4.8 Article

Simultaneous non-invasive analysis of DNA condensation and stability by two-step QD-FRET

期刊

NANO TODAY
卷 4, 期 2, 页码 125-134

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.nantod.2009.02.008

关键词

Nanocomplex; FRET; Quantum dot; Delivery; Degradation; Nonviral

资金

  1. NIH [EB002849, DK068399]
  2. NSF [DBI-0552063, CBET0546012]

向作者/读者索取更多资源

Nanoscale vectors comprised of cationic polymers that condense DNA to form nanocomplexes are promising options for gene transfer. The rational design of more efficient nonviral gene carriers will be possible only with better mechanistic understanding of the critical rate-limiting steps, such as nanocomplex unpacking to release DNA and degradation by nucleases. We present a two-step quantum dot fluorescence resonance energy transfer (two-step QD-FRET) approach to simultaneously and non-invasively analyze DNA condensation and stability. Plasmid DNA, double-labeled with QD (525 nm emission) and nucleic acid dyes, were complexed with Cy5-labeled cationic gene carriers. The QD donor drives energy transfer step-wise through the intermediate nucleic acid dye to the final acceptor Cy5. At least three distinct states of DNA condensation and integrity were distinguished in single particle manner and within cells by quantitative ratiometric analysis of energy transfer efficiencies. This novel two-step QD-FRET method allows for more detailed assessment of the onset of DNA release and degradation simultaneously. (C) 2009 Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Engineering, Biomedical

A miRNA-based gene therapy nanodrug synergistically enhances pro-inflammatory antitumor immunity against melanoma

Yawen Ma, Huimin Lin, Peng Wang, Haocheng Yang, Jie Yu, Hao Tian, Tianyu Li, Shengfang Ge, Yilong Wang, Renbing Jia, Kam W. Leong, Jing Ruan

Summary: MicroRNA-based gene therapy using biocompatible nanocarriers shows promise in treating ocular melanoma by up-regulating tumor suppressor miR-30a-5p and inhibiting malignant phenotypes. The nanocarrier with high miRNA loading and redox-responsive release capabilities enhances the therapeutic effect. Furthermore, it promotes M1 macrophage polarization and activates Fenton reaction, synergistically enhancing anti-tumor immunity. The study demonstrates the potential of this nanocarrier for targeted gene therapy in melanoma and other cancers.

ACTA BIOMATERIALIA (2023)

Article Chemistry, Multidisciplinary

Probiotic-Inspired Nanomedicine Restores Intestinal Homeostasis in Colitis by Regulating Redox Balance, Immune Responses, and the Gut Microbiome

Jiaqi Xu, Junchao Xu, Tongfei Shi, Yinlong Zhang, Fangman Chen, Chao Yang, Xinjing Guo, Guangna Liu, Dan Shao, Kam W. Leong, Guangjun Nie

Summary: Microbiota-based therapeutics offer innovative strategies to treat inflammatory bowel diseases (IBDs), but the clinical outcome and bacterial approach need improvement. Inspired by the benefits of probiotics, bioartificial probiotics are designed to restore intestinal microenvironment and shift the gut microbiome to an anti-inflammatory state. The bioartificial probiotic consists of E. coli Nissle 1917-derived membrane (EM) as the surface and biodegradable diselenide-bridged mesoporous silica nanoparticles (SeM) as the core. This work suggests a safe and effective nanomedicine for IBDs therapy.

ADVANCED MATERIALS (2023)

Article Engineering, Biomedical

Polycationic PAMAM ameliorates obesity-associated chronic inflammation and focal adiposity

Baoding Huang, Qianfen Wan, Tianyu Li, Lexiang Yu, Wen Du, Carmen Calhoun, Kam W. Leong, Li Qiang

Summary: As a solution to the chronic inflammation and local adiposity caused by obesity, cationic polyamidoamine (PAMAM) treatment has shown promising results in improving metabolic functions and reducing body weight in diet-induced obese (DIO) mice. The treatment involves the use of PAMAM generation 3 (P-G3) scavenger and complexing P-G3 with human serum albumin (HSA) to achieve sustained release. Local injection of HSA-PG3 successfully restricts the distribution of the complex within the targeted adipose tissue and reduces focal adiposity.

BIOMATERIALS (2023)

Article Engineering, Biomedical

A bio-inspired nano-material recapitulating the composition, ultra-structure, and function of the glycosaminoglycan-rich extracellular matrix of nucleus pulposus

Xing-Xing Yang, Chi-Hung Yip, Shirui Zhao, Yi-Ping Ho, Barbara Pui Chan

Summary: By chemically modifying collagen and hyaluronic acid and co-precipitating with glycosaminoglycans, a biomimetic nano-material that mimics the composition, ultra-structure, and function of the glycosaminoglycans-rich extracellular matrix in the nucleus pulposus has been fabricated. This nano-material shows superior composition, ultra-structure, and function compared to the native nucleus pulposus. This work is of great importance for the development of intervertebral disc tissue engineering.

BIOMATERIALS (2023)

Article Plant Sciences

Sugars and sucrose transporters in pollinia of Phalaenopsis aphrodite (Orchidaceae)

Wan-Ting Sun, Sy-Chyi Cheng, Ya-Ting Chao, Shu-Yao Lin, Ting-Ting Yang, Yi-Ping Ho, Ming-Che Shih, Swee-Suak Ko

Summary: This study investigated the morphology, cytology, biochemistry, and sucrose transporters in the pollinia of Phalaenopsis orchids. Results showed that the mature pollinia accumulated high levels of sugars, including sucrose, galactinol, myo-inositol, and glucose, which provided nutrients and enhanced pollinia germination and tube growth. The expression of sucrose transporters in the pollinia was associated with pollinia maturation and germination.

JOURNAL OF EXPERIMENTAL BOTANY (2023)

Article Chemistry, Multidisciplinary

Water-Immiscible Coacervate as a Liquid Magnetic Robot for Intravascular Navigation

Pengchao Zhao, Fuyang Qu, Hao Fu, Jianyang Zhao, Jiaxin Guo, Jiankun Xu, Yi-Ping Ho, Michael K. Chan, Liming Bian

Summary: Developing magnetic ultrasoft robots requires materials with excessive deformability, responsive actuation, and rapid adaptability, which are difficult to achieve with current soft polymeric materials. We have developed a magnetically actuatable and water immiscible coacervate liquid robot based on magnetic core-shell nanoparticles. This millimeter-sized liquid robot can remain stable under changing conditions, release loaded cargoes on demand, squeeze through capillary networks within seconds, and achieve intravascular targeting guided by a magnetic field. This coacervate-based liquid robot represents a distinct design strategy for high-performance ultrasoft robots in biomedicine.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2023)

Article Chemistry, Multidisciplinary

Phenylboronic Acid-Functionalized Polyplexes Tailored to Oral CRISPR Delivery

Naoto Yoshinaga, Joyce K. Zhou, Cong Xu, Chai Hoon Quek, Yuefei Zhu, Ding Tang, Lin Yung Hung, Sarah A. Najjar, Chin Ying Angela Shiu, Kara Gross Margolis, Yeh-Hsing Lao, Kam W. Leong

Summary: Effective delivery of CRISPR-Cas9 components is crucial and oral delivery has not been explored due to the degradative nature of the gastrointestinal tract. In this study, we developed novel PBA-functionalized CS-PEI polymers for oral CRISPR delivery, which showed effective penetration in the intestinal mucosa and achieved downregulation of the target protein and reduction in cholesterol. This study demonstrates the potential of addressing the needs of gene editing in a patient-compliant manner.

NANO LETTERS (2023)

Article Engineering, Biomedical

Efficient hepatic differentiation of hydrogel microsphere-encapsulated human pluripotent stem cells for engineering prevascularized liver tissue

Shuai Deng, Xiaoyu Zhao, Yanlun Zhu, Ning Tang, Rongliang Wang, Xuerao Zhang, Fuyang Qu, Yi-Ping Ho, Wayne Yuk-Wai Lee, Jiansu Chen, Mingqiang Li, Yu Tao, Hon Fai Chan

Summary: Liver tissue engineering is advanced through the fabrication of collagen type I microspheres, enabling efficient hepatic differentiation of stem cells and assembly of prevascularized liver tissue. The microspheres exhibit high uniformity and can self-assemble with endothelial cells to form high cell-packing density liver tissue. This technology has potential applications in regenerative medicine, drug screening, and in vitro liver modeling.

BIOFABRICATION (2023)

Article Engineering, Biomedical

Delivery of Induced Neural Stem Cells Through Mechano-Tuned Silk-Collagen Hydrogels for the Recovery of Contused Spinal Cord in Rats

Ganchimeg Davaa, Jin Young Hong, Jung-Hwan Lee, Min Soo Kim, Jennifer O. Buitrago, Yu-Meng Li, Hae-Hyoung Lee, Dong Wook Han, Kam W. Leong, Jung Keun Hyun, Hae-Won Kim

Summary: Neural stem cells (NSC) have the potential to regenerate injured neural tissues, but suffer from low survival and uncontrolled differentiation. This study demonstrates that mechanically-tuned protein hydrogels can protect and enhance the long-term survival of reprogrammed NSC, alleviate neural inflammation, promote differentiation, and improve locomotor functions in treating injured spinal cord.

ADVANCED HEALTHCARE MATERIALS (2023)

Article Cell Biology

Inhibition of Abl Kinase by Imatinib Can Rescue the Compromised Barrier Function of 22q11.2DS Patient-iPSC-Derived Blood-Brain Barriers

Yunfei Li, Zhixiong Sun, Huixiang Zhu, Yan Sun, David B. Shteyman, Sander Markx, Kam W. Leong, Bin Xu, Bingmei M. Fu

Summary: The integrity of the blood-brain barrier formed by brain microvascular endothelial cells derived from 22q11.2 Deletion Syndrome patients is compromised. The haploinsufficiency of CRKL, a gene within the 22q11.2 DS deletion region, contributes to this deficit. Treatment with imatinib, an FDA-approved drug, restores the compromised blood-brain barrier by increasing the level of active forms of the CRKL protein.
Article Chemistry, Analytical

Rapid Prototyping of Multi-Functional and Biocompatible Parafilm®-Based Microfluidic Devices by Laser Ablation and Thermal Bonding

Yuanyuan Wei, Tianle Wang, Yuye Wang, Shuwen Zeng, Yi-Ping Ho, Ho-Pui Ho

Summary: In this paper, a simple, rapid, low-cost, biocompatible, and detachable microfluidic chip fabrication method based on Parafilm(R) is reported. The Parafilm(R) acts as both a bonding agent and a functional membrane, allowing the fabrication of 3D structured microfluidic chips within 2 hours with high ultimate tensile stress and high shear stress. The fabricated chips demonstrate better stability, reliability, and high performance for practical actuation devices. Moreover, the Parafilm(R)-based microfluidic devices show excellent biocompatibility and can be used for biochemical applications and point-of-care diagnostics.

MICROMACHINES (2023)

Article Engineering, Biomedical

Dendritic cell-mimicking scaffolds for ex vivo T cell expansion

Hye Sung Kim, Tzu-Chieh Ho, Moshe J. Willner, Michael W. Becker, Hae-Won Kim, Kam W. Leong

Summary: In this study, we propose an ex vivo T cell expansion system that mimics natural antigen-presenting cells for adoptive cell therapy. The system utilizes microfiber scaffolds coated with dendritic cell membrane to replicate the physicochemical properties of dendritic cells, leading to greater expansion and functionality of T cells. This scalable and customizable platform holds promise for future research and application in cell therapy.

BIOACTIVE MATERIALS (2023)

Article Engineering, Biomedical

Stabilization and improved functionality of three-dimensional perfusable microvascular networks in microfluidic devices under macromolecular crowding

Ho-Ying Wan, Jack Chun Hin Chen, Qinru Xiao, Christy Wingtung Wong, Boguang Yang, Benjamin Cao, Rocky S. S. Tuan, Susan K. K. Nilsson, Yi-Ping Ho, Michael Raghunath, Roger D. D. Kamm, Anna Blocki

Summary: This study introduces a strategy for stabilizing microvascular networks (MVNs) through macromolecular crowding (MMC), which enhances their stability and functionality by promoting the accumulation of cellular junctions and basement membrane components. Applying MMC to MVNs in microfluidic devices provides a reliable and versatile approach to stabilize engineered microvessels under simulated physiological conditions.

BIOMATERIALS RESEARCH (2023)

Article Nanoscience & Nanotechnology

Quantitative phase deformability cytometry for noninvasive high-throughput characterization of cells

Qinru Xiao, Yanping He, Md Habibur Rahman, Guangyao Cheng, Renjie Zhou, Yi-Ping Ho

Summary: Quantitative phase deformability cytometry (QPDC), constructed from a quantitative phase imaging system, improves the analysis of cellular contours and provides accurate characterization of cellular mechanical properties, especially for cells subjected to actin depolymerization. The platform enhances the capabilities of label-free cell characterization for biological and clinical applications.
Article Chemistry, Multidisciplinary

Multifunctional Cationic Hyperbranched Polyaminoglycosides that Target Multiple Mediators for Severe Abdominal Trauma Management

Yongqiang Xiao, He Fang, Yuefei Zhu, Jie Zhou, Zhanzhan Dai, Hongxia Wang, Zhaofan Xia, Zhaoxu Tu, Kam W. Leong

Summary: This study investigates the effectiveness of cationic hyperbranched polyaminoglycosides derived from tobramycin (HPT) and disulfide-included HPT (ss-HPT) in scavenging cell-free nucleic acids (cfNAs) to mitigate posttrauma inflammation and hypercoagulation. Both polymers demonstrate the ability to suppress inflammation and hypercoagulation by efficiently scavenging cfNAs, and exhibit potent antibacterial effects. Additionally, these polymers exhibit favorable modulatory effects on inflammation and therapeutic outcomes in a mouse model. Notably, ss-HPT shows high accumulation and retention in injured organs of traumatized mice, with a higher biodegradation rate in healthy mice compared to HPT.

ADVANCED SCIENCE (2023)

Article Chemistry, Multidisciplinary

Macrophage-hitchhiking interleukin-10 plasmid DNA delivery system modulates rheumatoid arthritis microenvironment via the re-polarization of macrophages

Xintong Zhang, Yanhong Liu, Wei Liu, Liqing Chen, Mingji Jin, Zhonggao Gao, Wei Huang

Summary: This study developed a macrophage-hitchhiking gene delivery system for the treatment of rheumatoid arthritis. The system demonstrated excellent targeting ability and nuclear entry ability, leading to efficient transfection of interleukin-10 in macrophages and alleviation of inflammation symptoms. This research provides a novel strategy for gene therapy and gene delivery system design for rheumatoid arthritis and other similar inflammatory diseases.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

An integrated approach to testing and assessment (IATA) to support grouping and read-across of nanomaterials in aquatic systems

Richard K. Cross, Dave Spurgeon, Claus Svendsen, Elma Lahive, Simon Little, Frank von der Kammer, Frederic Loosli, Marianne Matzke, Teresa F. Fernandes, Vicki Stone, Willie J. G. M. Peijnenburg, Eric A. J. Bleeker

Summary: Even small changes in physicochemical properties of nanoforms (NFs) can influence their environmental fate and hazard. Testing and characterizing each individual NF will not be feasible due to the large number of new materials being developed. Targeting the most relevant form of the NF for a given exposure is important for efficient risk assessment. In aquatic systems, functional fate processes play a key role in determining the exposure relevant form of NFs. Grouping of NFs and read-across based on functional fate pathways can be justified by considering the shared fate and hazard profile. A new Integrated Approaches to Testing and Assessment (IATA) is presented, focusing on dissolution, dispersion stability, chemical transformations, and the contribution to toxicity from particles and dissolved components. This IATA can be used as a template for future in vivo kinetic assessments.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

Black phosphorus hydrogel inverse opal microneedle patches for psoriasis treatment

Minhui Lu, Xiaoxuan Zhang, Lijun Cai, Jingjing Gan, Jinglin Wang, Yu Wang, Yuanjin Zhao

Summary: Researchers have proposed a novel black phosphorus-loaded hydrogel inverse opal microneedle patch that exhibits photothermal responsive capacity and vivid structural color screening for psoriasis treatment. With improved materials, structures, and functions, the microneedle patch enables intelligent drug delivery and enhances drug loading and controllable release.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

Microfluidic-based spatiotemporal control of oxygen concentration in bacteria suspension culture from bulk to the single cells

Qianyun Tang, Dandan Wang, Jinhui Cui, Yiheng Zhang, Junyang Mei, Jing Du, Anyue Xia, Qian Sun, Dan Luo, Baosan Han, Mingzhe Gan, Peifeng Liu

Summary: This study presents a novel microfluidic platform for precise and flexible control of oxygen concentrations in microbial suspension culture. The platform demonstrates unique capabilities for spatiotemporal gas control and detection, allowing for applications in screening, studying, and culturing industrial or niche-specific environmental microbiomes.

NANO TODAY (2024)

Review Chemistry, Multidisciplinary

The lull before microplastics pollution outbreaks: Some implications for human health and control strategies

Jiaen Wu, Hao Chen, Jiawei Xu, Muhammad Saif Ur Rahman, Shengmei Li, Jie Wang, Shifen Huang, Charles C. Han, Shanshan Xu, Ying Liu

Summary: This review categorizes the potential health risks of microplastic pollution by focusing on the three primary pollution sources. It provides an in-depth analysis of the pharmacokinetics, toxicity potential, and biological mechanism of microplastics in the human body. The review aims to fill knowledge gaps about the toxicity of microplastics on human health and provide ideas for repairing the damage caused by microplastics.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

Multifunctional hybrid oncolytic virus-mimicking nanoparticles for targeted induce of tumor-specific pyroptosis and enhanced anti-tumor immune response in melanoma

Fanshu Ma, Yi Cao, Jincong Yan, Zhongzhong Lu, Lina Sun, Zahid Hussain, Zheng Wang, Li Wang, Renjun Pei

Summary: This study proposes a simple yet powerful method to create multifunctional hybrid nanovesicles that combine the characteristics of oncolytic viruses and pyroptosis, leading to enhanced tumor targeting and improved immune response. The results demonstrate excellent tumor inhibition efficacy against melanoma and pulmonary metastasis.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

Two-photon phototriggering of ROS storm in ruthenium(II) coordinated carbon nitride for robust cancer immunotherapy

Fangmian Wei, Johannes Karges, Siyuan Gao, Lili Wang, Xiting Zhang, Xing-Can Shen, Liangnian Ji, Hui Chao

Summary: This study presents the coordination of Ru(II) polypyridine complexes to graphitic carbon nitride nanosheets for oxygen-self-sufficient two-photon photodynamic immunotherapy. The conjugates were found with strong two-photon absorption and could generate reactive oxygen species (ROS) to induce cell death and inhibit tumor growth through immune system activation.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

Hypoxia-responsive calixarene-grafted self-assembled peptide hydrogel for inflammation suppression in ischemic stroke

Weiwei Zheng, Shun-Yu Yao, Haijun Hu, Xiping Chen, Zhefeng Qian, Wenxing Liu, Yang Zhu, Zhengwei Mao, Dong-Sheng Guo, Changyou Gao

Summary: In this study, a hypoxia-responsive self-assembled peptide hydrogel was prepared for ischemic stroke treatment. The hydrogel showed the ability to release drugs and effectively improve motor function, reduce infarct volume, and alleviate inflammation.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

A cascaded enzyme system based on the catalase-like activity of Ti3C2Tx MXene nanosheets for the efficient combination cancer therapy

Qianqian Qiao, Jinyu Wang, Kai Long, Linwei Li, Jiahao Chen, Yuhao Guo, Ziqiang Xu, Ying Kuang, Tianjiao Ji, Cao Li

Summary: This study developed a catalytic system using titanium-based MXene nanosheets to load enzymes and anticancer drugs. The nanosheets demonstrated catalase-like activity and photothermal capability, enabling enhanced cancer treatment through starvation therapy and alleviation of hypoxia. In vitro and in vivo studies confirmed the effective anticancer capability of this enzyme cascade system.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

Eliciting immunogenic cell death via tumor-associated fibroblast inactivation and autophagy induction with doxorubicin and silybin loaded molecularly imprinted nanosystem

Shiyang Wu, Yan He, Ruiqi Zhou, Chunlin Chen, Dawei Chen, Haiyang Hu

Summary: In this research, LDHA@MIP-DSD nanoparticles were designed to enhance the effectiveness of immunogenic cell death (ICD) in cancer immunotherapy. LDHA@MIP-DSD improved the accessibility of nanodrugs to cancer cells by surface imprinting LDHA and induced autophagy with SLN. The combination of these two effects resulted in optimal immune stimulation and antitumor efficiency.

NANO TODAY (2024)

Article Chemistry, Multidisciplinary

Ultra-strong penetrating and GSH-responsive oral drug delivery system improved therapeutic effect of gemcitabine for pancreatic tumors

Xu Zhang, Kejian Shi, Jiahui Mao, Kerou Mao, Yangrui Jia, Jiakun Zhang, Qingzhen Wang, Ru Bai, Fene Gao, Shihui Liu, Mengyu Guo, Fenglan Qin, Shengmin Li, Chunying Chen, Huige Zhou, Jing Liu, Fulin Chen

Summary: Compared with vein injection, oral administration is a preferred non-invasive and self-help treatment option for cancer therapy. However, the harsh gastrointestinal tract and biological barriers limit the stability and efficiency of oral drug delivery systems. To overcome these challenges, researchers have developed Cyssome, a drug delivery platform that can maintain stability in harsh environments, penetrate biological barriers, and improve drug release and bioavailability.

NANO TODAY (2024)