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Vol. 18 (2026)

A Universal Bio-Hybrid Nanoparticle Backpack Platform Endows Stem Cells with Microenvironmental Resilience and Sustained Paracrine Signaling

https://doi.org/10.1007/s40820-026-02308-3
Yuqing Chen
Department of Ophthalmology, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, People’s Republic of China
Ying Yang
Department of Ophthalmology, Wuxi No. 2 People’s Hospital, Wuxi 214000, People’s Republic of China
Shuo Yang
Department of Ophthalmology, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, People’s Republic of China
Xingyi Shu
Department of Ophthalmology, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, People’s Republic of China
Zhiyong Liu
Department of Ophthalmology, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, People’s Republic of China
Jian Song
Department of Ophthalmology, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, People’s Republic of China
Ya‑Xuan Zhu
Shanghai Tenth People’s Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai 200072, People’s Republic of China
Han Lin
Shanghai Tenth People’s Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai 200072, People’s Republic of China
Ruili Wei
Department of Ophthalmology, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, People’s Republic of China
Jianlin Shi
Shanghai Tenth People’s Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai 200072, People’s Republic of China

Corresponding Author: Ruili Wei

ruiliwei@smmu.edu.cn

Nano-Micro Letters, Vol. 18 (2026), Article Number: 441

Abstract

The therapeutic potential of mesenchymal stem cells (MSCs) in regenerative medicine is frequently thwarted by hostile post-injury microenvironments characterized by oxidative stress, inflammation, and rapid clearance, which compromise cell survival and paracrine efficacy. Herein, we establish a universal bio-hybrid “stem cell backpack” platform designed to fundamentally overcome these bottlenecks through precise surface interface engineering. By tethering drug-loaded mesoporous silica nanoparticles onto the MSCs membrane via mild, biocompatible click chemistry, we create a programmable nanotherapeutic depot that endows host cells with dual, synergistic capabilities: (1) robust scavenging of reactive oxygen species (ROS) to ensure cellular resilience and (2) sustained, localized release of regenerative factors to amplify paracrine signaling. Using corneal chemical injury as a rigorous proof-of-concept model, this platform demonstrated unprecedented regenerative potency. The engineered cells markedly outperformed conventional therapies by simultaneously suppressing inflammatory cascades, preventing fibrosis and neovascularization, and orchestrating multi-lineage regeneration, including epithelial restoration, nerve reinnervation, and limbal stem cell reactivation. Quantitatively, this approach achieved a 63.6% enhancement in transparency restoration and a 76.9% greater reduction in tissue defects compared to cell monotherapy. Crucially, the modular design of this backpack system allows for the interchangeable loading of diverse therapeutics, extending its applicability beyond ophthalmology to other tissues facing similar microenvironmental challenges. This work presents a transformative paradigm in nanomedicine, shifting the focus from passive cell delivery to active microenvironmental modulation, thereby offering a versatile and scalable strategy for next-generation regenerative therapies across diverse clinical indications.


Highlights:
1 A universal bio-hybrid stem cell backpack platform shifts regenerative nanomedicine from passive cell delivery to active microenvironmental modulation.
2 The modular nano-depot endows stem cells with dual synergistic capabilities: robust reactive oxygen species scavenging for cellular resilience and localized factor release for amplified paracrine signaling.
3 Demonstrated in a rigorous corneal injury model, the system promotes multi-lineage regeneration and tissue repair, potentially via NF-κB/MAPK pathway modulation, offering a scalable strategy for diverse clinical applications.

Keywords

Bio-hybrid nanoplatform Engineered mesenchymal stem cells Mesoporous silica backpack Sustained paracrine signaling Microenvironmental resilience
Chen, Yuqing, Ying Yang, Shuo Yang, Xingyi Shu, Zhiyong Liu, Jian Song, Ya‑Xuan Zhu, Han Lin, Ruili Wei, and Jianlin Shi. 2026. “A Universal Bio-Hybrid Nanoparticle Backpack Platform Endows Stem Cells With Microenvironmental Resilience and Sustained Paracrine Signaling”. Nano-Micro Letters 18 (July):441. https://doi.org/10.1007/s40820-026-02308-3.
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