Journal:

Article Title: Rat CRM1 Is Responsible for the Poor Activity of Human T-Cell Leukemia Virus Type 1 Rex Protein in Rat Cells

doi: 10.1128/JVI.75.23.11515-11525.2001

Figure Lengend Snippet: Effect of overexpressing rat and human CRM1 on Rex activity. (A) REF52 cells were transfected with 0.075 μg of pSRαRex along with 0.5 μg of pDM128RxRE and 0.1 μg of pCDMβ-gal in combination with various amounts of pSRαhCRM1 (⧫) or pSRαrCRM1 (▪). The CAT/β-Gal ratios of all samples were calculated. The ratio of the sample transfected with pSRαRex in the absence of either the hCRM1 or rCRM1 expression plasmid was arbitrarily set to 1. (B) CRM1 proteins produced in REF52 cells that were transfected with 0.3 μg of either rCRM1 or hCRM1 expression plasmids (lane 1, pSRα296; lane 2, pSRαhCRM1; lane 3, pSRαrCRM1) were analyzed by Western blotting as described in Materials and Methods.

Article Snippet: A mouse anti-GAL4 monoclonal antibody (Santa Cruz Biotechnology) and a rabbit anti-Rex C terminus antibody ( 24 ) were used as primary antibodies to detect GAL-fused proteins and the Rex protein, respectively.

Techniques: Activity Assay, Transfection, Expressing, Plasmid Preparation, Produced, Western Blot

Journal:

Article Title: Rat CRM1 Is Responsible for the Poor Activity of Human T-Cell Leukemia Virus Type 1 Rex Protein in Rat Cells

doi: 10.1128/JVI.75.23.11515-11525.2001

Figure Lengend Snippet: Ability of hCRM1 and rCRM1 to support Rex function in HeLa cells. (A) HeLa cells were transfected with 0.05 μg of pSRαRex, 0.5 μg of pDM128RxRE, and 0.1 μg of pCDMβ-gal together with various amounts of pSRαhCRM1 or pSRαrCRM1. At 8 h posttransfection, the medium was replaced with medium containing LMB at 0.6 or 0.8 nM. At 24 h posttransfection, the cells were subjected to CAT and β-Gal measurement. The CAT/β-Gal ratios of all samples were calculated. The ratio of the control sample transfected with pSRαRex in the absence of either hCRM1 or rCRM1 expression plasmids and in the absence of LMB was arbitrarily set to 1. The amounts of CAT and the β-Gal activity in the control sample were over 300 pg and 2.5 × 10−3 U, respectively. (B) CRM1 proteins produced in HeLa cells transfected with 0.3 μg of each CRM1 expression plasmid (lane 1, pSRα296; lane 2, pSRαhCRM1; lane 3, pSRαrCRM1) were analyzed by Western blotting.

Article Snippet: A mouse anti-GAL4 monoclonal antibody (Santa Cruz Biotechnology) and a rabbit anti-Rex C terminus antibody ( 24 ) were used as primary antibodies to detect GAL-fused proteins and the Rex protein, respectively.

Techniques: Transfection, Expressing, Activity Assay, Produced, Plasmid Preparation, Western Blot

Journal:

Article Title: Rat CRM1 Is Responsible for the Poor Activity of Human T-Cell Leukemia Virus Type 1 Rex Protein in Rat Cells

doi: 10.1128/JVI.75.23.11515-11525.2001

Figure Lengend Snippet: Interaction of Rex with either hCRM1 or rCRM1. (A) REF52 cells were transfected with the plasmid expressing either GAL-hCRM1 or GAL-rCRM1 in combination with pRexVP, pG5BLuc, and pCDMβ-gal. The Luc/β-Gal ratios of all samples were calculated. GAL-, plasmid expressing only the GAL4 region, which was used as a negative control. (B) Western blot of GAL-hCRM1 and GAL-rCRM1 proteins synthesized in transfected REF52 cells. (C) Pull-down assay using recombinant Rex protein. Purified His-Rex(g10) proteins immobilized on chelating Sepharose were incubated with HeLa or REF52 cell extract in the absence (lanes 2 and 4) or presence (lanes 3 and 5) of GTP-charged recombinant RanQ69L protein. The sample of lane 1 contained neither cell lysate nor recombinant RanQ69L proteins during incubation. The volume of the cell extract subjected to the binding reaction was nine times of that of the input fraction.

Article Snippet: A mouse anti-GAL4 monoclonal antibody (Santa Cruz Biotechnology) and a rabbit anti-Rex C terminus antibody ( 24 ) were used as primary antibodies to detect GAL-fused proteins and the Rex protein, respectively.

Techniques: Transfection, Plasmid Preparation, Expressing, Negative Control, Western Blot, Synthesized, Pull Down Assay, Recombinant, Purification, Incubation, Binding Assay

Journal:

Article Title: Rat CRM1 Is Responsible for the Poor Activity of Human T-Cell Leukemia Virus Type 1 Rex Protein in Rat Cells

doi: 10.1128/JVI.75.23.11515-11525.2001

Figure Lengend Snippet: Rex-Rex dimerization analyzed by the coimmunoprecipitation method. HeLa and REF52 cells were transfected with the plasmids which express GAL-Rex and Rex-VP or their derivatives as indicated. At 48 h posttransfection, the cells were harvested and the supernatants were incubated with anti-VP antibodies immobilized on protein-G Sepharose in the presence of GTP-charged recombinant RanQ69L. The recombinant hCRM1 protein was added to the sample, which was derived from the REF52 cells transfected with GAL-Rex and Rex-VP (lane 6) during incubation. The volume of the cell extract subjected to the coimmunoprecipitation reaction was nine times of that of input fraction. Rabbit anti-Rex C terminus antibodies were used for Western blotting.

Article Snippet: A mouse anti-GAL4 monoclonal antibody (Santa Cruz Biotechnology) and a rabbit anti-Rex C terminus antibody ( 24 ) were used as primary antibodies to detect GAL-fused proteins and the Rex protein, respectively.

Techniques: Transfection, Incubation, Recombinant, Derivative Assay, Western Blot

Journal: Plant Physiology

Article Title: ABI5-BINDING PROTEIN2 Coordinates CONSTANS to Delay Flowering by Recruiting the Transcriptional Corepressor TPR2 ¹

doi: 10.1104/pp.18.00865

Figure Lengend Snippet: AFP2 reinforces CO and TPR2 to coordinate flowering time. A, Y3H analysis to detect the formation of the CO-AFP2-TPR2 complex. Yeast cotransformed with these three constructs could grow well on the nonselective medium lacking Leu, Trp, and uracil (−L/−W/−U), but only yeast harboring constructs that had positive interactions were able to grow on restrictive growth medium supplemented with 10 mm 3-aminotriazole plus 2% (w/v) Gal and lacking His/Leu/Trp/Ura (−H/−L/−W/−U). B, In vitro pull-down analysis of the interactions among CO, AFP2, and TPR2. Recombinant GST-TPR2 and MBP-CO proteins were produced in E. coli. After cell lysis, cell extracts of GST-TPR2 and MBP-CO were mixed with HIS-AFP2, HIS-AFP∆E, or HIS-AFP2∆J, respectively, and then incubated with magnetic anti-His-coupled magnetic beads. His-tagged full-length or truncated AFP2 was precipitated and washed using a magnetic stand, eluted by boiling in SDS loading buffer, and separated by SDS-PAGE. GST-TPR2 and MBP-CO were detected by immunoblotting. C, Co-IP analysis of the CO-AFP2-TPR2 complex in vivo. The CO-HA/afp2 transgenic line was crossed with AFP-ox/afp2 to obtain CO-HA/AFP2-ox/afp2, which was subjected to Co-IP analysis. Total proteins were extracted from CO-HA/AFP2-ox/afp2 and immunoprecipitated with anti-Flag agarose beads, and the immunoprecipitated proteins were detected with anti-TPR2 antibody. D, Flowering phenotype of the afp2 mutant and the indicated transgenic lines in the afp2 mutant background. The photos were taken at 18 d after seeds germination. Bar = 3 cm. E, Flowering times based on the total rosette leaf number under LD conditions. Data are means ± sd of three biological replicates. For each line, 20 plants were observed. Bars with different letters are significantly different at P < 0.05 (Tukey’s test). F, RT-qPCR analysis of CO transcript levels in the afp2 mutant and different transgenic lines in the afp2 background. IPP2 was used as an internal control. Data are means ± sd of three biological replicates. Bars with different letters are significantly different at P < 0.05 (Tukey’s test). 3AT, 3-aminotriazole.

Article Snippet: The pulled-down proteins were extensively washed with buffer (50 m m Tris-HCl, pH 7.4, 100 m m NaCl, and 0.6% [v/v] Triton X-100) before the samples were resolved on 8% (w/v) SDS-PAGE gels and analyzed by protein gel blot analysis using anti-MBP (1:5000, New England Biolabs), anti-HIS (1:300, Qiagen), and anti-GST (1:3000, Invitrogen), followed by a mouse secondary antibody (1:5000, Promega) and the ECL system (Invitrogen).

Techniques: Construct, In Vitro, Recombinant, Produced, Lysis, Incubation, Magnetic Beads, SDS Page, Western Blot, Co-Immunoprecipitation Assay, In Vivo, Transgenic Assay, Immunoprecipitation, Mutagenesis, Quantitative RT-PCR

Journal: bioRxiv

Article Title: Selective Immune Silencing by Targeted TGF-β Agonists

doi: 10.64898/2026.01.19.700410

Figure Lengend Snippet: Design and characterization of mouse T cell-targeted TGF- β agonists. a. Schematic of the plasmid construct encoding the MSA–TGM1-targeting-arm fusion protein. b. SDS–PAGE analysis showing the molecular weight and purity of the indicated recombinant proteins. c. SDS–PAGE analysis showing the molecular weight and purity of the indicated recombinant proteins. d. Representative flow cytometry plots showing mouse CD4 and CD8α expression in mouse CD4- or CD8α-transduced HEK293 cells. e. Dose-dependent curves showing GITR, IRF4, and T-bet expression levels in in vitro –cultured CD4 T cells treated with the indicated proteins on day 3. f. Dose-dependent curves showing GITR, IRF4, and T-bet expression levels in in vitro –cultured CD8 T cells treated with the indicated proteins on day 3. g. Dose-dependent curves showing percentages of IFN-γ– and TNF-α–producing cells among in vitro –cultured CD4 T cells treated with the indicated proteins on day 3. h. Dose-dependent curves showing percentages of IFN-γ– and TNF-α–producing cells among in vitro –cultured CD8 T cells treated with the indicated proteins on day 3. i. Dose-dependent curves showing Foxp3 cell percentages in in vitro -cultured CD4 T cells, and Granzyme B–producing cell percentages in in vitro -cultured CD8 T cells treated with the indicated proteins on day 3. Data are presented as mean ± s.e.m.

Article Snippet: The following antibodies were purchased from Miltenyi Biotec: human IgA (130-113-480) and IRF4 (130-100-909).

Techniques: Plasmid Preparation, Construct, SDS Page, Molecular Weight, Recombinant, Flow Cytometry, Expressing, In Vitro, Cell Culture

Journal: bioRxiv

Article Title: Selective Immune Silencing by Targeted TGF-β Agonists

doi: 10.64898/2026.01.19.700410

Figure Lengend Snippet: a. Frequencies of immune cell subsets. b. SCENIC prediction of IRF4 and Blimp1 transcription factor activity. c. Immunoglobulin gene expression. d. UMAP plots showing cell cycle gene signature scores. e. Quantification of cell cycle gene signature scores. f. Scaled signature scores for TGF-β–inducible genes, senescence genes, and apoptosis-related genes, aggregated by sample.

Article Snippet: The following antibodies were purchased from Miltenyi Biotec: human IgA (130-113-480) and IRF4 (130-100-909).

Techniques: Activity Assay, Gene Expression

Journal: Bioengineering

Article Title: RNU ( Foxn1 RNU -Nude) Rats Demonstrate an Improved Ability to Regenerate Muscle in a Volumetric Muscle Injury Compared to Sprague Dawley Rats

doi: 10.3390/bioengineering8010012

Figure Lengend Snippet: CD68+ staining is increased in RNU DMM-treated sites compared to Sprague Dawley. CD68 staining was quantified and showed increased levels in RNU rats ( A ). Yet, CD163 ( B ) and FoxP3 ( C ) were unaltered. CD4 staining was increased in RNU rats ( D ) while CD8 staining was lower ( E ). In addition, CD4, CD8, and FoxP3 levels were low. DRAQ5 showed no change in DNA staining ( F ). Data shown are means ± SEM of 8 animals. Letters not shared indicated a significant difference ( p < 0.05, Tukey).

Article Snippet: Primary antibodies used in this experiment were: mouse anti-Pax7 (ab55494, Abcam, Cambridge, UK); rabbit anti-nicotinic acetylcholine receptor-epsilon (AChR-ε, ab65180, Abcam); mouse anti-nicotinic acetylcholine receptor-gamma (AChR-γ, MA3-043, Thermo Fisher Scientific, Waltham, MA, USA); mouse anti-myosin heavy chain-fetal (fMyHC, SC-53097, Santa Cruz Biotechnology); CD68 (ab125212, Abcam); CD163 (ab87099, Abcam); CD8 (MAB116, R&D Systems), CD4 (MAB554, R&D Systems), FoxP3 (MAB8214, R&D Systems) and were diluted in PBS with 1% BSA and 0.3% Tween-20.

Techniques: Staining

Journal: Immunity

Article Title: Signaling through the inhibitory Fc receptor FcγRIIB induces CD8 T cell apoptosis to limit T cell immunity

doi: 10.1016/j.immuni.2019.12.006

Figure Lengend Snippet: KEY RESOURCES TABLE

Article Snippet: Dr. Mark Cragg InVivoMAb anti-mouse CD16/32 (clone 2.4G2) BioXcell Cat# BE0307, RRID:AB_2736987 Bacterial and Virus Strains Biological Samples Emory Transplant Center Biorepository Emory IRB protocol #00046593 Chemicals, Peptides, and Recombinant Proteins GolgiPlug BD Biosciences Cat# 555029 OVA peptide 257–264 (SIINFEKL) GenScript Cat# RP10611 CTLA-4Ig (abatacept) Bristol-Myers Squibb, Abatacept (Orencia) Anti-CD28 domain antibodies Bristol-Myers Squibb Collagenase (type 1A) Sigma-Aldrich C2654 Hyaluronidase (type 1) Sigma-Aldrich H3506 Collagenase P Sigma-Aldrich Ref# 11213865001 Collagenase D Sigma-Aldrich Ref# 1088866001 Recombinant Fgl2 R&D Systems R&D Cat# 5257-FL-050 Critical Commercial Assays MACS CD8a+ T cell isolation kit, mouse Miltenyi Biotec 130-104-075 Quick-RNA MicroPrep Kit Zyma Research R1051 SMART-seq v4 cDNA synthesis kit Takara Cat# 634894 NexteraXT kit Illumina FC-131–1096 Mouse Fgl2 ELISA Biolegend Biolegend Cat# 437807 RNeasy Plus Micro Kit Qiagen Qiagen Cat# 74034 High Capacity cDNA reverse transcription kit ThermoFisher ThermoFisher Cat# 4368814 HT HG-U133 Plus PM BeadChip Affymetrix Thermo Fisher Cat# 901261 Lightning Link R-PE Antibody Labeling kit Novus Biologicals Cat # 703–0010 CountBright Beads Life Technologies Cat # C36950 Deposited Data RNAseq data NCBI Gene Expression Omnibus (GEO) GSE118439 Experimental Models: Cell Lines B16 Melanoma-OVA Brown, et al., 2001 , provided by Dr. Yang-Xin Fu Experimental Models: Organisms/Strains NCI C57Bl/6Ncr (NCI grantee program) Charles River Stock #556 NCI B6-LY5.1/Cr (NCI grantee program) Charles River Stock #564 OT-I Hogquist et al., 1994 OT-II Barnden et al., 1998 mOVA (C57Bl/6 background, H-2b) Ehst et al., 2013 Dr. Marc Jenkins B6.129P2-Aicda tm1(cre)Mnz /J ( Aicda −/− ) The Jackson Laboratory Stock #007770 B6;129S-Fcgr2btm1Ttk/J ( Fcgr2b −/− ) The Jackson Laboratory Stock #002848 EM:06078 Fcgr2b Fcgr2bB6null B6(Cg)-Fcgr2btm12Sjv/Cnbc ( Fcgr2b −/− ) European Mutant Mouse Archive; Dr. J.S.

Techniques: Control, Virus, Recombinant, Cell Isolation, cDNA Synthesis, Enzyme-linked Immunosorbent Assay, Reverse Transcription, Antibody Labeling, Gene Expression, Mutagenesis, Software