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Aggregate 2022年第2期3卷 72-106页

作者： jeongyun heo Dhiraj P.Murale Hey Young Yoon V.Arun Sangkee Choi Eunha Kim Jun-Seok Lee Sehoon Kim Center for Theragnosis Korea Institute of Science and Technology(KIST)Seoul 02792South Korea Molecular Recognition Research Center Korea Institute of Science and Technology(KIST)Seoul 02792South Korea Department of Pharmacology Korea University College of MedicineSeoul 02841South Korea Department of Molecular Science and Technology Ajou UniversitySuwon 16499South Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoul 02841Republic of Korea

Molecular aggregates are receiving tremendous attention,demonstrating immense potential for biomedical applications in vitro and in *** instance,the molecular aggregates of conventional fluorophores influence the electronic excitation states of the aggregates,causing characteristic photophysical property changes.A fundamental understanding of this classical relationship between molecular aggregate structures and photophysics has allowed for innovative biological *** chemical characteristics of drug molecules generally trigger the formation of colloidal aggregates,and this is considered detrimental to the drug discovery ***,nano-sized supramolecular aggregates have been used in biomedical imaging and therapy owing to their optimal properties for in vivo utility,including enhanced cell permeability,passive tumor targeting,and convenient surface ***,we provide an overview of the recent trends in molecular aggregates for biomedical *** changes in photophysical properties of conventional fluorophores and their biological applications are discussed,followed by the effects of conventional drug molecule-aggregates on drug discovery and therapeutics *** trends in the investigation of biologically important analytes with aggregation-induced emission are discussed for conventional and unconventional ***,we discuss nano-sized supramolecular aggregates used in imaging and therapeutic purposes,with a focus on in vivo utilization.

关键词： aggregation-induced emission molecular aggregate nanomedicine

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Photonic control of ligand nanospacing in self-assembly regulates stem cell fate

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Bioactive Materials 2024年第4期34卷 164-180页

作者： Sungkyu Lee Jounghyun Yoo Gunhyu Bae Ramar Thangam jeongyun heo Jung Yeon Park Honghwan Choi Chowon Kim Jusung An Jungryun Kim Kwang Rok Mun Seungyong Shin Kunyu Zhang Pengchao Zhao Yuri Kim Nayeon Kang Seong-Beom Han Dahee Kim Jiwon Yoon Misun Kang Jihwan Kim Letao Yang Solmaz Karamikamkar Jinjoo Kim Yangzhi Zhu Alireza Hassani Najafabadi Guosheng Song Dong-Hwee Kim Ki-Bum Lee Soong Ju Oh Hyun-Do Jung Hyun-Cheol Song Woo Young Jang Liming Bian Zhiqin Chu Juyoung Yoon Jong Seung Kim Yu Shrike Zhang Yongju Kim Ho Seong Jang Sehoon Kim Heemin Kang Department of Materials Science and Engineering Korea UniversitySeoul02841Republic of Korea Chemical and Biological Integrative Research Center Korea Institute of Science and TechnologySeoul02792Republic of Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoul02841Republic of Korea Department of Chemistry Korea UniversitySeoul02841Republic of Korea Materials Architecturing Research Center Korea Institute of Science and TechnologySeoul02792Republic of Korea School of Biomedical Sciences and Engineering Guangzhou International CampusSouth China University of TechnologyGuangzhou511442China Department of Chemistry and Chemical Biology Rutgers UniversityPiscatawayNJ08854USA Terasaki Institute for Biomedical Innovation Los AngelesCA90064USA State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha410082China Department of Biomedical-Chemical Engineering The Catholic University of KoreaGyeonggi-do14662Republic of Korea Electronic Materials Research Center Korea Institute of Science and TechnologySeoul02792Republic of Korea KIST-SKKU Carbon-Neutral Research Center Sungkyunkwan University(SKKU)Suwon16419Republic of Korea Department of Orthopedic Surgery Korea University Anam HospitalSeoul02841Republic of Korea Department of Electrical and Electronic Engineering and Joint Appointment with School of Biomedical Sciences The University of Hong KongHong Kong518057China Department of Chemistry and Nanoscience Ewha Womans UniversitySeoul03760Republic of Korea Division of Engineering in Medicine Department of MedicineBrigham and Women’s Hospital Harvard Medical SchoolCambridgeMA02139USA Division of Nano&Information Technology KIST SchoolKorea University of Science and Technology(UST)Seoul02792Republic of Korea College of Medicine Korea UniversitySeoul02841Republic of Korea Division of Materials Science and Engineering Hanyang UniversitySeoul04763Republic of Korea

Extracellular matrix(ECM)undergoes dynamic inflation that dynamically changes ligand nanospacing but has not been *** we utilize ECM-mimicking photocontrolled supramolecular ligand-tunable Azo^(+)self-assembly composed of azobenzene derivatives(Azo^(+))stacked via cation-πinteractions and stabilized with RGD ligand-bearing poly(acrylic acid).Near-infrared-upconverted-ultraviolet light induces cis-Azo^(+)-mediated inflation that suppresses cation-πinteractions,thereby inflating liganded *** inflation increases nanospacing of“closely nanospaced”ligands from 1.8 nm to 2.6 nm and the surface area of liganded selfassembly that facilitate stem cell adhesion,mechanosensing,and differentiation both in vitro and in vivo,including the release of loaded molecules by destabilizing water bridges and hydrogen bonds between the Azo^(+)molecules and loaded ***,visible light induces trans-Azo^(+)formation that facilitates cation-πinteractions,thereby deflating self-assembly with“closely nanospaced”ligands that inhibits stem cell adhesion,mechanosensing,and *** stark contrast,when ligand nanospacing increases from 8.7 nm to 12.2 nm via the inflation of self-assembly,the surface area of“distantly nanospaced”ligands increases,thereby suppressing stem cell adhesion,mechanosensing,and ***-term in vivo stability of self-assembly via real-time tracking and upconversion are *** tuning of ligand nanospacing can unravel dynamic ligand-cell interactions for stem cell-regulated tissue regeneration.

关键词： Dynamic self-assembly Ligand nanospacing In vivo tracking Stem cell adhesion Stem cell fate

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