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Kapil K, Murata H, Szczepaniak G, Russell AJ, Matyjaszewski K. Tailored Branched Polymer-Protein Bioconjugates for Tunable Sieving Performance. ACS Macro Lett 2024; 13:461-467. [PMID: 38574342 PMCID: PMC11025119 DOI: 10.1021/acsmacrolett.4c00059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/28/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
Protein-polymer conjugates combine the unique properties of both proteins and synthetic polymers, making them important materials for biomedical applications. In this work, we synthesized and characterized protein-branched polymer bioconjugates that were precisely designed to retain protein functionality while preventing unwanted interactions. Using chymotrypsin as a model protein, we employed a controlled radical branching polymerization (CRBP) technique utilizing a water-soluble inibramer, sodium 2-bromoacrylate. The green-light-induced atom transfer radical polymerization (ATRP) enabled the grafting of branched polymers directly from the protein surface in the open air. The resulting bioconjugates exhibited a predetermined molecular weight, well-defined architecture, and high branching density. Conformational analysis by SEC-MALS validated the controlled grafting of branched polymers. Furthermore, enzymatic assays revealed that densely grafted polymers prevented protein inhibitor penetration, and the resulting conjugates retained up to 90% of their enzymatic activity. This study demonstrates a promising strategy for designing protein-polymer bioconjugates with tunable sieving behavior, opening avenues for applications in drug delivery and biotechnology.
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Affiliation(s)
- Kriti Kapil
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Hironobu Murata
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Grzegorz Szczepaniak
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Alan J. Russell
- Amgen
Research, 1 Amgen Center
Drive, Thousand Oaks, California 91320, United States
| | - Krzysztof Matyjaszewski
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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2
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Heier CR, McCormack NM, Tully CB, Novak JS, Newell‐Stamper BL, Russell AJ, Fiorillo AA. The X-linked Becker muscular dystrophy (bmx) mouse models Becker muscular dystrophy via deletion of murine dystrophin exons 45-47. J Cachexia Sarcopenia Muscle 2023; 14:940-954. [PMID: 36628607 PMCID: PMC10067474 DOI: 10.1002/jcsm.13171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 11/22/2022] [Accepted: 12/04/2022] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Becker muscular dystrophy (BMD) is a genetic neuromuscular disease of growing importance caused by in-frame, partial loss-of-function mutations in the dystrophin (DMD) gene. BMD presents with reduced severity compared with Duchenne muscular dystrophy (DMD), the allelic disorder of complete dystrophin deficiency. Significant therapeutic advancements have been made in DMD, including four FDA-approved drugs. BMD, however, is understudied and underserved-there are no drugs and few clinical trials. Discordance in therapeutic efforts is due in part to lack of a BMD mouse model which would enable greater understanding of disease and de-risk potential therapeutics before first-in-human trials. Importantly, a BMD mouse model is becoming increasingly critical as emerging DMD dystrophin restoration therapies aim to convert a DMD genotype into a BMD phenotype. METHODS We use CRISPR/Cas9 technology to generate bmx (Becker muscular dystrophy, X-linked) mice, which express an in-frame ~40 000 bp deletion of exons 45-47 in the murine Dmd gene, reproducing the most common BMD patient mutation. Here, we characterize muscle pathogenesis using molecular and histological techniques and then test skeletal muscle and cardiac function using muscle function assays and echocardiography. RESULTS Overall, bmx mice present with significant muscle weakness and heart dysfunction versus wild-type (WT) mice, despite a substantial improvement in pathology over dystrophin-null mdx52 mice. bmx mice show impaired motor function in grip strength (-39%, P < 0.0001), wire hang (P = 0.0025), and in vivo as well as ex vivo force assays. In aged bmx, echocardiography reveals decreased heart function through reduced fractional shortening (-25%, P = 0.0036). Additionally, muscle-specific serum CK is increased >60-fold (P < 0.0001), indicating increased muscle damage. Histologically, bmx muscles display increased myofibre size variability (minimal Feret's diameter: P = 0.0017) and centrally located nuclei indicating degeneration/regeneration (P < 0.0001). bmx muscles also display dystrophic pathology; however, levels of the following parameters are moderate in comparison with mdx52: inflammatory/necrotic foci (P < 0.0001), collagen deposition (+1.4-fold, P = 0.0217), and sarcolemmal damage measured by intracellular IgM (P = 0.0878). Like BMD patients, bmx muscles show reduced dystrophin protein levels (~20-50% of WT), whereas Dmd transcript levels are unchanged. At the molecular level, bmx muscles express increased levels of inflammatory genes, inflammatory miRNAs and fibrosis genes. CONCLUSIONS The bmx mouse recapitulates BMD disease phenotypes with histological, molecular and functional deficits. Importantly, it can inform both BMD pathology and DMD dystrophin restoration therapies. This novel model will enable further characterization of BMD disease progression, identification of biomarkers, identification of therapeutic targets and new preclinical drug studies aimed at developing therapies for BMD patients.
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Affiliation(s)
- Christopher R. Heier
- Center for Genetic Medicine ResearchChildren's National HospitalWashingtonDCUSA
- Department of Genomics and Precision MedicineGeorge Washington University School of Medicine and Health SciencesWashingtonDCUSA
| | - Nikki M. McCormack
- Center for Genetic Medicine ResearchChildren's National HospitalWashingtonDCUSA
| | | | - James S. Novak
- Center for Genetic Medicine ResearchChildren's National HospitalWashingtonDCUSA
- Department of Genomics and Precision MedicineGeorge Washington University School of Medicine and Health SciencesWashingtonDCUSA
| | | | - Alan J. Russell
- Edgewise Therapeutics, BioFrontiers InstituteUniversity of ColoradoBoulderCO80303USA
| | - Alyson A. Fiorillo
- Center for Genetic Medicine ResearchChildren's National HospitalWashingtonDCUSA
- Department of Genomics and Precision MedicineGeorge Washington University School of Medicine and Health SciencesWashingtonDCUSA
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3
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Russell AJ, DuVall M, Barthel B, Qian Y, Peter AK, Newell-Stamper BL, Hunt K, Lehman SJ, Madden MR, Schlachter ST, Robertson BD, Van Deusen A, Rodriguez HM, Vera CD, Su Y, Claflin DR, Brooks SV, Nghiem PP, Rutledge A, Juehne TI, Yu J, Barton ER, Luo YE, Patsalos A, Nagy L, Sweeney HL, Leinwand LA, Koch K. Modulating fast skeletal muscle contraction protects skeletal muscle in animal models of Duchenne muscular dystrophy. J Clin Invest 2023; 133:153837. [PMID: 36995778 PMCID: PMC10178848 DOI: 10.1172/jci153837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/24/2023] [Indexed: 03/31/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is a lethal muscle disease caused by absence of the protein dystrophin, which acts as a structural link between the basal lamina and contractile machinery to stabilize muscle membranes from mechanical stress. In DMD, mechanical stress leads to exaggerated membrane injury and fiber breakdown, with fast fibers being the most susceptible to damage. A major contributor to this injury is muscle contraction, controlled by the motor protein myosin. However, the relationship between how muscle contraction and fast muscle fiber damage contribute to the pathophysiology of DMD has not been well characterized. We explored the role of fast skeletal muscle contraction in DMD with a novel, selective, orally active inhibitor of fast skeletal muscle myosin, EDG-5506. Surprisingly, even modest decreases of contraction (<15%) were sufficient to protect skeletal muscles in dystrophic mdx mice from stress injury. Longer-term treatment also decreased muscle fibrosis in key disease-implicated tissues. Importantly, therapeutic levels of myosin inhibition with EDG-5506 did not detrimentally affect strength or coordination. Finally, in dystrophic dogs, EDG-5506 reversibly reduced circulating muscle injury biomarkers and increased habitual activity. This unexpected biology may represent an important alternative treatment strategy for Duchenne and related myopathies.
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Affiliation(s)
- Alan J Russell
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Mike DuVall
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Benjamin Barthel
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Ying Qian
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Angela K Peter
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | | | - Kevin Hunt
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Sarah J Lehman
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Molly R Madden
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Stephen T Schlachter
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Benjamin D Robertson
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | - Ashleigh Van Deusen
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
| | | | - Carlos D Vera
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, United States of America
| | - Yu Su
- Molecular and Integrative Physiology, The University of Michigan, Ann Arbor, United States of America
| | - Dennis R Claflin
- Department of Surgery, Section of Plastic Surgery, The University of Michigan, Ann Arbor, United States of America
| | - Susan V Brooks
- Molecular and Integrative Physiology, The University of Michigan, Ann Arbor, United States of America
| | - Peter P Nghiem
- College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, United States of America
| | - Alexis Rutledge
- College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, United States of America
| | - Twlya I Juehne
- Genome Technology Access Center, Department of Genetics, Washington University in Saint Louis, School of Medicine, St. Louis, United States of America
| | - Jinsheng Yu
- Genome Technology Access Center, Department of Genetics, Washington University in Saint Louis, School of Medicine, St. Louis, United States of America
| | - Elisabeth R Barton
- Department of Applied Physiology and Kinesiology and Myology Institute, University of Florida College of Health and Human Performance, Gainesville, United States of America
| | - Yangyi E Luo
- Department of Applied Physiology and Kinesiology and Myology Institute, University of Florida College of Health and Human Performance, Gainesville, United States of America
| | - Andreas Patsalos
- Departments of Medicine and Biological Chemistry, IFBR, John Hopkins University Medical School, St. Petersburg, United States of America
| | - Laszlo Nagy
- Departments of Medicine and Biological Chemistry, IFBR, John Hopkins University Medical School, St. Petersburg, United States of America
| | - H Lee Sweeney
- Department of Pharmacology & Therapeutics and Myology Institute, University of Florida College of Medicine, Gainesville, United States of America
| | - Leslie A Leinwand
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, United States of America
| | - Kevin Koch
- BioFrontiers Institute, Edgewise Therapeutics, Boulder, United States of America
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4
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Mohan D, Rossiter H, Watz H, Fogarty C, Evans RA, Man W, Tabberer M, Beerahee M, Kumar S, Millns H, Thomas S, Tal-Singer R, Russell AJ, Holland MC, Akinseye C, Neil D, Polkey MI. Selective androgen receptor modulation for muscle weakness in chronic obstructive pulmonary disease: a randomised control trial. Thorax 2023; 78:258-266. [PMID: 36283827 PMCID: PMC9985744 DOI: 10.1136/thorax-2021-218360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 08/26/2022] [Indexed: 02/18/2023]
Abstract
BACKGROUND Selective androgen receptor modulators (SARMs) increase muscle mass via the androgen receptor. This phase 2A trial investigated the effects of a SARM, GSK2881078, in conjunction with exercise, on leg strength in patients with chronic obstructive pulmonary disease (COPD) and impaired physical function. METHODS 47 postmenopausal women and 50 men with COPD (forced expiratory volume in 1 s 30%-65% predicted; short physical performance battery score: 3-11) were enrolled into a randomised double-blind, placebo control trial. Patients were randomised 1:1 to once daily placebo or oral GSK2881078 (females: 1.0 mg; males: 2.0 mg) for 13 weeks with a concurrent home-exercise programme, involving strength training and physical activity. Primary endpoints were change from baseline in leg strength at 90 days (one-repetition maximum; absolute (kg) and relative (% change)) and multiple safety outcomes. Secondary endpoints included lean body mass, physical function and patient-reported outcomes. RESULTS GSK2881078 increased leg strength in men. The difference in adjusted mean change from baseline and adjusted mean percentage change from baseline between treatment and placebo were: for women, 8.0 kg (90% CI -2.5 to 18.4) and 5.2% (90% CI -4.7 to 15.0), respectively; for men, 11.8 kg (90% CI -0.5 to 24.0) and 7.0% (90% CI 0.5 to 13.6), respectively. Lean body mass increased, but no changes in patient-reported outcomes were observed. Reversible reductions in high-density lipoprotein-cholesterol and transient elevations in hepatic transaminases were the main treatment-related safety findings. CONCLUSIONS GSK2881078 was well tolerated and short-term treatment increased leg strength, when expressed as per cent predicted, in men with COPD more than physical training alone. TRIAL REGISTRATION NUMBER NCT03359473.
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Affiliation(s)
- Divya Mohan
- GlaxoSmithKline USA, Collegeville, Pennsylvania, USA
| | | | - Henrik Watz
- German Center for Lung Research, Giessen, Germany
| | - Charles Fogarty
- Spartanburg Medical Research, Spartanburg, South Carolina, USA
| | - Rachael A Evans
- Respiratory Medicine, University of Leicester, Leicester, UK
| | - William Man
- Respiratory Medicine, Imperial College London, London, UK
| | | | | | | | - Helen Millns
- GlaxoSmithKline Research and Development, Stevenage, UK
| | - Sebin Thomas
- Department of Biostatistics and Programming, GlaxoSmithKline plc, Bangalore, India
| | | | | | | | | | - David Neil
- GlaxoSmithKline USA, Collegeville, Pennsylvania, USA
| | - Michael I Polkey
- Respiratory Medicine, Imperial College London, London, UK
- Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
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5
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Biswas R, Belouski E, Graham K, Hortter M, Mock M, Tinberg CE, Russell AJ. VERITAS: Harnessing the power of nomenclature in biologic discovery. MAbs 2023; 15:2207232. [PMID: 37162235 PMCID: PMC10173791 DOI: 10.1080/19420862.2023.2207232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023] Open
Abstract
We are entering an era in which therapeutic proteins are assembled using building block-like strategies, with no standardized schema to discuss these formats. Existing nomenclatures, like AbML, sacrifice human readability for precision. Therefore, considering even a dozen such formats, in combination with hundreds of possible targets, can create confusion and increase the complexity of drug discovery. To address this challenge, we introduce Verified Taxonomy for Antibodies (VERITAS). This classification and nomenclature scheme is extensible to multispecific therapeutic formats and beyond. VERITAS names are easy to understand while drawing direct connections to the structure of a given format, with or without specific target information, making these names useful to adopt in scientific discourse and as inputs to machine learning algorithms for drug development.
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Affiliation(s)
- Riti Biswas
- Biologic Therapeutic Discovery, Amgen Research, South San Francisco, CA, USA
| | - Ed Belouski
- Biologic Therapeutic Discovery, Amgen Research, Thousand Oaks, CA, USA
| | - Kevin Graham
- Biologic Therapeutic Discovery, Amgen Research, Thousand Oaks, CA, USA
| | - Michelle Hortter
- Biologic Therapeutic Discovery, Amgen Research, Thousand Oaks, CA, USA
| | - Marissa Mock
- Biologic Therapeutic Discovery, Amgen Research, Thousand Oaks, CA, USA
| | - Christine E Tinberg
- Biologic Therapeutic Discovery, Amgen Research, South San Francisco, CA, USA
| | - Alan J Russell
- Biologic Therapeutic Discovery, Amgen Research, Thousand Oaks, CA, USA
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6
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Patel A, Smith PN, Russell AJ, Carmali S. Automated prediction of site and sequence of protein modification with ATRP initiators. PLoS One 2022; 17:e0274606. [PMID: 36121820 PMCID: PMC9484671 DOI: 10.1371/journal.pone.0274606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 08/31/2022] [Indexed: 11/27/2022] Open
Abstract
One of the most straightforward and commonly used chemical modifications of proteins is to react surface amino groups (lysine residues) with activated esters. This chemistry has been used to generate protein-polymer conjugates, many of which are now approved therapeutics. Similar conjugates have also been generated by reacting activated ester atom transfer polymerization initiators with lysine residues to create biomacromolecular initiators for polymerization reactions. The reaction between activated esters and lysine amino groups is rapid and has been consistently described in almost every publication on the topic as a “random reaction”. A random reaction implies that every accessible lysine amino group on a protein molecule is equally reactive, and as a result, that the reaction is indiscriminate. Nonetheless, the literature contradicts itself by also suggesting that some lysine amino groups are more reactive than others (as a function of pKa, surface accessibility, temperature, and local environment). If the latter assumption is correct, then the outcome of these reactions cannot be random at all, and we should be able to predict the outcome from the structure of the protein. Predicting the non-random outcome of a reaction between surface lysines and reactive esters could transform the speed at which active bioconjugates can be developed and engineered. Herein, we describe a robust integrated tool that predicts the activated ester reactivity of every lysine in a protein, thereby allowing us to calculate the non-random sequence of reaction as a function of reaction conditions. Specifically, we have predicted the intrinsic reactivity of each lysine in multiple proteins with a bromine-functionalised N-hydroxysuccinimide initiator molecule. We have also shown that the model applied to PEGylation. The rules-based analysis has been coupled together in a single Python program that can bypass tedious trial and error experiments usually needed in protein-polymer conjugate design and synthesis.
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Affiliation(s)
- Arth Patel
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Paige N. Smith
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Alan J. Russell
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
- Amgen Inc., Thousand Oaks, California, United States of America
| | - Sheiliza Carmali
- School of Pharmacy, Queen’s University Belfast, Belfast, United Kingdom
- * E-mail:
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7
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Mao L, Russell AJ, Carmali S. Moving Protein PEGylation from an Art to a Data Science. Bioconjug Chem 2022; 33:1643-1653. [PMID: 35994522 PMCID: PMC9501918 DOI: 10.1021/acs.bioconjchem.2c00262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
PEGylation is a well-established and clinically proven
half-life
extension strategy for protein delivery. Protein modification with
amine-reactive poly(ethylene glycol) (PEG) generates heterogeneous
and complex bioconjugate mixtures, often composed of several PEG positional
isomers with varied therapeutic efficacy. Laborious and costly experiments
for reaction optimization and purification are needed to generate
a therapeutically useful PEG conjugate. Kinetic models which accurately
predict the outcome of so-called “random” PEGylation
reactions provide an opportunity to bypass extensive wet lab experimentation
and streamline the bioconjugation process. In this study, we propose
a protein tertiary structure-dependent reactivity model that describes
the rate of protein-amine PEGylation and introduces “PEG chain
coverage” as a tangible metric to assess the shielding effect
of PEG chains. This structure-dependent reactivity model was implemented
into three models (linear, structure-based, and machine-learned) to
gain insight into how protein-specific molecular descriptors (exposed
surface areas, pKa, and surface charge)
impacted amine reactivity at each site. Linear and machine-learned
models demonstrated over 75% prediction accuracy with butylcholinesterase.
Model validation with Somavert, PEGASYS, and phenylalanine ammonia
lyase showed good correlation between predicted and experimentally
determined degrees of modification. Our structure-dependent reactivity
model was also able to simulate PEGylation progress curves and estimate
“PEGmer” distribution with accurate predictions across
different proteins, PEG linker chemistry, and PEG molecular weights.
Moreover, in-depth analysis of these simulated reaction curves highlighted
possible PEG conformational transitions (from dumbbell to brush) on the surface of lysozyme, as a function
of PEG molecular weight.
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Affiliation(s)
- Leran Mao
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J Russell
- Amgen Inc., Thousand Oaks, California 91320, United States
| | - Sheiliza Carmali
- School of Pharmacy, Queen's University Belfast, Belfast, BT9 7BL United Kingdom
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Kaupbayeva B, Murata H, Rule GS, Matyjaszewski K, Russell AJ. Rational Control of Protein-Protein Interactions with Protein-ATRP-Generated Protease-Sensitive Polymer Cages. Biomacromolecules 2022; 23:3831-3846. [PMID: 35984406 DOI: 10.1021/acs.biomac.2c00679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protease-protease interactions lie at the heart of the biological cascades that provide rapid molecular responses to living systems. Blood clotting cascades, apoptosis signaling networks, bacterial infection, and virus trafficking have all evolved to be activated and sustained by protease-protease interactions. Biomimetic strategies designed to target drugs to specific locations have generated proprotein drugs that can be activated by proteolytic cleavage to release native protein. We have previously demonstrated that the modification of enzymes with a custom-designed comb-shaped polymer nanoarmor can shield the enzyme surface and eliminate almost all protein-protein interactions. We now describe the synthesis and characterization of protease-sensitive comb-shaped nanoarmor cages using poly(ethylene glycol) [Sundy, J. S. Arthritis Rheum. 2008, 58(9), 2882-2891]methacrylate macromonomers where the PEG tines of the comb are connected to the backbone of the growing polymer chain by peptide linkers. Protease-induced cleavage of the tines of the comb releases a polymer-modified protein that can once again participate in protein-protein interactions. Atom transfer radical polymerization (ATRP) was used to copolymerize the macromonomer and carboxybetaine methacrylate from initiator-labeled chymotrypsin and trypsin enzymes, yielding proprotease conjugates that retained activity toward small peptide substrates but prevented activity against proteins. Native proteases triggered the release of the PEG side chains from the polymer backbone within 20 min, thereby increasing the activity of the conjugate toward larger protein substrates by 100%. Biomimetic cascade initiation of nanoarmored protease-sensitive protein-polymer conjugates may open the door to a new class of responsive targeted therapies.
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Affiliation(s)
- Bibifatima Kaupbayeva
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.,Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.,National Laboratory Astana, Nazarbayev University, Nur-Sultan City 010000, Kazakhstan
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Gordon S Rule
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.,Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J Russell
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.,Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.,Amgen, 1 Amgen Center Drive, Thousand Oaks, California 91320, United States
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9
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Kaupbayeva B, Murata H, Matyjaszewski K, Russell AJ, Boye S, Lederer A. A comprehensive analysis in one run - in-depth conformation studies of protein-polymer chimeras by asymmetrical flow field-flow fractionation. Chem Sci 2021; 12:13848-13856. [PMID: 34760170 PMCID: PMC8549772 DOI: 10.1039/d1sc03033g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/24/2021] [Indexed: 01/04/2023] Open
Abstract
Polymer-based protein engineering has enabled the synthesis of a variety of protein-polymer conjugates that are widely applicable in therapeutic, diagnostic and biotechnological industries. Accurate characterizations of physical-chemical properties, in particular, molar masses, sizes, composition and their dispersities are critical parameters that determine the functionality and conformation of protein-polymer conjugates and are important for creating reproducible manufacturing processes. Most of the current characterization techniques suffer from fundamental limitations and do not provide an accurate understanding of a sample's true nature. In this paper, we demonstrate the advantage of asymmetrical flow field-flow fractionation (AF4) coupled with multiple detectors for the characterization of a library of complex, zwitterionic and neutral protein-polymer conjugates. This method allows for determination of intrinsic physical properties of protein-polymer chimeras from a single, rapid measurement.
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Affiliation(s)
- Bibifatima Kaupbayeva
- Department of Biological Sciences, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 USA
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 USA
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 USA
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Alan J Russell
- Department of Biological Sciences, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 USA
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
- Department of Chemical Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 USA
| | - Susanne Boye
- Center Macromolecular Structure Analysis, Leibniz-Institut für Polymerforschung Dresden e.V. Hohe Straße 6 Dresden 01069 Germany
| | - Albena Lederer
- Center Macromolecular Structure Analysis, Leibniz-Institut für Polymerforschung Dresden e.V. Hohe Straße 6 Dresden 01069 Germany
- Stellenbosch University, Department of Chemistry and Polymer Science Private Bag X1 Matieland 7602 South Africa
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10
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Kaupbayeva B, Boye S, Munasinghe A, Murata H, Matyjaszewski K, Lederer A, Colina CM, Russell AJ. Molecular Dynamics-Guided Design of a Functional Protein-ATRP Conjugate That Eliminates Protein-Protein Interactions. Bioconjug Chem 2021; 32:821-832. [PMID: 33784809 DOI: 10.1021/acs.bioconjchem.1c00098] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Even the most advanced protein-polymer conjugate therapeutics do not eliminate antibody-protein and receptor-protein recognition. Next-generation bioconjugate drugs will need to replace stochastic selection with rational design to select desirable levels of protein-protein interaction while retaining function. The "Holy Grail" for rational design would be to generate functional enzymes that are fully catalytic with small molecule substrates while eliminating interaction between the protein surface and larger molecules. Using chymotrypsin, an important enzyme that is used to treat pancreatic insufficiency, we have designed a series of molecular chimeras with varied grafting densities and shapes. Guided by molecular dynamic simulations and next-generation molecular chimera characterization with asymmetric flow field-flow fractionation chromatography, we grew linear, branched, and comb-shaped architectures from the surface of the protein by atom-transfer radical polymerization. Comb-shaped polymers, grafted from the surface of chymotrypsin, completely prevented enzyme inhibition with protein inhibitors without sacrificing the ability of the enzyme to catalyze the hydrolysis of a peptide substrate. Asymmetric flow field-flow fractionation coupled with multiangle laser light scattering including dynamic light scattering showed that nanoarmor designed with comb-shaped polymers was particularly compact and spherical. The polymer structure significantly increased protein stability and reduced protein-protein interactions. Atomistic molecular dynamic simulations predicted that a dense nanoarmor with long-armed comb-shaped polymer would act as an almost perfect molecular sieve to filter large ligands from substrates. Surprisingly, a conjugate that was composed of 99% polymer was needed before the elimination of protein-protein interactions.
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Affiliation(s)
- Bibifatima Kaupbayeva
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.,Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Susanne Boye
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, Dresden 01069, Germany
| | - Aravinda Munasinghe
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.,George & Josephine Butler Polymer Research Laboratory, University of Florida, Gainesville, Florida 32611, United States
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Albena Lederer
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, Dresden 01069, Germany.,Technische Universität Dresden, 01062, Dresden, Germany.,Stellenbosch University, Department of Chemistry and Polymer Science, Private Bag X1, Matieland 7602, South Africa
| | - Coray M Colina
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.,George & Josephine Butler Polymer Research Laboratory, University of Florida, Gainesville, Florida 32611, United States.,Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Alan J Russell
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.,Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.,Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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11
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Barthel BL, Cox D, Barbieri M, Ziemba M, Straub V, Hoffman EP, Russell AJ. Elevation of fast but not slow troponin I in the circulation of patients with Becker and Duchenne muscular dystrophy. Muscle Nerve 2021; 64:43-49. [PMID: 33683712 PMCID: PMC8362156 DOI: 10.1002/mus.27222] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 03/04/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022]
Abstract
Introduction One of the hallmarks of injured skeletal muscle is the appearance of elevated skeletal muscle proteins in circulation. Human skeletal muscle generally consists of a mosaic of slow (type I) and fast (type IIa, IIx/d) fibers, defined by their myosin isoform expression. Recently, measurement of circulating fiber‐type specific isoforms of troponin I has been used as a biomarker to suggest that muscle injury in healthy volunteers (HV) results in the appearance of muscle proteins from fast but not slow fibers. We sought to understand if this is also the case in severe myopathy patients with Becker and Duchenne muscular dystrophy (BMD, DMD). Methods An enzyme‐linked immunosorbent assay (ELISA) that selectively measures fast and slow skeletal troponin I (TNNI2 and TNNI1) was used to measure a cross‐section of patient plasma samples from HV (N = 50), BMD (N = 49), and DMD (N = 132) patients. Creatine kinase (CK) activity was also measured from the same samples for comparison. Results TNNI2 was elevated in BMD and DMD and correlated with the injury biomarker, CK. In contrast, TNNI1 levels were indistinguishable from levels in HV. There was an inverse relationship between CK and TNNI2 levels and age, but no relationship for TNNI1. Discussion We define a surprising discrepancy between TNNI1 and TNNI2 in patient plasma that may have implications for the interpretation of elevated muscle protein levels in dystrophinopathies. See Editorial on pages 4–5 in this issue.
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Affiliation(s)
- Benjamin L Barthel
- Edgewise Therapeutics, BioFrontiers Institute, University of Colorado, Boulder, Colorado, USA
| | - Dan Cox
- The John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Marissa Barbieri
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, Binghamton University - State University of New York, Binghamton, New York, USA
| | - Michael Ziemba
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, Binghamton University - State University of New York, Binghamton, New York, USA
| | - Volker Straub
- The John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Eric P Hoffman
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, Binghamton University - State University of New York, Binghamton, New York, USA
| | - Alan J Russell
- Edgewise Therapeutics, BioFrontiers Institute, University of Colorado, Boulder, Colorado, USA
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12
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Wood AR, Garg R, Cohen-Karni T, Russell AJ, LeDuc P. Toward sustainable desalination using food waste: capacitive desalination with bread-derived electrodes. RSC Adv 2021; 11:9628-9637. [PMID: 35423429 PMCID: PMC8695462 DOI: 10.1039/d0ra10763h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 02/20/2021] [Indexed: 12/22/2022] Open
Abstract
Each year approximately 1.3 billion tons of food is either wasted or lost. One of the most wasted foods in the world is bread. The ability to reuse wasted food in another area of need, such as water scarcity, would provide a tremendous sustainable outcome. To address water scarcity, many areas of the world are now implementing desalination. One desalination technology that could benefit from food waste reuse is capacitive deionization (CDI). CDI has emerged as a powerful desalination technology that essentially only requires a pair of electrodes and a low-voltage power supply. Developing freestanding carbon electrodes from food waste could lower the overall cost of CDI systems and the environmental and economic impact from food waste. We created freestanding CDI electrodes from bread. The electrodes possessed a hierarchical pore structure that enabled both high salt adsorption capacity and one of the highest reported values for hydraulic permeability to date in a flow-through CDI system. We also developed a sustainable technique for electrode fabrication that does not require the use of common laboratory equipment and could be deployed in decentralized locations and developing countries with low-financial resources.
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Affiliation(s)
- Adam R Wood
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA +1 412-268-2504
- Department of Engineering, Saint Vincent College, Latrobe Pennsylvania 15650 USA
| | - Raghav Garg
- Department of Material Science and Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
| | - Tzahi Cohen-Karni
- Department of Material Science and Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
- Department of Biomedical Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh Pennsylvania 15213 USA +1412-268-9607
| | - Alan J Russell
- Department of Biomedical Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh Pennsylvania 15213 USA +1412-268-9607
- Departments of Chemical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
- Departments of Chemistry Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
| | - Philip LeDuc
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA +1 412-268-2504
- Department of Biomedical Engineering, Carnegie Mellon University 5000 Forbes Avenue Pittsburgh Pennsylvania 15213 USA +1412-268-9607
- Department of Biological Sciences, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
- Department of Computational Biology, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
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13
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Payne K, Maras KL, Russell AJ, Brosnan MJ, Mills R. Self-reported motivations for engaging or declining to engage in cyber-dependent offending and the role of autistic traits. Res Dev Disabil 2020; 104:103681. [PMID: 32474231 DOI: 10.1016/j.ridd.2020.103681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 04/29/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
Cyber-dependent offending, i.e. criminal behaviour reliant on computing and the online domain, has been reportedly associated with particular characteristics and motivations such as being young, male, autistic and motivated by challenge. These associations are anecdotal however and empirical evidence is limited. The present study investigated reasons for engaging or declining to commit cyber-dependent offending in cyber-skilled non-offenders (n = 175) and offenders (n = 7) via an online survey measuring cyber-dependent criminality. The potential role of autism and autistic traits was also considered. Qualitative interviews about motivations for offending were carried out with the offenders. The cyber-dependent offenders reported seven main reasons for engaging in cyber-dependent offending: (1) lack of understanding; (2) entertainment; (3) peer influence; (4) experience and career; (5) anonymity and risk perception; (6) life events; and (7) morals. Twenty-nine (approximately 17 %) of the non-offenders had been asked to engage in cyber-dependent offending but had declined. Their reasons and motivations for declining to commit cyber-dependent offences were compared with the cyber-dependent offenders reasons and motivations for engaging in cybercrime. Seven main reasons for declining to offend were identified: (1) moral principles; (2) perception of risk; (3) fear of consequences; (4) not wanting to; (5) wanting to adhere to the law; (6) behaviour being too complicated; and (7) price being too low. Implications for practise are discussed.
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Affiliation(s)
- K Payne
- University of Northampton, UK.
| | - K L Maras
- University of Northampton, UK; Centre for Applied Autism Research, Department of Psychology, University of Bath, UK
| | - A J Russell
- Centre for Applied Autism Research, Department of Psychology, University of Bath, UK
| | - M J Brosnan
- Centre for Applied Autism Research, Department of Psychology, University of Bath, UK
| | - R Mills
- Centre for Applied Autism Research, Department of Psychology, University of Bath, UK
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Zhang L, Murata H, Amitai G, Smith PN, Matyjaszewski K, Russell AJ. Catalytic Detoxification of Organophosphorus Nerve Agents by Butyrylcholinesterase-Polymer-Oxime Bioscavengers. Biomacromolecules 2020; 21:3867-3877. [DOI: 10.1021/acs.biomac.0c00959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Libin Zhang
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Gabriel Amitai
- Wohl Drug Discovery Institute, Nancy and Stephen Grand Israel National Center for Personalized Medicine (G-INCPM), Weizmann Institute of Science, Rehovot 760001, Israel
| | - Paige N. Smith
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J. Russell
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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Glassman PM, Villa CH, Ukidve A, Zhao Z, Smith P, Mitragotri S, Russell AJ, Brenner JS, Muzykantov VR. Vascular Drug Delivery Using Carrier Red Blood Cells: Focus on RBC Surface Loading and Pharmacokinetics. Pharmaceutics 2020; 12:E440. [PMID: 32397513 PMCID: PMC7284780 DOI: 10.3390/pharmaceutics12050440] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 04/30/2020] [Accepted: 05/08/2020] [Indexed: 01/26/2023] Open
Abstract
Red blood cells (RBC) have great potential as drug delivery systems, capable of producing unprecedented changes in pharmacokinetics, pharmacodynamics, and immunogenicity. Despite this great potential and nearly 50 years of research, it is only recently that RBC-mediated drug delivery has begun to move out of the academic lab and into industrial drug development. RBC loading with drugs can be performed in several ways-either via encapsulation within the RBC or surface coupling, and either ex vivo or in vivo-depending on the intended application. In this review, we briefly summarize currently used technologies for RBC loading/coupling with an eye on how pharmacokinetics is impacted. Additionally, we provide a detailed description of key ADME (absorption, distribution, metabolism, elimination) changes that would be expected for RBC-associated drugs and address unique features of RBC pharmacokinetics. As thorough understanding of pharmacokinetics is critical in successful translation to the clinic, we expect that this review will provide a jumping off point for further investigations into this area.
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Affiliation(s)
- Patrick M. Glassman
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA 19104, USA; (C.H.V.); (J.S.B.)
| | - Carlos H. Villa
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA 19104, USA; (C.H.V.); (J.S.B.)
| | - Anvay Ukidve
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA; (A.U.); (Z.Z.); (S.M.)
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Zongmin Zhao
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA; (A.U.); (Z.Z.); (S.M.)
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Paige Smith
- Disruptive Health Technology Institute, Carnegie Mellon University, Pittsburgh, PA 15213, USA; (P.S.); (A.J.R.)
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Samir Mitragotri
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA; (A.U.); (Z.Z.); (S.M.)
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Alan J. Russell
- Disruptive Health Technology Institute, Carnegie Mellon University, Pittsburgh, PA 15213, USA; (P.S.); (A.J.R.)
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Jacob S. Brenner
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA 19104, USA; (C.H.V.); (J.S.B.)
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Vladimir R. Muzykantov
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania; Philadelphia, PA 19104, USA; (C.H.V.); (J.S.B.)
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Kadekawa K, Kawamorita N, Shimizu T, Kurobe M, Turnbull PS, Chandra S, Kambara T, Barton JC, Russell AJ, Yoshimura N. Effects of a selective androgen receptor modulator (SARM), GSK2849466A, on stress urinary incontinence and bladder activity in rats with ovariectomy-induced oestrogen deficiency. BJU Int 2020; 125:911-919. [PMID: 32011085 DOI: 10.1111/bju.15022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To report the effect of a selective androgen receptor modulators (SARMs) on the urethral continence mechanisms in a rat model of stress urinary incontinence (SUI) induced by bilateral ovariectomy (OVX). MATERIALS AND METHODS Female Sprague-Dawley rats with bilateral OVX were used. Rats were divided into five groups; sham operated, vehicle-treated OVX, low-dose SARM-treated OVX (GSK2849466A: 0.005 mg/kg/day, per os [p.o.]), high-dose SARM-treated OVX (GSK2849466A: 0.03 mg/kg/day, p.o.) and dihydrotestosterone (DHT)-treated OVX (1 mg/kg/day, subcutaneous) groups. After 4 weeks of SARM treatments or 3 weeks of DHT treatment (6 weeks after OVX), rats were subjected to evaluation of the sneeze-induced continence reflex using microtransducer-tipped catheter methods, sneeze-induced leak-point pressure, and continuous cystometry measurements, followed by histological analyses of urethral tissues. RESULTS (i) OVX significantly impaired urethral continence function after 6 weeks to induce SUI during sneezing. (ii) Low-dose SARM treatment restored urethral baseline pressure (UBP) without affecting the amplitude of urethral response during sneezing (A-URS), partially reversing OVX-induced SUI during sneezing. (iii) High-dose SARM treatment reversed decreases in both UBP and A-URS, more effectively preventing SUI during sneezing. (iv) DHT treatment only restored A-URS without affecting UBP, partially preventing OVX-induced SUI during sneezing. (v) The high-dose SARM treatment induced hypertrophy of the striated and smooth muscle around the urethra. (vi) SARM treatment did not affect bladder function in sham or OVX rats. CONCLUSION Treatment with SARMs could be a more effective modality for the treatment of SUI than DHT, without affecting bladder function, by enhancing smooth- and striated muscle-mediated urethral function under stress conditions such as sneezing.
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Affiliation(s)
- Katsumi Kadekawa
- Department of Urology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Naoki Kawamorita
- Department of Urology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Takahiro Shimizu
- Department of Urology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Masahiro Kurobe
- Department of Urology, University of Pittsburgh, Pittsburgh, PA, USA
| | | | - Sundeep Chandra
- Muscle Metabolism DPU, GlaxoSmithKline, King of Prussia, PA, USA
| | - Takahito Kambara
- Pathology, Translational Medicine & Comparative Pathobiology, GlaxoSmithKline, King of Prussia, PA, USA
| | - Joanna C Barton
- Muscle Metabolism DPU, GlaxoSmithKline, King of Prussia, PA, USA
| | - Alan J Russell
- Muscle Metabolism DPU, GlaxoSmithKline, King of Prussia, PA, USA
| | - Naoki Yoshimura
- Department of Urology, University of Pittsburgh, Pittsburgh, PA, USA
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18
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Munasinghe A, Baker SL, Lin P, Russell AJ, Colina CM. Structure-function-dynamics of α-chymotrypsin based conjugates as a function of polymer charge. Soft Matter 2020; 16:456-465. [PMID: 31803897 DOI: 10.1039/c9sm01842e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The field of protein-polymer conjugates has suffered from a lack of predictive tools and design guidelines to synthesize highly active and stable conjugates. In order to develop this type of information, structure-function-dynamics relationships must be understood. These relationships depend strongly on protein-polymer interactions and how these influence protein dynamics and conformations. Probing nanoscale interactions is experimentally difficult, but computational tools, such as molecular dynamics simulations, can easily obtain atomic resolution. Atomistic molecular dynamics simulations were used to study α-chymotrypsin (CT) densely conjugated with either zwitterionic, positively charged, or negatively charged polymers. Charged polymers interacted with the protein surface to varying degrees and in different regions of the polymer, depending on their flexibilities. Specific interactions of the negatively charged polymer with CT caused structural deformations in CT's substrate binding pocket and active site while no deformations were observed for zwitterionic and positively charged polymers. Attachment of polymers displaced water molecules from CT's surface into the polymer phase and polymer hydration correlated with the Hofmeister series.
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Affiliation(s)
- Aravinda Munasinghe
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA.
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19
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Ji W, Smith PN, Koepsel RR, Andersen JD, Baker SL, Zhang L, Carmali S, Myerson JW, Muzykantov V, Russell AJ. Erythrocytes as carriers of immunoglobulin-based therapeutics. Acta Biomater 2020; 101:422-435. [PMID: 31669698 DOI: 10.1016/j.actbio.2019.10.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/18/2019] [Accepted: 10/22/2019] [Indexed: 11/25/2022]
Abstract
The global and economic success of immunoglobulin-based therapeutics in treating a wide range of diseases has heightened the need to further enhance their efficacy and lifetime while diminishing deleterious side effects. The three most ubiquitous challenges of therapeutic immunoglobulin delivery are their relatively short lifetimes in vivo, the immunologic consequences of soluble antibody-antigen complexes, and the emergence of anti-drug antibodies. We describe the rapid, cell-tolerated chemical engineering of the erythrocyte membrane in order to display any antibody, our model system being the display of anti-Tumor Necrosis Factor (anti-TNFα), on the surface of long-lived red blood cells (RBCs) while masking the antibody's Fc region. We developed four synthetic approaches to generate RBC-Staphylococcal protein A (RBC-SpA) complexes: amino group targeting through N-hydrosuccinidyl ester-functionalized homobifunctional poly(ethylene glycol) (NHS-PEG-NHS), direct thiol group targeting using heterobifunctional NHS-PEG-maleimide (NHS-PEG-MAL), converted thiol targeting using heterobifunctional NHS-PEG-MAL, and click chemistry using heterobifunctional NHS-PEG-azido (NHS-PEG-N3) and NHS-PEG-alkyne (NHS-PEG-alk). The RBC-PEG-SpA complexes were formed within minutes, followed by the attachment of over 105 antibodies per RBC to the accessible RBC-bound SpA via Fc-Protein A coupling. The RBC-PEG-SpA-antibody arrays were shown to be stable for more than 60 days in PBS and for more than 42 days in serum containing buffer. RBC-PEG-SpA-antibody complexes were shown to remove TNFα from physiological buffer and had similar mechanical properties to unmodified RBCs. Out of the four approaches, the converted thiol method provided the most controlled chemistry and construct stability. We are now ideally positioned to determine the long-term in vivo efficacy of chemically membrane-engineered RBCs to remove antigens, like TNFα, from serum. STATEMENT OF SIGNIFICANCE: The global and economic success of immunoglobulin-based therapeutics in treating a wide range of diseases has heightened the need to further enhance their efficacy and lifetime while diminishing deleterious side effects. The three most ubiquitous challenges of therapeutic immunoglobulin delivery are their relatively short lifetimes in vivo, the immunologic consequences of soluble antibody-antigen complexes, and the emergence of anti-drug antibodies. We describe the rapid, cell-tolerated chemical engineering of the erythrocyte membrane to display any antibody, our model system being the display of anti-Tumor Necrosis Factor (anti-TNFα), on the surface of long-lived red blood cells (RBCs) while masking the antibody's Fc region. Conversion of RBCs into therapeutic delivery vehicles, we argue, would enhance the circulation life of immunoglobulin-based therapeutics while simultaneously evading deleterious immune response.
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Affiliation(s)
- Weihang Ji
- Disruptive Health Technology Institute, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA
| | - Paige N Smith
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Ave, Pittsburgh, PA 15213, USA
| | - Richard R Koepsel
- Disruptive Health Technology Institute, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA
| | - Jill D Andersen
- Disruptive Health Technology Institute, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA
| | - Stefanie L Baker
- Department of Biomedical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA
| | - Libin Zhang
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA
| | - Sheiliza Carmali
- Disruptive Health Technology Institute, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA
| | - Jacob W Myerson
- Department of Pharmacology and Center for Translational Targeted Therapeutics and Nanomedicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Vladimir Muzykantov
- Department of Pharmacology and Center for Translational Targeted Therapeutics and Nanomedicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Alan J Russell
- Disruptive Health Technology Institute, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA; Department of Biomedical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA; Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Ave, Pittsburgh, PA 15213, USA; Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA.
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Zhang L, Baker SL, Murata H, Harris N, Ji W, Amitai G, Matyjaszewski K, Russell AJ. Tuning Butyrylcholinesterase Inactivation and Reactivation by Polymer-Based Protein Engineering. Adv Sci (Weinh) 2020; 7:1901904. [PMID: 31921563 PMCID: PMC6947490 DOI: 10.1002/advs.201901904] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 09/21/2019] [Indexed: 05/11/2023]
Abstract
Organophosphate nerve agents rapidly inhibit cholinesterases thereby destroying the ability to sustain life. Strong nucleophiles, such as oximes, have been used as therapeutic reactivators of cholinesterase-organophosphate complexes, but suffer from short half-lives and limited efficacy across the broad spectrum of organophosphate nerve agents. Cholinesterases have been used as long-lived therapeutic bioscavengers for unreacted organophosphates with limited success because they react with organophosphate nerve agents with one-to-one stoichiometries. The chemical power of nucleophilic reactivators is coupled to long-lived bioscavengers by designing and synthesizing cholinesterase-polymer-oxime conjugates using atom transfer radical polymerization and azide-alkyne "click" chemistry. Detailed kinetic studies show that butyrylcholinesterase-polymer-oxime activity is dependent on the electrostatic properties of the polymers and the amount of oxime within the conjugate. The covalent coupling of oxime-containing polymers to the surface of butyrylcholinesterase slows the rate of inactivation of paraoxon, a model nerve agent. Furthermore, when the enzyme is covalently inhibited by paraoxon, the covalently attached oxime induced inter- and intramolecular reactivation. Intramolecular reactivation will open the door to the generation of a new class of nerve agent scavengers that couple the speed and selectivity of biology to the ruggedness and simplicity of synthetic chemicals.
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Affiliation(s)
- Libin Zhang
- Center for Polymer‐Based Protein EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
| | - Stefanie L. Baker
- Center for Polymer‐Based Protein EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
- Department of Biomedical EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
| | - Hironobu Murata
- Center for Polymer‐Based Protein EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
| | - Nicholas Harris
- Center for Polymer‐Based Protein EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
- Department of Biotechnology EngineeringORT Braude Academic CollegeKarmielPOB78Israel
| | - Weihang Ji
- Center for Polymer‐Based Protein EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
| | - Gabriel Amitai
- Wohl Drug Discovery InstituteNancy and Stephen Grand Israel National Center for Personalized Medicine (G‐INCPM)Weizmann Institute of ScienceRehovot760001Israel
| | - Krzysztof Matyjaszewski
- Center for Polymer‐Based Protein EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
- Department of ChemistryDepartment of Chemical EngineeringCarnegie Mellon University4400 Fifth AvenuePittsburghPA15213USA
| | - Alan J. Russell
- Center for Polymer‐Based Protein EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
- Department of Biomedical EngineeringCarnegie Mellon University5000 Forbes AvenuePittsburghPA15213USA
- Department of ChemistryDepartment of Chemical EngineeringCarnegie Mellon University4400 Fifth AvenuePittsburghPA15213USA
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21
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Baker SL, Kaupbayeva B, Lathwal S, Das SR, Russell AJ, Matyjaszewski K. Atom Transfer Radical Polymerization for Biorelated Hybrid Materials. Biomacromolecules 2019; 20:4272-4298. [PMID: 31738532 DOI: 10.1021/acs.biomac.9b01271] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Proteins, nucleic acids, lipid vesicles, and carbohydrates are the major classes of biomacromolecules that function to sustain life. Biology also uses post-translation modification to increase the diversity and functionality of these materials, which has inspired attaching various other types of polymers to biomacromolecules. These polymers can be naturally (carbohydrates and biomimetic polymers) or synthetically derived and have unique properties with tunable architectures. Polymers are either grafted-to or grown-from the biomacromolecule's surface, and characteristics including polymer molar mass, grafting density, and degree of branching can be controlled by changing reaction stoichiometries. The resultant conjugated products display a chimerism of properties such as polymer-induced enhancement in stability with maintained bioactivity, and while polymers are most often conjugated to proteins, they are starting to be attached to nucleic acids and lipid membranes (cells) as well. The fundamental studies with protein-polymer conjugates have improved our synthetic approaches, characterization techniques, and understanding of structure-function relationships that will lay the groundwork for creating new conjugated biomacromolecular products which could lead to breakthroughs in genetic and tissue engineering.
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Affiliation(s)
- Stefanie L Baker
- Department of Biomedical Engineering , Carnegie Mellon University , Scott Hall 4N201, 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Center for Polymer-Based Protein Engineering , Carnegie Mellon University , 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Bibifatima Kaupbayeva
- Center for Polymer-Based Protein Engineering , Carnegie Mellon University , 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Department of Biological Sciences , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Sushil Lathwal
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Subha R Das
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Alan J Russell
- Department of Biomedical Engineering , Carnegie Mellon University , Scott Hall 4N201, 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Center for Polymer-Based Protein Engineering , Carnegie Mellon University , 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Department of Biological Sciences , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Department of Chemical Engineering , Carnegie Mellon University , 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering , Carnegie Mellon University , 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States.,Department of Chemical Engineering , Carnegie Mellon University , 5000 Forbes Avenue , Pittsburgh , Pennsylvania 15213 , United States
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22
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Baker SL, Munasinghe A, Kaupbayeva B, Rebecca Kang N, Certiat M, Murata H, Matyjaszewski K, Lin P, Colina CM, Russell AJ. Transforming protein-polymer conjugate purification by tuning protein solubility. Nat Commun 2019; 10:4718. [PMID: 31624254 PMCID: PMC6797786 DOI: 10.1038/s41467-019-12612-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/20/2019] [Indexed: 02/07/2023] Open
Abstract
Almost all commercial proteins are purified using ammonium sulfate precipitation. Protein-polymer conjugates are synthesized from pure starting materials, and the struggle to separate conjugates from polymer, native protein, and from isomers has vexed scientists for decades. We have discovered that covalent polymer attachment has a transformational effect on protein solubility in salt solutions. Here, protein-polymer conjugates with a variety of polymers, grafting densities, and polymer lengths are generated using atom transfer radical polymerization. Charged polymers increase conjugate solubility in ammonium sulfate and completely prevent precipitation even at 100% saturation. Atomistic molecular dynamic simulations show the impact is driven by an anti-polyelectrolyte effect from zwitterionic polymers. Uncharged polymers exhibit polymer length-dependent decreased solubility. The differences in salting-out are then used to simply purify mixtures of conjugates and native proteins into single species. Increasing protein solubility in salt solutions through polymer conjugation could lead to many new applications of protein-polymer conjugates.
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Affiliation(s)
- Stefanie L Baker
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Aravinda Munasinghe
- Department of Chemistry, 354 Leigh Hall, University of Florida, Gainesville, FL, 32611, USA
- George and Josephine Butler Polymer Research Laboratory, University of Florida, Gainesville, FL, 32611, USA
- Center for Macromolecular Science and Engineering, University of Florida, Gainesville, FL, 32611, USA
| | - Bibifatima Kaupbayeva
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Nin Rebecca Kang
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Marie Certiat
- Department of Chemistry, 354 Leigh Hall, University of Florida, Gainesville, FL, 32611, USA
- Université Paul Sabatier, Toulouse, 31062, France
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Ping Lin
- Department of Chemistry, 354 Leigh Hall, University of Florida, Gainesville, FL, 32611, USA
- George and Josephine Butler Polymer Research Laboratory, University of Florida, Gainesville, FL, 32611, USA
- Center for Macromolecular Science and Engineering, University of Florida, Gainesville, FL, 32611, USA
| | - Coray M Colina
- Department of Chemistry, 354 Leigh Hall, University of Florida, Gainesville, FL, 32611, USA
- George and Josephine Butler Polymer Research Laboratory, University of Florida, Gainesville, FL, 32611, USA
- Center for Macromolecular Science and Engineering, University of Florida, Gainesville, FL, 32611, USA
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL, 32611, USA
| | - Alan J Russell
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.
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23
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Murata H, Baker SL, Kaupbayeva B, Lewis DJ, Zhang L, Boye S, Lederer A, Russell AJ. Ligands and characterization for effective bio‐atom‐transfer radical polymerization. Journal of Polymer Science 2019. [DOI: 10.1002/pola.29504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hironobu Murata
- Center for Polymer‐Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
| | - Stefanie L. Baker
- Center for Polymer‐Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
- Department of Biomedical Engineering Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
| | - Bibifatima Kaupbayeva
- Center for Polymer‐Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
- Department of Biological Sciences Carnegie Mellon University, 4400 Fifth Avenue Pittsburgh Pennsylvania 15213
| | - Dylan J. Lewis
- Center for Polymer‐Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
- Department of Chemical Engineering Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
| | - Libin Zhang
- Center for Polymer‐Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
- Department of Chemical Engineering Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
| | - Susanne Boye
- Leibniz‐Institut für Polymerforschung Dresden e.V., Hohe Straße 6 Dresden 01069 Germany
| | - Albena Lederer
- Leibniz‐Institut für Polymerforschung Dresden e.V., Hohe Straße 6 Dresden 01069 Germany
- Technische Universität Dresden 01062 Dresden Germany
| | - Alan J. Russell
- Center for Polymer‐Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
- Department of Biomedical Engineering Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
- Department of Biological Sciences Carnegie Mellon University, 4400 Fifth Avenue Pittsburgh Pennsylvania 15213
- Department of Chemical Engineering Carnegie Mellon University, 5000 Forbes Avenue Pittsburgh Pennsylvania 15213
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24
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Baker SL, Murata H, Kaupbayeva B, Tasbolat A, Matyjaszewski K, Russell AJ. Charge-Preserving Atom Transfer Radical Polymerization Initiator Rescues the Lost Function of Negatively Charged Protein–Polymer Conjugates. Biomacromolecules 2019; 20:2392-2405. [DOI: 10.1021/acs.biomac.9b00379] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
| | | | | | - Adina Tasbolat
- Department of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, Almaty 050040, Republic of Kazakhstan
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25
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Wood AR, Garg R, Justus K, Cohen-Karni T, LeDuc P, Russell AJ. Intact mangrove root electrodes for desalination. RSC Adv 2019; 9:4735-4743. [PMID: 35514616 PMCID: PMC9060697 DOI: 10.1039/c8ra09899a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 01/22/2019] [Indexed: 11/21/2022] Open
Abstract
Through the benefit of billions of years of evolution, biology has developed tremendous strategies on how to co-exist in high salinity and water scarce environments. Biologically-inspired abiotic systems are becoming a central pillar in how we respond to critical grand challenges that accompany exponential population growth, uncontrolled climate change and the harsh reality that 96.5% of the water on the planet is saltwater. One fascinating biologic adaptation to saltwater is the growth of mangrove trees in brackish swamps and along the coasts. Through a process of salt exclusion, the mangrove maintains a near freshwater flow from roots to leaves to survive. One abiotic approach to water desalination is capacitive deionization, which aims to desalinate low-salinity water sources at energy costs below current technologies, such as reverse osmosis and thermal distillation. In this work, we use one-step carbonization of a plant with developed aerenchyma tissue to enable highly-permeable, freestanding flow-through capacitive deionization electrodes. We show that carbonized aerenchyma from red mangrove roots reduces the resistance to water flow through electrodes by 65-fold relative to carbonized common woody biomass. We then demonstrate the practical use of the intact carbonized red mangrove roots as electrodes in a flow-through capacitive deionization system. These findings have implications in a range of fields including water desalination, bioinspired materials, and plant functionality. Biological adaptation in mangrove root enables freestanding carbonized architecture to be used as a highly permeable flow-through capacitive deionization electrode.![]()
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Affiliation(s)
- Adam R Wood
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
| | - Raghav Garg
- Department of Material Science and Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
| | - Kyle Justus
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
| | - Tzahi Cohen-Karni
- Department of Material Science and Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA.,Department of Biomedical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
| | - Philip LeDuc
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA.,Department of Biomedical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA .,Department of Biological Sciences, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA.,Departments Computational Biology, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA
| | - Alan J Russell
- Department of Biomedical Engineering, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA .,Department of Biological Sciences, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA.,Departments of Chemical Engineering & Engineering and Public Policy, Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA.,Institute for Biomedical Materials and Engineering, Northwestern Polytechnical University Xi'an China
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26
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Abstract
The last decade has seen an exponential expansion of interest in conjugating multiple enzymes of cascades in close proximity to each other, with the overarching goal being to accelerate the overall reaction rate. However, some evidence has emerged that there is no effect of proximity channeling on the reaction velocity of the popular GOx-HRP cascade, particularly in the presence of a competing enzyme (catalase). Herein, we rationalize these experimental results quantitatively. We show that, in general, proximity channeling can enhance reaction velocity in the presence of competing enzymes, but in steady state a significant enhancement can only be achieved for diffusion-limited reactions or at high concentrations of competing enzymes. We provide simple equations to estimate the effect of channeling quantitatively and demonstrate that proximity can have a more pronounced effect under crowding conditions in vivo, particularly that crowding can enhance the overall rates of channeled cascade reactions.
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Affiliation(s)
- Andrij Kuzmak
- Department for Theoretical Physics, I. Franko National University of Lviv, Lviv, Ukraine
| | - Sheiliza Carmali
- Department of Chemistry, Aarhus University, 8000, Aarhus C, Denmark.,Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Eric von Lieres
- Forschungszentrum Jülich, IBG-1: Biotechnology, 52425, Jülich, Germany
| | - Alan J Russell
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA.,Department of Chemical Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Svyatoslav Kondrat
- Forschungszentrum Jülich, IBG-1: Biotechnology, 52425, Jülich, Germany. .,Department of Complex Systems, Institute of Physical Chemistry, Warsaw, Poland.
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27
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Kaupbayeva B, Murata H, Lucas A, Matyjaszewski K, Minden JS, Russell AJ. Molecular Sieving on the Surface of a Nano-Armored Protein. Biomacromolecules 2019; 20:1235-1245. [DOI: 10.1021/acs.biomac.8b01651] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Bibifatima Kaupbayeva
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Amber Lucas
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Jonathan S. Minden
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J. Russell
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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28
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Billin AN, Honeycutt SE, McDougal AV, Kerr JP, Chen Z, Freudenberg JM, Rajpal DK, Luo G, Kramer HF, Geske RS, Fang F, Yao B, Clark RV, Lepore J, Cobitz A, Miller R, Nosaka K, Hinken AC, Russell AJ. Correction to: HIF prolyl hydroxylase inhibition protects skeletal muscle from eccentric contraction induced injury. Skelet Muscle 2018; 8:38. [PMID: 30526662 PMCID: PMC6287339 DOI: 10.1186/s13395-018-0185-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Andrew N Billin
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Samuel E Honeycutt
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Alan V McDougal
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Jaclyn P Kerr
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Zhe Chen
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | | | | | - Guizhen Luo
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Henning Fritz Kramer
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Robert S Geske
- Target Sciences, GlaxoSmithKline, King of Prussia, PA, USA
| | - Frank Fang
- Clinical Statistics, GlaxoSmithKline, King of Prussia, PA, USA
| | - Bert Yao
- Metabolic Pathways and Cardiovascular Therapy Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - Richard V Clark
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - John Lepore
- Metabolic Pathways and Cardiovascular Therapy Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - Alex Cobitz
- Metabolic Pathways and Cardiovascular Therapy Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - Ram Miller
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Kazunori Nosaka
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Aaron C Hinken
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Alan J Russell
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA.
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29
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Billin AN, Honeycutt SE, McDougal AV, Kerr JP, Chen Z, Freudenberg JM, Rajpal DK, Luo G, Kramer HF, Geske RS, Fang F, Yao B, Clark RV, Lepore J, Cobitz A, Miller R, Nosaka K, Hinken AC, Russell AJ. HIF prolyl hydroxylase inhibition protects skeletal muscle from eccentric contraction-induced injury. Skelet Muscle 2018; 8:35. [PMID: 30424786 PMCID: PMC6234580 DOI: 10.1186/s13395-018-0179-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 10/14/2018] [Indexed: 12/23/2022] Open
Abstract
Background In muscular dystrophy and old age, skeletal muscle repair is compromised leading to fibrosis and fatty tissue accumulation. Therefore, therapies that protect skeletal muscle or enhance repair would be valuable medical treatments. Hypoxia-inducible factors (HIFs) regulate gene transcription under conditions of low oxygen, and HIF target genes EPO and VEGF have been associated with muscle protection and repair. We tested the importance of HIF activation following skeletal muscle injury, in both a murine model and human volunteers, using prolyl hydroxylase inhibitors that stabilize and activate HIF. Methods Using a mouse eccentric limb injury model, we characterized the protective effects of prolyl hydroxylase inhibitor, GSK1120360A. We then extended these studies to examine the impact of EPO modulation and infiltrating immune cell populations on muscle protection. Finally, we extended this study with an experimental medicine approach using eccentric arm exercise in untrained volunteers to measure the muscle-protective effects of a clinical prolyl hydroxylase inhibitor, daprodustat. Results GSK1120360A dramatically prevented functional deficits and histological damage, while accelerating recovery after eccentric limb injury in mice. Surprisingly, this effect was independent of EPO, but required myeloid HIF1α-mediated iNOS activity. Treatment of healthy human volunteers with high-dose daprodustat reduced accumulation of circulating damage markers following eccentric arm exercise, although we did not observe any diminution of functional deficits with compound treatment. Conclusion The results of these experiments highlight a novel skeletal muscle protective effect of prolyl hydroxylase inhibition via HIF-mediated expression of iNOS in macrophages. Partial recapitulation of these findings in healthy volunteers suggests elements of consistent pharmacology compared to responses in mice although there are clear differences between these two systems. Electronic supplementary material The online version of this article (10.1186/s13395-018-0179-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andrew N Billin
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Samuel E Honeycutt
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Alan V McDougal
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Jaclyn P Kerr
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Zhe Chen
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | | | | | - Guizhen Luo
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Henning Fritz Kramer
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Robert S Geske
- Target Sciences, GlaxoSmithKline, King of Prussia, PA, USA
| | - Frank Fang
- Clinical Statistics, GlaxoSmithKline, King of Prussia, PA, USA
| | - Bert Yao
- Metabolic Pathways and Cardiovascular Therapy Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - Richard V Clark
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - John Lepore
- Metabolic Pathways and Cardiovascular Therapy Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - Alex Cobitz
- Metabolic Pathways and Cardiovascular Therapy Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - Ram Miller
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Kazunori Nosaka
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Aaron C Hinken
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA
| | - Alan J Russell
- Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, King of Prussia, PA, USA.
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30
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Enciso AE, Fu L, Lathwal S, Olszewski M, Wang Z, Das SR, Russell AJ, Matyjaszewski K. Biocatalytic “Oxygen‐Fueled” Atom Transfer Radical Polymerization. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Alan E. Enciso
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Liye Fu
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Sushil Lathwal
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Mateusz Olszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Zhenhua Wang
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Subha R. Das
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Alan J. Russell
- Department of Chemical Engineering Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
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Enciso AE, Fu L, Lathwal S, Olszewski M, Wang Z, Das SR, Russell AJ, Matyjaszewski K. Biocatalytic "Oxygen-Fueled" Atom Transfer Radical Polymerization. Angew Chem Int Ed Engl 2018; 57:16157-16161. [PMID: 30329207 DOI: 10.1002/anie.201809018] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 09/25/2018] [Indexed: 01/06/2023]
Abstract
Atom transfer radical polymerization (ATRP) can be carried out in a flask completely open to air using a biocatalytic system composed of glucose oxidase (GOx) and horseradish peroxidase (HRP) with an active copper catalyst complex. Nanomolar concentrations of the enzymes and ppm amounts of Cu provided excellent control over the polymerization of oligo(ethylene oxide) methyl ether methacrylate (OEOMA500 ), generating polymers with high molecular weight (Mn >70 000) and low dispersities (1.13≤Đ≤1.27) in less than an hour. The continuous oxygen supply was necessary for the generation of radicals and polymer chain growth as demonstrated by temporal control and by inducing hypoxic conditions. In addition, the enzymatic cascade polymerization triggered by oxygen was used for a protein and DNA functionalized with initiators to form protein-b-POEOMA and DNA-b-POEOMA bioconjugates, respectively.
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Affiliation(s)
- Alan E Enciso
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Liye Fu
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Sushil Lathwal
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Mateusz Olszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Zhenhua Wang
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Subha R Das
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Alan J Russell
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
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Patsalos A, Simandi Z, Hays TT, Peloquin M, Hajian M, Restrepo I, Coen PM, Russell AJ, Nagy L. In vivo GDF3 administration abrogates aging related muscle regeneration delay following acute sterile injury. Aging Cell 2018; 17:e12815. [PMID: 30003692 PMCID: PMC6156497 DOI: 10.1111/acel.12815] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 05/17/2018] [Accepted: 06/15/2018] [Indexed: 12/22/2022] Open
Abstract
Tissue regeneration is a highly coordinated process with sequential events including immune cell infiltration, clearance of damaged tissues, and immune‐supported regrowth of the tissue. Aging has a well‐documented negative impact on this process globally; however, whether changes in immune cells per se are contributing to the decline in the body’s ability to regenerate tissues with aging is not clearly understood. Here, we set out to characterize the dynamics of macrophage infiltration and their functional contribution to muscle regeneration by comparing young and aged animals upon acute sterile injury. Injured muscle of old mice showed markedly elevated number of macrophages, with a predominance for Ly6Chigh pro‐inflammatory macrophages and a lower ratio of the Ly6Clow repair macrophages. Of interest, a recently identified repair macrophage‐derived cytokine, growth differentiation factor 3 (GDF3), was markedly downregulated in injured muscle of old relative to young mice. Supplementation of recombinant GDF3 in aged mice ameliorated the inefficient regenerative response. Together, these results uncover a deficiency in the quantity and quality of infiltrating macrophages during aging and suggest that in vivo administration of GDF3 could be an effective therapeutic approach.
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Affiliation(s)
- Andreas Patsalos
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
- Department of Biochemistry and Molecular Biology, Faculty of Medicine; University of Debrecen; Debrecen Hungary
| | - Zoltan Simandi
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
| | - Tristan T. Hays
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
| | - Matthew Peloquin
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
| | - Matine Hajian
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
| | - Isabella Restrepo
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
| | - Paul M. Coen
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
- Florida Hospital; Translational Research Institute for Metabolism and Diabetes; Orlando Florida
| | - Alan J. Russell
- Muscle Metabolism Discovery Performance Unit; GlaxoSmithKline; King of Prussia Pennsylvania
| | - Laszlo Nagy
- Sanford-Burnham-Prebys Medical Discovery Institute at Lake Nona; Orlando Florida
- Department of Biochemistry and Molecular Biology, Faculty of Medicine; University of Debrecen; Debrecen Hungary
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33
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Fu L, Wang Z, Lathwal S, Enciso AE, Simakova A, Das SR, Russell AJ, Matyjaszewski K. Synthesis of Polymer Bioconjugates via Photoinduced Atom Transfer Radical Polymerization under Blue Light Irradiation. ACS Macro Lett 2018; 7:1248-1253. [PMID: 31819831 PMCID: PMC6901285 DOI: 10.1021/acsmacrolett.8b00609] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A rapid blue-light-induced atom transfer radical polymerization (ATRP) was conducted in a biologically friendly environment. Well-controlled polymerization of oligo(ethylene oxide) methyl ether methacrylate (OEOMA) was successfully performed in aqueous media (1X PBS) under irradiation by blue LED strips. With 10.0 mW/cm2 intensity output at 450 nm, >90% conversion was achieved in 2 h in the presence of a system comprising glucose, glucose oxidase, and sodium pyruvate. Poly-(OEOMA) was synthesized with predetermined M n and low dispersities using low ppm of Cu catalysts. Importantly, secondary structures of proteins, as analyzed by circular dichroism (CD), were preserved under blue-light irradiation due to its lower energy output. The aqueous blue-light ATRP technique was applied to biological systems by synthesizing well-defined protein-polymer and DNA-polymer hybrids by the "grafting-from" method.
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Affiliation(s)
- Liye Fu
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Zhenhua Wang
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Sushil Lathwal
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alan E. Enciso
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Antonina Simakova
- Biohybrid Solutions LLC, 320 William Pitt Way, Pittsburgh, Pennsylvania 15238, United States
| | - Subha R. Das
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J. Russell
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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Carmali S, Murata H, Matyjaszewski K, Russell AJ. Tailoring Site Specificity of Bioconjugation Using Step-Wise Atom-Transfer Radical Polymerization on Proteins. Biomacromolecules 2018; 19:4044-4051. [DOI: 10.1021/acs.biomac.8b01064] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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White JP, Billin AN, Campbell ME, Russell AJ, Huffman KM, Kraus WE. The AMPK/p27 Kip1 Axis Regulates Autophagy/Apoptosis Decisions in Aged Skeletal Muscle Stem Cells. Stem Cell Reports 2018; 11:425-439. [PMID: 30033086 PMCID: PMC6093087 DOI: 10.1016/j.stemcr.2018.06.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 01/03/2023] Open
Abstract
Skeletal muscle stem cell (MuSC) function declines with age and contributes to impaired muscle regeneration in older individuals. Acting through AMPK/p27Kip1, we have identified a pathway regulating the balance between autophagy, apoptosis, and senescence in aged MuSCs. While p27Kip1 is implicated in MuSC aging, its precise role and molecular mechanism have not been elucidated. Age-related MuSC dysfunction was associated with reduced autophagy, increased apoptosis, and hypophosphorylation of AMPK and its downstream target p27Kip1. AMPK activation or ectopic expression of a phosphomimetic p27Kip1 mutant was sufficient to suppress in vitro apoptosis, increase proliferation, and improve in vivo transplantation efficiency of aged MuSCs. Moreover, activation of the AMPK/p27Kip1 pathway reduced markers of cell senescence in aged cells, which was, in part, dependent on p27Kip1 phosphorylation. Thus, the AMPK/p27Kip1 pathway likely regulates the autophagy/apoptosis balance in aged MuSCs and may be a potential target for improving muscle regeneration in older individuals.
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Affiliation(s)
- James P White
- Division of Hematology, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA; Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC 27701, USA; Duke Center for the Study of Aging and Human Development, Duke University School of Medicine, Durham, NC 27701, USA.
| | - Andrew N Billin
- Muscle Metabolism Discovery Performance Unit, Metabolic Pathways and Cardiovascular Therapeutic Area, GlaxoSmithKline, King of Prussia, PA 19406, USA
| | - Milton E Campbell
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC 27701, USA
| | - Alan J Russell
- Muscle Metabolism Discovery Performance Unit, Metabolic Pathways and Cardiovascular Therapeutic Area, GlaxoSmithKline, King of Prussia, PA 19406, USA
| | - Kim M Huffman
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC 27701, USA; Duke Center for the Study of Aging and Human Development, Duke University School of Medicine, Durham, NC 27701, USA; Division of Rheumatology, Duke University School of Medicine, Durham, NC 27701, USA
| | - William E Kraus
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC 27701, USA; Duke Center for the Study of Aging and Human Development, Duke University School of Medicine, Durham, NC 27701, USA; Division of Cardiology, Duke University School of Medicine, Durham, NC 27701, USA
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Baker SL, Munasinghe A, Murata H, Lin P, Matyjaszewski K, Colina CM, Russell AJ. Intramolecular Interactions of Conjugated Polymers Mimic Molecular Chaperones to Stabilize Protein–Polymer Conjugates. Biomacromolecules 2018; 19:3798-3813. [DOI: 10.1021/acs.biomac.8b00927] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Stefanie L. Baker
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Aravinda Munasinghe
- Department of Chemistry, 312 Leigh Hall, University of Florida, Gainesville, Florida 32611, United States
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Ping Lin
- Department of Chemistry, 312 Leigh Hall, University of Florida, Gainesville, Florida 32611, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Coray M. Colina
- Department of Chemistry, 312 Leigh Hall, University of Florida, Gainesville, Florida 32611, United States
- Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Alan J. Russell
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Disruptive Health Technology Institute, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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Collibee SE, Bergnes G, Muci A, Browne WF, Garard M, Hinken AC, Russell AJ, Suehiro I, Hartman J, Kawas R, Lu PP, Lee KH, Marquez D, Tomlinson M, Xu D, Kennedy A, Hwee D, Schaletzky J, Leung K, Malik FI, Morgans DJ, Morgan BP. Discovery of Tirasemtiv, the First Direct Fast Skeletal Muscle Troponin Activator. ACS Med Chem Lett 2018; 9:354-358. [PMID: 29670700 PMCID: PMC5900333 DOI: 10.1021/acsmedchemlett.7b00546] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 02/13/2018] [Indexed: 12/11/2022] Open
Abstract
![]()
The
identification and optimization of the first activators of
fast skeletal muscle are reported. Compound 1 was identified
from high-throughput screening (HTS) and subsequently found to improve
muscle function via interaction with the troponin complex. Optimization
of 1 for potency, metabolic stability, and physical properties
led to the discovery of tirasemtiv (25), which has been
extensively characterized in clinical trials for the treatment of
amyotrophic lateral sclerosis.
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Affiliation(s)
- Scott E. Collibee
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Gustave Bergnes
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Alexander Muci
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - William F. Browne
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Marc Garard
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Aaron C. Hinken
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Alan J. Russell
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Ion Suehiro
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - James Hartman
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Raja Kawas
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Pu-Ping Lu
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Kenneth H. Lee
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - David Marquez
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Matthew Tomlinson
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Donghong Xu
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Adam Kennedy
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Darren Hwee
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Julia Schaletzky
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Kwan Leung
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Fady I. Malik
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - David J. Morgans
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
| | - Bradley P. Morgan
- Cytokinetics, Inc., 280 East Grand Avenue, South San Francisco, California 94080, United States
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Murata H, Carmali S, Baker SL, Matyjaszewski K, Russell AJ. Solid-phase synthesis of protein-polymers on reversible immobilization supports. Nat Commun 2018; 9:845. [PMID: 29487296 PMCID: PMC5829226 DOI: 10.1038/s41467-018-03153-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 01/24/2018] [Indexed: 11/28/2022] Open
Abstract
Facile automated biomacromolecule synthesis is at the heart of blending synthetic and biologic worlds. Full access to abiotic/biotic synthetic diversity first occurred when chemistry was developed to grow nucleic acids and peptides from reversibly immobilized precursors. Protein-polymer conjugates, however, have always been synthesized in solution in multi-step, multi-day processes that couple innovative chemistry with challenging purification. Here we report the generation of protein-polymer hybrids synthesized by protein-ATRP on reversible immobilization supports (PARIS). We utilized modified agarose beads to covalently and reversibly couple to proteins in amino-specific reactions. We then modified reversibly immobilized proteins with protein-reactive ATRP initiators and, after ATRP, we released and analyzed the protein polymers. The activity and stability of PARIS-synthesized and solution-synthesized conjugates demonstrated that PARIS was an effective, rapid, and simple method to generate protein-polymer conjugates. Automation of PARIS significantly reduced synthesis/purification timelines, thereby opening a path to changing how to generate protein-polymer conjugates.
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Affiliation(s)
- Hironobu Murata
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Sheiliza Carmali
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Stefanie L Baker
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Alan J Russell
- Center for Polymer-Based Protein Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA.
- Department of Biomedical Engineering, Scott Hall 4N201, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA.
- Disruptive Health Technology Institute, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA.
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA.
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA.
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Dittner AJ, Hodsoll J, Rimes KA, Russell AJ, Chalder T. Cognitive-behavioural therapy for adult attention-deficit hyperactivity disorder: a proof of concept randomised controlled trial. Acta Psychiatr Scand 2018; 137:125-137. [PMID: 29282731 DOI: 10.1111/acps.12836] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/03/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate efficacy, patient acceptability and feasibility of formulation-based cognitive-behavioural therapy (CBT) for adults with attention-deficit hyperactivity disorder (ADHD). NICE guidelines for adult ADHD recommend further research into psychological treatments. METHOD Sixty participants with adult ADHD were randomly allocated to treatment as usual (TAU) vs. TAU plus up to 16 sessions of individual formulation-based CBT for ADHD. RESULTS Adding formulation-based CBT to TAU for ADHD significantly improved ADHD symptoms on the Barkley Current Symptoms Scale and scores on the Work and Social Adjustment Scale. Adjusted effect sizes (ES) were 1.31 and 0.82 respectively. There were also significant improvements on secondary outcomes including independently evaluated clinical global improvement, self-rated anxiety, depression, global distress and patient satisfaction (adjusted effect sizes 0.52-1.01). CONCLUSIONS This is the first randomised controlled trial to provide preliminary evidence of efficacy and acceptability of individual formulation-based CBT for ADHD when added to TAU over TAU alone. This approach now needs to be tested in a larger multicentred randomised controlled trial.
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Affiliation(s)
- A J Dittner
- Psychological Medicine and Integrated Care Clinical Academic Group, Chronic Fatigue Research and Treatment Unit (formerly Behavioural and Developmental Psychiatry Clinical Academic Group, Maudsley Adult ADHD Service), South London and Maudsley NHS Foundation Trust, King's College London, King's Health Partners, London, UK
| | - J Hodsoll
- Department of Biostatistics, Institute of Psychiatry, Psychology and Neuroscience, King's College London, King's Health Partners, London, UK
| | - K A Rimes
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, King's Health Partners, London, UK
| | - A J Russell
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,Department of Psychology, University of Bath, Bath, UK
| | - T Chalder
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, King's Health Partners, London, UK
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Enciso AE, Fu L, Russell AJ, Matyjaszewski K. A Breathing Atom-Transfer Radical Polymerization: Fully Oxygen-Tolerant Polymerization Inspired by Aerobic Respiration of Cells. Angew Chem Int Ed Engl 2018; 57:933-936. [PMID: 29240973 DOI: 10.1002/anie.201711105] [Citation(s) in RCA: 143] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 12/08/2017] [Indexed: 01/11/2023]
Abstract
The first well-controlled aqueous atom-transfer radical polymerization (ATRP) conducted in the open air is reported. This air-tolerant ATRP was enabled by the continuous conversion of oxygen to carbon dioxide catalyzed by glucose oxidase (GOx), in the presence of glucose and sodium pyruvate as sequential sacrificial substrates. Controlled polymerization using initiators for continuous activator regeneration (ICAR) ATRP of oligo(ethylene oxide) methyl ether methacrylate (OEOMA, Mn =500) yielded polymers with low dispersity (1.09≤Đ≤1.29) and molecular weights (MWs) close to theoretical values in the presence of pyruvate. Without added pyruvates, lower MWs were observed due to generation of new chains by H2 O2 formed by reaction of O2 with GOx. Successful chain extension of POEOMA500 macroinitiator with OEOMA300 (Đ≤1.3) and Bovine Serum Albumin bioconjugates (Đ≤1.22) confirmed a well-controlled polymerization. The reactions in the open air in larger scale (25 mL) were also successful.
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Affiliation(s)
- Alan E Enciso
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Liye Fu
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Alan J Russell
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
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41
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Enciso AE, Fu L, Russell AJ, Matyjaszewski K. A Breathing Atom‐Transfer Radical Polymerization: Fully Oxygen‐Tolerant Polymerization Inspired by Aerobic Respiration of Cells. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711105] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alan E. Enciso
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Liye Fu
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Alan J. Russell
- Department of Chemical Engineering Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
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42
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Cooper K, Loades ME, Russell AJ. Adapting Psychological Therapies for Autism - Therapist Experience, Skills and Confidence. Res Autism Spectr Disord 2018; 45:43-50. [PMID: 30245739 PMCID: PMC6150418 DOI: 10.1016/j.rasd.2017.11.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
BACKGROUND Psychological interventions informed by cognitive behavioural theory have proven efficacy in treating mild-moderate anxiety and depression. They have been successfully adapted for autistic children and adults who experience disproportionately high rates of co-occurring emotional problems. There has been little research into the perspectives and experience of psychological therapists adapting cognitive behavioural therapy (CBT) as part of routine clinical practice. We surveyed therapist skills, experience and confidence in working psychologically with autistic people, in order to highlight gaps and needs, as well as strengths in terms of therapist skills when working with this group. METHOD Fifty therapists attending a training event completed a survey about their experience of adapting CBT for autistic clients, alongside a measure of therapist confidence. RESULTS Almost all therapists reported making adaptations to CBT practice when working with autistic clients. Key challenges identified were rigidity in thinking and pacing sessions appropriately. Therapists were relatively confident about core engagement and assessment skills but reported less confidence in using their knowledge to help this group. Therapist confidence was not associated with years of practice or number of adaptations made, but was positively associated with level of therapy training received. CONCLUSIONS This study highlights a need for training and ongoing supervision to increase therapist confidence in and ability to make appropriate adaptations to CBT treatment protocols for autistic people.
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Affiliation(s)
- K Cooper
- Department of Psychology, University of Bath, Claverton Down, Bath BA2 7AY
| | - M E Loades
- Department of Psychology, University of Bath, Claverton Down, Bath BA2 7AY
- Bristol Medical School, Oakfield House, University of Bristol, Bristol BS8 2BN
| | - A J Russell
- Department of Psychology, University of Bath, Claverton Down, Bath BA2 7AY
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Wurtzel CNW, Gumucio JP, Grekin JA, Khouri RK, Davis CS, Russell AJ, Bedi A, Mendias CL. Pharmacological inhibition of myostatin protects against skeletal muscle atrophy and weakness after anterior cruciate ligament tear. J Orthop Res 2017; 35:2499-2505. [PMID: 28176368 PMCID: PMC5548641 DOI: 10.1002/jor.23537] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 02/02/2017] [Indexed: 02/04/2023]
Abstract
Anterior cruciate ligament (ACL) tears are among the most frequent knee injuries in sports medicine, with tear rates in the US up to 250,000 per year. Many patients who suffer from ACL tears have persistent atrophy and weakness even after considerable rehabilitation. Myostatin is a cytokine that directly induces muscle atrophy, and previous studies rodent models and patients have demonstrated an upregulation of myostatin after ACL tear. Using a preclinical rat model, our objective was to determine if the use of a bioneutralizing antibody against myostatin could prevent muscle atrophy and weakness after ACL tear. Rats underwent a surgically induced ACL tear and were treated with either a bioneutralizing antibody against myostatin (10B3, GlaxoSmithKline) or a sham antibody (E1-82.15, GlaxoSmithKline). Muscles were harvested at either 7 or 21 days after induction of a tear to measure changes in contractile function, fiber size, and genes involved in muscle atrophy and hypertrophy. These time points were selected to evaluate early and later changes in muscle structure and function. Compared to the sham antibody group, 7 days after ACL tear, myostatin inhibition reduced the expression of proteolytic genes and induced the expression of hypertrophy genes. These early changes in gene expression lead to a 22% increase in muscle fiber cross-sectional area and a 10% improvement in maximum isometric force production that were observed 21 days after ACL tear. Overall, myostatin inhibition lead to several favorable, although modest, changes in molecular biomarkers of muscle regeneration and reduced muscle atrophy and weakness following ACL tear. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2499-2505, 2017.
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Affiliation(s)
- Caroline N W Wurtzel
- Department of Orthopaedic Surgery, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109
| | - Jonathan P Gumucio
- Department of Orthopaedic Surgery, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109,Department of Molecular & Integrative Physiology, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109
| | - Jeremy A Grekin
- Department of Orthopaedic Surgery, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109
| | - Roger K Khouri
- Department of Orthopaedic Surgery, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109
| | - Carol S Davis
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109
| | - Alan J Russell
- Muscle Metabolism DPU, GlaxoSmithKline Pharmaceuticals, 2301 Renaissance Blvd, King of Prussia, PA, 19406
| | - Asheesh Bedi
- Department of Orthopaedic Surgery, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109
| | - Christopher L Mendias
- Department of Orthopaedic Surgery, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109,Department of Molecular & Integrative Physiology, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, MI, 48109,To whom correspondence should be addressed: Christopher L Mendias, PhD, ATC, Department of Orthopaedic Surgery, University of Michigan Medical School, 109 Zina Pitcher Place, BSRB 2017, Ann Arbor, MI 48109-2200, 734-764-3250,
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Campbell AS, Islam MF, Russell AJ. Intramolecular Electron Transfer through Poly-Ferrocenyl Glucose Oxidase Conjugates to Carbon Electrodes: 1. Sensor Sensitivity, Selectivity and Longevity. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.150] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Carmali S, Murata H, Amemiya E, Matyjaszewski K, Russell AJ. Tertiary Structure-Based Prediction of How ATRP Initiators React with Proteins. ACS Biomater Sci Eng 2017; 3:2086-2097. [DOI: 10.1021/acsbiomaterials.7b00281] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sheiliza Carmali
- Center
for Polymer-Based Protein Engineering and ‡Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Hironobu Murata
- Center
for Polymer-Based Protein Engineering and ‡Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Erika Amemiya
- Center
for Polymer-Based Protein Engineering and ‡Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Center
for Polymer-Based Protein Engineering and ‡Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J. Russell
- Center
for Polymer-Based Protein Engineering and ‡Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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Campbell AS, Islam MF, Russell AJ. Intramolecular Electron Transfer through Poly-Ferrocenyl Glucose Oxidase Conjugates to Carbon Electrodes: 2. Mechanistic Understanding of Long-Term Stability. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.06.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Ji W, Koepsel RR, Murata H, Zadan S, Campbell AS, Russell AJ. Bactericidal Specificity and Resistance Profile of Poly(Quaternary Ammonium) Polymers and Protein–Poly(Quaternary Ammonium) Conjugates. Biomacromolecules 2017; 18:2583-2593. [DOI: 10.1021/acs.biomac.7b00705] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weihang Ji
- Center
for Polymer-Based Protein Engineering, ‡Department of Chemical Engineering, §Department of Biomedical
Engineering, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Richard R. Koepsel
- Center
for Polymer-Based Protein Engineering, ‡Department of Chemical Engineering, §Department of Biomedical
Engineering, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Hironobu Murata
- Center
for Polymer-Based Protein Engineering, ‡Department of Chemical Engineering, §Department of Biomedical
Engineering, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Sawyer Zadan
- Center
for Polymer-Based Protein Engineering, ‡Department of Chemical Engineering, §Department of Biomedical
Engineering, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Alan S. Campbell
- Center
for Polymer-Based Protein Engineering, ‡Department of Chemical Engineering, §Department of Biomedical
Engineering, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J. Russell
- Center
for Polymer-Based Protein Engineering, ‡Department of Chemical Engineering, §Department of Biomedical
Engineering, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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Abstract
Researchers face many challenges, both scientific and societal, in the field of tissue engineering. Herein we discuss the challenges in material design, selection of therapeutic cell source, the in vitro culturing of cells and materials, and finally the integration of the cultured construct into the body. We focus special attention on a new approach to the design of a biomaterial that would bridge synthetic and biologic materials seamlessly. The scaffolds we have developed serve as a transitional material between biotic and abiotic systems.
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Affiliation(s)
- Sara L Wargo
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
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Carmali S, Murata H, Cummings C, Matyjaszewski K, Russell AJ. Polymer-Based Protein Engineering: Synthesis and Characterization of Armored, High Graft Density Polymer-Protein Conjugates. Methods Enzymol 2017; 590:347-380. [PMID: 28411645 DOI: 10.1016/bs.mie.2016.12.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Atom transfer radical polymerization (ATRP) from the surface of a protein can generate remarkably dense polymer shells that serve as armor and rationally tune protein function. Using straightforward chemistry, it is possible to covalently couple or display multiple small molecule initiators onto a protein surface. The chemistry is fine-tuned to be sequence specific (if one desires a single targeted site) at controlled density. Once the initiator is anchored on the protein surface, ATRP is used to grow polymers on protein surface, in situ. The technique is so powerful that a single-protein polymer conjugate molecule can contain more than 90% polymer coating by weight. If desired, stimuli-responsive polymers can be "grown" from the initiated sites to prepare enzyme conjugates that respond to external triggers such as temperature or pH, while still maintaining enzyme activity and stability. Herein, we focus mainly on the synthesis of chymotrypsin-polymer conjugates. Control of the number of covalently coupled initiator sites by changing the stoichiometric ratio between enzyme and the initiator during the synthesis of protein-initiator complexes allowed fine-tuning of the grafting density. For example, very high grafting density chymotrypsin conjugates were prepared from protein-initiator complexes to grow the temperature-responsive polymers, poly(N-isopropylacrylamide), and poly[N,N'-dimethyl(methacryloyloxyethyl) ammonium propane sulfonate]. Controlled growth of polymers from protein surfaces enables one to predictably manipulate enzyme kinetics and stability without the need for molecular biology-dependent mutagenesis.
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Affiliation(s)
- Sheiliza Carmali
- Center for Polymer-Based Protein Engineering, ICES, Carnegie Mellon University, Pittsburgh, PA, United States; Carnegie Mellon University, Pittsburgh, PA, United States
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, ICES, Carnegie Mellon University, Pittsburgh, PA, United States; Carnegie Mellon University, Pittsburgh, PA, United States
| | - Chad Cummings
- Center for Polymer-Based Protein Engineering, ICES, Carnegie Mellon University, Pittsburgh, PA, United States; Carnegie Mellon University, Pittsburgh, PA, United States
| | - Krzysztof Matyjaszewski
- Center for Polymer-Based Protein Engineering, ICES, Carnegie Mellon University, Pittsburgh, PA, United States; Carnegie Mellon University, Pittsburgh, PA, United States
| | - Alan J Russell
- Center for Polymer-Based Protein Engineering, ICES, Carnegie Mellon University, Pittsburgh, PA, United States; Carnegie Mellon University, Pittsburgh, PA, United States.
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Cummings CS, Campbell AS, Baker SL, Carmali S, Murata H, Russell AJ. Design of Stomach Acid-Stable and Mucin-Binding Enzyme Polymer Conjugates. Biomacromolecules 2017; 18:576-586. [DOI: 10.1021/acs.biomac.6b01723] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Chad S. Cummings
- Center for Polymer-Based Protein Engineering, ‡Department of Biomedical Engineering, §Disruptive Health Technology
Institute, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Alan S. Campbell
- Center for Polymer-Based Protein Engineering, ‡Department of Biomedical Engineering, §Disruptive Health Technology
Institute, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Stefanie L. Baker
- Center for Polymer-Based Protein Engineering, ‡Department of Biomedical Engineering, §Disruptive Health Technology
Institute, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Sheiliza Carmali
- Center for Polymer-Based Protein Engineering, ‡Department of Biomedical Engineering, §Disruptive Health Technology
Institute, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Hironobu Murata
- Center for Polymer-Based Protein Engineering, ‡Department of Biomedical Engineering, §Disruptive Health Technology
Institute, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Alan J. Russell
- Center for Polymer-Based Protein Engineering, ‡Department of Biomedical Engineering, §Disruptive Health Technology
Institute, and ∥Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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