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Guzzi R, Bartucci R. Thermal effects and drugs competition on the palmitate binding capacity of human serum albumin. Biochem Biophys Res Commun 2024; 722:150168. [PMID: 38797156 DOI: 10.1016/j.bbrc.2024.150168] [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: 03/14/2024] [Revised: 05/17/2024] [Accepted: 05/22/2024] [Indexed: 05/29/2024]
Abstract
Human serum albumin (HSA) is the most abundant plasma protein of the circulatory system. It is a multidomain, multifunctional protein that, combining diverse affinities and wide specificity, binds, stores, and transports a variety of biological compounds, pharmacores, and fatty acids. HSA is finding increasing uses in drug-delivery due to its ability to carry functionalized ligands and prodrugs. All this raises the question of competition for binding sites occupancy in case of multiple ligands, which in turn influences the protein structure/dynamic/function relationship and also has an impact on the biomedical applications. In this work, the effects of interactive binding of palmitic acid (PA), warfarin (War) and ibuprofen (Ibu) on the thermal stability of HSA were studied using DSC, ATR-FTIR, and EPR. PA is a high-affinity physiological ligand, while the two drugs are widely used for their anticoagulant (War) and anti-inflammatory (Ibu) efficacy, and are exogenous compounds that accommodate in the deputed drug site DS1 and DS2, respectively overlapping with some of the fatty acid binding sites. The results indicate that HSA acquires the highest thermal stability when it is fully saturated with PA. The binding of this physiological ligand does not hamper the binding of War or Ibu to the native state of the protein. In addition, the three ligands bind simultaneously, suggesting a synergic cooperative influence due to allosteric effects. The increased thermal stability subsequent to binary and multiple ligands binding moderates protein aggregation propensity and restricts protein dynamics. The biophysics findings provide interesting features about protein stability, aggregation, and dynamics in interaction with multiple ligands and are relevant in drug-delivery.
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Affiliation(s)
- Rita Guzzi
- Department of Physics, Molecular Biophysics Laboratory, University of Calabria, 87036, Rende, Italy; CNR-NANOTEC, Department of Physics, University of Calabria, 87036, Rende, Italy.
| | - Rosa Bartucci
- Department of Physics, Molecular Biophysics Laboratory, University of Calabria, 87036, Rende, Italy
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2
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Sharifi S, Yamamoto T, Zeug A, Elsner M, Avezov E, Mehmeti I. Non-esterified fatty acid palmitate facilitates oxidative endoplasmic reticulum stress and apoptosis of β-cells by upregulating ERO-1α expression. Redox Biol 2024; 73:103170. [PMID: 38692092 PMCID: PMC11070623 DOI: 10.1016/j.redox.2024.103170] [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: 04/11/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/03/2024] Open
Abstract
Adipose tissue-derived non-esterified saturated long-chain fatty acid palmitate (PA) decisively contributes to β-cell demise in type 2 diabetes mellitus in part through the excessive generation of hydrogen peroxide (H2O2). The endoplasmic reticulum (ER) as the primary site of oxidative protein folding could represent a significant source of H2O2. Both ER-oxidoreductin-1 (ERO-1) isoenzymes, ERO-1α and ERO-1β, catalyse oxidative protein folding within the ER, generating equimolar amounts of H2O2 for every disulphide bond formed. However, whether ERO-1-derived H2O2 constitutes a potential source of cytotoxic luminal H2O2 under lipotoxic conditions is still unknown. Here, we demonstrate that both ERO-1 isoforms are expressed in pancreatic β-cells, but interestingly, PA only significantly induces ERO-1α. Its specific deletion significantly attenuates PA-mediated oxidative ER stress and subsequent β-cell death by decreasing PA-mediated ER-luminal and mitochondrial H2O2 accumulation, by counteracting the dysregulation of ER Ca2+ homeostasis, and by mitigating the reduction of mitochondrial membrane potential and lowered ATP content. Moreover, ablation of ERO-1α alleviated PA-induced hyperoxidation of the ER redox milieu. Importantly, ablation of ERO-1α did not affect the insulin secretory capacity, the unfolded protein response, or ER redox homeostasis under steady-state conditions. The involvement of ERO-1α-derived H2O2 in PA-mediated β-cell lipotoxicity was corroborated by the overexpression of a redox-active ERO-1α underscoring the proapoptotic activity of ERO-1α in pancreatic β-cells. Overall, our findings highlight the critical role of ERO-1α-derived H2O2 in lipotoxic ER stress and β-cell failure.
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Affiliation(s)
- Sarah Sharifi
- Institute of Clinical Biochemistry, Hannover Medical School, 30625, Hannover, Germany
| | - Tomoko Yamamoto
- Institute of Clinical Biochemistry, Hannover Medical School, 30625, Hannover, Germany
| | - Andre Zeug
- Institute for Neurophysiology, Hannover Medical School, 30625, Hannover, Germany
| | - Matthias Elsner
- Institute of Clinical Biochemistry, Hannover Medical School, 30625, Hannover, Germany
| | - Edward Avezov
- Department of Clinical Neurosciences and UK Dementia Research Institute, University of Cambridge, CB2 0AH Cambridge, UK
| | - Ilir Mehmeti
- Institute of Clinical Biochemistry, Hannover Medical School, 30625, Hannover, Germany.
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3
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Berger O, Choi W, Ko CH, Thompson MP, Avram MJ, Scott DJ, Hoare BL, Cridge R, Wheatley M, Bathgate RAD, Batlle D, Gianneschi NC. Long-Circulating Vasoactive 1,18-Octadecanedioic Acid-Terlipressin Conjugate. ACS Pharmacol Transl Sci 2024; 7:1252-1261. [PMID: 38751631 PMCID: PMC11092119 DOI: 10.1021/acsptsci.3c00305] [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: 10/27/2023] [Revised: 03/29/2024] [Accepted: 04/15/2024] [Indexed: 05/18/2024]
Abstract
Hepatorenal syndrome (HRS) is a life-threatening complication of end-stage liver disease first reported over a century ago, but its management still poses an unmet challenge. A therapeutic agent found to stabilize the condition is a short cyclic peptide, vasopressin analogue, terlipressin (TP). While TP is commonly prescribed for HRS patients in most parts of the world, it was only recently approved for use in the United States. TP exhibits short circulation half-lives and adverse side effects associated with the dose required. Herein, we present a 1,18-octadecanedioic acid (ODDA) conjugate of the cyclic peptide (ODDA-TP), which enables noncovalent binding to serum albumin via native fatty acid binding modes. ODDA-TP is demonstrated to outperform TP alone in studies including in vitro cellular receptor activation, stability in plasma, pharmacokinetics, and performance in vivo in rats. Specifically, ODDA-TP had an elimination half-life 20 times that of TP alone while exhibiting a superior safety profile.
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Affiliation(s)
- Or Berger
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Wonmin Choi
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Caroline H. Ko
- NewCures,
Innovation and Ventures Office, Northwestern
University, Evanston, Illinois 60208, United States
| | - Matthew P. Thompson
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael J. Avram
- Feinberg
Medical School, Northwestern University, Chicago, Illinois 60611, United States
- Department
of Anesthesiology, Northwestern University, Chicago, Illinois 60611, United States
| | - Daniel J. Scott
- The
Florey,Parkville, Victoria 3010, Australia
- Department
of Biochemistry and Pharmacology, The University
of Melbourne, Parkville, Victoria 3010, Australia
| | | | | | - Mark Wheatley
- Centre
for Sport, Exercise and Life Sciences, Coventry
University, Coventry CV1 5FB, U.K.
- Centre
of Membrane Proteins and Receptors (COMPARE), University of Birmingham and University of Nottingham, Midlands B15 2TT, U.K.
| | - Ross A. D. Bathgate
- The
Florey,Parkville, Victoria 3010, Australia
- Department
of Biochemistry and Pharmacology, The University
of Melbourne, Parkville, Victoria 3010, Australia
| | - Daniel Batlle
- Feinberg
Medical School, Northwestern University, Chicago, Illinois 60611, United States
- Department
of Medicine Division of Nephrology and Hypertension, Chicago, Illinois 60611, United States
| | - Nathan C. Gianneschi
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
- Department of Biomedical Engineering, Northwestern
University, Evanston, Illinois 60208, United States
- Department of Pharmacology, Northwestern
University, Chicago, Illinois 60611, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
- Simpson-Querrey Institute, Northwestern
University, Chicago, Illinois 60611, United States
- Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
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4
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Carabadjac I, Vormittag LC, Muszer T, Wuth J, Ulbrich MH, Heerklotz H. Transfer of ANS-Like Drugs from Micellar Drug Delivery Systems to Albumin Is Highly Favorable and Protected from Competition with Surfactant by "Reserved" Binding Sites. Mol Pharm 2024; 21:2198-2211. [PMID: 38625037 DOI: 10.1021/acs.molpharmaceut.3c00875] [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] [Indexed: 04/17/2024]
Abstract
Micellar drug delivery systems (MDDS) for the intravenous administration of poorly soluble drugs have great advantages over alternative formulations in terms of the safety of their excipients, storage stability, and straightforward production. A classic example is mixed micelles of glycocholate (GC) and lecithin, both endogenous substances in human blood. What limits the use of MDDS is the complexity of the transitions after injection. In particular, as the MDDS disintegrate partially or completely after injection, the drug has to be transferred safely to endogenous carriers in the blood, such as human serum albumin (HSA). If this transfer is compromised, the drug might precipitate─a process that needs to be excluded under all circumstances. The key question of this paper is whether the high local concentration of GC at the moment and site of MDDS dissolution might transiently saturate HSA binding sites and, hence, endanger quick drug transfer. To address this question, we have used a new approach, which is time-resolved fluorescence spectroscopy of the single tryptophan in HSA, Trp-214, to characterize the competitive binding of GC and the drug substitute anilinonaphthalenesulfonate (ANS) to HSA. Time-resolved fluorescence of Trp-214 showed important advantages over established methods for tackling this problem. ANS has been the standard "model drug" to study albumin binding for decades, given its structural similarity to the class of naphthalene-containing acidic drugs and the fact that it is displaced from HSA by numerous drugs (which presumably bind to the same sites). Our complex global fit uses the critical approximation that the average lifetimes behave similarly to a single lifetime, but the resulting errors are found to be moderate and the results provide a convincing explanation of the, at first glance, counterintuitive behavior. Accordingly, and largely in line with the literature, we observed two types of sites binding ANS at HSA: 3 type A, rather peripheral, and 2 type B, likely more central sites. The latter quench Trp-214 by Förster Resonance Energy Transfer (FRET) with a rate constant of ≈0.4 ns-1 per ANS. Adding millimolar concentrations of GC displaces ANS from the A sites but not from B sites. At incomplete ANS saturation, this causes a GC-induced translocation of ANS from A to the more FRET-active B sites. This leads to the apparent paradox that the partial displacement of ANS from HSA increases its quenching effect on Trp-214. The most important conclusion is that (ANS-like) drugs cannot be displaced from the type-B sites, and consequently, drug transfer to these sites is not impaired by competitive binding of GC in the vicinity of a dissolving micelle. The second conclusion is that for unbound GC above the CMC (9 mM), ANS equilibrates between HSA and GC micelles but with a strong preference for free sites on HSA. That means that even persisting micelles would lose their cargo readily once exposed to HSA. For all MDDS sharing this property, targeted drug delivery approaches involving them as the nanocarrier would be pointless.
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Affiliation(s)
- Iulia Carabadjac
- Institute of Pharmaceutical Sciences, University of Freiburg, Hermann-Herder-Str. 9, 79104 Freiburg, Germany
| | - Leonie C Vormittag
- Institute of Pharmaceutical Sciences, University of Freiburg, Hermann-Herder-Str. 9, 79104 Freiburg, Germany
| | - Thomas Muszer
- Institute of Pharmaceutical Sciences, University of Freiburg, Hermann-Herder-Str. 9, 79104 Freiburg, Germany
| | - Jakob Wuth
- Institute of Pharmaceutical Sciences, University of Freiburg, Hermann-Herder-Str. 9, 79104 Freiburg, Germany
| | - Maximilian H Ulbrich
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, Albertstr. 17, 79104 Freiburg, Germany
- BIOSS Centre for Biological Signalling Studies, Schan̈zlestr. 18, Freiburg 79104, Germany
| | - Heiko Heerklotz
- Institute of Pharmaceutical Sciences, University of Freiburg, Hermann-Herder-Str. 9, 79104 Freiburg, Germany
- Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto M5s 3M2, Ontario, Canada
- BIOSS Centre for Biological Signalling Studies, Schan̈zlestr. 18, Freiburg 79104, Germany
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5
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Rae CD, Baur JA, Borges K, Dienel G, Díaz-García CM, Douglass SR, Drew K, Duarte JMN, Duran J, Kann O, Kristian T, Lee-Liu D, Lindquist BE, McNay EC, Robinson MB, Rothman DL, Rowlands BD, Ryan TA, Scafidi J, Scafidi S, Shuttleworth CW, Swanson RA, Uruk G, Vardjan N, Zorec R, McKenna MC. Brain energy metabolism: A roadmap for future research. J Neurochem 2024; 168:910-954. [PMID: 38183680 PMCID: PMC11102343 DOI: 10.1111/jnc.16032] [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: 05/27/2023] [Revised: 11/29/2023] [Accepted: 12/05/2023] [Indexed: 01/08/2024]
Abstract
Although we have learned much about how the brain fuels its functions over the last decades, there remains much still to discover in an organ that is so complex. This article lays out major gaps in our knowledge of interrelationships between brain metabolism and brain function, including biochemical, cellular, and subcellular aspects of functional metabolism and its imaging in adult brain, as well as during development, aging, and disease. The focus is on unknowns in metabolism of major brain substrates and associated transporters, the roles of insulin and of lipid droplets, the emerging role of metabolism in microglia, mysteries about the major brain cofactor and signaling molecule NAD+, as well as unsolved problems underlying brain metabolism in pathologies such as traumatic brain injury, epilepsy, and metabolic downregulation during hibernation. It describes our current level of understanding of these facets of brain energy metabolism as well as a roadmap for future research.
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Affiliation(s)
- Caroline D. Rae
- School of Psychology, The University of New South Wales, NSW 2052 & Neuroscience Research Australia, Randwick, New South Wales, Australia
| | - Joseph A. Baur
- Department of Physiology and Institute for Diabetes, Obesity and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Karin Borges
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, St Lucia, QLD, Australia
| | - Gerald Dienel
- Department of Neurology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
- Department of Cell Biology and Physiology, University of New Mexico School of Medicine, Albuquerque, New Mexico, USA
| | - Carlos Manlio Díaz-García
- Department of Biochemistry and Molecular Biology, Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | | | - Kelly Drew
- Center for Transformative Research in Metabolism, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, Alaska, USA
| | - João M. N. Duarte
- Department of Experimental Medical Science, Faculty of Medicine, Lund University, Lund, & Wallenberg Centre for Molecular Medicine, Lund University, Lund, Sweden
| | - Jordi Duran
- Institut Químic de Sarrià (IQS), Universitat Ramon Llull (URL), Barcelona, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Oliver Kann
- Institute of Physiology and Pathophysiology, University of Heidelberg, D-69120; Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
| | - Tibor Kristian
- Veterans Affairs Maryland Health Center System, Baltimore, Maryland, USA
- Department of Anesthesiology and the Center for Shock, Trauma, and Anesthesiology Research (S.T.A.R.), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Dasfne Lee-Liu
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago, Región Metropolitana, Chile
| | - Britta E. Lindquist
- Department of Neurology, Division of Neurocritical Care, Gladstone Institute of Neurological Disease, University of California at San Francisco, San Francisco, California, USA
| | - Ewan C. McNay
- Behavioral Neuroscience, University at Albany, Albany, New York, USA
| | - Michael B. Robinson
- Departments of Pediatrics and System Pharmacology & Translational Therapeutics, Children’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Douglas L. Rothman
- Magnetic Resonance Research Center and Departments of Radiology and Biomedical Engineering, Yale University, New Haven, Connecticut, USA
| | - Benjamin D. Rowlands
- School of Chemistry, Faculty of Science, The University of Sydney, Sydney, New South Wales, Australia
| | - Timothy A. Ryan
- Department of Biochemistry, Weill Cornell Medicine, New York, New York, USA
| | - Joseph Scafidi
- Department of Neurology, Kennedy Krieger Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Susanna Scafidi
- Anesthesiology & Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - C. William Shuttleworth
- Department of Neurosciences, University of New Mexico School of Medicine Albuquerque, Albuquerque, New Mexico, USA
| | - Raymond A. Swanson
- Department of Neurology, University of California, San Francisco, and San Francisco Veterans Affairs Medical Center, San Francisco, California, USA
| | - Gökhan Uruk
- Department of Neurology, University of California, San Francisco, and San Francisco Veterans Affairs Medical Center, San Francisco, California, USA
| | - Nina Vardjan
- Laboratory of Cell Engineering, Celica Biomedical, Ljubljana, Slovenia
- Laboratory of Neuroendocrinology—Molecular Cell Physiology, Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Robert Zorec
- Laboratory of Cell Engineering, Celica Biomedical, Ljubljana, Slovenia
- Laboratory of Neuroendocrinology—Molecular Cell Physiology, Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Mary C. McKenna
- Department of Pediatrics and Program in Neuroscience, University of Maryland School of Medicine, Baltimore, Maryland, USA
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6
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Starnes HM, Jackson TW, Rock KD, Belcher SM. Quantitative cross-species comparison of serum albumin binding of per- and polyfluoroalkyl substances from five structural classes. Toxicol Sci 2024; 199:132-149. [PMID: 38518100 PMCID: PMC11057469 DOI: 10.1093/toxsci/kfae028] [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] [Indexed: 03/24/2024] Open
Abstract
Per- and polyfluoroalkyl substances (PFAS) are a class of over 8000 chemicals, many of which are persistent, bioaccumulative, and toxic to humans, livestock, and wildlife. Serum protein binding affinity is instrumental in understanding PFAS toxicity, yet experimental binding data is limited to only a few PFAS congeners. Previously, we demonstrated the usefulness of a high-throughput, in vitro differential scanning fluorimetry assay for determination of relative binding affinities of human serum albumin for 24 PFAS congeners from 6 chemical classes. In the current study, we used this assay to comparatively examine differences in human, bovine, porcine, and rat serum albumin binding of 8 structurally informative PFAS congeners from 5 chemical classes. With the exception of the fluorotelomer alcohol 1H, 1H, 2H, 2H-perfluorooctanol (6:2 FTOH), each PFAS congener bound by human serum albumin was also bound by bovine, porcine, and rat serum albumin. The critical role of the charged functional headgroup in albumin binding was supported by the inability of albumin of each species tested to bind 6:2 FTOH. Significant interspecies differences in serum albumin binding affinities were identified for each of the bound PFAS congeners. Relative to human albumin, perfluoroalkyl carboxylic and sulfonic acids were bound with greater affinity by porcine and rat serum albumin, and the perfluoroalkyl ether acid congener bound with lower affinity to porcine and bovine serum albumin. These comparative affinity data for PFAS binding by serum albumin from human, experimental model, and livestock species reduce critical interspecies uncertainty and improve accuracy of predictive bioaccumulation and toxicity assessments for PFAS.
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Affiliation(s)
- Hannah M Starnes
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27607, USA
| | - Thomas W Jackson
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27607, USA
| | - Kylie D Rock
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27607, USA
| | - Scott M Belcher
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27607, USA
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7
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Chen B, Wang C, Li W. Serum albumin levels and risk of atrial fibrillation: a Mendelian randomization study. Front Cardiovasc Med 2024; 11:1385223. [PMID: 38655495 PMCID: PMC11035896 DOI: 10.3389/fcvm.2024.1385223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 03/26/2024] [Indexed: 04/26/2024] Open
Abstract
Objective Although several observational studies have linked serum albumin to cardiovascular disease and considered it as an important biomarker, little is known about whether increasing or maintaining serum albumin levels can effectively improve the prognosis of patients with atrial fibrillation. Therefore, this study aims to further explore the causal relationship between serum albumin and atrial fibrillation and its potential mechanism. Method Using data from large-scale genome-wide association studies, we conducted a two-sample Mendelian randomization (MR) analysis and a mediation MR analysis, using serum albumin as the exposure variable and atrial fibrillation as the outcome variable. We included 486 serum metabolites as potential mediating factors. To increase the robustness of the analysis, we applied five statistical methods, including inverse variance weighted, weighted median, MR-Egger, simple mode, and weighted mode. Validate the MR results using Bayesian weighted Mendelian randomization method. Result The results of the MR analysis indicate a significant inverse association between genetically predicted serum albumin concentration (g/L) and the risk of atrial fibrillation (Beta = -0.172, OR = 0.842, 95% CI: 0.753-0.941, p = 0.002). Further mediation MR analysis revealed that serum albumin may mediate the causal relationship with atrial fibrillation by affecting two serum metabolites, docosatrienoate and oleate/vaccenate, and the mediating effect was significant. In addition, all our instrumental variables showed no heterogeneity and level-multiplicity in the MR analysis. To verify the stability of the results, we also conducted a sensitivity analysis using the leave-one-out method, and the results further confirmed that our findings were robust and reliable. Finally, we conducted a validation using the Bayesian weighted Mendelian randomization method, which demonstrated the reliability of our causal inference results. Conclusion This study strongly demonstrates the causal relationship between serum albumin and reduced risk of atrial fibrillation through genetic methods, and reveals the key mediating role of two serum metabolites in this relationship. These findings not only provide a new perspective for our understanding of the role of serum albumin in atrial fibrillation, but also provide new ideas for the prevention and treatment strategies of atrial fibrillation.
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Affiliation(s)
- Bohang Chen
- The First Clinical Medical College, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Chuqiao Wang
- The First Clinical Medical College, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Wenjie Li
- Department of Cardiovascular Medicine, Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
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8
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Bae Y, Liu X. Unveiling the effects of protein corona formation on the aggregation kinetics of gold nanoparticles in monovalent and divalent electrolytes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 346:123552. [PMID: 38346633 DOI: 10.1016/j.envpol.2024.123552] [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: 08/07/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 02/22/2024]
Abstract
Elucidation of the aggregation behaviors of gold nanoparticles (AuNPs) in water systems is crucial to understanding their environmental fate and transport as well as human health effects. We investigated the early-stage aggregation kinetics of AuNPs coated by human serum albumin (HSA) protein corona (PC) in NaCl and CaCl2 through time-resolved dynamic light scattering. We found that the aggregation of PC-AuNPs depended on the concerted effects of electrolyte concentration, valence, and HSA concentration. At low HSA concentration (≤0.005 g/L), the aggregation kinetics of PC-AuNPs was similar to that of bare AuNPs due to insignificant HSA adsorption. At intermediate HSA concentrations of 0.025-0.050 g/L, the aggregation of PC-AuNPs was retarded in both electrolytes due to steric repulsive forces imparted by the PCs. Additionally, HSA PCs had a weaker retardation effect on PC-AuNPs aggregation in divalent than in monovalent electrolytes. Quartz crystal microbalance measurements revealed that the presence of Ca2+ promoted additional HSA adsorption on PC-AuNPs likely via -COO-Ca2+ bond, and eventually enhanced the aggregation between PC-AuNPs. High-concentration HSA (>0.5 g/L) resulted in no PC-AuNPs aggregation regardless of electrolyte valence and concentrations. Finally, desorption of HSA barely occurred after adsorption on the gold surface, suggesting that the formation of PC-AuNPs is mostly irreversible.
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Affiliation(s)
- Yeunook Bae
- Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Xitong Liu
- Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States.
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9
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Liang Y, Li Y, Ma R, Duan C. Purification and Activity Evaluation of a Novel Thrombopoietin Mimetic Peptide. J Pharm Sci 2024; 113:359-365. [PMID: 38006944 DOI: 10.1016/j.xphs.2023.11.020] [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: 08/22/2023] [Revised: 11/18/2023] [Accepted: 11/19/2023] [Indexed: 11/27/2023]
Abstract
The emergence of thrombopoietin mimetic peptides presents a promising therapeutic strategy for addressing thrombocytopenia. This particular study aimed to establish a direct, expeditious, and efficient method for modifying and purifying a novel thrombopoietin mimetic peptide. Precursor proteins were subjected to modification utilizing three distinct fatty acids: C25H42O7N2, C39H66O15N4, and C41H70O15N4. Liquid chromatography analyses demonstrated that C41H70O15N4 yielded the most effective modification results. Mass spectrometry findings validated the correspondence between the theoretical and actual molecular weights of each sample. In vivo experiments conducted on normal mice showcased that the C41H70O15N4 modification group exhibited the highest platelet count, peaking at an impressive 5047 × 109/L. This count was approximately twice that of the peak platelet count observed in the dTMP group and four times higher than the control group. Pharmacokinetic investigations revealed that the C41H70O15N4 modification group displayed the lengthiest half-life among beagles, persisting for 128.5 h. This duration was approximately 28.5 times longer than that of the unmodified dTMP group. These findings underscore the effectiveness of the established C41H70O15N4 modification and purification method in preserving the biological activity of the thrombopoietin mimetic peptide. The novel thrombopoietin mimetic peptide showcased notable attributes of simplicity and cost-effectiveness, while also exhibiting a significant platelet-promoting effect and an extended half-life. Consequently, this novel peptide holds substantial significance for advancing the treatment of thrombocytopenia.
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Affiliation(s)
- Yimiao Liang
- Collage of Biological Engineering, Chongqing University, Chongqing 400044, China.
| | - Yang Li
- The Lepu Medical Co., LTD of Chongqing, China
| | - Rui Ma
- Northeast Branch of State Grid Corporation of China, Shenyang 110170, China
| | - Chuanren Duan
- Collage of Biological Engineering, Chongqing University, Chongqing 400044, China
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10
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Scharte J, Hassa S, Herrfurth C, Feussner I, Forlani G, Weis E, von Schaewen A. Metabolic priming in G6PDH isoenzyme-replaced tobacco lines improves stress tolerance and seed yields via altering assimilate partitioning. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 116:1696-1716. [PMID: 37713307 DOI: 10.1111/tpj.16460] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 08/25/2023] [Accepted: 08/29/2023] [Indexed: 09/17/2023]
Abstract
We investigated the basis for better performance of transgenic Nicotiana tabacum plants with G6PDH-isoenzyme replacement in the cytosol (Xanthi::cP2::cytRNAi, Scharte et al., 2009). After six generations of selfing, infiltration of Phytophthora nicotianae zoospores into source leaves confirmed that defence responses (ROS, callose) are accelerated, showing as fast cell death of the infected tissue. Yet, stress-related hormone profiles resembled susceptible Xanthi and not resistant cultivar SNN, hinting at mainly metabolic adjustments in the transgenic lines. Leaves of non-stressed plants contained twofold elevated fructose-2,6-bisphosphate (F2,6P2 ) levels, leading to partial sugar retention (soluble sugars, starch) and elevated hexose-to-sucrose ratios, but also more lipids. Above-ground biomass lay in between susceptible Xanthi and resistant SNN, with photo-assimilates preferentially allocated to inflorescences. Seeds were heavier with higher lipid-to-carbohydrate ratios, resulting in increased harvest yields - also under water limitation. Abiotic stress tolerance (salt, drought) was improved during germination, and in floated leaf disks of non-stressed plants. In leaves of salt-watered plants, proline accumulated to higher levels during illumination, concomitant with efficient NADP(H) use and recycling. Non-stressed plants showed enhanced PSII-induction kinetics (upon dark-light transition) with little differences at the stationary phase. Leaf exudates contained 10% less sucrose, similar amino acids, but more fatty acids - especially in the light. Export of specific fatty acids via the phloem may contribute to both, earlier flowering and higher seed yields of the Xanthi-cP2 lines. Apparently, metabolic priming by F2,6P2 -combined with sustained NADP(H) turnover-bypasses the genetically fixed growth-defence trade-off, rendering tobacco plants more stress-resilient and productive.
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Affiliation(s)
- Judith Scharte
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
| | - Sebastian Hassa
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
| | - Cornelia Herrfurth
- Albrecht-von-Haller-Institut für Pflanzenwissenschaften and Göttinger Zentrum für Molekulare Biowissenschaften (GZMB), Abteilung Biochemie der Pflanze, Universität Göttingen, Justus-von-Liebig-Weg 11, D-37077, Göttingen, Germany
| | - Ivo Feussner
- Albrecht-von-Haller-Institut für Pflanzenwissenschaften and Göttinger Zentrum für Molekulare Biowissenschaften (GZMB), Abteilung Biochemie der Pflanze, Universität Göttingen, Justus-von-Liebig-Weg 11, D-37077, Göttingen, Germany
| | - Giuseppe Forlani
- Laboratorio di Fisiologia e Biochimica Vegetale, Dipartimento di Scienze della Vita e Biotecnologie, Universitá degli Studi di Ferrara, Via L. Borsari 46, I-44121, Ferrara, Italy
| | - Engelbert Weis
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
| | - Antje von Schaewen
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
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11
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d'Aquino AI, Maikawa CL, Nguyen LT, Lu K, Hall IA, Jons CK, Kasse CM, Yan J, Prossnitz AN, Chang E, Baker SW, Hovgaard L, Steensgaard DB, Andersen HB, Simonsen L, Appel EA. Use of a biomimetic hydrogel depot technology for sustained delivery of GLP-1 receptor agonists reduces burden of diabetes management. Cell Rep Med 2023; 4:101292. [PMID: 37992687 PMCID: PMC10694761 DOI: 10.1016/j.xcrm.2023.101292] [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: 03/16/2023] [Revised: 08/02/2023] [Accepted: 10/23/2023] [Indexed: 11/24/2023]
Abstract
Glucagon-like peptide-1 (GLP-1) is an incretin hormone and neurotransmitter secreted from intestinal L cells in response to nutrients to stimulate insulin and block glucagon secretion in a glucose-dependent manner. Long-acting GLP-1 receptor agonists (GLP-1 RAs) have become central to treating type 2 diabetes (T2D); however, these therapies are burdensome, as they must be taken daily or weekly. Technological innovations that enable less frequent administrations would reduce patient burden and increase patient compliance. Herein, we leverage an injectable hydrogel depot technology to develop a GLP-1 RA drug product capable of months-long GLP-1 RA delivery. Using a rat model of T2D, we confirm that one injection of hydrogel-based therapy sustains exposure of GLP-1 RA over 42 days, corresponding to a once-every-4-months therapy in humans. Hydrogel therapy maintains management of blood glucose and weight comparable to daily injections of a leading GLP-1 RA drug. This long-acting GLP-1 RA treatment is a promising therapy for more effective T2D management.
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Affiliation(s)
- Andrea I d'Aquino
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94025, USA
| | - Caitlin L Maikawa
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Leslee T Nguyen
- Department of Biochemistry, Stanford University, Palo Alto, CA 94305, USA
| | - Katie Lu
- Department of Biology, Stanford University, Stanford, CA 94305, USA
| | - Ian A Hall
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Carolyn K Jons
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94025, USA
| | - Catherine M Kasse
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94025, USA
| | - Jerry Yan
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Alexander N Prossnitz
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94025, USA
| | - Enmian Chang
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94025, USA
| | - Sam W Baker
- Department of Comparative Medicine, Stanford University, Palo Alto, CA 94305, USA
| | - Lars Hovgaard
- Department of Biophysics and Formulations, Global Research Technologies, Novo Nordisk Park, 2760 Maaloev, Denmark
| | - Dorte B Steensgaard
- Department of Biophysics and Formulations, Global Research Technologies, Novo Nordisk Park, 2760 Maaloev, Denmark
| | - Hanne B Andersen
- Department of Biophysics and Formulations, Global Research Technologies, Novo Nordisk Park, 2760 Maaloev, Denmark
| | - Lotte Simonsen
- Department of Obesity Research, Global Drug Discovery, Novo Nordisk Park, 2760 Maaloev, Denmark
| | - Eric A Appel
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94025, USA; Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Department of Pediatrics (Endocrinology), Stanford University, Stanford, CA 94305, USA; Woods Institute for the Environment, Stanford University, Stanford, CA 94305, USA.
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12
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Wilkins AA, Schwarz B, Torres-Escobar A, Castore R, Landry L, Latimer B, Bohrnsen E, Bosio CM, Dragoi AM, Ivanov SS. The intracellular growth of the vacuolar pathogen Legionella pneumophila is dependent on the acyl chain composition of host membranes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.19.567753. [PMID: 38045297 PMCID: PMC10690232 DOI: 10.1101/2023.11.19.567753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Legionella pneumophila is an accidental human bacterial pathogen that infects and replicates within alveolar macrophages causing a severe atypical pneumonia known as Legionnaires' disease. As a prototypical vacuolar pathogen L. pneumophila establishes a unique endoplasmic reticulum (ER)-derived organelle within which bacterial replication takes place. Bacteria-derived proteins are deposited in the host cytosol and in the lumen of the pathogen-occupied vacuole via a type IVb (T4bSS) and a type II (T2SS) secretion system respectively. These secretion system effector proteins manipulate multiple host functions to facilitate intracellular survival of the bacteria. Subversion of host membrane glycerophospholipids (GPLs) by the internalized bacteria via distinct mechanisms feature prominently in trafficking and biogenesis of the Legionella -containing vacuole (LCV). Conventional GPLs composed of a glycerol backbone linked to a polar headgroup and esterified with two fatty acids constitute the bulk of membrane lipids in eukaryotic cells. The acyl chain composition of GPLs dictates phase separation of the lipid bilayer and therefore determines the physiochemical properties of biological membranes - such as membrane disorder, fluidity and permeability. In mammalian cells, fatty acids esterified in membrane GPLs are sourced endogenously from de novo synthesis or via internalization from the exogenous pool of lipids present in serum and other interstitial fluids. Here, we exploited the preferential utilization of exogenous fatty acids for GPL synthesis by macrophages to reprogram the acyl chain composition of host membranes and investigated its impact on LCV homeostasis and L. pneumophila intracellular replication. Using saturated fatty acids as well as cis - and trans - isomers of monounsaturated fatty acids we discovered that under conditions promoting lipid packing and membrane rigidification L. pneumophila intracellular replication was significantly reduced. Palmitoleic acid - a C16:1 monounsaturated fatty acid - that promotes membrane disorder when enriched in GPLs significantly increased bacterial replication within human and murine macrophages but not in axenic growth assays. Lipidome analysis of infected macrophages showed that treatment with exogenous palmitoleic acid resulted in membrane acyl chain reprogramming in a manner that promotes membrane disorder and live-cell imaging revealed that the consequences of increasing membrane disorder impinge on several LCV homeostasis parameters. Collectively, we provide experimental evidence that L. pneumophila replication within its intracellular niche is a function of the lipid bilayer disorder and hydrophobic thickness.
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13
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Starnes HM, Jackson TW, Rock KD, Belcher SM. Quantitative Cross-Species Comparison of Serum Albumin Binding of Per- and Polyfluoroalkyl Substances from Five Structural Classes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.10.566613. [PMID: 38014292 PMCID: PMC10680784 DOI: 10.1101/2023.11.10.566613] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are a class of over 8,000 chemicals that are persistent, bioaccumulative, and toxic to humans, livestock, and wildlife. Serum protein binding affinity is instrumental in understanding PFAS toxicity, yet experimental binding data is limited to only a few PFAS congeners. Previously, we demonstrated the usefulness of a high-throughput, in vitro differential scanning fluorimetry assay for determination of relative binding affinities of human serum albumin for 24 PFAS congeners from 6 chemical classes. In the current study, we used this differential scanning fluorimetry assay to comparatively examine differences in human, bovine, porcine, and rat serum albumin binding of 8 structurally informative PFAS congeners from 5 chemical classes. With the exception of the fluorotelomer alcohol 1H,1H,2H,2H-perfluorooctanol (6:2 FTOH), each PFAS congener bound by human serum albumin was also bound by bovine, porcine, and rat serum albumin. The critical role of the charged functional headgroup in albumin binding was supported by the inability of serum albumin of each species tested to bind 6:2 FTOH. Significant interspecies differences in serum albumin binding affinities were identified for each of the bound PFAS congeners. Relative to human albumin, perfluoroalkyl carboxylic and sulfonic acids were bound with greater affinity by porcine and rat serum albumin, and perfluoroalkyl ether congeners bound with lower affinity to porcine and bovine serum albumin. These comparative affinity data for PFAS binding by serum albumin from human, experimental model and livestock species reduce critical interspecies uncertainty and improve accuracy of predictive toxicity assessments for PFAS.
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Affiliation(s)
- Hannah M. Starnes
- Department of Biological Sciences, North Carolina State University, 127 David Clark Labs Campus Box 7617, Raleigh, NC 27607, USA
| | - Thomas W. Jackson
- Department of Biological Sciences, North Carolina State University, 127 David Clark Labs Campus Box 7617, Raleigh, NC 27607, USA
- Current address: Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Kylie D. Rock
- Department of Biological Sciences, North Carolina State University, 127 David Clark Labs Campus Box 7617, Raleigh, NC 27607, USA
- Current address: Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA
| | - Scott M. Belcher
- Department of Biological Sciences, North Carolina State University, 127 David Clark Labs Campus Box 7617, Raleigh, NC 27607, USA
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14
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Tomioka Y, Nagatoishi S, Nakagawa M, Tsumoto K, Arakawa T, Akuta T. Ferguson plot analysis of multiple intermediate species of thermally unfolded bovine serum albumin. Biophys Chem 2023; 301:107095. [PMID: 37611350 DOI: 10.1016/j.bpc.2023.107095] [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: 05/17/2023] [Revised: 07/28/2023] [Accepted: 08/14/2023] [Indexed: 08/25/2023]
Abstract
Ferguson plot was used to characterize the multiple intermediate species of bovine serum albumin (BSA) upon thermal unfolding. Differential scanning calorimetry showed an irreversible melting of BSA in Tris-HCl and phosphate buffers with a mid-transition temperature, Tm, of ∼68 °C. Thermally unfolded BSA was analyzed by agarose native gel electrophoresis stained by Coomassie blue and SYPRO Orange staining as a function of pH or protein concentration. SYPRO Orange was used to stain unfolded proteins. BSA heated at 70 and 80 °C, i.e., above the Tm, formed multiple intermediate species, which depended on the pH between 7.0 and 8.0, protein concentration and which buffer was used. These intermediate species were analyzed by Ferguson plot, which showed that BSA heated at 60 °C had a similar size to the native BSA, indicating that they are either native or native-like state consistent with no SYPRO Orange staining. The intermediate species observed at higher temperatures with the mobility less than that of the native BSA showed a steeper Ferguson plot and were stained by SYPRO Orange, indicating that these species had a larger hydrodynamic size than the native BSA and were unfolded.
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Affiliation(s)
- Yui Tomioka
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd., 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki 318-0004, Japan.
| | - Satoru Nagatoishi
- The Institute of Medical Sciences, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.
| | - Masataka Nakagawa
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd., 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki 318-0004, Japan.
| | - Kouhei Tsumoto
- The Institute of Medical Sciences, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan; School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Tsutomu Arakawa
- Alliance Protein Laboratories, 13380 Pantera Rd, San Diego, CA 92130, USA.
| | - Teruo Akuta
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd., 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki 318-0004, Japan.
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15
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Ullah A, Shin G, Lim SI. Human serum albumin binders: A piggyback ride for long-acting therapeutics. Drug Discov Today 2023; 28:103738. [PMID: 37591409 DOI: 10.1016/j.drudis.2023.103738] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 07/29/2023] [Accepted: 08/10/2023] [Indexed: 08/19/2023]
Abstract
Human serum albumin (HSA) is the most abundant protein in the blood and has desirable properties as a drug carrier. One of the most promising ways to exploit HSA as a carrier is to append an albumin-binding moiety (ABM) to a drug for in situ HSA binding upon administration. Nature- and library-derived ABMs vary in size, affinity, and epitope, differentially improving the pharmacokinetics of an appended drug. In this review, we evaluate the current state of knowledge regarding various aspects of ABMs and the unique advantages of ABM-mediated drug delivery. Furthermore, we discuss how ABMs can be specifically modulated to maximize potential benefits in clinical development.
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Affiliation(s)
- Aziz Ullah
- Department of Chemical Engineering, Pukyong National University, Busan 48513, Republic of Korea; Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, Dera Ismail Khan 29050, Khyber Pakhtunkhwa, Pakistan
| | - Goeun Shin
- Department of Chemical Engineering, Pukyong National University, Busan 48513, Republic of Korea; Nbios Inc, 7, Jukheon-gil, Gangneung-si, Gangwon-do, Republic of Korea
| | - Sung In Lim
- Department of Chemical Engineering, Pukyong National University, Busan 48513, Republic of Korea; Marine BioResource Co., Ltd., 365, Sinseon-ro, Nam-gu, Busan 48548, Republic of Korea.
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16
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Dittmar JW, Teplensky MH, Evangelopoulos M, Qin L, Zhang B, Mirkin CA. Tuning DNA Dissociation from Spherical Nucleic Acids for Enhanced Immunostimulation. ACS NANO 2023; 17:17996-18007. [PMID: 37713675 PMCID: PMC10801821 DOI: 10.1021/acsnano.3c04333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/17/2023]
Abstract
The stability of the core can significantly impact the therapeutic effectiveness of liposome-based drugs. While the spherical nucleic acid (SNA) architecture has elevated liposomal stability to increase therapeutic efficacy, the chemistry used to anchor the DNA to the liposome core is an underexplored design parameter with a potentially widespread biological impact. Herein, we explore the impact of SNA anchoring chemistry on immunotherapeutic function by systematically studying the importance of hydrophobic dodecane anchoring groups in attaching DNA strands to the liposome core. By deliberately modulating the size of the oligomer that defines the anchor, a library of structures has been established. These structures, combined with in vitro and in vivo immune stimulation analyses, elucidate the relationships between and importance of anchoring strength and dissociation of DNA from the SNA shell on its biological properties. Importantly, the most stable dodecane anchor, (C12)9, is superior to the n = 4-8 and 10 structures and quadruples immune stimulation compared to conventional cholesterol-anchored SNAs. When the OVA1 peptide antigen is encapsulated by the (C12)9 SNA and used as a therapeutic vaccine in an E.G7-OVA tumor model, 50% of the mice survived the initial tumor, and all of those survived tumor rechallenge. Importantly, the strong innate immune stimulation does not cause a cytokine storm compared to linear immunostimulatory DNA. Moreover, a (C12)9 SNA that encapsulates a peptide targeting SARS-CoV-2 generates a robust T cell response; T cells raised from SNA treatment kill >40% of target cells pulsed with the same peptide and ca. 45% of target cells expressing the entire spike protein. This work highlights the importance of using anchor chemistry to elevate SNA stability to achieve more potent and safer immunotherapeutics in the context of both cancer and infectious disease.
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Affiliation(s)
- Jasper W Dittmar
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Michelle H Teplensky
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Michael Evangelopoulos
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Lei Qin
- Department of Medicine, Division of Hematology and Oncology, Northwestern University, 420 E Superior Street, Chicago, Illinois 60611, United States
| | - Bin Zhang
- Department of Medicine, Division of Hematology and Oncology, Northwestern University, 420 E Superior Street, Chicago, Illinois 60611, United States
| | - Chad A Mirkin
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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17
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Haeri H, Eisermann J, Schimm H, Büscher A, Hoyer P, Hinderberger D. Profound Changes in Functional Structure and Dynamics of Serum Albumin in Children with Nephrotic Syndrome: An Exploratory Research Study. J Med Chem 2023; 66:12115-12129. [PMID: 37648246 PMCID: PMC10510392 DOI: 10.1021/acs.jmedchem.3c00680] [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: 04/14/2023] [Indexed: 09/01/2023]
Abstract
Patients with nephrotic syndrome (NS) suffer from urinary loss of albumin. As a cause, previous studies focused on the glomerular filter rather than analyzing the molecular properties of albumin itself. Later one was initiated by clinical observations indicating unexplained molecular alterations of human serum albumin (HSA) in an NS pediatric patient. Therefore, we examined serum from eight pediatric patients with steroid-sensitive and -resistant NS and compared it with serum from healthy subjects as well as commercial HSA. We used dynamic and electrophoretic light scattering to characterize the protein size and effective surface charge and electron paramagnetic resonance spectroscopy to measure the local environment and binding dynamics of up to seven fatty acids associated with HSA. Our findings suggest that pronounced differences in binding behavior and surface charge of HSA could enhance their filtration through the GBM, leading to direct toxicity of HSA to podocytes.
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Affiliation(s)
- Haleh
H. Haeri
- Physical
Chemistry, Complex Self-Organizing Systems, Martin Luther University
Halle-Wittenberg, Institute of Chemistry, Von Danckelmann-Platz 4, 06120 Halle (Saale), Germany
| | - Jana Eisermann
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, 82 Wood Ln, W12 0BZ London, U.K.
| | - Heike Schimm
- Physical
Chemistry, Complex Self-Organizing Systems, Martin Luther University
Halle-Wittenberg, Institute of Chemistry, Von Danckelmann-Platz 4, 06120 Halle (Saale), Germany
| | - Anja Büscher
- Universitätsklinikum
Essen (AöR), Klinik für Kinderheilkunde II, Zentrum
für Kinder- und Jugendmedizin, Hufelandstraße 55, D-45147 Essen, Germany
| | - Peter Hoyer
- Universitätsklinikum
Essen (AöR), Klinik für Kinderheilkunde II, Zentrum
für Kinder- und Jugendmedizin, Hufelandstraße 55, D-45147 Essen, Germany
| | - Dariush Hinderberger
- Physical
Chemistry, Complex Self-Organizing Systems, Martin Luther University
Halle-Wittenberg, Institute of Chemistry, Von Danckelmann-Platz 4, 06120 Halle (Saale), Germany
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18
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Rudge JD. The Lipid Invasion Model: Growing Evidence for This New Explanation of Alzheimer's Disease. J Alzheimers Dis 2023:JAD221175. [PMID: 37302030 PMCID: PMC10357195 DOI: 10.3233/jad-221175] [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: 06/12/2023]
Abstract
The Lipid Invasion Model (LIM) is a new hypothesis for Alzheimer's disease (AD) which argues that AD is a result of external lipid invasion to the brain, following damage to the blood-brain barrier (BBB). The LIM provides a comprehensive explanation of the observed neuropathologies associated with the disease, including the lipid irregularities first described by Alois Alzheimer himself, and accounts for the wide range of risk factors now identified with AD, all of which are also associated with damage to the BBB. This article summarizes the main arguments of the LIM, and new evidence and arguments in support of it. The LIM incorporates and extends the amyloid hypothesis, the current main explanation of the disease, but argues that the greatest cause of late-onset AD is not amyloid-β (Aβ) but bad cholesterol and free fatty acids, let into the brain by a damaged BBB. It suggests that the focus on Aβ is the reason why we have made so little progress in treating the disease in the last 30 years. As well as offering new perspectives for further research into the diagnosis, prevention, and treatment of AD, based on protecting and repairing the BBB, the LIM provides potential new insights into other neurodegenerative diseases such as Parkinson's disease and amyotrophic lateral sclerosis/motor neuron disease.
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19
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Abstract
In order for successful fecal-oral transmission, enteric bacterial pathogens have to successfully compete with the intestinal microbiota and reach high concentrations during infection. Vibrio cholerae requires cholera toxin (CT) to cause diarrheal disease, which is thought to promote the fecal-oral transmission of the pathogen. Besides inducing diarrheal disease, the catalytic activity of CT also alters host intestinal metabolism, which promotes the growth of V. cholerae during infection through the acquisition of host-derived nutrients. Furthermore, recent studies have found that CT-induced disease activates a niche-specific suite of V. cholerae genes during infection, some of which may be important for fecal-oral transmission of the pathogen. Our group is currently exploring the concept that CT-induced disease promotes the fecal-oral transmission of V. cholerae by modulating both host and pathogen metabolism. Furthermore, the role of the intestinal microbiota in pathogen growth and transmission during toxin-induced disease merits further investigation. These studies open the door to investigating whether other bacterial toxins also enhance pathogen growth and transmission during infection, which may shed light on the design of novel therapeutics for intervention or prevention of diarrheal diseases.
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Affiliation(s)
- Claire M. L. Chapman
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California, San Diego, La Jolla, California, USA
- Department of Molecular Biology, School of Biological Sciences, University of California, San Diego, La Jolla, California, USA
| | - Andrew Kapinos
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California, San Diego, La Jolla, California, USA
- Department of Molecular Biology, School of Biological Sciences, University of California, San Diego, La Jolla, California, USA
| | - Fabian Rivera-Chávez
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California, San Diego, La Jolla, California, USA
- Department of Molecular Biology, School of Biological Sciences, University of California, San Diego, La Jolla, California, USA
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20
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Gunn KH, Neher SB. Structure of dimeric lipoprotein lipase reveals a pore adjacent to the active site. Nat Commun 2023; 14:2569. [PMID: 37142573 PMCID: PMC10160067 DOI: 10.1038/s41467-023-38243-9] [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: 11/11/2022] [Accepted: 04/24/2023] [Indexed: 05/06/2023] Open
Abstract
Lipoprotein lipase (LPL) hydrolyzes triglycerides from circulating lipoproteins, releasing free fatty acids. Active LPL is needed to prevent hypertriglyceridemia, which is a risk factor for cardiovascular disease (CVD). Using cryogenic electron microscopy (cryoEM), we determined the structure of an active LPL dimer at 3.9 Å resolution. This structure reveals an open hydrophobic pore adjacent to the active site residues. Using modeling, we demonstrate that this pore can accommodate an acyl chain from a triglyceride. Known LPL mutations that lead to hypertriglyceridemia localize to the end of the pore and cause defective substrate hydrolysis. The pore may provide additional substrate specificity and/or allow unidirectional acyl chain release from LPL. This structure also revises previous models on how LPL dimerizes, revealing a C-terminal to C-terminal interface. We hypothesize that this active C-terminal to C-terminal conformation is adopted by LPL when associated with lipoproteins in capillaries.
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Affiliation(s)
- Kathryn H Gunn
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Saskia B Neher
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599, USA.
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21
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Zessin M, Meleshin M, Hilscher S, Schiene-Fischer C, Barinka C, Jung M, Schutkowski M. Continuous Fluorescent Sirtuin Activity Assay Based on Fatty Acylated Lysines. Int J Mol Sci 2023; 24:ijms24087416. [PMID: 37108579 PMCID: PMC10138348 DOI: 10.3390/ijms24087416] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/06/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Lysine deacetylases, like histone deacetylases (HDACs) and sirtuins (SIRTs), are involved in many regulatory processes such as control of metabolic pathways, DNA repair, and stress responses. Besides robust deacetylase activity, sirtuin isoforms SIRT2 and SIRT3 also show demyristoylase activity. Interestingly, most of the inhibitors described so far for SIRT2 are not active if myristoylated substrates are used. Activity assays with myristoylated substrates are either complex because of coupling to enzymatic reactions or time-consuming because of discontinuous assay formats. Here we describe sirtuin substrates enabling direct recording of fluorescence changes in a continuous format. Fluorescence of the fatty acylated substrate is different when compared to the deacylated peptide product. Additionally, the dynamic range of the assay could be improved by the addition of bovine serum albumin, which binds the fatty acylated substrate and quenches its fluorescence. The main advantage of the developed activity assay is the native myristoyl residue at the lysine side chain avoiding artifacts resulting from the modified fatty acyl residues used so far for direct fluorescence-based assays. Due to the extraordinary kinetic constants of the new substrates (KM values in the low nM range, specificity constants between 175,000 and 697,000 M-1s-1) it was possible to reliably determine the IC50 and Ki values for different inhibitors in the presence of only 50 pM of SIRT2 using different microtiter plate formats.
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Affiliation(s)
- Matthes Zessin
- Department of Medicinal Chemistry, Institute of Pharmacy, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
| | - Marat Meleshin
- Department of Enzymology, Charles Tanford Protein Center, Institute of Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
| | - Sebastian Hilscher
- Department of Medicinal Chemistry, Institute of Pharmacy, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
| | - Cordelia Schiene-Fischer
- Department of Enzymology, Charles Tanford Protein Center, Institute of Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
| | - Cyril Barinka
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Prumyslova 595, 25250 Vestec, Czech Republic
| | - Manfred Jung
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstraße 25, 79104 Freiburg, Germany
| | - Mike Schutkowski
- Department of Enzymology, Charles Tanford Protein Center, Institute of Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
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22
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Crisalli AM, Cai A, Cho BP. Probing the Interactions of Perfluorocarboxylic Acids of Various Chain Lengths with Human Serum Albumin: Calorimetric and Spectroscopic Investigations. Chem Res Toxicol 2023; 36:703-713. [PMID: 37001030 PMCID: PMC11091765 DOI: 10.1021/acs.chemrestox.3c00011] [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] [Indexed: 04/03/2023]
Abstract
Despite an exponential increase in PFAS research over the past two decades, the mechanisms behind how PFAS cause adverse health effects are still poorly understood. Protein interactions are considered a significant driver of bioaccumulation and subsequent toxicity from re-exposure; however, most of the available literature is limited to legacy PFAS. We utilized microcalorimetric and spectroscopic methods to systematically investigate the binding between human serum albumin (HSA) and perfluorocarboxylic acids (PFCAs) of varying chain lengths and their nonfluorinated fatty acid (FA) counterparts. The results reveal the optimal chain length for significant PFCA-HSA binding and some fundamental interactions, i.e., the polar carboxylic head of PFCA is countered by ionizable amino acids such as arginine, and the fluorocarbon tails stabilized by hydrophobic residues like leucine and valine. Additionally, fluorine's unique polarizability contributes to PFCA's stronger binding affinities relative to the corresponding fatty acids. Based on these observations, we posit that PFCAs likely bind to HSA in a "cavity-filling" manner, provided they have an appropriate size and shape to accommodate the electrostatic interactions. The results reported herein widen the pool of structural information to explain PFAS bioaccumulation patterns and toxicity and support the development of more accurate computational modeling of protein-PFAS interactions. TOC graphic created with Biorender.com.
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Affiliation(s)
- Alicia M Crisalli
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Ang Cai
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Bongsup P Cho
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, Rhode Island 02881, United States
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23
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Coppo L, Scheggi S, DeMontis G, Priora R, Frosali S, Margaritis A, Summa D, Di Giuseppe D, Ulivelli M, Di Simplicio P. Does Risk of Hyperhomocysteinemia Depend on Thiol-Disulfide Exchange Reactions of Albumin and Homocysteine? Antioxid Redox Signal 2023; 38:920-958. [PMID: 36352822 DOI: 10.1089/ars.2021.0269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Significance: Increased plasma concentrations of total homocysteine (tHcy; mild-moderate hyperhomocysteinemia: 15-50 μM tHcy) are considered an independent risk factor for the onset/progression of various diseases, but it is not known about how the increase in tHcy causes pathological conditions. Recent Advances: Reduced homocysteine (HSH ∼1% of tHcy) is presumed to be toxic, unlike homocystine (∼9%) and mixed disulfide between homocysteine and albumin (HSS-ALB; homocysteine [Hcy]-albumin mixed disulfide, ∼90%). This and other notions make it difficult to explain the pathogenicity of Hcy because: (i) lowering tHcy does not improve pathological outcomes; (ii) damage due to HSH usually emerges at supraphysiological doses; and (iii) it is not known why tiny increments in plasma concentrations of HSH can be pathological. Critical Issues: Albumin may have a role in Hcy toxicity, because HSS-ALB could release toxic HSH via thiol-disulfide (SH/SS) exchange reactions in cells. Similarly, thiol-disulfide exchange processes of reduced albumin (albumin with free SH group of Cys34 [HS-ALB]) or N-homocysteinylated albumin are plausible alternatives for initiating Hcy pathological events. Adverse effects of albumin and other data reviewed here suggest the hypothesis of a role of albumin in Hcy toxicity. Future Directions: HSS-ALB might be involved in disruption of the antioxidant/oxidant balance in critical tissues (brain, liver, kidney). Since homocysteine-albumin mixed disulfide is a possible intermediate of thiol-disulfide exchange reactions, we suggest that homocysteinylated albumin could be a new pathological factor, and that studies on the redox role of albumin and mixed disulfide production via thiol-disulfide exchange reactions could offer new therapeutic insights for reducing Hcy toxicity.
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Affiliation(s)
- Lucia Coppo
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Simona Scheggi
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Graziella DeMontis
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Raffaella Priora
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Simona Frosali
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Antonio Margaritis
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Domenico Summa
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Danila Di Giuseppe
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Monica Ulivelli
- Department of Surgery, Medical Science and Neuroscience, University of Siena, Siena, Italy
| | - Paolo Di Simplicio
- Department of Molecular and Development Medicine and Medical Science and Neuroscience, University of Siena, Siena, Italy
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24
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Berganza E, Boltynjuk E, Mathew G, Vallejo FF, Gröger R, Scherer T, Sekula-Neuner S, Hirtz M. 3D Nanolithography by Means of Lipid Ink Spreading Inhibition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205590. [PMID: 36538752 DOI: 10.1002/smll.202205590] [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: 09/09/2022] [Revised: 11/30/2022] [Indexed: 06/17/2023]
Abstract
While patterning 2D metallic nanostructures are well established through different techniques, 3D printing still constitutes a major bottleneck on the way to device miniaturization. In this work a fluid phase phospholipid ink is used as a building block for structuring with dip-pen nanolithography. Following a bioinspired approach that relies on ink-spreading inhibition, two processes are presented to build 2D and 3D metallic structures. Serum albumin, a widely used protein with an innate capability to bind to lipids, is the key in both processes. Covering the sample surface with it prior to lipid writing, anchors lipids on the substrate, which ultimately allows the creation of highly stable 3D lipid-based scaffolds to build metallic structures.
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Affiliation(s)
- Eider Berganza
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Ines de la Cruz 3, 29048, Madrid, Spain
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Evgeniy Boltynjuk
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - George Mathew
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Fabio Fernando Vallejo
- Departamento de Ingeniería Mecánica y Mecatrónica, Universidad Nacional de Colombia, Cra 45, 111321, Bogotá, Colombia
| | - Roland Gröger
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Karlsruhe Institute of Technology (KIT), Institute of Applied Physics (APH), Wolfgang-Gaede-Straße 1, 76131, Karlsruhe, Germany
| | - Torsten Scherer
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Sylwia Sekula-Neuner
- n.able GmbH, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michael Hirtz
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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25
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Duran-Güell M, Garrabou G, Flores-Costa R, Casulleras M, López-Vicario C, Zhang IW, Cantó-Santos J, Contreras BJ, Sánchez-Rodríguez MB, Romero-Grimaldo B, Horrillo R, Costa M, Arroyo V, Clària J. Essential role for albumin in preserving liver cells from TNFα-induced mitochondrial injury. FASEB J 2023; 37:e22817. [PMID: 36809676 DOI: 10.1096/fj.202201526r] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 01/13/2023] [Accepted: 01/30/2023] [Indexed: 02/23/2023]
Abstract
Cytokine-induced inflammation and mitochondrial oxidative stress are key drivers of liver tissue injury. Here, we describe experiments modeling hepatic inflammatory conditions in which plasma leakage leads to large amounts of albumin to reach the interstitium and parenchymal surfaces to explore whether this protein plays a role in preserving hepatocyte mitochondria against the damaging actions of the cytotoxic cytokine tumor necrosis factor alpha (TNFα). Hepatocytes and precision-cut liver slices were cultured in the absence or presence of albumin in the cell media and then exposed to mitochondrial injury with the cytokine TNFα. The homeostatic role of albumin was also investigated in a mouse model of TNFα-mediated liver injury induced by lipopolysaccharide and D-galactosamine (LPS/D-gal). Mitochondrial ultrastructure, oxygen consumption, ATP and reactive oxygen species (ROS) generation, fatty acid β-oxidation (FAO), and metabolic fluxes were assessed by transmission electron microscopy (TEM), high-resolution respirometry, luminescence-fluorimetric-colorimetric assays and NADH/FADH2 production from various substrates, respectively. TEM analysis revealed that in the absence of albumin, hepatocytes were more susceptible to the damaging actions of TNFα and showed more round-shaped mitochondria with less intact cristae than hepatocytes cultured with albumin. In the presence of albumin in the cell media, hepatocytes also showed reduced mitochondrial ROS generation and FAO. The mitochondria protective actions of albumin against TNFα damage were associated with the restoration of a breakpoint between isocitrate and α-ketoglutarate in the tricarboxylic acid cycle and the upregulation of the antioxidant activating transcription factor 3 (ATF3). The involvement of ATF3 and its downstream targets was confirmed in vivo in mice with LPS/D-gal-induced liver injury, which showed increased hepatic glutathione levels, indicating a reduction in oxidative stress after albumin administration. These findings reveal that the albumin molecule is required for the effective protection of liver cells from mitochondrial oxidative stress induced by TNFα. These findings emphasize the importance of maintaining the albumin levels in the interstitial fluid within the normal range to protect the tissues against inflammatory injury in patients with recurrent hypoalbuminemia.
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Affiliation(s)
- Marta Duran-Güell
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Grifols Chair, European Foundation for the Study of Chronic Liver Failure (EF CLIF), Barcelona, Spain
| | - Glòria Garrabou
- Muscle Research and Mitochondrial Function Laboratory, Cellex-IDIBAPS, Faculty of Medicine and Health Sciences, Internal Medicine Department, University of Barcelona, Hospital Clínic, Barcelona, Spain.,CIBERer, Barcelona, Spain
| | - Roger Flores-Costa
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Grifols Chair, European Foundation for the Study of Chronic Liver Failure (EF CLIF), Barcelona, Spain
| | - Mireia Casulleras
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Grifols Chair, European Foundation for the Study of Chronic Liver Failure (EF CLIF), Barcelona, Spain
| | - Cristina López-Vicario
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Grifols Chair, European Foundation for the Study of Chronic Liver Failure (EF CLIF), Barcelona, Spain.,CIBERehd, Barcelona, Spain
| | - Ingrid W Zhang
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Grifols Chair, European Foundation for the Study of Chronic Liver Failure (EF CLIF), Barcelona, Spain
| | - Judith Cantó-Santos
- Muscle Research and Mitochondrial Function Laboratory, Cellex-IDIBAPS, Faculty of Medicine and Health Sciences, Internal Medicine Department, University of Barcelona, Hospital Clínic, Barcelona, Spain.,CIBERer, Barcelona, Spain
| | - Bryan J Contreras
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain
| | | | - Berta Romero-Grimaldo
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain
| | | | | | - Vicente Arroyo
- Grifols Chair, European Foundation for the Study of Chronic Liver Failure (EF CLIF), Barcelona, Spain
| | - Joan Clària
- Biochemistry and Molecular Genetics Service, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Grifols Chair, European Foundation for the Study of Chronic Liver Failure (EF CLIF), Barcelona, Spain.,CIBERehd, Barcelona, Spain.,Department of Biomedical Sciences, University of Barcelona, Barcelona, Spain
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26
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Hirschmann F, Lopez H, Roosen-Runge F, Seydel T, Schreiber F, Oettel M. Effects of flexibility in coarse-grained models for bovine serum albumin and immunoglobulin G. J Chem Phys 2023; 158:084112. [PMID: 36859072 DOI: 10.1063/5.0132493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
We construct a coarse-grained, structure-based, low-resolution, 6-bead flexible model of bovine serum albumin (BSA, PDB: 4F5S), which is a popular example of a globular protein in biophysical research. The model is obtained via direct Boltzmann inversion using all-atom simulations of a single molecule, and its particular form is selected from a large pool of 6-bead coarse-grained models using two suitable metrics that quantify the agreement in the distribution of collective coordinates between all-atom and coarse-grained Brownian dynamics simulations of solutions in the dilute limit. For immunoglobulin G (IgG), a similar structure-based 12-bead model has been introduced in the literature [Chaudhri et al., J. Phys. Chem. B 116, 8045 (2012)] and is employed here to compare findings for the compact BSA molecule and the more anisotropic IgG molecule. We define several modified coarse-grained models of BSA and IgG, which differ in their internal constraints and thus account for a variation of flexibility. We study denser solutions of the coarse-grained models with purely repulsive molecules (achievable by suitable salt conditions) and address the effect of packing and flexibility on dynamic and static behavior. Translational and rotational self-diffusivity is enhanced for more elastic models. Finally, we discuss a number of effective sphere sizes for the BSA molecule, which can be defined from its static and dynamic properties. Here, it is found that the effective sphere diameters lie between 4.9 and 6.1 nm, corresponding to a relative spread of about ±10% around a mean of 5.5 nm.
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Affiliation(s)
- Frank Hirschmann
- Institute for Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - Hender Lopez
- School of Physics, Clinical and Optometric Sciences, Technological University Dublin, Grangegorman D07 ADY7, Ireland
| | - Felix Roosen-Runge
- Department of Biomedical Sciences and Biofilms-Research Center for Biointerfaces (BRCB), Malmö University, 20506 Malmö, Sweden
| | - Tilo Seydel
- Institut Max von Laue-Paul Langevin, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Frank Schreiber
- Institute for Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - Martin Oettel
- Institute for Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany
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27
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Dâ Aquino AI, Maikawa CL, Nguyen LT, Lu K, Hall IA, Prossnitz AN, Chang E, Baker SW, Kasse CM, Jons CK, Yan J, Hovgaard L, Steensgaard DB, Andersen HB, Simonsen L, Appel EA. Sustained Delivery of GLP-1 Receptor Agonists from Injectable Biomimetic Hydrogels Improves Treatment of Diabetes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.28.526057. [PMID: 36778223 PMCID: PMC9915491 DOI: 10.1101/2023.01.28.526057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Glucagon-like peptide-1 (GLP-1) is an incretin hormone and neurotransmitter secreted from intestinal L-cells in response to nutrients to stimulate insulin and block glucagon secretion in a glucose-dependent manner. GLP-1 in itself is rapidly degraded, but long-acting GLP-1 receptor agonists (GLP-1 RAs) have become central in the treatment of T2D because of the beneficial effects extending also beyond glucose control. Currently, these therapeutics must be injected either daily or weekly or taken daily orally, leaving room for technological innovations that enable less frequent administrations, which will reduce patient burden and increase patient compliance. An ideal GLP-1 RA drug product would provide continuous therapy for upwards of four months from a single administration to match the cadence with which T2D patients typically visit their physician. In this work, we leveraged an injectable hydrogel depot technology to develop a long-acting GLP-1 RA drug product. By modulating the hydrogel properties to tune GLP-1 RA retention within the hydrogel depot, we engineered formulations capable of months-long GLP-1 RA delivery. Using a rat model of T2D, we confirmed that a single injection of hydrogel-based therapies exhibits sustained exposure of GLP-1 RA over 42 days, corresponding to a once-every four month therapy in humans. Moreover, these hydrogel therapies maintained optimal management of blood glucose and weight comparable to daily injections of a leading GLP-1 RA drug molecule. The pharmacokinetics and pharmacodynamics of these hydrogel-based long-acting GLP-1 RA treatments are promising for development of novel therapies reducing treatment burden for more effective management of T2D.
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28
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Sun Y, Yu D, Geng X, Ding D, Yang Y, Liu Z, Xiao Z, Wang R, Tan W. Artificial Base-Directed In Vivo Assembly of an Albumin-siRNA Complex for Tumor-Targeting Delivery. ACS APPLIED MATERIALS & INTERFACES 2023; 15:8872-8883. [PMID: 36751121 DOI: 10.1021/acsami.2c19075] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
RNA interference (RNAi) mediated by short interfering RNA (siRNA) is a promising method for cancer treatment, but the clinical application is hampered by several limitations, including metabolic instability, lack of tumor specificity, and poor cellular uptake. To meet these challenges, we have explored the possibility of structure modification of siRNA with artificial bases for property optimization. A series of siRNAs functionalized with different numbers of hydrophobic base F are prepared for screening. The interactions of plasma proteins with F-base-modified siRNA (F-siRNA) are investigated, and it is identified that the interaction with serum albumin is dominant. Experiments revealed that the introduction of F bases conferred modified siRNA with improved tumor-specific accumulation, prolonged circulatory retention time, and better tissue permeability. Mechanistic studies indicated that the F base induces the formulation of a stable siRNA-albumin complex, which transports siRNA to tumor tissues selectively owing to an enhanced permeability and retention (EPR) effect of albumin. The F base also facilitates the binding of siRNA to transport-associated proteins on the cell membrane, enabling its cellular internalization. Together, these data demonstrate that F base modification confers siRNA-enhanced cellular uptake and biostability and specific accumulation in tumor tissue, which provides a new approach for the development of siRNA-based cancer therapeutics.
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Affiliation(s)
- Yang Sun
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Die Yu
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xinyao Geng
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ding Ding
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yu Yang
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou 215123, Jiangsu, China
| | - Zeyu Xiao
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ruowen Wang
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Weihong Tan
- Institute of Molecular Medicine (IMM), Renji Hospital, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, Hunan, China
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), The Chinese Academy of Sciences, Hangzhou 310022, Zhejiang, China
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29
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Sharifi S, Böger M, Lortz S, Mehmeti I. Luminal H 2 O 2 promotes ER Ca 2+ dysregulation and toxicity of palmitate in insulin-secreting INS-1E cells. FASEB J 2023; 37:e22685. [PMID: 36468845 DOI: 10.1096/fj.202201237r] [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: 08/03/2022] [Revised: 11/07/2022] [Accepted: 11/21/2022] [Indexed: 12/12/2022]
Abstract
The endoplasmic reticulum (ER) lumen is not only the major site for the assembly and folding of newly synthesized proteins but also the main intracellular Ca2+ store. Ca2+ ions are involved in versatile biochemical processes, including posttranslational processing and folding of nascent proteins. Disruption of ER Ca2+ homeostasis is usually accompanied by an ER stress response that can ultimately lead to apoptosis if unresolved. Abnormal ER Ca2+ depletion has been linked to pancreatic β-cell dysfunction and death under lipotoxic conditions. However, the underlying mechanisms how the β-cell toxic saturated free fatty acid palmitate perturbs ER Ca2+ homeostasis and its interplay with other organelles are not fully understood. In the present study, we demonstrate that treatment of insulin-secreting INS-1E cells with palmitate diminished ER Ca2+ levels, elevated cytosolic/mitochondrial Ca2+ content, lowered the mitochondrial membrane potential, and ATP content. In addition, palmitate-pretreated β-cells contained significantly less luminal Ca2+ , revealed a severely impaired ER Ca2+ reuptake rate, and substantially lower insulin content. Importantly, detoxification of luminal H2 O2 by expression of the ER-resident glutathione peroxidase 8 (GPx8) abrogated the lipotoxic effects of palmitate. Moreover, GPx8 supported oxidative protein folding and preserved insulin content under lipotoxic conditions. A direct involvement of luminal H2 O2 in palmitate-mediated ER Ca2+ depletion could be corroborated by the ectopic expression of an ER-luminal active catalase. Our data point to the critical role of luminal H2 O2 in palmitate-mediated depletion of ER Ca2+ through redox-dependent impairment of Ca2+ ATPase pump activity upstream of mitochondrial dysfunction in insulin-secreting INS-1E cells.
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Affiliation(s)
- Sarah Sharifi
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Maren Böger
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Stephan Lortz
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
| | - Ilir Mehmeti
- Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany
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30
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Kurtzhals P, Østergaard S, Nishimura E, Kjeldsen T. Derivatization with fatty acids in peptide and protein drug discovery. Nat Rev Drug Discov 2023; 22:59-80. [PMID: 36002588 DOI: 10.1038/s41573-022-00529-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2022] [Indexed: 01/28/2023]
Abstract
Peptides and proteins are widely used to treat a range of medical conditions; however, they often have to be injected and their effects are short-lived. These shortcomings of the native structure can be addressed by molecular engineering, but this is a complex undertaking. A molecular engineering technology initially applied to insulin - and which has now been successfully applied to several biopharmaceuticals - entails the derivatization of peptides and proteins with fatty acids. Various protraction mechanisms are enabled by the specific characteristics and positions of the attached fatty acid. Furthermore, the technology can ensure a long half-life following oral administration of peptide drugs, can alter the distribution of peptides and may hold potential for tissue targeting. Due to the inherent safety and well-defined chemical nature of the fatty acids, this technology provides a versatile approach to peptide and protein drug discovery.
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31
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Zoeller MP, Hafiz S, Marx A, Erwin N, Fricker G, Carpenter JF. Exploring the Protein Stabilizing Capability of Surfactants Against Agitation Stress and the Underlying Mechanisms. J Pharm Sci 2022; 111:3261-3274. [PMID: 36096287 DOI: 10.1016/j.xphs.2022.09.004] [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: 05/30/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 01/05/2023]
Abstract
The application of surfactants in liquid protein formulation is a common practice to protect proteins from liquid-air interface-induced protein aggregation. Typically, Polysorbate 20 or 80 are used, but degradation of these surfactants can result in particle formation and/or protein degradation. The purpose of the current study was to directly compare three alternative protein stabilizing molecules - Poloxamer 188, hydroxypropyl-cyclodextrin and a trehalose-based surfactant - to Polysorbate 80 for their capacities to reduce agitation-induced protein aggregation and particle formation; and furthermore, investigate their underlying protein stabilizing mechanisms. To this end, a small-volume, rapid agitation stress approach was used to quantify the molecules' abilities to stabilize two model proteins. This assay was presented to be a powerful tool to screen the protein stabilizing capability of surfactants using minimum of material and time. SEC, turbidity measurements and particle analysis showed an efficient protein stabilization of all tested surfactants as well as cyclodextrin. STD-NMR and dynamic surface tension measurements indicated the competitive surface adsorption to be the main protein stabilizing mechanism of the three surfactants tested. It might also play a role to some extent in the protein stabilization by HPβCD. However, additional mechanisms might also contribute to protein stabilization leaving room for further investigations.
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Affiliation(s)
- Michelle Pascale Zoeller
- Merck KGaA, Darmstadt, Germany; Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Heidelberg, Germany
| | | | | | | | - Gert Fricker
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Heidelberg, Germany
| | - John F Carpenter
- University of Colorado Anschutz Medical Campus, Dept. of Pharmaceutical Sciences, Aurora, CO, USA.
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32
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Sasenick J, Kleinfeld A, Huber A, Oh W, Hegyi T, Weinberger B. Effects of lipid emulsions on unbound bilirubin and response to phototherapy in preterm infants. J Matern Fetal Neonatal Med 2022; 35:10395-10400. [PMID: 36176060 PMCID: PMC9852034 DOI: 10.1080/14767058.2022.2128656] [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: 04/14/2022] [Revised: 08/01/2022] [Accepted: 08/15/2022] [Indexed: 01/22/2023]
Abstract
OBJECTIVE Bilirubin-induced neurotoxicity is mediated by the fraction of total serum bilirubin (TSB) not bound to albumin (Bf). Unbound free fatty acids (FFAu) generated from lipid emulsions compete with bilirubin for albumin binding, increasing Bf. Soy-based (IL) and soy-MCT-olive-fish oil-based (SMOF) lipid emulsions contain different fatty acids with distinct albumin binding affinities. IL increases Bf in preterm infants, but the effects of SMOF on Bf are not known. Our objective was to compare changes in TSB, Bf, FFAu, and response to phototherapy in preterm infants receiving SMOF and IL. We hypothesized that SMOF would be associated with lower Bf and better response to phototherapy than IL. METHODS Very preterm and low birth weight infants (<1500 g, <32 weeks) were infused with IL (n = 20) or SMOF (n = 20) as prescribed by providers. Phototherapy was prescribed using the standard care practice. FFAu profiles and levels, TSB, and Bf were measured on 0, 1, 2, and 3 g/kg/day of lipid infusion and at the initiation and termination of phototherapy. TSB was analyzed in the clinical laboratory using the diazo technique. FFAu and Bf were measured using fluorescent probes. RESULTS Escalating doses of IL and SMOF increased FFAu levels and Bf, but not TSB. Phototherapy did not significantly decrease Bf for infants receiving either lipid. IL-treated infants had higher levels of unbound linoleic acid, and SMOF-treated infants had higher unbound arachidonic, oleic, and docosahexaenoic acids. CONCLUSIONS IL and SMOF both increase Bf similarly, and phototherapy does not significantly affect Bf for infants receiving them.
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Affiliation(s)
- Jonathan Sasenick
- Neonatal-Perinatal Medicine, Cohen Children’s Medical Center, Northwell Health and Zucker School of Medicine at Hofstra/Northwell, New Hyde Park, NY, United States
| | | | - Andrew Huber
- Fluoresprobe Sciences, San Diego, CA, United States
| | - William Oh
- Women and Infants Hospital and AdventHealth for Children, Providence, RI, United States
| | - Thomas Hegyi
- Pediatrics, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, United States
| | - Barry Weinberger
- Neonatal-Perinatal Medicine, Cohen Children’s Medical Center, Northwell Health and Zucker School of Medicine at Hofstra/Northwell, New Hyde Park, NY, United States
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Annevelink CE, Walker RE, Shearer GC. Esterified Oxylipins: Do They Matter? Metabolites 2022; 12:1007. [PMID: 36355090 PMCID: PMC9697791 DOI: 10.3390/metabo12111007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/17/2022] [Accepted: 10/19/2022] [Indexed: 10/25/2023] Open
Abstract
Oxylipins are oxygenated metabolites of fatty acids that share several similar biochemical characteristics and functions to fatty acids including transport and trafficking. Oxylipins are most commonly measured in the non-esterified form which can be found in plasma, free or bound to albumin. The non-esterified form, however, reflects only one of the possible pools of oxylipins and is by far the least abundant circulating form of oxylipins. Further, this fraction cannot reliably be extrapolated to the other, more abundant, esterified pool. In cells too, esterified oxylipins are the most abundant form, but are seldom measured and their potential roles in signaling are not well established. In this review, we examine the current literature on experimental oxylipin measurements to describe the lack in reporting the esterified oxylipin pool. We outline the metabolic and experimental importance of esterified oxylipins using well established roles of fatty acid trafficking in non-esterified fatty acids and in esterified form as components of circulating lipoproteins. Finally, we use mathematical modeling to simulate how exchange between cellular esterified and unesterified pools would affect intracellular signaling.. The explicit inclusion of esterified oxylipins along with the non-esterified pool has the potential to convey a more complete assessment of the metabolic consequences of oxylipin trafficking.
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Affiliation(s)
| | | | - Gregory C. Shearer
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA 16802, USA
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34
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Kruszewska N, Mazurkiewicz A, Szala G, Słomion M. Characterization of Synovial Fluid Components: Albumin-Chondroitin Sulfate Interactions Seen through Molecular Dynamics. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6935. [PMID: 36234275 PMCID: PMC9572199 DOI: 10.3390/ma15196935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/28/2022] [Accepted: 10/01/2022] [Indexed: 06/16/2023]
Abstract
The friction coefficient of articular cartilage (AC) is very low. A method of producing tailor-made materials with even similar lubrication properties is still a challenge. The physicochemical reasons for such excellent lubrication properties of AC are still not fully explained; however, a crucial factor seems to be synergy between synovial fluid (SF) components. As a stepping stone to being able to produce innovative materials characterized by a very low friction coefficient, we studied the interactions between two important components of SF: human serum albumin (HSA) and chondroitin sulfate (CS). The molecular dynamics method, preceded by docking, is used in the study. Interactions of HSA with two types of CS (IV and VI), with the addition of three types of ions often found in physiological solutions: Ca2+, Na+, and Mg2+, are compared. It was found that there were differences in the energy of binding values and interaction maps between CS-4 and CS-6 complexes. HSA:CS-4 complexes were bound stronger than in the case of HSA:CS-6 because more interactions were formed across all types of interactions except one-the only difference was for ionic bridges, which were more often found in HSA:CS-6 complexes. RMSD and RMSF indicated that complexes HSA:CS-4 behave much more stably than HSA:CS-6. The type of ions added to the solution was also very important and changed the interaction map. However, the biggest difference was caused by the addition of Ca2+ ions which were prone to form ionic bridges.
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Affiliation(s)
- Natalia Kruszewska
- Institute of Mathematics and Physics, Bydgoszcz University of Science and Technology, Kaliskiego 7 Street, 85-796 Bydgoszcz, Poland
| | - Adam Mazurkiewicz
- Faculty of Mechanical Engineering, Bydgoszcz University of Science and Technology, Kaliskiego 7 Street, 85-796 Bydgoszcz, Poland
| | - Grzegorz Szala
- Faculty of Mechanical Engineering, Bydgoszcz University of Science and Technology, Kaliskiego 7 Street, 85-796 Bydgoszcz, Poland
| | - Małgorzata Słomion
- Faculty of Management, Bydgoszcz University of Science and Technology, Kaliskiego 7 Street, 85-796 Bydgoszcz, Poland
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35
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Inoue N, Sakurai T, Yamamoto Y, Chiba H, Hui SP. Profiling of lysophosphatidylethanolamine molecular species in human serum and in silico prediction of the binding site on albumin. Biofactors 2022; 48:1076-1088. [PMID: 35686952 DOI: 10.1002/biof.1868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 05/08/2022] [Indexed: 11/07/2022]
Abstract
Lysophosphatidylethanolamine (LPE) is a major lysophospholipid produced by phospholipids and binds to human serum albumin (HSA). LPEs may play various roles in vivo depending on the differences in their acyl chains. However, only few reports have been published on the biological functions of LPEs. Hence, we determined the exact relative abundance of the major LPEs in the serum of healthy participants (n = 8) using liquid chromatography-tandem mass spectrometry. Consequently, LPE 18:2 (24.1 ± 5.2%) was found to be the most abundant in serum. To understand the distribution of LPEs, the serum separated via gel-filtration high-performance liquid chromatography was subjected to quantitative measurement. LPEs were more observed in the albumin fraction than the lipoprotein fraction. We also performed a fluorescence displacement assay and an in silico molecular docking experiment using AutoDock to confirm the affinity and binding sites of the LPEs on HSA. The binding affinities of the LPEs for drug sites 1 and 2 on HSA were relatively low, with Ki values of approximately 11 and 3.8 μM, respectively. AutoDock analysis revealed the conformation of the LPEs bound to drug sites and the possibility of LPEs binding to other HSA sites. These findings could help to elucidate the biological and pathological functions of LPEs.
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Affiliation(s)
- Nao Inoue
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | | | - Yusuke Yamamoto
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Hitoshi Chiba
- Department of Nutrition, Sapporo University of Health Sciences, Sapporo, Japan
| | - Shu-Ping Hui
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
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36
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Jaegers J, Haferkamp S, Arnolds O, Moog D, Wrobeln A, Nocke F, Cantore M, Pütz S, Hartwig A, Franzkoch R, Psathaki OE, Jastrow H, Schauerte C, Stoll R, Kirsch M, Ferenz KB. Deciphering the Emulsification Process to Create an Albumin-Perfluorocarbon-(o/w) Nanoemulsion with High Shelf Life and Bioresistivity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10351-10361. [PMID: 35969658 PMCID: PMC9435530 DOI: 10.1021/acs.langmuir.1c03388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 07/12/2022] [Indexed: 06/15/2023]
Abstract
This work aimed at the development of a stable albumin-perfluorocarbon (o/w) emulsion as an artificial oxygen carrier suitable for clinical application. So far, albumin-perfluorocarbon-(o/w) emulsions have been successfully applied in preclinical trials. Cross-linking a variety of different physical and chemical methods for the characterization of an albumin-perfluorocarbon (PFC)-(o/w) emulsion was necessary to gain a deep understanding of its specific emulsification processes during high-pressure homogenization. High-pressure homogenization is simple but incorporates complex physical reactions, with many factors influencing the formation of PFC droplets and their coating. This work describes and interprets the impact of albumin concentration, homogenization pressure, and repeated microfluidizer passages on PFC-droplet formation; its influence on storage stability; and the overcoming of obstacles in preparing stable nanoemulsions. The applied methods comprise dynamic light scattering, static light scattering, cryo- and non-cryo-scanning and transmission electron microscopies, nuclear magnetic resonance spectroscopy, light microscopy, amperometric oxygen measurements, and biochemical methods. The use of this wide range of methods provided a sufficiently comprehensive picture of this polydisperse emulsion. Optimization of PFC-droplet formation by means of temperature and pressure gradients results in an emulsion with improved storage stability (tested up to 5 months) that possibly qualifies for clinical applications. Adaptations in the manufacturing process strikingly changed the physical properties of the emulsion but did not affect its oxygen capacity.
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Affiliation(s)
- Johannes Jaegers
- University
of Duisburg-Essen, Institute of Physiology, University Hospital Essen, Hufelandstraße 55, 45122 Essen, Germany
- Department
of Biomedicine, Aarhus University, Høegh-Guldbergs Gade 10, bygning
1116, 8000 Aarhus
C, Denmark
| | - Sven Haferkamp
- SOLID-CHEM
GmbH, Universitätsstraße
136, 44799 Bochum, Germany
| | - Oliver Arnolds
- Biomolecular
Spectroscopy and RUBiospek|NMR, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | - Daniel Moog
- Pulveranalyse
Dipl.-Ing. Daniel Moog, Roitzheimer Str. 61, 53879 Euskirchen, Germany
| | - Anna Wrobeln
- University
of Duisburg-Essen, Institute of Physiology, University Hospital Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Fabian Nocke
- University
of Duisburg-Essen, Institute of Physiology, University Hospital Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Miriam Cantore
- University
of Duisburg-Essen, Institute of Physiology, University Hospital Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Stefanie Pütz
- Biomolecular
Spectroscopy and RUBiospek|NMR, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | - Anne Hartwig
- Physical
Chemistry-innoFSPEC and Potsdam Transfer, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Rico Franzkoch
- CellNanOs
(Center of Cellular Nanoanalytics), iBiOs (Integrated Bioimaging Facility), University of Osnabrück, Barbarastr. 11, 49076 Osnabrück, Germany
| | - Olympia Ekaterini Psathaki
- CellNanOs
(Center of Cellular Nanoanalytics), iBiOs (Integrated Bioimaging Facility), University of Osnabrück, Barbarastr. 11, 49076 Osnabrück, Germany
| | - Holger Jastrow
- Institute
of Anatomy, University of Duisburg-Essen, University Hospital Essen, Hufelandstr. 55, Essen D-45147, Germany
- Institute
for Experimental Immunology and Imaging, Imaging Center Essen, Electron
Microscopy Unit, University of Duisburg-Essen, Hufelandstr. 55, Essen D-45147, Germany
| | | | - Raphael Stoll
- Biomolecular
Spectroscopy and RUBiospek|NMR, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | - Michael Kirsch
- University
of Duisburg-Essen, Institute of Physiological Chemistry, University Hospital Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Katja Bettina Ferenz
- University
of Duisburg-Essen, Institute of Physiology, University Hospital Essen, Hufelandstraße 55, 45122 Essen, Germany
- CeNIDE (Center for Nanointegration Duisburg-Essen) University of
Duisburg-Essen, Carl-Benz-Strasse
199, 47057 Duisburg, Germany
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37
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Chen J, Cao D, Fortmann SD, Curcio CA, Feist RM, Crosson JN. Transthyretin proteoforms of intraocular origin in human subretinal fluid. Exp Eye Res 2022; 222:109163. [PMID: 35760119 DOI: 10.1016/j.exer.2022.109163] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/24/2022] [Accepted: 06/20/2022] [Indexed: 11/26/2022]
Abstract
Understanding the molecular composition of ocular tissues and fluids could inform new approaches to prevalent causes of blindness. Subretinal fluid accumulating between the photoreceptor outer segments and retinal pigment epithelium (RPE) is potentially a rich source of proteins and lipids normally cycling among outer retinal cells and choroid. Herein, intact post-translationally modified proteins (proteoforms) were extracted from subretinal fluids of five patients with rhegmatogenous retinal detachment (RRD), analyzed by tandem mass spectrometry, and compared to published data on these same proteins as synthesized by other organs. Single-nuclei transcriptomic data from non-diseased human retina/RPE were used to identify whether proteins in subretinal fluid were of potential ocular origin. Two human donor eyes with normal maculas were immunoprobed for transthyretin (TTR) with appropriate controls. The three most abundant proteins detected in subretinal fluid were albumin, TTR, and apolipoprotein A-I. Remarkably, TTR relative to the other proteins was more abundant than its serum counterpart, suggestive of TTR being synthesized predominantly locally. Six post-translationally modified protein forms (proteoforms) of TTR were detected, with the relative amount of glutathionylated TTR being much higher in the subretinal fluid (12-43%) than values reported for serum (<5%) and cerebrospinal fluid (0.4-13%). Moreover, a putative glycosylated TTR dimer of 32,428 Da was detected as the fourth most abundant protein. The high abundance of TTR and putative TTR dimer in subretinal fluid was supported by analysis of available single-nuclei transcriptomic data, which showed strong and specific signal for TTR in RPE. Immunohistochemistry further showed strong diffuse TTR immunoreactivity in choroidal stroma that contrasted with vertically aligned signal in the outer segment zone of the subretinal space and negligible signal in RPE cell bodies. These results suggest that TTR in the retina is synthesized intraocularly, and glutathionylation is crucial for its normal function. Further studies on the composition, function, and quantities of TTR and other proteoforms in subretinal fluid could inform mechanisms, diagnostic methods, and treatment strategies for age-related macular degeneration, familial amyloidosis, and other retinal diseases involving dysregulation of physiologic lipid transfer and oxidative stress.
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Affiliation(s)
- Jianzhong Chen
- Department of Optometry and Vision Science, The University of Alabama at Birmingham, Birmingham, AL, United States.
| | - Dongfeng Cao
- Department of Ophthalmology and Visual Sciences, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Seth D Fortmann
- Department of Ophthalmology and Visual Sciences, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Christine A Curcio
- Department of Ophthalmology and Visual Sciences, The University of Alabama at Birmingham, Birmingham, AL, United States.
| | - Richard M Feist
- Department of Ophthalmology and Visual Sciences, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Jason N Crosson
- Department of Ophthalmology and Visual Sciences, The University of Alabama at Birmingham, Birmingham, AL, United States
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38
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A Metabolomic Analysis of Cirrhotic Ascites. Molecules 2022; 27:molecules27123935. [PMID: 35745058 PMCID: PMC9228447 DOI: 10.3390/molecules27123935] [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: 04/10/2022] [Revised: 05/26/2022] [Accepted: 06/16/2022] [Indexed: 11/23/2022] Open
Abstract
Ascites is a common complication of decompensated liver cirrhosis, and yet relatively little is known about its biochemical composition. We conducted two metabolomic investigations, comparing the profile of ascites from 33 cirrhotic patients and postoperative peritoneal drainage fluid from 33 surgical patients (Experiment 1). The profile of paired ascites and plasma was also compared in 17 cirrhotic patients (Experiment 2). Gas chromatography−mass spectrometry-based metabolomics identified 29 metabolites that significantly characterized ascites fluid, whether postoperative drainage fluid or plasma were used as controls. Ten elevated amino acids (glutamine, proline, histidine, tyrosine, glycine, valine, threonine, methionine, lysine, phenylalanine) and seven diminished lipids (laurate, myristate, palmitate, oleate, vaccenate, stearate, cholesterol) largely comprised the cirrhotic ascites metabolomic phenotype that differed significantly (adjusted p < 0.002 to 0.03) from peritoneal drainage fluid or plasma. The pattern of upregulated amino acids in cirrhotic ascites did not indicate albumin proteolysis by peritoneal bacteria. Bidirectional clustering showed that the more severe the cirrhosis, the lower the lipid concentration in ascitic fluid. The metabolomic compartment of ascites in patients with decompensated cirrhosis is characterized by increased amino acids and decreased lipids. These novel findings have potential relevance for diagnostic purposes.
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Casulleras M, Flores-Costa R, Duran-Güell M, Zhang IW, López-Vicario C, Curto A, Fernández J, Arroyo V, Clària J. Albumin Lipidomics Reveals Meaningful Compositional Changes in Advanced Cirrhosis and Its Potential to Promote Inflammation Resolution. Hepatol Commun 2022; 6:1443-1456. [PMID: 35178899 PMCID: PMC9134813 DOI: 10.1002/hep4.1893] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/20/2021] [Accepted: 12/22/2021] [Indexed: 11/23/2022] Open
Abstract
Albumin infusions are therapeutically used to revert hypoalbuminemia and to replace the extensively oxidized albumin molecule circulating in patients with acutely decompensated (AD) cirrhosis. Because albumin has high affinity for lipids, here we characterized the albumin lipidome in patients with AD and explored the albumin effects on the release of fatty acid (FA)-derived lipid mediators by peripheral leukocytes. Lipids and lipid mediators were measured by liquid chromatography-tandem mass spectrometry in albumin-enriched and albumin-depleted plasma fractions separated by affinity chromatography and in leukocyte incubations from 18 patients with AD and 10 healthy subjects (HS). Lipid mediators were also measured in 41 patients with AD included in an albumin therapy trial. The plasma lipidome associated with AD cirrhosis was characterized by generalized suppression of all lipid classes except FAs. In contrast to HS, albumin from patients with AD had lower content of polyunsaturated FAs (PUFAs), especially of the omega-3-PUFA docosahexaenoic acid. Consistent with this, the PUFA-derived lipid mediator landscape of albumin from patients with AD was dominated by lower content of monohydroxy FA precursors of anti-inflammatory/pro-resolving lipid mediators (i.e., 15-hydroxyeicosatetraenoic acid [15-HETE]). In addition, albumin from patients with AD was depleted in prostaglandin (PG) E2 , suggesting that this proinflammatory PG primarily travels disassociated to albumin in these patients. Incubation of leukocytes with exogenous albumin reduced PG production while inducing 15-lipoxygenase expression and 15-HETE release. Similar effects were seen under lipopolysaccharide plus N-formylmethionyl-leucyl-phenylalanine-stimulated conditions. Finally, PG levels were lower in patients with AD receiving albumin therapy, whereas 15-HETE was increased after albumin treatment compared with baseline. Conclusion: Our findings indicate that the albumin lipid composition is severely disorganized in AD cirrhosis and that administration of exogenous albumin has the potential to redirect leukocyte biosynthesis from pro-inflammatory to pro-resolving lipid mediators.
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Affiliation(s)
- Mireia Casulleras
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain.,Biochemistry and Molecular Genetics ServiceHospital Clínic-IDIBAPS-CIBERehdBarcelonaSpain
| | - Roger Flores-Costa
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain.,Biochemistry and Molecular Genetics ServiceHospital Clínic-IDIBAPS-CIBERehdBarcelonaSpain
| | - Marta Duran-Güell
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain.,Biochemistry and Molecular Genetics ServiceHospital Clínic-IDIBAPS-CIBERehdBarcelonaSpain
| | - Ingrid W Zhang
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain.,Biochemistry and Molecular Genetics ServiceHospital Clínic-IDIBAPS-CIBERehdBarcelonaSpain
| | - Cristina López-Vicario
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain.,Biochemistry and Molecular Genetics ServiceHospital Clínic-IDIBAPS-CIBERehdBarcelonaSpain
| | - Anna Curto
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain
| | - Javier Fernández
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain.,Liver UnitHospital ClínicBarcelonaSpain
| | - Vicente Arroyo
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain
| | - Joan Clària
- European Foundation for the Study of Chronic Liver FailureBarcelonaSpain.,Biochemistry and Molecular Genetics ServiceHospital Clínic-IDIBAPS-CIBERehdBarcelonaSpain.,Department of Biomedical SciencesUniversity of BarcelonaBarcelonaSpain
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40
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Muranaka Y, Mizutani A, Kobayashi M, Nakamoto K, Matsue M, Takagi F, Okazaki K, Nishi K, Yamazaki K, Nishii R, Shikano N, Okamoto S, Maki H, Kawai K. 123I-BMIPP, a Radiopharmaceutical for Myocardial Fatty Acid Metabolism Scintigraphy, Could Be Utilized in Bacterial Infection Imaging. Pharmaceutics 2022; 14:pharmaceutics14051008. [PMID: 35631596 PMCID: PMC9143722 DOI: 10.3390/pharmaceutics14051008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/27/2022] [Accepted: 05/03/2022] [Indexed: 02/04/2023] Open
Abstract
In this study, we evaluated the use of 15-(4-123I-iodophenyl)-3(R,S)-methylpentadecanoic acid (123I-BMIPP) to visualize fatty acid metabolism in bacteria for bacterial infection imaging. We found that 123I-BMIPP, which is used for fatty acid metabolism scintigraphy in Japan, accumulated markedly in Escherichia coli EC-14 similar to 18F-FDG, which has previously been studied for bacterial imaging. To elucidate the underlying mechanism, we evaluated changes in 123I-BMIPP accumulation under low-temperature conditions and in the presence of a CD36 inhibitor. The uptake of 123I-BMIPP by EC-14 was mediated via the CD36-like fatty-acid-transporting membrane protein and accumulated by fatty acid metabolism. In model mice infected with EC-14, the biological distribution and whole-body imaging were assessed using 123I-BMIPP and 18F-FDG. The 123I-BMIPP biodistribution study showed that, 8 h after infection, the ratio of 123I-BMIPP accumulated in infected muscle to that in control muscle was 1.31 at 60 min after 123I-BMIPP injection. In whole-body imaging 1.5 h after 123I-BMIPP administration and 9.5 h after infection, infected muscle exhibited a 1.33-times higher contrast than non-infected muscle. Thus, 123I-BMIPP shows potential for visualizing fatty acid metabolism of bacteria for imaging bacterial infections.
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Affiliation(s)
- Yuka Muranaka
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan; (Y.M.); (K.N.)
| | - Asuka Mizutani
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan; (A.M.); (M.K.); (S.O.)
| | - Masato Kobayashi
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan; (A.M.); (M.K.); (S.O.)
| | - Koya Nakamoto
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan; (Y.M.); (K.N.)
| | - Miki Matsue
- Ishikawa Prefectural Institute of Public Health and Environmental Science, 1-11, Taiyogaoka, Kanazawa 920-1154, Japan;
| | - Fumika Takagi
- Laboratory for Drug Discovery & Disease Research, Shionogi & Co., Ltd., 3-1-1, Futaba-cho, Toyonaka 561-0825, Japan; (F.T.); (K.O.); (H.M.)
| | - Kenichi Okazaki
- Laboratory for Drug Discovery & Disease Research, Shionogi & Co., Ltd., 3-1-1, Futaba-cho, Toyonaka 561-0825, Japan; (F.T.); (K.O.); (H.M.)
| | - Kodai Nishi
- Department of Radioisotope Medicine, Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan;
| | - Kana Yamazaki
- Department of Molecular Imaging and Theranostics, Institute for Quantum Medical Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan; (K.Y.); (R.N.)
| | - Ryuichi Nishii
- Department of Molecular Imaging and Theranostics, Institute for Quantum Medical Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan; (K.Y.); (R.N.)
| | - Naoto Shikano
- Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Inashiki 300-0394, Japan;
| | - Shigefumi Okamoto
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan; (A.M.); (M.K.); (S.O.)
- Advanced Health Care Science Research Unit, Innovative Integrated Bio-Research Core Institute for Frontier Science Initiative, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan
| | - Hideki Maki
- Laboratory for Drug Discovery & Disease Research, Shionogi & Co., Ltd., 3-1-1, Futaba-cho, Toyonaka 561-0825, Japan; (F.T.); (K.O.); (H.M.)
| | - Keiichi Kawai
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan; (Y.M.); (K.N.)
- Biomedical Imaging Research Center, University of Fukui, 23-3 Matsuoka-shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui 910-1193, Japan
- Correspondence: ; Tel.: +81-76-265-2527; Fax: +81-76-234-4366
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41
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Masood S, Pennington ER, Simmons SO, Bromberg PA, Shaikh SR, Rice RL, Gold A, Zhang Z, Samet JM. Live cell imaging of oxidative stress in human airway epithelial cells exposed to isoprene hydroxyhydroperoxide. Redox Biol 2022; 51:102281. [PMID: 35306372 PMCID: PMC8933716 DOI: 10.1016/j.redox.2022.102281] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 01/18/2023] Open
Abstract
Exposure to respirable air particulate matter (PM2.5) in ambient air is associated with morbidity and premature deaths. A major source of PM2.5 is the photooxidation of volatile plant-produced organic compounds such as isoprene. Photochemical oxidation of isoprene leads to the formation of hydroperoxides, environmental oxidants that lead to inflammatory (IL-8) and adaptive (HMOX1) gene expression in human airway epithelial cells (HAEC). To examine the mechanism through which these oxidants alter intracellular redox balance, we used live-cell imaging to monitor the effects of isoprene hydroxyhydroperoxides (ISOPOOH) in HAEC expressing roGFP2, a sensor of the glutathione redox potential (EGSH). Non-cytotoxic exposure of HAEC to ISOPOOH resulted in a rapid and robust increase in EGSH that was independent of the generation of intracellular or extracellular hydrogen peroxide. Our results point to oxidation of GSH through the redox relay initiated by glutathione peroxidase 4, directly by ISOPOOH or indirectly by ISOPOOH-generated lipid hydroperoxides. We did not find evidence for involvement of peroxiredoxin 6. Supplementation of HAEC with polyunsaturated fatty acids enhanced ISOPOOH-induced glutathione oxidation, providing additional evidence that ISOPOOH initiates lipid peroxidation of cellular membranes. These findings demonstrate that ISOPOOH is a potent environmental airborne hydroperoxide with the potential to contribute to oxidative burden of human airway posed by inhalation of secondary organic aerosols.
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Affiliation(s)
- Syed Masood
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | - Steven O Simmons
- National Center for Computational Toxicology, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Philip A Bromberg
- Center for Environmental Medicine, Asthma and Lung Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Saame R Shaikh
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Rebecca L Rice
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Avram Gold
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Zhenfa Zhang
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - James M Samet
- Public Health and Integrated Toxicology Division, U.S. Environmental Protection Agency, Chapel Hill, NC, USA.
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42
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Levine PM, Craven TW, Li X, Balana AT, Bird GH, Godes M, Salveson PJ, Erickson PW, Lamb M, Ahlrichs M, Murphy M, Ogohara C, Said MY, Walensky LD, Pratt MR, Baker D. Generation of Potent and Stable GLP-1 Analogues Via "Serine Ligation". ACS Chem Biol 2022; 17:804-809. [PMID: 35319882 PMCID: PMC9173702 DOI: 10.1021/acschembio.2c00075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Peptide and protein bioconjugation technologies have revolutionized our ability to site-specifically or chemoselectively install a variety of functional groups for applications in chemical biology and medicine, including the enhancement of bioavailability. Here, we introduce a site-specific bioconjugation strategy inspired by chemical ligation at serine that relies on a noncanonical amino acid containing a 1-amino-2-hydroxy functional group and a salicylaldehyde ester. More specifically, we harness this technology to generate analogues of glucagon-like peptide-1 that resemble Semaglutide, a long-lasting blockbuster drug currently used in the clinic to regulate glucose levels in the blood. We identify peptides that are more potent than unmodified peptide and equipotent to Semaglutide in a cell-based activation assay, improve the stability in human serum, and increase glucose disposal efficiency in vivo. This approach demonstrates the potential of "serine ligation" for various applications in chemical biology, with a particular focus on generating stabilized peptide therapeutics.
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Affiliation(s)
- Paul M. Levine
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Timothy W. Craven
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Xinting Li
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | | | | | | | - Patrick J. Salveson
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Patrick W. Erickson
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Mila Lamb
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Maggie Ahlrichs
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Michael Murphy
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Cassandra Ogohara
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Meerit Y. Said
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | | | | | - David Baker
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
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43
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Xu YD, Tian L, Lai RY, Li Z, Procházková E, Ho J, Stenzel MH. Development of an Albumin–Polymer Bioconjugate via Covalent Conjugation and Supramolecular Interactions. Bioconjug Chem 2022; 33:321-332. [DOI: 10.1021/acs.bioconjchem.1c00536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- You Dan Xu
- School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| | - Linqing Tian
- School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| | - Rebecca Yong Lai
- School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| | - Zihao Li
- School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| | - Eliška Procházková
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague 166 10, Czech Republic
| | - Junming Ho
- School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
| | - Martina H. Stenzel
- School of Chemistry, The University of New South Wales, Sydney 2052, NSW, Australia
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44
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Bressan MC, Belo AT, Amaral A, Cordeiro D, Boari CA, Bettencourt C, van Harten S, Moreira O, da Gama LT, Almeida JM. The impact of genetic groups (Alentejano and F1 Landrace x Large White pigs) and body weight (90, 120 and 160kg) on blood metabolites. Livest Sci 2022. [DOI: 10.1016/j.livsci.2021.104810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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45
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Rutherford SH, Greetham GM, Towrie M, Parker AW, Kharratian S, Krauss TF, Nordon A, Baker MJ, Hunt NT. Detection of paracetamol binding to albumin in blood serum using 2D-IR spectroscopy. Analyst 2022; 147:3464-3469. [DOI: 10.1039/d2an00978a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-Dimensional Infrared (2D-IR) spectroscopy is used to detect binding of paracetamol with proteins in blood serum. Quantitative peak patterns are observed indicating structural changes of the albumins' secondary structure when paracetamol bound.
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Affiliation(s)
- Samantha H. Rutherford
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Technology and Innovation Centre, 99 George Street, Glasgow, G1 1RD, UK
| | - Gregory M. Greetham
- STFC Central Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, OX11 0QX, UK
| | - Michael Towrie
- STFC Central Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, OX11 0QX, UK
| | - Anthony W. Parker
- STFC Central Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, OX11 0QX, UK
| | - Soheila Kharratian
- Department of Chemistry and York Biomedical Institute, University of York, Heslington, York, YO10 5DD, UK
- School of Physics, Engineering and Technology and York Biomedical Research Institute, University of York, Heslington, York, YO10 5DD, UK
| | - Thomas F. Krauss
- School of Physics, Engineering and Technology and York Biomedical Research Institute, University of York, Heslington, York, YO10 5DD, UK
| | - Alison Nordon
- WestCHEM, Department of Pure and Applied Chemistry and CPACT, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Matthew J. Baker
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Technology and Innovation Centre, 99 George Street, Glasgow, G1 1RD, UK
- Dxcover Ltd, Suite RC534, 204 George Street, Glasgow, G1 1XL, UK
| | - Neil T. Hunt
- Department of Chemistry and York Biomedical Institute, University of York, Heslington, York, YO10 5DD, UK
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46
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Li J. Evaluation of blood simulating solvents in extractables and leachables testing for chemical characterization of medical devices based on Abraham general solvation model. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.116995] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Guzzi R, Bartucci R. Interactive multiple binding of oleic acid, warfarin and ibuprofen with human serum albumin revealed by thermal and fluorescence studies. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2022; 51:41-49. [PMID: 35048131 DOI: 10.1007/s00249-021-01582-w] [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: 09/01/2021] [Revised: 11/23/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Human serum albumin binds a wide variety of drugs with different structure and affinity to two main binding sites, drug site 1 (DS1) and drug site 2 (DS2), which partially or totally overlap with fatty acid (FA) sites. Although multiple binding sites are available for endogenous compounds, FAs are the primary physiological ligands of albumin and their competition in the occupancy of DS1 and DS2 affects the binding of exogenous molecules, with a possible impact on drug delivery. In this work, we have investigated the simultaneous binding of oleic acid, warfarin and ibuprofen to albumin using differential scanning calorimetry and fluorescence to evaluate the impact on the conformational stability of the protein. The two drugs are widely used for their anticoagulant (warfarin) and anti-inflammatory (ibuprofen) properties, and can be also considered as site markers to probe DS1 and DS2, respectively. Oleic acid is one of the most important fatty acids from a physiological point of view for its role as a source of energy for cells, and also it binds albumin with the highest association constant. When complexed with oleic acid the calorimetric profile of albumin shows a biphasic trend whose line shape depends on the ligand concentration. The binding capacity of either warfarin or ibuprofen to albumin is modulated by oleate molecules in a concentration-dependent mode being synergic cooperative (warfarin) or competitive-like (ibuprofen). The overall results provide insights on the dynamics of albumin/ligands complex, which in turn may have important pharmacokinetic and pharmacodynamic implications.
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Affiliation(s)
- Rita Guzzi
- Department of Physics, Molecular Biophysics Laboratory, University of Calabria, 87036, Rende, Italy.
- CNR-NANOTEC, Licryl-UOS Cosenza and CEMIF.Cal, Department of Physics, University of Calabria, 87036, Rende, Italy.
| | - Rosa Bartucci
- Department of Physics, Molecular Biophysics Laboratory, University of Calabria, 87036, Rende, Italy
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036, Rende, Italy
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48
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Gao X, Mazière AD, Beard R, Klumperman J, Hannoush RN. Fatty acylation enhances the cellular internalization and cytosolic distribution of a cystine-knot peptide. iScience 2021; 24:103220. [PMID: 34712919 PMCID: PMC8529511 DOI: 10.1016/j.isci.2021.103220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/14/2021] [Accepted: 09/30/2021] [Indexed: 02/07/2023] Open
Abstract
Delivering peptides into cells could open up possibilities for targeting intracellular proteins. Although fatty acylation of peptide therapeutics improves their systemic half-life, it remains unclear how it influences their cellular uptake. Here, we demonstrate that a fatty acylated peptide exhibits enhanced cellular internalization and cytosolic distribution compared to the un-acylated version. By using a cystine-knot peptide as a model system, we report an efficient strategy for site-specific conjugation of fatty acids. Peptides modified with fatty acids of different chain lengths entered cells through clathrin-mediated and macropinocytosis pathways. The cellular uptake was mediated by the length of the hydrocarbon chain, with myristic acid conjugates displaying the highest distribution across the cytoplasm including the cytosol, and endomembranes of the ER, Golgi and mitochondria. Our studies demonstrate how fatty acylation improves the cellular uptake of peptides, and lay the groundwork for future development of bioactive peptides with enhanced intracellular distribution. A synthetic strategy comprises site-specific conjugation of fatty acids to peptides Fatty acylation of a peptide enhances its cellular uptake and cytosolic distribution Myristoylated peptides display a high cytoplasmic distribution Fatty acylated peptides are internalized via multiple endocytic routes
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Affiliation(s)
- Xinxin Gao
- Department of Early Discovery Biochemistry, Genentech, South San Francisco, CA, USA
| | - Ann De Mazière
- Department of Cell Biology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Rhiannon Beard
- Department of Early Discovery Biochemistry, Genentech, South San Francisco, CA, USA
| | - Judith Klumperman
- Department of Cell Biology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Rami N Hannoush
- Department of Early Discovery Biochemistry, Genentech, South San Francisco, CA, USA
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49
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Darnaud M, De Vadder F, Bogeat P, Boucinha L, Bulteau AL, Bunescu A, Couturier C, Delgado A, Dugua H, Elie C, Mathieu A, Novotná T, Ouattara DA, Planel S, Saliou A, Šrůtková D, Yansouni J, Stecher B, Schwarzer M, Leulier F, Tamellini A. A standardized gnotobiotic mouse model harboring a minimal 15-member mouse gut microbiota recapitulates SOPF/SPF phenotypes. Nat Commun 2021; 12:6686. [PMID: 34795236 PMCID: PMC8602333 DOI: 10.1038/s41467-021-26963-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 10/28/2021] [Indexed: 01/14/2023] Open
Abstract
Mus musculus is the classic mammalian model for biomedical research. Despite global efforts to standardize breeding and experimental procedures, the undefined composition and interindividual diversity of the microbiota of laboratory mice remains a limitation. In an attempt to standardize the gut microbiome in preclinical mouse studies, here we report the development of a simplified mouse microbiota composed of 15 strains from 7 of the 20 most prevalent bacterial families representative of the fecal microbiota of C57BL/6J Specific (and Opportunistic) Pathogen-Free (SPF/SOPF) animals and the derivation of a standardized gnotobiotic mouse model called GM15. GM15 recapitulates extensively the functionalities found in the C57BL/6J SOPF microbiota metagenome, and GM15 animals are phenotypically similar to SOPF or SPF animals in two different facilities. They are also less sensitive to the deleterious effects of post-weaning malnutrition. In this work, we show that the GM15 model provides increased reproducibility and robustness of preclinical studies by limiting the confounding effect of fluctuation in microbiota composition, and offers opportunities for research focused on how the microbiota shapes host physiology in health and disease.
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Affiliation(s)
- Marion Darnaud
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France.
| | - Filipe De Vadder
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Ecole Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, Université Claude Bernard Lyon 1, Unité Mixte de Recherche 5242, 46 Allée d'Italie, 69364, Lyon, Cedex, 07, France
| | - Pascaline Bogeat
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Lilia Boucinha
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Anne-Laure Bulteau
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Ecole Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, Université Claude Bernard Lyon 1, Unité Mixte de Recherche 5242, 46 Allée d'Italie, 69364, Lyon, Cedex, 07, France
| | - Andrei Bunescu
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Céline Couturier
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Ana Delgado
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Hélène Dugua
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Céline Elie
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Alban Mathieu
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Tereza Novotná
- Laboratory of Gnotobiology, Institute of Microbiology of the Czech Academy of Sciences, 54922, Nový Hrádek, Czech Republic
| | | | - Séverine Planel
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Adrien Saliou
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Dagmar Šrůtková
- Laboratory of Gnotobiology, Institute of Microbiology of the Czech Academy of Sciences, 54922, Nový Hrádek, Czech Republic
| | - Jennifer Yansouni
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
| | - Bärbel Stecher
- Max von Pettenkofer Institute of Hygiene and Medical Microbiology, Ludwig-Maximilians-University of Munich, 80336, Munich, Germany
- German Center for Infection Research (DZIF), Partner Site, Munich, Germany
| | - Martin Schwarzer
- Laboratory of Gnotobiology, Institute of Microbiology of the Czech Academy of Sciences, 54922, Nový Hrádek, Czech Republic
| | - François Leulier
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Ecole Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, Université Claude Bernard Lyon 1, Unité Mixte de Recherche 5242, 46 Allée d'Italie, 69364, Lyon, Cedex, 07, France
| | - Andrea Tamellini
- BIOASTER, Institut de Recherche Technologique, 40 avenue Tony Garnier, 69007, Lyon, France
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50
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Bełdowski P, Przybyłek M, Raczyński P, Dedinaite A, Górny K, Wieland F, Dendzik Z, Sionkowska A, Claesson PM. Albumin-Hyaluronan Interactions: Influence of Ionic Composition Probed by Molecular Dynamics. Int J Mol Sci 2021; 22:ijms222212360. [PMID: 34830249 PMCID: PMC8625520 DOI: 10.3390/ijms222212360] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 10/28/2021] [Accepted: 11/10/2021] [Indexed: 12/15/2022] Open
Abstract
The lubrication mechanism in synovial fluid and joints is not yet fully understood. Nevertheless, intermolecular interactions between various neutral and ionic species including large macromolecular systems and simple inorganic ions are the key to understanding the excellent lubrication performance. An important tool for characterizing the intermolecular forces and their structural consequences is molecular dynamics. Albumin is one of the major components in synovial fluid. Its electrostatic properties, including the ability to form molecular complexes, are closely related to pH, solvation, and the presence of ions. In the context of synovial fluid, it is relevant to describe the possible interactions between albumin and hyaluronate, taking into account solution composition effects. In this study, the influence of Na+, Mg2+, and Ca2+ ions on human serum albumin–hyaluronan interactions were examined using molecular dynamics tools. It was established that the presence of divalent cations, and especially Ca2+, contributes mostly to the increase of the affinity between hyaluronan and albumin, which is associated with charge compensation in negatively charged hyaluronan and albumin. Furthermore, the most probable binding sites were structurally and energetically characterized. The indicated moieties exhibit a locally positive charge which enables hyaluronate binding (direct and water mediated).
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Affiliation(s)
- Piotr Bełdowski
- Faculty of Chemical Technology and Engineering, Institute of Mathematics & Physics, Bydgoszcz University of Science & Technology, 85-796 Bydgoszcz, Poland
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Engineering Pedagogics, SE-100 44 Stockholm, Sweden;
- Correspondence:
| | - Maciej Przybyłek
- Department of Physical Chemistry, Pharmacy Faculty, Collegium Medicum of Bydgoszcz, Nicolaus Copernicus University in Toruń, Kurpińskiego 5, 85-950 Bydgoszcz, Poland;
| | - Przemysław Raczyński
- Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzow, Poland; (P.R.); (K.G.); (Z.D.)
| | - Andra Dedinaite
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Engineering Pedagogics, SE-100 44 Stockholm, Sweden;
- Division of Bioscience and Materials, RISE Research Institutes of Sweden, SE-114 86 Stockholm, Sweden
| | - Krzysztof Górny
- Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzow, Poland; (P.R.); (K.G.); (Z.D.)
| | - Florian Wieland
- Helmholtz-Zentrum Hereon: Institute for metallic Biomaterials, Max-Planck-Straße 1, 21502 Geesthacht, Germany;
| | - Zbigniew Dendzik
- Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzow, Poland; (P.R.); (K.G.); (Z.D.)
| | - Alina Sionkowska
- Department of Biomaterials and Cosmetics Chemistry, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarin 7, 87-100 Torun, Poland;
| | - Per M. Claesson
- KTH Royal Institute of Technology, Department of Chemistry, Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, SE-100 44 Stockholm, Sweden;
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