Journal: Journal of Biological Chemistry

Article Title: WOX1 Is Essential for Tumor Necrosis Factor-, UV Light-, Staurosporine-, and p53-mediated Cell Death, and Its Tyrosine 33-phosphorylated Form Binds and Stabilizes Serine 46-phosphorylated p53

doi: 10.1074/jbc.m505590200

Figure Lengend Snippet: FIGURE 1. p53 and WOX1 binding interactions. A, Molt-4 T cells were exposed to UV light (240 mJ/cm2), followed by culturing for 10–120 min. Both cytosolic and nuclear fractions were pre- pared and examined for phosphorylation of p53 at Ser46 and WOX1 at Tyr33 (p-WOX1) and their nuclear translocation. UV light also increased the levels of nuclear histone H3 and its acetylation at lysine 9 (H3k9). By immunoprecipitation (IP) using p53 IgG antibody, UV light was shown to induce binding of cytosolic p53 with WOX1 in Molt-4 T cells.B,weconfirmedtheUVlight-inducednuclear translocation of p53 and WOX1 in Molt-4 cells by immunofluorescence microscopy. Cells were stained with IgG antibodies against WWOX (N19; goat) and full-length p53 (FL-393; rabbit), respec- tively (3, 4). Secondary staining was performed using anti-goat IgG (conjugated with Texas Red) and anti-rabbit IgG (conjugated with Cy2). Nuclei were stained with 4,6-diamidino-2-phenylindole. C, monocytic U937 cells were exposed to UV light (240 mJ/cm2) and shown to have increased phos- phorylation of cytosolic p53 at Ser46 and WOX1 at Tyr33, and p53 binding with p-WOX1. D, similarly, neuroblastoma SK-N-SH cells were exposed to deferroxamine (500 M) for 1 h to induce hypoxic stress and shown to have an increased binding of p53 with WOX1.

Article Snippet: Additional specific antibodies used in Western blotting were against the following proteins: polyclonal IgG against WWOX (N-19), MDM2 (C-18), and p53 (FL-393) and monoclonal IgG against p53 (Pab240) from Santa Cruz Biotechnology; p53 and I B from BD Biosciences; phospho-p53 at Ser15 from Calbiochem; phospho-p53 at Ser46 from R&D Systems; -tubulin from Accurate Chemicals; and histones and their acetylated forms from Cell Signaling. cDNA Expression Constructs, Transfection and Expression in Cell Lines, and Stable Transfectants—The following expression constructs were made as previously described: 1) murine EGFP-WOX1 (3), 2) murine dominant negativeWOX1 (dn-WOX1) tagged with EGFP (25), 3) human wild type p53 tagged with DsRed (p53-pDsRedN1) (29), and 4) human p53-pDsRedN1 with Ser46 deletion (29).

Techniques: Binding Assay, Phospho-proteomics, Translocation Assay, Immunoprecipitation, Immunofluorescence, Microscopy, Staining

Journal: Journal of Biological Chemistry

Article Title: WOX1 Is Essential for Tumor Necrosis Factor-, UV Light-, Staurosporine-, and p53-mediated Cell Death, and Its Tyrosine 33-phosphorylated Form Binds and Stabilizes Serine 46-phosphorylated p53

doi: 10.1074/jbc.m505590200

Figure Lengend Snippet: FIGURE 3. Tyr33-phosphorylated WOX1 binds Ser46-phosphorylated p53 but not Ser46-deleted p53. p53-negative H1299 cells were transfected with DsRed-tagged wild type p53, p53S46, or DsRed alone by electroporation. The cells were cultured for 48 h and examined by fluorescence microscopy. More than 70% of cells expressed DsRed. UV light increased the binding of p-WOX1 with the wild type p53-DsRed, but not p53S46- DsRed, as determined by co-immunoprecipitation using antibodies against p-WOX1 (25). The ectopically expressed proteins are shown (see the bottom panel). IgH, IgG heavy chain.

Article Snippet: Additional specific antibodies used in Western blotting were against the following proteins: polyclonal IgG against WWOX (N-19), MDM2 (C-18), and p53 (FL-393) and monoclonal IgG against p53 (Pab240) from Santa Cruz Biotechnology; p53 and I B from BD Biosciences; phospho-p53 at Ser15 from Calbiochem; phospho-p53 at Ser46 from R&D Systems; -tubulin from Accurate Chemicals; and histones and their acetylated forms from Cell Signaling. cDNA Expression Constructs, Transfection and Expression in Cell Lines, and Stable Transfectants—The following expression constructs were made as previously described: 1) murine EGFP-WOX1 (3), 2) murine dominant negativeWOX1 (dn-WOX1) tagged with EGFP (25), 3) human wild type p53 tagged with DsRed (p53-pDsRedN1) (29), and 4) human p53-pDsRedN1 with Ser46 deletion (29).

Techniques: Transfection, Electroporation, Cell Culture, Fluorescence, Microscopy, Binding Assay, Immunoprecipitation

Journal: Journal of Biological Chemistry

Article Title: WOX1 Is Essential for Tumor Necrosis Factor-, UV Light-, Staurosporine-, and p53-mediated Cell Death, and Its Tyrosine 33-phosphorylated Form Binds and Stabilizes Serine 46-phosphorylated p53

doi: 10.1074/jbc.m505590200

Figure Lengend Snippet: FIGURE 2. Mapping of p53 and WOX1 interac- tions by yeast two-hybrid analysis and temper- ature-dependent WOX1 phosphorylation. A, analysis of protein/protein interaction in the cyto- plasm was performed using a Ras rescue-based yeast two-hybrid system (3, 10, 25, 29). In positive controls, binding of WOX1 with p53 and MafB self- interactionareshown,asevidencedbythegrowth of yeast at 37 °C using selective agarose plates containing galactose. In negative controls, no yeast growth at 37 °C was observed for the empty pSos/pMyr vectors and collagenase and lamin C. Human p53 physically interacted with the N-ter- minal WW domains of murine WOX1. Deletion of an N-terminal proline-rich segment (amino acids 66–100; see block No. 2) from the full-length p53 did not abrogate the binding. Similarly, deletion of Thr18 or Ser20 in p53 could not prevent its binding with WOX1. In contrast, deletion of Ser46 in p53 significantly reduced the binding. Alterations of Tyr33 to Arg in the first WW domain of WOX1 abol- ished its binding with p53. p53 structure was as follows: transcriptional activation domain (1); pro- line-rich region (2); DNA-binding domain (3); tet- ramerization domain (4). B, to examine WOX1 phos- phorylation at Tyr33, some yeast cells were grown at room temperature for 2 days in a galactose-contain- ing broth (to reach a preplateau stage), followed by culturing at 37 °C for 1 h to induce the activation of Ras pathway. Heat induced the expression of p53, WOX1, and its phosphorylation at Tyr33 (p-WOX1) in yeastcellstransfectedwithwildtypep53andWOX1. Incontrast,noWOX1phosphorylationwasobserved in cells transfected with p53S46 mutant and wild type WOX1.

Article Snippet: Additional specific antibodies used in Western blotting were against the following proteins: polyclonal IgG against WWOX (N-19), MDM2 (C-18), and p53 (FL-393) and monoclonal IgG against p53 (Pab240) from Santa Cruz Biotechnology; p53 and I B from BD Biosciences; phospho-p53 at Ser15 from Calbiochem; phospho-p53 at Ser46 from R&D Systems; -tubulin from Accurate Chemicals; and histones and their acetylated forms from Cell Signaling. cDNA Expression Constructs, Transfection and Expression in Cell Lines, and Stable Transfectants—The following expression constructs were made as previously described: 1) murine EGFP-WOX1 (3), 2) murine dominant negativeWOX1 (dn-WOX1) tagged with EGFP (25), 3) human wild type p53 tagged with DsRed (p53-pDsRedN1) (29), and 4) human p53-pDsRedN1 with Ser46 deletion (29).

Techniques: Phospho-proteomics, Binding Assay, Blocking Assay, Activation Assay, Expressing, Transfection, Mutagenesis

Journal: Journal of Biological Chemistry

Article Title: WOX1 Is Essential for Tumor Necrosis Factor-, UV Light-, Staurosporine-, and p53-mediated Cell Death, and Its Tyrosine 33-phosphorylated Form Binds and Stabilizes Serine 46-phosphorylated p53

doi: 10.1074/jbc.m505590200

Figure Lengend Snippet: FIGURE 10. A schematic model for p53 interactions with WOX1 and MDM2. A, UV light induces phosphorylation of p53 at Ser46 and WOX1 at Tyr33 and their complex formation in the presence of MDM2. Nutlin-3 inhibits MDM2 and appears to alter p53 conformation (p53*), thereby stabilizing p53 and its interaction with WOX1. This p53 is not phosphorylated at key serines. UV light restores the complex formation of p-p53-p- WOX1-MDM2. B, WOX1 alone binds MDM2 probably via its C-terminal short-chain alco- hol dehydrogenase/reductase domain, and nutlin-3 dissociates the binding. UV light restores the binding.

Article Snippet: Additional specific antibodies used in Western blotting were against the following proteins: polyclonal IgG against WWOX (N-19), MDM2 (C-18), and p53 (FL-393) and monoclonal IgG against p53 (Pab240) from Santa Cruz Biotechnology; p53 and I B from BD Biosciences; phospho-p53 at Ser15 from Calbiochem; phospho-p53 at Ser46 from R&D Systems; -tubulin from Accurate Chemicals; and histones and their acetylated forms from Cell Signaling. cDNA Expression Constructs, Transfection and Expression in Cell Lines, and Stable Transfectants—The following expression constructs were made as previously described: 1) murine EGFP-WOX1 (3), 2) murine dominant negativeWOX1 (dn-WOX1) tagged with EGFP (25), 3) human wild type p53 tagged with DsRed (p53-pDsRedN1) (29), and 4) human p53-pDsRedN1 with Ser46 deletion (29).

Techniques: Phospho-proteomics, Binding Assay

Journal: Pharmacognosy Magazine

Article Title: Bee Pollen and Doxorubicin by Synergistic Effects Inhibit the Proliferation of Breast Tumors in 4T1 Tumor-bearing BALB/c Mice: A Biochemical, Immunohistochemical,and Molecular Approach

doi: 10.1177/09731296231203809

Figure Lengend Snippet: Figure 7. The Mean Mice Tissue Genes Expression of Bax, Bcl-2, p53, and Caspase-3 in Experimental Groups.

Article Snippet: Notably, 5-μm sections were placed on slides and incubated with primary Ki-67 (1:1000; catalog number: AF7649), Bcl-2 (1:1000; catalog number: MAB8272), and p53 (1:1000; catalog number: GAF1355) antibodies (R&D Systems, Inc., USA) overnight at 95°C and then for 1 h at 25°C.

Techniques: Expressing

Journal: Pharmacognosy Magazine

Article Title: Bee Pollen and Doxorubicin by Synergistic Effects Inhibit the Proliferation of Breast Tumors in 4T1 Tumor-bearing BALB/c Mice: A Biochemical, Immunohistochemical,and Molecular Approach

doi: 10.1177/09731296231203809

Figure Lengend Snippet: Figure 8. The Mean Mice Tissue Proteins Expression of Bax, Bcl-2, p53, and Caspase-3 in Experimental Groups.

Article Snippet: Notably, 5-μm sections were placed on slides and incubated with primary Ki-67 (1:1000; catalog number: AF7649), Bcl-2 (1:1000; catalog number: MAB8272), and p53 (1:1000; catalog number: GAF1355) antibodies (R&D Systems, Inc., USA) overnight at 95°C and then for 1 h at 25°C.

Techniques: Expressing

Journal: Pharmacognosy Magazine

Article Title: Bee Pollen and Doxorubicin by Synergistic Effects Inhibit the Proliferation of Breast Tumors in 4T1 Tumor-bearing BALB/c Mice: A Biochemical, Immunohistochemical,and Molecular Approach

doi: 10.1177/09731296231203809

Figure Lengend Snippet: Figure 10. The Mean Mice Tissue Proteins Expression of Ki-67, Bcl-2, and p53 in Experimental Groups.

Article Snippet: Notably, 5-μm sections were placed on slides and incubated with primary Ki-67 (1:1000; catalog number: AF7649), Bcl-2 (1:1000; catalog number: MAB8272), and p53 (1:1000; catalog number: GAF1355) antibodies (R&D Systems, Inc., USA) overnight at 95°C and then for 1 h at 25°C.

Techniques: Expressing

Journal: Pharmacognosy Magazine

Article Title: Bee Pollen and Doxorubicin by Synergistic Effects Inhibit the Proliferation of Breast Tumors in 4T1 Tumor-bearing BALB/c Mice: A Biochemical, Immunohistochemical,and Molecular Approach

doi: 10.1177/09731296231203809

Figure Lengend Snippet: Figure 9. IHC Staining for Ki-67 (a1-e1), Bcl-2 (a2-e2), and p53 (a3-e3) in NC (a1-a2-a3), 4T1 (b1-b2-b3), DOX (c1-c2-c3), 100BP+DOX (d1-d2-d3), 200BP+DOX (e1-e2-e3), and 200BP (f1-f2-f3) Groups (Scale Bar = 30 μm, ×400).

Article Snippet: Notably, 5-μm sections were placed on slides and incubated with primary Ki-67 (1:1000; catalog number: AF7649), Bcl-2 (1:1000; catalog number: MAB8272), and p53 (1:1000; catalog number: GAF1355) antibodies (R&D Systems, Inc., USA) overnight at 95°C and then for 1 h at 25°C.

Techniques: Immunohistochemistry

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: ( A ) Targeting strategy. The wildtype (WT) Trp53 gene is within a 17-kb-long EcoRI (RI) fragment (black boxes are for coding sequences and white boxes for UTRs). The targeting construct contains: (1) a 1.5-kb-long 5’ homology region; (2) a Lox-Stop-Lox (LSL) cassette with a neomycin selection gene (Neo), four transcriptional stops (STOP) and an EcoRI site, flanked by LoxP sites (arrowheads); (3) p53 coding exons, including the Y217C (YC) missense mutation in exon 6 (asterisk) and an additional BanII site; (4) a 2.8-kb-long 3’ homology region; and (5) the diphteria α-toxin (DTA) gene for targeting enrichment. Proper recombinants with a Trp53 LSL-Y217C allele, resulting from the described crossing-overs, were G418 resistant. They were identified by a 2.4-kb-long band after PCR with primers a and b, and confirmed by bands of 635 and 224 bp after PCR with primers c and d and BanII digestion. They were also verified by Southern blot with the indicated probe as containing a 10.5 kb EcoRI band. Two recombinant ES clones were injected into blastocysts to generate chimeras, and germline transmission was verified by genotyping with primers c and d and BanII digestion. Excision of the LSL cassette was performed in vivo, by breeding Trp53 +/LSL-Y217C male mice with females carrying the PGK- Cre transgene, to obtain mice with a Trp53 Y217C allele. ( B–D ) Screening of recombinant ES clones (+) by PCR with primers a and b ( B ); PCR with primers c and d then BanII digestion ( C ); Southern blot ( D ). ( E ) Genotyping of mouse embryonic fibroblasts (MEFs) from an intercross of Trp53 +/Y217C mice, by PCR with primers c and d and BanII digestion. ( F ) Trp53 Y217C sequence around codon 217. The introduced Y217C missense mutation and the silent mutation creating an additional BanII restriction site are highlighted (asterisks). ( G ) WT and Trp53 Y217C/Y217C (YC/YC) MEFs express similar p53 mRNA levels. Total RNA was extracted, then p53 mRNAs were quantified by real-time qPCR, normalized to control mRNAs and the amount in WT cells was assigned the value of 1. Means + SEM (n=3) are shown. Primer sequences are listed in . Figure 1—source data 1. Labeled files for gels and blots in . Figure 1—source data 2. Raw and unedited gels and blots for .

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Construct, Selection, Mutagenesis, Southern Blot, Recombinant, Clone Assay, Injection, Transmission Assay, In Vivo, Sequencing, Control, Labeling

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: Portions of the DNA-binding domains from the mouse (residues 208–228) and human (residues 211–231) p53 proteins are shown, with identical residues in bold, and mouse Tyrosine 217 and human Tyrosine 220 in red.

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Binding Assay

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: ( A ) Increased p53 protein levels in Trp53 YC/YC and Trp53 +/YC mouse embryonic fibroblasts (MEFs). MEFs of the indicated genotypes were treated or not with 10 μM Nutlin 3a for 24 hr, then protein extracts were immunoblotted with antibodies against Mdm2, p53, p21, and actin. ( B ) The transactivation of classical p53 target genes Cdkn1a and Mdm2 is impaired in Trp53 YC/YC cells. Wildtype (WT), Trp53 YC/YC , and Trp53 -/- MEFs were treated as in ( A ), then (top) mRNAs were quantified in five to six independent experiments using real-time PCR, with results normalized to control mRNAs and mean RNA amounts in unstressed WT cells assigned a value of 1; or (bottom) ChIP assays were performed at the Cdkn1a and Mdm2 promoters in two to three independent experiments with an antibody against p53 or rabbit IgG as a negative control. Immunoprecipitates were quantified using real-time PCR, normalized to data over an irrelevant region, and the amount in unstressed WT cells was assigned a value of 1. Error bars: SEM. ( C ) Assessment of p53 WT and p53 Y217C subcellular localization by cellular fractionation. WT and Trp53 YC/YC MEFs were treated or not with 1 μΜ doxorubicin (Doxo) for 24 hr, submitted to cellular fractionation, then protein extracts were immunoblotted with antibodies against p53 or the fraction controls Tubulin for cytoplasm (Cp.), Nup98 for nucleoplasm (Np.), and histone H3 for chromatin (χin). ( D ) Assessment of p53 WT and p53 Y217C subcellular localization by immunofluorescence. WT, Trp53 YC/YC and Trp53 -/- MEFs were treated with 10 μM Nutlin 3a for 24 hr, then stained with antibodies against p53 (red) or actin (green) and DNA was counterstained with DAPI (blue). ( E ) Absence of a cell cycle arrest response in Trp53 YC/YC MEFs. Asynchronous cell populations of Trp53 +/+ , Trp53 YC/YC , and Trp53 -/- MEFs were analyzed 24 hr after 0, 3, or 12 Gy γ-irradiation. Means + SEM from three independent experiments. ( F ) Absence of a p53-dependent apoptotic response in Trp53 YC/YC thymocytes. Age-matched mice of the indicated genotypes were left untreated or submitted to 10 Gy whole-body γ-irradiation then sacrificed after 4 hr and their thymocytes were stained with Annexin V-FITC and analyzed by FACS. Means + SEM from two independent experiments. ( G ) Increased chromosomal instability in Trp53 YC/YC fibroblasts. Metaphase spreads were prepared from WT, Trp53 YC/YC , and Trp53 -/- MEFs at passage 4, then aberrant metaphases (with chromosome breaks, radial chromosomes, or double-minute chromosome [DMs]) were scored. Left: distribution of aberrant metaphases. Data from 110 WT, 97 Trp53 YC/YC , or 119 Trp53 -/- complete diploid metaphases, independently observed by two experimenters. Right: examples of two aberrant Trp53 YC/YC metaphases: one with a DM, a chromosome break (Br) and a radial chromosome (R), the other with multiple DMs. Enlargements of regions of interest are presented between the two metaphases. Scale bars ( D, G ): 5 μm. ***p<0.001, **p<0.01, *p<0.05, °p=0.09, ns: non-significant by Student’s t ( B, E, F ) or Fisher’s ( G ) tests. Figure 2—source data 1. Labeled files for gels and blots in . Figure 2—source data 2. Raw and unedited gels and blots for .

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Real-time Polymerase Chain Reaction, Control, Negative Control, Cell Fractionation, Immunofluorescence, Staining, Irradiation, Labeling

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: ( A ) Transactivation of the classical p53 target genes Cdkn1a (alias p21 ), Mdm2, and Pmaip1 (alias Noxa ) in response to Nutlin or Doxorubicin. WT, Trp53 +/YC , and Trp53 +/- mouse embryonic fibroblasts (MEFs) were treated or not with 10 μM Nutlin 3a (Nut) or 1 μM Doxorubicin (Doxo) for 24 hr, then mRNAs were quantified in ≥4 independent experiments using real-time PCR, with results normalized to control mRNAs and mean RNA amounts in unstressed WT cells assigned a value of 1. Means + SEM are shown. For each condition and gene, a dominant-negative effect (DNE) would lead to significant decrease in transactivation in Trp53 +/YC MEFs compared to both WT and Trp53 +/- MEFs, a result that was not observed. ( B ) Cell cycle arrest responses to γ-irradiation. Asynchronous cell populations of WT, Trp53 +/YC , and Trp53 +/- MEFs were analyzed 24 hr after 0, 3, or 12 Gy γ-irradiation. Means + SEM from three independent experiments. The comparison of cells submitted to identical irradiation doses revealed similar arrest responses in cells of all genotypes. ( C ) Apoptotic responses to γ-irradiation. WT, Trp53 +/YC , and Trp53 +/- MEFs age-matched mice were left untreated or submitted to 10 Gy whole-body γ-irradiation, then sacrificed after 4 hr and their thymocytes were stained with Annexin V-FITC and analyzed by FACS. Means + SEM from two independent experiments. The percentage of apoptotic cells was significantly higher in irradiated WT thymocytes compared to irradiated Trp53 +/YC or Trp53 +/- cells, whereas Trp53 +/YC and Trp53 +/- cells were not significantly different. **p<0.01, *p<0.05, ns: non-significant by Student’s t-test.

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Real-time Polymerase Chain Reaction, Control, Dominant Negative Mutation, Irradiation, Comparison, Staining

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: ( A ) Distribution of weaned mice obtained from Trp53 +/- or Trp53 +/YC intercrosses. Obs: observed numbers of mice at weaning (P21); exp: expected numbers assuming a Mendelian distribution without sex distortion; f/m: observed female/male ratios. Consistent with previous reports, the observed distribution of weaned mice from Trp53 +/- intercrosses did not conform to values expected for a Mendelian distribution without sex distortion (U=5; χ 2 =16.31>15.09), indicating a significant deficit in female Trp53 -/- mice (top). The distribution of weaned mice from Trp53 +/YC intercrosses diverged even more from values for a Mendelian distribution without sex distortion (U=5; χ 2 =104.23>15.09), due to a striking deficit in female Trp53 YC/YC mice (bottom). Differences between the frequencies of Trp53 YC/YC (4/677) and Trp53 -/- (8/196) females in the progeny, or between the female to male ratios for Trp53 YC/YC (4/75) and Trp53 -/- (8/28) animals, are statistically significant (p=0.0012 and p=0.0087 in Fisher’s tests, respectively). ( B ) Exencephaly is frequently observed in p53 YC/YC female embryos. Top: the distribution of E12.5–16.5 embryos from heterozygous ( Trp53 +/YC ) intercrosses or heterozygous-homozygous ( Trp53 +/YC × Trp53 YC/YC ) crosses is shown. f or m exenc.: number of female or male embryos with exencephaly; o.a.: embryos with other abnormalities. Below, examples of female Trp53 YC/YC embryos at E12.5, E13.5, and E16.5 exhibiting exencephaly (arrows) are each shown (center) together with a normal embryo from the same litter (bottom). Scale bars : 1 mm. ( C ) Distribution of mice at birth from the indicated crosses. Of note, out of five Trp53 YC/YC females observed at birth, only one remained alive at weaning age. Thus, the female/male ratio for weaned Trp53 YC/YC animals from these crosses was 1/22, a ratio similar to the one observed in A (4/75).

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques:

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: ( A–B ) In homozygous males, p53 Y217C leads to accelerated tumor-induced death ( A ), and aggressive metastatic tumors ( B ); n=cohort size. ( C ) Hematoxylin and eosin (H&E) staining of sections from the lung (top) and spleen (bottom) of Trp53 -/- and Trp53 YC/YC male mice, showing metastases in Trp53 YC/YC animals. Normal organ structures are shown, with ‘A’ indicating pulmonary alveoli, and ‘WP’ and ‘RP’ standing for splenic white and red pulp, respectively. In the lung section of the Trp53 YC/YC mouse, the rectangle indicates a lymphoma area. In the spleen section of the Trp53 YC/YC mouse, the typical splenic structures are absent due to massive tissue homogenization of the spleen by lymphoma cells.

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Staining, Tissue Homogenization

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: ( A ) Heat-map plot, with 717 differentially expressed genes suggestive of a loss of function (LOF), a separation of function (SOF), or a gain of function (GOF) for the p53 Y217C mutant, ranked according to log 2 fold change (n=number of genes). ( B ) Evidence of LOF in Trp53 YC/YC cells for genes encoding Puma, p21, and Zmat3. Data from three mice per genotype. Means + SEM are shown. ***p<0.001, **p<0.01, *p<0.05, °p=0.07, ns: non-significant by Student’s t-tests.

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Mutagenesis

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet: Effects of the Trp53 Y217C mutation: a summary. The comparison between Trp53 -/- and Trp53 Y217C/Y217C mice is presented. The phenotypes observed in Trp53 -/- male (M) and female (F) mice result from p53 loss of function (LOF), whereas those observed in Trp53 Y217C/Y217C mice result from p53 LOF as well as additional effects (gain of function [GOF] in bold). The + signs denote the presence of a phenotype. Xi: X chromosome inactivation.

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Mutagenesis, Comparison

Journal: eLife

Article Title: Oncogenic and teratogenic effects of Trp53 Y217C , an inflammation-prone mouse model of the human hotspot mutant TP53 Y220C

doi: 10.7554/eLife.102434

Figure Lengend Snippet:

Article Snippet: Cellular fractions were analyzed by western blots with antibodies against p53 (AF-1355, R&D Systems, 1/600), Tubulin (ab15568, Abcam, 1/1000), Nup98 (ab50610, Abcam, 1/1000), and histone H3 (ab1791, Abcam, 1/1000).

Techniques: Cell Culture, Sequencing, Recombinant, SYBR Green Assay, Staining, Software

Journal: Antioxidants

Article Title: Saposhnikovia divaricata Inhibits Inflammation, Oxidative Stress, and Ferroptosis to Alleviate DSS-Induced Ulcerative Colitis

doi: 10.3390/antiox15020258

Figure Lengend Snippet: Network pharmacology analysis identifies p53 as a core ferroptosis-related target of FF in UC. ( A ) Venn diagram illustrating the intersection of FF compound targets with ferroptosis- and UC-related targets. ( B ) Protein–protein interaction (PPI) network of the common targets. Node size and color intensity represent the degree of connectivity, with TP53 (p53) identified as the core target. ( C ) Compound-target-pathway network diagram. The inner pink nodes represent the 38 intersecting targets linking FF, UC, and ferroptosis. ( D ) Gene Ontology (GO) enrichment analysis of the common targets, categorized into Biological Process (BP, red), Cellular Component (CC, green), and Molecular Function (MF, blue). ( E ) Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis.

Article Snippet: The p53 antibody was obtained from Boster Biological Technology Co., Ltd. (Pleasanton, CA, USA, Item #BM0101).

Techniques:

Journal: Antioxidants

Article Title: Saposhnikovia divaricata Inhibits Inflammation, Oxidative Stress, and Ferroptosis to Alleviate DSS-Induced Ulcerative Colitis

doi: 10.3390/antiox15020258

Figure Lengend Snippet: FF modulates the expression of ferroptosis-related proteins in colon tissue via the p53 pathway. ( A ) Representative immunohistochemical (IHC) images of p53, SLC7A11, and GPX4 expression in colon sections (scale bar = 50 μm). ( B – D ) Quantitative analysis of the relative protein expression levels of p53 (B), SLC7A11 (C), and GPX4 (D). Data are presented as the mean ± SD ( n = 3 independent experiments). ### p < 0.001 versus the control (CON) group; * p < 0.05, ** p < 0.01, *** p < 0.001 versus the DSS model group.

Article Snippet: The p53 antibody was obtained from Boster Biological Technology Co., Ltd. (Pleasanton, CA, USA, Item #BM0101).

Techniques: Expressing, Immunohistochemical staining, Control

Journal: Aging cell

Article Title: Positive crosstalk between arginase-II and S6K1 in vascular endothelial inflammation and aging.

doi: 10.1111/acel.12001

Figure Lengend Snippet: Fig. 1 Silencing Arg-II in senescent cells inhibits eNOS uncoupling, reverses endothelial senescent phenotypic changes, and suppresses endothelial inflammation. Senescent human umbilical vein endothelial cells (HUVECs) were transduced with rAd ⁄ U6-LacZshRNA as control (con) or rAd ⁄ U6-Arg-IIshRNA to silence Arg-II gene. (A) Immunoblotting shows Arg-II silencing in senescent cells. (B) DHE staining for detection of O 2 and DAF-2DA staining for detection of NO. Quantifications of DHE and DAF-2DA signals are shown below. (C) SA-b-gal staining. Bar graphs show quantifications of SA-b-gal-positive cells. (D) Immunoblotting analysis of senescence markers p53-S15, p53, and p21Cip1

Article Snippet: Antibody against p21Cip1 (OP64) was purchased from Calbiochem (Genève, Switzerland); antibody against phosphor-p53-S15 (#9284s) was from Cell Signalling (Allschwil, Switzerland); Antibodies against S6K1 (#9205s) were from BD Transduction laboratories (Allschwil, Switzerland); antibodies against arginase-II (sc-20151) and p53 (sc-6243) were from SantaCruz (Nunningen, Switzerland); anti-SOD1 (TA302692) was from OriGene Technologies, Inc (Nunningen, Switzerland); Monoclonal antibody against HA-tag (12CA5) was obtained from Dr Brian A. Hemmings (Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland); Alexa Fluor680-conjugated anti-mouse IgG (A21057) and dihydroethidium (DHE) were from Molecular Probes ⁄ Invitrogen (Lucerne, Switzerland); IRDye800-conjugated anti-rabbit IgG (926-32211) were from LI-COR Biosciences (Bad Homburg, Germany); the membrane-permeable 4,5- diaminofluoresceine acetate (DAF-2DA) was from VWR international SA (Dietikon, Switzerland); X-gal was from Promega (Dübendorf, Switzerland); Endothelial cell growth supplement (ECGS) pack was from PromoCell GmbH (Allschwil, Switzerland) and all cell culture media and materials were purchased from Gibco BRL (Lucerne, Switzerland).

Techniques: Transduction, Control, Western Blot, Staining

Journal: Aging cell

Article Title: Positive crosstalk between arginase-II and S6K1 in vascular endothelial inflammation and aging.

doi: 10.1111/acel.12001

Figure Lengend Snippet: Fig. 2 Co-expression of superoxide dismutase-1 (SOD1) in young endothelial cells prevents Arg-II-induced eNOS-uncoupling, endothelial senescence and inflammation. Young endothelial cells were transduced with empty rAd ⁄ CMV vector as control (con) or rAd ⁄ CMV-Arg-II alone or rAd ⁄ CMV-Arg-II plus rAd ⁄ CMV-SOD1. (A) Immunoblotting analysis to confirm overexpression of Arg-II and SOD1. (B) DHE staining for detection of O 2 and DAF-2DA staining for detection of NO and effect of SOD1. Bar graphs show quantifications of DHE and DAF-2DA signals. (C) SA-b-gal staining and effect of SOD1. Bar graphs show quantifications of percentage of SA-b-gal positive cells. (D) Immunoblotting analysis of senescence markers p53-S15, p53, and p21Cip1 levels, and endothelial inflammation markers vascular adhesion molecule-1 (VCAM1) and intercellular adhesion molecule-1 (ICAM1) expression. Tubulin served as loading control. Bar graphs show quantifications of the markers. (E) CFDA-SE fluorescence labeled THP-1 monocyte adhesion to endothelial cells that were transduced with rAd expressing transgenes as indicated. Bar graphs show quantifications of the adhered monocytes. *P < 0.05, **P < 0.01 and ***P < 0.005 vs. control (con); ††<0.01 and †††P < 0.005 vs. Arg-II. Scale bar = 0.2 mm.

Article Snippet: Antibody against p21Cip1 (OP64) was purchased from Calbiochem (Genève, Switzerland); antibody against phosphor-p53-S15 (#9284s) was from Cell Signalling (Allschwil, Switzerland); Antibodies against S6K1 (#9205s) were from BD Transduction laboratories (Allschwil, Switzerland); antibodies against arginase-II (sc-20151) and p53 (sc-6243) were from SantaCruz (Nunningen, Switzerland); anti-SOD1 (TA302692) was from OriGene Technologies, Inc (Nunningen, Switzerland); Monoclonal antibody against HA-tag (12CA5) was obtained from Dr Brian A. Hemmings (Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland); Alexa Fluor680-conjugated anti-mouse IgG (A21057) and dihydroethidium (DHE) were from Molecular Probes ⁄ Invitrogen (Lucerne, Switzerland); IRDye800-conjugated anti-rabbit IgG (926-32211) were from LI-COR Biosciences (Bad Homburg, Germany); the membrane-permeable 4,5- diaminofluoresceine acetate (DAF-2DA) was from VWR international SA (Dietikon, Switzerland); X-gal was from Promega (Dübendorf, Switzerland); Endothelial cell growth supplement (ECGS) pack was from PromoCell GmbH (Allschwil, Switzerland) and all cell culture media and materials were purchased from Gibco BRL (Lucerne, Switzerland).

Techniques: Expressing, Transduction, Plasmid Preparation, Control, Western Blot, Over Expression, Staining, Labeling

Journal: Aging cell

Article Title: Positive crosstalk between arginase-II and S6K1 in vascular endothelial inflammation and aging.

doi: 10.1111/acel.12001

Figure Lengend Snippet: Fig. 5 Silencing Arg-II prevents S6K1-induced eNOS-uncoupling, senescence and inflammation in young endothelial cells. The transduction procedure of young cells was the same as in Fig. 5A. (A) DHE staining for detection of O 2 and DAF-2DA staining for detection of NO and effect of Arg-II silencing. Bar graphs show quantifications of DHE and DAF-2DA signals. (B) SA-b-gal staining and effect of Arg-II silencing. Bar graphs show quantifications of percentage of SA-b-gal positive cells. (C) Immunoblotting analysis of senescence markers p53-S15, p53, and p21Cip1 levels, and endothelial inflammation markers vascular adhesion molecule-1 (VCAM1) and intercellular adhesion molecule-1 (ICAM1). Tubulin served as loading control. Bar graphs show quantifications of the markers. (D) CFDA-SE fluorescence labeled THP-1 monocyte adhesion to endothelial cells that were transduced with rAd expressing transgenes and shRNA as indicated. Bar graphs show quantifications of the adhered monocytes. **P < 0.01, ***P < 0.005 vs. control (con ⁄ LacZ); †P < 0.05, ††P < 0.01, †††P < 0.005 vs. S6K1ca ⁄ LacZ group. Scale bar = 0.2 mm.

Article Snippet: Antibody against p21Cip1 (OP64) was purchased from Calbiochem (Genève, Switzerland); antibody against phosphor-p53-S15 (#9284s) was from Cell Signalling (Allschwil, Switzerland); Antibodies against S6K1 (#9205s) were from BD Transduction laboratories (Allschwil, Switzerland); antibodies against arginase-II (sc-20151) and p53 (sc-6243) were from SantaCruz (Nunningen, Switzerland); anti-SOD1 (TA302692) was from OriGene Technologies, Inc (Nunningen, Switzerland); Monoclonal antibody against HA-tag (12CA5) was obtained from Dr Brian A. Hemmings (Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland); Alexa Fluor680-conjugated anti-mouse IgG (A21057) and dihydroethidium (DHE) were from Molecular Probes ⁄ Invitrogen (Lucerne, Switzerland); IRDye800-conjugated anti-rabbit IgG (926-32211) were from LI-COR Biosciences (Bad Homburg, Germany); the membrane-permeable 4,5- diaminofluoresceine acetate (DAF-2DA) was from VWR international SA (Dietikon, Switzerland); X-gal was from Promega (Dübendorf, Switzerland); Endothelial cell growth supplement (ECGS) pack was from PromoCell GmbH (Allschwil, Switzerland) and all cell culture media and materials were purchased from Gibco BRL (Lucerne, Switzerland).

Techniques: Transduction, Staining, Western Blot, Control, Labeling, Expressing, shRNA

Journal: Aging cell

Article Title: Positive crosstalk between arginase-II and S6K1 in vascular endothelial inflammation and aging.

doi: 10.1111/acel.12001

Figure Lengend Snippet: Fig. 6 Deficiency in Arg-II gene in mice (Arg-II) ⁄ )) protects against vascular inflammation and aging. Aortas of young (2–3 months) and old (23–24 months) wild-type (WT) and Arg-II) ⁄ ) mice were cleaned of perivascular tissues and subjected to en face staining or Immunoblotting analysis. (A) qRT-PCR analysis of Arg-II mRNA levels. (B) Confocal microscopic en face detection of endothelial vascular adhesion molecule-1 (VCAM1) and intercellular adhesion molecule-1 (ICAM1), vWF (the endothelial marker), followed by counterstaining with DAPI. Shown are representative images of each group. (C) Immunoblotting analyses of VCAM1, ICAM1, p21 levels in the aortas and p53-Ser15 and p53 levels in the heart of young and old WT and Arg-II) ⁄ ) mice. (D and E) Quantifications of the above results. Tubulin is taken as loading control. n = 4 mice in each group. **P < 0.01, ***P < 0.001 vs. young WT mice; †P < 0.05, ††P < 0.01, †††P < 0.001 vs. old WT mice. Scale bar = 100 lm.

Article Snippet: Antibody against p21Cip1 (OP64) was purchased from Calbiochem (Genève, Switzerland); antibody against phosphor-p53-S15 (#9284s) was from Cell Signalling (Allschwil, Switzerland); Antibodies against S6K1 (#9205s) were from BD Transduction laboratories (Allschwil, Switzerland); antibodies against arginase-II (sc-20151) and p53 (sc-6243) were from SantaCruz (Nunningen, Switzerland); anti-SOD1 (TA302692) was from OriGene Technologies, Inc (Nunningen, Switzerland); Monoclonal antibody against HA-tag (12CA5) was obtained from Dr Brian A. Hemmings (Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland); Alexa Fluor680-conjugated anti-mouse IgG (A21057) and dihydroethidium (DHE) were from Molecular Probes ⁄ Invitrogen (Lucerne, Switzerland); IRDye800-conjugated anti-rabbit IgG (926-32211) were from LI-COR Biosciences (Bad Homburg, Germany); the membrane-permeable 4,5- diaminofluoresceine acetate (DAF-2DA) was from VWR international SA (Dietikon, Switzerland); X-gal was from Promega (Dübendorf, Switzerland); Endothelial cell growth supplement (ECGS) pack was from PromoCell GmbH (Allschwil, Switzerland) and all cell culture media and materials were purchased from Gibco BRL (Lucerne, Switzerland).

Techniques: Staining, Western Blot, Quantitative RT-PCR, Marker, Control

Journal: Journal of Cancer

Article Title: Mutant Pattern of p53 as a Feasible Predictor of Distant Metastasis Following Curative Gastrectomy for Advanced-stage Gastric Cancer

doi: 10.7150/jca.98563

Figure Lengend Snippet: Clinical characteristics of the patients with p53 staining patterns.

Article Snippet: IHC was performed using primary antibody for p53 (clone DO-7, cat. no. ZM0408, 1:200 dilution; Zhongshan GoldenBridge Biotechnology, Beijing, China) and BOND-III autostainer (Leica Biosystems Nussloch GmbH, Nussloch, Germany).

Techniques: Staining, Mutagenesis

Journal: Journal of Cancer

Article Title: Mutant Pattern of p53 as a Feasible Predictor of Distant Metastasis Following Curative Gastrectomy for Advanced-stage Gastric Cancer

doi: 10.7150/jca.98563

Figure Lengend Snippet: Recurrence patterns involving both p53 mutant and wild-type patterns.

Article Snippet: IHC was performed using primary antibody for p53 (clone DO-7, cat. no. ZM0408, 1:200 dilution; Zhongshan GoldenBridge Biotechnology, Beijing, China) and BOND-III autostainer (Leica Biosystems Nussloch GmbH, Nussloch, Germany).

Techniques: Mutagenesis

Journal: Journal of Cancer

Article Title: Mutant Pattern of p53 as a Feasible Predictor of Distant Metastasis Following Curative Gastrectomy for Advanced-stage Gastric Cancer

doi: 10.7150/jca.98563

Figure Lengend Snippet: Overall survival and recurrence-free survival of patients with both the p53 wild-type and mutant patterns. Kaplan-Meier curves for (A) overall survival and (B) recurrence-free survival over a period of 5 years with the p53 wild-type and p53 mutant pattern. Patients with the p53 mutant pattern had low (A) overall survival and (B) recurrence-free survival rates in all patients. In subgroup analysis, the recurrence-free survival rate was lower in patients with the p53 mutant pattern than in those with the wild-type pattern as regards both (C) pN0 or (D) pN+, and (E) early and (F) advanced-stage gastric cancer.

Article Snippet: IHC was performed using primary antibody for p53 (clone DO-7, cat. no. ZM0408, 1:200 dilution; Zhongshan GoldenBridge Biotechnology, Beijing, China) and BOND-III autostainer (Leica Biosystems Nussloch GmbH, Nussloch, Germany).

Techniques: Mutagenesis

Journal: Journal of Cancer

Article Title: Mutant Pattern of p53 as a Feasible Predictor of Distant Metastasis Following Curative Gastrectomy for Advanced-stage Gastric Cancer

doi: 10.7150/jca.98563

Figure Lengend Snippet: Comparison of the characteristics of patients with early- and advanced-stage gastric cancer in association with the p53 wild-type and p53 mutant pattern.

Article Snippet: IHC was performed using primary antibody for p53 (clone DO-7, cat. no. ZM0408, 1:200 dilution; Zhongshan GoldenBridge Biotechnology, Beijing, China) and BOND-III autostainer (Leica Biosystems Nussloch GmbH, Nussloch, Germany).

Techniques: Comparison, Mutagenesis

Journal: Journal of Cancer

Article Title: Mutant Pattern of p53 as a Feasible Predictor of Distant Metastasis Following Curative Gastrectomy for Advanced-stage Gastric Cancer

doi: 10.7150/jca.98563

Figure Lengend Snippet: Clinical characteristics of the patients with p53 staining patterns before and after matching on the propensity score.

Article Snippet: IHC was performed using primary antibody for p53 (clone DO-7, cat. no. ZM0408, 1:200 dilution; Zhongshan GoldenBridge Biotechnology, Beijing, China) and BOND-III autostainer (Leica Biosystems Nussloch GmbH, Nussloch, Germany).

Techniques: Staining, Mutagenesis

Journal: Journal of Cancer

Article Title: Mutant Pattern of p53 as a Feasible Predictor of Distant Metastasis Following Curative Gastrectomy for Advanced-stage Gastric Cancer

doi: 10.7150/jca.98563

Figure Lengend Snippet: Comparison of patient characteristics between pN0 and pN+ gastric cancer in p53 wild-type and mutant pattern.

Article Snippet: IHC was performed using primary antibody for p53 (clone DO-7, cat. no. ZM0408, 1:200 dilution; Zhongshan GoldenBridge Biotechnology, Beijing, China) and BOND-III autostainer (Leica Biosystems Nussloch GmbH, Nussloch, Germany).

Techniques: Comparison, Mutagenesis