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Chai J, Zhao X, Xu Y, Xu X. An unfolding/ aggregation kinetic instructed rational design towards improving graft degree of glycation for myofibrillar protein. Food Chem 2024; 446:138876. [PMID: 38432134 DOI: 10.1016/j.foodchem.2024.138876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/10/2024] [Accepted: 02/25/2024] [Indexed: 03/05/2024]
Abstract
Glycation is an effective strategy for the application of myofibrillar protein (MP) in beverage formulas by improving water solubility. In conventional glycation, the efficiency was limited as MP-saccharides conjugates mostly produced at low temperature due to thermosensitivity. This study was aimed to explore unfolding/aggregation kinetics of MP, including aggregate behavior, structural characteristics, and micromorphology, which guided the selection of temperature for glycation. It was shown that 40 °C/47.5 °C were critical temperature for MP unfolding/aggregation, respectively. Accordingly, an innovative technology of glycation (cyclic continuous glycation, CCG) was established by combining such temperatures. The results confirmed that cyclic continuous heating (CCH) inhibited excessive exposure of sulfhydryl and hydrophobic groups impeding protein aggregation. Importantly, it was revealed that rational designed CCG promoted covalent binding of MP to glucose by regulating unfolding-aggregation balance, exhibiting higher glycation degree. Overall, CCG-modified MP is expected to motivate the application of meat proteins in food formulations.
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Affiliation(s)
- Jiale Chai
- Key Laboratory of Meat Processing, Ministry of Agriculture, State Key Lab of Meat Quality Control and Cultured Meat Development, Ministry of Science and Technology, Jiangsu Collaborative Innovation Center of Meat Production and Processing, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Xue Zhao
- Key Laboratory of Meat Processing, Ministry of Agriculture, State Key Lab of Meat Quality Control and Cultured Meat Development, Ministry of Science and Technology, Jiangsu Collaborative Innovation Center of Meat Production and Processing, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.
| | - Yujuan Xu
- Key Laboratory of Meat Processing, Ministry of Agriculture, State Key Lab of Meat Quality Control and Cultured Meat Development, Ministry of Science and Technology, Jiangsu Collaborative Innovation Center of Meat Production and Processing, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Xinglian Xu
- Key Laboratory of Meat Processing, Ministry of Agriculture, State Key Lab of Meat Quality Control and Cultured Meat Development, Ministry of Science and Technology, Jiangsu Collaborative Innovation Center of Meat Production and Processing, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
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2
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Wang X, Wang Y, Wang X, Xing Y, Kuang C, Luo K, Cheng Y, Wang S. Influence of substrate aggregation state on the enzymatic-induced crosslinking of soy protein isolate. Food Chem 2024; 442:138484. [PMID: 38271913 DOI: 10.1016/j.foodchem.2024.138484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 10/26/2023] [Accepted: 01/15/2024] [Indexed: 01/27/2024]
Abstract
Transglutaminase (TGase) induced-crosslinking of soy protein isolate (SPI) was markedly influenced by the substrate aggregation state. Results showed that appropriate heating significantly accelerated the TGase crosslinking, and the 7S and 11S acidic subunits were more susceptible to the enzyme than the 11S basic proteins. The content of ε-(γ-glutamyl)-lysine isopeptide bonds increased from 4.74 to 8.61 μmol/g protein when the heating intensity was increased from 75 °C for 15 min to 95 °C for 30 min, due to sufficient unfolding of the protein structure. Rheological data indicated that the gel formed from the SPI heated at 95 °C for 30 min exhibited the best properties, with a 60 % increase in the storage modulus compared with the unheated sample. However, excessive heating (95 °C, 60-120 min) caused severe aggregation of SPI and formation of insoluble aggregates, resulting in poor crosslinking efficiency and weaker gel properties.
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Affiliation(s)
- Xufeng Wang
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha, Hunan, China
| | - Yuqi Wang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, China
| | - Xiongshi Wang
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha, Hunan, China
| | - Yunhao Xing
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha, Hunan, China
| | - Chuyu Kuang
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
| | - Kaiyun Luo
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
| | - Yunhui Cheng
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha, Hunan, China
| | - Shaoyun Wang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, China
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3
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Abbasi A, Qi L, Chen G. Transport of nanoscale zero-valent iron in the presence of rhamnolipid. Sci Total Environ 2024; 927:172279. [PMID: 38588747 DOI: 10.1016/j.scitotenv.2024.172279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/04/2024] [Accepted: 04/04/2024] [Indexed: 04/10/2024]
Abstract
Nanoscale zero-valent iron (nZVI) particles have gained widespread use for in-situ treatment of various chlorinated hydrocarbons. Their non-toxic nature, affordability, and minimal maintenance requirements have made them a favored material for nanoremediation. The treatment typically involves the injection of nZVI particles into contaminated sites using direct-push well injection systems. However, their small size leads to high surface energy, causing aggregation that alters their physiochemical properties, reactivity, and transport behavior. To counteract aggregation, nZVI suspension can be stabilized with different surfactants, reducing the surface energy during subsurface soil transport. This study investigates the impact of rhamnolipid, a biosurfactant produced by Pseudomonas aeruginosa during the late growth phase, on the aggregation and mobility of nZVI particles. The retardation factor of nZVI in the model media of zeolite, ZK406H, decreased from 1.66 in the absence of rhamnolipid to 1.03, 0.98, 0.93, and 0.87, corresponding to the presence of rhamnolipid at concentrations of 20, 50, 80, and 100 mg/L. The deposition coefficient also decreased from 2.39 in the absence of rhamnolipid to 0.459, 0.279, 0.217, and 0.0966, corresponding to the presence of rhamnolipid at concentrations of 20, 50, 80, and 100 mg/L. The transport parameters of nZVI in ZK406H were linked to the interactions of nZVI particles with ZK406H by the DLVO theory.
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Affiliation(s)
- Alireza Abbasi
- Department of Civil and Environmental Engineering, Florida State University, Tallahassee, FL 32310, United States of America.
| | - Lin Qi
- Department of Civil and Environmental Engineering, Florida State University, Tallahassee, FL 32310, United States of America
| | - Gang Chen
- Department of Civil and Environmental Engineering, Florida State University, Tallahassee, FL 32310, United States of America
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4
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Pérez-Pacheco A, Ramírez-Chavarría RG, Colín-García MP, Cortés-Ortegón FDC, Quispe-Siccha RM, Martínez‑Tovar A, Olarte‑Carrillo I, Polo-Parada L, Gutiérrez-Juárez G. Study of erythrocyte sedimentation in human blood through the photoacoustic signals analysis. Photoacoustics 2024; 37:100599. [PMID: 38495950 PMCID: PMC10940783 DOI: 10.1016/j.pacs.2024.100599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/22/2023] [Accepted: 02/26/2024] [Indexed: 03/19/2024]
Abstract
Introduction In this study, we utilized the pulsed photoacoustic (PA) technique to analyze globular sedimentation in whole human blood, with a focus on distinguishing between healthy individuals and those with hemolytic anemia. Methods Blood samples were collected from both healthy individuals (women and men) and those with hemolytic anemia, and temporal and spectral parameters of PA signals were employed for analysis. Results Significant differences (p < 0.05) were observed in PA metrics between the two groups. The proposed spectral analysis allowed significant differentiation within a 25-minute measurement window. Anemic blood samples exhibited higher erythrocyte sedimentation rate (ESR) values, indicating increased erythrocyte aggregation. Discussion This study underscores the potential of PA signal analysis in ESR assessment as an efficient method for distinguishing between healthy and anemic blood, surpassing traditional approaches. It represents a promising contribution to the development of precise and sensitive techniques for analyzing human blood samples in clinical settings.
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Affiliation(s)
- Argelia Pérez-Pacheco
- Unidad de Investigación y Desarrollo Tecnológico (UIDT), Hospital General de México, Dr. Eduardo Liceaga, Ciudad de México 06726, Mexico
| | | | - Marco Polo Colín-García
- Instituto de Ciencias Aplicadas y Tecnología (ICAT), Universidad Nacional Autónoma de México, Apartado Postal 70‑186, Ciudad de México 04510, Mexico
| | - Flor del Carmen Cortés-Ortegón
- Instituto de Ciencias Aplicadas y Tecnología (ICAT), Universidad Nacional Autónoma de México, Apartado Postal 70‑186, Ciudad de México 04510, Mexico
| | - Rosa María Quispe-Siccha
- Unidad de Investigación y Desarrollo Tecnológico (UIDT), Hospital General de México, Dr. Eduardo Liceaga, Ciudad de México 06726, Mexico
| | - Adolfo Martínez‑Tovar
- Laboratorio de Biología Molecular, Servicio de Hematología, Hospital General de México, Dr. Eduardo Liceaga, Ciudad de México 06726, Mexico
| | - Irma Olarte‑Carrillo
- Laboratorio de Biología Molecular, Servicio de Hematología, Hospital General de México, Dr. Eduardo Liceaga, Ciudad de México 06726, Mexico
| | - Luis Polo-Parada
- Department of Medical Pharmacology and Physiology and Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO 65211, USA
| | - Gerardo Gutiérrez-Juárez
- Departamento de Ingeniería Física, División de Ciencias e Ingenierías, Universidad de Guanajuato-Campus León, León, Guanajuato C.P. 37150, Mexico
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5
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Wang Q, Wang Z, Wang Z, Duan Y, Guo H, Liang Y, Zhang X, Zhang Y, Wang J. Effect of high-molecular-weight glutenin subunits silencing on dough aggregation characteristics. Food Chem 2024; 441:138371. [PMID: 38218148 DOI: 10.1016/j.foodchem.2024.138371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 12/21/2023] [Accepted: 01/04/2024] [Indexed: 01/15/2024]
Abstract
The qualities of wheat dough are influenced by the high-molecular-weight glutenin subunits (HMW-GS), a critical component of wheat gluten protein. However, it is still unknown how HMW-GS silencing affects the aggregation characteristics of dough. Two groups of near-isogenic wheat were used to study the effects of HMW-GS silencing on dough aggregation characteristics, dough texture characteristics, and dough microstructure. It was observed that the content of gliadin in LH-11 strain significantly increased compared to the wild-type (WT). Additionally, the amount of glutenin macropolymer and the glutenin/gliadin both decreased. The aggregation characteristics and rheological characteristics of the dough in LH-11 strain were significantly reduced, and the content of β-sheet in the dough was significantly reduced. The HMW-GS silencing resulted in a reduction in the aggregation of the gluten network in the dough, which related to the alteration of the secondary and microstructure of the gluten.
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Affiliation(s)
- Qi Wang
- The National Engineering Laboratory for Wheat & Corn Further Processing, Henan University of Technology, Zhengzhou 450001, China; School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Zhicheng Wang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Zehao Wang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yaqian Duan
- School of International Education, Henan University of Technology, Zhengzhou 450001, China
| | - Haimei Guo
- School of International Education, Henan University of Technology, Zhengzhou 450001, China
| | - Ying Liang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Xia Zhang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yingjun Zhang
- Institute of Cereal and Oil Crops, Hebei Academy of Agriculture and Forestry Sciences, Laboratory of Crop Genetics and Breeding of Hebei, Shijiazhuang 050035, China.
| | - Jinshui Wang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China.
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Tan S, Wu L, Liu J, Wu Z, Cheng Q, Qu Q, Zhu L, Yan Y, Wu H, Ling TJ, Liu RT, Yang S. Quercetin-3-O-glc-1-3-rham-1-6-glucoside decreases Aβ production, inhibits Aβ aggregation and neurotoxicity, and prohibits the production of inflammatory cytokines. Eur J Pharmacol 2024; 970:176491. [PMID: 38503399 DOI: 10.1016/j.ejphar.2024.176491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 01/24/2024] [Accepted: 03/11/2024] [Indexed: 03/21/2024]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease with the hallmark of aggregation of beta-amyloid (Aβ) into extracellular fibrillar deposition. Accumulating evidence suggests that soluble toxic Aβ oligomers exert diverse roles in neuronal cell death, oxidative stress, neuroinflammation, and the eventual pathogenesis of AD. Aβ is derived from the sequential cleavage of amyloid-β precursor protein (APP) by β-secretase (BACE1) and γ-secretase. The current effect of single targeting is not ideal for the treatment of AD. Therefore, developing multipotent agents with multiple properties, including anti-Aβ generation and anti-Aβ aggregation, is attracting more attention for AD treatment. Previous studies indicated that Quercetin was able to attenuate the effects of several pathogenetic factors in AD. Here, we showed that naturally synthesized Quercetin-3-O-glc-1-3-rham-1-6-glucoside (YCC31) could inhibit Aβ production by reducing β-secretase activity. Further investigations indicated that YCC31 could suppress toxic Aβ oligomer formation by directly binding to Aβ. Moreover, YCC31 could attenuate Aβ-mediated neuronal death, ROS and NO production, and pro-inflammatory cytokines release. Taken together, YCC31 targeting multiple pathogenetic factors deserves further investigation for drug development of AD.
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Affiliation(s)
- Shuo Tan
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Linmei Wu
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Jiayi Liu
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Zhaoyuan Wu
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Qiang Cheng
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Qiuhao Qu
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Lianghao Zhu
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Yizhu Yan
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Hao Wu
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Tie-Jun Ling
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036, China
| | - Rui-Tian Liu
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Shigao Yang
- School of Basic Medical Sciences, School of Life Sciences, Anhui Medical University, Hefei, 230032, China.
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7
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Huang B, Li JM, Zang XM, Wang M, Pan W, Zhang KD, He H, Tan QG, Miao AJ. Cell-excreted proteins mediate the interactions of differently sized silica nanoparticles during cellular uptake. J Hazard Mater 2024; 469:133894. [PMID: 38452668 DOI: 10.1016/j.jhazmat.2024.133894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 02/15/2024] [Accepted: 02/24/2024] [Indexed: 03/09/2024]
Abstract
Exposure to different types of nanoparticles (NPs) results in their deposition in human bodies. While most studies have examined the cellular uptake of only one type of NP at a time, how the dynamics of NP uptake may change in the presence of other types of NPs remains unclear. We therefore investigated the interplay of two differently sized SiO2 NPs during their uptake by A549 human lung carcinoma cells. Both NPs contained a CdSeTe core, which was labeled with different Cd isotopes to differentiate between them. Our study showed that the uptake of one size of SiO2 NPs either increased or decreased with the concentration of the other size of SiO2 NPs. This variation in uptake was attributable to the concentration-dependent aggregation of SiO2 NPs, as determined by the amount of cell-excreted proteins adsorbed on the NP surface. Further, the effects of the protein corona on the attachment of SiO2 NPs to the cell surface and uptake competition between differently sized SiO2 NPs also played important roles. Cell-excreted proteins were then analyzed by proteomics. Overall, the complex interactions between coexisting NPs of different physicochemical properties and cell-excreted proteins should be considered during bio-applications and bio-safety evaluations of NPs.
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Affiliation(s)
- Bin Huang
- Jiangsu Open Laboratory of Major Scientific Instrument and Equipment, Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, School of Environment, Nanjing Normal University, Nanjing 210023, PR China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, PR China
| | - Jia-Ming Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, PR China
| | - Xiao-Mei Zang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, PR China
| | - Mei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, PR China
| | - Wei Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, PR China
| | - Ke-Da Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, PR China
| | - Huan He
- Jiangsu Open Laboratory of Major Scientific Instrument and Equipment, Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, School of Environment, Nanjing Normal University, Nanjing 210023, PR China
| | - Qiao-Guo Tan
- Key Laboratory of the Coastal and Wetland Ecosystems of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, PR China
| | - Ai-Jun Miao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, PR China.
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Mazzini G, Le Foll C, Boyle CN, Garelja ML, Zhyvoloup A, Miller MET, Hay DL, Raleigh DP, Lutz TA. The processing intermediate of human amylin, pro-amylin(1-48), has in vivo and in vitro bioactivity. Biophys Chem 2024; 308:107201. [PMID: 38452520 DOI: 10.1016/j.bpc.2024.107201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/31/2024] [Accepted: 02/13/2024] [Indexed: 03/09/2024]
Abstract
Amylin is released by pancreatic beta-cells in response to a meal and its major soluble mature form (37 amino acid-peptide) produces its biological effects by activating amylin receptors. Amylin is derived from larger propeptides that are processed within the synthesizing beta-cell. There are suggestions that a partially processed form, pro-amylin(1-48) is also secreted. We tested the hypothesis that pro-amylin(1-48) has biological activity and that human pro-amylin(1-48) may also form toxic pre-amyloid species. Amyloid formation, the ability to cross-seed and in vitro toxicity were similar between human pro-amylin(1-48) and amylin. Human pro-amylin(1-48) was active at amylin-responsive receptors, though its potency was reduced at rat, but not human amylin receptors. Pro-amylin(1-48) was able to promote anorexia by activating neurons of the area postrema, amylin's primary site of action, indicating that amylin can tolerate significant additions at the N-terminus without losing bioactivity. Our studies help to shed light on the possible roles of pro-amylin(1-48) which may be relevant for the development of future amylin-based drugs.
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Affiliation(s)
- Giulia Mazzini
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Christelle Le Foll
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Christina N Boyle
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Michael L Garelja
- Department of Pharmacology and Toxicology, University of Otago, New Zealand
| | - Alexander Zhyvoloup
- Research Department of Structural and Molecular Biology, University College London, UK
| | | | - Debbie L Hay
- Department of Pharmacology and Toxicology, University of Otago, New Zealand.
| | - Daniel P Raleigh
- Research Department of Structural and Molecular Biology, University College London, UK; Department of Chemistry, Stony Brook University, USA; Laufer Center for Quantitative Biology Stony Brook University, USA.
| | - Thomas A Lutz
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
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9
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Zeng L, Franks GV, Goudeli E. Aggregation and breakage dynamics of alumina particles under shear by coupled Computational Fluid Dynamics - Discrete Element Method. J Colloid Interface Sci 2024; 661:750-760. [PMID: 38325173 DOI: 10.1016/j.jcis.2024.01.210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 01/20/2024] [Accepted: 01/30/2024] [Indexed: 02/09/2024]
Abstract
HYPOTHESIS Shear affects simultaneous aggregation and fragmentation of fine particles. Understanding the effect of shear on the dynamics of particle aggregation and break-up is important to predict aggregate size and structure. It is hypothesized that there is a transition from pure breakage of large aggregates to regimes where restructuring and aggregation also play a role as aggregates become smaller. SIMULATIONS Here, aggregation and fragmentation dynamics of alumina particles are investigated under laminar shear flow using Discrete Element Method (DEM) coupled with Computational Fluid Dynamics (CFD). The effect of the shear rate on the aggregation and breakage rates is quantified accounting for particle-particle and particle-fluid interactions. FINDINGS High shear rates promote the formation of small, compact aggregates. The collision efficiency decreases with increasing shear rate following a power law for shear rates higher than 1250 s-1. The transition from the pure breakage limit to the region dominated by breakage and restructuring has been observed for the first time. The breakage rate decreases significantly as the transition occurs upon decreasing aggregate size. CFD-DEM-derived collision efficiency and breakage rate equations are proposed that can be readily employed in detailed population balance equation models for industrial particle process design.
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Affiliation(s)
- Lequan Zeng
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia; ARC Centre of Excellence for Enabling Eco-efficient Beneficiation of Minerals, The University of Melbourne, Parkville, VIC 3010, Australia
| | - George V Franks
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia; ARC Centre of Excellence for Enabling Eco-efficient Beneficiation of Minerals, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Eirini Goudeli
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia; ARC Centre of Excellence for Enabling Eco-efficient Beneficiation of Minerals, The University of Melbourne, Parkville, VIC 3010, Australia.
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10
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Yu J, Li W, Zhang D, Huang T, Tang H. Aggregation of graphene oxide upon the stripping of oxidized debris: An experimental and molecular dynamics simulation study. Environ Pollut 2024; 348:123884. [PMID: 38548155 DOI: 10.1016/j.envpol.2024.123884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 03/25/2024] [Accepted: 03/26/2024] [Indexed: 04/21/2024]
Abstract
The most recent structural study of graphene oxide (GO) indicates that the oxidized debris (ODs) adhered to as-prepared GO will strip in certain aquatic settings. The impact of ODs stripping on the characteristics of GO has been widely reported, but its effects on GO aggregation have received less attention. Here, the influence of OD stripping on the GO aggregation property was identified, and the aggregation of as-prepared GO and GO upon OD stripping was compared. Upon ODs stripping, the pKa values of GO shifted from 3.91, 6.25, and 9.84 to 4.54, 6.65, and 10.21, respectively. Further analysis indicated the removal of ODs reduced the net negative charge and improved the hydrophobicity of GO, hence promoting the aggregation of GO. The acceleration of GO-Ca2+-OD aggregate formation was facilitated by the collective effects of ODs stripping, functional group deprotonation, double layer compression, OD bridging, and charge neutralization. The metal ions and stripped ODs attach to GO edges and link GO, which perform like bridges and contribute to further aggregation. In general, the existence of ODs adds complexity to the constructions and characteristics of GO, and it is important to take this into account while evaluating the aggregation characteristic of GO-based materials.
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Affiliation(s)
- Jiahai Yu
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Wenli Li
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Dan Zhang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Tinglin Huang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Huan Tang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
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Duran T, Naik S, Sharifi L, DiLuzio WR, Chanda A, Chaudhuri B. Studying the ssDNA loaded adeno-associated virus aggregation using coarse-grained molecular dynamics simulations. Int J Pharm 2024; 655:123985. [PMID: 38484860 DOI: 10.1016/j.ijpharm.2024.123985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 03/05/2024] [Accepted: 03/07/2024] [Indexed: 03/19/2024]
Abstract
The aggregation of adeno-associated viral (AAV) capsids in an aqueous environment was investigated via coarse-grained molecular dynamics (CG-MD) simulations. The primary driving force and mechanism of the aggregation were investigated with or without single-strand DNA (ssDNA) loaded at various process temperatures. Capsid aggregation appeared to involve multiple residue interactions (i.e., hydrophobic, polar and charged residues) leading to complex protein aggregation. In addition, two aggregation mechanisms (i.e., the fivefold face-to-face contact and the edge-to-edge contact) were identified from this study. The ssDNA with its asymmetric structure could be the reason for destabilizing protein subunits and enhancing the interaction between the charged residues, and further result in the non-reversible face-to-face contact. At higher temperature, the capsid structure was found to be unstable with the significant size expansion of the loaded ssDNA which could be attributed to reduced number of intramolecular hydrogen bonds, the increased conformational deviations of protein subunits and the higher residue fluctuations. The CG-MD model was further validated with previous experimental and simulation data, including the full capsid size measurement and the capsid internal pressure. Thus, a good understanding of AAV capsid aggregation, instability and the role of ssDNA were revealed by applying the developed computational model.
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Affiliation(s)
- Tibo Duran
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, CT 06269, USA
| | - Shivangi Naik
- Technical Operations, Sarepta Therapeutics, Cambridge, MA 02142, USA
| | - Leila Sharifi
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, CT 06269, USA
| | - Willow R DiLuzio
- Technical Operations, Sarepta Therapeutics, Cambridge, MA 02142, USA
| | - Arani Chanda
- Technical Operations, Sarepta Therapeutics, Cambridge, MA 02142, USA
| | - Bodhisattwa Chaudhuri
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, CT 06269, USA; Department of Chemical & Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA; Institute of Material Sciences (IMS), University of Connecticut, Storrs, CT, USA.
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12
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Picoche C, Young WR, Barraquand F. Local intraspecific aggregation in phytoplankton model communities: spatial scales of occurrence and implications for coexistence. J Math Biol 2024; 88:68. [PMID: 38661851 DOI: 10.1007/s00285-024-02067-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/17/2023] [Accepted: 02/20/2024] [Indexed: 04/26/2024]
Abstract
The coexistence of multiple phytoplankton species despite their reliance on similar resources is often explained with mean-field models assuming mixed populations. In reality, observations of phytoplankton indicate spatial aggregation at all scales, including at the scale of a few individuals. Local spatial aggregation can hinder competitive exclusion since individuals then interact mostly with other individuals of their own species, rather than competitors from different species. To evaluate how microscale spatial aggregation might explain phytoplankton diversity maintenance, an individual-based, multispecies representation of cells in a hydrodynamic environment is required. We formulate a three-dimensional and multispecies individual-based model of phytoplankton population dynamics at the Kolmogorov scale. The model is studied through both simulations and the derivation of spatial moment equations, in connection with point process theory. The spatial moment equations show a good match between theory and simulations. We parameterized the model based on phytoplankters' ecological and physical characteristics, for both large and small phytoplankton. Defining a zone of potential interactions as the overlap between nutrient depletion volumes, we show that local species composition-within the range of possible interactions-depends on the size class of phytoplankton. In small phytoplankton, individuals remain in mostly monospecific clusters. Spatial structure therefore favours intra- over inter-specific interactions for small phytoplankton, contributing to coexistence. Large phytoplankton cell neighbourhoods appear more mixed. Although some small-scale self-organizing spatial structure remains and could influence coexistence mechanisms, other factors may need to be explored to explain diversity maintenance in large phytoplankton.
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Affiliation(s)
- Coralie Picoche
- Institute of Mathematics of Bordeaux, University of Bordeaux and CNRS, Talence, France
| | | | - Frédéric Barraquand
- Institute of Mathematics of Bordeaux, University of Bordeaux and CNRS, Talence, France.
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13
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Liu ZW, Tang PP, Zhang YX, Cheng JH, Aadil RM, Liu XB. Preventing thermal aggregation of ovalbumin through dielectric-barrier discharge plasma treatment and enhancing its emulsification properties. Int J Biol Macromol 2024; 267:131578. [PMID: 38641267 DOI: 10.1016/j.ijbiomac.2024.131578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/06/2024] [Accepted: 04/11/2024] [Indexed: 04/21/2024]
Abstract
The impact of Dielectric-Barrier Discharge (DBD) plasma treatment on the prevention of heat-induced aggregation of Ovalbumin (OVA) and improvement in emulsification properties was investigated. Results highlighted the effective inhibition of thermal aggregation of OVA following exposure to plasma. Structural analysis revealed that the plasma-induced oxidation of sulfhydryl and intermolecular disulfide bonds played a pivotal role in inhibiting the thermal aggregation, considered by Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis (SDS-PAGE), multiplies spectroscopy, and analysis of dynamic exchange of sulfhydryl-disulfide bonds. Meanwhile, the oxidation of exposed hydrophobic sites due to plasma treatment resulted in the transformation of the OVA molecule's surface from hydrophobic to hydrophilic, contributing significantly to the aggregation inhibition. Additionally, compared to an untreated sample of OVA, almost one-fold increase in emulsifying ability (EAI) and 1.5-fold in emulsifying stability (ESI) was observed after 4 min of plasma treatment. These findings demonstrated that plasma treatment not only enhanced the thermal stability of OVA, but also improved its emulsification properties.
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Affiliation(s)
- Zhi-Wei Liu
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China.
| | - Pan-Pan Tang
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Yi-Xuan Zhang
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Jun-Hu Cheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Rana Muhammad Aadil
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan.
| | - Xiu-Bin Liu
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China.
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14
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José Habib Moraes F, Torres Coimbra de Sá Balbina F, Procópio Alves L, Uchoa Fernandes A, Munin E. Avalanche-assisted transient optical phenomenon in aggregated toluidine blue dye. Spectrochim Acta A Mol Biomol Spectrosc 2024; 315:124291. [PMID: 38643559 DOI: 10.1016/j.saa.2024.124291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 03/18/2024] [Accepted: 04/12/2024] [Indexed: 04/23/2024]
Abstract
Pulse-modulated CW laser heat deposition modulates the darkness or the transparency of an aggregated medium in the high signal optical regimen. A recently reported work found that transient optical responses of molecular aggregates can be different depending on whether the sample is excited with a laser wavelength tuned within the absorption band of the monomer or within the absorption band of the aggregates. The different transient responses were attributed to different dynamic processes during the laser-induced disassembling of the molecular aggregates and may have implications in the field of organic electronics and optical devices, such as optical logical gates, optical power limiters and all-optical switching. In this paper laser beams with wavelengths of 663 nm and 532 nm were used to produce sudden changes in the thermodynamic equilibrium of the aggregation states of the ortho-toluidine blue dye, which allowed to observe the occurrence of the avalanche - mediated transient phenomenon in the laser-induced disassembling of ortho-toluidine blue (TBO) aggregates. A double exponential model was adjusted to the registered transient data. The obtained values for the fast components of the transient time responses of ortho-toluidine blue dye, for the studied concentrations, ranged from ∼ 6.5 to 9.5 ms at 532 nm, and from ∼ 43 to 48 ms at 663 nm. A single beam experiment was employed to evaluate the performance of the ortho-toluidine blue dye in a beam power-damping device, driven by the simultaneous and cooperative actions of the laser induced disassembling of aggregated dye units and the thermal lensing effect. It was found that the phenomenon of laser-induced dye disassembling of TBO, acting cooperatively with the thermal lensing effect, damps the laser beam power faster than the thermal lensing phenomenon alone. In addition, the results showed that the speed of the laser beam power-damping is dye dependent.
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Affiliation(s)
- Fernando José Habib Moraes
- Center for Biomedical Engineering, Anhembi Morumbi University (UAM), Rodovia Dr Altino Bondensan 500, São José dos Campos 12247-016, SP, Brazil
| | | | - Leandro Procópio Alves
- Center for Biomedical Engineering, Anhembi Morumbi University (UAM), Rodovia Dr Altino Bondensan 500, São José dos Campos 12247-016, SP, Brazil; Center of Innovation, Technology and Education (CITE), Rodovia Dr Altino Bondensan 500, São José dos Campos 12247-016, SP, Brazil
| | - Adjaci Uchoa Fernandes
- Center for Biomedical Engineering, Anhembi Morumbi University (UAM), Rodovia Dr Altino Bondensan 500, São José dos Campos 12247-016, SP, Brazil; Center of Innovation, Technology and Education (CITE), Rodovia Dr Altino Bondensan 500, São José dos Campos 12247-016, SP, Brazil
| | - Egberto Munin
- Center of Innovation, Technology and Education (CITE), Rodovia Dr Altino Bondensan 500, São José dos Campos 12247-016, SP, Brazil.
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15
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Heuser A, Abdul Rahman W, Bechter E, Blank J, Buhr S, Erdmann D, Fontana P, Mermet-Meillon F, Meyerhofer M, Strang R, Schrapp M, Zimmermann C, Cortes-Cros M, Möbitz H, Hamon J. Challenges for the Discovery of Non-Covalent WRN Helicase Inhibitors. ChemMedChem 2024; 19:e202300613. [PMID: 38334957 DOI: 10.1002/cmdc.202300613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/10/2024]
Abstract
The Werner Syndrome RecQ helicase (WRN) is a synthetic lethal target of interest for the treatment of cancers with microsatellite instability (MSI). Different hit finding approaches were initially tested. The identification of WRN inhibitors proved challenging due to a high propensity for artefacts via protein interference, i. e., hits inhibiting WRN enzymatic activities through multiple, unspecific mechanisms. Previously published WRN Helicase inhibitors (ML216, NSC19630 or NSC617145) were characterized in an extensive set of biochemical and biophysical assays and could be ruled out as specific WRN helicase probes. More innovative screening strategies need to be developed for successful drug discovery of non-covalent WRN helicase inhibitors.
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Affiliation(s)
- Alisa Heuser
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | | | - Elisabeth Bechter
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Jutta Blank
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Sylvia Buhr
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Dirk Erdmann
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Patrizia Fontana
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | | | - Marco Meyerhofer
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Ross Strang
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Maxime Schrapp
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | | | - Marta Cortes-Cros
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Henrik Möbitz
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
| | - Jacques Hamon
- Novartis Biomedical Research, Novartis Campus, CH-4056, Basel, Switzerland
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16
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Lee J. Development of quantitative structure activity relationships (QSARs) for predicting the aggregation of TiO 2 nanoparticles under favorable conditions. Heliyon 2024; 10:e27966. [PMID: 38571612 PMCID: PMC10987904 DOI: 10.1016/j.heliyon.2024.e27966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/08/2024] [Accepted: 03/08/2024] [Indexed: 04/05/2024] Open
Abstract
This study developed multi-linear regression (MLR) quantitative structure-activity relationships (QSARs) to predict n-TiO2 aggregation in the presence of high concentrations of representative emerging organic contaminants (EOCs), which presented favorable conditions to interaction with n-TiO2. The largest diameter change (Δ 517 nm at 0 h and Δ 1164 nm at 12 h) of n-TiO2 was observed by estrone, while the smallest diameter change (Δ -114 nm at 0 h and - 4 nm at 12 h) was observed by lincomycin during experimental periods. In addition, the zeta potential changes of n-TiO2 were observed that the biggest changes were observed by 17β-estradiol (-1.3 mV) and alachlor (-10.02 mV) at 0 h, while 17β-estradiol (-1.31 mV) and pendimethalin (-11.4 mV) showed the biggest changes at 12 h comparing to control. These changes of n-TiO2 diameter and zeta potential may implicate the effects of unique physico-chemical properties of each EOC on the surface modification of n-TiO2. Based on the interaction results, this study investigated the QSARs between n-TiO2 aggregation and physico-chemical descriptors of EOCs with 7 representative descriptors (pKa, Cw, log Kow, M.W., P.S.A., M.V., # of HBD) for predicting n-TiO2 aggregation rate kinetics at 0 h and 12 h by applying MATLAB statistical methods (model 1 - fitlm and model 2 - stepwiselm). In a model 1, QSARs showed the good coefficients of determination (R2 = 0.92) at 0 h and (R2 = 0.87) at 12 h with 7 descriptors. In a model 2, QSARs showed the goodness of fit of a model (R2 = 0.9998) with 8 descriptors (pKa, Cw, log Kow, M.W., P.S.A., M.V., #HBD, pKa⋅#H bond donors) at 0 h, while QSARs showed the coefficients of determination (R2 = 0.68) with 2 descriptors (pKa, M.V.) at 12 h. Particularly, we observed that some descriptors of EOCs such as pKa and # of HBD having polarity have more influenced on the n-TiO2 aggregation rate kinetics. Our developed QSARs demonstrated that the 7 descriptors of EOCs were significantly effective descriptors for predicting n-TiO2 aggregation rate kinetics in favorable conditions, which may implicate the complexity interactions between heterogeneous surfaces of n-TiO2 and physico-chemical properties of EOCs.
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Affiliation(s)
- Jaewoong Lee
- Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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17
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Wu SH, Zhang SC, Kang YH, Wang YF, Duan ZM, Jing MJ, Zhao WW, Chen HY, Xu JJ. Aggregation-Enabled Electrochemistry in Confined Nanopore Capable of Complementary Faradaic and Non-Faradaic Detection. Nano Lett 2024; 24:4241-4247. [PMID: 38546270 DOI: 10.1021/acs.nanolett.4c00563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Electrochemistry that empowers innovative nanoscopic analysis has long been pursued. Here, the concept of aggregation-enabled electrochemistry (AEE) in a confined nanopore is proposed and devised by reactive oxygen species (ROS)-responsive aggregation of CdS quantum dots (QDs) within a functional nanopipette. Complementary Faradaic and non-Faradaic operations of the CdS QDs aggregate could be conducted to simultaneously induce the signal-on of the photocurrents and the signal-off of the ionic signals. Such a rationale permits the cross-checking of the mutually corroborated signals and thus delivers more reliable results for single-cell ROS analysis. Combined with the rich biomatter-light interplay, the concept of AEE can be extended to other stimuli-responsive aggregations for electrochemical innovations.
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Affiliation(s)
- Si-Hao Wu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shuang-Chen Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yu-Han Kang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yi-Feng Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zu-Ming Duan
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Ming-Jian Jing
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Wei-Wei Zhao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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18
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Swargiary H, Radiul SM, Hazarika S. Excimer Fluorescence of Acriflavine Dye in Glycerol and Ethylene Glycol. J Fluoresc 2024:10.1007/s10895-024-03686-w. [PMID: 38587712 DOI: 10.1007/s10895-024-03686-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 03/22/2024] [Indexed: 04/09/2024]
Abstract
This research investigates the excimerisation of acriflavine dye in ethylene glycol and glycerol solvents. Acriflavine, a member of the acridine dye family, exhibits unique fluorescence properties with applications in various fields, including cellular nucleus observation, nucleic acid analysis, and dye laser active media etc. The study explores the impact of solvent and concentration on acriflavine's emission properties, with a focus on excimer formation, which can influence its suitability as a dye laser active medium. UV-Visible absorption spectroscopy reveals concentration-dependent absorption profiles, with distinctive monomer bands. Steady-state fluorescence studies demonstrate the emergence of red-shifted excimer fluorescence bands as concentrations increase in both solvents. Temperature-dependent fluorescence studies reveal the dynamics of excimer formation, suggesting dynamic diffusion as the excimerisation mechanism. Time-resolved fluorescence spectroscopy confirms the singlet character of both monomer and excimer states, providing insights into the excimerisation process. Critical concentration values are determined, representing the equilibrium between monomeric and excimeric forms. The study also explores pH-induced spectral shifts, highlighting the influence of acidity on fluorescence properties. Overall, this research deepens our understanding of acriflavine's excimerisation in ethylene glycol and glycerol, offering insights that can enhance its diverse applications, especially in laser technologies.
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Affiliation(s)
- Hiren Swargiary
- Department of Physics, Gauhati University, Guwahati, 781014, Assam, India
- Department of Physics, Eastern Karbi Anglong College, Sarihajan, Karbi Anglong, 782480, Assam, India
| | | | - Simanta Hazarika
- Department of Physics, Gauhati University, Guwahati, 781014, Assam, India.
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19
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Zhao W, Cheng Y, Pu J, Su L, Wang N, Cao Y, Liu L. Research Progress in Structure Synthesis, Properties, and Applications of Small-Molecule Silicone Surfactants. Top Curr Chem (Cham) 2024; 382:11. [PMID: 38589726 DOI: 10.1007/s41061-024-00457-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 03/12/2024] [Indexed: 04/10/2024]
Abstract
Silicone surfactants have garnered significant research attention owing to their superior properties, such as wettability, ductility, and permeability. Small-molecular silicone surfactants with simple molecular structures outperform polymeric silicone surfactants in terms of surface activity, emulsification, wetting, foaming, and other areas. Moreover, silicone surfactants with small molecules exhibit a diverse and rich molecular structure. This review discusses various synthetic routes for the synthesis of different classes of surfactants, including single-chain, "umbrella" structure, double chain, bolaform, Gemini, and stimulus-responsive surfactants. The fundamental surface/interface properties of the synthesized surfactants are also highlighted. Additionally, these surfactants have demonstrated enormous potential in agricultural synergism, drug delivery, mineral flotation, enhanced oil recovery, separation, and extraction, and foam fire-fighting.
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Affiliation(s)
- Wenhui Zhao
- School of Material Science and Engineering, Tiangong University, Tianjin, 300387, People's Republic of China
| | - Yuqiao Cheng
- School of Material Science and Engineering, Tiangong University, Tianjin, 300387, People's Republic of China.
| | - Jiaqi Pu
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, People's Republic of China
| | - Leigang Su
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, People's Republic of China
| | - Nan Wang
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, People's Republic of China
| | - Yinhao Cao
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, People's Republic of China
| | - Lijun Liu
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, People's Republic of China
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20
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Liang W, Zhang W, Shao X, Gong K, Su C, Zhang W, Peng C. Organic matters adsorbed on goethite inhibited the heterogeneous aggregation and adsorption of CdSe quantum dots: Experiments and extended DLVO theory. J Hazard Mater 2024; 467:133769. [PMID: 38359758 DOI: 10.1016/j.jhazmat.2024.133769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 02/04/2024] [Accepted: 02/08/2024] [Indexed: 02/17/2024]
Abstract
The widespread use of Cd-based quantum dots (Cd-QDs) has led to their inevitable release into the environment, and the prevalent iron oxides and natural organic matter (NOM) are the key factors affecting the environmental behavior and fate of Cd-QDs. However, the impact of NOM adsorbed on iron oxides on the behavior of Cd-QDs with iron oxides and the mechanism of its interaction are not clear. In this study, two kinds of water-soluble QDs (CdSe QDs and core-shell CdSe/ZnS QDs) were selected to study the aggregation and adsorption behavior on goethite (Goe) and goethite-humic acid/fulvic acid composites (Goe-HA/FA). Aggregation kinetics and adsorption experiments between QDs and Goe(-HA/FA), characterization, and extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory calculations indicated that electrostatic interaction was the dominant force for QDs adsorption on Goe(-HA/FA). HA/FA changed the surface charge of Goe and increased the electrostatic repulsion and steric hindrance between the particles, which in turn inhibited the adsorption of QDs on Goe. Besides, unsubstituted aromatic carbons, carboxy carbons, and carbonyl carbons played an important role in the adsorption process, and chemisorption occurred between QDs and Goe(-HA/FA). Our findings are important for better assessing the transport, fate, and potential environmental impacts and risks of Cd-QDs in iron-rich environments.
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Affiliation(s)
- Weiyu Liang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wen Zhang
- John A. Reif, Jr. Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, NJ, United States
| | - Xuechun Shao
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kailin Gong
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chengpeng Su
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wei Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Cheng Peng
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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21
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Yao D, Zhou L, Hu S, Zhao S, Zhang L. Improving the sensing sensitivity of silver nanoparticle-based colorimetric biosensors from the point of salt. Mikrochim Acta 2024; 191:244. [PMID: 38578321 DOI: 10.1007/s00604-024-06328-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 03/22/2024] [Indexed: 04/06/2024]
Abstract
The sensing sensitivity was improved for silver nanoparticles (AgNPs)-based colorimetric biosensors by using the most suitable salt to induce AgNPs aggregation. As for the salt composed of low-affinity anion and monovalent cation, the cation-dependent charge screening effect was the driving force for AgNPs aggregation. Apart from the charge screening effect, both the bridging of multivalent cation to the surface ligand of AgNP and the interaction between anion and Ag contributed to inducing AgNPs aggregation. Considering the higher aggregation efficiency of AgNPs resulted in a narrower sensing range, salt composed of low-affinity anion and monovalent cation was recommended for AgNPs-based colorimetric analysis, which was confirmed by fourfold higher sensitivity of DNA-21 detection using NaF than NaCl. This work inspires further thinking on improving the sensing performance of metal nanomaterials-based sensors from the point of colloidal surface science.
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Affiliation(s)
- Di Yao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China
| | - Liuyan Zhou
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China
| | - Shengqiang Hu
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China.
| | - Shulin Zhao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China
| | - Liangliang Zhang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China.
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Güngören MH, Romeijn S, Dijkstra JA, Crul M. Investigating the Impact of Drone Transport on the Stability of Monoclonal Antibodies for Inter-Hospital Transportation. J Pharm Sci 2024:S0022-3549(24)00130-8. [PMID: 38582280 DOI: 10.1016/j.xphs.2024.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/01/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
In the field of healthcare logistics, the reliance on conventional transport methods such as cars for the delivery of monoclonal antibodies (mAbs) is susceptible to challenges posed by traffic and infrastructure, leading to increased and unpredictable transport times. Recognizing the potential role of drones in mitigating these challenges, we aimed to investigate the impact of medical drone transport on the stability of mAbs. Compromised stability could lead to aggregation and immunogenicity, thereby jeopardizing the efficacy and safety of mAbs. We studied the transportation of vials as well as ready-to-administer infusion bags with blinatumomab, tocilizumab, and daratumumab. The methodology involved the measurement of both temperature and mechanical shock during drone transport. Moreover, the analytical techniques High Performance Size-Exclusion Chromatography (HP-SEC), Dynamic Light Scattering (DLS), Light Obscuration (LO), Micro-Flow Imaging (MFI), and Nanoparticle Tracking Analysis (NTA) were employed to comprehensively assess the presence of aggregates and particle formation. The key findings revealed no significant differences between car and drone transport, indicating that the stability of mAbs in both vials and infusion bags was adequately maintained during drone transport. This suggests that medical drones are a viable and reliable means for the inter-hospital transport of mAbs, paving the way for more efficient and predictable logistics in healthcare delivery.
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Affiliation(s)
- Muhammed H Güngören
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, the Netherlands; Department of Clinical Pharmacology and Pharmacy, Amsterdam University Medical Center, Location Vrije Universiteit, Amsterdam, the Netherlands
| | - Stefan Romeijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, the Netherlands
| | - Jacob A Dijkstra
- Department of Clinical Pharmacology and Pharmacy, Amsterdam University Medical Center, Location Vrije Universiteit, Amsterdam, the Netherlands
| | - Mirjam Crul
- Department of Clinical Pharmacology and Pharmacy, Amsterdam University Medical Center, Location Vrije Universiteit, Amsterdam, the Netherlands.
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23
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Basheer N, Buee L, Brion JP, Smolek T, Muhammadi MK, Hritz J, Hromadka T, Dewachter I, Wegmann S, Landrieu I, Novak P, Mudher A, Zilka N. Shaping the future of preclinical development of successful disease-modifying drugs against Alzheimer's disease: a systematic review of tau propagation models. Acta Neuropathol Commun 2024; 12:52. [PMID: 38576010 PMCID: PMC10993623 DOI: 10.1186/s40478-024-01748-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/21/2024] [Indexed: 04/06/2024] Open
Abstract
The transcellular propagation of the aberrantly modified protein tau along the functional brain network is a key hallmark of Alzheimer's disease and related tauopathies. Inoculation-based tau propagation models can recapitulate the stereotypical spread of tau and reproduce various types of tau inclusions linked to specific tauopathy, albeit with varying degrees of fidelity. With this systematic review, we underscore the significance of judicious selection and meticulous functional, biochemical, and biophysical characterization of various tau inocula. Furthermore, we highlight the necessity of choosing suitable animal models and inoculation sites, along with the critical need for validation of fibrillary pathology using confirmatory staining, to accurately recapitulate disease-specific inclusions. As a practical guide, we put forth a framework for establishing a benchmark of inoculation-based tau propagation models that holds promise for use in preclinical testing of disease-modifying drugs.
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Affiliation(s)
- Neha Basheer
- Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10, Bratislava, Slovakia
| | - Luc Buee
- Inserm, CHU Lille, CNRS, LilNCog - Lille Neuroscience & Cognition, University of Lille, 59000, Lille, France.
| | - Jean-Pierre Brion
- Faculty of Medicine, Laboratory of Histology, Alzheimer and Other Tauopathies Research Group (CP 620), ULB Neuroscience Institute (UNI), Université Libre de Bruxelles, 808, Route de Lennik, 1070, Brussels, Belgium
| | - Tomas Smolek
- Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10, Bratislava, Slovakia
| | - Muhammad Khalid Muhammadi
- Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10, Bratislava, Slovakia
| | - Jozef Hritz
- CEITEC Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 62500, Brno, Czech Republic
| | - Tomas Hromadka
- Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10, Bratislava, Slovakia
| | - Ilse Dewachter
- Biomedical Research Institute, BIOMED, Hasselt University, 3500, Hasselt, Belgium
| | - Susanne Wegmann
- German Center for Neurodegenerative Diseases, Charitéplatz 1, 10117, Berlin, Germany
- Einstein Center for Neurosciences Berlin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Isabelle Landrieu
- CNRS EMR9002 - BSI - Integrative Structural Biology, 59000, Lille, France
- Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, University of Lille, 59000, Lille, France
| | - Petr Novak
- Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10, Bratislava, Slovakia
| | - Amritpal Mudher
- School of Biological Sciences, Faculty of Environment and Life Sciences, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, UK
| | - Norbert Zilka
- Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10, Bratislava, Slovakia.
- AXON Neuroscience R&D Services SE, Dubravska Cesta 9, 845 10, Bratislava, Slovakia.
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24
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Dufourc EJ. Wine tannins and their aggregation/release with lipids and proteins: Review and perspectives for neurodegenerative diseases. Biophys Chem 2024; 307:107178. [PMID: 38277878 DOI: 10.1016/j.bpc.2024.107178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/10/2024] [Accepted: 01/10/2024] [Indexed: 01/28/2024]
Abstract
Tannins are amphiphilic molecules, often polymeric, which can be generally described as a core containing hydrophobic aromatic rings surrounded by hydroxyl groups. They have been known for millennia and are part of human culture. They are ubiquitous in nature and are best known in the context of wine and tea tasting and food cultures. However, they are also very useful for human health, as they are powerful antioxidants capable of combating the constant aggressions of everyday life. However, their mode of action is only just beginning to be understood. This review, using physicochemical concepts, attempts to summarize current knowledge and present an integrated view of the complex relationship between tannins, proteins and lipids, in the context of wine drinking while eating. There are many thermodynamic equilibria governing the interactions between tannins, saliva proteins, lipid droplets in food, membranes and the taste receptors embedded in them. Taste sensations can be explained using these multiple equilibria: for example, astringency (dry mouth) can be explained by the strong binding of tannin micelles to the proline-rich proteins of saliva, suppressing their lubricating action on the palate. In the presence of lipid droplets in food, the equilibrium is shifted towards tannin-lipid complexes, a situation that reduces the astringency perceived when consuming a tannic wine with fatty foods, the so-called "camembert effect". Tannins bind preferentially to taste receptors located in mouth membranes, but can also fluidify lipids in the non-keratinized mucous membranes of the mouth, which can impair the functioning of taste receptors there. Cholesterol, present in large quantities in keratinized mucous membranes, stiffens them and thus prevents tannins from disrupting the conduction of information through other taste receptors. As tannins assemble and disassemble depending on whether they are in contact with proteins, lipids or taste receptors, a perspective on their potential use in the context of neurodegenerative diseases where fibrillation is a key phenomenon will also be discussed.
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Affiliation(s)
- Erick J Dufourc
- Institut Européen de Chimie et Biologie UAR3033 CNRS, University of Bordeaux, INSERM US01, Pessac, France; Institute of Chemistry & Biology of Membranes & Nanoobjects, UMR5248, CNRS, University of Bordeaux, Bordeaux Polytechnic Institute, Pessac, France.
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25
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Zhang Z, Zhang H, Wu G, Xu X, Cao R, Wan Q, Xu H, Wang J, Huang T, Wen G. The aggregation characteristics of Aspergillus spores under various conditions and the impact on LPUV inactivation: Comparisons with chlorine-based disinfection. Water Res 2024; 253:121323. [PMID: 38377927 DOI: 10.1016/j.watres.2024.121323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 01/30/2024] [Accepted: 02/14/2024] [Indexed: 02/22/2024]
Abstract
Aggregation is the primary step prior to fungal biofilm development. Understanding the attributes of aggregation is of great significance to better control the emergence of waterborne fungi. In this study, the aggregation of Aspergills spores (A. flavus and A. fumigatus) under various salt, culture medium, and humic acid (HA) conditions was investigated for the first time, and the inactivation via low-pressure ultraviolet (LPUV) upon aggregated Aspergillus spores was also presented. The aggregation efficiency and size of aggregates increased over time and at low salt (NaCl and CaCl2) concentration (10 mM) while decreasing with the continuous increase of salt concentration (100 and 200 mM). Increasing the concentration of culture medium and HA promoted the aggregation of fungal spores. Spores became hydrated, swelled, and secreted more viscous substances during the growth period, which accelerated the aggregation process. Results also suggested that fungal spores aggregated more easily in actual water, posing a high risk of biohazard in real-life scenarios. Inactivation efficiency by LPUV decreased with higher aggregation degrees due to the protection from the damaged spores on the outer layer and the shielding of pigments in the cell wall. Compared to chlorine-based disinfection, the aggregation resulted in the extension of shoulder length yet neglectable change of inactivation rate constant under LPUV treatment. Further investigation of cell membrane integrity and intracellular reactive oxygen species was conducted to elucidate the difference in mechanisms between various techniques. This study provides insight into the understanding and controlling of the aggregation of fungal spores.
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Affiliation(s)
- Zhenghong Zhang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Huan Zhang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Gehui Wu
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Xiangqian Xu
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Ruihua Cao
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Qiqi Wan
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Huining Xu
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Jingyi Wang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Tinglin Huang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Gang Wen
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China.
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26
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Salmani F, Mohammadi M, Seif R, Khatami SH, Noori S, Tehrani HS, Riazi G, Balalaie S, Moosavi-Movahedi AA, Fard AM, Mahnam K, Keramatinia A, Tafakhori A, Aghamollaii V, Toutounchi AH, Shahmohammadi MR, Karima S. Lysine ε-aminolysis and incorporation of sulfhydryl groups into human brain tau 4R/1N and 306VQIVYK 311 enhances the formation of beta structures and toxicity. Int J Biol Macromol 2024; 263:130223. [PMID: 38365146 DOI: 10.1016/j.ijbiomac.2024.130223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 02/13/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
In the present study, we investigated the effects of N-homocysteine thiolactone (tHcy) modification on expressed and purified tau protein and the synthesized VQIVYK target peptide. The modified constructs were subjected to comprehensive validation using various methodologies, including mass spectrometry. Subsequently, in vivo, in vitro, and in silico characterizations were performed under both reducing and non-reducing conditions, as well as in the presence and absence of heparin as a cofactor. Our results unequivocally confirmed that under reducing conditions and in the presence of heparin, the modified constructs exhibited a greater propensity for aggregation. This enhanced aggregative behavior can be attributed to the disruption of lysine positive charges and the subsequent influence of hydrophobic and p-stacking intermolecular forces. Notably, the modified oligomeric species induced apoptosis in the SH-SY5Y cell line, and this effect was further exacerbated with longer incubation times and higher concentrations of the modifier. These observations suggest a potential mechanism involving reactive oxygen species (ROS). To gain a deeper understanding of the molecular mechanisms underlying the neurotoxic effects, further investigations are warranted. Elucidating these mechanisms will contribute to the development of more effective strategies to counteract aggregation and mitigate neurodegeneration.
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Affiliation(s)
- Farzaneh Salmani
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences (SBMU), Tehran, Iran
| | - Marjan Mohammadi
- Student Research Committee, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Roozbeh Seif
- Student Research Committee, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyyed Hossein Khatami
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences (SBMU), Tehran, Iran
| | - Shokoofeh Noori
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences (SBMU), Tehran, Iran
| | | | - Gholamhossein Riazi
- Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | - Saeed Balalaie
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, Tehran, Iran
| | | | | | - Karim Mahnam
- Faculty of Science, Department of Biology, Nanotechnology Research Center, Sharekord University, Sharekord, Iran
| | - Aliasghar Keramatinia
- Department of Community Medicine,Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Tafakhori
- Department of Neurology, School of Medicine, Iranian Center of Neurological Research, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Vajiheh Aghamollaii
- Neurology Department, Roozbeh Hospital, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Alireza Haghbin Toutounchi
- Department of general surgery, Imam Hosein medical and educational center, Shahid Beheshti University of Medical Sciences,Tehran,Iran
| | - Mohammad Reza Shahmohammadi
- Functional Neurosurgery Research Center, Shohada Tajrish Comprehensive Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences (SBMU), Tehran, Iran
| | - Saeed Karima
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences (SBMU), Tehran, Iran.
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27
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Dash DR, Singh SK, Singha P. Viscoelastic behavior, gelation properties and structural characterization of Deccan hemp seed (Hibiscus cannabinus) protein: Influence of protein and ionic concentrations, pH, and temperature. Int J Biol Macromol 2024; 263:130120. [PMID: 38350581 DOI: 10.1016/j.ijbiomac.2024.130120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 02/15/2024]
Abstract
This study investigates the viscoelastic behavior, gelling properties, and structural characteristics of Deccan hemp seed protein (DHSP) to overcome limitations in its application in food formulations. Small amplitude oscillatory shear measurements were employed to investigate the impact of protein concentration, pH, ionic concentration, and temperature on DHSP's rheological features. The study revealed that the 20 % protein dispersion had the highest storage modulus (G') and yield stress at 63.96 ± 0.23 Pa and 0.61 Pa, respectively. DHSP dispersion exhibited pseudo-plastic behavior across various conditions. The gelling performance was higher at pH 4 and 8 and at ionic concentration in the range of 0.1 M - 0.5 M. Gelation time and temperature were observed from the temperature ramp test. Structural characterizations, including fluorescence spectroscopy, circular dichroism spectra, FTIR spectra, SEM, AFM images, zeta potential analysis, and DSC, provided insights into DHSP's tertiary and secondary conformation, surface characteristics, and thermal properties. Notably, the study highlighted DHSP's exceptional rheological properties, making it a promising gelling material for the food and nutraceutical industries. The findings also offer new insights into DHSP's structural characteristics, suggesting potential applications in food packaging and product development within the food industry.
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Affiliation(s)
- Dibya Ranjan Dash
- Department of Food Process Engineering, National Institute of Technology, Rourkela, Odisha-769008, India.
| | - Sushil Kumar Singh
- Department of Food Process Engineering, National Institute of Technology, Rourkela, Odisha-769008, India.
| | - Poonam Singha
- Department of Food Process Engineering, National Institute of Technology, Rourkela, Odisha-769008, India.
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28
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Bashir S, Aiman A, Shahid M, Chaudhary AA, Sami N, Basir SF, Hassan I, Islam A. Amyloid-induced neurodegeneration: A comprehensive review through aggregomics perception of proteins in health and pathology. Ageing Res Rev 2024; 96:102276. [PMID: 38499161 DOI: 10.1016/j.arr.2024.102276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 03/12/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024]
Abstract
Amyloidosis of protein caused by fibrillation and aggregation are some of the most exciting new edges not only in protein sciences but also in molecular medicines. The present review discusses recent advancements in the field of neurodegenerative diseases and therapeutic applications with ongoing clinical trials, featuring new areas of protein misfolding resulting in aggregation. The endogenous accretion of protein fibrils having fibrillar morphology symbolizes the beginning of neuro-disorders. Prognostic amyloidosis is prominent in numerous degenerative infections such as Alzheimer's and Parkinson's disease, Amyotrophic lateral sclerosis (ALS), etc. However, the molecular basis determining the intracellular or extracellular evidence of aggregates, playing a significant role as a causative factor in neurodegeneration is still unclear. Structural conversions and protein self-assembly resulting in the formation of amyloid oligomers and fibrils are important events in the pathophysiology of the disease. This comprehensive review sheds light on the evolving landscape of potential treatment modalities, highlighting the ongoing clinical trials and the potential socio-economic impact of novel therapeutic interventions in the realm of neurodegenerative diseases. Furthermore, many drugs are undergoing different levels of clinical trials that would certainly help in treating these disorders and will surely improve the socio-impact of human life.
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Affiliation(s)
- Sania Bashir
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
| | - Ayesha Aiman
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India; Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
| | - Mohammad Shahid
- Department of Basic Medical Sciences, College of Medicine, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.
| | - Anis Ahmad Chaudhary
- Department of Biology, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia.
| | - Neha Sami
- Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
| | - Seemi Farhat Basir
- Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
| | - Imtaiyaz Hassan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
| | - Asimul Islam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
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29
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Zeller-Hahn J, Kobsar A, Bittl M, Koessler A, Weber K, Boeck M, Koessler J. Increased Responsiveness of Stored Platelets after Short-Term Refrigeration. Transfus Med Hemother 2024; 51:84-93. [PMID: 38584692 PMCID: PMC10996060 DOI: 10.1159/000533274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/25/2023] [Indexed: 04/09/2024] Open
Abstract
Introduction Refrigeration of platelets is considered to provide advantages in therapy of acute hemorrhage due to increased platelet responsiveness. The alleviation of inhibitory signaling caused by cold temperature (CT) has been identified as an important mechanism contributing to enhanced platelet reactivity, detectable in freshly prepared platelets within 1 h of cold storage. The aim of this study was to confirm the effects of short-term refrigeration in platelets from apheresis-derived platelet concentrates (APC). Methods APC were stored under standardized conditions for 1 day or for 2 days at room temperature and then refrigerated for 1 h, followed by sampling of platelets for analysis. Platelet reactivity was measured by aggregation studies using threshold concentrations of different agonists and by detection of fibrinogen binding using flow cytometry. The exploration of inhibitory signaling comprised the detection of VASP phosphorylation using flow cytometry or Western blot and the measurement of cyclic nucleotide levels. Results Aggregation responses induced with ADP, collagen, or thrombin receptor-activating peptide-6 (TRAP-6) were increased in APC after cold storage for 1 h, associated with elevated TRAP-6-induced fibrinogen binding. VASP phosphorylation levels were decreased after cold exposition, detectable in 1-day- and 2-day-stored APC with flow cytometry, and in 2-day-stored APC with Western blot technique. Induced cGMP levels were lower after storage at CT in APC on day 1 and on day 2, whereas cAMP levels were reduced on 2-day-stored APC. Conclusion Short-term refrigeration for 1 h is sufficient to induce an attenuation of inhibitory signaling, accompanied with increased aggregation responses in APC stored for up to 2 days. The "on demand" refrigeration of PC may be a reasonable approach for the preparation of platelets with enhanced responsiveness to treat patients with hemorrhage more effectively, which should be further addressed in consecutive studies.
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Affiliation(s)
- Julia Zeller-Hahn
- Institute of Clinical Transfusion Medicine and Haemotherapy, University of Würzburg, Würzburg, Germany
| | - Anna Kobsar
- Institute of Clinical Transfusion Medicine and Haemotherapy, University of Würzburg, Würzburg, Germany
| | - Marius Bittl
- Institute of Clinical Transfusion Medicine and Haemotherapy, University of Würzburg, Würzburg, Germany
| | - Angela Koessler
- Institute of Clinical Transfusion Medicine and Haemotherapy, University of Würzburg, Würzburg, Germany
| | - Katja Weber
- Institute of Clinical Transfusion Medicine and Haemotherapy, University of Würzburg, Würzburg, Germany
| | - Markus Boeck
- Institute of Clinical Transfusion Medicine and Haemotherapy, University of Würzburg, Würzburg, Germany
| | - Juergen Koessler
- Institute of Clinical Transfusion Medicine and Haemotherapy, University of Würzburg, Würzburg, Germany
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30
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Shi W, Guan L, Ren X, Zhang J, Luo T, Liu C, Lan Y, Chen Z, Chen X, Li X. Effect of aggregation configuration of molecular fluorophore CZA on photoluminescence properties of carbon dots. J Colloid Interface Sci 2024; 659:213-224. [PMID: 38176231 DOI: 10.1016/j.jcis.2023.12.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/03/2023] [Accepted: 12/09/2023] [Indexed: 01/06/2024]
Abstract
The effect of aggregation configuration of molecular fluorophore citrazinic acid (CZA) on the photoluminescence (PL) properties of carbon dots (CDs) has been investigated using first-principles method. The structural stability of all aggregates has been analyzed, and the results show that the most stable structures are J-type CZA aggregates with head-to-tail configurations and the CZA/CD aggregates are bonded by replacing H atoms on the CD edges with de-OH from the pyridine ring of CZA. The luminescent properties of CZA/CD aggregates are mainly affected by the binding modes and binding sites. When the sites belong to electron-donating groups, electron-withdrawing groups or sp2 domain, the PL spectra of CDs are shifted and the luminescent intensities are significantly enhanced. The results suggest that covalently bonded CZA/CD aggregates are responsible for the high fluorescence quantum yield of CD. Moreover, the distance between the centers of the two pyridine rings in H-type CZA dimers less than 3.5 Å is prone to π-π stacking, leading to fluorescence quenching of aggregates. The present work is helpful in understanding the effect of molecular fluorophores on the PL properties of CDs and provides theoretical guidance for the controllable synthesis of CDs.
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Affiliation(s)
- Weicai Shi
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China
| | - Li Guan
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China.
| | - Xiaojie Ren
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China
| | - Jianen Zhang
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China
| | - Tao Luo
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China
| | - Chunzhi Liu
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China
| | - Youshi Lan
- Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, PR China
| | - Zhijuan Chen
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China
| | - Xiaobo Chen
- Division of Energy, Matter, and Systems, School of Science and Engineering, University of Missouri - Kansas City, KS, MO 64110, United States.
| | - Xu Li
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, PR China.
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Cui Z, Qu L, Zhang Q, Lu F, Liu F. Brazilin-7-2-butenoate inhibits amyloid β-protein aggregation, alleviates cytotoxicity, and protects Caenorhabditis elegans. Int J Biol Macromol 2024; 264:130695. [PMID: 38458278 DOI: 10.1016/j.ijbiomac.2024.130695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/05/2024] [Accepted: 03/05/2024] [Indexed: 03/10/2024]
Abstract
The fibrillogenesis of amyloid β-protein (Aβ) gradually accumulates to form neurotoxic Aβ aggregates in the human brain, which is the direct cause of Alzheimer's disease (AD) related symptoms. There are currently no effective therapies for AD. Brazilin, a natural polyphenol, inhibits Aβ fibrillogenesis, disrupts the mature fibrils and alleviates the corresponding cytotoxicity, but it also has the high toxic. Therefore, brazilin-7-2-butenoate (B-7-2-B), a brazilin derivative, was designed and synthesized. B-7-2-B exhibited lower toxicity and stronger inhibitory effect on Aβ aggregation than brazilin. B-7-2-B could prevent the formation of Aβ fibrils and oligomers, and depolymerize pre-formed aggregates in a dose-dependent manner. Furthermore, B-7-2-B prominently alleviated the cytotoxicity and the oxidative stress induced by Aβ aggregates in PC12 cells. The protective impacts of B-7-2-B were further demonstrated by using the Caenorhabditis elegans model, including decreasing the extent of Aβ aggregation, improving the motility and sensation disorders. Eventually, B-7-2-B was proven to be no apparent damage to worms. In summarize, it can be concluded that B-7-2-B has the potential as a drug for treating AD.
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Affiliation(s)
- Zhan Cui
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, PR China
| | - Lili Qu
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, PR China
| | - Qingfu Zhang
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, PR China
| | - Fuping Lu
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, PR China
| | - Fufeng Liu
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, PR China.
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32
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Xu Z, Zhang J, Tang J, Gong Y, Zou Y, Zhang Q. Dissecting the effect of ALS mutation S375G on the conformational properties and aggregation dynamics of TDP-43 370-375 fragment. Biophys Chem 2024; 310:107230. [PMID: 38615537 DOI: 10.1016/j.bpc.2024.107230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/19/2024] [Accepted: 03/28/2024] [Indexed: 04/16/2024]
Abstract
The aggregation of transactive response deoxyribonucleic acid (DNA) binding protein of 43 kDa (TDP-43) into ubiquitin-positive inclusions is closely associated with amyotrophic lateral sclerosis (ALS), frontotemporal lobar degeneration, and chronic traumatic encephalopathy. The 370-375 fragment of TDP-43 (370GNNSYS375, TDP-43370-375), the amyloidogenic hexapeptides, can be prone to forming pathogenic amyloid fibrils with the characteristic of steric zippers. Previous experiments reported the ALS-associated mutation, serine 375 substituted by glycine (S375G) is linked to early onset disease and protein aggregation of TDP-43. Based on this, it is necessary to explore the underlying molecular mechanisms. By utilizing all-atom molecular dynamics (MD) simulations of 102 μs in total, we investigated the impact of S375G mutation on the conformational ensembles and oligomerization dynamics of TDP-43370-375 peptides. Our replica exchange MD simulations show that S375G mutation could promote the unstructured conformation formation and induce peptides to form a loose packed oligomer, thus inhibiting the aggregation of TDP-43370-375. Further analyses suggest that S375G mutation displays a reduction effect on the number of total hydrogen bonds and contacts among TDP-43370-375 peptides. Hydrogen bonding and polar interactions among TDP-43370-375 peptides, as well as Y374-Y374 π-π stacking interaction, are attenuated by S375G mutation. Additional microsecond MD simulations demonstrate that S375G mutation could prohibit the conformational conversion to β-structure-rich aggregates and possess an inhibitory effect on the oligomerization dynamics of TDP-43370-375. This study offers for the first time of molecular insights into the S375G mutation affecting the aggregation of TDP-43370-375 at the atomic level, and may open new avenues in the development of future site-specific mutation therapeutics.
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Affiliation(s)
- Zhengdong Xu
- Department of Physical Education, Shanghai University of Engineering Science, 333 Long Teng Road, Shanghai 201620, People's Republic of China
| | - Jianxin Zhang
- Department of Physical Education, Shanghai University of Engineering Science, 333 Long Teng Road, Shanghai 201620, People's Republic of China
| | - Jiaxing Tang
- College of Physical Education, Shanghai University of Sport, 399 Chang Hai Road, Shanghai 200438, People's Republic of China
| | - Yehong Gong
- General Education Center, Westlake University, 600 Dunyu Road, Hangzhou 310030, People's Republic of China
| | - Yu Zou
- Department Sport and Exercise Science, College of Education, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310007, Zhejiang, People's Republic of China.
| | - Qingwen Zhang
- College of Physical Education, Shanghai University of Sport, 399 Chang Hai Road, Shanghai 200438, People's Republic of China.
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Sherratt K, Srivastava A, Ainslie K, Singh DE, Cublier A, Marinescu MC, Carretero J, Garcia AC, Franco N, Willem L, Abrams S, Faes C, Beutels P, Hens N, Müller S, Charlton B, Ewert R, Paltra S, Rakow C, Rehmann J, Conrad T, Schütte C, Nagel K, Abbott S, Grah R, Niehus R, Prasse B, Sandmann F, Funk S. Characterising information gains and losses when collecting multiple epidemic model outputs. Epidemics 2024; 47:100765. [PMID: 38643546 DOI: 10.1016/j.epidem.2024.100765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 01/25/2024] [Accepted: 03/26/2024] [Indexed: 04/23/2024] Open
Abstract
BACKGROUND Collaborative comparisons and combinations of epidemic models are used as policy-relevant evidence during epidemic outbreaks. In the process of collecting multiple model projections, such collaborations may gain or lose relevant information. Typically, modellers contribute a probabilistic summary at each time-step. We compared this to directly collecting simulated trajectories. We aimed to explore information on key epidemic quantities; ensemble uncertainty; and performance against data, investigating potential to continuously gain information from a single cross-sectional collection of model results. METHODS We compared projections from the European COVID-19 Scenario Modelling Hub. Five teams modelled incidence in Belgium, the Netherlands, and Spain. We compared July 2022 projections by incidence, peaks, and cumulative totals. We created a probabilistic ensemble drawn from all trajectories, and compared to ensembles from a median across each model's quantiles, or a linear opinion pool. We measured the predictive accuracy of individual trajectories against observations, using this in a weighted ensemble. We repeated this sequentially against increasing weeks of observed data. We evaluated these ensembles to reflect performance with varying observed data. RESULTS By collecting modelled trajectories, we showed policy-relevant epidemic characteristics. Trajectories contained a right-skewed distribution well represented by an ensemble of trajectories or a linear opinion pool, but not models' quantile intervals. Ensembles weighted by performance typically retained the range of plausible incidence over time, and in some cases narrowed this by excluding some epidemic shapes. CONCLUSIONS We observed several information gains from collecting modelled trajectories rather than quantile distributions, including potential for continuously updated information from a single model collection. The value of information gains and losses may vary with each collaborative effort's aims, depending on the needs of projection users. Understanding the differing information potential of methods to collect model projections can support the accuracy, sustainability, and communication of collaborative infectious disease modelling efforts.
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Affiliation(s)
| | | | - Kylie Ainslie
- Dutch National Institute of Public Health and the Environment (RIVM), Bilthoven, Netherlands; School of Public Health, University of Hong Kong, Hong Kong Special Administrative Region
| | | | | | | | | | | | | | | | - Steven Abrams
- University of Antwerp, Antwerp, Belgium; UHasselt, Hasselt, Belgium
| | | | | | - Niel Hens
- University of Antwerp, Antwerp, Belgium; UHasselt, Hasselt, Belgium
| | | | | | | | | | | | | | - Tim Conrad
- Zuse Institute Berlin (ZIB), Berlin, Germany
| | | | - Kai Nagel
- Technische Universität Berlin, Berlin, Germany
| | - Sam Abbott
- London School of Hygiene & Tropical Medicine, London, UK
| | | | | | | | | | - Sebastian Funk
- London School of Hygiene & Tropical Medicine, London, UK
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Wu T, Chen Y, Yang Z. 3D pore-scale characterization of colloid aggregation and retention by confocal microscopy: Effects of fluid structure and ionic strength. Sci Total Environ 2024; 917:170349. [PMID: 38280576 DOI: 10.1016/j.scitotenv.2024.170349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/03/2024] [Accepted: 01/19/2024] [Indexed: 01/29/2024]
Abstract
Understanding the mechanisms of colloid transport and retention as well as the spatial distribution of colloids in porous media is an important topic for contamination transport and remediation in subsurface environments. Utilizing advanced three-dimensional visualization experiments, we effectively capture the intricate distribution characteristics of colloids in the 3D pore space and quantify the size of colloid clusters that aggregate at fluid-fluid interfaces and solid surfaces during two-phase flow. Our experimental results reveal the influence of pore-scale events, such as Haines jumps and pinch-off, on colloid retention. Our results also indicate that large drainage rates can facilitate colloid retention on solid surfaces, especially under the condition of high ionic strength. This can be attributed to the migration of colloids from the fluid-fluid interface to the solid surface, propelled by transients in the local fluid structure. The findings reveal a synergistic effect of the ionic strength and hydrodynamic conditions on colloid transport and retention during two-phase flow and provide important insights for predicting the fate and transport of contaminants in soil and groundwater environments involving multiple fluid phases.
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Affiliation(s)
- Ting Wu
- State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan 430072, China; Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of the Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Yurun Chen
- Wuhan Britain-China School, Wuhan 430033, China
| | - Zhibing Yang
- State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan 430072, China; Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of the Ministry of Education, Wuhan University, Wuhan 430072, China.
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35
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Shen H, Xu J, Fu Z, Wei X, Kang X, Shi W, Zhu M. Photoluminescence Quenching of Hydrophobic Ag 29 Nanoclusters Caused by Molecular Decoupling during Aqueous Phase Transfer and EmissionRecovery through Supramolecular Recoupling. Angew Chem Int Ed Engl 2024; 63:e202317995. [PMID: 38191987 DOI: 10.1002/anie.202317995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/10/2024]
Abstract
Exploiting emissive hydrophobic nanoclusters for hydrophilic applications remains a challenge because of photoluminescence (PL) quenching during phase transfer. In addition, the mechanism underlying PL quenching remains unclear. In this study, the PL-quenching mechanism was examined by analyzing the atomically precise structures and optical properties of a surface-engineered Ag29 nanocluster with an all-around-carboxyl-functionalized surface. Specifically, phase-transfer-triggered PL quenching was justified as molecular decoupling, which directed an unfixed cluster surface and weakened the radiative transition. Furthermore, emission recovery of the quenched nanoclusters was accomplished by using a supramolecular recoupling approach through the glutathione-addition-induced aggregation of cluster molecules, wherein the restriction of intracluster motion and intercluster rotation strengthened the radiative transition of the clusters. The results of this work offer a new perspective on structure-emission correlations for atomically precise nanoclusters and hopefully provide insight into the fabrication of highly emissive cluster-based nanomaterials for downstream hydrophilic applications.
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Affiliation(s)
- Honglei Shen
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Anhui University, Hefei, Anhui, 230601, P. R. China
| | - Jiawei Xu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Anhui University, Hefei, Anhui, 230601, P. R. China
| | - Ziwei Fu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Anhui University, Hefei, Anhui, 230601, P. R. China
| | - Xiao Wei
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Anhui University, Hefei, Anhui, 230601, P. R. China
| | - Xi Kang
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Anhui University, Hefei, Anhui, 230601, P. R. China
| | - Wenxiong Shi
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, P. R. China
| | - Manzhou Zhu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Anhui University, Hefei, Anhui, 230601, P. R. China
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36
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Kleinheider J, Schrimpf T, Scheel R, Mairath T, Hermann A, Knepper K, Strohmann C. Tuning Reactivities of tert-Butyllithium by the Addition of Stoichiometric Amounts of Tetrahydrofuran. Chemistry 2024; 30:e202304226. [PMID: 38189898 DOI: 10.1002/chem.202304226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/05/2024] [Accepted: 01/05/2024] [Indexed: 01/09/2024]
Abstract
In alkyllithium chemistry the highest reactivity has historically been linked to the smallest degree of aggregation possible. Since tert-butyllithium is known to form a monomer in tetrahydrofuran solution, using just stoichiometric amounts of the lewis base to selectively form a dimeric species seemed irrational. In this study, we showed a considerable increase of the reactivity of t-BuLi when using stoichiometric amounts of THF in the non-polar solvent n-pentane in order to enable the deprotonation of simple methyl silanes and other low C-H-acidic substrates. In this context, we were able to obtain the corresponding aggregates of t-BuLi with the ligand THF in suspension and as crystalline solids and investigate them by single crystal X-ray structural analysis, in situ FTIR spectroscopy and quantum chemical calculations. Furthermore, we were able to explain the enhanced reactivity of t-BuLi with stoichiometric amounts of THF on the basis of structural features of the bridged dimer obtained under these conditions. With these findings, we present a new target in the aggregation of alkyllithium reagents: the selectively formed "frustrated" aggregates!
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Affiliation(s)
- Johannes Kleinheider
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
| | - Tobias Schrimpf
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
| | - Rebecca Scheel
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
| | - Tristan Mairath
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
| | - Andreas Hermann
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
| | - Kathrin Knepper
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
| | - Carsten Strohmann
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Str. 6, 44227, Dortmund, Germany
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37
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Jaeger-Honz S, Klein K, Schreiber F. Systematic analysis, aggregation and visualisation of interaction fingerprints for molecular dynamics simulation data. J Cheminform 2024; 16:28. [PMID: 38475907 DOI: 10.1186/s13321-024-00822-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 03/02/2024] [Indexed: 03/14/2024] Open
Abstract
Computational methods such as molecular docking or molecular dynamics (MD) simulations have been developed to simulate and explore the interactions between biomolecules. However, the interactions obtained using these methods are difficult to analyse and evaluate. Interaction fingerprints (IFPs) have been proposed to derive interactions from static 3D coordinates and transform them into 1D bit vectors. More recently, the concept has been applied to derive IFPs from MD simulations, which adds a layer of complexity by adding the temporal motion and dynamics of a system. As a result, many IFPs are obtained from one MD simulation, resulting in a large number of individual IFPs that are difficult to analyse compared to IFPs derived from static 3D structures. Scientific contribution: We introduce a new method to systematically aggregate IFPs derived from MD simulation data. In addition, we propose visualisations to effectively analyse and compare IFPs derived from MD simulation data to account for the temporal evolution of interactions and to compare IFPs across different MD simulations. This has been implemented as a freely available Python library and can therefore be easily adopted by other researchers and to different MD simulation datasets.
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Affiliation(s)
- Sabrina Jaeger-Honz
- Department of Computer and Information Science, University of Konstanz, Universitätsstrasse 10, 78464, Constance, Germany.
| | - Karsten Klein
- Department of Computer and Information Science, University of Konstanz, Universitätsstrasse 10, 78464, Constance, Germany
| | - Falk Schreiber
- Department of Computer and Information Science, University of Konstanz, Universitätsstrasse 10, 78464, Constance, Germany
- Faculty of Information Technology, Monash University, Clayton, VIC, 3800, Australia
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38
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Zhang Z, Miller LM, He H, Nadagouda MN, Borch T, O'Shea KE, Dionysiou DD. Molecular insights into the bonding mechanisms between selenium and dissolved organic matter. Sci Total Environ 2024; 915:169429. [PMID: 38123086 DOI: 10.1016/j.scitotenv.2023.169429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
Natural organic matter (NOM) plays a critical role in the mobilization and bioavailability of metals and metalloids in the aquatic environment. Selenium (Se), an environmental contaminant of aquatic systems, has drawn increasing attention over the years. While Se is a vital micronutrient to human beings, animals and plants, excess Se intake may pose serious long-term risks. However, the interaction between Se and dissolved organic matter (DOM) remains relatively unexplored, especially the reaction mechanisms and interactions of specific NOM components of certain molecular weight and the corresponding functional group change. Herein, we report an investigation on the interactions between Se and DOM by focusing on the mass distribution profile change of operationally defined molecular weight fractions of humic acid (HA) and fulvic acid (FA). The results showed that across all molecular weights studied, HA fractions were more prone to enhanced aggregation upon introduction of Se into the system. For FA, the presence of Se species results in aggregation, dissociation, and redox reactions with the first two being the major mechanisms. Total organic carbon analysis (TOC), UV-vis spectroscopy (UV-vis), and Orbitrap MS data showed that [10, 30] kDa MW fraction had the largest aromatic decrease (CRAM-like, lignin-like and tannin-like) upon addition of SeO2 via dissociation as the dominant mechanism. Fourier transform infrared spectroscopy (FT-IR) revealed that Se based bridging or chelation of functional groups from individual DOM components through hydrogen bonding in the form of SeO⋯H and possibly Se⋯H and/or attractive electrostatic interactions lead to aggregated DOM1⋯Se⋯DOM2. It was concluded from two-dimensional correlation analyses of excitation emission matrix (EEM) and FT-IR that the preferred Se-binding follows lipid ➔ peptide ➔ tannin ➔ aromatic functionalities. These results provide new understanding of Se interactions with various NOM components in aquatic environments and provide insight for Se assessing health risk and/or treatment of Se contaminated water.
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Affiliation(s)
- Zhe Zhang
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DCEE), University of Cincinnati, OH 45221, USA
| | - Lance M Miller
- Department of Chemical Engineering, Purdue University, IN 47907, USA
| | - Huan He
- Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Mallikarjuna N Nadagouda
- The U.S. Environmental Protection Agency, ORD, CESER, WID, CMTB, 26 W. Martin Luther King Jr. Drive, Cincinnati, OH 45268, USA
| | - Thomas Borch
- Department of Soil and Crop Sciences and Department of Chemistry, Colorado State University, 1170 Campus Delivery, Fort Collins, CO 80523, USA
| | - Kevin E O'Shea
- Department of Chemistry and Biochemistry, Florida International University, University Park, Miami, FL 33199, USA.
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DCEE), University of Cincinnati, OH 45221, USA.
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39
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Gou X, Fu Y, Li J, Xiang J, Yang M, Zhang Y. Impact of nanoplastics on Alzheimer 's disease: Enhanced amyloid-β peptide aggregation and augmented neurotoxicity. J Hazard Mater 2024; 465:133518. [PMID: 38228001 DOI: 10.1016/j.jhazmat.2024.133518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/18/2024]
Abstract
Nanoplastics, widely existing in the environment and organisms, have been proven to cross the blood-brain barrier, increasing the incidence of neurodegenerative diseases like Alzheimer's disease (AD). However, current studies mainly focus on the neurotoxicity of nanoplastics themselves, neglecting their synergistic effects with other biomolecules and the resulting neurotoxicity. Amyloid β peptide (Aβ), which triggers neurotoxicity through its self-aggregation, is the paramount pathogenic protein in AD. Here, employing polystyrene nanoparticles (PS) as a model for nanoplastics, we reveal that 100 pM PS nanoparticles significantly accelerate the nucleation rate of two Aβ subtypes (Aβ40 and Aβ42) at low concentrations, promoting the formation of more Aβ oligomers and leading to evident neurotoxicity. The hydrophobic surface of PS facilitates the interaction of hydrophobic fragments between Aβ monomers, responsible for the augmented neurotoxicity. This work provides consequential insights into the modulatory impact of low-dose PS on Aβ aggregation and the ensuing neurotoxicity, presenting a valuable foundation for future research on the intricate interplay between environmental toxins and brain diseases.
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Affiliation(s)
- Xiaoli Gou
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Yongchun Fu
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Juan Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Juan Xiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Minghui Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Yi Zhang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
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40
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Zhang S, Cao J, Yang P, Xie Y, Wang H, Mao Y, Ning K, Zhang Q. Adsorption and aggregation of Cu 2+ on carboxymethylated sugarcane bagasse: Adsorption behavior and mechanism. J Hazard Mater 2024; 465:133297. [PMID: 38141295 DOI: 10.1016/j.jhazmat.2023.133297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/13/2023] [Accepted: 12/14/2023] [Indexed: 12/25/2023]
Abstract
Abundant biomass resources provide us with sufficient material basis, while a large amount of bio-waste is also produced and the high-value utilization of bio-waste is still highly desirable. Herein, we reported a facile one-pot fabrication approach towards efficient utilization of sugarcane bagasse via carboxymethylation to adsorb and recycle Cu2+ ions. The modified sugarcane bagasse possessed outstanding adsorption efficiency, with a maximum capacity of 263.7 mg g-1, owing to the functional groups such as carboxyl and hydroxyl groups, as well as aromatic structure. It was noted that the carboxymethylated sugarcane bagasse (MSB40) swelled rapidly when suffering Cu2+ ions solution, and more adsorption sites were available since the physical diffusion barrier was removed, thereby enhancing the absorption capacity. Interestingly, Cu2+ ions could induce the aggregation of MSB40 due to the Cu2+ ions compress colloid double layer, neutralizes surface charges, which benefited the following separation process. Ultimately, copper oxide was recovered and the purity reached 97.9%. Additionally, in the presence of both Ca2+ and Mg2+ ions, MSB40 exhibited excellent selectivity for the adsorption of Cu2+ ions. This strategy offers a facile and novel clue for the high-value utilization of bio-waste and the recovery of copper for biomaterial and environmental applications.
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Affiliation(s)
- Shiping Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Jinyan Cao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Peng Yang
- Department of Health Products Technical Research and Development Center, Yunnan Baiyao Group Co. Ltd, Kunming 650500, PR China
| | - Yu Xie
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Huiming Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Yufeng Mao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Kegong Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; Department of Health Products Technical Research and Development Center, Yunnan Baiyao Group Co. Ltd, Kunming 650500, PR China.
| | - Qiulin Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, PR China.
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41
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Sternke-Hoffmann R, Sun X, Menzel A, Pinto MDS, Venclovaitė U, Wördehoff M, Hoyer W, Zheng W, Luo J. Phase Separation and Aggregation of α-Synuclein Diverge at Different Salt Conditions. bioRxiv 2024:2024.03.01.582895. [PMID: 38464093 PMCID: PMC10925286 DOI: 10.1101/2024.03.01.582895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
The coacervation and structural rearrangement of the protein alpha-synuclein (αSyn) into cytotoxic oligomers and amyloid fibrils are considered pathological hallmarks of Parkinson's disease. While aggregation is recognized as the key element of amyloid diseases, liquid-liquid phase separation (LLPS) and its interplay with aggregation have gained increasing interest. Previous work showed that factors promoting or inhibiting amyloid formation have similar effects on phase separation. Here, we provide a detailed scanning of a wide range of parameters including protein, salt and crowding concentrations at multiple pH values, revealing different salt dependencies of aggregation and phase separation. The influence of salt on aggregation under crowded conditions follows a non-monotonic pattern, showing increased effects at medium salt concentrations. This behavior can be elucidated through a combination of electrostatic screening and salting-out effects on the intramolecular interactions between the N-terminal and C-terminal regions of αSyn. By contrast, we find a monotonic salt dependence of phase separation due to the intermolecular interaction. Furthermore, we observe the time evolution of the two distinct assembly states, with macroscopic fibrillar-like bundles initially forming at medium salt concentration but subsequently converting into droplets after prolonged incubation. The droplet state is therefore capable of inhibiting aggregation or even dissolving the aggregates through a variety of heterotypic interactions, thus preventing αSyn from its dynamically arrested state.
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Affiliation(s)
- Rebecca Sternke-Hoffmann
- Department of Biology and Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
| | - Xun Sun
- Department of Biology and Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
| | - Andreas Menzel
- Photon Science Division, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
| | - Miriam Dos Santos Pinto
- Department of Biology and Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
| | - Urtė Venclovaitė
- Department of Biology and Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
| | - Michael Wördehoff
- Institut für Physikalische Biologie, Heinrich-Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Wolfgang Hoyer
- Institut für Physikalische Biologie, Heinrich-Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Wenwei Zheng
- College of Integrative Sciences and Arts, Arizona State University, Mesa, AZ, 85212, United States
| | - Jinghui Luo
- Department of Biology and Chemistry, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
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42
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Shi X, Zhang X. Control of ATG14 solubility and autophagy by MARCHF7/MARCH7-mediated ubiquitination. Autophagy 2024; 20:699-700. [PMID: 37915253 PMCID: PMC10936613 DOI: 10.1080/15548627.2023.2278414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 10/30/2023] [Indexed: 11/03/2023] Open
Abstract
Emerging research has unequivocally demonstrated the significance of post-translational modifications (PTMs) of proteins in orchestrating macroautophagy/autophagy regulation. Ubiquitination is a common PTM of proteins that regulates their stability, activity, and localization, thus playing a crucial role in various cellular processes, including autophagy. In recent work, a ubiquitination-related study revealed that MARCHF7/MARCH7 promotes the mixed polyubiquitination of ATG14 at multiple sites, mainly through the linkages of K6, K11, and K63 ubiquitin chains. Consequently, mixed ubiquitination leads to substantial insoluble aggregation of ATG14/ATG14L/Barkor, reducing its interaction with STX17, and ultimately causing a decrease in autophagy flux. It is noteworthy that we have observed that this regulation may hold significant potential value for the autophagic degradation of protein aggregates, as the number of aggresome-like induced structures (ALISs) is markedly reduced in MARCHF7 knockout cells. This may have important potential implications for neurodegenerative diseases characterized by protein aggregation and impaired degradation.
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Affiliation(s)
- Xue Shi
- Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiaofei Zhang
- Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China
- University of Chinese Academy of Sciences, Beijing, China
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Chen S, Guo J, Xu W, Song H, Xu J, Luo C, Yao K, Hu L, Chen X, Yu Y. Cataract-related variant R114C increases βA3-crystallin susceptibility to environmental stresses by disrupting the protein senior structure. Int J Biol Macromol 2024; 262:130191. [PMID: 38360245 DOI: 10.1016/j.ijbiomac.2024.130191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 02/12/2024] [Accepted: 02/12/2024] [Indexed: 02/17/2024]
Abstract
Congenital cataract is a major cause of childhood blindness worldwide, with crystallin mutations accounting for over 40 % of gene-mutation-related cases. Our research focused on a novel R114C mutation in a Chinese family, resulting in bilateral coronary cataract with blue punctate opacity. Spectroscopic experiments revealed that βA3-R114C significantly altered the senior structure, exhibiting aggregation, and reduced solubility at physiological temperature. The mutant also displayed decreased resistance and stability under environmental stresses such as UV irradiation, oxidative stress, and heat. Further, cellular models confirmed its heightened sensitivity to environmental stresses. These data suggest that the R114C mutation impairs the hydrogen bond network and structural stability of βA3-crystallin, particularly at the boundary of the second Greek-key motif. This study revealed the pathological mechanism of βA3-R114C and may help in the development of potential treatment strategies for related cataracts.
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Affiliation(s)
- Silong Chen
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Jiarui Guo
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Wanyue Xu
- Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Hang Song
- Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Jingjie Xu
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Chenqi Luo
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Ke Yao
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Lidan Hu
- The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang Province 310052, China.
| | - Xiangjun Chen
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China; Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kaixuan Road, Hangzhou 310020, China.
| | - Yibo Yu
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China.
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44
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Sreenivasan S, Patil SS, Rathore AS. Does Aggregation of Therapeutic IgGs in PBS Offer a True Picture of What Happens in Models Derived from Human Body Fluids? J Pharm Sci 2024; 113:596-603. [PMID: 37717637 DOI: 10.1016/j.xphs.2023.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/10/2023] [Accepted: 09/11/2023] [Indexed: 09/19/2023]
Abstract
Therapeutic proteins such as monoclonal antibodies (mAb) are known to form aggregates due to various factors. Phosphate buffered saline (PBS), human serum, and human serum filtrate (HSF) are some of the models used to analyze mAb stability in physiologically relevant in-vitro conditions. In this study, aggregation of mAb in PBS and models derived from body fluids seeded with mAb samples subjected to various stresses were compared. Samples containing mAb subjected to pH, temperature, UV light, stirring, and interfacial agitation stress were seeded into different models for 2 case studies. In the first case study, %HMW (high molecular weight species) of mAb in PBS and HSF were compared using size exclusion chromatography. It was found that change in %HMW was higher in PBS compared to HSF. For example, PBS containing mAb that was subjected to UV light stress showed change in HMW by >10 % over 72 h, but the change was <5 % in HSF. In second case study, aggregates particles of FITC tagged mAb were monitored in PBS and serum using fluorescence microscope image processing. It was found that PBS and serum containing mAb subjected to stirring and interfacial agitation resulted in aggregates of >2 µm size, and average size and percentage number of particles having >10 µm size was higher in serum compared to PBS at all analysis time point. Overall, it was found that aggregation of mAb in PBS was different from that in human body fluids. Second case study also showed the importance of advanced strategies for further characterization of mAb in serum.
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Affiliation(s)
- Shravan Sreenivasan
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas-110016, India
| | - Sanjeet S Patil
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas-110016, India
| | - Anurag S Rathore
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas-110016, India.
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45
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Suárez L, Kosar AJ, Dodd EL, Tazoo D, Lambert AC, Bohle DS. Soluble meso and deuteroporphyrin analogs of the malaria pigment hematin anhydride. J Inorg Biochem 2024; 252:112470. [PMID: 38218137 DOI: 10.1016/j.jinorgbio.2023.112470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/18/2023] [Accepted: 12/18/2023] [Indexed: 01/15/2024]
Abstract
Two soluble heme analogs of the insoluble malaria pigment hematin anhydride (HA, or β-hematin), [Fe(III)(protoporphyrin)]2, with either mesoporphyrin (MHA) or deuteroporphyrin (DHA) are characterized by elemental analysis, SEM, IR spectroscopy, electronic spectroscopy, paramagnetic 1H NMR spectroscopy and solution magnetic susceptibility. While prior single crystal and X-ray powder diffraction results indicate all three have a common propionate linked dimer motif, there is considerable solid state variation in the conformation. This is associated with enhanced solubility of MHA and DHA. As with HA, DHA undergoes thermally promoted reversible hydration/dehydration in the solid state. Solution 1H NMR studies of DHA suggest a high spin dimeric structure with the porphyrin methyls distributed between two isomers which are also present in the solid state. These soluble iron(III)porphyrin dimers allow for the first direct solution studies by NMR and UV-Vis spectroscopies of these key species. Taken together the results illustrate the importance and utility of varying the substituents on the periphery of the porphyrin for studying heme aggregation and malaria pigment formation.
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Affiliation(s)
- Liliana Suárez
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal H3A 0B8, Canada
| | - Aaron J Kosar
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal H3A 0B8, Canada
| | - Erin L Dodd
- Département de Chimie de l'UQAM, 2101, rue Jeanne-Mance, Montréal H2X 2J6, Canada
| | - Dagobert Tazoo
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal H3A 0B8, Canada
| | | | - D Scott Bohle
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal H3A 0B8, Canada.
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46
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Lim SH, Wong TW, Tay WX. Overcoming colloidal nanoparticle aggregation in biological milieu for cancer therapeutic delivery: Perspectives of materials and particle design. Adv Colloid Interface Sci 2024; 325:103094. [PMID: 38359673 DOI: 10.1016/j.cis.2024.103094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/15/2024] [Accepted: 01/21/2024] [Indexed: 02/17/2024]
Abstract
Nanoparticles as cancer therapeutic carrier fail in clinical translation due to complex biological environments in vivo consisting of electrolytes and proteins which render nanoparticle aggregation and unable to reach action site. This review identifies the desirable characteristics of nanoparticles and their constituent materials that prevent aggregation from site of administration (oral, lung, injection) to target site. Oral nanoparticles should ideally be 75-100 nm whereas the size of pulmonary nanoparticles minimally affects their aggregation. Nanoparticles generally should carry excess negative surface charges particularly in fasting state and exert steric hindrance through surface decoration with citrate, anionic surfactants and large polymeric chains (polyethylene glycol and polyvinylpyrrolidone) to prevent aggregation. Anionic as well as cationic nanoparticles are both predisposed to protein corona formation as a function of biological protein isoelectric points. Their nanoparticulate surface composition as such should confer hydrophilicity or steric hindrance to evade protein corona formation or its formation should translate into steric hindrance or surface negative charges to prevent further aggregation. Unexpectedly, smaller and cationic nanoparticles are less prone to aggregation at cancer cell interface favoring endocytosis whereas aggregation is essential to enable nanoparticles retention and subsequent cancer cell uptake in tumor microenvironment. Present studies are largely conducted in vitro with simplified simulated biological media. Future aggregation assessment of nanoparticles in biological fluids that mimic that of patients is imperative to address conflicting materials and designs required as a function of body sites in order to realize the future clinical benefits.
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Affiliation(s)
- Shi Huan Lim
- Department of Pharmacy, Faculty of Science, National University of Singapore, 18 Science Drive 4, Republic of Singapore 117543
| | - Tin Wui Wong
- Department of Pharmacy, Faculty of Science, National University of Singapore, 18 Science Drive 4, Republic of Singapore 117543; Non-Destructive Biomedical and Pharmaceutical Research Centre, Smart Manufacturing Research institute, Universiti Teknologi MARA Selangor, Puncak Alam 42300, Selangor, Malaysia; Particle Design Research Group, Faculty of Pharmacy, Universiti Teknologi MARA Selangor, Puncak Alam 42300, Selangor, Malaysia; UM-UiTM Excipient Development Research Unit (EXDEU), Faculty of Pharmacy, Universiti Malaya, Lembah Pantai 50603, Kuala Lumpur, Malaysia.
| | - Wei Xian Tay
- Department of Pharmacy, Faculty of Science, National University of Singapore, 18 Science Drive 4, Republic of Singapore 117543
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47
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Xiong L, Zhang F, Yang Y, Ding Y, Chen S. Preparation of a novel polypyrrole/dolomite composite adsorbent for efficient removal of Cr(VI) from aqueous solution. Environ Sci Pollut Res Int 2024; 31:21279-21290. [PMID: 38388974 DOI: 10.1007/s11356-024-32526-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 02/14/2024] [Indexed: 02/24/2024]
Abstract
A novel adsorbent, deposited PPy on the DMI (PPy/DMI) composite, was successfully synthesized for Cr(VI) removal from aqueous solution. PPy/DMI composite was characterized by BET, SEM, TEM, XRD, and XPS. The SEM and TEM analyses revealed that DMI can greatly reduce the aggregation of PPy and significantly enhance its adsorption performance. The Cr(VI) removal was highly pH dependent. The high selectivity of PPy/DMI composite for Cr(VI) removal was found even in the presence of co-existing ions. The adsorption kinetic process followed the pseudo-second-order equation, demonstrating that the Cr(VI) adsorption behavior onto PPy/DMI is chemisorption. Furthermore, the intra-particle diffusion model implied that the adsorption was controlled by both liquid membrane diffusion and internal diffusion. The adsorption isotherm data fitted well with the Langmuir model with the maximum adsorption capacity (406.50 mg/g at 323 K) which was considerably higher than that of other PPy-based adsorbents. The Cr(VI) adsorption onto PPy/DMI composite was endothermic. The main mechanisms of Cr(VI) removal are involved in adsorption through electrostatic attractions, ion exchange, and in situ reduction. The results suggested that PPy/DMI composite could be a promising candidate for efficient Cr(VI) removal from aqueous solution.
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Affiliation(s)
- Ling Xiong
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, China
| | - Fen Zhang
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, China
| | - Yanan Yang
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, China
| | - Yuqing Ding
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, China
| | - Shaohua Chen
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, China.
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48
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Wang T, Xu Y, Ling W, Mosa A, Liu S, Lin Z, Wang H, Hu X. Dissemination of antibiotic resistance genes is regulated by iron oxides: Insight into the influence on bacterial transformation. Environ Int 2024; 185:108499. [PMID: 38368718 DOI: 10.1016/j.envint.2024.108499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/27/2023] [Accepted: 02/11/2024] [Indexed: 02/20/2024]
Abstract
The transportation of antibiotic resistance genes (ARGs) in manure-soil-plant continuums poses risks to human health. Horizontal gene transfer, particularly for bacterial transformation, is an important way for ARG dissemination. As crucial components in soils, iron oxides impacted the fates of various abiotic and biotic contaminants due to their active properties. However, whether they can influence the transformation of ARGs is unknown, which waits to be figured out to boost the assessment and control of ARG spread risks. In this study, we have investigated the effects of goethite, hematite, and magnetite (0-250 mg/L, with sizes < 100 nm and > 100 nm) on the transfer of ampicillin resistance genes to Escherichia coli cells. At lower iron oxide concentrations, the transformation of ARGs was first facilitated (transformation frequency reached up to 3.38-fold higher), but the facilitating effects gradually weakened and eventually disappeared as concentrations further increased. Particle size and iron oxide type were not the universal determinants controlling the transformation. At lower concentrations, iron oxides interacted with proteins and phospholipids in E. coli envelope structures, and induced the overgeneration of intracellular reactive oxygen species. Consequently, they led to pore formation and permeability enhancement on the cell membrane, thus promoting the transformation. The facilitation was also associated with the carrier-like effect of iron oxides for antibiotic resistance plasmids. At higher concentrations, the weakened facilitations were attributed to the aggregation of iron oxides. In this study, we highlight the crucial roles of the concentrations (contents) of iron oxides on the dissemination of ARGs in soils; this study may serve as a reference for ARG pollution control in future agricultural production.
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Affiliation(s)
- Tingting Wang
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yanxing Xu
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Wanting Ling
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Ahmed Mosa
- Soils Department, Faculty of Agriculture, Mansoura University, 35516 Mansoura, Egypt
| | - Si Liu
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Zhipeng Lin
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hefei Wang
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xiaojie Hu
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.
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49
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Bruggeman DF, Detz RJ, Mathew S, Reek JNH. Increased solar-driven chemical transformations through surface-induced benzoperylene aggregation in dye-sensitized photoanodes. Photochem Photobiol Sci 2024; 23:503-516. [PMID: 38363531 DOI: 10.1007/s43630-024-00534-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 01/04/2024] [Indexed: 02/17/2024]
Abstract
The impact of benzo[ghi]perylenetriimide (BPTI) dye aggregation on the performance of photoelectrochemical devices was explored, through imide-substitution with either alkyl (BPTI-A, 2-ethylpropyl) or bulky aryl (BPTI-B, 2,6-diisopropylphenyl) moieties, to, respectively, enable or suppress aggregation. While both dyes demonstrated similar monomeric optoelectronic properties in solution, adsorption onto mesoporous SnO2 revealed different behavior, with BPTI-A forming aggregates via π-stacking and BPTI-B demonstrating reduced aggregation in the solid state. BPTI photoanodes were tested in dye-sensitized solar cells (DSSCs) before application to dye-sensitized photoelectrochemical cells (DSPECs) for Br2 production (a strong oxidant) coupled to H2 generation (a solar fuel). BPTI-A demonstrated a twofold higher dye loading of the SnO2 surface than BPTI-B, resulting in a fivefold enhancement to both photocurrent and Br2 production. The enhanced output of the photoelectrochemical systems (with respect to dye loading) was attributed to both J- and H- aggregation phenomena in BPTI-A photoanodes that lead to improved light harvesting. Our investigation provides a strategy to exploit self-assembly via aggregation to improve molecular light-harvesting and charge separation properties that can be directly applied to dye-sensitized photoelectrochemical devices.
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Affiliation(s)
- Didjay F Bruggeman
- Homogeneous, Supramolecular and Bioinspired Catalysis, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Remko J Detz
- Energy Transition Studies, Netherlands Organization for Applied Scientific Research (TNO), Radarweg 60, Amsterdam, The Netherlands
| | - Simon Mathew
- Homogeneous, Supramolecular and Bioinspired Catalysis, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Joost N H Reek
- Homogeneous, Supramolecular and Bioinspired Catalysis, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands.
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50
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Una R, Glimm T. A Cellular Potts Model of the interplay of synchronization and aggregation. PeerJ 2024; 12:e16974. [PMID: 38435996 PMCID: PMC10909357 DOI: 10.7717/peerj.16974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 01/29/2024] [Indexed: 03/05/2024] Open
Abstract
We investigate the behavior of systems of cells with intracellular molecular oscillators ("clocks") where cell-cell adhesion is mediated by differences in clock phase between neighbors. This is motivated by phenomena in developmental biology and in aggregative multicellularity of unicellular organisms. In such systems, aggregation co-occurs with clock synchronization. To account for the effects of spatially extended cells, we use the Cellular Potts Model (CPM), a lattice agent-based model. We find four distinct possible phases: global synchronization, local synchronization, incoherence, and anti-synchronization (checkerboard patterns). We characterize these phases via order parameters. In the case of global synchrony, the speed of synchronization depends on the adhesive effects of the clocks. Synchronization happens fastest when cells in opposite phases adhere the strongest ("opposites attract"). When cells of the same clock phase adhere the strongest ("like attracts like"), synchronization is slower. Surprisingly, the slowest synchronization happens in the diffusive mixing case, where cell-cell adhesion is independent of clock phase. We briefly discuss potential applications of the model, such as pattern formation in the auditory sensory epithelium.
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Affiliation(s)
- Rose Una
- Department of Mathematics, Western Washington University, Bellingham, WA, United States of America
| | - Tilmann Glimm
- Department of Mathematics, Western Washington University, Bellingham, WA, United States of America
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