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Codiak Initiates Patient Dosing in Phase 1 Clinical Trial of exoASO™-STAT6 in Patients with Advanced Hepatocellular Carcinoma, Liver Metastases from Primary Gastric Cancer and Colorectal Cancer

·5-min read
Codiak BioSciences, Inc.
Codiak BioSciences, Inc.

exoASO-STAT6 is the third engineered exosome candidate generated from Codiak’s engEx® Platform to enter clinical development

CAMBRIDGE, Mass., June 29, 2022 (GLOBE NEWSWIRE) -- Codiak BioSciences, Inc. (NASDAQ: CDAK), a clinical-stage biopharmaceutical company pioneering the development of exosome-based therapeutics as a new class of medicines, today announced the initiation of patient dosing in its Phase 1 clinical trial of exoASO-STAT6, an engineered exosome precision medicine candidate designed to selectively deliver antisense oligonucleotides to disrupt STAT6 signaling in tumor associated macrophages (TAMs) and induce an anti-tumor immune response. exoASO-STAT6 is Codiak’s third clinical program and the first to evaluate a systemically administered exosome-based drug candidate.

“Targeting macrophages is the next great frontier in cancer immunotherapy and we are encouraged by the monotherapy anti-tumor activity exhibited by exoASO-STAT6 in preclinical models, which has not been observed among other approaches to date. We believe this may indicate the potential to bring transformative treatments to patients facing intractable forms of cancer,” said Douglas E. Williams, Ph.D., CEO, Codiak. “The initiation of this trial is also a significant milestone for our company, as the advancement of exoASO-STAT6 into the clinic highlights the versatility of our engineering platform. This candidate is the first of our programs to target macrophages, the first to carry a nucleic acid and the first to be administered intravenously.”

The Phase 1 clinical trial will evaluate the safety, tolerability, biomarkers and preliminary anti-tumor activity of exoASO-STAT6 in patients with advanced hepatocellular carcinoma (HCC), patients with liver metastases from primary gastric cancer and colorectal cancer (CRC). The study is anticipated to enroll patients across four cohorts at sequentially escalating dose levels, with subjects in the initial cohorts receiving biweekly exoASO-STAT6 administered intravenously over the course of 28 days. Ultimately the trial may enroll up to 30 patients. Initial Phase 1 data are expected in the first half of 2023.

TAMs promote tumor growth by exhibiting an immune suppressive M2 phenotype. Reprogramming TAMs toward a pro-inflammatory M1 phenotype may be a compelling approach to induce anti-tumor immunity. The M2 phenotype is controlled by key transcription factors such as STAT6, which have proven difficult to drug selectively in TAMs using prior approaches. Codiak plans to initially develop exoASO-STAT6 for primary cancers of the liver, where STAT6 expression has been correlated with poor survival.

In multiple in vivo preclinical studies, exoASO-STAT6 demonstrated potent single agent activity, including >90% tumor growth inhibition and 50-80% complete responses. In HCC models, exoASO-STAT6 induced significant knockdown of STAT6 mRNA, attenuated tumor growth and induced complete remission of tumor lesions in 50% of mice. This anti-tumor activity was enhanced (75% complete remissions) when exoASO-STAT6 was administered with anti-PD1 antibodies. The monotherapy activity was accompanied by remodeling of the tumor microenvironment including significant expansion of M1-like macrophages and induction of an adaptive anti-tumor immune response, enabling tumor elimination.

About the engEx® Platform
Codiak’s proprietary engEx Platform is designed to enable the development of engineered exosome therapeutics for a wide spectrum of diseases and to manufacture them reproducibly and at scale to pharmaceutical standards. By leveraging the inherent biology, function and tolerability profile of exosomes, Codiak is developing engEx exosomes designed to carry and protect potent drug molecules, provide selective delivery and elicit the desired pharmacology at the desired tissue and cellular sites. Through its engEx Platform, Codiak seeks to direct tropism and distribution by engineering exosomes to carry on their surface specific targeting drug moieties, such as proteins, antibodies/fragments, and peptides, individually or in combination. Codiak scientists have identified two exosomal proteins that serve as surface and luminal scaffolds. By engineering the exosome surface or lumen and optimizing the route of administration, Codiak aims to deliver engEx exosomes to the desired cell and tissue to more selectively engage the drug target, potentially enhancing the therapeutic index by improving potency and reducing toxicity.

About Codiak BioSciences
Codiak is a clinical-stage biopharmaceutical company pioneering the development of exosome-based therapeutics, a new class of medicines with the potential to transform the treatment of a wide spectrum of diseases with high unmet medical need. By leveraging the biology of exosomes as natural intercellular transfer mechanisms, Codiak has developed its proprietary engEx Platform to expand upon the innate properties of exosomes to design, engineer and manufacture novel exosome therapeutic candidates. Codiak has utilized its engEx Platform to generate a deep pipeline of engineered exosomes aimed at treating a broad range of diseases, spanning oncology, neuro-oncology, infectious disease and rare disease. For more information, visit http://www.codiakbio.com and follow @CodiakBio.

Forward-Looking Statements
This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, including, among other things, statements concerning the development and therapeutic potential of exoASO-STAT6, including timing of release of data, and statements regarding the capabilities and potential of Codiak’s engEx Platform and engineered exosomes generally. Any forward-looking statements in this press release are based on management’s current expectations of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. For a discussion of these risks and uncertainties, and other important factors, any of which could cause our actual results to differ from those contained in the forward-looking statements, see the section entitled “Risk Factors” in Codiak’s Annual Report on Form 10-K for the year ended December 31, 2021, and in subsequent filings with the Securities and Exchange Commission, as well as discussions of potential risks, uncertainties and other important factors in Codiak’s subsequent filings with the Securities and Exchange Commission. All information in this press release is current as of the date of this report, and Codiak undertakes no duty to update this information unless required by law.

Investor Contact:
Christopher Taylor
VP, Investor Relations and Corporate Communications
T: 617-949-4220
E: investor@codiakbio.com

Media Contact:
Cory Tromblee
Scient PR
E: media@codiakbio.com


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