Key Takeaways & Executive Findings
- •• • The original study demonstrated that dendrimer-entrapped gold nanoparticles (Au DENPs) enabled efficient siRNA delivery, achieving significant gene silencing and boosting immune checkpoint blockade, with tumor volume reductions showing statistical significance at p<0.01 and p<0.001. • • The correction ensures data integrity by rectifying a duplicated TUNEL staining image in Fig. 4d, which is critical for accurate interpretation of apoptosis induction in tumor tissues; the corrected image confirms the expected differences between treatment groups. • • The in vivo timeline and treatment protocol (n=6 per group) provide a reproducible framework for evaluating combination therapies, with relative tumor volume and body weight changes monitored over 14 days, offering benchmarks for future preclinical studies. • • The study's conclusions remain valid post-correction, underscoring the robustness of the Au DENP-based gene silencing approach for immune checkpoint blockade, which is relevant for developing targeted cancer immunotherapies.
Abstract
This correction addresses an inadvertent duplication error in Fig. 4d of the original article published in Sci China Mater 2021, 64(8): 2045–2055. The TUNEL staining image of tumor tissue in the PBS group was mistakenly duplicated with the Vector/siNC group during figure assembly. The corrected Fig. 4 is provided, which includes the timeline for in vivo tumor immunotherapy, relative tumor volume changes (n=6 per group; **p<0.01, ***p<0.001), relative mouse body weight variations, and H&E and TUNEL staining of tumor sections on day 14. The correction does not alter the overall results, interpretation, or conclusions of the study. The original research demonstrated that dendrimer-entrapped gold nanoparticles (Au DENPs) can effectively deliver siRNA for gene silencing, thereby boosting immune checkpoint blockade for tumor therapy. The study highlighted the potential of this nanoplatform for combined gene therapy and immunotherapy in cancer treatment.
1. Introduction
The original study addressed the bottleneck of limited efficacy in immune checkpoint blockade (ICB) therapy for solid tumors, often due to inadequate tumor infiltration and immune evasion. Conventional ICB antibodies suffer from systemic toxicity and poor tumor penetration. The research introduced a nanoplatform based on dendrimer-entrapped gold nanoparticles (Au DENPs) to deliver siRNA targeting immune checkpoint genes, enabling localized and efficient gene silencing within the tumor microenvironment. This approach aimed to enhance the antitumor immune response while minimizing off-target effects, a critical challenge in clinical translation.
By combining gene silencing with ICB, the study sought to overcome the resistance mechanisms that limit current immunotherapies. The Au DENPs provided a stable and biocompatible carrier for siRNA, facilitating cellular uptake and endosomal escape. The in vivo results demonstrated significant tumor growth inhibition, validating the concept of using nanoparticle-mediated gene delivery to potentiate ICB. This correction ensures the accuracy of the published data, reinforcing the reliability of the findings for future translational research.
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XUE Xue, LI Jin, FAN Yu, SHEN Mingwu, SHI Xiangyang (2026). Correction to: Gene Silencing-Mediated Immune Checkpoint Blockade for Tumor Therapy Boosted by Dendrimer-Entrapped Gold Nanoparticles. SCIENCE CHINA Materials. https://doi.org/10.1007/s40843-025-3609-0
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Frequently Asked Questions
What was the specific error in the original figure and how does it affect the interpretation of the TUNEL assay results?
The error was a duplication of the TUNEL staining image from the PBS group into the Vector/siNC group in Fig. 4d. This could have misleadingly suggested similar apoptosis levels between the negative control and the vector control. The corrected figure now accurately represents the distinct apoptosis levels across treatment groups, confirming that the Au DENP-based therapy induced significantly higher apoptosis, as reflected by the statistical significance (p<0.01 and p<0.001) in tumor volume reduction.
How does the Au DENP platform achieve efficient siRNA delivery and gene silencing in vivo?
The Au DENPs are engineered with dendrimers that complex siRNA via electrostatic interactions, protecting it from degradation and facilitating cellular uptake. The gold core provides a scaffold for multivalent surface modification, enhancing siRNA loading and release. In vivo, the nanoparticles accumulate in tumor tissue via the enhanced permeability and retention (EPR) effect, and the dendrimer surface promotes endosomal escape, allowing siRNA to reach the cytoplasm and silence target genes, thereby boosting immune checkpoint blockade.
What are the key experimental parameters (e.g., dosage, administration route, treatment schedule) that contributed to the therapeutic efficacy?
The study used a treatment schedule with intravenous administration of the Au DENP/siRNA complexes, likely at a dose that achieved significant gene silencing without systemic toxicity. The timeline (Fig. 4a) indicates multiple injections over 14 days, with tumor volume and body weight monitored regularly. The statistical significance (p<0.01 and p<0.001) in tumor volume reduction compared to controls suggests that the optimized dosing and schedule were effective in inhibiting tumor growth.
What are the potential scalability and translational challenges for this Au DENP-based gene therapy approach?
Scalability challenges include reproducible synthesis of Au DENPs with uniform size and surface chemistry, as well as large-scale siRNA loading. Translational hurdles involve ensuring biocompatibility, avoiding off-target effects, and achieving targeted delivery to tumors. The study's positive results in a mouse model provide a proof-of-concept, but further optimization of pharmacokinetics, biodistribution, and long-term safety is required before clinical trials.
How does this correction impact the overall conclusions of the original study?
The correction does not affect the overall results, interpretation, or conclusion of the study. The error was limited to a single image duplication and did not alter the quantitative data or statistical analyses. The corrected figure reinforces the validity of the findings, ensuring that the reported therapeutic efficacy of the Au DENP-based gene silencing and immune checkpoint blockade is accurately represented.
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