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Chao X, Johnson TG, Temian MC, Docker A, Wallabregue ALD, Scott A, Conway SJ, Langton MJ. Coupling Photoresponsive Transmembrane Ion Transport with Transition Metal Catalysis. J Am Chem Soc 2024; 146:4351-4356. [PMID: 38334376 PMCID: PMC10885138 DOI: 10.1021/jacs.3c13801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Artificial ion transporters have been explored both as tools for studying fundamental ion transport processes and as potential therapeutics for cancer and channelopathies. Here we demonstrate that synthetic transporters may also be used to regulate the transport of catalytic metal ions across lipid membranes and thus control chemical reactivity inside lipid-bound compartments. We show that acyclic lipophilic pyridyltriazoles enable Pd(II) cations to be transported from the external aqueous phase across the lipid bilayer and into the interior of large unilamellar vesicles. In situ reduction generates Pd(0) species, which catalyze the generation of a fluorescent product. Photocaging the Pd(II) transporter allows for photoactivation of the transport process and hence photocontrol over the internal catalysis process. This work demonstrates that artificial transporters enable control over catalysis inside artificial cell-like systems, which could form the basis of biocompatible nanoreactors for applications such as drug synthesis and delivery or to mediate phototargeted catalyst delivery into cells.
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Affiliation(s)
- Xiangyu Chao
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Toby G Johnson
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Maria-Carmen Temian
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Andrew Docker
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | | | - Aaron Scott
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Stuart J Conway
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
- Department of Chemistry & Biochemistry, University of California Los Angeles, 607 Charles E. Young Drive East, P.O. Box 951569, Los Angeles, California 90095-1569, United States
| | - Matthew J Langton
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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2
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Wang S, della Sala F, Cliff MJ, Whitehead GFS, Vitórica-Yrezábal IJ, Webb SJ. Chiral 19F NMR Reporter of Foldamer Conformation in Bilayers. J Am Chem Soc 2022; 144:21648-21657. [DOI: 10.1021/jacs.2c09103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Siyuan Wang
- Department of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, U.K
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, ManchesterM1 7DN, U.K
| | - Flavio della Sala
- Department of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, U.K
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, ManchesterM1 7DN, U.K
| | - Matthew J. Cliff
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, ManchesterM1 7DN, U.K
| | | | | | - Simon J. Webb
- Department of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, U.K
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, ManchesterM1 7DN, U.K
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Xu R, Duan C, Meng Z, Zhao J, He Q, Zhang Q, Gong C, Huang J, Xie Q, Yang Q, Bai Y. Lipid Microcapsules Promoted Neural Stem Cell Survival in the Infarcted Area of Mice with Ischemic Stroke by Inducing Autophagy. ACS Biomater Sci Eng 2022; 8:4462-4473. [PMID: 36069708 DOI: 10.1021/acsbiomaterials.2c00228] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Intracerebral transplantation of neural stem cells (NSCs) for ischemic stroke treatment has been demonstrated to be inefficient, with only <5% of delivered cells being retained. Microcapsules may be a good carrier for NSC delivery; however, the current microcapsules do not fully meet the demands for cell survival after transplantation. In the present study, we designed a strategy for the encapsulation of NSCs in a novel lipid-alginate (L-A) microcapsule based on a two-step method. The protective effect of a L-A microcapsule on oxygen-glucose deprivation (OGD) was investigated by using the CCK8 test, the LDH release test, and flow cytometry. Mechanisms underlying the prosurvival effect were investigated by detecting autophagy markers like P62, LC3-I, and LC3-II, and autophagy flux analysis was also performed. Lastly, the ability of the L-A microcapsule to support NSCs delivery for ischemic stroke was investigated in the middle cerebral artery occlusion (MCAO) model. We found that L-A microcapsules exerted a good protective effect against OGD compared with control and alginate microcapsules. The L-A microcapsules were found to promote cell survival by not only providing a "physical" barrier but also altering autophagy markers like P62 and LC3-II, which enhanced autophagy flux. This novel microcapsule was confirmed to be suitable for NSC delivery in vivo, which alleviated transplanted NSC apoptosis, reduced the infarct volume, decreased brain edema, improved neurological deficit scores, and lastly, improved survival rate. The findings of this study may provide a new method for stem cell delivery, raising the prospect that intracerebral cell transplantation may be used to treat, for instance, ischemic stroke, traumatic brain injury, and so on.
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Affiliation(s)
- Rui Xu
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Chunmei Duan
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Zhaoyou Meng
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Jian Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xichangan Street, Changan District, Xi'an 710119, China
| | - Qian He
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Qin Zhang
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Changxiong Gong
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Jiacheng Huang
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Qi Xie
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Qingwu Yang
- Department of Neurology, The Second Affiliated Hospital, Army Medical University, Xinqiao Zheng Street, Shapingba District, Chongqing 400037, China
| | - Yang Bai
- Department of Otolaryngology, The First Affiliated Hospital, Army Medical University, Gaotanyan Zheng Street, Shapingba District, Chongqing 400038, China
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4
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Yang H, Du S, Ye Z, Wang X, Yan Z, Lian C, Bao C, Zhu L. A system for artificial light signal transduction via molecular translocation in a lipid membrane. Chem Sci 2022; 13:2487-2494. [PMID: 35310493 PMCID: PMC8864706 DOI: 10.1039/d1sc06671d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 02/04/2022] [Indexed: 11/21/2022] Open
Abstract
Light signal transduction pathways are central components of the mechanisms that regulate plant development, in which photoreceptors receive light and participate in light signal transduction. Chemical systems can be designed...
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Affiliation(s)
- Huiting Yang
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Shengjie Du
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Zhicheng Ye
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Xuebin Wang
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Zexin Yan
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Cheng Lian
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Chunyan Bao
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, East China University of Science and Technology Shanghai 200237 China
| | - Linyong Zhu
- Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, East China University of Science and Technology Shanghai 200237 China
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