atr inhibitor gartisertib  (MedChemExpress)

Journal: Nature Communications

Article Title: DNA-PK-mediated phosphorylation of STAT6 establishes a non-canonical type 2 immunity axis to prevent macrophage senescence

doi: 10.1038/s41467-026-69996-8

Figure Lengend Snippet: A Immunoblots of pSTAT6 (pY641) and γH2AX in thioglycolate-elicited peritoneal macrophages (Thio-PM) with Etoposide (Eto) and IL-4 treatment. The right panel shows the relative intensity of pSTAT6 (pY641) ( n = 4 independent experiments). B Immunofluorescence images of staining (pSTAT6 (pY641), red; DAPI, blue) of IL-4-stimulated Thio-PMs treated with Eto. Scale bars 50 μm. Right panel shows the quantification of pSTAT6 (pY641) ( n = 3 biological replicates per group). C Immunoblots of pSTAT6 (pY641) and γH2AX in Eto-treated Thio-PMs with different inhibitors. KU55933, an inhibitor of ATM. Berzosertib, inhibitor of ATR. NU7026, inhibitor of DNA-PK. AZD7762, inhibitor of CHK1/2. The right panel shows the quantification of pSTAT6 (pY641) ( n = 3 independent experiments). D Immunoblots of pSTAT6 (pY641) and γH2AX in Eto-treated Cas9 tg/+ Thio-PMs with indicated sgRNA. The right panel shows the quantification of pSTAT6 (pY641)/tSTAT6 ( n = 3 independent experiments). E Dual luciferase reporter of STAT6 in RAW 264.7 cells treated with Eto and NU7026 ( n = 3 per group). Data are mean ± s.e.m. p-value was calculated by paired two-tailed Student’s t test ( A , D ), unpaired two-tailed Student’s t test ( B ), one-way ANOVA with Dunnett’s correction ( C , E ).

Article Snippet: IL-4 (20 ng/mL, PeproTech, #214-14), DNA-PK inhibitor NU7026 (10 μM, Selleck Chemicals, #S2893), ATM inhibitor KU55933 (10 μM, Selleck Chemicals, #S1092), ATR inhibitor Berzosertib (0.5 μM, Selleck Chemicals, #S7102), CHK1/2 inhibitor AZD7762 (1 μM, Selleck Chemicals, #S1532), STAT6 inhibitor AS1517499 (2 μM, Selleck Chemicals, #S8685), STING inhibitor H151 (1 μM, Selleck Chemicals, #S6652), PTP1B inhibitor (2 μM, Santa Cruz, #sc-222227), PU.1 inhibitor DB2313 (10 nM, MedChem Express, #HY-124629), EPAC inhibitor ESI-09 (10 μM, Selleck Chemicals, #S7499), hIL-4 (20 ng/mL, PeproTech, #200-04), LPS (100 ng/mL, Sigma-Aldrich, #L2630), IFNγ (20 ng/mL, PeproTech, #315-05) were used.

Techniques: Western Blot, Immunofluorescence, Staining, Luciferase, Two Tailed Test

Journal: PLOS Biology

Article Title: DNA damage induced by HIV-1 Vpr triggers epigenetic remodeling and transcriptional programs to enhance virus transcription and latency reactivation

doi: 10.1371/journal.pbio.3003621

Figure Lengend Snippet: (A) Immunofluorescence microscopy quantification of DDR activation and histone marks in HeLa cells infected with control or Vpr-expressing virus. Vpr-infected HeLa cells were infected for 24 hours and then treated with vehicle or 3 mM caffeine for 24 hours ( n = 50 cells). Analyses performed using a one-way ANOVA; ns, not significant; *** p < 0.001. The data underlying this Figure can be found in . (B) Immunofluorescence microscopy quantification of histone marks in HeLa cells infected with control or Vpr-expressing virus in the presence or absence of vehicle, 3 mM caffeine, 10 nM ATM i , or 10 μM ATR i ( n = 50 cells). Cells were infected for 24 hours prior to inhibitor treatment for 24 hours and preparation for immunofluorescence microscopy. Analyses performed using a one-way ANOVA; ns, not significant; *** p < 0.001. The data underlying this Figure can be found in . (C) Immunofluorescence microscopy quantification of histone marks in HeLa cells infected with control or virus expressing the indicated Vpr subtype consensus sequence. Cells were infected for 24 hours and then treated with vehicle or with 3mM caffeine for 24 hours prior to preparation for immunofluorescence microscopy ( n = 50 cells). Analyses performed using a one-way ANOVA; ns, not significant; *** p < 0.001. The data underlying this Figure can be found in . (D) Cell cycle analysis of DDR activation and histone marks in HeLa cells infected with control or Vpr-expressing viruses. Left, flow cytometric analysis of propidium iodide (PI) stained HeLa or MDM cells infected with the indicated virus. Right, flow cytometric analysis of immunolabeled and PI-stained HeLa cells infected with the indicated virus ( n = 4 experiment). Analyses performed using a one-way ANOVA; ns, not significant; *** p < 0.001; ** p < 0.01. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ).

Article Snippet: For inhibitor experiments, cells were treated 24-hours post-infection with either 10 nM ATM inhibitor (Fisher, #AZD1390), 10 μM ATR inhibitor (Fisher, #NU6027), 3 mM caffeine, 16 μM DNA-PK inhibitor #1 (MedChemExpress, #NU7026), or 16 μM DNA-PK inhibitor #2 (MedChemExpress #NU7441) for 24 hours.

Techniques: Immunofluorescence, Microscopy, Activation Assay, Infection, Control, Expressing, Virus, Sequencing, Cell Cycle Assay, Staining, Immunolabeling

Journal: PLOS Biology

Article Title: DNA damage induced by HIV-1 Vpr triggers epigenetic remodeling and transcriptional programs to enhance virus transcription and latency reactivation

doi: 10.1371/journal.pbio.3003621

Figure Lengend Snippet: (A) Top, schematic of proviruses used in these experiments. For these constructs, mCherry expression is driven off of the HIV promoter as opposed to being driven off of CMV. Bottom, flow cytometric analysis of HIV LTR activity in THP1 or HeLa cells infected with increasing MOI of the indicated viruses ( n = 3 experiments). For inhibitor treatments, cells were infected for 24 hours prior to a 24-hour treatment with 3 mM caffeine or combined ATM (10 nM)/ATR (10 μM) treatment. ns, not significant; * p < 0.05; ** p < 0.01; *** p < 0.001. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ). (B) Flow cytometric quantification of HIV LTR activity in primary MDMs infected with Vpr WT virus in the presence or absence of DDR inhibition ( n = 7 experiments). MDMs were infected for 24 hours prior to treating with combined ATM (10 nM)/ATR (10 μM) inhibitors for 24 hours. Cells were detached and mCherry fluorescence was quantified via flow cytometry. ** p < 0.01. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ). (C) Flow cytometric quantification of LTR-mCh MFI in infected HeLa cells subjected to ATM (10nM), ATR (10 μM), or combined ATM and ATR inhibition 48 hours post-infection (n = 5 experiments). Cells were detached and mCherry fluorescence was quantified via flow cytometry. ns, not significant. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ). (D) Top, schematic of proviruses used in these experiments. For these proviruses, BFP was incorporated into the gag gene to generate Gag-BFP proteins from the viral promoter. Bottom left, live cell fluorescence microscopy images of HeLa cells 48-hours post-co-transfection with the indicated Gag-BFP proviruses and an eGFP control plasmid. Bottom middle, flow cytometric histogram of BFP fluorescence in eGFP-positive HeLa cells. Bottom right, quantification of BFP MFI in eGFP-positive cells with or without DDR inhibition ( n = 3 experiments). Cells were co-transfected for 24 hours prior to adding the indicated inhibitor for 24 hours. Analyses performed using a one-way ANOVA; ns, not significant; *** p < 0.001; * p < 0.05. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ). (E) Diagram displaying the establishment of the HeLa latency model H-Lats (left) and representative live cell fluorescence microscopy images of H-Lat GFP expression when infected with indicated viruses. H-Lat cells were infected for 48 hours prior to being subjected to live cell fluorescence microscopy. Right, flow cytometric analysis of H-Lat GFP expression 48 hours post-infection with the indicated viruses. (F) Flow cytometric analysis of H-Lat reactivation following infection with increasing MOI of the indicated viruses in the presence or absence of DDR inhibition ( n = 3 experiments). Cells were infected for 24 hours prior to inhibitor treatment for 24 hours and preparation for flow cytometry. *** p < 0.001. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ). (G) Flow cytometric quantification of LTR-eGFP MFI in infected H-Lat cells subjected to ATM (10nM), ATR (10 μM), or combined ATM/ATR treatment. H-Lat cells were infected for 24 hours prior to a 24-hour inhibitor treatment and preparation for flow cytometry ( n = 5 experiments). ns, not significant; * p < 0.05. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ). (H) Flow cytometric analysis of CEM-GFP, J-Lat clone 10.6, and monocyte clone U1 latency models uninfected or infected with Vpr WT virus in the presence or absence of 3 mM caffeine ( n = 3 experiments). Cells were infected with increasing MOI of Vpr-expressing virus for 24 hours, treated with vehicle or 3 mM caffeine for 24 hours, and then subjected to flow cytometry. * p < 0.05; ** p < 0.01; *** p < 0.001. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ). (I) Flow cytometric quantification of LTR-eGFP MFI in H-Lat cells transiently expressing plasmids encoding Tat and/or Vpr and treated with 50 µM etoposide or vehicle ( n = 3 experiments). H-Lats were transfected with the indicated plasmid combination for 24 hours, treated with vehicle or etoposide for 24 hours, and then subjected to flow cytometry. Analyses performed using a one-way ANOVA; ** p < 0.01. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ).

Article Snippet: For inhibitor experiments, cells were treated 24-hours post-infection with either 10 nM ATM inhibitor (Fisher, #AZD1390), 10 μM ATR inhibitor (Fisher, #NU6027), 3 mM caffeine, 16 μM DNA-PK inhibitor #1 (MedChemExpress, #NU7026), or 16 μM DNA-PK inhibitor #2 (MedChemExpress #NU7441) for 24 hours.

Techniques: Construct, Expressing, Activity Assay, Infection, Virus, Inhibition, Fluorescence, Flow Cytometry, Microscopy, Cotransfection, Control, Plasmid Preparation, Transfection

Journal: PLOS Biology

Article Title: DNA damage induced by HIV-1 Vpr triggers epigenetic remodeling and transcriptional programs to enhance virus transcription and latency reactivation

doi: 10.1371/journal.pbio.3003621

Figure Lengend Snippet: (A) Immunofluorescence microscopy quantification of NFκB translocation, phosphorylated SP1 residue Ser101, phosphorylated cJun residues Ser63 and Ser73, and phosphorylated RNA polymerase II residues Ser2 and Ser5 in differentiated THP1 cells infected with Vpr WT or control viruses in the presence or absence of ATM, ATR, or DNA-PK inhibition ( n = 50 cells). Cells were infected for 24 hours, treated with vehicle or the indicated inhibitor for 24 hours, and then subjected to immunofluorescence microscopy. Analyses were performed using a one-way ANOVA; ns, not significant; ** p < 0.01; *** p < 0.001. The data underlying this Figure can be found in . (B) Representative immunofluorescence microscopy images of R-loop abundance in primary MDM and HeLa cells infected with indicated viruses 48 hours post-infection ( n = 50 cells). Analyses performed using a student t test; *** p < 0.001. (C–E) Immunofluorescence microscopy quantification of R-loop abundance in HeLa cells infected with indicated viruses 48 hours post-infection. Samples were left untreated (C) or treated with RNaseH (D, left), triptolide (D, right), or with the indicated DDR inhibitors (E), respectively ( n = 50 cells). For RNaseH treatment, cells were infected for 48 hours prior to methanol fixation and addition of recombinant RNaseH to deplete RNA associated with R-loops. For inhibitor treatments, HeLa cells were infected for 24 hours, treated with the indicated inhibitor for 24 hours, and then subjected to immunofluorescence microscopy. Analyses were performed using a one-way ANOVA; ns, not significant; ** p < 0.01; *** p < 0.001. The data underlying this Figure can be found in . (F) Immunofluorescence microscopy quantification of DDR activation (left) and R-loop abundance (right) in HeLa cells infected with indicated viruses and transfected with RNaseH constructs ( n = 50 cells). Cells were infected for 24 hours before transfection of control or RNaseH-expressing plasmids for 24 hours prior to being prepared for immunofluorescence microscopy. Analyses performed using a one-way ANOVA; ns, not significant; *** p < 0.001; * p < 0.05. The data underlying this Figure can be found in . (G) Flow cytometric histograms of HeLa cells infected with control or Vpr WT LTR-mCh viruses for 24 hours prior to transient expression of RNaseH for 24 hours and quantification of LTR-mCh MFI in transfected cells via flow cytometry ( n = 3 experiments). Analyses performed using a one-way ANOVA; ns, not significant; *** p < 0.001. The data underlying this Figure can be found in . Representative gating strategies are depicted in and raw FSC files can be found in the Figshare Data repository ( https://doi.org/10.6084/m9.figshare.c.8239897 ).

Article Snippet: For inhibitor experiments, cells were treated 24-hours post-infection with either 10 nM ATM inhibitor (Fisher, #AZD1390), 10 μM ATR inhibitor (Fisher, #NU6027), 3 mM caffeine, 16 μM DNA-PK inhibitor #1 (MedChemExpress, #NU7026), or 16 μM DNA-PK inhibitor #2 (MedChemExpress #NU7441) for 24 hours.

Techniques: Immunofluorescence, Microscopy, Translocation Assay, Residue, Infection, Control, Inhibition, Recombinant, Activation Assay, Transfection, Construct, Expressing, Flow Cytometry