wt idh2  (BPS Bioscience)

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: In vitro inhibition of the inhibitors with homodimeric IDH enzymes

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques: In Vitro, Inhibition, Incubation

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: Identification of CP-17 as an inhibitor of IDH2/R140Q. a Structure-based in silico screening of a small molecule library (ChemDiv) for compounds that bind to the allosteric site of IDH2/R140Q identifies a hit compound CP-17 with IC 50 of 40.75 nM. HTVS: High-throughput Virtual Screening mode; SP: Standard-Precision mode; XP: Extra-Precision mode. b Structure of CP-17 binding at the allosteric site of IDH2/R140Q. The protein was represented as cartoon (colored in light blue and yellow for each monomer), the carbon atoms of CP-17 as magenta sticks, NADPH and Q140 as green sticks, and the Ca 2+ as black spheres. c Molecular interactions of CP-17 binding at the IDH2/R140Q dimer interface (light blue and yellow for carbon atoms of adjacent monomer residues). The hydrogen bonds between CP-17 and Q316 residue were labeled with red dotted lines

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques: In Silico, High Throughput Screening Assay, Binding Assay, Labeling

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: The calculated binding free energy of NADPHs with IDH2/R140Q in different complexes

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques: Binding Assay

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: Molecular dynamics (MD) simulations of IDH2/R140Q_CP-17, IDH2/R140Q_α-KG and IDH2/WT_CP-17 systems. a Evolution of RMSDs during 200 ns MD simulations. b Evolution of the Ile116-Leu289′ distances and the Ile116-Phe148-Leu289′ angles (measured on Cα atoms) in monomers A and B during MD simulations

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques:

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: The average distances of Ile116-Leu289’ and angles of Ile116-Phe148-Leu289’ between Cα atoms calculated from the 100–200 ns MD simulation trajectory

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques:

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: Conformational changes of IDH2/WT bound with CP-17 after MD simulation. RMSD matrices of IDH2/R140Q_CP-17 a and IDH2/WT_CP-17 b systems during MD simulation. c Representation of surface maps of CP-17 bound IDH2/WT structure, with the catalytic sites of monomer A in an active closed conformation (left) and monomer B in an inactive open conformation (right)

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques:

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: CP-17 treatment reversed GM-CSF-independent growth induced by IDH2/R140Q. IDH2/R140Q expression confers GM-CSF independent growth of the TF-1 cells. Proliferation of TF-1(IDH2/R140Q) ( a ) and TF-1(WT) ( b ) cells with the treatment of CP-17. (* P < 0.01 vs 7 day of Control, # P < 0.01 vs 0 day of Control). The variance is similar between the groups that are being statistically compared

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques: Expressing

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: CP-17 reversed the TF-1(IDH2/R140Q) differentiation block. a IC 50 value of intracellular D-2-HG inhibition by CP-17 treatment in TF-1(IDH2/R140Q) cells. b TF-1(WT) or TF-1(IDH2/R140Q) cells were induced with 50 ng/mL EPO to differentiate for 7 days in the presence of 0, 1 μM, and 3 μM of CP-17. After then cells were collected, and color change induced by hemoglobin γ expression was photographed. D-2-HG level and hemoglobin γ protein expression were detected with LC-MS and western blot respectively

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques: Blocking Assay, Inhibition, Expressing, Liquid Chromatography with Mass Spectroscopy, Western Blot

Journal: Cell Communication and Signaling : CCS

Article Title: Identification of a selective inhibitor of IDH2/R140Q enzyme that induces cellular differentiation in leukemia cells

doi: 10.1186/s12964-020-00536-7

Figure Lengend Snippet: CP-17 decreased high level of histone methylation in TF-1(IDH2/R140Q) cells. TF-1(IDH2/R140Q) and TF-1(WT) cells were treated with CP-17 (1 μM, 3 μM) for 7 days, after which expression levels of H3K4Me3, H3K9Me3, H3K27Me3 and H3 were assessed by western blot with specific antibodies. The total amount of H3 was used as loading control

Article Snippet: The human recombinant C-terminal FLAG-tag IDH enzymes including IDH2/R140Q, IDH2/WT, IDH1/R132H and IDH1/WT homodimer were purchased from BPS Bioscience (San Diego, USA).

Techniques: Methylation, Expressing, Western Blot

Journal: The FASEB Journal

Article Title: IDH2 reprograms mitochondrial dynamics in cancer through a HIF-1α–regulated pseudohypoxic state

doi: 10.1096/fj.201901366r

Figure Lengend Snippet: Figure 1. IDH2 regulation of mitochondrial bioenergetics. A) Prostate adenocarcinoma PC3 cells were transfected with control nontargeting siRNA (siCtrl) or 2 independent IDH2-directed siRNAs (#3 and #5) and analyzed by Western blotting. B) PC3 cells were transfected with siCtrl or IDH1- or IDH2-directed siRNA and analyzed by Western blotting. C, D) PC3 cells transfected as in B were analyzed for OCRs on a Seahorse XFe96 Bioenergetics Flux Analyzer [representative tracings; n = 2 (C)], and basal (left) and maximal (right) respiratory capacities were quantified (D). Means 6 SD (n = 22). *P , 0.01, ***P , 0.0001. E) The conditions are as in B, and transfected PC3 cells were analyzed for ECARs on a Seahorse XFe96 Bioenergetics Flux Analyzer. Representative tracings (n = 2). F) PC3 cells transfected as in B were analyzed for glucose consumption (Glu) or lactate production (Lac). Means 6 SD (n = 6). *P = 0.01, **P = 0.001, ***P , 0.0001. G) The conditions are as in B, and siRNA- transfected PC3 cells were analyzed for the rate of ATP production on a Seahorse XFe96 Bioenergetics Flux Analyzer. Means 6

Article Snippet: Plasmid cDNAs encoding WT IDH2 or IDH2 Arg172Lys (R172K) neomorphic mutant were from Addgene (Watertown, MA, USA).

Techniques: Transfection, Control, Western Blot

Journal: The FASEB Journal

Article Title: IDH2 reprograms mitochondrial dynamics in cancer through a HIF-1α–regulated pseudohypoxic state

doi: 10.1096/fj.201901366r

Figure Lengend Snippet: Figure 2. IDH2 controls mitochondrial dynamics. A) PC3 cells transfected with siCtrl or siIDH2 were analyzed for mitochondrial morphology by confocal laser microscopy. Representative images. Scale bars, 10 mm. Insets, magnification of indicated areas. B) PC3 cells transfected with siCtrl, 3 independent IDH2-directed siRNAs (1, 2, 3), or IDH2-directed pooled siRNA (P) were quantified for mitochondrial volume. Means 6 SD (n = 29–33). *P = 0.01, ***P = 0.0002–0.0003. C) The conditions are as in A, and siRNA-transfected PC3 cells were analyzed for changes in mitochondrial dimension indicative of organelle fusion (.1.3-fold change in mitochondrial volume, positive y scale) or fission (,0.7-fold change in mitochondrial volume, negative y scale), and events were quantified continuously by time-lapse videomicroscopy at the indicated time intervals. Each tracing corresponds to an individual cell. Representative experiment (n = 2). D) The conditions are as in C, and mitochondrial fusion and fission events (60-s interval) were quantified in siRNA-transfected DU145 cells. Means 6 SD (n = 13–14). *P = 0.01, **P = 0.001. E) PC3 cells transfected with siCtrl or siIDH2 were fractionated in total (TE), cytosolic (CE), or mitochondrial (ME) extracts and analyzed by Western blotting. F) PC3 cells transfected as in A were labeled with MitoTracker plus an antibody to Ser616-phosphorylated Drp1 and analyzed for signal colocalization by confocal fluorescence microscopy. Representative images (n = 3). G) The experimental conditions are as in F, and colocalization of Ser616-phosphorylated Drp1 and MitoTracker was quantified with determination of a Pearson’s correlation index (PCI). Means 6 SD (n = 24–31). *P = 0.01, **P = 0.009, ***P , 0.0001. H) PC3 cells transfected with siCtrl or siIDH2 were analyzed for mitochondrial motility in 2D contour plots in the presence or absence of Drp1-directed siRNA (siDrp1). Each tracing corresponds to the movement of an individual mitochondrion. The cutoff velocities for slow-moving or fast-moving (,16 nm/s or .16 nm/s, respectively) mitochondria are indicated. Representative experiment (n = 2). I) The conditions are as in H, and the speed of mitochondrial movements (top; n = 45–50) and total distance traveled by individual mitochondria (bottom; n = 47–50) were quantified. FI, fold increase; siCtrl, control nontargeting siRNA; VDAC, voltage- dependent anion channel. *P = 0.01, **P = 0.001-0.003, ***P , 0.0001.

Article Snippet: Plasmid cDNAs encoding WT IDH2 or IDH2 Arg172Lys (R172K) neomorphic mutant were from Addgene (Watertown, MA, USA).

Techniques: Transfection, Microscopy, Western Blot, Labeling, Control

Journal: The FASEB Journal

Article Title: IDH2 reprograms mitochondrial dynamics in cancer through a HIF-1α–regulated pseudohypoxic state

doi: 10.1096/fj.201901366r

Figure Lengend Snippet: Figure 3. IDH2 regulation of tumor cell movements. A) PC3 cells transfected with siCtrl or siIDH2 were labeled with Talin-Red Fluorescent Protein (RFP) and analyzed for FA complex dynamics by time-lapse videomicroscopy. Representative merged frames at 0 h (magenta) and 2 h (cyan) are shown (n = 2). Arrows, position of new, stable, and decayed FA complexes. B) The conditions are as in A, and the percentage of new, stable, or decayed FA complexes was quantified per each condition (siCtrl, n = 12; siIDH2, n = 7). *P = 0.04. C) PC3 cells stably transduced with shCtrl or 3 independent IDH2-directed shRNAs (D11, D12, E1) were analyzed by Western blotting. P, phosphorylated. D) PC3 cells were transfected with siCtrl or siIDH2 and analyzed for cellular motility in 2D contour plots in the presence or absence of Drp1-directed siRNA (siDrp1). Each tracing corresponds to the movements of an individual cell. The cutoff velocities for slow-moving or fast-moving cells (,0.69 or .0.69 mm/min, respectively) are indicated. E, F) The conditions are as in D, and the speed of cell motility n = 45–66 (E)] and total distance traveled by individual cells [n = 58–66 (F)] was quantified. *P = 0.01, **P = 0.003, ***P , 0.0001. G, H) PC3 cells transfected with siCtrl or siIDH2 were analyzed for directional cell migration in a wound-closure assay (G), and the area covered by cell migration was quantified at the indicated time intervals (H). Representative images (n = 3). BAF, binary area fraction; shCtrl, control nontargeting shRNA; siCtrl, control nontargeting siRNA.

Article Snippet: Plasmid cDNAs encoding WT IDH2 or IDH2 Arg172Lys (R172K) neomorphic mutant were from Addgene (Watertown, MA, USA).

Techniques: Transfection, Labeling, Stable Transfection, Transduction, Western Blot, Migration, Wound Closure Assay, Control, shRNA

Journal: The FASEB Journal

Article Title: IDH2 reprograms mitochondrial dynamics in cancer through a HIF-1α–regulated pseudohypoxic state

doi: 10.1096/fj.201901366r

Figure Lengend Snippet: Figure 4. Requirements IDH2 regulation of tumor cell motility. A) PC3 cells transfected with siCtrl or siIDH2 were analyzed for cell migration (top) or invasion across Matrigel-coated Transwell inserts (bottom). Representative images of DAPI-stained nuclei of migrated or invaded cells are shown. B) PC3 (top, n = 21–25) or DU145 (bottom, n = 22–24) cells were transfected with siCtrl, 3 independent IDH2-directed siRNAs (#1, #2, #3), or IDH2-directed pooled siRNA (P) and analyzed for Matrigel invasion. Means 6 SD. *P = 0.02, ***P , 0.0001. C) PC3 cells transfected as in A were reconstituted with IDH2 cDNA and analyzed for cell migration (top, n = 21–22) or Matrigel invasion (bottom, n = 21–22). Means 6 SD. ***P , 0.0001. D, E) PC3 cells transfected with siCtrl or siIDH2 were further transfected with Drp1-directed siRNA (siDrp1) and analyzed by Western blotting (D) or Matrigel invasion [n = 37–45 (E)]. Means 6 SD. ***P , 0.0001. F, G) PC3 cells transfected with siCtrl or siIDH2 were incubated with small molecule Akt inhibitor, MK2206, and analyzed by Western blotting (F) or Matrigel invasion (G). siCtrl, control nontargeting siRNA; ns, not significant; p, phosphorylated. Means 6 SD (n = 22–24). ***P , 0.0001.

Article Snippet: Plasmid cDNAs encoding WT IDH2 or IDH2 Arg172Lys (R172K) neomorphic mutant were from Addgene (Watertown, MA, USA).

Techniques: Transfection, Migration, Staining, Western Blot, Incubation, Control

Journal: The FASEB Journal

Article Title: IDH2 reprograms mitochondrial dynamics in cancer through a HIF-1α–regulated pseudohypoxic state

doi: 10.1096/fj.201901366r

Figure Lengend Snippet: Figure 5. ROS regulation of IDH2-directed tumor cell motil- ity. A) PC3 cells transfected with siCtrl or siIDH2 were reconsti- tuted with Prx3 or loss-of-func- tion Cys108Ser (C108S) Prx3 mutant (Prx3-Mut) and quanti- fied for speed of mitochondrial movements (top, n = 85–92) or distance traveled by individual mitochondria (bottom, n = 85–92). ***P , 0.0001. B) The conditions are as in A, and reconstituted PC3 cells were analyzed for cell motility in 2D contour plots. Each tracing corresponds to the movement of an individual cell. The cutoff velocities for slow-moving or fast-moving (,0.39 mm/min or .0.39 mm/min, respectively) cells are shown. Representative experiment (n = 3). C, D) PC3 cells transfected with siCtrl or siIDH2 and reconstituted as in A were analyzed for cell migra- tion [top n = 10–14 (C)] or Matrigel invasion [bottom n = 10–12 (C)] or Western blotting (D). Means 6 SD. ***P , 0.0001. E) PC3 cells transfected with siCtrl or siIDH2 were in- cubated with the ROS scaven- ger, MnTBAP, and analyzed by Western blotting. Ns, not signif- icant; p, phosphorylated.

Article Snippet: Plasmid cDNAs encoding WT IDH2 or IDH2 Arg172Lys (R172K) neomorphic mutant were from Addgene (Watertown, MA, USA).

Techniques: Transfection, Mutagenesis, Western Blot

Journal: The FASEB Journal

Article Title: IDH2 reprograms mitochondrial dynamics in cancer through a HIF-1α–regulated pseudohypoxic state

doi: 10.1096/fj.201901366r

Figure Lengend Snippet: Figure 6. HIF-1a regulation by IDH2. A) PC3 (left) or DU145 (right) cells transfected with siCtrl, 3 independent IDH2-directed siRNAs (1, 2, 3), or pooled IDH2-directed siRNA (P) were analyzed by Western blotting. B) PC3 cells stably transduced with 2 independent control shRNAs (shCtrl #1 and #2) or 3 IDH2-directed shRNAs (D11, D12, and E1) were analyzed by Western blotting. C) PC3 cells transfected with siCtrl, siIDH1, or siIDH2 were analyzed by Western blotting. D) PC3 cells transfected with siCtrl or siIDH2 were reconstituted with vector or IDH2 cDNA and analyzed by Western blotting. E) PC3 cells transfected as in C were analyzed at the indicated time intervals by Western blotting. Bar graph (bottom), densitometric quantification of HIF-1a protein bands. F) PC3 (top) or DU145 (bottom) cells transfected with siCtrl or siIDH2 were incubated with the ROS scavenger, MnTBAP, and analyzed by Western blotting. G) PC3 cells transfected with siCtrl or siIDH2 were reconstituted with Prx3 or loss-of- function C108S Prx3 mutant (Prx3-Mut) and analyzed by Western blotting. H) PC3 cells transfected with siCtrl, siIDH2, or siHIF- 1a were analyzed for cell motility in 2D contour plots. Each line corresponds to the movements of an individual cell. The cutoff velocities for slow-moving or fast-moving (,0.45 mm/min or .0.45 mm/min) cells are indicated. Representative experiment (n = 2). I) The conditions are as in H, and the speed of cell movements (top, n = 58–64) and total distance traveled by individual cells (bottom, n = 58–64) was quantified per each condition. *P = 0.01, ***P , 0.0001. J) The conditions are as in H, and siRNA- transfected PC3 cells were analyzed for cell migration (top, n = 13–16) or Matrigel invasion (bottom, n = 23–31). Ns, not significant; shCtrl, control nontargeting shRNA; siCtrl, control nontargeting siRNA. Means 6 SD. ***P = 0.0002 to P , 0.0001.

Article Snippet: Plasmid cDNAs encoding WT IDH2 or IDH2 Arg172Lys (R172K) neomorphic mutant were from Addgene (Watertown, MA, USA).

Techniques: Transfection, Western Blot, Stable Transfection, Transduction, Control, Plasmid Preparation, Incubation, Mutagenesis, Migration, shRNA