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Luo Q, Luo J, Luan Z, Xu K, Tian L, Zhang K, Peng X, Yuan M, Zheng C, Shu Z, Zhang Y, Tan S, Dan R, Mequanint K, Fan C, Xing M, Yang S. Blue Laser Triggered Hemostatic Peptide Hydrogel for Gastrointestinal Bleeding Treatment. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2405290. [PMID: 39011814 DOI: 10.1002/adma.202405290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 06/16/2024] [Indexed: 07/17/2024]
Abstract
In an emergency, nonvariceal upper gastrointestinal bleeding (NVUGIB), endoscopic hemostasis is considered the gold standard intervention. However, current endoscopic hemostasis is very challenging to manage bleeding in large-diameter or deep lesions highly prone to rebleeding risk. Herein, a novel hemostatic peptide hydrogel (HPH) is reported, consisting of a self-assembly peptide sequence CFLIVIGSIIVPGDGVPGDG (PFV) and gelatin methacryloyl (GelMA), which can be triggered by blue laser endoscopy (BLE) for nonvariceal upper gastrointestinal bleeding treatment without recurring bleeding concerns. Upon contact with GelMA solution, PFV immediately fibrillates into β-sheet nanofiber and solvent-induced self-assembly to form HPH gel. HPH nanofiber networks induced ultrafast coagulation by enveloping blood cells and activating platelets and coagulation factors even to the blood with coagulopathy. Besides its remarkable hemostatic performance in artery and liver injury models, HPH achieves instant bleeding management in porcine NVUGIB models within 60 s by preventing the rebleeding risk. This work demonstrates an extraordinary hemostatic agent for NVUGIB intervention by BLE for the first time, broadening potential application scenarios, including patients with coagulopathy and promising clinical prospects.
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Affiliation(s)
- Qiang Luo
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Jie Luo
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Zhaohui Luan
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Kaige Xu
- Department of Mechanical Engineering, University of Manitoba, Winnipeg, R3T 2N2, Manitoba, Canada
| | - Lixing Tian
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Kebin Zhang
- Clinical Medical Research Center, Xinqiao Hospital, No.183, Xinqiao Street, Chongqing, 400037, China
| | - Xue Peng
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Mengxue Yuan
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Chuanhao Zheng
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Zhenzhen Shu
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Yuchen Zhang
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Shali Tan
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Ruijue Dan
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Kibret Mequanint
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, N6A 5B9, Canada
| | - Chaoqiang Fan
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
| | - Malcolm Xing
- Department of Mechanical Engineering, University of Manitoba, Winnipeg, R3T 2N2, Manitoba, Canada
| | - Shiming Yang
- Department of Gastroenterology, Xinqiao Hospital, No. 183, Xinqiao Street, Chongqing, 400037, China
- Chongqing Municipality Clinical Research Center for Gastroenterology, Chongqing, 400037, China
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Sen S, Ali R, Singh H, Onkar A, Bhadauriya P, Ganesh S, Verma S. An unnatural amino acid modified human insulin derivative for visual monitoring of insulin aggregation. Org Biomol Chem 2023; 21:7561-7566. [PMID: 37671483 DOI: 10.1039/d3ob01038d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Insulin often forms toxic fibrils during production and transportation, which are deposited as amyloids at repeated injection sites in diabetic patients. Distinguishing early fibrils from non-fibrillated insulin is difficult. Herein, we introduce a chemically modified human insulin derivative with a distinct visual colour transition upon aggregation, facilitating insulin quality assessment.
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Affiliation(s)
- Shantanu Sen
- Department of Chemistry, Indian Institution of Technology Kanpur, Kanpur-208016, UP, India.
| | - Rafat Ali
- Department of Chemistry, Indian Institution of Technology Kanpur, Kanpur-208016, UP, India.
| | - Harminder Singh
- Department of Chemistry, Indian Institution of Technology Kanpur, Kanpur-208016, UP, India.
| | - Akanksha Onkar
- Department of Biological Sciences and Bioengineering, Indian Institution of Technology Kanpur, Kanpur-208016, UP, India
| | - Pratibha Bhadauriya
- Department of Biological Sciences and Bioengineering, Indian Institution of Technology Kanpur, Kanpur-208016, UP, India
| | - Subramaniam Ganesh
- Department of Biological Sciences and Bioengineering, Indian Institution of Technology Kanpur, Kanpur-208016, UP, India
| | - Sandeep Verma
- Department of Chemistry, Indian Institution of Technology Kanpur, Kanpur-208016, UP, India.
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Sarkar A, Namboodiri V, Kumbhakar M. Single-Molecule Orientation Imaging Reveals Two Distinct Binding Configurations on Amyloid Fibrils. J Phys Chem Lett 2023:4990-4996. [PMID: 37220418 DOI: 10.1021/acs.jpclett.3c00823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Fluorescence readouts for an amyloid fibril sensor critically depend on its molecular interaction and local environment offered by the available structural motifs. Here we employ polarized points accumulation for imaging in nanoscale topography with intramolecular charge transfer probes transiently bound to amyloid fibrils to investigate the organization of fibril nanostructures and probe binding configurations. Besides the in-plane (θ ≈ 90°) mode for binding on the fibril surface parallel to the long fibril axis, we also observed a sizable population of over 60% out-of-plane (θ < 60°) dipoles for rotor probes experiencing a varying degree of orientational mobility. Highly confined dipoles exhibiting an out-of-plane configuration probably reflect tightly bound dipoles in the inner channel grooves, while the weakly bound ones on amyloid enjoy rotational flexibility. Our observation of an out-of-plane binding mode emphasizes the pivotal role played by the electron donor amino group toward fluorescence detection and hence the emergence of anchored probes alongside conventional groove binders.
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Affiliation(s)
- Aranyak Sarkar
- Radiation & Photochemistry Division, Bhabha Atomic Research Center, Mumbai 400085, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Vinu Namboodiri
- Radiation & Photochemistry Division, Bhabha Atomic Research Center, Mumbai 400085, India
| | - Manoj Kumbhakar
- Radiation & Photochemistry Division, Bhabha Atomic Research Center, Mumbai 400085, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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Kikuchi K, Adair LD, Lin J, New EJ, Kaur A. Photochemical Mechanisms of Fluorophores Employed in Single-Molecule Localization Microscopy. Angew Chem Int Ed Engl 2023; 62:e202204745. [PMID: 36177530 PMCID: PMC10100239 DOI: 10.1002/anie.202204745] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Indexed: 02/02/2023]
Abstract
Decoding cellular processes requires visualization of the spatial distribution and dynamic interactions of biomolecules. It is therefore not surprising that innovations in imaging technologies have facilitated advances in biomedical research. The advent of super-resolution imaging technologies has empowered biomedical researchers with the ability to answer long-standing questions about cellular processes at an entirely new level. Fluorescent probes greatly enhance the specificity and resolution of super-resolution imaging experiments. Here, we introduce key super-resolution imaging technologies, with a brief discussion on single-molecule localization microscopy (SMLM). We evaluate the chemistry and photochemical mechanisms of fluorescent probes employed in SMLM. This Review provides guidance on the identification and adoption of fluorescent probes in single molecule localization microscopy to inspire the design of next-generation fluorescent probes amenable to single-molecule imaging.
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Affiliation(s)
- Kai Kikuchi
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Melbourne, VIC 305, Australia.,School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia.,The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia
| | - Liam D Adair
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.,School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.,Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Jiarun Lin
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.,School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Elizabeth J New
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.,School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.,Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Amandeep Kaur
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Melbourne, VIC 305, Australia.,School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia.,The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia
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Siemer AB. What makes functional amyloids work? Crit Rev Biochem Mol Biol 2022; 57:399-411. [PMID: 35997712 PMCID: PMC9588633 DOI: 10.1080/10409238.2022.2113030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 06/29/2022] [Accepted: 08/10/2022] [Indexed: 01/27/2023]
Abstract
Although first described in the context of disease, cross-β (amyloid) fibrils have also been found as functional entities in all kingdoms of life. However, what are the specific properties of the cross-β fibril motif that convey biological function, make them especially suited for their particular purpose, and distinguish them from other fibrils found in biology? This review approaches these questions by arguing that cross-β fibrils are highly periodic, stable, and self-templating structures whose formation is accompanied by substantial conformational change that leads to a multimerization of their core and framing sequences. A discussion of each of these properties is followed by selected examples of functional cross-β fibrils that show how function is usually achieved by leveraging many of these properties.
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Affiliation(s)
- Ansgar B Siemer
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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