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V2004 | AFP Mouse mAb | ELISA

摘要：Enzyme-linked immunosorbent assay (ELISA) has been widely used in cancer diagnostics due to its specificity, sensitivity and high throughput. However, conventional ELISA is semiquantitative and has an insufficiently low detection limit for applications requiring ultrahigh sensitivity. In this study, we developed an α-hemolysin-nanopore-based ELISA for detecting cancer biomarkers. After forming the immuno-sandwich complex, peptide probes carrying enzymatic cleavage sites are introduced, where they interact with enzymes conjugated to the detection antibodies within the complex. These probes generate distinct current signatures when translocated through the nanopore after enzymatic cleavage, enabling precise biomarker quantification. This approach offers a low detection limit of up to 0.03?fg?ml–1 and the simultaneous detection of six biomarkers, including antigen and antibody biomarkers in blood samples. Overall, the nanopore-based ELISA demonstrates high sensitivity and multiplexing capability, making it suitable for next-generation diagnostic and point-of-care testing applications.

Nature Nanotechnology [IF=34.9]

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摘要：Chimeric antigen receptor (CAR) T cell therapy has revolutionized the treatment of haematological malignancies. Challenges in overcoming physical barriers however greatly limit CAR-T cell efficacy in solid tumours. Here we show that an approach based on collagenase nanogel generally improves the outcome of T cell-based therapies, and specifically of CAR-T cell therapy. The nanogels are created by cross-linking collagenase and subsequently modifying them with a CXCR4 antagonist peptide. These nanogels can bind CAR-T cells via receptor–ligand interaction, resulting in cellular backpack delivery systems. The nanogel backpacks modulate tumoural infiltration and localization of CAR-T cells by surmounting physical barriers and disrupting chemokine-mediated CAR-T cell imprisonment, thereby addressing their navigation deficiency within solid tumours. Our approach offers a promising strategy for pancreatic cancer therapy and holds potential for advancing CAR-T cell therapy towards clinical applications.

Molecular Cancer [IF=33.9]

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Engineering [IF=26.6]

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bs-0295G-BF647 | Goat Anti-Rabbit IgG H&L,BF647 conjugated | IF

作者單位：中國科學(xué)技術(shù)大學(xué)第一附屬醫(yī)院

摘要：The delivery of nanoparticles (NPs) into solid tumours is challenged by the tumour vascular basement membrane (BM), a critical barrier beneath the endothelium with robust mechanical properties resistant to conventional treatments. Here we propose an approach that uses nitric oxide (NO) to induce the opening of endothelial junctions, creating gaps between endothelial cells and enabling the navigation of NPs through these gaps. Subsequently, NO orchestrates a transient degradation of the BM encasing NP pools in a precise, localized action, allowing the enhanced passage of NPs into the tumour interstitial space through explosive eruptions. We have engineered a NO nanogenerator tailored for near-infrared laser-triggered on-demand NO release at tumour sites. Through breaching the BM barrier, this system results in an increase of clinical nanomedicines within the tumour, boosting the tumour suppression efficacy in both mouse and rabbit models. This approach delicately manages BM degradation, avoiding excessive degradation that might facilitate cancer metastasis. Our NO nanogenerator serves as a precise spatial catalytic degradation strategy for breaching the tumour vascular BM barrier, holding promise for NP delivery into non-tumour diseases.

Advanced Functional 

Materials [IF=19]

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作者單位：鄭州大學(xué)附屬兒童醫(yī)院

摘要：In vivo optical tumor molecular imaging encounters significant challenges in achieving adequate tumor specificity and sensitivity, largely attributed to off-tumor signal leakage and the relatively low expression levels of target molecules. Therefore, a double self-amplified programmable allosteric DNA nanomachine (named HPs-tFNA) is developed through two elaborately designed hairpin structures (HP1 and HP2) hybridized on tetrahedral framework DNA (tFNA), enabling rapid, specific, and sensitive tumor molecular imaging using the highly specific expression of apurinic/apyrimidinic endonuclease 1 (APE1) in the tumor cytoplasm as a stimulus-response target. In the presence of APE1, HP2 modifies two apurinic/apyrimidinic sites (AP sites), which can be specifically recognized and cleaved by APE1, releasing a significant number of cyclic sequences (cyclic-seq) and achieving initial APE1-assisted signal amplification. Subsequently, cyclic-seq hybridizes with HP1, inducing a conformational change that converts the stem-loop structure of HP1 to a linear form. This structural change facilitates the spatial separation of the fluorophore and quencher, thereby generating fluorescence signals. Furthermore, APE1 incises two AP sites within the HP1 loop region, resulting in the release of cyclic-seq. The released cyclic-seq can hybridize with additional HP1 to continuously amplify the fluorescence signal in a cyclic manner, thereby achieving the second round of signal amplification assisted by APE1. The experimental results of this study demonstrated that HPs-tFNA can achieve rapid in situ tumor molecular imaging and guide precise surgical excision in vivo, with superior spatial specificity. In particular, HPs-tFNA can effectively monitor drug resistance in neuroblastoma cells and stratify risk levels of neuroblastoma via plasma analysis.

Advanced Functional

 Materials [IF=19]