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Hildegard Büning

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Editorial Open access Jul 2026

The German National Strategy for Gene- and Cell-Based Therapies: Generating Impact by Employing a Novel Multi-Stakeholder Approach

Gene- and cell-based therapies (GCTs) represent a disruptive and transformative class of biomedical innovations. They address diseases by adding, removing, repairing, or replacing genes and/or by endowing distinct living cells with additional biological functions. Through this plethora of options, numerous conditions—including genetic disorders, cancers, and degenerative diseases—have become potential targets for a curative therapy. Thus, GCTs are considered the “Future of Medicine” as they (i) offer a potential cure, particularly for rare and severe disorders previously considered untreatable, (ii) expand the treatment options for common diseases, and (iii) possess the possibility to complement currently applied conventional treatment options. Recognizing both the scientific promise and translational challenges of GCTs, Germany has launched a coordinated national initiative—the National Strategy for Gene- and Cell-Based Therapies. The Strategy was commissioned by the German Federal Ministry of Research, Technology and Space (BMFTR, formerly the German Federal Ministry of Education and Research [BMBF]) and developed through a multi-stakeholder process. The latter involved more than 150 experts from academia, industry, health care sector, professional associations, and patient organizations, who were nominated by the community and assembled into eight working groups to identify current roadblocks and propose possible solutions. Summarized in the Strategy Paper, which was submitted to the BMFTR and published on June 12, 2024, a comprehensive roadmap was developed in this bottom-up process to accelerate the development and clinical implementation of GCTs in Germany. Although it initially had a national focus, the resulting framework is increasingly contributing to the international GCT landscape through growing exchange with GCT initiatives launched in other European member states and with the European Society of Gene and Cell Therapy (ESGCT). In brief, the initiative is focusing on translation starting from research through all steps to clinical application and beyond. This includes workforce development, regulatory frameworks, manufacturing capacity, patient access, and communication with the general public. Numerous targeted measures have been developed by the participating experts in the working groups and are currently being implemented in this broad, collaborative, and bottom-up multi-stakeholder approach. They encompass, for example, the establishment of a website as central information platform, including the GCT-Atlas, a web-based networking and information tool for stakeholders and actors in the GCT field, tailored communication and outreach formats, a Regulatory Support Unit providing independent regulatory guidance for publicly funded early-stage, nonclinical product development, different funding and entrepreneurship programs offering researchers and clinicians financial, educational, and mentoring support, as well as the establishment of translational infrastructure and exchange formats with investors to specifically foster the necessary scale-up and commercialization. Overall, the main goal of the German National Strategy for GCT is to ensure patient access to advanced therapies while strengthening Germany’s position as an international hub for biomedical innovation. To accomplish this, existing resources need to be coordinated, streamlined, and prioritized to increase efficiency and support the long-term sustainability of the system. These objectives are closely aligned with current emerging European initiatives, including the EU Biotech Act and the Horizon Europe work program 2026, which aim to further optimize the framework conditions for this strategically important field and enhance future European competitiveness.

Christian Gallus, F. Ayuk, P. Beckhove et al. · 0 citations
Jul 2026

Dichotomies in Ex Vivo and In Vivo Performance of Receptor-Binding Mutants of Adeno-Associated Virus Vectors

Receptor engagement plays a key role in the cellular uptake, intracellular trafficking, and overall transduction efficiency of adeno-associated virus (AAV) vectors. Although heparan sulfate proteoglycan (HSPG) and α5ß1 integrin-binding motifs of the AAV serotype 2 (AAV2) capsid were mapped, it has remained incompletely understood how loss of these interactions affects AAV vector performance. Hence, we generated capsid variants harboring mutations at capsid residues responsible for HSPG binding (AAV2ΔHSPG), α5ß1 integrin binding (AAV2ΔIntegrin), or both (AAV2ΔHSPGΔIntegrin), and investigated the mutants systematically ex vivo and in vivo. While neither production nor packaging efficiency was affected, variants revealed distinct physicochemical alterations, including altered electrophoretic mobility and thermal stability. Ex vivo, loss of HSPG binding completely abolished transgene expression across various cell lines, whereas ablation of α5ß1 integrin binding lowered transduction efficiency. While cellular uptake was reduced for AAV2ΔIntegrin and almost eliminated for AAV2ΔHSPG and AAV2ΔHSPGΔIntegrin, mutants nevertheless reached the nuclear compartment, albeit with lower efficiency compared with AAV2. Strikingly, in vivo performance diverged sharply from ex vivo findings as we observed a substantially enhanced transduction in multiple non-hepatic tissues for AAV2ΔHSPG and AAV2ΔHSPGΔIntegrin in C57BL/6N albino and BALB/c mice, as well as a strong liver detargeting, while AAV2ΔIntegrin was non-infectious in vivo. These data uncover a fundamental dichotomy between ex vivo and in vivo determinants of AAV2 transduction and identify receptor-binding ablation, especially integrin binding, as a potential alternative to detarget AAV2 vectors for next-generation capsid engineering and tissue-specific retargeting.

Olaniyi Olarewaju, Martin Bentler, Jacqueline Breuer et al. · 0 citations