BioTuesdays

IBIO-201 demonstrates ability to elicit anti-SARS-CoV-2 immune response in preclinical studies

iBio Inc.

iBio (NYSE AMERICAN:IBIO) reported initial results from preclinical studies of IBIO-201, one of its two COVID-19 vaccine candidates.

IBIO-201 is a subunit vaccine that combines antigens derived from the SARS-CoV-2 spike protein fused with the company’s patented lichenase booster molecule (LicKM).

iBio completed 10 distinct preclinical study arms testing various antigen-adjuvant combinations. Anti-SARS-CoV-2 spike titers to IBIO-201 were observed 21 days after immunization and continued to increase over the 42-day study, generating favorable helper T-cell immune profiles. 

In addition, early ex vivo testing of antisera from IBIO-201-immunized mice demonstrated the presence of antibodies that interfere with the binding of SARS-CoV-2 spike protein sequences to human ACE2.

“We are encouraged by these preclinical data, which demonstrate IBIO-201’s ability to generate an immune response to SARS-CoV-2 sequences and neutralize protein interaction,” Tom Isett, iBio’s chairman and CEO, said in a statement.

The company plans to conduct additional testing of IBIO-201 antisera, including further evaluations of neutralizing titers and immune profiling studies. 

“We expect to gain more insight as we complete data analysis of both of our COVID-19 vaccine candidates,” he added. 

Additional testing for both IBIO-201 and IBIO-200 is occurring in collaboration with the Texas A&M University System laboratories.

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