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Tezuka M, Oka T, Nakatsuka K, Saeki K, Ono R. Association of low back pain and sleep quality with presenteeism. Occup Med (Lond) 2022; 72:598-603. [PMID: 36516221 DOI: 10.1093/occmed/kqac126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Low back pain (LBP) and poor subjective sleep quality (SSQ) are major risk factors for presenteeism. However, no studies have investigated whether combined LBP and poor SSQ are associated with presenteeism. AIMS We aimed to examine whether a combination of LBP and poor SSQ is associated with presenteeism. METHODS This cross-sectional study included 936 workers (median age, 38 years; men, 89%), with evaluated presenteeism using the work limitations questionnaire. We divided them into 'no presenteeism' and 'presenteeism' categories. The presence of LBP was defined as a numerical rating scale (NRS) score of ≥1 in current pain intensity. SSQ was assessed using a single question regarding whether the participants typically got enough sleep. We categorized the participants into four groups: (i) LBP + poor SSQ, (ii) non-LBP + poor SSQ, (iii) LBP + good SSQ and (iv) non-LBP + good SSQ. Logistic regression analysis was used to investigate the association between presenteeism and the presence of LBP and poor SSQ, adjusting for age, sex, work type, education, marital status, smoking status, body mass index and weekly working hours. RESULTS The data from 533 participants were used for analysis (median age, 38 years; men, 90%, response rate, 66%). Combined LBP and poor SSQ were significantly associated with presenteeism (non-LBP + poor SSQ: adjusted odds ratio = 0.56, 95% CI 0.32-0.96; LBP + good SSQ: 0.33, 0.20-0.56; non-LBP + good SSQ: 0.29, 0.18-0.48). CONCLUSIONS Evaluating both LBP and SSQ may be beneficial in considering presenteeism.
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Affiliation(s)
- M Tezuka
- Department of Rehabilitation Science, Graduate School of Health Science, Kobe University, Kobe, Japan
| | - T Oka
- Department of Public Health, Graduate School of Health Science, Kobe University, Kobe, Japan
- Department of Rehabilitation Science, Osaka Health Science University, Osaka, Japan
| | - K Nakatsuka
- Department of Rehabilitation Science, Graduate School of Health Science, Kobe University, Kobe, Japan
- Department of Preventive Medicine and Epidemiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - K Saeki
- Department of Public Health, Graduate School of Health Science, Kobe University, Kobe, Japan
| | - R Ono
- Department of Public Health, Graduate School of Health Science, Kobe University, Kobe, Japan
- Department of Physical Activity Research, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan
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Urushidani M, Kawayoshi A, Kotaki T, Saeki K, Mori Y, Kameoka M. Inactivation of SARS-CoV-2 and influenza A virus by dry fogging hypochlorous acid solution and hydrogen peroxide solution. PLoS One 2022; 17:e0261802. [PMID: 35389997 PMCID: PMC8989197 DOI: 10.1371/journal.pone.0261802] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/23/2022] [Indexed: 11/26/2022] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), is transmitted mainly by droplet or aerosol infection; however, it may also be transmitted by contact infection. SARS-CoV-2 that adheres to environmental surfaces remains infectious for several days. We herein attempted to inactivate SARS-CoV-2 and influenza A virus adhering to an environmental surface by dry fogging hypochlorous acid solution and hydrogen peroxide solution. SARS-CoV-2 and influenza virus were air-dried on plastic plates and placed into a test chamber for inactivation by the dry fogging of these disinfectants. The results obtained showed that the dry fogging of hypochlorous acid solution and hydrogen peroxide solution inactivated SARS-CoV-2 and influenza A virus in CT value (the product of the disinfectant concentration and contact time)-dependent manners. SARS-CoV-2 was more resistant to the virucidal effects of aerosolized hypochlorous acid solution and hydrogen peroxide solution than influenza A virus; therefore, higher concentrations of disinfectants or longer contact times were required to inactivate SARS-CoV-2 than influenza A virus. The present results provide important information for the development of a strategy that inactivates SARS-CoV-2 and influenza A virus on environmental surfaces by spatial fogging.
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Affiliation(s)
| | - Akira Kawayoshi
- Disinfection Division, H. Ikeuchi & Co., Ltd., Nishiwaki, Hyogo, Japan
| | - Tomohiro Kotaki
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Keiichi Saeki
- Laboratory of Microbiology and Immunology, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Yasuko Mori
- Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Masanori Kameoka
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
- * E-mail:
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3
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Urushidani M, Kawayoshi A, Kotaki T, Saeki K, Mori Y, Kameoka M. Inactivation of SARS-CoV-2 and influenza A virus by dry fogging hypochlorous acid solution and hydrogen peroxide solution. PLoS One 2022; 17:e0261802. [PMID: 35389997 DOI: 10.1101/2021.12.13.472413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/23/2022] [Indexed: 05/27/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), is transmitted mainly by droplet or aerosol infection; however, it may also be transmitted by contact infection. SARS-CoV-2 that adheres to environmental surfaces remains infectious for several days. We herein attempted to inactivate SARS-CoV-2 and influenza A virus adhering to an environmental surface by dry fogging hypochlorous acid solution and hydrogen peroxide solution. SARS-CoV-2 and influenza virus were air-dried on plastic plates and placed into a test chamber for inactivation by the dry fogging of these disinfectants. The results obtained showed that the dry fogging of hypochlorous acid solution and hydrogen peroxide solution inactivated SARS-CoV-2 and influenza A virus in CT value (the product of the disinfectant concentration and contact time)-dependent manners. SARS-CoV-2 was more resistant to the virucidal effects of aerosolized hypochlorous acid solution and hydrogen peroxide solution than influenza A virus; therefore, higher concentrations of disinfectants or longer contact times were required to inactivate SARS-CoV-2 than influenza A virus. The present results provide important information for the development of a strategy that inactivates SARS-CoV-2 and influenza A virus on environmental surfaces by spatial fogging.
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Affiliation(s)
| | - Akira Kawayoshi
- Disinfection Division, H. Ikeuchi & Co., Ltd., Nishiwaki, Hyogo, Japan
| | - Tomohiro Kotaki
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Keiichi Saeki
- Laboratory of Microbiology and Immunology, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Yasuko Mori
- Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Masanori Kameoka
- Division of Global Infectious Diseases, Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Hyogo, Japan
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Kawasumi K, Morise M, Kirita K, Saeki K, Kameoka H, Daga H, Miyazaki M, Toyozawa R, Uoi M, Harada M, Tamaki S, Takeda M, Fujiwara K, Yamanaka T, Goto K. OA02.04 Phase II Trial of Antiemetic Oral Granisetron Plus Dexamethasone for Nausea and Vomiting Caused by Crizotinib in ALK or ROS1 Fusion-Positive NSCLC. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Shinada M, Saeki K, Yoshitake R, Eto S, Tsuboi M, Chambers JK, Uchida K, Kato D, Yoshimoto S, Kamoto S, Ikeda N, Kinoshita R, Fujita N, Nishimura R, Nakagawa T. Evaluation of epithelial and mesenchymal cell markers in canine urinary bladder transitional cell carcinoma. Vet J 2020; 266:105571. [PMID: 33323173 DOI: 10.1016/j.tvjl.2020.105571] [Citation(s) in RCA: 2] [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: 12/31/2019] [Revised: 10/21/2020] [Accepted: 11/03/2020] [Indexed: 02/07/2023]
Abstract
Canine transitional cell carcinoma (cTCC) is the most common malignant tumour in the urinary bladder: it is highly invasive and exhibits metastatic characteristics. Inflammation is also strongly related to cTCC. Epithelial tumours often exhibit a mesenchymal cell phenotype during tumour invasion and metastasis owing to epithelial-mesenchymal transition (EMT), which is often induced in chronic inflammation. The aim of this retrospective study was to investigate the expression of epithelial and mesenchymal cell markers in tumour cells and to evaluate its relationship with prognosis of cTCC. In this study, 29 dogs with cTCC who underwent surgical treatment were enrolled. Clinical parameters were reviewed using medical records. Tissue expression of epithelial and mesenchymal markers was evaluated by immunohistochemical analysis. The association between the expression of mesenchymal cell markers and clinical parameters, including prognosis, was statistically examined. In five normal bladder tissues used as controls, no expression of mesenchymal markers was observed, except for one tissue that expressed fibronectin. Conversely, epithelial tumour cells expressed vimentin and fibronectin in 23/29 and 19/28 cTCC tissues, respectively. Regarding clinical parameters, vimentin score in Miniature Dachshunds was significantly higher than those in other dog breeds (P < 0.001). Multivariate survival analyses revealed that age>12 years was related to shorter progression-free survival (P = 0.02). Higher vimentin score, lower fibronectin score, and advanced clinical T stage were significantly correlated with shorter median survival time (P < 0.05). The results of this study indicate that vimentin expression was associated with cTCC progression. Further studies are needed to examine the incidence and relevance of EMT in cTCC.
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Affiliation(s)
- M Shinada
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - K Saeki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| | - R Yoshitake
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - S Eto
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - M Tsuboi
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - J K Chambers
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - K Uchida
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - D Kato
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - S Yoshimoto
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - S Kamoto
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - N Ikeda
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - R Kinoshita
- Veterinary Medical Center, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - N Fujita
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - R Nishimura
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - T Nakagawa
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Obayashi K, Yamagami Y, Kurumatani N, Saeki K. Nighttime light exposure and the incidence of diabetes mellitus: a longitudinal Study Of the Heijo-Kyo Cohort. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.790] [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: 10/25/2022]
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7
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Maniscalco L, Guil-Luna S, Iussich S, Gattino F, Trupia C, Millan Y, de Las Mulas JM, Cespedez RS, Saeki K, Accornero P, De Maria R. Expression of the Short Form of RON/STK in Feline Mammary Carcinoma. Vet Pathol 2018; 56:220-229. [PMID: 30558510 DOI: 10.1177/0300985818806967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
RON is a tyrosine kinase receptor activated by the macrophage-stimulating protein (MSP) ligand that is overexpressed in human breast cancer. In humans, RON protein can be present in different isoforms, and the most studied isoform is represented by the short form of RON ( sf-RON), which is generated by an alternative promoter located in intron 10 of the RON complementary DNA (cDNA). It plays an important role in breast cancer progression. Considering the many similarities between feline mammary carcinoma (FMC) and human breast cancer, the aim of this study was to investigate the expression of both RON and MSP in FMCs and to identify the presence of the sf-RON transcript. Tissue samples of spontaneous mammary tumors were collected from 60 queens (10 benign lesions, 50 carcinomas). All of the samples were tested for RON and MSP expression by immunohistochemistry; moreover, RNA was extracted from paraffin-embedded tissue samples, and the cDNA was tested by reverse transcription-polymerase chain reaction (RT-PCR) to identify the presence of sf-RON. Immunohistochemistry detected the expression of RON and MSP in 34 of 50 (68%) and 29 of 50 (58%) FMCs, respectively. RT-PCR revealed the presence of the short-form in 18 of 47 (38%) FMCs. This form originates, as in humans, from an alternative promoter (P2), and it codes for the proper feline short form ( sf-RON). sf-RON expression was associated with poorly differentiated tumors and with a shorter disease-free ( P < .05; hazard ratio [HR], 2.2) period and a shorter survival ( P < .05; HR, 2.2). These results support FMC as a suitable model in comparative oncology and identify sf-RON expression as potential predictor of outcomes for this disease.
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Affiliation(s)
- Lorella Maniscalco
- 1 Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Silvia Guil-Luna
- 2 Faculty of Veterinary Medicine, Department of Comparative Pathology, University of Córdoba, Córdoba, Spain.,3 Maimónides Institute for Biomedical Research of Córdoba, IMIBIC, Córdoba, Spain
| | - Selina Iussich
- 1 Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Francesca Gattino
- 1 Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Calogero Trupia
- 1 Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Yolanda Millan
- 2 Faculty of Veterinary Medicine, Department of Comparative Pathology, University of Córdoba, Córdoba, Spain
| | - Juana Martín de Las Mulas
- 2 Faculty of Veterinary Medicine, Department of Comparative Pathology, University of Córdoba, Córdoba, Spain
| | - Raquel Sanchez Cespedez
- 2 Faculty of Veterinary Medicine, Department of Comparative Pathology, University of Córdoba, Córdoba, Spain
| | - K Saeki
- 4 Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Paolo Accornero
- 1 Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Raffaella De Maria
- 1 Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
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Saeki K, Onishi H, Oda Y, Nakamura M. FAM115c that upregulates proliferation and invasion under hypoxia could be a predictive biomarker for pancreatic cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy304.034] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Obayashi K, Saeki K. 0369 Pre-Awake Light Exposure And Sleep Disturbances: Findings From The HEIJO-KYO Cohort. Sleep 2018. [DOI: 10.1093/sleep/zsy061.368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, JAPAN
| | - K Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Nara, JAPAN
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Saeki K, Kataoka H, Sugie K, Obayashi K. 1024 Comparison Of Sleep Actigraphy Between Normal Participants And Patients Of Parkinson’S Disease. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K Saeki
- Nara Medical University School of Medicine, Nara, JAPAN
| | - H Kataoka
- Nara Medical University School of Medicine, Nara, JAPAN
| | - K Sugie
- Nara Medical University School of Medicine, Nara, JAPAN
| | - K Obayashi
- Nara Medical University School of Medicine, Nara, JAPAN
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Tai Y, Obayashi K, Yoshimoto K, Nishio K, Saeki K. 0184 Effect Of Bathing On Objective Sleep Quality Among Elderly: A Longitudinal Analysis Of Repeated Measurements In The Heijo-kyo Cohort. Sleep 2018. [DOI: 10.1093/sleep/zsy061.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Tai
- Department of Epidemiology, Nara Medical University School of Medicine, Kashihara city, JAPAN
| | - K Obayashi
- Department of Epidemiology, Nara Medical University School of Medicine, Kashihara city, JAPAN
| | - K Yoshimoto
- Department of General Medicine, Nara Medical University School of Medicine, Kashihara city, JAPAN
| | - K Nishio
- Department of General Medicine, Nara Medical University School of Medicine, Kashihara city, JAPAN
| | - K Saeki
- Department of Epidemiology, Nara Medical University School of Medicine, Kashihara city, JAPAN
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Nishida T, Lee SK, Inoue Y, Saeki K, Ishikawa K, Kaneko S. Adjunctive perampanel in partial-onset seizures: Asia-Pacific, randomized phase III study. Acta Neurol Scand 2018; 137:392-399. [PMID: 29250772 DOI: 10.1111/ane.12883] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2017] [Indexed: 02/01/2023]
Abstract
OBJECTIVES To evaluate the efficacy, safety, and tolerability of perampanel, a selective, non-competitive, α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor antagonist, as an adjunctive treatment for patients with refractory partial-onset seizures (POS) from Asia-Pacific. MATERIALS & METHODS This multicenter, randomized, double-blind, placebo-controlled trial (ClinicalTrials.gov identifier: NCT01618695) involved patients aged ≥12 years with refractory POS (receiving 1-3 antiepileptic drugs). Patients were randomized (1:1:1:1) to receive once-daily placebo or perampanel 4, 8, or 12 mg over a 6-week titration and 13-week maintenance double-blind period. Enzyme-inducing antiepileptic drugs were equally stratified between groups. The primary efficacy endpoint was percent change in POS frequency per 28 days (double-blind phase vs baseline). Other efficacy endpoints included ≥50% responder rate and seizure freedom. Treatment-emergent adverse events (TEAEs) were also monitored. RESULTS Of 710 randomized patients, seizure frequency data were available for 704 patients. Median percent changes in POS frequency per 28 days indicated dose-proportional reductions in seizure frequency: -10.8% with placebo and -17.3% (P = .2330), -29.0% (P = .0003), and -38.0% (P < .0001) with perampanel 4, 8, and 12 mg, respectively. In total, 108 (15.3%) patients discontinued treatment; 44 (6.2%) due to TEAEs. TEAEs occurring in ≥5% of patients, and reported at least twice as frequently with perampanel vs placebo, included dizziness and irritability. CONCLUSIONS Adjunctive perampanel (8 and 12 mg/d) significantly improved seizure control in patients with refractory POS. Safety and tolerability were acceptable at daily doses of perampanel 4-12 mg.
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Affiliation(s)
- T. Nishida
- National Epilepsy Center; Shizuoka Institute of Epilepsy and Neurological Disorders; Shizuoka Japan
| | - S. K. Lee
- Department of Neurology; Seoul National University Hospital; Seoul South Korea
| | - Y. Inoue
- National Epilepsy Center; Shizuoka Institute of Epilepsy and Neurological Disorders; Shizuoka Japan
| | | | | | - S. Kaneko
- North Tohoku Epilepsy Center; Minato Hospital; Aomori Japan
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Takenaka O, Ferry J, Saeki K, Laurenza A. Pharmacokinetic/pharmacodynamic analysis of adjunctive perampanel in subjects with partial-onset seizures. Acta Neurol Scand 2018; 137:400-408. [PMID: 29171002 DOI: 10.1111/ane.12874] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2017] [Indexed: 02/01/2023]
Abstract
OBJECTIVES Explore perampanel pharmacokinetics (PK) in all subjects (aged ≥12 years) vs adolescents (aged ≥12 to ≤17 years) with partial-onset seizures (POS) and identify factors explaining between-subject variability in efficacy using a population PK/pharmacodynamic (PD) analysis. MATERIALS & METHODS Population PK analysis was performed using nonlinear mixed-effect modeling with data from phase II/III randomized, double-blind, placebo-controlled studies of adjunctive perampanel in POS. Perampanel exposure was predicted for all subjects and adolescents. Population PK/PD analyses were performed using data from phase III studies to explore the relationship between perampanel exposure and 28-day average seizure frequency and responder probability. RESULTS Pooled perampanel PK data from 1318 subjects were described by a one-compartment disposition model. In the absence of antiepileptic drugs (AEDs) affecting perampanel PK, estimated perampanel apparent clearance (CL/F) was 0.668 L/h (all subjects) and 0.682 L/h (adolescent subjects). Co-administration of carbamazepine and oxcarbazepine/phenytoin reduced perampanel exposure. Gender, Asian race (excluding Japanese or Chinese), and increasing alanine aminotransferase lowered perampanel CL/F, but differences were small and not considered clinically relevant. Adolescent outcomes were similar to the total population. Based on PK/PD data from 1748 subjects, percent reduction in 28-day average seizure frequency from baseline and responder probability increased with increasing perampanel exposure; concomitant CYP3A-inducing AEDs lowered perampanel exposure but did not impact the slope for responder probability. CONCLUSIONS These results are consistent with previous analyses but expand on these through inclusion of a larger number of patients from different ethnic groups, and demonstrate that outcomes were similar between adults and adolescents.
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Affiliation(s)
| | - J. Ferry
- Eisai Inc.; Woodcliff Lake NJ USA
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Ong SM, Saeki K, Kok MK, Tanaka Y, Choisunirachon N, Yoshitake R, Nishimura R, Nakagawa T. Anti-tumour efficacy of etoposide alone and in combination with piroxicam against canine osteosarcoma in a xenograft model. Res Vet Sci 2017; 113:130-135. [PMID: 28957780 DOI: 10.1016/j.rvsc.2017.09.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 09/14/2017] [Accepted: 09/16/2017] [Indexed: 12/21/2022]
Abstract
Osteosarcoma (OSA) in dogs is locally invasive and highly malignant. Distant metastasis is the most common cause of death. To date, the survival rate in dogs with OSA remains poor. The cytotoxic effects of etoposide against canine OSA cell lines, either alone or in combination with piroxicam, have been previously demonstrated in vitro. The aim of this study was to evaluate the anti-tumour effect of etoposide alone and in combination with piroxicam on canine OSA using murine models. Etoposide single agent treatment significantly delayed tumour progression with a marked reduction in Ki-67 immunoreactivity in tumour tissue. Concomitant treatment with piroxicam did not enhance the anti-tumour efficacy of etoposide. Etoposide single agent treatment and combination treatment with piroxicam down-regulated survivin expression, but was not followed by increased apoptotic activity. These findings indicate that etoposide might be a promising novel therapeutic for canine OSA. Further investigations into its potential for clinical application in veterinary oncology are warranted.
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Affiliation(s)
- S M Ong
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - K Saeki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| | - M K Kok
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Y Tanaka
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - N Choisunirachon
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| | - R Yoshitake
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - R Nishimura
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| | - T Nakagawa
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
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Saeki K, Chien YC, Nonomura G, Chin AF, Habelitz S, Gower LB, Marshall SJ, Marshall GW. Recovery after PILP remineralization of dentin lesions created with two cariogenic acids. Arch Oral Biol 2017. [PMID: 28647649 DOI: 10.1016/j.archoralbio.2017.06.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVES Acetate and lactate are important cariogenic acids produced by oral bacteria. They produced different residual dentin structures in artificial lesions of similar depth. We evaluated if such lesions responded in the same way to a polymer-induced-liquid-precursor (PILP) remineralization. DESIGN Dentin blocks obtained from human third molars, divided into 6 groups (n=3). Blocks were demineralized with acetate (66h) or lactate (168h) buffer at pH 5.0 to create 140μm target lesion depths. A-DEM and L-DEM groups received no remineralization. Other groups were remineralized for 14days. 100μg/mL polyaspartate was added into the remineralizing buffer for A-PIL and L-PIL, whereas A-CAP and L-CAP were treated with the same solution but without polyaspartate. Cross-sectioned blocks were examined for shrinkage and AFM-topography. Line profiles of reduced elastic modulus (Er) were obtained by AFM-based nanoindentation across the lesion. Ultrastructures were examined with TEM. RESULTS A-PIL and L-PIL recovered in shrinkage to the original height of the dentin and it appeared normal with tubules, with increases in Er at both outer flat and inner sloped zones. At the sloped zone, acetate lesions lost more Er but recovery rate after PILP was not statistically different from lactate lesions. A-CAP and L-CAP showed surface precipitates, significantly less recovery in shrinkage or Er as compared to PILP groups. TEM-ultrastructure of PILP groups showed similar structural and mineral components in the sloped zone for lesions produced by either acid. CONCLUSIONS The PILP process provided significant recovery of both structure and mechanical properties for artificial lesions produced with acetate or lactate.
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Affiliation(s)
- K Saeki
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA.
| | - Y-C Chien
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA
| | - G Nonomura
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA
| | - A F Chin
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA
| | - S Habelitz
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA
| | - L B Gower
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611-6400, USA
| | - S J Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA
| | - G W Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA
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Obayashi K, Saeki K, Kurumatani N. 1026 GENDER DIFFERENCES IN THE ASSOCIATION BETWEEN SERUM ASYMMETRIC DIMETHYLARGININE, CHRONIC KIDNEY DISEASE, AND QUALITY OF OBJECTIVE/SUBJECTIVE SLEEP: THE HEIJO-KYO COHORT. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.1025] [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: 11/14/2022] Open
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Saeki K, Obayashi K, Kurumatani N. 0498 ASSOCIATION BETWEEN NOCTURNAL INTERMITTENT HYPOXIA AND ACTIGRAPHIC SLEEP QUALITY BETWEEN NOCTURNAL INTERMITTENT HYPOXIA AND ACTIGRAPHIC SLEEP QUALITY. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.497] [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: 11/12/2022] Open
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Dalai W, Matsuo E, Takeyama N, Kawano J, Saeki K. Increased expression of prion protein gene is accompanied by demethylation of CpG sites in a mouse embryonal carcinoma cell line, P19C6. J Vet Med Sci 2017; 79:644-648. [PMID: 28132962 PMCID: PMC5383191 DOI: 10.1292/jvms.16-0554] [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: 12/18/2022] Open
Abstract
Elucidation of the processes regulating the prion protein gene (Prnp) is an important key to understanding the development of prion disorders.
In this study, we explored the involvement of DNA methylation in Prnp transcriptional regulation during neuronal differentiation of embryonic
carcinoma P19C6 cells. When P19C6 cells were differentiated into neuronal cells, the expression of Prnp was markedly increased, while CpG
methylation was significantly demethylated at the nucleotide region between −599 and −238 from the transcription start site. In addition, when P19C6 cells were
applied in a DNA methyltransferase inhibitor, RG108, Prnp transcripts were also significantly increased in relation to the decreased
methylation statuses. These findings helped to elucidate the DNA methylation-mediated regulation of Prnp expression during neuronal
differentiation.
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Affiliation(s)
- Wuyun Dalai
- Laboratory of Microbiology and Immunology, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
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Dalai W, Matsuo E, Takeyama N, Kawano J, Saeki K. CpG site DNA methylation patterns reveal a novel regulatory element in the mouse prion protein gene. J Vet Med Sci 2017; 79:100-107. [PMID: 27666463 PMCID: PMC5289245 DOI: 10.1292/jvms.16-0390] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The cellular isoform of the prion protein (PrPC) plays critical roles in the development of prion disorders. Although PrP mRNA is ubiquitously
present in a tissue-specific manner, the DNA methylation of PrP gene (Prnp) is still unknown. In this study, we demonstrated that the CpG
island (CGI, positioned at −218 to +152 bp from the transcriptional start site) including the Prnp core promoter region was completely
unmethylated in all tested tissues. On the other hand, CpG methylation in the CGI shore region (positioned at −599 to −238 bp) occurred in various tissue- and
site-specific proportions. Interestingly, the correlation analysis between CpG methylation status and PrP mRNA levels showed that one CpG site methylation at
−576 was negatively correlated with the PrP mRNA level (Pearson’s r = −0.374, P=0.035). Taken together, our results suggest
that Prnp is a typical housekeeping gene and various methylation frequencies of the CGI shore region are likely to affect Prnp
expression in a tissue-specific manner.
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Affiliation(s)
- Wuyun Dalai
- Laboratory of Microbiology and Immunology, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
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Otaki N, Obayashi K, Saeki K, Kitagawa M, Tone N, Kurumatani N. Relationship between Breakfast Skipping and Obesity among Elderly: Cross-Sectional Analysis of the HEIJO-KYO Study. J Nutr Health Aging 2017; 21:501-504. [PMID: 28448079 DOI: 10.1007/s12603-016-0792-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Breakfast skipping is reported to be associated with obesity in children and younger populations; however, few studies report the association among elderly. The purpose of this study was to investigate the relationships between breakfast skipping and obesity prevalence among elderly. DESIGN Cross-sectional study. SETTING Community-dwelling elderly in Nara, Japan. PARTICIPANTS 1052 elderly participants (mean age: 71.6 years). MEASUREMENTS Obesity and breakfast skipping were defined as body mass index of ≥25 kg/m2 and skipping breakfast one or more times per week, respectively. RESULTS Two hundred and seventy-two participants (25.9%) were classified as obese and forty-one (3.9%) were as breakfast skippers. Obesity prevalence was significantly higher in breakfast skippers than in breakfast eaters (43.9% vs. 25.1%, P = 0.007). In multivariable logistic regression analysis adjusted for potential confounders (age, sex and alcohol consumption), breakfast skippers showed significantly higher odds ratio (OR) for obesity than breakfast eaters (OR, 2.23; 95% confidence interval, 1.17-4.27; P = 0.015), which continued to be significant after further adjustment for socioeconomic status. In addition, breakfast skippers showed significantly lower daily potassium (P <0.001) and dietary fibre intakes (P = 0.001) and lower subjective physical activity (P = 0.035) than breakfast eaters. CONCLUSIONS Breakfast skipping was significantly associated with obesity among elderly. Poor diet quality and physical inactivity may be potential intermediators underlying the association between breakfast skipping and obesity.
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Affiliation(s)
- N Otaki
- Keigo Saeki, MD, PhD, 840 Shijocho, Kashiharashi, Nara, 634-8521, Japan, Department of Community Health and Epidemiology, Nara Medical University School of Medicine, Nara, Japan, E-mail: , Phone: +81-744-22-3051, Fax: +81-744-25-7657
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Ong SM, Saeki K, Tanaka Y, Nishimura R, Nakagawa T. Effects of etoposide alone and in combination with piroxicam on canine osteosarcoma cell lines. Vet J 2016; 218:51-59. [PMID: 27938709 DOI: 10.1016/j.tvjl.2016.11.007] [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: 05/01/2016] [Revised: 09/21/2016] [Accepted: 11/15/2016] [Indexed: 12/21/2022]
Abstract
Osteosarcoma (OSA) is the most common primary bone tumour in dogs. The poor survival rate in dogs with OSA highlights the need for new therapeutic approaches. This study evaluated the cytotoxic effects of etoposide, alone and in combination with piroxicam, on canine OSA cell cultures. Etoposide alone significantly suppressed cell growth and viability, whereas etoposide in combination with piroxicam exhibited concentration dependent cytotoxicity. The anti-proliferative effect was a result of inactivity of the Cdc2-cyclin B1 complex, which correlated with an increase in the G2/M fraction. This subsequently activated the apoptosis cascade, as indicated by elevated apoptosis levels and up-regulation of poly (ADP-ribose) polymerase proteolytic cleavage. Down-regulation of survivin expression induced by the combination treatment may have contributed to the enhanced cytotoxicity. The results of this study suggest that further investigation of etoposide and piroxicam as a therapeutic combination for canine OSA is warranted.
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Affiliation(s)
- S M Ong
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - K Saeki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Y Tanaka
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - R Nishimura
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - T Nakagawa
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
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Tanaka H, Fujimoto Y, Koshimizu M, Yanagida T, Yahaba T, Saeki K, Asai K. Radiophotoluminescence properties of Ag-doped phosphate glasses. RADIAT MEAS 2016. [DOI: 10.1016/j.radmeas.2016.09.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Nurrohman H, Saeki K, Carneiro K, Chien Y, Djomehri S, Ho S, Qin C, Marshall S, Gower L, Marshall G, Habelitz S. Repair of dentin defects from DSPP knockout mice by PILP mineralization. J Mater Res 2016; 31:321-327. [PMID: 27239097 PMCID: PMC4884014 DOI: 10.1557/jmr.2015.406] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Dentinogenesis imperfecta type II (DGI-II) lacks intrafibrillar mineral with severe compromise of dentin mechanical properties. A Dspp knockout (Dspp-/-) mouse, with a phenotype similar to that of human DGI-II, was used to determine if poly-L-aspartic acid [poly(ASP)] in the "polymer-induced liquid-precursor" (PILP) system can restore its mechanical properties. Dentin from six-week old Dspp-/- and wild-type mice was treated with CaP solution containing poly(ASP) for up to 14 days. Elastic modulus and hardness before and after treatment were correlated with mineralization from Micro x-ray computed tomography (Micro-XCT). Transmission electron microscopy (TEM)/Selected area electron diffraction (SAED) were used to compare matrix mineralization and crystallography. Mechanical properties of the Dspp-/- dentin were significantly less than wild-type dentin and recovered significantly (P < 0.05) after PILP-treatment, reaching values comparable to wild-type dentin. Micro-XCT showed mineral recovery similar to wild-type dentin after PILP-treatment. TEM/SAED showed repair of patchy mineralization and complete mineralization of defective dentin. This approach may lead to new strategies for hard tissue repair.
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Affiliation(s)
- H. Nurrohman
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - K. Saeki
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - K. Carneiro
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - Y.C. Chien
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - S. Djomehri
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - S.P. Ho
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - C. Qin
- Department of Biomedical Sciences and Center for Craniofacial Research and Diagnosis, Texas A&M University Baylor College of Dentistry, Dallas, Texas 75246, USA
| | - S.J. Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - L.B. Gower
- Department of Materials Science & Engineering, University of Florida, Gainesville, Florida 32611, USA
| | - G.W. Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - S. Habelitz
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
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Takeishi K, Ikegami T, Yoshizumi T, Itoh S, Harimoto N, Harada N, Tsujita E, Kimura Y, Yamashita Y, Saeki K, Oki E, Shirabe K, Maehara Y. Thymoglobulin for steroid-resistant immune-mediated graft dysfunction during simeprevir-based antiviral treatment for post-transplantation hepatitis C: case report. Transplant Proc 2015; 47:794-5. [PMID: 25891734 DOI: 10.1016/j.transproceed.2014.11.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 11/09/2014] [Accepted: 11/18/2014] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Immune-mediated graft dysfunction (IGD), a recently established disease entity with unfavourable outcome, is an antigraft immune reaction during interferon-based antiviral treatment for hepatitis C virus (HCV) infection after liver transplantation (LT). We report a case having steroid-resistant acute cellular rejection (ACR) type IGD, which was successfully treated using thymoglobulin. CASE REPORT A 56-year-old woman with recurrent HCV after LT was commenced on antiviral treatment including simeprevir, pegylated-interferon (IFN) 2a, and ribavirin. A negative serum HCV-RNA was confirmed after 4 weeks. After 12 weeks of therapy, severe liver dysfunction developed, despite a constantly negative HCV-RNA. Liver biopsy revealed portal and periportal inflammatory infiltrates including numerous eosinophils, lymphocytes, and bile duct damages, indicating ACR. IFN therapy was ceased, and she was treated with steroid pulse treatment, followed by high-level immunosuppression maintenance. However, ACR was irremediable. Thereafter she was treated with thymoglobulin (75 mg/d for 5 days). Her serum alanine aminotransaminase and total bilirubin levels decreased immediately, and her liver biopsy specimen showed no activity. During these periods of the treatment, the HCV-RNA became positive and the liver enzyme elevated, but other liver function tests still remained within normal range. CONCLUSION Thymoglobulin could be the best choice in steroid-resistant IGD during antiviral treatment for post-transplantation recurrent hepatitis C.
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Affiliation(s)
- K Takeishi
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan.
| | - T Ikegami
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - T Yoshizumi
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - S Itoh
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - N Harimoto
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - N Harada
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - E Tsujita
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Y Kimura
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Y Yamashita
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - K Saeki
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - E Oki
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - K Shirabe
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Y Maehara
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
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Chien YC, Burwell AK, Saeki K, Fernandez-Martinez A, Pugach MK, Nonomura G, Habelitz S, Ho SP, Rapozo-Hilo M, Featherstone JD, Marshall SJ, Marshall GW. Distinct decalcification process of dentin by different cariogenic organic acids: Kinetics, ultrastructure and mechanical properties. Arch Oral Biol 2015; 63:93-105. [PMID: 26745819 DOI: 10.1016/j.archoralbio.2015.10.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [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: 02/22/2015] [Revised: 07/15/2015] [Accepted: 10/01/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVES We studied artificial dentin lesions in human teeth generated by lactate and acetate buffers (pH 5.0), the two most abundant acids in caries. The objective of this study was to determine differences in mechanical properties, mineral density profiles and ultrastructural variations of two different artificial lesions with the same approximate depth. METHODS 0.05M (pH 5.0) acetate or lactate buffer was used to create 1) 180μm-deep lesions in non-carious human dentin blocks (acetate 130h; lactate 14days); (2) demineralized, ∼180μm-thick non-carious dentin discs (3 weeks). We performed nanoindentation to determine mechanical properties across the hydrated lesions, and micro X-ray computed tomography (MicroXCT) to determine mineral profiles. Ultrastructure in lesions was analyzed by TEM/selected area electron diffraction (SAED). Demineralized dentin discs were analyzed by small angle X-ray scattering (SAXS). RESULTS Diffusion-dominated demineralization was shown based on the linearity between lesion depths versus the square root of exposure time in either solution, with faster kinetics in acetate buffer. Nanoindentation revealed lactate induced a significantly sharper transition in reduced elastic modulus across the lesions. MicroXCT showed lactate demineralized lesions had swelling and more disorganized matrix structure, whereas acetate lesions had abrupt X-ray absorption near the margin. At the ultrastructural level, TEM showed lactate was more effective in removing minerals from the collagenous matrix, which was confirmed by SAXS analysis. CONCLUSIONS These findings indicated the different acids yielded lesions with different characteristics that could influence lesion formation resulting in their distinct predominance in different caries activities, and these differences may impact strategies for dentin caries remineralization.
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Affiliation(s)
- Y-C Chien
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US; Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, US
| | - A K Burwell
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - K Saeki
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - A Fernandez-Martinez
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, US; ISTerre, CNRS & University of Grenoble, B.P. 53X, Grenoble, Cedex 9, 38041, France
| | - M K Pugach
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - G Nonomura
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - S Habelitz
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - S P Ho
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - M Rapozo-Hilo
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - J D Featherstone
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - S J Marshall
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - G W Marshall
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US.
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Matsuo E, Saeki K, Roy P, Kawano J. Development of reverse genetics for Ibaraki virus to produce viable VP6-tagged IBAV. FEBS Open Bio 2015; 5:445-53. [PMID: 26101741 PMCID: PMC4472822 DOI: 10.1016/j.fob.2015.05.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 04/15/2015] [Revised: 05/13/2015] [Accepted: 05/22/2015] [Indexed: 01/18/2023] Open
Abstract
A reverse genetics system for Ibaraki virus (IBAV) was developed. The RG system was used to produce viable VP6-tagged IBAV. A region of VP6 (aa 34–82) is not required for IBAV replication in tissue culture. The insertion of tags into the nonessential VP6 region did not disrupt replication. IBAV VP6 quickly assembled into puncta in the cytosol of infected cells.
Ibaraki virus (IBAV) is a member of the epizootic hemorrhagic disease virus (EHDV) serogroup, which belongs to the Orbivirus genus of the Reoviridae family. Although EHDV, including IBAV, represents an ongoing threat to livestock in the world, molecular mechanisms of EHDV replication and pathogenesis have been unclear. The reverse genetics (RG) system is one of the strong tools to understand molecular mechanisms of virus replication. Here, we developed a RG system for IBAV to identify the nonessential region of a minor structural protein, VP6, by generating VP6-truncated IBAV. Moreover, several tags were inserted into the truncated region to produce VP6-tagged IBAV. We demonstrated that all VP6-tagged IBAV could replicate in BHK cells in the absence of any helper VP6 protein. Further, tagged-VP6 proteins were first assembled into puncta in cells infected with VP6-tagged IBAV. Our data suggests that, in order to initiate primary replication, IBAV VP6 is likely to accumulate in some parts of infected cells to assemble efficiently into the primary replication complex (subcore).
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Affiliation(s)
- Eiko Matsuo
- Microbiology & Immunology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1, Rokkodai, Nada-ku, Kobe-city 657-8501, Japan
| | - Keiichi Saeki
- Microbiology & Immunology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1, Rokkodai, Nada-ku, Kobe-city 657-8501, Japan
| | - Polly Roy
- Department of Pathogen Molecular Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
| | - Junichi Kawano
- Microbiology & Immunology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1, Rokkodai, Nada-ku, Kobe-city 657-8501, Japan
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Saeki K, Watanabe M, Tsuboi M, Sugano S, Yoshitake R, Tanaka Y, Ong SM, Saito T, Matsumoto K, Fujita N, Nishimura R, Nakagawa T. Anti-tumour effect of metformin in canine mammary gland tumour cells. Vet J 2015; 205:297-304. [PMID: 25981932 DOI: 10.1016/j.tvjl.2015.04.026] [Citation(s) in RCA: 9] [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: 10/27/2014] [Revised: 04/07/2015] [Accepted: 04/19/2015] [Indexed: 01/06/2023]
Abstract
Metformin is an oral hypoglycaemic drug used in type 2 diabetes. Its pharmacological activity reportedly involves mitochondrial respiratory complex I, and mitochondrial respiratory complex inhibitors have a strong inhibitory effect on the growth of metastatic canine mammary gland tumour (CMGT) cell lines. It is hypothesised that metformin has selective anti-tumour effects on metastatic CMGT cells. The aim of this study was to investigate the in vitro effect of metformin on cell growth, production of ATP and reactive oxygen species (ROS), and the AMP-activated protein kinase (AMPK) mammalian target of rapamycin (mTOR) pathway in two CMGT clonal cell lines with different metastatic potential. In addition, transcriptome analysis was used to determine cellular processes disrupted by metformin and in vivo anti-tumour effects were examined in a mouse xenograft model. Metformin inhibited CMGT cell growth in vitro, with the metastatic clone (CHMp-5b) displaying greater sensitivity. ATP depletion and ROS elevation were observed to a similar extent in the metastatic and non-metastatic (CHMp-13a) cell lines after metformin exposure. However, subsequent AMPK activation and mTOR pathway inhibition were prominent only in metformin-insensitive non-metastatic cells. Microarray analysis revealed inhibition of cell cycle progression by metformin treatment in CHMp-5b cells, which was further confirmed by Western blotting and cell cycle analysis. Additionally, metformin significantly suppressed tumour growth in xenografted metastatic CMGT cells. In conclusion, metformin exhibited an anti-tumour effect in metastatic CMGT cells through AMPK-independent cell cycle arrest. Its mechanism of action differed in the non-metastatic clone, where AMPK activation and mTOR inhibition were observed.
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Affiliation(s)
- K Saeki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - M Watanabe
- Department of Medical Genome Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - M Tsuboi
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - S Sugano
- Department of Medical Genome Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - R Yoshitake
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Y Tanaka
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - S M Ong
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - T Saito
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - K Matsumoto
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - N Fujita
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - R Nishimura
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - T Nakagawa
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
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Saeki K, Fujiki Y. 226 IN VITRO PRODUCTION OF BOVINE EMBRYOS USING CHEMICAL PACKETS THAT REGULATE CO2 AND O2. Reprod Fertil Dev 2015. [DOI: 10.1071/rdv27n1ab226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Bovine embryos are now routinely produced with oocytes collected from slaughterhouse ovaries or by transvaginal ovum pickup. The oocytes are matured, fertilized, and cultured in a water-jacketed CO2/O2 incubator. Gas phase in incubators is usually maintained at 5% CO2 in air for in vitro maturation (IVM) and IVF of oocytes and at 5% CO2, 5% O2, and 90% N2 for in vitro culture (IVC) of embryos. Here we investigated whether two chemical packets that regulate CO2 and O2 for culturing bacteria (Mitsubishi Gas Chemical, Tokyo, Japan) could be used to control the gas phase in vitro production (IVP) of cattle embryos. One packet (Anaero Pack-CO2) was maintained at a CO2 level of ~5% in a 2.5-L container and the other (Anaero Pack-MicroAnaero) was maintained at a CO2 level of 5–8% and an O2 level of 6 to 12%. Bovine cumulus-oocyte complexes (COC, n = 970) were collected from slaughterhouse ovaries, matured in HEPES-buffered TCM-199 (catalog number 12340–030, Invitrogen) supplemented with 10% FCS, 0.02 Armour unit mL–1 FSH and 1 µg mL–1 E2 for 22 h, and fertilized in medium IVF100 [Research Institute for the Functional Peptides Co. Ltd. (IFP), Yamagata, Japan] with frozen-thawed sperm (4 × 106 cells mL–1) for 6 h. Sperm and cumulus cells were removed from the oocytes. The denuded oocytes were cultured in IVD101 (IFP, 20 to 30 embryos/50 μL) for 8 days (Day 0 = IVF). Culture was carried out at 39°C with maximum humidity. Five different combinations of gas conditions were used for incubation (Table 1). Experiments were repeated 3 times. Cleavage and blastocyst rates were assessed on Day 8. Data were analysed by ANOVA followed by Fisher's PLSD test. In the five conditions, rates of matured oocytes (oocytes at MII, n = 210) were 70 to 73% and rates of normal fertilized oocytes (oocytes with 2 pronuclei, n = 310) were 67 to 75%. Cleavage rates of embryos after 8 days of culture (n = 450) were 68 to 75%, and rates of blastocysts from cleaved embryos were 25 to 40%. None of the above measures were significantly different among the 5 conditions (P > 0.05). These results indicate that gas phase control is not needed for IVM and IVF of bovine oocytes for their subsequent development. Anaero Pack-MicroAnaero (5–8% CO2, 6–12% O2) can be used for IVC of bovine embryos. The CO2-generating and deoxidizing packets can be successfully used to control the gas phase during bovine embryo production.
Table 1.Five different combinations of gas conditions used for incubation
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Chien YC, Saeki K, Fernandez-Martinez A, Lau J, Tao J, Chen CL, Zuckermann R, De Yoreo J, Marshall S, Marshall G. Peptoids promote recovery of ultrastructure in caries remineralization. Dent Mater 2014. [DOI: 10.1016/j.dental.2014.08.344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Saeki K, Iwamoto D, Taniguchi S, Kishi M, Kato N. 166 MATURATION OF BOVINE OOCYTES IN POLY(DIMETHYLSILOXANE) MICROWELLS AND THEIR SUBSEQUENT DEVELOPMENT FOLLOWING IN VITRO FERTILIZATION. Reprod Fertil Dev 2014. [DOI: 10.1071/rdv26n1ab166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
During bovine oocyte maturation, a lower density of cumulus cells surrounding oocytes reduces the developmental competence of the oocytes after IVF. Adding more cumulus cells (Hashimoto et al. 1998) rescues the developmental competence of the corona-enclosed oocytes. In this study, we examined the effects of poly(dimethylsiloxane) (PDMS) microwells (MW) for bovine oocyte maturation on the developmental competence of the oocytes following IVF. In experiment 1, MW were produced by making holes on 0.5-mm-thick PDMS plates using a 0.5-mm-diameter biopsy punch. The punched plates were placed on the bottoms of culture dishes. Bovine cumulus oocytes complexes (COC) were collected from slaughterhouse ovaries. Cumulus layers were removed from COC to prepare corona-enclosed oocytes (CEO) and denuded oocytes (DO). Then, COC, CEO, or DO were individually matured in single MW for 24 h at 39°C under 5% CO2 in air with high humidity. Ten oocytes of each group were matured in 50-μL droplets of maturation medium (group culture, GC) as controls. Maturation medium was TCM-199 supplemented with 10% FCS, 0.02 AU mL–1 FSH, and 1 μg mL–1 E2. The matured oocytes were fertilized with frozen–thawed spermatozoa. The embryos were cultured in CR1aa medium for 168 h under 5% CO2, 5% O2 and 90% N2 with high humidity. In experiment 2, effects of depth of MW for maturation on subsequent development following IVF were examined. Microwells were produced by making 0.5-mm-diameter holes on 0.5- or 1.5-mm-thick PDMS plates. Then, COC or CEO were individually matured in the MW for 24 h. Matured oocytes were fertilized in vitro and cultured for 168 h. Oocytes that were matured by GC were used as controls. In experiment 1(N = 4), rates of maturation (76–100%, n = 26 to 38), normal fertilization (53–70%, n = 44 to 49), and cleavage (61–77%, n = 114 to 117) were not different among all groups (P > 0.05; Fisher's PLSD test following ANOVA). Blastocyst rates were the same (P > 0.05) for COC matured in MW (50%) and by GC (43%). The rate for CEO that matured in MW (46%) tended to be higher (P = 0.061) than the rate for CEO that matured by GC (31%), and was comparable to the rate for COC matured by GC (43%). The blastocyst rates for DO that matured in MW and by GC were low (6%). In experiment 2 (N = 3), rates of maturation (86–100%, n = 13 to 28), normal fertilization (60–78%, n = 22 to 40), and cleavage (67–73%, n = 85 to 90) were not different among all groups (P > 0.05). However, the blastocyst rate for COC that matured in 1.5-mm-deep MW (53%) was significantly higher than the rates for COC that matured in 0.5-mm-deep MW (38%) and by GC (31%; P < 0.05). The results indicate that the developmental competence of oocytes that matured individually in PDMS MW was greater than that of oocytes that matured by GC. The deeper (1.5 mm) MW were found to be more effective for oocyte maturation than shallow (0.5 mm) MW and GC. The MW might increase density of cumulus cells surrounding oocytes, and the high cell-density enhanced the developmental competence of the oocytes.
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Lee DC, Sakudo A, Kim CK, Nishimura T, Saeki K, Matsumoto Y, Yokoyama T, Chen SG, Itohara S, Onodera T. Fusion of Doppel to Octapeptide Repeat and N-Terminal Half of Hydrophobic Region of Prion Protein Confers Resistance to Serum Deprivation. Microbiol Immunol 2013; 50:203-9. [PMID: 16547418 DOI: 10.1111/j.1348-0421.2006.tb03787.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Our previous studies have shown an essential role played by the octapeptide repeat region (OR) and the N-terminal half of hydrophobic region (HR) in the anti-apoptotic activity of prion protein (PrP). As PrP-like protein Doppel (Dpl), which structurally resembles an N-terminally truncated PrP, did not show any anti-apoptotic activity, we examined apoptosis of HpL3-4 cells expressing Dpl fused to various lengths of the N-terminal region of PrP to investigate whether the PrP/Dpl fusion proteins retain anti-apoptotic function. HpL3-4 cells expressing Dpl fused to PrP(1-124) with the OR and N-terminal half of HR of PrP showed anti-apoptotic function, whereas Dpl fused to PrP(1-95) with OR did not rescue cells from apoptotic cell death induced by serum deprivation. These results indicate that the OR and N-terminal half of HR of PrP retains anti-apoptotic activity similar to full-length PrP.
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Affiliation(s)
- Deug-chan Lee
- Department of Molecular Immunology, School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan
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Saitoh N, Awaya A, Sakudo A, SungWook S, Saeki K, Matsumoto Y, Onodera T. Serum Thymic Factor Prevents LPS-Induced Pancreatic Cell Damage in Mice via Up-Regulation of Bcl-2 Expression in Pancreas. Microbiol Immunol 2013; 48:629-38. [PMID: 15383698 DOI: 10.1111/j.1348-0421.2004.tb03471.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The protective effect of synthetic serum thymic factor (FTS) nonapeptide on lipopolysaccharide (LPS)-induced pancreatic cell damage in 10-week-old BALB/c male mice was investigated. Mice were divided into three groups. Group I was treated with LPS (10 micro g/head; i.p.) (LPS-treated mice). Group II was administered with FTS (50 micro g/head; i.p.) 24 hr before treatment with LPS and complemented immediately before LPS injection with FTS (50 micro g/head; i.p.) (FTS-administered mice). Group III was only treated with the same volume of saline (control mice). Treatment of LPS in vivo resulted in the destruction of pancreatic acinar cells. In those cells, many apoptotic cells were detected by immunohistochemistry using an anti-single stranded DNA antibody. Immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR) revealed that LPS treatment also caused low or a lack of insulin expression in pancreatic islets. In contrast, morphological change was not seen and apoptotic cell death was suppressed in pancreatic cells of FTS-administered mice. Moreover, insulin expression was normal in those mice. FTS administration enhanced expression of Bcl-2 mRNA levels in pancreatic tissues and IL-6 mRNA levels in splenocytes significantly compared with those of LPS treatment at 3 hr after LPS injection. These findings suggest that FTS prevents LPS-induced cell damage via enhancing Bcl-2 expression in the pancreas and systemic IL-6 production.
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Affiliation(s)
- Noriko Saitoh
- Department of Molecular Immunology, School of Agricultural and Life Sciences, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
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Abstract
With the respect to BSE and vCJD, compliance with the following three rules should strictly be observed: (i) Identification and destruction of all clinically affected cattle; (ii) destruction of all mammalian proteins used in feeding ruminant livestock; and (iii) destruction of all high-risk tissues for use in human consumption. Scrapie in sheep has been documented in the 18th century in the United Kingdom. Through studies of brain-to-brain transmission in the same species in 1935, Cuille et al. successfully isolated the culprit protein from the sheep brain. To transmit said protein from an animal to another, intracerebral inoculation was much more efficient than intraperitoneal or oral route in certain species; i.e. the hamster and mouse. Since discovery of the more efficacious infection route, studies and development of prion research have undergone 4 developmental phases. Phase I depicted discoveries of the pathological features of Creutzfeldt-Jakob disease (CJD) and scrapie with typical lesions of spongiform encephalopathy, while Phase II revealed individual-to-individual (or cross-species) transmissions of CJD, kuru and scrapie in animals. Phases I and II suggested the possible participation of a slow virus in the infection process. In Phase III, Prusiner et al. proposed the 'prion' theory in 1982, followed by the milestone development of the transgenic or gene-targeted mouse in prion research in Phase IV. By strain-typing of prions, CJD has been classified as type 2 or 4 by Parchi et al. and Wadsworth as type-2 or -4 and type-1 or -2, respectively. Wadsworth type 1 is detected in the cerebellum, while Wadsworth type 2 was detected in the prefrontal cortex of 10% of sporadic CJD patients. In 1999, Puoti et al. have reported the co-existence of two types of PrP(res) in a same patient. These reports indicated that PrP(res)-typing is a quantitative rather than a qualitative process, and the relationship between the molecular type and the prion strain is rather complex. In fact, previous findings of Truchot have correlated type-1 distribution with synaptic deposits, and type-2 with arrangement of diffuse deposits in neurons. Although the normal function of PrP(C) has not been fully understood, recent studies have shown that PrP(C) plays a role in copper metabolism, signal transduction, neuroprotection and cell maturation. Further search of PrP(C)-interacting molecules and detailed studies using Prnp(-/-) mice and various type of Prnp(-/-) cell lines under various conditions are the prerequisites in elucidating PrP functions. In the pathogenesis of prion diseases, present results support the hypothesis that 'loss-of-function' of PrP(C) decreases resistance to oxidative stress, and 'gain-of-function' of PrP(Sc) increases oxidative stress. The mechanisms of (i) the 'loss-of-function' of PrP(C) in enhanced susceptibility to oxidative stress and (ii) the 'gain-of-function' of PrP(Sc) in generation of oxidative stress remain to be elucidated, although their mechanisms of action, at least in part, involve the decrease and increase in SOD activity, respectively.
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Affiliation(s)
- Takashi Onodera
- Department of Molecular Immunology, School of Agricultural and Life Sciences, University of Tokyo
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Nishimura T, Sakudo A, Hashiyama Y, Yachi A, Saeki K, Matsumoto Y, Ogawa M, Sakaguchi S, Itohara S, Onodera T. Serum Withdrawal-Induced Apoptosis in ZrchI Prion Protein (PrP) Gene-Deficient Neuronal Cell Line Is Suppressed by PrP, Independent of Doppel. Microbiol Immunol 2013; 51:457-66. [PMID: 17446686 DOI: 10.1111/j.1348-0421.2007.tb03920.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Previous studies have shown that cellular prion protein (PrP(C)) plays anti-apoptotic and antioxidative role against cell death induced by serum-deprivation (SDP) in an immortalized prion protein gene-deficient neuronal cell line derived from Rikn prion protein (PrP) gene-deficient (Prnp(-/-)) mice, which ectopically produce excess Doppel (Dpl) (PrP-like glycoprotein). To investigate whether PrP(C) inhibits apoptotic neuronal cell death without Dpl, an immortalized cell line was established from the brain of ZrchI Prnp(-/-) mice, which do not show ectopic expression of Dpl. The results using a ZrchI neuronal Prnp(-/-) cell line (NpL2) showed that PrP(C) potently inhibited SDP-induced apoptotic cell death. Furthermore, PrP(C) expression enhanced the superoxide dismutase (SOD) activity in NpL2 cells. These results indicate that Dpl production did not affect anti-apoptotic and anti-oxidative functions of PrP, suggesting that PrP(C) may be directly correlated with protection against oxidative stress.
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Affiliation(s)
- Takuya Nishimura
- Department of Molecular Immunology, School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
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Yama S, Nishioka W, Hirokami Y, Setoguchi R, Takeyama N, Saeki K, Matsumoto Y, Hayashi T, Doi K, Onodera T. Effects of Tacrolimus (FK506) on Encephalomyocarditic Virus-Induced Diabetes in Mice. Microbiol Immunol 2013; 48:7-13. [PMID: 14734853 DOI: 10.1111/j.1348-0421.2004.tb03482.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The effects of tacrolimus on insulin-dependent diabetes mellitus (IDDM) induced by the D-variant of encephalomyocarditis virus (D-EMCV) have been investigated. Male BALB/c mice were treated with tacrolimus before viral inoculation, and then were inoculated with 10 plaque forming units (PFU) of DEMCV. The mice continued to be treated with tacrolimus until the animals were sacrificed. D-EMCV-infected mice, which were treated with saline as controls, showed abnormal glucose tolerance test (GTT) values, whereas all infected mice with tacrolimus pretreatment were normal on 7 days-post inoculation (DPI). Histological observations revealed that non-treated tacrolimus D-EMCV-infected mice and which developed diabetes showed severe insulitis in their islets of Langerhans. On the other hand, D-EMCV-infected mice treated with tacrolimus were normal. In D-EMCV-infected mice, viruses in the pancreata were detected at the same level regardless of treatment with tacrolimus or saline. Expressions of TNF-alpha and IFN-gamma mRNA in spleens of tacrolimus-treated D-EMCV-infected mice were lower than that of non-treated tacrolimus DEMCV-infected mice on 7 DPI. The results suggest that tacrolimus suppresses expressions of TNF-alpha and IFN-gamma mRNAs to prevent the onset of D-EMCV-induced IDDM.
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Affiliation(s)
- Sachiko Yama
- Faculty of Agriculture, The University of Tokyo, Japan
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Choisunirachon N, Jaroensong T, Yoshida K, Saeki K, Mochizuki M, Nishimura R, Sasaki N, Nakagawa T. Effects of low-dose cyclophosphamide with piroxicam on tumour neovascularization in a canine oral malignant melanoma-xenografted mouse model. Vet Comp Oncol 2013; 13:424-32. [DOI: 10.1111/vco.12059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- N. Choisunirachon
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
- Department of Veterinary Surgery; Faculty of Veterinary Science, Chulalongkorn University; Bangkok Thailand
| | - T. Jaroensong
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
- Department of Companion Animal Clinical Sciences; Faculty of Veterinary Medicine, Kasetsart University; Bangkok Thailand
| | - K. Yoshida
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - K. Saeki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - M. Mochizuki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - R. Nishimura
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - N. Sasaki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - T. Nakagawa
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
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Oda H, Mori A, Lee P, Saeki K, Ishioka K, Arai T, Sako T. Characterization of the use of liraglutide for glycemic control in healthy and Type 1 diabetes mellitus suffering dogs. Res Vet Sci 2013; 95:381-8. [PMID: 23632200 DOI: 10.1016/j.rvsc.2013.04.003] [Citation(s) in RCA: 6] [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: 07/18/2012] [Revised: 02/20/2013] [Accepted: 04/02/2013] [Indexed: 12/25/2022]
Abstract
Glucagon-like peptide 1 (GLP-1) is a glucose-lowering, intestinal-derived factor with multiple physiological effects, making it attractive for diabetes therapy. However, the therapeutic potential of endogenous GLP-1 is limited, because of rapid inactivation by dipeptidyl peptidase-4. Recently, enhanced incretin preparations, such as liraglutide, have emerged, which are more resistant to degradation and longer lasting. Liraglutide is a long-acting acylated human GLP-1 receptor agonist, with a 97% amino acid sequence identity to endogenous human GLP-1, and 100% amino acid sequence homology with canine GLP-1. Since liraglutide has yet to be examined for use in dogs, and the incretin effect has been reported to exist in dogs, we sought to initially characterize liraglutide's ability for glycemic control in healthy dogs, under an oral glucose tolerance test (OGTT) environment initially. This was followed up a more realistic scenario involving food with insulin injection +/- liraglutide injection resulting in a glucose curve based study involving dogs suffering from Type 1 diabetes mellitus (T1DM). Overall, liraglutide had a stabilizing effect on glucose levels, maintaining circulating levels between 77.0 and 137.0mg/ml throughout the OGTT test period, resulting in a significant reduction of 13.8% in glucose AUC0-120 min (total area under the curve for 0-120 min) as compared to baseline control in healthy dogs (n=5). Interestingly, the liraglutide associated reduction in circulating glucose was not accompanied by any significant increase in insulin. Moreover, T1DM dogs (n=4) responded favorably to liraglutide treatment, which lead to a significant reduction of 46.0% in glucose AUC0-12h (total area under the curve for 0-12h), and a significant reduction of 66.5% in serum glucose as compared to baseline controls (insulin treatment only). Therefore, liraglutide's prandial glucagon suppressive ability appears to play a key role in its glucose-lowering capability, and offers great potential for use with dogs suffering from T1DM.
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Affiliation(s)
- H Oda
- Department of Veterinary Nursing & Technology, School of Veterinary Science Nippon Veterinary and Life Science University, 1-7-1 Kyonancho, Musashino, Tokyo 180-8602, Japan
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Yoshida K, Saito T, Kamida A, Matsumoto K, Saeki K, Mochizuki M, Sasaki N, Nakagawa T. Transforming growth factor-β transiently induces vimentin expression and invasive capacity in a canine mammary gland tumor cell line. Res Vet Sci 2012. [PMID: 23182613 DOI: 10.1016/j.rvsc.2012.10.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The epithelial-mesenchymal transition (EMT) is a crucial event that occurs during cancer metastasis and can be induced by transforming growth factor-β (TGF-β) in various tumor cells in vitro. However, little is known about the effects of TGF-β in canine mammary gland tumors (CMGTs). Here, we investigated the role of TGF-β in CMGT. We observed that treatment of the CMGT cell line CHMp13a with TGF-β1 leads to transient induction of the mesenchymal marker vimentin. Real-time measurements of cellular electrical impedance also showed that CMGT invasiveness is transiently increased by TGF-β1 treatment, but is reversed after prolonged stimulation. This phenomenon is similar to the mesenchymal-epithelial transition (MET, the reverse phenomenon of EMT), and a process that is implicated in the establishment of secondary metastatic lesions.
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Affiliation(s)
- K Yoshida
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
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Kato H, Kitamura R, Yamaguchi H, Numata Y, Kijima T, Anzai M, Mitani T, Matsumoto K, Saeki K, Hosoi Y, Iritani A. 180 EFFECT OF Dnmt1p mRNA KNOCK DOWN ON Dnmt1 PROTEIN TRANSLATION IN MOUSE TESTIS. Reprod Fertil Dev 2012. [DOI: 10.1071/rdv24n1ab180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We have reported that there was a significant reduction (P < 0.05) in the relative amount of Dnmt1p mRNA in spermatozoa from aged male mice (Kato et al. 2007 Reprod. Fertil. Dev. 19, 277 abst.). The reduction of mRNA levels of Dnmt1p in spermatozoa would lead to altered epigenetic modification of the genome. Dnmt1p is one of 5′ exon alternative isoforms of Dnmt1 and its mRNA is specifically expressed in the pachytene spermatocyte. However, the function of Dnmt1p still has not been elucidated. In this study, we tried to elucidate the function of Dnmt1p in the male mouse reproductive system. This was accomplished by suppressing the expression level of Dnmt1p in the whole testis by short hairpin RNA (shRNA) expression, which was specifically designed from mouse Dnmt1p mRNA. Dnmt1p cDNA was cloned from total RNA extracted from a piece of testis from a C57BL/6J male mouse. Four shRNA expression vectors were constructed and the knock-down efficiency of each shRNA expression vector was evaluated by flow cytometry. From these results, the 589 shRNA expression vector was picked out for further experimentation. The 589 shRNA expression vector was linearized and injected into the pronuclei of C57BL/6J mouse embryos. After injection, the embryos were cultured for 24 h and cleavage was evaluated. Cleaved embryos were transferred into oviducts of recipient ICR mice. After 18 to 19 days, fetuses were delivered by C-section. Two weeks after the birth, the existence of the 589 shRNA expression gene construct in its genome was evaluated by PCR. From founders with 589 shRNA expression gene construct in its genome, finally 1 TG strain was established and used for further experimentation. Two F2 -generation male mice with the 589 shRNA expression gene construct, 2 F2-generation male mice without the 589 shRNA expression gene construct and 1 C57BL/6J wild-type male mouse were used for evaluating the expression level of Dnmt1p mRNA in the whole testis by quantitative PCR. Then, thin sections of testis derived from the F2-generation mouse, which showed a suppressed expression level of Dnmt1p, was evaluated by immunostaining for Dnmt1 protein. The survival rate of mouse embryos after gene injection was 76.8% (202/263) and the cleavage rate of gene-injected embryos was 69.8% (141/202). The developmental rate of transferred embryos to the birth was 19% (27/139). The rate of newborn mice with the 589 shRNA expression gene construct was 37% (10/27). The fertility of established TG strain mouse was normal and there was no abnormality in the thin section figure of testis stained with hematoxylin-eosin double staining method. The relative expression level of Dnmt1p mRNA in the whole testis of the F2 TG mouse was ∼25% of C57BL/6J wild-type male mouse (P < 0.05, Student's t-test). There was Dnmt1 protein in seminiferous tubules, especially in spermatids of C57BL/6J wild-type male mouse. However, there was no Dnmt1 protein in seminiferous tubules of the F2 TG mouse. From these results, it was concluded that the expression of Dnmt1p mRNA was associated in some way with the translation of the Dnmt1 protein in the mouse testis.
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Okamoto N, Morikawa M, Okamoto K, Iwamoto J, Tomioka K, Saeki K, Yanagi M, Amano N, Kurumatani N. P1-266 Relationship of tooth loss to mild memory impairment and cognitive impairment: findings from the Fujiwara-Kyo study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976e.58] [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: 11/04/2022]
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Abstract
BACKGROUND Physicians report high prevalence of depression, work long hours and are exposed to many occupational stresses (OSs). AIMS To investigate the cross-sectional association between working hours, OS and depression among physicians. METHODS A self-administered questionnaire was mailed to 1902 alumni of a medical school. The questionnaire evaluated working hours in the previous week, OS assessed by the effort-reward imbalance model, social support and depression evaluated by the Center for Epidemiologic Studies Depression scale. The associations between these occupational factors and depression were analyzed using multiple logistic regression. RESULTS The questionnaire was returned by 795 alumni (response rate, 42%), and 706 respondents (534 men and 172 women) were suitable for analysis. The odds ratio (OR) of depression in the long working hours group (>70 h/week) was 1.8 (95% CI: 1.1-2.8) compared with the short working hours group (<54 h/week), adjusted for basic attributes. The adjusted ORs of depression in the upper effort-reward ratio (ERR) tertile versus the lower ERR tertile were 0.6 (0.2-1.8) in the short working hours group, 8.5 (3.0-24.0) in the middle working hours group and 9.9 (3.8-25.7) in the long working hours group. The adjusted ORs of depression stratified according to working hours and ERR tended to be higher in the groups with a higher ERR, but no association between working hours and depression was found. CONCLUSIONS This study indicates that the management of OS is needed as a countermeasure against depression among physicians.
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Affiliation(s)
- K Tomioka
- Department of Community Health and Epidemiology, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521, Japan.
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Hosoya K, Satoh T, Yamamoto Y, Saeki K, Igawa K, Okano M, Moriya T, Imamura O, Nemoto Y, Yokozeki H. Gene silencing of STAT6 with siRNA ameliorates contact hypersensitivity and allergic rhinitis. Allergy 2011; 66:124-31. [PMID: 20608912 DOI: 10.1111/j.1398-9995.2010.02440.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Silencing of genes using small interfering RNA (siRNA) is a recently developed strategy to regulate the synthesis of target molecules. Signal transducer and activator of transcription 6 (STAT6) is a nuclear transcription factor that mediates Th2-type immunity. METHODS To elucidate the therapeutic potential of using siRNA to inhibit STAT6 in allergic reactions, we determined the nucleotide sequences of siRNA specific for STAT6. RESULTS The selected sequences of STAT6 siRNA specifically inhibited the generation of STAT6 synthesis in dermal fibroblasts and eotaxin (CCL11) production in response to IL-4/TNF-α in vitro. Local administration of STAT6 siRNA in vivo alleviated contact hypersensitivity responses to chemical haptens. This was accompanied by reduced local production of IL-4, IL-13, eotaxin (CCL11), TARC (CCL17) and MDC (CCL22). Similarly, consecutive intranasal instillation of STAT6 siRNA markedly inhibited inflammatory cellular infiltration of mucosal tissues in allergic rhinitis responses in association with reduced IL-4 and IL-5 production from regional lymph node cells. Immediate responses, such as sneezing and nasal rubbing behaviors, were also improved by STAT6 siRNA. CONCLUSIONS Local administration of STAT6 siRNA is thus a promising therapeutic strategy for both Th2-mediated cutaneous diseases and allergic rhinitis.
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Affiliation(s)
- K Hosoya
- Department of Dermatology, Graduate School, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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Matsubara K, Lee A, Kamata Y, Magotani M, Saeki K, Matsumoto K, Kishigami S, Hosoi Y. P40. Analysis of acetylation in oocytes and 1-cell embryos. Differentiation 2010. [DOI: 10.1016/j.diff.2010.09.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Versieren K, Heindryckx B, Qian C, Gerris J, De Sutter P, Exposito Navarro A, Ametzazurra A, Nagore D, Crisol L, Aspichueta F, Mendoza R, Matorras R, Garcia MM, Valley JK, Swinton PS, Boscardin WJ, Lue TF, P. Rinaudo, Wu MC, Bern O, Strassburger D, Komarovsky D, Kasterstein E, Komsky A, Maslansky B, Raziel A, Friedler S, Gidoni Y, Ron-El R, Tang J, Fang C, Zhang MF, Li T, Zhuang GL, Suh DS, Joo JK, Choi JR, Kim SC, JO MS, Kim KH, Lee KS, Katz-Jaffe MG, Stevens J, McCormick S, Smith R, Schoolcraft WB, Ben-Ami I, Komsky A, Strassburger D, Bern O, Komarovsky D, Kasterstein E, Maslansky B, Raziel A, Friedler S, Gidoni Y, Ron-El R, Koch J, Costello M, Kilani S, Namm A, Arend A, Aunapuu M, Joo JK, Lee KS, Choi YM, Cho JD, Sipe C, Pelts EJ, Matthews JM, Sanchez SR, Brohammer RLB, Wagner Y, Liebermann J, Uhler M, Beltsos A, Chen MJ, Guu HF, Chen YF, Yih YJ, Ho JYP, Lin TY, Ho ESC, Lopes FB, Figueira RCS, Braga DPAF, Ferreira RC, Aoki T, Iaconelli A, Borges E, Van de Velde H, Cauffman G, Verloes A, De Paepe C, Sterckx J, Van Ranst H, Devroey P, Tournaye H, Liebaers I, Santos MA, Teklenburg G, Macklon NS, Van Opstal D, Schuring-Blom GH, Krijtenburg PJ, de Vreeden-Elbertse J, Fauser BC, Baart EB, Cawood S, Doshi A, Gotts S, Serhal P, Milachich T, Petkova L, Barov D, Shterev A, Esteves TC, Balbach ST, Arauzo-Bravo MJ, Pfeiffer MJ, Boiani M, Le Gac S, van Rossem F, Esteves T, Bioani M, van den Berg A, Valeri C, Pappalardo S, De Felici M, Manna C, Ryu H, Park CY, Min SH, Choi SK, Park C, Lee SH, Kim KR, Jeong H, Chi HJ, Wittemer C, Celebi C, Viville S, Luceno Maestre F, Castilla Alcala JA, Gomez-Palomares JL, Cabello Y, Hernandez J, Marqueta J, Herrero J, Vidal E, Fernandez-Shaw S, Coroleu B, McRae C, Baskind E, Sharma V, Fisher J, Boldi Cotti P, Colasante C, Perego L, De Lauretis L, Montag M, Koster M, Nikolov A, van der Ven H, Lee SG, Lee YC, Kang SM, Kang YJ, Shin YK, Jung JH, Lim JH, Dorfmann A, Carroll K, Sisson M, Geltinger M, Yap S, Iwaszko M, Hara T, Naruse K, Matsuura K, Kodama T, Sato K, Tateaki Y, Tanaka J, Minasi MG, Scarselli F, Rubino P, Casciani V, Colasante A, Lobascio M, Alviggi E, Ferrero S, Litwicka K, Iammarrone E, Cucinelli F, Giannini PG, Tocci A, Nagy ZP, Greco E, Borini A, Tarozzi N, Fiorentin D, Bonu MA, Nadalini M, Johnson J, De Santis L, Bianchi V, Casciani V, Rubino P, Minasi MG, Colasante A, Scarselli F, Lobascio AM, Arizzi L, Iammarrone E, Litwicka K, Ferrero S, Tocci A, Piscitelli C, Cucinelli F, Nagy ZP, Greco E, Mesut N, Ciray HN, Mesut A, Aksoy T, Bahceci M, Lee YM, Chen HW, Wu P, Tzeng CR, Antonova I, Milachich T, Petkova L, Yunakova M, Chaveeva P, A. Shterev, Hlinka D, Dudas M, Rutarova J, Rezacova J, Lazarovska S, Aoi Y, Takahashi H, Saitou H, Takiue C, Kawakami N, Tone M, Hirata R, Terada S, Yoshioka N, Habara T, Hayashi N, Montagut J, Bonald F, Guillen N, Guitard V, Balu-Genvrin E, Crae E, Nogueira D, Silva J, Cunha M, Viana P, Teixeira da Silva JM, Oliveira C, Goncalves A, Barros N, Sousa M, Barros A, van de Werken C, Jahr H, Laven JSE, Baart EB, Gamiz Izquierdo P, De los Santos JM, Tejera A, Pellicer A, Romero JL, Galan A, Albert C, Santos MJDL, Adriaenssens T, Wathlet S, Segers I, Verheyen G, Van De Velde H, Coucke W, Devroey P, Smitz J, Paternot G, D'Hooghe TM, Debrock S, Spiessens C, Hwang HK, Kim HM, Lee JH, Jung YJ, Kang A, Kook MJ, Jung JY, An SJ, Kwon HC, Lee SJ, Somova O, Feskov A, Feskova I, Chumakova N, Zozulina O, Zhilkova YE, Binda M, Campo R, Van Kerkhoven G, Frederickx V, Serneels A, Roziers P, Vranken I, Lopes AS, Van Nuland A, Gordts S, Puttemans P, Valkenburg M, Gordts S, Rodriguez-Arnedo A, Ten J, Guerrero J, Lledo B, Carracedo MA, Ortiz JA, Llacer J, Bernabeu R, Usui K, Nakajo Y, Ota M, Hattori H, Kyoya T, Takisawa T, Kyono K, Ferrieres A, Poulain M, Loup V, Anahory T, Dechaud H, Hamamah S, Eckert J, Premkumar G, Lock F, Brooks S, Haque S, Cameron IT, Cheong Y, Fleming TP, Prados N, Ruiz M, Garcia-Ortega J, Vime P, Hernaez MJ, Crespo M, Fernandez-Sanchez M, Pellicer A, Hashimoto S, Kato N, Saeki K, Morimoto Y, Leung CON, Pang RTK, Liu WM, Lee KF, Yeung WSB, Wada T, Elliott T, Kahn J, Lowderman J, Wright G, Chang C, Bernal D, Kort H, Nagy Z, de los Santos JM, Escrich L, Grau N, Pellicer A, Romero JL, Escriba MJ, Escriba M, Grau N, Escrich L, de los Santos JM, Pellicer A, Romero JL, Tasker F, Hamoda H, Wilner H, Grace J, Khalaf Y, Miyaji S, Mizuno S, Horiuchi L, Haruki A, Fukuda A, Morimoto Y, Utsunomiya T, Kumasako Y, Ito H, Goto K, Koike M, Abe H, Sakamoto T, Kojima F, Koshika T, Muzii L, Magli MC, Gioia L, Scaravelli G, Ferraretti AP, Gianaroli L, Capoti A, Magli MC, Lappi M, Maggi E, Ferraretti AP, Gianaroli L, Scott L, Finn A, Kloos B, Davies D, Yamada M, Hamatani T, Akutsu H, Chikazawa N, Ogawa S, Okumura N, Mochimaru Y, Kuji N, Aoki D, Yoshimura Y, Umezawa A, Aprysko VP, Yakovenko SA, Seregina EA, Yutkin EV, Yelke H, Milik S, Candan ZN, Altin G, Unal S, Atayurt Z, Y. Kumtepe, Chung JT, Son WY, Zhang X, Tan SL, Ao A, Seli E, Botros L, Henson M, Roos P, Judge K, Sakkas D, group MSGMS, Feliciano M, Monahan D, Ermolovich E, Rosenwaks Z, Palermo GD, Mantikou E, van Echten-Arends J, Sikkema-Raddatz B, van der Veen F, Repping S, Mastenbroek S, Botros L, Seli E, Henson M, Roos P, Judge K, Sakkas D, Group MBS, Wells V, Thum MY, Abdalla HI, Machiya R, Akimoto S, Nobuyoshi T, Yoshii N, Hosaka T, Odawara Y, Heindryckx B, Vanden Meerschaut F, Lierman S, Qian C, O'Leary T, Gerris J, De Sutter P, Assou S, Haouzi D, Pellestor F, Monzo C, Dechaud H, De Vos J, Hamamah S, Conaghan J, Fischer E, Popwell J, Ryan I, Chenette P, Givens C, Schriock E, Herbert C, Ermolovich E, Monahan D, Neri QV, Rosenwaks Z, Palermo GD, Verheyen G, Camus M, Van de Velde H, Haentjens P, Devroey P, Mugica A, Esbert M, Molina JM, Garrido N, Pellicer A, Ballesteros A, Calderon G, Rossi ALS, Rocha AM, Alegretti JR, Hassun PA, Gomes LP, Criscuollo T, Serafini P, Motta ELA, Munoz M, Meseguer M, Cruz M, Perez-Cano I, Pellicer A, Gadea B, Martinez M, Fortuno S, Gundersen J, Garrido N, Cruz M, Garrido N, Perez-Cano I, Munoz M, Pellicer A, Martinez M, Gadea B, Selles E, Betersen J, Meseguer M, Le Meaux E, Assou S, Haouzi D, Loup V, Dechaud H, De Vos J, Hamamah S, Ouandaogo G, Assou S, Haouzi D, Ferrieres A, Anahory T, De Vos J, Hamamah S, Monzo C, Assou S, Haouzi D, Pellestor F, Dechaud H, De Vos J, S. Hamamah, Gismano E, Borini A, Cino I, Calzi F, Rabellotti E, Papaleo E, Bianchi V, De Santis L, Sunkara SK, Siozos A, Bolton V, Khalaf Y, Braude P, El-Toukhy T, Cho YS, Ambruosi B, Totaro P, Dell'Aquila ME, Gioacchini G, Bizzaro D, Giorgini E, Ferraris P, Sabbatini S, Carnevali O, Knaggs P, Chau A, Khalil S, Trew G, Lavery S, Jovanovic VP, Gomez R, Sauer CM, Shawber CJ, Outtz HH, Wang X, Sauer MV, Kitajewski J, Zimmermann RC, Mahrous E, Clarke H, Virant-Klun I, Bacer-Kermavner L, Mivsek J, Tomazevic T, Pozlep B, Zorn B, Vrtacnik-Bokal E, Dundure I, Bazarova J, Fodina V, Brikune J, Lakutins J, Jee B, Jo J, Lee J, Suh C, Kim S, Moon S, Shufaro Y, Lebovich M, Aizenman E, Simon A, Laufer N, A. Saada Reisch, Ribeiro MA, Pinto A, Gomes F, Silva Carvalho JL, Almeida H, Massaro FC, Petersen CG, Mauri AL, Silva LFI, Nicoletti APM, Cavagna M, Pontes A, Baruffi RLR, Oliveira JBA, Franco JG, Valcarcel A, Viglierchio MI, Tiveron M, Guidobono M, Inza R, Vilela M, Vilela M, Valcarcel A, Viglierchio MI, Kenny A, Lombardi C, Marconi G. Posters * Embryology (Embryo Selection). Hum Reprod 2010. [DOI: 10.1093/humrep/de.25.s1.140] [Citation(s) in RCA: 2] [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: 11/14/2022] Open
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Okamoto N, Nakatani T, Okamoto Y, Iwamoto J, Saeki K, Kurumatani N. Increasing the Number of Steps Walked Each Day Improves Physical Fitness in Japanese Community-Dwelling Adults. Int J Sports Med 2010; 31:277-82. [DOI: 10.1055/s-0029-1234057] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Mitani T, Morita M, Anzai M, Nishiyama Y, Moriki K, Kawamura H, Kato H, Saeki K, Hosoi Y, Iritani A. 70 FIBROBLAST GROWTH FACTOR 4 PROMOTES THE DEVELOPMENT OF SOMATIC CELL NUCLEAR TRANSFER EMBRYOS IN MICE. Reprod Fertil Dev 2010. [DOI: 10.1071/rdv22n1ab70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Somatic cell nuclear transfer (SCNT) embryos can develop during the preimplantation period; however, most of these die after implantation period. A transcription factor, Cdx2, promotes differentiation of extraembryonic tissues and appears to be involved in the segregation of inner cell mass (ICM) and trophectoderm (TE) in preimplantation embryos. So far, we have demonstrated that the expression of Cdx2 in mouse SCNT embryos is delayed and its expression level is significantly lower than that in intracytoplasmic sperm injection (ICSI) embryos. Moreover, the ectopic expression of Oct-3/4 was observed in the TE tissues of SCNT blastocysts, but not in ICSI blastocysts. Fibroblast growth factor (FGF) receptor 2 (FGFR2) is specifically expressed in 8-cell to morula-stage embryos and trophectoderm (TE) and is essential for implantation; however, FGFR2 expression in SCNT embryos significantly decreases compared with IVF embryos. Therefore, it is likely that abnormality of differentiation that is controlled in development of pre-implantation in SCNT embryos leads to a rapid decrease of subsequent developmental ability. Then, we investigated the effects of FGF4 on development of SCNT embryos. Mouse SCNT embryos were produced according to the method reported previously (Wakayama et al. 1998). B6D2F1 and B6C3F1 female mice were used for the collection of recipient oocytes and donor cells, respectively. Data were analyzed by Student’s t-test. First, the timing to start adding FGF4 was decided by FGFR2 expression time about 54 h after cell injection and treated for 3, 6, 12, 24, and 42 h thereafter. In the case of FGF4 concentration at 25 ng mL-1 with treating time of 6 h from the 4- to 8-cell stages, SCNT embryos significantly promoted the development to morula and blastocyst stages (91 and 45%, respectively) compared with IVF embryos (80 and 30%, respectively; P < 0.05). However, longer treatment of 42 h with FGF4 made their morphology considerably worse. Then, concentrations of FGF4 at 5, 25, 50, 250, and 500 ng mL-1 with treating time of 6 h was examined. In case of FGF4 concentration at 25 and 50 ng mL-1, SCNT embryos significantly promoted the development to morula and blastocyst stages (P < 0.05). Immunohistochemical analysis showed segregation of the expression of Oct-3/4 and Cdx2 in ICM and TE, respectively, in FGF4-treated SCNT embryos, unlike in the case of nontreated SCNT embryos, which showed an ectopic expression of Oct-3/4 in TE tissues. Furthermore, after the transplantation of SCNT embryos treated with FGF4 at 50 ng mL-1 and the treating time of 6 h to recipient mice, most of the transferred embryos implanted and cloned mice were successfully produced as well as nontreated SCNT embryos. Therefore, FGF4 facilitates the development of SCNT embryos especially to the morula and blastocyst stages.
This work was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science.
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Saeki K, Kato H, Hosoi Y, Miyake M, Utsumi K, Iritani A. Early morphological events of in vitro fertilized bovine oocytes with frozen-thawed spermatozoa. Theriogenology 2009; 35:1051-8. [PMID: 16726971 DOI: 10.1016/0093-691x(91)90314-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/1990] [Accepted: 01/14/1991] [Indexed: 10/26/2022]
Abstract
Bovine follicular oocytes were matured and inseminated in vitro with spermatozoa capacitated in vitro. The first evidence of sperm penetration was observed at 3 h after insemination. The penetration rate increased until 5 h, and reached a maximum rate (92%) at 5 h. Decondensation of the sperm head and pronuclear formation were observed 4 h and 7 h after insemination, respectively. Female chromatins of all penetrated oocytes were activated at 3 h, and female pronuclei were formed at 7 h after insemination. Percentages of oocytes with male and female pronuclei at 9 h were 88 and 94%. Polyspermy (4, 7, 19 and 29% at 4, 5, 7 and 9 h after insemination, respectively) and abnormal development of male pronuclei (6 and 7% at 7 and 9 h after insemination, respectively) were also seen.
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Affiliation(s)
- K Saeki
- Department of Animal Science, College of Agriculture, Kyoto University, Kyoto, 606 Japan
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Hashimoto S, Iwamoto D, Taniguchi S, Saeki K, Kato N, Morimoto Y. Successful culture and time-lapse photography of individual human embryos using non-porous poly-(dimethylsiloxane) micro-well plates. Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Takeyama N, Ano Y, Wu G, Kubota N, Saeki K, Sakudo A, Momotani E, Sugiura K, Yukawa M, Onodera T. Localization of insulinoma associated protein 2, IA-2 in mouse neuroendocrine tissues using two novel monoclonal antibodies. Life Sci 2009; 84:678-87. [PMID: 19233214 DOI: 10.1016/j.lfs.2009.02.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Revised: 02/02/2009] [Accepted: 02/10/2009] [Indexed: 11/19/2022]
Abstract
AIMS Insulinoma-associated protein 2 (IA-2) is a member of the protein tyrosine phosphatase family that is localized on the insulin granule membrane. IA-2 is also well known as one of the major autoantigens in Type 1 diabetes mellitus. IA-2 gene deficient mice were recently established and showed abnormalities in insulin secretion. Thus, detailed localization of IA-2 was studied using wild-type and IA-2 gene deficient mice. MAIN METHODS To localize IA-2 expression in mouse neuroendocrine tissues, monoclonal antibodies were generated against IA-2 and western blot and immunohistochemical analyses were carried out in IA-2(+/+) mice. IA-2(-/-) mice served as a negative control. KEY FINDINGS Western blot analysis revealed that the 65 kDa form of IA-2 was observed in the cerebrum, cerebellum, medulla oblongata, pancreas, adrenal gland, pituitary gland, muscular layers of the stomach, small intestine, and colon. By immunohistochemical analysis, IA-2 was produced in endocrine cells in pancreatic islets, adrenal medullary cells, thyroid C-cells, Kulchitsky cells, and anterior, intermediate, and posterior pituitary cells. In addition, IA-2 was found in somatostatin-producing D-cells and other small populations of cells were scattered in the gastric corpus. IA-2 expression in neurites was confirmed by the immunostaining of IA-2 using primary cultured neurons from the small intestine and nerve growth factor (NGF)-differentiated PC12 cells. SIGNIFICANCE The IA-2 distribution in peripheral neurons appeared more intensely in neurites rather than in the cell bodies.
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Affiliation(s)
- Natsumi Takeyama
- Department of Molecular Immunology, School of Agricultural and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
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