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Äärelä A, Auchynnikava T, Moisio O, Liljenbäck H, Andriana P, Iqbal I, Lehtimäki J, Rajander J, Salo H, Roivainen A, Airaksinen AJ, Virta P. In Vivo Imaging of [60]Fullerene-Based Molecular Spherical Nucleic Acids by Positron Emission Tomography. Mol Pharm 2023; 20:5043-5051. [PMID: 37531591 PMCID: PMC10548468 DOI: 10.1021/acs.molpharmaceut.3c00370] [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: 04/26/2023] [Revised: 07/19/2023] [Accepted: 07/19/2023] [Indexed: 08/04/2023]
Abstract
18F-Labeled [60]fullerene-based molecular spherical nucleic acids (MSNAs), consisting of a human epidermal growth factor receptor 2 (HER2) mRNA antisense oligonucleotide sequence with a native phosphodiester and phosphorothioate backbone, were synthesized, site-specifically labeled with a positron emitting fluorine-18 and intravenously administrated via tail vein to HER2 expressing HCC1954 tumor-bearing mice. The biodistribution of the MSNAs was monitored in vivo by positron emission tomography/computed tomography (PET/CT) imaging. MSNA with a native phosphodiester backbone (MSNA-PO) was prone to rapid nuclease-mediated degradation, whereas the corresponding phosphorothioate analogue (MSNA-PS) with improved enzymatic stability showed an interesting biodistribution profile in vivo. One hour after the injection, majority of the radioactivity was observed in spleen and liver but also in blood with an average tumor-to-muscle ratio of 2. The prolonged radioactivity in blood circulation may open possibilities to the targeted delivery of the MSNAs.
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Affiliation(s)
- Antti Äärelä
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
- Research
and Development, Orion Pharma, FI-20380 Turku, Finland
| | - Tatsiana Auchynnikava
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
- Turku
PET Centre, University of Turku, FI-20520 Turku, Finland
| | - Olli Moisio
- Turku
PET Centre, University of Turku, FI-20520 Turku, Finland
| | - Heidi Liljenbäck
- Turku
PET Centre, University of Turku, FI-20520 Turku, Finland
- Turku
Center for Disease Modeling, University
of Turku, FI-20520 Turku Finland
| | - Putri Andriana
- Turku
PET Centre, University of Turku, FI-20520 Turku, Finland
| | - Imran Iqbal
- Turku
PET Centre, University of Turku, FI-20520 Turku, Finland
| | - Jyrki Lehtimäki
- Research
and Development, Orion Pharma, FI-20380 Turku, Finland
| | - Johan Rajander
- Accelerator
Laboratory, Åbo Akademi University, FI-20520 Turku, Finland
| | - Harri Salo
- Research
and Development, Orion Pharma, FI-20380 Turku, Finland
| | - Anne Roivainen
- Turku
PET Centre, University of Turku, FI-20520 Turku, Finland
- Turku
Center for Disease Modeling, University
of Turku, FI-20520 Turku Finland
- Turku PET
Centre, Turku University Hospital, FI-20520 Turku, Finland
| | - Anu J. Airaksinen
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
- Turku
PET Centre, University of Turku, FI-20520 Turku, Finland
| | - Pasi Virta
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
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2
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Äärelä A, Räsänen K, Holm P, Salo H, Virta P. Synthesis of Site-Specific Antibody-[60]Fullerene-Oligonucleotide Conjugates for Cellular Targeting. ACS Appl Bio Mater 2023; 6:3189-3198. [PMID: 37432881 PMCID: PMC10445261 DOI: 10.1021/acsabm.3c00318] [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: 04/27/2023] [Accepted: 06/29/2023] [Indexed: 07/13/2023]
Abstract
An ideal therapeutic antibody-oligonucleotide conjugate (AOC) would be a uniform construct, contain a maximal oligonucleotide (ON) payload, and retain the antibody (Ab)-mediated binding properties, which leads to an efficient delivery of the ON cargo to the site of therapeutic action. Herein, [60]fullerene-based molecular spherical nucleic acids (MSNAs) have been site-specifically conjugated to antibodies (Abs), and the Ab-mediated cellular targeting of the MSNA-Ab conjugates has been studied. A well-established glycan engineering technology and robust orthogonal click chemistries yielded the desired uniform MSNA-Ab conjugates (MW ∼ 270 kDa), with an oligonucleotide (ON):Ab ratio of 24:1, in 20-26% isolated yields. These AOCs retained the antigen binding properties (Trastuzumab's binding to human epidermal growth factor receptor 2, HER2), studied by biolayer interferometry. In addition, Ab-mediated endocytosis was demonstrated with live-cell fluorescence and phase-contrast microscopy on BT-474 breast carcinoma cells, overexpressing HER2. The effect on cell proliferation was analyzed by label-free live-cell time-lapse imaging.
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Affiliation(s)
- Antti Äärelä
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
- Research
and Development, Orion Pharma, FI-20380 Turku, Finland
| | - Kati Räsänen
- Research
and Development, Orion Pharma, FI-20380 Turku, Finland
| | - Patrik Holm
- Research
and Development, Orion Pharma, FI-20380 Turku, Finland
| | - Harri Salo
- Research
and Development, Orion Pharma, FI-20380 Turku, Finland
| | - Pasi Virta
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
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Auchynnikava T, Äärelä A, Moisio O, Liljenbäck H, Andriana P, Iqbal I, Li XG, Virta P, Roivainen A, Airaksinen A. Radiolabeling and biological evaluation of functionalized spherical nucleic acids. Nucl Med Biol 2022. [DOI: 10.1016/s0969-8051(22)00117-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gulumkar V, Tähtinen V, Ali A, Rahkila J, Valle-Delgado JJ, Äärelä A, Österberg M, Yliperttula M, Virta P. Synthesis of an Azide- and Tetrazine-Functionalized [60]Fullerene and Its Controlled Decoration with Biomolecules. ACS Omega 2022; 7:1329-1336. [PMID: 35036794 PMCID: PMC8757328 DOI: 10.1021/acsomega.1c05955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 12/17/2021] [Indexed: 05/12/2023]
Abstract
Bingel cyclopropanation between Buckminster fullerene and a heteroarmed malonate was utilized to produce a hexakis-functionalized C60 core, with azide and tetrazine units. This orthogonally bifunctional C60 scaffold can be selectively one-pot functionalized by two pericyclic click reactions, that is, inverse electron-demand Diels-Alder and azide-alkyne cycloaddition, which with appropriate ligands (monosaccharides, a peptide and oligonucleotides tested) allows one to control the assembly of heteroantennary bioconjugates.
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Affiliation(s)
- Vijay Gulumkar
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
| | - Ville Tähtinen
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
| | - Aliaa Ali
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
| | - Jani Rahkila
- Instrument
Centre, Faculty of Science and Engineering, Åbo Akademi University, FI-20500 Åbo, Finland
| | | | - Antti Äärelä
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
| | - Monika Österberg
- Department
of Bioproducts and Biosystems, Aalto University, FI-00076 Aalto, Finland
| | - Marjo Yliperttula
- Division
of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Pasi Virta
- Department
of Chemistry, University of Turku, FI-20500 Turku, Finland
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Aro-Heinilä A, Lepistö A, Äärelä A, Lönnberg TA, Virta P. 2-Trifluoromethyl-6-mercurianiline Nucleotide, a Sensitive 19F NMR Probe for Hg(II)-mediated Base Pairing. J Org Chem 2022; 87:137-146. [PMID: 34905374 PMCID: PMC8749955 DOI: 10.1021/acs.joc.1c02056] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Indexed: 01/02/2023]
Abstract
A 2-trifluoromethylaniline C-nucleoside was synthesized, incorporated in the middle of an oligonucleotide, and mercurated. The affinity of the mercurated oligonucleotide toward complementary strands placing each of the canonical nucleobases opposite to the organomercury nucleobase analogue was examined by ultraviolet (UV), circular dichroism (CD), and 19F NMR spectroscopy analyses. According to the UV melting profile analysis, the organomercury nucleobase analogue showed increased affinities in the order T > G > C > A. The CD profiles indicated the typical B-type helix in each case. The 19F resonance signal proved sensitive for the local environmental changes, showing clearly distinct signals for the duplexes with different opposing nucleobases. Furthermore, valuable information on the mercurated oligonucleotide and its binding to complementary strands at varying temperature could be obtained by 19F NMR spectroscopy.
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Affiliation(s)
- Asmo Aro-Heinilä
- Department of Chemistry, University
of Turku, Henrikinkatu 2, 20500 Turku, Finland
| | - Assi Lepistö
- Department of Chemistry, University
of Turku, Henrikinkatu 2, 20500 Turku, Finland
| | - Antti Äärelä
- Department of Chemistry, University
of Turku, Henrikinkatu 2, 20500 Turku, Finland
| | | | - Pasi Virta
- Department of Chemistry, University
of Turku, Henrikinkatu 2, 20500 Turku, Finland
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Österlund T, Aho A, Äärelä A, Tähtinen V, Korhonen H, Virta P. Immobilized Carbohydrates for Preparation of 3'-Glycoconjugated Oligonucleotides. ACTA ACUST UNITED AC 2021; 83:e122. [PMID: 33290641 DOI: 10.1002/cpnc.122] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A detailed protocol for preparation 3'-glycoconjugated oligonucleotides is described based on one-pot immobilization of 4,4'-dimethoxytrityl-protected carbohydrates to a solid support followed by on-support peracetylation and automated oligonucleotide assembly. Compared to an appropriate building block approach and post-synthetic manipulation of oligonucleotides, this protocol may simplify the synthesis scheme and increase overall yield of the conjugates. Furthermore, the immobilization to a solid support typically increases the stability of reactants, enabling prolonged storage, and makes subsequent processing convenient. Automated assembly on these carbohydrate-modified supports using conventional phosphoramidite chemistry produces 3'-glycoconjugated oligonucleotides in relatively high yield and purity. © 2020 Wiley Periodicals LLC. Basic Protocol 1: Synthesis of 1-O-tert-butyldimethylsilyl-6-O-(4,4'-dimethoxytrityl)-β-D-glucose Basic Protocol 2: Synthesis of 6-O-dimethoxytrityl-2,3,1',3',4',6'-hexa-O-benzoylsucrose Basic Protocol 3: Synthesis of 6″-O-dimethoxytrityl-N-trifluoroacetyl-protected aminoglycosides Basic Protocol 4: Synthesis of 3-O-dimethoxytrityl-propyl β-D-galactopyranoside Basic Protocol 5: Synthesis of trivalent N-acetyl galactosamine cluster Basic Protocol 6: Synthesis of carbohydrate monosuccinates and their immobilization to a solid support Basic Protocol 7: Oligonucleotide synthesis using immobilized carbohydrates.
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Affiliation(s)
- Tommi Österlund
- Department of Chemistry, University of Turku, Turku, Finland
| | - Aapo Aho
- Department of Chemistry, University of Turku, Turku, Finland
| | - Antti Äärelä
- Department of Chemistry, University of Turku, Turku, Finland
| | - Ville Tähtinen
- Department of Chemistry, University of Turku, Turku, Finland
| | - Heidi Korhonen
- Department of Chemistry, University of Turku, Turku, Finland
| | - Pasi Virta
- Department of Chemistry, University of Turku, Turku, Finland
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Gulumkar V, Äärelä A, Moisio O, Rahkila J, Tähtinen V, Leimu L, Korsoff N, Korhonen H, Poijärvi-Virta P, Mikkola S, Nesati V, Vuorimaa-Laukkanen E, Viitala T, Yliperttula M, Roivainen A, Virta P. Controlled Monofunctionalization of Molecular Spherical Nucleic Acids on a Buckminster Fullerene Core. Bioconjug Chem 2021; 32:1130-1138. [PMID: 33998229 PMCID: PMC8382215 DOI: 10.1021/acs.bioconjchem.1c00187] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
An azide-functionalized
12-armed Buckminster fullerene has been
monosubstituted in organic media with a substoichiometric amount of
cyclooctyne-modified oligonucleotides. Exposing the intermediate products
then to the same reaction (i.e., strain-promoted alkyne–azide
cycloaddition, SPAAC) with an excess of slightly different oligonucleotide
constituents in an aqueous medium yields molecularly defined monofunctionalized
spherical nucleic acids (SNAs). This procedure offers a controlled
synthesis scheme in which one oligonucleotide arm can be functionalized
with labels or other conjugate groups (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic
acid, DOTA, and Alexa-488 demonstrated), whereas the rest of the 11
arms can be left unmodified or modified by other conjugate groups
in order to decorate the SNAs’ outer sphere. Extra attention
has been paid to the homogeneity and authenticity of the C60-azide scaffold used for the assembly of full-armed SNAs.
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Affiliation(s)
- Vijay Gulumkar
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Antti Äärelä
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Olli Moisio
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland
| | - Jani Rahkila
- Instrument Centre, Faculty of Science and Engineering, Åbo Akademi University, FI-20500 Åbo, Finland
| | - Ville Tähtinen
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Laura Leimu
- Department of Biologics, Orion Pharma, 20101 Turku, Finland
| | - Niko Korsoff
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Heidi Korhonen
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | | | - Satu Mikkola
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Victor Nesati
- Department of Biologics, Orion Pharma, 20101 Turku, Finland
| | | | - Tapani Viitala
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014, Helsinki, Finland
| | - Marjo Yliperttula
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014, Helsinki, Finland
| | - Anne Roivainen
- Turku PET Centre, University of Turku, FI-20520 Turku, Finland
| | - Pasi Virta
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland.,Department of Biologics, Orion Pharma, 20101 Turku, Finland
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Kushnarova-Vakal A, Äärelä A, Huovinen T, Virta P, Lamminmäki U. Site-Specific Linking of an Oligonucleotide to Mono- and Bivalent Recombinant Antibodies with SpyCatcher-SpyTag System for Immuno-PCR. ACS Omega 2020; 5:24927-24934. [PMID: 33015512 PMCID: PMC7528495 DOI: 10.1021/acsomega.0c03750] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
Antibody-oligonucleotide conjugates (AOCs) are a versatile class of chimeric biomolecules for therapeutics and biotechnological applications. Most widely employed chemical labeling methods for proteins are based on targeting of Lys or Cys residues that leads to mixed stoichiometry in the degree of conjugation and may interfere with antigen binding, thus, compromising the function of the antibody. A site-specific oligonucleotide conjugation technology providing full control over valency in mild reaction conditions would be an advancement to the state-of-the-art in bioconjugation. Herein, we demonstrate the production of single-chain variable fragment antibodies with fused SpyCatcher (scFv-SpyCatcher, monovalent) and alkaline phosphatase-SpyCatcher (scFv-AP-SpyCatcher, bivalent) on C-terminus and their conjugation to SpyTag002-oligonucleotide in phosphate-buffered saline (PBS). The formation of a covalent isopeptide bond between the protein and SpyTag002-oligonucleotide was confirmed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis, and the functionality of the obtained AOCs was confirmed in immuno-polymerase chain reaction (PCR) assays for the detection of microcystin-LR and 17β-estradiol. Based on time-resolved fluorescence immunoassays with scFv-AP fusion constructs, we observed that the SpyCatcher and SpyCatcher-SpyTag002-oligonucleotide part lowered the absolute signal obtained from the assay by 27.6 and 48.4% at 2 nM and by 26.2 and 27.6% at 100 pM microcystin-LR and 17β-estradiol concentrations, respectively. Nevertheless, the overall sensitivity of the immuno-PCR assays was similar to the time-resolved fluorescence immunoassays performed with the same components. In this study, vectors for SpyCatcher-fusion construction were created for directional cloning with SfiI sites enabling the rapid generation of AOC constructs for site-specific SpyTag-oligonucleotide conjugation.
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Affiliation(s)
| | - Antti Äärelä
- Department of Biochemistry and Department of Chemistry, University of Turku, 20500 Turku, Finland
| | - Tuomas Huovinen
- Department of Biochemistry and Department of Chemistry, University of Turku, 20500 Turku, Finland
| | - Pasi Virta
- Department of Biochemistry and Department of Chemistry, University of Turku, 20500 Turku, Finland
| | - Urpo Lamminmäki
- Department of Biochemistry and Department of Chemistry, University of Turku, 20500 Turku, Finland
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