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Chen Q, Wu J, Li X, Ye Z, Yang H, Mu L. Amphibian-Derived Natural Anticancer Peptides and Proteins: Mechanism of Action, Application Strategies, and Prospects. Int J Mol Sci 2023; 24:13985. [PMID: 37762285 PMCID: PMC10530844 DOI: 10.3390/ijms241813985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 07/30/2023] [Accepted: 08/01/2023] [Indexed: 09/29/2023] Open
Abstract
Cancer is one of the major diseases that seriously threaten human life. Traditional anticancer therapies have achieved remarkable efficacy but have also some unavoidable side effects. Therefore, more and more research focuses on highly effective and less-toxic anticancer substances of natural origin. Amphibian skin is rich in active substances such as biogenic amines, alkaloids, alcohols, esters, peptides, and proteins, which play a role in various aspects such as anti-inflammatory, immunomodulatory, and anticancer functions, and are one of the critical sources of anticancer substances. Currently, a range of natural anticancer substances are known from various amphibians. This paper aims to review the physicochemical properties, anticancer mechanisms, and potential applications of these peptides and proteins to advance the identification and therapeutic use of natural anticancer agents.
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Affiliation(s)
| | | | | | | | - Hailong Yang
- Faculty of Basic Medical Sciences, Kunming Medical University, Kunming 650500, China
| | - Lixian Mu
- Faculty of Basic Medical Sciences, Kunming Medical University, Kunming 650500, China
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2
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Tatsuta T. [Basic Research on Bullfrog Egg-derived Sialic Acid-binding Lectin for Cancer Treatment]. YAKUGAKU ZASSHI 2022; 142:1045-1053. [PMID: 36184438 DOI: 10.1248/yakushi.22-00116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Sialic acid-binding lectin from Rana catesbeiana (cSBL) is a multifunctional protein with both lectin and ribonuclease activity and is, therefore, called a leczyme. It exerts cancer cell-selective antitumor effects on a variety of cancer cells in vitro and in vivo under conditions where no undesired side effects are observed. cSBL elicits antitumor effects by degrading cellular RNA and subsequently inducing apoptosis via a pathway mediated by mitochondria and endoplasmic reticulum stress. Further, it exerts synergistic antitumor effects with other molecules such as tumor necrosis factor-related apoptosis-inducing ligand and pemetrexed. Recent studies have revealed that long-term treatment of cancer cells with cSBL causes significant pleiotropic changes in the expression profiles of several genes, including multiple genes involved in metabolic pathways. Furthermore, cSBL reduces the expression of some cancer-related molecules such as human epidermal growth factor receptors, aldo-keto reductase 1B10, and ATP-binding cassette transporter C2. The information described above is expected to lead to useful applications, such as effective regimens comprising cSBL and other drugs. These findings reveal favorable properties of cSBL as an anticancer drug, which may contribute to the development of new therapeutic strategies for cancer treatment.
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Affiliation(s)
- Takeo Tatsuta
- Division of Cell Recognition Study, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University
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3
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Discovery of antitumor effects of leczymes. Glycoconj J 2022; 39:157-165. [DOI: 10.1007/s10719-021-10033-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/18/2021] [Accepted: 12/08/2021] [Indexed: 12/26/2022]
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Tatsuta T, Nakasato A, Sugawara S, Hosono M. Transcriptomic alterations in malignant pleural mesothelioma cells in response to long‑term treatment with bullfrog sialic acid‑binding lectin. Mol Med Rep 2021; 23:467. [PMID: 33880588 PMCID: PMC8097763 DOI: 10.3892/mmr.2021.12106] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/29/2021] [Indexed: 12/18/2022] Open
Abstract
Malignant pleural mesothelioma (MPM) is a universally lethal type of cancer that is increasing in incidence worldwide; therefore, the development of new drugs for MPM is an urgent task. Bullfrog sialic acid-binding lectin (cSBL) is a multifunctional protein that has carbohydrate-binding and ribonuclease activities. cSBL exerts marked antitumor activity against numerous types of cancer cells, with low toxicity to normal cells. Although in vitro and in vivo studies revealed that cSBL was effective against MPM, the mechanism by which cSBL exerts antitumor effects is not fully understood. To further understand the mechanism of action of cSBL, the present study aimed to identify the key molecules whose expression was affected by cSBL. The present study established cSBL-resistant MPM cells. Microarray analyses revealed that there were significant pleiotropic changes in the expression profiles of several genes, including multiple genes involved in metabolic pathways in cSBL-resistant cells. Furthermore, the expression of some members of the aldo-keto reductase family was revealed to be markedly downregulated in these cells. Among these, it was particularly interesting that cSBL action reduced the level of AKR1B10, which has been reported as a biomarker candidate for MPM prognosis. These findings revealed novel aspects of the effect of cSBL, which may contribute to the development of new therapeutic strategies for MPM.
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Affiliation(s)
- Takeo Tatsuta
- Division of Cell Recognition, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi 981‑8558, Japan
| | - Arisu Nakasato
- Division of Cell Recognition, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi 981‑8558, Japan
| | - Shigeki Sugawara
- Division of Cell Recognition, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi 981‑8558, Japan
| | - Masahiro Hosono
- Division of Cell Recognition, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi 981‑8558, Japan
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5
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Antitumor Potential of Marine and Freshwater Lectins. Mar Drugs 2019; 18:md18010011. [PMID: 31877692 PMCID: PMC7024344 DOI: 10.3390/md18010011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022] Open
Abstract
Often, even the most effective antineoplastic drugs currently used in clinic do not efficiently allow complete healing due to the related toxicity. The reason for the toxicity lies in the lack of selectivity for cancer cells of the vast majority of anticancer agents. Thus, the need for new potent anticancer compounds characterized by a better toxicological profile is compelling. Lectins belong to a particular class of non-immunogenic glycoproteins and have the characteristics to selectively bind specific sugar sequences on the surface of cells. This property is exploited to exclusively bind cancer cells and exert antitumor activity through the induction of different forms of regulated cell death and the inhibition of cancer cell proliferation. Thanks to the extraordinary biodiversity, marine environments represent a unique source of active natural compounds with anticancer potential. Several marine and freshwater organisms, ranging from the simplest alga to the most complex vertebrate, are amazingly enriched in these proteins. Remarkably, all studies gathered in this review show the impressive anticancer effect of each studied marine lectin combined with irrelevant toxicity in vitro and in vivo and pave the way to design clinical trials to assess the real antineoplastic potential of these promising proteins. It provides a concise and precise description of the experimental results, their interpretation as well as the experimental conclusions that can be drawn.
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Marcq E, Audenaerde JRV, Waele JD, Jacobs J, Loenhout JV, Cavents G, Pauwels P, Meerbeeck JPV, Smits EL. Building a Bridge between Chemotherapy and Immunotherapy in Malignant Pleural Mesothelioma: Investigating the Effect of Chemotherapy on Immune Checkpoint Expression. Int J Mol Sci 2019; 20:E4182. [PMID: 31455014 PMCID: PMC6747385 DOI: 10.3390/ijms20174182] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/30/2019] [Accepted: 08/06/2019] [Indexed: 12/13/2022] Open
Abstract
In light of the promising results of immune checkpoint blockade (ICPB) in malignant pleural mesothelioma (MPM), we investigated the effect of different chemotherapeutic agents on the expression of immune checkpoints (ICPs) in order to rationally design a good treatment schedule for their combination with ICP blocking antibodies. Cisplatin, oxaliplatin and pemetrexed are interesting chemotherapeutic agents to combine with immunotherapy given their immunomodulatory capacities. We looked into cisplatin and pemetrexed because their combination is used as first-line treatment of MPM. Additionally, the effect of the immunogenic chemotherapeutic agent, oxaliplatin, was also studied. Three different MPM cell lines were used for representation of both epithelioid and sarcomatoid subtypes. The desired inhibitory concentrations of the chemotherapeutic agents were determined with the SRB-assay. Allogeneic co-cultures of MPM cells with healthy donor peripheral blood mononuclear cells (PBMC) were set up to assess the effect of these chemotherapeutic agents on the expression of ICPs (PD-1, LAG-3, TIM-3) and their ligands (PD-L1, PD-L2, galectin-9). Cisplatin might be a promising treatment to combine with ICP blocking antibodies since our MPM cell lines were most susceptible to this stand-alone treatment. We found that the expression of ICPs and their ligands on both MPM cells and PBMC was mostly downregulated or unaltered when treated with chemotherapeutic agents, though no clear trend could be determined.
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Affiliation(s)
- Elly Marcq
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium.
| | | | - Jorrit De Waele
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium
| | - Julie Jacobs
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium
| | - Jinthe Van Loenhout
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium
| | - Glenn Cavents
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium
| | - Patrick Pauwels
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium
- Department of Pathology, Antwerp University Hospital, Antwerp 2650, Belgium
| | - Jan P van Meerbeeck
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium
- Department of Pulmonology & Thoracic Oncology, Antwerp University Hospital, Antwerp 2650, Belgium
| | - Evelien Lj Smits
- Center for Oncological Research, University of Antwerp, Antwerp 2000, Belgium
- Center for Cell Therapy and Regenerative Medicine, Antwerp University Hospital, Antwerp 2650, Belgium
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Geodorum densiflorum rhizome lectin inhibits Ehrlich ascites carcinoma cell growth by inducing apoptosis through the regulation of BAX, p53 and NF-κB genes expression. Int J Biol Macromol 2019; 125:92-98. [DOI: 10.1016/j.ijbiomac.2018.12.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 11/23/2018] [Accepted: 12/02/2018] [Indexed: 01/09/2023]
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Sugawara S. [Application of Lectin from Catfish Eggs to Cancer Therapy: A Fundamental Study]. YAKUGAKU ZASSHI 2018; 138:1451-1459. [PMID: 30504657 DOI: 10.1248/yakushi.18-00128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Silurus asotus egg lectin (SAL) is an α-galactoside-binding protein, isolated from the egg of catfish. It belongs to the rhamnose-binding lectin family that binds to Gb3 glycan (Galα1-4Galβ1-4Glc). SAL has resulted in the induction of early apoptosis in the Raji cell line, which is a Burkitt's lymphoma cell line expressing Gb3. The apoptosis was characterized by i) increased externalization of phosphatidylserin via multidrug resistance 1 P-glycoprotein (MDR1 P-gp), and ii) reduced cell size through the activation of voltage-gated potassium channel Kv1.3. Although the incorporation of propidium iodide (PI) was observed, SAL did not cause apoptosis in Raji cells. This event may be due to an increased expression of membrane-anchored tumor necrosis factor α (TNFα) and TNF receptor 1 (TNFR1) after the binding of SAL to Gb3. Moreover, SAL arrested the cell cycle at the G0/1 phase, thus inhibiting cell proliferation. The suppression of cell proliferation by SAL was likely due to the enhanced expression of p21 caused by the phosphorylation of ERK1/2 through the Ras-MEK-ERK1/2 pathway. Combination of SAL with anti-cancer drugs was also examined in this study. Interestingly, SAL increased the incorporation of doxorubicin (Dox) into Raji cells, consequently enhancing its cytotoxic effect. Similarly, the cytotoxic effects of vinblastine and irinotecan were also significantly increased in Raji cells treated with SAL. These studies demonstrate that SAL may be applied to cancer therapy.
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Affiliation(s)
- Shigeki Sugawara
- Division of Cell Recognition Study, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University
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Sialic Acid-Binding Lectin from Bullfrog Eggs Exhibits an Anti-Tumor Effect Against Breast Cancer Cells Including Triple-Negative Phenotype Cells. Molecules 2018; 23:molecules23102714. [PMID: 30347895 PMCID: PMC6222625 DOI: 10.3390/molecules23102714] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/19/2018] [Accepted: 10/19/2018] [Indexed: 01/22/2023] Open
Abstract
Sialic acid-binding lectin from Rana catesbeiana eggs (cSBL) is a multifunctional protein that has lectin and ribonuclease activity. In this study, the anti-tumor activities of cSBL were assessed using a panel of breast cancer cell lines. cSBL suppressed the cell growth of all cancer cell lines tested here at a concentration that is less toxic, or not toxic at all, to normal cells. The growth suppressive effect was attributed to the cancer-selective induction of apoptosis. We assessed the expressions of several key molecules associated with the breast cancer phenotype after cSBL treatment by western blotting. cSBL decreased the expression level of estrogen receptor (ER) α, while it increased the phosphorylation level of p38 mitogen-activated protein kinase (MAPK). cSBL also suppressed the expression of the progesterone receptor (PgR) and human epidermal growth factor receptor type 2 (HER2). Furthermore, it was revealed that cSBL decreases the expression of the epidermal growth factor receptor (EGFR/HER1) in triple-negative breast cancer cells. These results indicate that cSBL induces apoptosis with decreasing ErbB family proteins and may have great potential for breast cancer chemotherapy, particularly in triple-negative phenotype cells.
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Sato Y, Matsuda S, Maruyama A, Nakayama J, Miyashita T, Udagawa H, Umemura S, Yanagihara K, Ochiai A, Tomita M, Soga T, Tsuchihara K, Makinoshima H. Metabolic Characterization of Antifolate Responsiveness and Non-responsiveness in Malignant Pleural Mesothelioma Cells. Front Pharmacol 2018; 9:1129. [PMID: 30369878 PMCID: PMC6194193 DOI: 10.3389/fphar.2018.01129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 09/18/2018] [Indexed: 12/22/2022] Open
Abstract
Antifolates are a class of drugs effective for treating malignant pleural mesothelioma (MPM). The majority of antifolates inhibit enzymes involved in purine and pyrimidine synthesis such as dihydrofolate reductase (DHFR), thymidylate synthase (TYMS), and glycinamide ribonucleotide formyltransferase (GART). In order to select the most suitable patients for effective therapy with drugs targeting specific metabolic pathways, there is a need for better predictive metabolic biomarkers. Antifolates can alter global metabolic pathways in MPM cells, yet the metabolic profile of treated cells has not yet been clearly elucidated. Here we found that MPM cell lines could be categorized into two groups according to their sensitivity or resistance to pemetrexed treatment. We show that pemetrexed susceptibility could be reversed and DNA synthesis rescued in drug-treated cells by the exogenous addition of the nucleotide precursors hypoxanthine and thymidine (HT). We observed that the expression of pemetrexed-targeted enzymes in resistant MPM cells was quantitatively lower than that seen in pemetrexed-sensitive cells. Metabolomic analysis revealed that glycine and choline, which are involved in one-carbon metabolism, were altered after drug treatment in pemetrexed-sensitive but not resistant MPM cells. The addition of HT upregulated the concentration of inosine monophosphate (IMP) in pemetrexed-sensitive MPM cells, indicating that the nucleic acid biosynthesis pathway is important for predicting the efficacy of pemetrexed in MPM cells. Our data provide evidence that may link therapeutic response to the regulation of metabolism, and points to potential biomarkers for informing clinical decisions regarding the most effective therapies for patients with MPM.
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Affiliation(s)
- Yuzo Sato
- Tsuruoka Metabolomics Laboratory, National Cancer Center, Tsuruoka, Japan.,Shonai Regional Industry Promotion Center, Tsuruoka, Japan.,Systems Biology Program, Graduate School of Media and Governance, Keio University, Fujisawa, Japan.,Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan
| | - Shiori Matsuda
- Tsuruoka Metabolomics Laboratory, National Cancer Center, Tsuruoka, Japan.,Shonai Regional Industry Promotion Center, Tsuruoka, Japan.,Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan
| | - Ami Maruyama
- Tsuruoka Metabolomics Laboratory, National Cancer Center, Tsuruoka, Japan.,Shonai Regional Industry Promotion Center, Tsuruoka, Japan
| | - Joji Nakayama
- Tsuruoka Metabolomics Laboratory, National Cancer Center, Tsuruoka, Japan.,Shonai Regional Industry Promotion Center, Tsuruoka, Japan.,Division of Translational Research, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Japan
| | - Tomoyuki Miyashita
- Tsuruoka Metabolomics Laboratory, National Cancer Center, Tsuruoka, Japan.,Shonai Regional Industry Promotion Center, Tsuruoka, Japan.,Division of Translational Research, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Japan
| | - Hibiki Udagawa
- Department of Thoracic Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - Shigeki Umemura
- Department of Thoracic Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - Kazuyoshi Yanagihara
- Division of Biomarker Discovery, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Japan
| | - Atsushi Ochiai
- Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Japan
| | - Masaru Tomita
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Fujisawa, Japan.,Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan
| | - Tomoyoshi Soga
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Fujisawa, Japan.,Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan
| | - Katsuya Tsuchihara
- Division of Translational Research, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Japan
| | - Hideki Makinoshima
- Tsuruoka Metabolomics Laboratory, National Cancer Center, Tsuruoka, Japan.,Division of Translational Research, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Japan
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Tatsuta T, Satoh T, Sugawara S, Hara A, Hosono M. Sialic acid-binding lectin from bullfrog eggs inhibits human malignant mesothelioma cell growth in vitro and in vivo. PLoS One 2018; 13:e0190653. [PMID: 29298350 PMCID: PMC5752036 DOI: 10.1371/journal.pone.0190653] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/18/2017] [Indexed: 12/29/2022] Open
Abstract
Malignant mesothelioma is an aggressive cancer that results from exposure to asbestos. The therapeutic options for this type of cancer are limited; therefore, the development of novel therapeutic agents is urgently required. Sialic acid-binding lectin isolated from Rana catesbeiana oocytes (cSBL) is a novel therapeutic candidate for cancer, which exhibits antitumor activity mediated through RNA degradation. In the present study, we evaluated the effect of cSBL in vitro and in vivo. Xenograft-competent H2452 and MSTO human mesothelioma cell lines were treated with cSBL, and the pathway by which cSBL induces apoptosis was analyzed. In vivo studies were performed using nude mice inoculated with one of the two cell lines, and the effects of cSBL and pemetrexed were monitored simultaneously. Furthermore, the pharmacological interactions between the three agents (pemetrexed, cisplatin and cSBL) were statistically assessed. It was demonstrated that cSBL treatments caused morphological and biochemical apoptotic changes in both cell lines. Caspase cascade analysis revealed that an intrinsic pathway mediated cSBL-induced apoptosis. The administration of cSBL significantly inhibited tumor growth in two xenograft models, without any adverse effects. Furthermore, the combination index and dose reduction index values indicated that the cSBL + pemetrexed combination showed the highest synergism, and thus potential for reducing dosage of each drug, compared with the other combinations, including the existing pemetrexed + cisplatin regimen. cSBL exerted prominent antitumor effects on malignant mesothelioma cells in vitro and in vivo, and showed favorable effects when combined with pemetrexed. These results suggest that cSBL has potential as a novel drug for the treatment of malignant mesothelioma.
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Affiliation(s)
- Takeo Tatsuta
- Division of Cell Recognition Study, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Aobaku, Sendai, Japan
| | - Toshiyuki Satoh
- Division of Cell Recognition Study, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Aobaku, Sendai, Japan
- Department of Clinical Pharmacotherapeutics, Tohoku Medical and Pharmaceutical University, Aobaku, Sendai, Japan
| | - Shigeki Sugawara
- Division of Cell Recognition Study, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Aobaku, Sendai, Japan
| | - Akiyoshi Hara
- Department of Clinical Pharmacotherapeutics, Tohoku Medical and Pharmaceutical University, Aobaku, Sendai, Japan
| | - Masahiro Hosono
- Division of Cell Recognition Study, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Aobaku, Sendai, Japan
- * E-mail:
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