Collaboration allows Hillstream to enter rapidly growing Immuno-oncology therapeutics market

 By capitalizing on the long half-life of tumor targeting Quatramers™ combined with OmniTaur™-derived Picobodies™, the lead program, HSB-1940, is being developed to target PD-1

Picobodies are the smallest known antibody fragment, comprised of ultra-long CDR H3 sequences of 30-40 amino acids rich with cysteines that create tightly folded structures capable of binding recessed epitopes

Hillstream BioPharma, Inc. (Nasdaq: HILS) (“Hillstream”, the “Company”) today announced the development of proprietary targeted biologics, Knob Quatrabodies™ (HSB-1940) against PD-1. Hillstream signed separate collaboration agreements with a subsidiary of OmniAb, Inc. (Nasdaq: OABI) (“OmniAb”) and with Minotaur Therapeutics, Inc. (“Minotaur”) to advance Picobodies against novel, unreachable and undruggable epitopes in high-value validated targets starting with PD-1.

The technologies of Hillstream and Minotaur will be combined under a previously disclosed license from OmniAb to discover, develop and advance biotherapeutics against high-value validated targets. Picobodies are antibody “knob” domains comprised of cysteine-rich ultralong complementary determining region (CDR) H3 sequences of 30-40 amino acids, which have the potential to access challenging epitopes better than full size antibodies can.

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