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Toshiyama R, Konno M, Eguchi H, Takemoto H, Noda T, Asai A, Koseki J, Haraguchi N, Ueda Y, Matsushita K, Asukai K, Ohashi T, Iwagami Y, Yamada D, Sakai D, Asaoka T, Kudo T, Kawamoto K, Gotoh K, Kobayashi S, Satoh T, Doki Y, Nishiyama N, Mori M, Ishii H. Poly(ethylene glycol)-poly(lysine) block copolymer-ubenimex conjugate targets aminopeptidase N and exerts an antitumor effect in hepatocellular carcinoma stem cells. Oncogene 2018; 38:244-260. [PMID: 30089817 DOI: 10.1038/s41388-018-0406-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 05/13/2018] [Accepted: 06/08/2018] [Indexed: 12/30/2022]
Abstract
Previous studies highlighted that aminopeptidase N (APN)/CD13 acts as a scavenger in the survival of hepatocellular carcinoma (HCC) stem cells by reducing reactive oxygen species (ROS) levels. Hence, it has been proposed that APN/CD13 inhibition can increase cellular ROS levels and sensitize cells to chemotherapeutic agents. Although ubenimex, also known as bestatin, competitively inhibits proteases such as APN/CD13 on the cellular membrane and it is clinically used for patients with acute myeloid leukemia and lymphedema, research has demonstrated that higher concentrations of the agent induce the death of APN/CD13+ HCC stem cells. In this study, we developed a poly(ethylene glycol)-poly(lysine) block copolymer-ubenimex conjugate (PEG-b-PLys(Ube)) to increase the efficacy of reagents in APN/CD13+ cancer stem cells. Exposure to PEG-b-PLys(Ube) increased the intracellular ROS concentration by inhibiting APN enzyme activity, permitting the induction of apoptosis and attenuation of HCC cell proliferation. In addition, PEG-b-PLys(Ube) exhibited a relatively stronger antitumor effect in mice than PEG-b-PLys alone or phosphate-buffered saline. Moreover, an isobologram analysis revealed that combinations of fluorouracil, cisplatin, or doxorubicin with PEG-b-PLys(Ube) exhibited synergistic effects. This study demonstrated that PEG-b-PLys(Ube) does not impair the properties of ubenimex and exerts a potent antitumor effect.
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Suruga K, Dai K, Kobayashi Y, Ikegami Y, Nakao Y, Takemoto H, Higaki T, Ooi K, Kawase T, Nakama Y, Suenari K, Nishioka K, Otsuka M, Masaoka Y, Shiode N. P2275Are cholesterol crystals findings predictors for progression of non-culprit coronary plaque after acute myocardial infarction? (From optical coherence tomography study). Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ranneh A, Takemoto H, Sakuma S, Awaad A, Nomoto T, Mochida Y, Matsui M, Tomoda K, Naito M, Nishiyama N. An Ethylenediamine‐based Switch to Render the Polyzwitterion Cationic at Tumorous pH for Effective Tumor Accumulation of Coated Nanomaterials. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ranneh AH, Takemoto H, Sakuma S, Awaad A, Nomoto T, Mochida Y, Matsui M, Tomoda K, Naito M, Nishiyama N. An Ethylenediamine-based Switch to Render the Polyzwitterion Cationic at Tumorous pH for Effective Tumor Accumulation of Coated Nanomaterials. Angew Chem Int Ed Engl 2018; 57:5057-5061. [PMID: 29512262 DOI: 10.1002/anie.201801641] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Indexed: 02/06/2023]
Abstract
Polyzwitterions are employed as coating polymers for biomaterials to induce an antifouling property on the surface. Fine-tuning the betaine structure switches the antifouling property to be interactive with anionic tissue constituents in response to a tumorous pH gradient. The ethylenediamine moiety in the carboxybetaine enabled stepwise protonation and initiated the di-protonation process around tumorous pH (6.5). The net charge of the developed polyzwitterion (PGlu(DET-Car)) was thus neutral at pH 7.4 for antifouling, but was cationic at pH 6.5 for interaction with anionic constituents. Quantum dots coated with PGlu(DET-Car) exhibited comparable stealth and enhanced tumor accumulation relative to the PEG system. The present study provides a novel design of smart switchable polyzwitterion based on a precise control of the net charge.
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Takemoto H, Fukushima R, Ishii S, Endo R, Koyama Y, Saito K, Noda S, Mihara C, Yamaguchi M, Kotani J. SUN-P229: Nutritional Status of Cancer Patients Seen from Nutritionday Oncology in Japan 2015. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30399-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Naito M, Azuma R, Takemoto H, Hori M, Yoshinaga N, Osawa S, Kamegawa R, Kim HJ, Ishii T, Nishiyama N, Miyata K, Kataoka K. Multilayered polyion complexes with dissolvable silica layer covered by controlling densities of cRGD-conjugated PEG chains for cancer-targeted siRNA delivery. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:1109-1123. [DOI: 10.1080/09205063.2017.1301775] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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32
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Osawa S, Ishii T, Takemoto H, Osada K, Kataoka K. A facile amino-functionalization of poly(2-oxazoline)s’ distal end through sequential azido end-capping and Staudinger reactions. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.11.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Huang CH, Takemoto H, Nomoto T, Tomoda K, Matsui M, Nishiyama N. Cover Picture: Utility of the 2-Nitrobenzenesulfonamide Group as a Chemical Linker for Enhanced Extracellular Stability and Cytosolic Cleavage in siRNA-Conjugated Polymer Systems (ChemMedChem 1/2017). ChemMedChem 2017. [DOI: 10.1002/cmdc.201600622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Yi Y, Kim HJ, Mi P, Zheng M, Takemoto H, Toh K, Kim BS, Hayashi K, Naito M, Matsumoto Y, Miyata K, Kataoka K. Targeted systemic delivery of siRNA to cervical cancer model using cyclic RGD-installed unimer polyion complex-assembled gold nanoparticles. J Control Release 2016; 244:247-256. [DOI: 10.1016/j.jconrel.2016.08.041] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 08/22/2016] [Accepted: 08/28/2016] [Indexed: 11/29/2022]
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Huang CH, Takemoto H, Nomoto T, Tomoda K, Matsui M, Nishiyama N. Utility of the 2-Nitrobenzenesulfonamide Group as a Chemical Linker for Enhanced Extracellular Stability and Cytosolic Cleavage in siRNA-Conjugated Polymer Systems. ChemMedChem 2016; 12:19-22. [DOI: 10.1002/cmdc.201600488] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 10/26/2016] [Indexed: 12/20/2022]
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Che Harun NF, Takemoto H, Nomoto T, Tomoda K, Matsui M, Nishiyama N. Artificial Control of Gene Silencing Activity Based on siRNA Conjugation with Polymeric Molecule Having Coil-Globule Transition Behavior. Bioconjug Chem 2016; 27:1961-4. [PMID: 27506383 DOI: 10.1021/acs.bioconjchem.6b00322] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A new strategy for controlling gene silencing activity of siRNA in the cell was developed in the present study. siRNA was linearly conjugated with PNIPAAm, where coil-globule transition of the conjugated PNIPAAm allows thermoresponsive exposure of the vicinal siRNA molecule; a coil form of PNIPAAm (T < LCST) inhibits siRNA interaction with gene silencing-related proteins due to the steric hindrance effect, while a globule form of PNIPAAm (T > LCST) allows a ready access of siRNA to gene silencing pathway. As a result, at T > LCST, PNIPAAm-siRNA elicited effective association of siRNA with a gene silencing-related protein of Ago2, while siRNA recruitment into the gene silencing pathway was significantly suppressed at T < LCST. Ultimately, gene silencing efficacy of PNIPAAm-siRNA was close to unconjugated siRNA at T > LCST (∼80%), while it was dramatically decreased to ∼20% at T < LCST, suggesting that coil-globule transition of the conjugated polymer can control the bioactivity of the vicinal siRNA molecule.
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Fukuda K, Takemoto H, Ikeda A. Analytical approach to the temporal changes in NIRS signals to separate hemodynamic change from brain activity. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2016:1393-1396. [PMID: 28268586 DOI: 10.1109/embc.2016.7590968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In brain function measurements by near-infrared spectroscopy (NIRS), we focus on the temporal changes in the oxygenated and deoxygenated hemoglobin concentrations and propose an analytical approach to the temporal changes of the hemoglobin concentrations' cross-correlation coefficient in the brain functional signals. The cross-correlation coefficient between the oxygenated and deoxygenated hemoglobin concentrations shows negative values for brain activity and positive values for hemodynamic changes. Experiments with a 16-channel functional NIRS system show that our proposed approach clarifies the interpretation of the measured NIRS signals and it can be used to estimate the influence of hemodynamic change on brain activity.
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Urata Y, Abe S, Devers B, Nakamura Y, Takemoto H, Furukawa KI. THU0072 A Novel Dose Reduction Therapy Using Biological Disease-Modifying Anti-Rheumatic Drugs To Target Matrix Metalloproteinase 3 Normalization Together with A Simplified Disease Activity Index ≤3.3 Yields Effects Non-Inferior To Standard Care in Rheumatoid Arthritis with Regards Maintaining Remission. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Iwamoto S, Hazama S, Kin H, Takemoto H, Kobayashi K, Takahashi Y, Kobayashi M, Maeda H, Nagata N, Oba K, Sakamoto J, Mishima H. P-157 A phase II study of XELOX and Cetuximab (Erbitux) as first-line therapy in patients with KRAS wild-type metastatic colorectal cancer (FLEET2). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Hayashi K, Chaya H, Fukushima S, Watanabe S, Takemoto H, Osada K, Nishiyama N, Miyata K, Kataoka K. Macromol. Rapid Commun. 6/2016. Macromol Rapid Commun 2016. [DOI: 10.1002/marc.201670026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hayashi K, Chaya H, Fukushima S, Watanabe S, Takemoto H, Osada K, Nishiyama N, Miyata K, Kataoka K. Influence of RNA Strand Rigidity on Polyion Complex Formation with Block Catiomers. Macromol Rapid Commun 2016; 37:486-93. [DOI: 10.1002/marc.201500661] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 12/16/2015] [Indexed: 12/29/2022]
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Tangsangasaksri M, Takemoto H, Naito M, Maeda Y, Sueyoshi D, Kim HJ, Miura Y, Ahn J, Azuma R, Nishiyama N, Miyata K, Kataoka K. siRNA-Loaded Polyion Complex Micelle Decorated with Charge-Conversional Polymer Tuned to Undergo Stepwise Response to Intra-Tumoral and Intra-Endosomal pHs for Exerting Enhanced RNAi Efficacy. Biomacromolecules 2015; 17:246-55. [DOI: 10.1021/acs.biomac.5b01334] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Takemoto H, Miyata K, Nishiyama N, Kataoka K. Bioresponsive polymer-based nucleic acid carriers. ADVANCES IN GENETICS 2015; 88:289-323. [PMID: 25409610 DOI: 10.1016/b978-0-12-800148-6.00010-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nucleic acid carriers need to possess multifunctionality for overcoming biological barriers, such as the stable encapsulation of nucleic acids in extracellular milieu, internalization by target cells, controlled intracellular distribution, and release of nucleic acids at the target site of action. To fulfill these stepwise functionalities, "bioresponsive" polymers that can alter their structure responding to site-specific biological signals are highly useful. Notably, pH, redox potential, and enzymatic activities vary along with microenvironments in the body, and thus, the responsiveness to these signals enables to construct nucleic acid carriers with programmed functionalities. This chapter describes the design of bioresponsive polymers that respond to various biological microenvironments for smart nucleic acids delivery.
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Nishimura J, Satoh T, Fukunaga M, Takemoto H, Nakata K, Ide Y, Fukuzaki T, Kudo T, Miyake Y, Yasui M, Morita S, Sakai D, Uemura M, Hata T, Takemasa I, Mizushima T, Ohno Y, Yamamoto H, Sekimoto M, Nezu R, Doki Y, Mori M. O-001 A phase III trial of aprepitant in colorectal cancer patients receiving oxaliplatin-based chemotherapy (SENRI Trial). Ann Oncol 2015. [DOI: 10.1093/annonc/mdv235.01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Okada K, Takemoto H, Yamakami T, Kawata S, Imagita H. Changes in skeletal muscle tension in a rat 6-hydroxydopamin-induced Parkinson's disease model. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.2032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Jain A, Takemoto H, Silver MD, Nagesh SVS, Ionita CN, Bednarek DR, Rudin S. Region-of-interest cone beam computed tomography (ROI CBCT) with a high resolution CMOS detector. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2015; 9412. [PMID: 26877577 DOI: 10.1117/12.2081450] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Cone beam computed tomography (CBCT) systems with rotational gantries that have standard flat panel detectors (FPD) are widely used for the 3D rendering of vascular structures using Feldkamp cone beam reconstruction algorithms. One of the inherent limitations of these systems is limited resolution (<3 lp/mm). There are systems available with higher resolution but their small FOV limits them to small animal imaging only. In this work, we report on region-of-interest (ROI) CBCT with a high resolution CMOS detector (75 μm pixels, 600 μm HR-CsI) mounted with motorized detector changer on a commercial FPD-based C-arm angiography gantry (194 μm pixels, 600 μm HL-CsI). A cylindrical CT phantom and neuro stents were imaged with both detectors. For each detector a total of 209 images were acquired in a rotational protocol. The technique parameters chosen for the FPD by the imaging system were used for the CMOS detector. The anti-scatter grid was removed and the incident scatter was kept the same for both detectors with identical collimator settings. The FPD images were reconstructed for the 10 cm x10 cm FOV and the CMOS images were reconstructed for a 3.84 cm × 3.84 cm FOV. Although the reconstructed images from the CMOS detector demonstrated comparable contrast to the FPD images, the reconstructed 3D images of the neuro stent clearly showed that the CMOS detector improved delineation of smaller objects such as the stent struts (~70 μm) compared to the FPD. Further development and the potential for substantial clinical impact are suggested.
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Gao H, Takemoto H, Chen Q, Naito M, Uchida H, Liu X, Miyata K, Kataoka K. Regulated protonation of polyaspartamide derivatives bearing repeated aminoethylene side chains for efficient intracellular siRNA delivery with minimal cytotoxicity. Chem Commun (Camb) 2015; 51:3158-61. [DOI: 10.1039/c4cc09859e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The protonation behavior of aminoethylene units in polyaspartamide side-chains was modulated for improving the delivery efficiency of siRNA-loaded polyion complexes.
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Kim HJ, Takemoto H, Yi Y, Zheng M, Maeda Y, Chaya H, Hayashi K, Mi P, Pittella F, Christie RJ, Toh K, Matsumoto Y, Nishiyama N, Miyata K, Kataoka K. Precise engineering of siRNA delivery vehicles to tumors using polyion complexes and gold nanoparticles. ACS NANO 2014; 8:8979-8991. [PMID: 25133608 DOI: 10.1021/nn502125h] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
For systemic delivery of siRNA to solid tumors, a size-regulated and reversibly stabilized nanoarchitecture was constructed by using a 20 kDa siRNA-loaded unimer polyion complex (uPIC) and 20 nm gold nanoparticle (AuNP). The uPIC was selectively prepared by charge-matched polyionic complexation of a poly(ethylene glycol)-b-poly(L-lysine) (PEG-PLL) copolymer bearing ∼40 positive charges (and thiol group at the ω-end) with a single siRNA bearing 40 negative charges. The thiol group at the ω-end of PEG-PLL further enabled successful conjugation of the uPICs onto the single AuNP through coordinate bonding, generating a nanoarchitecture (uPIC-AuNP) with a size of 38 nm and a narrow size distribution. In contrast, mixing thiolated PEG-PLLs and AuNPs produced a large aggregate in the absence of siRNA, suggesting the essential role of the preformed uPIC in the formation of nanoarchitecture. The smart uPIC-AuNPs were stable in serum-containing media and more resistant against heparin-induced counter polyanion exchange, compared to uPICs alone. On the other hand, the treatment of uPIC-AuNPs with an intracellular concentration of glutathione substantially compromised their stability and triggered the release of siRNA, demonstrating the reversible stability of these nanoarchitectures relative to thiol exchange and negatively charged AuNP surface. The uPIC-AuNPs efficiently delivered siRNA into cultured cancer cells, facilitating significant sequence-specific gene silencing without cytotoxicity. Systemically administered uPIC-AuNPs showed appreciably longer blood circulation time compared to controls, i.e., bare AuNPs and uPICs, indicating that the conjugation of uPICs onto AuNP was crucial for enhancing blood circulation time. Finally, the uPIC-AuNPs efficiently accumulated in a subcutaneously inoculated luciferase-expressing cervical cancer (HeLa-Luc) model and achieved significant luciferase gene silencing in the tumor tissue. These results demonstrate the strong potential of uPIC-AuNP nanoarchitectures for systemic siRNA delivery to solid tumors.
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Mizushima T, Ide Y, Murata K, Ohashi I, Yasumasa K, Fukunaga M, Takemoto H, Tamagawa H, Kato T, Ikenaga M, Hasegawa J, Hata T, Takemasa I, Ikeda M, Satoh T, Yamamoto H, Sekimoto M, Nezu R, Doki Y, Mori M. Phase Ii Study of Combined Chemotherapy with 5-Week Cycles of S-1 and Cpt-11 (Iris) Plus Bevacizumab in Patients with Metastatic Colon Cancer. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu333.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Urata Y, Furukawa KI, Takemoto H. THU0303 Influential Factor of Hepatitis B Virus Reactivation in Collagen Disease. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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