• Wednesday, March 1, 2023 @ 7:00 pm

Ymmunobio, a preclinical stage biotech company specializing in the development of innovative treatments for cancer patients, announced today that it has been granted Orphan Drug Designation (ODD) by the US Food & Drug Administration (FDA) for YB-200, a CEACAM1/5 antibody it is studying for the treatment of hepatocellular carcinoma (HCC).

“This designation is an important milestone in our development of CEACAM antibodies as anti-cancer treatments,” said Ymmunobio Founder and CEO Katrin Rupalla, PhD. “We’re very pleased to continue our investigation into CEACAM antibodies for the treatment of hepatocellular carcinoma.”

YB-200 belongs to a novel class of CEACAM1 antibodies with a dual action. It acts as a checkpoint inhibitor, but also has a direct immune agonistic effect on immune cells. The antibody is currently in preclinical development. The in vivo  anti-tumor data in liver cancer were presented at the SITC 37th Annual Meeting1 in a poster presentation2 entitled “Novel, immune agonistic CEACAM1/5 antibody (YB-200) demonstrates anti-tumor efficacy and significantly increases B-cell response in syngeneic liver Hepa1-6 tumor microenvironment.”

Hepatocellular carcinoma (3) (HCC), or liver cancer, occurs when a tumor grows on the liver. It is responsible for over 12,000 deaths per year in the United States, making it one of the most serious cancers in adults. HCC is most often diagnosed in people aged 50 and over.4

The FDA grants ODD to medicines intended for the treatment, diagnosis or prevention of rare diseases or disorders that affect fewer than 200,000 people in the US.


1 SITC 37th Annual Meeting Abstracts, 2022. Society for Immunotherapy of Cancer

2 Journal for Immunotherapy of Cancer, Volume 10, Issue Suppl 2.

3 Liver Cancer, Johns Hopkins Medicine

4 Liver Cancer, Hepatocellular Carcinoma, Medline Plus, National Library of Medicine

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