BIOCYTOGEN
Biocytogen Pharmaceuticals (Beijing) Co., Ltd. ("Biocytogen", HKEX: 02315) officially launched its fully human heavy chain antibody platform, RenNano®. RenNano® is the third member of the RenMice™ family, joining RenMab™ and RenLite®. Together, Biocytogen’s three RenMice™ platforms allow for the streamlined discovery and development of fully human monoclonal antibodies, bispecific/multispecific antibodies and single-domain antibodies (sdAbs, or nanobodies) (Figure 1).
While humans and mice generate antibodies that require heavy and light chain pairing to be functional, camels and sharks generate heavy-chain-only antibodies (HCAb), meaning their variable domains (VHH or sdAb) can function without pairing with the light chain. Owing to their nanometer-level size and small molecular weight, sdAbs have superior permeability, and thus can cross the blood-brain barrier and infiltrate solid tumor tissues. In addition, the longer CDR3 region enables sdAbs to detect the otherwise hidden epitopes of GPCRs and other challenging targets. Since sdAbs have a simple structure, they are ideal building blocks for assembling bispecific/multispecific antibodies and CAR cell therapies.
While nanobodies have its unique advantages, animals that naturally produce HCAbs, such as camels, are difficult to be widely used for the preparation of monoclonal antibodies because they are large, having a long breeding cycle and generate few offspring. Meanwhile, humanization is required to develop camelid antibody sequences into drugs, which further increases the complexity and time of drug development.
To overcome these challenges, Biocytogen engineered the RenNano® mouse by modifying the constant region of the fully human RenMab™ model to allow for HCAb production. Compared with other existing HCAb platforms, the in situ replacement of the mouse genes with the complete human heavy chain variable genes makes the RenNano® mouse one of the most comprehensive fully human antibody platforms in the world. SdAb sequences generated from RenNano® mice have the highest possible diversity, and do not require antibody humanization, which saves time and cost, and reduces risk of failure during later stages of drug development. Additionally, compared with camelids or other natural HCAb-producing species, mice are easier to breed and immunize. Immunization of RenNano® mice can generate HCAbs with diverse CDR3 sequences that recognize a variety of epitopes. These HCAbs can recognize antigens with nM-level affinity independent of light chains. Moreover, antibodies derived from RenNano® mice are capable of exerting biological functions both in vitro and in vivo. They are highly hydrophilic and have favorable developability characteristics.
The successful development of the RenNano® platform expands Biocytogen’s capabilities for antibody discovery and broadens the applications of our antibody library. We welcome global partners to realize the full potential of our RenMice™ platforms and derive antibodies to generate novel therapeutics.
About RenMice
RenMice™, i.e., RenMab™, RenLite® and RenNano® mice, which have proprietary intellectual property rights, were developed by Biocytogen over the course of 5 years using size-unlimited, precise chromosome engineering technology (SUPCE). RenMice™ is one of the top 3 fully human antibody mice made by in situ replacement technology globally. All RenMice™ members contain full human heavy chain VDJ loci replaced in situ. Regarding antibody κ light chains, RenMab™ mouse contains full human VJ loci replaced in situ and RenLite® mouse contains a single human VJ locus replaced in situ. RenNano® mouse has modified heavy chain constant regions to generate functional heavy-chain-only antibodies (HCAbs).
RenMice™ can generate robust immune response and produce fully human antibodies with great diversity, specificity, affinity and druggability. Using RenMice™, Biocytogen has built 6 fully human antibody discovery platforms, covering various types of targets and modalities such as monoclonal antibody (RenMab™), bispecific antibody and bispecific ADC (RenLite®), nanobody (RenNano®), TCR-mimic antibody for intracellular targets (HLA/RenMice, humanized RenMice™), and antibody platform against GPCR and other challenging targets (RenMice™ knockouts).
RenMice™ has been recognized by top biopharmaceutical companies around the world, including Merck KGaA, Xencor, BeiGene, and Innovent.
About Biocytogen:
Biocytogen (HKEX: 02315) is a global biotechnology company that drives the research and development of novel antibody-based drugs with innovative technologies. Using its proprietary RenMab™/RenLite®/RenNano® mice platforms for fully human monoclonal antibody, bispecific/multispecific antibody and nanobody development, Biocytogen has integrated its in vivo drug efficacy screening platforms and strong clinical development expertise to streamline the entire drug development process. Biocytogen is undertaking a large-scale project to develop first-in-class and/or best-in-class antibody drugs for more than 1000 targets, known as Project Integrum. This project has resulted in 28 drug co-development agreements and 16 RenMice™ licensing agreements with companies around the world, including several partnerships with multinational pharmaceutical companies (MNCs). Biocytogen's pipeline includes 12 core products, among which two products are in phase II multi-regional clinical trials and two products are in phase I. Headquartered in Beijing, Biocytogen has branches in Haimen Jiangsu, Shanghai, Boston, USA and Heidelberg, Germany. For more information, please visit http://en.biocytogen.com.cn.
To view this piece of content from cts.businesswire.com, please give your consent at the top of this page.
View source version on businesswire.com: https://www.businesswire.com/news/home/20230105005963/en/
About Business Wire
Subscribe to releases from Business Wire
Subscribe to all the latest releases from Business Wire by registering your e-mail address below. You can unsubscribe at any time.
Latest releases from Business Wire
From Pilots to Profit: NTT DATA's 2026 Global AI Report Shows How Top Performers Turn AI Vision Into Value8.12.2025 14:00:00 CET | Press release
Study reveals how the top 15% of companies are 2.5x more likely to post >10% revenue growth and over 3x more likely to achieve ≥15% profit margins from AI deployments NTT DATA, a global leader in AI, digital business and IT services, today released the 2026 Global AI Report: A playbook for AI leaders. The playbook is based on the company’s new benchmark research and reveals how “AI leaders” are separating from competitors through strategy and execution. The analysis is based on a survey of 2,567 senior executives across 35 countries and 15 industries. Only 15% of participating organizations qualified as “AI leaders,” defined by clear AI strategies, mature operating models and focused execution. These leaders report significantly higher revenue growth and profit margins than other organizations. “AI accountability now belongs in the boardroom and demands an enterprise-wide agenda,” said Yutaka Sasaki, President and CEO, NTT DATA Group. “Our research shows that a small group of AI leader
AdvanCell Receives First Delivery of High-Activity Thorium-228, Highlighting a Unique Industry Capability and Expertise Essential to Scaling Lead-212 Production for Targeted Alpha Therapies8.12.2025 14:00:00 CET | Press release
Thorium-228 (228Th) is the parent isotope and key starting material to produce the alpha-emitter Lead-212 (212Pb) The established capability to receive and process high-activity 228Th, provides a key competitive advantage in scaling up 212Pb production to support the rapid advancement of 212Pb-ADVC001 (ADVC001) clinical development and the expanding pipeline The received 228Th will be processed into sources for our proprietary generator and installed in production systems first in Australia and subsequently in the US, as part of the planned expansion AdvanCell, a clinical-stage radiopharmaceutical company developing innovative targeted alpha therapies for cancer, today announced it has received the first delivery of high-activity 228Th, the parent isotope of 212Pb and a key starting material to produce the alpha-emitter 212Pb, used to manufacture ADVC001, the company’s lead asset, and other 212Pb-based radioligand therapies in the pipeline. This delivery marks a major milestone for the
BRUKINSA Delivers Landmark 74% 6-Year PFS in Patients with Treatment-Naïve Chronic Lymphocytic Leukemia8.12.2025 14:00:00 CET | Press release
Multiple long-term follow-up studies confirm BRUKINSA’s superior efficacy and favorable tolerability versus ibrutinib in relapsed or refractory CLLAdditional ASH data from investigational BTK degrader, BGB-16673, highlight potential first- and best-in-class activity with durable responses in heavily pretreated patients with CLL BeOne Medicines Ltd. (Nasdaq: ONC; HKEX: 06160; SSE: 688235), a global oncology company, reaffirms its position as the leader in chronic lymphocytic leukemia (CLL) innovation by showcasing the depth, quality, and momentum of its hematology portfolio at the 67th ASH Annual Meeting and Exposition in Orlando, Florida. The totality of BeOne’s ASH data reinforce BRUKINSA® (zanubrutinib) as the foundational Bruton’s tyrosine kinase inhibitor (BTKi) of choice. “At ASH 2025, we will present new data from across our CLL franchise, highlighting both the strength of BRUKINSA and the potential of BGB-16673,” said Amit Agarwal, M.D., Ph.D., Chief Medical Officer, Hematology,
Pink Changing Lives®: Mary Kay Builds 11th Preschool in Sri Lanka, Turning a Dream Into Thousands of New Beginnings8.12.2025 14:00:00 CET | Press release
Each year, Mary Kay supports causes that enrich millions of women’s lives globally, including access to education Mary Kay Inc., a global champion for women’s empowerment, is turning pink into purpose through its Pink Changing Lives® Program to raise awareness and funds to support life-changing programs advancing cancer research, support survivors of domestic violence, protect our planet’s most precious resources, and create opportunities that help women and their families thrive. Since 1996, the multi-faceted Pink Changing Lives® Program has donated over $230 million in monetary and in-kind donations to improve the lives of women and their families in communities around the world. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20251208554750/en/ Mary Kay Inc., a global champion for women’s empowerment, is turning pink into purpose through its Pink Changing Lives® Program to raise awareness and funds to support life-changing p
IonQ Expands in EU With Slovakia’s First National Quantum Communication Network8.12.2025 13:05:00 CET | Press release
Partnering with the Slovak Academy of Sciences, IonQ bolsters national security and European quantum communications infrastructure IonQ (NYSE: IONQ), the world’s leading quantum company, through its subsidiary ID Quantique (IDQ), today announced the deployment of Slovakia’s first national quantum communication network. Developed in partnership with the Institute of Physics, Slovak Academy of Sciences (IPSAS), the new system features a resilient hybrid architecture designed to strengthen the country’s cybersecurity infrastructure and support Europe’s quantum digital programs. The Slovak Quantum Communication Infrastructure (skQCI) project represents a major milestone in Slovakia’s contribution to the European Quantum Communication Infrastructure (EuroQCI) initiative, which seeks to establish a secure quantum-resistant communication backbone covering all European Union (EU) member states and territories. By integrating quantum-safe technologies at a national scale, Slovakia will directly
In our pressroom you can read all our latest releases, find our press contacts, images, documents and other relevant information about us.
Visit our pressroom