Equillium’s Partner Biocon Initiates Phase 2 Study of Itolizumab in Ulcerative Colitis

Equillium, Inc. (Nasdaq: EQ), a clinical-stage biotechnology company focused on developing novel therapeutics to treat severe autoimmune and inflammatory disorders, today announced that Biocon Limited, in collaboration with Equillium, has initiated a Phase 2 clinical study of itolizumab in patients with ulcerative colitis (UC).

The Phase 2 double-blinded placebo-controlled clinical study is evaluating the safety and efficacy of itolizumab for biologics-naïve patients with moderate to severe active UC, where patients are randomized 1:1:1 to receive a fixed dose of 140 mg of itolizumab, adalimumab, or placebo every two weeks for a 12-week treatment period, with adalimumab non-responders able to cross over to itolizumab. The study is expected to enroll up to 90 patients in multiple clinical trial sites in India. The trial design and initiation have been a collaborative effort, with help from the gastroenterologist community and leading global clinical and scientific experts in the field of inflammatory bowel disease (IBD).

“T cells play a pivotal role in the immune response that leads to IBD and preclinical models show a role for CD6 in disease pathogenesis,” said Dr. Maple Fung, senior vice president of clinical development at Equillium. “As itolizumab has a novel dual mechanism of action that modulates both the activity and trafficking of CD6-expressing T effector cells, it is a promising candidate for treatment of ulcerative colitis, where the severe inflammation can be debilitating. Additional supportive rationale can be found in our ongoing program investigating itolizumab in severe acute graft-versus-host disease, where our Phase 1b EQUATE study demonstrated meaningful complete responses, particularly in those with lower gastroenterological symptoms. We’re excited to see the UC study begin enrollment, as it may provide evidence of an efficacy signal for the use of itolizumab in the treatment of patients with ulcerative colitis.”

“We are encouraged by the progress being made on our high-value, multi-indication molecule, itolizumab, in collaboration with Equillium,” said Siddharth Mittal, managing director and chief executive officer of Biocon Limited. “The commencement of the Phase 2 clinical study, that will provide data related to its efficacy as a treatment of ulcerative colitis, is an important step forward in our efforts to bring the potential benefit of itolizumab to patients in India suffering from this disease. The development also underpins Biocon’s commitment to bring innovative, affordable medicines, that address unmet patient needs, to market expeditiously.”

For more information on UC and Biocon’s clinical study of itolizumab in UC, as well as queries to enroll in the study, please write to ucp2_itoli_study.team@biocon.com.

About Itolizumab

Itolizumab is a clinical-stage, first-in-class anti-CD6 monoclonal antibody that selectively targets the CD6-ALCAM pathway. This pathway plays a central role in modulating the activity and trafficking of T cells that drive a number of immuno-inflammatory diseases. Equillium acquired rights to itolizumab through an exclusive partnership with Biocon Limited. Equillium has executed an exclusive option and asset purchase agreement for the development and commercialization of itolizumab with Ono Pharmaceutical Co., Ltd.

About Equillium

Equillium is a clinical-stage biotechnology company leveraging a deep understanding of immunobiology to develop novel therapeutics to treat severe autoimmune and inflammatory disorders with high unmet medical need. The company’s pipeline consists of the following novel immunomodulatory assets targeting immuno-inflammatory pathways. Itolizumab, a first-in-class monoclonal antibody that targets the CD6-ALCAM signaling pathway which plays a central role in the modulation of effector T cells, is currently in a Phase 3 study for patients with acute graft-versus-host disease (aGVHD) and is in a Phase 1b study for patients with lupus/lupus nephritis. EQ101 is a first-in-class tri-specific cytokine inhibitor that selectively targets IL-2, IL-9, and IL-15. Equillium is currently enrolling patients in a Phase 2 proof-of-concept study of EQ101 for patients with alopecia areata. EQ102 is a bi-specific cytokine inhibitor that selectively targets IL-15 and IL-21. Equillium is currently enrolling patients in a Phase 1 study of EQ102, including healthy volunteers and celiac disease patients.

For more information, visit www.equilliumbio.com.

About Biocon Limited

Biocon Limited, publicly listed in 2004, (BSE code: 532523, NSE Id: BIOCON, ISIN Id: INE376G01013) is an innovation-led, global biopharmaceutical company committed to enhancing affordable access to complex therapies for chronic conditions like diabetes, cancer and autoimmune diseases. It has developed and commercialized novel biologics, biosimilars, and complex small molecule APIs in India and several key global markets, as well as generic formulations in the US and Europe. It also has a pipeline of promising novel assets in immunotherapy under development. For more information, visit www.biocon.com.

Additional Information and Where to Find It

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval with respect to the proposed merger or otherwise. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended. In connection with Metacrine, Inc.’s pending acquisition by Equillium, Inc., Equillium filed a registration statement on Form S-4 (File No. 333-268024) containing a joint proxy statement/prospectus of Equillium and Metacrine and other documents concerning the proposed merger with the Securities and Exchange Commission (the “SEC”). EQUILLIUM URGES INVESTORS TO READ THE JOINT PROXY STATEMENT/PROSPECTUS AND THESE OTHER MATERIALS CAREFULLY BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT EQUILLIUM, METACRINE AND THE PROPOSED MERGER. Investors may obtain free copies of the joint proxy statement/prospectus and other documents filed by Equillium and Metacrine with the SEC at the SEC’s website at www.sec.gov. Free copies of the joint proxy statement/prospectus and Equillium’s other SEC filings are also available on Equillium’s website at www.equilliumbio.com.

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Forward Looking Statements

Statements contained in this press release regarding matters that are not historical facts are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements may be identified by the use of words such as "anticipate", "believe", “could”, “continue”, "expect", "estimate", “may”, "plan", "outlook", “future” and "project" and other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Because such statements are subject to risks and uncertainties, many of which are outside of the Company’s control, actual results may differ materially from those expressed or implied by such forward-looking statements. Such statements include, but are not limited to statements regarding the potential benefits and risks of the transactions contemplated by the option and asset purchase agreement entered into by the Company and Ono, including the possibility that Ono does not exercise the option, the Company receives no further payments under the option and asset purchase agreement other than those payable upon signing, the possibility that, if commercialized, itolizumab proves to be more valuable than contemplated by the option and asset purchase agreement, the fluctuation of the foreign exchange rate, the benefit of treating patients with aGVHD or lupus/lupus nephritis with itolizumab, Equillium’s plans and expected timing for developing itolizumab including the expected timing of initiating, completing and announcing further results from the EQUATOR, EQUATE and EQUALISE studies, Equillium’s plans and expected timing for developing EQ101 and EQ102 including the expected timing of initiating, completing and announcing further results from Phase 2 and Phase 1 studies, respectively, the potential for any of Equillium’s ongoing or planned clinical studies to show safety or efficacy, Equillium’s anticipated timing of regulatory review and feedback, Equillium’s cash runway, and Equillium’s plans and expected timing for developing its product candidates and potential benefits of its product candidates. Risks that contribute to the uncertain nature of the forward-looking statements include: uncertainties related to the abilities of the leadership team to perform as expected; Equillium’s ability to execute its plans and strategies; risks related to performing clinical studies; the risk that interim results of a clinical study do not necessarily predict final results and that one or more of the clinical outcomes may materially change as patient enrollment continues, following more comprehensive reviews of the data, and as more patient data become available; potential delays in the commencement, enrollment and completion of clinical studies and the reporting of data therefrom; the risk that studies will not be completed as planned; Equillium’s plans and product development, including the initiation and completion of clinical studies and the reporting of data therefrom; whether the results from clinical studies will validate and support the safety and efficacy of Equillium’s product candidates; risks related to Ono’s financial condition, willingness to continue to fund the development of itolizumab, and decision to exercise its option to purchase itolizumab or terminate the option and asset purchase agreement; changes in the competitive landscape; uncertainties related to Equillium’s capital requirements; and having to use cash in ways or on timing other than expected and the impact of market volatility on cash reserves. These and other risks and uncertainties are described more fully under the caption "Risk Factors" and elsewhere in Equillium's filings and reports, which may be accessed for free by visiting EDGAR on the SEC web site at http://www.sec.gov and on the Company’s website under the heading “Investors.” Investors should take such risks into account and should not rely on forward-looking statements when making investment decisions. All forward-looking statements contained in this press release speak only as of the date on which they were made. Equillium undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made.

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