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Anil Sushma A, Zhao B, Tsvetkova IB, Pérez-Segura C, Hadden-Perilla JA, Reilly JP, Dragnea B. Subset of Fluorophores Is Responsible for Radiation Brightening in Viromimetic Particles. J Phys Chem B 2021; 125:10494-10505. [PMID: 34507491 DOI: 10.1021/acs.jpcb.1c06395] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In certain conditions, dye-conjugated icosahedral virus shells exhibit suppression of concentration quenching. The recently observed radiation brightening at high fluorophore densities has been attributed to coherent emission, i.e., to a cooperative process occurring within a subset of the virus-supported fluorophores. Until now, the distribution of fluorophores among potential conjugation sites and the nature of the active subset remained unknown. With the help of mass spectrometry and molecular dynamics simulations, we found which conjugation sites in the brome mosaic virus capsid are accessible to fluorophores. Reactive external surface lysines but also those at the lumenal interface where the coat protein N-termini are located showed virtually unrestricted access to dyes. The third type of labeled lysines was situated at the intercapsomeric interfaces. Through limited proteolysis of flexible N-termini, it was determined that dyes bound to them are unlikely to be involved in the radiation brightening effect. At the same time, specific labeling of genetically inserted cysteines on the exterior capsid surface alone did not lead to radiation brightening. The results suggest that lysines situated within the more rigid structural part of the coat protein provide the chemical environments conducive to radiation brightening, and we discuss some of the characteristics of these environments.
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Affiliation(s)
- Arathi Anil Sushma
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Bingqing Zhao
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Irina B Tsvetkova
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Carolina Pérez-Segura
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Jodi A Hadden-Perilla
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - James P Reilly
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Bogdan Dragnea
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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2
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Chen M, Huang L, Shen X, Li M, Luo Z, Cai K, Hu Y. Construction of multilayered molecular reservoirs on a titanium alloy implant for combinational drug delivery to promote osseointegration in osteoporotic conditions. Acta Biomater 2020; 105:304-318. [PMID: 31982586 DOI: 10.1016/j.actbio.2020.01.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 12/09/2019] [Accepted: 01/21/2020] [Indexed: 01/31/2023]
Abstract
In this study, β-cyclodextrin (β-CD) molecules are used as molecular reservoirs and grafted onto chitosan molecules for calcitriol (VD3) loading, which is a hormonally active metabolite of vitamin D. The resultant molecular complex is co-assembled with an antiosteoporosis drug calcitonin (CT) to form bio-functional multilayer structure on Ti6Al7Nb substrate via layer-by-layer self-assembly, which is capable of releasing VD3 and calcitonin in a sustained manner to modulate osteoblasts, osteoclasts, and macrophages at the bone-implant interface. In vitro results show that the released VD3 and CT individually upregulated the expression of calcium-binding protein (including Calbindin D9k and Calbindin D28k) and BMP2 in osteoblasts in peri-implant regions to stimulate their Ca deposition and differentiation. RAW264.7 cells (a murine macrophage) on the biofunctional implant displayed improved M2 phenotypical differentiation and expression of BMP2 and VEGF genes, but M1 phenotypical differentiation potential and MCF and TRAP gene expression levels are evidently lower. Results from in vivo micro-CT and histological analysis also demonstrate that VD3/CT co-loaded implant can dramatically enhance the bone remodeling under osteoporotic conditions with significantly enhanced interfacial shear strength and improved osseointegration as compared to other groups. The insights in this study offer new avenues for the rational functionalization of titanium implants to effectively repair osteoporotic fractures. STATEMENT OF SIGNIFICANCE: A promising strategy to enhance the recovery rate of osteoporotic fractures is to immobilize antiosteoporotic drugs onto the surface of titanium-based implants. In this study, we grafted beta-cyclodextrin (β-CD) onto chitosan (Chi) molecules to load VD3, which was co-assembled with calcitonin (CT) onto Ti6Al7Nb implants by the layer-by-layer assembly technique. The obtained functional titanium alloy implant (Ti6Al7Nb/LBL/Chi-CD@VD3/ CT) could stably release VD3 and calcitonin agents in a sustained manner. RAW264.7 cells grown on Ti6Al7Nb/LBL/Chi-CD@VD3/CT showed superior M2 phenotypical differentiation efficiency, but lower MCF/TRAP gene expression levels. In vitro and in vivo results showed that the released VD3 and CT individually upregulated the expression of calcium binding proteins and BMP2 in osteoblasts, promoting new bone formation in the peri-implant region.
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Affiliation(s)
- Maohua Chen
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China
| | - Ling Huang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China
| | - Xinkun Shen
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China
| | - Menghuan Li
- School of Life Science, Chongqing University, Chongqing 400044, China
| | - Zhong Luo
- School of Life Science, Chongqing University, Chongqing 400044, China
| | - Kaiyong Cai
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China
| | - Yan Hu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China.
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Labie H, Perro A, Lapeyre V, Goudeau B, Catargi B, Auzély R, Ravaine V. Sealing hyaluronic acid microgels with oppositely-charged polypeptides: A simple strategy for packaging hydrophilic drugs with on-demand release. J Colloid Interface Sci 2018; 535:16-27. [PMID: 30273723 DOI: 10.1016/j.jcis.2018.09.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/14/2018] [Accepted: 09/14/2018] [Indexed: 12/16/2022]
Abstract
A simple route to deliver on demand hydrosoluble molecules such as peptides, packaged in biocompatible and biodegradable microgels, is presented. Hyaluronic acid hydrogel particles with a controlled structure are prepared using a microfluidic approach. Their porosity and their rigidity can be tuned by changing the crosslinking density. These negatively-charged polyelectrolytes interact strongly with positively-charged linear peptides such as poly-l-lysine (PLL). Their interactions induce microgel deswelling and inhibit microgel enzymatic degradability by hyaluronidase. While small PLL penetrate the whole volume of the microgel, PLL larger than the mesh size of the network remain confined at its periphery. They make a complexed layer with reduced pore size, which insulates the microgel inner core from the outer medium. Consequently, enzymatic degradation of the matrix is fully inhibited and non-affinity hydrophilic species can be trapped in the core. Indeed, negatively-charged or small neutral peptides, without interactions with the network, usually diffuse freely across the network. By simple addition of large PLL, they are packaged in the core and can be released on demand, upon introduction of an enzyme that degrades selectively the capping agent. Single polyelectrolyte layer appears as a simple generic method to coat hydrogel-based materials of various scales for encapsulation and controlled delivery of hydrosoluble molecules.
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Affiliation(s)
- Hélène Labie
- Univ. Bordeaux, ISM, CNRS UMR 5255, Bordeaux INP, Site ENSCBP, 16 Avenue Pey Berland, 33607 Pessac Cedex, France
| | - Adeline Perro
- Univ. Bordeaux, ISM, CNRS UMR 5255, Bordeaux INP, Site ENSCBP, 16 Avenue Pey Berland, 33607 Pessac Cedex, France
| | - Véronique Lapeyre
- Univ. Bordeaux, ISM, CNRS UMR 5255, Bordeaux INP, Site ENSCBP, 16 Avenue Pey Berland, 33607 Pessac Cedex, France
| | - Bertrand Goudeau
- Univ. Bordeaux, ISM, CNRS UMR 5255, Bordeaux INP, Site ENSCBP, 16 Avenue Pey Berland, 33607 Pessac Cedex, France
| | | | - Rachel Auzély
- Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), Affiliated with Université Joseph Fourier, 601 rue de la Chimie, 38041 Grenoble, France
| | - Valérie Ravaine
- Univ. Bordeaux, ISM, CNRS UMR 5255, Bordeaux INP, Site ENSCBP, 16 Avenue Pey Berland, 33607 Pessac Cedex, France.
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4
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Yang L, Chumsae C, Kaplan JB, Moulton KR, Wang D, Lee DH, Zhou ZS. Detection of Alkynes via Click Chemistry with a Brominated Coumarin Azide by Simultaneous Fluorescence and Isotopic Signatures in Mass Spectrometry. Bioconjug Chem 2017; 28:2302-2309. [DOI: 10.1021/acs.bioconjchem.7b00354] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Lihua Yang
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, Massachusetts 01605, United States
- Barnett
Institute of Chemical and Biological Analysis, Department of Chemistry
and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Chris Chumsae
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, Massachusetts 01605, United States
| | - Jenifer B. Kaplan
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, Massachusetts 01605, United States
| | - Kevin Ryan Moulton
- Barnett
Institute of Chemical and Biological Analysis, Department of Chemistry
and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Dongdong Wang
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, Massachusetts 01605, United States
| | - David H. Lee
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, Massachusetts 01605, United States
| | - Zhaohui Sunny Zhou
- Barnett
Institute of Chemical and Biological Analysis, Department of Chemistry
and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
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5
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Höper T, Mussotter F, Haase A, Luch A, Tralau T. Application of proteomics in the elucidation of chemical-mediated allergic contact dermatitis. Toxicol Res (Camb) 2017; 6:595-610. [PMID: 30090528 PMCID: PMC6062186 DOI: 10.1039/c7tx00058h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/07/2017] [Indexed: 12/23/2022] Open
Abstract
Allergic contact dermatitis (ACD) is a widespread hypersensitivity reaction of the skin. The cellular mechanisms underlying its development are complex and involve close interaction of different cell types of the immune system. It is this very complexity which has long prevented straightforward replacement of the corresponding regulatory in vivo tests. Recent efforts have already resulted in the development of several in vitro testing alternatives that address key steps of ACD. Yet identification of suitable biomarkers is still a subject of intense research. Search strategies for the latter encompass transcriptomics, proteomics as well as metabolomics approaches. The scope of this review shall be the application and use of proteomics in the context of ACD. This includes highlighting relevant aspects of the molecular and cellular mechanisms underlying ACD, the exploitation of these mechanisms for testing and biomarkers (e.g., in the context of the OECD's adverse outcome pathway initiative) as well as an outlook on emerging proteome targets, for example during the allergen-induced activation of dendritic cells (DCs).
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Affiliation(s)
- Tessa Höper
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany .
| | - Franz Mussotter
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany .
| | - Andrea Haase
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany .
| | - Andreas Luch
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany .
| | - Tewes Tralau
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany .
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6
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Guedes S, Neves B, Vitorino R, Domingues R, Cruz MT, Domingues P. Contact dermatitis: in pursuit of sensitizer's molecular targets through proteomics. Arch Toxicol 2016; 91:811-825. [PMID: 27129696 DOI: 10.1007/s00204-016-1714-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 04/14/2016] [Indexed: 10/21/2022]
Abstract
Protein haptenation, i.e., the modification of proteins by small reactive chemicals, is the key step in the sensitization phase of allergic contact dermatitis (ACD). Despite the research effort in past decades, the identification of immunogenic hapten-protein complexes that trigger a relevant pathogenic immune response in ACD, as well as the haptenation reaction molecular site, and the elements of a potentially conditioning environment during each of these stages, remain poorly understood. These questions led us to employ a proteomics-based approach to identify modified proteins in the dendritic-like cell line THP-1 sensitized with fluorescein isothiocyanate (FITC), through a combination of 2D-gel electrophoresis, nano-LC and mass spectrometry. A specific set of 39 targeted proteins was identified and comprised proteins from various cellular locations and biological functions. One of FITC targets was identified as MLK, a member of the mixed-lineage kinase family known to act as a mitogen-activated protein kinase kinase kinase and to control the activity of specific mitogen-activated protein kinase pathways, namely p38 and JNK pathways. Haptenated in the vicinity of its active site, our results point to MLK being a relevant target due to a consistent non-activation at early time points of these pathways upon FITC sensitization in THP-1 cells. Moreover, FITC pre-treatment significantly decrease phospho-p38 and phospho-JNK levels induced upon exposure to a classical activator such as lipopolysaccharide or to the sensitizer 2,4-dinitrofluorobenzene. Overall, our data point to specific amino acid residues haptenation within critical proteins as the key step in the subsequent signaling pathways modulation responsible for DC activation and maturation events.
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Affiliation(s)
- Sofia Guedes
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal.
| | - Bruno Neves
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal.,Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Rui Vitorino
- Department of Medical Sciences, Institute for Biomedicine - iBiMED, University of Aveiro, Aveiro, Portugal.,Department of Physiology and Cardiothoracic Surgery, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Rosário Domingues
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal
| | - Maria Teresa Cruz
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Pedro Domingues
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal.
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7
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Büyüktimkin B, Stewart J, Tabanor K, Kiptoo P, Siahaan TJ. Protein and Peptide Conjugates for Targeting Therapeutics and Diagnostics to Specific Cells. Drug Deliv 2016. [DOI: 10.1002/9781118833322.ch20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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8
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Huang L, Luo Z, Hu Y, Shen X, Li M, Li L, Zhang Y, Yang W, Liu P, Cai K. Enhancement of local bone remodeling in osteoporotic rabbits by biomimic multilayered structures on Ti6Al4V implants. J Biomed Mater Res A 2016; 104:1437-51. [PMID: 26822259 DOI: 10.1002/jbm.a.35667] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/30/2015] [Accepted: 01/25/2016] [Indexed: 02/05/2023]
Affiliation(s)
- Ling Huang
- Key Laboratory of Biorheological Science and Technology; Ministry of Education, College of Bioengineering, Chongqing University; Chongqing 400044 People's Republic of China
| | - Zhong Luo
- School of Life Science; Chongqing University; Chongqing 400044 People's Republic of China
| | - Yan Hu
- Key Laboratory of Biorheological Science and Technology; Ministry of Education, College of Bioengineering, Chongqing University; Chongqing 400044 People's Republic of China
| | - Xinkun Shen
- Key Laboratory of Biorheological Science and Technology; Ministry of Education, College of Bioengineering, Chongqing University; Chongqing 400044 People's Republic of China
| | - Menghuan Li
- School of Life Science; Chongqing University; Chongqing 400044 People's Republic of China
| | - Liqi Li
- Department of Orthopedics; Xinqiao Hospital, Third Military Medical University; Xinqiao Street Chongqing 400037 People's Republic of China
| | - Yuan Zhang
- Department of Orthopedics; Xinqiao Hospital, Third Military Medical University; Xinqiao Street Chongqing 400037 People's Republic of China
| | - Weihu Yang
- Key Laboratory of Biorheological Science and Technology; Ministry of Education, College of Bioengineering, Chongqing University; Chongqing 400044 People's Republic of China
| | - Peng Liu
- Key Laboratory of Biorheological Science and Technology; Ministry of Education, College of Bioengineering, Chongqing University; Chongqing 400044 People's Republic of China
| | - Kaiyong Cai
- Key Laboratory of Biorheological Science and Technology; Ministry of Education, College of Bioengineering, Chongqing University; Chongqing 400044 People's Republic of China
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9
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Shen X, Zhang Y, Hu Y, Luo Z, Ma P, Li L, Mu C, Huang L, Pei Y, Cai K. Regulation of local bone remodeling mediated by hybrid multilayer coating embedded with hyaluronan-alendronate/BMP-2 nanoparticles on Ti6Al7Nb implants. J Mater Chem B 2016; 4:7101-7111. [PMID: 32263647 DOI: 10.1039/c6tb01779g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Hyaluronate-alendronate/BMP-2 nanoparticles were inserted into Gel/Chi multilayers on Ti6Al7Nb for enhancing BMP-2 stability and promoting local osteogenesis under osteoporosis.
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10
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Choi J, Vaidyanathan G, Koumarianou E, McDougald D, Pruszynski M, Osada T, Lahoutte T, Lyerly HK, Zalutsky MR. N-Succinimidyl guanidinomethyl iodobenzoate protein radiohalogenation agents: influence of isomeric substitution on radiolabeling and target cell residualization. Nucl Med Biol 2014; 41:802-12. [PMID: 25156548 DOI: 10.1016/j.nucmedbio.2014.07.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 06/30/2014] [Accepted: 07/14/2014] [Indexed: 01/18/2023]
Abstract
INTRODUCTION N-succinimidyl 4-guanidinomethyl-3-[(*)I]iodobenzoate ([(*)I]SGMIB) has shown promise for the radioiodination of monoclonal antibodies (mAbs) and other proteins that undergo extensive internalization after receptor binding, enhancing tumor targeting compared to direct electrophilic radioiodination. However, radiochemical yields for [(131)I]SGMIB synthesis are low, which we hypothesize is due to steric hindrance from the Boc-protected guanidinomethyl group ortho to the tin moiety. To overcome this, we developed the isomeric compound, N-succinimidyl 3-guanidinomethyl-5-[(131)I]iodobenzoate (iso-[(131)I]SGMIB) wherein this bulky group was moved from ortho to meta position. METHODS Boc2-iso-SGMIB standard and its tin precursor, N-succinimidyl 3-((1,2-bis(tert-butoxycarbonyl)guanidino)methyl)-5-(trimethylstannyl)benzoate (Boc2-iso-SGMTB), were synthesized using two disparate routes, and iso-[*I]SGMIB synthesized from the tin precursor. Two HER2-targeted vectors - trastuzumab (Tras) and a nanobody 5F7 (Nb) - were labeled using iso-[(*)I]SGMIB and [(*)I]SGMIB. Paired-label internalization assays in vitro with both proteins, and biodistribution in vivo with trastuzumab, labeled using the two isomeric prosthetic agents were performed. RESULTS When the reactions were performed under identical conditions, radioiodination yields for the synthesis of Boc2-iso-[(131)I]SGMIB were significantly higher than those for Boc2-[(131)I]SGMIB (70.7±2.0% vs 56.5±5.5%). With both Nb and trastuzumab, conjugation efficiency also was higher with iso-[(131)I]SGMIB than with [(131)I]SGMIB (Nb, 33.1±7.1% vs 28.9±13.0%; Tras, 45.1±4.5% vs 34.8±10.3%); however, the differences were not statistically significant. Internalization assays performed on BT474 cells with 5F7 Nb indicated similar residualizing capacity over 6h; however, at 24h, radioactivity retained intracellularly for iso-[(131)I]SGMIB-Nb was lower than for [(125)I]SGMIB-Nb (46.4±1.3% vs 56.5±2.5%); similar results were obtained using Tras. Likewise, a paired-label biodistribution of Tras labeled using iso-[(125)I]SGMIB and [(131)I]SGMIB indicated an up to 22% tumor uptake advantage at later time points for [(131)I]SGMIB-Tras. CONCLUSION Given the higher labeling efficiency obtained with iso-SGMIB, this residualizing agent might be of value for use with shorter half-life radiohalogens.
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Affiliation(s)
- Jaeyeon Choi
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | | | | | - Darryl McDougald
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | - Marek Pruszynski
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | - Takuya Osada
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | | | - H Kim Lyerly
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Michael R Zalutsky
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
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Zhang H, Ma X, Guo J, Nguyen KT, Zhang Q, Wang XJ, Yan H, Zhu L, Zhao Y. Thermo-responsive fluorescent vesicles assembled by fluorescein-functionalized pillar[5]arene. RSC Adv 2013. [DOI: 10.1039/c2ra22123c] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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12
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Dai L, Preston R, Bacica M, Kinhikar A, Bolaños B, Murphy RE. Development of a Potential High-Throughput Workflow to Characterize Sites of Bioconjugation by Immuno-Affinity Capture Coupled to MALDI-TOF Mass Spectrometry. Bioconjug Chem 2012. [DOI: 10.1021/bc300413c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lan Dai
- Department of Analytical Sciences, CovX, Pfizer Worldwide Research and Development,
9381 Judicial Drive, Suite 200, San Diego, California 92121, United
States
| | - Ryan Preston
- Department of Analytical Sciences, CovX, Pfizer Worldwide Research and Development,
9381 Judicial Drive, Suite 200, San Diego, California 92121, United
States
| | - Michael Bacica
- Department of Analytical Sciences, CovX, Pfizer Worldwide Research and Development,
9381 Judicial Drive, Suite 200, San Diego, California 92121, United
States
| | - Arvind Kinhikar
- Department of Analytical Sciences, CovX, Pfizer Worldwide Research and Development,
9381 Judicial Drive, Suite 200, San Diego, California 92121, United
States
| | - Ben Bolaños
- Department of Oncology Platform Chemistry, Pfizer Worldwide Research and Development,
10770 Science Center Drive, La Jolla, California 92121, United States
| | - Robert E. Murphy
- Department of Analytical Sciences, CovX, Pfizer Worldwide Research and Development,
9381 Judicial Drive, Suite 200, San Diego, California 92121, United
States
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13
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Büyüktimkin B, Manikwar P, Kiptoo PK, Badawi AH, Stewart JM, Siahaan TJ. Vaccinelike and prophylactic treatments of EAE with novel I-domain antigen conjugates (IDAC): targeting multiple antigenic peptides to APC. Mol Pharm 2012; 10:297-306. [PMID: 23148513 DOI: 10.1021/mp300440x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The objective of this work is to utilize novel I-domain antigenic-peptide conjugates (IDAC) for targeting antigenic peptides to antigen-presenting cells (APC) to simulate tolerance in experimental autoimmune encephalomyelitis (EAE). IDAC-1 and IDAC-3 molecules are conjugates between the I-domain protein and PLP-Cys and Ac-PLP-Cys-NH(2) peptides, respectively, tethered to N-terminus and Lys residues on the I-domain. The hypothesis is that the I-domain protein binds to ICAM-1 and PLP peptide binds to MHC-II on the surface of APC; this binding event inhibits the formation of the immunological synapse at the APC-T-cell interface to alter T-cell differentiation from inflammatory to regulatory phenotypes. Conjugation of peptides to the I-domain did not change the secondary structure of IDAC molecules as determined by circular dichroism spectroscopy. The efficacies of IDAC-1 and -3 were evaluated in EAE mice by administering iv or sc injections of IDAC in a prophylactic or a vaccinelike dosing schedule. IDAC-3 was better than IDAC-1 in suppressing and delaying the onset of EAE when delivered in prophylactic and vaccinelike manners. IDAC-3 also suppressed subsequent relapse of the disease. The production of IL-17 was lowered in the IDAC-3-treated mice compared to those treated with PBS. In contrast, the production of IL-10 was increased, suggesting that there is a shift from inflammatory to regulatory T-cell populations in IDAC-3-treated mice. In conclusion, the I-domain can effectively deliver antigenic peptides in a vaccinelike or prophylactic manner for inducing immunotolerance in the EAE mouse model.
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Affiliation(s)
- Barlas Büyüktimkin
- Department of Pharmaceutical Chemistry, The University of Kansas, Simons Research Laboratories, 2095 Constant Avenue, Lawrence, Kansas 66047, United States
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Manikwar P, Büyüktimkin B, Kiptoo P, Badawi AH, Galeva NA, Williams TD, Siahaan TJ. I-domain-antigen conjugate (IDAC) for delivering antigenic peptides to APC: synthesis, characterization, and in vivo EAE suppression. Bioconjug Chem 2012; 23:509-17. [PMID: 22369638 PMCID: PMC3311109 DOI: 10.1021/bc200580j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The objectives of this work are to characterize the identity of I-domain-antigen conjugate (IDAC) and to evaluate the in vivo efficacy of IDAC in suppressing experimental autoimmune encephalomyelitis (EAE) in mouse model. The hypothesis is that the I-domain delivers PLP(139-151) peptides to antigen-presenting cells (APC) and alters the immune system by simultaneously binding to ICAM-1 and MHC-II, blocking immunological synapse formation. IDAC was synthesized by derivatizing the lysine residues with maleimide groups followed by conjugation with PLP-Cys-OH peptide. Conjugation with PLP peptide does not alter the secondary structure of the protein as determined by CD. IDAC suppresses the progression of EAE, while I-domain and GMB-I-domain could only delay the onset of EAE. As a positive control, Ac-PLP-BPI-NH(2)-2 can effectively suppress the progress of EAE. The number of conjugation sites and the sites of conjugations in IDAC were determined using tryptic digest followed by LC-MS analysis. In conclusion, conjugation of I-domain with an antigenic peptide (PLP) resulted in an active molecule to suppress EAE in vivo.
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Affiliation(s)
- Prakash Manikwar
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047, USA
| | - Barlas Büyüktimkin
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047, USA
| | - Paul Kiptoo
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047, USA
| | - Ahmed H. Badawi
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047, USA
| | - Nadezhda A. Galeva
- Mass Spectrometry/Analytical Proteomics Laboratory, University of Kansas, Lawrence, KS 66045, USA
| | - Todd D. Williams
- Mass Spectrometry/Analytical Proteomics Laboratory, University of Kansas, Lawrence, KS 66045, USA
| | - Teruna J. Siahaan
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047, USA
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