51
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Rajendran D, Chandrasekaran N. Unveiling the Modification of Esterase-like Activity of Serum Albumin by Nanoplastics and Their Cocontaminants. ACS OMEGA 2023; 8:43719-43731. [PMID: 38027364 PMCID: PMC10666218 DOI: 10.1021/acsomega.3c05447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 09/29/2023] [Indexed: 12/01/2023]
Abstract
Nanoplastics and other cocontaminants have raised concerns due to their widespread presence in the environment and their potential to enter the food chain. The harmful effects of these particles depend on various factors, such as nanoparticle size, shape, surface charge, and the nature of the cocontaminants involved. On entering the human body, human serum albumin (HSA) molecules bind and transport these particles in the blood system. The esterase-like activity of HSA, which plays a role in metabolizing drug/toxic compounds, was taken as a representative to portray the effects of these particles on HSA. Polystyrene nanoplastics (PSNPs) with different surface functionalization (plain (PS), amine (PS-NH2), and carboxy (PS-COOH)), different sizes (100 and 500 nm), and PS with cocontaminant metformin hydrochloride (Met-HCl), a widely used antidiabetic drug, were investigated in this study. Fluorescence emission spectra of HSA revealed that PS-NH2 exhibits a greater effect on protein conformation, smaller NPs have a greater influence on protein structure than larger NPs, and Met-HCl lowers PSNPs' affinity for HSA by coating the surface of the NPs, which may result in direct NP distribution to the drug's target organs and toxicity. Circular dichroism spectra also supported these results in terms of secondary structural changes. Esterase activity of HSA was inhibited by all the particles (except Met-HCl) by competitive inhibition as concluded from constant Vmax and increasing Km. Greater reduction in enzyme activity was observed for PS-NH2 among functionalizations and for 100 nm PS among sizes. Furthermore, Met-HCl lowers the inhibitory impact of PSNPs on HSA since the drug binds weakly to HSA, and so they can serve as a vector delivering PSNPs to their target organs, resulting in serious implications.
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Affiliation(s)
- Durgalakshmi Rajendran
- Centre for Nanobiotechnology, Vellore Institute of Technology (VIT University), Vellore 632014, Tamil Nadu, India
| | - Natarajan Chandrasekaran
- Centre for Nanobiotechnology, Vellore Institute of Technology (VIT University), Vellore 632014, Tamil Nadu, India
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52
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Mahran R, Vello N, Komulainen A, Malakoutikhah M, Härmä H, Kopra K. Isothermal chemical denaturation assay for monitoring protein stability and inhibitor interactions. Sci Rep 2023; 13:20066. [PMID: 37973851 PMCID: PMC10654576 DOI: 10.1038/s41598-023-46720-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/03/2023] [Indexed: 11/19/2023] Open
Abstract
Thermal shift assay (TSA) with altered temperature has been the most widely used method for monitoring protein stability for drug research. However, there is a pressing need for isothermal techniques as alternatives. This urgent demand arises from the limitations of TSA, which can sometimes provide misleading ranking of protein stability and fail to accurately reflect protein stability under physiological conditions. Although differential scanning fluorimetry has significantly improved throughput in comparison to differential scanning calorimetry and differential static light scattering throughput, all these methods exhibit moderate sensitivity. In contrast, current isothermal chemical denaturation (ICD) techniques may not offer the same throughput capabilities as TSA, but it provides more precise information about protein stability and interactions. Unfortunately, ICD also suffers from limited sensitivity, typically in micromolar range. We have developed a novel method to overcome these challenges, namely throughput and sensitivity. The novel Förster Resonance Energy Transfer (FRET)-Probe as an external probe is highly applicable to isothermal protein stability monitoring but also to conventional TSA. We have investigated ICD for multiple proteins with focus on KRASG12C with covalent inhibitors and three chemical denaturants performed at nanomolar protein concentration. Data showed corresponding inhibitor-induced stabilization of KRASG12C to those reported by nucleotide exchange assay.
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Affiliation(s)
- Randa Mahran
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500, Turku, Finland.
| | - Niklas Vello
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500, Turku, Finland
| | - Anita Komulainen
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500, Turku, Finland
| | | | - Harri Härmä
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500, Turku, Finland
| | - Kari Kopra
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500, Turku, Finland
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53
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Zhou S, Meng L, Lin Y, Dong X, Dong M. Exploring the Interactions of Soybean 7S Globulin with Gallic Acid, Chlorogenic Acid and (-)-Epigallocatechin Gallate. Foods 2023; 12:4013. [PMID: 37959132 PMCID: PMC10649178 DOI: 10.3390/foods12214013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
In this study, the noncovalent interaction mechanisms between soybean 7S globulin and three polyphenols (gallic acid (GA), chlorogenic acid (CA) and (-)-epigallocatechin gallate (EGCG)) were explored and compared using various techniques. Fluorescence experiments showed that GA and EGCG had strong static quenching effects on 7S fluorescence, and that of CA was the result of multiple mechanisms. The interactions caused changes to the secondary and tertiary structure of 7S, and the surface hydrophobicity was decreased. Thermodynamic experiments showed that the combinations of polyphenols with 7S were exothermic processes. Hydrogen bonds and van der Waals forces were the primary driving forces promoting the binding of EGCG and CA to 7S. The combination of GA was mainly affected by electrostatic interaction. The results showed that the structure and molecular weight of polyphenols play an important role in their interactions. This work is helpful for developing products containing polyphenols and soybean protein.
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Affiliation(s)
- Siduo Zhou
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250013, China;
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Ling Meng
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- School of Public Health, Shandong First Medical University, Shandong Academy of Medical Sciences, 6699 Qingdao Road, Jinan 250117, China
| | - Yanfei Lin
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xueqian Dong
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250013, China;
| | - Mingsheng Dong
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
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54
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Rajendran D, Chandrasekaran N. Molecular Interaction of Functionalized Nanoplastics with Human Hemoglobin. J Fluoresc 2023; 33:2257-2272. [PMID: 37014521 DOI: 10.1007/s10895-023-03221-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 03/21/2023] [Indexed: 04/05/2023]
Abstract
Humans are exposed to excessive nanoplastics (NPs) which have ample affinity for globular proteins. We investigated the interaction of functionalized polystyrene nanoplastics (plain: PS, carboxy: PS-COOH, and amine: PS-NH2) with human hemoglobin (Hb) utilizing multi-spectroscopic and docking approaches to acquire insights into molecular aspects of binding mechanism, which will be helpful in assessing the toxicokinetics or toxicodynamics of nanoplastics NPs. Hypsochromicity and hypochromicity were observed invariably in all the spectra (steady-state fluorescence emission, synchronous and three-dimensional) for all complexes, among which PS-NH2 binds effectively and changes the Hb's conformation by enhancing hydrophobicity around aromatic residues, notably tryptophan. All the NPs bind with the hydrophobic pocket of B-chain in Hb, where PS and PS-NH2 bind via hydrophobic force while PS-COOH binds via hydrogen bonding (predominantly) and van der Waals force, consistent validated with docking results. The minimal shift in absorbance peak also indicates enhanced hydrophobicity by PS-NH2 with larger aggregation as demonstrated in resonance light scattering. The amide band's shift, secondary structural analysis, and presence of characteristic functional group peaks in complexes in Infra-Red spectra confirm the structural changes in the protein. As seen in field emission scanning microscopy images, NPs penetrate the surface of proteins. These findings conclude that polystyrene NPs interact with Hb, causing structural alterations that may affect functional characteristics as well, with the greatest effect being in the order: PS-NH2>PS-COOH>PS.
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Affiliation(s)
- Durgalakshmi Rajendran
- Centre for Nanobiotechnology, Vellore Institute of Technology, Tamil Nadu, Vellore, 632014, India
| | - Natarajan Chandrasekaran
- Centre for Nanobiotechnology, Vellore Institute of Technology, Tamil Nadu, Vellore, 632014, India.
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55
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Xie Y, Butler M. Multi-attribute analysis of adeno-associated virus by size exclusion chromatography with fluorescence and triple-wavelength UV detection. Anal Biochem 2023; 680:115311. [PMID: 37666384 DOI: 10.1016/j.ab.2023.115311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 09/06/2023]
Abstract
Adeno-associated virus (AAV) is the leading platform for in vivo gene therapy to treat numerous genetic diseases. Comprehensive analysis of the AAV particles is essential to ensure desired safety and efficacy. An array of techniques is required to evaluate their critical quality attributes. However, many of these techniques are expensive, time-consuming, labour-intensive, and varying in accuracy. Size exclusion chromatography coupled with fluorescence and triple-wavelength ultraviolet detection (SEC-FLD-TWUV) and incorporating an aromatic amino acid of tryptophan as an internal standard offers a simple, rapid, and reliable approach for simultaneous multi-attribute analysis of AAVs. In the current study, we demonstrate its capability for AAV characterization and quantification, that includes capsid concentration, empty to full capsid ratio, vector genome concentration, and the presence of aggregates or fragments. All were performed in 20-min chromatographic runs with minimal sample handling. Data analysis involves the assessment of intrinsic fluorescence and UV absorbance of samples at three wavelengths that can be utilised to determine the content of the capsid protein and genome copy number. The separation efficiency using SEC columns with different pore sizes, and elution buffers of varying compositions, ionic strength, and pH values was also evaluated. This SEC-FLD-TWUV method may serve as a powerful yet cost-effective tool for responsive quality evaluation of AAVs. This may enhance performance, robustness, and safety of bioprocessing for AAV vectors to be used in gene therapy.
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Affiliation(s)
- Yongjing Xie
- National Institute for Bioprocessing Research and Training, Foster Avenue, Mount Merrion, Blackrock, Co. Dublin, A94 X099, Ireland
| | - Michael Butler
- National Institute for Bioprocessing Research and Training, Foster Avenue, Mount Merrion, Blackrock, Co. Dublin, A94 X099, Ireland; School of Chemical and Bioprocess Engineering, University College Dublin (UCD), Belfield, Dublin 4, D04 V1W8, Ireland.
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56
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Spiga L, Fansler RT, Perera YR, Shealy NG, Munneke MJ, David HE, Torres TP, Lemoff A, Ran X, Richardson KL, Pudlo N, Martens EC, Folta-Stogniew E, Yang ZJ, Skaar EP, Byndloss MX, Chazin WJ, Zhu W. Iron acquisition by a commensal bacterium modifies host nutritional immunity during Salmonella infection. Cell Host Microbe 2023; 31:1639-1654.e10. [PMID: 37776864 PMCID: PMC10599249 DOI: 10.1016/j.chom.2023.08.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/06/2023] [Accepted: 08/29/2023] [Indexed: 10/02/2023]
Abstract
During intestinal inflammation, host nutritional immunity starves microbes of essential micronutrients, such as iron. Pathogens scavenge iron using siderophores, including enterobactin; however, this strategy is counteracted by host protein lipocalin-2, which sequesters iron-laden enterobactin. Although this iron competition occurs in the presence of gut bacteria, the roles of commensals in nutritional immunity involving iron remain unexplored. Here, we report that the gut commensal Bacteroides thetaiotaomicron acquires iron and sustains its resilience in the inflamed gut by utilizing siderophores produced by other bacteria, including Salmonella, via a secreted siderophore-binding lipoprotein XusB. Notably, XusB-bound enterobactin is less accessible to host sequestration by lipocalin-2 but can be "re-acquired" by Salmonella, allowing the pathogen to evade nutritional immunity. Because the host and pathogen have been the focus of studies of nutritional immunity, this work adds commensal iron metabolism as a previously unrecognized mechanism modulating the host-pathogen interactions and nutritional immunity.
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Affiliation(s)
- Luisella Spiga
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Ryan T Fansler
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Yasiru R Perera
- Departments of Biochemistry and Chemistry and Center for Structural Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Nicolas G Shealy
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Matthew J Munneke
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Holly E David
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Teresa P Torres
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Andrew Lemoff
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Xinchun Ran
- Departments of Chemistry, Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37232, USA
| | - Katrina L Richardson
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Nicholas Pudlo
- Department of Microbiology & Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Eric C Martens
- Department of Microbiology & Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Ewa Folta-Stogniew
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, CT 06511, USA
| | - Zhongyue J Yang
- Departments of Chemistry, Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37232, USA
| | - Eric P Skaar
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Mariana X Byndloss
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Walter J Chazin
- Departments of Biochemistry and Chemistry and Center for Structural Biology, Vanderbilt University, Nashville, TN 37232, USA.
| | - Wenhan Zhu
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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57
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He C, Wang Y, Waldfried C, Yang G, Zheng JF, Hu S, Tang HX. Ultra-high Q alumina optical microresonators in the UV and blue bands. OPTICS EXPRESS 2023; 31:33923-33929. [PMID: 37859161 DOI: 10.1364/oe.492510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/12/2023] [Indexed: 10/21/2023]
Abstract
UV and visible photonics enable applications ranging from spectroscopic sensing to communication and quantum information processing. Photonics structures in these wavelength regimes, however, tend to experience higher loss than their IR counterpart. Particularly in the near-UV band, on-chip optical microresonators have not yet achieved a quality factor beyond 1 million. Here, we report ultra-low-loss photonic waveguides and resonators patterned from alumina thin films prepared by a highly scalable atomic layer deposition process. We demonstrate ultra high Q factor of 1.5×106 at 390 nm, a record value at UV bands, and 1.9×106 at 488.5 nm.
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58
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Aboulkassim T, Tian X, Liu Q, Qiu D, Hancock M, Wu JH, Batist G. A NRF2 inhibitor selectively sensitizes KEAP1 mutant tumor cells to cisplatin and gefitinib by restoring NRF2-inhibitory function of KEAP1 mutants. Cell Rep 2023; 42:113104. [PMID: 37703174 DOI: 10.1016/j.celrep.2023.113104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 06/09/2023] [Accepted: 08/23/2023] [Indexed: 09/15/2023] Open
Abstract
NRF2 (nuclear factor erythroid 2-related factor 2) is a master regulator of protective responses in healthy tissues. However, when it is active in tumor cells, it can result in drug resistance. KEAP1, the endogenous NRF2 inhibitor, binds NRF2 and redirects it to proteasomal degradation, so the KEAP1/NRF2 interaction is critical for maintaining NRF2 at a basal level. A number of clinically relevant KEAP1 mutations were shown to disrupt this critical KEAP1/NRF2 interaction, leading to elevated NRF2 levels and drug resistance. Here, we describe a small-molecule NRF2 inhibitor, R16, that selectively binds KEAP1 mutants and restores their NRF2-inhibitory function by repairing the disrupted KEAP1/NRF2 interactions. R16 substantially sensitizes KEAP1-mutated tumor cells to cisplatin and gefitinib, but does not do so for wild-type KEAP1 cells, and sensitizes KEAP1 G333C-mutated xenograft to cisplatin. We developed a BRET2-based biosensor system to detect the KEAP1/NRF2 interaction and classify KEAP1 mutations. This strategy would identify drug-resistant KEAP1 somatic mutations in clinical molecular profiling of tumors.
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Affiliation(s)
- Tahar Aboulkassim
- Segal Cancer Center and McGill University Centre for Translational Research in Cancer, Lady Davis Institute, Jewish General Hospital, Montreal, QC H3T 1E2, Canada
| | - Xiaohong Tian
- Segal Cancer Center and McGill University Centre for Translational Research in Cancer, Lady Davis Institute, Jewish General Hospital, Montreal, QC H3T 1E2, Canada
| | - Qiang Liu
- Segal Cancer Center and McGill University Centre for Translational Research in Cancer, Lady Davis Institute, Jewish General Hospital, Montreal, QC H3T 1E2, Canada
| | - Dinghong Qiu
- Segal Cancer Center and McGill University Centre for Translational Research in Cancer, Lady Davis Institute, Jewish General Hospital, Montreal, QC H3T 1E2, Canada
| | - Mark Hancock
- Department of Pharmacology & Therapeutics, Faculty of Medicine, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Jian Hui Wu
- Segal Cancer Center and McGill University Centre for Translational Research in Cancer, Lady Davis Institute, Jewish General Hospital, Montreal, QC H3T 1E2, Canada; Gerald Bronfman Department of Oncology, Faculty of Medicine, McGill University, Montreal, QC H4A 3T2, Canada.
| | - Gerald Batist
- Segal Cancer Center and McGill University Centre for Translational Research in Cancer, Lady Davis Institute, Jewish General Hospital, Montreal, QC H3T 1E2, Canada; Gerald Bronfman Department of Oncology, Faculty of Medicine, McGill University, Montreal, QC H4A 3T2, Canada.
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59
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Guo F, An J, Wang M, Zhang W, Chen C, Mao X, Liu S, Wang P, Ren F. Inhibitory Mechanism of Quercimeritrin as a Novel α-Glucosidase Selective Inhibitor. Foods 2023; 12:3415. [PMID: 37761124 PMCID: PMC10528180 DOI: 10.3390/foods12183415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/07/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
In this study, 12 flavonoid glycosides were selected based on virtual screening and the literature, and Quercimeritrin was selected as the best selective inhibitor of α-glucosidase through in vitro enzyme activity inhibition experiments. Its IC50 value for α-glucosidase was 79.88 µM, and its IC50 value for α-amylase >250 µM. As such, it could be used as a new selective inhibitor of α-glucosidase. The selective inhibition mechanism of Quercimeritrin on the two starch-digesting enzymes was further explored, and it was confirmed that Quercimeritrin had a strong binding affinity for α-glucosidase and occupied the binding pocket of α-glucosidase through non-covalent binding. Subsequently, animal experiments demonstrated that Quercimeritrin can effectively control postprandial blood glucose in vivo, with the same inhibitory effect as acarbose but without side effects. Our results, therefore, provide insights into how flavone aglycones can be used to effectively control the rate of digestion to improve postprandial blood glucose levels.
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Affiliation(s)
- Fengyu Guo
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (F.G.); (X.M.)
| | - Jie An
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (J.A.); (M.W.); (W.Z.); (C.C.); (S.L.)
| | - Minlong Wang
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (J.A.); (M.W.); (W.Z.); (C.C.); (S.L.)
| | - Weibo Zhang
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (J.A.); (M.W.); (W.Z.); (C.C.); (S.L.)
| | - Chong Chen
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (J.A.); (M.W.); (W.Z.); (C.C.); (S.L.)
| | - Xueying Mao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (F.G.); (X.M.)
| | - Siyuan Liu
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (J.A.); (M.W.); (W.Z.); (C.C.); (S.L.)
- Food Laboratory of Zhongyuan, China Agricultural University, Beijing 100083, China
| | - Pengjie Wang
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (J.A.); (M.W.); (W.Z.); (C.C.); (S.L.)
- Food Laboratory of Zhongyuan, China Agricultural University, Beijing 100083, China
| | - Fazheng Ren
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (F.G.); (X.M.)
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60
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Mosseri A, Sancho-Albero M, Mercurio FA, Leone M, De Cola L, Romanelli A. Tryptophan-PNA gc Conjugates Self-Assemble to Form Fibers. Bioconjug Chem 2023; 34:1429-1438. [PMID: 37486977 PMCID: PMC10436247 DOI: 10.1021/acs.bioconjchem.3c00200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 07/07/2023] [Indexed: 07/26/2023]
Abstract
Peptide nucleic acids and their conjugates to peptides can self-assemble and generate complex architectures. In this work, we explored the self-assembly of PNA dimers conjugated to the dipeptide WW. Our studies suggest that the indole ring of tryptophan promotes aggregation of the conjugates. The onset of fluorescence is observed upon self-assembly. The structure of self-assembled WWgc is concentration-dependent, being spherical at low concentrations and fibrous at high concentrations. As suggested by molecular modeling studies, fibers are stabilized by stacking interactions between tryptophans and Watson-Crick hydrogen bonds between nucleobases.
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Affiliation(s)
- Andrea Mosseri
- Dipartimento
di Scienze Farmaceutiche, Università
Degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
| | - María Sancho-Albero
- Department
of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milano, Italy
| | - Flavia Anna Mercurio
- Istituto
di Biostrutture e Bioimmagini—CNR, via Pietro Castellino 111, 80131 Naples, Italy
| | - Marilisa Leone
- Istituto
di Biostrutture e Bioimmagini—CNR, via Pietro Castellino 111, 80131 Naples, Italy
| | - Luisa De Cola
- Dipartimento
di Scienze Farmaceutiche, Università
Degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
- Department
of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milano, Italy
| | - Alessandra Romanelli
- Dipartimento
di Scienze Farmaceutiche, Università
Degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
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61
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Hernández-Ochoa B, Ortega-Cuellar D, González-Valdez A, Martínez-Rosas V, Morales-Luna L, Rojas-Alarcón MA, Vázquez-Bautista M, Arreguin-Espinosa R, Pérez de la Cruz V, Castillo-Rodríguez RA, Canseco-Ávila LM, Vidal-Limón A, Gómez-Manzo S. An Overall View of the Functional and Structural Characterization of Glucose-6-Phosphate Dehydrogenase Variants in the Mexican Population. Int J Mol Sci 2023; 24:12691. [PMID: 37628871 PMCID: PMC10454679 DOI: 10.3390/ijms241612691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/05/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) deficiency, affecting an estimated 500 million people worldwide, is a genetic disorder that causes human enzymopathies. Biochemical and genetic studies have identified several variants that produce different ranges of phenotypes; thus, depending on its severity, this enzymopathy is classified from the mildest (Class IV) to the most severe (Class I). Therefore, understanding the correlation between the mutation sites of G6PD and the resulting phenotype greatly enhances the current knowledge of enzymopathies' phenotypic and genotypic heterogeneity, which will assist both clinical diagnoses and personalized treatments for patients with G6PD deficiency. In this review, we analyzed and compared the structural and functional data from 21 characterized G6PD variants found in the Mexican population that we previously characterized. In order to contribute to the knowledge regarding the function and structure of the variants associated with G6PD deficiency, this review aimed to determine the molecular basis of G6PD and identify how these mutations could impact the structure, stability, and function of the enzyme and its relation with the clinical manifestations of this disease.
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Affiliation(s)
- Beatriz Hernández-Ochoa
- Laboratorio de Inmunoquímica, Hospital Infantil de México Federico Gómez, Secretaría de Salud, Mexico City 06720, Mexico;
| | - Daniel Ortega-Cuellar
- Laboratorio de Nutrición Experimental, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico;
| | - Abigail González-Valdez
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico;
| | - Víctor Martínez-Rosas
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico; (V.M.-R.); (L.M.-L.); (M.A.R.-A.); (M.V.-B.)
- Programa de Posgrado en Biomedicina y Biotecnología Molecular, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11340, Mexico
| | - Laura Morales-Luna
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico; (V.M.-R.); (L.M.-L.); (M.A.R.-A.); (M.V.-B.)
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Miriam Abigail Rojas-Alarcón
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico; (V.M.-R.); (L.M.-L.); (M.A.R.-A.); (M.V.-B.)
- Programa de Posgrado en Biomedicina y Biotecnología Molecular, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11340, Mexico
| | - Montserrat Vázquez-Bautista
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico; (V.M.-R.); (L.M.-L.); (M.A.R.-A.); (M.V.-B.)
- Programa de Posgrado en Biomedicina y Biotecnología Molecular, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11340, Mexico
| | - Roberto Arreguin-Espinosa
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico;
| | - Verónica Pérez de la Cruz
- Neurobiochemistry and Behavior Laboratory, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico;
| | | | - Luis Miguel Canseco-Ávila
- Facultad de Ciencias Químicas, Campus IV, Universidad Autónoma de Chiapas, Tapachula City 30580, Mexico;
| | - Abraham Vidal-Limón
- Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C. (INECOL), Carretera Antigua a Coatepec 351, El Haya, Xalapa 91073, Mexico;
| | - Saúl Gómez-Manzo
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico; (V.M.-R.); (L.M.-L.); (M.A.R.-A.); (M.V.-B.)
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Deshmukh A, Goyal R, Sundaram K, Dange K, Lakhote T, Niranjan S, Bharucha J, Mishra A, Vats B, Tiwari S. Analytical sameness methodology for the evaluation of structural, physicochemical, and biological characteristics of Armlupeg: A pegfilgrastim biosimilar case study. PLoS One 2023; 18:e0289745. [PMID: 37556495 PMCID: PMC10411777 DOI: 10.1371/journal.pone.0289745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 07/25/2023] [Indexed: 08/11/2023] Open
Abstract
Pegfilgrastim is administered as an adjunct to chemotherapy to reduce the incidence of febrile neutropenia and associated infectious complications. Lupin's Pegfilgrastim is a proposed biosimilar to the U.S.-referenced Neulasta®. Demonstration of biosimilarity requires extensive physicochemical and functional characterization of the biosimilar, and demonstration of analytical similarity to the reference product, in addition to clinical studies. This work is a case study for demonstrating the analytical similarity of Armlupeg (Lupin's Pegfilgrastim) to Neulasta® with respect to structural and physicochemical attributes using several robust, orthogonal, and state-of-the-art techniques including high-end liquid chromatography, mass spectrometry, and spectroscopy techniques; circular dichroism; differential scanning calorimetry; nuclear magnetic resonance; analytical ultracentrifugation; and micro-flow imaging. Functional similarity was demonstrated using an in vitro cell proliferation assay to measure relative potency and surface plasmon resonance to measure receptor binding kinetics. Furthermore, comparative forced-degradation studies were performed to study the degradation of the products under stress conditions. The product attributes were ranked based on a critical quality attributes risk score according to their potential clinical impact. Based on criticality, all analyses were statistically evaluated to conclude analytical similarity. Lupin's Pegfilgrastim was comparable to Neulasta® as demonstrated via structural, functional, and purity analyses. Lupin's Pegfilgrastim complied with the quality and statistical ranges established using Neulasta®. Both products follow the same degradation pathways under stress conditions as observed in the forced-degradation studies. No new impurity or degradation product was observed in Lupin's Pegfilgrastim. These data conclusively demonstrate the analytical similarity of Lupin's Pegfilgrastim and Neulasta®.
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Affiliation(s)
- Arati Deshmukh
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Rishank Goyal
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Kalyana Sundaram
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Kaustubh Dange
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Tejshri Lakhote
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Sanjay Niranjan
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Jennifer Bharucha
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Ashok Mishra
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Bhavesh Vats
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
| | - Sanjay Tiwari
- Research and Development, Lupin Limited (Biotechnology Division), Pune, Maharashtra, India
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Kim JY, Li ZP, Lee G, Kim JH, Shah AB, Lee YH, Park KH. Investigation of bacterial neuraminidase inhibition of xanthones bearing geranyl and prenyl groups from Cratoxylum cochinchinense. Front Chem 2023; 11:1245071. [PMID: 37621851 PMCID: PMC10445491 DOI: 10.3389/fchem.2023.1245071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 07/28/2023] [Indexed: 08/26/2023] Open
Abstract
Introduction: The root of Cratoxylum cochinchinense has been widely used as Chinese folk medicine to cure fevers, burns, and abdominal complications because it contains various bioactive metabolites such as xanthones, triterpenes, and flavonoids. In this study, we estimated bacterial neuraminidase inhibition with a series of xanthones from C. cochinchinense. BNA has connected to various biological functions such as pathogenic bacteria infection inflammatory process after infection and biofilm formation. Methods: The identification of xanthones (1-6) bearing geranyl and prenyl groups was established by spectroscopic data using UV, IR, NMR, and HREIMS. BNA inhibitory modes of isolated xanthones were investigated by Double-reciprocal plots. Moreover, the competitive inhibitor was evaluated the additional kinetic modes determined by kinetic parameters (k 3, k 4, and K i app). The molecular docking (MD) and molecular dynamics simulations (MDS) studies also provided the critical information regarding the role of the geranyl and prenyl groups against BNA inhibition. Results: A series of xanthones (1-6) appended prenyl and geranyl groups on the A-ring were isolated, and compounds 1-3 were shown to be new xanthones. The analogues within this series were highly inhibited with excellent affinity against bacterial neuraminidase (BNA). A subtle change in the prenyl or geranyl motif affected the inhibitory potency and behavior significantly. For example, the inhibitory potency and binding affinity resulting from the geranyl group on C4: xanthone 1 (IC50 = 0.38 μM, KA = 2.4434 × 105 L·mol-1) were 100-fold different from those of xanthone 3 (IC50 = 35.8 μM, KA = 0.0002 × 105 L·mol-1). The most potent compound 1 was identified as a competitive inhibitor which interacted with BNA under reversible slow-binding inhibition: K i app = 0.1440 μM, k 3 = 0.1410 μM-1s-1, and k 4 = 0.0203 min-1. The inhibitory potencies (IC50) were doubly confirmed by the binding affinities (KA). Discussion: This study suggests the potential of xanthones derived from C. cochinchinense as promising candidates for developing novel BNA inhibitors. Further research and exploration of these xanthones may contribute to the development of effective treatments for bacterial infections and inflammatory processes associated with BNA activity.
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Affiliation(s)
- Jeong Yoon Kim
- Department of Pharmaceutical Engineering, Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, Republic of Korea
| | - Zuo Peng Li
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, China
| | - Gihwan Lee
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, Republic of Korea
| | - Jeong Ho Kim
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, Republic of Korea
| | - Abdul Bari Shah
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, Republic of Korea
| | - Yong Hyun Lee
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, Republic of Korea
| | - Ki Hun Park
- Division of Applied Life Science (BK21 Four), Institute of Agriculture and Life Science (IALS), Gyeongsang National University, Jinju, Republic of Korea
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Pérez-Jover I, Rochon K, Hu D, Mohan PM, Santos-Perez I, Gisasola JO, Galvez JMM, Agirre J, Qi X, Mears JA, Shnyrova AV, Ramachandran R. Allosteric control of dynamin-related protein 1-catalyzed mitochondrial fission through a conserved disordered C-terminal Short Linear Motif. RESEARCH SQUARE 2023:rs.3.rs-3161608. [PMID: 37503116 PMCID: PMC10371074 DOI: 10.21203/rs.3.rs-3161608/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
The mechanochemical GTPase dynamin-related protein 1 (Drp1) catalyzes mitochondrial fission, but the regulatory mechanisms remain ambiguous. Here we found that a conserved, intrinsically disordered, six-residue Short Linear Motif at the extreme Drp1 C-terminus, named CT-SLiM, constitutes a critical allosteric site that controls Drp1 structure and function in vitro and in vivo. Extension of the CT-SLiM by non-native residues, or its interaction with the protein partner GIPC-1, constrains Drp1 subunit conformational dynamics, alters self-assembly properties, and limits cooperative GTP hydrolysis, leading to the fission of model membranes in vitro. In vivo, the availability of the native CT-SLiM is a requirement for productive mitochondrial fission, as both non-native extension and deletion of the CT-SLiM severely impair its progression. Thus, contrary to prevailing models, Drp1-catalyzed mitochondrial fission relies on allosteric communication mediated by the CT-SLiM, deceleration of GTPase activity, and coupled changes in subunit architecture and assembly-disassembly dynamics.
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Affiliation(s)
- Isabel Pérez-Jover
- Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
- Instituto Biofisika, University of the Basque Country, 48940 Leioa, Spain
| | - Kristy Rochon
- Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Di Hu
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Pooja Madan Mohan
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Isaac Santos-Perez
- Electron Microscopy and Crystallography Center for Cooperative Research in Biosciences (CIC bioGUNE), Bizkaia Science and Technology Park Bld 800, 48160-Derio, Bizkaia, Spain
| | - Julene Ormaetxea Gisasola
- Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
- Instituto Biofisika, University of the Basque Country, 48940 Leioa, Spain
| | - Juan Manuel Martinez Galvez
- Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
- Instituto Biofisika, University of the Basque Country, 48940 Leioa, Spain
| | - Jon Agirre
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, YO10 5DD, York, UK
| | - Xin Qi
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Center for Mitochondrial Diseases, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Jason A. Mears
- Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Center for Mitochondrial Diseases, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Cleveland Center for Membrane and Structural Biology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Anna V. Shnyrova
- Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
- Instituto Biofisika, University of the Basque Country, 48940 Leioa, Spain
| | - Rajesh Ramachandran
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Cleveland Center for Membrane and Structural Biology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
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Martínez-Rosas V, Hernández-Ochoa B, Morales-Luna L, Ortega-Cuellar D, González-Valdez A, Arreguin-Espinosa R, Rufino-González Y, Calderón-Jaimes E, Castillo-Rodríguez RA, Wong-Baeza C, Baeza-Ramírez I, Pérez de la Cruz V, Vidal-Limón A, Gómez-Manzo S. Nitazoxanide Inhibits the Bifunctional Enzyme GlG6PD::6PGL of Giardia lamblia: Biochemical and In Silico Characterization of a New Druggable Target. Int J Mol Sci 2023; 24:11516. [PMID: 37511272 PMCID: PMC10380810 DOI: 10.3390/ijms241411516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/08/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
Giardiasis, which is caused by Giardia lamblia infection, is a relevant cause of morbidity and mortality worldwide. Because no vaccines are currently available to treat giardiasis, chemotherapeutic drugs are the main options for controlling infection. Evidence has shown that the nitro drug nitazoxanide (NTZ) is a commonly prescribed treatment for giardiasis; however, the mechanisms underlying NTZ's antigiardial activity are not well-understood. Herein, we identified the glucose-6-phosphate::6-phosphogluconate dehydrogenase (GlG6PD::6PGL) fused enzyme as a nitazoxanide target, as NTZ behaves as a GlG6PD::6PGL catalytic inhibitor. Furthermore, fluorescence assays suggest alterations in the stability of GlG6PD::6PGL protein, whereas the results indicate a loss of catalytic activity due to conformational and folding changes. Molecular docking and dynamic simulation studies suggest a model of NTZ binding on the active site of the G6PD domain and near the structural NADP+ binding site. The findings of this study provide a novel mechanistic basis and strategy for the antigiardial activity of the NTZ drug.
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Affiliation(s)
- Víctor Martínez-Rosas
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico
- Programa de Posgrado en Biomedicina y Biotecnología Molecular, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11340, Mexico
| | - Beatriz Hernández-Ochoa
- Laboratorio de Inmunoquímica, Hospital Infantil de México Federico Gómez, Secretaría de Salud, Mexico City 06720, Mexico
| | - Laura Morales-Luna
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Daniel Ortega-Cuellar
- Laboratorio de Nutrición Experimental, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico
| | - Abigail González-Valdez
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Roberto Arreguin-Espinosa
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Yadira Rufino-González
- Laboratorio de Parasitología Experimental, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico
| | - Ernesto Calderón-Jaimes
- Laboratorio de Inmunoquímica, Hospital Infantil de México Federico Gómez, Secretaría de Salud, Mexico City 06720, Mexico
| | | | - Carlos Wong-Baeza
- Laboratorio de Biomembranas, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11340, Mexico
| | - Isabel Baeza-Ramírez
- Laboratorio de Biomembranas, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11340, Mexico
| | - Verónica Pérez de la Cruz
- Neurobiochemistry and Behavior Laboratory, National Institute of Neurology and Neurosurgery "Manuel Velasco Suárez", Mexico City 14269, Mexico
| | - Abraham Vidal-Limón
- Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C. (INECOL), Carretera Antigua a Coatepec 351, El Haya, Xalapa 91073, Mexico
| | - Saúl Gómez-Manzo
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City 04530, Mexico
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Liu S, Xie Y, Li B, Li S, Yu W, Ye A, Guo Q. Structural Properties of Quinoa Protein Isolate: Impact of Neutral to High Alkaline Extraction pH. Foods 2023; 12:2589. [PMID: 37444327 DOI: 10.3390/foods12132589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
In this work, we extracted proteins from white quinoa cultivated in the northeast of Qinghai-Tibet plateau using the method of alkaline solubilization and acid precipitation, aiming to decipher how extraction pH (7-11) influenced extractability, purity and recovery rate, composition, multi-length scale structure, and gelling properties of quinoa protein isolate (QPI). The results showed that protein extractability increased from 39 to 58% with the increment of pH from 7 to 11 whereas protein purity decreased from 89 to 82%. At pH 7-11, extraction suspensions and QPI showed the similar major bands in SDS-PAGE with more minor ones (e.g., protein fractions at > 55 or 25-37 kDa) in suspensions. Extraction pH had limited effect on the secondary structure of QPI. In contrast, the higher-order structures of QPI were significantly affected, e.g., (1) emission maximum wavelength of intrinsic fluorescence increased with extraction pH; (2) surface hydrophobicity and the absolute value of zeta-potential increased with increasing extraction pH from 7 to 9, and then markedly decreased; (3) the particle size decreased to the lowest value at pH 9 and then increased to the highest value at pH 11; and (4) denaturation temperature of QPI had a large decrease with increasing extraction pH from 7/8 to 9/10. Besides, heat-set QPI gels were formed by loosely-connected protein aggregates, which were strengthened with increasing extraction pH. This study would provide fundamental data for industrial production of quinoa protein with desired quality.
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Affiliation(s)
- Shengnan Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- National Engineering Research Center for Fruit and Vegetable Processing, China Agricultural University, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
- Beijing Key Laboratory of Food Non-Thermal Processing, Beijing 100083, China
- Dongying Industrial Product Inspection & Metrology Verification Center, Dongying Administration for Market Regulation, Dongying 257091, China
| | - Yun Xie
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- National Engineering Research Center for Fruit and Vegetable Processing, China Agricultural University, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
- Beijing Key Laboratory of Food Non-Thermal Processing, Beijing 100083, China
| | - Bingyi Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- National Engineering Research Center for Fruit and Vegetable Processing, China Agricultural University, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
- Beijing Key Laboratory of Food Non-Thermal Processing, Beijing 100083, China
| | - Siqi Li
- Riddet Institute, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - Wenhua Yu
- Shandong Wonderful Biotech Co., Ltd., Dongying 257500, China
| | - Aiqian Ye
- Riddet Institute, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - Qing Guo
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- National Engineering Research Center for Fruit and Vegetable Processing, China Agricultural University, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
- Beijing Key Laboratory of Food Non-Thermal Processing, Beijing 100083, China
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Zhu W, Passalia FJ, Hamond C, Abe CM, Ko AI, Barbosa AS, Wunder EA. MPL36, a major plasminogen (PLG) receptor in pathogenic Leptospira, has an essential role during infection. PLoS Pathog 2023; 19:e1011313. [PMID: 37486929 PMCID: PMC10399853 DOI: 10.1371/journal.ppat.1011313] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 08/03/2023] [Accepted: 07/10/2023] [Indexed: 07/26/2023] Open
Abstract
Leptospirosis, a zoonosis with worldwide distribution, is caused by pathogenic spirochetes belonging to the genus Leptospira. Bacterial outer membrane proteins (OMPs), particularly those with surface-exposed regions, play crucial roles in pathogen dissemination and virulence mechanisms. Here we characterized the leptospiral Membrane Protein L36 (MPL36), a rare lipoprotein A (RlpA) homolog with a C-terminal Sporulation related (SPOR) domain, as an important virulence factor in pathogenic Leptospira. Our results confirmed that MPL36 is surface exposed and expressed during infection. Using recombinant MPL36 (rMPL36) we also confirmed previous findings of its high plasminogen (PLG)-binding ability determined by lysine residues of the C-terminal region of the protein, with ability to convert bound-PLG to active plasmin. Using Koch's molecular postulates, we determined that a mutant of mpl36 has a reduced PLG-binding ability, leading to a decreased capacity to adhere and translocate MDCK cell monolayers. Using recombinant protein and mutant strains, we determined that the MPL36-bound plasmin (PLA) can degrade fibrinogen. Finally, our mpl36 mutant had a significant attenuated phenotype in the hamster model for acute leptospirosis. Our data indicates that MPL36 is the major PLG binding protein in pathogenic Leptospira, and crucial to the pathogen's ability to attach and interact with host tissues during infection. The MPL36 characterization contributes to the expanding field of bacterial pathogens that explore PLG for their virulence, advancing the goal to close the knowledge gap regarding leptospiral pathogenesis while offering a novel potential candidate to improve diagnostic and prevention of this important zoonotic neglected disease.
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Affiliation(s)
- Weinan Zhu
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
| | - Felipe J. Passalia
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
- Laboratory of Vaccine Development, Instituto Butantan, São Paulo, Brazil
| | - Camila Hamond
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
| | - Cecília M. Abe
- Laboratory of Bacteriology, Instituto Butantan, São Paulo, Brazil
| | - Albert I. Ko
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation; Brazilian Ministry of Health; Salvador, Brazil
| | | | - Elsio A. Wunder
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, United States of America
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation; Brazilian Ministry of Health; Salvador, Brazil
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Han X, Sun Y, Huangfu B, He X, Huang K. Ultra-high-pressure passivation of soybean agglutinin and safety evaluations. Food Chem X 2023; 18:100726. [PMID: 37397201 PMCID: PMC10314156 DOI: 10.1016/j.fochx.2023.100726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/17/2023] [Accepted: 05/24/2023] [Indexed: 07/04/2023] Open
Abstract
Soybean agglutinin (SBA) is a heat-sensitive anti-nutritional factor (ANF). It affects nutrient absorption and causes organism poisoning. This study explored the SBA passivation ability and mechanism by ultra-high pressure (HHP), a non-thermal food processing technology. The results indicated that more than 500 MPa HHP treatment reduced the SBA activity by destroying its secondary and tertiary structures. Also, the cell and animal experiments showed that HHP treatment reduced the cytotoxicity of SBA, improved the mice's body weight, and alleviated liver, kidney, and digestive tract damage in Vivo. These results demonstrated that HHP had a high passivation efficiency against the SBA, thereby HHP promoting the safety of soybean products. This study provided supporting evidence for ultra-high-pressure treatment applications in soybean processing.
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Affiliation(s)
- Xiao Han
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yu Sun
- Lanzhou Anning District Bureau of Statistics, Gansu 730070, China
| | - Bingxin Huangfu
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiaoyun He
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), the Ministry of Agriculture and Rural Affairs of the P.R. China, Beijing, 100083, China
| | - Kunlun Huang
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), the Ministry of Agriculture and Rural Affairs of the P.R. China, Beijing, 100083, China
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Spiga L, Fansler RT, Perera YR, Shealy NG, Munneke MJ, Torres TP, David HE, Lemoff A, Ran X, Richardson KL, Pudlo N, Martens EC, Yang ZJ, Skaar EP, Byndloss MX, Chazin WJ, Zhu W. Iron acquisition by a commensal bacterium modifies host nutritional immunity during Salmonella infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.25.546471. [PMID: 37425782 PMCID: PMC10326984 DOI: 10.1101/2023.06.25.546471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
During intestinal inflammation, host nutritional immunity starves microbes of essential micronutrients such as iron. Pathogens scavenge iron using siderophores, which is counteracted by the host using lipocalin-2, a protein that sequesters iron-laden siderophores, including enterobactin. Although the host and pathogens compete for iron in the presence of gut commensal bacteria, the roles of commensals in nutritional immunity involving iron remain unexplored. Here, we report that the gut commensal Bacteroides thetaiotaomicron acquires iron in the inflamed gut by utilizing siderophores produced by other bacteria including Salmonella, via a secreted siderophore-binding lipoprotein termed XusB. Notably, XusB-bound siderophores are less accessible to host sequestration by lipocalin-2 but can be "re-acquired" by Salmonella , allowing the pathogen to evade nutritional immunity. As the host and pathogen have been the focus of studies of nutritional immunity, this work adds commensal iron metabolism as a previously unrecognized mechanism modulating the interactions between pathogen and host nutritional immunity.
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70
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Boumar I, Deliorman M, Sukumar P, Qasaimeh MA. Spike- and nucleocapsid-based gold colloid assay toward the development of an adhesive bandage for rapid SARS-CoV-2 immune response detection and screening. MICROSYSTEMS & NANOENGINEERING 2023; 9:82. [PMID: 37351273 PMCID: PMC10281977 DOI: 10.1038/s41378-023-00554-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 05/02/2023] [Accepted: 05/14/2023] [Indexed: 06/24/2023]
Abstract
Immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies are important biomarkers used for the diagnosis and screening of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections in both symptomatic and asymptomatic individuals. These antibodies are highly specific to the spike (S) and nucleocapsid (N) proteins of the SARS-CoV-2 virus. This paper outlines the development steps of a novel hybrid (vertical-lateral-vertical) flow assay in the form of a finger-stick point-of-care device, similar to an adhesive bandage, designed for the timely detection and screening of IgM and IgG immune responses to SARS-CoV-2 infections. The assay, comprising a vertically stacked plasma/serum separation membrane, conjugate pad, and detection (readout) zone, utilizes gold nanoparticles (AuNPs) conjugated with SARS-CoV-2 S and N proteins to effectively capture IgM and IgG antibodies from a pinprick (~15 µL) of blood in just one step and provides results of no immune IgM-/IgG-, early immune IgM+/IgG-, active immune IgM+/IgG+ or immune IgM-/IgG+ in a short amount of time (minutes). The adhesive bandage-like construction is an example of the design of rapid, low-cost, disposable, and easy-to-use tests for large-scale detection and screening in households. Furthermore, the bandage can be easily adjusted and optimized to detect different viral infections as they arise by simply selecting appropriate antigens related to pandemics and outbreaks.
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Affiliation(s)
- Imen Boumar
- Division of Engineering, New York University Abu Dhabi (NYUAD), Abu Dhabi, UAE
| | | | - Pavithra Sukumar
- Division of Engineering, New York University Abu Dhabi (NYUAD), Abu Dhabi, UAE
| | - Mohammad A. Qasaimeh
- Division of Engineering, New York University Abu Dhabi (NYUAD), Abu Dhabi, UAE
- NYU Tandon School of Engineering, New York University, New York, USA
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71
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Naderi Beni R, Hassani-Nejad Pirkouhi Z, Mehraban F, Seyedarabi A. A Novel Molecular Approach for Enhancing the Safety of Ozone in Autohemotherapy and Insights into Heme Pocket Autoxidation of Hemoglobin. ACS OMEGA 2023; 8:20714-20729. [PMID: 37332819 PMCID: PMC10269247 DOI: 10.1021/acsomega.3c01288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 05/04/2023] [Indexed: 06/20/2023]
Abstract
Major ozone autohemotherapy (MAH) is a popular clinical practice for treating a variety of pathological conditions due to the mild and controlled oxidative stress produced by the reaction of ozone gas with other biological components. Previous studies have shown that blood ozonation leads to structural changes in hemoglobin (Hb); therefore, in the present study, the molecular effects of ozonation on Hb of a healthy individual were assessed by ozonating whole blood samples with single doses of ozone at 40, 60, and 80 μg/mL or double doses of ozone at 20 + 20, 30 + 30, and 40 + 40 μg/mL ozone to investigate whether ozonating once versus twice (but with the same final ozone concentration) would have varying effects on Hb. Additionally, our study aimed to verify whether using a very high ozone concentration (80 + 80 μg/mL), despite mixing it with blood in two steps, would result in Hb autoxidation. The pH, oxygen partial pressure, and saturation percentage of the whole blood samples were measured through a venous blood gas test, and the purified Hb samples were analyzed using several techniques including intrinsic fluorescence, circular dichroism and UV-vis absorption spectroscopies, SDS-polyacrylamide gel electrophoresis, dynamic light scattering, and a zeta potential analyzer. Structural and sequence analyses were also used to study the Hb heme pocket autoxidation sites and the residues involved. The results showed that the oligomerization and instability of Hb can be reduced if the ozone concentration to be used in MAH is divided into two doses. Indeed, our study demonstrated that two-step ozonation with 20, 30, and 40 μg/mL of ozone instead of single-dose ozonation with 40, 60, and 80 μg/mL of ozone reduced the potential adverse effects of ozone on Hb including protein instability and oligomerization. Moreover, it was found that for certain residues, their orientation or displacement leads to the entry of excess water molecules into the heme moiety, which can contribute to Hb autoxidation. Additionally, the autoxidation rate was found to be higher in alpha globins compared to beta globins.
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72
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Hu J, Hu X, Zeng Z, Zhang J, Li M, Geng F, Wu D. Interaction between a photoisomerizable azobenzene compound and alpha-lactalbumin: Spectroscopic and computational simulation studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 301:122965. [PMID: 37327501 DOI: 10.1016/j.saa.2023.122965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/18/2023]
Abstract
The combination of light and photoresponsive compounds provides a peculiar way of regulating biological systems. Azobenzene is a classical organic compound with photoisomerization properties. Exploring the interactions between azobenzene and proteins can deepen the biochemical applications of the azobenzene compounds. In this paper, the interaction of 4-[(2,6-dimethylphenyl)diazenyl]-3,5-dimethylphenol with alpha-lactalbumin was investigated by UV-Vis absorption spectra, multiple fluorescence spectra, computer simulations, and circular dichroism spectra. Most critically, the interaction differences between proteins and the trans- and cis-isomer of ligands have been analyzed and compared. Results showed that both isomers of ligands were bound to alpha-lactalbumin to form ground state complexes and statically quenched the steady-state fluorescence of alpha-lactalbumin. The van der Waals forces and hydrogen bonding dominated the binding; the difference is that the binding of the cis-isomer to alpha-lactalbumin is more rapidly stabilized, and the binding strength is greater than the trans-isomer. These binding differences were modeled and analyzed by molecular docking and kinetic simulations, and we found that both isomers bind through the hydrophobic aromatic cluster 2 of alpha-lactalbumin. However, the bent structure of the cis-isomer is more closely aligned with the construction of the aromatic cluster and may have contributed to the above differences.
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Affiliation(s)
- Jie Hu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Xia Hu
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Zhen Zeng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Jing Zhang
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Mohan Li
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Fang Geng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Di Wu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China; Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China.
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73
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Glibitskiy D, Gorobchenko O, Nikolov O, Cheipesh T, Dzhimieva T, Zaitseva I, Roshal A, Semenov M, Glibitskiy G. Influence of aluminum and iron chlorides on the parameters of zigzag patterns on films dried from BSA solutions. Sci Rep 2023; 13:9426. [PMID: 37296212 DOI: 10.1038/s41598-023-36515-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 06/05/2023] [Indexed: 06/12/2023] Open
Abstract
The relationships between the structural and aggregational state of bovine serum albumin (BSA) and the specific length and total number of zigzag pattern segments of the film textures formed upon drying biopolymer solutions with aluminum and iron chlorides have been shown. To obtain films, saline solutions of BSA were dried in a glass cuvette under thermostatically controlled conditions. It is shown that the formation of zigzag structures is sensitive to the influence of aluminum chlorides Al3+ and iron chlorides Fe3+ and depend on the concentration of AlCl3 and FeCl3. This may be due to a change in the charge and size of BSA particles and due to a change in conformation or a violation of the structure of BSA. These factors, in turn, affect the hydration of the solution components and the structural state of free water in solution, which presumably also affects the formation of zigzag structures. It is established that the analysis of the specific length and the number of segments of zigzag patterns makes it possible to evaluate changes in the state of biopolymers in the initial solution during structural changes and aggregation.
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Affiliation(s)
- Dmitriy Glibitskiy
- O. Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura Str., Kharkiv, 61085, Ukraine.
| | - Olga Gorobchenko
- V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022, Ukraine
| | - Oleg Nikolov
- V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022, Ukraine
| | - Tatyana Cheipesh
- V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022, Ukraine
| | - Tatyana Dzhimieva
- V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022, Ukraine
| | - Inna Zaitseva
- V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022, Ukraine
- O. M. Beketov National University of Urban Economy in Kharkiv, 17 Marshal Bazhanov Str., Kharkiv, 61002, Ukraine
| | - Alexander Roshal
- Institute for Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022, Ukraine
| | - Mihail Semenov
- O. Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura Str., Kharkiv, 61085, Ukraine
| | - Gennadiy Glibitskiy
- O. Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura Str., Kharkiv, 61085, Ukraine
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74
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Abou El-Nour KM, El-Sherbiny IM, Khairy GM, Abbas AM, Salem EH. Investigation of thymine as a potential cancer biomarker employing tryptophan with nanomaterials as a biosensor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 301:122928. [PMID: 37311362 DOI: 10.1016/j.saa.2023.122928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 05/02/2023] [Accepted: 05/26/2023] [Indexed: 06/15/2023]
Abstract
Tryptophan and tryptophan-based nanomaterials sensors in a solution have been developed to directly evaluate thymine. The determination of thymine has been done via quenching of the fluorescence of tryptophan and tryptophan-based nanomaterials such as graphene (Gr), graphene oxide (GO), gold nanoparticles (AuNPs), gold-silver nanocomposite (Au-Ag NC) in a physiological buffer. As the concentration of thymine rises, the fluorescence of tryptophan and tryptophan/nanomaterials becomes less intense. Trp, Trp/Gr, and tryptophan/(Au-Ag) NC systems' quenching mechanisms were dynamic, but tryptophan /GO and tryptophan/AuNPs' quenching mechanisms were static. The linear dynamic range for the determination of thy by tryptophan and tryptophan /nanomaterials is 10 to 200 μM. The detection limits for tryptophan, tryptophan /Gr, tryptophan /GO, tryptophan /AuNPs, and tryptophan/Au-Ag NC were 3.21, 14.20, 6.35, 4.67and 7.79 Μm, respectively. Thermodynamic parameters for the interaction of the Probes with Thy include the enthalpy (H°) and entropy (S°) change values, were assessed, as well as the binding constant (Ka) of Thy with Trp and Trp-based nanomaterials. A recovery study was conducted utilizing a human serum sample after the addition of the required quantity of the investigational thymine.
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Affiliation(s)
- Kholoud M Abou El-Nour
- Department of Chemistry, Suez Canal University, Faculty of Science, Ismailia 41522, Egypt.
| | - Ibrahim M El-Sherbiny
- Nanomedicine Research Labs, Center for Materials Sciences, Zewail City of Science and Technology, 6(th) October City, 12578 Giza, Egypt
| | - Gasser M Khairy
- Department of Chemistry, Suez Canal University, Faculty of Science, Ismailia 41522, Egypt
| | - Abbas M Abbas
- Department of Chemistry, Suez Canal University, Faculty of Science, Ismailia 41522, Egypt
| | - Eman H Salem
- Department of Chemistry, Suez Canal University, Faculty of Science, Ismailia 41522, Egypt
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75
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Nieddu M, Patrian M, Ferrara S, Fuenzalida Werner JP, Kohler F, Anaya-Plaza E, Kostiainen MA, Dietz H, Berenguer JR, Costa RD. Core-Shell Structured Fluorescent Protein Nanoparticles: New Paradigm Toward Zero-Thermal-Quenching in High-Power Biohybrid Light-Emitting Diodes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2300069. [PMID: 37013464 DOI: 10.1002/advs.202300069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/26/2023] [Indexed: 06/04/2023]
Abstract
Stable and efficient high-power biohybrid light-emitting diodes (Bio-HLEDs) using fluorescent proteins (FPs) in photon downconverting filters have not been achieved yet, reaching best efficiencies of 130 lm W-1 stable for >5 h. This is related to the rise of the device temperature (70-80 °C) caused by FP-motion and quick heat-transmission in water-based filters, they lead to a strong thermal emission quenching followed by the quick chromophore deactivation via photoinduced H-transfer. To tackle both issues at once, this work shows an elegant concept of a new FP-based nanoparticle, in which the FP core is shielded by a SiO2 -shell (FP@SiO2 ) with no loss of the photoluminescence figures-of-merit over years in foreign environments: dry powder at 25 °C (ambient) or constant 50 °C, as well as suspensions in organic solvents. This enables the preparation of water-free photon downconverting coatings with FP@SiO2 , realizing on-chip high-power Bio-HLEDs with 100 lm W-1 stable for >120 h. Both thermal emission quenching and H-transfer deactivation are suppressed, since the device temperature holds <40 °C and remote high-power Bio-HLEDs exhibit final stabilities of 130 days compared to reference devices with water-based FP@SiO2 (83 days) and FP-polymer coatings (>100 h). Hence, FP@SiO2 is a new paradigm toward water-free zero-thermal-quenching biophosphors for first-class high-power Bio-HLEDs.
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Affiliation(s)
- Mattia Nieddu
- Chair of Biogenic Functional Materials, Technical University of Munich, Schulgasse, 22, 94315, Straubing, Germany
| | - Marta Patrian
- Chair of Biogenic Functional Materials, Technical University of Munich, Schulgasse, 22, 94315, Straubing, Germany
| | - Sara Ferrara
- Chair of Biogenic Functional Materials, Technical University of Munich, Schulgasse, 22, 94315, Straubing, Germany
| | - Juan Pablo Fuenzalida Werner
- Chair of Biogenic Functional Materials, Technical University of Munich, Schulgasse, 22, 94315, Straubing, Germany
| | - Fabian Kohler
- Laboratory for Biomolecular Nanotechnology, Department of Physics, Technical University of Munich, Am Coulombwall 4a, 85748, Garching, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 5748, Garching, Germany
| | - Eduardo Anaya-Plaza
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, 02150, Finland
| | - Mauri A Kostiainen
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, 02150, Finland
| | - Hendrik Dietz
- Laboratory for Biomolecular Nanotechnology, Department of Physics, Technical University of Munich, Am Coulombwall 4a, 85748, Garching, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 5748, Garching, Germany
| | - Jesús Rubén Berenguer
- Departamento de Química-Centro de Investigación en Síntesis Química (CISQ), Universidad de La Rioja, Madre de Dios 53, Logroño, E-26006, Spain
| | - Rubén D Costa
- Chair of Biogenic Functional Materials, Technical University of Munich, Schulgasse, 22, 94315, Straubing, Germany
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76
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Llowarch P, Usselmann L, Ivanov D, Holdgate GA. Thermal unfolding methods in drug discovery. BIOPHYSICS REVIEWS 2023; 4:021305. [PMID: 38510342 PMCID: PMC10903397 DOI: 10.1063/5.0144141] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 04/13/2023] [Indexed: 03/22/2024]
Abstract
Thermal unfolding methods, applied in both isolated protein and cell-based settings, are increasingly used to identify and characterize hits during early drug discovery. Technical developments over recent years have facilitated their application in high-throughput approaches, and they now are used more frequently for primary screening. Widespread access to instrumentation and automation, the ability to miniaturize, as well as the capability and capacity to generate the appropriate scale and quality of protein and cell reagents have all played a part in these advances. As the nature of drug targets and approaches to their modulation have evolved, these methods have broadened our ability to provide useful chemical start points. Target proteins without catalytic function, or those that may be difficult to express and purify, are amenable to these methods. Here, we provide a review of the applications of thermal unfolding methods applied in hit finding during early drug discovery.
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Affiliation(s)
- Poppy Llowarch
- High Throughput Screening, Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Alderley Park, United Kingdom
| | - Laura Usselmann
- High Throughput Screening, Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Alderley Park, United Kingdom
| | - Delyan Ivanov
- High Throughput Screening, Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Alderley Park, United Kingdom
| | - Geoffrey A. Holdgate
- High Throughput Screening, Hit Discovery, Discovery Sciences, R&D, AstraZeneca, Alderley Park, United Kingdom
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77
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Rodríguez-Núñez K, López-Gallego F, Martínez R, Bernal C. Immobilized biocatalyst engineering: Biocatalytic tool to obtain attractive enzymes for industry. Int J Biol Macromol 2023; 242:125075. [PMID: 37230450 DOI: 10.1016/j.ijbiomac.2023.125075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/11/2023] [Accepted: 05/22/2023] [Indexed: 05/27/2023]
Abstract
Biocatalysis can improve current bioprocesses by identifying or improving enzymes that withstand harsh and unnatural operating conditions. Immobilized Biocatalyst Engineering (IBE) is a novel strategy integrating protein engineering and enzyme immobilization as a single workflow. Using IBE, it is possible to obtain immobilized biocatalysts whose soluble performance would not be selected. In this work, Bacillus subtilis lipase A (BSLA) variants obtained through IBE were characterized as soluble and immobilized biocatalysts, and how the interactions with the support affect their structure and catalytic performance were analyzed using intrinsic protein fluorescence. Variant P5G3 (Asn89Asp, Gln121Arg) showed a 2.6-fold increased residual activity after incubation at 76 °C compared to immobilized wild-type (wt) BSLA. On the other hand, variant P6C2 (Val149Ile) showed 4.4 times higher activity after incubation in 75 % isopropyl alcohol (36 °C) compared to Wt_BSLA. Furthermore, we studied the advancement of the IBE platform by performing synthesis and immobilizing the BSLA variants using a cell-free protein synthesis (CFPS) approach. The observed differences in immobilization performance, high temperature, and solvent resistance between the in vivo-produced variants and Wt_BSLA were confirmed for the in vitro synthesized enzymes. These results open the door for designing strategies integrating IBE and CFPS to generate and screen improved immobilized enzymes from genetic diversity libraries. Furthermore, it was confirmed that IBE is a platform that can be used to obtain improved biocatalysts, especially those with an unremarkable performance as soluble biocatalysts, which wouldn't be selected for immobilization and further development for specific applications.
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Affiliation(s)
- Karen Rodríguez-Núñez
- Laboratorio de Tecnología de Enzimas para Bioprocesos, Departamento de Ingeniería en Alimentos, Universidad de La Serena, Av. Raúl Bitrán 1305, 1720010 La Serena, Chile.
| | - Fernando López-Gallego
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE) - Basque Research and Technology Alliance (BRTA) Paséo Miramón, 194, Donostia-San Sebastián 20014, Spain; KERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, Bilbao, 48013, Spain
| | - Ronny Martínez
- Laboratorio de Tecnología de Enzimas para Bioprocesos, Departamento de Ingeniería en Alimentos, Universidad de La Serena, Av. Raúl Bitrán 1305, 1720010 La Serena, Chile
| | - Claudia Bernal
- Laboratorio de Tecnología de Enzimas para Bioprocesos, Departamento de Ingeniería en Alimentos, Universidad de La Serena, Av. Raúl Bitrán 1305, 1720010 La Serena, Chile; Departamento de Química, Universidad de La Serena, Benavente 980, 1720010 La Serena, Chile
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78
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Farid NA, Youssef NF, Abdellatef HE, Sharaf YA. Spectrofluorimetric methods for the determination of mirabegron by quenching tyrosine and L-tryptophan fluorophores: Recognition of quenching mechanism by stern volmer relationship, evaluation of binding constants and binding sites. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122473. [PMID: 36801734 DOI: 10.1016/j.saa.2023.122473] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 02/03/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Green spectrofluorimetric methods have been adopted for the determination of Mirabegron (MG) in pure drug and pharmaceutical dosage form. The developed methods based on fluorescence quenching of tyrosine and L-tryptophan amino acids fluorophores by the effect of Mirabegron as a quencher. Experimental conditions of the reaction were studied and optimized. The Fluorescence quenching (ΔF) values were proportional to the concentration range of MG 2-20 μg/ml for the tyrosine-MG system in buffered media pH 2 and 1-30 μg/ml for L-tryptophan-MG system pH 6. Good correlation coefficients with low detection limits of 0.163 and 0.234 μg/ml for the two systems respectively. Method validation was applied according to ICH guidelines. The cited methods were successively applied for MG determination in tablet formulation. No statistically significant difference between the results of the cited and the reference methods regarding t and F tests. The proposed spectrofluorimetric methods are simple, rapid, eco-friendly and can contribute to MG's methodologies in quality control labs. Stern-Volmer relationship, the effect of temperature, quenching constant (Kq), and UV spectra were studied to identify the mechanism by which the quenching might occur. The results demonstrated that fluorescence quenching of tyrosine was a dynamic quenching process and L-tryptophan was static. The double log plots were constructed to determine the binding constants and binding sites. The greenness profile of the developed methods has been assessed by Green Analytical procedure index (GAPI) and Analytical Greenness Metric Approach (AGREE).
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Affiliation(s)
- Naira A Farid
- Pharmaceutical Chemistry Department, National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Nadia F Youssef
- Pharmaceutical Chemistry Department, National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Hisham E Abdellatef
- Analytical Chemistry Department, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Yasmine A Sharaf
- Analytical Chemistry Department, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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79
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Li Y, Li X, Cui Z, He F, Zong W, Liu R. Probing the toxic effect of quinoline to catalase and superoxide dismutase by multispectral method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122449. [PMID: 36753919 DOI: 10.1016/j.saa.2023.122449] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Quinoline is a common nitrogen heterocyclic aromatic hydrocarbon with high water solubility. Studies have shown that quinoline can be teratogenic, carcinogenic and mutagenic. And Hepatocytes are the target cell of quinoline, which contain a large number of mitochondria and are related to cell function and the balance of reactive oxygen species (ROS). However, the research on the effect of quinoline on hepatocyte damage and anti-oxidation system is still unclear. Through the means of multispectral experiments, it is concluded that quinoline can affect the catalase (CAT) and superoxide dismutase (SOD), change their structure and affect their activity. The binding mode and binding site of quinoline to CAT/SOD were analyzed by isothermal calorimetric titration (ITC) and Molecular Operating Environment (MOE). In molecular docking simulation, the binding site of quinoline-CAT system is close to the active site, and affect the microenvironment of Tyr 357. This may be the reason why quinoline affects CAT activity and synchronous fluorescence (Δλ = 15 nm). This study demonstrated that quinoline has a great effect on CAT, which may affect the intracellular ROS balance and become a potential way to cause hepatocyte damage.
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Affiliation(s)
- Yuze Li
- School of Environmental Science and Engineering, China - America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Xiangxiang Li
- School of Environmental Science and Engineering, China - America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Zhihan Cui
- School of Environmental Science and Engineering, China - America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Falin He
- School of Environmental Science and Engineering, China - America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Wansong Zong
- College of Geography and Environment, Shandong Normal University, 88# East Wenhua Road, Jinan, Shandong 250014, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, China - America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China.
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80
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Ji X, Wang L, Zhao J, Jiang J. Possible role of polypeptide-chlorogenic acid interaction in the physicochemical and sensory characteristics of quinoa-modified coffee beverage. Food Chem 2023; 425:136359. [PMID: 37244236 DOI: 10.1016/j.foodchem.2023.136359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 04/26/2023] [Accepted: 05/08/2023] [Indexed: 05/29/2023]
Abstract
The effect of quinoa protein hydrolysate (QPH) beverage on the physicochemical and sensory characteristics of coffee was investigated. The scores of sensory properties of coffee-quinoa beverage revealed that the unpleasant sensory characteristics, such as extreme bitterness and astringency, were covered up by the addition of quinoa beverage; while smooth mouthfeel and sweetness were enhanced. On the other hand, the introduction of coffee into quinoa beverage significantly retarded oxidation characterized by TBARS. When treated with chlorogenic acid (CGA), significant structural changes and improved functionalities of QPH were detected. CGA induced the unfolding structure of QPH and decreased surface hydrophobicity. The interaction between QPH and CGA was shown by the changes of sulfydryl content and the pattern of SDS-PAGE. Besides, neutral protease treatment increased the equilibrium oil-water interfacial pressure value of QPH, revealing improved stability of emulsions. Synergistic antioxidant effect between QPH and CGA was revealed by increased ABTS+· scavenging rate.
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Affiliation(s)
- Xin Ji
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Li Wang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Jing Zhao
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92128, United States.
| | - Jiang Jiang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
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81
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He Z, Huang J, Shen W, Lei X, Zhang Y, Zhu L, Shen X, Zhang D, Yu D, Zhou M. A Paper-Based Fluorescent Sensor for Rapid Early Screening of Oral Squamous Cell Carcinoma. ACS APPLIED MATERIALS & INTERFACES 2023; 15:24913-24922. [PMID: 37163749 DOI: 10.1021/acsami.3c03545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Various types of sensors play an irreplaceable role in the detection of biomarkers, but their high cost and complicated operation make it difficult to benefit ordinary people. Herein, we develop a low-cost, double-layered, paper-based fluorescent sensor (CP/HQ) structurally consisting of the upper reaction layer loaded with two oxidases (lactate oxidase and choline oxidase) and the bottom fluorescent layer that physically associates with the porphine-grafted composite fluorescent polymer colloids (PF-PDMTP/HQ). Based on the dramatic and rapid fluorescence decrease of porphine induced by the oxidation between saliva and oxidases and subsequent fluorescence resonance energy transfer from oxidized hydroquinone, the resultant fluorescent paper sensor enables us to achieve visual detection of OSCC, which was further recognized by smartphone scanning as the grayscale variation. It was found that the linear sensing range of grayscale value are 10-200 μM for lactic acid and 10-100 μM for choline, with LODs of 5.7 and 8.9 μM, respectively. More importantly, the sensor can achieve a powerful detection capability comparable to that of high-performance liquid chromatography (HPLC) in clinical settings with simple operation, demonstrating its great application potential. Our proposed sensor not only improves the accuracy of OSCC diagnosis but also provides a valuable attempt for the device modification of polymer-sensing systems and the development of non-invasive and easy-to-operate disease screening methods.
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Affiliation(s)
- Zejian He
- College of Materials Science and Engineering, Zhejiang University of Technology, Zhejiang 310014, P. R. China
| | - Jianyao Huang
- Department of Stomatology Surgery, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang 322000, P. R. China
| | - Wenyi Shen
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang 310003, P. R. China
| | - Xiaoyue Lei
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang 310003, P. R. China
| | - Yifan Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Zhejiang 310014, P. R. China
| | - Liangliang Zhu
- College of Materials Science and Engineering, Zhejiang University of Technology, Zhejiang 310014, P. R. China
| | - Xinyi Shen
- College of Materials Science and Engineering, Zhejiang University of Technology, Zhejiang 310014, P. R. China
| | - Dong Zhang
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - Dan Yu
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang 310003, P. R. China
| | - Mi Zhou
- College of Materials Science and Engineering, Zhejiang University of Technology, Zhejiang 310014, P. R. China
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82
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Kralles ZT, Werner CA, Dai N. Overlooked Contribution of the Indole Moiety to the Formation of Haloacetonitrile Disinfection Byproducts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7074-7085. [PMID: 37079884 DOI: 10.1021/acs.est.3c01080] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Haloacetonitriles (HANs) are a group of disinfection byproducts with high toxicity and frequent occurrence. Past studies have focused on the free amine groups, especially those in amino acids, as HAN precursors. This study reports, for the first time, that the indole moiety such as that in the tryptophan side chain is also a potent precursor for the most common HANs dichloroacetonitrile, bromochloroacetonitrile, and dibromoacetonitrile. 3-Indolepropionic acid, differing from tryptophan only in the absence of the free amine group, formed HANs at levels 57-76% of those by tryptophan at a halogen/nitrogen molar ratio of 10. Experiments with tryptophan-(amino-15N) showed that the indole contributed to 28-51% of the HANs formed by tryptophan. At low oxidant excess (e.g., halogen/precursor = 5), 3-indolepropionic acid even formed more HANs than Trp by 3.5-, 2.5-, and 1.8-fold during free chlorination, free bromination, and chlorination in the presence of bromide (0.6 mg/L), respectively. Indole's HAN formation pathway was investigated by exploring the chlorination/bromination products of 3-indolepropionic acid using liquid chromatography-orbitrap high-resolution mass spectrometry. A total of 22 intermediates were detected, including pyrrole ring-opening products with an N-formyl group, 2-substituted anilines with different hydroxyl/halogen substitutions, and an intermediate with a postulated non-aromatic ring structure.
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Affiliation(s)
- Zachary T Kralles
- Department of Civil, Structural and Environmental Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Christian A Werner
- Department of Civil, Structural and Environmental Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Ning Dai
- Department of Civil, Structural and Environmental Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
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83
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Wang H, Mu W, Wang S, Liu Y, Ran B, Shi L, Ma T, Lu Y. Simultaneous fluorescence sensing of vitamin B2 and sulfur ions based on fluorescent copper nanoparticles. Talanta 2023; 256:124267. [PMID: 36657240 DOI: 10.1016/j.talanta.2023.124267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 01/08/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023]
Abstract
In this study, the F-CuNPs were synthesized by a modified liquid-phase chemical reduction method. Throughout the preparation process, anhydrous copper sulfate was used as the copper source, and ascorbic acid in the NaOH solution served as the reducing and protective agent. Förster resonance energy transfer (FRET) may exist between F-CuNPs and vitamin B2 due to the large spectral overlap between the fluorescence emission spectra of F-CuNPs and the UV-vis absorption spectra of vitamin B2. Therefore, the detection of vitamin B2 was designed based on a FRET system between F-CuNPs and vitamin B2. With S2- into the F-CuNPs&VB2 system, the fluorescence intensity of vitamin B2 was quenched, while the fluorescence intensity of F-CuNPs was almost unchanged. There may be a specific reaction between S2- and vitamin B2. Therefore, the research system can be further used to detect S2- based on ratiometric fluorescent probe. The research findings show that the linear range of vitamin B2 was 0.51 nM-34.64 nM with a detection limit of 0.25 nM (S/N = 3), the linear range of S2- was 0.64 μM-60.00 μM with a detection limit of 0.32 μM (S/N = 3). Furthermore, the simultaneous fluorescent sensing system has high sensitivity and selectivity. Therefore, this system was designed and successfully used to detect the content of vitamin B2 and S2- in actual samples to find a new effective method to detect analytes.
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Affiliation(s)
- Huan Wang
- Phytochemistry Key Laboratory of Tibetan Plateau of Qinghai Province, College of Pharmacy, Qinghai Nationalities University, Xining, 810007, China.
| | - Wencheng Mu
- Phytochemistry Key Laboratory of Tibetan Plateau of Qinghai Province, College of Pharmacy, Qinghai Nationalities University, Xining, 810007, China
| | - Siying Wang
- 96602 Military Hospital of Chinese People's Liberation Army, Kunming, 650000, China
| | - Yuanyuan Liu
- Yinchuan Center for Disease Control and Prevention, Yinchuan, 750004, China
| | - Baocheng Ran
- Phytochemistry Key Laboratory of Tibetan Plateau of Qinghai Province, College of Pharmacy, Qinghai Nationalities University, Xining, 810007, China
| | - Lin Shi
- Phytochemistry Key Laboratory of Tibetan Plateau of Qinghai Province, College of Pharmacy, Qinghai Nationalities University, Xining, 810007, China
| | - Tianfeng Ma
- Phytochemistry Key Laboratory of Tibetan Plateau of Qinghai Province, College of Pharmacy, Qinghai Nationalities University, Xining, 810007, China
| | - Yongchang Lu
- Phytochemistry Key Laboratory of Tibetan Plateau of Qinghai Province, College of Pharmacy, Qinghai Nationalities University, Xining, 810007, China
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84
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Dehghan Niestanak V, Unsworth LD. Detailing Protein-Bound Uremic Toxin Interaction Mechanisms with Human Serum Albumin in the Pursuit of Designing Competitive Binders. Int J Mol Sci 2023; 24:ijms24087452. [PMID: 37108613 PMCID: PMC10139063 DOI: 10.3390/ijms24087452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/12/2023] [Accepted: 04/15/2023] [Indexed: 04/29/2023] Open
Abstract
Chronic kidney disease is the gradual progression of kidney dysfunction and involves numerous co-morbidities, one of the leading causes of mortality. One of the primary complications of kidney dysfunction is the accumulation of toxins in the bloodstream, particularly protein-bound uremic toxins (PBUTs), which have a high affinity for plasma proteins. The buildup of PBUTs in the blood reduces the effectiveness of conventional treatments, such as hemodialysis. Moreover, PBUTs can bind to blood plasma proteins, such as human serum albumin, alter their conformational structure, block binding sites for other valuable endogenous or exogenous substances, and exacerbate the co-existing medical conditions associated with kidney disease. The inadequacy of hemodialysis in clearing PBUTs underscores the significance of researching the binding mechanisms of these toxins with blood proteins, with a critical analysis of the methods used to obtain this information. Here, we gathered the available data on the binding of indoxyl sulfate, p-cresyl sulfate, indole 3-acetic acid, hippuric acid, 3-carboxyl-4-methyl-5-propyl-2-furan propanoic acid, and phenylacetic acid to human serum albumin and reviewed the common techniques used to investigate the thermodynamics and structure of the PBUT-albumin interaction. These findings can be critical in investigating molecules that can displace toxins on HSA and improve their clearance by standard dialysis or designing adsorbents with greater affinity for PBUTs than HSA.
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Affiliation(s)
- Vida Dehghan Niestanak
- Department of Biomedical Engineering, University of Alberta, Edmonton, AB T6G 2G4, Canada
| | - Larry D Unsworth
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
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85
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Hernández-Ortiz OJ, Castro-Monter D, Rodríguez Lugo V, Moggio I, Arias E, Reyes-Valderrama MI, Veloz-Rodríguez MA, Vázquez-García RA. Synthesis and Study of the Optical Properties of a Conjugated Polymer with Configurational Isomerism for Optoelectronics. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2908. [PMID: 37049202 PMCID: PMC10096395 DOI: 10.3390/ma16072908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/22/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
A π-conjugated polymer (PBQT) containing bis-(2-ethylhexyloxy)-benzo [1,2-b'] bithiophene (BDT) units alternated with a quinoline-vinylene trimer was obtained by the Stille reaction. The chemical structure of the polymer was verified by nuclear magnetic resonance (1H NMR), Fourier transform infrared (FT-IR), and mass spectroscopy (MALDI-TOF). The intrinsic photophysical properties of the solution were evaluated by absorption and (static and dynamic) fluorescence. The polymer PBQT exhibits photochromism with a change in absorption from blue (449 nm) to burgundy (545 nm) and a change in fluorescence emission from green (513 nm) to orange (605 nm) due to conformational photoisomerization from the trans to the cis isomer, which was supported by theoretical calculations DFT and TD-DFT. This optical response can be used in optical sensors, security elements, or optical switches. Furthermore, the polymer forms spin-coated films with absorption properties that cover the entire visible range, with a maximum near the solar emission maximum. The frontier molecular orbitals, HOMO and LUMO, were calculated by cyclic voltammetry, and values of -5.29 eV and -3.69, respectively, and a bandgap of 1.6 eV were obtained, making this material a semiconductor with a good energetic match. These properties could suggest its use in photovoltaic applications.
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Affiliation(s)
- Oscar Javier Hernández-Ortiz
- Área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, Ciudad del Conocimiento, Mineral de la Reforma 42184, Hidalgo, Mexico
- Laboratorio de Química Supramolecular y Nanociencias de la Unidad Profesional Interdisciplinaria de Biotecnología del Instituto Politécnico Nacional, Av. Acueducto s/n Barrio la Laguna Ticomán, Ciudad de México 07340, Ciudad de México, Mexico
| | - Damaris Castro-Monter
- Área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, Ciudad del Conocimiento, Mineral de la Reforma 42184, Hidalgo, Mexico
| | - Ventura Rodríguez Lugo
- Área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, Ciudad del Conocimiento, Mineral de la Reforma 42184, Hidalgo, Mexico
| | - Ivana Moggio
- Centro de Investigación en Química Aplicada, Enrique Reyna H. 140, San José de los Cerritos, Saltillo 25294, Coahuila, Mexico
| | - Eduardo Arias
- Centro de Investigación en Química Aplicada, Enrique Reyna H. 140, San José de los Cerritos, Saltillo 25294, Coahuila, Mexico
| | - María Isabel Reyes-Valderrama
- Área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, Ciudad del Conocimiento, Mineral de la Reforma 42184, Hidalgo, Mexico
| | - María Aurora Veloz-Rodríguez
- Área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, Ciudad del Conocimiento, Mineral de la Reforma 42184, Hidalgo, Mexico
| | - Rosa Angeles Vázquez-García
- Área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, Ciudad del Conocimiento, Mineral de la Reforma 42184, Hidalgo, Mexico
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86
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Thi Dieu Truong H, Reddy P, Reis MM, Archer R. Internal reflectance cell fluorescence measurement combined with multi-way analysis to detect fluorescence signatures of undiluted honeys and a fusion of fluorescence and NIR to enhance predictability. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 290:122274. [PMID: 36580751 DOI: 10.1016/j.saa.2022.122274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/30/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Honey is a complex food matrix that contains diverse polyphenolic compounds. Some phenolics exhibit fluorescence signatures which can be used to evaluate honey quality, and authenticity and to determine botanical origin. Mānuka honey contains two unique fluorescence markers: Leptosperin (MM1) and LepteridineTM (MM2) that are derived from Leptospermum scoparium nectar. Fluorescence measurement of supersaturated solutions such as undiluted honeys can be challenged by complex inner filter effects. The current study shows the ability of internal reflectance cell fluorescence measurement and multi-way analysis to detect fluorophores in undiluted honeys. This study scanned honeys from different geographic districts generating excitation emission matrices (250-400/300-600 nm), and by near infrared (NIR) hyperspectral camera (547-1701 nm). PARAFAC and tri-PLS could track two fluorescence markers: MM1 (R2 = 0.82 & RMSEP = 138.65) and MM2 (R2 = 0.82 & RMSEP = 2.75) from undiluted honey fluorescence data with > 80 % accuracy. Classification of mono-floral, multi-floral and non-mānuka honeys achieved 90 % overall accuracy. Fusion of fluorescence data at ƛex 270 & 330 nm and NIR hyperspectral data combined with multi-block PLS analysis enhances predictability of fluorescence markers further. The study revealed the potential of internal reflectance cell fluorescence measurement combined with chemometrics and data fusion for rapid evaluation of honey quality and botanical origin.
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Affiliation(s)
- Hien Thi Dieu Truong
- School of Food and Advanced Technology, Massey University, Riddet Road, Fitzherbert, Palmerston North 4410, New Zealand.
| | - Pullanagari Reddy
- School of Food and Advanced Technology, Massey University, Riddet Road, Fitzherbert, Palmerston North 4410, New Zealand
| | - Marlon M Reis
- Food Informatics, AgResearch, Riddet Road, Massey University Manawatu Tennent Drive, Turitea 4474, New Zealand
| | - Richard Archer
- School of Food and Advanced Technology, Massey University, Riddet Road, Fitzherbert, Palmerston North 4410, New Zealand; Riddet Institute, University Avenue, Fitzherbert, Palmerston North 4474, New Zealand
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87
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Structural characterization, interfacial and emulsifying properties of soy protein hydrolysate-tannic acid complexes. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2022.108415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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88
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Dyrda-Terniuk T, Pryshchepa O, Rafińska K, Kolankowski M, Gołębiowski A, Gloc M, Dobrucka R, Kurzydłowski K, Pomastowski P. Immobilization Of Silver Ions Onto Casein. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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89
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Roy A, De SK, Dey S, Bhattacharya M, Satpati B, Senapati D. Resultant inward imbalanced seeding force (RIISF)-induced concave gold nanostar (CAuNS) for non-enzymatic electrocatalytic detection of serotonin and Kynurenine in human serum. Anal Chim Acta 2023; 1248:340908. [PMID: 36813459 DOI: 10.1016/j.aca.2023.340908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/29/2023] [Indexed: 02/04/2023]
Abstract
CTAC-based gold nanoseed-induced concave curvature evolution of surface boundary planes from concave gold nanocube (CAuNC) to concave gold nanostar (CAuNS) has been achieved by a novel synthetic methodology simply by controlling the extent of seed used and hence the generated 'Resultant Inward Imbalanced Seeding Force (RIISF)'. The resultant CAuNS shows an excellent enhancement in catalytic activity compared to CAuNC and other intermediates as a function of curvature-induced anisotropy. Detailed characterization evaluates the presence of an enhanced number of multiple defect sites, high energy facets, larger surface area, and roughened surface which ultimately results in an increased mechanical strain, coordinately unsaturation, and multifacet-oriented anisotropic behavior suitable for positive influence on the binding affinity of CAuNSs. While different crystalline and structural parameters improve their catalytic activity, the resultant uniform three-dimensional (3D) platform shows comparatively easy pliability and well absorptivity on the glassy carbon electrode surface for increased shelf life, a uniform structure to confine a large extent of stoichiometric systems, and long-term stability under ambient conditions for making this newly developed material a unique nonenzymatic scalable universal electrocatalytic platform. With the help of various electrochemical measurements, the ability of the platform has been established by performing highly specific and sensitive detection of the two most important human bio messengers: Serotonin (STN) and Kynurenine (KYN) which are metabolites of L-Tryptophan in the human body system. The present study mechanistically surveys the role of seed-induced RIISF-modulated anisotropy in controlling the catalytic activity which offers a universal 3D electrocatalytic sensing tenet by an electrocatalytic approach.
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Affiliation(s)
- Anuradha Roy
- Chemical Sciences Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata, 700064, India
| | - Sandip Kumar De
- Chemical Sciences Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata, 700064, India
| | - Suman Dey
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata, 700064, India
| | - Maireyee Bhattacharya
- Chemical Sciences Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata, 700064, India
| | - Biswarup Satpati
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata, 700064, India
| | - Dulal Senapati
- Chemical Sciences Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata, 700064, India.
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90
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Wani MJ, Salman KA, Hashmi MA, Siddiqui S, Moin S. Rutin impedes human low-density lipoprotein from non-enzymatic glycation: A mechanistic insight against diabetes-related disorders. Int J Biol Macromol 2023; 238:124151. [PMID: 36963546 DOI: 10.1016/j.ijbiomac.2023.124151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/09/2023] [Accepted: 03/20/2023] [Indexed: 03/26/2023]
Abstract
Glycation of human low-density protein (LDL) has an essential contribution to cardiovascular diseases. Natural compounds like rutin have been extensively studied in preventing glycation-induced oxidative stress. This study examined rutin's anti-glycation potential with glycated LDL utilizing spectroscopic and in silico methods. Glycated LDL treated with rutin, showed around 80 % inhibition in advanced glycation end-product production. Carbonyl content and lipid peroxidation like assays were used to establish the development of oxidative stress. Rutin was seen to lower the generation of oxidative stress in a dose-dependent manner. Using thioflavin t-test and electron microscopy, rutin was suggested to restore the structural disturbances in glycated LDL. Moreover, CD spectroscopy suggested reinstation of secondary structure of glycated LDL treated with rutin. Mechanistic insights between rutin and LDL were observed through spectroscopic measures. Molecular docking study confirmed the LDL-rutin binding with a binding energy of -10.0 kcal/mol. The rutin-LDL complex was revealed to be highly stable by molecular dynamics simulation, with RMSD, RMSF, Rg, SASA, and the secondary structure of LDL remaining essentially unchanged during the simulation period. Our study suggests that rutin possesses strong anti-glycating properties, which can be useful in therapeutics, as glycated LDL has an important role in atherosclerotic cardiovascular diseases.
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Affiliation(s)
- Mohd Junaid Wani
- Department of Biochemistry, J.N.M.C., Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, U.P., India.
| | - Khushtar Anwar Salman
- Department of Biochemistry, J.N.M.C., Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, U.P., India
| | - Md Amiruddin Hashmi
- Interdisciplinary Biotechnology Unit, Faculty of Life Science, Aligarh Muslim University, Aligarh 202002, U.P., India
| | - Sana Siddiqui
- Department of Biochemistry, J.N.M.C., Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, U.P., India
| | - Shagufta Moin
- Department of Biochemistry, J.N.M.C., Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, U.P., India
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91
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Kalra A, Benny A, Travis SM, Zizzi EA, Morales-Sanchez A, Oblinsky DG, Craddock TJA, Hameroff SR, MacIver MB, Tuszyński JA, Petry S, Penrose R, Scholes GD. Electronic Energy Migration in Microtubules. ACS CENTRAL SCIENCE 2023; 9:352-361. [PMID: 36968538 PMCID: PMC10037452 DOI: 10.1021/acscentsci.2c01114] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Indexed: 05/29/2023]
Abstract
The repeating arrangement of tubulin dimers confers great mechanical strength to microtubules, which are used as scaffolds for intracellular macromolecular transport in cells and exploited in biohybrid devices. The crystalline order in a microtubule, with lattice constants short enough to allow energy transfer between amino acid chromophores, is similar to synthetic structures designed for light harvesting. After photoexcitation, can these amino acid chromophores transfer excitation energy along the microtubule like a natural or artificial light-harvesting system? Here, we use tryptophan autofluorescence lifetimes to probe energy hopping between aromatic residues in tubulin and microtubules. By studying how the quencher concentration alters tryptophan autofluorescence lifetimes, we demonstrate that electronic energy can diffuse over 6.6 nm in microtubules. We discover that while diffusion lengths are influenced by tubulin polymerization state (free tubulin versus tubulin in the microtubule lattice), they are not significantly altered by the average number of protofilaments (13 versus 14). We also demonstrate that the presence of the anesthetics etomidate and isoflurane reduce exciton diffusion. Energy transport as explained by conventional Förster theory (accommodating for interactions between tryptophan and tyrosine residues) does not sufficiently explain our observations. Our studies indicate that microtubules are, unexpectedly, effective light harvesters.
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Affiliation(s)
- Aarat
P. Kalra
- Department
of Chemistry, New Frick Chemistry Building, Princeton University, Princeton, New Jersey08544, United States
| | - Alfy Benny
- Department
of Chemistry, New Frick Chemistry Building, Princeton University, Princeton, New Jersey08544, United States
| | - Sophie M. Travis
- Department
of Molecular Biology, Schultz Laboratory, Princeton University, Princeton, New Jersey08544, United States
| | - Eric A. Zizzi
- Department
of Mechanical and Aerospace Engineering (DIMEAS), Politecnico di Torino, Torino10129, Italy
| | - Austin Morales-Sanchez
- Department
of Chemistry, New Frick Chemistry Building, Princeton University, Princeton, New Jersey08544, United States
| | - Daniel G. Oblinsky
- Department
of Chemistry, New Frick Chemistry Building, Princeton University, Princeton, New Jersey08544, United States
| | - Travis J. A. Craddock
- Departments
of Psychology & Neuroscience, Computer Science, and Clinical Immunology, Nova Southeastern University, Ft. Lauderdale, Florida33314, United States
| | - Stuart R. Hameroff
- Department
of Anesthesiology, Center for Consciousness Studies, University of Arizona, Tucson, Arizona85721, United States
| | - M. Bruce MacIver
- Department
of Anesthesiology, Stanford University School
of Medicine, Stanford, California94305, United States
| | - Jack A. Tuszyński
- Department
of Mechanical and Aerospace Engineering (DIMEAS), Politecnico di Torino, Torino10129, Italy
- Department
of Physics, University of Alberta, Edmonton, AlbertaT6G 2E1, Canada
- Department
of Oncology, University of Alberta, Edmonton, AlbertaT6G 1Z2, Canada
| | - Sabine Petry
- Department
of Molecular Biology, Schultz Laboratory, Princeton University, Princeton, New Jersey08544, United States
| | - Roger Penrose
- Mathematical
Institute, Andrew Wiles Building, University
of Oxford, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United
Kingdom
| | - Gregory D. Scholes
- Department
of Chemistry, New Frick Chemistry Building, Princeton University, Princeton, New Jersey08544, United States
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92
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Povinelli APR, de Carvalho Bertozo L, Zazeri G, Ximenes VF. A flaw in applying the FRET technique to evaluate the distance between ligands and tryptophan residues in human serum albumin: Proposal of correction. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 242:112693. [PMID: 36947916 DOI: 10.1016/j.jphotobiol.2023.112693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/23/2023] [Accepted: 03/08/2023] [Indexed: 03/15/2023]
Abstract
Due to its primordial function as a drug carrier, human serum albumin (HSA) is extensively studied regarding its binding affinity with developing drugs. Förster resonance energy transfer (FRET) is frequently applied as a spectroscopic molecular ruler to measure the distance between the binding site and the ligand. In this work, we have shown that most of the published results that use the FRET technique to estimate the distance from ligands to the binding sites do not corroborate the crystallography data. By comparing the binding affinity of dansyl-proline with HSA and ovotransferrin, we demonstrated that FRET explains the quenching provoked by the interaction of ligands in albumin. So, why does the distance calculation via FRET not corroborate the crystallography data? We have shown that this inconsistency is related to the fact that a one-to-one relationship between donor and acceptor is not present in most experiments. Hence, the quenching efficiency used for calculating energy transfer depends on distance and binding constant, which is inconsistent with the correct application of FRET as a molecular ruler. We have also shown that the indiscriminate attribution of 2/3 to the relative orientation of transition dipoles of the acceptor and donor (κ2) generates inconsistencies. We proposed corrections based on the experimental equilibrium constant and theoretical orientation of transition dipoles to correct the FRET results.
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Affiliation(s)
- Ana Paula Ribeiro Povinelli
- Federal Institute of Education, Science and Technology of Mato Grosso, Campo Novo do Parecis, 78360-000, MT, Brazil
| | - Luiza de Carvalho Bertozo
- Department of Chemistry, Faculty of Sciences, UNESP - São Paulo State University, 17033-360 Bauru, SP, Brazil
| | - Gabriel Zazeri
- Federal Institute of Education, Science and Technology of Mato Grosso, Campo Novo do Parecis, 78360-000, MT, Brazil
| | - Valdecir Farias Ximenes
- Department of Chemistry, Faculty of Sciences, UNESP - São Paulo State University, 17033-360 Bauru, SP, Brazil.
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93
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Characterization of Spontaneous Melanization by Fluorescence Spectroscopy: A Basis for Analytical Application to Biological Substrates. BIOLOGY 2023; 12:biology12030433. [PMID: 36979125 PMCID: PMC10044826 DOI: 10.3390/biology12030433] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/07/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023]
Abstract
Melanin is present in various biological substrates where it may participate in several processes, from innate immunity to the still-unsolved opposite roles in antioxidant protection, including photoprotection and the related ability to interact with light. Melanin–light interaction has also been an important source of inspiration for the development of innovative bioengineering applications. These are based on melanin’s light-energy-absorption ability of its chemically and structurally complex components and precursors, and on the improvement in analytical and diagnostic procedures in biomedicine. In this regard, here, we characterized the fluorescence spectral properties of melanin and of its precursor L-tyrosine in an aqueous solution during spontaneous melanization. Besides the confirmation of the typical fluorescence-emission signature of melanin and L-tyrosine, we provide additional insights on both emission and excitation spectra recorded during melanization. On these bases, we performed a subsequent characterization on the aqueous extracts from two different melanin-containing biological substrates, namely hairs from a domestic black cat and eggs from the Asian tiger mosquito. The results from the mild extraction procedure, purposely applied to obtain only the soluble components, combined with fluorescence spectral analysis are expected to promote further investigation of the melanization processes, particularly in insects.
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94
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Structural Insights into the Ligand–LsrK Kinase Binding Mode: A Step Forward in the Discovery of Novel Antimicrobial Agents. Molecules 2023; 28:molecules28062542. [PMID: 36985513 PMCID: PMC10056567 DOI: 10.3390/molecules28062542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 03/14/2023] Open
Abstract
LsrK is a bacterial kinase that triggers the quorum sensing, and it represents a druggable target for the identification of new agents for fighting antimicrobial resistance. Herein, we exploited tryptophan fluorescence spectroscopy (TFS) as a suitable technique for the identification of potential LsrK ligands from an in-house library of chemicals comprising synthetic compounds as well as secondary metabolites. Three secondary metabolites (Hib-ester, Hib-carbaldehyde and (R)-ASME) showed effective binding to LsrK, with KD values in the sub-micromolar range. The conformational changes were confirmed via circular dichroism and molecular docking results further validated the findings and displayed the specific mode of interaction. The activity of the identified compounds on the biofilm formation by some Staphylococcus spp. was investigated. Hib-carbaldehyde and (R)-ASME were able to reduce the production of biofilm, with (R)-ASME resulting in the most effective compound with an EC50 of 14 mg/well. The successful application of TFS highlights its usefulness in searching for promising LsrK inhibitor candidates with inhibitor efficacy against biofilm formation.
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95
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Ströhl F, Wolfson DL, Opstad IS, Hansen DH, Mao H, Ahluwalia BS. Label-free superior contrast with c-band ultra-violet extinction microscopy. LIGHT, SCIENCE & APPLICATIONS 2023; 12:56. [PMID: 36864022 PMCID: PMC9981877 DOI: 10.1038/s41377-023-01105-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 02/14/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
In 1934, Frits Zernike demonstrated that it is possible to exploit the sample's refractive index to obtain superior contrast images of biological cells. The refractive index contrast of a cell surrounded by media yields a change in the phase and intensity of the transmitted light wave. This change can be due to either scattering or absorption caused by the sample. Most cells are transparent at visible wavelengths, which means the imaginary component of their complex refractive index, also known as extinction coefficient k, is close to zero. Here, we explore the use of c-band ultra-violet (UVC) light for high-contrast high-resolution label-free microscopy, as k is naturally substantially higher in the UVC than at visible wavelengths. Using differential phase contrast illumination and associated processing, we achieve a 7- to 300-fold improvement in contrast compared to visible-wavelength and UVA differential interference contrast microscopy or holotomography, and quantify the extinction coefficient distribution within liver sinusoidal endothelial cells. With a resolution down to 215 nm, we are, for the first time in a far-field label-free method, able to image individual fenestrations within their sieve plates which normally requires electron or fluorescence superresolution microscopy. UVC illumination also matches the excitation peak of intrinsically fluorescent proteins and amino acids and thus allows us to utilize autofluorescence as an independent imaging modality on the same setup.
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Affiliation(s)
- Florian Ströhl
- Department of Physics and Technology, UiT The Arctic University of Norway, Tromsø, Norway.
| | - Deanna L Wolfson
- Department of Physics and Technology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Ida S Opstad
- Department of Physics and Technology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Daniel H Hansen
- Department of Physics and Technology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Hong Mao
- Department of Physics and Technology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Balpreet S Ahluwalia
- Department of Physics and Technology, UiT The Arctic University of Norway, Tromsø, Norway
- Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden
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96
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Saha M, Ghosh SS. Engineered Hybrid Nanosystem for Homologous Targeting of EMT Induced Triple Negative Breast Cancer Cells. ACS APPLIED BIO MATERIALS 2023; 6:681-693. [PMID: 36662500 DOI: 10.1021/acsabm.2c00925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The increased mortality rate due to metastatic breast cancer with poor prognosis has raised concern over its effective therapy. Though various therapies and anticancer drugs have been approved, there is still a lack in the targeting of metastatic triple negative breast cancer (TNBC). We have developed a hybrid nanosystem that was synthesized by fusing exosomes from MCF-7 cells and nanovesicles from the MDA MB-231 cells that would be targeted. The developed nanosystem was characterized by various techniques like Western blotting, AFM, FETEM, DLS, CD, and fluorescence spectroscopy. The hybrid system was used for the delivery of an HDAC inhibitor, Trichostatin A (TSA), in combination with lapatinib (a tyrosine kinase inhibitor) for cotherapy of epithelial to mesenchymal transition (EMT) induced TNBC. This targeted cotherapy module had higher efficiency and effectivity in the reduction of metastatic ability and proliferation of EMT induced MDA MB-231 cells as compared to free inhibitor treatment or untargeted cotherapy. Reduction in the expression of the Wnt/β-catenin signaling pathway molecules like β-catenin (by 0.7 fold), Gsk3β (by 0.6 fold), and pGsk-3β (0.3 fold) was observed upon treatment. This subsequently resulted in the suppression of EMT markers, thereby resulting in reversing EMT to MET and suppressing metastatic breast cancer.
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Affiliation(s)
- Muktashree Saha
- Department of Biosciences & Bioengineering, Indian Institute of Technology Guwahati, Guwahati781039, Assam, India
| | - Siddhartha Sankar Ghosh
- Department of Biosciences & Bioengineering, Indian Institute of Technology Guwahati, Guwahati781039, Assam, India.,Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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97
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Kegulian NC, Langen R, Moradian-Oldak J. The Dynamic Interactions of a Multitargeting Domain in Ameloblastin Protein with Amelogenin and Membrane. Int J Mol Sci 2023; 24:3484. [PMID: 36834897 PMCID: PMC9966149 DOI: 10.3390/ijms24043484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/28/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
The enamel matrix protein Ameloblastin (Ambn) has critical physiological functions, including regulation of mineral formation, cell differentiation, and cell-matrix adhesion. We investigated localized structural changes in Ambn during its interactions with its targets. We performed biophysical assays and used liposomes as a cell membrane model. The xAB2N and AB2 peptides were rationally designed to encompass regions of Ambn that contained self-assembly and helix-containing membrane-binding motifs. Electron paramagnetic resonance (EPR) on spin-labeled peptides showed localized structural gains in the presence of liposomes, amelogenin (Amel), and Ambn. Vesicle clearance and leakage assays indicated that peptide-membrane interactions were independent from peptide self-association. Tryptophan fluorescence and EPR showed competition between Ambn-Amel and Ambn-membrane interactions. We demonstrate localized structural changes in Ambn upon interaction with different targets via a multitargeting domain, spanning residues 57 to 90 of mouse Ambn. Structural changes of Ambn following its interaction with different targets have relevant implications for the multifunctionality of Ambn in enamel formation.
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Affiliation(s)
- Natalie C. Kegulian
- Center for Craniofacial Molecular Biology, Department of Biomedical Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA
| | - Ralf Langen
- Department of Neuroscience and Physiology, Department of Biochemistry and Molecular Medicine, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Janet Moradian-Oldak
- Center for Craniofacial Molecular Biology, Department of Biomedical Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA
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98
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Ageeva AA, Lukyanov RS, Martyanova SO, Magin IM, Kruppa AI, Polyakov NE, Plyusnin VF, Doktorov AB, Leshina TV. Photoinduced Processes in Lysine-Tryptophan-Lysine Tripeptide with L and D Tryptophan. Int J Mol Sci 2023; 24:ijms24043331. [PMID: 36834744 PMCID: PMC9967182 DOI: 10.3390/ijms24043331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/01/2023] [Accepted: 02/04/2023] [Indexed: 02/11/2023] Open
Abstract
Optical isomers of short peptide Lysine-Tryptophan-Lysine (Lys-{L/D-Trp}-Lys) and Lys-Trp-Lys with an acetate counter-ion were used to study photoinduced intramolecular and intermolecular processes of interest in photobiology. A comparison of L- and D-amino acid reactivity is also the focus of scientists' attention in various specialties because today, the presence of amyloid proteins with D-amino acids in the human brain is considered one of the leading causes of Alzheimer's disease. Since aggregated amyloids, mainly Aβ42, are highly disordered peptides that cannot be studied with traditional NMR and X-ray techniques, it is trending to explore the reasons for differences between L- and D-amino acids using short peptides, as in our article. Using NMR, chemically induced dynamic nuclear polarization (CIDNP) and fluorescence techniques allowed us to detect the influence of tryptophan (Trp) optical configuration on the peptides fluorescence quantum yields, bimolecular quenching rates of Trp excited state, and the photocleavage products formation. Thus, compared with the D-analog, the L-isomer shows a greater Trp excited state quenching efficiency with the electron transfer (ET) mechanism. There are experimental confirmations of the hypothesis about photoinduced ET between Trp and the CONH peptide bond, as well as between Trp and another amide group.
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Affiliation(s)
- Aleksandra A. Ageeva
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
- Department of Natural Sciences, Department of Physics, Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia
| | - Roman S. Lukyanov
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
- Department of Natural Sciences, Department of Physics, Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia
| | - Sofia O. Martyanova
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
- Department of Natural Sciences, Department of Physics, Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia
| | - Ilya M. Magin
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
| | - Alexander I. Kruppa
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
| | - Nikolay E. Polyakov
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
| | - Victor F. Plyusnin
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
- Department of Natural Sciences, Department of Physics, Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia
| | - Alexander B. Doktorov
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
- Correspondence: author:
| | - Tatyana V. Leshina
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090 Novosibirsk, Russia
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99
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Gayer AV, Yakimov BP, Sluchanko NN, Shirshin EA. Multifarious analytical capabilities of the UV/Vis protein fluorescence in blood plasma. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:122028. [PMID: 36327910 DOI: 10.1016/j.saa.2022.122028] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/09/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Autofluorescence of blood plasma has been broadly considered as a prospective disease screening method. However, the assessment of such intrinsic fluorescence is mostly phenomenological, and its origin is still not fully understood, complicating its use in the clinical practice. Here we present the detailed evaluation of analytical capabilities, variability, and formation of blood plasma protein fluorescence based on the open dataset of excitation-emission matrices measured for ∼300 patients with suspected colorectal cancer, and our supporting model experiments. Using high-resolution size-exclusion chromatography coupled with comprehensive spectral analysis, we demonstrate, for the first time, the dominant role of HSA in the formation of blood plasma fluorescence in the visible spectral range (excitation wavelength >350 nm), presumably caused by its oxidative modifications. Furthermore, the diagnostic value of the tryptophan emission, as well as of the tyrosine fluorescence and visible fluorescence of proteins is shown by building a tree-based classification model that uses a small subset of physically interpretable fluorescence features for distinguishing between the control group and cancer patients with >80% accuracy. The obtained results extend current understanding and approaches used for the analysis of blood plasma fluorescence and pave the way for novel autofluorescence-based disease screening methods.
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Affiliation(s)
- Alexey V Gayer
- Faculty of Physics, M.V. Lomonosov Moscow State University, 1-2 Leninskie Gory, Moscow 119991, Russia; Laboratory of Clinical Biophotonics, Biomedical Science and Technology Park, Sechenov First Moscow State Medical University, Trubetskaya 8, Moscow 119048, Russia
| | - Boris P Yakimov
- Faculty of Physics, M.V. Lomonosov Moscow State University, 1-2 Leninskie Gory, Moscow 119991, Russia; Laboratory of Clinical Biophotonics, Biomedical Science and Technology Park, Sechenov First Moscow State Medical University, Trubetskaya 8, Moscow 119048, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Evgeny A Shirshin
- Faculty of Physics, M.V. Lomonosov Moscow State University, 1-2 Leninskie Gory, Moscow 119991, Russia; Laboratory of Clinical Biophotonics, Biomedical Science and Technology Park, Sechenov First Moscow State Medical University, Trubetskaya 8, Moscow 119048, Russia.
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100
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Wani MJ, Salman KA, Moin S, Arif A. Effect of crocin on glycated human low-density lipoprotein: A protective and mechanistic approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:121958. [PMID: 36244155 DOI: 10.1016/j.saa.2022.121958] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 09/17/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Human low-density lipoprotein (LDL) is known to have a role in coronary artery diseases when it undergoes modification due to hyperglycaemic conditions. Plant products like crocin play an essential role in protecting against oxidative stress and in the production of advanced glycation end-products (A.G.E.s). In this study, the anti-glycating effect of crocin was analyzed using various biochemical, spectroscopic, and in silico approaches. Glycation-mediated oxidative stress was confirmed by nitroblue tetrazolium, carbonyl content, and lipid peroxidation assays, and it was efficiently protected by crocin in a concentration-dependent manner. A.N.S. fluorescence, thioflavin T (ThT) assay, and electron microscopy confirmed that the structural changes in LDL during glycation lead to the formation of fibrillar aggregates, which can be minimized by crocin treatment. Moreover, secondary structural perturbations in LDL were observed using circular dichroism (CD) and Fourier transform infrared spectroscopy (FTIR), where crocin was found to prevent the loss of secondary structure in glycated LDL. Spectroscopic studies like U.V. absorbance, fluorescence spectroscopy, CD, FTIR, and fluorescence resonance energy transfer (FRET) provided insights into the interaction mechanism between LDL and crocin. Molecular docking supports these results with a highly negative binding energy of -10.3 kcal/mol, suggesting the formation of a stable ldl-crocin complex. Our study indicates that crocin may be a potent protective agent against coronary artery diseases by limiting the glycation of LDL in people with such disorders.
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Affiliation(s)
- Mohd Junaid Wani
- Department of Biochemistry, J.N.M.C., Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, (U.P.), India.
| | - Khushtar Anwar Salman
- Department of Biochemistry, J.N.M.C., Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, (U.P.), India
| | - Shagufta Moin
- Department of Biochemistry, J.N.M.C., Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, (U.P.), India
| | - Amin Arif
- Department of Biochemistry, Faculty of Life Science, Aligarh Muslim University, Aligarh 202002, (U.P.), India
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