Eftansomatropin Alfa (TJ101)

Differentiated long-acting growth hormone

2024 BLA planned in China

Eftansomatropin alfa (TJ101) is a potential highly differentiated long-acting recombinant human growth hormone being developed as a more convenient and effective therapy for growth hormone deficiency (GHD). Like endogenous growth hormone, eftansomatropin alfa stimulates the production of insulin-like growth factor 1 (IGF-1) in the liver, which has growth-stimulating effects on a variety of tissues, including osteoblast and chondrocyte activities that stimulate bone growth. IGF-1 is a reliable pharmacodynamic marker and the key mediator of growth-promoting activity of eftansomatropin alfa.

Eftansomatropin alfa is based on Genexine’s patented hyFc® technology. The hyFc part consists of a portion of human immunoglobulin D (“IgD”) and G4 (“IgG4”). The former contains a flexible hinge, and the latter is responsible for half-life extension through neonatal Fc receptor (“FcRn”)-mediated recycling.

Felzartamab (TJ202)

Differentiated CD38 mAb

2024 Phase 3 PFS data

Felzartamab (TJ202/MOR202) is an investigational human monoclonal antibody derived from MorphoSys’ HuCAL® antibody technology. The antibody is directed against CD38 on the surface of multiple myeloma cells, which has been characterized as one of the most strongly and uniformly expressed antigens on the surface of malignant plasma cells.

According to its suggested mode of action, the antibody recruits cells of the body’s immune system to kill the tumor through antibody-dependent cellular cytotoxicity (ADCC) and antibody-dependent cellular phagocytosis (ADCP). The antibody does not involve complement dependent cytotoxicity, or CDC, an additional immune mechanism involved in tumor cell killing.

Scientific research suggests that an anti-CD38 antibody may have therapeutic potential also in other cancers as well as autoimmune diseases. Based on a licensing agreement between MorphoSys and I-Mab signed in November 2017, I-Mab owns the exclusive rights for development and commercialization of TJ202/MOR202 in mainland China, Taiwan, Hong Kong and Macao.

Lemzoparlimab (TJC4)

Novel CD47 mAb

Phase 3 ongoing in China*

CD47 is a cell surface protein over-expressed in a wide variety of cancers and can act to protect tumors by delivering a “don’t eat me” signal to otherwise tumor-engulfing macrophages. CD47 antibody blocks this signal and enables macrophages to attack tumor cells.

However, development of CD47 antibody as a cancer therapy has been hampered by its hematologic side effects, such as severe anemia, caused by natural binding of CD47 antibody to red blood cells. Scientists at I-Mab discovered a novel CD47 antibody, lemzoparlimab, that is designed to target tumor cells while exerting a minimal untoward effect on red blood cells.

Multiple clinical studies of lemzoparlimab are ongoing to explore indications in treating patients with myelodysplastic syndrome (MDS), acute myelocytic leukemia (AML), non-Hodgkin’s lymphoma (NHL), and advanced solid tumors in combination with chemotherapy and immune checkpoint inhibitors.

* The trial for lemzoparlimab is currently ongoing in China, while all related programs in the US have been discontinued.