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Dai T, Guo B, Qi G, Xu S, Zhou C, Bazan GC, Liu B. An AIEgen as an Intrinsic Antibacterial Agent for Light-Up Detection and Inactivation of Intracellular Gram-Positive Bacteria. Adv Healthc Mater 2021; 10:e2100885. [PMID: 34369089 DOI: 10.1002/adhm.202100885] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/22/2021] [Indexed: 12/22/2022]
Abstract
Infections caused by Gram-positive bacteria, especially those able to invade and survive in host cells, threaten human health severely. It is therefore highly desirable to develop therapeutics that can selectively target and kill intracellular Gram-positive pathogens with minimal toxicity to host cells. Herein, it is described that the aggregation-induced emission luminogen (AIEgen) TPEPy-Et, containing a positively charged pyridinium group and a hydrophobic tetraphenylethylene fragment, is effective for Gram-positive bacteria detection and elimination. The fluorescence of TPEPy-Et is greatly enhanced after incubation with Gram-positive bacteria, which can be used to detect and trace the bacteria in cells. TPEPy-Et also shows excellent killing effects against both extracellular and intracellular Gram-positive bacteria through a membrane depolarization mechanism. The luminescent antibacterial agent TPEPy-Et is thus promising for diagnosis and therapy against intracellular bacterial infection.
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Affiliation(s)
- Tianjiao Dai
- Integrative Sciences and Engineering Program NUS Graduate School National University of Singapore Singapore 119077 Singapore
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117585 Singapore
| | - Bingpeng Guo
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
| | - Guobin Qi
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117585 Singapore
| | - Shidang Xu
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117585 Singapore
| | - Cheng Zhou
- Department of Chemistry National University of Singapore Singapore 117543 Singapore
| | - Guillermo C. Bazan
- Department of Chemistry National University of Singapore Singapore 117543 Singapore
| | - Bin Liu
- Integrative Sciences and Engineering Program NUS Graduate School National University of Singapore Singapore 119077 Singapore
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117585 Singapore
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52
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Zhang Q, Hu X, Dai X, Ling P, Sun J, Chen H, Gao F. General Strategy to Achieve Color-Tunable Ratiometric Two-Photon Integrated Single Semiconducting Polymer Dot for Imaging Hypochlorous Acid. ACS NANO 2021; 15:13633-13645. [PMID: 34374516 DOI: 10.1021/acsnano.1c04581] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
It is highly desired and challenging to construct integrated (all-in-one) single semiconducting-polymer-derived dot (Pdot) without any postmodification but with desired performances for bioapplications. In this work, eight hypochlorous acid (HClO)-sensitive integrated polymers and corresponding polymer-derived Pdots are designed through molecular engineering to comparatively study their analytical performances for detecting and imaging HClO. The optimized polymers-derived Pdots are obtained through regulating donor-acceptor structure, the content of HClO-sensitive units, and the position of HClO-sensitive units in the polymer backbone. The designed Pdots display distinguished characteristics including multicolours with blue, yellow, and red three primary fluorescence colors, determination mode from single-channel to dual-channel (ratiometric) quantification, ultrafast response, low detection limit, and high selectivity for ClO- sensing based on specific oxidation of ClO--sensitive unit 10-methylphenothiazine (PT) accompanied by altering the intramolecular charge transfer (ICT) and fluorescence resonance energy transfer (FRET) processes in Pdots. The prepared integrated Pdots are also applied for two-photon ClO- imaging in HeLa cells and one- and two-photon ClO- imaging produced in acute inflammation in mice with satisfactory results. We believe that the present study not only provides excellent integrated fluorescent nanoprobes for ClO- monitoring in living systems but also extends a general strategy for designing integrated semiconducting polymers and Pdots with desired performances for biological applications.
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Affiliation(s)
- Qiang Zhang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Biosensing and Bioimaging (LOBAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, People's Republic of China
| | - Xiaoxiao Hu
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Biosensing and Bioimaging (LOBAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, People's Republic of China
| | - Xiaomei Dai
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Biosensing and Bioimaging (LOBAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, People's Republic of China
| | - Pinghua Ling
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Biosensing and Bioimaging (LOBAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, People's Republic of China
| | - Junyong Sun
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Biosensing and Bioimaging (LOBAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, People's Republic of China
| | - Hongqi Chen
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Biosensing and Bioimaging (LOBAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, People's Republic of China
| | - Feng Gao
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Biosensing and Bioimaging (LOBAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, People's Republic of China
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53
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Wang P, Wang JW, Zhang WH, Bai H, Tang G, Young DJ. In Vitro Anticancer Activity of Nanoformulated Mono- and Di-nuclear Pt Compounds. Chem Asian J 2021; 16:2993-3000. [PMID: 34387027 DOI: 10.1002/asia.202100901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Indexed: 12/14/2022]
Abstract
Nanoformulations of mononuclear Pt complexes cis-PtCl2 (PPh3 )2 (1), [Pt(PPh3 )2 (L-Cys)] ⋅ H2 O (3, L-Cys=L-cysteinate), trans-PtCl2 (PPh2 PhNMe2 )2 (4; PPh2 PhNMe2 =4-(dimethylamine)triphenylphosphine), trans-PtI2 (PPh2 PhNMe2 )2 (5) and dinuclear Pt cluster Pt2 (μ-S)2 (PPh3 )4 (2) have comparable cytotoxicity to cisplatin against murine melanoma cell line B16F10. Masking of these discrete molecular entities within the hydrophobic core of Pluronic® F-127 significantly boosted their solubility and stability, ensuring efficient cellular uptake, giving in vitro IC50 values in the range of 0.87-11.23 μM. These results highlight the potential therapeutic value of Pt complexes featuring stable Pt-P bonds in nanocomposite formulations with biocompatible amphiphilic polymers.
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Affiliation(s)
- Pan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Jian-Wei Wang
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Wen-Hua Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Hongzhen Bai
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Guping Tang
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - David J Young
- College of Engineering Information Technology & Environment, Charles Darwin University, Darwin, Northern Territory, 0909, Australia
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Liu X, Deng Q, Zhang L, Sang Y, Dong K, Ren J, Qu X. Elimination of macrophage-entrapped antibiotic-resistant bacteria by a targeted metal-organic framework-based nanoplatform. Chem Commun (Camb) 2021; 57:2903-2906. [PMID: 33616152 DOI: 10.1039/d0cc08340b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A novel metal-organic framework-based platform was designed and constructed for photosensitizer delivery for the elimination of intracellular antibiotic-resistant bacteria. With the merit of targeting and internalizing ability, the system could kill the stealthy bacteria efficiently under light irradiation.
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Affiliation(s)
- Xuemeng Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qingqing Deng
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Lu Zhang
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Yanjuan Sang
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kai Dong
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and University of Science and Technology of China, Hefei, Anhui 230026, China and University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China. and University of Science and Technology of China, Hefei, Anhui 230026, China and University of Chinese Academy of Sciences, Beijing 100039, P. R. China
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