1
|
Alcantara MB, Tang WS, Wang D, Kaniowski D, Kang E, Dizman N, Chehrazi-Raffle A, Meza L, Zengin Z, Hall J, Hsu J, Egelston C, Moreira D, Horsager A, Pal SK, Kortylewski M. Targeting STAT3 in tumor-associated antigen-presenting cells as a strategy for kidney and bladder cancer immunotherapy. Front Immunol 2024; 14:1274781. [PMID: 38259453 PMCID: PMC10800835 DOI: 10.3389/fimmu.2023.1274781] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction Immune checkpoint blockade (ICB) improved clinical outcomes in renal and bladder cancer patients, but the response rates remain limited especially in metastatic disease. While STAT3 transcription factor is well-known master regulator of tumor immune evasion, little is known about the role of STAT3 in the resistance of renal or bladder cancers to immunotherapy. Methods To better understand immune alterations associated with ICB resistance, we assessed blood biomarkers in renal cancer patients classified as responders or non-responders to first line nivolumab/ipilimumab immunotherapy. Results We observed that non-responders showed elevated levels of proinflammatory mediators, such as IL-1RA, IL-6, IL-8 and to lesser extent IL-10, which are associated with STAT3 activation and tumor immunosuppression. In addition, we found STAT3 activation primarily in circulating myeloid immune cells such as tolerogenic MDSCs. To assess whether STAT3 inhibition within these cell subsets can promote antitumor immune responses and/or enhance sensitivity to ICB in vivo, we used an original antisense oligonucleotide (ASO) strategy for myeloid-cell selective STAT3 knockdown (CpG-STAT3ASO). Our results in syngeneic models of renal and bladder cancers in mice demonstrated potent antitumor activity of CpG-STAT3ASO alone in contrast to PD1 blockade alone in both models. The CpG-STAT3ASO/anti-PD1 combination improved therapeutic efficacy especially against bladder tumors. Therapeutic efficacy correlated with activation of dendritic cells (DCs) and M1 macrophages in the tumor microenvironment, reduced percentages of regulatory T cells (Tregs) and the expansion of CD8 T cells in both tumor models. Discussion/Conclusion Our study underscores the potential of using myeloid-cell targeted CpG-STAT3 inhibitors for genitourinary cancer therapy to disrupt tolerogenic signaling, restore immune cell activity and sensitivity to immune checkpoint inhibitors and/or T cell-based immunotherapies.
Collapse
Affiliation(s)
- Marice B. Alcantara
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | - Wilson S. Tang
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | - Dongfang Wang
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | - Damian Kaniowski
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | - Elaine Kang
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | - Nazli Dizman
- Department of Medical Oncology, City of Hope National Medical Centre, Duarte, CA, United States
- MD Anderson Cancer Center, Department of Hematology and Oncology, Houston, TX, United States
| | | | - Luis Meza
- Department of Medical Oncology, City of Hope National Medical Centre, Duarte, CA, United States
| | - Zeynep Zengin
- Department of Medical Oncology, City of Hope National Medical Centre, Duarte, CA, United States
| | - Jeremy Hall
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | - JoAnn Hsu
- Department of Medical Oncology, City of Hope National Medical Centre, Duarte, CA, United States
| | - Colt Egelston
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | - Dayson Moreira
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| | | | - Sumanta K. Pal
- Department of Medical Oncology, City of Hope National Medical Centre, Duarte, CA, United States
| | - Marcin Kortylewski
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States
| |
Collapse
|
2
|
Maliszewska-Olejniczak K, Kaniowski D, Araszkiewicz M, Tymińska K, Korgul A. Molecular Mechanisms of Specific Cellular DNA Damage Response and Repair Induced by the Mixed Radiation Field During Boron Neutron Capture Therapy. Front Oncol 2021; 11:676575. [PMID: 34094980 PMCID: PMC8170402 DOI: 10.3389/fonc.2021.676575] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 03/05/2021] [Accepted: 04/28/2021] [Indexed: 01/04/2023] Open
Abstract
The impact of a mixed neutron-gamma beam on the activation of DNA damage response (DDR) proteins and non-coding RNAs (ncRNAs) is poorly understood. Ionizing radiation is characterized by its biological effectiveness and is related to linear energy transfer (LET). Neutron-gamma mixed beam used in boron neutron capture therapy (BNCT) can induce another type of DNA damage such as clustered DNA or multiple damaged sites, as indicated for high LET particles, such as alpha particles, carbon ions, and protons. We speculate that after exposure to a mixed radiation field, the repair capacity might reduce, leading to unrepaired complex DNA damage for a long period and may promote genome instability and cell death. This review will focus on the poorly studied impact of neutron-gamma mixed beams with an emphasis on DNA damage and molecular mechanisms of repair. In case of BNCT, it is not clear which repair pathway is involved, and recent experimental work will be presented. Further understanding of BNCT-induced DDR mechanisms may lead to improved therapeutic efficiency against different tumors.
Collapse
Affiliation(s)
| | - Damian Kaniowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
| | - Martyna Araszkiewicz
- Faculty of Physics, University of Warsaw, Warsaw, Poland.,Nuclear Facilities Operations Department, National Centre for Nuclear Research, Otwock, Poland
| | - Katarzyna Tymińska
- Nuclear Facilities Operations Department, National Centre for Nuclear Research, Otwock, Poland
| | | |
Collapse
|
3
|
Kaniowski D, Ebenryter-Olbińska K, Kulik K, Suwara J, Cypryk W, Jakóbik-Kolon A, Leśnikowski Z, Nawrot B. Composites of Nucleic Acids and Boron Clusters (C 2B 10H 12) as Functional Nanoparticles for Downregulation of EGFR Oncogene in Cancer Cells. Int J Mol Sci 2021; 22:ijms22094863. [PMID: 34064412 PMCID: PMC8125477 DOI: 10.3390/ijms22094863] [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] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/27/2021] [Accepted: 04/30/2021] [Indexed: 12/29/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) is one of the most promising molecular targets for anticancer therapy. We used boron clusters as a platform for generation of new materials. For this, functional DNA constructs conjugated with boron clusters (B-ASOs) were developed. These B-ASOs, built from 1,2-dicarba-closo-dodecaborane linked with two anti-EGFR antisense oligonucleotides (ASOs), form with their complementary congeners torus-like nanostructures, as previously shown by atomic force microscope (AFM) and transmission electron cryo-microscopy (cryo-TEM) imaging. In the present work, deepened studies were carried out on B-ASO's properties. In solution, B-ASOs formed four dominant complexes as confirmed by non-denaturing polyacrylamide gel electrophoresis (PAGE). These complexes exhibited increased stability in cell lysate comparing to the non-modified ASO. Fluorescently labeled B-ASOs localized mostly in the cytoplasm and decreased EGFR expression by activating RNase H. Moreover, the B-ASO complexes altered the cancer cell phenotype, decreased cell migration rate, and arrested the cells in the S phase of cell cycle. The 1,2-dicarba-closo-dodecaborane-containing nanostructures did not activate NLRP3 inflammasome in human macrophages. In addition, as shown by inductively coupled plasma mass spectrometry (ICP MS), these nanostructures effectively penetrated the human squamous carcinoma cells (A431), showing their potential applicability as anticancer agents.
Collapse
Affiliation(s)
- Damian Kaniowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.E.-O.); (K.K.); (J.S.); (W.C.)
| | - Katarzyna Ebenryter-Olbińska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.E.-O.); (K.K.); (J.S.); (W.C.)
| | - Katarzyna Kulik
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.E.-O.); (K.K.); (J.S.); (W.C.)
| | - Justyna Suwara
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.E.-O.); (K.K.); (J.S.); (W.C.)
| | - Wojciech Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.E.-O.); (K.K.); (J.S.); (W.C.)
| | - Agata Jakóbik-Kolon
- Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 6, 44-100 Gliwice, Poland;
| | - Zbigniew Leśnikowski
- Laboratory of Medicinal Chemistry, Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 92-232 Lodz, Poland;
| | - Barbara Nawrot
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.E.-O.); (K.K.); (J.S.); (W.C.)
- Correspondence: ; Tel.: +48-42-6803248
| |
Collapse
|
4
|
Gudanis D, Kaniowski D, Kulik K, Baranowski D, Gdaniec Z, Nawrot B. Formation of an RNA Quadruplex-Duplex Hybrid in Living Cells between mRNA of the Epidermal Growth Factor Receptor (EGFR) and a G-Rich Antisense Oligoribonucleotide. Cells 2020; 9:cells9112375. [PMID: 33138194 PMCID: PMC7692301 DOI: 10.3390/cells9112375] [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] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 02/07/2023] Open
Abstract
Antisense DNA oligonucleotides, short interfering RNAs (siRNAs), and CRISPR/Cas9 genetic tools are the most useful therapeutic nucleic acids regulating gene expression based on the antisense specificity towards messenger RNA. Here, we present an effective novel strategy for inhibiting translation based on the antisense-controlled formation of an RNA quadruplex-duplex hybrid (QDH) between a G-rich RNA antisense oligoribonucleotide (Q-ASO) and specific mRNA, comprising two distant G-tracts. We selected epidermal growth factor receptor (EGFR) as a well-established target protein in anticancer therapy. The chemically modified, bi-functional anti-EGFR Q-ASO and a 56-nt long EGFR mRNA fragment, in the presence of potassium ions, were shown to form in vitro very stable parallel G-quadruplex containing a 28-nt long external loop folding to two duplex-stem structure. Besides, the Q-ASOs effectively reduced EGFR mRNA levels compared to the non-modified RNA and DNA antisense oligonucleotides (rASO, dASO). In addition, the hybridization specificity of Q-ASO comprising a covalently attached fluorescent tag was confirmed in living cells by visualization of the G4 green fluorescent species in the presence of other antisense inhibitors under competitive conditions. The results presented here offer novel insights into the potential application of Q-ASOs for the detection and/or alteration of (patho)biological processes through RNA:RNA quadruplex-duplex formation in cellular systems.
Collapse
Affiliation(s)
- Dorota Gudanis
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland; (D.B.); (Z.G.)
- Correspondence: ; Tel.: +48-61-852-85-03 (ext. 1286)
| | - Damian Kaniowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Poland; (D.K.); (K.K.); (B.N.)
| | - Katarzyna Kulik
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Poland; (D.K.); (K.K.); (B.N.)
| | - Daniel Baranowski
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland; (D.B.); (Z.G.)
| | - Zofia Gdaniec
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland; (D.B.); (Z.G.)
| | - Barbara Nawrot
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Poland; (D.K.); (K.K.); (B.N.)
| |
Collapse
|
5
|
Kaniowski D, Kulik K, Ebenryter-Olbińska K, Wielgus E, Lesnikowski Z, Nawrot B. Metallacarborane Complex Boosts the Rate of DNA Oligonucleotide Hydrolysis in the Reaction Catalyzed by Snake Venom Phosphodiesterase. Biomolecules 2020; 10:biom10050718. [PMID: 32380792 PMCID: PMC7277537 DOI: 10.3390/biom10050718] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 04/07/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 12/17/2022] Open
Abstract
Antisense oligonucleotides conjugated with boron clusters (B-ASOs) have been described as potential gene expression inhibitors and carriers of boron for boron neutron capture therapy (BNCT), providing a dual-action therapeutic platform. In this study, we tested the nucleolytic stability of DNA oligonucleotides labeled with metallacarborane [(3,3'-iron-1,2,1',2'-dicarbollide)(-1)]ate [Fe(C2B9H11)2] (FESAN) against snake venom phosphodiesterase (svPDE, 3'→5'-exonuclease). Contrary to the previously observed protective effect of carborane (C2B10H12) modifications, the B-ASOs containing a metallacarborane moiety at the 5'-end of the oligonucleotide chain were hydrolyzed faster than their parent nonmodified oligomers. Interestingly, an enhancement in the hydrolysis rate was also observed in the presence of free metallacarborane, and this reaction was dependent on the concentration of the metallacarborane. Microscale thermophoresis (MST) analysis confirmed the high affinity (Kd nM range) of the binding of the metallacarborane to the proteins of crude snake venom and the moderate affinity (Kd µM range) between the metallacarborane and the short single-stranded DNA. We hypothesize that the metallacarborane complex covalently bound to B-ASO holds DNA molecules close to the protein surface, facilitating enzymatic cleavage. The addition of metallacarborane alone to the ASO/svPDE reaction mixture provides the interface to attract freely floating DNA molecules. In both cases, the local DNA concentration around the enzymes increases, giving rise to faster hydrolysis. It was experimentally shown that an allosteric effect, possibly attributable to the observed boost in the 3´→5´-exonucleolytic activity of snake venom phosphodiesterase, is much less plausible.
Collapse
Affiliation(s)
- Damian Kaniowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.K.); (K.E.-O.); (E.W.)
| | - Katarzyna Kulik
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.K.); (K.E.-O.); (E.W.)
| | - Katarzyna Ebenryter-Olbińska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.K.); (K.E.-O.); (E.W.)
| | - Ewelina Wielgus
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.K.); (K.E.-O.); (E.W.)
| | - Zbigniew Lesnikowski
- Institute of Medical Biology, Polish Academy of Sciences, Laboratory of Medicinal Chemistry, 106 Lodowa St., 92-232 Lodz, Poland;
| | - Barbara Nawrot
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (D.K.); (K.K.); (K.E.-O.); (E.W.)
- Correspondence: ; Tel.: +48-42-6803248
| |
Collapse
|
6
|
Kaniowski D, Ebenryter-Olbinska K, Kulik K, Janczak S, Maciaszek A, Bednarska-Szczepaniak K, Nawrot B, Lesnikowski Z. Boron clusters as a platform for new materials: composites of nucleic acids and oligofunctionalized carboranes (C 2B 10H 12) and their assembly into functional nanoparticles. Nanoscale 2020; 12:103-114. [PMID: 31763634 DOI: 10.1039/c9nr06550d] [Citation(s) in RCA: 19] [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] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nucleic acids are key biomolecules in all life forms. These biomolecules can encode and transfer information via Watson-Crick base-pairing interactions and can form double-stranded structures between complementary sequences with high precision. These properties make nucleic acids extremely successful in applications in materials science as nanoconstruction materials. Herein, we describe a method for the automated synthesis of "oligopeds", which are building blocks based on the boron cluster structure equipped with short DNA adapters; these building blocks assemble into functional nanoparticles. The obtained, well defined, torus-like structures are the first DNA nanoconstructs based on a boron cluster scaffold. The results indicate the potential of boron clusters in DNA nanoconstruction and open the way for the design of entirely new types of buildings blocks based on polyhedral heteroborane geometry and its unique properties. The use of antisense oligonucleotides as DNA adapters illustrates one of the possible applications of the obtained nanoconstructs as vectors for therapeutic nucleic acids.
Collapse
Affiliation(s)
- Damian Kaniowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Katarzyna Ebenryter-Olbinska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Katarzyna Kulik
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Slawomir Janczak
- Institute of Medical Biology, Polish Academy of Sciences, 106 Lodowa St., 92-232 Lodz, Poland.
| | - Anna Maciaszek
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | | | - Barbara Nawrot
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Zbigniew Lesnikowski
- Institute of Medical Biology, Polish Academy of Sciences, 106 Lodowa St., 92-232 Lodz, Poland.
| |
Collapse
|
7
|
Ebenryter-Olbińska K, Kaniowski D, Sobczak M, Wojtczak BA, Janczak S, Wielgus E, Nawrot B, Leśnikowski ZJ. Versatile Method for the Site-Specific Modification of DNA with Boron Clusters: Anti-Epidermal Growth Factor Receptor (EGFR) Antisense Oligonucleotide Case. Chemistry 2017; 23:16535-16546. [PMID: 28881435 DOI: 10.1002/chem.201702957] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/20/2017] [Indexed: 11/10/2022]
Abstract
A general and convenient approach for the incorporation of different types of boron clusters into specific locations of the DNA-oligonucleotide chain based on the automated phosphoramidite method of oligonucleotide synthesis and post-synthetic "click chemistry" modification has been developed. Pronounced effects of boron-cluster modification on the physico- and biochemical properties of the antisense oligonucleotides were observed. The silencing activity of antisense oligonucleotides bearing a single boron cluster modification in the middle of the oligonucleotide chain was substantially higher than that of unmodified oligonucleotides. This finding may be of importance for the design of therapeutic nucleic acids with improved properties. The proposed synthetic methodology broadens the availability of nucleic acid-boron cluster conjugates and opens up new avenues for their potential practical use.
Collapse
Affiliation(s)
- Katarzyna Ebenryter-Olbińska
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Damian Kaniowski
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Milena Sobczak
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Błażej A Wojtczak
- Laboratory of Molecular Virology and Biological Chemistry, Institute of Medical Biology of the Polish Academy of Sciences, 106 Lodowa St., 92-232, Lodz, Poland.,Present address: University of Warsaw, Center of New Technologies, S. Banacha 2c, 02-097, Warsaw, Poland
| | - Sławomir Janczak
- Laboratory of Molecular Virology and Biological Chemistry, Institute of Medical Biology of the Polish Academy of Sciences, 106 Lodowa St., 92-232, Lodz, Poland
| | - Ewelina Wielgus
- Laboratory for Analysis of Organic Compounds and Polymers, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Barbara Nawrot
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland
| | - Zbigniew J Leśnikowski
- Laboratory of Molecular Virology and Biological Chemistry, Institute of Medical Biology of the Polish Academy of Sciences, 106 Lodowa St., 92-232, Lodz, Poland
| |
Collapse
|
8
|
Kaniowski D, Ebenryter-Olbińska K, Sobczak M, Wojtczak B, Janczak S, Leśnikowski ZJ, Nawrot B. High Boron-loaded DNA-Oligomers as Potential Boron Neutron Capture Therapy and Antisense Oligonucleotide Dual-Action Anticancer Agents. Molecules 2017; 22:molecules22091393. [PMID: 28832537 PMCID: PMC6151803 DOI: 10.3390/molecules22091393] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 08/14/2017] [Indexed: 02/06/2023] Open
Abstract
Boron cluster-modified therapeutic nucleic acids with improved properties are of interest in gene therapy and in cancer boron neutron capture therapy (BNCT). High metallacarborane-loaded antisense oligonucleotides (ASOs) targeting epidermal growth factor receptor (EGFR) were synthesized through post-synthetic Cu (I)-assisted “click” conjugation of alkyne-modified DNA-oligonucleotides with a boron cluster alkyl azide component. The obtained oligomers exhibited increased lipophilicity compared to their non-modified precursors, while their binding affinity to complementary DNA and RNA strands was slightly decreased. Multiple metallacarborane residues present in the oligonucleotide chain, each containing 18 B-H groups, enabled the use of IR spectroscopy as a convenient analytical method for these oligomers based on the diagnostic B-H signal at 2400–2650 cm−1. The silencing activity of boron cluster-modified ASOs used at higher concentrations was similar to that of unmodified oligonucleotides. The screened ASOs, when used in low concentrations (up to 50 μM), exhibited pro-oxidative properties by inducing ROS production and an increase in mitochondrial activities in HeLa cells. In contrast, when used at higher concentrations, the ASOs exhibited anti-oxidative properties by lowering ROS species levels. In the HeLa cells (tested in the MTT assay) treated (without lipofectamine) or transfected with the screened compounds, the mitochondrial activity remained equal to the control level or only slightly changed (±30%). These findings may be useful in the design of dual-action boron cluster-modified therapeutic nucleic acids with combined antisense and anti-oxidant properties.
Collapse
Affiliation(s)
- Damian Kaniowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Department of Bioorganic Chemistry, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Katarzyna Ebenryter-Olbińska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Department of Bioorganic Chemistry, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Milena Sobczak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Department of Bioorganic Chemistry, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Błażej Wojtczak
- Institute of Medical Biology of the Polish Academy of Sciences, Laboratory of Molecular Virology and Biological Chemistry, 106 Lodowa St., 92-232 Lodz, Poland.
| | - Sławomir Janczak
- Institute of Medical Biology of the Polish Academy of Sciences, Laboratory of Molecular Virology and Biological Chemistry, 106 Lodowa St., 92-232 Lodz, Poland.
| | - Zbigniew J Leśnikowski
- Institute of Medical Biology of the Polish Academy of Sciences, Laboratory of Molecular Virology and Biological Chemistry, 106 Lodowa St., 92-232 Lodz, Poland.
| | - Barbara Nawrot
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Department of Bioorganic Chemistry, Sienkiewicza 112, 90-363 Lodz, Poland.
| |
Collapse
|