FDA Adds Kantaro's Semi-Quantitative COVID-19 Antibody Test to Revised Emergency Use Authorization for Convalescent Plasma (RNLX)

February 10, 2021 11:33 AM EST
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antaro Biosciences, LLC, a joint venture between the Mount Sinai Health System and RenalytixAI (LSE:RENX / NASDAQ: RNLX), and manufacturing partner Bio-Techne Corporation (NASDAQ: TECH), announced that the U.S. Food and Drug Administration (FDA) has added COVID-SeroKlir to the Emergency Use Authorization (EUA) for the use of convalescent plasma for treating COVID-19 in hospitalized patients. COVID-SeroKlir detects the presence and precise level of SARS-CoV-2 IgG antibodies with 98.8% sensitivity and 99.6% specificity.

"We are pleased the FDA has added Kantaro's COVID-SeroKlir antibody test to the EUA for convalescent plasma."

The revised EUA qualifies the COVID-SeroKlir test for detecting high titer COVID-19 convalescent plasma during manufacturing. The EUA limits the use of high titer COVID-19 convalescent plasma only to treat hospitalized patients early in the disease course. COVID-19 convalescent plasma is an investigational product and is not currently approved or licensed for any indication.

"We are pleased the FDA has added Kantaro's COVID-SeroKlir antibody test to the EUA for convalescent plasma and authorized the test's use in qualifying convalescent plasma titers," said Erik Lium, PhD, Chairman of the Board of Kantaro and Executive Vice President and Chief Commercial Innovation Officer at the Mount Sinai Health System. "We believe semi-quantitative antibody testing can play an important role in the development of advanced therapeutics for COVID-19 and appreciate that it is being recognized as such."

The high performance of COVID-SeroKlir results from a two-step process that detects antibodies against two virus antigens, the full-length spike protein and its receptor-binding domain. This precision makes the Kantaro test accurate, with a low potential for false results. Mount Sinai developed the test's underlying technology, which has been used close to 90,000 times on a highly diverse patient population. COVID-SeroKlir received Emergency Use Authorization by the FDA in November 2020.



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