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Featured researches published by Junli Zhou.


ACS Applied Materials & Interfaces | 2015

Poly(L‑lysine)-graft-folic acid-coupled poly(2-methyl-2-oxazoline) (PLL‑g‑PMOXA‑c‑FA): A Bioactive Copolymer for Specific Targeting to Folate Receptor-Positive Cancer Cells

Yin Chen; Wenbin Cao; Junli Zhou; Bidhari Pidhatika; Bin Xiong; Lu Huang; Qian Tian; Yiwei Shu; Weijia Wen; I-Ming Hsing; Hongkai Wu

In this study, we present the preparation, characterization and application of a novel bioactive copolymer poly(l-lysine)-graft-folic acid-coupled poly(2-methyl-2-oxazoline) (PLL-g-PMOXA-c-FA), which has a specific interaction with folate receptor (FR)-positive cancer cells. Glass surface immobilized with PLL-g-PMOXA-c-FA was demonstrated to be adhesive to FR-positive cancer cells (HeLa, JEG-3) while nonadhesive to FR-negative ones (MCF-7, HepG2) in 3 h. The specific interaction between conjugated FA on the substrate and FRs on the cells could hardly be inhibited unless a high concentration (5 mM) of free FA was used due to the multivalent nature of it. The FA functionality ratio of the copolymer on the substrate had a significant influence on the adhesion of HeLa cells, and our experiments revealed that the affinity of the substrate to the cells declined dramatically with the decrease of functionality ratio. This was believed to be caused by the polydispersity of PMOXA tethers, as supported by GPC and ToF-SIMS data. As a proof of concept in the application of our material, we demonstrated successful recovery of HeLa cells from mixture with MCF-7 (1:100) on the copolymer-coated glass, and our results showed that both high sensitivity (95.6 ± 13.3%) and specificity (24.3 ± 8.6%) were achieved.


Advanced Drug Delivery Reviews | 2016

Virus-Inspired Nucleic Acid Delivery System: Linking Virus and Viral Mimicry

Rong Ni; Junli Zhou; Naushad Hossain; Ying Chau

Targeted delivery of nucleic acids into disease sites of human body has been attempted for decades, but both viral and non-viral vectors are yet to meet our expectations. Safety concerns and low delivery efficiency are the main limitations of viral and non-viral vectors, respectively. The structure of viruses is both ordered and dynamic, and is believed to be the key for effective transfection. Detailed understanding of the physical properties of viruses, their interaction with cellular components, and responses towards cellular environments leading to transfection would inspire the development of safe and effective non-viral vectors. To this goal, this review systematically summarizes distinctive features of viruses that are implied for efficient nucleic acid delivery but not yet fully explored in current non-viral vectors. The assembly and disassembly of viral structures, presentation of viral ligands, and the subcellular targeting of viruses are emphasized. Moreover, we describe the current development of cationic material-based viral mimicry (CVM) and structural viral mimicry (SVM) in these aspects. In light of the discrepancy, we identify future opportunities for rational design of viral mimics for the efficient delivery of DNA and RNA.


RSC Advances | 2017

Polymeric Vesicle Formation via Temperature-Assisted Nanoprecipitation

Junli Zhou; Rong Ni; Ying Chau

We here report an easy and efficient strategy to prepare submicron-sized polymeric vesicles with tetrahydrofuran (THF) as a good solvent through temperature-assisted nanoprecipitation (TAN). While conventional nanoprecipitation did not yield vesicles from block co-polymers (PEG-b-PCL), TAN produced vesicles with morphology and membrane thickness similar to those obtained by film rehydration method. Elevated temperature to allow fast evaporation of THF was identified to be the key process parameter of TAN.


Chemical Communications | 2014

Highly emissive and biocompatible dopamine-derived oligomers as fluorescent probes for chemical detection and targeted bioimaging

Bin Xiong; Yin Chen; Yiwei Shu; Bo Shen; Ho Nam Chan; Yaozong Chen; Junli Zhou; Hongkai Wu


Biomaterials Science | 2016

Different oligoarginine modifications alter endocytic pathways and subcellular trafficking of polymeric nanoparticles

Junli Zhou; Ying Chau


Archive | 2015

Robust formation of biodegradable polymeric vesicles via temperature-assisted nanoprecipitation

Junli Zhou; Rong Ni; Ying Chau


Journal of Controlled Release | 2015

Cellular uptake enhancement and internalization pathway determination for intracellular polymeric particles.

Junli Zhou; Ying Chau


4th Nano Today Conference, Dubai, UAE | 2015

Cellular uptake enhancement and endocytic trafficking of oligoarginine-modified polymeric nanoparticles

Junli Zhou; Ying Chau


Archive | 2014

Study on process control of morphologies of polymeric self-assembles using Cryo-TEM imaging

Junli Zhou; Ying Chau


2013 Annual Meeting, San Francisco, USA | 2013

Effect of Different Oligoarginine Modification On Cellular Uptake and Intracellular Mechanism of Polymeric Nanoparticles

Junli Zhou; Ying Chau

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Ying Chau

Hong Kong University of Science and Technology

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Bin Xiong

Hong Kong University of Science and Technology

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Hongkai Wu

Hong Kong University of Science and Technology

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Yin Chen

Hong Kong University of Science and Technology

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Yiwei Shu

Hong Kong University of Science and Technology

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Bo Shen

Hong Kong University of Science and Technology

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Ho Nam Chan

Hong Kong University of Science and Technology

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I-Ming Hsing

Hong Kong University of Science and Technology

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Lu Huang

Hong Kong University of Science and Technology

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