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Addgene inc described25
Described25, supplied by Addgene inc, used in various techniques. Bioz Stars score: 93/100, based on 7 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/pcdna3+sace2v2+4/pcDNA3-sACE2v2%2E4(732)-IgG1+(Plasmid+%23154106)/pm39185275-225-7-11
Average 93 stars, based on 7 article reviews

described25 - by Bioz Stars, 2026-09

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Article Title: Engineered ACE2 decoy mitigates lung injury and death induced by SARS-CoV-2 variants.
Article Snippet: .. Plasmids for the expression of myc-tagged human ACE2 (pCEP4myc-ACE2, plasmid no. 141185; Addgene), 8 histidine-tagged monomeric sACE2 (ACE2 amino acids 1–615; pcDNA3-sACE2(WT)-8his, plasmid no. 149268 and pcDNA3-sACE2v2.4-8his, plasmid no. 149664; Addgene), SARS-CoV-1 S protein with C-terminal C9 tag (pcDNA3.1-SARS-spike, plasmid no. 145031; Addgene), 8his-tagged RBD (pcDNA3-SARS-CoV-2-S-RBD-8his, plasmid no. 145145; Addgene) and human IgG1-Fc fused dimeric sACE22 (ACE2 amino acids 1–732; pcDNA3-sACE2-WT(732)-IgG1, plasmid no. 154104 and pcDNA3sACE2v2.4(732)-IgG1, plasmid no. 154106; Addgene) have been described previously. ..

Article Title: Engineered ACE2 decoy mitigates lung injury and death induced by SARS-CoV-2 variants
Article Snippet: .. Plasmids for the expression of myc-tagged human ACE2 (pCEP4-myc-ACE2, plasmid no. 141185; Addgene), 8 histidine-tagged monomeric sACE2 (ACE2 amino acids 1–615; pcDNA3-sACE2(WT)-8his, plasmid no. 149268 and pcDNA3-sACE2v2.4-8his, plasmid no. 149664; Addgene), SARS-CoV-1 S protein with C-terminal C9 tag (pcDNA3.1-SARS-spike, plasmid no. 145031; Addgene), 8his-tagged RBD (pcDNA3-SARS-CoV-2-S-RBD-8his, plasmid no. 145145; Addgene) and human IgG1-Fc fused dimeric sACE2 2 (ACE2 amino acids 1–732; pcDNA3-sACE2-WT(732)-IgG1, plasmid no. 154104 and pcDNA3-sACE2v2.4(732)-IgG1, plasmid no. 154106; Addgene) have been described previously. ..

Article Title: Engineered High-Affinity ACE2 Peptide Mitigates ARDS and Death Induced by Multiple SARS-CoV-2 Variants
Article Snippet: .. Plasmids for the expression of myc-tagged human ACE2 (pCEP4-myc-ACE2, Addgene No. 141185), 8his-tagged monomeric sACE2 (ACE2 a.a. 1-615; pcDNA3-sACE2(WT)-8his, Addgene No. 149268, and pcDNA3-sACE2v2.4-8his, Addgene No. 149664), and human IgG1-Fc fused dimeric sACE2 2 (ACE2 a.a. 1-732; pcDNA3-sACE2-WT(732)-IgG1, Addgene No. 154104, and pcDNA3-sACE2v2.4(732)-IgG1, Addgene No. 154106) are previously described. .. Human codon-optimized S (GenBank No. YP_009724390.1) was subcloned into pCEP4 (Invitrogen) from pUC57-2019-nCoV-S(Human) (distributed by Molecular Cloud on behalf of Haisheng Yu, Chinese Academy of Medical Sciences) with a N-terminal HA leader (MKTIIALSYIFCLVFA), myc-tag (EQKLISEEDL), and linker (GSPGGA) upstream of the mature polypeptide (a.a. V16-T1273).

Article Title: Engineered High-Affinity ACE2 Peptide Mitigates ARDS and Death Induced by Multiple SARS-CoV-2 Variants
Article Snippet: .. Plasmids for the expression of myc-tagged human ACE2 (pCEP4-myc-ACE2, Addgene No. 141185), 8his-tagged monomeric sACE2 (ACE2 a.a. 1–615; pcDNA3-sACE2(WT)-8his, Addgene No. 149268, and pcDNA3-sACE2v2.4–8his, Addgene No. 149664), and human IgG1-Fc fused dimeric sACE2 2 (ACE2 a.a. 1–732; pcDNA3-sACE2-WT(732)-IgG1, Addgene No. 154104, and pcDNA3-sACE2v2.4(732)-IgG1, Addgene No. 154106) are previously described. .. Human codon-optimized S (GenBank No. YP_009724390.1 ) was subcloned into pCEP4 (Invitrogen) from pUC57–2019-nCoV-S(Human) (distributed by Molecular Cloud on behalf of Haisheng Yu, Chinese Academy of Medical Sciences) with a N-terminal HA leader (MKTIIALSYIFCLVFA), myc-tag (EQKLISEEDL), and linker (GSPGGA) upstream of the mature polypeptide (a.a. V16-T1273).

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Choice of cell line for sACE2 2 .v2.4-IgG1 production impacts pharmacokinetics and glycosylation (A and B) sACE2 2 .v2.4-IgG1 was expressed and purified from human Expi293F (gray) or nonhuman ExpiCHO-S (black) cultures that were both transiently transfected. A 10 mg/kg amount of sACE2 2 .v2.4-IgG1 was injected into the tail vein of human FcRn transgenic mice. (A) ACE2 catalytic activity and (B) protein concentrations based on ELISA were measured in plasma. Data are mean ± SEM, n = 3 mice per time point. (C) N-glycan types from glycomics analysis of sACE2 2 .v2.4-IgG1 produced in ExpiCHO-S vs. Expi293F cells. (D) Abundance of sialylated (Neu5Ac) and fucosylated N-glycan structures. (E and F) O-Glycan analysis of sACE2 2 .v2.4-IgG1 produced in (E) ExpiCHO-S and (F) Expi293F cells. After PNGaseF treatment of protein, O-glycans were released, purified, permethylated, and analyzed by MALDI-TOF-MS. O-glycan structures were assigned using Glycoworkbench software based on precursor masses and the common mammalian biosynthetic pathway. Glycan structures are indicated on the x axis by their m/z ratio. GlcNAc, blue squares; GalNAc, yellow squares; Gal, yellow circles; Neu5Ac, purple diamonds.

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: Choice of cell line for sACE2 2 .v2.4-IgG1 production impacts pharmacokinetics and glycosylation (A and B) sACE2 2 .v2.4-IgG1 was expressed and purified from human Expi293F (gray) or nonhuman ExpiCHO-S (black) cultures that were both transiently transfected. A 10 mg/kg amount of sACE2 2 .v2.4-IgG1 was injected into the tail vein of human FcRn transgenic mice. (A) ACE2 catalytic activity and (B) protein concentrations based on ELISA were measured in plasma. Data are mean ± SEM, n = 3 mice per time point. (C) N-glycan types from glycomics analysis of sACE2 2 .v2.4-IgG1 produced in ExpiCHO-S vs. Expi293F cells. (D) Abundance of sialylated (Neu5Ac) and fucosylated N-glycan structures. (E and F) O-Glycan analysis of sACE2 2 .v2.4-IgG1 produced in (E) ExpiCHO-S and (F) Expi293F cells. After PNGaseF treatment of protein, O-glycans were released, purified, permethylated, and analyzed by MALDI-TOF-MS. O-glycan structures were assigned using Glycoworkbench software based on precursor masses and the common mammalian biosynthetic pathway. Glycan structures are indicated on the x axis by their m/z ratio. GlcNAc, blue squares; GalNAc, yellow squares; Gal, yellow circles; Neu5Ac, purple diamonds.

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Drug discovery, Glycoproteomics, Purification, Transfection, Injection, Transgenic Assay, Activity Assay, Enzyme-linked Immunosorbent Assay, Clinical Proteomics, Produced, Software

An engineered derivative of sACE2 2 .v2.4-IgG1 and its glycosylation (A) Left, the structure (PDB: 6M17 ) of dimeric ACE2 (chains “A” and “B” in dark and light green) bound to RBD (gray ribbons). Glycans are shown as orange sticks. PD, protease domain; CLD, collectrin-like dimerization domain. Center and right, residues mutated to fill cavities (blue spheres), introduce disulfides (yellow spheres), or add N-glycosylation motifs (purple spheres) are shown on a single ACE2 subunit. Lead candidate sACE2 2 .S19-IgG1 has mutations V491I, M662T, N720S. (B) N-glycan types on sACE2 2 .S19-IgG1 produced in Expi293F cells. (C) Abundance of sialylated and fucosylated N-glycan structures on sACE2 2 .S19-IgG1 produced in Expi293F cells. (D) O-Glycan structures on sACE2 2 .S19-IgG1 produced in Expi293F cells following O-glycan release and MALDI-TOF-MS analysis. (E) Occupancy of the N-glycosylation sites based on glycopeptidomics analysis of sACE2 2 .S19-IgG1 from Expi293F (green), sACE2 2 .v2.4-IgG1 from Expi293F (pale gray), and sACE2 2 .v2.4-IgG1 from ExpiCHO-S (dark gray). sACE2 2 .S19-IgG1 has added glycosylation sites at positions 660 and 718. (F) Percent of the glycoforms at each N-glycosylation site that have at least one sialic acid.

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: An engineered derivative of sACE2 2 .v2.4-IgG1 and its glycosylation (A) Left, the structure (PDB: 6M17 ) of dimeric ACE2 (chains “A” and “B” in dark and light green) bound to RBD (gray ribbons). Glycans are shown as orange sticks. PD, protease domain; CLD, collectrin-like dimerization domain. Center and right, residues mutated to fill cavities (blue spheres), introduce disulfides (yellow spheres), or add N-glycosylation motifs (purple spheres) are shown on a single ACE2 subunit. Lead candidate sACE2 2 .S19-IgG1 has mutations V491I, M662T, N720S. (B) N-glycan types on sACE2 2 .S19-IgG1 produced in Expi293F cells. (C) Abundance of sialylated and fucosylated N-glycan structures on sACE2 2 .S19-IgG1 produced in Expi293F cells. (D) O-Glycan structures on sACE2 2 .S19-IgG1 produced in Expi293F cells following O-glycan release and MALDI-TOF-MS analysis. (E) Occupancy of the N-glycosylation sites based on glycopeptidomics analysis of sACE2 2 .S19-IgG1 from Expi293F (green), sACE2 2 .v2.4-IgG1 from Expi293F (pale gray), and sACE2 2 .v2.4-IgG1 from ExpiCHO-S (dark gray). sACE2 2 .S19-IgG1 has added glycosylation sites at positions 660 and 718. (F) Percent of the glycoforms at each N-glycosylation site that have at least one sialic acid.

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Glycoproteomics, Introduce, Produced

BLI kinetics for monovalent binding of decoy receptors to Spike RBD

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: BLI kinetics for monovalent binding of decoy receptors to Spike RBD

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Binding Assay, Mutagenesis

High sialylation and YTE mutations in the Fc region enhance the pharmacokinetics of sACE2 2 .S19-IgG1 (A) Intravenous administration of proteins at 10 mg/kg into human FcRn mice. Blood was collected into heparin via retroorbital route at the plotted time points. Plasma levels of the indicated proteins were measured by ELISA. (B and C) Proteins were injected s.c. in the flank of human FcRn mice at a dose of 10 mg/kg (solid lines) or 100 mg/kg (broken line). (B) ACE2 catalytic activity in plasma and (C) protein concentrations based on ELISA. (D) sACE2 2 .S19-IgG1(YTE) was treated with PNGase F or neuraminidase. Proteins (20 μg) were analyzed without further purification by SDS-PAGE under non-reducing conditions and stained with Coomassie. The calculated molecular weight (MW) of the mature polypeptide (excluding glycans) is 218 kD for the dimer. PNGase F has an MW of 36 kD. A. ureafaciens neuraminidase is a mixture of isoenzymes. (E) Proteins (10 μg) were analyzed by IEF gel electrophoresis. Glycosidase-treated proteins were analyzed without (−) and with (+) purification by gel filtration following treatment. (F) Purified proteins were injected i.v. at 10 mg/kg into human FcRN mice and concentrations in plasma were measured by ELISA for 5 days. For PK studies in this figure, data are mean ± SEM for n = 3 per group and proteins were purified from transiently transfected Expi293F.

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: High sialylation and YTE mutations in the Fc region enhance the pharmacokinetics of sACE2 2 .S19-IgG1 (A) Intravenous administration of proteins at 10 mg/kg into human FcRn mice. Blood was collected into heparin via retroorbital route at the plotted time points. Plasma levels of the indicated proteins were measured by ELISA. (B and C) Proteins were injected s.c. in the flank of human FcRn mice at a dose of 10 mg/kg (solid lines) or 100 mg/kg (broken line). (B) ACE2 catalytic activity in plasma and (C) protein concentrations based on ELISA. (D) sACE2 2 .S19-IgG1(YTE) was treated with PNGase F or neuraminidase. Proteins (20 μg) were analyzed without further purification by SDS-PAGE under non-reducing conditions and stained with Coomassie. The calculated molecular weight (MW) of the mature polypeptide (excluding glycans) is 218 kD for the dimer. PNGase F has an MW of 36 kD. A. ureafaciens neuraminidase is a mixture of isoenzymes. (E) Proteins (10 μg) were analyzed by IEF gel electrophoresis. Glycosidase-treated proteins were analyzed without (−) and with (+) purification by gel filtration following treatment. (F) Purified proteins were injected i.v. at 10 mg/kg into human FcRN mice and concentrations in plasma were measured by ELISA for 5 days. For PK studies in this figure, data are mean ± SEM for n = 3 per group and proteins were purified from transiently transfected Expi293F.

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Drug discovery, Clinical Proteomics, Enzyme-linked Immunosorbent Assay, Injection, Activity Assay, Purification, SDS Page, Staining, Molecular Weight, Nucleic Acid Electrophoresis, Filtration, Transfection

Pharmacokinetic properties of optimized decoy receptors in Tg32 mice

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: Pharmacokinetic properties of optimized decoy receptors in Tg32 mice

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Produced, Transfection

A single dose of sACE2 2 .S19-IgG1(YTE) sourced from Expi293F culture protects K18-hACE2 mice from lethal SARS-CoV-2 challenge (A and B) K18-hACE2 mice were inoculated intranasally with 1 × 10 4 PFU 2019n-CoV/USA_WA1/2020 virus. Mice were administered a single i.v. dose (10 mg/kg) of sACE2 2 .S19-IgG1(YTE) (red; purified from transiently transfected Expi293F culture) or IgG1 control (gray) 24 h post-inoculation. Survival (A) and weights (B) for N = 10 mice per treatment group. p value determined by Gehan-Breslow-Wilcoxon test. (C and D) Lungs of inoculated mice were harvested at day 7 and relative viral loads were determined by qPCR for mRNA expression levels of SARS-CoV-2 Spike (C) and Nsp (D). Mean ± SEM, N = 4 per treatment group. p values determined by unpaired t test.

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: A single dose of sACE2 2 .S19-IgG1(YTE) sourced from Expi293F culture protects K18-hACE2 mice from lethal SARS-CoV-2 challenge (A and B) K18-hACE2 mice were inoculated intranasally with 1 × 10 4 PFU 2019n-CoV/USA_WA1/2020 virus. Mice were administered a single i.v. dose (10 mg/kg) of sACE2 2 .S19-IgG1(YTE) (red; purified from transiently transfected Expi293F culture) or IgG1 control (gray) 24 h post-inoculation. Survival (A) and weights (B) for N = 10 mice per treatment group. p value determined by Gehan-Breslow-Wilcoxon test. (C and D) Lungs of inoculated mice were harvested at day 7 and relative viral loads were determined by qPCR for mRNA expression levels of SARS-CoV-2 Spike (C) and Nsp (D). Mean ± SEM, N = 4 per treatment group. p values determined by unpaired t test.

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Virus, Purification, Transfection, Control, Expressing

Sialylation of decoy receptors purified from different sources

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: Sialylation of decoy receptors purified from different sources

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Purification

The v2.4 and S19 mutations in ACE2 are predicted to have low immunogenicity (A) Computational analysis of calculated affinity of peptides to HLA-II allotypes. The wild-type sACE2 2 -IgG1 sequence (top row) is scanned for peptides predicted to be displayed on a common set of 14 HLA-II allotypes. In this analysis, the minimum threshold for a peptide to be considered an antigen is predicted affinity for four HLA-II allotypes (Nhits ≥4) from a set of 14 common alleles. For sACE2 2 -IgG1 derivatives, the sequence is grayed out except for the regions where mutations are introduced to highlight whether a mutation is within a predicted epitope and/or changes the probability of presentation. Peptides that were analyzed experimentally by yeast display are indicated below with dark red bars. (B) Peptides were displayed on yeast and binding to HLA-II following an HLA-DM-dependent peptide loading reaction was measured by flow cytometry. The correlation plot shows the agreement between two independent replicates measuring mean fluorescence units (MFU) for bound HLA-II. Polyserine negative control reactions are blue, positive control peptide/HLA-II pairs are orange, and ACE2 peptides are gray. (C) Yeast display measurements of HLA-II binding to ACE2 peptides is plotted from no signal (dark blue) to high binding signal (orange).

Journal: Molecular Therapy. Methods & Clinical Development

Article Title: Modulation of the pharmacokinetics of soluble ACE2 decoy receptors through glycosylation

doi: 10.1016/j.omtm.2024.101301

Figure Lengend Snippet: The v2.4 and S19 mutations in ACE2 are predicted to have low immunogenicity (A) Computational analysis of calculated affinity of peptides to HLA-II allotypes. The wild-type sACE2 2 -IgG1 sequence (top row) is scanned for peptides predicted to be displayed on a common set of 14 HLA-II allotypes. In this analysis, the minimum threshold for a peptide to be considered an antigen is predicted affinity for four HLA-II allotypes (Nhits ≥4) from a set of 14 common alleles. For sACE2 2 -IgG1 derivatives, the sequence is grayed out except for the regions where mutations are introduced to highlight whether a mutation is within a predicted epitope and/or changes the probability of presentation. Peptides that were analyzed experimentally by yeast display are indicated below with dark red bars. (B) Peptides were displayed on yeast and binding to HLA-II following an HLA-DM-dependent peptide loading reaction was measured by flow cytometry. The correlation plot shows the agreement between two independent replicates measuring mean fluorescence units (MFU) for bound HLA-II. Polyserine negative control reactions are blue, positive control peptide/HLA-II pairs are orange, and ACE2 peptides are gray. (C) Yeast display measurements of HLA-II binding to ACE2 peptides is plotted from no signal (dark blue) to high binding signal (orange).

Article Snippet: The expression plasmid for sACE2 2 .v2.4-IgG1 is previously described and deposited with Addgene (# 154106).

Techniques: Immunopeptidomics, Sequencing, Mutagenesis, Binding Assay, Flow Cytometry, Fluorescence, Negative Control, Positive Control

Figure 1. Aerosol delivery of sACE22.v2.4-IgG1 alleviates lung injury and improves survival of SARS-CoV-2 gamma variant infected K18-hACE2 transgenic mice.

Journal: EMBO molecular medicine

Article Title: An ACE2 decoy can be administered by inhalation and potently targets omicron variants of SARS-CoV-2.

doi: 10.15252/emmm.202216109

Figure Lengend Snippet: Figure 1. Aerosol delivery of sACE22.v2.4-IgG1 alleviates lung injury and improves survival of SARS-CoV-2 gamma variant infected K18-hACE2 transgenic mice.

Article Snippet: Plasmids for sACE22-IgG1 (Addgene #154104), sACE22.v2.4-IgG1 (#154106), sACE2(18-615)-8his (#149268), sACE2 (18-615).v2.4-8his (#149664), and Wuhan RBD-8his (#145145) are available from Addgene.

Techniques: Aerosol, Variant Assay, Infection, Transgenic Assay

Figure 2. Catalytic activity of sACE22.v2.4-IgG1 contributes to the therapeutic efficacy to mitigate mouse lung injury and improve survival following SARS-CoV-2 gamma infection.

Journal: EMBO molecular medicine

Article Title: An ACE2 decoy can be administered by inhalation and potently targets omicron variants of SARS-CoV-2.

doi: 10.15252/emmm.202216109

Figure Lengend Snippet: Figure 2. Catalytic activity of sACE22.v2.4-IgG1 contributes to the therapeutic efficacy to mitigate mouse lung injury and improve survival following SARS-CoV-2 gamma infection.

Techniques: Activity Assay, Drug discovery, Infection

Figure 3. sACE22.v2.4-IgG1 catalytic activity increases survival of SARS-CoV-2 WA-1/2020 infected K18-hACE2 mice.

Journal: EMBO molecular medicine

Article Title: An ACE2 decoy can be administered by inhalation and potently targets omicron variants of SARS-CoV-2.

doi: 10.15252/emmm.202216109

Figure Lengend Snippet: Figure 3. sACE22.v2.4-IgG1 catalytic activity increases survival of SARS-CoV-2 WA-1/2020 infected K18-hACE2 mice.

Techniques: Activity Assay, Infection

Figure 5. sACE22.v2.4-IgG1 inhibits SARS-CoV-2 BA.1 omicron replication in vivo.

Journal: EMBO molecular medicine

Article Title: An ACE2 decoy can be administered by inhalation and potently targets omicron variants of SARS-CoV-2.

doi: 10.15252/emmm.202216109

Figure Lengend Snippet: Figure 5. sACE22.v2.4-IgG1 inhibits SARS-CoV-2 BA.1 omicron replication in vivo.

Techniques: In Vivo

A Binding of monomeric sACE2‐8his proteins to Expi293F cells expressing S of BA.1 omicron was measured by flow cytometry. Data are mean ± SEM, N = 4 independent experiments. B Binding of dimeric sACE2 2 ‐IgG1 proteins was compared with the binding of antibodies authorized for therapeutic use in COVID‐19 patients. Binding to Expi293F cells expressing BA.1 omicron S was measured by flow cytometry. Data are mean ± SEM, N = 4 independent biological replicates. C Neutralization of BA.1 omicron pseudovirus. sACE2 2 ‐IgG1 (gray) or sACE2 2 .v2.4‐IgG1 (blue) were incubated with pseudovirus for 1 h before adding to HeLa‐hACE2‐11 cells. Infection 48 h later was measured by luciferase reporter gene expression. Data are mean ± SD, N = 3 independent biological replicates. D, E Authentic BA.1 omicron virus (isolate USA/MD‐HP20874/2021) was incubated with sACE2 2 ‐IgG1 (D) or sACE2 2 .v2.4‐IgG1 (E) for 1 h and added to Calu‐3 cells. Infection 48 h later was measured by RT–qPCR for the viral N gene. 3 μM remdesivir (black columns) is a positive neutralization control. Data are mean ± SD, N = 4 independent replicates.

Journal: EMBO Molecular Medicine

Article Title: An ACE2 decoy can be administered by inhalation and potently targets omicron variants of SARS‐CoV ‐2

doi: 10.15252/emmm.202216109

Figure Lengend Snippet: A Binding of monomeric sACE2‐8his proteins to Expi293F cells expressing S of BA.1 omicron was measured by flow cytometry. Data are mean ± SEM, N = 4 independent experiments. B Binding of dimeric sACE2 2 ‐IgG1 proteins was compared with the binding of antibodies authorized for therapeutic use in COVID‐19 patients. Binding to Expi293F cells expressing BA.1 omicron S was measured by flow cytometry. Data are mean ± SEM, N = 4 independent biological replicates. C Neutralization of BA.1 omicron pseudovirus. sACE2 2 ‐IgG1 (gray) or sACE2 2 .v2.4‐IgG1 (blue) were incubated with pseudovirus for 1 h before adding to HeLa‐hACE2‐11 cells. Infection 48 h later was measured by luciferase reporter gene expression. Data are mean ± SD, N = 3 independent biological replicates. D, E Authentic BA.1 omicron virus (isolate USA/MD‐HP20874/2021) was incubated with sACE2 2 ‐IgG1 (D) or sACE2 2 .v2.4‐IgG1 (E) for 1 h and added to Calu‐3 cells. Infection 48 h later was measured by RT–qPCR for the viral N gene. 3 μM remdesivir (black columns) is a positive neutralization control. Data are mean ± SD, N = 4 independent replicates.

Article Snippet: Plasmids for sACE2 2 ‐IgG1 (Addgene #154104), sACE2 2 .v2.4‐IgG1 (#154106), sACE2(18‐615)‐8his (#149268), sACE2(18‐615).v2.4‐8his (#149664), and Wuhan RBD‐8his (#145145) are available from Addgene.

Techniques: Binding Assay, Expressing, Flow Cytometry, Neutralization, Incubation, Infection, Luciferase, Gene Expression, Virus, Quantitative RT-PCR, Control

A Using flow cytometry, binding to Expi293F cells expressing S of BA.2 omicron was measured for monomeric sACE2‐8his proteins. Data are mean ± SEM, N = 3 independent biological replicates. B Binding of antibodies and dimeric sACE2 2 ‐IgG1 proteins to Expi293F cells expressing BA.2 omicron S measured by flow cytometry. Data are mean ± SEM, N = 4 independent experiments. C BA.2 omicron pseudovirus was incubated with sACE2 2 ‐IgG1 (gray) or sACE2 2 .v2.4‐IgG1 (blue) for 1 h and added to HeLa‐hACE2‐11 cells. Infection was measured after 48 h. Data are mean ± SD, N = 3 independent replicates. D, E Binding of monomeric sACE2‐8his proteins (D) and dimeric IgG1 proteins (E) to Expi293F cells expressing BA.4/BA.5 omicron S as measured by flow cytometry. Data are mean ± SEM, N = 3 independent experiments.

Journal: EMBO Molecular Medicine

Article Title: An ACE2 decoy can be administered by inhalation and potently targets omicron variants of SARS‐CoV ‐2

doi: 10.15252/emmm.202216109

Figure Lengend Snippet: A Using flow cytometry, binding to Expi293F cells expressing S of BA.2 omicron was measured for monomeric sACE2‐8his proteins. Data are mean ± SEM, N = 3 independent biological replicates. B Binding of antibodies and dimeric sACE2 2 ‐IgG1 proteins to Expi293F cells expressing BA.2 omicron S measured by flow cytometry. Data are mean ± SEM, N = 4 independent experiments. C BA.2 omicron pseudovirus was incubated with sACE2 2 ‐IgG1 (gray) or sACE2 2 .v2.4‐IgG1 (blue) for 1 h and added to HeLa‐hACE2‐11 cells. Infection was measured after 48 h. Data are mean ± SD, N = 3 independent replicates. D, E Binding of monomeric sACE2‐8his proteins (D) and dimeric IgG1 proteins (E) to Expi293F cells expressing BA.4/BA.5 omicron S as measured by flow cytometry. Data are mean ± SEM, N = 3 independent experiments.

Techniques: Flow Cytometry, Binding Assay, Expressing, Incubation, Infection

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