TRACON Pharmaceuticals Announces Submission of IND Application for TJ4309 (CD73 Antibody TJD5) for Treatment of Advanced Solid Tumors

SAN DIEGO, CA, USA I December 26, 2018 I TRACON Pharmaceuticals (NASDAQ:TCON), a clinical stage biopharmaceutical company focused on the development and commercialization of novel targeted therapeutics for cancer, today announced that TRACON has submitted an Investigational New Drug (IND) application with the U.S. Food and Drug Administration (FDA) for the initiation of a Phase 1 clinical study of TJ4309 in patients with advanced solid tumors.

TJ4309, also known as TJD5, is a CD73 antibody from I-Mab’s proprietary discovery pipeline that is being co-developed through an agreement between TRACON and I-Mab that was signed on November 28, 2018.  The agreement between the two companies is part of a broad strategic partnership to develop multiple immuno-oncology programs with first-in-class and best-in-class potential from I-Mab’s immuno-oncology portfolio, including several proprietary bispecific antibodies under development by I-Mab.

“The IND filing for TJ4309 within four weeks of signing the strategic partnership agreement with I-Mab is an important milestone for TRACON in two ways,” commented Charles Theuer, M.D., Ph.D., President and CEO of TRACON. “We have both expanded our pipeline into immuno-oncology and further demonstrated the efficiency of our product development platform designed to reduce the cost and time of clinical development for our partners.  We look forward to initiating this Phase 1 clinical trial in early 2019.”

About TJ4309

TJ4309, also known as TJD5, is a novel, humanized antibody against CD73, highly expressed on various cancer cells that converts extracellular adenosine monophosphate (AMP) to adenosine, leading to the formation of immunosuppressive tumor microenvironment.  TJD5 is expected to start a phase I clinical trial in the US in early 2019 to assess the tolerability and preliminary efficacy as a single agent and in combination with a PD-1/PD-L1 checkpoint inhibitor in patients with advanced solid tumors. The antibody is also expected to be studied in clinical trials in China sponsored by I-Mab.


TRACON develops targeted therapies for cancer and ophthalmic diseases. The Company’s clinical-stage pipeline includes: TRC105, an endoglin antibody that is being developed for the treatment of multiple cancers; DE-122, the ophthalmic formulation of TRC105 that is being developed in wet AMD through a collaboration with Santen Pharmaceutical Company Ltd.; TRC102, a small molecule being developed for the treatment of lung cancer and glioblastoma; and TRC253, a small molecule being developed for the treatment of prostate cancer. TRACON is actively seeking additional corporate partnerships whereby it leads regulatory and clinical development and shares in the cost and risk of clinical development and commercialization of new product candidates.  In these partnerships TRACON believes it can serve as a solution for companies without clinical and commercial capabilities in the United States.  To learn more about TRACON and its product candidates, visit TRACON's website at

SOURCE: TRACON Pharmaceuticals

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