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Udagawa T, Tanaka H, Kuwahata K, Tachikawa M. Location of the Shared Proton in Proton-Bound Dimer Compound of Hydrogen Sulfate and Formate: Path Integral Molecular Dynamics Study. J Phys Chem A 2024; 128:2103-2110. [PMID: 38414141 DOI: 10.1021/acs.jpca.4c00239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The structure of the proton-bound dimer compound of hydrogen sulfate and formate has been studied by considering nuclear quantum effects (NQEs) using the path integral molecular dynamics method. This study unveiled the location of the shared proton and answered the following question: "Is the shared proton localized on either an anion or located around the center of two anions?" We have elucidated that the shared proton is distributed in the region beyond the transition state due to the NQEs, even though the shared proton did not completely overcome the transition state for the proton shuttle.
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Affiliation(s)
- Taro Udagawa
- Department of Chemistry and Biomolecular Science, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
| | - Hikaru Tanaka
- Department of Chemistry and Biomolecular Science, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
| | - Kazuaki Kuwahata
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
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Sone K, Sakamaki Y, Hirose S, Inagaki M, Tachikawa M, Yoshino D, Funamoto K. Hypoxia suppresses glucose-induced increases in collective cell migration in vascular endothelial cell monolayers. Sci Rep 2024; 14:5164. [PMID: 38431674 PMCID: PMC10908842 DOI: 10.1038/s41598-024-55706-1] [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: 11/16/2023] [Accepted: 02/27/2024] [Indexed: 03/05/2024] Open
Abstract
Blood glucose levels fluctuate during daily life, and the oxygen concentration is low compared to the atmosphere. Vascular endothelial cells (ECs) maintain vascular homeostasis by sensing changes in glucose and oxygen concentrations, resulting in collective migration. However, the behaviors of ECs in response to high-glucose and hypoxic environments and the underlying mechanisms remain unclear. In this study, we investigated the collective migration of ECs simultaneously stimulated by changes in glucose and oxygen concentrations. Cell migration in EC monolayer formed inside the media channels of microfluidic devices was observed while varying the glucose and oxygen concentrations. The cell migration increased with increasing glucose concentration under normoxic condition but decreased under hypoxic condition, even in the presence of high glucose levels. In addition, inhibition of mitochondrial function reduced the cell migration regardless of glucose and oxygen concentrations. Thus, oxygen had a greater impact on cell migration than glucose, and aerobic energy production in mitochondria plays an important mechanistic role. These results provide new insights regarding vascular homeostasis relative to glucose and oxygen concentration changes.
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Affiliation(s)
- Kazuki Sone
- Graduate School of Biomedical Engineering, Tohoku University, 6-6-12 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
| | - Yuka Sakamaki
- Graduate School of Pharmaceutical Sciences, Tokushima University, 1-78-1 Sho-machi, Tokushima, Tokushima, 770-8505, Japan
| | - Satomi Hirose
- Graduate School of Biomedical Engineering, Tohoku University, 6-6-12 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
| | - Mai Inagaki
- Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Sho-machi, Tokushima, Tokushima, 770-8505, Japan
| | - Masanori Tachikawa
- Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Sho-machi, Tokushima, Tokushima, 770-8505, Japan
| | - Daisuke Yoshino
- Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Kenichi Funamoto
- Graduate School of Biomedical Engineering, Tohoku University, 6-6-12 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan.
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan.
- Graduate School of Engineering, Tohoku University, 6-6-1 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8597, Japan.
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Jomura R, Sawada M, Tega Y, Akanuma SI, Tachikawa M, Hosoya KI. Molecular Mechanism of SLC6A8 Dysfunction with c.1699T > C (p.S567P) Mutation in Cerebral Creatine Deficiency Syndromes. Biol Pharm Bull 2024; 47:187-191. [PMID: 38233148 DOI: 10.1248/bpb.b23-00586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Cerebral creatine deficiency syndromes (CCDS) are neurodevelopmental disorders caused by a decrease in creatine levels in the central nervous system (CNS) due to functional mutations in creatine synthetic enzymes or creatine transporter (CRT/SLC6A8). Although SLC6A8 mutations have been reported to be the most frequent cause of CCDS, sufficient treatment for patients with CCDS harboring SLC6A8 mutations has not yet been achieved. This study aimed to elucidate the molecular mechanism of SLC6A8 dysfunction caused by the c. 1699T > C missense mutation, which is thought to induce dysfunction through an unidentified mechanism. A study on SLC6A8-expressing oocytes showed that the c.1699T > C mutation decreased creatine uptake compared to that in wild-type (WT) oocytes. In addition, a kinetics study of creatine uptake revealed that the c.1699T > C mutation reduced the maximum uptake rate but not Michaelis-Menten constant. In contrast, the c.1699T > C mutation did not attenuate SLC6A8 protein levels or alter its cellular localization. Based on the SLC6A8 structure in the AlphaFold protein structure database, it is possible that the c.1699T > C mutation alters the interaction between the S567 and Y143 residues of SLC6A8, leading to decreased creatine transport function. These findings contribute to the understanding of the pathology of CCDS and to the development of strategies for CCDS treatment.
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Affiliation(s)
- Ryuta Jomura
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
| | - Masaru Sawada
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
| | - Yuma Tega
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
| | - Shin-Ichi Akanuma
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
| | | | - Ken-Ichi Hosoya
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
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Kuwahata K, Ito S, Tachikawa M. A path integral molecular dynamics study on the muoniated xanthene-thione molecule. J Chem Phys 2023; 159:104301. [PMID: 37681697 DOI: 10.1063/5.0159207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/16/2023] [Indexed: 09/09/2023] Open
Abstract
A positive Mu is a useful tool for investigating the spin density of radical species. The theoretical estimation of its behavior in a molecule requires the inclusion of a quantum effect due to the small mass of muonium. Herein, we performed ab initio a path integral molecular dynamics (PIMD) simulation, which accurately included a multi-dimensional quantum effect, for muoniated 9H-xanthene-9-thione (μXT). Our results showed that the quantum effect significantly increased the hyperfine coupling constant (HFCC) value of μXT, which qualitatively improved the calculated HFCC value, compared to the experimental one. In the PIMD simulation, the bond length between muonium and sulfur in μXT is longer than that between hydrogen and sulfur in a hydrogenated 9H-xanthene-9-thione (HXT), leading to a spin density transfer from XT (9H-xanthene-9-thione) to muonium due to neutral dissociations. Additionally, we found that the S-Mu bond in μXT prefers a structure perpendicular to the molecular plane, where the interaction between Mu and the singly occupied molecular orbital of μXT is the strongest. These structural changes resulted in a larger HFCC value in the PIMD simulation of μXT.
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Affiliation(s)
- Kazuaki Kuwahata
- Graduate School of Nanobioscience, Yokohama City University, Yokohama, Japan
| | - Shigekazu Ito
- School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Masanori Tachikawa
- Graduate School of Nanobioscience, Yokohama City University, Yokohama, Japan
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Naito T, Takagi M, Tachikawa M, Yamashita K, Shimazaki T. Theoretical Study of the Molecular Passivation Effect of Lewis Base/Acid on Lead-Free Tin Perovskite Surface Defects. J Phys Chem Lett 2023:6695-6701. [PMID: 37466615 DOI: 10.1021/acs.jpclett.3c01450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Extensive research has been recently conducted to improve the power conversion efficiency (PCE) of perovskite solar cells. However, the charge carriers are easily trapped by the defect sites located at the interface between the perovskite layer and the electrode, which decreases the PCE. To reduce such defect sites, the passivation technique is frequently employed to coat small molecules on the perovskite surface during the manufacturing process. To clarify the passivation mechanism from a molecular viewpoint, we performed density functional theory calculations to target Pb-free Sn perovskites (CH3NH3SnI3). We investigated the passivation effect of Lewis base/acid molecules, such as ethylene diamine (EDA) and iodopentafluorobenzene (IPFB), and discussed behaviors of the defect levels within the bandgap as they have strong negative impacts on the PCE. The adsorption of EDA/IPFB on the Sn perovskite surface can remove the defect levels from the bandgap. Furthermore, we discuss the importance of interactions with molecular orbitals.
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Affiliation(s)
- Takumi Naito
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-Ku, Yokohama 236-0027, Kanagawa, Japan
| | - Makito Takagi
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-Ku, Yokohama 236-0027, Kanagawa, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-Ku, Yokohama 236-0027, Kanagawa, Japan
| | - Koichi Yamashita
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-Ku, Yokohama 236-0027, Kanagawa, Japan
| | - Tomomi Shimazaki
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-Ku, Yokohama 236-0027, Kanagawa, Japan
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Udagawa T, Yabushita H, Tanaka H, Kuwahata K, Tachikawa M. Nuclear quantum and H/D isotope effects on intramolecular hydrogen bond in curcumin. Phys Chem Chem Phys 2023. [PMID: 37254714 DOI: 10.1039/d3cp01821k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Curcumin and its derivatives possess intramolecular low-barrier hydrogen bonds for intramolecular proton transfer. The π-delocalization in the OCCCO framework of the hydrogen bond in these compounds is reorganized concomitantly with the proton transfer. To characterize the hydrogen bond and π-delocalization, we performed path integral molecular dynamics simulations, revealing that although the proton migration and reorganization of the π-delocalized structure showed a positive correlation, the correlation was weak.
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Affiliation(s)
- Taro Udagawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan.
| | - Hinata Yabushita
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan.
| | - Hikaru Tanaka
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan.
| | - Kazuaki Kuwahata
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
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Ito S, Yoshida D, Kita Y, Shimazaki T, Tachikawa M. Stability and bonding nature of positronic lithium molecular dianion. J Chem Phys 2023; 158:2893140. [PMID: 37232435 DOI: 10.1063/5.0150246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 04/17/2023] [Indexed: 05/27/2023] Open
Abstract
We studied the stability of a system consisting of a positron (e+) and two lithium anions, [Li-; e+; Li-], using first-principles quantum Monte Carlo calculations combined with the multi-component molecular orbital method. While diatomic lithium molecular dianions Li22- are unstable, we found that its positronic complex can form a bound state with respect to the lowest energy decay into the dissociation channel Li2- and a positronium (Ps). The [Li-; e+; Li-] system has the minimum energy at the internuclear distance of ∼3 Å, which is close to the equilibrium internuclear distance of Li2-. At the minimum energy structure both an excess electron and a positron are delocalized as orbiting around the Li2- molecular anion core. A dominant feature of such a positron bonding structure is described as the Ps fraction bound to Li2-, unlike the covalent positron bonding scheme for the electronically isovalent [H-; e+; H-] complex.
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Affiliation(s)
- Shumpei Ito
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Daisuke Yoshida
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Hirosawa 2-1, Wako 351-0198, Japan
| | - Yukiumi Kita
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Tomomi Shimazaki
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
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Funaki S, Kawawaki T, Okada T, Takemae K, Hossain S, Niihori Y, Naito T, Takagi M, Shimazaki T, Kikkawa S, Yamazoe S, Tachikawa M, Negishi Y. Improved activity for the oxygen evolution reaction using a tiara-like thiolate-protected nickel nanocluster. Nanoscale 2023; 15:5201-5208. [PMID: 36789780 DOI: 10.1039/d2nr06952k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Practical electrochemical water splitting and carbon-dioxide reduction are desirable for a sustainable energy society. In particular, facilitating the oxygen evolution reaction (OER, the reaction at the anode) will increase the efficiency of these reactions. Nickel (Ni) compounds are excellent OER catalysts under basic conditions, and atomically precise Ni clusters have been actively studied to understand their complex reaction mechanisms. In this study, we evaluated the geometric/electronic structure of tiara-like metal nanoclusters [Nin(PET)2n; n = 4, 5, 6, where PET refers to phenylethanethiolate] with the same SR ligand. The geometric structure of Ni5(SR)10 was determined for the first time using single-crystal X-ray diffraction. Additionally, combined electrochemical measurements and X-ray absorption fine structure measurements revealed that Ni5(SR)10 easily forms an OER intermediate and therefore exhibits a high specific activity.
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Affiliation(s)
- Sota Funaki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Tokuhisa Kawawaki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
- Research Institute for Science and Technology, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Tomoshige Okada
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Kana Takemae
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Sakiat Hossain
- Research Institute for Science and Technology, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yoshiki Niihori
- Research Institute for Science and Technology, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Takumi Naito
- Graduate School of NanoBioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Makito Takagi
- Graduate School of NanoBioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Tomomi Shimazaki
- Graduate School of NanoBioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Soichi Kikkawa
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji-shi, Tokyo 192-0397, Japan
| | - Seiji Yamazoe
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji-shi, Tokyo 192-0397, Japan
| | - Masanori Tachikawa
- Graduate School of NanoBioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Yuichi Negishi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
- Research Institute for Science and Technology, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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Udagawa T, Tanaka H, Hirano T, Kuwahata K, Tachikawa M, Baba M, Nagashima U. Direct Elucidation of the Vibrationally Averaged Structure of Benzene: A Path Integral Molecular Dynamics Study. J Phys Chem A 2023; 127:894-901. [PMID: 36683277 DOI: 10.1021/acs.jpca.2c07197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Path integral molecular dynamics (PIMD) simulations for C6H6, C6D6, and C6T6 have been carried out to directly estimate the distribution of projected C-H(D,T) bond lengths onto the principal axis plane. The average values of raw C-H(D,T) bond lengths obtained from PIMD simulations are in the order of ⟨RC-H⟩ > ⟨RC-D⟩ > ⟨RC-T⟩ due to the anharmonicity of the potential energy curve. However, the projected C-H(D,T) bond lengths are almost the same as those reported by Hirano et al. [J. Mol. Struct. 2021, 1243, 130537]. Our PIMD simulations directly and strongly support the explanation by Hirano et al. for the experimental observations that almost the same projected C-H(D) bond lengths are found for C6H6 and C6D6. The PIMD simulations also predicted the same projected bond lengths for C6T6 as those of C6H(D)6. In addition to the previous local mode analysis, the present PIMD simulations predicted, for benzene isotopologues, that the vibrationally averaged structure is planar but non-flat.
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Affiliation(s)
- Taro Udagawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu501-1193, Japan
| | - Hikaru Tanaka
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu501-1193, Japan
| | - Tsuneo Hirano
- Department of Chemistry, Faculty of Science, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo112-8610, Japan
| | - Kazuaki Kuwahata
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Japan
| | - Masanori Tachikawa
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Japan
| | - Masaaki Baba
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Japan.,Molecular Photoscience Research Center, Kobe University, Nada-ku, Kobe657-8501, Japan
| | - Umpei Nagashima
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Japan
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Murata M, Koide T, Kobayashi O, Hiraoka S, Shimazaki T, Tachikawa M. Molecular Dynamics Study on the Structure-Property Relationship of Self-Assembled Gear-Shaped Amphiphile Molecules with/without Methyl Groups. J Phys Chem B 2023; 127:328-334. [PMID: 36542848 DOI: 10.1021/acs.jpcb.2c07444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Gaining insight into the encapsulation mechanism is important for controlling the encapsulation rate toward the self-assembly of gear-shaped amphiphile molecules (GSAs). To this aim, we conducted molecular dynamics (MD) simulations for three different hexameric nanocubes (1612+, 2612+, and 3612+) of GSAs (12+, 22+, and 32+, respectively) to elucidate the quantitative structure-property relationship between the stability of the nanocubes and the rate of encapsulation of a guest molecule. The 12+, 22+, and 32+ monomers differ from each other in the number of methyl groups, having three, zero, and two methyl groups, respectively. The 3612+ hexamer has methyl groups only on the equatorial region. In the cases of the simulations of 1612+ and 3612+, the cubic structures are maintained due to a tight triple-π stacking around the equator region. Meanwhile, 2612+ deforms easily due to the occurrence of a large fluctuation. These results indicate that the methyl groups on the equator are crucial to stabilize the nanocubes. The encapsulation of an iodide ion as a guest molecule is revealed to occur through the pole region via a gap that is easily formed in the nanocubes without methyl groups on the poles. Our study clearly suggests that self-assembled nanocubes can be designed to attain a specific stability and encapsulation efficiency simultaneously.
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Affiliation(s)
- Moe Murata
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Kanagawa, Japan
| | - Takuya Koide
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Kanagawa, Japan
| | - Osamu Kobayashi
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Kanagawa, Japan
| | - Shuichi Hiraoka
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo153-8902Japan
| | - Tomomi Shimazaki
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Kanagawa, Japan
| | - Masanori Tachikawa
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama236-0027, Kanagawa, Japan
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Naito T, Kita Y, Shimazaki T, Tachikawa M. Decomposition analysis on the excitation behaviors of thiazolothiazole (TTz)-based dyes via the time-dependent dielectric density functional theory approach. RSC Adv 2022; 12:34685-34693. [PMID: 36545599 PMCID: PMC9717578 DOI: 10.1039/d2ra06454e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/22/2022] [Indexed: 12/05/2022] Open
Abstract
Thiazolothiazole (TTz)-based materials have been attracting much attention because of their widespread applications. In this paper, we discuss the excited electronic behaviors of asymmetric TTz dyes in solvents based on the time-dependent dielectric density functional theory method. Based on dipole moment and charge distribution (population) analyses, we discuss large intramolecular electron transfers, which are triggered by photon excitations, toward the acceptor part of dyes. In addition, we explore the contributions of geometrical changes and solvent reorientations (reorganizations) to the solvatofluorochromic phenomena based on a decomposition technique. The decomposition analysis shows that the solvent reorientation effect mainly contributes to changes in the fluorescent spectra in response to solvents.
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Affiliation(s)
- Takumi Naito
- Graduate School of Nanobioscience, Yokohama City University22-2 Seto, Kanazawa-kuYokohama 236-0026Japan
| | - Yukiumi Kita
- Graduate School of Nanobioscience, Yokohama City University22-2 Seto, Kanazawa-kuYokohama 236-0026Japan
| | - Tomomi Shimazaki
- Graduate School of Nanobioscience, Yokohama City University22-2 Seto, Kanazawa-kuYokohama 236-0026Japan
| | - Masanori Tachikawa
- Graduate School of Nanobioscience, Yokohama City University22-2 Seto, Kanazawa-kuYokohama 236-0026Japan
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12
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Shimazaki T, Tachikawa M. Theoretical study of the effect of nonlocal short-range exchange on calculations of molecular excitation energies in the dielectric screened-exchange method. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139740] [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: 11/26/2022]
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Udagawa T, Kinoshita A, Kuwahata K, Tachikawa M. A path integral molecular dynamics study on the NH 4+ rotation in NH 4+⋯XH 2 (X = Be or Mg) dihydrogen bond systems. Phys Chem Chem Phys 2022; 24:17295-17302. [PMID: 35815576 DOI: 10.1039/d2cp01999j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nuclear quantum effects (NQEs) in dihydrogen bond (DHB) complexes, i.e., NH4+⋯BeH2 and NH4+⋯MgH2, have been investigated using multicomponent quantum mechanics (MC_QM) calculations and path integral molecular dynamics (PIMD) simulation. The MC_QM method considers the NQEs, whereas PIMD considers both the NQEs and the thermal effects. The linear C3v structure is maintained in the optimized structures obtained by the static MP2 and MC_MP2 calculations, whereas the average structures obtained by the PIMD simulation are nonlinear. The strong DHB interaction in NH4+⋯MgH2 suppresses the fluctuation in the Hδ+NMg and Hδ-MgN angles, and hence, the NH4+ rotation did not occur in the simulation of NH4+⋯MgH2. The analysis of the radius of gyration revealed that the nuclear quantum fluctuation in the perpendicular direction is suppressed by the formation of the DHB complex, whereas that in the parallel direction is slightly enhanced in both the Hδ+ and Hδ- nuclei.
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Affiliation(s)
- Taro Udagawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu 501-1193, Japan.
| | - Amane Kinoshita
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu 501-1193, Japan.
| | - Kazuaki Kuwahata
- Graduate School of NanobioScience, Yokohama City University, Yokohama 236-0027, Japan.
| | - Masanori Tachikawa
- Graduate School of NanobioScience, Yokohama City University, Yokohama 236-0027, Japan.
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14
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Wakahara T, Nagaoka K, Hirata C, Miyazawa K, Fujii K, Matsushita Y, Ito O, Takagi M, Shimazaki T, Tachikawa M, Wada Y, Yagyu S, Liu Y, Nakajima Y, Tsukagoshi K. Fullerene C 70/porphyrin hybrid nanoarchitectures: single-cocrystal nanoribbons with ambipolar charge transport properties. RSC Adv 2022; 12:19548-19553. [PMID: 35865602 PMCID: PMC9258400 DOI: 10.1039/d2ra02669d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 06/27/2022] [Indexed: 11/21/2022] Open
Abstract
In recent years, supramolecular cocrystals containing organic donors and acceptors have been explored as active components in organic field-effect transistors (FETs). Herein, we report the synthesis of novel single-cocrystal nanoribbons with ambipolar charge transport characteristics from C70 and 5,10,15,20-tetrakis(3,5-dimethoxyphenyl)porphyrin (3,5-TPP) in a 3 : 2 ratio. The C70/3,5-TPP nanoribbons exhibited a new strong absorption band in the near-infrared region, indicating the presence of charge-transfer interactions between C70 and 3,5-TPP in the cocrystals. We elucidated the mechanism of the charge-transport properties of the nanoribbons using photoemission yield spectroscopy in air and theoretical calculations. A strong interaction between porphyrins in the one-dimensional porphyrin chains formed in C70/3,5-TPP nanoribbons, which was confirmed by single-crystal X-ray diffraction, plays a crucial role in their hole transport properties. The one-dimensional porphyrin chains in the cocrystal play a very important role in the hole transport properties of C70/porphyrin nanoribbons.![]()
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Affiliation(s)
- Takatsugu Wakahara
- Research Center for Functional Materials, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Kahori Nagaoka
- Research Center for Functional Materials, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Chika Hirata
- Research Center for Functional Materials, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Kun'ichi Miyazawa
- Department of Chemical Sciences and Technology, Graduate School of Chemical Sciences and Technology, Tokyo University of Science 6-3-1 Niijuku, Katsushika-ku Tokyo 125-8585 Japan
| | - Kazuko Fujii
- Research Center for Functional Materials, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Yoshitaka Matsushita
- Research Network and Facility Services Division, National Institute for Materials Science 1-2-1 Sengen Tsukuba Ibaraki 305-0047 Japan
| | - Osamu Ito
- Research Center for Functional Materials, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Makito Takagi
- Quantum Chemistry Division, Graduate School of NanoBioScience, Yokohama City University 22-2 Seto, Kanazawa-ku Yokohama Kanagawa 236-0027 Japan
| | - Tomomi Shimazaki
- Quantum Chemistry Division, Graduate School of NanoBioScience, Yokohama City University 22-2 Seto, Kanazawa-ku Yokohama Kanagawa 236-0027 Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Graduate School of NanoBioScience, Yokohama City University 22-2 Seto, Kanazawa-ku Yokohama Kanagawa 236-0027 Japan
| | - Yoshiki Wada
- Research Center for Functional Materials, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Shinjiro Yagyu
- Research Center for Functional Materials, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Yubin Liu
- RIKEN KEIKI Co., Ltd 2-7-6, Azusawa Itabashi-ku Tokyo 174-8744 Japan
| | | | - Kazuhito Tsukagoshi
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
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15
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Jomura R, Akanuma SI, Kubo Y, Tachikawa M, Hosoya KI. Processing mechanism of guanidinoacetate in choroid plexus epithelial cells: conversion of guanidinoacetate to creatine via guanidinoacetate N-methyltransferase and monocarboxylate transporter 12-mediated creatine release into the CSF. Fluids Barriers CNS 2022; 19:42. [PMID: 35658878 PMCID: PMC9164341 DOI: 10.1186/s12987-022-00328-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/05/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Guanidinoacetate (GAA) induces epileptogenesis and neurotoxicity in the brain. As epileptic animal models have been reported to show elevated cerebral GAA levels, the processing mechanism of GAA in the brain is important for maintaining brain homeostasis. We have revealed that GAA in the cerebrospinal fluid (CSF) is removed by incorporation into the choroid plexus epithelial cells (CPxEpic), which form the blood-CSF barrier (BCSFB). However, the processing mechanism of GAA incorporated into CPxEpic remains unknown. We have reported that monocarboxylate transporter 12 (MCT12) functions as an efflux transporter of GAA and creatine, a metabolite of GAA, in the kidneys and liver. Therefore, we aimed to clarify the role of MCT12 in GAA dynamics in CPxEpic. METHODS Protein expression and localization in CPxEpic were evaluated using immunohistochemistry. Metabolic analysis was performed using high-performance liquid chromatography (HPLC) 24 h after the addition of [14C]GAA to TR-CSFB3 cells, which are conditionally immortalized rat CPxEpic. The efflux transport of [14C]creatine was evaluated in TR-CSFB3 cells after transfection with MCT12 small interfering RNA (siRNA). The CSF-to-brain parenchyma transfer of creatine was measured after intracerebroventricular injection in rats. RESULTS Immunohistochemical staining revealed that MCT12-derived signals merged with those of the marker protein at the apical membrane of CPxEpic, suggesting that MCT12 is localized on the apical membrane of CPxEpic. The expression levels of guanidinoacetate N-methyltransferase (GAMT), which catalyzes the conversion of GAA to creatine, in TR-CSFB3 cells was also indicated, and GAA was considered to be metabolized to creatine after influx transport into CPxEpic, after which creatine was released into the CSF. Creatine release from TR-CSFB3 cells decreased following MCT12 knockdown. The contribution ratio of MCT12 to the release of creatine was more than 50%. The clearance of CSF-to-brain parenchyma transfer of creatine was 4.65 µL/(min·g brain), suggesting that biosynthesized creatine in CPxEpic is released into the CSF and supplied to the brain parenchyma. CONCLUSIONS In CPxEpic, GAA is metabolized to creatine via GAMT. Biosynthesized creatine is then released into the CSF via MCT12 and supplied to the brain parenchyma.
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Affiliation(s)
- Ryuta Jomura
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Shin-Ichi Akanuma
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Yoshiyuki Kubo
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Masanori Tachikawa
- Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Shomachi, Tokushima, 770-8505, Japan
| | - Ken-Ichi Hosoya
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan.
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16
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Inagaki M, Tachikawa M. Transport Characteristics of Placenta-Derived Extracellular Vesicles and Their Relevance to Placenta-to-Maternal Tissue Communication. Chem Pharm Bull (Tokyo) 2022; 70:324-329. [DOI: 10.1248/cpb.c22-00072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Mai Inagaki
- Graduate School of Biomedical Sciences, Tokushima University
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17
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Ishida T, Kogure K, Tachikawa M, Baba K. Foreword. Chem Pharm Bull (Tokyo) 2022; 70:309. [DOI: 10.1248/cpb.c22-ctf7005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Tatsuhiro Ishida
- Department of Pharmacokinetics and Biopharmaceutics, Graduate School of Biomedical Sciences, Tokushima University
| | - Kentaro Kogure
- Department of Pharmaceutical Health Chemistry, Graduate School of Biomedical Sciences, Tokushima University
| | - Masanori Tachikawa
- Department of Theoretical Chemistry for Drug Discovery, Graduate School of Biomedical Sciences, Tokushima University
| | - Kazuhiko Baba
- Formulation Research Laboratory, CMC Division, Taiho Pharmaceutical Co., Ltd
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18
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Tanaka H, Kuwahata K, Tachikawa M, Udagawa T. Low-Barrier Hydrogen Bond in Fujikurin A-D: A Computational Study. ACS Omega 2022; 7:14244-14251. [PMID: 35559150 PMCID: PMC9089377 DOI: 10.1021/acsomega.2c00857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 04/05/2022] [Indexed: 06/15/2023]
Abstract
The compounds Fujikurin A, B, and D, recently isolated from Fusarium fujikuroi, possess intramolecular low-barrier hydrogen bonds (LBHBs), which are hydrogen bonds with a very low-energy barrier for proton transfer. The isolated compounds have a hydrogen-bonded proton that appears to rapidly switch between two equilibrium states via a transition state (TS). To understand the characteristics of these intramolecular LBHBs in detail, we performed path integral molecular dynamics (PIMD) simulations, which can consider nuclear quantum effects (NQEs) under a finite temperature. The PIMD simulations predicted that the NQE completely washed out the energy barrier for the proton transfer reaction. Consequently, a single-well shape emerged in the results, along with the effective free-energy potential surface for the hydrogen-bonded proton distribution. Thus, we conclude that the hydrogen-bonded proton in Fujikurin does not in fact transfer between two equilibrium structures but widely delocalizes around the global minimum structure involving the TS region.
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Affiliation(s)
- Hikaru Tanaka
- Department
of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Kazuaki Kuwahata
- Graduate
School of NanobioScience, Yokohama City
University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Graduate
School of NanobioScience, Yokohama City
University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Taro Udagawa
- Department
of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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19
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Shimazaki T, Tachikawa M. Collaborative Approach between Explainable Artificial Intelligence and Simplified Chemical Interactions to Explore Active Ligands for Cyclin-Dependent Kinase 2. ACS Omega 2022; 7:10372-10381. [PMID: 35382271 PMCID: PMC8973106 DOI: 10.1021/acsomega.1c06976] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/09/2022] [Indexed: 05/13/2023]
Abstract
To improve virtual screening for drug discovery, we present a collaborative approach between explainable artificial intelligence (AI) and simplified chemical interaction scores to efficiently search for active ligands bound to the target receptor. In particular, we focus on cyclin-dependent kinase 2 (CDK2), which is well known as a cancer target protein. Docking simulation alone is insufficient to distinguish active ligands from decoy molecules. To identify active ligands, in this paper, machine learning is employed together with scoring functions that simplify the screened Coulomb and Lennard-Jones interactions between the ligands and residues of the target receptor. We demonstrate that these simplified interaction scores can significantly improve the classification ability of machine learning models. We also demonstrate that explainable AI together with the simplified scoring method can highlight the important residues of CDK2 for recognizing active ligands.
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Affiliation(s)
- Tomomi Shimazaki
- Graduate
School of Nanobioscience, Yokohama City
University, 22-2 Seto, Yokohama, Kanagawa 236-0027, Japan
| | - Masanori Tachikawa
- Graduate
School of Data Science, Yokohama City University, 22-2, Seto, Yokohama, Kanagawa 236-0027, Japan
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20
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Ishii K, Shimazaki T, Tachikawa M, Kita Y. Theoretical Study of the Isotope and Homologue Effects on Nuclear Magnetic Shielding in Water and Hydrogen Sulfide Molecules. CHEM LETT 2022. [DOI: 10.1246/cl.210760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kiriko Ishii
- Quantum Chemistry Division, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Tomomi Shimazaki
- Quantum Chemistry Division, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Yukiumi Kita
- Quantum Chemistry Division, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
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21
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Jomura R, Akanuma SI, Tachikawa M, Hosoya KI. SLC6A and SLC16A family of transporters: Contribution to transport of creatine and creatine precursors in creatine biosynthesis and distribution. Biochim Biophys Acta Biomembr 2022; 1864:183840. [PMID: 34921896 DOI: 10.1016/j.bbamem.2021.183840] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 11/16/2022]
Abstract
Creatine (Cr) is needed to maintain high energy levels in cells. Since Cr plays reportedly a critical role in neurodevelopment and the immune system, Cr dynamics should be strictly regulated to control these physiological events. This review focuses on the role of transporters that recognize Cr and/or Cr precursors. Our previous studies revealed physiological roles of SLC6A and SLC16A family transporters in Cr dynamics. Creatine transporter (CRT/SLC6A8) contributes to the influx transport of Cr in Cr distribution. γ-Aminobutyric acid transporter 2 (GAT2/SLC6A13) mediates incorporation of guanidinoacetate (GAA), a Cr precursor, in the process of Cr biosynthesis. Monocarboxylate transporter 12 (MCT12/SLC16A12) functions as an efflux transporter for Cr and GAA, and contributes to the process of Cr biosynthesis. Accordingly, the SLC6A and SLC16A family of transporters play important roles in the process of Cr biosynthesis and distribution via permeation of Cr and Cr precursors across the plasma membrane.
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Affiliation(s)
- Ryuta Jomura
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Shin-Ichi Akanuma
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Masanori Tachikawa
- Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Shomachi, Tokushima 770-8505, Japan.
| | - Ken-Ichi Hosoya
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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22
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Kimura Y, Kanematsu Y, Sakagami H, Rivera Rocabado DS, Shimazaki T, Tachikawa M, Ishimoto T. Hydrogen/Deuterium Transfer from Anisole to Methoxy Radicals: A Theoretical Study of a Deuterium-Labeled Drug Model. J Phys Chem A 2022; 126:155-163. [PMID: 34981930 DOI: 10.1021/acs.jpca.1c08514] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recently, deuterium-labeled drugs, such as deutetrabenazine, have attracted considerable attention. Consequently, understanding the reaction mechanisms of deuterium-labeled drugs is crucial, both fundamentally and for real applications. To understand the mechanisms of H- and D-transfer reactions, in this study, we used deuterated anisole as a deutetrabenazine model and computationally considered the nuclear quantum effects of protons, deuterons, and electrons. We demonstrated that geometrical differences exist in the partially and fully deuterated methoxy groups and hydrogen-bonded structures of intermediates and transition states due to the H/D isotope effect. The observed geometrical features and electronic structures are ascribable to the different nuclear quantum effects of protons and deuterons. Primary and secondary kinetic isotope effects (KIEs) were calculated for H- and D-transfer reactions from deuterated and undeuterated anisole, with the calculated primary KIEs in good agreement with the corresponding experimental data. These results reveal that the nuclear quantum effects of protons and deuterons need to be considered when analyzing the reaction mechanisms of H- and D-transfer reactions and that a theoretical approach that directly includes nuclear quantum effects is a powerful tool for the analysis of H/D isotope effects in H- and D-transfer reactions.
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Affiliation(s)
- Yuka Kimura
- International College of Arts and Sciences, Yokohama City University, 22-2 Seto, Kanazawa, Yokohama 236-0027, Japan
| | - Yusuke Kanematsu
- Smart Innovation Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.,Division of Materials Model-Based Research, Digital Monozukuri (Manufacturing) Education and Research Center, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Hiroki Sakagami
- Graduate School of Data Science, Yokohama City University, 22-2 Seto, Kanazawa, Yokohama 236-0027, Japan
| | - David S Rivera Rocabado
- Smart Innovation Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Tomomi Shimazaki
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Graduate School of Data Science, Yokohama City University, 22-2 Seto, Kanazawa, Yokohama 236-0027, Japan
| | - Takayoshi Ishimoto
- Smart Innovation Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.,Division of Materials Model-Based Research, Digital Monozukuri (Manufacturing) Education and Research Center, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.,Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa, Yokohama 236-0027, Japan
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24
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Yoshida D, Kita Y, Shimazaki T, Tachikawa M. A comprehensive theoretical study of positron binding and annihilation properties of hydrogen bonded binary molecular clusters. Phys Chem Chem Phys 2022; 24:26898-26907. [DOI: 10.1039/d2cp03813g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Small hydrogen inorganic molecules such as water have no positron binding ability. We revealed that their hydrogen bonded binary molecular clusters exhibit greater positron affinities due to the increased dipole moments and polarization effect.
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Affiliation(s)
- Daisuke Yoshida
- Nishina Center for Accelerator-Based Science, RIKEN, Hirosawa 2-1, Wako 351-0198, Japan
| | - Yukiumi Kita
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Tomomi Shimazaki
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
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25
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Furushima M, Takagi M, Yoshida D, Kita Y, Shimazaki T, Tachikawa M. Theoretical investigations of positron affinities and their structure-dependent properties of carbon dioxide clusters (CO2)n (n = 1 – 5). Phys Chem Chem Phys 2022; 25:625-632. [DOI: 10.1039/d2cp03788b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
While positron binding to van der Waals intermolecular bonded clusters of non-polar carbon dioxide (CO2) molecule was experimentally suggested, the positron binding feature has been poorly understood. We investigate positron...
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26
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Ozaki M, Yoshida D, Kita Y, Shimazaki T, Tachikawa M. Positron Binding and Annihilation Properties of Amino Acid Systems. ACS Omega 2021; 6:29449-29458. [PMID: 34778617 PMCID: PMC8581980 DOI: 10.1021/acsomega.1c03409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
Despite the fact that the positron annihilation has been used in biomedical applications, the detailed mechanism of the positron annihilation on biological molecules remains poorly understood so far. In this work, we investigated the positron binding and positron annihilation properties for both global minimum and hydrogen-bonded structures of 20 amino acid molecules using the multicomponent molecular orbital method. By regression analysis, we confirmed that positron affinity can increase with an increase of the permanent dipole moment of the parent amino acids as reported in previous studies, while the annihilation rate linearly increases with respect to the square root of positron affinity. By the one-particle property analyses for probabilities of electron-positron contacts, we found that delocalization characteristics of both electrons and positrons play key roles to enhance the positron annihilation rate arising from both the valence electrons in σ- and π-type molecular orbitals from 2p atomic orbitals but not from the highest occupied molecular orbital electrons, particularly for comparatively weakly bound positronic amino acid systems.
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Affiliation(s)
- Maya Ozaki
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Daisuke Yoshida
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Yukiumi Kita
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Tomomi Shimazaki
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
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27
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Furushima M, Yoshida D, Kita Y, Shimazaki T, Tachikawa M. Theoretical investigation of the enhancement of positron affinity by the vibration and dimerization of non-polar carbon disulfide. Phys Chem Chem Phys 2021; 23:21512-21520. [PMID: 34515275 DOI: 10.1039/d1cp02808a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The positronic bound state for the non-polar carbon disulfide (CS2) has been experimentally identified, although previous theoretical investigations, which were dedicated to studying the positronic CS2 monomer, could not reasonably reproduce the experimentally measured positron affinity. In the present study, we performed analysis of the vibrational averaged positron affinity for the positronic CS2 dimer, [C2S4; e+], using the Hartree-Fock and configuration interaction levels of the multi-component molecular orbital method combined with the self-consistent field level of the vibrational variational Monte Carlo method. We demonstrated that the equilibrium structure of the non-polar C2S4 can have the positronic bound state with a positron affinity of about 46.18 meV in the configuration interaction level, while this is 0 meV in the Hartree-Fock level. Furthermore, by taking into account the vibrational effect, we succeeded in reproducing the resonant positron kinetic energies lying close to the experimental value, where the vibrational averaged positron affinity becomes greater with an increased dipole moment and dipole polarizability. We also showed possible mechanisms to effectively enhance the resonant positron capture for [C2S4; e+], associated with both the infrared active and infrared inactive vibrational modes.
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Affiliation(s)
- Miku Furushima
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Kanagawa, Japan.
| | - Daisuke Yoshida
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Kanagawa, Japan.
| | - Yukiumi Kita
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Kanagawa, Japan.
| | - Tomomi Shimazaki
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Kanagawa, Japan.
| | - Masanori Tachikawa
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Kanagawa, Japan.
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28
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Pan Y, Omori K, Ali I, Tachikawa M, Terasaki T, Brouwer KLR, Nicolazzo JA. Correction to Altered Expression of Small Intestinal Drug Transporters and Hepatic Metabolic Enzymes in a Mouse Model of Familial Alzheimer's Disease. Mol Pharm 2021; 18:3928-3929. [PMID: 34478315 DOI: 10.1021/acs.molpharmaceut.1c00661] [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: 11/29/2022]
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29
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Shimazaki T, Tachikawa M. A theoretical study on solvatofluorochromic asymmetric thiazolothiazole (TTz) dyes using dielectric-dependent density functional theory. Phys Chem Chem Phys 2021; 23:21078-21086. [PMID: 34523637 DOI: 10.1039/d1cp02047a] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this work, the excitation energies of asymmetric thiazolothizaole (TTz) dye molecules have been theoretically studied using dielectric-dependent density functional theory (DFT). In the dielectric-dependent DFT approach, the ratio (fraction) of the nonlocal Hartree exchange term incorporated into the DFT exchange-correlation functional is a system-dependent parameter, which is inversely proportional to the dielectric constant of the target material. The dielectric-dependent DFT method is closely related to the Coulomb hole and screened exchange (COHSEX) approximation in the GW method and therefore has been applied to crystalline systems with periodic boundary conditions, such as semiconductors and inorganic materials. By focusing on the solvatofluorochromic phenomena of asymmetric TTz dyes, we show that excitation energy calculations obtained from the dielectric-dependent DFT method can reproduce the corresponding experimental UV-vis absorption and emission spectra of dyes in solvents.
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Affiliation(s)
- Tomomi Shimazaki
- Department of Material System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, 236-0026, Japan.
| | - Masanori Tachikawa
- Department of Material System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, 236-0026, Japan.
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30
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Jomura R, Tanno Y, Akanuma SI, Kubo Y, Tachikawa M, Hosoya KI. Contribution of monocarboxylate transporter 12 to blood supply of creatine on the sinusoidal membrane of the hepatocytes. Am J Physiol Gastrointest Liver Physiol 2021; 321:G113-G122. [PMID: 34075817 DOI: 10.1152/ajpgi.00143.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Creatine (Cr)/phosphocreatine has the ability to buffer the high-energy phosphate, thereby contributing to intracellular energy homeostasis. As Cr biosynthetic enzyme deficiency is reported to increase susceptibility to colitis under conditions of inflammatory stress, Cr is critical for maintaining intestinal homeostasis under inflammatory stress. Cr is mainly produced in the hepatocytes and then distributed to other organs of the body by the circulatory system. Since monocarboxylate transporter 9 (MCT9) and monocarboxylate transporter 12 (MCT12) have been reported to accept Cr as a substrate, these transporters are proposed as candidates for Cr efflux transporter in the liver. The aim of this study was to elucidate the transport mechanism on Cr supply from the hepatocytes. Immunohistochemical staining of the rat liver sections revealed that both MCT9 and MCT12 were localized on the sinusoidal membrane of the hepatocytes. In the transport studies using Xenopus laevis oocyte expression system, [14C]Cr efflux from MCT9- or MCT12-expressing oocytes was significantly greater than that from water-injected oocytes. [14C]Cr efflux from primary cultured hepatocytes was significantly decreased following MCT12 mRNA knockdown, whereas this efflux was not decreased after mRNA knockdown of MCT9. Based on the extent of MCT12 protein downregulation and Cr efflux after knockdown of MCT12 in primary cultured rat hepatocytes, the contribution ratio of MCT12 in Cr efflux was calculated as 76.4%. Our study suggests that MCT12 substantially contributes to the efflux of Cr at the sinusoidal membrane of the hepatocytes.NEW & NOTEWORTHY Our study is the first to identify the role of monocarboxylate transporter 12 (MCT12) as a transporter of creatine (Cr) in the liver. MCT12 was found to significantly contribute to the efflux of Cr on the sinusoidal membrane of the hepatocytes. Since hepatocytes are known to be involved in creatine biosynthesis, the present findings can be beneficial for the regulation of Cr biosynthesis and supply.
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Affiliation(s)
- Ryuta Jomura
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Yu Tanno
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Shin-Ichi Akanuma
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Yoshiyuki Kubo
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Masanori Tachikawa
- Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - Ken-Ichi Hosoya
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
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31
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Udagawa T, Murphy RB, Darwish TA, Tachikawa M, Mori S. H/D Isotope Effects in Keto-Enol Tautomerism of β-Dicarbonyl Compounds —Importance of Nuclear Quantum Effects of Hydrogen Nuclei—. BCSJ 2021. [DOI: 10.1246/bcsj.20210083] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Taro Udagawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Rhys B. Murphy
- Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights NSW 2234, Australia
| | - Tamim A. Darwish
- Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights NSW 2234, Australia
| | - Masanori Tachikawa
- Graduate School of NanobioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Seiji Mori
- Institute of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
- Frontier Research Center for Applied Atomic Sciences, Ibaraki University, 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
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32
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Furuta T, Sugita Y, Komaki S, Ohshima K, Morioka M, Uchida Y, Tachikawa M, Ohtsuki S, Terasaki T, Nakada M. The Multipotential of Leucine-Rich α-2 Glycoprotein 1 as a Clinicopathological Biomarker of Glioblastoma. J Neuropathol Exp Neurol 2021; 79:873-879. [PMID: 32647893 DOI: 10.1093/jnen/nlaa058] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/02/2020] [Indexed: 01/14/2023] Open
Abstract
Leucine-rich α-2 glycoprotein 1 (LRG1) is a diagnostic marker candidate for glioblastoma. Although LRG1 has been associated with angiogenesis, it has been suggested that its biomarker role differs depending on the type of tumor. In this study, a clinicopathological examination of LRG1's role as a biomarker for glioblastoma was performed. We used tumor tissues of 155 cases with diffuse gliomas (27 astrocytomas, 14 oligodendrogliomas, 114 glioblastomas). The immunohistochemical LRG1 intensity scoring was classified into 2 groups: low expression and high expression. Mutations of IDH1, IDH2, and TERT promoter were analyzed through the Sanger method. We examined the relationship between LRG1 expression level in glioblastoma and clinical parameters, such as age, preoperative Karnofsky performance status, tumor location, extent of resection, O6-methylguanine DNA methyltransferase promoter, and prognosis. LRG1 high expression rate was 41.2% in glioblastoma, 3.7% in astrocytoma, and 21.4% in oligodendroglioma. Glioblastoma showed a significantly higher LRG1 expression than lower-grade glioma (p = 0.0003). High expression of LRG1 was an independent favorable prognostic factor (p = 0.019) in IDH-wildtype glioblastoma and correlated with gross total resection (p = 0.002) and the tumor location on nonsubventricular zone (p = 0.00007). LRG1 demonstrated multiple potential as a diagnostic, prognostic, and regional biomarker for glioblastoma.
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Affiliation(s)
- Takuya Furuta
- From the Department of Pathology; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan.,Department of Neurosurgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Yasuo Sugita
- From the Department of Pathology; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan.,Department of Neurosurgery; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan.,Kurume University School of Medicine; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan
| | - Satoru Komaki
- Department of Neurosurgery; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan
| | - Koichi Ohshima
- From the Department of Pathology; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan
| | - Motohiro Morioka
- Department of Neurosurgery; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan
| | - Yasuo Uchida
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai
| | - Masanori Tachikawa
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai.,Graduate School of Biomedical Sciences, Tokushima University, Tokushima
| | - Sumio Ohtsuki
- From the Department of Pathology; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan.,Department of Pharmaceutical Microbiology, Faculty of Life Sciences, Kumamoto University, Kumamoto
| | - Tetsuya Terasaki
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai
| | - Mitsutoshi Nakada
- From the Department of Pathology; Department of Neuropathology, St. Mary's Hospita, Kurume, Japan.,Department of Neurosurgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
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33
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Yodsin N, Sakagami H, Udagawa T, Ishimoto T, Jungsuttiwong S, Tachikawa M. Metal-doped carbon nanocones as highly efficient catalysts for hydrogen storage: Nuclear quantum effect on hydrogen spillover mechanism. Molecular Catalysis 2021. [DOI: 10.1016/j.mcat.2021.111486] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Sakagami H, Tachikawa M, Ishimoto T. Theoretical study of the H/D isotope effect of CH 4/CD 4 adsorption on a Rh(111) surface using a combined plane wave and localized basis sets method. RSC Adv 2021; 11:10253-10257. [PMID: 35423504 PMCID: PMC8696195 DOI: 10.1039/d0ra10796d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 03/01/2021] [Indexed: 12/29/2022] Open
Abstract
Using our CPLB method, we elucidate that the adsorption distance and adsorption energy of CH4 on the Rh(111) surface are shorter and larger than those of CD4, which is in reasonable agreement with the corresponding H/D isotope trend in experiments.
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Affiliation(s)
- Hiroki Sakagami
- Graduate School of Nanobioscience
- Yokohama City University
- Yokohama 236-0027
- Japan
| | - Masanori Tachikawa
- Graduate School of Data Science
- Yokohama City University
- Yokohama 236-0027
- Japan
| | - Takayoshi Ishimoto
- Graduate School of Nanobioscience
- Yokohama City University
- Yokohama 236-0027
- Japan
- Department of Applied Chemistry
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35
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Abstract
The H/D isotope effect in the CH···O interactions of several systems is systematically analyzed to determine whether it exerts control over reaction selectivity. Our theoretical study demonstrates that deuterium substitution has a negligible effect on CH···O interactions; thus, reaction selectivity likely cannot be controlled by the H/D isotope effect in these CH···O interactions.
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Affiliation(s)
- Haruki Funahashi
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
| | - Masanori Tachikawa
- Graduate School of NanobioScience, Yokohama City University, Yokohama 236-0027, Japan
| | - Taro Udagawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
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36
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Affiliation(s)
- Kazuaki Kuwahata
- Yokohama National University, 9-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Masanori Tachikawa
- Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
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37
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Ito S, Yoshida D, Kita Y, Tachikawa M. First-principles quantum Monte Carlo studies for prediction of double minima for positronic hydrogen molecular dianion. J Chem Phys 2020; 153:224305. [DOI: 10.1063/5.0022673] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Shumpei Ito
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Daisuke Yoshida
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Yukiumi Kita
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
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38
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Taii A, Tachikawa M, Ohta Y, Hosoya KI, Terasaki T. Determination of Intrinsic Creatine Transporter (Slc6a8) Activity and Creatine Transport Function of Leukocytes in Rats. Biol Pharm Bull 2020; 43:474-479. [PMID: 32115505 DOI: 10.1248/bpb.b19-00807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Creatine transporter (CRT) deficiency (CRT-D) results in a significant reduction of brain creatine levels, which causes various neurological symptoms in early childhood, and diagnosis of the severity of CRT-D based on the residual CRT transport activity in liquid biopsy samples would be beneficial for early intervention. The apparent reduction in creatine transport activity in CRT-D is thought to be due to reduced intrinsic CRT-mediated creatine transport per CRT protein and/or reduced absolute CRT protein expression on the plasma membranes. The purpose of this study was thus to determine the normal level of intrinsic CRT-mediated creatine transport activity based on absolute CRT protein quantification using rat CRT-overexpressing HEK293 cells (CRT/HEK293 cells), and to clarify creatine transport in erythrocyte- and leukocyte-enriched fractions isolated from the circulating blood of rats. The intrinsic creatine transport rate was calculated to be 0.237 µL/(min·fmol CRT) based on the initial uptake rate and the absolute CRT protein level in CRT/HEK293 cells. Taking into account Avogadro's constant, the creatine transport activity per CRT protein is estimated to be 1190 creatine/(min·CRT molecule) in the presence of [14C]creatine at an extracellular concentration of 5 µM. Isolated leukocyte-enriched fraction exhibited mRNA expression of CRT and partially Na+-dependent [14C]creatine transport, whereas erythrocytes showed neither. These characteristics suggest that the leukocytes contain the CRT-mediated creatine uptake system, and are available for evaluation of residual CRT transport activity in CRT-D patients.
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Affiliation(s)
- Ayaka Taii
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University
| | - Masanori Tachikawa
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University.,Graduate School of Biomedical Sciences, Tokushima University
| | - Yusuke Ohta
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University
| | - Ken-Ichi Hosoya
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
| | - Tetsuya Terasaki
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University
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39
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Jomura R, Tanno Y, Akanuma SI, Kubo Y, Tachikawa M, Hosoya KI. Monocarboxylate transporter 12 as a guanidinoacetate efflux transporter in renal proximal tubular epithelial cells. Biochim Biophys Acta Biomembr 2020; 1862:183434. [PMID: 32781157 DOI: 10.1016/j.bbamem.2020.183434] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022]
Abstract
Guanidinoacetate (GAA), which is a precursor of creatine, is mainly biosynthesized in the renal proximal tubular epithelial cells (RPTECs). Plasma concentration of GAA has been reported to be reduced in patients with monocarboxylate transporter 12 (MCT12) mutation (p.Q215X). However, the mechanism underlying GAA release from the RPTECs remains unclear. Therefore, to elucidate the role of MCT12 in renal GAA release, MCT12-mediated GAA transport was evaluated using the human and rat MCT12-expressing Xenopus laevis oocytes and primary-cultured rat RPTECs. [14C]GAA uptake by the human and rat MCT12-expressing oocytes was significantly higher than that by the water-injected oocytes. Rat MCT12-mediated uptake of [14C]GAA by the oocytes was found to be sodium ion (Na+)-independent and exhibited saturable kinetics with a Michaelis-Menten constant of 3.38 mM. Transport activities of rat MCT12 tend to increase along with increasing of extracellular pH. In addition, the efflux transport of [14C]GAA from the human and rat MCT12-expressing oocytes was significantly higher than that from the water-injected oocytes. These results suggest that both the influx and efflux transport of GAA is mediated by MCT12. In the primary-cultured rat RPTECs, [14C]GAA efflux transport was significantly reduced by the transfection of MCT12-specific siRNAs, suggesting that MCT12 participates in GAA efflux transport in rat RPTECs. Therefore, it suggests that MCT12 is involved in GAA release from RPTECs to the circulating blood, since MCT12 is known to be localized on the basal membrane of RPTECs.
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Affiliation(s)
- Ryuta Jomura
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Yu Tanno
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Shin-Ichi Akanuma
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Yoshiyuki Kubo
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Masanori Tachikawa
- Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Shomachi, Tokushima 770-8505, Japan.
| | - Ken-Ichi Hosoya
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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40
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Hoshi Y, Uchida Y, Kuroda T, Tachikawa M, Couraud PO, Suzuki T, Terasaki T. Distinct roles of ezrin, radixin and moesin in maintaining the plasma membrane localizations and functions of human blood-brain barrier transporters. J Cereb Blood Flow Metab 2020; 40:1533-1545. [PMID: 31409174 PMCID: PMC7308513 DOI: 10.1177/0271678x19868880] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The purpose of this study was to clarify the roles of ERM proteins (ezrin/radixin/moesin) in the regulation of membrane localization and transport activity of transporters at the human blood-brain barrier (BBB). Ezrin or moesin knockdown in a human in vitro BBB model cell line (hCMEC/D3) reduced both BCRP and GLUT1 protein expression levels on the plasma membrane. Radixin knockdown reduced not only BCRP and GLUT1, but also P-gp membrane expression. These results indicate that P-gp, BCRP and GLUT1 proteins are maintained on the plasma membrane via different ERM proteins. Furthermore, moesin knockdown caused the largest decrease of P-gp and BCRP efflux activity among the ERM proteins, whereas GLUT1 influx activity was similarly reduced by knockdown of each ERM protein. To investigate how moesin knockdown reduced P-gp efflux activity without loss of P-gp from the plasma membrane, we examined the role of PKCβI. PKCβI increased P-gp phosphorylation and reduced P-gp efflux activity. Radixin and moesin proteins were detected in isolated human brain capillaries, and their protein abundances were within a 3-fold range, compared with those in hCMEC/D3 cell line. These findings may mean that ezrin, radixin and moesin maintain the functions of different transporters in different ways at the human BBB.
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Affiliation(s)
- Yutaro Hoshi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yasuo Uchida
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Takashi Kuroda
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Masanori Tachikawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | | | - Takashi Suzuki
- Department of Pathology and Histotechnology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tetsuya Terasaki
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
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41
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Sugiura Y, Suzuki H, Otomo T, Miyazaki T, Takayanagi T, Tachikawa M. Positron-electron correlation-polarization potential model for positron binding in polyatomic molecules. J Comput Chem 2020; 41:1576-1585. [PMID: 32227515 DOI: 10.1002/jcc.26200] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/16/2020] [Accepted: 03/17/2020] [Indexed: 11/06/2022]
Abstract
Positron binding energies (PBEs) of 41 polyatomic molecules were calculated using the positron-electron correlation-polarization potential (CPP) approach and compared with experimentally measured values. In this approach, the short-range positron-electron potential is modeled using the density-functional expression, whereas the long-range potential is approximated by the attractive polarization potential. The positron-electron CPP model based on local-density approximation yields larger PBEs than experimental values; however, the calculated values can be substantially improved by introducing generalized gradient approximation. We also investigated the conformational dependence of PBEs for representative molecules.
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Affiliation(s)
- Yutaro Sugiura
- Department of Chemistry, Saitama University, Saitama City, Saitama, Japan
| | - Haruya Suzuki
- Department of Chemistry, Saitama University, Saitama City, Saitama, Japan
| | - Takuma Otomo
- Department of Chemistry, Saitama University, Saitama City, Saitama, Japan
| | - Takaaki Miyazaki
- Department of Chemistry, Saitama University, Saitama City, Saitama, Japan
| | | | - Masanori Tachikawa
- Graduate School of Nanobioscience, Yokohama City University, Yokohama, Kanagawa, Japan
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42
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Affiliation(s)
- Yusuke Ishida
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Haruki Funahashi
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Masanori Tachikawa
- Quantum Chemistry Division, Graduate School of NanoBioScience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Taro Udagawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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43
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Inagaki M, Nishimura T, Nakanishi T, Shimada H, Noguchi S, Akanuma SI, Tachikawa M, Hosoya KI, Tamai I, Nakashima E, Tomi M. Contribution of Prostaglandin Transporter OATP2A1/SLCO2A1 to Placenta-to-Maternal Hormone Signaling and Labor Induction. iScience 2020; 23:101098. [PMID: 32408168 PMCID: PMC7225742 DOI: 10.1016/j.isci.2020.101098] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 01/15/2020] [Revised: 03/22/2020] [Accepted: 04/21/2020] [Indexed: 01/09/2023] Open
Abstract
We evaluated the contribution of organic anion transporting polypeptide 2A1 (OATP2A1/SLCO2A1), a high-affinity carrier for prostaglandins (PGs), to the parturition process. At gestational day (GD) 15.5, OATP2A1 is co-localized with 15-hydroxy-PG dehydrogenase in the mouse placental junctional zone and facilitates PG degradation by delivering PGs to the cytoplasm. Slco2a1 (+/−) females mated with Slco2a1 (−/−) males frequently showed elevated circulating progesterone at GD18.5 and delayed parturition. Progesterone receptor inhibition by RU486 treatment at GD18.5 blocked the delay of parturition. In the junctional zone, PGE2 stimulated placental lactogen II (PL-II) production, resulting in higher expression of PL-II in Slco2a1 (−/−) placenta at GD18.5. Indomethacin treatment at GD15.5 suppressed the PL-II overproduction at GD18.5 in Slco2a1 (−/−) embryo-bearing dams, which promoted progesterone withdrawal and corrected the delayed parturition. These results suggest that extracellular PGE2 reduction by OATP2A1 at mid-pregnancy would be associated with progesterone withdrawal by suppressing PL-II production, triggering parturition onset. Placental OATP2A1 promotes PGE2 degradation by delivering PGE2 to the cytoplasm Placental PGE2 stimulates the PL-II production Extracellular PGE2 decrease by placental OATP2A1 promotes progesterone withdrawal Feto-placental OATP2A1 is associated with the initiation of parturition
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Affiliation(s)
- Mai Inagaki
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo 105-8512, Japan
| | | | - Takeo Nakanishi
- Faculty of Pharmacy, Takasaki University of Health and Welfare, Takasaki, Gunma 370-0033, Japan; Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Hiroaki Shimada
- Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka 577-8502, Japan
| | - Saki Noguchi
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo 105-8512, Japan
| | - Shin-Ichi Akanuma
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Masanori Tachikawa
- Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8505, Japan
| | - Ken-Ichi Hosoya
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Ikumi Tamai
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Emi Nakashima
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo 105-8512, Japan
| | - Masatoshi Tomi
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo 105-8512, Japan.
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Uchida Y, Yagi Y, Takao M, Tano M, Umetsu M, Hirano S, Usui T, Tachikawa M, Terasaki T. Comparison of Absolute Protein Abundances of Transporters and Receptors among Blood–Brain Barriers at Different Cerebral Regions and the Blood–Spinal Cord Barrier in Humans and Rats. Mol Pharm 2020; 17:2006-2020. [DOI: 10.1021/acs.molpharmaceut.0c00178] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yasuo Uchida
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Yuta Yagi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Masaki Takao
- Department of Neurology and Brain Bank, Mihara Memorial Hospital, Isesaki 372-0006, Japan
- Department of Neurology, Saitama International Medical Center, Saitama Medical University, Hidaka 350-0495, Japan
| | - Mitsutoshi Tano
- Department of Neurology and Brain Bank, Mihara Memorial Hospital, Isesaki 372-0006, Japan
| | - Mina Umetsu
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Satoshi Hirano
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Takuya Usui
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Masanori Tachikawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Tetsuya Terasaki
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
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Tachikawa M, Akaogi R, Taii A, Akanuma SI, Uchida Y, Terasaki T. Distinct Transport Properties of Human Pannexin 1 and Connexin 32 Hemichannels. J Pharm Sci 2020; 109:1395-1402. [PMID: 31837976 DOI: 10.1016/j.xphs.2019.12.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 12/05/2019] [Accepted: 12/06/2019] [Indexed: 11/19/2022]
Abstract
Pannexin (Px) and connexin (Cx) hemichannels mediate bidirectional membrane transport in response to various stimuli and are involved in drug efficacy and toxicity. The purpose of the present study was to clarify in detail the transport characteristics of Px1 and Cx32 hemichannels by establishing transport assay systems using human Px1- and P2RX7 receptor-overexpressing HEK293 cells (Px1/P2RX7/HEK293) and Cx32-overexpressing HEK293 cells (Cx32/HEK293), in which P2RX7 and an extracellular Ca2+-depleted condition serve as the opening trigger, respectively. Uptake of the cationic fluorescent dye propidium iodide (PI) was significantly increased in Px1/P2RX7/HEK293 cells compared to that in mock cells, whereas there was no significant uptake of the anionic fluorescent dye sulforhodamine 101 (SR101). Uptake of [3H]cholesterol by Px1/P2RX7/HEK293 cells was significantly decreased, whereas that of [3H]taurine was not, compared to mock cells. On the other hand, uptakes of PI and SR-101 by Cx32/HEK293 cells were both significantly increased compared to mock cells. The PI uptake by Cx32/HEK293 cells was significantly inhibited by thioacetamide, acetaminophen, and N-acetyl-p-benzoquinoneimine. Cellular uptake of [3H]cholesterol was significantly increased in Cx32/HEK293 cells and that of [3H]taurine was significantly decreased. These results support the idea that Px1 and Cx32 hemichannels have distinct substrate recognition specificities and transport directions.
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Affiliation(s)
- Masanori Tachikawa
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki, Aoba, Sendai 980-8578, Japan; Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Shomachi, Tokushima 770-8505, Japan.
| | - Ryo Akaogi
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki, Aoba, Sendai 980-8578, Japan
| | - Ayaka Taii
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki, Aoba, Sendai 980-8578, Japan
| | - Shin-Ichi Akanuma
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Yasuo Uchida
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki, Aoba, Sendai 980-8578, Japan
| | - Tetsuya Terasaki
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki, Aoba, Sendai 980-8578, Japan
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Hellinen L, Sato K, Reinisalo M, Kidron H, Rilla K, Tachikawa M, Uchida Y, Terasaki T, Urtti A. Quantitative Protein Expression in the Human Retinal Pigment Epithelium: Comparison Between Apical and Basolateral Plasma Membranes With Emphasis on Transporters. Invest Ophthalmol Vis Sci 2020; 60:5022-5034. [PMID: 31791063 DOI: 10.1167/iovs.19-27328] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Retinal pigment epithelium (RPE) limits the xenobiotic entry from the systemic blood stream to the eye. RPE surface transporters can be important in ocular drug distribution, but it has been unclear whether they are expressed on the apical, basal, or both cellular surfaces. In this paper, we provide quantitative comparison of apical and basolateral RPE surface proteomes. Methods We separated the apical and basolateral membranes of differentiated human fetal RPE (hfRPE) cells by combining apical membrane peeling and sucrose density gradient centrifugation. The membrane fractions were analyzed with quantitative targeted absolute proteomics (QTAP) and sequential window acquisition of all theoretical fragment ion spectra mass spectrometry (SWATH-MS) to reveal the membrane protein localization on the RPE cell surfaces. We quantitated 15 transporters in unfractionated RPE cells and scaled their expression to tissue level. Results Several proteins involved in visual cycle, cell adhesion, and ion and nutrient transport were expressed on the hfRPE plasma membranes. Most drug transporters showed similar abundance on both RPE surfaces, whereas large neutral amino acids transporter 1 (LAT1), p-glycoprotein (P-gp), and monocarboxylate transporter 1 (MCT1) showed modest apical enrichment. Many solute carriers (SLC) that are potential prodrug targets were present on both cellular surfaces, whereas putative sodium-coupled neutral amino acid transporter 7 (SNAT7) and riboflavin transporter (RFT3) were enriched on the basolateral and sodium- and chloride-dependent neutral and basic amino acid transporter (ATB0+) on the apical membrane. Conclusions Comprehensive quantitative information of the RPE surface proteomes was reported for the first time. The scientific community can use the data to further increase understanding of the RPE functions. In addition, we provide insights for transporter protein localization in the human RPE and the significance for ocular pharmacokinetics.
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Affiliation(s)
- Laura Hellinen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Kazuki Sato
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Mika Reinisalo
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.,Institute of Clinical Medicine, Department of Ophthalmology, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Heidi Kidron
- Drug Research Programme, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
| | - Kirsi Rilla
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Masanori Tachikawa
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yasuo Uchida
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Tetsuya Terasaki
- Division of Membrane Transport and Drug Targeting, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Arto Urtti
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.,Drug Research Programme, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,Laboratory of Biohybrid Technologies, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russian Federation
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Kanematsu Y, Kato HS, Yoshimoto S, Ueda A, Yamamoto S, Mori H, Yoshinobu J, Matsuda I, Tachikawa M. A computational examination of the electric-field-induced proton transfer along the interface hydrogen bond between proton donating and accepting self-assembled monolayers. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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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Omori K, Tachikawa M, Hirose S, Taii A, Akanuma SI, Hosoya KI, Terasaki T. Developmental changes in transporter and receptor protein expression levels at the rat blood-brain barrier based on quantitative targeted absolute proteomics. Drug Metab Pharmacokinet 2020; 35:117-123. [DOI: 10.1016/j.dmpk.2019.09.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 09/17/2019] [Accepted: 09/24/2019] [Indexed: 02/02/2023]
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Hoshi Y, Uchida Y, Tachikawa M, Ohtsuki S, Couraud PO, Suzuki T, Terasaki T. Oxidative stress-induced activation of Abl and Src kinases rapidly induces P-glycoprotein internalization via phosphorylation of caveolin-1 on tyrosine-14, decreasing cortisol efflux at the blood-brain barrier. J Cereb Blood Flow Metab 2020; 40:420-436. [PMID: 30621530 PMCID: PMC7370610 DOI: 10.1177/0271678x18822801] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Exposure of the brain to high levels of glucocorticoids during ischemia-reperfusion induces neuronal cell death. Oxidative stress alters blood-brain barrier (BBB) function during ischemia-reperfusion, and so we hypothesized that it might impair P-glycoprotein (P-gp)-mediated efflux transport of glucocorticoids at the BBB. Therefore, the purpose of this study was to clarify the molecular mechanism of this putative decrease of P-gp-mediated efflux function. First, we established that H2O2 treatment of a human in vitro BBB model (hCMEC/D3) reduced both P-gp efflux transport activity and protein expression on the plasma membrane within 20 min. These results suggested that the rapid decrease of efflux function might be due to internalization of P-gp. Furthermore, H2O2 treatment markedly increased tyrosine-14-phosphorylated caveolin-1, which is involved in P-gp internalization. A brain perfusion study in rats showed that cortisol efflux at the BBB was markedly decreased by H2O2 administration, and inhibitors of Abl kinase and Src kinase, which phosphorylate tyrosine-14 in caveolin-1, suppressed this decrease. Overall, these findings support the idea that oxidative stress-induced activation of Abl kinase and Src kinase induces internalization of P-gp via the phosphorylation of tyrosine-14 in caveolin-1, leading to a rapid decrease of P-gp-mediated cortisol efflux at the BBB.
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Affiliation(s)
- Yutaro Hoshi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yasuo Uchida
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Masanori Tachikawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Sumio Ohtsuki
- Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | | | - Takashi Suzuki
- Department of Pathology and Histotechnology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tetsuya Terasaki
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
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Wakahara T, Nagaoka K, Nakagawa A, Hirata C, Matsushita Y, Miyazawa K, Ito O, Wada Y, Takagi M, Ishimoto T, Tachikawa M, Tsukagoshi K. One-Dimensional Fullerene/Porphyrin Cocrystals: Near-Infrared Light Sensing through Component Interactions. ACS Appl Mater Interfaces 2020; 12:2878-2883. [PMID: 31845789 DOI: 10.1021/acsami.9b18784] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Recently, organic donor-acceptor (D-A) cocrystals have attracted special interest as functional materials because of their unique chemical and physical properties that are not exhibited by simple mixtures of their components. Herein, we report the preparation of one-dimensional novel D-A cocrystals from C60 and 5,10,15,20-tetrakis(3,5-dimethoxyphenyl)porphyrin (3,5-TPP); these cocrystals have near-infrared (NIR) light-sensing abilities, despite each of their component molecule individually having no NIR light-sensing properties. Micrometer-sized rectangular columnar C60-3,5-TPP cocrystals were produced by a simple liquid-liquid interfacial precipitation method. The cocrystals exhibit a new strong transition in the NIR region indicative of the existence of charge-transfer interactions between C60 and 3,5-TPP in the cocrystals. The C60-3,5-TPP cocrystals showed n-type transport characteristics with NIR light-sensing properties when the cocrystals were incorporated in bottom-gate/bottom-contact organic phototransistors, revealing that organic cocrystals with suitable charge-transfer interaction are useful as functional materials for the creation of novel NIR-light-sensing devices.
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Affiliation(s)
- Takatsugu Wakahara
- Research Center for Functional Materials , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Kahori Nagaoka
- Research Center for Functional Materials , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Akari Nakagawa
- Research Center for Functional Materials , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Chika Hirata
- Research Center for Functional Materials , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Yoshitaka Matsushita
- Research Network and Facility Services Division , National Institute for Materials Science , 1-2-1 Sengen , Tsukuba , Ibaraki 305-0047 , Japan
| | - Kun'ichi Miyazawa
- Department of Industrial Chemistry, Faculty of Engineering , Tokyo University of Science , Tokyo 162-0826 , Japan
| | - Osamu Ito
- Research Center for Functional Materials , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
- CarbonPhotoScience Institute , Kita-Nakayama2-1-6 , Izumi-ku, Sendai 981-3215 , Japan
| | - Yoshiki Wada
- Research Center for Functional Materials , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Makito Takagi
- Graduate School of Nanobioscience , Yokohama City University , 22-2 Seto , Kanazawa-ku, Yokohama , Kanagawa 236-0027 , Japan
| | - Takayoshi Ishimoto
- Graduate School of Nanobioscience , Yokohama City University , 22-2 Seto , Kanazawa-ku, Yokohama , Kanagawa 236-0027 , Japan
| | - Masanori Tachikawa
- Graduate School of Nanobioscience , Yokohama City University , 22-2 Seto , Kanazawa-ku, Yokohama , Kanagawa 236-0027 , Japan
| | - Kazuhito Tsukagoshi
- International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
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