rabbit anti-cd36 polyclonal antibody  (Novus Biologicals)

Journal: PLOS Pathogens

Article Title: Retinol binding protein 4 enhances cellular cholesterol uptake to facilitate influenza A virus infection

doi: 10.1371/journal.ppat.1013623

Figure Lengend Snippet: (A, B) Quantification of total cholesterol levels in multiple WT and RBP4-deficient cell types (A) and in serum from WT and RBP4-deficient mice (B). (C) Heatmap representation of RNA sequencing analysis showing differentially expressed genes related to cholesterol metabolism in WT and RBP4-deficient BMDMs. (D, E) qPCR analysis of CD36 mRNA expression in WT and RBP4-deficient BMDMs (D, left) and HEK293T cells (D, right), or in lung tissues from WT and RBP4-deficient mice (E). (F, G) Immunoblotting analysis of CD36 protein levels in multiple WT and RBP4-decficent cells as indicated (F) or in lung tissues from WT and RBP4-deficient mice (G). (H to J) Immunoblotting analysis of protein levels of CD36, total JNK, phosphorylated (p)-JNK, STAT1, and p-STAT1 as indicated in PK-15 or 3D4/21 cells pretreated with SP600125 (SP, 10 μM) or Resatorvid (TAK, 1 μM) for 2 hours, followed by treatment with rpRBP4 for 24 hours. (K) Immunoblotting analysis of protein expression of CD36, NP and M1 in PK-15 cells treated as described in (H), followed by infection with IAV WSN strain (MOI = 0.1) for 24 hours. (L) Immunoblotting analysis of CD36, p-STAT1, total STAT1 and RBP4 protein levels in HEK293T cells transfected with RBP4 expression plasmid or control empty vector, followed by treatment with Ruxolitinib (Ruxo, 5 μM) for 2 hours. (M) Immunoblotting analysis of CD36, p-STAT1, STAT1, STRA6 and RBP4 protein levels in HEK293T cells co-transfected with RBP4 expression plasmid and siRNA for STRA6 or negative control for 36 hours. (N) Immunoblotting analysis of CD36, p-JAK2, JAK2, p-STAT1, STAT1 and RBP4 protein levels in HEK293T cells transfected with RBP4 expression plasmid or control empty vector, followed by treatment with Ruxo (5 μM) for 2 hours or transfected with siRNA for STRA6 or negative control for 36 hours. Data are pooled from three independent experiments (A, B, D, E, mean ± SD) or representative of two independent experiments (F-N). * p < 0.05, ** p < 0.01 (Student’s t -tes t ).

Article Snippet: The primary antibodies used in this study were sourced from commercial suppliers as follows: Rabbit polyclonal antibodies against RBP4 (1 : 2,000, 11774–1-AP), CD36 (1 : 2,000, 18836–1-AP), STRA6 (1 : 3,000, 22001–1-AP), p65 (1 : 1,000, 10745–1-AP) and β-actin (1 : 20,000, 66009–1-lg) were purchased from Proteintech Group Inc. Rabbit polyclonal antibodies against CD36 (1 : 1,000, CY5796) and FLAG (1 : 10,000, AB0030) were purchased from Abways.

Techniques: RNA Sequencing, Expressing, Western Blot, Infection, Transfection, Plasmid Preparation, Control, Negative Control

Journal: PLOS Pathogens

Article Title: Retinol binding protein 4 enhances cellular cholesterol uptake to facilitate influenza A virus infection

doi: 10.1371/journal.ppat.1013623

Figure Lengend Snippet: (A to D) Confocal microscopy (A and B) or flow cytometry (C and D) analysis of cholesterol uptake by Dil-OxLDL in WT and RBP4-deficient HEK293T cells or BMDMs. Scale bars, 100 μm. Statistics of mean fluorescence intensity was calculated by Image J software (A and B, right) or Flow Jo software (C and D, right). (E, F) Flow cytometry analysis of cholesterol uptake by Dil-OxLDL in WT, RBP4-deficient and CD36 overexpressing RBP4-deficient HEK293T cells (E) and BMDMs (F). Mean fluorescence intensities were quantified with Flow Jo software. (G, H) Flow cytometry analysis of SA expression in HEK293T cells (G, upper) transfected with hCD36 plasmid or in stable CD36-overexpressing iBMDMs (H, upper). Cells were left untreated or incubated with cholesterol for 1 hour at 37°C, followed by staining with SNA or MAL. Mean fluorescence intensities were quantified by Flow Jo software (lower panels). (I) Confocal microscopy analysis of SA expression and distribution in WT and CD36-overexpressing iBMDMs. Cells were left untreated or incubated with cholesterol for 1 hour at 37°C, followed by staining with SNA or MAL (green). Cell membranes were stained with Dil dye (red), and nuclei were counterstained with DAPI (blue). Data are representative (A-F, left, G, H, upper and I) or pooled from at least three independent experiments (A-F, right, G and H, lower, mean ± SD). * p < 0.05, ** p < 0.01, *** p < 0.001 (Student’s t -test).

Article Snippet: The primary antibodies used in this study were sourced from commercial suppliers as follows: Rabbit polyclonal antibodies against RBP4 (1 : 2,000, 11774–1-AP), CD36 (1 : 2,000, 18836–1-AP), STRA6 (1 : 3,000, 22001–1-AP), p65 (1 : 1,000, 10745–1-AP) and β-actin (1 : 20,000, 66009–1-lg) were purchased from Proteintech Group Inc. Rabbit polyclonal antibodies against CD36 (1 : 1,000, CY5796) and FLAG (1 : 10,000, AB0030) were purchased from Abways.

Techniques: Confocal Microscopy, Flow Cytometry, Fluorescence, Software, Expressing, Transfection, Plasmid Preparation, Incubation, Staining

Journal: PLOS Pathogens

Article Title: Retinol binding protein 4 enhances cellular cholesterol uptake to facilitate influenza A virus infection

doi: 10.1371/journal.ppat.1013623

Figure Lengend Snippet: (A, B) Flow cytometry analysis of α-2,3-linked SA or α-2,6-linked SA in WT, RBP4-deficient and CD36 overexpressing RBP4-deficient HEK293T cells, as wells as murine BMDMs transduced with CD36 retrovirus. Mean fluorescence intensities were quantified with FlowJo software. (C, D) qPCR analysis of vRNA levels of the NP gene or NP and M1 mRNA expression in HEK293T cells (C) or BMDMs (D) infected with IAV WSN strain (MOI = 5) during the viral attachment stage. (E) Flow cytometry analysis of α-2,3-linked SA or α-2,6-linked SA in WT and stable CD36-overexpressing iBMDMs cultured in serum-free medium. Cells were cultured with serum-free medium for 6 hours and subsequently stained with Lectins. Mean fluorescence intensities were quantified with FlowJo software. Data are pooled from three independent experiments (A-E, mean ± SD). * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001 (Student’s t -test).

Article Snippet: The primary antibodies used in this study were sourced from commercial suppliers as follows: Rabbit polyclonal antibodies against RBP4 (1 : 2,000, 11774–1-AP), CD36 (1 : 2,000, 18836–1-AP), STRA6 (1 : 3,000, 22001–1-AP), p65 (1 : 1,000, 10745–1-AP) and β-actin (1 : 20,000, 66009–1-lg) were purchased from Proteintech Group Inc. Rabbit polyclonal antibodies against CD36 (1 : 1,000, CY5796) and FLAG (1 : 10,000, AB0030) were purchased from Abways.

Techniques: Flow Cytometry, Transduction, Fluorescence, Software, Expressing, Infection, Cell Culture, Staining

Journal: PLOS Pathogens

Article Title: Retinol binding protein 4 enhances cellular cholesterol uptake to facilitate influenza A virus infection

doi: 10.1371/journal.ppat.1013623

Figure Lengend Snippet: (A) Experimental scheme for lentiviral transduction and influenza virus infection in mice. WT and RBP4-deficient mice were intravenously injected with lentivirus (10 9 PFU in 200 μL per mouse) followed by infection with 10 4 PFU of IAV (WSN strain) 5 days later. Lungs were collected 3 days post-IAV infection. (B) qPCR analysis of CD36 mRNA levels in lung tissues from WT, RBP4-deficient, and CD36-overexpressing RBP4-deficient mice as treated in (A). (C) Body weight changes of indicated mouse genotypes at day 3 post-IAV infection. (D) Plaque assay analysis of virus titer in lung tissues from mice described in (A). (E, F) Immunofluorescence images (E, left) and quantitative analysis of NP protein intensity (E, right) or immunoblotting analysis of M1, NP and CD36 protein expression (F) in lung tissues from the mice described in (A). Mean fluorescence intensity was determined by Image J software (E, right). Scale bars, 100 μm. (G, H) Representative H&E-stained lung sections (G) and corresponding histopathological scores (H) from indicated groups. Each dot in (B-D, H) represents an individual mouse. (I) Proposed model of RBP4-mediated promotion of influenza virus infection. Created in BioRender. Huang, L. (2025) https://BioRender.com/rll2ll1 . Data are representative of two independent experiments (E-G). * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001 (Student’s t -test).

Article Snippet: The primary antibodies used in this study were sourced from commercial suppliers as follows: Rabbit polyclonal antibodies against RBP4 (1 : 2,000, 11774–1-AP), CD36 (1 : 2,000, 18836–1-AP), STRA6 (1 : 3,000, 22001–1-AP), p65 (1 : 1,000, 10745–1-AP) and β-actin (1 : 20,000, 66009–1-lg) were purchased from Proteintech Group Inc. Rabbit polyclonal antibodies against CD36 (1 : 1,000, CY5796) and FLAG (1 : 10,000, AB0030) were purchased from Abways.

Techniques: Transduction, Virus, Infection, Injection, Plaque Assay, Immunofluorescence, Western Blot, Expressing, Fluorescence, Software, Staining

Journal: ImmunoHorizons

Article Title: PTEN inhibits scavenger receptor–mediated phagocytosis of methicillin-resistant Staphylococcus aureus

doi: 10.1093/immhor/vlaf011

Figure Lengend Snippet: PTEN inhibits SR expression and actions. (A) Cas9 Control and PTEN KO iBMDMs were challenged with HK-MRSA (MOI 10:1; 18 h). RNA isolation, cDNA preparation, and gene expression analysis were conducted as outlined in Materials and methods. Data are presented as geometric mean and log 10 normalized. The data represent n = 3 independent experiments. * P < 0.05 and **** P < 0.0001 by unpaired t test. (B) Cas9 Control and PTEN KO iBMDMs were infected with GFP-MRSA and stained for CD36 and MARCO using flow cytometry as described in Materials and methods. The data represent n = 3 independent experiments. * P < 0.05 and ** P < 0.01 by one-way ANOVA with Bonferroni multiple comparisons. (C) Cas9 Control and PTEN KO iBMDMs were plated at 7.5 × 10 5 cells/well. Macrophages were pretreated with the indicated inhibitor for 45 min prior to infection with GFP-MRSA (MOI 50:1), and fluorescent readings were obtained at 485 nm. Data are displayed as geometric mean. The dashed line indicates normalization to 100%. The data represent n = 6 independent experiments. * P < 0.05 by unpaired t test. (D and E) Cas9 Control iBMDMs were plated on chamber slides at 5.0 × 105 cells/well and incubated overnight. Slides were challenged with HK-MRSA (MOI 50:1; 30 min). The slides were imaged at 60× with oil immersion using a Nikon Spinning Disk confocal microscope. (D) PLA of PTEN/MARCO specks for naïve (top) or challenged (middle) iBMDMs. Quantification of PLA specks per cell (bottom). (E) PLA of PTEN/CD36 specks for naïve (top) or challenged (middle) iBMDMs. Quantification of PLA specks per cell (bottom). PLA specks are shown in red, nuclei are shown in blue, and F-actin is shown in green. Data are presented as geometric mean. This data represents 1 of 2 independent experiments. *** P < 0.001 by Mann–Whitney t test. Red specks outside of actin filaments are nonspecific staining and are not included in the quantification of specks per cell. (F) Cas9 Control and PTEN KO iBMDMs were challenged with 100 µg/mL S. aureus pHrodo red for 30 min. Slides were stained with anti-rCD36 as described in Materials and methods. The slides were imaged at 60× with oil immersion using a Nikon Spinning Disk confocal microscope. The orange line denotes the colocalization of S. aureus pHrodo and CD36. Quantification of the colocalization of CD36 and pHrodo rosettes per cell. Images represent one independent experiment with n = 3 mice/group. ** P < 0.01 by Mann–Whitney test.

Article Snippet: To stain for CD36, cells were fixed and permeabilized as above and blocked with 1× PBS/5% normal goat serum/0.3% Triton X-100 for 1 h. Anti-rabbit CD36 (Cell Signaling, clone E8B7S, #28109S—100μL) was diluted to 1:3200 in 1× PBS/1% BSA/0.3% Triton X-100 and incubated overnight at 4 °C.

Techniques: Expressing, Control, Isolation, Gene Expression, Infection, Staining, Flow Cytometry, Incubation, Microscopy, MANN-WHITNEY