JCR Pharmaceuticals Presents Preclinical Gene Therapy Data that Demonstrate Promising CNS Uptake at American Society of Gene and Cell Therapy
HYOGO, Japan--(BUSINESS WIRE)-- JCR Pharmaceuticals Co., Ltd. (TSE 4552; 'JCR') announced today that the Company presented preclinical data from its novel adeno-associated virus (AAV) gene therapy research programs at the American Society of Gene and Cell Therapy (ASGCT) 28 th Annual Meeting, being held May 13-17, 2025, in New Orleans, LA. In an oral presentation, the JCR researcher reported that the Company's proprietary J-Brain Cargo ® (JBC) technology enables the efficient delivery of an adeno-associated virus (AAV) gene therapy across the blood-brain barrier (BBB) and into the central nervous system (CNS) in mice, monkeys, and several animal models of CNS diseases.
We have successfully developed JUST-AAV, a novel AAV vector platform technology designed to enhance targeted delivery and reduce liver tropism, thereby improving safety and efficacy of AAV-based gene delivery technologies to the CNS. JUST-AAV encompasses a range of vector types optimized for various target tissues, including liver-sparing, muscle-targeting, and brain-targeting variants. This proprietary technology holds significant promise for advancing the field of AAV-based gene therapy.
'These findings represent a significant advancement toward new treatments for previously challenging CNS diseases,' said Hiroyuki Sonoda, Ph.D., Director, Senior Managing Executive Officer, and Executive Director, Research Division at JCR Pharmaceuticals. 'Our preclinical data demonstrate that our brain-targeting JUST-AAV technology delivers therapeutic agents to the central nervous system far more efficiently than conventional AAV9, while significantly reducing liver accumulation. This enhanced safety profile greatly increases the potential for clinical translation. This research is a crucial step in our ongoing commitment to developing innovative solutions for unmet medical needs.'
JCR showcased the following presentation:
Incorporation of transferrin receptor binder and surface mutations into AAV enables efficient brain delivery and reduced liver tropism
Presenter: Yuhei Ashida (JCR Pharmaceuticals)
Researchers successfully created a brain-targeting AAV vector (brain-targeting JUST-AAV) by incorporating a miniaturized antibody that binds to the transferrin receptor, into the AAV capsid. Furthermore, unique modifications to the AAV capsid sequence significantly reduced AAV vector accumulation in the liver, a known source of adverse effects. In mouse studies, the JUST-AAV vector achieved 77-fold higher expression of green fluorescent protein (GFP) in the brain compared to AAV9, while reducing the tropism to the liver by 99%. To further enhance brain targeting and BBB permeability, the researchers incorporated additional molecules that bind to receptors other than the transferrin receptor into the AAV capsid. In monkey studies, this bispecific vector demonstrated an improved gene delivery efficiency to the brain by several orders of magnitude compared with AAV9, while reducing infection in potentially problematic tissues such as the liver and dorsal root ganglia by more than 90%.
Application of JUST-AAV to a mouse model of neuronal ceroid lipofuscinosis resulted in the disappearance of symptoms such as seizures and prolonged lifespan to an extent of a functional cure. These results suggest that the newly developed JUST-AAV technology offers the potential for safer and more efficient gene therapy than conventional gene delivery vectors.
About the American Society of Gene and Cell Therapy (ASGCT)
The American Society of Gene and Cell Therapy (ASGCT) is the primary professional membership organization for gene and cell therapy. The Society's members are scientists, physicians, patient advocates, and other professionals. The mission of the ASGCT is to advance knowledge, awareness, and education, leading to the discovery and clinical application of genetic and cellular therapies to alleviate human disease. For more information, please visit www. asgct.org.
About the J-Brain Cargo ® Platform Technology
JCR Pharmaceuticals has developed a proprietary blood-brain barrier (BBB)-penetrating technology, J-Brain Cargo ®, to bring biotherapeutics into the central nervous system (CNS). The first drug developed based on this technology is IZCARGO ® (INN: pabinafusp alfa) and was approved in Japan for the treatment of a lysosomal storage disorder.
JUST-AAV
JUST-AAV is a proprietary platform technology that utilizes modified adeno-associated virus (AAV) vectors. The technology entails insertion of miniaturized antibodies against receptors on selected tissues, organs or the blood-brain barrier onto the capsid surface, enhancing targeted delivery to those tissues and organs. Further capsid modifications minimize off-target effects and improve safety. The name is derived from ' J CR' ' U ltimate destination of organ' ' S afeguarding against off-target delivery' and ' T ransformative technology' reflecting its potential for broad application across various diseases.
About JCR Pharmaceuticals Co., Ltd.
JCR Pharmaceuticals Co., Ltd. (TSE 4552) is a global specialty pharmaceuticals company that is expanding possibilities for people with rare and genetic diseases worldwide. We continue to build upon our 50-year legacy in Japan while expanding our global footprint into the US, Europe, and Latin America. We improve patients' lives by applying our scientific expertise and unique technologies to research, develop, and deliver next-generation therapies. Our approved products in Japan include therapies for the treatment of growth disorder, MPS II (Hunter syndrome), Fabry disease, acute graft-versus host disease, and renal anemia. Our investigational products in development worldwide are aimed at treating rare diseases including MPS I (Hurler, Hurler-Scheie and Scheie syndrome), MPS II, MPS IIIA and B (Sanfilippo syndrome type A and B), and more. JCR strives to expand the possibilities for patients while accelerating medical advancement at a global level. For more information, please visit https://www.jcrpharm.co.jp/en/site/en/index.html.
Cautionary Statement Regarding Forward-Looking Statements
This document contains forward-looking statements that are subject to known and unknown risks and uncertainties, many of which are outside our control. Forward-looking statements often contain words such as 'believe,' 'estimate,' 'anticipate,' 'intend,' 'plan,' 'will,' 'would,' 'target' and similar references to future periods. All forward-looking statements regarding our plans, outlook, strategy and future business, financial performance and financial condition are based on judgments derived from the information available to us at this time. Factors or events that could cause our actual results to be materially different from those expressed in our forward-looking statements include, but are not limited to, a deterioration of economic conditions, a change in the legal or governmental system, a delay in launching a new product, impact on competitors' pricing and product strategies, a decline in marketing capabilities relating to our products, manufacturing difficulties or delays, an infringement of our intellectual property rights, an adverse court decision in a significant lawsuit and regulatory actions.
This document involves information on pharmaceutical products (including those under development). However, it is not intended for advertising or providing medical advice. Furthermore, it is intended to provide information on our company and businesses and not to solicit investment in securities we issue.
Except as required by law, we assume no obligation to update these forward-looking statements publicly or to update the factors that could cause actual results to differ materially, even if new information becomes available in the future.
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Ipsen is listed in Paris (Euronext: IPN) and in the U.S. through a Sponsored Level I American Depositary Receipt program (ADR: IPSEY). For more information, visit Ipsen Media contacts Investors Khalid Deojee | +33 666019526 | [email protected] Media Disclaimers and/or Forward-Looking Statements The forward-looking statements, objectives and targets contained herein are based on Ipsen's management strategy, current views and assumptions. Such statements involve known and unknown risks and uncertainties that may cause actual results, performance or events to differ materially from those anticipated herein. All of the above risks could affect Ipsen's future ability to achieve its financial targets, which were set assuming reasonable macroeconomic conditions based on the information available today. Use of the words 'believes', 'anticipates' and 'expects' and similar expressions are intended to identify forward-looking statements, including Ipsen's expectations regarding future events, including regulatory filings and determinations. Moreover, the targets described in this document were prepared without taking into account external-growth assumptions and potential future acquisitions, which may alter these parameters. These objectives are based on data and assumptions regarded as reasonable by Ipsen. These targets depend on conditions or facts likely to happen in the future, and not exclusively on historical data. Actual results may depart significantly from these targets given the occurrence of certain risks and uncertainties, notably the fact that a promising medicine in early development phase or clinical trial may end up never being launched on the market or reaching its commercial targets, notably for regulatory or competition reasons. Ipsen must face or might face competition from generic medicine that might translate into a loss of market share. Furthermore, the research and development process involves several stages each of which involves the substantial risk that Ipsen may fail to achieve its objectives and be forced to abandon its efforts with regards to a medicine in which it has invested significant sums. Therefore, Ipsen cannot be certain that favorable results obtained during preclinical trials will be confirmed subsequently during clinical trials, or that the results of clinical trials will be sufficient to demonstrate the safe and effective nature of the medicine concerned. There can be no guarantees a medicine will receive the necessary regulatory approvals or that the medicine will prove to be commercially successful. If underlying assumptions prove inaccurate or risks or uncertainties materialize, actual results may differ materially from those set forth in the forward-looking statements. Other risks and uncertainties include but are not limited to, general industry conditions and competition; general economic factors, including interest rate and currency exchange rate fluctuations; the impact of pharmaceutical industry regulation and healthcare legislation; global trends toward healthcare cost containment; technological advances, new medicine and patents attained by competitors; challenges inherent in new-medicine development, including obtaining regulatory approval; Ipsen's ability to accurately predict future market conditions; manufacturing difficulties or delays; financial instability of international economies and sovereign risk; dependence on the effectiveness of Ipsen's patents and other protections for innovative medicines; and the exposure to litigation, including patent litigation, and/or regulatory actions. Ipsen also depends on third parties to develop and market some of its medicines which could potentially generate substantial royalties; these partners could behave in such ways which could cause damage to Ipsen's activities and financial results. Ipsen cannot be certain that its partners will fulfil their obligations. It might be unable to obtain any benefit from those agreements. A default by any of Ipsen's partners could generate lower revenues than expected. Such situations could have a negative impact on Ipsen's business, financial position or performance. Ipsen expressly disclaims any obligation or undertaking to update or revise any forward-looking statements, targets or estimates contained in this press release to reflect any change in events, conditions, assumptions or circumstances on which any such statements are based, unless so required by applicable law. Ipsen's business is subject to the risk factors outlined in its registration documents filed with the French Autorité des Marchés Financiers. The risks and uncertainties set out are not exhaustive and the reader is advised to refer to Ipsen's latest Universal Registration Document, available on References 1 Wainberg et al. NALIRIFOX versus nab-paclitaxel and gemcitabine in treatment-naive patients with metastatic pancreatic ductal adenocarcinoma (NAPOLI 3): a randomised, open-label, phase 3 trial. Lancet. 2023 Oct 7;402(10409):1272-1281. 2 Chung et al. NAPOLI 3 phase 3 study of NALIRIFOX in patients with metastatic pancreatic ductal adenocarcinoma (mPDAC): final overall survival (OS) analysis and characteristics of the long-term survivors. As presented at ASCO Congress 2025 Chicago, USA 3 American Cancer Society – Cancer Facts and Figures 2024. Available : 4 5 Orth, M., Metzger, P., Gerum, S. et al. Pancreatic ductal adenocarcinoma: biological hallmarks, current status, and future perspectives of combined modality treatment approaches. Radiat Oncol 14, 141 (2019). Attachment Ipsen PR_ASCO NAPOLI_31052025 Disclaimer: The above press release comes to you under an arrangement with GlobeNewswire. Business Upturn takes no editorial responsibility for the same.
