Korro Bio hits the high notes with $91.5M series A to run its OPERA RNA platform – FierceBiotech

Posted: September 12, 2020 at 12:52 pm

Korro Bio has got off a meaty series A funding round, nabbing $91.5 million to run its platform of single-base RNA edits to treat a range of diseases.

The Cambridge, Massachusetts-based biotech will use the cash haul toward getting its preclinical program into the clinic, while also establishing a broad portfolio of innovative RNA editing therapies.

The financing was led by Wu Capital with help from current investors Atlas Venture and New Enterprise Associates. Additional new investors include Qiming Venture Partners USA, Surveyor Capital (a Citadel company), Cormorant Asset Management, MP Healthcare Venture Management and Alexandria Venture Investments.

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Korro's platform, known as OPERA (Oligonucleotide Promoted Editing of RNA), harnesses the bodys natural base editing system.

OPERA can repair disease-causing mutations at the RNA level, in addition to creating therapeutically beneficial versions of proteins to improve patient outcomes, the biotech said in a statement. This method is based upon the work of Josh Rosenthal, Ph.D., of the Marine Biological Laboratory in Massachusetts, an affiliate of the University of Chicago.

The company, launched last year, is helmed by Nessan Bermingham, Ph.D., who three years back, handed the reins of gene editing biotech Intellia Therapeutics over to John Leonard, M.D., the R&D chief who had built the company alongside him.

After a break, he landed at Atlas Venture, the VC firm that helped launch Intellia in 2014 and that debuted Korro Bio, Berminghams latest project, last year.

Korros approach relies on nucleotide deamination, an endogenous RNA-modifying process that already happens in cells. Specifically, it takes advantage of a family of RNA-editing enzymes called adenosine deaminases acting on RNA (ADARs).

This group of enzymes deaminates the nucleotide adenosine to make inosine, which is read as guanosine (G) inside cells.

Korros ADAR approach doesnt permanently edit the genome by making a double-stranded cut in the DNA, like CRISPR systems do. With CRISPR-Cas9 systems, the delivery vehicle has to carry the actual gene-cutting mechanism. With Korros approach, that RNA-editing protein is already in the cell.

Korro is still not disclosing indications, but Duchenne muscular dystrophy and Parkinsons disease are two areas in which G-to-A mutations play a role.

This technology holds tremendous potential to usher in a new era of RNA editing therapies, said Bermingham.

We are leveraging a natural cellular system that has evolved over millions of years to base edit RNA. By co-opting these endogenous enzymes, we can create highly targeted, titratable and reversible therapeutics that are straightforward to design, manufacture and deliver. We are grateful for the continued support of our existing investors and look forward to working with our new investors to advance a new generation of transformational therapies to the clinic.

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Korro Bio hits the high notes with $91.5M series A to run its OPERA RNA platform - FierceBiotech

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