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Meng J, Cheung LH, Ren Y, Stuart MCA, Wang Q, Chen S, Chen J, Leung FKC. Aqueous Supramolecular Transformations of Motor Bola-Amphiphiles at Multiple Length-Scale. Macromol Rapid Commun 2024:e2400261. [PMID: 38805189 DOI: 10.1002/marc.202400261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/24/2024] [Indexed: 05/29/2024]
Abstract
Molecular motor amphiphiles have already been widely attempted for dynamic nanosystems across multiple length-scale for developments of small functional materials, including controlling macroscopic foam properties, amplifying motion as artificial molecular muscles, and serving as extracellular matrix mimicking cell scaffolds. However, limiting examples of bola-type molecular motor amphiphiles are considered for constructing macroscopic biomaterials. Herein, this work presents the designed two second generation molecular motor amphiphiles, motor bola-amphiphiles (MBAs). Aside from the photoinduced motor rotation of MBAs achieved in both organic and aqueous media, the rate of recovering thermal helix inversion step can be controlled by the rotor part with different steric hindrances. Dynamic assembled structures of MBAs are observed under (cryo)-transmission electron microscopy (TEM). This dynamicity assists MBAs in further assembling as macroscopic soft scaffolds by applying a shear-flow method. Upon photoirradiation, the phototropic bending function of MBA scaffolds is observed, demonstrating the amplification of molecular motion into macroscopic phototropic bending functions at the macroscopic length-scale. Since MBAs are confirmed with low cytotoxicity, human bone marrow-derived mesenchymal stem cells (hBM-MSCs) can grow on the surface of MBA scaffolds. These results clearly demonstrate the concept of designing MBAs for developing photoresponsive dynamic functional materials to create new-generation soft robotic systems and cell-material interfaces.
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Affiliation(s)
- Jiahui Meng
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, 999077, China
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper, South China Normal University, Guangzhou, 510006, China
| | - Leong-Hung Cheung
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Yikun Ren
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Marc C A Stuart
- Centre for System Chemistry, Stratingh Institute for Chemistry and Groningen Biomolecular Science and Biotechnology Institute, University of Groningen, AG Groningen, 9747, Netherlands
| | - Qian Wang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Shaoyu Chen
- School of Fashion and Textiles, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Jiawen Chen
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper, South China Normal University, Guangzhou, 510006, China
| | - Franco King-Chi Leung
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, 999077, China
- Centre for Eye and Vision Research, 17 W Hong Kong Science Park, Hong Kong, 999077, China
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Steyn HF, White LJ, Hilton KLF, Hiscock JR, Pohl CH. Supramolecular Self-Associating Amphiphiles Inhibit Biofilm Formation by the Critical Pathogens, Pseudomonas aeruginosa and Candida albicans. ACS OMEGA 2024; 9:1770-1785. [PMID: 38222503 PMCID: PMC10785623 DOI: 10.1021/acsomega.3c08425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/05/2023] [Accepted: 12/08/2023] [Indexed: 01/16/2024]
Abstract
In 2019, 4.95 million deaths were directly attributed to antimicrobial-resistant bacterial infections globally. In addition, the mortality associated with fungal infections is estimated at 1.7 million annually, with many of these deaths attributed to species that are no longer susceptible to traditional therapeutic regimes. Herein, we demonstrate the use of a novel class of supramolecular self-associating amphiphilic (SSA) salts as antimicrobial agents against the critical pathogens Pseudomonas aeruginosa and Candida albicans. We also identify preliminary structure-activity relationships for this class of compound that will aid the development of next-generation SSAs demonstrating enhanced antibiofilm activity. To gain insight into the possible mode of action for these agents, a series of microscopy studies were performed, taking advantage of the intrinsic fluorescent nature of benzothiazole-substituted SSAs. Analysis of these data showed that the SSAs interact with the cell surface and that a benzothiazole-containing SSA inhibits hyphal formation by C. albicans.
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Affiliation(s)
- Hendrik
J. F. Steyn
- Department
of Microbiology and Biochemistry, University
of the Free State, Bloemfontein, Free State 9301, South Africa
| | - Lisa J. White
- School
of Chemistry and Forensic Science, University
of Kent, Kent, Canterbury CT2 7NH, United Kingdom
| | - Kira L. F. Hilton
- School
of Chemistry and Forensic Science, University
of Kent, Kent, Canterbury CT2 7NH, United Kingdom
| | - Jennifer R. Hiscock
- School
of Chemistry and Forensic Science, University
of Kent, Kent, Canterbury CT2 7NH, United Kingdom
| | - Carolina H. Pohl
- Department
of Microbiology and Biochemistry, University
of the Free State, Bloemfontein, Free State 9301, South Africa
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