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Sakai Y, Matsumura M, Iwao T, Matsunaga T. Culture methods focusing on bile canalicular formation using primary human hepatocytes in a short time. In Vitro Cell Dev Biol Anim 2023; 59:606-614. [PMID: 37682508 DOI: 10.1007/s11626-023-00805-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 08/23/2023] [Indexed: 09/09/2023]
Abstract
The development of models for predicting hepatotoxicity is warranted, as the hepatotoxicity risk of 38-51% of compounds is undetectable in nonclinical studies. Cholestatic drug-induced liver injury (DILI) is a condition in which bile acids are abnormally excreted into the capillary bile canaliculi and are accumulated in hepatocytes, caused by the inhibition of bile salt export pump (BSEP), a transporter that is mainly associated with excretion of bile acids. Although laboratory animals are used as models, the use of human-derived cells is required owing to species differences. Unfortunately, primary human hepatocytes (PHHs) show rapid loss of function in culture and difficulties in forming bile canaliculi. Therefore, we aimed to develop an in vitro culture method for the efficient formation of bile canaliculi and for assessing the function of BSEP in PHHs. Here, PHHs were cultured from 1 h after thawing to day 2 with Z-VAD-FMK, a total caspase inhibitor, and RevitaCell™ supplement, an irreversible Rho-associated coiled-coil forming kinase (ROCK) inhibitor, in combination with RM-101. The PHHs formed bile canaliculi and showed BSEP function on day 6 of culture. Our findings suggest that cultured PHHs may improve the prediction accuracy of the risks of cholestatic DILI-contained toxicity on bile canaliculi.
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Affiliation(s)
- Yoko Sakai
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-Dori, Mizuho-Ku, Nagoya, 467-8603, Japan
- Laboratory of Biological Chemistry, School of Pharmaceutical Sciences, Wakayama Medical University, Wakayama, Japan
| | - Masanari Matsumura
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-Dori, Mizuho-Ku, Nagoya, 467-8603, Japan
| | - Takahiro Iwao
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-Dori, Mizuho-Ku, Nagoya, 467-8603, Japan.
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-Dori, Mizuho-Ku, Nagoya, 467-8603, Japan
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Sharma T, Maehara A, Ben-Yehuda O, Maeng M, Kjoller-Hansen L, Engstrom T, Matsumura M, Frobert O, Persson J, Wiseth R, Larsen AI, James SK, Ali ZA, Stone GW, Erlinge D. Biomarkers associated with vulnerable plaques. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Cardiovascular heart disease is the leading cause of mortality worldwide, with the rupture or thrombosis of an atherosclerotic plaque being the main reason behind an acute coronary syndrome. It has already been established that the morphology of atherosclerotic plaques determine their stability. A lipid rich lesion with a thin fibrous cap is more prone to rupture compared to solid fibrous lesions. In the PROSPECTII study we used Near infrared spectroscopy (NIRS) and Intravascular ultrasound (IVUS) to identify atherosclerotic plaques in the coronary arteries; NIRS-derived lipid core burden index (LCBI) and IVUS-derived plaque burden (PB) identified plaques that caused adverse cardiovascular events.
Purpose
Our aim is to find biomarkers associated with LCBI or PB, to understand the development of vulnerable plaques.
Methods
902 patients were enrolled in this study after successful percutaneous coronary intervention (PCI). A combined NIRS-IVUS catheter was then used to analyze approximately 200m of coronary arteries. Blood samples for biomarker analysis were taken before the PCI procedure and plasma levels of 182 proteins associated with cardiovascular disease were assessed using a novel method for measuring proximity extension assay. Adjusted linear regression models were calculated between the biomarkers and the outcomes of interest, followed by a false discovery rate (FDR) correction.
Results
We found 24 proteins associated with plaque burden and 28 proteins associated with LCBI after using a cut off of two tailed P value <0.05. An overlap of 8 biomarkers could be seen between the two groups. After adjusting the P values with FDR, Angiopoeitin like 3 (ANGPTL3) retained its association to LCBI, and Interleukin 18 receptor 1 (IL18R1) and colony stimulating factor 1 (CSF-1) to plaque burden.
Conclusion
We were able to identify different biomarker patterns associated with plaque burden compared to lipid rich vulnerable plaques. ANGPTL3 was shown to only have an association with lipid rich plaques and not with solid fibrous lesions which further supports its role in vulnerable plaques.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): Abbott Vascular, Infraredx, and The Medicines Company
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Affiliation(s)
| | - A Maehara
- Columbia University Medical Center , New York , United States of America
| | - O Ben-Yehuda
- Cardiovascular Research Foundation , New York , United States of America
| | - M Maeng
- Aarhus University Hospital , Aarhus , Denmark
| | | | - T Engstrom
- University of Copenhagen , Copenhagen , Denmark
| | - M Matsumura
- Cardiovascular Research Foundation , New York , United States of America
| | - O Frobert
- Orebro University, Faculty of Health , Orebro , Sweden
| | - J Persson
- Danderyd University Hospital , Stockholm , Sweden
| | - R Wiseth
- St Olavs Hospital , Trondheim , Norway
| | - A I Larsen
- Stavanger University Hospital , Stavanger , Norway
| | - S K James
- Uppsala University Hospital and Uppsala Clinical Research Center , Uppsala , Sweden
| | - Z A Ali
- Columbia University Medical Center , New York , United States of America
| | - G W Stone
- The Zena and Michael A. Wiener Cardiovascular Institute , New York , United States of America
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Petersen K, Schaap M, Mirza S, Ng N, Maehara A, Matsumura M, Safian R. 452 Quantitative Assessment Of AI-based CCTA Plaque Volume Compared With IVUS. J Cardiovasc Comput Tomogr 2022. [DOI: 10.1016/j.jcct.2022.06.057] [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: 10/17/2022]
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Ding LL, Matsumura M, Obitsu T, Sugino T. Phytol supplementation alters plasma concentrations of formate, amino acids, and lipid metabolites in sheep. Animal 2021; 15:100174. [PMID: 33610515 DOI: 10.1016/j.animal.2021.100174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 12/22/2020] [Accepted: 01/05/2021] [Indexed: 11/29/2022] Open
Abstract
The phytol moiety in chlorophyll molecules acts as an agonist of peroxisome proliferator-activated receptor-α in monogastric animals. The current study aimed to clarify the effects of dietary supplementation with phytol on the plasma concentrations of formate and amino acids related to one-carbon (1C) donors and its effects on lipid metabolism in sheep. Four mature sheep were fed with a mixed ration (metabolizable energy, 10.7 MJ/kg DM; CP, 150 g/kg DM) comprising barley, rice bran, soybean meal, and oat hay at 1.5 times maintenance metabolizable energy for three consecutive 14-day experimental periods. The first and third periods served as controls without phytol supplementation, while in the second period, phytol was added to the mixed ration at 12 g/kg of dietary DM per day. In each period, feces, urine, and jugular blood samples were collected. Dry matter intake in relation to metabolic BW was slightly lower (P < 0.01) in the first period than the second and third periods but did not differ between the latter two periods. Dry matter digestibility was slightly reduced (P = 0.05) by the phytol treatment. Nitrogen (N) intake and retention showed similar trends to DM intake, but urinary N was unchanged among the periods. Plasma cholesterol and phospholipid concentrations decreased during the phytol treatment period, while triglyceride concentration increased (P < 0.05). In the phytol treatment period, the plasma concentrations of serine and glycine (1C donors) increased, but the glutamate level decreased (P < 0.01). Plasma concentrations of formate and methionine increased (P < 0.01) from the first control period to the phytol supplementation period, but homocysteine and cysteine (intermediate and by-product of the methionine cycle) levels were unchanged among the treatment periods. In conclusion, dietary phytol affects lipid metabolism as well as amino acid metabolism and 1C donors in sheep. These effects may be associated with the activity of phytol as an agonist of the nuclear receptors, although this needs further investigation.
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Affiliation(s)
- L L Ding
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - M Matsumura
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - T Obitsu
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan.
| | - T Sugino
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
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Kakehi E, Kotani K, Otsuka Y, Fukuyasu Y, Hashimoto Y, Sakurai S, Hirotani A, Simizu K, Fujita R, Shoji K, Adachi S, Matsumura M. Response to: Kimura's disease: effects of age on clinical presentation. QJM 2020; 113:383. [PMID: 32091606 DOI: 10.1093/qjmed/hcaa035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- E Kakehi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - K Kotani
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Y Otsuka
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - Y Fukuyasu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - Y Hashimoto
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - S Sakurai
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - A Hirotani
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - K Simizu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - R Fujita
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - K Shoji
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - S Adachi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - M Matsumura
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Kakehi E, Kotani K, Otsuka Y, Fukuyasu Y, Hashimoto Y, Sakurai S, Hirotani A, Simizu K, Fujita R, Shoji K, Adachi S, Matsumura M. Kimura's disease: effects of age on clinical presentation. QJM 2020; 113:336-345. [PMID: 31800058 DOI: 10.1093/qjmed/hcz312] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 11/11/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Kimura's disease (KD) is known to be dominant among young Asian men, but it can also occur in middle- and advanced-aged people. The clinical characteristics of KD, especially by age, are not well known. AIM This study was performed to investigate the effects of age on the clinical characteristics of KD. DESIGN We conducted a case series study. METHODS All case studies of patients diagnosed with KD were collected via a PubMed search of studies published until August 2018. The data were analyzed by age group. RESULTS In total, 215 studies were reviewed (238 patients; mean age of 36 years). The male:female ratio was 4:1 overall, 17:1 in patients aged <20 years, 4:1 in patients aged 20-39 years and 2:1 in patients aged ≥40 years (P = 0.01). The percentage of patients with pruritus was 15.4% overall, 3.8% in patients aged <20 years, 15.5% in patients aged 20-39 years and 21.7% in patients aged ≥40 years (P = 0.02). The time to diagnosis was 5.3 years overall, 3.2 years in patients aged <20 years, 4.7 years in patients aged 20-39 years and 7.1 years in patients aged ≥40 years (P < 0.01). CONCLUSIONS The proportion of female patients affected the incidence of pruritus, and the time to diagnosis increased as the patients' age increased. There were no significant age-related differences in region/race, complications, multiplicity, laterality, anatomical distribution, maximum size, eosinophil count, immunoglobulin E level, initial treatment, recurrence or outcomes. This may be useful information for the diagnosis of KD.
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Affiliation(s)
- E Kakehi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - K Kotani
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Y Otsuka
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - Y Fukuyasu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - Y Hashimoto
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - S Sakurai
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - A Hirotani
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - K Simizu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - R Fujita
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - K Shoji
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - S Adachi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - M Matsumura
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Matsumura M, Mizutani E, Suzuki T, Tsurumi H, Uni R, Higashihara T, Nakahara K, Takano H. Successful Diagnosis and Treatment of Peritoneal Dialysis-Related Pleuroperitoneal Communication by Contrast-Enhanced Ultrasonography and Thoracoscopic Surgery. Perit Dial Int 2018; 37:485-486. [PMID: 28676518 DOI: 10.3747/pdi.2016.00295] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- M Matsumura
- Department of Nephrology, Tokyo Teishin Hospital, Japan
| | - E Mizutani
- Department of Thoracic Surgery, Tokyo Teishin Hospital, Japan
| | - T Suzuki
- Department of Radiology, Tokyo Teishin Hospital, Japan
| | - H Tsurumi
- Department of Nephrology, Tokyo Teishin Hospital, Japan
| | - R Uni
- Department of Nephrology, Tokyo Teishin Hospital, Japan
| | - T Higashihara
- Department of Nephrology, Tokyo Teishin Hospital, Japan
| | - K Nakahara
- Department of Thoracic Surgery, Tokyo Teishin Hospital, Japan
| | - H Takano
- Department of Nephrology, Tokyo Teishin Hospital, Japan
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Hashimoto A, Hirayama K, Takahashi H, Matsumura M, Okada G, Chen C, Huang J, Kakishima M, Ono T, Tanaka K. Resolving the Lophiostoma bipolare complex: Generic delimitations within Lophiostomataceae. Stud Mycol 2018; 90:161-189. [PMID: 29632417 PMCID: PMC5889712 DOI: 10.1016/j.simyco.2018.03.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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] [Indexed: 11/24/2022] Open
Abstract
Lophiostoma bipolare was taxonomically revised based on the morphological observations and phylogenetic analyses of molecular data from nuclear rDNA SSU-ITS-LSU, TUB, tef1, and rpb2 genes. Twenty-nine strains were morphologically similar to Lo. bipolare. A total of 174 sequences were generated from the Lo. bipolare complex. Phylogenetic analyses based on TUB sequence revealed 11 distinct species within the Lo. bipolare complex. Morphological features of the ascospores and the anatomical structure of the ascomata from both field collections as well as axenic culture, which have been reported previously as variable features at intraspecific levels, were compared to evaluate the taxonomic reliability of these features. To clarify the generic position of the 11 species, phylogenetic analyses were done on SSU-ITS-LSU-tef1-rpb2 gene sequences. The Lo. bipolare complex shared phylogenetic relationships with Pseudolophiostoma and Vaginatispora, and formed an additional five distinct clades from other members of Lophiostomataceae. According to its phylogenetic position, Lo. bipolare sensu stricto was distantly related to Lophiostoma s. str., and formed an independent clade within Lophiostomataceae. Lophiostoma bipolare s. str. could be distinguished from the other lophiostomataceous genera by the clypeus around the ostiolar neck and by the thin and uniformly thick peridium. A novel genus described as Lentistoma was established to accommodate this species, and the epitypification of Lentistoma bipolare (basionym: Massarina bipolaris) was proposed. Other lineages of the Lo. bipolare complex could not be separated on the basis of the ascospore size and sheath variations, but were distinguished based on ascomatal features, such as the existence of the clypeus, brown hyphae surrounding the peridium, and the contexture of the peridium, which were stable indicators of generic boundaries in Lophiostomataceae. Four additional new genera with five new species were recognised based on these morphological differences: Crassiclypeus (C. aquaticus), Flabellascoma (F. cycadicola and F. minimum), Leptoparies (Lep. palmarum), and Pseudopaucispora (Pseudop. brunneospora). Three new species were added to Pseudolophiostoma (Pseudol. cornisporum, Pseudol. obtusisporum, and Pseudol. tropicum) and two new species were added to Vaginatispora (V. amygdali and V. scabrispora). The re-evaluation of the validity of several previously recognised genera resulted in the introduction of two new genera with new combinations for Lophiostoma pseudoarmatisporum as Parapaucispora pseudoarmatispora and Vaginatispora fuckelii as Neovaginatispora fuckelii.
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Key Words
- 1 new typification
- 21 new taxa
- Crassiclypeus A. Hashim., K. Hiray. & Kaz. Tanaka
- Crassiclypeus aquaticus A. Hashim., K. Hiray. & Kaz. Tanaka
- Flabellascoma A. Hashim., K. Hiray. & Kaz. Tanaka
- Flabellascoma cycadicola A. Hashim., K. Hiray. & Kaz. Tanaka
- Flabellascoma minimum A. Hashim., K. Hiray. & Kaz. Tanaka
- Freshwater fungi
- Lentistoma A. Hashim., K. Hiray. & Kaz. Tanaka
- Lentistoma bipolare (K.D. Hyde) A. Hashim., K. Hiray. & Kaz. Tanaka
- Leptoparies A. Hashim., K. Hiray. & Kaz. Tanaka
- Leptoparies palmarum A. Hashim., K. Hiray. & Kaz. Tanaka
- Massarina bipolaris K.D. Hyde
- Neovaginatispora A. Hashim., K. Hiray. & Kaz. Tanaka
- Neovaginatispora fuckelii (Sacc.) A. Hashim., K. Hiray. & Kaz. Tanaka
- Parapaucispora A. Hashim., K. Hiray. & Kaz. Tanaka
- Parapaucispora pseudoarmatispora (Hay. Takah. et al.) A. Hashim., K. Hiray. & Kaz. Tanaka
- Pleosporales
- Pseudolophiostoma cornisporum A. Hashim., K. Hiray. & Kaz. Tanaka
- Pseudolophiostoma obtusisporum A. Hashim., K. Hiray. & Kaz. Tanaka
- Pseudolophiostoma tropicum A. Hashim., K. Hiray. & Kaz. Tanaka
- Pseudopaucispora A. Hashim., K. Hiray. & Kaz. Tanaka
- Pseudopaucispora brunneospora A. Hashim., K. Hiray. & Kaz. Tanaka
- Species complex
- Systematics
- Taxonomy
- Vaginatispora amygdali A. Hashim., K. Hiray. & Kaz. Tanaka
- Vaginatispora scabrispora A. Hashim., K. Hiray. & Kaz. Tanaka
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Affiliation(s)
- A. Hashimoto
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
- Research Fellow of the Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | - K. Hirayama
- Apple Experiment Station, Aomori Prefectural Agriculture and Forestry Research Center, 24 Fukutami, Botandaira, Kuroishi, Aomori 036-0332, Japan
| | - H. Takahashi
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - M. Matsumura
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
- The United Graduate School of Agricultural Sciences, Iwate University, 18–8 Ueda 3 chome, Morioka, Iwate 020-8550, Japan
| | - G. Okada
- Japan Collection of Microorganisms, RIKEN BioResource Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan
| | - C.Y. Chen
- National Chung Hsing University, 145 Xingda Rd., South Dis., Taichung 402, Taiwan, ROC
| | - J.W. Huang
- College of Agriculture and Natural Resources, National Chung Hsing University, 250 Kuo-kuang Rd., Taichung 402, Taiwan, ROC
| | - M. Kakishima
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, Jilin Province 130118, China
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan
| | - T. Ono
- Ogasawara Subtropical Branch of Tokyo Metropolitan Agriculture and Forestry Research Center, Chichijima, Ogasawara-mura, Tokyo 100-2101, Japan
| | - K. Tanaka
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
- The United Graduate School of Agricultural Sciences, Iwate University, 18–8 Ueda 3 chome, Morioka, Iwate 020-8550, Japan
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10
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Matsumura M. The influence of the health condition of the caregiver the care environment and the prognosis of patients with Alzheimer’s disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hashimoto A, Matsumura M, Hirayama K, Fujimoto R, Tanaka K. Pseudodidymellaceae fam. nov.: Phylogenetic affiliations of mycopappus-like genera in Dothideomycetes. Stud Mycol 2017; 87:187-206. [PMID: 28794574 PMCID: PMC5542424 DOI: 10.1016/j.simyco.2017.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The familial placement of four genera, Mycodidymella, Petrakia, Pseudodidymella, and Xenostigmina, was taxonomically revised based on morphological observations and phylogenetic analyses of nuclear rDNA SSU, LSU, tef1, and rpb2 sequences. ITS sequences were also provided as barcode markers. A total of 130 sequences were newly obtained from 28 isolates which are phylogenetically related to Melanommataceae (Pleosporales, Dothideomycetes) and its relatives. Phylogenetic analyses and morphological observation of sexual and asexual morphs led to the conclusion that Melanommataceae should be restricted to its type genus Melanomma, which is characterised by ascomata composed of a well-developed, carbonaceous peridium, and an aposphaeria-like coelomycetous asexual morph. Although Mycodidymella, Petrakia, Pseudodidymella, and Xenostigmina are phylogenetically related to Melanommataceae, these genera are characterised by epiphyllous, lenticular ascomata with well-developed basal stroma in their sexual morphs, and mycopappus-like propagules in their asexual morphs, which are clearly different from those of Melanomma. Pseudodidymellaceae is proposed to accommodate these four genera. Although Mycodidymella and Xenostigmina have been considered synonyms of Petrakia based on sexual morphology, we show that they are distinct genera. Based on morphological observations, these genera in Pseudodidymellaceae are easily distinguished by their synasexual morphs: sigmoid, multi-septate, thin-walled, hyaline conidia (Mycodidymella); globose to ovoid, dictyosporus, thick-walled, brown conidia with cellular appendages (Petrakia); and clavate with a short rostrum, dictyosporus, thick-walled, brown conidia (Xenostigmina). A synasexual morph of Pseudodidymella was not observed. Although Alpinaria was treated as member of Melanommataceae in a previous study, it has hyaline cells at the base of ascomata and pseudopycnidial, confluent conidiomata which is atypical features in Melanommataceae, and is treated as incertae sedis.
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Affiliation(s)
- A Hashimoto
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan.,Research Fellow of the Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo, 102-0083, Japan
| | - M Matsumura
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan.,The United Graduate School of Agricultural Sciences, Iwate University, 18-8 Ueda 3 chome, Morioka, 020-8550, Japan
| | - K Hirayama
- Apple Experiment Station, Aomori Prefectural Agriculture and Forestry Research Centre, 24 Fukutami, Botandaira, Kuroishi, Aomori, 036-0332, Japan
| | - R Fujimoto
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan
| | - K Tanaka
- Faculty of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan.,The United Graduate School of Agricultural Sciences, Iwate University, 18-8 Ueda 3 chome, Morioka, 020-8550, Japan
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Nakatani Y, Maeda M, Matsumura M, Shimizu R, Banba N, Aso Y, Yasu T, Harasawa H. Effect of GLP-1 receptor agonist on gastrointestinal tract motility and residue rates as evaluated by capsule endoscopy. Diabetes Metab 2017. [PMID: 28648835 DOI: 10.1016/j.diabet.2017.05.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
AIM This study evaluated the effects of a glucagon-like peptide-1 receptor agonist on gastrointestinal (GI) tract motility and residue rates by examining GI transit time and lumen using capsule endoscopy. MATERIAL AND METHODS GI motility and lumen were assessed by capsule endoscopy before and after liraglutide administration in 14 patients with type 2 diabetes mellitus (T2DM). RESULTS Gastric transit time in the group with diabetic neuropathy (DN) was 1:12:36±1:04:30h before liraglutide administration and 0:48:40±0:32:52h after administration (nonsignificant difference, P=0.19). Gastric transit time in the non-DN group was 1:01:30±0:52:59h before administration and 2:33:29±1:37:24h after administration (significant increase, P=0.03). Duodenal and small intestine transit time in the DN group was 4:10:34±0:25:54h before and 6:38:42±3:52:42h after administration (not significant, P=0.09) and, in the non-DN group, 3:51:03±0:53:47h before and 6:45:31±2:41:36h after administration (significant increase, P=0.03). The GI residue rate in the DN group was 32.1±24% before administration and 90.0±9.1% after administration (significant increase, P<0.001), and increased in all patients; in the non-DN group, it was 32.1±35.3% before and 78.3±23.9% after administration (significant increase, P<0.001), and also increased in all patients. CONCLUSION Liraglutide causes delayed gastric emptying and inhibits duodenal and small intestine motility. However, these GI movement-inhibiting effects may be decreased or absent in patients with DN-associated dysautonomia.
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Affiliation(s)
- Y Nakatani
- Department of Diabetes and Endocrinology, Dokkyo Medical University Nikko Medical Center, 632, Takatoku Nikkoshi, 321-2593 Tochigi, Japan.
| | - M Maeda
- Department of Gastroenterology, Dokkyo Medical University Nikko Medical Center, 632, Takatoku Nikkoshi, 321-2593 Tochigi, Japan
| | - M Matsumura
- Department of Endocrinology and Metabolism, Dokkyo Medical University, 880, Kitakobayashi Shimotsugagun Mibumachi, 321-0293 Tochigi, Japan
| | - R Shimizu
- Department of Cardiovascular Medicine, Dokkyo Medical University Nikko Medical Center, 632, Takatoku Nikkoshi, 321-2593 Tochigi, Japan
| | - N Banba
- Department of Diabetes and Endocrinology, Dokkyo Medical University Nikko Medical Center, 632, Takatoku Nikkoshi, 321-2593 Tochigi, Japan
| | - Y Aso
- Department of Endocrinology and Metabolism, Dokkyo Medical University, 880, Kitakobayashi Shimotsugagun Mibumachi, 321-0293 Tochigi, Japan
| | - T Yasu
- Department of Cardiovascular Medicine, Dokkyo Medical University Nikko Medical Center, 632, Takatoku Nikkoshi, 321-2593 Tochigi, Japan
| | - H Harasawa
- Department of Pulmonary Medicine, Dokkyo Medical University Nikko Medical Center, 632, Takatoku Nikkoshi, 321-2593 Tochigi, Japan
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Andrews J, Nguyen T, Janssan A, Vidanapathirana A, Pullen B, Schwarz N, Maehara A, Matsumura M, Yamamoto M, Kini A, Shah P, Muller J, Stone G, Mintz G, Weisz G, Nicholls S. Increased Lipid-Rich Plaque but not Greater Plaque Burden in Myocardial Infarction Lesions: The Color Registry. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Nguyen T, Andrews J, Janssan A, Vidanapathirana A, Pullen B, Schwarz N, Weisz G, Matsumura M, Yamamoto M, Kini A, Shah P, Muller J, Mintz G, Stone G, Maehara A, Nicholls S. Plaque Characterisation Informs the Risk of Peri-MI During PCI: The COLOR Registry. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Janssan A, Andrews J, Nguyen T, Vidanapathirana A, Pullen B, Schwarz N, Maehara A, Matsumura M, Yamamoto M, Kini A, Shah P, Muller J, Stone G, Mintz G, Weisz G, Nicholls S. Lower Plaque Lipid Content on Near-Infrared Spectroscopy in Statin-Treated Patients: Insights from the Color Registry. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.115] [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: 11/28/2022]
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16
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Terada T, Matsumura M, Abe A, Morita Y, Adachi H, Nanjo H. Irreversible inactivation of glutathione S-transferase-π by a low concentration of naphthoquinones. Redox Rep 2016; 1:125-30. [PMID: 27405555 DOI: 10.1080/13510002.1995.11746970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
π-Class glutathione S-transferase (GST-π) was very potently inactivated by oxidants such as H2O2, xanthine-xanthine oxidase and naphthoquinones. Thiols and glutathione analogs including dithiothreitol, reduced gluta-thione, cysteine, cysteamine, S-methyl-SG, S-hexyl-SG and S-decyl-SG protected GST-π from the inactivation, but a substrate analog (2,4-dinitrophenol), superoxide dismutase and catalase did not, suggesting that the cysteinyl residue(s) in/nearby the glutathione binding site (G-site) may be oxidatively modified by these oxidants. Many reductants and radical scavengers including butylated hydoxytoluene, α-tocopherol, ascorbate, uric acid, mannitol, tyrosine, tryptophan, histidine, quercitrin and bilirubin had no effect on the inactivation. GST-π pretreated with cystamine was reactivated very efficiently by 50 mM DTT following incubation with 1,2-naphthoquinone, whereas cystamine-untreated GST-π was not reactivated.
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Affiliation(s)
- T Terada
- a Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences , Osaka University , Osaka , Japan
| | - M Matsumura
- a Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences , Osaka University , Osaka , Japan
| | - A Abe
- a Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences , Osaka University , Osaka , Japan
| | - Y Morita
- a Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences , Osaka University , Osaka , Japan
| | - H Adachi
- a Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences , Osaka University , Osaka , Japan
| | - H Nanjo
- a Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences , Osaka University , Osaka , Japan
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17
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Tanaka K, Hirayama K, Yonezawa H, Sato G, Toriyabe A, Kudo H, Hashimoto A, Matsumura M, Harada Y, Kurihara Y, Shirouzu T, Hosoya T. Revision of the Massarineae (Pleosporales, Dothideomycetes). Stud Mycol 2015; 82:75-136. [PMID: 26955201 PMCID: PMC4774272 DOI: 10.1016/j.simyco.2015.10.002] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [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] [Indexed: 11/21/2022] Open
Abstract
We here taxonomically revise the suborder Massarineae (Pleosporales, Dothideomycetes, Ascomycota). Sequences of SSU and LSU nrDNA and the translation elongation factor 1-alpha gene (tef1) are newly obtained from 106 Massarineae taxa that are phylogenetically analysed along with published sequences of 131 taxa in this suborder retrieved from GenBank. We recognise 12 families and five unknown lineages in the Massarineae. Among the nine families previously known, the monophyletic status of the Dictyosporiaceae, Didymosphaeriaceae, Latoruaceae, Macrodiplodiopsidaceae, Massarinaceae, Morosphaeriaceae, and Trematosphaeriaceae was strongly supported with bootstrap support values above 96 %, while the clades of the Bambusicolaceae and the Lentitheciaceae are moderately supported. Two new families, Parabambusicolaceae and Sulcatisporaceae, are proposed. The Parabambusicolaceae is erected to accommodate Aquastroma and Parabambusicola genera nova, as well as two unnamed Monodictys species. The Parabambusicolaceae is characterised by depressed globose to hemispherical ascomata with or without surrounding stromatic tissue, and multi-septate, clavate to fusiform, hyaline ascospores. The Sulcatisporaceae is established for Magnicamarosporium and Sulcatispora genera nova and Neobambusicola. The Sulcatisporaceae is characterised by subglobose ascomata with a short ostiolar neck, trabeculate pseudoparaphyses, clavate asci, broadly fusiform ascospores, and ellipsoid to subglobose conidia with or without striate ornamentation. The genus Periconia and its relatives are segregated from the Massarinaceae and placed in a resurrected family, the Periconiaceae. We have summarised the morphological and ecological features, and clarified the accepted members of each family. Ten new genera, 22 new species, and seven new combinations are described and illustrated. The complete ITS sequences of nrDNA are also provided for all new taxa for use as barcode markers.
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Affiliation(s)
- K. Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - K. Hirayama
- Apple Experiment Station, Aomori Prefectural Agriculture and Forestry Research Center, 24 Fukutami, Botandaira, Kuroishi, Aomori 036-0332, Japan
| | - H. Yonezawa
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - G. Sato
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - A. Toriyabe
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - H. Kudo
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - A. Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
- The United Graduate School of Agricultural Sciences, Iwate University, 18-8 Ueda 3 chome, Morioka 020-8550, Japan
| | - M. Matsumura
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - Y. Harada
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori 036-8561, Japan
| | - Y. Kurihara
- OPBIO Factory, 5-8 Suzaki, Uruma, Okinawa 904-2234, Japan
| | - T. Shirouzu
- Department of Botany, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan
| | - T. Hosoya
- Department of Botany, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan
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18
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Matsumura M, Mizuno Y, Okamoto M, Sawa N, Katayama Y, Shimoyama N, Kawagishi N, Miura K. Long-term complete remission of multiple extranodal natural killer/T-cell-type posttransplant lymphoproliferative disorder after surgical resection: a case report. Transplant Proc 2014; 46:2373-6. [PMID: 25011572 DOI: 10.1016/j.transproceed.2014.02.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 02/05/2014] [Accepted: 02/27/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND Posttransplant lymphoproliferative disorder (PTLD) is a life-threatening complication of organ transplantation that results from immunosuppression therapy. Most cases of PTLD derive from the B-cell lineage. T-cell PTLD, particularly natural killer (NK)/T-cell PTLD, is quite rare; only a few cases have been described. CASE REPORT A 42-year-old woman received a living-related renal allograft from her father. Sixteen years after transplantation, the patient presented with a 1-week history of low-grade fever and epigastralgia. Computed tomography revealed intestinal masses and a right upper lung lobe mass. Gallium scintigraphy showed uptake in the abdominal mass. Epstein-Barr virus-related antibody was not detected in the patient's serum sample. We performed extirpation of the jejunum and ileum tumors. The pathologic findings showed that these 2 tumors were NK/T-cell lymphoma. After the operation, the lung mass rapidly enlarged, and right upper lobectomy was performed. The right upper lung lobe tumor showed the same histopathologic findings as the small bowel tumor. The final histologic diagnosis was established as multiple extranodal NK/T cell type PTLD of the small bowel and right upper lung lobe. CONCLUSIONS After reduction of the immunosuppressive agent, no recurrence of PTLD has been observed for the past 9 years.
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Affiliation(s)
- M Matsumura
- Division of Surgery, Hachinohe City Hospital, Japan.
| | - Y Mizuno
- Division of Surgery, Hachinohe City Hospital, Japan
| | - M Okamoto
- Division of Surgery, Hachinohe City Hospital, Japan
| | - N Sawa
- Division of Surgery, Hachinohe City Hospital, Japan
| | - Y Katayama
- Division of Pathology, Hachinohe City Hospital, Japan
| | - N Shimoyama
- Division of Pathology, Hakodate Municipal Hospital, Japan
| | - N Kawagishi
- Division of Advanced Surgical Science and Technology, Graduate School of Medicine, Tohoku University, Miyagi, Japan
| | - K Miura
- Division of Surgery, Hachinohe City Hospital, Japan
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Matsukura K, Shiba T, Sasaki T, Yoshida K, Matsumura M. Dynamics of Neotyphodium uncinatum
and N
-formylloline in Italian ryegrass, and their relation to insect resistance in the field. J Appl Microbiol 2013; 116:400-7. [DOI: 10.1111/jam.12374] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 10/15/2013] [Accepted: 10/21/2013] [Indexed: 11/30/2022]
Affiliation(s)
- K. Matsukura
- Agro-Environment Research Division; NARO Kyushu Okinawa Agricultural Research Center; Koshi Kumamoto Japan
| | - T. Shiba
- Plant Protection Division; NARO Agricultural Research Center; Tsukuba Ibaraki Japan
| | - T. Sasaki
- Forage Grass Laboratory; Forage Crop Research Institute; Japan Grassland Agriculture & Forage Seed Association; Nasushiobara Tochigi Japan
| | - K. Yoshida
- Agro-Environment Research Division; NARO Kyushu Okinawa Agricultural Research Center; Koshi Kumamoto Japan
| | - M. Matsumura
- Agro-Environment Research Division; NARO Kyushu Okinawa Agricultural Research Center; Koshi Kumamoto Japan
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21
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Abstract
Disuse atrophy of swallowing-related organs due to an excessive decrease in swallowing frequency is suspected to occur in patients with poor oral intake, especially elderly people. However, swallowing frequency in daily life has not previously been examined in the elderly. This study examined swallowing frequency in elderly people and compared these findings to those in a younger population and differences in the degree of activity in daily life. (i) We compared swallowing frequency in 20 elderly people (82·0 ± 8·3 year) and 15 healthy young people (26·5 ± 3·5 year). (ii) 20 elderly people were divided into two groups according to the degree of activity in daily life: a semi-bedridden group and bedridden group; the swallowing frequency was compared between these groups. (i) The swallowing frequency in the elderly people was 2-19 times per hour and the mean was 9·4 ± 4·9, and that in the healthy young people was 16-76 times per hour and the mean was 40·7 ± 19·5. Swallowing frequency in elderly people was significantly lower than that in young healthy people (P < 0·0001). (ii) The swallowing frequency in bedridden group was 2-11 times per hour and the mean was 6·8 ± 3·3, and that in semi-bedridden group was 3-19 times per hour and the mean was 11·9 ± 5·1. Swallowing frequency in bedridden group was significantly lower than that in semi-bedridden group (P < 0·05). These results indicate that in daily life, elderly people tend to swallow less frequently than young people. In addition, swallowing frequency was lower in elderly subjects with a low degree of activity in daily life.
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Affiliation(s)
- N Tanaka
- Division of Oral and Facial Disorders, Osaka University Dental Hospital, Suita, Japan; Division of Dentistry, Shitennoji - Yawaragien Medical Center for Children with Mental and Physical Disability, Tondabayashi, Japan
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22
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Mizushima I, Inoue D, Yamada K, Saeki T, Ubara Y, Suzuki Y, Fujii H, Matsumura M, Yamagishi M, Notohara K, Kawano M. THU0460 Clinical Characteristics and the Course after Corticosteroid Therapy in IgG4-Related Aortitis/Periaortitis and Periarteritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.988] [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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23
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Haque MM, Khan A, Umar K, Mir NA, Muneer M, Harada T, Matsumura M. Synthesis, Characterization and Photocatalytic Activity of Visible Light Induced Ni-Doped TiO 2. ACTA ACUST UNITED AC 2013. [DOI: 10.1166/eef.2013.1029] [Citation(s) in RCA: 15] [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: 11/23/2022]
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Tsutsui T, Tanaka Y, Ushimura A, Ide T, Matsumura M, Barrett JC. In vitro cytotoxicity of diverse preparations used in dental practice to human gingival keratinocytes. Toxicol In Vitro 2012; 11:393-8. [PMID: 20654326 DOI: 10.1016/s0887-2333(97)00030-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/1997] [Indexed: 11/16/2022]
Abstract
The cytotoxicities of diverse preparations used for dental practice were examined with normal human keratinocytes from gingival tissues by the uptake of neutral red (NR assay). Cultures from different individuals were established, and secondary cultures in serum-free medium were used. The cytotoxicities to cells treated for 2 days with gargles, mouthwashes, gingival massages, fluoride preparations, dentifrices and local anaesthetics were determined from the dose-response curves of inhibition of NR uptake. As a quantitative measure of cytotoxicity, NR(50) (the concentration of the preparations that resulted in a 50% decrease in NR uptake relative to untreated controls) was interpolated from dose-response curves. Dentifrices examined showed cytotoxicity similar to gingival massages but were more cytotoxic than any fluoride preparations, local anaesthetics, and most gargles and mouthwashes. The cytotoxicities of dentifrices were at least 6.5-fold those of fluoride preparations and 7.9-fold those of local anaesthetics. The results provide useful estimates of relative toxicities of dental preparations to human oral mucosa and are useful as a standard for cytotoxic assessment of newly developed preparations for dental use.
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Affiliation(s)
- T Tsutsui
- Laboratory of Molecular Carcinogenesis, Environmental Carcinogenesis Program, National Institute of Environmental Health Sciences, National Institutes of Health, PO Box 12233, Research Triangle Park, NC 27709, USA
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Isoda H, Shinmoto H, Matsumura M, Nakahara T. The neurite-initiating effect of microbial extracellular glycolipids in PC12 cells. Cytotechnology 2012; 31:165-72. [PMID: 19003137 DOI: 10.1023/a:1008020121693] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The effects of several kinds of microbial extracellular glycolipids on neurite initiation in PC12 cells were examined. Addition of mannosylerythritol lipid-A (MEL-A), MEL-B, and sophorose lipid (SL) to PC12 cells caused significant neurite outgrowth. Other glycolipids, such as polyol lipid (PL), rhamnose lipid (RL), succinoyl trehalose lipid-A (STL-A) and STL-B caused no neurite-initiation. MEL-A increased acetylcholine esterase (AChE) activity to an extent similar to nerve growth factor (NGF). However, MEL-A induced one or two long neurites from the cell body, while NGF induced many neurites. In addition, MEL-A-induced differentiation was transient, and after 48 h, percentage of cells with neurites started to decrease in contrast to neurons induced by NGF, which occurred in a time-dependent manner. MEL-A could induce neurite outgrowth after treatment of PC12 cells with an anti-NGF receptor antibody that obstructed NGF action. These results indicate that MEL-A and NGF induce differentiation of PC12 cells through different mechanisms.
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Abstract
In vitro preparation of DNA/anti-DNA immune complex using monoclonal antibody and low molecular weight homogeneous DNA was described and the characteristics of the immune complex were identified. The immune complex was formed by the monoclonal antibody with DNA effectively at high ratios of antibody/DNA. The activation and binding ability of the immune complex to the complement was considerably high, whereas the capacity to bind red blood cells via C3b complement component receptor was shown relatively low. The assay of sucrose density gradient ultracentrifugation indicated that the sedimentation coefficient of the immune complex was between 10S and 23S. Studies of organ distribution and uptake of IC demonstrated a particular affinity to the kidney tissue. The significance of these results with respect to the latent pathogenicity of the immune complex was discussed.
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Horiuchi K, Tsurushima H, Soo Kim B, Qin Liu S, Saijo K, Saijo Y, Nukiwa T, Nomura N, Matsumura M, Ohno T. Expansion of human autologous cytotoxic T lymphocytes on fixed target tumor cells. Cytotechnology 2012; 26:119-24. [PMID: 22358549 DOI: 10.1023/a:1007903614475] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Human tumor specific cytotoxic T lymphocytes (CTL) were expanded on formalin-fixed autologous target tumor cells derived from glioblastoma multiforme. Growth response of the CTL restimulated with the fixed target cells was larger than those with live target cells. The results suggest that formalin-fixed tumor cells will be stable sources of tumor antigen for efficient autologous CTL expansion and be useful for adoptive immunotherapy of tumors.
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Affiliation(s)
- K Horiuchi
- RIKEN Cell Bank, The Institute of Physical and Chemical Research (RIKEN) Institute of Applied Biochemistry, Japan
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Abstract
The diffusion characteristics of several substrates of varying molecular sizes into and from Ca-alginate gel beads in well-stirred solutions were investigated. The values of the diffusion coefficient (D) of substrates such as glucose, L-tryptophan, and alpha-lactoalbumin [with molecular weight (MW) less than 2 x 10(4)] into and from the gel beads agreed with those in the water system. Their substrates could diffuse freely into and from the gel beads without disturbance by the pores in the gel beads. The diffusion of their substrates into and from the gel beads was also not disturbed by increasing the Ca-alginate concentration in the beads and the CaCl(2) concentration used in the gel preparation. In the case of higher molecular weight substances such as albumin (MW = 6.9 x 10(4)), gamma-globulin (MW = 1.54 x 10(5)) and fibrinogen (MW = 3.41 x 10(5)), the diffusion behaviors of the substrates into and from the gel beads were very different. No diffusion of their substrates into the gel beads from solutions was observed, and only albumin was partly absorbed on the surface of the gel beads. The values of D of their substrates from the gel beads into their solutions were smaller than their values in the water system, but all their substrates could diffuse from the gel beads. The diffusion of high molecular weight substrates was limited more strongly by the increase of Ca-alginate concentration in the gel beads than by the increase of the CaCl(2) concentration used in the gel preparation. Using these results, the capacity of Ca-alginate gel as a matrix of immobilization was discussed.
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Affiliation(s)
- H Tanaka
- Institute of Applied Biochemistry, The University of Tsukuba, Ibaraki, Japan
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Tanaka N, Nohara K, Okuno K, Kotani Y, Okazaki H, Matsumura M, Sakai T. Development of a swallowing frequency meter using a laryngeal microphone. J Oral Rehabil 2012; 39:411-20. [PMID: 22489845 DOI: 10.1111/j.1365-2842.2012.02293.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Disuse atrophy of swallowing-related organs is suspected when decreased swallowing frequency is seen in the elderly. However, swallowing frequency has not been examined in elderly people during daily life. We developed a swallowing frequency meter containing a laryngeal microphone that does not restrict the subject's ability to perform daily activities. In this study, the utility of the meter was assessed. Experiment 1: The ability of the meter to detect swallowing was examined. The subject was instructed to swallow saliva or foods at a voluntarily pace. During these procedures, swallowing events were simultaneously recorded by the meter, self-enumeration and videofluorography. As a result, all of the swallowing events identified by the meter coincided with the swallowing events identified by self-enumeration and videofluorography. Experiment 2: Swallowing sounds display various patterns both between and within individuals. Therefore, we examined the concordance rate between the number of swallowing events counted by the meter and that counted by self-enumeration in 15 subjects over a longer period than in experiment 1. The concordance rates calculated by two examiners between the meter and self-enumeration were 96·8 ± 4·5% and 98·9 ± 3·3% at rest and 95·2 ± 4·5% and 96·1 ± 4·1% during meals, respectively. Our findings indicate that this meter is useful for measuring the frequency of swallowing during daily situations.
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Affiliation(s)
- N Tanaka
- Division of Oral and Facial Disorders, Osaka University Dental Hospital, Osaka, Japan
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Abstract
ABSTRACTLow-K silica films were grown from the liquid phase using methyl-triethoxy-silane. Physical and chemical properties were investigated together with electronic properties. The film had dense methyl groups and showed insulating characteristics even under as-grown conditions. The dielectric constant, low-field resistivity and breakdown field-strength were 3.6, 1013 Ωcm and IMV/cm, respectively, for the as-grown film. They were improved to 2.6, more than 1015 Ωcm and more than 3MV/cm, respectively, after 300°C vacuum annealing
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Endo T, Kawasaki H, Mouri T, Ishigure Y, Shimomura H, Matsumura M, Koketsu K. Five-Fingered Haptic Interface Robot: HIRO III. IEEE Trans Haptics 2011; 4:14-27. [PMID: 26962952 DOI: 10.1109/toh.2010.62] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This paper presents the design and characteristics of a five-fingered haptic interface robot named HIRO III. The aim of the development of HIRO III is to provide a high-precision three-directional force at the five human fingertips. HIRO III consists of a 15-degrees-of-freedom (DOF) haptic hand, a 6-DOF interface arm, and a control system. The haptic interface, which consists of a robot arm and hand, can be used in a large workspace and can provide multipoint contact between the user and a virtual environment. However, the following problems peculiar to a multi-DOF robot have arisen: a large amount of friction, a backlash, and the presence of many wires for many motors and sensors. To solve these problems, a new mechanism and a wire-saving control system have been designed and developed. Furthermore, several experiments have been carried out to investigate the performance of HIRO III. These results show the high-precision force display and great potential of HIRO III.
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Abstract
Narcolepsy is a chronic sleep disorder, characterized by excessive daytime sleepiness (EDS), cataplexy, sleep paralysis and hypnagogic hallucinations. Both sporadic (95%) and familial (5%) forms of narcolepsy exist in humans. The major pathophysiology of human narcolepsy has been recently discovered based on the discovery of narcolepsy genes in animals; the genes involved in the pathology of the hypocretin/orexin ligand and its receptor. Mutations in hypocretin-related genes are rare in humans, but hypocretin ligand deficiency is found in a large majority of narcolepsy with cataplexy. Hypocretin ligand deficiency in human narcolepsy is probably due to the post-natal cell death of hypocretin neurones. Although a close association between human leucocyte antigen (HLA) and human narcolepsy with cataplexy suggests an involvement of autoimmune mechanisms, this has not yet been proved. Hypocretin deficiency is also found in symptomatic cases of narcolepsy and EDS with various neurological conditions, including immune-mediated neurological disorders, such as Guillain-Barre syndrome, MA2-positive paraneoplastic syndrome and neuromyelitis optica (NMO)-related disorder. The findings in symptomatic narcoleptic cases may have significant clinical relevance to the understanding of the mechanisms of hypocretin cell death and choice of treatment option. The discoveries in human cases lead to the establishment of the new diagnostic test of narcolepsy (i.e. low cerebrospinal fluid hypocretin-1 levels for 'narcolepsy with cataplexy' and 'narcolepsy due to medical condition'). As a large majority of human narcolepsy patients are ligand deficient, hypocretin replacement therapy may be a promising new therapeutic option, and animal experiments using gene therapy and cell transplantations are in progress.
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Affiliation(s)
- S Nishino
- Stanford University, Sleep and Circadian Neurobiology Laboratory, Palo Alto, CA 94304-5489, USA.
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Matsumura M, Iyenori T, Tanaka Y, Han D, Nose M, Utsugi M, Oshiman N, Shinagawa H, Odagi Y, Tabata Y. Acoustic Resonance between Ground and Thermosphere. Data Sci J 2009. [DOI: 10.2481/dsj.8.s68] [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: 11/20/2022] Open
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Nishikawa M, Matsunaga H, Takahashi K, Matsumura M. Indocyanine green angiography in experimental choroidal circulatory disturbance. Ophthalmic Res 2008; 41:53-8. [PMID: 18971589 DOI: 10.1159/000165916] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Accepted: 09/04/2007] [Indexed: 11/19/2022]
Abstract
PURPOSE To determine how choroidal venous congestion alters the indocyanine green angiograms (ICGA) of monkeys. METHODS Two vortex veins in each eye of 5 Japanese macaque monkeys were sutured and cauterized at their exit. ICGA and fluorescein angiography (FA) were performed immediately after the occlusions. The FA and ICGA findings were correlated with the histopathological changes. RESULTS ICGA showed a delay in filling the choroidal arteries in the field of the occluded vortex veins, and the choroidal veins were filled retrogradely in a pulsatile manner. The fluorescence intensity of the larger veins was higher in the occluded area. The clearance of the indocyanine green dye was delayed by approximately 15 min. Histology showed that the choroidal veins in the occluded field were engorged with red blood cells. CONCLUSION The ICGA findings in eyes with choroidal venous congestion are a delay in the filling of the choroidal arteries, reflux of venous blood flow, increase in fluorescence intensity of the choroidal veins, and delayed indocyanine green dye clearance.
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Affiliation(s)
- M Nishikawa
- Department of Ophthalmology, Kansai Medical University, Hirakata, Osaka, Japan.
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Koike-Kiriyama N, Adachi Y, Iwasaki M, Amou Y, Shigematsu A, Koike Y, Minamino K, Mukaide H, Shi M, Yanai S, Matsumura M, Ikehara S. High mortality rate of (NZW x BXSB)F1 mice induced by administration of lipopolysaccharide attributes to high production of tumour necrosis factor-alpha by increased numbers of dendritic cells. Clin Exp Immunol 2008; 154:285-93. [PMID: 18782326 DOI: 10.1111/j.1365-2249.2008.03759.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
(NZW x BXSB)F1 mice (W/BF1 mice) have been reported to be a type of autoimmune-prone mice, showing symptoms of proteinuria, anti-DNA antibodies and anti-platelet antibodies. In this paper, we report that W/BF1 mice show hyperproduction of tumour necrosis factor (TNF)-alpha, responding to lipopolysaccharide (LPS) in comparison with normal mice, resulting in induction of death. In normal mice, monocytes/macrophages (Mo/MØ) are the main producer of TNF-alpha, while both Mo/MØ and dendritic cells (DCs) produce TNF-alpha in W/BF1 mice. Because the number of DCs is higher in W/BF1 mice, the main producers of TNF-alpha in W/BF1 mice are thought to be DCs. Moreover, administration of anti-TNF-alpha antibodies rescued the W/BF1 mice from death induced by LPS, suggesting that TNF-alpha is crucial for the effect of LPS. Although there is no significant difference in the expression of Toll-like receptor-4 (TLR-4) on DCs between B6 and W/BF1 mice, nuclear factor kappa b activity of DCs from W/BF1 mice is augmented under stimulation of LPS in comparison with that of normal mice. These results suggest that the signal transduction from TLR-4 is augmented in W/BF1 mice in comparison with normal mice, resulting in the hyperproduction of TNF-alpha and reduced survival rate. The results also suggest that not only the quantity of endotoxin, but also the host conditions, the facility to translate signal from TLR, and so on, could reflect the degree of bacterial infections and prognosis.
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Affiliation(s)
- N Koike-Kiriyama
- First Department of Pathology, Kansai Medical University, Moriguchi City, Osaka, Japan
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Miyahara I, Matsumura M, Goto M, Omi R, Hirotsu K, Mizuguchi H, Hayashi H. Structural study of putative aminotransferase from Thermus thermophilusHB8. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308091034] [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: 11/10/2022] Open
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Lucas JM, True L, Hawley S, Matsumura M, Morrissey C, Vessella R, Nelson PS. The androgen-regulated type II serine protease TMPRSS2 is differentially expressed and mislocalized in prostate adenocarcinoma. J Pathol 2008; 215:118-25. [PMID: 18338334 DOI: 10.1002/path.2330] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Transmembrane serine protease 2 (TMPRSS2) is an androgen-regulated member of the type two transmembrane protease (TTSP) family. Two other members of the TTSP family, matriptase and hepsin, are over-expressed in prostate adenocarcinoma and mechanistically influence cancer cell invasion and metastasis. This study was performed to determine TMPRSS2 protein expression in primary and metastatic prostate cancers. We developed a monoclonal antibody capable of the sensitive and specific detection of TMPRSS2 protein. TMPRSS2 regulation by androgen and presence in seminal fluid was measured. TMPRSS2 localization and expression was evaluated in 415 cases of primary prostate cancer and 144 prostate cancer metastases by immunohistochemistry. We determined that TMPRSS2 protein expression is regulated by androgens and that TMPRSS2 is a component of the normal seminal fluid proteome. TMPRSS2 protein is abundantly expressed in the prostate, with low levels in the epithelia of the colon, stomach, epididymis and breast. Pancreatic acini, hepatic bile ducts, testicular Leydig cells and the kidney also express TMPRSS2. In the prostate, TMPRSS2 protein is specifically localized to the secretory epithelium, with enhanced expression in the plasma membrane orientated towards the ductal lumen. TMPRSS2 expression was significantly higher in both neoplastic prostate and in the epithelium of prostatic hyperplasia compared to normal epithelium (p < 0.01). TMPRSS2 expression was further elevated in higher Gleason grade cancers (patterns 4 and 5) compared to pattern 3 (p = 0.04). Furthermore, in most high-grade cancers, TMPRSS2 was mislocalized, being expressed in the cytoplasm as well as in the cell membrane. Prostate cancer metastases also generally expressed high levels of TMPRSS2. In summary, the TMPRSS2 protease is expressed highly in primary and metastatic prostate cancers and is associated with tumour cell differentiation. Based on studies with the related proteins matriptase and hepsin, TMPRSS2 should be investigated for causal roles in prostate carcinogenesis.
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Affiliation(s)
- J M Lucas
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
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Yamada K, Kawano M, Inoue R, Hamano R, Kakuchi Y, Fujii H, Matsumura M, Zen Y, Takahira M, Yachie A, Yamagishi M. Clonal relationship between infiltrating immunoglobulin G4 (IgG4)-positive plasma cells in lacrimal glands and circulating IgG4-positive lymphocytes in Mikulicz's disease. Clin Exp Immunol 2008; 152:432-9. [PMID: 18422733 DOI: 10.1111/j.1365-2249.2008.03651.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Mikulicz's disease (MD) is gaining acceptance as an immunoglobulin G4 (IgG4)-related disease characterized by bilateral lacrimal and salivary gland swelling. The aetiology of MD and other IgG4-related diseases is still unclear. The present work was performed to study the clonality of infiltrating IgG4-positive plasma cells in lacrimal glands and circulating peripheral blood cells in patients with MD, and compare the clonal relationship between infiltrating and circulating IgG4 positive cells. Total cellular RNA was extracted from the lacrimal glands and peripheral blood in five MD patients. Reverse transcription polymerase chain reaction was performed with primers specific for activation-induced cytidine deaminase (AID) and for Ig VH and IgG4. Sequences of Ig VH were compared with the structure of Ig VH of the lacrimal glands and the peripheral blood cells. AID was expressed to varying degrees in lacrimal glands of all MD patients. Most IgG4-positive cells infiltrating lacrimal glands and in peripheral blood were polyclonal, although several clonally related pairs were detected. In one patient, two of the circulating IgG4 VH4-59 clones shared identical CDR3 sequences with the clones within the lacrimal glands. In conclusion, while most tissue-infiltrating and circulating IgG4-positive cells in MD are polyclonal, some clonally related IgG4 positive cells exist between lacrimal gland and peripheral blood, accounting for the clinical features of MD as an IgG4-related disease involving multiple organs.
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Affiliation(s)
- K Yamada
- Division of Rheumatology, Department of Internal Medicine, Kanazawa University Graduate School of Medicine, Kanazawa, Japan
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Onishi T, Umemura S, Yanagawa M, Matsumura M, Sasaki Y, Ogasawara T, Ooshima T. Remineralization effects of gum arabic on caries-like enamel lesions. Arch Oral Biol 2008; 53:257-60. [DOI: 10.1016/j.archoralbio.2007.10.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Revised: 10/04/2007] [Accepted: 10/12/2007] [Indexed: 10/22/2022]
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Uehara K, Yamanaka K, Iwakura A, Ueyama K, Matsumura M, Yoshimura S, Sugita T, Nishimura K. [An infant case of a rupture of chordae tendineae; report of a case]. Kyobu Geka 2007; 60:1185-1187. [PMID: 18078087] [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] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report a case of 5-month-old boy with severe mitral regurgitation due to a rupture of chordae tendinae. Cardiac echography showed a prolapse of the anterior cusp of the mitral valve. He was progressively deteriorated despite maximal medical treatment, and a surgical intervention was performed 15 hours after the onset. The operative finding was a rupture of chordae tendinae attached to the anterior cusp of the mitral valve. The infant underwent mitral valve plasty using artificial chordae together with partial annulo-plasty. A rupture of chordae tendineae is extremely rare in infants, and its cause is yet unknown. Chordal reconstruction is feasible even at this early stage of life, although the long-term follow-up is mandatory.
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Affiliation(s)
- K Uehara
- Department of Cardiovascular Surgey, Tenri Hospital, Tenri, Japan
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Watanabe R, Munemasa T, Matsumura M, Fujimaki M. Fluorescent liposomes for intravital staining of Kupffer cells to aid in vivo microscopy in rats. ACTA ACUST UNITED AC 2007; 29:321-7. [PMID: 17805433 DOI: 10.1358/mf.2007.29.5.1117556] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The potential of newly formulated fluorescent-labeled liposomes for the intravital staining of Kupffer cells was evaluated in rats. Fluorescently labeled phosphatidylcholine (PC) was incorporated into liposomes consisting of PC and phosphatidylserine. After intravenous injection, Kupffer cells in the rat liver were intravitally stained and were clearly delineated under the fluorescence image of both confocal laser scanning microscopy and in vivo microscopy. Specificity of the staining was confirmed by immunohistochemistry using the anti-rat macrophage antibody Ki-M2R, which suggested that the liposomes were selectively entrapped by the hepatic reticuloendothelial system. A time-course study revealed that the suitable observation window was between 16 and 24 h after the injection. Phagocytic activity of Kupffer cells after the administration of liposomes was examined by measuring the amount of hepatic uptake of intravenously administered fluorescent microspheres; no detrimental influence of the liposomes on the phagocytic activity was observed. Additionally, no histopathologic changes were found in the livers from liposome-treated rats. Therefore, the fluorescent-labeled liposomes appear to be a useful research tool for labeling Kupffer cells for in vivo microscopic observation of the liver.
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Affiliation(s)
- R Watanabe
- New Product Research Laboratories II, Daiichi Pharmaceutical Co., Ltd., Edogawa-Ku, Tokyo, Japan.
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Koike-Kiriyama N, Koike Y, Adachi Y, Mukaide H, Minamino K, Shigematsu A, Kamiama Y, Matsumura M, Ikehara S. Intra-bone marrow injection of dendritic cells for treatment of malignant tumor in mice. J Exp Clin Cancer Res 2007; 26:337-342. [PMID: 17987792] [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] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
It has recently been reported that antigen presentation from dendritic cells (DCs) to T cells occurs in the bone marrow, and that not only tumor antigen-pulsed DCs but also unpulsed DCs have some anti-tumor effects, resulting from the induction of anti-tumor immunity. In this paper, we examined whether dendritic cells induced from bone marrow cells (BMCs) have the capacity to suppress tumor growth and, if so, which route (intravenous, subcutaneous, or intra-bone marrow injection) is best. BALB/c mice that had been subcutaneously inoculated with Meth A (a murine fibrosarcoma cell line) were injected with BMC-derived DCs via the above three routes. We also examined the tumor suppressive effects of DCs from tumor-bearing mice. Although IBM injection showed similar effects to subcutaneous injection on the suppression of tumor growth, intravenous injection was less effective. It seems likely that the IBM injection of DCs activates tumor-specific T cells, resulting in the suppression of the tumor growth. DCs derived from tumor-bearing mice had some effects on the suppression of tumor growth but they were less effective than DCs from untreated mice.
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Affiliation(s)
- N Koike-Kiriyama
- First Department of Pathology, Kansai Medical University, Moriguchi City, Osaka, Japan
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Nemoto S, Yoshimura S, Matsumura M, Nishimura K. [An initial experience of endotherine-1 dual-receptor blockade in the treatment of sustained pulmonary hypertension early after congenital cardiac surgery in infancy]. Kyobu Geka 2007; 60:453-6. [PMID: 17564060] [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] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We report an initial experience of successful application of bosentan (BOS), a endotheline-1 dual-receptor blocker, in the treatment of sustained pulmonary hypertension (PH) early after surgical correction of congenital heart disease. Two infants (5 and 9-months-old girls undergone repair of complete atrioventricular septal defect and closure of ventricular septal defect, respectively) suffered from PH-relating symptoms after extubation despite oral sildenafil (SIL) treatment. After administration of BOS (1.5 mg/kg/day), the symptoms were dramatically relieved and SIL was uneventfully discontinued. Although BOS caused a transient increment of liver transaminase in the 5-month-old girl, BOS is a possible alternate in the treatment of the postoperative sustained PH as reported in a various type of chronic PH.
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Affiliation(s)
- Shintaro Nemoto
- Department of Cardiovascular Surgery, Tenri Yorozu Soudansyo Hospital, Tenri, Japan
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Abstract
AIM To demonstrate the influence of copper on luminescence and toxin production in Vibrio harveyi. METHODS AND RESULTS The effect of copper concentration on the expression of both luminescence and toxin of V. harveyi was investigated. Copper concentration of less than 40 ppm had no effect on the growth. While V. harveyi cultured with 40 ppm copper concentration showed decreased luminescence as measured by spectrofluorophotometer and as observed. LuxD gene, which is related to luminescence expression, was monitored using real-time RT-PCR. Result showed that the concentration of cDNA coding for luxD was lower in V. harveyi with copper. Toxic activity against both HeLa cells and shrimp haemocytes was also lower in the culture supernatant of V. harveyi grown with 40 ppm copper concentration. Moreover, V. harveyi extracellular proteins were analysed using SDS-PAGE. Results showed that culture supernatant from V. harveyi grown without copper had thicker band indicating a higher concentration of the putative cysteine protease, one of the major toxin of V. harveyi. CONCLUSIONS This study proved that both luminescence and toxin were repressed by copper. SIGNIFICANCE AND IMPACT OF THE STUDY The current study demonstrated that copper inhibited expression of phenotype of V. harveyi. Furthermore, it may inhibit quorum sensing of V. harveyi.
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Affiliation(s)
- T Nakayama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Tatsumi K, Uedo N, Ishihara R, Iishi H, Matsumura M, Ishiguro S. Flat gastric epithelial neoplasm detected by endoscopic screening with autofluorescence imaging video endoscopy. Endoscopy 2007; 39 Suppl 1:E289. [PMID: 17957613 DOI: 10.1055/s-2007-966727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- K Tatsumi
- Department of Gastrointestinal Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
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Gui P, Inamori R, Matsumura M, Inamori Y. Evaluation of constructed wetlands by wastewater purification ability and greenhouse gas emissions. Water Sci Technol 2007; 56:49-55. [PMID: 17802837 DOI: 10.2166/wst.2007.517] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Domestic wastewater is a significant source of nitrogen and phosphorus, which cause lake eutrophication. Among the wastewater treatment technologies, constructed wetlands are a promising low-cost means of treating point and diffuse sources of domestic wastewater in rural areas. However, the sustainable operation of constructed wetland treatment systems depends upon a high rate conversion of organic and nitrogenous loading into their metabolic gaseous end products, such as N2O and CH4. In this study, we examined and compared the performance of three typical types of constructed wetlands: Free Water Surface (FWS), Subsurface Flow (SF) and Vertical Flow (VF) wetlands. Pollutant removal efficiency and N2O and CH4 emissions were assessed as measures of performance. We found that the pollutant removal rates and gas emissions measured in the wetlands exhibited clear seasonal changes, and these changes were closely associated with plant growth. VF wetlands exhibited stable removal of organic pollutants and NH3-N throughout the experiment regardless of season and showed great potential for CH4 adsorption. SF wetlands showed preferable T-N removal performance and a lower risk of greenhouse gas emissions than FWS wetlands. Soil oxidation reduction potential (ORP) analysis revealed that water flow structure and plant growth influenced constructed wetland oxygen transfer, and these variations resulted in seasonal changes of ORP distribution inside wetlands that were accompanied by fluctuations in pollutant removal and greenhouse gas emissions.
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Affiliation(s)
- P Gui
- National Institute for Environmental Studies, 305-8506, Onogawa 16-2, Tsukuba, Japan.
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Nakagawa G, Ebie Y, Tsuneda S, Matsumura M, Inamori Y. Use of real-time PCR to examine the relationship between ammonia oxidizing bacterial populations and nitrogen removal efficiency in a small decentralized treatment system 'Johkasou'. Water Sci Technol 2007; 55:203-10. [PMID: 17506439 DOI: 10.2166/wst.2007.146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The aim of this study was to examine the relationship between ammonia oxidizing bacterial populations and biological nitrogen removal in a small on-site domestic wastewater treatment system "Johkasou". The population dynamics of ammonia oxidizing bacteria (AOB) in six full-scale advanced Johkasous was surveyed using real-time PCR assay over a period of one year. These Johkasous were selected to compare the AOB populations in different treatment performance. When the effluent NH4-N concentration was higher than 2 mg L(-1), it was difficult to meet the effluent standard of advanced Johkasous (T-N 10 mg L(-1)). In contrast, the nitrogen removal efficiency was hardly affected by nitrite oxidation and denitrification in these systems. In other words, ammonia oxidation was a rate-limiting step. Furthermore, we focused on the relationship between NH4-N loading per AOB cell and nitrogen removal. Real time PCR monitoring results demonstrated that it is important to regulate NH4-N loading per AOB cell below 210 pg cell(-1) day(-1) to meet the effluent standard of advanced Johkasou. It is considered that NH4-N loading per AOB cell is a useful parameter for determining suitable nitrogen loading and small decentralized system design.
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Affiliation(s)
- G Nakagawa
- Graduate school of Life and environmental science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan.
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Ogura M, Yamaji Y, Hikiba Y, Maeda S, Matsumura M, Okano K, Sassa R, Yoshida H, Kawabe T, Omata M. Gastric cancer among peptic ulcer patients: retrospective, long-term follow-up. Dig Liver Dis 2006; 38:811-4. [PMID: 16920046 DOI: 10.1016/j.dld.2006.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2006] [Revised: 05/30/2006] [Accepted: 07/03/2006] [Indexed: 12/11/2022]
Abstract
BACKGROUND Patients with duodenal ulcer are not at high risk although Helicobacter pylori infection is no doubt associated with gastric cancer development. However, little is known about the risk after long-term follow-up. AIMS We investigated the incidence for gastric cancer development in peptic ulcer patients in a long term. PATIENTS AND METHODS Between 1965 and 2004, endoscopic follow-up of more than 1 year was conducted on 1504 peptic ulcer patients in our hospital. They consisted of 978 gastric ulcer patients, 444 duodenal ulcer patients and 82 gastric and duodenal ulcer patients. Gastric and duodenal ulcer patients were excluded from the analysis because of their limited number. RESULTS Gastric cancers developed in 32 (3.3%) of gastric ulcer patients and 3 (0.68%) of duodenal ulcer patients. Kaplan-Meier analysis showed that the incidence of gastric cancer in duodenal ulcer patients was significantly lower than that in gastric ulcer patients (log-rank test, p=0.0059). Cox's proportional hazard model denoted the relative risk for duodenal ulcer against gastric ulcer adjusted by sex and age as 0.23 (95% CI: 0.072-0.77, p=0.016). CONCLUSION The risk for patients with duodenal ulcer to develop gastric cancer over the long term is significantly less than in those with gastric ulcer.
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Affiliation(s)
- M Ogura
- Division of Gastroenterology, Institute for Adult Diseases, Asahi Life Foundation, 1-6-1 Marunouchi, Tokyo 100-0005, Japan.
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Abstract
AIMS To demonstrate that Vibrio harveyi produces various types of toxins and how the production of those toxins is related with luminescence. METHODS AND RESULTS Luminescence and toxicity of eight V. harveyi were evaluated. We demonstrated that all V. harveyi emitting luminescence were isolated from marine organisms and also showed that they were highly pathogenic when compared with culture collection V. harveyi based on cytotoxic assay test. On the contrary, V. harveyi isolated from shrimp farm showed no luminescence but showed high pathogenicity based on toxicity test. The effect of protease inhibitors on pathogenicity and luminescence was also investigated. We demonstrated that light emission of pathogenic V. harveyi remarkably decreased after addition of protease inhibitor. Furthermore, extracellular proteins from cell-free culture supernatant of luminescent and nonluminescent V. harveyi were compared using SDS-PAGE analysis. Results showed that there were differences in molecular weight and amount of proteins. CONCLUSIONS Vibrio harveyi parasiting marine organisms have both luminescence and pathogenicity. Based on this study, luminescence and protease toxin activity in V. harveyi are related. Moreover, this paper clarified that V. harveyi produces various types of toxins. SIGNIFICANCE AND IMPACT OF THE STUDY The current study demonstrated that V. harveyi produces two kinds of toxins, haemolysin and protease toxin. It may be clear roots of V. harveyi toxin.
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Affiliation(s)
- T Nakayama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Sakaguchi Y, Iwasaki Y, Okimi H, Fukuno K, Asahi M, Matsumura M. Magnetic field effect and RYDMR on the emission of an organic electroluminescent material, Alq3. Mol Phys 2006. [DOI: 10.1080/00268970600564828] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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