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Samui S, Biswas S, Basak S, Ghosh S, Muniyappa K, Naskar J. De novo designed aliphatic and aromatic peptides assemble into amyloid-like cytotoxic supramolecular nanofibrils. RSC Adv 2024; 14:4382-4388. [PMID: 38304566 PMCID: PMC10831423 DOI: 10.1039/d3ra07869h] [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: 11/17/2023] [Accepted: 01/16/2024] [Indexed: 02/03/2024] Open
Abstract
Peptides are very interesting biomolecules that upon self-association form a variety of thermodynamically stable supramolecular structures of nanometric dimension e.g. nanotubes, nanorods, nanovesicles, nanofibrils, nanowires and many others. Herein, we report six peptide molecules having a general chemical structure, H-Gaba-X-X-OH (Gaba: γ-aminobutyric acid, X: amino acid). Out of these six peptides, three are aromatic and the others are aliphatic. Atomic force microscopic (AFM) studies reveal that except peptide 6 (H-Gaba-Trp-Trp-OH), all the reported peptides adopt nanofibrillar morphology upon aggregation in aqueous medium. These supramolecular assemblies can recognize amyloid-specific molecular probe congo red (CR) and thioflavine t (ThT) and exhibit all the characteristic properties of amyloids. The MTT cell viability assay reveals that the toxicity of both aliphatic and aromatic peptides increases with increasing concentration of the peptides to both cancer (HeLa) and non-cancer (HEK 293) cells. Of note, the aromatic peptides show a slightly higher cytotoxic effect compared to the aliphatic peptides. Overall, the studies highlight the self-assembling nature of the de novo designed aliphatic and aromatic peptides and pave the way towards elucidating the intricacies of pathogenic amyloid assemblies.
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Affiliation(s)
- Satyabrata Samui
- Department of Biochemistry and Biophysics, University of Kalyani Nadia WB 741235 India
| | - Soumi Biswas
- Department of Biochemistry and Biophysics, University of Kalyani Nadia WB 741235 India
| | - Shubhanwita Basak
- Department of Biochemistry and Biophysics, University of Kalyani Nadia WB 741235 India
| | - Shreya Ghosh
- Department of Biochemistry and Biophysics, University of Kalyani Nadia WB 741235 India
| | - K Muniyappa
- Department of Biochemistry, Indian Institute of Science Bangalore Karnataka 560 012 India
| | - Jishu Naskar
- Department of Biochemistry and Biophysics, University of Kalyani Nadia WB 741235 India
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2
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Scheller L, Bachmann S, Zorn T, Hanio S, Gbureck U, Fatouros D, Pöppler AC, Meinel L. Solid microemulsion preconcentrates on pH responsive metal-organic framework for tableting. Eur J Pharm Biopharm 2023; 186:105-111. [PMID: 36963469 DOI: 10.1016/j.ejpb.2023.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/26/2023]
Abstract
Poorly water-soluble drugs are frequently formulated with lipid-based formulations including microemulsions and their preconcentrates. We detailed the solidification of drug-loaded microemulsion preconcentrates with the acid-sensitive metal-organic framework ZIF-8 by X-ray powder diffraction and solid-state nuclear magnetic resonance spectroscopy. Adsorption and desorption dynamics were analyzed by fluorescence measurement, high-performance liquid chromatography, dynamic light scattering and 1H-DOSY experiments using the model compounds Nile Red, Vitamin K1, and Lumefantrine. Preconcentrates and drugs were successfully loaded onto ZIF-8 while preserving its crystal structure. The solid powder was pressable to tablets or 3D-printed into oral dosage forms. At low pH, colloidal solutions readily formed, solubilizing the poorly water-soluble compounds. The use of stimuli-responsive metal organic frameworks as carriers for the oral delivery of lipid-based formulations points towards solid dosage forms readily forming colloidal microemulsions.
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Affiliation(s)
- Lena Scheller
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074, Wuerzburg, Germany
| | - Stephanie Bachmann
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Theresa Zorn
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Simon Hanio
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074, Wuerzburg, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University of Wuerzburg, Pleicherwall, 2, DE-97070 Wuerzburg, Germany
| | - Dimitrios Fatouros
- School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Lorenz Meinel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074, Wuerzburg, Germany; Helmholtz Institute for RNA-based Infection Research (HIRI), Josef-Schneider-Strasse, 2, 97080 Wuerzburg, Germany.
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3
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Chicea D, Olaru S. Profiling Particles of Sahara Dust Settled on the Ground by a Simplified Dynamic Light Scattering Procedure and Sedimentation. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4860. [PMID: 36981769 PMCID: PMC10048865 DOI: 10.3390/ijerph20064860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
Dust particles exist in the form of mineral aerosols and play a significant role in climate change patterns, while also having the potential to affect human health. The size of these particles is crucial, as it determines the atmosphere's albedo. In the past few years, a Saharan dust cloud has moved and arrived above Romania during spring, followed by rain containing the dust particles, which are deposited on various objects. We collected these particles in an aqueous suspension and employed natural sedimentation to separate them by density. We then conducted a dynamic light scattering (DLS) experiment to analyze their size. Our DLS setup was straightforward, and the time series analysis involved evaluating the frequency spectrum of the scattered light intensity-also known as the power spectrum-filtering it, and fitting the expected Lorentzian line to it to determine the parameters and the average diameter of the suspended particles. We found that the dust particles had a continuous distribution, with the biggest particles having a diameter around 1100 nm. The results obtained from the combination of sedimentation and DLS are consistent with reports on the size of Saharan dust particles in other regions of Europe.
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Affiliation(s)
- Dan Chicea
- Department of Environmental Sciences, Lucian Blaga University of Sibiu, Dr. Ion Ratiu Str., no 5-7, 550012 Sibiu, Romania
- Research Center for Complex Physical Systems, Faculty of Sciences, Lucian Blaga University of Sibiu, Dr. Ion Ratiu Str., no 5-7, 550012 Sibiu, Romania
| | - Sorin Olaru
- Department of Environmental Sciences, Lucian Blaga University of Sibiu, Dr. Ion Ratiu Str., no 5-7, 550012 Sibiu, Romania
- Research Center for Complex Physical Systems, Faculty of Sciences, Lucian Blaga University of Sibiu, Dr. Ion Ratiu Str., no 5-7, 550012 Sibiu, Romania
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4
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Kim B, Hosn RR, Remba T, Yun D, Li N, Abraham W, Melo MB, Cortes M, Li B, Zhang Y, Dong Y, Irvine DJ. Optimization of storage conditions for lipid nanoparticle-formulated self-replicating RNA vaccines. J Control Release 2023; 353:241-253. [PMID: 36414195 PMCID: PMC9708520 DOI: 10.1016/j.jconrel.2022.11.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 11/03/2022] [Accepted: 11/13/2022] [Indexed: 12/03/2022]
Abstract
The recent clinical success of multiple mRNA-based SARS-CoV-2 vaccines has proven the potential of RNA formulated in lipid nanoparticles (LNPs) in humans, and products based on base-modified RNA, sequence-optimized RNA, and self-replicating RNAs formulated in LNPs are all in various stages of clinical development. However, much remains to be learned about critical parameters governing the manufacturing and use of LNP-RNA formulations. One important issue that has received limited attention in the literature to date is the identification of optimal storage conditions for LNP-RNA that preserve long-term activity of the formulations. Here, we analyzed the physical structure, in vivo expression characteristics, and functional activity of alphavirus-derived self-replicating RNA (repRNA)-loaded LNPs encoding HIV vaccine antigens following storage in varying temperatures, buffers, and in the presence or absence of cryoprotectants. We found that for lipid nanoparticles with compositions similar to clinically-used LNPs, storage in RNAse-free PBS containing 10% (w/v) sucrose at -20 °C was able to maintain vaccine stability and in vivo potency at a level equivalent to freshly prepared vaccines following 30 days of storage. LNPs loaded with repRNA could also be lyophilized with retention of bioactivity.
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Affiliation(s)
- Byungji Kim
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ryan R Hosn
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Tanaka Remba
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Dongsoo Yun
- Nanotechnology Materials Core, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Na Li
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Wuhbet Abraham
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Mariane B Melo
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Manuel Cortes
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Bridget Li
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yuebao Zhang
- Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Yizhou Dong
- Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States; Department of Biomedical Engineering, The Center for Clinical and Translational Science, The Comprehensive Cancer Center, Dorothy M. Davis Heart & Lung Research Institute, Department of Radiation Oncology, Center for Cancer Engineering, Center for Cancer Metabolism, Pelotonia Institute for Immune-Oncology, The Ohio State University, Columbus, OH 43210, United States
| | - Darrell J Irvine
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Departments of Biological Engineering and Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02139, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA.
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5
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Singh G, Singh VR, Pandey SP, Singh PK. Sulfated-β-cyclodextrin templated aggregation of a metachromatic dye, Basic Orange 21: A photophysical investigation. Supramol Chem 2022. [DOI: 10.1080/10610278.2022.2046277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gaurav Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Um-dae Centre for Excellence in Basic Sciences, University of Mumbai, Mumbai, India
| | - Vidya R. Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Shrishti P. Pandey
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Amity Institute of Biotechnology, Amity University, Mumbai-Pune Expressway, Mumbai, INDIA
| | - Prabhat K. Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Training School Complex, Mumbai, India
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6
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Geue N, Winpenny REP, Barran PE. Structural characterisation methods for supramolecular chemistry that go beyond crystallography. Chem Soc Rev 2021; 51:8-27. [PMID: 34817479 DOI: 10.1039/d0cs01550d] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Supramolecular chemistry has grown rapidly over the past three decades, yet synthetic supramolecular chemists still face several challenges when it comes to characterising their compounds. In this review, we present an introduction to structural characterisation techniques commonly used for non-crystalline supramolecular molecules, e.g. nuclear magnetic and electron paramagnetic resonance spectroscopy (NMR and EPR), mass spectrometry (MS), ion mobility mass spectrometry (IM-MS), small-angle neutron and X-ray scattering (SANS and SAXS) as well as cryogenic transmission electron microscopy (cryo-TEM). We provide an overview of their fundamental concepts based on case studies from different fields of supramolecular chemistry, e.g. interlocked structures, molecular self-assembly and host-guest chemistry, while focussing on particular strengths and weaknesses of the discussed methods. Additionally, three multi-technique case studies are examined in detail to illustrate the benefits of using complementary techniques simultaneously.
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Affiliation(s)
- Niklas Geue
- Michael Barber Centre for Collaborative Mass Spectrometry, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Richard E P Winpenny
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Perdita E Barran
- Michael Barber Centre for Collaborative Mass Spectrometry, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK.
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Kabata Glowacki S, Koszinowski K, Hübner D, Frauendorf H, Vana P, Diederichsen U. Supramolecular Self-Assembly of β 3 -Peptides Mediated by Janus-Type Recognition Units. Chemistry 2020; 26:12145-12149. [PMID: 32621556 PMCID: PMC7539953 DOI: 10.1002/chem.202003107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Indexed: 01/18/2023]
Abstract
To gain mechanistic insights, natural systems with biochemical relevance are inspiring for the creation of new biomimetics with unique properties and functions. Despite progress in rational design and protein engineering, folding and intramolecular organization of individual components into supramolecular structures remains challenging and requires controlled methods. Foldamers, such as β-peptides, are structurally well defined with rigid conformations and suitable for the specific arrangement of recognition units. Herein, we show the molecular arrangement and aggregation of β3 -peptides into a hexameric helix bundle. For this purpose, β-amino acid side chains were modified with cyanuric acid and triamino-s-triazine as complementary recognition units. The pre-organization of the β3 -peptides leads these Janus molecule pairs into a hexameric arrangement and a defined rosette nanotube by stacking. The helical conformation of the subunits was indicated by circular dichroism spectroscopy, while the supramolecular arrangement was detected by dynamic light scattering and confirmed by high-resolution electrospray ionization mass spectrometry (ESI-HRMS).
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Affiliation(s)
- Selda Kabata Glowacki
- Institute of Organic and Biomolecular ChemistryGeorg-August-University GöttingenTammannstrasse 237077GöttingenGermany
- Center for Biostructural Imaging of Neurodegeneration (cfBIN)University Medical Center Göttingenvon-Sieboldstrasse 3a37075GöttingenGermany
| | - Konrad Koszinowski
- Institute of Organic and Biomolecular ChemistryGeorg-August-University GöttingenTammannstrasse 237077GöttingenGermany
| | - Dennis Hübner
- Institute of Physical ChemistryGeorg-August-University GöttingenTammannstrasse 637077GöttingenGermany
| | - Holm Frauendorf
- Institute of Organic and Biomolecular ChemistryGeorg-August-University GöttingenTammannstrasse 237077GöttingenGermany
| | - Philipp Vana
- Institute of Physical ChemistryGeorg-August-University GöttingenTammannstrasse 637077GöttingenGermany
| | - Ulf Diederichsen
- Institute of Organic and Biomolecular ChemistryGeorg-August-University GöttingenTammannstrasse 237077GöttingenGermany
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Jordan JH, Easson MW, Condon BD. Cellulose hydrolysis using ionic liquids and inorganic acids under dilute conditions: morphological comparison of nanocellulose. RSC Adv 2020; 10:39413-39424. [PMID: 35515368 PMCID: PMC9057393 DOI: 10.1039/d0ra05976e] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/22/2020] [Indexed: 01/20/2023] Open
Abstract
The preparation of cellulose nanocrystals (CNCs) from cellulose extracted from cotton gin motes (CGM) using an ionic liquid (1-butyl-3-methylimidazolium chloride, [BMIm]Cl) under dilute conditions is reported. The concurrent process involves minimal swelling of cellulose with an ionic liquid and hydrolysis of the cellulose initiated by the addition of either phosphoric (H3PO4), hydrochloric (HCl), or sulfuric (H2SO4) acid. The obtained nanocrystals had similar physical properties (e.g. crystallinity) to the counterparts prepared under conventional conditions and exhibited superior thermal properties for sulfate CNCs. Additionally, the obtained CNCs had low surface functionalization, yet were colloidally stable for >90 days, which is a desirable trait for post-functionalization of CNCs. This process represents a general strategy utilizing dilute ionic liquids in the preparation of nanocellulose under mildly acidic conditions. Cellulose nanocrystals prepared with 1-butyl-3-methylimidazolium chloride ([BMIm]Cl) and HCl, H2SO4, or H3PO4 in a one-pot process under dilute conditions are investigated for changes in CNC dimensions, crystallinity, and thermal stability.![]()
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Affiliation(s)
- Jacobs H. Jordan
- USDA
- Agricultural Research Service
- Southern Regional Research Center
- New Orleans
- USA
| | - Michael W. Easson
- USDA
- Agricultural Research Service
- Southern Regional Research Center
- New Orleans
- USA
| | - Brian D. Condon
- USDA
- Agricultural Research Service
- Southern Regional Research Center
- New Orleans
- USA
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