. (O–P) Concentration-dependent effects of BX795 treatment on proliferation of patient-derived ATC cells (ATC01 and ATC02). ATC01 was derived from a treatment-naïve patient tumor positive for BRAF V600E mutation, and ATC02 was derived from a residual tumor in a patient with an exceptional treatment response to Dab and trametinib, and the tumor was positive for BRAF V600E mutation. (Q–R) The effects of treatment with BX795 (2.5 µM), Dab (2.5 µM), or their combination on the proliferation of patient-derived ATC cells (ATC01 and ATC02). (S) The effect of treatment with BX795 (2.5 µM), Dab (2.5 µM), or their combination on ATC spheroids in BRAF V600E–mutant in the 8505C and SW1736 cell lines. (T) The effect of treatment with BX795 (2.5 µM), Dab (2.5 µM), or their combination on patient-derived ATC spheroids (ATC01 and ATC02). All data are presented as the mean ± standard deviation. Statistical significance is indicated as ns = nonsignificant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001.

Article Snippet: The BCPAP (homozygous mutated BRAF V600E) cell line was purchased from Leibniz Institute DSMZ (Lower Saxony, Germany).

Techniques: Western Blot, Mutagenesis, Control, Derivative Assay, Inhibition, Software, Colony Assay, Migration, Wound Healing Assay, Concentration Assay, Standard Deviation

Journal: bioRxiv

Article Title: Dual targeting of PDPK1 and BRAF V600E is synthetically lethal

doi: 10.64898/2026.03.15.711663

Figure Lengend Snippet: (A) Mutated BRAF V600E ATC cells (8505C) were treated for 48 h with BX795 (2.5 µM), dabrafenib (Dab) (2.5 µM), or their combination. Then, total and phosphorylated protein levels were measured using mass spectrometry. (A–C) The volcano plots show significantly upregulated proteins in red, significantly downregulated proteins in blue (p < 0.05), and non-significant proteins in gray. The x-axis represents log 2 fold change, and the y-axis shows –log 10 (p-value). The dashed lines indicate thresholds for statistical significance and fold change. (D) The Venn diagrams shows shared and treatment-specific differentially expressed proteins and phosphorylated proteins across the treatment groups (p < 0.05). The overlapping regions represent a conserved core proteomic response, while the non-overlapping regions indicate pathway-specific effects of PDPK1 or BRAF inhibition. (E–G) Gene set enrichment analysis (GSEA) of ranked phosphorylated site changes following BX795 (E), Dab (F), or combination (G) treatment. The bar plots show normalized enrichment scores (NES) for Hallmark Kyoto Encyclopedia of Genes and Genomes (KEGG) signaling pathways. (H) Western blot analysis of the effect of BX795 (2.5 µM), Dab (2.5 µM), or combination treatment on BRAF V600E–mutant ATC cell lines (8505C and SW1736) after 48 h. pMEK, total MEK, pAKT 308 , total AKT, pPDPK1 S241 , PARP-1, BCL2, and caspase-3 protein levels are shown, with β-actin used as a loading control. (I) Flow cytometry results of Annexin V/PI staining with BX795 (2.5 µM), Dab (2.5 µM), or combination treatment. (J) Western blot analysis of apoptosis regulatory proteins 40 h after treatment. pBAD S112 , BAD, BCL2, pGSK3β Ser9 , GSK3β, and the double-stranded DNA damage marker pH2AX S139 are shown, with β-actin used as a loading control. Protein band density was measured and normalized to β-actin. The phosphorylated to total protein ratios were measured, and the values are listed above the phosphoprotein band. Protein band density of BCL-xL and pH2AX S139 were also measured and normalized to β-actin. (K) Immunoprecipitation of BCL-xL and BCL2 with BAD 30 h after treatment with BX795 and Dab in BRAF V600E–mutant ATC cell lines. Protein band density was measured and normalized to the input protein band. The ratio of immunoprecipitated to total input protein was measured and is listed below the protein blot. P = phosphorylation. The superscript indicates the amino acid phosphorylation site. (L) The heatmap shows z-scored log 2 -transformed abundance of apoptosis-related proteins for the BX795, Dab, and combination treatment groups in 8505C ATC cells. The proteins are displayed in sequential order—BAD, TNFRSF10A, PARP1, FAS, BID, CASP3, CASP8, BAX, CASP9, CASP7, BCL2L1, and BAK1—with hierarchical clustering applied to the rows. (M) The effect of BX795 (2.5 µM), Dab (2.5 µM), or combination treatment for 16 h on γH2AX foci formation in the 8505C and SW1736 ATC cell lines using immunofluorescence. γH2AX was labelled with Alexa Fluor™ 546 secondary antibody, with DAPI used for nuclear staining. A Zeiss LSM 800 confocal microscope was used to examine the cells (400× magnification). The number of foci per cell was quantified using ImageJ. All data are presented as the mean ± standard error of the mean of 25 cells. Statistical significance is indicated as ns = nonsignificant; *p < 0.05; **p < 0.01; ***p<0.001; ****p < 0.0001. (N) Western blot analysis of the effect of BX795 (2.5 µM), Dab (2.5 µM), or combination treatment for 16 h on DNA damage–dependent proteins (pATM, total ATM, pCHK2, Total CHK2, and pCHK1). β-Actin was used as a loading control. (O) Cell cycle analysis after BX795 (2.5 µM), Dab (2.5 µM), or combination treatment for 16 h in BRAF V600E–mutant ATC cell lines (8505C and SW1736). Cells were stained with propidium iodide (PI) and analyzed by fluorescence-activated cell sorting. The DNA content was measured, 2N (diploid) and 4N (tetraploid), based on the PI-stained DNA content. (P) The effect of BX795 (2.5 µM), Dab (2.5 µM), or combination treatment for 16 h on DNA repair proteins—cyclin D, cyclin B, pcdc25c, pCDK1, total CDK1, pH3A, H3A, and cyclin A2—by immunoblotting. β-actin was used as a loading control. The ratio of phospho-H3A to total H3A was measured and is listed below the phospho-H3A protein band. All data are presented as the mean ± standard deviation. Statistical significance is indicated as ns = nonsignificant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001. (Q) Analysis of the effect of combination BX795 (2.5 µM) and Dab (2.5 µM) treatment for 16 h followed by proteasomal degradation inhibition for 6 h (MG132, 10 µM). Protein band density was measured and normalized to β-actin. (R) The heatmap shows z-scored log2-transformed phosphorylation levels of DNA damage response, DNA repair, and cell-cycle regulatory proteins for the BX795, Dab, and combination treatment groups in 8505C ATC cell line. Proteins are displayed in sequential order as RAD50, CDK1, MCM2, PRKDC, RB1, TP53BP1, TP53, XRCC1, XRCC5, LIG1, MDC1, and MSH6, with supervised hierarchical clustering applied to the rows. The color scale represents relative protein levels (red = higher; blue = lower).

Article Snippet: The BCPAP (homozygous mutated BRAF V600E) cell line was purchased from Leibniz Institute DSMZ (Lower Saxony, Germany).

Techniques: Mass Spectrometry, Inhibition, Protein-Protein interactions, Western Blot, Mutagenesis, Control, Flow Cytometry, Staining, Marker, Immunoprecipitation, Phospho-proteomics, Transformation Assay, Immunofluorescence, Microscopy, Cell Cycle Assay, Fluorescence, FACS, Standard Deviation

Journal: bioRxiv

Article Title: Dual targeting of PDPK1 and BRAF V600E is synthetically lethal

doi: 10.64898/2026.03.15.711663

Figure Lengend Snippet: Mutated BRAF V600E cell were treated with BX795 (2.5 µM), Dab (2.5 µM), or their combination. (A) Total cellular ROS was measured using the DCFH-DA fluorescent dye and quantified with flow cytometry. (B) Mitochondrial superoxide was measured based on MitoSOX red fluorescence, quantified with flow cytometry. (C–D) The mitochondrial content was assessed by MitoTracker green fluorescence, as quantified by flow cytometry and visualized with live-cell confocal microscopy (Zeiss LSM 800, 400× magnification). (E) The mitochondrial membrane potential was evaluated by TMRM (100 nM) fluorescence and analyzed by flow cytometry. (F) The oxygen consumption rate (OCR) was measured using a Seahorse analyzer with sequential injections of oligomycin (Oligo), 2,4-dinitrophenol (DNP), and antimycin A plus rotenone (Rot+AA). The data were normalized to the total protein content, and maximal respiration and adenosine triphosphate (ATP)-linked respiration were quantified accordingly. (G) The heatmap shows z-scored log 2 -transformed abundance of proteins associated with mitochondrial oxidative phosphorylation, the tricarboxylic acid (TCA) cycle, mitochondrial ribosomal, transport, and mitochondrial dynamics–associated proteins in 8505C ATC cells treated with BX795 (2.5 µM), Dab (2.5 µM), or their combination. The proteins include representatives of electron transport chain complexes I–V (NDUF subunits, SDHA–D, UQCRC1/2, COX subunits, and ATP5 subunits), TCA cycle enzymes (IDH1, IDH2, IDH3, FH, OGDH, DLST, CS, MDH2, and PDHA1/PDHB), mitochondrial transport and structure (TOMM20, TIMM23, VDAC1–3, MFN1, OPA1, DNM1L), and mitochondrial genome maintenance (TFAM). Hierarchical clustering was applied to the rows. The color scale represents relative protein abundance (red = higher; blue = lower). All data are expressed as the mean ± standard deviation. Statistical significance is indicated as ns = nonsignificant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001.

Article Snippet: The BCPAP (homozygous mutated BRAF V600E) cell line was purchased from Leibniz Institute DSMZ (Lower Saxony, Germany).

Techniques: Flow Cytometry, Fluorescence, Confocal Microscopy, Membrane, Transformation Assay, Phospho-proteomics, Quantitative Proteomics, Standard Deviation

Journal: bioRxiv

Article Title: Dual targeting of PDPK1 and BRAF V600E is synthetically lethal

doi: 10.64898/2026.03.15.711663

Figure Lengend Snippet: (A) Time-dependent effect of combination BX795 and Dab treatment based on propidium iodide (PI) staining, showing the proportion of cells arrested in the G2/M phase. Cells were stained with PI and analyzed by fluorescence-activated cell sorting. The results are presented as the mean ± standard deviation. Statistical significance is indicated as ns = nonsignificant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001. (B) Intracellular ROS levels were measured using DCFH-DA staining and analyzed by flow cytometry. The results are presented as the mean ± standard deviation. (C–E) The effects of N -acetyl cysteine (NAC) (5 mM) on combination treatment–induced responses in BRAF V600E–mutant ATC cell lines. (C) ROS generation was analyzed by DCFH-DA staining and is presented as the mean ± standard deviation. (D) Apoptosis was assessed based on Annexin V/PI staining. (E) Immunoblot analysis of PARP-1 cleavage using β-actin as a loading control. The densitometric quantification of cleaved vs pro-PARP cleavage in relation to loading control is shown below the bands. (F) The effect of the mitochondrial ROS scavenger MitoQ on combination treatment–induced G2/M arrest in BRAF V600E–mutant ATC cell lines. The DNA content was measured, 2N (diploid) and 4N (tetraploid), based on PI staining. The results are presented as the mean ± standard deviation. Statistical significance is indicated as ns = nonsignificant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001. (G–H) The impact of CHK2 phosphorylation inhibitor BML-277 (ML277) on combination BX795 and Dab treatment-induced. (G) Cell cycle arrest was analyzed by PI staining and flow cytometry. (H) Antiproliferative effect in BRAF V600E–mutant ATC cells. The DNA content was measured, 2N (diploid) and 4N (tetraploid), based on PI staining. The results are presented as the mean ± standard deviation. Statistical significance is indicated as ns = nonsignificant; *P < 0.05; **P < 0.01; ***P < 0.001; ****P < 0.0001. (I) Apoptosis was measured with Annexin V/PI staining and flow cytometry. The results are presented as mean ± standard deviation. Statistical significance is indicated as ns = nonsignificant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001.

Article Snippet: The BCPAP (homozygous mutated BRAF V600E) cell line was purchased from Leibniz Institute DSMZ (Lower Saxony, Germany).

Techniques: Staining, Fluorescence, FACS, Standard Deviation, Flow Cytometry, Mutagenesis, Western Blot, Control, Phospho-proteomics

Journal: International Journal of Biological Sciences

Article Title: NOX4-derived oxidative DNA damage impairs thyroid differentiation through an epigenetic mechanism in BRAF-mutated radioactive iodine refractory papillary thyroid cancer cells

doi: 10.7150/ijbs.123980

Figure Lengend Snippet: Knockdown of NOX4 or p22 phox reduces oxidative-DNA damage. A) Western-blot analysis of NOX4 protein expression in nuclear fractions of thyrocytes and BRAF-mutated thyroid cells (n=2) B) Quantification of 8-oxoG of BRAF-mutated thyroid cells by FACS analysis of immune-stained 8-oxoG cells. The cells were transduced with siRNA control or siRNA against NOX4 or p22 phox for 72 h. Cells were incubated with an anti-8oxoG or a mouse IgG2B (isotype control). Graphs show the quantification of the fluorescence mean. Values are mean ± SE. *p < 0.05, **p < 0.01, and ***p < 0.001 (n = 3). C) Genomic distribution of γH2AX in BCPAP cells depleted or not for NOX4 (72h). Two replicates for each condition (siCtrl. and siNOX4) were pooled. D) Distribution of γH2AX on genome for BCPAP cells depleted or not for NOX4. The x axis corresponds to the position of the peaks along chromosomes; the y axis corresponds to the MACS2 score (-10*(log10(q_value)). E) γH2AX enrichment peaks on selected genes in conditions siRNA control and siRNA NOX4.

Article Snippet: For dabrafenib plus trametinib treatment, BCPAP cells were exposed to 100 nM dabrafenib (Selleck, #S2807) and 25 nM trametinib (Selleck, #S2673) for indicated time at 37 °C in DMEM with FCS, 8505C cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in RPMI with FCS and PDX cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in DMEM/F12 with FCS.

Techniques: Knockdown, Western Blot, Expressing, Staining, Transduction, Control, Incubation, Fluorescence

Journal: International Journal of Biological Sciences

Article Title: NOX4-derived oxidative DNA damage impairs thyroid differentiation through an epigenetic mechanism in BRAF-mutated radioactive iodine refractory papillary thyroid cancer cells

doi: 10.7150/ijbs.123980

Figure Lengend Snippet: Knockdown of NOX4 or p22 phox reduces the recruitment of OGG1, MSH2, and MSH6 to chromatin. A) Western-blot analysis of MSH6, MSH2, and OGG1 protein expression levels in cytosolic and chromatin fractions of BRAF V600E -mutated thyroid cells (n=2). B) Western blot analysis of NOX4 and p22 phox protein expression levels in nuclear fractions 72 h after knocking down of NOX4 or p22 phox by RNA interference in BCPAP cells. C) Western blot analysis of MSH6, MSH2, and OGG1 protein expression levels in chromatin fractions and whole-cell extracts 72 h after knockdown of NOX4 or p22 phox by RNA interference in BCPAP cells. Densitometry quantification of protein levels normalized to Lamin B or Vinculin levels and presented as chromatin enrichment or fold change compared with control cells. Values are mean ± SE. *p < 0.05, ***p < 0.001 and ****p<0.0001 (n = 3).

Article Snippet: For dabrafenib plus trametinib treatment, BCPAP cells were exposed to 100 nM dabrafenib (Selleck, #S2807) and 25 nM trametinib (Selleck, #S2673) for indicated time at 37 °C in DMEM with FCS, 8505C cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in RPMI with FCS and PDX cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in DMEM/F12 with FCS.

Techniques: Knockdown, Western Blot, Expressing, Control

Journal: International Journal of Biological Sciences

Article Title: NOX4-derived oxidative DNA damage impairs thyroid differentiation through an epigenetic mechanism in BRAF-mutated radioactive iodine refractory papillary thyroid cancer cells

doi: 10.7150/ijbs.123980

Figure Lengend Snippet: Knockdown of NOX4 or p22 phox as well as DNA repair proteins reduce the recruitment of DNMT1 to chromatin. A) Western-blot analysis of DNMT1 in chromatin fraction of thyrocytes and BRAF V600E -mutated thyroid cells (n=2). B) Western blot analysis of DNMT1 protein expression in chromatin fractions and whole-cell extracts 72 h after knocking down of NOX4 or p22 phox by RNA interference in BCPAP cells. C) Western blot analysis of DNMT1 protein expression in chromatin fractions and whole-cell extracts 72 h after knocking down of OGG1 by RNA interference in BCPAP cells. D) Western blot analysis of DNMT1 protein expression in chromatin fractions and whole-cell extracts 48 h after knocking down of MSH2 by RNA interference in BCPAP cells. Densitometry quantification of protein levels normalized to Lamin B or Vinculin levels and presented as chromatin enrichment or fold change compared with control cells. Values are mean ± SE. *p < 0.05, **p < 0.01, ***p < 0.001 and ****p<0.0001 (n = 3).

Article Snippet: For dabrafenib plus trametinib treatment, BCPAP cells were exposed to 100 nM dabrafenib (Selleck, #S2807) and 25 nM trametinib (Selleck, #S2673) for indicated time at 37 °C in DMEM with FCS, 8505C cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in RPMI with FCS and PDX cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in DMEM/F12 with FCS.

Techniques: Knockdown, Western Blot, Expressing, Control

Journal: International Journal of Biological Sciences

Article Title: NOX4-derived oxidative DNA damage impairs thyroid differentiation through an epigenetic mechanism in BRAF-mutated radioactive iodine refractory papillary thyroid cancer cells

doi: 10.7150/ijbs.123980

Figure Lengend Snippet: DNMT inhibition and knockdown of MSH2, MSH6, and OGG1 synergize to increase NIS mRNA expression. A) qRT-PCR analysis of NIS mRNA levels in BCPAP cells transfected with siRNA control or/and siRNA MSH2 or/and siRNA MSH6 or/and siRNA OGG1 and 24 h later treated for an additional 48 h in the presence or the absence of 1 µM DAC. B) qRT-PCR analysis of NIS mRNA levels in BCPAP cells transfected with siRNA control or siRNA NOX4 or siRNA p22 phox and 24 h later, treated for an additional 48 h in the presence or the absence of 1 µM DAC. Values are mean ± SE. *p < 0.05, **p < 0.01, and ***p < 0.001. C) Western blot analysis of PAX8 and NKX2.1 protein expressions in chromatin fraction and whole-cell extract 72 h after knocking down of NOX4 or p22 phox by RNA interference in BCPAP cells. Densitometry quantification of protein levels normalized to Lamin B or Vinculin levels and presented as chromatin enrichment or fold change compared with control cells. Values are mean ± SE. *p < 0.05 and **p < 0.01 (n = 5). D) ChIP-qPCR assays performed with BCPAP cells transfected with siRNA control and with BCPAP cells transfected with siRNA NOX4 immunoprecipitated with control IgG or anti-NKX2.1 antibody and analyzed by qPCR at TG promoter (two independent replicates).

Article Snippet: For dabrafenib plus trametinib treatment, BCPAP cells were exposed to 100 nM dabrafenib (Selleck, #S2807) and 25 nM trametinib (Selleck, #S2673) for indicated time at 37 °C in DMEM with FCS, 8505C cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in RPMI with FCS and PDX cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in DMEM/F12 with FCS.

Techniques: Inhibition, Knockdown, Expressing, Quantitative RT-PCR, Transfection, Control, Western Blot, ChIP-qPCR, Immunoprecipitation

Journal: International Journal of Biological Sciences

Article Title: NOX4-derived oxidative DNA damage impairs thyroid differentiation through an epigenetic mechanism in BRAF-mutated radioactive iodine refractory papillary thyroid cancer cells

doi: 10.7150/ijbs.123980

Figure Lengend Snippet: OGG1, MSH2, and MSH6 inhibit recruitment of PAX8 and NKX2.1 to chromatin and the MAPK pathway regulates MSH2 and MSH6 expressions. A) Western blot analysis of PAX8 and NKX2.1 protein expressions in chromatin fraction and whole-cell extract 72 h after knocking down of OGG1 (siRNA OGG1#1), MSH2, or/and MSH6 by RNA interference in BCPAP cells. Densitometry quantification of protein levels normalized to Lamin B or Vinculin levels and presented as chromatin enrichment and fold change compared with control cells. Values are mean ± SE. *p < 0.05, **p < 0.01, and ***p < 0.001 (n = 3). B) Immunoblot detection of MSH2 and MSH6 in PDX cells after treatment by the combination of dabrafenib (100 nM) plus trametinib (5 nM). Densitometric quantification of protein levels normalized to vinculin levels and presented as fold change compared with vehicle-treated cells. Student t-test is realized by comparing combination versus DMSO for each corresponding time of kinetic. Values are mean ± SE. *p < 0.05 and **p < 0.01 (n = 3).

Article Snippet: For dabrafenib plus trametinib treatment, BCPAP cells were exposed to 100 nM dabrafenib (Selleck, #S2807) and 25 nM trametinib (Selleck, #S2673) for indicated time at 37 °C in DMEM with FCS, 8505C cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in RPMI with FCS and PDX cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in DMEM/F12 with FCS.

Techniques: Western Blot, Control

Journal: International Journal of Biological Sciences

Article Title: NOX4-derived oxidative DNA damage impairs thyroid differentiation through an epigenetic mechanism in BRAF-mutated radioactive iodine refractory papillary thyroid cancer cells

doi: 10.7150/ijbs.123980

Figure Lengend Snippet: MAPK pathway inhibition and knockdown of NOX4 and p22 phox synergize to promote PAX8 and NKX2.1 recruitment to chromatin. A) Western-blot analysis of PAX8 and NKX2.1 protein expressions in chromatin fractions and whole-cell extracts of BCPAP cells transduced with siRNA control or siRNA NOX4 or siRNA p22 phox and treated with dabrafenib (100 nM) plus trametinib (25 nM) combination for 48 h. Densitometric quantification of protein levels normalized to Lamin B or loading control (red ponceau staining) and presented as chromatin enrichment and fold change compared with siRNA control-transduced cells. B) qRT-PCR analysis of NIS mRNA levels in BCPAP cells transfected with siRNA control or siRNA NOX4 or siRNA p22 phox and 24 h later, treated in the presence or the absence of dabrafenib plus trametinib combination for additional 48 h. C) qRT-PCR analysis of TSHR mRNA levels in BCPAP cells transfected with siRNA control or siRNA NOX4 or siRNA p22 phox and 24 h later, treated in the presence or the absence of dabrafenib plus trametinib combination for additional 48 h. Values are mean ± SE. *p < 0.05, **p < 0.01, and ***p < 0.001 (n = 3).

Article Snippet: For dabrafenib plus trametinib treatment, BCPAP cells were exposed to 100 nM dabrafenib (Selleck, #S2807) and 25 nM trametinib (Selleck, #S2673) for indicated time at 37 °C in DMEM with FCS, 8505C cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in RPMI with FCS and PDX cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in DMEM/F12 with FCS.

Techniques: Inhibition, Knockdown, Western Blot, Transduction, Control, Staining, Quantitative RT-PCR, Transfection

Journal: International Journal of Biological Sciences

Article Title: NOX4-derived oxidative DNA damage impairs thyroid differentiation through an epigenetic mechanism in BRAF-mutated radioactive iodine refractory papillary thyroid cancer cells

doi: 10.7150/ijbs.123980

Figure Lengend Snippet: Co-inhibition of SMAD and MAPK signalling promotes PAX8 and NKX2.1 recruitment to chromatin. A) BRAF-mutated thyroid cells were treated with TGF-beta receptor inhibitor (EW7197, 1 µM) for 4 h and analysed by Western-blot for expression of pSMAD3 and SMAD3. B) Western-blot analysis of PAX8 and NKX2.1 protein expressions in chromatin fractions and whole-cell extracts of BCPAP cells treated or not with dabrafenib (100 nM) plus trametinib (25 nM) combination in the presence or the absence of TGF-beta inhibitor (EW7197, 1 µM) for 48 h. Densitometric quantification of protein levels normalized to loading control and presented as chromatin enrichment or fold change compared with vehicle-treated cells. C and D) qRT-PCR analysis of NIS and TSHR mRNA levels in BCPAP cells treated or not with dabrafenib plus trametinib combination in the presence or the absence of TGF-beta inhibitor (EW7197) for 48 h. Densitometry quantification of protein levels normalized to Lamin B or Vinculin levels and presented as fold change compared with control cells. Values are mean ± SE. *p < 0.05, **p < 0.01, ***p < 0.001 and ****p<0.0001 (n = 3).

Article Snippet: For dabrafenib plus trametinib treatment, BCPAP cells were exposed to 100 nM dabrafenib (Selleck, #S2807) and 25 nM trametinib (Selleck, #S2673) for indicated time at 37 °C in DMEM with FCS, 8505C cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in RPMI with FCS and PDX cells were exposed to 100 nM dabrafenib and 5 nM trametinib to indicated time at 37 °C in DMEM/F12 with FCS.

Techniques: Inhibition, Western Blot, Expressing, Control, Quantitative RT-PCR