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UIowa spin-off company hC Bioscience raises $24 Million Series A to develop protein-editing therapies

hC Bioscience, a drug discovery and development company focused on tRNA-based therapeutics targeting protein dysfunction, has closed a Series A financing of $24 million led by ARCH Venture Partners, Takeda Ventures and 8VC.

hC Bio is advancing two complementary platforms. One is directed at restoring protein function when “nonsense mutations,” or premature termination codons (PTCs), cause protein dysfunction, a problem responsible for 10 – 15% of all human disease. This platform, called PTCX (“Patch”), employs tRNA that suppresses such errors in the genetic code to allow the proper full-length protein to be produced.

hC Bio is simultaneously developing a second tRNA-based platform called SWTX (“Switch”) to target diseases caused by missense mutations. This technology is designed to correct for such mutations in proteins that cause disease.

Leslie J. Williams, president and CEO, and Professor Christopher Ahern, from the University of Iowa founded the company in early 2021 to translate and augment the foundational work performed in the Ahern lab in Iowa City.

“We are creating medicines to restore protein function to its intended state without editing genes,” said Williams. “A single tRNA therapy has the potential to treat many diseases regardless of the gene or location of the mutation.”

Along with the close of hC Bioscience’s Series A financing, the company has also appointed David Altreuter, Ph.D., as chief technology officer.

UIowa spin-off company hC Bioscience raises $24 Million Series A to develop protein-editing therapies | Clay & Milk
A central Iowa ag-tech accelerator has secured more backers and finally has a name. The Greater Des Moines Partnership first announced the accelerator last year, naming four initial investors. On Monday, the Partnership said the program will be called the "Iowa AgriTech Accelerator" and named three new investors. The new investors include Grinnell Mutual, Kent Corp. and Sukup Manufacturing, all Iowa companies. They join investors Deere & Co., Peoples Co., Farmers Mutual Hail Insurance Co. and DuPont Pioneer. Each investor has agreed to put up $100,000 for the first year of the accelerator. Startups entering the program will receive $40,000 in seed funding in exchange for 6 percent equity. Tej Dhawan, an angel investor and local startup mentor, is serving as interim director until the AgriTech Accelerator names a permanent leader. Dhawan held a similar role with the GIA before Brian Hemesath was named as managing director. As interim director, Dhawan said his main job includes hiring the accelerator's executive director, establishing a business structure and initial recruiting for the first cohort. The accelerator will place few filters, such as location and product, on the applicant pool, Dhawan said. "When you’re seeking innovation, innovation can come from every corner of the world so why restrict ourselves," he said. One area the the AgriTech Accelerator won't recruit from is biotech. For its first cohort, the AgriTech Accelerator will work out of the GIA's space in Des Moines' East Village, Dhawan said. A future, permanent home is still to be decided. The accelerator's program will host startups from mid-July through mid-October, ending with an event connected to the annual World Food Prize. The GIA, which the AgriTech Accelerator is based on, also ends with presentations at an industry event. The accelerator has also started lining up a mentor pool. The Iowa Corn Growers Association, Iowa Soybean Association and the Iowa Pork Producers Association have agreed to provide mentors, as has Iowa State University. While the AgriTech Accelerator is loosely based off of the GIA, it will differ in its business structure, Dhawan said. The GIA runs through a for-profit model for both operations and its investment fund. The AgriTech Accelerator will have a nonprofit model for its operations and a for-profit setup for its fund. Dhawan said the nonprofit model is being used so the accelerator can better work with other nonprofit partners, such as trade associations. "These are all organizations that are nonprofits and can be amazing stakeholders without ever having to be investors in the accelerator," he said. "It becomes easier to work with trade associations in their nonprofit role when we are also a nonprofit." When it's up and running, the AgriTech Accelerator would be one of a handful of ag-focused startup development programs in Iowa. Others include the Ag Startup Engine out of Iowa State University and the Rural Ventures Alliance from Iowa MicroLoan. Matthew Patane is the managing editor and co-founder of Clay & Milk. Send him an email at
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