AccScience Publishing / IJB / Online First / DOI: IJB025160146
RESEARCH ARTICLE
Early Access

Converging Pvt1 signaling and 3D-bioprinting technology for next-generation biodegradable tracheal replacement constructs

Wei Zuo1 Shao-Xiao Qiu2 Jian Cui1 Jian-Liao Wen1 Jun-Tao Zou1 Qing Jie Chen3* Fei Xu2*
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1 Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China.
2 Department of Respiratory and Critical Care Medicine,ShenZhen BaoAn People’s Hospital, Shenzhen 518000, China.
3 Department of Nuclear Medicine, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China.
Received: 14 April 2025 | Accepted: 8 September 2025 | Published online: 8 September 2025
© 2025 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
Abstract

The present study elucidates the mechanoregulatory role of long non-coding RNA Pvt1 in controlling endothelial cell proliferation and focal adhesion dynamics during tracheal regeneration. Using extrusion-based three-dimensional bioprinting, patient-specific tracheal stents were fabricated with hierarchically optimized architectures that combined polylactic acid–glycolic acid (PLGA) copolymers with endothelial progenitor cell (EPC)-recruiting motifs. Computational fluid dynamics-guided nozzle path planning and in situ piezoelectric characterization enabled sub-200 μm resolution in replicating native tracheal microtopography while maintaining 94% EPC viability after printing. Pvt1-enriched bioinks significantly enhanced vascularization, producing a 2.3-fold increase in neovascularization compared with controls in rat tracheal defect models, along with a 38% reduction in fibrotic markers. The dual-stage biodegradation profile (30% mass loss at 8 weeks) provided mechanical compatibility with tissue ingrowth patterns, confirmed through micro-CT–based strain mapping. The findings establish a convergence of lncRNA biology and precision bioprinting, offering an off-the-shelf solution for complex tracheal reconstruction that addresses current challenges in graft epithelialization and immunomodulatory response. The study advances the translational potential of bioengineered airway substitutes through molecularly informed design principles.

Keywords
Pvt1
Endothelial cells
Tracheal repair
3D printing
Biodegradable materials
Personalized treatment
Funding
This study was supported by National Natural Science Foundation of China (82260015), Jiangxi key research and development plan No.20243BBI91018, Jiangxi Provincial Health Commission science and technology project No.202410200, Jiangxi Province Traditional Chinese medicine science and technology project No.2023A0302, Shenzhen Baoan People's Hospital academic leader research start-up fund No.202400120201 and Shenzhen Baoan district medical health research project No. BAGZL2024036.
Conflict of interest
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing