1
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Kehrein J, Sotriffer C. Molecular Dynamics Simulations for Rationalizing Polymer Bioconjugation Strategies: Challenges, Recent Developments, and Future Opportunities. ACS Biomater Sci Eng 2024; 10:51-74. [PMID: 37466304 DOI: 10.1021/acsbiomaterials.3c00636] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
The covalent modification of proteins with polymers is a well-established method for improving the pharmacokinetic properties of therapeutically valuable biologics. The conjugated polymer chains of the resulting hybrid represent highly flexible macromolecular structures. As the dynamics of such systems remain rather elusive for established experimental techniques from the field of protein structure elucidation, molecular dynamics simulations have proven as a valuable tool for studying such conjugates at an atomistic level, thereby complementing experimental studies. With a focus on new developments, this review aims to provide researchers from the polymer bioconjugation field with a concise and up to date overview of such approaches. After introducing basic principles of molecular dynamics simulations, as well as methods for and potential pitfalls in modeling bioconjugates, the review illustrates how these computational techniques have contributed to the understanding of bioconjugates and bioconjugation strategies in the recent past and how they may lead to a more rational design of novel bioconjugates in the future.
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Affiliation(s)
- Josef Kehrein
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Würzburg 97074, Germany
| | - Christoph Sotriffer
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Würzburg 97074, Germany
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2
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Samaja M, Malavalli A, Vandegriff KD. How Nitric Oxide Hindered the Search for Hemoglobin-Based Oxygen Carriers as Human Blood Substitutes. Int J Mol Sci 2023; 24:14902. [PMID: 37834350 PMCID: PMC10573492 DOI: 10.3390/ijms241914902] [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: 08/23/2023] [Revised: 09/30/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023] Open
Abstract
The search for a clinically affordable substitute of human blood for transfusion is still an unmet need of modern society. More than 50 years of research on acellular hemoglobin (Hb)-based oxygen carriers (HBOC) have not yet produced a single formulation able to carry oxygen to hemorrhage-challenged tissues without compromising the body's functions. Of the several bottlenecks encountered, the high reactivity of acellular Hb with circulating nitric oxide (NO) is particularly arduous to overcome because of the NO-scavenging effect, which causes life-threatening side effects as vasoconstriction, inflammation, coagulopathies, and redox imbalance. The purpose of this manuscript is not to add a review of candidate HBOC formulations but to focus on the biochemical and physiological events that underly NO scavenging by acellular Hb. To this purpose, we examine the differential chemistry of the reaction of NO with erythrocyte and acellular Hb, the NO signaling paths in physiological and HBOC-challenged situations, and the protein engineering tools that are predicted to modulate the NO-scavenging effect. A better understanding of two mechanisms linked to the NO reactivity of acellular Hb, the nitrosylated Hb and the nitrite reductase hypotheses, may become essential to focus HBOC research toward clinical targets.
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Affiliation(s)
- Michele Samaja
- Department of Health Science, University of Milan, 20143 Milan, Italy
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3
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Okamoto W, Hiwatashi Y, Kobayashi T, Morita Y, Onozawa H, Iwazaki M, Kohno M, Tomiyasu H, Tochinai R, Georgieva R, Bäumler H, Komatsu T. Poly(2-ethyl-2-oxazoline)-Conjugated Hemoglobins as a Red Blood Cell Substitute. ACS APPLIED BIO MATERIALS 2023; 6:3330-3340. [PMID: 37504970 DOI: 10.1021/acsabm.3c00392] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Hemoglobin wrapped covalently with poly(2-ethyl-2-oxazoline)s (POx-Hb) is characterized physicochemically and physiologically as an artificial O2 carrier for use as a red blood cell (RBC) substitute. The POx-Hb is generated by linkage of porcine Hb surface-lysines to a sulfhydryl terminus of the POx derivative, with the average binding number of the polymers ascertained as 6. The POx-Hb shows moderately higher colloid osmotic activity and O2 affinity than the naked Hb. Human adult HbA conjugated with POx also possesses equivalent features and O2 binding properties. The POx-Hb solution exhibits good hemocompatibility, with no influence on the functions of platelets, granulocytes, and monocytes. Its circulation half-life in rats is 14 times longer than that of naked Hb. Hemorrhagic shock in rats is relieved sufficiently by infusion of the POx-Hb solution, as revealed by improvements of circulatory parameters. Serum biochemistry tests and histopathological observations indicate no acute toxicity or abnormality in the related organs. All results indicate that POx-Hb represents an attractive alternative for RBCs and a useful O2 therapeutic reagent in transfusion medicine.
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Affiliation(s)
- Wataru Okamoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Yuuki Hiwatashi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Tatsuhiro Kobayashi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Yoshitsugu Morita
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Hiroto Onozawa
- Department of General Thoracic Surgery, School of Medicine, Tokai University, 143 Shimokasuya, Isehara-shi, Kanagawa 259-1193, Japan
| | - Masayuki Iwazaki
- Department of General Thoracic Surgery, School of Medicine, Tokai University, 143 Shimokasuya, Isehara-shi, Kanagawa 259-1193, Japan
| | - Mitsutomo Kohno
- Department of General Thoracic Surgery, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe-shi, Saitama 350-8550, Japan
| | - Hirotaka Tomiyasu
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Ryota Tochinai
- Department of Veterinary Pathophysiology and Animal Health, Graduate School of Agriculture and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Radostina Georgieva
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
- Department of Medical Physics, Biophysics and Radiology, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria
| | - Hans Bäumler
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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4
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Okamoto W, Hasegawa M, Kohyama N, Kobayashi T, Usui T, Onozawa H, Hashimoto R, Iwazaki M, Kohno M, Georgieva R, Bäumler H, Komatsu T. Core-Shell Structured Hemoglobin Nanoparticles as Artificial O 2 Carriers. ACS APPLIED BIO MATERIALS 2022; 5:5844-5853. [PMID: 36399036 DOI: 10.1021/acsabm.2c00813] [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: 11/19/2022]
Abstract
This paper describes the synthesis and O2 binding properties of core-shell structured hemoglobin (Hb) nanoparticles (NPs), artificial O2 carriers of five types, as designed for use as red blood cell (RBC) substitutes. Human adult Hbs were polymerized using α-succinimidyl-ω-maleimide and dithiothreitol in spheroidal shapes to create parent particles. Subsequent covalent wrapping of the sphere with human serum albumin (HSA) yielded 100 nm-diameter Hb nanoparticles (HbNPs). The HbNP showed higher O2 affinity than that of RBC, but NPs prepared under a N2 atmosphere exhibited low O2 affinity. Entirely synthetic particles comprising recombinant human adult Hb and recombinant HSA were also fabricated. Using a recombinant Hb (rHb) variant in which Leu-β28 of the heme pocket had been replaced with Phe, we found somewhat low O2 affinity of rHb(βL28F)NP. Particles made of stroma-free Hb (SFHb) containing natural antioxidant enzyme catalase (SFHbNP) formed a very stable O2 complex, even in aqueous H2O2 solution. The SFHbNP showed good blood compatibility and did not affect the blood cell component functionality. The circulation half-life of SFHbNP in rats was considerably longer than that of naked Hb. All results indicate these Hb-based NPs as useful alternative materials for RBC and as a useful O2 therapeutic reagent in diverse medical scenarios.
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Affiliation(s)
- Wataru Okamoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Mai Hasegawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Natsumi Kohyama
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Tatsuhiro Kobayashi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Tomone Usui
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Hiroto Onozawa
- Department of General Thoracic Surgery, School of Medicine, Tokai University, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
| | - Ryo Hashimoto
- Department of General Thoracic Surgery, School of Medicine, Tokai University, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
| | - Masayuki Iwazaki
- Department of General Thoracic Surgery, School of Medicine, Tokai University, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
| | - Mitsutomo Kohno
- Department of General Thoracic Surgery, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Radostina Georgieva
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, Charitéplatz 1, Berlin 10117, Germany.,Department of Medical Physics, Biophysics and Radiology, Medical Faculty, Trakia University, Stara Zagora 6000, Bulgaria
| | - Hans Bäumler
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, Charitéplatz 1, Berlin 10117, Germany
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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5
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Savla C, Palmer AF. Lyophilized annelid mega-hemoglobin retains its' quaternary structure and oxygen equilibrium properties after room temperature storage for over 6 months. PLoS One 2022; 17:e0263996. [PMID: 35176086 PMCID: PMC8853537 DOI: 10.1371/journal.pone.0263996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/31/2022] [Indexed: 11/19/2022] Open
Abstract
The long-term storage stability and portability of hemoglobin (Hb)-based oxygen carriers are important design criteria in the development of these therapeutics. Lyophilization or storing proteins in a freeze-dried form is known to increase storage lifetime and reduce overall weight. In this study, we lyophilized the extracellular mega-hemoglobin of the annelid Lumbricus terrestris and tested the storage stability at different temperatures and oxygenation conditions. Storage in refrigerated conditions for over 6 months in the presence of N2 reduced oxidation by 50% while storage at room temperature in the presence of N2 reduced oxidation by 60%, all while maintaining the structural stability of the mega-hemoglobin. We also demonstrated a reliable strategy to freeze dry Hbs in the presence of a minimally non-reducing disaccharide sugar that could be easily re-solubilized in deionized water. Overall, this study made significant advances towards long term storage stability of oxygen therapeutics for direct applications in transfusion medicine.
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Affiliation(s)
- Chintan Savla
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, United States of America
| | - Andre F. Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, United States of America
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6
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Charbe NB, Castillo F, Tambuwala MM, Prasher P, Chellappan DK, Carreño A, Satija S, Singh SK, Gulati M, Dua K, González-Aramundiz JV, Zacconi FC. A new era in oxygen therapeutics? From perfluorocarbon systems to haemoglobin-based oxygen carriers. Blood Rev 2022; 54:100927. [PMID: 35094845 DOI: 10.1016/j.blre.2022.100927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 12/14/2021] [Accepted: 01/12/2022] [Indexed: 02/09/2023]
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7
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Faggiano S, Ronda L, Bruno S, Abbruzzetti S, Viappiani C, Bettati S, Mozzarelli A. From hemoglobin allostery to hemoglobin-based oxygen carriers. Mol Aspects Med 2021; 84:101050. [PMID: 34776270 DOI: 10.1016/j.mam.2021.101050] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 11/05/2021] [Accepted: 11/05/2021] [Indexed: 12/18/2022]
Abstract
Hemoglobin (Hb) plays its vital role through structural and functional properties evolutionarily optimized to work within red blood cells, i.e., the tetrameric assembly, well-defined oxygen affinity, positive cooperativity, and heterotropic allosteric regulation by protons, chloride and 2,3-diphosphoglycerate. Outside red blood cells, the Hb tetramer dissociates into dimers, which exhibit high oxygen affinity and neither cooperativity nor allosteric regulation. They are prone to extravasate, thus scavenging endothelial NO and causing hypertension, and cause nephrotoxicity. In addition, they are more prone to autoxidation, generating radicals. The need to overcome the adverse effects associated with cell-free Hb has always been a major hurdle in the development of substitutes of allogeneic blood transfusions for all clinical situations where blood is unavailable or cannot be used due to, for example, religious objections. This class of therapeutics, indicated as hemoglobin-based oxygen carriers (HBOCs), is formed by genetically and/or chemically modified Hbs. Many efforts were devoted to the exploitation of the wealth of biochemical and biophysical information available on Hb structure, function, and dynamics to design safe HBOCs, overcoming the negative effects of free plasma Hb. Unfortunately, so far, no HBOC has been approved by FDA and EMA, except for compassionate use. However, the unmet clinical needs that triggered intensive investigations more than fifty years ago are still awaiting an answer. Recently, HBOCs "repositioning" has led to their successful application in organ perfusion fluids.
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Affiliation(s)
- Serena Faggiano
- Department of Food and Drug, University of Parma, Parma, Italy; Institute of Biophysics, National Research Council, Pisa, Italy
| | - Luca Ronda
- Institute of Biophysics, National Research Council, Pisa, Italy; Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Stefano Bruno
- Department of Food and Drug, University of Parma, Parma, Italy
| | - Stefania Abbruzzetti
- Department of Mathematical, Physical and Computer Sciences, University of Parma, Parma, Italy
| | - Cristiano Viappiani
- Department of Mathematical, Physical and Computer Sciences, University of Parma, Parma, Italy
| | - Stefano Bettati
- Institute of Biophysics, National Research Council, Pisa, Italy; Department of Medicine and Surgery, University of Parma, Parma, Italy; National Institute of Biostructures and Biosystems, Rome, Italy
| | - Andrea Mozzarelli
- Department of Food and Drug, University of Parma, Parma, Italy; Institute of Biophysics, National Research Council, Pisa, Italy.
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8
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Matsuhira T, Sakai H. Entropy-Driven Supramolecular Ring-Opening Polymerization of a Cyclic Hemoglobin Monomer for Constructing a Hemoglobin-PEG Alternating Polymer with Structural Regularity. Biomacromolecules 2021; 22:1944-1954. [PMID: 33856766 DOI: 10.1021/acs.biomac.1c00061] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Our earlier report described that a cyclic hemoglobin (Hb) monomer with two β subunits of a Hb molecule (α2β2) bound through a flexible polyethylene glycol (PEG) chain undergoes reversible supramolecular ring-opening polymerization (S-ROP) to produce a supramolecular Hb polymer with a Hb-PEG alternating structure. In this work, we polymerized cyclic Hb monomers with different ring sizes (2, 5, 10, or 20 kDa PEG) to evaluate the thermodynamics of S-ROP equilibrium. Quantification of the produced supramolecular Hb polymers and the remaining cyclic Hb monomers in the equilibrium state revealed a negligibly small enthalpy change in S-ROP (ΔHp ≤ 1 kJ·mol-1) and a markedly positive entropy change increasing with the ring size (ΔSp = 26.8-33.2 J·mol-1·K-1). The results suggest an entropy-driven mechanism in S-ROP: a cyclic Hb monomer with the larger ring size prefers to form a supramolecular Hb polymer. The S-ROP used for this study has the potential to construct submicrometer-sized Hb-PEG alternating polymers having structural regularity.
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Affiliation(s)
- Takashi Matsuhira
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan
| | - Hiromi Sakai
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan
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9
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Savla C, Palmer AF. Structural Stability and Biophysical Properties of the Mega-Protein Erythrocruorin Are Regulated by Polyethylene Glycol Surface Coverage. Biomacromolecules 2021; 22:2081-2093. [PMID: 33821616 DOI: 10.1021/acs.biomac.1c00196] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A wide variety of hemoglobin-based oxygen carriers (HBOCs) have been designed for use as red blood cell (RBC) substitutes in transfusion medicine, ex vivo organ perfusion, oxygen delivery to hypoxic tissues, and a myriad of other applications. However, hemoglobin (Hb) derived from annelids (erythrocruorins [Ecs]) comprise a natural class of HBOC, since they are larger in size (30 nm in diameter) and contain more heme groups per molecule (144 heme groups) compared to human Hb (hHb; 5 nm in diameter and 4 heme groups). The larger size of Ec compared to hHb reduces tissue extravasation from the vascular space, thus, reducing vasoconstriction, systemic hypertension, and tissue oxidative injury when used as an RBC substitute. In addition, prior research has shown that Ecs possess slower auto-oxidation rates than hHb at physiological temperature, thus, making them attractive candidates for use as RBC substitutes. Unfortunately, it was also observed that Ecs have a much lower circulatory half-life in vivo compared to other HBOCs. Hence, conjugating polyethylene glycol (PEG) to the surface of Ec was proposed as a simple strategy to increase Ec circulatory half-life. Therefore, in order to inform future in vivo studies with PEGylated Ec, we decided to investigate the structural stability and biophysical properties of variable PEG surface coverage on Ec compared to native Ec. We observed an increase in PEG-Ec diameter and molecular weight (MW) and changes to the quaternary structure, secondary structure, and surface hydrophobicity after PEGylation. There was also an increase in oxygen binding affinity, reduction in oxygen offloading rate, and increase in auto-oxidation rate for increasing PEGylation ratios. Weak dissociation of Ec was also observed after dense PEGylation caused by steric repulsion of the conjugated PEG chains. Hence, we determined an optimum Ec PEGylation ratio that resulted in a substantial size and MW increase along with preservation of oxygen binding properties. In future studies, these materials will be tested in animal models to evaluate pharmacodynamics, pharmacokinetics, tissue oxygenation, microcirculatory responses, and overall safety.
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Affiliation(s)
- Chintan Savla
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
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10
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Munasinghe A, Mathavan A, Mathavan A, Lin P, Colina CM. Atomistic insight towards the impact of polymer architecture and grafting density on structure-dynamics of PEGylated bovine serum albumin and their applications. J Chem Phys 2021; 154:075101. [PMID: 33607915 DOI: 10.1063/5.0038306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Macromolecules such as proteins conjugated to polyethylene glycol (PEG) have been employed in therapeutic drug applications, and recent research has emphasized the potential of varying polymer architectures and conjugation strategies to achieve improved efficacy. In this study, we performed atomistic molecular dynamics simulations of bovine serum albumin (BSA) conjugated to 5 kDa PEG polymers in an array of schemes, including varied numbers of attached chains, grafting density, and nonlinear architectures. Nonlinear architectures included U-shaped PEG, Y-shaped PEG, and poly(oligoethylene glycol methacrylate) (POEGMA). Buried surface area calculations and polymer volume map analyses revealed that volume exclusion behaviors of the high grafting density conjugate promoted additional protein-polymer interactions when compared to simply increasing numbers of conjugated chains uniformly across the protein surface. Investigation of nonlinear polymer architectures showed that stable polymer-lysine loop-like conformations seen in previous conjugate designs were more variable in prevalence, especially in POEGMA, which contained short oligomer PEG chains. The findings of this comprehensive study of alternate PEGylation schemes of BSA provide critical insight into molecular patterns of interaction within bioconjugates and highlight their importance in the future of controlled modification of conjugate system parameters.
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Affiliation(s)
- Aravinda Munasinghe
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
| | - Akash Mathavan
- Department of Medicine, University of Florida, Gainesville, Florida 32611, USA
| | - Akshay Mathavan
- Department of Medicine, University of Florida, Gainesville, Florida 32611, USA
| | - Ping Lin
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
| | - Coray M Colina
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
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11
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PEG Linker Improves Antitumor Efficacy and Safety of Affibody-Based Drug Conjugates. Int J Mol Sci 2021; 22:ijms22041540. [PMID: 33546481 PMCID: PMC7913616 DOI: 10.3390/ijms22041540] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 01/27/2021] [Accepted: 01/28/2021] [Indexed: 12/13/2022] Open
Abstract
Antibody drug conjugates (ADCs) have become an important modality of clinical cancer treatment. However, traditional ADCs have some limitations, such as reduced permeability in solid tumors due to the high molecular weight of monoclonal antibodies, difficulty in preparation and heterogeneity of products due to the high drug/antibody ratio (4-8 small molecules per antibody). Miniaturized ADCs may be a potential solution, although their short circulation half-life may lead to new problems. In this study, we propose a novel design strategy for miniaturized ADCs in which drug molecules and small ligand proteins are site-specifically coupled via a bifunctional poly(ethylene glycol) (PEG) chain. The results showed that the inserted PEG chains significantly prolonged the circulation half-life but also obviously reduced the cytotoxicity of the conjugates. Compared with the conjugate ZHER2-SMCC-MMAE (HM), which has no PEG insertion, ZHER2-PEG4K-MMAE (HP4KM) and ZHER2-PEG10K-MMAE (HP10KM) with 4 or 10 kDa PEG insertions have 2.5- and 11.2-fold half-life extensions and 4.5- and 22-fold in vitro cytotoxicity reductions, respectively. The combined effect leads to HP10KM having the most ideal tumor therapeutic ability at the same dosages in the animal model, and its off-target toxicity was also reduced by more than 4 times compared with that of HM. These results may indicate that prolonging the half-life is very helpful in improving the therapeutic capacity of miniaturized ADCs. In the future, the design of better strategies that can prolong half-life without affecting cytotoxicity may be useful for further improving the therapeutic potential of these molecules.
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12
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Vamisetti GB, Satish G, Sulkshane P, Mann G, Glickman MH, Brik A. On-Demand Detachment of Succinimides on Cysteine to Facilitate (Semi)Synthesis of Challenging Proteins. J Am Chem Soc 2020; 142:19558-19569. [PMID: 33136379 PMCID: PMC7705887 DOI: 10.1021/jacs.0c07663] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
![]()
The
maleimide group is a widely used reagent for bioconjugation
of peptides, proteins, and oligonucleotides employing Michael addition
and Diels–Alder cycloaddition reactions. However, the utility
of this functionality in chemical synthesis of peptides and proteins
remains unexplored. We report, for the first time that PdII complexes can mediate the efficient removal of various succinimide
derivatives in aqueous conditions. Succinimide removal by PdII was applied for the synthesis of two ubiquitin activity-based probes
(Ub-ABPs) employing solid phase chemical ligation (SPCL). SPCL was
achieved through a sequential three segment ligation on a polymer
support via a maleimide anchor. The obtained probes successfully formed
the expected covalent complexes with deubiquitinating enzymes (DUBs)
USP2 and USP7, highlighting the use of our new method for efficient
preparation of unique synthetic proteins. Importantly, we demonstrate
the advantages of our newly developed method for the protection and
deprotection of native cysteine with a succinimide group in a peptide
fragment derived from thioredoxin-1 (Trx-1) obtained via intein based
expression to enable ligation/desulfurization and subsequent disulfide
bond formation in a one-pot process.
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Affiliation(s)
- Ganga B Vamisetti
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 3200008, Israel
| | - Gandhesiri Satish
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 3200008, Israel
| | - Prasad Sulkshane
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa 3200008, Israel
| | - Guy Mann
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 3200008, Israel
| | - Michael H Glickman
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa 3200008, Israel
| | - Ashraf Brik
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 3200008, Israel
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13
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Gaina V, Nechifor M, Gaina C, Ursache O. Maleimides – a versatile platform for polymeric materials designed/tailored for high performance applications. POLYM-PLAST TECH MAT 2020. [DOI: 10.1080/25740881.2020.1811315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- V. Gaina
- Laboratory of Poliaddition and Photochemistry, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | - M. Nechifor
- Laboratory of Poliaddition and Photochemistry, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | - C. Gaina
- Laboratory of Poliaddition and Photochemistry, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | - O. Ursache
- Laboratory of Poliaddition and Photochemistry, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
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14
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Savla C, Munoz C, Hickey R, Belicak M, Gilbert C, Cabrales P, Palmer AF. Purification of Lumbricus terrestris Mega-Hemoglobin for Diverse Oxygen Therapeutic Applications. ACS Biomater Sci Eng 2020; 6:4957-4968. [PMID: 33313397 DOI: 10.1021/acsbiomaterials.0c01146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Oxygen therapeutics are being developed for a variety of applications in transfusion medicine. In order to reduce the side-effects (vasoconstriction, systemic hypertension, and oxidative tissue injury) associated with previous generations of oxygen therapeutics, new strategies are focused on increasing the molecular diameter of hemoglobin obtained from mammalian sources via polymerization and encapsulation. Another approach towards oxygen therapeutic design has centered on using naturally occurring large molecular diameter hemoglobins (i.e. erythrocruorins) derived from annelid sources. Therefore, the goal of this study was to purify erythrocruorin from the terrestrial worm Lumbricus terrestris for diverse oxygen therapeutic applications. Tangential flow filtration (TFF) was used as a scalable protein purification platform to obtain a >99% pure LtEc product, which was confirmed by size exclusion high performance liquid chromatography and SDS-PAGE analysis. In vitro characterization concluded that the ultra-pure LtEc product had oxygen equilibrium properties similar to human red blood cells, and a lower rate of auto-oxidation compared to human hemoglobin, both of which should enable efficient oxygen transport under physiological conditions. In vivo evaluation concluded that the ultra-pure product had positive effects on the microcirculation sustaining functional capillary density compared to a less pure product (~86% purity). In summary, we purified an LtEc product with favorable biophysical properties that performed well in an animal model using a reliable and scalable purification platform to eliminate undesirable proteins.
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Affiliation(s)
- Chintan Savla
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Carlos Munoz
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA
| | - Richard Hickey
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Maria Belicak
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Christopher Gilbert
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Pedro Cabrales
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
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15
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Morita Y, Saito A, Yamaguchi J, Komatsu T. Haemoglobin(βK120C)-albumin trimer as an artificial O 2 carrier with sufficient haemoglobin allostery. RSC Chem Biol 2020; 1:128-136. [PMID: 34458753 PMCID: PMC8341959 DOI: 10.1039/d0cb00056f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 06/25/2020] [Indexed: 11/21/2022] Open
Abstract
The allosteric O2 release of haemoglobin (Hb) allows for efficient O2 delivery from the lungs to the tissues. However, allostery is weakened in Hb-based O2 carriers because the chemical modifications of the Lys- and Cys-β93 residues prevent the quaternary transition of Hb. In this paper, we describe the synthesis and O2 binding properties of a recombinant Hb [rHb(βK120C)]–albumin heterotrimer that maintains sufficient Hb allostery. The rHb(βK120C) core, with two additional cysteine residues at the symmetrical positions on its protein surface, was expressed using yeast cells. The mutations did not influence either the O2 binding characteristics or the quaternary transition of Hb. Maleimide-activated human serum albumins (HSAs) were coupled with rHb(βK120C) at the two Cys-β120 positions, yielding the rHb(βK120C)–HSA2 trimer, in which the Cys-β93 residues were unreacted. Molecular dynamics simulation demonstrated that the HSA moiety does not interact with the amino acid residues around the haem pockets and the α1β2 surfaces of the rHb(βK120C) core, the alteration of which retards Hb allostery. Circular dichroism spectroscopy demonstrated that the quaternary transition between the relaxed (R) state and the tense (T) state of the Hb core occurred upon both the association and dissociation of O2. In phosphate-buffered saline solution (pH 7.4) at 37 °C, the rHb(βK120C)–HSA2 trimer exhibited a sigmoidal O2 equilibrium curve with the O2 affinity and cooperativity identical to those of native Hb (p50 = 12 Torr, n = 2.4). Moreover, we observed an equal Bohr effect and 2,3-diphosphoglycerate response in the rHb(βK120C)–HSA2 trimer compared with naked Hb. Recombinant haemoglobin [rHb(βK120C)] was coupled with two human serum albumins (HSAs), yielding a rHb(βK120C)–HSA2 heterotrimer, which shows a sigmoidal O2 equilibrium curve and sufficient Hb allostery identical to those of native Hb.![]()
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Affiliation(s)
- Yoshitsugu Morita
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Asuka Saito
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Jun Yamaguchi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
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16
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Cooper CE, Silkstone GGA, Simons M, Gretton S, Rajagopal BS, Allen-Baume V, Syrett N, Shaik T, Popa G, Sheng X, Bird M, Choi JW, Piano R, Ronda L, Bettati S, Paredi G, Mozzarelli A, Reeder BJ. Engineering hemoglobin to enable homogenous PEGylation without modifying protein functionality. Biomater Sci 2020; 8:3896-3906. [PMID: 32539053 DOI: 10.1039/c9bm01773a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In order to infuse hemoglobin into the vasculature as an oxygen therapeutic or blood substitute, it is necessary to increase the size of the molecule to enhance vascular retention. This aim can be achieved by PEGylation. However, using non-specific conjugation methods creates heterogenous mixtures and alters protein function. Site-specific PEGylation at the naturally reactive thiol on human hemoglobin (βCys93) alters hemoglobin oxygen binding affinity and increases its autooxidation rate. In order to avoid this issue, new reactive thiol residues were therefore engineered at sites distant to the heme group and the α/β dimer/dimer interface. The two mutants were βCys93Ala/αAla19Cys and βCys93Ala/βAla13Cys. Gel electrophoresis, size exclusion chromatography and mass spectrometry revealed efficient PEGylation at both αAla19Cys and βAla13Cys, with over 80% of the thiols PEGylated in the case of αAla19Cys. For both mutants there was no significant effect on the oxygen affinity or the cooperativity of oxygen binding. PEGylation at αAla19Cys had the additional benefit of decreasing the rates of autoxidation and heme release, properties that have been considered contributory factors to the adverse clinical side effects exhibited by previous hemoglobin based oxygen carriers. PEGylation at αAla19Cys may therefore be a useful component of future clinical products.
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Affiliation(s)
- Chris E Cooper
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex CO4 3SQ, UK.
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17
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Lee H. Molecular Simulations of PEGylated Biomolecules, Liposomes, and Nanoparticles for Drug Delivery Applications. Pharmaceutics 2020; 12:E533. [PMID: 32531886 PMCID: PMC7355693 DOI: 10.3390/pharmaceutics12060533] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/04/2020] [Accepted: 06/08/2020] [Indexed: 12/17/2022] Open
Abstract
Since the first polyethylene glycol (PEG)ylated protein was approved by the FDA in 1990, PEGylation has been successfully applied to develop drug delivery systems through experiments, but these experimental results are not always easy to interpret at the atomic level because of the limited resolution of experimental techniques. To determine the optimal size, structure, and density of PEG for drug delivery, the structure and dynamics of PEGylated drug carriers need to be understood close to the atomic scale, as can be done using molecular dynamics simulations, assuming that these simulations can be validated by successful comparisons to experiments. Starting with the development of all-atom and coarse-grained PEG models in 1990s, PEGylated drug carriers have been widely simulated. In particular, recent advances in computer performance and simulation methodologies have allowed for molecular simulations of large complexes of PEGylated drug carriers interacting with other molecules such as anticancer drugs, plasma proteins, membranes, and receptors, which makes it possible to interpret experimental observations at a nearly atomistic resolution, as well as help in the rational design of drug delivery systems for applications in nanomedicine. Here, simulation studies on the following PEGylated drug topics will be reviewed: proteins and peptides, liposomes, and nanoparticles such as dendrimers and carbon nanotubes.
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Affiliation(s)
- Hwankyu Lee
- Department of Chemical Engineering, Dankook University, Yongin 16890, Korea
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18
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Pires IS, Savla C, Palmer AF. Poly(ethylene glycol) Surface-Conjugated Apohemoglobin as a Synthetic Heme Scavenger. Biomacromolecules 2020; 21:2155-2164. [DOI: 10.1021/acs.biomac.0c00141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Ivan S. Pires
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Chintan Savla
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Andre F. Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
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19
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Zhang Z, Zhang Y, Song S, Yin L, Sun D, Gu J. Recent advances in the bioanalytical methods of polyethylene glycols and PEGylated pharmaceuticals. J Sep Sci 2020; 43:1978-1997. [DOI: 10.1002/jssc.201901340] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/15/2020] [Accepted: 02/16/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Zhi Zhang
- Research Center for Drug Metabolism, College of Life ScienceJilin University Changchun P. R. China
- Beijing Institute of Drug Metabolism Beijing P. R. China
| | - Yuyao Zhang
- Research Center for Drug Metabolism, College of Life ScienceJilin University Changchun P. R. China
- Beijing Institute of Drug Metabolism Beijing P. R. China
| | - Shiwen Song
- Research Center for Drug Metabolism, College of Life ScienceJilin University Changchun P. R. China
- Beijing Institute of Drug Metabolism Beijing P. R. China
| | - Lei Yin
- Research Center for Drug Metabolism, College of Life ScienceJilin University Changchun P. R. China
- Research Institute of Translational MedicineThe First Bethune Hospital of Jilin University Changchun P. R. China
| | - Dong Sun
- Department of Biopharmacy, College of Life ScienceJilin University Changchun P. R. China
- Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education”Yantai University Yantai P. R. China
| | - Jingkai Gu
- Research Center for Drug Metabolism, College of Life ScienceJilin University Changchun P. R. China
- Beijing Institute of Drug Metabolism Beijing P. R. China
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20
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Munasinghe A, Mathavan A, Mathavan A, Lin P, Colina CM. PEGylation within a confined hydrophobic cavity of a protein. Phys Chem Chem Phys 2019; 21:25584-25596. [PMID: 31720639 DOI: 10.1039/c9cp04387j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The conjugation of polyethylene glycol (PEG) to proteins, known as PEGylation, has increasingly been employed to expand the efficacy of therapeutic drugs. Recently, research has emphasized the effect of the conjugation site on protein-polymer interactions. In this study, we performed atomistic molecular dynamics (MD) simulations of lysine 116 PEGylated bovine serum albumin (BSA) to illustrate how conjugation near a hydrophobic pocket affects the conjugate's dynamics and observed altered low mode vibrations in the protein. MD simulations were performed for a total of 1.5 μs for each PEG chain molecular mass from 2 to 20 kDa. Analysis of preferential PEG-BSA interactions showed that polymer behavior was also affected as proximity to the attractive protein surface patches promoted interactions in small (2 kDa) PEG chains, while the confined environment of the conjugation site reduced the expected BSA surface coverage when the polymer molecular mass increased to 10 kDa. This thorough analysis of PEG-BSA interactions and polymer dynamics increases the molecular understanding of site-specific PEGylation and enhances the use of protein-polymer conjugates as therapeutics.
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Affiliation(s)
- Aravinda Munasinghe
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA.
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21
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Morita Y, Igarashi K, Funaki R, Komatsu T. Hemoglobin(βC93A)-Albumin Cluster: Mutation of Cysteine-β93 to Alanine Allows Moderate Reduction of O 2 Affinity by Inositol Hexaphosphate. Chembiochem 2019; 20:1684-1687. [PMID: 30802345 DOI: 10.1002/cbic.201900079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Indexed: 11/11/2022]
Abstract
Covalent wrapping of recombinant human hemoglobin (Cys-β93→Ala) variant rHb(βC93A) by human serum albumin (HSA) yielded the rHb(βC93A)-HSA3 cluster as an artificial O2 carrier as a red blood cell substitute. Complexation of inositol hexaphosphate to the central rHb(βC93A) core reduced the O2 affinity moderately, in much the same way as that of naked hemoglobin. This reduction might be attributable to the inert, small Ala-β93 residue, which cannot be reacted with the bulky maleimide crosslinker.
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Affiliation(s)
- Yoshitsugu Morita
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Keisuke Igarashi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Ryosuke Funaki
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga Bunkyo-ku, Tokyo, 112-8551, Japan
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22
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Darwish G, Helmerhorst EJ, Schuppan D, Oppenheim FG, Wei G. Pharmaceutically modified subtilisins withstand acidic conditions and effectively degrade gluten in vivo. Sci Rep 2019; 9:7505. [PMID: 31097786 PMCID: PMC6522598 DOI: 10.1038/s41598-019-43837-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 04/26/2019] [Indexed: 12/20/2022] Open
Abstract
Detoxification of gluten immunogenic epitopes is a promising strategy for the treatment of celiac disease. Our previous studies have shown that these epitopes can be degraded in vitro by subtilisin enzymes derived from Rothia mucilaginosa, a natural microbial colonizer of the oral cavity. The challenge is that the enzyme is not optimally active under acidic conditions as encountered in the stomach. We therefore aimed to protect and maintain subtilisin-A enzyme activity by exploring two pharmaceutical modification techniques: PEGylation and Polylactic glycolic acid (PLGA) microencapsulation. PEGylation of subtilisin-A (Sub-A) was performed by attaching methoxypolyethylene glycol (mPEG, 5 kDa). The PEGylation protected subtilisin-A from autolysis at neutral pH. The PEGylated Sub-A (Sub-A-mPEG) was further encapsulated by PLGA. The microencapsulated Sub-A-mPEG-PLGA showed significantly increased protection against acid exposure in vitro. In vivo, gluten immunogenic epitopes were decreased by 60% in the stomach of mice fed with chow containing Sub-A-mPEG-PLGA (0.2 mg Sub-A/g chow) (n = 9) compared to 31.9% in mice fed with chow containing unmodified Sub-A (n = 9). These results show that the developed pharmaceutical modification can protect Sub-A from auto-digestion as well as from acid inactivation, thus rendering the enzyme more effective for applications in vivo.
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Affiliation(s)
- Ghassan Darwish
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine 700 Albany Street, Boston, Massachusetts, USA
| | - Eva J Helmerhorst
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine 700 Albany Street, Boston, Massachusetts, USA
| | - Detlef Schuppan
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.,Institute of Translational Immunology and Research Center for Immune Therapy, University Medical Center, Johannes-Gutenberg-University, Mainz, Germany
| | - Frank G Oppenheim
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine 700 Albany Street, Boston, Massachusetts, USA
| | - Guoxian Wei
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine 700 Albany Street, Boston, Massachusetts, USA.
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23
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Munasinghe A, Mathavan A, Mathavan A, Lin P, Colina CM. Molecular Insight into the Protein–Polymer Interactions in N-Terminal PEGylated Bovine Serum Albumin. J Phys Chem B 2019; 123:5196-5205. [DOI: 10.1021/acs.jpcb.8b12268] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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24
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25
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Matsuhira T, Yamamoto K, Sakai H. Ring-Opening Polymerization of Hemoglobin. Biomacromolecules 2019; 20:1592-1602. [DOI: 10.1021/acs.biomac.8b01789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Takashi Matsuhira
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan
| | - Keizo Yamamoto
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan
| | - Hiromi Sakai
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan
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26
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Meng F, Kaul D, Thangaswamy S, Bhutoria S, Gerfen G, Branch C, Intaglietta M, Acharya SA. Semisynthetic supra plasma expanders: a new class of therapeutics to improve microcircualtion in sickle cell anaemia. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:73-82. [DOI: 10.1080/21691401.2018.1543194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Fantao Meng
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Laboratory of Biochemistry and Vascular Biology, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MA, USA
| | - Dhananjaya Kaul
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | | | - Savita Bhutoria
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Gary Gerfen
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Craig Branch
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Radiology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Marcos Intaglietta
- Department of Bioengineering, University of California, San Diego, CA, USA
| | - Seetharama A. Acharya
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA
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27
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Morita Y, Yamada T, Kureishi M, Kihira K, Komatsu T. Quaternary Structure Analysis of a Hemoglobin Core in Hemoglobin–Albumin Cluster. J Phys Chem B 2018; 122:12031-12039. [DOI: 10.1021/acs.jpcb.8b10077] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yoshitsugu Morita
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Taiga Yamada
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Moeka Kureishi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Kiyohito Kihira
- JEM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency (JAXA), 2-1-1 Sengen, Tsukuba-shi, Ibaraki 305-8505, Japan
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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28
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Alomari E, Ronda L, Bruno S, Paredi G, Marchetti M, Bettati S, Olivari D, Fumagalli F, Novelli D, Ristagno G, Latini R, Cooper CE, Reeder BJ, Mozzarelli A. High- and low-affinity PEGylated hemoglobin-based oxygen carriers: Differential oxidative stress in a Guinea pig transfusion model. Free Radic Biol Med 2018; 124:299-310. [PMID: 29920341 PMCID: PMC6191936 DOI: 10.1016/j.freeradbiomed.2018.06.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 06/11/2018] [Accepted: 06/15/2018] [Indexed: 12/26/2022]
Abstract
Hemoglobin-based oxygen carriers (HBOCs) are an investigational replacement for blood transfusions and are known to cause oxidative damage to tissues. To investigate the correlation between their oxygen binding properties and these detrimental effects, we investigated two PEGylated HBOCs endowed with different oxygen binding properties - but otherwise chemically identical - in a Guinea pig transfusion model. Plasma samples were analyzed for biochemical markers of inflammation, tissue damage and organ dysfunction; proteins and lipids of heart and kidney extracts were analyzed for markers of oxidative damage. Overall, both HBOCs produced higher oxidative stress in comparison to an auto-transfusion control group. Particularly, tissue 4-hydroxynonenal adducts, tissue malondialdehyde adducts and plasma 8-oxo-2'-deoxyguanosine exhibited significantly higher levels in comparison with the control group. For malondialdehyde adducts, a higher level in the renal tissue was observed for animals treated with the high-affinity HBOC, hinting at a correlation between the HBOCs oxygen binding properties and the oxidative stress they produce. Moreover, we found that the high-affinity HBOC produced greater tissue oxygenation in comparison with the low affinity one, possibly correlating with the higher oxidative stress it induced.
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Affiliation(s)
- Esra'a Alomari
- Department of Food and Drug, University of Parma, Parma, Italy
| | - Luca Ronda
- Department of Medicine and Surgery, University of Parma, Parma, Italy; Biopharmanet-TEC, University of Parma, Parma, Italy
| | - Stefano Bruno
- Department of Food and Drug, University of Parma, Parma, Italy; Biopharmanet-TEC, University of Parma, Parma, Italy.
| | - Gianluca Paredi
- Department of Food and Drug, University of Parma, Parma, Italy; Interdepartmental Center SITEIA.PARMA, University of Parma, Parma 43121, Italy
| | - Marialaura Marchetti
- Department of Medicine and Surgery, University of Parma, Parma, Italy; Biopharmanet-TEC, University of Parma, Parma, Italy
| | - Stefano Bettati
- Department of Medicine and Surgery, University of Parma, Parma, Italy; Biopharmanet-TEC, University of Parma, Parma, Italy; Istituto Nazionale Biostrutture e Biosistemi, Rome, Italy
| | - Davide Olivari
- Istituto di Ricerche Farmacologiche 'Mario Negri', Milan, Italy
| | | | - Deborah Novelli
- Istituto di Ricerche Farmacologiche 'Mario Negri', Milan, Italy
| | | | - Roberto Latini
- Istituto di Ricerche Farmacologiche 'Mario Negri', Milan, Italy
| | - Chris E Cooper
- School of Biological Sciences, University of Essex, Colchester, United Kingdom
| | - Brandon J Reeder
- School of Biological Sciences, University of Essex, Colchester, United Kingdom
| | - Andrea Mozzarelli
- Department of Food and Drug, University of Parma, Parma, Italy; Biopharmanet-TEC, University of Parma, Parma, Italy; Istituto Nazionale Biostrutture e Biosistemi, Rome, Italy; Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Pisa, Italy
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29
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Sousa SF, Peres J, Coelho M, Vieira TF. Analyzing PEGylation through Molecular Dynamics Simulations. ChemistrySelect 2018. [DOI: 10.1002/slct.201800855] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sérgio F. Sousa
- UCIBIO@REQUIMTE; BioSIM; Departamento de Biomedicina; Faculdade de Medicina da Universidade do Porto, Alameda Professor Hernâni Monteiro; 4200-319, Porto Portugal
| | - Joana Peres
- LEPABE; Faculdade de Engenharia; Universidade do Porto, Porto; Portugal
| | - Manuel Coelho
- LEPABE; Faculdade de Engenharia; Universidade do Porto, Porto; Portugal
| | - Tatiana F. Vieira
- LEPABE; Faculdade de Engenharia; Universidade do Porto, Porto; Portugal
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30
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Matsuhira T, Kure T, Yamamoto K, Sakai H. Analysis of Dimeric αβ Subunit Exchange between PEGylated and Native Hemoglobins (α2β2 Tetramer) in an Equilibrated State by Intramolecular ββ-Cross-Linking. Biomacromolecules 2018; 19:3412-3420. [DOI: 10.1021/acs.biomac.8b00728] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Takashi Matsuhira
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara, 634-8521, Japan
| | - Tomoko Kure
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara, 634-8521, Japan
| | - Keizo Yamamoto
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara, 634-8521, Japan
| | - Hiromi Sakai
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara, 634-8521, Japan
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31
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Gu Z, Gao D, Al-Zubaydi F, Li S, Singh Y, Rivera K, Holloway J, Szekely Z, Love S, Sinko PJ. The effect of size and polymer architecture of doxorubicin-poly(ethylene) glycol conjugate nanocarriers on breast duct retention, potency and toxicity. Eur J Pharm Sci 2018; 121:118-125. [PMID: 29698706 DOI: 10.1016/j.ejps.2018.04.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 04/22/2018] [Indexed: 11/17/2022]
Abstract
Although systemic administration of chemotherapeutic agents is routinely used for treating invasive breast cancer, the only therapeutic options for ductal carcinoma in situ (DCIS) are surgery and radiation. Treating DCIS by delivering drugs locally to the affected milk duct offers significant advantages over systemic administration, including reduced systemic and breast toxicities, as well as a greatly reduced need for surgery and radiation. In this study, mammary gland retention and toxicity of intraductally administered poly(ethylene) glycol-doxorubicin (PEG-DOX) polymeric conjugate nanocarriers of varying molecular sizes and architectures were investigated. Nanocarriers were formed by conjugating one or more copies of doxorubicin to PEG polymers, of varying molecular weights (5, 10, 20, and 40 kDa) and architectures (linear, four-arm and eight-arm). Cytotoxicity against MCF7 cells, a human breast cancer cell line, was assessed, and IC50 values were calculated. The nanocarriers were intraductally administered into the mammary glands of female retired breeder Sprague-Dawley rats. Whole body images were captured using in vivo optical imaging, and changes in ductal structure as well local inflammation were monitored. Fluorescence intensities were monitored, over time, to evaluate nanocarrier mammary gland retention half-lives (t1/2). The IC50 values of PEG-DOX nanocarriers against MCF7 cells were 40 kDa PEG-(DOX)4 (1.23 μM) < 5 kDa PEG-DOX (1.76 μM) < 40 kDa PEG-(DOX)8 (3.49 μM) < 10 kDa PEG-DOX (3.86 μM) < 20 kDa PEG-DOX (8.96 μM) < 40 kDa PEG-DOX (18.11 μM), whereas the IC50 of free DOX was only 0.14 μM. The t1/2 of linear 5, 20, and 40 kDa nanocarriers were 2.2 ± 0.3, 3.6 ± 0.6, and 13.1 ± 3.4 h, whereas the retention t1/2 of 4- and 8-arm 40 kDa nanocarriers were 14.9 ± 5.6 h and 11.9 ± 2.9 h, respectively. The retention t1/2 of free doxorubicin was 2.0 ± 0.4 h, which was significantly shorter than that of the linear and branched 40 kDa PEG-DOX nanocarriers. Increased molecular weight and decreased branching both demonstrated a strong correlation to enhanced mammary gland retention. Intraductally administered free doxorubicin resulted in ductal damage, severe inflammation and generation of atypical cell neoplasms, whereas PEG-DOX nanocarriers induced only minor and transient inflammation (i.e., damaged epithelial cells and detached cellular debris). The 40 kDa 4-arm PEG-DOX nanocarrier demonstrated the longest ductal retention half-life, the lowest IC50 (i.e., most potent), and minimal ductal damage and inflammation. The current results suggest that PEG-DOX nanocarriers with prolonged ductal retention may present the best option for intraductal treatment of DCIS, due to their low local toxicity and potential for sustained therapeutic effect.
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Affiliation(s)
- Zichao Gu
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
| | - Dayuan Gao
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
| | - Firas Al-Zubaydi
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
| | - Shike Li
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
| | - Yashveer Singh
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA; Department of Chemistry, Center for Biomedical Engineering (CBME), Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India.
| | - Kristia Rivera
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
| | - Jennifer Holloway
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
| | - Zoltan Szekely
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA; Rutgers Cancer Institute of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA.
| | - Susan Love
- Dr. Susan Love Research Foundation, 16133 Ventura Suite 1000, Encino, CA 91436, USA.
| | - Patrick J Sinko
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA; Rutgers Cancer Institute of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA.
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Yokomaku K, Akiyama M, Morita Y, Kihira K, Komatsu T. Core-shell protein clusters comprising haemoglobin and recombinant feline serum albumin as an artificial O 2 carrier for cats. J Mater Chem B 2018; 6:2417-2425. [PMID: 32254458 DOI: 10.1039/c8tb00211h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This report describes the synthesis and structure of core-shell protein clusters comprising haemoglobin (Hb) at the centre and recombinant feline serum albumin (rFSA) at the exterior, named as haemoglobin-albumin clusters (Hb-rFSA3). Specifically, we highlight their capability as an artificial O2 carrier that can be used as a red blood cell (RBC) substitute for cats, the most populous pet animal in the world. First, rFSA was expressed by genetic engineering using Pichia yeast. The proteins show identical features to the native FSA derived from feline plasma. Single crystals of rFSA were prepared under a microgravity environment on the international space station (ISS), from which the structure was first revealed at 3.4 Å resolution. Subsequently, bovine Hb was wrapped covalently by rFSA using an α-succinimidyl-ε-maleimide crosslinker, yielding Hb-rFSA3 clusters. Three rFSA entities enfolded the Hb nuclei satisfactorily, giving the protein clusters a negative surface net charge (pI = 4.7) and preventing an immunological response against anti-Hb antibodies. The O2 affinity was higher (P50 = 9 Torr) than that of the native Hb. The Hb-rFSA3 clusters are anticipated for use as an alternative material for RBC transfusion, and as an O2 therapeutic reagent that can be exploited in various veterinary medicine scenarios.
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Affiliation(s)
- Kyoko Yokomaku
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
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Wu T, Huang H, Sheng Y, Shi H, Min Y, Liu Y. Transglutaminase mediated PEGylation of nanobodies for targeted nano-drug delivery. J Mater Chem B 2018; 6:1011-1017. [PMID: 32254288 DOI: 10.1039/c7tb03132g] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Targeted delivery of anticancer drugs that selectively accumulate in malignant cells could enhance drug efficacy and reduce side effects of conventional chemotherapy. In this work, we designed a single domain antibody (nanobody) based drug delivery system for targeted delivery of anticancer drugs. An anti-EGFR nanobody (Nb) was constructed with a C3-tag and a Q-tag for site specific modifications under physiological conditions. The site specific PEGylation of the nanobody was achieved via a transglutaminase catalyzed reaction through the coupling of the Q-tag with PEG-NH2. As a proof of concept, the PEGylated nanobody was tethered to HSA coated upconversion nanoparticles (UCNPs) through the C3-tag, and an anticancer drug, doxorubicin (DOX), was loaded. Results showed that the Nb-conjugated drug delivery system exhibits superior specificity to the EGFR positive tumor cells. The drug delivery system is highly accumulated in the EGFR positive tumor cells (A431), whereas there was no detectable accumulation in the EGFR negative cells (MCF-7). Consequently, the drug loaded particles demonstrated significantly higher anti-proliferation to A431 cells than to MCF-7 cells. This work provides an effective approach for site-specific modification of nanobodies for the construction of targeted drug delivery systems.
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Affiliation(s)
- Tiantian Wu
- CAS Key Laboratory of Soft Matter Chemistry, CAS High Magnetic Field Laboratory, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China.
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Xu D, Smolin N, Shaw RK, Battey SR, Tao A, Huang Y, Rahman SE, Caylor M. Molecular insights into the improved clinical performance of PEGylated interferon therapeutics: a molecular dynamics perspective. RSC Adv 2018; 8:2315-2322. [PMID: 35541455 PMCID: PMC9077387 DOI: 10.1039/c7ra12480e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 01/03/2018] [Indexed: 12/19/2022] Open
Abstract
PEGylation is a widely adopted process to covalently attach a polyethylene glycol (PEG) polymer to a protein drug for the purpose of optimizing drug clinical performance. While the outcomes of PEGylation in imparting pharmacological advantages have been examined through experimental studies, the underlying molecular mechanisms remain poorly understood. Using interferon (IFN) as a representative model system, we carried out comparative molecular dynamics (MD) simulations of free PEGx, apo-IFN, and PEGx-IFN (x = 50, 100, 200, 300) to characterize the molecular-level changes in IFN introduced by PEGylation. The simulations yielded molecular evidence directly linked to the improved protein stability, bioavailability, retention time, as well as the decrease in protein bioactivity with PEG conjugates. Our results indicate that there is a tradeoff between the benefits and costs of PEGylation. The optimal PEG chain length used in PEGylation needs to strike a good balance among the competing factors and maximizes the overall therapeutic efficacy of the protein drug. We anticipate the study will have a broad implication for protein drug design and development, and provide a unique computational approach in the context of optimizing PEGylated protein drug conjugates. We discovered molecular evidence that links PEGylation to improved clinical performance, yet at the expense of decreased bioactivity. Our computational approach will facilitate PEGylated protein drug design and optimize its overall therapeutic efficacy.![]()
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Affiliation(s)
- Dong Xu
- Department of Biomedical and Pharmaceutical Sciences
- College of Pharmacy
- Kasiska Division of Health Sciences
- Idaho State University
- Meridian
| | - Nikolai Smolin
- Department of Cell and Molecular Physiology
- Loyola University Chicago
- Maywood
- USA
| | | | | | - Aoxiang Tao
- Department of Biomedical and Pharmaceutical Sciences
- College of Pharmacy
- Kasiska Division of Health Sciences
- Idaho State University
- Meridian
| | - Yuying Huang
- Department of Biomedical and Pharmaceutical Sciences
- College of Pharmacy
- Kasiska Division of Health Sciences
- Idaho State University
- Meridian
| | - Shaikh Emdadur Rahman
- Department of Biomedical and Pharmaceutical Sciences
- College of Pharmacy
- Kasiska Division of Health Sciences
- Idaho State University
- Meridian
| | - Matthew L. Caylor
- Department of Biomedical and Pharmaceutical Sciences
- College of Pharmacy
- Kasiska Division of Health Sciences
- Idaho State University
- Meridian
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Zamecnik CR, Lowe MM, Patterson DM, Rosenblum MD, Desai TA. Injectable Polymeric Cytokine-Binding Nanowires Are Effective Tissue-Specific Immunomodulators. ACS NANO 2017; 11:11433-11440. [PMID: 29124929 PMCID: PMC5709211 DOI: 10.1021/acsnano.7b06094] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Injectable nanomaterials that interact with the host immune system without surgical intervention present spatially anchored complements to cell transplantation and could offer improved pharmacokinetics compared to systemic cytokine therapy. Here we demonstrate fabrication of high aspect ratio polycaprolactone nanowires coupled with cytokine-binding antibodies that assemble into porous matrices when injected into the subcutaneous space. These structures are fabricated using a nanotemplating technique that allows for tunability of particle dimensions and utilize a straightforward maleimide conjugation chemistry to allow site-specific coupling to proteins. Nanowires are well tolerated in vivo and incite minimal inflammatory infiltrate. Nanowires conjugated with antibodies were designed to capture and potentiate endogenous interleukin-2 (IL-2), an important leukocyte activating cytokine. Together these nanowire-antibody matrices were capable of localizing endogenous IL-2 in the skin and activated targeted specific natural killer and T cell subsets, demonstrating both tissue- and cell-specific immune activation. These self-assembling nanowire matrices show promise as scaffolds to present engineered, local receptor-ligand interactions for cytokine-mediated disease.
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Affiliation(s)
- Colin R. Zamecnik
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94158, United States
- UC Berkeley–UCSF Graduate Program in Bioengineering, University of California San Francisco, Mission Bay Campus, San Francisco, California 94158, United States
| | - Margaret M. Lowe
- Department of Dermatology, University of California San Francisco, San Francisco, California 94143, United States
| | - David M. Patterson
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California 94143, United States
| | - Michael D. Rosenblum
- Department of Dermatology, University of California San Francisco, San Francisco, California 94143, United States
| | - Tejal A. Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94158, United States
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36
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Structural, functional and physiochemical properties of dextran-bovine hemoglobin conjugate as a hemoglobin-based oxygen carrier. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.05.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Zhang C, Yu R, Li Z, Feng C, Wang Q, Liu Y, Su Z. Development of long-acting ciliary neurotrophic factor by site-specific conjugation with different-sized polyethylene glycols and transferrin. Int J Pharm 2017; 529:275-284. [DOI: 10.1016/j.ijpharm.2017.06.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/20/2017] [Accepted: 06/21/2017] [Indexed: 12/11/2022]
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38
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Yamada K, Yokomaku K, Kureishi M, Akiyama M, Kihira K, Komatsu T. Artificial Blood for Dogs. Sci Rep 2016; 6:36782. [PMID: 27830776 PMCID: PMC5103191 DOI: 10.1038/srep36782] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 10/20/2016] [Indexed: 12/11/2022] Open
Abstract
There is no blood bank for pet animals. Consequently, veterinarians themselves must obtain "blood" for transfusion therapy. Among the blood components, serum albumin and red blood cells (RBCs) are particularly important to save lives. This paper reports the synthesis, structure, and properties of artificial blood for the exclusive use of dogs. First, recombinant canine serum albumin (rCSA) was produced using genetic engineering with Pichia yeast. The proteins showed identical features to those of the native CSA derived from canine plasma. Furthermore, we ascertained the crystal structure of rCSA at 3.2 Å resolution. Pure rCSA can be used widely for numerous clinical and pharmaceutical applications. Second, hemoglobin wrapped covalently with rCSA, hemoglobin-albumin cluster (Hb-rCSA3), was synthesized as an artificial O2-carrier for the RBC substitute. This cluster possesses satisfactorily negative surface net charge (pI = 4.7), which supports enfolding of the Hb core by rCSA shells. The anti-CSA antibody recognized the rCSA exterior quantitatively. The O2-binding affinity was high (P50 = 9 Torr) compared to that of the native Hb. The Hb-rCSA3 cluster is anticipated for use as an alternative material for RBC transfusion, and as an O2 therapeutic reagent that can be exploited in various veterinary medicine situations.
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Affiliation(s)
- Kana Yamada
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Kyoko Yokomaku
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Moeka Kureishi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Motofusa Akiyama
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Kiyohito Kihira
- JEM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency (JAXA), 2-1-1 Sengen, Tsukuba-shi, Ibaraki 305-8505, Japan
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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Self-fluorescent drug delivery vector based on genipin-crosslinked polyethylenimine conjugated globin nanoparticle. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 71:17-24. [PMID: 27987695 DOI: 10.1016/j.msec.2016.09.059] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/23/2016] [Accepted: 09/26/2016] [Indexed: 11/20/2022]
Abstract
A kind of self-fluorescent, biocompatible, and low-toxic Genipin crosslinked Globin-PEI nanoparticle (Gb-G-PEI NP) with high enzymolysis-stability and photo-stability was synthesized successfully. The properties of the Gb-G-PEI NP were characterized, including its particle size, surface zeta potential, morphology, paclitaxel (PTX) loading capacity and release. The Gb-G-PEI NPs as imaging probe were investigated by Confocal Laser Scanning Microscope (CLSM) in vitro and by fluorescence imaging system in vivo. Cell imaging results showed that the tumor cell line (HepG-2) had the faster cell uptake rate and metabolism rate than the normal cell line (L-O2), this difference showed its tumor selectivity. MTT assay revealed that the PTX-loaded Gb-G-PEI NPs showed almost the equal potence to tumor cell HepG-2 as the free PTX at the same PTX concentration, while a lower cytotoxicity to normal cell L-O2, suggesting its promising utilization as a drug delivery system. The imaging on mice demonstrated the possibility of the self-fluorescent Gb-G-PEI NPs as probe in vivo. So Gb-G-PEI NPs can be potentially utilized as both tracking marker and tumor cell selective drug delivery system in the biomaterial field.
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40
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Schoettker P, Marcucci CE, Casso G, Heim C. Revisiting transfusion safety and alternatives to transfusion. Presse Med 2016; 45:e331-40. [DOI: 10.1016/j.lpm.2016.06.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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41
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Uz M, Bulmus V, Alsoy Altinkaya S. Effect of PEG Grafting Density and Hydrodynamic Volume on Gold Nanoparticle-Cell Interactions: An Investigation on Cell Cycle, Apoptosis, and DNA Damage. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5997-6009. [PMID: 27206138 DOI: 10.1021/acs.langmuir.6b01289] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this study, interactions of polyethylene glycol (PEG)-coated gold nanoparticles (AuNPs) with cells were investigated with particular focus on the relationship between the PEG layer properties (conformation, grafting density, and hydrodynamic volume) and cell cycle arrest, apoptosis, and DNA damage. Steric hindrance and PEG hydrodynamic volume controlled the protein adsorption, whereas the AuNP core size and PEG hydrodynamic volume were primary factors for cell uptake and viability. At all PEG grafting densities, the particles caused significant cell cycle arrest and DNA damage against CaCo2 and PC3 cells without apoptosis. However, at a particular PEG grafting density (∼0.65 chains/nm(2)), none of these severe damages were observed on 3T3 cells indicating discriminating behavior of the healthy (3T3) and cancer (PC3 and CaCo2) cells. It was concluded that the PEG grafting density and hydrodynamic volume, tuned with the PEG concentration and AuNP size, played an important role in particle-cell interactions.
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Affiliation(s)
- Metin Uz
- Department of Chemical Engineering, ‡Department of Bioengineering, and §Biotechnology and Bioengineering Graduate Program, Izmir Institute of Technology , Gulbahce Koyu, Urla, Izmir 35430, Turkey
| | - Volga Bulmus
- Department of Chemical Engineering, ‡Department of Bioengineering, and §Biotechnology and Bioengineering Graduate Program, Izmir Institute of Technology , Gulbahce Koyu, Urla, Izmir 35430, Turkey
| | - Sacide Alsoy Altinkaya
- Department of Chemical Engineering, ‡Department of Bioengineering, and §Biotechnology and Bioengineering Graduate Program, Izmir Institute of Technology , Gulbahce Koyu, Urla, Izmir 35430, Turkey
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42
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Ferebee R, Hakem IF, Koch A, Chen M, Wu Y, Loh D, Wilson DC, Poole JL, Walker JP, Fytas G, Bockstaller MR. Light Scattering Analysis of Mono- and Multi-PEGylated Bovine Serum Albumin in Solution: Role of Composition on Structure and Interactions. J Phys Chem B 2016; 120:4591-9. [DOI: 10.1021/acs.jpcb.6b03097] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Rachel Ferebee
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Ilhem F. Hakem
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Amelie Koch
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Maggie Chen
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Yi Wu
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Derek Loh
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - David C. Wilson
- FLIR Systems, Inc., 2240 William
Pitt Way, Pittsburgh, Pennsylvania 15238, United States
| | - Jennifer L. Poole
- FLIR Systems, Inc., 2240 William
Pitt Way, Pittsburgh, Pennsylvania 15238, United States
| | - Jeremy P. Walker
- FLIR Systems, Inc., 2240 William
Pitt Way, Pittsburgh, Pennsylvania 15238, United States
| | - George Fytas
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Michael R. Bockstaller
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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Yamada K, Yokomaku K, Haruki R, Taguchi K, Nagao S, Maruyama T, Otagiri M, Komatsu T. Influence of Molecular Structure on O2-Binding Properties and Blood Circulation of Hemoglobin‒Albumin Clusters. PLoS One 2016; 11:e0149526. [PMID: 26895315 PMCID: PMC4760709 DOI: 10.1371/journal.pone.0149526] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 02/02/2016] [Indexed: 11/29/2022] Open
Abstract
A hemoglobin wrapped covalently by three human serum albumins, a Hb-HSA3 cluster, is an artificial O2-carrier with the potential to function as a red blood cell substitute. This paper describes the synthesis and O2-binding properties of new hemoglobin‒albumin clusters (i) bearing four HSA units at the periphery (Hb-HSA4, large-size variant) and (ii) containing an intramolecularly crosslinked Hb in the center (XLHb-HSA3, high O2-affinity variant). Dynamic light scattering measurements revealed that the Hb-HSA4 diameter is greater than that of either Hb-HSA3 or XLHb-HSA3. The XLHb-HSA3 showed moderately high O2-affinity compared to the others because of the chemical linkage between the Cys-93(β) residues in Hb. Furthermore, the blood circulation behavior of 125I-labeled clusters was investigated by assay of blood retention and tissue distribution after intravenous administration into anesthetized rats. The XLHb-HSA3 was metabolized faster than Hb-HSA3 and Hb-HSA4. Results suggest that the molecular structure of the protein cluster is a factor that can influence in vivo circulation behavior.
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Affiliation(s)
- Kana Yamada
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112–8551, Japan
| | - Kyoko Yokomaku
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112–8551, Japan
| | - Risa Haruki
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112–8551, Japan
| | - Kazuaki Taguchi
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1, Ikeda, Nishi-ku, Kumamoto, 860–0082, Japan
| | - Saori Nagao
- Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5–1 Oe-Honmachi, Chuo-ku, Kumamoto, 862–0973, Japan
| | - Toru Maruyama
- Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5–1 Oe-Honmachi, Chuo-ku, Kumamoto, 862–0973, Japan
| | - Masaki Otagiri
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1, Ikeda, Nishi-ku, Kumamoto, 860–0082, Japan
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112–8551, Japan
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44
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Le Cœur C, Combet S, Carrot G, Busch P, Teixeira J, Longeville S. Conformation of the Poly(ethylene Glycol) Chains in DiPEGylated Hemoglobin Specifically Probed by SANS: Correlation with PEG Length and in Vivo Efficiency. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8402-8410. [PMID: 26153251 DOI: 10.1021/acs.langmuir.5b01121] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cell-free hemoglobin (Hb)-based oxygen carriers have long been proposed as blood substitutes but their clinical use remains tricky due to problems of inefficiency and/or toxicity. Conjugation of Hb with the biocompatible polymer poly(ethylene glycol) (PEG) greatly improved their performance. However, physiological data suggested a polymer molecular weight (Mw) threshold of about 10 kDa, beyond which the grafting of two PEG chains no longer improves efficiency and nontoxicity of diPEG/Hb conjugates. We used small-angle neutron scattering and contrast variation, which are the only techniques able to probe separately the conformation of PEG chains and Hb protein within the complex, to investigate the role of PEG chain conformation in diPEGylated Hb conjugates as a function of the polymer Mw. We found out that the structure of Hb tetramer is not modified by the polymer grafting. Similarly, with a constant grafting of two chains per protein, there is no significant change of the Gaussian conformation between free and grafted PEG below ∼10 kDa, the complex being well described by the "dumbbell" model. However, beyond that threshold, the radius of gyration of grafted PEG is significantly smaller than that of the free polymer, showing a compaction of the PEG chains, either in the "dumbbell" model or in the "shroud" one. In the latter model, the polymer may be wrapped on the surface of the protein spreading a protective "shielding" effect over a larger fraction of the protein. Both proposed models are in good agreement with the physiological data reported in the literature.
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Affiliation(s)
- Clémence Le Cœur
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Sophie Combet
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Géraldine Carrot
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Peter Busch
- ‡Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstrasse 1, D-85747 Garching, Germany
| | - José Teixeira
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Stéphane Longeville
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
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Abstract
A hemoglobin (Hb) wrapped covalently by human serum albumins (HSAs), a core-shell structured hemoglobin-albumin cluster designated as "HemoAct", is an O2-carrier designed for use as a red blood cell (RBC) substitute. This report describes the blood compatibility, hemodynamic response, and pharmacokinetic properties of HemoAct, and then explains its preclinical safety. Viscosity and blood cell counting measurements revealed that HemoAct has good compatibility with whole blood. Intravenous administration of HemoAct into anesthetized rats elicited no unfavorable increase in systemic blood pressure by vasoconstriction. The half-life of (125)I-labeled HemoAct in circulating blood is markedly longer than that of HSA. Serum biochemical tests conducted 7 days after HemoAct infusion yielded equivalent values to those observed in the control group with HSA. Histopathologic inspections of the vital organs revealed no marked abnormality in their tissues. All results indicate that HemoAct has sufficient preclinical safety as an alternative material for RBC transfusion.
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Kimura T, Shinohara R, Böttcher C, Komatsu T. Core–shell clusters of human haemoglobin A and human serum albumin: artificial O2-carriers having various O2-affinities. J Mater Chem B 2015; 3:6157-6164. [DOI: 10.1039/c5tb00540j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Core–shell clusters composed of human haemoglobin A and human serum albumin having various O2-affinities have been synthesized as potential O2-carriers designed as red blood cell substitutes.
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Affiliation(s)
- Takuya Kimura
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Chuo University
- Bunkyo-ku
- Japan
| | - Ryuichi Shinohara
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Chuo University
- Bunkyo-ku
- Japan
| | - Christoph Böttcher
- Research Centre of Electron Microscopy
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- Germany
| | - Teruyuki Komatsu
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Chuo University
- Bunkyo-ku
- Japan
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Gao J, Chen P, Singh Y, Zhang X, Szekely Z, Stein S, Sinko PJ. Novel monodisperse PEGtide dendrons: design, fabrication, and evaluation of mannose receptor-mediated macrophage targeting. Bioconjug Chem 2014; 24:1332-44. [PMID: 23808323 DOI: 10.1021/bc400011v] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Novel PEGtide dendrons of generations 1 through 5 (G1.0–5.0) containing alternating discrete poly(ethylene glycol) (dPEG) and amino acid/peptide moieties were designed and developed. To demonstrate their targeting utility as nanocarriers, PEGtide dendrons functionalized with mannose residues were developed and evaluated for macrophage targeting. PEGtide dendrons were synthesized using 9-fluorenylmethyloxycarbonyl (Fmoc) solid-phase peptide synthesis (SPPS) protocols. The N-α-Fmoc-N-ε-(5-carboxyfluorescein)-l-lysine (Fmoc-Lys(5-FAM)-OH) and monodisperse Fmoc-dPEG6-OH were sequentially coupled to Fmoc-β-Ala-resin to obtain the resin-bound intermediate Fmoc-dPEG6-Lys(5-FAM)-β-Ala (1). G1.0 dendrons were obtained by sequentially coupling Fmoc-Lys(Fmoc)-OH, Fmoc-β-Ala-OH, and Fmoc-dPEG6-OH to 1. Dendrons of higher generation, G2.0–5.0, were obtained by repeating the coupling cycles used for the synthesis of G1.0. Dendrons containing eight mannose residues (G3.0-mannose8) were developed for mannose receptor (MR) mediated macrophage targeting by conjugating α-d-mannopyranosylphenyl isothiocyanate to G3.0 dendrons. In the present study PEGtide dendrons up to G5.0 were synthesized. The molecular weights of the dendrons determined by MALDI-TOF were in agreement with calculated values. The hydrodynamic diameters measured using dynamic light scattering (DLS) ranged from 1 to 8 nm. Cell viability in the presence of G3.0 and G3.0-mannose8 was assessed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and was found to be statistically indistinguishable from that of untreated cells. G3.0-mannose8 exhibited 12-fold higher uptake than unmodified G3.0 control dendrons in MR-expressing J774.E murine macrophage-like cells. Uptake was nearly completely inhibited in the presence of 10 mg/mL mannan, a mannose analogue and known MR substrate. Confocal microscopy studies demonstrated the presence of significant intracellular punctate fluorescence colocalized with a fluid endocytosis marker with little surface fluorescence in cells incubated with G3.0-mannose8. No significant cell-associated fluorescence was observed in cells incubated with G3.0 dendrons that did not contain the targeting ligand mannose. The current studies suggest that PEGtide dendrons could be useful as nanocarriers in drug delivery and imaging applications.
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Reversible protection of Cys-93(β) by PEG alters the structural and functional properties of the PEGylated hemoglobin. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:1201-7. [DOI: 10.1016/j.bbapap.2014.04.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 04/02/2014] [Accepted: 04/07/2014] [Indexed: 11/24/2022]
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49
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Pfister D, Morbidelli M. Process for protein PEGylation. J Control Release 2014; 180:134-49. [DOI: 10.1016/j.jconrel.2014.02.002] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 01/31/2014] [Accepted: 02/03/2014] [Indexed: 11/25/2022]
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50
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Meng F, Tsai AG, Intaglietta M, Acharya SA. PEGylation of αα-Hb using succinimidyl propionic acid PEG 5K: Conjugation chemistry and PEG shell structure dictate respectively the oxygen affinity and resuscitation fluid like properties of PEG αα-Hbs. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 43:270-81. [PMID: 24597567 DOI: 10.3109/21691401.2014.885443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PEGylation of intramolecularly crosslinked Hb has been studied here to overcome the limitation of dissociation of Hb tetramers. New hexa and deca PEGylated low oxygen affinity PEG-ααHbs have been generated. Influence of PEG conjugation chemistry and the PEG shell structure on the functional properties as well as PEGylation induced plasma expander like properties of the protein has been delineated. The results have established that in the design of PEG-Hbs as oxygen therapeutics, the influence of conjugation chemistry and the PEG shell structure on the oxygen affinity of Hb needs to be optimized independently besides optimizing the PEG shell structure for inducing resuscitation fluid like properties.
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Affiliation(s)
- Fantao Meng
- Hematology Division, Department of Medicine, Albert Einstein College of Medicine of Yeshiva University , Bronx, NY , USA
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