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Press Release

SillaJen Announces First Patient Enrolled in Renal Cell Carcinoma Trial with Pexa-Vec in Combination with Regeneron's Cemiplimab

Posted on: 24 Jun 18

SAN FRANCISCO, and SEOUL, Korea, June 20, 2018 /PRNewswire/ -- SillaJen, Inc., (KOSDAQ:215600), a clinical-stage, biotherapeutics company focused on the development of oncolytic immunotherapy products for cancer, announced the first patient has been enrolled in REN026, the Phase 1b clinical trial of Pexa-Vec (pexastimogene devacirepvec) in combination with cemiplimab (REGN2810) for the treatment of renal cell cancer (RCC).  The first patient was enrolled in the United States, with expansion to sites in South Korea and Australia anticipated over the coming weeks.

SillaJen is collaborating with Regeneron to evaluate Pexa-Vec, SillaJen's lead clinical candidate, in combination with Regeneron's cemiplimab, an anti-PD1 monoclonal antibody.  The aim of the trial is to assess the safety and efficacy of the combination in patients with unresectable or metastatic renal cell carcinoma.  The study will also investigate the immune modulating potential of Pexa-Vec given concurrently with checkpoint inhibitor therapy by evaluating multiple blood and tissue biomarkers.

"Given the initial activity seen with Pexa-Vec monotherapy and the potential of oncolytic viruses to enhance anti-tumor immunity, combining Pexa-Vec with cemiplimab is quite rational and has the promise to build upon the activity of checkpoint inhibitor therapy alone in RCC.  This trial will not only assess the clinical activity of the two agents but allow us to assess in more depth the changes elicited in anti-tumor immunity following treatment by examining peripheral blood and tumor samples.  This will give us proof of concept data that will help us expand this approach to other tumor types," stated James Burke, M.D., chief medical officer at SillaJen.

About Pexa-Vec and the SOLVE™ Platform
Pexa-Vec is the most advanced product candidate from SillaJen's proprietary SOLVE™ (Selective Oncolytic Vaccinia Engineering) platform. The vaccinia strain backbone of Pexa-Vec has been used safely in millions of people as part of a worldwide vaccination program, and over 300 cancer patients have been treated with Pexa-Vec to date. Pexa-Vec was engineered to target common genetic defects in cancer cells by deleting their thymidine kinase (TK) gene, thus making Pexa-Vec dependent on the cellular TK expressed at persistently high levels in cancer cells. Pexa-Vec is also engineered to express granulocyte-macrophage colony stimulating factor (GM-CSF) protein. GM-CSF complements the cancer cell lysis of the product candidate, leading to a cascade of events resulting in tumor necrosis, tumor vasculature shutdown and sustained anti-tumoral immune attack. Pexa-Vec has been shown to be effective when delivered both intratumorally and systemically by intravenous administration. Pexastimogene devacirepvec (Pexa-Vec) is currently being evaluated in a worldwide Phase 3 clinical trial for advanced primary liver cancer, and more information can be found at:

About SillaJen
SillaJen, Inc. is a South Korean based biotechnology company headquartered in Busan South Korea, with satellite offices in Seoul, South Korea and San Francisco, CA.  The company is focused on the development and commercialization of oncolytic immunotherapy products using the SOLVE™ platform, including its lead product Pexa-Vec, which is currently in Phase 3 trials for the treatment of advanced primary liver cancer. Additional information about SillaJen is available at

Disclaimer Language:
This press release contains certain forward-looking statements regarding, among other things, statements relating to goals, plans and projections regarding the Company's financial position, results of operations, market position, product development and business strategy. Such forward-looking statements are based on current expectations and involve inherent risks and uncertainties, including factors that could delay, divert or change any of them, and could cause actual outcomes and results to differ materially from current expectations. No forward-looking statements can be guaranteed, and actual results may differ materially from such statements. The information in this release is provided only as of the date of this release, and SillaJen undertakes no obligation to update any forward-looking statements contained in this release on account of new information, future events, or otherwise, except as required by law.

Editor's Details

Mike Wood

Last updated on: 24/06/2018

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