Biocytogen Enters Collaboration with ABL Bio to Develop New Bispecific Antibody-Drug Conjugates

BEIJING–(BUSINESS WIRE)–#ADC–Biocytogen Pharmaceuticals (Beijing) Co., Ltd. (“Biocytogen”, HKEX: 02315), a global biotechnology company that drives the research and development of novel antibody-based drugs with innovative technologies, and ABL Bio Inc. (“ABL”, KOSDAQ: 298380), a Korean clinical-stage biotechnology company developing novel therapeutics in oncology and CNS diseases, today announced a collaboration to develop new bispecific antibody-drug conjugates (bsADCs).

Biocytogen’s RenLite® mice platform can produce fully human antibodies with diverse epitopes and high affinity. This platform is notable for its ability to generate antibodies in a common light chain format, offering a distinctive combination of design flexibility, simplified manufacturing processes, and optimal developability for bsADC development. Based on this platform, both companies will be able to discuss expanding their collaboration for various types of ADC development.

Dr. Yuelei Shen, President and CEO of Biocytogen, said, “We are very pleased to collaborate with ABL, a company that possesses advanced platforms for cancer immunotherapy and treatments against CNS diseases. ABL’s consistent success in advancing its pipeline strongly showcases its expertise and capabilities in regulatory, clinical development, and business development activities. BsADC drugs derived from our RenLite® mice platform have shown preferable potency in various tumor models, while also exhibiting good safety profiles. We believe our fully human bsADC platform technology, which features increased tumor selectivity, target synergized internalization, and convenient CMC development, will complement ABL’s capabilities effectively. Together, we aim to expedite the development of innovative bsADC therapies.”

Sang Hoon Lee, CEO of ABL, said, “We are excited to establish this partnership with Biocytogen for bsADCs. This collaboration is one of the stepping stones for getting down to developing bsADCs. We look forward to a productive collaboration, and firmly believe that this partnership will contribute towards creating a distinctive pipeline, ultimately leading to novel therapies that improve the quality of life for patients.”

About Biocytogen

Biocytogen (HKEX: 02315) is a global biotechnology company that drives the research and development of novel antibody-based drugs with innovative technologies. Founded on gene editing technology, Biocytogen leverages genetically engineered proprietary RenMice® (RenMabTM/RenLite®/RenNano®/RenTCR-mimicTM) platforms for fully human monoclonal/bispecific/multispecific antibody discovery, bispecific antibody-drug conjugate discovery, nanobody discovery and TCR-mimic antibody discovery, and has established a sub-brand, RenBiologicsTM, to explore global partnerships for an off-the-shelf library of >400,000 fully human antibody sequences against approximately 1000 targets for worldwide collaboration. As of June 30, 2023, 50 therapeutic antibody and multiple clinical asset co-development/out-licensing/transfer agreements and 42 target-nominated RenMice® licensing projects have been established around the globe, including several partnerships with multinational pharmaceutical companies (MNCs). Biocytogen pioneered the generation of drug target knock-in humanized models for preclinical research, and currently provides a few thousand off-the-shelf animal and cell models under the company’s sub-brand, BioMiceTM, along with preclinical pharmacology and gene-editing services for clients worldwide. Headquartered in Beijing, Biocytogen has branches in China (Haimen Jiangsu, Shanghai), USA (Boston, San Francisco), and Germany (Heidelberg). For more information, please visit http://en.biocytogen.com.cn.

About ABL Bio

ABL Bio Inc. (KOSDAQ: 298380) is a clinical-stage biotechnology company developing antibody therapeutics for immune-oncology and neurodegenerative diseases. With internal R&D and global partnerships, ABL has developed multiple BsAb platforms, such as ‘Grabody-T,’ ‘Grabody-B’ and built an innovative pipeline of multiple clinical and pre-clinical stage drug candidates. In the oncology area, we have developed Grabody-T, a modular 4-1BB engaging platform that has demonstrated superior efficacy and safety. In the neurodegenerative disorder space, we have developed Grabody-B, which is designed to maximize blood-brain barrier (BBB) penetration. Grabody-B is applicable to various CNS targets across a plethora of neurological disorders, potentially providing a breakthrough to address the high unmet medical needs in neurodegeneration. For more information, please visit www.ablbio.com.

Contacts

Biocytogen Contacts
Antibody assets and platforms: BD-Licensing@biocytogen.com
Media: pr@bbctg.com.cn

Alpha Cancer Technologies (ACT) Publishes Pre-Clinical Study Results in Cancer Cell International Demonstrating Excellent Safety and Significant Anti-Tumor Activity from the Company’s Next Generation ADC, ACT-903

Alpha Cancer Technologies (ACT) Publishes Pre-Clinical Study Results in Cancer Cell International Demonstrating Excellent Safety and Significant Anti-Tumor Activity from the Company’s Next Generation ADC, ACT-903




Alpha Cancer Technologies (ACT) Publishes Pre-Clinical Study Results in Cancer Cell International Demonstrating Excellent Safety and Significant Anti-Tumor Activity from the Company’s Next Generation ADC, ACT-903

ACT-903 conjugate demonstrated significant anti-tumor activity, with tumors becoming undetectable in 9 of 10 mice, and all 10 mice surviving through Day 60 with no obvious signs of toxicity

ACT’s technology highlights the potential to use the natural function of AFP as a carrier protein to deliver a payload uniquely targeted to cancer cells, while reducing risk of immune reactions or anti-drug antibody accumulation

Alpha fetoprotein conjugates had a very low percentage of free toxin detectable in blood after administration, and did not show any bone marrow accumulation of cytotoxic payload, suggesting limited off-target toxicity

TORONTO–(BUSINESS WIRE)–#ACT903–Alpha Cancer Technologies Inc. (ACT), a biopharmaceutical company focused on developing and commercializing targeted immuno-oncology and immunomodulation therapies based on its proprietary recombinant human Alpha Fetoprotein (AFP) platform, today announced the publication of pre-clinical study results in Cancer Cell International highlighting the company’s recombinant human AFP (ACT-101) conjugate with maytansine in mouse xenograft models of colorectal cancer. Results from the study demonstrate the exceptional safety profile and potent anti-tumor activity of multiple ACT-101 conjugates through the successful targeting of the alpha fetoprotein receptor uniquely located on cancerous cells and myeloid-derived suppressor cells (MDSCs).

The AFP receptor has been found on the surface of cancer cells and MDSCs exclusively, making it an attractive target for the delivery of toxins selectively to tumor cells and MDSCs. Human AFP acts as a shuttle protein, transporting a variety of molecules including targeted anti-cancer agents inside the cell via the AFP receptor. ACT-101 is a recombinantly produced non-glycosylated form of human AFP, which will carry and deliver maytansine and other chemotherapy payloads to tumor cells via the AFP receptor. The selection of maytansine was based on its prior efficacy in clinical studies when incorporated into ADCs.

The AFP receptor has emerged as a novel target for cancer therapeutics given the expression of AFP on most cancers and MDSCs, and lack of presence on normal tissues. Studies were performed to investigate the use of ACT-101 conjugated with maytansine for targeted toxin delivery to cancer. Four structurally different ACT-101-maytansinoid conjugates containing cleavable glutathione sensitive linkers were initially investigated in a mouse xenograft model of colorectal cancer (COLO-205). Reduction in tumor volume was seen for all four conjugates compared to control (p < 0.05). The anti-tumor effects of the conjugate selected for further development, ACT-903, persisted after treatment discontinuation, with tumors becoming undetectable in 9 of 10 mice, and all 10 mice surviving through Day 60 with no obvious signs of toxicity. A follow-up study performed in the same model compared the effects of single intravenous doses of ACT-903 (10–50 mg/kg) to control groups receiving vehicle or ACT-101. A significant reduction of tumor burden compared to control was achieved in the 40 and 50 mg/kg dose groups. Survival was also significantly prolonged in the 40 mg/kg and 50 mg/kg cohorts. Free maytansine blood levels at 4 hours were 0.008% of the dose, indicating stability in circulation as was expected based on in vitro plasma stability studies. No obvious signs of toxicity were seen in any of the treated groups. The observed efficacy and excellent tolerability of ACT-903 in these xenograft models support advancing the development of ACT-903 into clinical studies.

“Based on the evidence we continue to observe in our pre-clinical studies, we believe ACT-903 has the potential to address the limitations of current-generation antibody drug conjugates through a targeted delivery exclusively to cancer and immune suppressor cells, allowing for greater efficacy with minimal toxicity,” said Dr. Igor Sherman, CEO of ACT. “Given the broad range of cancer cells expressing the AFP receptor, we believe our technology offers a potential pan-cancer opportunity and we look forward to continuing the development of this program to bring it to cancer patients in the shortest possible time.”

The manuscript, titled “High anti-tumor activity of a novel alpha-fetoprotein-maytansinoid conjugate targeting alpha-fetoprotein receptors in colorectal cancer xenograft model,” was published in Cancer Cell International on April 5, 2023 and the full manuscript can be accessed here.

About Alpha Cancer Technologies, Inc.

Alpha Cancer Technologies Inc., (ACT) is a private clinical stage biotechnology company with immuno-oncology, theranostics and immunomodulation platforms under development. The company’s drug products use ACT’s patented recombinant human alpha fetoprotein (AFP or ACT-101). ACT’s immuno-oncology products target AFP receptors uniquely expressed on almost all solid and liquid tumors and immune suppressor cells but are absent on normal cells. This approach utilizes next-generation ADC technology and offers the benefits of much lower toxicity and greater efficacy compared to conventional chemotherapy and other targeted therapies. ACT is based in Toronto, Ontario, Canada. For more information, please visit www.alpha-cancer.com

Contacts

Richard Potts, Chair

Alpha Cancer Technologies Inc.
Tel: +1 (416) 464-2678

Email: rpotts@alpha-cancer.com

Igor Sherman, Ph. D., President & CEO

Alpha Cancer Technologies Inc.
Tel: +1 (416) 826-6626

Email: isherman@alpha-cancer.com

For investors, please contact:
Stephen Jasper

Gilmartin Group
Tel: +1 (858) 525-2047

Email: stephen@gilmartinir.com

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