JJP Biologics Announces Positive Decision to Execute a First-in-Human Clinical Trial of Anti-Inflammatory mAb JJP-1212 (anti-CD89)

JJP Biologics

JJP Biologics has received a positive conclusion on the Clinical Trial Application assessment for a Phase I Study of a potential first-in-class anti-CD89 antagonist, JJP-1212 monoclonal antibody for the treatment of various IgA-mediated autoimmune- and fibrotic diseases.


JJP Biologics, a private biopharmaceutical company developing innovative antibody-based therapies, announces a positive decision, issued by the European Medicines Agency, on the Clinical Trial Application to conduct a phase I clinical study in healthy participants (EudraCT: 2023-508661-33-00) with their potential first-in-class anti-CD89 antagonist, JJP-1212.

Up to date, JJP Biologics is the first Polish company to receive approval to perform the First-in-Human clinical trial with a novel therapeutic monoclonal antibody.

The Phase I trial will be executed in Poland. The study endpoints are designed for a comprehensive evaluation of the treatment’s safety profile. The drug will be administered via intravenous infusion in single and multiple ascending dose cohorts. Population size was determined as 48 healthy adult volunteers.

The study results will provide data on the safety and tolerability of JJP-1212, and full PK/PD profiles that subsequently enable the determination of optimal treatment regimens in future studies with patient populations. JJP Biologics intends to use Phase I read-outs as supporting data for a set of Phase II trials, in a range of therapeutic areas, and regions (including EU and the US).

“I clearly remember the day when, Prof. Marjolein van Egmond, VU University Medical Center Amsterdam and Scientific Advisory Board member at JJP Biologics, told me about the exciting biology of the IgA-CD89 axis and its pathological consequences in autoimmunity. Stratification of patients can easily be achieved by measuring IgA autoantibodies beyond IgG and IgM levels. While safety data are still needed, this decision is an important milestone for patients suffering from IgA-mediated autoimmune or fibrotic diseases and validates the preclinical package of JJP-1212. I am very grateful towards the JJP Biologics team for all their efforts and the Starak family for their continued trust and support.” – Louis Boon, Ph.D., CSO and Management Board Member at JJP Biologics.

According to Paweł Szczepański, COO and Management Board Member at JJP Biologics – “This is a historically unprecedented approval of a first-in-human clinical trial for a novel large molecule therapy from Poland. It forms a landmark that will further strengthen the position of the Polish biotech sector on the global map blazing the trail for many innovative therapies to come from this part of Europe. Including the next ones from the development platform of JJP Biologics.”

/Public Release.