1
|
Tachibana M, Baba M, Iriko H, Shinzawa N, Torii M, Ishino T. Identification of a novel protein localized to the crystalloid of the Plasmodium ookinete. Parasitol Int 2024; 101:102892. [PMID: 38565335 DOI: 10.1016/j.parint.2024.102892] [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] [Received: 02/08/2024] [Revised: 03/25/2024] [Accepted: 03/30/2024] [Indexed: 04/04/2024]
Abstract
Reducing Plasmodium parasite transmission via the mosquito vector is a promising strategy for malaria control and elimination in endemic regions. In the mosquito midgut after the ingestion of an infected blood meal, malaria parasite gametes egress from erythrocytes and fertilize to develop into motile ookinetes that traverse midgut epithelial cells and transform into oocysts adjacent the basal lamina. Plasmodium ookinetes and young oocysts possess a unique organelle called the crystalloid; which has a honeycomb-like matrix structure and is indicated to be involved in sporozoite formation and maturation. In this study, we identified a novel crystalloid protein, PY17X_1113800, that is exclusively expressed in developing ookinetes. The protein possesses a signal peptide sequence, but lacks a transmembrane domain or GPI anchor signal sequence, as well as predicted adhesive domains which are characterisitic of many crystalloid proteins. The protein is highly conserved across the phylum Apicomplexa and within the greater clade Alveolata, such as Vitrella and the ciliates Paramecium and Tetrahymena, but is absent in cryptosporidia.
Collapse
Affiliation(s)
- Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-science Center, Ehime University, 454 Shitsukawa, Toon, Ehime 791-0295, Japan
| | - Minami Baba
- Department of Parasitology and Tropical Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Hideyuki Iriko
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, Hyogo 654-0142, Japan
| | - Naoaki Shinzawa
- Department of Parasitology and Tropical Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Motomi Torii
- Division of Molecular Parasitology, Proteo-science Center, Ehime University, 454 Shitsukawa, Toon, Ehime 791-0295, Japan
| | - Tomoko Ishino
- Department of Parasitology and Tropical Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.
| |
Collapse
|
2
|
Baba M, Nozaki M, Tachibana M, Tsuboi T, Torii M, Ishino T. Rhoptry neck protein 4 plays important roles during Plasmodium sporozoite infection of the mammalian liver. mSphere 2023; 8:e0058722. [PMID: 37272704 PMCID: PMC10449513 DOI: 10.1128/msphere.00587-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 04/05/2023] [Indexed: 06/06/2023] Open
Abstract
During invasion, Plasmodium parasites secrete proteins from rhoptry and microneme apical end organelles, which have crucial roles in attaching to and invading target cells. A sporozoite stage-specific gene silencing system revealed that rhoptry neck protein 2 (RON2), RON4, and RON5 are important for sporozoite invasion of mosquito salivary glands. Here, we further investigated the roles of RON4 during sporozoite infection of the liver in vivo. Following intravenous inoculation of RON4-knockdown sporozoites into mice, we demonstrated that sporozoite RON4 has multiple functions during sporozoite traversal of sinusoidal cells and infection of hepatocytes. In vitro infection experiments using a hepatoma cell line revealed that secreted RON4 is involved in sporozoite adhesion to hepatocytes and has an important role in the early steps of hepatocyte infection. In addition, in vitro motility assays indicated that RON4 is required for sporozoite attachment to the substrate and the onset of migration. These findings indicate that RON4 is crucial for sporozoite migration toward and invasion of hepatocytes via attachment ability and motility.IMPORTANCEMalarial parasite transmission to mammals is established when sporozoites are inoculated by mosquitoes and migrate through the bloodstream to infect hepatocytes. Many aspects of the molecular mechanisms underpinning migration and cellular invasion remain largely unelucidated. By applying a sporozoite stage-specific gene silencing system in the rodent malarial parasite, Plasmodium berghei, we demonstrated that rhoptry neck protein 4 (RON4) is crucial for sporozoite infection of the liver in vivo. Combined with in vitro investigations, it was revealed that RON4 functions during a crossing of the sinusoidal cell layer and invading hepatocytes, at an early stage of liver infection, by mediating the sporozoite capacity for adhesion and the onset of motility. Since RON4 is also expressed in Plasmodium merozoites and Toxoplasma tachyzoites, our findings contribute to understanding the conserved invasion mechanisms of Apicomplexa parasites.
Collapse
Affiliation(s)
- Minami Baba
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime, Japan
- Department of Protozoology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Sakamoto, Nagasaki, Japan
| | - Mamoru Nozaki
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime, Japan
| | - Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime, Japan
| | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Ehime, Japan
| | - Motomi Torii
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime, Japan
| | - Tomoko Ishino
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime, Japan
- Department of Parasitology and Tropical Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Yushima, Bunkyo-ku, Tokyo, Japan
| |
Collapse
|
3
|
Hosoda M, Takahashi M, Baba M, Oshino T, Moriya Y. P001 Scalp cooling system for breast cancer patients treated by adjuvant or neo-adjuvant chemotherapy. Breast 2023. [DOI: 10.1016/s0960-9776(23)00120-0] [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: 03/15/2023] Open
|
4
|
Baba M, Adali N. Analyse de survie des patients atteints de glioblastome au Maroc. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.03.035] [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
|
5
|
Zouari H, Dabert M, Asia L, Wong-Wah-Chung P, Baba M, Balan L, Israëli Y. Influence of in situ photo-induced silver nanoparticles on the ageing of acrylate materials. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.113112] [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: 10/22/2022]
|
6
|
Tachibana M, Baba M, Takashima E, Tsuboi T, Torii M, Ishino T. The C-terminal region of the Plasmodium yoelii microgamete surface antigen PyMiGS induces potent anti-malarial transmission-blocking immunity in mice. Vaccine 2020; 38:3129-3136. [PMID: 32147299 DOI: 10.1016/j.vaccine.2020.02.058] [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] [Received: 08/26/2019] [Accepted: 02/18/2020] [Indexed: 11/26/2022]
Abstract
Malaria transmission-blocking vaccines (TBVs) aim to inhibit parasite fertilization or further development within the mosquito midgut. Because TBV-immunized individuals reduce the transmission of malaria parasites to mosquito vectors, TBVs could serve as a promising strategy to eliminate malaria. We previously reported that a male specific protein, PyMiGS (Plasmodium yoelii microgamete surface protein), is localized to the surface of microgametes and anti-PyMiGS antibodies have strong transmission-blocking activity. In this study we determine a region of PyMiGS that contains epitopes inducing potent transmission-blocking antibodies. PyMiGS excluding the N-terminal signal sequence and C-terminal hydrophobic region (PyMiGS-full) was divided into five overlapping regions, named I through V, and corresponding truncated recombinant proteins were produced. Anti-region V antibody, affinity-purified from anti-PyMiGS-full rabbit antiserum, significantly reduced the number of oocysts in a mosquito membrane-feeding assay. Antibodies from mice immunized with PyMiGS-V recognized the microgamete surface and showed higher transmission-blocking efficacy than antibodies obtained by PyMiGS-full immunization. These results indicate that the major epitopes for transmission-blocking antibodies are within region V at the C-terminal region of PyMiGS. Therefore, region V of MiGS could be a promising pre-fertilization TBV candidate antigen.
Collapse
Affiliation(s)
- Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan
| | - Minami Baba
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan
| | - Eizo Takashima
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Ehime 790-8577, Japan
| | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Ehime 790-8577, Japan
| | - Motomi Torii
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan; Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Ehime 790-8577, Japan
| | - Tomoko Ishino
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan.
| |
Collapse
|
7
|
Ishino T, Tachibana M, Baba M, Iriko H, Tsuboi T, Torii M. Observation of morphological changes of female osmiophilic bodies prior to Plasmodium gametocyte egress from erythrocytes. Mol Biochem Parasitol 2020; 236:111261. [PMID: 31981605 DOI: 10.1016/j.molbiopara.2020.111261] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 12/20/2022]
Abstract
Plasmodium parasites cause malaria in mammalian hosts and are transmitted by Anopheles mosquitoes. Gametocytes, which differentiate from asexual-stage parasites, are activated by environmental changes when ingested into the mosquito midgut, and are rapidly released from erythrocytes prior to fertilization. Secretory proteins localized to osmiophilic bodies (OBs), organelles unique to gametocytes, have been reported to be involved in female gametocyte egress. In this study, we investigate the dynamics of OBs in activated gametocytes of Plasmodium falciparum and Plasmodium yoelii using the female OB-specific marker protein, G377. After activation, female gametocyte OBs migrate to the parasite surface and fuse to form large vesicles beneath the parasite plasma membrane. At the marginal region of female gametocytes, fused vesicles secrete contents by exocytosis into the parasitophorous vacuole space, prior to parasite egress via the break-down of the erythrocyte membrane. This is the first detailed description of how proteins are transported through osmiophilic bodies.
Collapse
Affiliation(s)
- Tomoko Ishino
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan.
| | - Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan
| | - Minami Baba
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan
| | - Hideyuki Iriko
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, Hyogo 654-0142, Japan
| | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Ehime 790-8577, Japan
| | - Motomi Torii
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan; Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Ehime 790-8577, Japan
| |
Collapse
|
8
|
Matsutani H, Amano M, Izumi C, Baba M, Abe R, Hashiwada S, Kuwano K, Shimada M, Sakamoto J, Miyake M, Tamura T, Matsuo S. P1444 Occurrence and predictors of right ventricular dysfunction after pericardiocentesis. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background—The changes in cardiac function that occur after pericardiocentesis are unclear.Purpose—This study was performed to assess right ventricular (RV) and left ventricular (LV) function with echocardiography before and after pericardiocentesis.
Method and Results—In total, 19 consecutive patients who underwent pericardiocentesis for more than moderate pericardial effusion were prospectively enrolled from August 2015 to October 2017. Comprehensive transthoracic echocardiography was performed before, immediately after (within 3 hours), and 1 day after pericardiocentesis to investigate the changes in RV and LV function. RV dysfunction is defined as meeting three of the four criteria: a TAPSE of <17 mm, an S’ of <9.5 cm, an FAC of <35%, and an RV free wall longitudinal strain >−20%. The mean age of all patients was 72.6 ± 12.2 years. The changes of echocardiographic parameters related to RV function are shown in Table. After pericardiocentesis, RV inflow and outflow diameters increased and the parameters of RV function significantly decreased. These abnormal values or RV dysfunction remained at 1 day after pericardiocentesis. Conversely, no parameters of LV function parameters changed after pericardiocentesis. Of 19 patients, 13 patients showed RV dysfunction immediately after pericardiocentesis and 6 patients did not. RV free wall longitudinal strain before pericardiocentesis was higher in patients with post-procedural RV dysfunction (−18.9 ± 3.6%) than in those without (−28.4 ± 6.3%). ROC analysis revealed that a RV free wall longitudinal strain cut-off value of −23.0% had a sensitivity of 100% and a specificity of 83.3% for predicting the occurrence of RV dysfunction after pericardiocentesis (AUC = 0.910).
Conclusions—The occurrence of RV dysfunction after pericardiocentesis should be given more attention. Pre-existing RV dysfunction maybe related to the occurrence of RV dysfunction after pericardiocentesis.
Changes in RV function before and after Before Immediately after One day after P−value Basal right ventricular linear dimension (mm) 32.8 ± 5.0 37.1 ± 4.4† 33.6 ± 5.4 0.028 Mid-cavity right ventricular linear dimension (mm) 34.5 ± 4.6 38.8 ± 5.3† 37.0 ± 5.6 0.0504 Proximal right ventricular outflow diameter (mm) 30.2 ± 4.0 33.9 ± 3.5† 31.4 ± 3.9 0.014 TAPSE (mm) 20.0 ± 4.2 13.6 ± 4.3* 14.7 ± 3.9 <0.001 S" (cm/s) 12.6 ± 3.3 8.7 ± 2.4* 9.1 ± 2.4 <0.001 Fractional area change (%) 48.3 ± 5.9 37.8 ± 8.0* 40.0 ± 9.0 <0.001 Right ventricular free wall strain (%) −21.3 ± 6.3 −15.8 ± 6.7* −16.9 ± 5.2 0.036 Tricuspid regurgitation velocity peak (m/s) 2.41 ± 0.29 2.43 ± 0.25 2.34 ± 0.32 0.37
Collapse
Affiliation(s)
- H Matsutani
- Tenri Hospital, Department of Clinical Laboratory, Tenri, Japan
| | - M Amano
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - M Baba
- Tenri Hospital, Department of Clinical Laboratory, Tenri, Japan
| | - R Abe
- Tenri Hospital, Department of Clinical Laboratory, Tenri, Japan
| | - S Hashiwada
- Tenri Hospital, Department of Clinical Laboratory, Tenri, Japan
| | - K Kuwano
- Tenri Hospital, Department of Clinical Laboratory, Tenri, Japan
| | - M Shimada
- Tenri Hospital, Department of Clinical Laboratory, Tenri, Japan
| | - J Sakamoto
- Tenri Hospital, Department of Cardiology, Tenri, Japan
| | - M Miyake
- Tenri Hospital, Department of Cardiology, Tenri, Japan
| | - T Tamura
- Tenri Hospital, Department of Cardiology, Tenri, Japan
| | - S Matsuo
- Tenri Hospital, Department of Clinical Laboratory, Tenri, Japan
| |
Collapse
|
9
|
Miura K, Tachibana M, Takashima E, Morita M, Kanoi BN, Nagaoka H, Baba M, Torii M, Ishino T, Tsuboi T. Malaria transmission-blocking vaccines: wheat germ cell-free technology can accelerate vaccine development. Expert Rev Vaccines 2019; 18:1017-1027. [PMID: 31566026 PMCID: PMC11000147 DOI: 10.1080/14760584.2019.1674145] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 06/22/2019] [Accepted: 09/25/2019] [Indexed: 12/18/2022]
Abstract
Introduction: Highly effective malaria vaccines are essential component toward malaria elimination. Although the leading malaria vaccine, RTS,S/AS01, with modest efficacy is being evaluated in a pilot feasibility trial, development of a malaria transmission-blocking vaccine (TBV) could make a major contribution toward malaria elimination. Only a few TBV antigens have reached pre-clinical or clinical development but with several challenges including difficulties in the expression of malaria recombinant proteins and low immunogenicity in humans. Therefore, novel approaches to accelerate TBV research to preclinical development are critical to generate an efficacious TBV.Areas covered: PubMed was searched to review the progress and future prospects of malaria TBV research and development. We also reviewed registered trials at ClinicalTrials.gov as well as post-genome TBV candidate discovery research including our efforts.Expert opinion: Wheat germ cell-free protein synthesis technology can accelerate TBV development by overcoming some current challenges of TBV research.
Collapse
Affiliation(s)
- Kazutoyo Miura
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Eizo Takashima
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Masayuki Morita
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Bernard N Kanoi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Hikaru Nagaoka
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Minami Baba
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Motomi Torii
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Tomoko Ishino
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| |
Collapse
|
10
|
Tokunaga N, Nozaki M, Tachibana M, Baba M, Matsuoka K, Tsuboi T, Torii M, Ishino T. Expression and Localization Profiles of Rhoptry Proteins in Plasmodium berghei Sporozoites. Front Cell Infect Microbiol 2019; 9:316. [PMID: 31552198 PMCID: PMC6746830 DOI: 10.3389/fcimb.2019.00316] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 08/22/2019] [Indexed: 02/04/2023] Open
Abstract
In the Plasmodium lifecycle two infectious stages of parasites, merozoites, and sporozoites, efficiently infect mammalian host cells, erythrocytes, and hepatocytes, respectively. The apical structure of merozoites and sporozoites contains rhoptry and microneme secretory organelles, which are conserved with other infective forms of apicomplexan parasites. During merozoite invasion of erythrocytes, some rhoptry proteins are secreted to form a tight junction between the parasite and target cell, while others are discharged to maintain subsequent infection inside the parasitophorous vacuole. It has been questioned whether the invasion mechanisms mediated by rhoptry proteins are also involved in sporozoite invasion of two distinct target cells, mosquito salivary glands and mammalian hepatocytes. Recently we demonstrated that rhoptry neck protein 2 (RON2), which is crucial for tight junction formation in merozoites, is also important for sporozoite invasion of both target cells. With the aim of comprehensively describing the mechanisms of sporozoite invasion, the expression and localization profiles of rhoptry proteins were investigated in Plasmodium berghei sporozoites. Of 12 genes representing merozoite rhoptry molecules, nine are transcribed in oocyst-derived sporozoites at a similar or higher level compared to those in blood-stage schizonts. Immuno-electron microscopy demonstrates that eight proteins, namely RON2, RON4, RON5, ASP/RON1, RALP1, RON3, RAP1, and RAMA, localize to rhoptries in sporozoites. It is noteworthy that most rhoptry neck proteins in merozoites are localized throughout rhoptries in sporozoites. This study demonstrates that most rhoptry proteins, except components of the high-molecular mass rhoptry protein complex, are commonly expressed in merozoites and sporozoites in Plasmodium spp., which suggests that components of the invasion mechanisms are basically conserved between infective forms independently of their target cells. Combined with sporozoite-stage specific gene silencing strategies, the contribution of rhoptry proteins in invasion mechanisms can be described.
Collapse
Affiliation(s)
- Naohito Tokunaga
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Mamoru Nozaki
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Minami Baba
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Kazuhiro Matsuoka
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Motomi Torii
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Tomoko Ishino
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| |
Collapse
|
11
|
Bantuchai S, Nozaki M, Thongkukiatkul A, Lorsuwannarat N, Tachibana M, Baba M, Matsuoka K, Tsuboi T, Torii M, Ishino T. Rhoptry neck protein 11 has crucial roles during malaria parasite sporozoite invasion of salivary glands and hepatocytes. Int J Parasitol 2019; 49:725-735. [DOI: 10.1016/j.ijpara.2019.05.001] [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: 12/22/2018] [Revised: 03/29/2019] [Accepted: 05/03/2019] [Indexed: 12/01/2022]
|
12
|
Tárkányi F, Ditrói F, Takács S, Csikai J, Hermanne A, Uddin MS, Baba M. Production routes of 107,109Cd radioisotopes via charged particle induced nuclear reactions. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-6226-1] [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: 12/01/2022]
|
13
|
Ishino T, Murata E, Tokunaga N, Baba M, Tachibana M, Thongkukiatkul A, Tsuboi T, Torii M. Rhoptry neck protein 2 expressed in Plasmodium sporozoites plays a crucial role during invasion of mosquito salivary glands. Cell Microbiol 2018; 21:e12964. [PMID: 30307699 PMCID: PMC6587811 DOI: 10.1111/cmi.12964] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 09/28/2018] [Accepted: 10/05/2018] [Indexed: 01/03/2023]
Abstract
Malaria parasite transmission to humans is initiated by the inoculation of Plasmodium sporozoites into the skin by mosquitoes. Sporozoites develop within mosquito midgut oocysts, first invade the salivary glands of mosquitoes, and finally infect hepatocytes in mammals. The apical structure of sporozoites is conserved with the infective forms of other apicomplexan parasites that have secretory organelles, such as rhoptries and micronemes. Because some rhoptry proteins are crucial for Plasmodium merozoite infection of erythrocytes, we examined the roles of rhoptry proteins in sporozoites. Here, we demonstrate that rhoptry neck protein 2 (RON2) is also localized to rhoptries in sporozoites. To elucidate RON2 function in sporozoites, we applied a promoter swapping strategy to restrict ron2 transcription to the intraerythrocytic stage in the rodent malaria parasite, Plasmodium berghei. Ron2 knockdown sporozoites were severely impaired in their ability to invade salivary glands, via decreasing the attachment capacity to the substrate. This is the first rhoptry protein demonstrated to be involved in salivary gland invasion. In addition, ron2 knockdown sporozoites showed less infectivity to hepatocytes, possibly due to decreased attachment/gliding ability, indicating that parts of the parasite invasion machinery are conserved, but their contribution might differ among infective forms. Our sporozoite stage‐specific knockdown system will help to facilitate understanding the comprehensive molecular mechanisms of parasite invasion of target cells.
Collapse
Affiliation(s)
- Tomoko Ishino
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Eri Murata
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan.,Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Naohito Tokunaga
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Minami Baba
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| | | | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Motomi Torii
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Japan
| |
Collapse
|
14
|
Aye KM, Nagayasu E, Baba M, Yoshida A, Takashima Y, Maruyama H. Evaluation of LIPS (luciferase immunoprecipitation system) for serodiagnosis of Toxoplasmosis. J Immunol Methods 2018; 462:91-100. [PMID: 30201391 DOI: 10.1016/j.jim.2018.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 04/13/2018] [Revised: 08/17/2018] [Accepted: 09/06/2018] [Indexed: 01/05/2023]
Abstract
Development of reliable, quantitative technologies for serodiagnosis of Toxoplasma gondii infection remains desirable. The luciferase immunoprecipitation system (LIPS) is a relatively simple, highly sensitive, and rapid quantitative immunoassay. The major advantages of this assay over ELISA are a wider dynamic range, shorter overall assay time, and less sample volume. In this study, we aimed to use this method for the serodiagnosis of toxoplasmosis. Recombinant Toxoplasma antigens (dense granule antigens GRA6, GRA7, and GRA8 and bradyzoite antigen BAG1) fused with nanoluciferase (Nluc, a small luciferase enzyme) were expressed in Escherichia coli, purified, and tested in LIPS assays with sera from experimental mice infected with T. gondii and a WHO standard anti-Toxoplasma human immunoglobulin (TOXM). In the experimentally infected mice, LIPS assays detected antibodies against Nluc-GRA6, Nluc-GRA7, and Nluc-GRA8 as early as day 14, whereas antibodies against Nluc-BAG1 remained undetected until day 21 and then showed significant elevation on day 60. In TOXM sera, LIPS assays with each Nluc recombinant protein produced reliable standard curves with a coefficient of determination (R2) of 0.980-0.989 for GRA6, 0.986-0.990 for GRA7, 0.998-0.999 for GRA8, and 0.942-0.987 for BAG1. The detection limits were estimated to be 3.9, 2, 1, and 1 IU/ml for rGRA6, rGRA7, rGRA8, and rBAG1, respectively. The LIPS assay for toxoplasmosis could detect antibodies against T. gondii in the mouse and human sera with a reasonably high sensitivity. We consider the LIPS assay to be a promising alternative tool for screening, diagnosing, and monitoring toxoplasmosis. In particular, detection of antibodies against BAG1 may be useful for a longitudinal seroprevalence study in suspected high-risk areas on the basis of its elevated serum concentration in the chronic phase.
Collapse
Affiliation(s)
- Khin Myo Aye
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan; Parasitology Research Division, Department of Medical Research, Yangon, Myanmar.
| | - Eiji Nagayasu
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
| | - Minami Baba
- Department of Veterinary Parasitology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan; Proteo-Science Center, Division of Molecular Parasitology, Ehime University, Toon, Japan.
| | - Ayako Yoshida
- Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan; Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan.
| | - Yasuhiro Takashima
- Department of Veterinary Parasitology, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan; Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), Gifu, Japan.
| | - Haruhiko Maruyama
- Division of Parasitology, Department of Infectious Diseases, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
| |
Collapse
|
15
|
Gauci MO, Bonnevialle N, Moineau G, Baba M, Walch G, Boileau P. Anatomical total shoulder arthroplasty in young patients with osteoarthritis: all-polyethylene versus metal-backed glenoid. Bone Joint J 2018; 100-B:485-492. [PMID: 29629579 DOI: 10.1302/0301-620x.100b4.bjj-2017-0495.r2] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Aims Controversy about the use of an anatomical total shoulder arthroplasty (aTSA) in young arthritic patients relates to which is the ideal form of fixation for the glenoid component: cemented or cementless. This study aimed to evaluate implant survival of aTSA when used in patients aged < 60 years with primary glenohumeral osteoarthritis (OA), and to compare the survival of cemented all-polyethylene and cementless metal-backed glenoid components. Materials and Methods A total of 69 consecutive aTSAs were performed in 67 patients aged < 60 years with primary glenohumeral OA. Their mean age at the time of surgery was 54 years (35 to 60). Of these aTSAs, 46 were undertaken using a cemented polyethylene component and 23 were undertaken using a cementless metal-backed component. The age, gender, preoperative function, mobility, premorbid glenoid erosion, and length of follow-up were comparable in the two groups. The patients were reviewed clinically and radiographically at a mean of 10.3 years (5 to 12, sd 26) postoperatively. Kaplan-Meier survivorship analysis was performed with revision as the endpoint. Results A total of 26 shoulders (38%) underwent revision surgery: ten (22%) in the polyethylene group and 16 (70%) in the metal-backed group (p < 0.0001). At 12 years' follow-up, the rate of implant survival was 74% (sd 0.09) for polyethylene components and 24% (sd 0.10) for metal-backed components (p < 0.0002). Glenoid loosening or failure was the indication for revision in the polyethylene group, whereas polyethylene wear with metal-on-metal contact, instability, and insufficiency of the rotator cuff were the indications for revision in the metal-backed group. Preoperative posterior subluxation of the humeral head with a biconcave/retroverted glenoid (Walch B2) had an adverse effect on the survival of a metal-backed component. Conclusion The survival of a cemented polyethylene glenoid component is three times higher than that of a cementless metal-backed glenoid component ten years after aTSA in patients aged < 60 years with primary glenohumeral OA. Patients with a biconcave (B2) glenoid have the highest risk of failure. Cite this article: Bone Joint J 2018;100-B:485-92.
Collapse
Affiliation(s)
- M O Gauci
- Institut Universitaire Locomoteur et du Sport, Hôpital Pasteur 2 and Université Nice-Sophia Antipolis, Nice Cedex 1, France
| | - N Bonnevialle
- Centre Hospitalier Universitaire de Toulouse-Purpan, Toulouse, France
| | - G Moineau
- Clinique Pasteur-Lanroze, Brest, France
| | - M Baba
- Sydney Adventist Hospital, Wahroonga, New South Wales, Australia
| | - G Walch
- Centre Médical Santy, Lyon, France
| | - P Boileau
- Institut Universitaire Locomoteur et du Sport, Hôpital Pasteur 2 and Université Nice-Sophia Antipolis, Nice Cedex 1, France
| |
Collapse
|
16
|
Ishida N, Hatanaka Y, Baba M, Hagio K, Okada H, Hatanaka KC, Matsuno Y, Yamashita H. Abstract P4-08-07: PIK3CA mutation, reduced AKT serine 473 phosphorylation, and increased ERα serine 167 phosphorylation are positive prognostic indicators in postmenopausal estrogen receptor-positive, HER2-negative early breast cancer. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p4-08-07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Endocrine therapy is the most important treatment option for women with estrogen receptor (ER)-positive breast cancer. We recently reported that approximately two-thirds of patients who relapsed within 5 years had received anthracyclins and/or taxanes as adjuvant or neoadjuvant chemotherapy in addition to adjuvant endocrine therapy. New strategies, such as signal transduction inhibitors together with endocrine therapy are required to improve survival. PIK3CA mutations are detected in almost 40% of early ER-positive breast cancers, and are therefore the most frequent genetic alterations in this subtype. PIK3CA mutation status is reported to affect activation of AKT and ERα. Moreover, recent studies demonstrate that patients had a better prognosis when tumors expressed ER, androgen receptor (AR), and vitamin D receptor (VDR).
Methods: Expression of AR and VDR, phosphorylation of AKT serine (Ser) 473 (AKT phospho-Ser473) and ERα Ser167 (ERα phospho-Ser167) were examined by immunohistochemistry in ER-positive, HER2-negative early breast cancer tissues. Seventeen mutations in exons 1, 4, 7, 9, and 20 of the PIK3CA gene were detected in genomic DNA extracted from formalin-fixed paraffin-embedded tumor blocks. Correlations between these biological markers and clinicopathological factors and prognosis were analyzed separately in pre- and postmenopausal women.
Results: Levels of AKT phospho-Ser473 were significantly higher in premenopausal women (n = 62) than in postmenopausal women (n = 152) (P < 0.0001 and P = 0.014, respectively). In contrast, expression levels of AR were significantly higher in postmenopausal women than in premenopausal women (P < 0.0001). In premenopausal women, 26 tumors (43%) had a single mutation of PIK3CA gene, and 3 tumors (5%) had mutations at two sites. In postmenopausal women, 64 tumors (44%) had a single PIK3CA mutation, 6 tumors (4%) had mutations at two sites, and one tumor (1%) had mutations at three sites. In premenopausal women, wild type PIK3CA was associated with smaller tumor size, higher ER expression levels, and lower AR expression levels when compared with women in the same cohort with PIK3CA mutant tumors. In postmenopausal women, patients with PIK3CA wild-type tumors had higher Ki67 labeling index, higher AKT phospho-Ser473, and lower ERα phospho-Ser167 when compared to patients with PIK3CA mutant tumors. Postmenopausal women with PIK3CA wild-type tumors had significantly worse disease-free survival than patients with PIK3CA mutant tumors (P = 0.007). In contrast, PIK3CA mutation status was not correlated with survival in premenopausal women. Low levels of AKT phospho-Ser473 and high levels of ERα phospho-Ser167 were strongly associated with increased disease-free survival in postmenopausal women (P = 0.016 and P = 0.0016, respectively).
Conclusion: ERα activation, in addition to PIK3CA mutation, may be biomarkers for highly endocrine-responsive tumors. This would facilitate the selection of postmenopausal ER-positive breast cancer patients who are likely to benefit from endocrine therapy alone from those who are not.
Citation Format: Ishida N, Hatanaka Y, Baba M, Hagio K, Okada H, Hatanaka KC, Matsuno Y, Yamashita H. PIK3CA mutation, reduced AKT serine 473 phosphorylation, and increased ERα serine 167 phosphorylation are positive prognostic indicators in postmenopausal estrogen receptor-positive, HER2-negative early breast cancer [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P4-08-07.
Collapse
Affiliation(s)
- N Ishida
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Y Hatanaka
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - M Baba
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - K Hagio
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - H Okada
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - KC Hatanaka
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Y Matsuno
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - H Yamashita
- Hokkaido University Hospital, Sapporo, Hokkaido, Japan; Research Division of Companion Diagnostics, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| |
Collapse
|
17
|
van Schaik IN, Bril V, van Geloven N, Hartung HP, Lewis RA, Sobue G, Lawo JP, Praus M, Mielke O, Durn BL, Cornblath DR, Merkies ISJ, Sabet A, George K, Roberts L, Carne R, Blum S, Henderson R, Van Damme P, Demeestere J, Larue S, D'Amour C, Bril V, Breiner A, Kunc P, Valis M, Sussova J, Kalous T, Talab R, Bednar M, Toomsoo T, Rubanovits I, Gross-Paju K, Sorro U, Saarela M, Auranen M, Pouget J, Attarian S, Le Masson G, Wielanek-Bachelet A, Desnuelle C, Delmont E, Clavelou P, Aufauvre D, Schmidt J, Zschuentssch J, Sommer C, Kramer D, Hoffmann O, Goerlitz C, Haas J, Chatzopoulos M, Yoon R, Gold R, Berlit P, Jaspert-Grehl A, Liebetanz D, Kutschenko A, Stangel M, Trebst C, Baum P, Bergh F, Klehmet J, Meisel A, Klostermann F, Oechtering J, Lehmann H, Schroeter M, Hagenacker T, Mueller D, Sperfeld A, Bethke F, Drory V, Algom A, Yarnitsky D, Murinson B, Di Muzio A, Ciccocioppo F, Sorbi S, Mata S, Schenone A, Grandis M, Lauria G, Cazzato D, Antonini G, Morino S, Cocito D, Zibetti M, Yokota T, Ohkubo T, Kanda T, Kawai M, Kaida K, Onoue H, Kuwabara S, Mori M, Iijima M, Ohyama K, Baba M, Tomiyama M, Nishiyama K, Akutsu T, Yokoyama K, Kanai K, van Schaik I, Eftimov F, Notermans N, Visser N, Faber C, Hoeijmakers J, Rejdak K, Chyrchel-Paszkiewicz U, Casanovas Pons C, Alberti Aguiló M, Gamez J, Figueras M, Marquez Infante C, Benitez Rivero S, Lunn M, Morrow J, Gosal D, Lavin T, Melamed I, Testori A, Ajroud-Driss S, Menichella D, Simpson E, Chi-Ho Lai E, Dimachkie M, Barohn R, Beydoun S, Johl H, Lange D, Shtilbans A, Muley S, Ladha S, Freimer M, Kissel J, Latov N, Chin R, Ubogu E, Mumfrey S, Rao T, MacDonald P, Sharma K, Gonzalez G, Allen J, Walk D, Hobson-Webb L, Gable K. Subcutaneous immunoglobulin for maintenance treatment in chronic inflammatory demyelinating polyneuropathy (PATH): a randomised, double-blind, placebo-controlled, phase 3 trial. Lancet Neurol 2018; 17:35-46. [DOI: 10.1016/s1474-4422(17)30378-2] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/28/2017] [Accepted: 10/02/2017] [Indexed: 10/18/2022]
|
18
|
Oshiro T, Baba M, Fujita M, Kaneko Y, Takeda S, Hirano R, Mawatari K, Ishibashi Y, Miyabayashi I. The association for knowledge for the effect of respiratory infection, preventive action, and prevention of exacerbation in patients with COPD. Respir Med 2017. [DOI: 10.1016/j.rmed.2017.07.034] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
19
|
Baba M, Aikou T, Natsugoe S, Kusano C, Shimada M, Nakano S, Fukumoto T, Yoshinaka H. Quality of life following esophagectomy with three-field lymphadenectomy for carcinoma, focusing on its relationship to vocal cord palsy. Dis Esophagus 2017; 11:28-34. [PMID: 29040479 DOI: 10.1093/dote/11.1.28] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [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: 12/11/2022]
Abstract
To clarify the quality of life of patients who underwent esophagectomy for carcinoma by right thoracotomy, laparotomy and cervical anastomosis, 116 patients who were cancer free at the time of mailing a questionnaire were analyzed. A significant decrease in vital capacity for 3 years postoperatively, as well as in the percentage of ideal body weight, between 3 and 5 years were observed in 57 patients with three-field lymphadenectomy. Patients' quality of life undergoing three-field dissection was worse than those with less radical lymphadenectomy (59 cases) in terms of the performance status and difficulty in talking at 60 months or more postoperatively. Around 20% of all patients reported severe hoarseness due to permanent recurrent nerve paralysis, resulting in poor quantity of food intake at 24 months or less postoperatively and restricted daily activity and difficulty in talking at 60 months or more after the operation. When a patient suffers from vocal cord insufficiency caused by permanent paralysis of the recurrent nerve, early treatment before discharge from the hospital should be performed to improve the quality of life of such a patient.
Collapse
Affiliation(s)
- M Baba
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| | - T Aikou
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| | - S Natsugoe
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| | - C Kusano
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| | - M Shimada
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| | - S Nakano
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| | - T Fukumoto
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| | - H Yoshinaka
- First Department of Surgery, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
| |
Collapse
|
20
|
Baba M, Suzuki C, Tomiyama M. Five-year prospective study on development of diabetic foot with a severity staging system of diabetic neuropathy by nerve conduction study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.768] [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: 11/24/2022]
|
21
|
Suzuki C, Kon T, Funamizu Y, Ueno T, Haga R, Nishijima H, Arai A, Nunomura J, Tomiyama M, Baba M, Mizukami H, Yagihashi S. Loss of intraepidermal nerve fibers in Guillan-Barre syndrome. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2406] [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: 10/18/2022]
|
22
|
Tomiyama M, Ueno T, Nishijima H, Kon T, Funamizu Y, Haga R, Arai A, Suzuki C, Nunomura J, Baba M. Driving license and car accident in patients with Parkinson’s disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2939] [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: 10/18/2022]
|
23
|
Kon T, Suzuki C, Hotta R, Nukada H, Baba M, Tomiyama M. Nerve conduction study for diagnosing injury in the superficial radial nerve. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3607] [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: 10/18/2022]
|
24
|
Baba M, Batanova T, Kitoh K, Takashima Y. Adhesion of Toxoplasma gondii tachyzoite-infected vehicle leukocytes to capillary endothelial cells triggers timely parasite egression. Sci Rep 2017; 7:5675. [PMID: 28720868 PMCID: PMC5515940 DOI: 10.1038/s41598-017-05956-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 06/07/2017] [Indexed: 12/15/2022] Open
Abstract
Intracellular pathogens have numerous strategies for effective dissemination within the host. Many intracellular pathogens first infect leukocytes, which they use as a vehicle to transport them to target organs. Once at the target organ, intracellular parasite Toxoplasma gondii can cross the capillary wall in extracellular form by infecting endothelial cells. However, after egression from leukocytes, extracellular parasites face the risk of host immune attack. In this study, observation of infected mouse organs, using a method that renders tissue transparent, revealed that adhesion of tachyzoite-infected leukocytes to endothelial cells triggers immediate egression of the parasite. This signal enables the parasite to time egression from its vehicle leukocyte to coincide with arrival at a target organ, minimizing the opportunity for immune attack during the transition from a vehicle leukocyte to capillary endothelial cells.
Collapse
Affiliation(s)
- Minami Baba
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Tatiana Batanova
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Katsuya Kitoh
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Yasuhiro Takashima
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
- Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), 1-1 Yanagido, Gifu, 501-1193, Japan.
| |
Collapse
|
25
|
Affiliation(s)
- V. M. Maslov
- Joint Institute for Nuclear and Energy Research 220109, Minsk-Sosny, Belarus
| | - Yu. V. Porodzinskij
- Joint Institute for Nuclear and Energy Research 220109, Minsk-Sosny, Belarus
| | - M. Baba
- Tohoku University, Cyclotron and Radioisotope Center, Sendai, Japan
| | - A. Hasegawa
- Japan Atomic Energy Research Institute, Department of Nuclear Energy System Tokai Research Establishment, Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| |
Collapse
|
26
|
Aoki T, Baba M, Yonai S, Kawata N, Hagiwara M, Miura T, Nakamura T. Measurement of Differential Thick-Target Neutron Yields of C, Al, Ta, W(p,xn) Reactions for 50-MeV Protons. NUCL SCI ENG 2017. [DOI: 10.13182/nse04-a2403] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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)
- T. Aoki
- Tohoku University, Cyclotron and Radioisotope Center Aramaki, Sendai 980-8578, Japan
| | - M. Baba
- Tohoku University, Cyclotron and Radioisotope Center Aramaki, Sendai 980-8578, Japan
| | - S. Yonai
- Tohoku University, Graduate School of Engineering Sendai 980-8578, Japan
| | - N. Kawata
- Tohoku University, Cyclotron and Radioisotope Center Aramaki, Sendai 980-8578, Japan
| | - M. Hagiwara
- Tohoku University, Cyclotron and Radioisotope Center Aramaki, Sendai 980-8578, Japan
| | - T. Miura
- Tohoku University, Cyclotron and Radioisotope Center Aramaki, Sendai 980-8578, Japan
| | - T. Nakamura
- Tohoku University, Graduate School of Engineering Sendai 980-8578, Japan
| |
Collapse
|
27
|
Hagiwara M, Itoga T, Kawata N, Hirabayashi N, Oishi T, Yamauchi T, Baba M, Sugimoto M, Muroga T. Measurement of Neutron Emission Spectra in Li(d,xn) Reaction with Thick and Thin Targets for 40-MeV Deuterons. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a1081] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Hagiwara
- Tohoku University Cyclotron and Radioisotope Center, Sendai 980-8578, Japan
| | - T. Itoga
- Tohoku University Cyclotron and Radioisotope Center, Sendai 980-8578, Japan
| | - N. Kawata
- Tohoku University Cyclotron and Radioisotope Center, Sendai 980-8578, Japan
| | - N. Hirabayashi
- Tohoku University Cyclotron and Radioisotope Center, Sendai 980-8578, Japan
| | - T. Oishi
- Tohoku University Cyclotron and Radioisotope Center, Sendai 980-8578, Japan
| | - T. Yamauchi
- Tohoku University Cyclotron and Radioisotope Center, Sendai 980-8578, Japan
| | - M. Baba
- Tohoku University Cyclotron and Radioisotope Center, Sendai 980-8578, Japan
| | - M. Sugimoto
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-1195, Japan
| | - T. Muroga
- National Institute for Fusion Science, Oroshi-cho, Toki, Gifu 509-5292, Japan
| |
Collapse
|
28
|
Otsubo R, Hirakawa H, Oikawa M, Inamasu E, Baba M, Matsumoto M, Yano H, Kinoshita N, Abe K, Fukuoka J, Nagayasu T. Abstract P2-01-31: Validation of novel diagnostic kits using the semi-dry dot-blot method for detecting metastatic lymph nodes in breast cancer; distinguishing macrometastases and micrometastases. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p2-01-31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The semi-dry dot-blot (SDB) method is a diagnostic procedure for detecting lymph node (LN) metastases. Metastases are confirmed by the presence of cytokeratin (CK) in lavage fluid of sectioned LNs that contain anti-pancytokeratin antibody, based on the theory that epithelial components such as CK are not found in normal LNs. We evaluated two novel SDB kits that use the newly developed anti-CK19 antibody for diagnosing LN metastases in breast cancer.
Methods: We obtained 159 LNs dissected from 93 breast cancer patients from July 2013 to December 2015 at Nagasaki University Hospital, including 38 dissected axillary LNs and 121 sentinel LNs, sliced at 2-mm intervals and washed with phosphate-buffered saline. The suspended cells in the lavage fluid of sliced LNs were centrifuged and lysed to extract protein. This extracted protein was used with a low-power and a high-power kit to diagnose LN metastasis. The washed LNs were blindly diagnosed by pathologists using hematoxylin and eosin (H&E) stain. Diagnoses based on the kit were compared with their H&E counterparts.
Results: Of the 159 LNs, 68 were assessed as positive and 91 as negative by permanent pathological examination with H&E. Sensitivity, specificity, and accuracy of the low-power kit for detecting LN metastases was 83.8%, 100%, and 93.1%, respectively. In 11 false-negative cases, there were nine micrometastases, producing a sensitivity of 96.4% for detecting macrometastases. Sensitivity, specificity, and accuracy of the high-power kit for detecting LN metastases was 92.6%, 92.3%, and 92.5%, respectively. Combining the low- and high-power kit results, sensitivity, specificity and accuracy for distinguishing macrometastases from micrometastases was 94.5%, 95.2%, and 95.0%, respectively. Diagnosis was achieved in approximately 20 min using the kits, at a cost of less than 25 USD.
Conclusions: The kits in our study were accurate, quick, and cost-effective in diagnosing LN metastases without the loss of LN tissue. The kits' ability to distinguish macrometastases from micrometastases was excellent, which is important, clinically.
Citation Format: Otsubo R, Hirakawa H, Oikawa M, Inamasu E, Baba M, Matsumoto M, Yano H, Kinoshita N, Abe K, Fukuoka J, Nagayasu T. Validation of novel diagnostic kits using the semi-dry dot-blot method for detecting metastatic lymph nodes in breast cancer; distinguishing macrometastases and micrometastases [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P2-01-31.
Collapse
Affiliation(s)
- R Otsubo
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - H Hirakawa
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - M Oikawa
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - E Inamasu
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - M Baba
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - M Matsumoto
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - H Yano
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - N Kinoshita
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - K Abe
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - J Fukuoka
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| | - T Nagayasu
- Nagasaki University Hospital, Nagasaki, Japan; Chiba Aiyuukai Memorial Hospital, Chiba, Japan; Nyuuwakai Oikawa Hospital, Fukuoka, Japan
| |
Collapse
|
29
|
Takahashi M, Nishiyama Y, Hara F, Naito Y, Baba M, Sasaki M, Sato M, Watanabe K, Uemura Y, Yamaguchi T, Mukai H. Abstract P4-21-03: A randomized phase II study of Ki-67 response-guided preoperative chemotherapy for HER2-positive breast cancer. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p4-21-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
As for the HER2-positive breast cancer, there are many cases to be effective for neoadjuvant chemotherapy in comparison with other intrinsic subtypes. However, pCR is not provided by neoadjuvant chemotherapy in all cases. [Aim] This study evaluated the effectiveness of a therapeutic strategy that switches chemotherapy, based on Ki-67 tumor expression after initial therapy, relative to that of standard chemotherapy in patients with HER2-positive breast cancer. [patients and methods] Patients were randomly assigned to the control arm or the Ki-67 response-guided arm (Ki-67 arm). Primary tumor biopsies were obtained before treatment, and after three once-weekly doses of paclitaxel and trastuzumab to assess the interim Ki-67 index. In the control arm, paclitaxel and trastuzumab was continued for a total of 12 doses, regardless of the interim Ki-67 index. In the Ki-67 arm, subsequent treatment was based on the interim Ki-67 index. Early Ki-67 responders continued to received paclitaxel plus trastuzumab for a total of 12 doses, while early Ki-67 non-responders were switched to epirubicin plus cyclophosphamide every 3 weeks for three cycles with once-weekly trastuzumab for a total of 12 doses. The primary endpoint was the pathological complete response (pCR) rate. [Results] When 237 patients were enrolled, an interim analysis was conducted in 200 patients. There was almost linear correlation between the Ki-67 reduction rate at interim assessment and the pCR rate. The pCR rate in Ki-67 early non-responders in the Ki-67 arm (23.6%; 95% CI, 12.4 to 34.9) was inferior to that in the control arm (44.1%; 31.4 to 56.7; p=0.025). A strong correlation was not found between the Ki-67 reduction rate and the clinical response rate (Spearman's correlation coefficient 0.22).
pCR rate among Ki-67 early non-responders and responders TotalpCR nn%95%CIKi-67 early non responderControl arm59264431.4-56.7 Ki-67 response guided arm55132312.4-34.9Ki-67 early responderControl arm21104726.3-69.0 Ki-67 response guided arm2084018.5-61.5
Conclusions: The pCR rate in the Ki-67 arm was inferior to that in the control arm. A therapeutic strategy that switches chemotherapy, based on Ki-67 tumor expression after initial therapy, was not effective. The standard chemotherapy protocol remains as the recommended strategy for patients with HER2-positive breast cancer.
Citation Format: Takahashi M, Nishiyama Y, Hara F, Naito Y, Baba M, Sasaki M, Sato M, Watanabe K, Uemura Y, Yamaguchi T, Mukai H. A randomized phase II study of Ki-67 response-guided preoperative chemotherapy for HER2-positive breast cancer [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P4-21-03.
Collapse
Affiliation(s)
- M Takahashi
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - Y Nishiyama
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - F Hara
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - Y Naito
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - M Baba
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - M Sasaki
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - M Sato
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - K Watanabe
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - Y Uemura
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - T Yamaguchi
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| | - H Mukai
- NHO Hokkaido Cancer Center, Sapporo, Hokkaido, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; NHO Shikoku Cancer Center, Matsuyama, Ehime, Japan; National Cancer Center Hospital East, Kashiwa, Chiba, Japan; University of Tokyo, Tokyo, Japan; Musashino Red Cross Hospital, Musashino, Tokyo, Japan
| |
Collapse
|
30
|
Gauci MO, Boileau P, Baba M, Chaoui J, Walch G. Patient-specific glenoid guides provide accuracy and reproducibility in total shoulder arthroplasty. Bone Joint J 2017; 98-B:1080-5. [PMID: 27482021 DOI: 10.1302/0301-620x.98b8.37257] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 03/08/2016] [Indexed: 11/05/2022]
Abstract
AIMS Patient-specific glenoid guides (PSGs) claim an improvement in accuracy and reproducibility of the positioning of components in total shoulder arthroplasty (TSA). The results have not yet been confirmed in a prospective clinical trial. Our aim was to assess whether the use of PSGs in patients with osteoarthritis of the shoulder would allow accurate and reliable implantation of the glenoid component. PATIENTS AND METHODS A total of 17 patients (three men and 14 women) with a mean age of 71 years (53 to 81) awaiting TSA were enrolled in the study. Pre- and post-operative version and inclination of the glenoid were measured on CT scans, using 3D planning automatic software. During surgery, a congruent 3D-printed PSG was applied onto the glenoid surface, thus determining the entry point and orientation of the central guide wire used for reaming the glenoid and the introduction of the component. Manual segmentation was performed on post-operative CT scans to compare the planned and the actual position of the entry point (mm) and orientation of the component (°). RESULTS The mean error in the accuracy of the entry point was -0.1 mm (standard deviation (sd) 1.4) in the horizontal plane, and 0.8 mm (sd 1.3) in the vertical plane. The mean error in the orientation of the glenoid component was 3.4° (sd 5.1°) for version and 1.8° (sd 5.3°) for inclination. CONCLUSION Pre-operative planning with automatic software and the use of PSGs provides accurate and reproducible positioning and orientation of the glenoid component in anatomical TSA. Cite this article: Bone Joint J 2016;98-B:1080-5.
Collapse
Affiliation(s)
- M O Gauci
- Hôpital Pasteur 2, 30 Voie Romaine, Nice, 06000, France
| | - P Boileau
- Hôpital Pasteur 2, 30 Voie Romaine, Nice, 06000, France
| | - M Baba
- Specialty Orthopaedics, Sydney, Australia
| | - J Chaoui
- Telecom Brittany, 655 Avenue du Technopole, 29200 Plouzané, France
| | - G Walch
- Centre Orthopédique Santy, Unité Epaule, 24 Avenue Paul Santy, 69008 Lyon, France
| |
Collapse
|
31
|
Uneno Y, Baba M, Kanai M, Taneishi K, Nakatsui M, Okuno Y, Muto M, Morita T. 484O_PR Validation of the set of six adaptable prognosis prediction (SAP) models for cancer patients in palliative care settings: A sub analysis of the Japan-prognostic assessment tools validation (J-ProVal) study. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw595] [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
|
32
|
Tanaka H, Walker RT, Hopkins AL, Ren J, Jones EY, Fujimoto K, Hayashi M, Miyasaka T, Baba M, Stammers DK, Stuart DI. Allosteric Inhibitors against HIV-1 Reverse Transcriptase: Design and Synthesis of MKC-442 Analogues Having an Ω-Functionalized Acyclic Structure. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029800900404] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Based on X-ray crystallographic analysis of MKC-442/human immunodeficiency virus type 1 reverse transcriptase (HIV-1 RT) complex, analogues in which the N1-substituent is replaced with ω-functionalized alkyl groups were designed to improve the affinity for the enzyme. Synthesis of these compounds was carried out starting from MKC-442 by a sequence of reactions (N3-protection, removal of N1-ethoxymethyl group, alkylation, and N3-deprotection). The compounds were evaluated for anti-HIV activity. Structure–activity relationships are discussed in terms of the possible interaction with the enzyme.
Collapse
Affiliation(s)
- H Tanaka
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142, Japan
| | - RT Walker
- School of Chemistry, The University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - AL Hopkins
- The Laboratory of Molecular Biophysics, Rex Richards Building, South Parks Road, Oxford OX1 3QU, UK
| | - J Ren
- The Laboratory of Molecular Biophysics, Rex Richards Building, South Parks Road, Oxford OX1 3QU, UK
| | - EY Jones
- The Laboratory of Molecular Biophysics, Rex Richards Building, South Parks Road, Oxford OX1 3QU, UK
- The Oxford Centre for Molecular Sciences, New Chemistry Building, South Parks Road, Oxford OX1 3QT, UK
| | - K Fujimoto
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142, Japan
| | - M Hayashi
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142, Japan
| | - T Miyasaka
- School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142, Japan
| | - M Baba
- Division of Human Retroviruses, Center for Chronic Viral Diseases, Faculty of Medicine, Kagoshima University, Kagoshima 890, Japan
| | - DK Stammers
- The Laboratory of Molecular Biophysics, Rex Richards Building, South Parks Road, Oxford OX1 3QU, UK
| | - DI Stuart
- The Laboratory of Molecular Biophysics, Rex Richards Building, South Parks Road, Oxford OX1 3QU, UK
- The Oxford Centre for Molecular Sciences, New Chemistry Building, South Parks Road, Oxford OX1 3QT, UK
| |
Collapse
|
33
|
Tárkányi F, Ditrói F, Takács S, Hermanne A, Baba M. Activation cross sections of proton and deuteron induced nuclear reactions on holmium and erbium, related to the production of (161)Er and (160)Er medical isotopes. Appl Radiat Isot 2016; 115:262-266. [PMID: 27451109 DOI: 10.1016/j.apradiso.2016.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 05/09/2016] [Revised: 06/17/2016] [Accepted: 07/05/2016] [Indexed: 10/21/2022]
Abstract
Experimental excitation functions for long-lived products in proton induced reactions were measured with the activation method in the 37-65MeV energy range on natural holmium. Stacked foil irradiation technique and high resolution gamma spectrometry were used in order to measure cross-section data for the production of (161)Er, (160)Er and (1)(59,157)Dy. For comparison of the production routes of medically related (161)Er and (160)Er radioisotopes new experimental cross section data were deduced for the (162)Er(p,x)(161,160)Er and (162)Er(d,x)(161,160)Er reactions by re-evaluating gamma-ray spectra from earlier measurements. No earlier data were found in the literature for these reactions. The experimental data are compared with results of TALYS theoretical code reported in TENDL-2015.
Collapse
Affiliation(s)
- F Tárkányi
- Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Hungary
| | - F Ditrói
- Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Hungary.
| | - S Takács
- Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Hungary
| | - A Hermanne
- Vrije Universiteit Brussel (VUB), Cyclotron Laboratory, 1090 Brussels, Belgium
| | - M Baba
- Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai 980-8578, Japan
| |
Collapse
|
34
|
Ali MW, Alauddin M, Azad MTA, Hasan MA, Appiah-Kwarteng C, Takasu M, Baba M, Kitoh K, Rahman M, Takashima Y. Theileria annulata seroprevalence among different cattle breeds in Rajshahi Division, Bangladesh. J Vet Med Sci 2016; 78:1577-1582. [PMID: 27396398 PMCID: PMC5095627 DOI: 10.1292/jvms.16-0080] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
An epidemiological survey of Theileria annulata infection was undertaken in a cattle population in Rajshahi Division, Bangladesh. The local
cattle breeds from the area (North Bengal Gray and Deshi) and crosses between the local breeds and Holstein cattle were predominantly screened. In total, 192
cattle serum samples were collected in two areas of Rajshahi Division, the Rajshahi District (n=147) and Natore District (n=45). The samples were screened with
an enzyme-linked immunosorbent assay using T. annulata surface protein (TaSP) as the antigen. The seroprevalence was 80.0%
(36/45) in Natore and 20.4% (30/147) in Rajshahi. A logistic regression analysis showed that the sampling location was significantly associated with
seropositivity, whereas age, sex and breed were not. Although the logistic regression analysis did not show a linear dependence on age, we considered
age-specific seroprevalence separately in the two districts. Seroprevalence did not differ significantly among age categories in the Natore District. In
contrast, all the cattle <1 year old in the Rajshahi District were seronegative (11/11). Seroprevalence in the 1- and 2-year-old cattle was significantly
lower in the Rajshahi District than in the Natore District. In the older age categories (3, 4 and >5 years), seroprevalence did not differ significantly
between the Natore and Rajshahi Districts. These results suggest that the cattle in the Rajshahi District were sporadically exposed to T.
annulata, whereas most cattle in the Natore District became infected during an early phase of life.
Collapse
Affiliation(s)
- Md Wajed Ali
- Department of Animal Husbandry and Veterinary Science, Faculty of Agriculture, University of Rajshahi, Rajshahi-6205, Bangladesh
| | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Mohan P, Hopfinger AJ, Baba M. Naphthalenesulphonic Acid Derivatives as Potential anti-HIV-1 Agents. Chemistry, Biology and Molecular Modelling of Their Inhibition of Reverse Transcriptase. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029100200402] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Activity against human immunodeficiency virus (HIV) in the naphthalenesulphonic acid series is most pronounced in the disulphonic acid series. In this class of compounds, N-acyl derivatives of 4-amino-5-hydroxy-2,7-naphthalenedisulphonic acid demonstrate significant anti-HIV activity at non-toxic doses. The most potent compounds in this group of agents are bis naphthalenedisulphonic acids. A bis derivative containing a decamethylene spacer demonstrated activity against HIV-1, HIV-2 giant cell formation and reverse transcriptase (RT). This compound also demonstrated an in vitro therapeutic index (ratio of 50% cytotoxic concentration to 50% inhibitory antiviral concentration) of 10.6. Molecular modelling analyses of this agent, suramin, and several suramin analogues were undertaken to explain the potent anti-HIV-1 RT activity. These studies were carried out using the molecular decomposition/recomposition strategy, conformational searching, energy minimization and molecular dynamics (MD) simulation. The bis naphthalenedisulphonic acid derivative compound 1, having a flexible decamethylene spacer, was shown to be able to mimic the helical twist of the B-DNA backbone as a low energy conformer state.
Collapse
Affiliation(s)
- P. Mohan
- Department of Medicinal Chemistry and Pharmacognosy (M/C 781), College of Pharmacy, University of Illinois at Chicago, Box 6998, Chicago, IL 60680, USA
| | - A. J. Hopfinger
- Department of Medicinal Chemistry and Pharmacognosy (M/C 781), College of Pharmacy, University of Illinois at Chicago, Box 6998, Chicago, IL 60680, USA
| | - M. Baba
- Department of Microbiology, Fukushima Medical College, Hikarigaoka 1, Fukushima 960-12, Japan
| |
Collapse
|
36
|
Schols D, De Clercq E, Balzarini J, Baba M, Witvrouw M, Hosoya M, Andrei G, Snoeck R, Neyts J, Pauwels R, Nagy M, Györgyi-Edelényi J, Machovich R, Horváth I, Low M, Görög S. Sulphated Polymers are Potent and Selective Inhibitors of Various Enveloped Viruses, Including Herpes Simplex Virus, Cytomegalovirus, Vesicular Stomatitis Virus, Respiratory Syncytial Virus, and Toga-, Arena- and Retroviruses. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029000100402] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The sulphated polymers, such as polyvinylalcohol sulphate (PVAS) and its co-polymer with acrylic acid (PAVAS), have proved to be potent inhibitors for herpes simplex virus, human cytomegalovirus, vesicular stomatitis virus, respiratory syncytial virus, Sindbis virus, Semliki Forest virus, Junin virus, Tacaribe virus, murine sarcoma virus and human immunodeficiency virus. They are not inhibitory to non-enveloped viruses, such as poliovirus and reovirus. The broad-spectrum antiviral effects of these compounds depend on their molecular weight and degree of sulphation. Pharmacokinetic studies in rabbits have indicated that after intravenous bolus injection the serum concentrations of these compounds decay biphasically, with an initial half-life of approximately 90–120 min.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - M. Nagy
- Department of Colloid Science, Eötvös Loránd University, Budapest, Hungary
| | | | - R. Machovich
- 2nd Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary
| | - I. Horváth
- 2nd Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary
| | - M. Low
- Chemical Works of Gedeon Richter Ltd, Budapest, Hungary
| | - S. Görög
- Chemical Works of Gedeon Richter Ltd, Budapest, Hungary
| |
Collapse
|
37
|
Hashimoto K, Kodama E, Mori S, Watanabe J, Baba M, Okutani K, Matsuda M, Shigeta S. Antiviral Activity of a Sulphated Polysaccharide Extracted from the Marine Pseudomonas and Marine Plant Dinoflagellata against Human Immunodeficiency Viruses and other Enveloped Viruses. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029600700403] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A natural sulphated mucopolysaccharide (OKU40), extracted from a marine plant Dinoflagellata, and an artificial sulphated polysaccharide (OKU41), prepared from a marine Pseudomonas, displayed antiviral activities against several enveloped viruses. OKU40 and OKU41 were found to be homogenous in electrophoresis and sedimation velocity and had a molecular weight of 8.0 × 1065.0 × 105respectively. The sulphation rate of OKU40 and OKU41 was 8.9% and 5.4%, respectively. Each OKU40 and OKU41 inhibited the cytopathic effect of human immunodeficiency virus type 1 (HIV-1), type 2 (HIV-2) and zidovudineresistant HIV-1 in MT-4 cells at similar concentrations to those of dextran sulphate (molecular weight: 5000) (50% inhibitory concentrations: 0.86-1.95 μg mL−1), whereas these compounds did not affect the growth and viability of mock-infected MT-4 cells at concentrations up to 500 μg mL−1. These compounds proved inhibitory not only to HIV-1 and HIV-2 but also to other enveloped viruses, i.e. herpes simplex virus type 1, influenza virus A and B, respiratory syncytial virus and measles virus. OKU40 and OKU41 suppressed syncytium formation induced by cocultivation of MOLT-4/IIIb and MOLT-4 cells at concentrations higher than 20 μg mL−1. Although OKU41 inhibited the binding of HIV-1 to the host cells and the binding of anti-gp120 monoclonal antibody to HIV-1 gp120, OKU40 did not inhibit these bindings, suggesting that the mechanism of anti-HIV activity of OKU40 and OKU41 may be primarily due to the inhibition of virus-cell fusion and viral adsorption to the host cells, respectively. Furthermore, these compounds did not inhibit to the blood coagulation process at a concentration that was significantly inhibitory to HIV replication. The compounds appear to have an interesting potential as virucidal agents.
Collapse
Affiliation(s)
- K. Hashimoto
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - E. Kodama
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - S. Mori
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - J. Watanabe
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - M. Baba
- Division of Human Retroviruses, Centre for Chronic Viral Diseases, Faculty of Medicine, Kagoshima University, Kagoshima 890, Japan
| | - K. Okutani
- Faculty of Agriculture, Kagawa University, Kagawa 761-07, Japan
| | - M. Matsuda
- Faculty of Agriculture, Kagawa University, Kagawa 761-07, Japan
| | - S. Shigeta
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| |
Collapse
|
38
|
Shigeta S, Mori S, Baba M, Hosoya M, Mochizuki N, Chiba T, De Clercq E. Inhibitory Effect of Pyridobenzoazoles on Orthomyxo-and Paramyxovirus Replication in vitro. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029200300307] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Among thirteen newly synthesized pyridobenzoazole derivatives which have been examined for anti-myxovirus and antiherpesvirus activities, three benzimidazoles emerged as potent anti-orthomyxo- or paramyxovirus compounds. 4-Cyano-2-benzamide-1-oxo-1,5-dihydropyrido[1,2a]benzimidazole (CBO-PB) showed broad antiviral activities against paramyxo-and orthomyxoviruses with EC50 of 0.1–2.0 μg ml−1, and 2-cyano-1-amino derivatives of CBO-PB (CCI-PB) were inhibitory to paramyxoviruses at 1.4–8.5 (μg ml−1 by a plaque reduction method. The third compound, 2-ethoxycarbonyl derivatives of CCI-PB was inhibitory only to respiratory syncytial virus (RSV) at 15–28 μg ml−1. Selectivity indexes of these 3 compounds for RSV in HeLa cells were 60, 86, and >13, respectively. All three compounds inhibited syncytium formation of RSV and Parainfluenzavirus (PFLUV) type 3 at comparable concentrations with EC50 for plaque formation. They inhibited antigen production of RSV and PFLUV at the concentrations that were 4 to 20-fold higher than those needed for plaque reduction, but they did not inhibit adsorption of virus to cells at all. All three compounds inhibited the growth of RSV in HeLa cells at 4-fold higher concentrations than their EC50 for plaque reduction.
Collapse
Affiliation(s)
- S. Shigeta
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - S. Mori
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - M. Baba
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - M. Hosoya
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - N. Mochizuki
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - T. Chiba
- Pharmaceutical Institute, Tohoku University, Sendai 980, Japan
| | - E. De Clercq
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| |
Collapse
|
39
|
Ito M, Baba M, Shigeta S, Wada S, Takagi M, Kimura T, Okuyama T. Potent and Selective Activity of Dextrin Sulphate against Human Immunodeficiency Virus Type 1 in vitro. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029100200107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Several dextrin sulphate derivatives were prepared and investigated for their activity against human immunodeficiency virus type 1 (HIV-1) in vitro. These compounds have proved to be potent and selective inhibitors of HIV-1. One of the compounds, termed FG-752 [molecular weight (MW) 3000], was the most active, and its 50% antiviral effective concentration was 2.1 μg ml−1 (0.7 μm) in MT-4 cells. No toxicity for the cells was observed at a concentration of 500 μg ml−1. The compounds were also inhibitory to HIV-1-induced giant cell (syncytium) formation. These results suggest that dextrin sulphate may be useful for the chemotherapy of HIV-1 infections.
Collapse
Affiliation(s)
- M. Ito
- Department of Bacteriology, Fukushima Medical College, Fukushima 960–12, Japan
| | - M. Baba
- Department of Bacteriology, Fukushima Medical College, Fukushima 960–12, Japan
| | - S. Shigeta
- Department of Bacteriology, Fukushima Medical College, Fukushima 960–12, Japan
| | - S. Wada
- Central Research Laboratories, Chugai Pharmaceutical Co Ltd, Toshima-ku, Tokyo 171, Japan
| | - M. Takagi
- Central Research Laboratories, Chugai Pharmaceutical Co Ltd, Toshima-ku, Tokyo 171, Japan
| | - T. Kimura
- Central Research Laboratories, Chugai Pharmaceutical Co Ltd, Toshima-ku, Tokyo 171, Japan
| | - T. Okuyama
- Central Research Laboratories, Chugai Pharmaceutical Co Ltd, Toshima-ku, Tokyo 171, Japan
| |
Collapse
|
40
|
Shigeta S, Mori S, Watanabe J, Baba M, Khenkin AM, Hill CL, Schinazi RF. In vitro Antimyxovirus and Anti-Human Immunodeficiency Virus Activities of Polyoxometalates. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029500600206] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Polyoxometalates have been shown to inhibit the replication of retro-, toga-, paramyxo- and herpesviruses. The primary mechanism of the anti-human immunodeficiency virus type 1 (HIV-1) action of polyoxometalates seems to be inhibition of binding of virus to cells and inhibition of syncytium formation. Since myxoviruses and HIV-1 are known to interact with the cytoplasmic membrane by adsorption and penetration of virus and by fusion of infected and uninfected cells, 25 polyoxometalates were examined for anti-ortho-, anti-paramyxovirus and anti-HIV-1 activity in vitro. Of the 25 compounds evaluated, 24 showed antiviral effects against influenza virus A, 11 showed activity against respiratory syncytial virus, six showed activity against measles virus, and 23 were considered effective against HIV-1 at a lower concentration than that producing cytotoxicity. Four polyoxotungstates which had potent inhibitory effects were examined for inhibitory effects against additional ortho- and paramyxoviruses, and proved to have a broad spectrum of antimyxoviral activity. HS-058, the Keggin sandwich compound K10Fe4(H2O)2(PW9O34)2·nH2O, was inhibitory against influenza viruses A and B, respiratory syncytial virus, measles virus, and parainfluenza virus 2, with median effective concentrations of 1.4, 21.8, 7.4, 0.8 and 0.32 μ,M, respectively. However, HS-058 had no effect on parainfluenza virus 3 or mumps virus. The median cytotoxic concentration of HS-058 for Madin-Darby canine kidney (MDCK) and HEp-2 cells was more than 200 μM and that for HMV-2 and Vero cells was about 50 μM. When HS-058 was added at different times after influenza A and respiratory syncytial virus infection, it inhibited binding of the latter but not of the former to cells. However, at higher concentrations, HS-054 and HS-058 inhibited haemolysis of chick erythrocytes by influenza virus and syncytium formation involving respiratory syncytial virus-infected cells and uninfected cells. Four times the median effective antiviral concentration of HS-058 completely inhibited the growth of influenza virus A in MDCK cells when compound was added before virus adsorption. Furthermore, when HS-058 was added after virus adsorption, it inhibited the yield of virus in MDCK cells infected at low but not at high multiplicity of infection.
Collapse
Affiliation(s)
- S. Shigeta
- Department of Microbiology, Fukushima Medical College, Fukushima, 960-12, Japan
| | - S. Mori
- Department of Microbiology, Fukushima Medical College, Fukushima, 960-12, Japan
| | - J. Watanabe
- Department of Microbiology, Fukushima Medical College, Fukushima, 960-12, Japan
| | - M. Baba
- Department of Microbiology, Fukushima Medical College, Fukushima, 960-12, Japan
| | - A. M. Khenkin
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
| | - C. L. Hill
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
| | - R. F. Schinazi
- Department of Pediatrics, Emory University, Atlanta, GA 30322, USA
- Veterans Affairs Medical Center, Medical Research 151, 1670 Clairmont Road, Decatur, GA 30033, USA
| |
Collapse
|
41
|
Kosugi Y, Saito Y, Mori S, Watanabe J, Baba M, Shigeta S. Antiviral Activities of Mizoribine and other Inosine Monophosphate Dehydrogenase Inhibitors against Several Ortho- and Paramyxoviruses. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029400500603] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Mizoribine (4-carbamoyl-1-β-D-ribofuranosylimidazo-lelium-5-olate), EICAR (5-ethynyl-1-β-D-ribofuranosylimi-dazole-4-carboxamide), mycophenolic acid and ribavirin are antiviral agents targeted for inosine monophosphate (IMP) dehydrogenase. These compounds have been examined for their activities against orthomyxoviruses [influenza viruses (FluV)] and paramyxoviruses [parainfluenza viruses (PFIuV), mumps virus, measles virus (MLSV) and respiratory syncytial virus (RSV)] in vitro. Mizoribine was 1- to 9-fold more active than ribavirin against RSV, PFIuV and MLSV. EICAR and mycophenolic acid showed higher potency than mizoribine and ribavirin against all myxoviruses examined. None of the four compounds examined proved cytotoxic to stationary host cells (HeLa, Vero and MDCK) at a concentration of 200 μg ml−1 or more. On the other hand, EICAR and mycophenolic acid were toxic to rapidly growing cells at concentrations of 2.2-9 and 0.1-1.1 μg ml−1, respectively. Mizoribine and ribavirin showed cytotoxicity to the growing cells at higher concentrations (12-51 μg ml−1). The antiviral activities of mizoribine against FluV and RSV were reversed by 25-100 μm of each of guanosine and guanosine monophosphate (GMP). The antiviral activity of ribavirin against FluV was reversed by 25 μg of each of guanosine and GMP, while its activity against RSV was reversed by ≥ 100 μm of each of these compounds. Neither xanthosine nor xanthosine monophosphate (XMP) reversed the antiviral effects of mizoribine and ribavirin at concentrations of 300 μM. Concentrations 9 times higher than the median effective doses (EC50) of mizoribine and ribavirin inhibited the growth of RSV in HeLa cells as determined in an assay of infectious virus yield. Mizoribin should be further pursued as a candidate drug for the treatment of ortho- and paramyxovirus infections.
Collapse
Affiliation(s)
- Y. Kosugi
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - Y. Saito
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
- Life Science Institutes, Asahi Chemical Industry Co., LTD, Ohito, Shizuoka 410-23, Japan
| | - S. Mori
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - J. Watanabe
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - M. Baba
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - S. Shigeta
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| |
Collapse
|
42
|
Seki M, Sadakata Y, Yuasa S, Baba M. Isolation and Characterization of Human Immunodeficiency Virus Type-1 Mutants Resistant to the Non-Nucleotide Reverse Transcriptase Inhibitor MKC-442. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029500600201] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
MKC-442, 6-benzy 1-1-ethoxymethyl-5-isopropyIuraciI (l-EBU), is a potent and selective non-nucleoside inhibitor of human immunodeficiency virus type-1 (HIV-1) reverse transcriptase (RT). Nevirapine, another non-nucleoside RT inhibitor (NNRTI), is associated with rapid emergence of drug-resistant variants during in vitro passages of HIV-1. The emergence of resistant viruses to MKC-442 or nevirapine was examined in vitro. MT-4 cells infected with a clinical isolate (HE) of HIV-1 were cultivated in medium containing excess concentrations of these drugs, and the drug susceptibilities of the breakthrough viruses recovered from the medium were measured. Although nevirapine lost its antiviral activity after six passages, a delay in the emergence of fully resistant viruses was observed for MKC-442. Two resistant clones for each drug were isolated and nucleotide sequences within the RT region were analysed. An amino acid substitution at position 181 (Tyr to Cys) was found, with additional substitutions at positions 103 (Lys to Arg) and 108 (Val to lle) in the MKC-442-resistant viruses. These clones showed various susceptibilities to MKC-442, and cross-resistance to other NNRTIs but not to AZT. These results suggest that the major binding site of MKC-442 on the HIV-1 RT is the tyrosine residue common to these NNRTIs, and that drug resistance to NNRTIs is dependent on both the quality and the quantity of mutations within the HIV-1 RT gene.
Collapse
Affiliation(s)
- M. Seki
- Laboratory of Bioscience, Research Center, Mitsubishi Kasei Corp., 1000 Kamoshida-Cho, Midori-Ku, Yokohama 227, Japan
| | - Y. Sadakata
- Laboratory of Pharmaceuticals, Research Center, Mitsubishi Kasei Corp., 1000 Kamoshida-Cho, Midori-Ku, Yokohama 227, Japan
| | - S. Yuasa
- Laboratory of Pharmaceuticals, Research Center, Mitsubishi Kasei Corp., 1000 Kamoshida-Cho, Midori-Ku, Yokohama 227, Japan
| | - M. Baba
- Center for Chronic viral Diseases, Faculty of Medicine, Kagoshima University, Kagoshima 890, Japan
| |
Collapse
|
43
|
Baba M, Schols D, Mohan P, De Clercq E, Shigeta S. Inhibition of HIV-1-Induced Cytopathogenicity, Syncytium Formation, and Virus-Cell Binding by Naphthalenedisulphonic Acids through Interaction with the Viral Envelope gp120 Glycoprotein. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029300400405] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Bis-naphthalenedisulphonic acid derivatives with a biphenyl spacer, 4,4′-[4,4′-biphenyldiylbis(sulphonyl-amino)]bis(5-hydroxy-2,7-naphthalenedisulphonic acid) and 3,3′-[4,4′-biphenyldiylbis(sulphonyl-amino)]bis(1,5-naphthalenedisulphonic acid), have previously been reported as potent and selective inhibitors of human immunodeficiency virus type 1 (HIV-1) replication in cell culture. These compounds have also proved inhibitory to syncytium formation in cocultures of MOLT-4 cells with HIV-1-infected HUT-78 cells. They also inhibit the binding of HIV-1 virions to MT-4 cells as determined by a flow cytometric (FACS) method. Further studies on their mechanism of action by the FACS have revealed that the compounds inhibit the binding of anti-gp120 monoclonal antibody to the viral envelope glycoprotein gp120. Binding of OKT4A/Leu3a monoclonal antibody to the cellular CD4 receptor is not affected by the compounds. These results suggest that the anti-HIV-1 activity of the naphthalenedisulphonic acid derivatives can be attributed to inhibition of the gp120-CD4 interaction through binding of the compounds to the viral gp120 antigen.
Collapse
Affiliation(s)
- M. Baba
- Department of Microbiology, Fukushima Medical College, Hikarigaoka 1, Fukushima 960-12, Japan
| | - D. Schols
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - P. Mohan
- Department of Medicinal Chemistry and Pharmacognosy (M/C 781), College of Pharmacy, University of Illinois at Chicago, Box 6998, Chicago, IL, 60680, USA
| | - E. De Clercq
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - S. Shigeta
- Department of Microbiology, Fukushima Medical College, Hikarigaoka 1, Fukushima 960-12, Japan
| |
Collapse
|
44
|
Fujiwara M, Ijichi K, Tokuhisa K, Katsuura K, Wang GYS, Uemura D, Shigeta S, Konno K, Yokota T, Baba M. Ingenol Derivatives are Highly Potent and Selective Inhibitors of HIV Replication in Vitro. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029600700502] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ingenol 3,5,20-triacetate has recently been identified as a highly potent and selective inhibitor of HIV replication in vitro. To evaluate the potential of ingenol derivatives as anti-HIV agents, several ingenol derivatives have been synthesized and investigated for their anti-HIV activities, structure-activity relationships, and possible mechanisms of action. Among the ingenol derivatives, 13-hydroxyingenol-3-(2,3-dimethylbutanoate)-13-dodecanoate (RD4-2138) proved to be a highly potent and selective inhibitor of HIV replication. Its 50% effective concentration for viral replication in MT-4 cells was 0.07-0.5 nM depending on viral strains, including HIV-2. This concentration was approximately 105-fold lower than its cytotoxic threshold. RD4-2138 was also inhibitory to the syncytium formation induced by cocultivation of Molt-4 cells with Molt-4/IIIB cells (Molt-4 cells chronically infected with HIV-1). Some correlation was observed with the ingenol derivatives between their inhibitory effects on HTLV-IIIB replication and surface CD4 expression in MT-4 cells, suggesting that the mechanism of inhibition is in part attributed to the inhibition of virus adsorption through down-regulation of CD4 molecules in the host cells. However, such correlation was not identified between the inhibition of HTLV-IIIB and the activation of protein kinase C. Thus, they might have a potential as effective anti-HIV agents when toxicity in vivo could be elucidated.
Collapse
Affiliation(s)
- M. Fujiwara
- Rational Drug Design Laboratories, Matsukawa-machi, Fukushima 960-12, Japan
| | - K. Ijichi
- Rational Drug Design Laboratories, Matsukawa-machi, Fukushima 960-12, Japan
| | - K. Tokuhisa
- Tokyo Research Laboratory, Tosoh Co, Ltd, Ayase, Kanagawa 252, Japan
| | - K. Katsuura
- Tokyo Research Laboratory, Tosoh Co, Ltd, Ayase, Kanagawa 252, Japan
| | - G.-Y.-S. Wang
- Faculty of Liberal Arts, Shizuoka University, Ohya, Shizuoka 422, Japan
| | - D. Uemura
- Faculty of Liberal Arts, Shizuoka University, Ohya, Shizuoka 422, Japan
- Sagami Chemical Research Centre, Sagamihara, Kanagawa 229, Japan
| | - S. Shigeta
- Department of Microbiology, Fukushima Medical College, Hikarigaoka, Fukushima 960-12, Japan
| | - K. Konno
- Rational Drug Design Laboratories, Matsukawa-machi, Fukushima 960-12, Japan
| | - T. Yokota
- Rational Drug Design Laboratories, Matsukawa-machi, Fukushima 960-12, Japan
| | - M. Baba
- Division of Human Retroviruses, Centre for Chronic Viral Diseases, Faculty of Medicine, Kagoshima University, Sakuragaoka, Kagoshima 890, Japan
| |
Collapse
|
45
|
Tárkányi F, Ditrói F, Takács S, Csikai J, Hermanne A, Uddin MS, Baba M. Activation cross sections of proton induced nuclear reactions on palladium up to 80MeV. Appl Radiat Isot 2016; 114:128-44. [PMID: 27235887 DOI: 10.1016/j.apradiso.2016.05.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/19/2016] [Accepted: 05/17/2016] [Indexed: 11/18/2022]
Abstract
Activation cross sections of proton induced nuclear reactions on palladium were measured up to 80MeV by using the stacked foil irradiation technique and gamma ray spectrometry. The beam intensity, the incident energy and the energy degradation were controlled by a method based on flux constancy via normalization to the excitation functions of monitor reactions measured in parallel. Excitation functions for direct and cumulative cross-sections were measured for the production of (104m,104g,105g,106m,110m)Ag, (100,101)Pd, (99m,99g,100,101m,101g,102m,102g,105)Rh and (103,97)Ru radioisotopes. The cross section data were compared with the theoretical predictions of TENDL-2014 and -2015 libraries. For practical applications thick target yields were derived from the measured excitation functions. Application in the field of medical radionuclide production is shortly discussed.
Collapse
Affiliation(s)
- F Tárkányi
- Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary
| | - F Ditrói
- Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary.
| | - S Takács
- Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary
| | - J Csikai
- Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary
| | - A Hermanne
- Cyclotron Laboratory, Vrije Universiteit Brussel, Brussels, Belgium
| | - M S Uddin
- Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | - M Baba
- Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| |
Collapse
|
46
|
Baba M, Kitoh K, Takashima Y. Removal of extracellular Toxoplasma gondii tachyzoites from suspended cell culture. Parasitol Int 2016; 65:536-538. [PMID: 26806654 DOI: 10.1016/j.parint.2016.01.012] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 12/29/2015] [Accepted: 01/20/2016] [Indexed: 11/26/2022]
Abstract
Tachyzoites of Toxoplasma gondii, an obligate intracellular parasite, actively invade a broad spectrum of cell types. T. gondii infects leukocytes and spreads to distant organs such as the brain, lungs and muscles. However, the mechanism of T. gondii transmission from infected leukocytes to peripheral organs is unknown. To show the dynamics of infected leukocytes and intracellular parasites in vivo, previous studies have prepared T. gondii-infected leukocytes and injected them into circulation in experimental animals. However, when the infected leukocytes are prepared in vitro, some extracellular tachyzoites remain in the leukocyte cell culture because it is almost impossible to wash out these extracellular tachyzoites. These extracellular tachyzoites may distort experimental results. In this study, we report a method for removing extracellular tachyzoites from leukocyte culture suspension using antibody-conjugated magnetic beads. Using this method, extracellular tachyzoites in suspension cell culture can be effectively eliminated.
Collapse
Affiliation(s)
- Minami Baba
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Katsuya Kitoh
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yasuhiro Takashima
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| |
Collapse
|
47
|
Tárkányi F, Ditrói F, Takács S, Hermanne A, Baba M, Ignatyuk AV. Excitation functions for (d,x) reactions on (133)Cs up to Ed=40MeV. Appl Radiat Isot 2016; 110:109-117. [PMID: 26773822 DOI: 10.1016/j.apradiso.2016.01.007] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 12/16/2015] [Accepted: 01/05/2016] [Indexed: 10/22/2022]
Abstract
In the frame of a systematic study of excitation functions of deuteron induced reactions the excitation functions of the (133)Cs(d,x)(133m,133mg,131mg)Ba,(134,)(132)Cs and (12)(9m)Xe nuclear reactions were measured up to 40MeV deuteron energies by using the stacked foil irradiation technique and γ-ray spectroscopy of activated samples. The results were compared with calculations performed with the theoretical nuclear reaction codes ALICE-IPPE-D, EMPIRE II-D and TALYS calculation listed in the TENDL-2014 library. A moderate agreement was obtained. Based on the integral yields deduced from our measured cross sections, production of (131)Cs via the (133)Cs(d,4n)(131)Ba→(131)Cs reaction and (133)Ba via (133)Cs(d,2n) reactions is discussed in comparison with other charged particle production routes.
Collapse
Affiliation(s)
- F Tárkányi
- Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary
| | - F Ditrói
- Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary.
| | - S Takács
- Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary
| | - A Hermanne
- Cyclotron Laboratory, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - M Baba
- Cyclotron Radioisotope Center (CYRIC), Tohoku University, Sendai, Japan
| | - A V Ignatyuk
- Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
| |
Collapse
|
48
|
Tomiyama M, Funamizu Y, Kon T, Ueno T, Nishijima H, Haga R, Arai A, Suzuki C, Nunomura J, Baba M. Serotonin and noradrenaline reuptake inhibitor duloxetine reduces daily off time in Parkinson’s disease. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.1012] [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: 10/22/2022]
|
49
|
Amano K, Maeda I, Morita T, Miura T, Inoue S, Ikenaga M, Matsumoto Y, Baba M, Sekine R, Yamaguchi T, Hirohashi T, Tajima T, Tatara R, Watanabe H, Otani H, Takigawa C, Matsuda Y, Nagaoka H, Mori M, Kinoshita H. 1510 Clinical implications of C-reactive protein as a prognostic marker in advanced cancer patients in palliative settings. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30600-1] [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: 11/16/2022]
|
50
|
Baba M, Sato M, Kitoh K, Takashima Y. The distribution pattern of α2,3- and α2,6-linked sialic acids affects host cell preference in Toxoplasma gondii. Exp Parasitol 2015; 155:74-81. [PMID: 26003519 DOI: 10.1016/j.exppara.2015.05.005] [Citation(s) in RCA: 4] [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: 02/04/2015] [Revised: 04/27/2015] [Accepted: 05/11/2015] [Indexed: 01/11/2023]
Abstract
Tachyzoites of Toxoplasma gondii, an obligate intracellular parasite, actively invade almost all types of nucleated cells. However, T. gondii tachyzoites preferentially infect particular types of animal tissue cells. The mechanism underlying the host cell preference of T. gondii is not yet known. In this study, we found that enzymatic removal of α2,3- but not α2,6-linked sialic acids on the surface of Vero cells decreased T. gondii tachyzoite adhesion or invasion to the treated cells. Although Chinese hamster ovary (CHO) cells express only α2,3-linked sialic acid, a genetically modified CHO cell line constructed by transfection with the α2,6-sialiltransferase gene contains subpopulations with a variety of expression patterns of α2,3- and α2,6-linked sialic acids. When T. gondii tachyzoites were added to the modified CHO cells, the tachyzoites preferentially attached to cells belonging to a subpopulation of cells that highly expressed α2,3-linked sialic acids. Additionally, multiple regression analysis performed to analyse the relationship between the amount of α2,3-linked/α2,6-linked sialic acids and parasite-expressed fluorescence intensity suggested that more tachyzoites adhered to individual α2,3-linked sialic acid rich-cells than to α2,3-linked sialic acid-poor/null cells. The results of confocal laser microscopy confirmed this finding. These results indicate that the host cell preference of T. gondii was, at least partially, affected by the distribution pattern of α2,3-, but almost never α2,6-linked sialic acids on host cells.
Collapse
Affiliation(s)
- Minami Baba
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Masanao Sato
- National Institute for Basic Biology, Okazaki Institute for Integrative Bioscience, 5-1 Higashiyama, Okazaki 444-8787, Japan
| | - Katsuya Kitoh
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yasuhiro Takashima
- Department of Veterinary Parasitology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| |
Collapse
|