Human IFITM2/IFITM3 Antibody

Detection of Human IFITM2/IFITM3/Fragilis by Western Blot.

Western blot shows lysates of human brain tissue and human spleen tissue. PVDF membrane was probed with 1 µg/mL of Goat Anti-Human IFITM2/3 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4834) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF019). Specific bands were detected for IFITM2 and IFITM3 at approximately 15 and 17 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 8.

Detection of IFITM2/IFITM3 by Western Blot

Native FL IFITM3 and delta 21 IFITM3 restrict IAVs.(A) A549 cells transduced with the vector alone or with tet-inducible native FL IFITM3 or delta 21 IFITM3 were treated with the indicated concentrations of doxycycline or interferon-beta. Two days later, cells were infected by MLV-GFP pseudotyped with the indicated viral entry glycoproteins. Infected cells were harvested, fixed with formaldehyde, and analyzed by flow cytometry 48 hours after infection. The relative infectivity was determined as the percentage of GFP positive cells normalized to that of vector-transduced A549 cells. (B) The same aliquots of cells used in (A) were incubated with infectious influenza A/PR/8/34 (H1N1) virus at an M.O.I. of 1 or with influenza A/England/42/72 (H3N2) virus at an M.O.I of 0.5. Infected cells were labeled with anti-H1 or anti-H3 antibodies and with an PE-conjugated secondary antibody. Cells were analyzed by flow cytometry 16 hours after infection and the relative infectivity was determined as the percentage of PE positive cells normalized to that of vector-transduced A549 cells. (C) Experiments were similar to that in (B) except that cells were incubated with infectious influenza A/Virginia/ATCC3/2009 (H1N1) virus at an M.O.I. of 1. (D) The same aliquots of cells used in (A) or (B) were analyzed by western blotting. The expression of IFITM3 isoforms was measured using the indicated antibodies. The results are the averages of three independent infection replicates. The error bars indicate standard deviations. Each panel represents at least two sets of experiments with similar results. * indicates statistical significance (p<0.03 by Student's t test) as compared with vector-transduced cells. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/25314048), licensed under a CC-BY license. Not internally tested by R&D Systems.

Detection of IFITM2/IFITM3 by Western Blot

Epitope-tagged FL IFITM3 and delta 21 IFITM3 restrict IAVs.Naïve A549 cells and A549 cells transduced with tet-inducible c-myc-tagged (A), flag-tagged (B) FL IFITM3 or delta 21 IFITM3 were treated with or without 1000 ng/ml doxycycline (** 600 ng/ml doxycycline). Two days later, cells were infected with MLV-GFP pseudotyped with the indicated viral entry glycoproteins. Infected cells were harvested, fixed with formaldehyde, and analyzed by flow cytometry 48 hours after infection. The relative infectivity was determined as the percentage of GFP positive cells normalized to that of naïve A549 cells. (C) The same aliquots of cells used in (A) or (B) were analyzed by western blotting. The expression of IFITM3 isoforms was measured using the indicated antibodies. The expression of beta –tubulin was used as our loading controls. The results are the averages of three independent infection replicates. The error bars indicate standard deviations. Each panel represents at least two sets of experiments with similar results. * indicates statistical significance (p<0.03 by Student's t test) as compared with naïve cells. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/25314048), licensed under a CC-BY license. Not internally tested by R&D Systems.