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Shimazaki T, Iguchi T, Takahashi N, Sano Y, Nakamura K, Mimaki Y. Steroidal glycosides from Ornithogalum thyrsoides bulbs and their cytotoxicity toward HL-60 human promyelocytic leukemia cells and SBC-3 human small-cell lung cancer cells. Phytochemistry 2024; 219:113985. [PMID: 38237845 DOI: 10.1016/j.phytochem.2024.113985] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/09/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024]
Abstract
Ornithogalum thyrsoides Jacq belongs to the Asparagaceae family and is cultivated for ornamental purposes. The authors have previously reported several cholestane- and spirostan-type steroidal glycosides from O. thyrsoides. Conventional TLC analysis of the methanolic bulb extract of O. thyrsoides suggested the presence of unprecedented compounds; therefore, a detailed phytochemical investigation of the extract was performed and 35 steroidal glycosides (1-35), including 21 previously undescribed ones (1-21) were collected. The structures of 1-21 were determined mainly by analyses of their 1H and 13C NMR spectra with the aid of two-dimensional NMR spectroscopy. The isolated compounds were classified into three distinct groups: furostan-type (1, 2, 8-12, and 22), spirostan-type (3-7 and 23-26), and cholestane-type (13-21 and 27-35). Although the C/D-ring junction of the steroidal skeleton is typically trans-oriented, except for some cardiotonic and pregnane-type steroidal derivatives, 7 possess a cis C/D-ring junction. This is the first reported instance of such a configuration in spirostan-type steroidal derivatives, marking it as a finding of significant interest. Compounds 1-35 were evaluated for cytotoxicity against HL-60 human promyelocytic leukemia cells and SBC-3 human small-cell lung cancer cells. Compounds 3-6, 9, 17-21, 23-25, and 30-35 demonstrated cytotoxicity in a dose-dependent manner with IC50 values ranging from 0.000086 to 18 μM and from 0.00014 to 37 μM toward HL-60 and SBC-3 cells, respectively. Compound 19, which is obtained in a good yield and shows relatively potent cytotoxicity among the undescribed compounds, induces apoptosis in HL-60 cells, accompanied by arresting the cell cycle of HL-60 cells at the G2/M phase. In contrast, 19 causes oxidative stress-associated necrosis in SBC-3 cells. The cytotoxic mechanism of 19 is different between HL-60 and SBC-3 cells.
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Affiliation(s)
- Tamami Shimazaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan.
| | - Naoki Takahashi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Yukako Sano
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Kaito Nakamura
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
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Shimazaki T, Iguchi T, Takahashi Y, Yamamoto K, Takahashi N, Mimaki Y. Determination of Structure and Cytotoxicity of Ten Undescribed Steroidal Glycosides from Allium cristophii × A. macleanii 'Globemaster'. Molecules 2023; 28:6248. [PMID: 37687077 PMCID: PMC10488941 DOI: 10.3390/molecules28176248] [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: 07/31/2023] [Revised: 08/11/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
'Globemaster' is an ornamental hybrid cultivar whose parent plants are Allium cristophii and A. macleanii. The chemical constituents of 'Globemaster' bulbs have not yet been examined; thus, a systematic phytochemical investigation was undertaken herein. A series of chromatographic separations of the MeOH extract of 'Globemaster' bulbs afforded 27 steroidal glycosides (1-27), which are classified into 23 spirostanol glycosides (1-8 and 11-25), two furostanol glycosides (9 and 26), a pregnane glycoside (10), and a cholestane glycoside (27). The structures of the hitherto undescribed compounds (1-10) were determined from the two-dimensional NMR spectroscopic data and hydrolysis. The cytotoxicity of the isolated compounds (1-27) toward HL-60 human promyelocytic leukemia cells, A549 human adenocarcinoma lung cancer cells, and SBC-3 human small-cell lung cancer cells was evaluated. Compounds 8, 22, 23, 24, and 26 exhibited cytotoxicity toward all cell lines in a dose-dependent manner, with IC50 values in the 1.3-49 µM range.
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Affiliation(s)
| | - Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji 192-0392, Tokyo, Japan; (T.S.); (Y.T.); (K.Y.); (N.T.); (Y.M.)
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Kato Y, Shirai R, Ohbuchi K, Oizumi H, Yamamoto M, Miyata W, Iguchi T, Mimaki Y, Miyamoto Y, Yamauchi J. Hesperetin Ameliorates Inhibition of Neuronal and Oligodendroglial Cell Differentiation Phenotypes Induced by Knockdown of Rab2b, an Autism Spectrum Disorder-Associated Gene Product. Neurol Int 2023; 15:371-391. [PMID: 36976668 PMCID: PMC10057161 DOI: 10.3390/neurolint15010025] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/20/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
Autism spectrum disorder (ASD) is a central nervous system (CNS) neurodevelopmental disorder that includes autism, pervasive developmental disorder, and Asperger’s syndrome. ASD is characterized by repetitive behaviors and social communication deficits. ASD is thought to be a multifactorial disorder with a range of genetic and environmental factors/candidates. Among such factors is the rab2b gene, although it remains unclear how Rab2b itself is related to the CNS neuronal and glial developmental disorganization observed in ASD patients. Rab2 subfamily members regulate intracellular vesicle transport between the endoplasmic reticulum and the Golgi body. To the best of our knowledge, we are the first to report that Rab2b positively regulates neuronal and glial cell morphological differentiation. Knockdown of Rab2b inhibited morphological changes in N1E-115 cells, which are often used as the neuronal cell differentiation model. These changes were accomplished with decreased expression levels of marker proteins in neuronal cells. Similar results were obtained for FBD-102b cells, which are used as the model of oligodendroglial cell morphological differentiation. In contrast, knockdown of Rab2a, which is another Rab2 family member not known to be associated with ASD, affected only oligodendroglial and not neuronal morphological changes. In contrast, treatment with hesperetin, a citrus flavonoid with various cellular protective effects, in cells recovered the defective morphological changes induced by Rab2b knockdown. These results suggest that knockdown of Rab2b inhibits differentiation in neuronal and glial cells and may be associated with pathological cellular phenotypes in ASD and that hesperetin can recover their phenotypes at the in vitro level at least.
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Affiliation(s)
- Yukino Kato
- Department of Molecular Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji 192-0392, Tokyo, Japan; (Y.K.); (W.M.); (Y.M.)
| | - Remina Shirai
- Department of Molecular Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji 192-0392, Tokyo, Japan; (Y.K.); (W.M.); (Y.M.)
| | - Katsuya Ohbuchi
- Tsumura Research Laboratories, Tsumura & Co., Inashiki 200-1192, Ibaraki, Japan; (K.O.); (H.O.); (M.Y.)
| | - Hiroaki Oizumi
- Tsumura Research Laboratories, Tsumura & Co., Inashiki 200-1192, Ibaraki, Japan; (K.O.); (H.O.); (M.Y.)
| | - Masahiro Yamamoto
- Tsumura Research Laboratories, Tsumura & Co., Inashiki 200-1192, Ibaraki, Japan; (K.O.); (H.O.); (M.Y.)
| | - Wakana Miyata
- Department of Molecular Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji 192-0392, Tokyo, Japan; (Y.K.); (W.M.); (Y.M.)
| | - Tomoki Iguchi
- Department of Medicinal Pharmacognosy, Tokyo University of Pharmacy and Life Sciences, Hachioji 192-0392, Tokyo, Japan; (T.I.); (Y.M.)
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, Tokyo University of Pharmacy and Life Sciences, Hachioji 192-0392, Tokyo, Japan; (T.I.); (Y.M.)
| | - Yuki Miyamoto
- Department of Molecular Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji 192-0392, Tokyo, Japan; (Y.K.); (W.M.); (Y.M.)
- Department of Pharmacology, National Research Institute for Child Health and Development, Setagaya 157-8535, Tokyo, Japan
| | - Junji Yamauchi
- Department of Molecular Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji 192-0392, Tokyo, Japan; (Y.K.); (W.M.); (Y.M.)
- Department of Pharmacology, National Research Institute for Child Health and Development, Setagaya 157-8535, Tokyo, Japan
- Diabetic Neuropathy Project, Tokyo Metropolitan Institute of Medical Science, Setagaya 156-8506, Tokyo, Japan
- Correspondence: ; Tel.: +81-42-676-7164; Fax: +81-42-676-8841
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Takahashi N, Iguchi T, Nagamine A, Shirai R, Nagata A, Yamauchi J, Mimaki Y. Structure Elucidation of 16 Undescribed Steroidal Glycosides from the Underground Parts of Agapanthus africanus and Apoptosis-Inducing Activity in Small-Cell Lung Cancer Cell. ACS Omega 2023; 8:2808-2830. [PMID: 36687079 PMCID: PMC9851033 DOI: 10.1021/acsomega.2c07766] [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: 12/06/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
To explore new candidates for anticancer agents from natural products, the underground parts of Agapanthus africanus, commonly used as an ornamental plant, were investigated phytochemically. As a result, 16 undescribed steroidal glycosides (1-16) were obtained, and their structures were determined mainly by NMR spectroscopic analysis and chemical transformations. The cytotoxic activities of the isolated compounds (1-16) against SBC-3 human small-cell lung cancer cells, A549 human adenocarcinoma cells, and HL-60 human promyelocytic leukemia cells were evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2-tetrazolium bromide (MTT) assay. Compound 1, a bisdesmosidic furostanol glycoside, and 10, a bisdesmosidic spirostanol glycoside, were cytotoxic to all three cell lines with IC50 values ranging from 1.2 to 13 μM. As 1 exhibited the most potent cytotoxicity against SBC-3 cells among the isolated compounds, its apoptosis-inducing activity toward SBC-3 cells was examined. Compound 1 arrested SBC-3 cells at the G2/M phase of the cell cycle and effectively induced apoptosis via an intrinsic pathway accompanied by the dissipation of membrane potential and morphological changes in mitochondria.
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Affiliation(s)
- Naoki Takahashi
- Department
of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Tomoki Iguchi
- Department
of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Anju Nagamine
- Department
of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Remina Shirai
- Laboratory
of Molecular Neurology, School of Life Science, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Akihiro Nagata
- Department
of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Junji Yamauchi
- Laboratory
of Molecular Neurology, School of Life Science, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
- Department
of Pharmacology, National Research Institute
for Child Health and Development, 2-10-1, Okura, Setagaya, Tokyo 157-8535, Japan
| | - Yoshihiro Mimaki
- Department
of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
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Petrylak D, Azad A, Szmulewitz R, Iguchi T, Shore N, Holzbeierlein J, Alekseev B, El-Chaar N, Rosbrook B, Ma J, Zohren F, Haas G, Stenzl A, Armstrong A. 1398P Overall survival (OS) in patients (pts) with metastatic hormone-sensitive prostate cancer (mHSPC) who received prior androgen deprivation therapy (ADT) and reached low prostate-specific antigen (PSA) levels treated further with enzalutamide (ENZA): Post hoc analyses of ARCHES. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1884] [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: 11/01/2022] Open
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Yokosuka A, Ishihara K, Yamada T, Iguchi T, Mimaki Y. Steroidal Glycosides from the Aerial Parts of Avena sativa L. and Their Cytotoxic Activity. J Agric Food Chem 2021; 69:14568-14579. [PMID: 34845902 DOI: 10.1021/acs.jafc.1c05782] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Twelve steroidal glycosides (1-12) were isolated from the aerial parts of Avena sativa L. (Poaceae). Among the isolated compounds, 1 was directly isolated from the plant for the first time, and 2-6 were new steroidal glycosides. The structures of 1-6 were determined by analysis of their spectroscopic data, chemical transformations, and chromatographic and spectroscopic analyses of the hydrolyzed products. Compounds 5 and 6 were novel steroidal glycosides with a B-ring contracted skeleton (B-nor steroid). Compounds 1, 9, 11, and 12 were cytotoxic to HL-60 human promyelocytic leukemia cells, MIA PaCa-2 human pancreatic carcinoma cells, and A549 human lung adenocarcinoma cells with IC50 values ranging from 0.79 to 13.5 μM. HL-60 cells treated with 1 exhibited apoptotic characteristics, namely, condensed nuclear chromatin, accumulation of sub-G1 cells, and activation of caspase-3. Additionally, the loss of the mitochondrial membrane potential and the release of cytochrome c into the cytoplasm in 1-treated HL-60 cells suggested that 1 induced apoptosis through a mitochondrial-dependent apoptotic pathway.
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Affiliation(s)
- Akihito Yokosuka
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Keita Ishihara
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Tsuyoshi Yamada
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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Yokosuka A, Iguchi T, Jitsuno M, Mimaki Y. Structure and Cytotoxicity of Novel Lignans and Lignan Glycosides from the Aerial Parts of Larrea tridentata. Molecules 2021; 26:6186. [PMID: 34684767 PMCID: PMC8540297 DOI: 10.3390/molecules26206186] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/09/2021] [Accepted: 10/11/2021] [Indexed: 12/05/2022] Open
Abstract
Previously, the authors conducted phytochemical investigations of the aerial parts of Larrea tridentata and reported triterpene glycosides and lignan derivatives. In continuation of the preceding studies, 17 lignans and lignan glycosides (1-17) were isolated, including seven new compounds (1-7). Herein, the structure of the new compounds was determined based on spectroscopic analysis and enzymatic hydrolysis. The cytotoxicity of 1-17 against HL-60 human promyelocytic leukemia cells was examined. Compounds 4-11 and 14-16 were cytotoxic to HL-60 cells, with IC50 values in the range of 2.7-17 μM. Compound 6, which was the most cytotoxic among the unprecedented compounds, was shown to induce apoptotic cell death in HL-60 cells.
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Affiliation(s)
| | - Tomoki Iguchi
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan; (A.Y.); (M.J.); (Y.M.)
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Armstrong A, Iguchi T, Azad A, Szmulewitz R, Holzbeierlein J, Villers A, Alcaraz A, Alekseev B, Shore N, Petrylak D, Rosbrook B, Zohren F, Yamada S, Haas G, Stenzl A. LBA25 Final overall survival (OS) analysis from ARCHES: A phase III, randomized, double-blind, placebo (PBO)-controlled study of enzalutamide (ENZA) + androgen deprivation therapy (ADT) in men with metastatic hormone-sensitive prostate cancer (mHSPC). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.2101] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Iguchi T, Kuroda M, Takayama H, Mimaki Y. Three novel furospirostanol glycosides and a steroidal alkaloid glycoside from the bulbs of Fritillaria camtschatcensis (L.) Ker Gawl., and their cytotoxicity. Nat Prod Res 2021; 36:3917-3923. [PMID: 33715543 DOI: 10.1080/14786419.2021.1897590] [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: 10/21/2022]
Abstract
Three novel steroidal glycosides (1-3) and a previously described steroidal alkaloid glycoside (4) have been isolated from the bulbs of Fritillaria camtschatcensis (L.) Ker Gawl. (Liliaceae). The structures of novel compounds 1-3 were characterized based on NMR spectroscopy and chemical transformations. Compounds 1-3 are furospirostanol glycosides bearing a (3S)-3-hydroxy-3-methylglutaryl moiety at C-26 in the aglycone. Compounds 1-4 were evaluated in terms of their cytotoxic activities toward HL-60 human promyelocytic leukemia cells, A549 human lung adenocarcinoma cells, and SBC-3 human lung small cell carcinoma cells. Only 4 showed moderate cytotoxicity against HL-60, A549, and SBC-3 cells with IC50 values of 22.9, 13.3, and 11.9 µM, respectively. Compound 4 was found to cause necrotic-like cell death in HL-60 cells.
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Affiliation(s)
- Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Minpei Kuroda
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hiroshi Takayama
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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Yokosuka A, Inomata M, Yoshizawa Y, Iguchi T, Mimaki Y. Bufadienolides and ecdysteroids from the whole plants of Helleborus niger and their cytotoxicity. J Nat Med 2021; 75:393-402. [PMID: 33502658 DOI: 10.1007/s11418-021-01481-6] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 01/05/2021] [Indexed: 11/30/2022]
Abstract
A new bufadienolide (1), two new bufadienolide glycosides (2 and 3), a new ecdysteroid (4), and four known compounds (5-8), were isolated from the whole plants of Helleborus niger L. (Ranunculaceae). The structures of the new compounds (1-4) were determined by spectroscopic analysis, including 2D NMR spectral data, and hydrolytic studies. Compounds 1-6 showed cytotoxicity against HL-60 human leukemia cells, A549 human lung adenocarcinoma cells, and SBC-3 human small-cell lung cancer cells, with IC50 values ranging from 0.0055 to 1.9 µM. HL-60 cells treated with either 3 or 4 showed apoptosis characteristics, such as nuclear chromatin condensation, accumulation of sub-G1 cells, and activation of caspase-3/7.
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Affiliation(s)
- Akihito Yokosuka
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan.
| | - Mina Inomata
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yuka Yoshizawa
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
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Iguchi T, Kuroda M, Akiyama N, Hashimoto M, Mimaki Y. Chemical constituents and aldose reductase inhibitory activities of Betula alba bark and leaves. Nat Prod Res 2020; 36:1004-1008. [PMID: 33121272 DOI: 10.1080/14786419.2020.1839455] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Systematic phytochemical investigation of the bark and leaves of Betula alba was independently conducted. A new cyclic diarylheptanoid glucoside (1), five diarylheptanoids (2-6), a phenylethanoid (7), a methyl salicylate glycoside (8), a dihydrobenzofuran glucoside (9), an arylbutanoid glycoside (10), two lignan glycosides (11 and 12), a flavanone glucoside (13), and a triterpene (14) were isolated from the bark of B. alba. On the other hand, two cyclic diarylheptanoids (15 and 16), five flavonoids (17-21), a phenylpropanoid (22), a phenylbutanoid glucoside (23), and a monoterpene glucoside (24) were obtained from the leaves of B. alba. The structures of the isolated compounds (1-24) were identified on the basis of one- and two-dimensional NMR spectroscopic data. Compounds 1-24 were subsequently examined for aldose reductase (AR) inhibitory activity. Compounds 14 and 17-20 moderately inhibited AR activity with IC50 values ranging from 6.6 to 34 µM.
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Affiliation(s)
- Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo university of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Minpei Kuroda
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo university of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Nanami Akiyama
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo university of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Mariko Hashimoto
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo university of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo university of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
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Iguchi T, Takahashi N, Mimaki Y. A Total of Eight Novel Steroidal Glycosides Based on Spirostan, Furostan, Pseudofurostan, and Cholestane from the Leaves of Cestrum newellii. Molecules 2020; 25:molecules25194462. [PMID: 32998410 PMCID: PMC7582601 DOI: 10.3390/molecules25194462] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/16/2020] [Accepted: 09/26/2020] [Indexed: 11/16/2022] Open
Abstract
Previously, various steroidal glycosides were reported from plants of Cestrum species. However, phytochemical investigation has not been conducted on Cestrum newellii. A systematic phytochemical investigation of the leaves of C. newellii resulted in the isolation of eight novel steroidal glycosides (1-8), which were classified into three spirostanol glycosides (1-3), two furostanol glycosides (4 and 5), two pseudofurostanol glycosides (6 and 7), and one cholestane glycoside (8). In addition, three known cholestane glycosides (9-11) were isolated and identified. The structures of the new compounds were determined based on spectroscopic data and chemical transformations. Compounds 1 and 2 are spirostanol glycosides having hydroxy groups at C-2, C-3, C-12, and C-24 of the aglycone moiety. Although C. newellii is known to be a poisonous plant, the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide assay exhibited that none of the isolated compounds were cytotoxic to HL-60 human promyelocytic leukemia cells.
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Iguchi T, Yokosuka A, Tamura N, Takano S, Mimaki Y. Bufadienolide glycosides and bufadienolides from the whole plants of Helleborus lividus, and their cytotoxic activity. Phytochemistry 2020; 176:112415. [PMID: 32480062 DOI: 10.1016/j.phytochem.2020.112415] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 05/13/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
Cytotoxicity-guided fractionation of the MeOH extract of Helleborus lividus Aiton ex Curtis (Ranunculaceae) resulted in the isolation of five undescribed bufadienolide glycosides and two undescribed bufadienolides, along with three known compounds. Their structures were determined by detailed spectroscopic analysis and hydrolysis studies. The isolated compounds showed cytotoxicity against HL-60 human leukemia cells and A549 human lung adenocarcinoma cells, with IC50 values ranging from 2.20 ± 0.01 nM to 0.77 ± 0.01 μM. The undescribed compound 3β-[(O-β-d-glucopyranosyl-(1 → 4)-α-l-rhamnopyranosyl)oxy]-14β,16β-dihydroxy-5β-bufa-20,22-dienolide induced apoptosis in HL-60 cells via a mitochondria-dependent apoptotic pathway. The average IC50 values of bufadienolide monorhamnosides for HL-60 and A549 cells were 10-20 times lower than those for Na+/K+ ATPase, implying that they induce tumor cell death via a mechanism of action other than Na+/K+ ATPase inhibition.
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Affiliation(s)
- Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Akihito Yokosuka
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan.
| | - Naoya Tamura
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Shingo Takano
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
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14
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Kohjimoto Y, Higuchi M, Ueda Y, Iguchi T, Koike H, Wakamiya T, Yamashita S, Kikkawa K, Hara I. Intraoperative measurements of urethral length and bladder neck diameter as predictors of urinary continence after robot-assisted radical prostatectomy. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33779-4] [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: 11/27/2022] Open
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15
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Iguchi T, Yokosuka A, Kawahata R, Andou M, Mimaki Y. Bufadienolides from the whole plants of Helleborus foetidus and their cytotoxicity. Phytochemistry 2020; 172:112277. [PMID: 31991264 DOI: 10.1016/j.phytochem.2020.112277] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 01/14/2020] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Two undescribed bufadienolide glucosides and four undescribed bufadienolides were isolated from the whole plants of Helleborus foetidus (Ranunculaceae). Their structures were determined by extensive spectroscopic analysis and the results of hydrolytic cleavage. The isolated compounds exhibited cytotoxic activities against HL-60 and A549 cells with IC50 values ranging from 0.019 to 3.0 μM. The isolated compounds also showed the Na+/K+ ATPase inhibitory activity. The undescribed compound 16β-formyloxy-10,14-dihydroxy-5β-[(β-d-glucopyranosyl)oxy]-19-norbufa-3,20,22-trienolide induced apoptosis in HL-60 cells through a mitochondria-dependent apoptotic pathway.
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Affiliation(s)
- Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Akihito Yokosuka
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan.
| | - Riko Kawahata
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Madoka Andou
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
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16
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Sonnenschein V, Tsuji Y, Kokuryu S, Kubo W, Suzuki S, Tomita H, Kiyanagi Y, Iguchi T, Matsushita T, Wada N, Kitaguchi M, Shimizu HM, Hirota K, Shinohara T, Hiroi K, Hayashida H, Guo W, Ito D, Saito Y. An experimental setup for creating and imaging 4He 2 * excimer cluster tracers in superfluid helium-4 via neutron- 3He absorption reaction. Rev Sci Instrum 2020; 91:033318. [PMID: 32259963 DOI: 10.1063/1.5130919] [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] [Received: 10/08/2019] [Accepted: 02/29/2020] [Indexed: 06/11/2023]
Abstract
For the purpose of future visualization of the flow field in superfluid helium-4, clusters of the triplet state excimer 4He2 * are generated along the micro-scale recoil tracks of the neutron-absorption reaction n + 3He → 3T + p. This reaction is induced by neutron irradiation of the 3He fraction contained in natural isotopic abundance liquid helium with neutron beams either from the Japan Proton Accelerator Research Complex, Materials and Life Science Experimental Facility (JPARC)/Materials and Life Science Experimental Facility or from the Kyoto University Institute for Integrated Radiation and Nuclear Science. These 4He2 * clusters are expected to be ideal tracers of the normal-fluid component in superfluid helium with several advantageous properties. Evidence of the excimer generation is inferred by detection of laser induced fluorescence emitted from the 4He2 * clusters excited by a purpose-built short pulse gain-switched titanium:sapphire (Ti:sa) laser operating at a wavelength of 905 nm. The setup and performance characteristics of the laser system including the Ti:sa and two continuous wave re-pumping lasers are described. Detection at the fluorescence wavelength of 640 nm is performed by using optical bandpass filtered photomultiplier tubes (PMT). Electrical noise in the PMT acquisition traces could successfully be suppressed by post-processing with a simple algorithm. Despite other laser-related backgrounds, the excimer was clearly identified by its fluorescence decay characteristics. Production of the excimer was found to be proportional to the neutron flux, adjusted via insertion of different collimators into the neutron beam. These observations suggest that the apparatus we constructed does function in the expected manner and, therefore, has the potential for groundbreaking turbulence research with superfluid helium.
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Affiliation(s)
- V Sonnenschein
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Y Tsuji
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - S Kokuryu
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - W Kubo
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - S Suzuki
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - H Tomita
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Y Kiyanagi
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - T Iguchi
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - T Matsushita
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - N Wada
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - M Kitaguchi
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - H M Shimizu
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Hirota
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - T Shinohara
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Hiroi
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - H Hayashida
- Comprehensive Research Organization for Science and Society, Tokai, Ibaraki 319-1106, Japan
| | - W Guo
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
| | - D Ito
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
| | - Y Saito
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
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17
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Iguchi T, Uchida Y, Takano S, Yokosuka A, Mimaki Y. Novel Steroidal Glycosides from the Whole Plants of Helleborus foetidus. Chem Pharm Bull (Tokyo) 2020; 68:273-287. [DOI: 10.1248/cpb.c19-01037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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)
- Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Yuka Uchida
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Shingo Takano
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Akihito Yokosuka
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
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18
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Tatsuno S, Iguchi T, Kuroda M, Ishihara M, Sakagami H, Mimaki Y. A new and 23 known cardenolide glycosides from Thevetia neriifolia seeds and their cytotoxic activities against human oral carcinoma cell lines. Nat Prod Res 2020; 35:4388-4393. [PMID: 31967486 DOI: 10.1080/14786419.2020.1716352] [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: 10/25/2022]
Abstract
Phytochemical analysis of Thevetia neriifolia seeds resulted in the isolation of one new (1) and 23 known (2-24) cardenolide glycosides. The structure of 1 was determined based on one- and two-dimensional NMR spectroscopic analysis and acid hydrolytic cleavage reaction. The effect of the cytotoxic activity of 1-24 on three human oral carcinoma cell lines was assessed. The cell lines included Ca9-22 human gingival carcinoma cells, HSC-2 human mouth carcinoma cells, HSC-4 human tongue carcinoma cells, and HGF human gingival fibroblast cells. The isolated compounds had a cytotoxic effect on the carcinoma cells with IC50 values ranging from 0.004 μM to 64.9 μM. The structure-activity relationship is also discussed.
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Affiliation(s)
- Satoru Tatsuno
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Minpei Kuroda
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Mai Ishihara
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Hiroshi Sakagami
- Research Institute of Odontology (M-RIO), Meikai University, Sakado, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
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19
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Stenzl A, Szmulewitz R, Petrylak D, Holzbeierlein J, Villers A, Azad A, Alcaraz A, Alekseev B, Iguchi T, Shore N, Rosbrook B, Baron B, Kunieda F, Morlock R, Ramaswamy K, Armstrong A. ARCHES–efficacité du traitement par suppression androgénique en association avec l’enzalutamide ou placebo dans le cancer de la prostate hormono-sensible métastatique : résultats de l’antigène spécifique de la prostate (PSA). Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.141] [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: 10/25/2022]
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20
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Matsui Y, Hiraki T, Gobara H, Iguchi T, Tomita K, Uka M, Araki M, Nasu Y, Furuya M, Kanazawa S. Percutaneous thermal ablation for renal cell carcinoma in patients with Birt–Hogg–Dubé syndrome. Diagn Interv Imaging 2019; 100:671-677. [DOI: 10.1016/j.diii.2019.06.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/16/2019] [Accepted: 06/20/2019] [Indexed: 01/29/2023]
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21
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Stenzl A, Szmulewitz R, Petrylak D, Holzbeierlein J, Villers A, Azad A, Alcaraz A, Alekseev B, Iguchi T, Shore N, Rosbrook B, Baron B, Haas G, Morlock R, Ramaswamy K, Armstrong A. ARCHES - The role of androgen deprivation therapy (ADT) with enzalutamide (ENZA) or placebo (PBO) in metastatic hormone-sensitive prostate cancer (mHSPC): Post hoc analyses of high and low disease volume and risk groups. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz248.010] [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: 11/13/2022] Open
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22
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Fukumoto K, Takemoto Y, Yoshikawa J, Norioka N, Iguchi T, Yoshiyama M, Shuto T. P6205Increase in EPA/AA Ratio Predicts Improvement in Endothelial Function in Purified Eicosapentaenoic Acid-Treated Patients. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Omega-3 polyunsaturated fatty acids (n-3 PUFAs) are well-known for preventing cardiovascular disease. Among n-3 PUFAs, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) play key roles in preventing cardiovascular diseases. However, the effects of n-3 PUFAs have been examined under conditions of simultaneous administration of EPA and DHA in the majority of clinical investigations and the effect of purified EPA is still controversial. EPA has been reported to improve endothelial dysfunction. Although several mechanisms underlying the effects of EPA on endothelial function have been demonstrated such as the modulation of lipid metabolism including increases in high-density lipoprotein (HDL) and/or decreases in triglyceride (TG) levels, decreases in cytokine production, and inhibition of inflammatory processes, the main mechanisms ameliorating endothelial function have not been fully determined.
Purpose
We sought to clarify the main factors associated with EPA administration that led to improved endothelial function.
Methods
Fifty-one consecutive patients with hypertriglyceridemia (mean ± SD age, 60±13 years) with no evidence of coronary artery disease (CAD) were prospectively enrolled and administered purified EPA (1800 mg/day). Forty-eight patients who were not administered EPA were enrolled as age- and sex-matched controls. Clinical variables such as body mass index, HbA1c, fasting glucose level, HDL, low-density lipoprotein, TG, systolic blood pressure, diastolic blood pressure, heart rate, interleukin-6, baseline diameter of the brachial artery, intima-media thickness of the brachial artery, and flow-mediated dilation (FMD) were examined before and after 6 months of treatment. Univariate and multivariate regression analyses were performed to examine the associations between FMD changes and clinical variables.
Results
FMD was significantly improved from 4.16% ± 1.88% to 6.30% ± 2.24% (p<0.0001) in the EPA group. The change in FMD was positively correlated with the change in EPA/arachidonic acid (AA) ratio (r=0.34, p=0.014). The multivariate regression analysis showed that the change in EPA/AA ratio alone was significantly associated with the change in FMD (p=0.010).
Conclusions
EPA treatment improves endothelial dysfunction in patients with hypertriglyceridemia without evidence of CAD. The change in FMD was associated with the change in EPA/AA ratio alone. These finding suggest that a direct effect of EPA on the endothelium may be the predominant factor ameliorating endothelial function.
Acknowledgement/Funding
This study was supported, in part, by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan (15K08649).
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Affiliation(s)
- K Fukumoto
- Osaka City University Graduate School of Medicine, Department of Medical Education and General Practice, Osaka, Japan
| | - Y Takemoto
- Osaka City University Graduate School of Medicine, Department of Medical Education and General Practice, Osaka, Japan
| | - J Yoshikawa
- Osaka City University Graduate School of Medicine, Department of Medical Education and General Practice, Osaka, Japan
| | - N Norioka
- Osaka City University Graduate School of Medicine, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Iguchi
- Bell land General Hospital, Department of Cardiovascular Medicine, Osaka, Japan
| | - M Yoshiyama
- Osaka City University Graduate School of Medicine, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Shuto
- Osaka City University Graduate School of Medicine, Department of Medical Education and General Practice, Osaka, Japan
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23
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Abstract
A new withanolide glycoside (1), two new ergostanol glycosides (2 and 3), and a new furostanol glycoside (4), along with nine known steroidal derivatives (5-12) were isolated from the seeds of Withania somnifera. The structures of the new compounds were determined using spectroscopic analysis and hydrolysis. The cytotoxic activities of the isolated compounds were evaluated against Ca9-22 human gingival carcinoma cells, HSC-2 human mouth carcinoma cells, and HL-60 human promyelocytic leukemia cells. Only 12 exhibited cytotoxic activity against these cell lines with IC50 values of 0.38, 0.54, and 1.5 μM, respectively.
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Affiliation(s)
- Tomoki Iguchi
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Minpei Kuroda
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Mai Ishihara
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hiroshi Sakagami
- Research Institute of Odontology (M-RIO), Meikai University, Saitama, Japan
| | - Yoshihiro Mimaki
- Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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24
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Tao WK, Iguchi T, Lang S. Expanding the Goddard CSH Algorithm for GPM: New Extratropical Retrievals. J Appl Meteorol Climatol 2019; 58:921-946. [PMID: 32636716 PMCID: PMC7340152 DOI: 10.1175/jamc-d-18-0215.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The Goddard Convective-Stratiform Heating (CSH) algorithm has been used to retrieve latent heating (LH) associated with clouds and cloud systems in support of the Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Measurement (GPM) mission. The CSH algorithm required the use of a cloud-resolving model (CRM) to simulate LH profiles to build look-up tables (LUTs). However, the current LUTs in the CSH algorithm are not suitable for retrieving LH profiles at high latitudes or winter conditions that are needed for GPM. The NASA Unified-Weather Research and Forecasting (NU-WRF) model is used to simulate three eastern continental US (CONUS) synoptic winter and three western coastal/offshore events. The relationship between LH structures (or profiles) and other precipitation properties (radar reflectivity, freezing level height, echo-top height, maximum radar reflectivity height and surface precipitation rate) is examined, and a new classification system is adopted with varying ranges for each of these precipitation properties to create LUTs representing high latitude/winter conditions. The performance of the new LUTs is examined using a self-consistency check for one CONUS and one West Coast offshore event by comparing LH profiles retrieved from the LUTs using model-simulated precipitation properties with those originally simulated by the model. The results of the self-consistency check validate the new classification and LUTs. High latitude retrievals from the new LUTs are merged with those from the CSH algorithm to retrieve LH profiles over the GPM domain using precipitation properties retrieved from the GPM combined algorithm.
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Affiliation(s)
- W-K Tao
- Mesoscale Atmospheric Processes Laboratory NASA/Goddard Space Flight Center Greenbelt, MD 20771
| | - T Iguchi
- Mesoscale Atmospheric Processes Laboratory NASA/Goddard Space Flight Center Greenbelt, MD 20771
- Earth System Science Interdisciplinary Center University of Maryland College Park, MD
| | - S Lang
- Mesoscale Atmospheric Processes Laboratory NASA/Goddard Space Flight Center Greenbelt, MD 20771
- Science Systems and Applications, Inc. Lanham, MD 20706
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Tanaka T, Inai R, Iguchi T, Yanai H, Kanazawa S. Dermoid cyst presenting as an intramuscular mass: CT and MRI features. Diagn Interv Imaging 2018; 100:195-196. [PMID: 30579768 DOI: 10.1016/j.diii.2018.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 11/30/2018] [Accepted: 12/05/2018] [Indexed: 11/25/2022]
Affiliation(s)
- T Tanaka
- Department of Radiology, Okayama University Hospital, 2-5-1 Shikata-cho kita-ku, Okayama, 700-8558, Japan.
| | - R Inai
- Department of Radiology, Okayama University Hospital, 2-5-1 Shikata-cho kita-ku, Okayama, 700-8558, Japan
| | - T Iguchi
- Department of Radiology, Okayama University Hospital, 2-5-1 Shikata-cho kita-ku, Okayama, 700-8558, Japan
| | - H Yanai
- Department of Pathology, Okayama University Hospital, 2-5-1 Shikata-cho kita-ku, Okayama, 700-8558, Japan
| | - S Kanazawa
- Department of Radiology, Okayama University Hospital, 2-5-1 Shikata-cho kita-ku, Okayama, 700-8558, Japan
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26
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Iguchi T, Hiraki T, Matsui Y, Fujiwara H, Masaoka Y, Uka M, Gobara H, Toyooka S, Kanazawa S. Short hookwire placement under imaging guidance before thoracic surgery: A review. Diagn Interv Imaging 2018; 99:591-597. [DOI: 10.1016/j.diii.2018.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/20/2018] [Accepted: 04/03/2018] [Indexed: 10/17/2022]
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27
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Iguchi T, Ohkubo M, Sugiyama T, Hori K, Ono T, Ishida R. Effects of water viscosity and tongue ingestion site on tongue pressure during food bolus propulsion. J Oral Rehabil 2018. [DOI: 10.1111/joor.12623] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. Iguchi
- Department of Oral Health & Clinical Science; Division of Dysphagia Rehabilitation; Tokyo Dental College; Tokyo Japan
| | - M. Ohkubo
- Department of Oral Health & Clinical Science; Division of Dysphagia Rehabilitation; Tokyo Dental College; Tokyo Japan
| | - T. Sugiyama
- Department of Oral Health & Clinical Science; Division of Dysphagia Rehabilitation; Tokyo Dental College; Tokyo Japan
| | - K. Hori
- Divisions of Comprehensive Prosthodontics; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - T. Ono
- Divisions of Comprehensive Prosthodontics; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - R. Ishida
- Department of Oral Health & Clinical Science; Division of Dysphagia Rehabilitation; Tokyo Dental College; Tokyo Japan
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28
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Yokosuka A, Iguchi T, Mimaki Y. New bufadienolides from the whole plants of Helleborus foetidus and their apoptosis-inducing activity. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608068] [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: 10/18/2022]
Affiliation(s)
- A Yokosuka
- Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - T Iguchi
- Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Y Mimaki
- Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
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29
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Sugiyama K, Kanda K, Iwasaki S, Nakazawa M, Hashikura H, Iguchi T, Sekimoto H, Itoh S, Sumita K, Takahashi A, Yamamoto J. Integral Experiments in a 120-cm Lithium Sphere. ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst85-a39977] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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)
- K. Sugiyama
- Tohoku University Department of Nuclear Engineering Aramaki-Aoba, Sendai 980, Japan (0222) 22-1800
| | - K. Kanda
- Tohoku University Department of Nuclear Engineering Aramaki-Aoba, Sendai 980, Japan (0222) 22-1800
| | - S. Iwasaki
- Tohoku University Department of Nuclear Engineering Aramaki-Aoba, Sendai 980, Japan (0222) 22-1800
| | - M. Nakazawa
- University of Tokyo Nuclear Engineering Research Laboratory Tokai-mura, Ibaraki-ken, 319-11, Japan (0292) 82-1611
| | - H. Hashikura
- University of Tokyo Nuclear Engineering Research Laboratory Tokai-mura, Ibaraki-ken, 319-11, Japan (0292) 82-1611
| | - T. Iguchi
- University of Tokyo Department of Nuclear Engineering Hongo, Bunkyo-ku, Tokyo 113, Japan (03) 812-2111
| | - H. Sekimoto
- Tokyo Institute of Technology Research Laboratory of Nuclear Reactors O-okayama, Meguro-ku, Tokyo 152, Japan (03) 726-1111
| | - S. Itoh
- Nagoya University Department of Nuclear EngineeringFuro-cho, Chikusa-ku, Nagoya 464, Japan (052) 781-5111
| | - K. Sumita
- Osaka University Department of Nuclear EngineeringYamadaoka, Suita, Osaka 565, Japan (06) 877-5111
| | - A. Takahashi
- Osaka University Department of Nuclear EngineeringYamadaoka, Suita, Osaka 565, Japan (06) 877-5111
| | - J. Yamamoto
- Osaka University Department of Nuclear EngineeringYamadaoka, Suita, Osaka 565, Japan (06) 877-5111
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Iguchi T, Kuroda M, Naito R, Watanabe T, Matsuo Y, Yokosuka A, Mimaki Y. Structural Characterization of Cholestane Rhamnosides from Ornithogalum saundersiae Bulbs and Their Cytotoxic Activity against Cultured Tumor Cells. Molecules 2017; 22:molecules22081243. [PMID: 28757596 PMCID: PMC6152286 DOI: 10.3390/molecules22081243] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/14/2017] [Accepted: 07/17/2017] [Indexed: 11/16/2022] Open
Abstract
Previous phytochemical studies of the bulbs of Ornithogalum saundersiae, an ornamental perennial plant native to South Africa, resulted in the isolation of 29 new cholestane glycosides, some of which were structurally unique and showed potent cytotoxic activity against cultured tumor cell lines. Therefore, we aimed to perform further phytochemical examinations of methanolic extracts obtained from Ornithogalum saundersiae bulbs, isolating 12 new cholestane rhamnosides (1-12) and seven known compounds (13-19). The structures of the new compounds (1-12) were identified via NMR-based structural characterization methods, and through a sequence of chemical transformations followed by spectroscopic and chromatographic analysis. The cytotoxic activity of the isolated compounds (1-19) and the derivatives (1a and 6a) against HL-60 human promyelocytic leukemia cells and A549 human lung adenocarcinoma cells was evaluated. Compounds 10-12, 16, and 17 showed cytotoxicity against both HL-60 and A549 cells. Compound 11 showed potent cytotoxicity with an IC50 value of 0.16 µM against HL-60 cells and induced apoptotic cell death via a mitochondrion-independent pathway.
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Affiliation(s)
- Tomoki Iguchi
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Minpei Kuroda
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Rei Naito
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Tomoyuki Watanabe
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Yukiko Matsuo
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Akihito Yokosuka
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Yoshihiro Mimaki
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
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Iguchi T, Hiraki T, Gobara H, Fujiwara H, Sakurai J, Matsui Y, Mitsuhashi T, Toyooka S, Kanazawa S. Radiofrequency ablation of pulmonary tumors near the diaphragm. Diagn Interv Imaging 2017; 98:535-541. [PMID: 28236589 DOI: 10.1016/j.diii.2017.01.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 11/26/2016] [Revised: 01/07/2017] [Accepted: 01/11/2017] [Indexed: 01/20/2023]
Abstract
PURPOSE To retrospectively evaluate the feasibility, safety, and efficacy of radiofrequency ablation (RFA) of lung tumors located near the diaphragm. MATERIALS AND METHODS A total of 26 patients (15 men, 11 women; mean age, 61.5 years±13.0 [SD]) with a total of 29 lung tumors near the diaphragm (i.e., distance<10mm) were included. Mean tumor diameter was 11.0mm±5.3 (SD) (range, 2-23mm). Efficacy of RFA, number of adverse events and number of adverse events with a grade≥3, based on the National Cancer Institute Common Terminology Criteria for Adverse Events, version 4.0, were compared between patients with lung tumors near the diaphragm and a control group of patients with more distally located lung tumors (i.e., distance≥10mm). RESULTS RFA was technically feasible for all tumors near the diaphragm. Four grade 3 adverse events (1 pneumothorax requiring pleurodesis and 3 phrenic nerve injuries) were observed. No grade≥4 adverse events were reported. The median follow-up period for tumors near the diaphragm was 18.3 months. Local progression was observed 3.3 months after RFA in 1 tumor. The technique efficacy rates were 96.2% at 1 year and 96.2% at 2 years and were not different, from those observed in control subjects (186 tumors; P=0.839). Shoulder pain (P<0.001) and grade 1 pleural effusion (P<0.001) were more frequently observed in patients with lung tumor near the diaphragm. The rates of grade≥3 adverse events did not significantly differ between tumors near the diaphragm (4/26 sessions) and the controls (7/133 sessions) (P=0.083). CONCLUSION RFA is a feasible and effective therapeutic option for lung tumors located near the diaphragm. However, it conveys a higher rate of shoulder pain and asymptomatic pleural effusion by comparison with more distant lung tumors.
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Affiliation(s)
- T Iguchi
- Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - T Hiraki
- Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - H Gobara
- Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - H Fujiwara
- Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - J Sakurai
- Center for Innovative Clinical Medicine, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - Y Matsui
- Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - T Mitsuhashi
- Center for Innovative Clinical Medicine, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - S Toyooka
- Department of General Thoracic Surgery, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan; Department of Clinical Genomic Medicine, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
| | - S Kanazawa
- Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, kita-ku, Okayama 700-8558, Japan.
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Iguchi T, Hiraki T, Tomita K, Gobara H, Fujiwara H, Sakurai J, Matsui Y, Kanazawa S. Simultaneous biopsy and radiofrequency ablation of T1a renal cell carcinoma. Diagn Interv Imaging 2016; 97:1159-1164. [DOI: 10.1016/j.diii.2016.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 04/24/2016] [Accepted: 05/02/2016] [Indexed: 12/18/2022]
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Izumi Y, Tomita H, Nakayama Y, Hayashi S, Morishima K, Isobe M, Cheon MS, Ogawa K, Nishitani T, Naka T, Nakano T, Nakamura M, Iguchi T. Development of fast neutron pinhole camera using nuclear emulsion for neutron emission profile measurement in KSTAR. Rev Sci Instrum 2016; 87:11D840. [PMID: 27910454 DOI: 10.1063/1.4963866] [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: 06/06/2023]
Abstract
We have developed a compact fast neutron camera based on a stack of nuclear emulsion plates and a pinhole collimator. The camera was installed at J-port of Korea superconducting tokamak advanced research at National Fusion Research Institute, Republic of Korea. Fast neutron images agreed better with calculated ones based on Monte Carlo neutron simulation using the uniform distribution of Deuterium-Deuterium (DD) neutron source in a torus of 40 cm radius.
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Affiliation(s)
- Y Izumi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Nakayama
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - S Hayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - K Morishima
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Isobe
- National Insutitute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M S Cheon
- Diagnostics Technology Team, ITER Korea, National Fusion Reseach Institute, Daegeon 305-333, South Korea
| | - K Ogawa
- National Insutitute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Nishitani
- National Insutitute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Naka
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Nakano
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Nakamura
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Iguchi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Iguchi T, Inoue D, Tatsukawa M, Yabushita K, Sakaguchi K, Kanazawa S. Transpulmonary radiofrequency ablation of hepatocellular carcinoma contiguous to the heart. Diagn Interv Imaging 2015; 96:1207-9. [PMID: 26277644 DOI: 10.1016/j.diii.2015.06.016] [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] [Received: 06/01/2015] [Revised: 06/13/2015] [Accepted: 06/15/2015] [Indexed: 11/16/2022]
Affiliation(s)
- T Iguchi
- Department of Diagnostic and Interventional Radiology, Fukuyama City Hospital, 5-23-1 Zao-cho, Fukuyama 721-8511, Japan; Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, Okayama 700-8558, Japan.
| | - D Inoue
- Department of Diagnostic and Interventional Radiology, Fukuyama City Hospital, 5-23-1 Zao-cho, Fukuyama 721-8511, Japan.
| | - M Tatsukawa
- Department of Internal Medicine, Fukuyama City Hospital, 5-23-1 Zao-cho, Fukuyama 721-8511, Japan.
| | - K Yabushita
- Department of Internal Medicine, Fukuyama City Hospital, 5-23-1 Zao-cho, Fukuyama 721-8511, Japan.
| | - K Sakaguchi
- Department of Internal Medicine, Fukuyama City Hospital, 5-23-1 Zao-cho, Fukuyama 721-8511, Japan.
| | - S Kanazawa
- Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, Okayama 700-8558, Japan.
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Yoshizumi T, Itoh S, Imai D, Ikegami T, Ninomiya M, Iguchi T, Harimoto N, Takeishi K, Kimura Y, Uchiyama H, Soejima Y, Ikeda T, Kawanaka H, Shirabe K, Maehara Y. Impact of Platelets and Serotonin on Liver Regeneration After Living Donor Hepatectomy. Transplant Proc 2015; 47:683-5. [DOI: 10.1016/j.transproceed.2014.11.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 10/29/2014] [Accepted: 11/18/2014] [Indexed: 12/13/2022]
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Sugimachi K, Matsumura T, Hirata H, Uchi R, Ueda M, Ueo H, Shinden Y, Iguchi T, Eguchi H, Shirabe K, Ochiya T, Maehara Y, Mimori K. Identification of a bona fide microRNA biomarker in serum exosomes that predicts hepatocellular carcinoma recurrence after liver transplantation. Br J Cancer 2015; 112:532-8. [PMID: 25584485 PMCID: PMC4453648 DOI: 10.1038/bjc.2014.621] [Citation(s) in RCA: 230] [Impact Index Per Article: 25.6] [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: 07/24/2014] [Revised: 11/19/2014] [Accepted: 11/26/2014] [Indexed: 12/17/2022] Open
Abstract
Background Predictive biomarkers for the recurrence of hepatocellular carcinoma (HCC) have great benefit in the selection of treatment options, including liver transplantation (LT), for HCC. The purpose of this study was to identify specific microRNAs (miRs) in exosomes from the serum of patients with recurrent HCC and to validate these molecules as novel biomarkers for HCC recurrence. Methods We employed microarray-based expression profiling of miRs derived from exosomes in the serum of HCC patients to identify a biomarker that distinguishes between patients with and without HCC recurrence after LT. This was followed by the validation in a separate cohort of 59 HCC patients who underwent living related LT. The functions and potential gene targets of the recurrence-specific miRs were analysed using a database, clinical samples and HCC cell lines. Results We found that miR-718 showed significantly different expression in the serum exosomes of HCC cases with recurrence after LT compared with those without recurrence. Decreased expression of miR-718 was associated with HCC tumour aggressiveness in the validated cohort series. We identified HOXB8 as a potential target gene of miR-718, and its upregulation was associated with poor prognosis. Conclusion Circulating miRs in serum exosomes have potential as novel biomarkers for predicting HCC recurrence.
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Affiliation(s)
- K Sugimachi
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - T Matsumura
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - H Hirata
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - R Uchi
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - M Ueda
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - H Ueo
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - Y Shinden
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - T Iguchi
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - H Eguchi
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
| | - K Shirabe
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - T Ochiya
- Group for Research of Molecular Functions and Targets, Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
| | - Y Maehara
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - K Mimori
- Department of Surgery, Kyushu University Beppu Hospital, 4546 Tsurumihara, Beppu 874-0838, Japan
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Uchida Y, Takada E, Fujisaki A, Isobe M, Ogawa K, Shinohara K, Tomita H, Kawarabayashi J, Iguchi T. A study on fast digital discrimination of neutron and gamma-ray for improvement neutron emission profile measurement. Rev Sci Instrum 2014; 85:11E118. [PMID: 25430297 PMCID: PMC4137813 DOI: 10.1063/1.4891711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 07/18/2014] [Indexed: 06/04/2023]
Abstract
Neutron and γ-ray (n-γ) discrimination with a digital signal processing system has been used to measure the neutron emission profile in magnetic confinement fusion devices. However, a sampling rate must be set low to extend the measurement time because the memory storage is limited. Time jitter decreases a discrimination quality due to a low sampling rate. As described in this paper, a new charge comparison method was developed. Furthermore, automatic n-γ discrimination method was examined using a probabilistic approach. Analysis results were investigated using the figure of merit. Results show that the discrimination quality was improved. Automatic discrimination was applied using the EM algorithm and k-means algorithm.
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Affiliation(s)
- Y Uchida
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - E Takada
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - A Fujisaki
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - M Isobe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Shinohara
- Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0913, Japan
| | - H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - J Kawarabayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Iguchi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Tomita H, Yamashita F, Nakayama Y, Morishima K, Yamamoto Y, Sakai Y, Cheon MS, Isobe M, Ogawa K, Hayashi S, Kawarabayashi J, Iguchi T. Progress in development of neutron energy spectrometer for deuterium plasma operation in KSTAR. Rev Sci Instrum 2014; 85:11E120. [PMID: 25430299 DOI: 10.1063/1.4893004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two types of DD neutron energy spectrometer (NES) are under development for deuterium plasma operation in KSTAR to understand behavior of beam ions in the plasma. One is based on the state-of-the-art nuclear emulsion technique. The other is based on a coincidence detection of a recoiled proton and a scattered neutron caused by an elastic scattering of an incident DD neutron, which is called an associated particle coincidence counting-NES. The prototype NES systems were installed at J-port in KSTAR in 2012. During the 2012 and 2013 experimental campaigns, multiple shots-integrated neutron spectra were preliminarily obtained by the nuclear emulsion-based NES system.
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Affiliation(s)
- H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - F Yamashita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Nakayama
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - K Morishima
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Yamamoto
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Sakai
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M S Cheon
- Diagnostics Technology Team, ITER Korea, National Fusion Research Institute, Daejeon 305-333, Republic of Korea
| | - M Isobe
- The Graduate University for Advanced Studies, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Hayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - J Kawarabayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Iguchi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Kawanaka H, Akahoshi T, Kinjo N, Iguchi T, Ninomiya M, Yamashita YI, Ikegami T, Yoshizumi T, Shirabe K, Maehara Y. Effect of laparoscopic splenectomy on portal haemodynamics in patients with liver cirrhosis and portal hypertension. Br J Surg 2014; 101:1585-93. [PMID: 25200126 DOI: 10.1002/bjs.9622] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 06/11/2014] [Accepted: 06/27/2014] [Indexed: 01/06/2023]
Abstract
BACKGROUND The effect of splenomegaly in patients with liver cirrhosis and portal hypertension is not fully understood. This study was designed to determine the effect of laparoscopic splenectomy on portal haemodynamics in these patients. METHODS Patients with liver cirrhosis and portal hypertension who underwent laparoscopic splenectomy in Kyushu University Hospital from January 2006 to March 2009 were evaluated retrospectively. Correlations between splenic size and portal haemodynamics, and changes in portal haemodynamics and in levels of the vasoactive agents endothelin (ET) 1 and nitric oxide metabolites (NOx) before and 7-10 days after laparoscopic splenectomy were analysed. RESULTS Portal venous (PV) blood flow, PV cross-sectional area and PV congestion index correlated significantly with splenic size (P < 0·050). All three were significantly reduced following splenectomy in 59 patients. The hepatic venous pressure gradient, measured in 18 patients, decreased by 25 per cent after splenectomy (P < 0·001). Portal vascular resistance was also reduced, by 21 per cent (P = 0·009). The peripheral blood concentration of ET-1 decreased from 2·95 to 2·11 pg/ml (P < 0·001), and that of NOx tended to decrease (from 29·2 to 25·0 pg/ml; P = 0·068). In hepatic venous blood, the level of ET-1 decreased from 2·37 to 1·83 pg/ml (P = 0·006), whereas NOx concentration tended to increase (from 24·5 to 30·9 pg/ml; P = 0·067). CONCLUSION In patients with liver cirrhosis and portal hypertension, splenectomy reduced portal venous pressure. A decrease in splanchnic blood flow, by eliminating splenic blood flow, and reduction in intrahepatic vascular resistance, by normalizing hepatic concentrations of ET-1 and NOx, may both have contributed.
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Affiliation(s)
- H Kawanaka
- Department of Surgery and Multidisciplinary Treatment, Kyushu University, Fukuoka, Japan; Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Matsui Y, Hiraki T, Gobara H, Fujiwara H, Iguchi T, Kanazawa S. Percutaneous radiofrequency ablation for pulmonary metastases from esophageal cancer: retrospective evaluation of 21 patients. J Vasc Interv Radiol 2014. [DOI: 10.1016/j.jvir.2013.12.446] [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: 10/25/2022] Open
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Iguchi T, Shirabe K, Ikegami T, Yoshizumi T, Hayashi H, Ninomiya M, Yamashita Y, Maehara Y. New Pathological Stratification in Microvascular Invasion of Hepatocellular Carcinoma is a Novel Prognostic Predictor after Living-donor Liver Transplantation. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abu-Zayyad T, Aida R, Allen M, Anderson R, Azuma R, Barcikowski E, Belz JW, Bergman DR, Blake SA, Cady R, Cheon BG, Chiba J, Chikawa M, Cho EJ, Cho WR, Fujii H, Fujii T, Fukuda T, Fukushima M, Gorbunov D, Hanlon W, Hayashi K, Hayashi Y, Hayashida N, Hibino K, Hiyama K, Honda K, Iguchi T, Ikeda D, Ikuta K, Inoue N, Ishii T, Ishimori R, Ivanov D, Iwamoto S, Jui CCH, Kadota K, Kakimoto F, Kalashev O, Kanbe T, Kasahara K, Kawai H, Kawakami S, Kawana S, Kido E, Kim HB, Kim HK, Kim JH, Kim JH, Kitamoto K, Kitamura S, Kitamura Y, Kobayashi K, Kobayashi Y, Kondo Y, Kuramoto K, Kuzmin V, Kwon YJ, Lan J, Lim SI, Machida S, Martens K, Matsuda T, Matsuura T, Matsuyama T, Matthews JN, Minamino M, Miyata K, Murano Y, Myers I, Nagasawa K, Nagataki S, Nakamura T, Nam SW, Nonaka T, Ogio S, Ohnishi M, Ohoka H, Oki K, Oku D, Okuda T, Oshima A, Ozawa S, Park IH, Pshirkov MS, Rodriguez DC, Roh SY, Rubtsov GI, Ryu D, Sagawa H, Sakurai N, Sampson AL, Scott LM, Shah PD, Shibata F, Shibata T, Shimodaira H, Shin BK, Shin JI, Shirahama T, Smith JD, Sokolsky P, Stokes BT, Stratton SR, Stroman T, Suzuki S, Takahashi Y, Takeda M, Taketa A, Takita M, Tameda Y, Tanaka H, Tanaka K, Tanaka M, Thomas SB, Thomson GB, Tinyakov P, Tkachev I, Tokuno H, Tomida T, Troitsky S, Tsunesada Y, Tsutsumi K, Tsuyuguchi Y, Uchihori Y, Udo S, Ukai H, Vasiloff G, Wada Y, Wong T, Wood M, Yamakawa Y, Yamane R, Yamaoka H, Yamazaki K, Yang J, Yoneda Y, Yoshida S, Yoshii H, Zhou X, Zollinger R, Zundel Z. Upper limit on the flux of photons with energies above1019 eVusing the Telescope Array surface detector. Int J Clin Exp Med 2013. [DOI: 10.1103/physrevd.88.112005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kakuta H, Matsushita A, Arikawa K, Iguchi T, Sato T. Cholesterol Homeostasis in the Ovaries of Neonatally Diethylstilbestrol-treated Mice. Exp Clin Endocrinol Diabetes 2013; 121:94-101. [DOI: 10.1055/s-0033-1333780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- H. Kakuta
- International Graduate School of Arts and Sciences, Yokohama City University, Yokohama, Japan
| | - A. Matsushita
- School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Japan
| | - K. Arikawa
- School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Japan
| | - T. Iguchi
- The Graduate University for Advanced Studies and Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Japan
| | - T. Sato
- International Graduate School of Arts and Sciences, Yokohama City University, Yokohama, Japan
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Kojima M, Miura T, Furukawa K, Hyakusoku Y, Ishikiri T, Kai H, Iguchi T, Hanado H, Nakagawa K. Dual-frequency precipitation radar (DPR) development on the global precipitation measurement (GPM) core observatory. ACTA ACUST UNITED AC 2012. [DOI: 10.1117/12.976823] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Tyler C, Hamilton P, Lange A, Filby A, Soffkar M, Lee O, Takesono A, Kudoh T, Paull G, Iguchi T. Health impacts of exposure to environmental oestrogens in fish. Comp Biochem Physiol A Mol Integr Physiol 2012. [DOI: 10.1016/j.cbpa.2012.05.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Iguchi T, Inoue D, Yabushita K, Sakaguchi K, Tatsukawa M, Sasaki H, Kanazawa S. Effect of CT fluoroscopy-guided transpulmonary radiofrequency ablation of liver tumours on the lung. Br J Radiol 2012; 85:e373-7. [PMID: 22374277 DOI: 10.1259/bjr/34646739] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE We retrospectively evaluated the effect of transpulmonary radiofrequency ablation (RFA) of liver tumours on the lung. METHODS 16 patients (10 males and 6 females; mean age, 65.2 years) with 16 liver tumours (mean diameter 1.5 cm) underwent transpulmonary RFA under CT fluoroscopic guidance. The tumours were either hepatocellular carcinoma (n=14) or liver metastasis (n=12). All 16 liver tumours were undetectable with ultrasonography. The pulmonary function values at 3 months after transpulmonary RFA were compared with baseline (i.e. values before RFA). RESULTS In 8 of 16 sessions, minor pulmonary complications occurred, including small pneumothorax (n=8) and small pleural effusion (n=1). In two sessions, major pulmonary complications occurred, including pneumothorax requiring a chest tube (n=2). These chest tubes were removed at 4 and 6 days, and these patients were discharged 7 and 10 days after RFA, respectively, without any sequelae. The pulmonary function values we evaluated were forced expiratory volume in 1 s (FEV1.0) and vital capacity (VC). The mean values of FEV1.0 before and 3 months after RFA were 2.55 l and 2.59 l, respectively; the mean values of VC before and 3 months after RFA were 3.20 l and 3.27 l, respectively. These pulmonary values did not show any significant worsening (p=0.393 and 0.255 for FEV1.0 and VC, respectively). CONCLUSION There was no significant lung injury causing a fatal or intractable complication after transpulmonary RFA of liver tumours.
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Affiliation(s)
- T Iguchi
- Department of Diagnostic and Interventional Radiology, Fukuyama City Hospital, Fukuyama, Japan.
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Tano S, Tanaka K, Iguchi T, Nishikawa K, Takayama R, Ninomiya K, Inoue H, Katsurahara M, Horiki N, Takei Y. Large retention cyst with chondromatous metaplasia in the esophagus. Endoscopy 2011; 43 Suppl 2 UCTN:E262-3. [PMID: 21837606 DOI: 10.1055/s-0030-1256531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S Tano
- Department of Gastroenterology, Mie University Hospital, Tsu, Japan
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Yoshikawa A, Yanagida T, Yokota Y, Kamada K, Kawaguchi N, Fukuda K, Yamazaki A, Watanabe K, Uritani A, Iguchi T, Boulon G, Nikl M. Development of novel rare earth doped fluoride and oxide scintillators for two-dimensional imaging. J RARE EARTH 2011. [DOI: 10.1016/s1002-0721(10)60621-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Uchida J, Machida Y, Iwai T, Naganuma T, Kitamoto K, Iguchi T, Maeda S, Kamada Y, Kuwabara N, Kim T, Nakatani T. Desensitization Protocol in Highly HLA-Sensitized and ABO-Incompatible High Titer Kidney Transplantation. Transplant Proc 2010; 42:3998-4002. [DOI: 10.1016/j.transproceed.2010.09.043] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 09/09/2010] [Indexed: 10/18/2022]
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