Journal: Cell death & disease

Article Title: DEF6(differentially exprehomolog) exacerbates pathological cardiac hypertrophy via RAC1.

doi: 10.1038/s41419-023-05948-0

Figure Lengend Snippet: Fig. 1 The expression of DEF6 is increased in hypertrophic hearts and cardiomyocytes. A mRNA levels of DEF6 in the LV myocardium of mice subjected to sham or 4 weeks of TAC surgery (n = 5). B Immunoblot analyses (left) and results of quantification (right) of DEF6 protein expression in the LV myocardium of mice subjected to sham or 4 weeks of TAC surgery (n = 4). C mRNA levels of DEF6 in NRCMs administrated with PBS or 24 h of PE (50 μM) (n = 5). D Immunoblot analyses (left) and results of quantification (right) of DEF6 protein expression in NRCMs administrated with PBS or 24 h of PE (n = 4). *P < 0.05, ***P < 0.001 vs. sham or PBS. Data are displayed as mean ± SD. Statistical analysis were conducted by two-tailed Student’s t test (A, C) or Mann–Whitney U test (B, D).

Article Snippet: The cardiomyocytes were cultured in DMEM/F12 medium (Gibco, C11330) added with 10% fetal bovine serum (FBS), 5-bromodeoxyuridine (0.1 mM), and 1% penicillin/streptomycin for 24 h. The NRCMs were infected with adenoviruses at a multiplicity of infection (MOI) of 100 for 6 h. Subsequently, the medium was replaced with serum-free DMEM/F12, and 12 h later, the cardiomyocytes were stimulated with phosphatebuffered saline (PBS) or PE (50 μM) for 24 h. For rescue experiments, the cardiomyocytes were treated with Rac1 inhibitor NSC23766 (50 μM, 24 h) (S8031, Selleck) before adenovirus infection [31].

Techniques: Expressing, Western Blot, Two Tailed Test, MANN-WHITNEY

Journal: Cell death & disease

Article Title: DEF6(differentially exprehomolog) exacerbates pathological cardiac hypertrophy via RAC1.

doi: 10.1038/s41419-023-05948-0

Figure Lengend Snippet: Fig. 2 Ablation of DEF6 mitigates TAC-induced cardiac hypertrophy. A Strategy to construct KO mice and the sequencing results of WT and KO mice. B Protein levels of cardiac DEF6 in WT and KO mice (n = 5). C Comparisons of HW, HW/BW, LW/BW, and HW/TL in WT and KO mice subjected to sham or 4 weeks of TAC surgery (n = 10). D Left, gross hearts and H&E-stained LV sections of each groups. Scale bars, 0.3 cm and 50 μm, respectively. Right, Comparisons of cardiomyocyte cross-sectional area from groups (n = 6). E RT-PCR analyses of the hypertrophic markers in the indicated groups (n = 4). F–H Comparisons of the LVEDd, LVESd, LVPWd, FS, and EF values in WT and KO mice subjected to sham or 4 weeks of TAC surgery (n = 10). I Left, PSR-stained LV sections in WT and KO mice subjected to sham or 4 weeks of TAC surgery. Scale bars, 50 μm. Right, comparisons of LV collagen volume between groups (n = 6). J RT-PCR analysis of the fibrotic markers in each groups (n = 4). *P < 0.05, **P < 0.01, ***P < 0.001 vs. WT sham, #P < 0.05, ##P < 0.01, ###P < 0.001 vs. WT TAC. Data are displayed as mean ± SD. Statistical analysis were conducted by One-way ANOVA (C, D, F–I) or Kruskal–Wallis test (E, J).

Article Snippet: The cardiomyocytes were cultured in DMEM/F12 medium (Gibco, C11330) added with 10% fetal bovine serum (FBS), 5-bromodeoxyuridine (0.1 mM), and 1% penicillin/streptomycin for 24 h. The NRCMs were infected with adenoviruses at a multiplicity of infection (MOI) of 100 for 6 h. Subsequently, the medium was replaced with serum-free DMEM/F12, and 12 h later, the cardiomyocytes were stimulated with phosphatebuffered saline (PBS) or PE (50 μM) for 24 h. For rescue experiments, the cardiomyocytes were treated with Rac1 inhibitor NSC23766 (50 μM, 24 h) (S8031, Selleck) before adenovirus infection [31].

Techniques: Construct, Sequencing, Staining, Reverse Transcription Polymerase Chain Reaction

Journal: Cell death & disease

Article Title: DEF6(differentially exprehomolog) exacerbates pathological cardiac hypertrophy via RAC1.

doi: 10.1038/s41419-023-05948-0

Figure Lengend Snippet: Fig. 3 Overexpression of DEF6 aggravates TAC-induced cardiac hypertrophy. A mmunoblot analyses (left) and results of quantification (right) of DEF6 protein expression in the hearts of mice injected with AAV9-vector or AAV9-DEF6 (n = 4). B Comparisons of HW, HW/BW, LW/ BW, and HW/TL in AAV9-vector- and AAV9-DEF6-infected mice subjected to sham or 4 weeks of TAC surgery (n = 10). C Left, gross hearts and H&E-stained LV sections of each groups. Scale bars, 0.3 cm and 50 μm, respectively. Right, Comparisons of cardiomyocyte cross-sectional area between groups (n = 6). D RT-PCR analyses of the hypertrophic markers in each groups (n = 4). E–G Comparisons of LVEDd, LVESd, LVPWd, FS, and EF in AAV9-vector- and AAV9-DEF6-infected mice subjected to sham or 4 weeks of TAC surgery (n = 10). H Left, PSR-stained LV sections in AAV9-vector- and AAV9-DEF6-infected mice subjected to sham or 4 weeks of TAC surgery. Scale bars, 50 μm. Right, comparisons of LV collagen volume between groups (n = 6). I RT-PCR analyses of the fibrotic markers in each groups (n = 4). *P < 0.05, **P < 0.01, ***P < 0.001 vs. AAV9- vector or AAV9-vector sham, #P < 0.05, ##P < 0.01, ###P < 0.001 vs. AAV9-vector TAC. Data are displayed as mean ± SD. Statistical analysis were conducted by Mann–Whitney U test (A) or One-way ANOVA (B, C, E–H) or Kruskal–Wallis test (D, I).

Article Snippet: The cardiomyocytes were cultured in DMEM/F12 medium (Gibco, C11330) added with 10% fetal bovine serum (FBS), 5-bromodeoxyuridine (0.1 mM), and 1% penicillin/streptomycin for 24 h. The NRCMs were infected with adenoviruses at a multiplicity of infection (MOI) of 100 for 6 h. Subsequently, the medium was replaced with serum-free DMEM/F12, and 12 h later, the cardiomyocytes were stimulated with phosphatebuffered saline (PBS) or PE (50 μM) for 24 h. For rescue experiments, the cardiomyocytes were treated with Rac1 inhibitor NSC23766 (50 μM, 24 h) (S8031, Selleck) before adenovirus infection [31].

Techniques: Over Expression, Expressing, Injection, Plasmid Preparation, Infection, Staining, Reverse Transcription Polymerase Chain Reaction, MANN-WHITNEY

Journal: Cell death & disease

Article Title: DEF6(differentially exprehomolog) exacerbates pathological cardiac hypertrophy via RAC1.

doi: 10.1038/s41419-023-05948-0

Figure Lengend Snippet: Fig. 4 DEF6 exacerbates PE-induced cardiomyocyte hypertrophy. A Immunoblot analyses (left) and results of quantification (right) of DEF6 protein expression in cultured NRCMs infected with AdshRNA or AdshDEF6 (n = 3). B Left, immunofluorescence staining (α-actinin, red) in cultured NRCMs infected with AdshRNA or AdshDEF6 and administrated with PBS or 24 h of PE. Scale bar, 20 μm. Right, comparisons of the cardiomyocyte surface areas in cultured NRCVs of each groups (n ≥48 cells per group). C RT-PCR analysis of the hypertrophic markers in cultured NRCVs of each groups (n = 3). D Immunoblot analyses (left) and results of quantification (right) of DEF6 protein expression in cultured NRCVs infected with Advector or AdDEF6 (n = 3). E Left, immunofluorescence staining (α-actinin, red) in cultured NRCMs infected with Advector or AdDEF6 and administrated with PBS or 24 h of PE. Scale bar, 20 μm. Right, comparisons of the cardiomyocyte surface areas in cultured NRCVs of each groups (n ≥48 cells per group). F RT-PCR analyses of the hypertrophic markers in cultured NRCVs of each groups (n = 3). *P < 0.05, **P < 0.01, ***P < 0.001 vs. AdshRNA or AdshRNA PBS or Advector or Advector PBS, #P < 0.05, ##P < 0.01, ###P < 0.001 vs. AdshRNA PE or Advector PE. Data are displayed as mean ± SD. Statistical analysis were conducted by two-tailed Mann–Whitney U test (A, D) or One-way ANOVA (B, E) or Kruskal–Wallis test (C, F).

Article Snippet: The cardiomyocytes were cultured in DMEM/F12 medium (Gibco, C11330) added with 10% fetal bovine serum (FBS), 5-bromodeoxyuridine (0.1 mM), and 1% penicillin/streptomycin for 24 h. The NRCMs were infected with adenoviruses at a multiplicity of infection (MOI) of 100 for 6 h. Subsequently, the medium was replaced with serum-free DMEM/F12, and 12 h later, the cardiomyocytes were stimulated with phosphatebuffered saline (PBS) or PE (50 μM) for 24 h. For rescue experiments, the cardiomyocytes were treated with Rac1 inhibitor NSC23766 (50 μM, 24 h) (S8031, Selleck) before adenovirus infection [31].

Techniques: Western Blot, Expressing, Cell Culture, Infection, Staining, Reverse Transcription Polymerase Chain Reaction, Two Tailed Test, MANN-WHITNEY

Journal: Cell death & disease

Article Title: DEF6(differentially exprehomolog) exacerbates pathological cardiac hypertrophy via RAC1.

doi: 10.1038/s41419-023-05948-0

Figure Lengend Snippet: Fig. 6 Prohypertrophic effect of DEF6 depends on Rac1-MEK-ERK signaling. A Co-IP of DEF6 was performed with anti-Flag and probed by Western blots with anti-HA (left); Co-IP of Rac1 was performed with anti-HA and probed by Western blots with anti-Flag (right). B In vitro GST pulldown assays for the interaction of purified Flag-DEF6 and GST-HA-Rac1 (left), as well as Flag-Rac1 and GST-HA-DEF6 (right). C The activity of Rac1 changes in the same direction as the DEF6 expression. D Immunoblot analyses of total and activated MEK1/2, ERK1/2 in cultured NRCMs infected with Advector or AdDEF6 and treated with PBS or NSC23766 (50 μM, 24 h) under 24 h of PE treatment (50 μM) (n = 3). E Immunofluorescence staining (α-actinin, red) (left) and comparison of cardiomyocyte surface areas (right) of NRCMs infected with Advector and AdDEF6 and treated with PBS or NSC23766 (50 μM, 24 h) under 24 h of PE treatment (50 μM). (n ≥48 cells per group). F RT-PCR analysis of the hypertrophic markers in cultured NRCVs of each groups (n = 3). G Immunoblot analyses of total and activated MEK1/2, ERK1/2 in cultured NRCMs infected with AdshRNA or AdshDEF6 and with Adcontrol or AdRac1(G12V) under PE 24 h of PE treatment (50 μM) (n = 3). H Immunofluorescence staining (α-actinin, red) (left) and comparison of cardiomyocyte surface areas (right) of NRCMs infected with the indicated adenovirus and administrated with 24 h of PE (50 μM) (n ≥48 cells per group). I RT-PCR analysis of the hypertrophic markers in cultured NRCVs of each groups (n = 3). •P < 0.05, P < 0.01,•P < 0.001 vs. Advector PBS PE or AdshRNA Adcontrol PE, *P < 0.05, **P < 0.01, ***P < 0.001 vs. Advector PBS PE or AdshRNA Adcontrol PE, ###P < 0.001 vs. AdDEF6 PBS PE or AdshDEF6 Adcontrol PE, and n.s. indicates no significance. Data are displayed as mean ± SD. Statistical analysis were conducted by Kruskal–Wallis test.

Article Snippet: The cardiomyocytes were cultured in DMEM/F12 medium (Gibco, C11330) added with 10% fetal bovine serum (FBS), 5-bromodeoxyuridine (0.1 mM), and 1% penicillin/streptomycin for 24 h. The NRCMs were infected with adenoviruses at a multiplicity of infection (MOI) of 100 for 6 h. Subsequently, the medium was replaced with serum-free DMEM/F12, and 12 h later, the cardiomyocytes were stimulated with phosphatebuffered saline (PBS) or PE (50 μM) for 24 h. For rescue experiments, the cardiomyocytes were treated with Rac1 inhibitor NSC23766 (50 μM, 24 h) (S8031, Selleck) before adenovirus infection [31].

Techniques: Co-Immunoprecipitation Assay, Western Blot, In Vitro, Activity Assay, Expressing, Cell Culture, Infection, Staining, Comparison, Reverse Transcription Polymerase Chain Reaction

Journal: BMC complementary medicine and therapies

Article Title: Ginsenoside Rg3 attenuates myocardial ischemia/reperfusion-induced ferroptosis via the keap1/Nrf2/GPX4 signaling pathway.

doi: 10.1186/s12906-024-04492-4

Figure Lengend Snippet: Fig. 3 Erastin reversed the protective effect of ginsenoside Rg3 against OGD/R-induced injury in H9C2 cardiomyocytes. (A, B) Ferrous iron (Fe2+) and glutathione (GSH) levels in H9C2 cells were examined by kits. (C–E) The protein levels of GPX4 and FTH1 in H9C2 cells were examined by Western blot ting. The data are shown as the means ± SDs (n = 3). *p < 0.05, **p < 0.01, ***p < 0.001, the Ctrl group, the OGD/R + Rg3 group or the OGD/R + Rg3 + Erastin group vs. the OGD/R group

Article Snippet: Cell culture and oxygen-glucose deprivation/reperfusion (OGD/R) model H9C2 cardiomyocytes were obtained from BeiNa Biological Technology Co., Ltd. and cultured in DMEM supplemented with 10% FBS (Invitrogen) at 37 °C in a 5% CO2 incubator.

Techniques: Western Blot

Journal: Stem Cells Translational Medicine

Article Title: Detection of residual pluripotent stem cells in cell therapy products utilizing droplet digital PCR: an international multisite evaluation study

doi: 10.1093/stcltm/szae058

Figure Lengend Snippet: Precision of ddPCR assay using the same RNA samples prepared from iPSC-spiked cardiomyocytes and human heart in step 1 study.

Article Snippet: Cryopreserved iCell CM was thawed with iCell Cardiomyocytes Plating Medium (FUJIFILM Cellular Dynamics) according to the manufacturer’s instructions.

Techniques:

Journal: iScience

Article Title: High-throughput longitudinal electrophysiology screening of mature chamber-specific hiPSC-CMs using optical mapping

doi: 10.1016/j.isci.2023.107142

Figure Lengend Snippet:

Article Snippet: Human ECM-coated cell culture plates (CELLvo MatrixPlus, StemBioSys, Inc.) promoted significant maturation of hiPSC-CM toward rod-shaped cells reminiscent of cardiomyocytes isolated from adult mammalian hearts ( and ). hiPSC-CM sarcomere length was longer and more organized in cells maintained on MatrixPlus-human ECM ( C and 1D).

Techniques: Virus, Plasmid Preparation, Recombinant, Membrane, Isolation, Software

Journal: Scientific reports

Article Title: ETV1 activates a rapid conduction transcriptional program in rodent and human cardiomyocytes.

doi: 10.1038/s41598-018-28239-7

Figure Lengend Snippet: Figure 2. Cardiomyocyte-specific knockout of ETV1 slows atrial and His-Purkinje system conduction. Etv1flox/

Article Snippet: P1 NRVM heart lysates were purified using Miltenyi Biotec rat neonatal cardiomyocyte isolation kit (Miltenyi Biotec, 130–105–420) according to the manufacture’s protocol.

Techniques: Knock-Out

Journal: Scientific reports

Article Title: ETV1 activates a rapid conduction transcriptional program in rodent and human cardiomyocytes.

doi: 10.1038/s41598-018-28239-7

Figure Lengend Snippet: Figure 3. Cardiomyocyte deletion of ETV1 resulted in decreased expression of fast conduction genes in atrial and His-Purkinje system (HPS) myocytes. (A) Quantitative RT-PCR of fast conduction gene RNA levels (normalized to Gapdh) comparing 10–12-week-old Etv1 WT (Etv1flox/flox) and Etv1 cKO (Etv1flox/flox, Myh6- Cre) FACS-purified ventricular, atrial, and Purkinje myocytes. Relative Nkx2–5, Gja5, and Scn5a expression displayed versus control, Etv1 WT (n = 4). (B) Immunoblot assessment of Etv1 WT and Etv1 cKO atrial tissue lysates detecting NKX2–5, Cx40, NaV1.5, and Vinculin (loading control). (C) Protein level densitometric quantification (normalized to vinculin), displayed relative to Etv1 WT (n = 5). (D) Immunofluorescence evaluation of NKX2–5, Cx40, and NaV1.5 expression in 10-week-old Etv1 WT and Etv1 cKO atria/ventricular sections. (E) Immunofluorescence evaluation of NKX2–5, Cx40, and NaV1.5 expression in 10-week-old Etv1 WT and Etv1 cKO HPS sections. Positive CNTN2 expression identified HPS cells. Nuclei were identified by DAPI (blue). LA, left atria; LV, left ventricle. Data represent mean ± SEM. *P < 0.05, 2-tailed Student’s t test. Scale bars: 50 um.

Article Snippet: P1 NRVM heart lysates were purified using Miltenyi Biotec rat neonatal cardiomyocyte isolation kit (Miltenyi Biotec, 130–105–420) according to the manufacture’s protocol.

Techniques: Expressing, Quantitative RT-PCR, Purification, Control, Western Blot, Immunofluorescence

Journal: Scientific reports

Article Title: ETV1 activates a rapid conduction transcriptional program in rodent and human cardiomyocytes.

doi: 10.1038/s41598-018-28239-7

Figure Lengend Snippet: Figure 5. ETV1 regulates the diversity of sodium channel biophysical properties between ventricular, atrial, and Purkinje myocytes. Whole-cell patch clamp data from dissociated cardiomyocytes (ventricular, right atrial, Purkinje myocytes) using 10–12 week-old Etv1 WT (Etv1flox/flox) and Etv1 cKO (Etv1flox/flox, Myh6-Cre) mice in a Cntn2-EGFP background (n = 4). (A) Comparison of sodium current–voltage (I–V) relationship. Maximum conductance was calculated to assess significant differences among experimental groups. (B) Voltage dependence of steady-state activation. Voltage at half activation (V0.5, activation) was calculated to assess significant differences among experimental groups. (C) Voltage dependence of steady-state inactivation. Voltage at half inactivation (V0.5, inactivation) was calculated to assess significant differences among experimental groups. (D) Time course of recovery from inactivation. Tau of recovery (τrecovery) was calculated to assess significant differences among experimental groups. Number of cells analyzed per cell type (ventricle, right atria, Purkinje) included in each graph legend. Patch clamp protocol diagrams are included for each endpoint. Data represent mean ± SEM. *P < 0.05, 1-way ANOVA.

Article Snippet: P1 NRVM heart lysates were purified using Miltenyi Biotec rat neonatal cardiomyocyte isolation kit (Miltenyi Biotec, 130–105–420) according to the manufacture’s protocol.

Techniques: Patch Clamp, Comparison, Activation Assay

Journal: Scientific reports

Article Title: ETV1 activates a rapid conduction transcriptional program in rodent and human cardiomyocytes.

doi: 10.1038/s41598-018-28239-7

Figure Lengend Snippet: Figure 6. ETV1-transduced neonatal rat ventricular myocytes (NRVMs) upregulates a His-Purkinje system gene signature. (A) Volcano plot of relative transcript expression from NRVMs transduced with either Ad-Etv1- EGFP or Ad-EGFP. RNA-sequencing (RNA-seq) comparison revealed a total of 9,236 differentially expressed genes (normalized counts ≥ 5, padj < 0.05). All significantly different genes (padj < 0.05) are labeled blue (downregulated) or red (enriched) and all nonsignificantly different transcripts labeled in gray. Of these there were 4,696 upregulated and 4,540 downregulated genes in Ad-Etv1-EGFP versus Ad-EGFP transduced NRVMs. (B) Functional clustering of upregulated genes in Ad-Etv1 transduced NRVMs highlighted significantly enriched ETV1-dependent cellular processes (top 20 non-redundant categories are shown). Pathways are color coded to represent genes clustered into functional classes for heat maps in C. (C) Comparative RNA-seq between 21-day-old (P21) wild-type mouse FACS-purified Purkinje cell (PC)/ventricular myocytes (VM) and Ad-Etv1-EGFP/Ad-EGFP transduced NRVMs. Heat map representation of 88 genes differentially expressed in Ad-Etv1-EGFP versus Ad-EGFP transduced NRVMs (n = 3) plotted adjacent to average fold change expression in PCs and VMs. Genes clustered into functional groups demonstrate that ETV1 regulates a PC transcriptome in neonatal cardiomyocytes.

Article Snippet: P1 NRVM heart lysates were purified using Miltenyi Biotec rat neonatal cardiomyocyte isolation kit (Miltenyi Biotec, 130–105–420) according to the manufacture’s protocol.

Techniques: Expressing, Transduction, RNA Sequencing, Comparison, Labeling, Functional Assay, Purification

Journal: Scientific reports

Article Title: ETV1 activates a rapid conduction transcriptional program in rodent and human cardiomyocytes.

doi: 10.1038/s41598-018-28239-7

Figure Lengend Snippet: Figure 8. Activation of ETV1 in human induced pluripotent stem cells-derived cardiomyocytes (hiPSC-CMs) leads to increased expression of rapid conduction genes and sodium current. (A) Schematic representation of hiPSC-CM generation and maturation (day 0–21), transduction of Ad-Etv1-EGFP or Ad-EGFP (day 24), and timepoint for experimentation (day 38–40). (B) Quantitative RT-PCR analysis of Etv1, NKX2–5, GJA5, SCN5A, and MYL2 in hiPSC-CM transduced with either Ad-Etv1-EGFP or Ad-EGFP (n = 4). (C) Whole-cell patch clamp was performed on Ad-Etv1-EGFP (n = 12) or Ad-EGFP (n = 9) transduced hiPSC-CMs. Sodium current–voltage (I–V) relationship comparison. (D) hiPSC-CM NaV peak conductance (gNaV-peak). gNaV-peak following −120 mV to −35 mV depolarization step was measured for Ad-Etv1-EGFP (n = 12) or Ad-EGFP (n = 9) transduced hiPSC-CMs. Data represent mean ± SEM. *P < 0.05, 2-tailed Student’s t test.

Article Snippet: P1 NRVM heart lysates were purified using Miltenyi Biotec rat neonatal cardiomyocyte isolation kit (Miltenyi Biotec, 130–105–420) according to the manufacture’s protocol.

Techniques: Activation Assay, Derivative Assay, Expressing, Transduction, Quantitative RT-PCR, Patch Clamp, Comparison