Journal: Journal of Alzheimer's Disease Reports

Article Title: Utility of DNA Methylation as a Biomarker in Aging and Alzheimer’s Disease

doi: 10.3233/ADR-220109

Figure Lengend Snippet: Summary of DNA methylation clocks

Article Snippet: Cho Model 2 , First , 5 , 20-74 , Pyrosequencing , Bisulphite Conversion (EZ DNA Methylation - Lightning ™ Kit; Zymo) , Blood , 100 , Multivariate linear model , Association with chronological age , [ ] .

Techniques: DNA Methylation Assay, Cell Culture, Marker, Modification, Sequencing, Methylation, Methylation Sequencing, Biomarker Assay

Journal: Nature Communications

Article Title: PD-L2 controls peripherally induced regulatory T cells by maintaining metabolic activity and Foxp3 stability

doi: 10.1038/s41467-022-32899-5

Figure Lengend Snippet: A Naive CD3 + CD4 + CD44 − CD62L + Foxp3 − naive T cells were isolated from the spleens of WT Foxp3 GFP and cultured for 72 h in the presence of CD3/CD28 beads, IL-2 and TGF-β. Culture plates were coated with 5 µg/mL PD-L2Fc or control IgG1Fc for 30 min prior culture. B Representative flow cytometry plots of Foxp3 induction in CD3 + CD4 + CD24 + Foxp3 GFP+ iTregs after 72 h of culture. C Absolute numbers of iTregs after 72 h of culture, presented as mean ± SEM. n = 3 biologically independent samples. D Foxp3 mean fluorescence intensity (MFI) of iTregs after 72 h of culture, presented as mean ± SEM. n = 3 biologically independent samples. E IL-10 secretion by iTregs after 72 h of culture, presented as the mean ± SEM. n = 8 biologically independent samples. F Following culture, cells were transferred to PDL-coated HS mini plates and a Mito Stress test was performed to measure oxygen levels in the culture medium. Oxygen consumption rate (OCR) in response to Oligomycin (oligo.), FCCP and Rotenone (Rot/AA) sequential injections. n = 3 biologically independent samples. G Basal respiration in PD-L2Fc or control IgG1Fc groups. H Spare respiratory capacity in PD-L2Fc or control IgG1Fc groups. I ATP production in PD-L2Fc or control IgG1Fc groups. J Schematic of the Foxp3 promoter region, showing the intron 1 TSDR region containing CpG#19, CpG#20, CpG#21, and CpG#22 within the CNS2. K Average methylation of CpG#19, CpG#20, CpG#21, and CpG#22 in TSDR region. L Methylation of CpG#19, CpG#20, CpG#21, and CpG#22 in TSDR region. n = 4 biologically independent samples. Data are representative of 2 independent experiments and are presented as means ± SEM. Source data are provided as a Source Data file. A two-tailed Student’s t test for unpaired data was applied for comparisons between two groups.

Article Snippet: For the methylation analysis, Foxp3 DNA methylation was performed by bisulfite pyrosequencing by EpigenDX as described previously .

Techniques: Isolation, Cell Culture, Control, Flow Cytometry, Fluorescence, Methylation, Two Tailed Test

Journal: Nature Communications

Article Title: PD-L2 controls peripherally induced regulatory T cells by maintaining metabolic activity and Foxp3 stability

doi: 10.1038/s41467-022-32899-5

Figure Lengend Snippet: A Thymus of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice were collected and analyzed by flow cytometry. Representative plots of CD25 + (CD25 + TregP cells) and Foxp3 lo Treg cell progenitors (Foxp3 lo TregP cells) analyzed based on CD25 and Foxp3 GFP expression. B Corresponding quantitation presented as mean ± SEM. n = 3 biologically independent mice. C Spleens of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice were collected and analyzed by flow cytometry. Representative plots of CD3 + CD4 + CD25 + Foxp3 GFP+ total Tregs. D Numbers of total Tregs in WT and PD-L2 KO mice presented as mean ± SEM. n = 5 biologically independent mice. E BALB/c (WT) BMDC were differentiated in vitro for 7–10 days, plated and further cultured with or without 50 ng/mL IL-4 for 24 h to measure PD-L2 expression by flow cytometry. F Representative plots of CD11c + BMDC, expression of PD-L2. G Numbers of PD-L2-expressing CD11c + BMDC presented as mean ± SEM. n = 4 biologically independent samples. H PD-L2 low and PD-L2 high BMDCs were intravenously injected or not to WT or PD-L2 KO Foxp3 GFP mice on day 0, and on day 3 the spleens of recipient mice were analyzed for CD3 + CD4 + CD25 + Foxp3 + total Tregs by flow cytometry. I Numbers of CD3 + CD4 + CD25 + Foxp3 GFP+ total Tregs per spleen at day 3 following BMDC transfer. n = 3 biologically independent mice. J – M PD-L2 high or PD-L2 null BMDCs were i.v. injected or not to WT or PD-L2 KO Foxp3 GFP mice on day 0, and on day 3 the spleens of recipient mice were analyzed for Tregs by flow cytometry. J Numbers of CD3 + CD4 + CD25 + Foxp3 GFP+ total Tregs. K Numbers of CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − pTregs. L Numbers of CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 + tTregs. M Thymus of recipient mice were collected and analyzed by flow cytometry, and the frequencies of CD25 + TregP cells and Foxp3 lo TregP cells was analyzed based on CD25 and Foxp3 GFP expression, presented as mean ± SEM. n = 3 biologically independent mice. Data are representative of three independent experiments and are presented as means ± SEM. Source data are provided as a Source Data file. A two-tailed Student’s t test for unpaired data was applied for comparisons between two groups, except for multi-group comparisons where Tukey’s multiple comparison one-way ANOVA tests were used. Mouse image provided with permission from Servier Medical Art.

Article Snippet: For the methylation analysis, Foxp3 DNA methylation was performed by bisulfite pyrosequencing by EpigenDX as described previously .

Techniques: Flow Cytometry, Expressing, Quantitation Assay, In Vitro, Cell Culture, Injection, Two Tailed Test, Comparison

Journal: Nature Communications

Article Title: PD-L2 controls peripherally induced regulatory T cells by maintaining metabolic activity and Foxp3 stability

doi: 10.1038/s41467-022-32899-5

Figure Lengend Snippet: A Spleens of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice were collected and analyzed by flow cytometry. Representative plots of CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − pTregs and CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 + tTregs. B Quantitation of pTreg and tTreg numbers in the spleen presented as means ± SEM. n = 5 biologically independent mice. C – D pTregs and tTregs—gated as in ( A )—were FACS-sorted from the spleens of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice and cultured for 24 h with CD3/CD28 beads, IL-2 and TGF-β. IL-10 was measured by ELISA in the culture supernatants. C Levels of IL-10 in pTreg cultures. n = 3 biologically independent samples. D Levels of IL-10 in tTreg cultures. E CD3 + CD4 + CD44 − CD62L + naive T cells were isolated from the spleens of BALB/c mice and co-cultured with FACS-sorted CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − splenic pTregs isolated from Foxp3 GFP or PD-L2 KO Foxp3 GFP mice for 72 h. Cell proliferation was assessed by measuring thymidine incorporation. F 3 H thymidine incorporation after 72 h of culture. n = 4 biologically independent samples. G CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − splenic pTregs cells were FACS-sorted from the spleens of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice and incubated for 24 h with CD3/CD28 beads, IL-2 and TGF-β. Genomic DNA was extracted, followed by bisulfite conversion, purification, cloning, and the degree of methylation of CpG#19, CpG#20, CpG#21, and CpG#22 within the TSDR region was determined by bisulfite sequencing. H Foxp3 GFP expression within WT and PD-L2 KO pTregs. n = 3 biologically independent samples. I Average methylation of CpG#19, CpG#20, CpG#21, and CpG#22 in TSDR region. n = 3 biologically independent samples. J Methylation of CpG#19, CpG#20, CpG#21, and CpG#22 in TSDR region. K 10 6 WT Foxp3 GFP iTregs were adoptively transferred to WT BALB/c or PD-L2 KO hosts on day 0 and on day 3, the frequencies of GFP + Tregs were analyzed in the spleen of recipients. L Representative plots of CD3 + CD4 + CD25 + Foxp3 GFP+ Tregs. M Numbers of transferred Tregs in the spleen presented as mean ± SEM. n = 3 biologically independent mice. Data are representative of two independent experiments and are presented as means ± SEM. Source data are provided as a Source Data file. A two-tailed Student’s t test for unpaired data was applied for comparisons between two groups, except for multi-group comparisons where Tukey’s multiple comparison one-way ANOVA tests were used. Mouse image provided with permission from Servier Medical Art.

Article Snippet: For the methylation analysis, Foxp3 DNA methylation was performed by bisulfite pyrosequencing by EpigenDX as described previously .

Techniques: Flow Cytometry, Quantitation Assay, Cell Culture, Enzyme-linked Immunosorbent Assay, Isolation, Incubation, Purification, Cloning, Methylation, Methylation Sequencing, Expressing, Two Tailed Test, Comparison

Journal: Nature Communications

Article Title: PD-L2 controls peripherally induced regulatory T cells by maintaining metabolic activity and Foxp3 stability

doi: 10.1038/s41467-022-32899-5

Figure Lengend Snippet: A CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − splenic pTregs cells were FACS-sorted from the spleens of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice and incubated for 24 h with CD3/CD28 beads, IL-2 and TGF-β. Cells were then lysed and mRNA was isolated to perform RNA-sequencing (RNA-seq). Volcano plot representation of differentially regulated genes in WT and PD-L2 KO pTregs. Dotted lines represent 2FC ( x axis) and p < 0.05 ( y axis) cutoffs. B – G Differentially regulated genes in selected pathways. B Treg function pathway. C Fatty acid (FA) degradation pathway. D Amino acid (AA) degradation pathway. E TCA cycle pathway. F Glycolysis pathway. G Pentose Phosphate Pathway (PPP) pathway. All red dots represent genes whose differences are p < 0.05. H – K CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − splenic pTreg cells were FACS-sorted from the spleens of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice and incubated for 24 h with CD3/CD28 beads, IL-2 and TGF-β. Following culture, cells were transferred to PDL-coated HS mini plates and a Mito Stress test was performed to measure oxygen levels in the culture medium. H Oxygen consumption rate (OCR) in response to Oligomycin (oligo.), FCCP, and Rotenone (Rot/AA) sequential injections. I Basal respiration in WT and PD-L2 KO pTregs. n = 3 biologically independent samples. J Spare respiratory capacity in WT and PD-L2 KO pTregs. K Respiration-coupled ATP production. L Representative flow cytometry plots of MitoTracker DR expression within WT and PD-L2 KO pTregs after 24 h of culture. M Quantitation of MitoTracker DR expression within WT and PD-L2 KO pTregs after 24 h of culture, presented as mean ± SEM. n = 3 biologically independent samples. N CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − splenic pTregs cells were FACS-sorted from the spleens of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice and incubated for 24 h with CD3/CD28 beads, IL-2 and TGF-β with or without 2 mM methyl pyruvate. O Levels of IL-10 production in the culture supernatants. n = 3 biologically independent samples. H – O Data are representative of two independent experiments and are presented as means ± SEM. Source data are provided as a Source Data file. A two-tailed Student’s t test for unpaired data was applied for comparisons between two groups, except for multi-group comparisons where Tukey’s multiple comparison one-way ANOVA tests were used.

Article Snippet: For the methylation analysis, Foxp3 DNA methylation was performed by bisulfite pyrosequencing by EpigenDX as described previously .

Techniques: Incubation, Isolation, RNA Sequencing, Flow Cytometry, Expressing, Quantitation Assay, Two Tailed Test, Comparison

Journal: Nature Communications

Article Title: PD-L2 controls peripherally induced regulatory T cells by maintaining metabolic activity and Foxp3 stability

doi: 10.1038/s41467-022-32899-5

Figure Lengend Snippet: A Foxp3 GFP and PD-L2 KO Foxp3 GFP mice were i.n. challenged on days −10, −9 and −8 with 100 µg ovalbumin (OVA). On day 0, mice were intraperitoneally sensitized with 50 µg OVA emulsified in alum (1:1) and CD3 + CD4 + CD25 + Foxp3 GFP+ Nrp1 − pTreg numbers were analyzed by flow cytometry on day 7. B Representative plots of pTregs in the lungs of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice. C Numbers of pTregs in the lungs of Foxp3 GFP and PD-L2 KO Foxp3 GFP mice presented as mean ± SEM. n = 4 biologically independent mice. D Representative plots of PD-1 expression in lung pTregs from Foxp3 GFP and PD-L2 KO Foxp3 GFP . E Representative plots of Foxp3 expression in lung pTregs from Foxp3 GFP and PD-L2 KO Foxp3 GFP mice and corresponding quantitation presented as mean ± SEM. n = 3 biologically independent mice. F BALB/c (WT) and PD-L2 KO BMDC were differentiated in vitro for 7–10 days and cultured with FACS-sorted CD4 + CD44 − CD62L + KJ1-26 + naive T cells in the presence of IL-2, TGF-β, 100ng/mL OVA peptide and CD3/CD28 stimulation to induce Treg differentiation for 72 h at 1:20 ratio. G Representative plot of Foxp3 expression. H Foxp3 expression in T cells incubated with either WT or PD-L2 KO BMDC, presented as mean ± SEM. n = 3 biologically independent mice. I Levels of IL-10 in the supernatants, presented as mean ± SEM. n = 4 biologically independent samples. J Representative plots of BODIPY 493/503 expression in T cells incubated with either WT or PD-L2 KO BMDC and corresponding quantitation presented as mean ± SEM. n = 3 biologically independent samples. K Foxp3 GFP and PD-L2 KO Foxp3 GFP mice were challenged as in A . On days 7, 8, and 9 mice were further challenged or not with 100 mg/kg ethyl pyruvate intraperitoneally. L Lung resistance in response to 40 mg/mL of methacholine. M Numbers of CD11b + Ly6G + neutrophils (PMN), CD11c − SiglecF + eosinophils (eos.), CD11c + SiglecF + CD64 + macrophages (mac.) and CD3 + T cells in the BAL fluid. n = 3 biologically independent mice. Data are representative of two independent experiments, presented as means ± SEM. Source data are provided as a Source Data file. A two-tailed Student’s t test for unpaired data was applied for comparisons between two groups, except for multi-group comparisons where Tukey’s multiple comparison one-way ANOVA tests were used. Mouse image provided with permission from Servier Medical Art.

Article Snippet: For the methylation analysis, Foxp3 DNA methylation was performed by bisulfite pyrosequencing by EpigenDX as described previously .

Techniques: Flow Cytometry, Expressing, Quantitation Assay, In Vitro, Cell Culture, Incubation, Two Tailed Test, Comparison

Journal: Cell stem cell

Article Title: Lentiviral Gene Therapy in HSCs Restores Lineage-Specific Foxp3 Expression and Suppresses Autoimmunity in a Mouse Model of IPEX Syndrome.

doi: 10.1016/j.stem.2018.12.003

Figure Lengend Snippet: Figure 1. The FoxP3 Reporter LV Shows Expression Selective for the Treg Cell Lineage (A) Endogenous human FOXP3 gene shows location of regulatory regions (promoter, CNS1, CNS2, CNS3, and 30 UTR) included in vector. Vector maps show design of CNS123p-mStrawberry and CNS123p-FoxP3-mStrawberry constructs within the pCCL vector backbone. (B) Analysis of human hematopoietic cell lines transduced with CNS123p-mStrawberry. Histograms show endogenous FoxP3 status of each cell line (left) and mStrawberry expression (right) in each cell line transduced with CNS123p-mStrawberry. Plots show mStrawberry expression in human hematopoietic cell lines over a range of vector copy numbers (n = 12 per cell line). (C) Activated human CD4 cells transduced with different doses of CNS123p-mStrawberry. Histograms show mStrawberry expression in viable CD4+ cells analyzed 4 days after activation. (see also Figure S2B). (D) Experimental design to evaluate in vivo lineage-specific expression of CNS123p-mStrawberry. Lin HSPCs were isolated from CD45.2 FoxP3-prom-GFP mice and transduced with CNS123p-mStrawberry. Transduced lin HSPCs were transplanted into lethally irradiated congenic CD45.1 recipients. CD45.2 donor cells within each hematopoietic lineage were analyzed at 20 weeks post-transplant for mStrawberry reporter LV expression (see also Figure S2A). (E) Histograms depict mStrawberry reporter expression in each hematopoietic lineage in bone marrow, thymus, and spleen of engrafted mice. Each individual histogram line represents mStrawberry expression for an individual mouse (n = 9 mice; see also Figure S2C). (F) y axis represents the percentage of mStrawberry+ cells within each hematopoietic lineage in the BM, spleen, and thymus (n = 9 mice). Data in (E) represent mean ± SD.

Article Snippet: CpG dinucleotide methylation analysis of CNS2 of the human FoxP3 gene was performed by EpigenDx and determined by bisulfite treatment of RNase-treated genomic DNA, followed by PCR amplification and pyrosequencing (EpigenDx assay ADS783-FS2).

Techniques: Expressing, Plasmid Preparation, Construct, Transduction, Activation Assay, In Vivo, Isolation, Irradiation

Journal: Cell stem cell

Article Title: Lentiviral Gene Therapy in HSCs Restores Lineage-Specific Foxp3 Expression and Suppresses Autoimmunity in a Mouse Model of IPEX Syndrome.

doi: 10.1016/j.stem.2018.12.003

Figure Lengend Snippet: Figure 2. Lineage-Specific FoxP3 Expression Restores Treg Cell Development from Scurfy (FoxP3 Mutant) HSCs (A) Transplant setup to evaluate Treg cell development. Scurfy (FoxP3mut) mice were rescued with WT CD45.1 splenocytes at birth to allow survival into adulthood to serve as bone marrow donors. Lin HSPCs were isolated from rescued scurfy (FoxP3mut) or wild-type (FoxP3-prom-GFP) donor mice and transduced with CNS123p-mStrawberry or CNS123p-FoxP3-mStrawberry. Transduced lin HSPCs were transplanted into lethally irradiated WT CD45.1 congenic recipients. After 12 weeks, donor cells from each transplant cohort were evaluated for thymic and splenic reconstitution of Treg cells. Treg cell populations from each group were identified as CD4+mStrawberry+ cells (uncorrected scurfy Treg cells [Sf-Treg cells]; corrected scurfy Treg cells [cSf-Treg cells]) or CD4+GFP+ cells (wild- type Treg cells [WT-Treg cells]). (B) Lineage distribution of total donor thymocytes in mice reconstituted with Sf, cSf, or WT BM lin cells (n = 3–5 mice/arm). (C) Thymic Treg cell reconstitution. FACS plots show donor CD45.2+CD4SP cells in the thymus of transplant recipients. Gates delineate thymic Sf-Treg cells, cSf-Treg cells, and WT-Treg cells. Bottom panel shows expression of the Treg cell surface markers CD25, GITR, and CTLA4 within each putative Treg cell population (surface marker expression for Sf-Treg cells and cSf-Treg cells is shown for mStrawberryhigh cells or cells expressing the top 50% of mStrawberry expression). Histograms depict one representative experiment of 3 (see also Figure S2D). (D) FACS sort for splenic Treg and Tconv cells. Splenic Treg cell populations (mStrawberryhigh or GFP+ gates) were FACS sorted for a Treg cell suppression assay. Tconv cell populations (mStrawberry or GFP gates) were sorted for an iTreg cell induction assay. (E) In vitro Treg cell suppression assay. Sorted Treg cells (shown in D) were co-cultured with responder T cells (Tresp cells) (congenic WT CD4+ cells labeled with a fluorescent proliferation dye) at a 1:1 ratio in the presence of bead-bound CD3 and CD28 antibodies. Histograms depict Tresp cell proliferation in one of three representative experiments. Bar graph shows proliferation index for each Treg cell culture condition (n = 6–9 Tresp cell cultures per arm from 3 different Treg cell sources per arm; data normalized to internal ‘‘no Treg cell’’ control for each experiment). (F) Sorted splenic Tconv cells (shown in D) were activated with CD3 and CD28 antibodies in the presence of 20 ng/mL interleukin-2 (IL-2) and 20 ng/mL TGF-b for 4 days to induce iTreg cells. FACS plots show mStrawberry or GFP expression from each group (n = 3 mice/group). Data in (B), (C), (E), and (F) are presented as mean ± SD. Data in (B) were analyzed by Kruskal-Wallis test for each lineage. Data in (E) are analyzed by Kruskal- Wallis test for overall comparison for all groups and Mann-Whitney U test for pairwise comparisons. *p < 0.05; **p < 0.01; ***p < 0.001; NS, not significant.

Article Snippet: CpG dinucleotide methylation analysis of CNS2 of the human FoxP3 gene was performed by EpigenDx and determined by bisulfite treatment of RNase-treated genomic DNA, followed by PCR amplification and pyrosequencing (EpigenDx assay ADS783-FS2).

Techniques: Expressing, Mutagenesis, Isolation, Transduction, Irradiation, Marker, Suppression Assay, In Vitro, Cell Culture, Labeling, Control, Comparison, MANN-WHITNEY

Journal: Cell stem cell

Article Title: Lentiviral Gene Therapy in HSCs Restores Lineage-Specific Foxp3 Expression and Suppresses Autoimmunity in a Mouse Model of IPEX Syndrome.

doi: 10.1016/j.stem.2018.12.003

Figure Lengend Snippet: Figure 3. The Lineage-Specific FoxP3 cDNA Vector Generates Functional Treg Cells Capable of Rescuing the Scurfy Mouse (A) Assay for in vivo Treg cell function: three groups of CD4 cells containing putative Treg cells were generated by congenic bone marrow transplants: uncorrected scurfy CD4 (Sf-CD4; no. 1); corrected scurfy CD4 (cSf-CD4; no. 2); and wild-type CD4 (WT-CD4; no. 3). To obtain Sf-CD4 and cSf-CD4, CD45.2 Lin HSPCs were isolated from scurfy donors (rescued at birth by CD45.1 splenocytes) and transduced with either CNS123p-mStrawberry (Sf-CD4; no. 1) or CNS123p-FoxP3- mStrawberry (cSf-CD4; no. 2). To obtain WT-CD4, CD45.2 Lin HSPCs were isolated from FoxP3-prom-GFP donors and transduced with CNS123p- mStrawberry (no. 3). Transduced cells were transplanted into lethally irradiated congenic (CD45.1) recipients. 8 weeks post-transplant, donor CD45.2+CD4+ cells were purified with magnetic beads from the spleens of transplant recipients and injected intraperitoneally into scurfy neonates. Scurfy neonates and age-matched WT receiving PBS injection were also analyzed as control conditions no. 4 and no. 5. The autoimmune phenotype of all groups was evaluated at 21 days of life (see also Figure S3). (B) Photographs of scurfy mice or WT controls at 21 days. White arrows highlight ear skin phenotype in mice from each group. Ear skin inflammation (char- acterized by small, thickened, scaly ears) is seen in untreated scurfy mice (Sf + PBS) and scurfy mice receiving uncorrected scurfy CD4 cells (‘‘Sf + Sf-CD4’’). Normal ear skin without inflammation is seen in WT controls (‘‘WT + PBS’’) and scurfy mice receiving wild-type or corrected scurfy CD4 cells (‘‘Sf + WT-CD4’’ and ‘‘Sf + cSf-CD4’’). (C) Spleen-to-body-weight ratio for rescued scurfy mice or WT littermate controls. (D) Activated (CD44+CD62L) CD4 T cells (expressed as a percentage of total CD4 splenocytes) in the spleens of rescued scurfy mice or WT littermate controls. (E) Serum cytokine levels in rescued scurfy mice or WT littermate controls. Data in (C)–(E) are presented as mean ± SD. Data on (C)–(E) represent n = 3 independent experiments pooled for analysis with a total of 3–6 mice/arm. Data in (C)–(E) were analyzed by Kruskal-Wallis test for overall comparison for all groups, and Mann-Whitney U test was performed for pairwise comparisons. *p < 0.05; **p < 0.01.

Article Snippet: CpG dinucleotide methylation analysis of CNS2 of the human FoxP3 gene was performed by EpigenDx and determined by bisulfite treatment of RNase-treated genomic DNA, followed by PCR amplification and pyrosequencing (EpigenDx assay ADS783-FS2).

Techniques: Plasmid Preparation, Functional Assay, In Vivo, Cell Function Assay, Generated, Isolation, Transduction, Irradiation, Magnetic Beads, Injection, Control, Comparison, MANN-WHITNEY

Journal: Cell stem cell

Article Title: Lentiviral Gene Therapy in HSCs Restores Lineage-Specific Foxp3 Expression and Suppresses Autoimmunity in a Mouse Model of IPEX Syndrome.

doi: 10.1016/j.stem.2018.12.003

Figure Lengend Snippet: Figure 4. The FoxP3 Reporter Vector CNS123p-mStrawberry Shows Treg Cell Lineage-Selective Expression in a Humanized Mouse Model (A) Experimental setup for humanized mouse models. Cord blood CD34+ HSPCs were transduced with CNS123p-mStrawberry and transplanted into neonatal NSG mice (B, C, E, and F) or NSG-SGM3 mice (D). 12–16 weeks post-transplant, engrafted hCD45+ cells were analyzed for mStrawberry expression. (B) mStrawberry reporter expression in each hematopoietic lineage. Each overlaid histogram represents mStrawberry expression in an individual mouse (n = 10–14 mice humanized with 2 different cord blood CD34+ donors; see also Figures S4A–S4C). (C) Percentage of mStrawberry+ cells in each lineage shown in (B). (D) Co-expression of FoxP3 and mStrawberry in humanized mice. Splenic human CD4+ cells were FACS sorted into mStrawberry+ and mStrawberry pop- ulations followed by intracellular staining for FoxP3 expression. Left panel shows sorting of human CD4+ cells by mStrawberry expression, and right panel shows FoxP3 expression in sorted populations. Results are representative of 2 independent experiments. (E) CNS2 methylation analysis of T cell populations from humanized mice. Figure shows the locations of CNS2 within the endogenous FOXP3 gene and CNS2 within the viral genome. Red arrows indicate differential primer binding sites for amplification of endogenous or viral CNS2. FACS plot shows sorting gates used to define Treg cell (CD4+CD25+) and Tconv cell (CD4+CD25) populations in CD4-enriched cells isolated from the pooled spleens of 3–5 humanized mice. Heatmap represents the percentage of methylated reads detected at each of the 9 CpG sites within endogenous and viral CNS2. Results are representative of 2 independent experiments using pooled NSG cohorts humanized from 2 different CB CD34+ donors (see also Figures S4D–S4F). (F) Experimental setup for NSG competitive repopulation assay. ‘‘Test’’ CB CD34+ cells were transduced with either CNS123p-mStrawberry or CNS123p-FoxP3- mStrawberry, and ‘‘competitor’’ CD34+ cells were transduced with a UBC-mCitrine vector. Test and competitor cells were co-transplanted at a 1:1 ratio into NSG neonates, and the percentage of competitor (mCitrine+) CD45+ cells engrafted in the BM at 12 weeks was determined for each group (n = 6 mice per group; humanized from 2 different CB CD34+ donors). Data in (F) represent mean ± SD. Data in (F) were analyzed by Mann-Whitney U test.

Article Snippet: CpG dinucleotide methylation analysis of CNS2 of the human FoxP3 gene was performed by EpigenDx and determined by bisulfite treatment of RNase-treated genomic DNA, followed by PCR amplification and pyrosequencing (EpigenDx assay ADS783-FS2).

Techniques: Plasmid Preparation, Expressing, Transduction, Staining, Methylation, Binding Assay, Isolation, MANN-WHITNEY

Journal: Redox Biology

Article Title: Folic acid modulates VPO1 DNA methylation levels and alleviates oxidative stress-induced apoptosis in vivo and in vitro

doi: 10.1016/j.redox.2018.08.005

Figure Lengend Snippet: Folic acid modulates the vascular peroxidase 1 (VPO1) promoter methylation levels of the CpG sites and the expression in HUVCEs. HUVCE were treated with 0–500 nmol/L folic acid for 48 h and exposed to 120 μg/mL ox-LDL for the first 24 h. (A) Schematic diagram of mice VPO1 promoter (1897–2233 bp). Pyrosequencing assay data were evaluated by dividing the VPO1 promoters into 26 CpG sites. The locations of CpG sites were indicated with red font numbers. (B) Mean methylation levels of CpG sites in VPO1 in HUVCEs. (n = 3) *, p < 0.05 was considered the significance of any differences between test groups. (C) Gene expression levels of VPO1 (×10 3 ) in HUVECs. (D) Representative western blot bands of VPO1 and β-actin proteins. (E) Semiquantitative levels of VPO1 proteins calculated by band density analysis normalized to β-actin expression. The plotted values are mean ± SE values for 3 independent experiments. a, p < 0.05 compared with the ox-LDL + FA20. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article).

Article Snippet: Subsequently, the membranes were blocked with 5% (w/v) milk in Tris-buffered saline and 0.1% Tween 20 for 2 h at room temperature, followed by incubation with rabbit polyclonal anti-VPO1 (1:500; Merck Millipore Corporation), mouse anti-DNMT1 (1:500; Abcam, Cambridge, UK), rabbit polyclonal anti-DNMT3a (1:1000; Abcam), rabbit polyclonal anti-DNMT3b (1:500; Abcam), and rabbit polyclonal anti-β-actin antibodies (1:1000; Cell Signaling Technology, Danvers, MA, USA) overnight at 4 °C on a rocking table and washing with PBST.

Techniques: Methylation, Expressing, Pyrosequencing Assay, Gene Expression, Western Blot

Journal: Redox Biology

Article Title: Folic acid modulates VPO1 DNA methylation levels and alleviates oxidative stress-induced apoptosis in vivo and in vitro

doi: 10.1016/j.redox.2018.08.005

Figure Lengend Snippet: Responses of DNA methyltransferase (DNMT) activity and expression in HUVCEs. HUVCE were treated with 0–1000 nmol/L folic acid for 48 h and exposed to 120 μg/mL ox-LDL for the first 24 h. (A) The total DNMTs activity in HUVECs. (B) Global methylation levels in HUVECs. The plotted values are mean ± SE values for 3 independent experiments. a, p < 0.05 compared with the ox-LDL + FA20. (C) Gene expression levels of DNMT1 (×10 5 ), DNMT3A (×10 3 ), and DNMT3B (×10 5 ) in HUVECs. (D) Representative western blot bands of DNMT1, DNMT3A, DNMT3B and β-actin proteins. (E) Semiquantitative levels of DNMT1, DNMT3A, DNMT3B proteins calculated by band density analysis normalized to β-actin expression. The plotted values are mean ± SE values for 3 independent experiments. a, p < 0.05 compared with the ox-LDL + FA20. b, p < 0.05 compared with the ox-LDL + FA0.

Article Snippet: Subsequently, the membranes were blocked with 5% (w/v) milk in Tris-buffered saline and 0.1% Tween 20 for 2 h at room temperature, followed by incubation with rabbit polyclonal anti-VPO1 (1:500; Merck Millipore Corporation), mouse anti-DNMT1 (1:500; Abcam, Cambridge, UK), rabbit polyclonal anti-DNMT3a (1:1000; Abcam), rabbit polyclonal anti-DNMT3b (1:500; Abcam), and rabbit polyclonal anti-β-actin antibodies (1:1000; Cell Signaling Technology, Danvers, MA, USA) overnight at 4 °C on a rocking table and washing with PBST.

Techniques: Activity Assay, Expressing, Methylation, Gene Expression, Western Blot

Journal: Cancer Medicine

Article Title: Molecular Characterization and Clinical Relevance of MGMT ‐Silenced Pancreatic Cancer

doi: 10.1002/cam4.70393

Figure Lengend Snippet: Patients' and tumor characteristics according to MGMT methylation status in the public cohorts.

Article Snippet: MGMT promoter methylation status was assessed by pyrosequencing (via the MGMT plus Diatech Pharmacogenetics [Jesi, Italy] kit), as previously described [ ].

Techniques: Methylation

Journal: Cancer Medicine

Article Title: Molecular Characterization and Clinical Relevance of MGMT ‐Silenced Pancreatic Cancer

doi: 10.1002/cam4.70393

Figure Lengend Snippet: Transcriptomic features of MGMT ‐silenced PAC. (a) Volcano plot of differentially expressed genes in MGMT ‐methylated versus not‐methylated PAC. The vertical dotted lines identify genes with absolute log2FoldChange > 0.58 (i.e., absolute fold change > 1). The horizontal dotted line identifies genes with adjusted p < 0.01. Each point represents a gene, and genes are colored based on up (red) and downregulation (yellow) in MGMT ‐methylated versus not‐methylated groups. (b) Bar plot reporting results of GSEA performed on up‐ and downregulated genes in MGMT ‐methylated versus not‐methylated PAC. The color of the barplot reports the significance of the p value of the hypergeometric tests (after Benjamini–Hochberg multiple test correction). Only pathways with adjusted p < 0.1 are reported. Most pathways show a negative enrichment score, representing a negative enrichment in MGMT ‐methylated tumors. (c) Boxplots comparing ESTIMATE deconvolution scores between MGMT ‐methylated versus not‐methylated PAC. Wilcoxon mean rank‐sum p values are shown. (d) Overlay of PAC cases according to MGMT ‐methylation status (inner ring) with published PAC transcriptomic subtypes (outer rings), according to Moffitt, Collisson, and Bailey classifications. ADEX , Aberrantly Differentiated Endocrine Exocrine; GSEA , Gene Set Enrichment Analysis; MGMT , O 6 ‐methylguanine‐ DNA methyltransferase; PAC , pancreatic cancer.

Article Snippet: MGMT promoter methylation status was assessed by pyrosequencing (via the MGMT plus Diatech Pharmacogenetics [Jesi, Italy] kit), as previously described [ ].

Techniques: Methylation

Journal: Cancer Medicine

Article Title: Molecular Characterization and Clinical Relevance of MGMT ‐Silenced Pancreatic Cancer

doi: 10.1002/cam4.70393

Figure Lengend Snippet: Genomic features of PAC cases according to MGMT methylation status. (a) Oncoprint summarizing somatic SNVs/indels according to MGMT methylation status. The top 20 most frequently mutated genes are presented. Upper bars represent TMB levels. MGMT ‐methylated tumors are shown on the far right. (b) Bar plot reporting results of enrichment analysis of SNVs/indels according to MGMT methylation status. On the x axis, enrichment score is reported as the z‐score scaled‐, natural logarithm‐transformed odds ratio of the comparison between MGMT ‐methylated versus not‐methylated cases. Bars are colored according to the enrichment score and adjusted (after Benjamini–Hochberg multiple test correction) p value as orange (significantly enriched in not‐methylated, enrichment score ≤ 0 and adjusted p ≤ 0.05), yellow (enriched in not‐methylated, enrichment score < 0 and adjusted p value > 0.05), light red (enriched in methylated, enrichment score > 0 and adjusted p > 0.05), and dark red (significantly enriched in methylated, enrichment score > 0 and adjusted p ≤ 0.05). (c, d) Barplots reporting results of oncogenic signaling pathways analysis according to MGMT methylation status. Fraction of each affected pathway (c) and fraction of samples affected (d). The NRF2 pathway is not plotted as it was not affected in any cases. The * identifies the only significant different, as evaluated by Fisher's exact test. Del, Deletion—Ins, Insertion; MGMT , O 6 ‐methylguanine‐ DNA methyltransferase; NRF2 , Nuclear Respiratory Factor 2; TMB , tumor mutational burden.

Article Snippet: MGMT promoter methylation status was assessed by pyrosequencing (via the MGMT plus Diatech Pharmacogenetics [Jesi, Italy] kit), as previously described [ ].

Techniques: Methylation, Transformation Assay, Comparison, Protein-Protein interactions

Journal: Cancer Medicine

Article Title: Molecular Characterization and Clinical Relevance of MGMT ‐Silenced Pancreatic Cancer

doi: 10.1002/cam4.70393

Figure Lengend Snippet: Prognostic impact of MGMT ‐silencing in the public cohorts and in the INT validation cohort. (a) Overall survival represented through Kaplan–Meier curves according to MGMT methylation status in the pooled training cohort. Survival data are missing for one case among non‐methylated patients. (b) Forest plot of multivariable Cox regression analysis for overall survival adjusting for patients' age, sex, tumor histology, and tumor stage at diagnosis. (c) Overall survival represented through Kaplan–Meier curves according to MGMT methylation status in the INT cohort. (d) Forest plot of multivariable Cox regression analysis for overall survival adjusting for patients' age, sex, ECOG PS, and tumor stage at diagnosis. The hazard ratios are shown with 95% confidence intervals, and Wald p values are reported on the far right. Patient with MGMT ‐methylated tumors show better overall survival after adjustment for other covariates. BR , Borderline Resectable; ECOG PS , Eastern Cooperative Oncology Group Performance Status; LAD , Locally Advanced Disease; MGMT , O 6 ‐methylguanine‐ DNA methyltransferase.

Article Snippet: MGMT promoter methylation status was assessed by pyrosequencing (via the MGMT plus Diatech Pharmacogenetics [Jesi, Italy] kit), as previously described [ ].

Techniques: Biomarker Discovery, Methylation

Journal: Cancer Medicine

Article Title: Molecular Characterization and Clinical Relevance of MGMT ‐Silenced Pancreatic Cancer

doi: 10.1002/cam4.70393

Figure Lengend Snippet: Patients' and tumor characteristics according to MGMT status in the INT cohort.

Article Snippet: MGMT promoter methylation status was assessed by pyrosequencing (via the MGMT plus Diatech Pharmacogenetics [Jesi, Italy] kit), as previously described [ ].

Techniques: Biomarker Discovery, Methylation, Expressing

Journal: Cell Communication and Signaling : CCS

Article Title: Reprogramming the epigenetic profile improves the B regulatory cell function of patients with recurrent pregnancy loss

doi: 10.1186/s12964-026-02669-7

Figure Lengend Snippet: Epigenetic dysregulation of the IL10 promoter in regulatory B cells (Bregs) from recurrent pregnancy loss (RPL) patients. Bregs (CD19⁺CD5⁺CD1d⁺) were isolated from peripheral blood of healthy controls (HC, n = 30) and RPL patients ( n = 30). A – D Flow cytometry gating strategy: ( A ) Live cell selection (DAPI⁻), ( B ) doublet exclusion (FSC-A vs. FSC-H), ( C ) CD19⁺ B cell isolation, and ( D ) CD5⁺CD1d⁺ Breg identification. E Peripheral Breg frequency. F – G Global histone modifications in Bregs by ELISA: ( F ) H3K4me3 (transcriptional activation mark) and ( G ) H3K27me3 (transcriptional repression mark). H LPS-induced IL-10 secretion (ELISA). I IL10 promoter methylation quantified by methylation-specific PCR (MSP). J H3K4me3 enrichment at the IL10 promoter (ChIP-ELISA). K - L IL10 expression: ( K ) mRNA (RT-qPCR) and ( L ) secreted protein (ELISA). M Inverse correlation between IL10 promoter methylation and transcriptional activity. The data in bars are mean ± SD. Dots in bars represent biological replicates. Statistics: Mann–Whitney test for two groups, ANOVA + Tukey post hoc test for panel H. Abbreviations: Bregs, regulatory B cells; RPL, recurrent pregnancy loss; HC, healthy control; MSP, methylation-specific PCR; ChIP-ELISA, chromatin immunoprecipitation coupled with ELISA

Article Snippet: E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing).

Techniques: Isolation, Flow Cytometry, Selection, Cell Isolation, Enzyme-linked Immunosorbent Assay, Activation Assay, Methylation, Expressing, Quantitative RT-PCR, Activity Assay, MANN-WHITNEY, Control, Chromatin Immunoprecipitation

Journal: Cell Communication and Signaling : CCS

Article Title: Reprogramming the epigenetic profile improves the B regulatory cell function of patients with recurrent pregnancy loss

doi: 10.1186/s12964-026-02669-7

Figure Lengend Snippet: IL10 promoter methylation inversely correlates with Breg immunosuppressive capacity. A Gating strategy for proliferating effector T cells (Teffs) by flow cytometry (CFSE-low population). B Proliferating Teff counts in co-cultures with Bregs from healthy controls (HC) or recurrent pregnancy loss (RPL) patients. Data: mean ± SD; *** p < 0.0001 (one-way ANOVA with Tukey’s post hoc test). C – D Correlation between IL10 promoter methylation (quantified by methylation-specific PCR, MSP) and Teff suppression in ( C ) HC ( n = 30) and ( D ) RPL ( n = 30) cohorts. Dots represent individual samples; dashed lines indicate linear regression. Statistics: Pearson’s correlation coefficient (two-tailed). Abbreviations: Bregs, regulatory B cells; Teff, effector T cell; MSP, methylation-specific PCR; HC, healthy control; RPL, recurrent pregnancy loss

Article Snippet: E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing).

Techniques: Methylation, Flow Cytometry, Two Tailed Test, Control

Journal: Cell Communication and Signaling : CCS

Article Title: Reprogramming the epigenetic profile improves the B regulatory cell function of patients with recurrent pregnancy loss

doi: 10.1186/s12964-026-02669-7

Figure Lengend Snippet: DNMT1 regulates IL10 promoter methylation in regulatory B cells (Bregs). A Quantification of DNMT1 occupancy at the IL10 promoter in Bregs from healthy controls (HC, n = 30) and recurrent pregnancy loss (RPL) patients ( n = 30) by chromatin immunoprecipitation coupled with ELISA (ChIP-ELISA). B - C Correlation analysis between DNMT1 levels and IL10 promoter methylation in HC (B) and RPL ( C ) Bregs. Key: ( A ) DNMT1 levels (mean ± SD) normalized to input DNA. B - C Scatter plots with linear regression lines (Pearson r and p -values indicated). Statistics: Mann–Whitney U test (A); Pearson correlation ( B , C ). P values: *** p < 0.0001. Each dot represents an individual sample. Abbreviations: Bregs, Regulatory B cells; HC, Healthy control; IL10, Interleukin-10; RPL, Recurrent pregnancy loss. IgG: Isotype IgG used as a negative control Ab in ChIP

Article Snippet: E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing).

Techniques: Methylation, Chromatin Immunoprecipitation, Enzyme-linked Immunosorbent Assay, MANN-WHITNEY, Control, Negative Control

Journal: Cell Communication and Signaling : CCS

Article Title: Reprogramming the epigenetic profile improves the B regulatory cell function of patients with recurrent pregnancy loss

doi: 10.1186/s12964-026-02669-7

Figure Lengend Snippet: DNMT1-mediated suppression of IL-10 expression in B cells. A c-Maf occupancy at the IL10 promoter region measured by ChIP-ELISA. B Correlation analysis between c-Maf and IL10 transcription in regulatory B cells (Bregs). C – F Pan B cells were transfected with DNMT1 or mutant (mu) DNMT1 plasmids, stimulated with CD40L (1 µg/ml; C-D) or LPS (1 µg/ml; E–F) for 24 h, and analyzed for ( C , E ) IL10 mRNA levels (RT-qPCR) and ( D , F ) IL-10 protein in culture supernatants (ELISA). Data are mean ± SD ( n = 3 biological replicates); each dot represents an individual sample. Statistical significance was determined by Student’s t-test (A), Pearson’s r (B), and one-way ANOVA with Tukey’s post-hoc test (C–F). p-values: p < 0.05 ( * ), p < 0.01 (**), p < 0.001 (***), p < 0.0001 (****)

Article Snippet: E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing).

Techniques: Expressing, Enzyme-linked Immunosorbent Assay, Transfection, Mutagenesis, Quantitative RT-PCR

Journal: Cell Communication and Signaling : CCS

Article Title: Reprogramming the epigenetic profile improves the B regulatory cell function of patients with recurrent pregnancy loss

doi: 10.1186/s12964-026-02669-7

Figure Lengend Snippet: DNMT1 ubiquitination status and TRIM28-Pol II correlations at the IL10 promoter in Bregs. A – C Ubiquitination levels of DNMT1 at the IL10 promoter in Bregs. ( D ) TRIM28 occupancy at the IL10 promoter in Bregs. E – F Correlation between TRIM28 occupancy and DNMT1 levels. G – H Correlation between DNMT1 occupancy and RNA polymerase II (Pol II) recruitment. I – L B cells transfected with plasmids encoding wild-type (DNMT1p, TRIM28p) or mutant (DNMT1mup, TRIM28mup) proteins. I Quantification of His-DNMT1 by ELISA. J – L Ubiquitination ( J ), K48-linked polyubiquitin chains (K), and proteasomal recruitment ( L ) in His-antibody-precipitated complexes (cross-ELISA). Data are mean ± SD; individual data points represent biological replicates. Statistics: One-way ANOVA with Tukey’s post hoc test ( A – D , I – L ); Pearson’s correlation coefficient ( E – H ). Significance: ** p < 0.01; *** p < 0.001; **** p < 0.0001. Plasmid notation: “p” denotes wild-type plasmid; “mup” denotes catalytically inactive mutant (e.g., DNMT1mup: C1246Y mutation)

Article Snippet: E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing).

Techniques: Ubiquitin Proteomics, Transfection, Mutagenesis, Enzyme-linked Immunosorbent Assay, Plasmid Preparation

Journal: Cell Communication and Signaling : CCS

Article Title: Reprogramming the epigenetic profile improves the B regulatory cell function of patients with recurrent pregnancy loss

doi: 10.1186/s12964-026-02669-7

Figure Lengend Snippet: SAHA restores the immunosuppressive capacity of RPL Bregs. A Global TRIM28 protein levels in Bregs. B – C Correlation between TRIM28 expression and the immunosuppressive function of Bregs. D SAHA treatment induces TRIM28 upregulation in RPL Bregs. I – M Levels of indicated molecules at the IL10 promoter region in RPL Bregs. N Teff proliferation rate. O Quantification of proliferating Teff cells. P Effects of TRIM28 knockdown (kd) via RNA interference (RNAi). Q - S Bars show the levels of indicated cytokines in culture supernatant. Individual data points represent independent samples; bar graphs show mean ± SD. Statistical analysis: Mann–Whitney U test (A); Pearson correlation coefficient (B–C); one-way ANOVA with Tukey’s post hoc test (I–M, O, P). Significance: * p < 0.05; ** p < 0.01; *** p < 0.001; **** p < 0.0001. Abbreviations: IgG, isotype control antibody for ChIP experiments; kd, TRIM28 knockdown; cRNAi, control RNAi (scrambled sequence)

Article Snippet: E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing).

Techniques: Expressing, Knockdown, MANN-WHITNEY, Control, Sequencing

Journal: Cell Communication and Signaling : CCS

Article Title: Reprogramming the epigenetic profile improves the B regulatory cell function of patients with recurrent pregnancy loss

doi: 10.1186/s12964-026-02669-7

Figure Lengend Snippet: SAHA Rescues Pregnancy Outcomes in RPL Mice via TRIM28-DNMT1-IL10 Axis. A Representative uterine horns (Day 12.5 p.c.): black arrows = resorbed embryos; red arrows = healthy embryos. B Fetal resorption rates. C – D Decidual Breg TRIM28 ( C ) and DNMT1 ( D ) mRNA levels (RT-qPCR). E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing). F Decidual Breg IL-10 secretion (ELISA). G - H Decidual Breg suppressive effects (Teff co-culture). Data of bar graphs are presented as mean ± SD. Each dot in bars presents one sample. Statistics: One-way ANOVA + Tukey’s test. ** p < 0.01, *** p < 0.001, **** p < 0.0001

Article Snippet: E Decidual Breg Il10 promoter methylation (bisulfite pyrosequencing).

Techniques: Quantitative RT-PCR, Methylation, Enzyme-linked Immunosorbent Assay, Co-Culture Assay

Journal: Oncotarget

Article Title: Inhibition of DNA methyltransferase as a novel therapeutic strategy to overcome acquired resistance to dual PI3K/mTOR inhibitors

doi:

Figure Lengend Snippet: (A) PPP2R2B CpG island methylation was determined in CNE2 and CNE2/235 cell lines using a pyrosequencing assay. (B) The levels of PPP2R2B mRNA were determined using a quantitative PCR assay in parental and resistant cell lines. (C) The interactions between MYC and PP2A and between P70 and PP2A were detected by immunoprecipitation in CNE2 and CNE2/235 cell lines. (D) The levels of PPP2R2B mRNA were examined by q-PCR after transfection with PPP2R2B shRNA in CNE2 and HONE1. (E) Effect of PPP2R2B knockdown with shRNA on MYC and P70 phosphorylation in CNE2 cell line. (F) Effect of PPP2R2B knockdown on the interactions between MYC and PP2A and between P70 and PP2A in the CNE2 cell line based on immunoprecipitation. (G) The sensitivity of CNE2 to BEZ235 after PPP2R2B knockdown by PPP2R2B shRNA using the MTT assay.

Article Snippet: The human PPP2R2B vector was from Origene (RC220271).

Techniques: Methylation, Pyrosequencing Assay, Real-time Polymerase Chain Reaction, Immunoprecipitation, Transfection, shRNA, MTT Assay

Journal: Oncotarget

Article Title: Inhibition of DNA methyltransferase as a novel therapeutic strategy to overcome acquired resistance to dual PI3K/mTOR inhibitors

doi:

Figure Lengend Snippet: (A) The mRNA levels of DNA methyltransferases were analyzed in CNE2 and CNE2/235 cell lines by q-PCR. (B) PPP2R2B and PTEN mRNA levels were analyzed in resistant cell lines after treatment with the DNA methylation inhibitor decitabine at the indicated concentrations for 72 h. (C) Effects of decitabine on the expression of survival pathway proteins at the indicated concentrations. (D) Effects of decitabine on the binding of MYC and PP2A and of P70 and PP2A in the CNE2/235 cell line. Cells were treated with 1 μM decitabine for 48 h. Immunoprecipitation was conducted. (E) Effect of the DNA methylation inhibitor decitabine on cell proliferation in the parental and resistant cell lines using the MTT assay. (F) Inhibitory effect of decitabine and BEZ235 on cell proliferation in CNE2 and CNE2/235 cell lines. Cells were treated for 5 d at the indicated concentrations. The MTT assay was conducted. (G) The IC50 values of BEZ235 with or without decitabine were determined in CNE2 and CNE2/235 cell lines using the MTT assay. The data shown are representative of 3 individual experiments.

Article Snippet: The human PPP2R2B vector was from Origene (RC220271).

Techniques: DNA Methylation Assay, Expressing, Binding Assay, Immunoprecipitation, MTT Assay

Journal: Oncotarget

Article Title: Inhibition of DNA methyltransferase as a novel therapeutic strategy to overcome acquired resistance to dual PI3K/mTOR inhibitors

doi:

Figure Lengend Snippet: (A) (B) Xenograft tumor growth of CNE2 and CNE2/235 cells in nude mice treated with BEZ235 at 25 mg/kg per day or decitabine 1.5 mg/kg three times per week. ( p values in CNE2: p = 0.27 in Decitabine vs slovent, p < 0.01 in BEZ235 vs NS, p < 0.01 in combination vs solvent, p = 0.55 in combination vs BEZ235; p values in CNE2/235: p = 0.90 in Decitabine vs slovent, p = 0.03 in BEZ235 vs NS, p < 0.01 in combination vs solvent, p = 0.03 in combination vs Decitabine) (C) The inhibitory rates of tumor growth were calculated as 100% × (1-average treated tumor size/average control tumor size). (D) Antitumor efficacy of BEZ235 and decitabine in vivo by tumor weight. Nude mice were killed, and tumors were isolated to weigh each tumor. (E) The mRNA levels of PPP2R2B and PTEN were determined by q-PCR in parental and resistant xenografts. (F) Protein expression of survival pathway components was determined by immunoblotting analysis in parental and resistant xenografts. (G) Protein expression of survival pathway components was determined in parental and resistant xenografts by immunoblotting analysis following treatment with decitabine in vivo .

Article Snippet: The human PPP2R2B vector was from Origene (RC220271).

Techniques: In Vivo, Isolation, Expressing, Western Blot