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10.1021/jacs.2c02537

http://scihub22266oqcxt.onion/10.1021/jacs.2c02537
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35675509!9199438!35675509
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suck abstract from ncbi


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pmid35675509      J+Am+Chem+Soc 2022 ; 144 (25): 11226-11237
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  • Antibody-Invertase Fusion Protein Enables Quantitative Detection of SARS-CoV-2 Antibodies Using Widely Available Glucometers #MMPMID35675509
  • Leonard EK; Aller Pellitero M; Juelg B; Spangler JB; Arroyo-Curras N
  • J Am Chem Soc 2022[Jun]; 144 (25): 11226-11237 PMID35675509show ga
  • Rapid diagnostics that can accurately inform patients of disease risk and protection are critical to mitigating the spread of the current COVID-19 pandemic and future infectious disease outbreaks. To be effective, such diagnostics must rely on simple, cost-effective, and widely available equipment and should be compatible with existing telehealth infrastructure to facilitate data access and remote care. Commercial glucometers are an established detection technology that can overcome the cost, time, and trained personnel requirements of current benchtop-based antibody serology assays when paired with reporter molecules that catalyze glucose conversion. To this end, we developed an enzymatic reporter that, when bound to disease-specific patient antibodies, produces glucose in proportion to the level of antibodies present in the patient sample. Although a straightforward concept, the coupling of enzymatic reporters to secondary antibodies or antigens often results in low yields, indeterminant stoichiometry, reduced target binding, and poor catalytic efficiency. Our enzymatic reporter is a novel fusion protein that comprises an antihuman immunoglobulin G (IgG) antibody genetically fused to two invertase molecules. The resulting fusion protein retains the binding affinity and catalytic activity of the constituent proteins and serves as an accurate reporter for immunoassays. Using this fusion, we demonstrate quantitative glucometer-based measurement of anti-SARS-CoV-2 spike protein antibodies in blinded clinical sample training sets. Our results demonstrate the ability to detect SARS-CoV-2-specific IgGs in patient serum with precise agreement to benchmark commercial immunoassays. Because our fusion protein binds all human IgG isotypes, it represents a versatile tool for detection of disease-specific antibodies in a broad range of biomedical applications.
  • |*COVID-19/diagnosis[MESH]
  • |*Pandemics[MESH]
  • |Antibodies, Viral[MESH]
  • |Glucose[MESH]
  • |Humans[MESH]
  • |Immunoglobulin G[MESH]
  • |SARS-CoV-2[MESH]
  • |Sensitivity and Specificity[MESH]


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