1. Introduction
For decades, anticancer drug development has followed a linear, siloed trajectory, from target identification and molecular screening to preclinical animal testing and sequential clinical evaluation.1 This fragmented pipeline has contributed to a persistently high attrition rate of nearly 90% for oncology candidates, a figure that has remained largely unchanged over the past two decades despite major advances in targeted therapy and immuno-oncology.2 The root cause of this inefficiency lies not solely in the biological complexity of the tumor microenvironment (TME), but in the systemic disconnection between stages of the translational pathway: molecular design is rarely informed by in vivo delivery performance, preclinical models poorly predict clinical outcomes, and therapeutic innovation often outpaces the regulatory and manufacturing frameworks required for clinical deployment.3
As cross-disciplinary integration becomes the defining feature of next-generation biomedicine, we argue that overcoming this translational deadlock requires moving beyond siloed, incremental innovation toward a fully integrated, systems-level therapeutic development framework.4 Such a framework emerges from the synergistic convergence of three core bioengineering pillars: Artificial intelligence (AI)-driven de novo molecular design and diagnostic intelligence, which enhance druggability and target specificity from the outset; synthetic biology-enabled intelligent living therapeutics, which enable precise spatiotemporal control of therapeutic activity in vivo; and nanotechnology-based advanced delivery systems, which overcome TME barriers to ensure targeted drug accumulation. These are complemented by microphysiological organ-on-a-chip platforms and AI digital twins that are reshaping preclinical and clinical validation, alongside adaptive regulatory pathways and automated Chemistry, Manufacturing, and Controls (CMC) processes that close the loop from bench to bedside.
In this paper, we not only highlight the latest advances across each bioengineering domain in addressing translational bottlenecks, but more importantly, we systematically examine the synergistic mechanisms that integrate these technologies, offer critical reflections on the limitations of current paradigms, and propose an actionable, end-to-end translational roadmap designed to accelerate the clinical adoption of next-generation anticancer therapeutics.
2. De novo design of small molecules and biomacromolecules for cancer therapy
The high attrition of anticancer drug candidates originates first from the inherent limitations of the traditional discovery paradigm.5 To address this root-cause bottleneck, algorithmic innovation represented by generative AI has inverted the linear trial-and-error model, enabling de novo design of therapeutic molecules with predefined druggable properties, which forms the foundational cornerstone of the integrated translational roadmap we propose.6
Traditional anticancer drug discovery relies on high-throughput screening of natural or synthetic compound libraries, a process that typically takes 3-5 years for lead optimization, is limited by the structural diversity of existing libraries, and consumes massive financial and human resources.7 In contrast, generative AI and deep machine learning enable the de novo design of therapeutics with programmable specificity and optimized pharmacodynamics, compressing lead optimization timelines from years to months.8 A milestone in this shift is the emergence of foundational biological models such as Evo 2, a DNA foundation model trained on 9.3 trillion nucleotides spanning diverse genomes. This scale of training enables the model to decode evolutionary patterns, predict pathogenic variants, and engineer de novo genetic sequences with tailored therapeutic functions.9
In protein and peptide engineering, models such as PepMimic have achieved notable advances by translating known protein-protein interaction interfaces into highly stable, target-specific peptide topologies.10 Such algorithmic strategies not only accelerate development timelines, but also expand the druggable landscape by targeting previously inaccessible protein interaction interfaces. Beyond biologics, generative AI has also accelerated the clinical entry of highly selective small molecules. A defining case is ISM3412, an orally bioavailable Methionine adenosyltransferase 2A inhibitor currently being evaluated in a global Phase 1 trial (NCT06414460). Designed to exploit synthetic lethality in methylthioadenosine phosphorylase (MTAP)-deleted solid tumors, ISM3412 was developed using a generative chemistry engine that rapidly optimized its structure for enhanced binding affinity and pharmacokinetic properties.11 Designed to exploit synthetic lethality in MTAP-deleted solid tumors, ISM3412 was developed using a generative chemistry engine that rapidly optimized its structure for enhanced binding affinity and pharmacokinetic properties, entering clinical trials only 18 months after target identification.
Currently, parallel progress in de novo protein design has expanded the repertoire of engineered modalities in clinical oncology. Innovations in the rational design of antibodies and other binding proteins have enabled the development of highly specific agents, such as antibody-drug conjugates (ADCs) and targeted protein degraders (TPDs). ADCs exemplify the power of protein engineering to combine the precise targeting of monoclonal antibodies with the potent cytotoxicity of small-molecule payloads, enabling selective tumor cell killing while minimizing systemic exposure. Similarly, TPDs harness the cell’s own degradation machinery to eliminate oncogenic proteins with catalytic efficiency, an approach that overcomes limitations of traditional occupancy-driven inhibition and expands the druggable proteome. Together, these two modalities underscore the expanding therapeutic utility of engineered proteins in precision oncology.12,13
Parallel advances in AI are reshaping clinical validation and patient stratification, a critical determinant of clinical trial success. The efficacy of targeted therapeutics is highly dependent on precise diagnostic characterization and cohort selection. One example is the nuclei.io digital pathology platform, which integrates human-in-the-loop active learning with real-time pathologist feedback. This platform markedly improves diagnostic accuracy and efficiency in detecting complex histopathological features, such as colorectal cancer metastasis in lymph nodes, enabling more precise patient stratification for clinical trials.14
Despite transformative progress, AI-driven drug development faces unresolved translational challenges. First, current generative AI models are mostly trained on publicly available data from successful preclinical and clinical studies, creating inherent survival bias that limits their ability to predict rare but severe off-target toxicities, a leading cause of clinical failure.15 Second, most AI-designed molecules to date are structural optimizations of known targets; their ability to develop de novo therapeutics for truly “undruggable” targets (e.g., transcription factors, non-enzymatic scaffold proteins) remains unproven in clinical settings.16 Third, there is still no AI-designed anticancer drug approved for marketing, and whether AI-generated candidates have a lower clinical attrition rate than those from traditional screening paradigms requires long-term, large-scale clinical validation.17 Finally, AI-driven diagnostic platforms face challenges in multi-center reproducibility and regulatory standardization, limiting their widespread adoption in global clinical trials.18
3. Synthetic biology-driven new anticancer drug development
While AI-driven rational design solves the problem of “what to deliver” by optimizing the structure and activity of therapeutic payloads, it cannot address the core challenge of “when and where to act” in the complex in vivo environment. This gap is precisely filled by synthetic biology, which endows therapeutic systems with autonomous, spatiotemporally controlled execution capabilities through genetic circuit engineering, bridging the gap between in silico design and in vivo efficacy.19
Conventional adoptive cell therapies, such as standard chimeric antigen receptor (CAR)-T cells, have achieved curative effects in hematological malignancies, but face substantial challenges in solid tumors and widespread clinical adoption, primarily due to severe “on-target, off-tumor” toxicities and heterogeneous tumor antigen expression.20 By incorporating principles of Boolean logic into living cells, bioengineers are now developing intelligent immune effectors endowed with autonomous decision-making capabilities.21
The clinical translational potential of this strategy was validated by interim Phase 1 results for SENTI-202, a first-in-class, off-the-shelf CAR-natural killer (NK) cell therapy granted Food and Drug Administration (FDA) Breakthrough Therapy designation and presented at the 2025 American Association for Cancer Research Annual Meeting. Traditional CD33-targeted CAR-T therapies for acute myeloid leukemia (AML) have shown clinical efficacy, but are limited by severe on-target, off-tumor toxicity against healthy hematopoietic stem cells, leading to prolonged myelosuppression and high treatment-related mortality. In contrast, SENTI-202’s dual-logic genetic circuit addresses two core limitations of conventional CAR-T simultaneously: an “OR” gate recognizing either CD33 or Fms-like tyrosine kinase 3 antigens to overcome tumor heterogeneity, coupled with a “NOT” gate targeting endomucin to actively spare healthy hematopoietic stem cells from immune-mediated destruction. This design enabled a 57% complete remission rate in patients with relapsed or refractory AML, with no dose-limiting toxicities observed (NCT06325748).
Beyond immune cell engineering, synthetic biology is increasingly harnessing bacterial systems to circumvent physical barriers within the tumor microenvironment. The Coordinated Activity of Prokaryote and Picornavirus for Safe Intracellular Delivery (CAPPSID) platform exemplifies this innovative paradigm. By engineering tumor-homing bacteria to serve as synthetic delivery vehicles, the CAPPSID system enables oncolytic picornaviruses to evade host neutralizing antibodies and achieve localized release within the tumor core. This prokaryote-viral cooperation overcomes the systemic immune clearance that has historically limited the efficacy of oncolytic virotherapy.22
Synthetic biology-enabled therapeutics face key translational barriers that limit their clinical scalability. First, while logic-gated cell therapies have shown exceptional safety and efficacy in hematological malignancies, their performance in solid tumors is severely constrained by the immunosuppressive TME, which drives rapid engineering-cell exhaustion and loss of effector function.23 Second, the long-term stability of synthetic genetic circuits in vivo remains unproven; genomic integration of circuit components carries a risk of insertional mutagenesis, and potential loss of logic control may lead to delayed, unpredictable toxicities.24 Third, off-the-shelf allogeneic cell therapies still carry a latent risk of host-versus-graft disease, which has not been fully evaluated in long-term follow-up studies.25 Finally, compared to traditional small molecules, synthetic biology therapeutics have vastly more complex CMC requirements, with high production costs that limit patient accessibility and widespread clinical adoption.26
4. Advanced anticancer drug delivery through nanotechnology
Even with optimally designed therapeutic payloads and intelligent execution systems, the clinical efficacy of anticancer agents is ultimately constrained by the final translational bottleneck: efficient penetration and retention within the TME.27 The TME functions as a fortified biological and physical barrier, characterized by dense extracellular matrix networks, elevated interstitial fluid pressure, and active immunosuppressive and drug clearance mechanisms.28 Nanotechnology-based delivery systems are engineered to overcome these multi-layered barriers, ensuring that precisely designed therapeutics can reach their target sites and exert their full efficacy.29,30
Recent bioengineering studies have uncovered sophisticated active defense mechanisms deployed by tumors to intercept systemically delivered therapeutics. Notably, tumor-derived small extracellular vesicles (sEV) act as a biological decoy system, intercepting and binding to lipid nanoparticles (LNPs) before they can reach cancer cells. These intercepted LNPs are subsequently cleared by the reticuloendothelial system, substantially reducing therapeutic accumulation. In an elegant engineering countermeasure, researchers co-packaged siRNA targeting Rab27a, a key regulator of sEV secretion, alongside therapeutic mRNA within the same LNP. This dual-delivery strategy effectively dismantled the tumor’s sEV-mediated defense network and enhanced therapeutic accumulation at the tumor site.31
Parallel strategies have emerged to address physical ECM barriers. Mechano-responsive chemotherapeutic approaches, including hyperbaric oxygen therapy-responsive nanorobots, have demonstrated considerable promise.32 These systems are engineered to selectively release payloads under high oxygen tension, modulating the dynamic balance between reactive oxygen species and matrix metalloproteinases.33 Complementing these experimental advances, a large-scale machine learning analysis of preclinical nanoparticle data has yielded predictive algorithms that map physicochemical properties to specific in vivo biological fates, providing a computational framework to guide the rational design of next-generation nanomedicines.34
Despite decades of research, only a handful of nanomedicines have been approved for clinical oncology, with most preclinical candidates failing to translate to clinical benefit. A core limitation is that most nanomedicine designs are optimized in immunocompetent murine models, which fail to recapitulate the high inter- and intra-patient TME heterogeneity seen in human cancers, leading to poor predictability of preclinical results.35 Second, LNP-based delivery systems still face significant off-target accumulation in the liver and spleen, driving dose-limiting systemic toxicities, and repeated administration can trigger anti-carrier immune responses that reduce therapeutic efficacy.36 Third, machine learning models for nanomedicine design are mostly trained on single-center, small-sample preclinical data, with limited multi-center standardized validation, resulting in poor model generalizability across different tumor types and patient populations.37 Finally, the scalable manufacturing of stimuli-responsive nanomedicines faces challenges in batch-to-batch consistency, which hinders regulatory approval and commercialization.38
5. Future perspectives and translational call-to-action
The clinical success of next-generation bioengineered anticancer therapeutics will not be determined by any single technological breakthrough. Rather, it will depend on whether AI-enabled design, synthetic biology, nanotechnology, human-relevant validation systems, adaptive trials, scalable CMC, and lifecycle evidence generation can be integrated into a coherent translational ecosystem. The central challenge is therefore no longer simply how to create more sophisticated therapeutic platforms, but how to connect design, delivery, validation, regulation, manufacturing and post-market learning into a closed-loop development pathway.
5.1. Treating the TME as a design variable rather than a passive barrier
A major shift required for successful translation is to treat the TME as a dynamic design variable. Immune-checkpoint expression and spatial organization directly influence target selection, delivery strategy, safety engineering and clinical stratification. PD-L1 expression, for example, can provide an actionable therapeutic axis but also reflects adaptive immunosuppression and heterogeneous resistance.39 Similarly, TGF-β signalling promotes immune exclusion, stromal remodeling and fibrotic barriers that can limit cell therapy infiltration and nanomedicine penetration.40 CD276 (B7-H3) is attractive for CAR-, antibody- and nanoparticle-based targeting because of its tumour enrichment, but heterogeneous expression and possible normal-tissue distribution require spatially restricted delivery or logic-gated recognition. CD47, a macrophage-facing “do not eat me” signal, provides an innate immune checkpoint, yet systemic blockade can cause hematological toxicity, highlighting the need for localized or combination strategies.41
These examples illustrate a broader principle: immune checkpoints should not be viewed only as drug targets, but also as state variables that determine whether a bioengineered therapy can function safely in vivo. Future therapeutic design should therefore integrate checkpoint expression, stromal architecture, vascular access, antigen heterogeneity and immune exclusion at the earliest stage of platform development. In this framework, AI can help predict permissive and resistant TME states, synthetic circuits can restrict activation to favorable spatial contexts, and nanocarriers can be engineered to remodel or bypass specific physical and immunological barriers.
5.2. Integrated preclinical validation with new approach methodologies
The traditional reliance on murine models for preclinical validation is a key contributor to the poor clinical predictability of anticancer candidates, as murine models fail to recapitulate the genetic, histological, and immunological complexity of human tumors.42 Driven by shifting global policy frameworks, new approach methodologies (NAMs) including microphysiological organ-on-a-chip systems, patient-derived organoids, and in silico AI models are rapidly replacing mandatory animal testing in preclinical development.43 In the United States, the FDA Modernization Act 2.0, alongside legislative momentum toward Modernization Act 3.0 in 2025 and 2026, explicitly authorizes and encourages the use of microphysiological systems, organoids, and in silico models in lieu of mandatory animal testing for investigational new drug applications.44 This regulatory evolution mandates that pharmaceutical developers seamlessly integrate standardized organ-on-a-chip platforms into early-stage toxicology and pharmacodynamic assessment.45 Concurrently, the European Commission and working groups led by the National Institute of Standards and Technology and CEN/CENELEC are establishing rigorous international standardization roadmaps to ensure cross-border data reproducibility and regulatory acceptance.46
However, NAMs will only influence regulatory decision-making if they are standardized. Fabrication materials, fluidic interfaces, sensor readouts, endpoint definitions and context-of-use claims must be harmonized across laboratories and jurisdictions.47 Without such standardization, organ-on-a-chip and digital models risk becoming another fragmented technology layer rather than a translational bridge.48
5.3. Making AI clinically accountable
AI-driven drug discovery and patient stratification are likely to accelerate multiple stages of oncology development, but their limitations must be explicitly addressed. Current generative models are often trained on successful public-domain datasets, creating survival and publication biases that limit their capacity to predict rare toxicities, negative results and failure modes. Many AI-designed candidates also remain optimized around known target families, and their ability to generate clinically validated therapies against truly context-dependent or historically undruggable targets remains uncertain.49
Future AI use in bioengineered cancer therapy should therefore move from performance claims to accountable evidence generation. This requires auditable design histories, uncertainty estimates, external validation across institutions, model cards, standardized benchmarks and prospective testing of whether AI-guided candidates actually reduce attrition compared with conventional discovery. Federated and privacy-preserving learning will be important for integrating multi-center molecular, pathological, imaging and clinical datasets without creating new data monopolies.50 Equally important, AI models should not remain isolated prediction engines; they should be coupled to wet-lab validation, NAMs, adaptive clinical trials and post-market surveillance so that model predictions can be continuously tested and updated.5
5.4. Aligning adaptive trials, CMC and real-world implementation
As logic-gated cell therapies, AI-designed molecules, engineered microbes and intelligent nanomedicines enter clinical development, conventional linear trial designs may be insufficient.51,52 These modalities often exhibit dynamic behavior in vivo, including inducible activation, evolving biodistribution, immune feedback, antigen escape and delayed toxicity. Adaptive trial designs can support real-time refinement of dosing, cohort expansion, biomarker selection and combination strategies. Digital twins may further assist patient stratification by integrating molecular, histopathological, imaging and clinical data to simulate therapeutic response before enrolment.53
Yet clinical acceleration will be meaningless without manufacturability. CMC is likely to remain the decisive translational bottleneck, particularly for living drugs and stimuli-responsive nanomedicines.54 Logic-gated allogeneic cell therapies require closed-system manufacturing, real-time release testing, lot-to-lot consistency and robust control of genetic circuit stability. Nanomedicines require reproducible particle size, surface chemistry, payload loading, release kinetics and biological performance at scale. For AI-designed small molecules, the near-term translational path is comparatively smoother because they can often enter established medicinal chemistry and manufacturing frameworks. By contrast, living therapeutics and complex nanomedicines require adaptive CMC regulation that allows manufacturing processes to mature across development stages without compromising safety.55
Real-world implementation also requires attention to cost and access. Technologies that depend on highly specialized infrastructure, cold-chain logistics or individualized production risk widening the gap between high-resource and low-resource settings.56 “Design for accessibility” should therefore be incorporated early: thermostable formulations, simplified allogeneic platforms, modular closed-system manufacturing, decentralized quality control and open or shared AI resources could help prevent bioengineered cancer therapy from becoming available only to a small fraction of patients.57, 58, 59
5.5. From accelerated approval to lifecycle learning
Faster discovery and adaptive approval pathways make Phase IV evidence generation more important, not less. Bioengineered therapeutics may produce delayed or context-dependent toxicities that are difficult to detect in small early-phase trials, including insertional mutagenesis, loss of circuit control, prolonged cytopenias, host-versus-graft reactions, anti-carrier immune responses, vector shedding and immune-related adverse events after TME reprogramming. Post-market surveillance should therefore be designed as part of the translational roadmap rather than added after approval.
A lifecycle evidence system should integrate cancer registries, electronic health records, pharmacovigilance reporting, digital pathology, imaging, circulating tumour DNA, immune monitoring, manufacturing metadata and patient-reported outcomes. These data should feed back into AI models, digital twins, regulatory labelling, biomarker refinement and manufacturing process improvement. In this sense, translation should be viewed as a continuous learning process rather than a one-time passage from bench to bedside. The field also needs new governance models. Academic groups, drug developers, device companies, clinical centres and regulators must share a common evidence architecture. Drug companies may lead pharmacology, clinical strategy and pharmacovigilance; device companies may provide qualified organ-on-a-chip platforms, sensors and manufacturing hardware; academic and clinical centres may contribute mechanistic biology, patient-derived models and biospecimens; and regulators may define context-of-use standards and acceptable validation endpoints. Transparent data provenance, contribution matrices, milestone-based licensing and public–private consortia will be essential to ensure that collaboration does not recreate the very silos it seeks to overcome.60
Overall, the future of bioengineered anticancer therapeutics depends on a shift from technology-centered innovation to systems-level translation. AI, synthetic biology and nanotechnology will have their greatest impact when they are connected through human-relevant validation, adaptive clinical development, scalable manufacturing, global regulatory alignment and lifecycle surveillance. Only such an integrated framework can convert sophisticated bioengineering platforms into durable, safe, affordable and broadly accessible cancer therapies (Fig. 1 and Table 1).
Fig. 1.

Translational roadmap of next-generation bioengineered anti-cancer therapies. The paradigm shift from bench to bedside is driven by the convergence of cross-disciplinary innovations. AI-driven molecular design facilitates de novo drug discovery and precise diagnostic intelligence; synthetic biology yields intelligent, logic-gated living therapeutics (e.g., CAR-NK cells and engineered bacteria); and nanotechnology overcomes tumor microenvironment barriers via advanced delivery systems (e.g., LNPs and nanorobots). Microfluidic multi-organ-on-a-chip platforms (NAMs) and AI-driven digital twins replace traditional models for efficient in silico and in vitro testing. The pipeline culminates in adaptive clinical trials for precise patient stratification and highly automated, closed-system CMC bioprocessing for scalable commercial manufacturing (created in figdraw.com). AI, artificial intelligence; CAR-NK, chimeric antigen receptor natural killer; CMC, chemistry, manufacturing, and controls; ECM, extracellular matrix; FDA, Food and Drug Administration; LNPs, lipid nanoparticles; NAMs, new approach methodologies; pH, potential of hydrogen; TME, tumor microenvironment.
Table 1.
Technology advances, translational barriers, and clinical feasibility landscape of bioengineered anticancer therapeutics.
| Bioengineering modality | Maturity level | Primary translational & CMC barriers | Clinical feasibility & adoption outlook |
|---|---|---|---|
| Generative AI & de novo design | Phase 1/2 | Data silo integration; predicting complex in vivo toxicities; regulatory standardization of generative algorithms | High; rapid near-term adoption for structural optimization and target discovery |
| Logic-gated cell therapies | Phase 1 | High CMC costs; complex closed-system bioprocessing; lot-to-lot consistency for allogeneic “off-the-shelf” cells | Moderate to high; heavily dependent on adaptive CMC regulatory frameworks and automation |
| Synthetic microbial/viral vectors | Preclinical | Host immune clearance (neutralizing antibodies); biosafety of replicating vectors; dual-biologic scale-up | Moderate; requires rigorous long-term safety validation and precise spatiotemporal control |
| Intelligent nanomedicine | Preclinical/early clinical | Scalable co-encapsulation of multi-agent payloads; batch reproducibility of stimuli-responsive materials | High; built on validated delivery platforms, though TME targeting requires refinement and validation |
| Microphysiological systems | Regulatory endorsement | Lack of standardized fabrication materials; unified fluidic interfaces; multi-organ interoperability | Very high; strongly incentivized by FDA Mod Act 2.0/3.0; critical for preclinical validation |
Abbreviations: AI, artificial intelligence; CMC, chemistry, manufacturing, and controls; FDA, Food and Drug Administration; FDA Mod Act, FDA Modernization Act; TME, tumor microenvironment.
Funding
This work was supported by the National Key Research and Development Program of China (grant number: 2023YFC2508500), Beijing Municipal Science & Technology Commission, Administrative Commission of Zhongquancun Science Park (grant number: Z231100004823032), and the National Natural Science Foundation of China (grant numbers: 82272951, 82272953).
CRediT authorship contribution statement
Guo Zhao: Conceptualization, Investigation, Writing – original draft, Visualization. Yale Jiang: Conceptualization, Investigation, Writing – original draft, Visualization. Caie Wang: Investigation, Resources, Writing – review & editing. Shuhang Wang: Conceptualization, Supervision, Project administration, Writing – review & editing, Funding acquisition. Ning Li: Conceptualization, Supervision, Project administration, Writing – review & editing, Funding acquisition.
Declaration of completing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Contributor Information
Shuhang Wang, Email: wangshuhang@cicams.ac.cn.
Ning Li, Email: lining@cicams.ac.cn.
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