1
|
Mizuta K, Koga F, Kawazoe Y, Murayama K, Nakashita S, Oza N. [A case of liver abscess with meningitis and endophthalmitis: invasive liver abscess syndrome]. Nihon Shokakibyo Gakkai Zasshi 2024; 121:237-244. [PMID: 38462472 DOI: 10.11405/nisshoshi.121.237] [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: 03/12/2024]
Abstract
A woman in her 70s was hospitalized and was diagnosed with liver abscess and managed with antibiotics in a previous hospital. However, she experienced altered consciousness and neck stiffness during treatment. She was then referred to our hospital. On investigation, we found that she had meningitis and right endophthalmitis concurrent with a liver abscess. Klebsiella pneumoniae was detected from both cultures of the liver abscess and effusion from the cornea. A string test showed a positive result. Therefore, she was diagnosed with invasive liver abscess syndrome. Although she recovered from the liver abscess and meningitis through empiric antibiotic treatment, her right eye required ophthalmectomy. In cases where a liver abscess presents with extrahepatic complications, such as meningitis and endophthalmitis, the possibility of invasive liver abscess syndrome should be considered, which is caused by a hypervirulent K. pneumoniae.
Collapse
Affiliation(s)
- Kazuya Mizuta
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan
- Department of Diagnostic and Generalist Medicine, Dokkyo Medical University Hospital
| | - Futa Koga
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan
| | - Yuka Kawazoe
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan
| | - Kenichiro Murayama
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan
| | - Shunya Nakashita
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan
| | - Noriko Oza
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan
| |
Collapse
|
2
|
Murayama K, Fukui T, Kushibiki S, Sakamoto K, Inouchi K, Sugino T. Effects of medium-chain fatty acids and tributyrin supplementation in milk replacers on growth performance, blood metabolites, and hormone concentrations in Holstein dairy calves. J Dairy Sci 2023:S0022-0302(23)00277-1. [PMID: 37225581 DOI: 10.3168/jds.2022-22957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 01/15/2023] [Indexed: 05/26/2023]
Abstract
This study aimed to evaluate the effects of triglycerides containing medium-chain fatty acids (MCT) and tributyrin (TB) supplementation in a milk replacer (MR) on growth performance, plasma metabolites, and hormone concentrations in dairy calves. Sixty-three Holstein heifer calves (body weight at 8 d of age, 41.1 ± 2.91 kg; mean ± SD) were randomly assigned to 1 of 4 experimental MR (28% crude protein and 18% fat): (1) containing 3.2% C8:0 and 2.8% C10:0 (in fat basis) without TB supplementation (CONT; n = 15), (2) containing 6.7% C8:0 and 6.4% C10:0 without TB supplementation (MCT; n = 16), (3) containing 3.2% C8:0 and 2.8% C10:0 with 0.6% (dry matter basis) TB supplementation (CONT+TB; n = 16), (4) containing 6.7% C8:0 and 6.4% C10:0 with 0.6% TB supplementation (MCT+TB; n = 16). The MR were offered at 600 g/d (powder basis) from 8 to 14 d, up to 1,300 g/d from 15 to 21 d, 1,400 g/d from 22 to 49 d, down to 700 g/d from 50 to 56 d, 600 g/d from 57 to 63 d, and weaned at 64 d of age. All calves were fed calf starter, chopped hay, and water ad libitum. The data were analyzed using a 2-way ANOVA via the fit model procedure of JMP Pro 16 (SAS Institute Inc.). Medium-chain fatty acid supplementation did not affect the total dry matter intake. However, calves that were fed MCT had greater feed efficiency (gain/feed) before weaning (0.74 ± 0.098 vs. 0.71 ± 0.010 kg/kg) compared with non-MCT calves. The MCT calves also had a lower incidence of diarrhea compared with non-MCT calves during 23 to 49 d of age and the weaning period (50 to 63 d of age; 9.2% vs. 18.5% and 10.5% vs. 17.2%, respectively). Calves fed with TB had a greater total dry matter intake during postweaning (3,465 vs. 3,232 g/d). Calves fed TB also had greater body weight during the weaning (90.7 ± 0.97 vs. 87.9 ± 1.01 kg) and postweaning period (116.5 ± 1.47 vs. 112.1 ± 1.50 kg) compared with that of non-TB calves. The plasma metabolites and hormone concentrations were not affected by MCT or TB. These results suggest that MCT and TB supplementation in the MR may improve the growth performance and gut health of dairy calves.
Collapse
Affiliation(s)
- K Murayama
- Dairy Technology Research Institute, National Federation of Dairy Co-operative Associations (Zen-Raku-Ren), Nishi-shirakawa, Fukushima, Japan 969-0223; Research Center for Animal Science, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan 739-8528
| | - T Fukui
- Research Center for Animal Science, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan 739-8528
| | - S Kushibiki
- Institute of Livestock and Grassland Science, NARO, Tsukuba, Ibaraki, Japan 305-0901
| | - K Sakamoto
- YP Tech Co. Ltd., Chiyoda-ku, Tokyo, Japan 100-0004
| | - K Inouchi
- Dairy Technology Research Institute, National Federation of Dairy Co-operative Associations (Zen-Raku-Ren), Nishi-shirakawa, Fukushima, Japan 969-0223
| | - T Sugino
- Research Center for Animal Science, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan 739-8528.
| |
Collapse
|
3
|
Koga F, Kawaguchi Y, Shimokawa M, Murayama K, Nakashita S, Oza N, Ureshino N, Takahashi H, Ueda Y, Nakazawa J, Komori A, Otsu S, Arima S, Fukahori M, Makiyama A, Taguchi H, Honda T, Shibuki T, Nio K, Ide Y, Mizuta T, Shirakawa T, Otsuka T, Mitsugi K. Gemcitabine plus nab-paclitaxel in older patients with metastatic pancreatic cancer: A post-hoc analysis of the real-world data of a multicenter study (the NAPOLEON study). J Geriatr Oncol 2021; 13:82-87. [PMID: 34215525 DOI: 10.1016/j.jgo.2021.06.011] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 06/18/2021] [Accepted: 06/25/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVES This study aimed to examine the efficacy and safety of gemcitabine plus nab-paclitaxel (GnP) in older patients with metastatic pancreatic cancer (MPC), especially those ≥75 years old. MATERIALS AND METHODS This study retrospectively enrolled 153 patients with MPC who received GnP as first-line chemotherapy. Patients ≥75 years old were allocated to the older group, and those <75 years old were assigned to the non-older group. We compared safety, antitumor efficacy, and survival between the two groups. In the older group, prognostic indicators of survival were also assessed. RESULTS The pretreatment characteristics of the two groups were not significantly different excluding age, history of malignancy, and C-reactive protein levels. The initial dose and relative dose intensities of GnP were significantly lower in the older group. There were no significant differences in the adverse event and antitumor response rates between the two groups. Median progression-free survival and overall survival were 5.5 and 12.0 months, respectively, in the older group, versus 6.0 and 11.1 months, respectively, in the non-older group. In the older group, a Geriatric Nutrition Risk Index (GNRI) of less than 86 was associated with poor prognosis. CONCLUSION GnP exhibited acceptable efficacy and safety in patients ≥75 years old with MPC. GNRI might be helpful for identifying older individuals at higher risk of unfavorable outcomes.
Collapse
Affiliation(s)
- Futa Koga
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan, 400 Kase-machi, Saga-shi, Saga 840-8571, Japan; Saga University Graduate School of Medical Science, 5-1-1 Nabeshima, Saga-shi, Saga 849-8501, Japan
| | - Yasunori Kawaguchi
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan, 400 Kase-machi, Saga-shi, Saga 840-8571, Japan; Department of Gastroenterology, Asakura Medical Association Hospital, 422-1 Raiha, Asakura-shi, Fukuoka 838-0069, Japan
| | - Mototsugu Shimokawa
- Clinical Research Institute, National Kyushu Cancer Center, 3-1-1 Notame, Minami-ku, Fukuoka-shi, Fukuoka, 811-1395, Japan; Department of Biostatistics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube-shi, Yamaguchi 755-8505, Japan
| | - Kenichiro Murayama
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan, 400 Kase-machi, Saga-shi, Saga 840-8571, Japan
| | - Shunya Nakashita
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan, 400 Kase-machi, Saga-shi, Saga 840-8571, Japan
| | - Noriko Oza
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan, 400 Kase-machi, Saga-shi, Saga 840-8571, Japan
| | - Norio Ureshino
- Department of Medical Oncology, Saga Medical Center Koseikan, 400 Kase-machi, Saga-shi, Saga 840-8571, Japan; Department of Medical Oncology, Kimitsu Chuo Hospital, 1010 Sakurai, Kisarazu-shi, Chiba, 292-8535, Japan
| | - Hirokazu Takahashi
- Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga-shi, Saga 849-8501, Japan
| | - Yujiro Ueda
- Department of Hematology and Oncology, Japanese Red Cross Kumamoto Hospital, 2-1-1 Nagamine-minami, Higashi-ku, Kumamoto-shi, Kumamoto 861-8520, Japan
| | - Junichi Nakazawa
- Department of Medical Oncology, Kagoshima City Hospital, 37-1 Uearata-cho, Kagoshima-shi, Kagoshima 890-8760, Japan
| | - Azusa Komori
- Department of Medical Oncology and Hematology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan
| | - Satoshi Otsu
- Department of Medical Oncology and Hematology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan
| | - Shiho Arima
- Digestive and Lifestyle Diseases, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima-shi, Kagoshima 890-8520, Japan
| | - Masaru Fukahori
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume-shi, Fukuoka 830-0011, Japan
| | - Akitaka Makiyama
- Department of Hematology/Oncology, Japan Community Healthcare Organization Kyushu Hospital, 1-8-1 Kishinoura, Yahatanishi-ku, Kitakyushu-shi, Fukuoka 806-8501, Japan; Cancer Center, Gifu University Hospital, 1-1 Yanagido, Gifu-shi, Gifu 501-1194, Japan
| | - Hiroki Taguchi
- Department of Gastroenterology, Saiseikai Sendai Hospital, 2-46 Harada-cho, Satsumasendai-shi, Kagoshima 895-0074, Japan; Department of Gastroenterology, Izumi General Medical Center, 520 Myojin-cho, Izumi-shi, Kagoshima 899-0131, Japan
| | - Takuya Honda
- Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki-shi, Nagasaki 852-8501, Japan
| | - Taro Shibuki
- Department of Internal Medicine, Imari Arita Kyoritsu Hospital, 860 Ninose-ko, Arita-cho, Nishi-matsuura-gun, Saga 849-4193, Japan; Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanohara, Kashiwa-shi, Chiba 277-8577, Japan
| | - Kenta Nio
- Department of Medical Oncology, Sasebo Kyosai Hospital, 10-17 Shimanji-cho, Sasebo-shi, Nagasaki 857-8575, Japan
| | - Yasushi Ide
- Department of Internal Medicine, Karatsu Red Cross Hospital, 2430 Watada, Karatsu-shi, Saga 847-8588, Japan
| | - Toshihiko Mizuta
- Department of Internal Medicine, Imari Arita Kyoritsu Hospital, 860 Ninose-ko, Arita-cho, Nishi-matsuura-gun, Saga 849-4193, Japan; Department of Internal Medicine, Fujikawa Hospital, 1-2-6 Matsubara, Saga-shi, Saga 840-0831, Japan
| | - Tsuyoshi Shirakawa
- Department of Medical Oncology, Fukuoka Wajiro Hospital, 2-2-75 Wajirogaoka, Higashi-ku, Fukuoka-shi, Fukuoka 811-0213, Japan; Karatsu Higashi-matsuura Medical Association Center, 2566-11 Chiyoda-machi, Karatsu-shi, Saga 847-0041, Japan
| | - Taiga Otsuka
- Department of Medical Oncology, Saga Medical Center Koseikan, 400 Kase-machi, Saga-shi, Saga 840-8571, Japan; Department of Internal Medicine, Minato Medical Clinic, 3-11-3 Nagahama, Chuo-ku, Fukuoka-shi, Fukuoka 810-0072, Japan.
| | - Kenji Mitsugi
- Department of Medical Oncology, Hamanomachi Hospital, 3-3-1 Nagahama, Chuo-ku, Fukuoka-shi, Fukuoka, 810-8539, Japan
| |
Collapse
|
4
|
Murayama K, Okada M, Tanaka K, Inadomi C, Yoshioka W, Kubotsu Y, Yada T, Isoda H, Kuwashiro T, Oeda S, Akiyama T, Oza N, Hyogo H, Ono M, Kawaguchi T, Torimura T, Anzai K, Eguchi Y, Takahashi H. Prediction of Nonalcoholic Fatty Liver Disease Using Noninvasive and Non-Imaging Procedures in Japanese Health Checkup Examinees. Diagnostics (Basel) 2021; 11:diagnostics11010132. [PMID: 33467114 PMCID: PMC7830542 DOI: 10.3390/diagnostics11010132] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 12/09/2020] [Revised: 01/11/2021] [Accepted: 01/13/2021] [Indexed: 12/17/2022] Open
Abstract
Access to imaging is limited for diagnosing nonalcoholic fatty liver disease (NAFLD) in general populations. This study evaluated the diagnostic performance of noninvasive and nonimaging indexes to predict NAFLD in the general Japanese population. Health checkup examinees without hepatitis virus infection or habitual alcohol drinking were included. Fatty liver was diagnosed by ultrasonography. The hepatic steatosis index (HSI), Zhejiang University (ZJU) index, and fatty liver index (FLI) were determined, and risk of advanced liver fibrosis was evaluated by the fibrosis-4 index. NAFLD was diagnosed in 1935 (28.0%) of the 6927 subjects. The area under the receiver operating characteristic (AUROC) curve of the HSI, ZJU index, and FLI was 0.874, 0.886, and 0.884, respectively. The AUROC of the ZJU index (p < 0.001) and FLI (p = 0.002) was significantly greater than that for the HSI. In subjects with a high risk of advanced fibrosis, the sensitivity of the HSI, ZJU index, and FLI were 88.8%, 94.4%, and 83.3% with a low cut-off value and the specificity was 98.5%, 100%, and 100% with a high cut-off value. In conclusion, all indexes were useful to diagnose NAFLD in the general Japanese population and in subjects with potentially advanced liver fibrosis.
Collapse
Affiliation(s)
- Kenichiro Murayama
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan, Saga 840-8571, Japan;
| | - Michiaki Okada
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Kenichi Tanaka
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Chika Inadomi
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Wataru Yoshioka
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Yoshihito Kubotsu
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Tomomi Yada
- Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (T.Y.); (H.I.); (S.O.); (Y.E.)
| | - Hiroshi Isoda
- Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (T.Y.); (H.I.); (S.O.); (Y.E.)
| | - Takuya Kuwashiro
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Satoshi Oeda
- Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (T.Y.); (H.I.); (S.O.); (Y.E.)
| | - Takumi Akiyama
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Noriko Oza
- Department of Hepatobiliary and Pancreatology, Saga Medical Center Koseikan, Saga 840-8571, Japan;
| | - Hideyuki Hyogo
- Department of Gastroenterology and Hepatology, JA Hiroshima General Hospital, Hatsukaichi 738-8503, Japan;
| | - Masafumi Ono
- Tokyo Women’s Medical University Medical Center East, Internal Medicine, Tokyo 116-8567, Japan;
| | - Takumi Kawaguchi
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume 830-0011, Japan; (T.K.); (T.T.)
| | - Takuji Torimura
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume 830-0011, Japan; (T.K.); (T.T.)
| | - Keizo Anzai
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
| | - Yuichiro Eguchi
- Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (T.Y.); (H.I.); (S.O.); (Y.E.)
- Department of Clinical Gastroenterology, Eguchi Hospital, Ogi 845-0032, Japan
| | - Hirokazu Takahashi
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (K.M.); (M.O.); (K.T.); (C.I.); (W.Y.); (Y.K.); (T.K.); (T.A.); (K.A.)
- Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, Saga 849-8501, Japan; (T.Y.); (H.I.); (S.O.); (Y.E.)
- Correspondence: ; Tel.: +81-952-34-3010
| |
Collapse
|
5
|
Takeda A, Murayama K, Okazaki Y, Imai-Okazaki A, Ohtake A, Takakuwa E, Yamazawa H, Izumi G, Abe J, Nagai A, Taniguchi K, Sasaki D, Tsujioka T, Basgen J. Advanced pathologic study for definite diagnosis of mitochondrial cardiomyopathy. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2041] [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
Mitochondrial cardiomyopathy (MCM) is usually recognized as one of the phenotypes of systemic mitochondrial disease. However if there are no cardiac symptoms, it is difficult to make a definite diagnosis because of various cardiovascular phenotypes and no diagnostic criteria in pathological examination. To add myocardial pathology to the diagnostic criteria for mitochondrial respiratory chain disorders, which is the gold standard in the diagnosis of mitochondrial diseases, we performed quantitative analysis of mitochondria using electron microscopy and immunohistopathologic analysis with respiratory chain enzyme antibodies. Ten patients with hypertrophic or restrictive cardiomyopathy who had undergone endomyocardial biopsy were studied. Respiratory chain enzymatic assay and genetic study were performed and four patients were diagnosed with MCM. Using electron microscopy with quantitative analysis, volume density of mitochondria within cardiac muscle cells was significantly increased in the MCM group compared to the non-MCM group (p=0.013). Immunohistopathologic results were compatible with the result of the respiratory chain enzymatic assay. These advanced pathological tests can distinguish MCM from other cardiomyopathies.
Results of immunopathologic study
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): The Practical Research Project for Rare/Intractable Diseases from the Japan Agency for Medical Research and Development, AMED.
Collapse
Affiliation(s)
- A Takeda
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - K Murayama
- Chiba Children's Hospital, Department of Metabolism, Chiba, Japan
| | - Y Okazaki
- Juntendo University Graduate School of Medicine, Intractable Disease Research Center, Tokyo, Japan
| | - A Imai-Okazaki
- Juntendo University Graduate School of Medicine, Intractable Disease Research Center, Tokyo, Japan
| | - A Ohtake
- Saitama Medical University, Department of Paediatrics, Saitama, Japan
| | - E Takakuwa
- Hokkaido University, Department of Surgical Pathology, Sapporo, Japan
| | - H Yamazawa
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - G Izumi
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - J Abe
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - A Nagai
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - K Taniguchi
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - D Sasaki
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - T Tsujioka
- Hokkaido University, Department of Paediatrics, Sapporo, Japan
| | - J Basgen
- Charles R. Drew University of Science and Medicine, Department of Research, Los Angeles, United States of America
| |
Collapse
|
6
|
Murayama K, Suzuki S, Nagata H, Oda J, Nakahara I, Katada K, Fujii K, Toyama H. Visualization of Lenticulostriate Arteries on CT Angiography Using Ultra-High-Resolution CT Compared with Conventional-Detector CT. AJNR Am J Neuroradiol 2019; 41:219-223. [PMID: 31857330 DOI: 10.3174/ajnr.a6377] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 11/12/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The newly developed ultra-high-resolution CT is equipped with a 0.25-mm detector, which has one-half the conventional section thickness, one-half the in-plane detector element width, and one-half the reconstructed pixel width compared with conventional-detector CT. Thus, the ultra-high-resolution CT scanner should provide better image quality for microvasculature than the conventional-detector CT scanners. This study aimed to determine whether ultra-high-resolution CT produces superior-quality images of the lenticulostriate arteries compared with conventional-detector CT. MATERIALS AND METHODS From February 2017 to June 2017, thirteen patients with aneurysms (4 men, 9 women; mean age, 61.2 years) who underwent head CTA with both ultra-high-resolution CT and conventional-detector CT were enrolled. Two board-certified radiologists determined the number of all lenticulostriate arteries on the CTA coronal images of the MCA M1 segment reconstructed from 512 matrixes on conventional-detector CT and 1024 matrixes on ultra-high-resolution CT. RESULTS There were statistically more lenticulostriate arteries identified on ultra-high-resolution CT (average, 2.85 ± 0.83; 95% CI, 2.509-3.183) than on conventional-detector CT (average, 2.17 ± 0.76; 95% CI, 1.866-2.480) (P = .009) in 16 of the total 26 MCA M1 segments. CONCLUSIONS Improvements in lenticulostriate artery visualization were the result of the combined package of the ultra-high-resolution CT scanner plus the ultra-high-resolution scanning protocol, which includes higher radiation doses with lower than the national diagnostic reference levels and stronger adaptive iterative dose-reduction processing. This package for ultra-high-resolution CT is a simple, noninvasive, and easily accessible method to evaluate microvasculature such as the lenticulostriate arteries.
Collapse
Affiliation(s)
- K Murayama
- From the Joint Research Laboratory of Advanced Medical Imaging (K.M.)
| | - S Suzuki
- Departments of Radiology (S.S., H.N., K.K., H.T.)
| | - H Nagata
- Departments of Radiology (S.S., H.N., K.K., H.T.)
| | - J Oda
- Comprehensive Strokology (J.O., I.N.), Fujita Health University, Aichi, Japan
| | - I Nakahara
- Comprehensive Strokology (J.O., I.N.), Fujita Health University, Aichi, Japan
| | - K Katada
- Departments of Radiology (S.S., H.N., K.K., H.T.)
| | - K Fujii
- Canon Medical Systems (K.F.), Otawara, Japan
| | - H Toyama
- Departments of Radiology (S.S., H.N., K.K., H.T.)
| |
Collapse
|
7
|
Meliss S, Murayama K. Differential effects of intrinsic and extrinsic rewards on recognition memory. Brain Cogn 2019. [DOI: 10.1016/j.bandc.2019.10.025] [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]
|
8
|
Meijs M, Pegge SAH, Murayama K, Boogaarts HD, Prokop M, Willems PWA, Manniesing R, Meijer FJA. Color-Mapping of 4D-CTA for the Detection of Cranial Arteriovenous Shunts. AJNR Am J Neuroradiol 2019; 40:1498-1504. [PMID: 31395664 DOI: 10.3174/ajnr.a6156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 06/25/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE 4D CT angiography is increasingly used in clinical practice for the assessment of different neurovascular disorders. Optimized processing of 4D-CTA is crucial for diagnostic interpretation because of the large amount of data that is generated. A color-mapping method for 4D-CTA is presented for improved and enhanced visualization of the cerebral vasculature hemodynamics. This method was applied to detect cranial AVFs. MATERIALS AND METHODS All patients who underwent both 4D-CTA and DSA in our hospital from 2011 to 2018 for the clinical suspicion of a cranial AVF or carotid cavernous fistula were retrospectively collected. Temporal information in the cerebral vasculature was visualized using a patient-specific color scale. All color-maps were evaluated by 3 observers for the presence or absence of an AVF or carotid cavernous fistula. The presence or absence of cortical venous reflux was evaluated as a secondary outcome measure. RESULTS In total, 31 patients were included, 21 patients with and 10 without an AVF. Arterialization of venous structures in AVFs was accurately visualized using color-mapping. There was high sensitivity (86%-100%) and moderate-to-high specificity (70%-100%) for the detection of AVFs on color-mapping 4D-CTA, even without the availability of dynamic subtraction rendering. The diagnostic performance of the 3 observers in the detection of cortical venous reflux was variable (sensitivity, 43%-88%; specificity, 60%-80%). CONCLUSIONS Arterialization of venous structures can be visualized using color-mapping of 4D-CTA and proves to be accurate for the detection of cranial AVFs. This finding makes color-mapping a promising visualization technique for assessing temporal hemodynamics in 4D-CTA.
Collapse
Affiliation(s)
- M Meijs
- From the Departments of Radiology and Nuclear Medicine (M.M., S.A.H.P., M.P., R.M., F.J.A.M.)
| | - S A H Pegge
- From the Departments of Radiology and Nuclear Medicine (M.M., S.A.H.P., M.P., R.M., F.J.A.M.)
| | - K Murayama
- Department of Radiology (K.M.), Fujita Health University, Toyoake, Japan
| | - H D Boogaarts
- Neurosurgery (H.D.B.), Radboud University Medical Center, Nijmegen, the Netherlands
| | - M Prokop
- From the Departments of Radiology and Nuclear Medicine (M.M., S.A.H.P., M.P., R.M., F.J.A.M.)
| | - P W A Willems
- Department of Neurosurgery (P.W.A.W.), University Medical Center Utrecht, Utrecht, the Netherlands
| | - R Manniesing
- From the Departments of Radiology and Nuclear Medicine (M.M., S.A.H.P., M.P., R.M., F.J.A.M.)
| | - F J A Meijer
- From the Departments of Radiology and Nuclear Medicine (M.M., S.A.H.P., M.P., R.M., F.J.A.M.)
| |
Collapse
|
9
|
Kitajima Y, Takahashi H, Akiyama T, Murayama K, Iwane S, Kuwashiro T, Tanaka K, Kawazoe S, Ono N, Eguchi T, Anzai K, Eguchi Y. Supplementation with branched-chain amino acids ameliorates hypoalbuminemia, prevents sarcopenia, and reduces fat accumulation in the skeletal muscles of patients with liver cirrhosis. J Gastroenterol 2018; 53:427-437. [PMID: 28741271 DOI: 10.1007/s00535-017-1370-x] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 07/13/2017] [Indexed: 02/04/2023]
Abstract
BACKGROUND Liver cirrhosis induces marked metabolic disorders, protein-energy malnutrition, and sarcopenia. The objective of the study reported here was to investigate the effects of dietary branched-chain amino acids (BCAAs) on systemic glucose metabolism, skeletal muscle, and prognosis of patients with liver cirrhosis. METHODS Japanese patients with liver cirrhosis (n = 21) were enrolled into a longitudinal study in which their diets were supplemented with BCAAs. We evaluated glucose metabolism and analyzed the skeletal muscle area index (SAI) and intramuscular adipose tissue content (IMAC) using computed tomography. RESULTS After 48 weeks of supplementation with BCAAs, there were no changes in glucose metabolism and skeletal muscle findings. In patients with ameliorated hypoalbuminemia, IMAC was significantly decreased and SAI was preserved concomitant with decreasing 90- and 120-min post-challenge plasma glucose levels (P < 0.01 each). In patients without increased albumin levels, IMAC was significantly increased and the SAI was significantly decreased (P < 0.01 each). Liver-related event-free survival rates for 72 months were 63.6% in patients with decreased IMAC and 20.0% in patients with increased IMAC. CONCLUSIONS Amelioration of hypoalbuminemia associated with BCAA supplementation correlated with decreased fat accumulation in skeletal muscle, maintenance of skeletal muscle mass, and improved glucose sensitivity, all factors which may contribute to improving the survival of patients with liver cirrhosis.
Collapse
Affiliation(s)
- Yoichiro Kitajima
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan.,Department of Clinical Gastroenterology, Eguchi Hospital, Ogi, Japan
| | - Hirokazu Takahashi
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan
| | - Takumi Akiyama
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan
| | - Kenichiro Murayama
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan
| | - Shinji Iwane
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan
| | - Takuya Kuwashiro
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan
| | - Kenichi Tanaka
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan
| | - Seiji Kawazoe
- Hepatobiliary and Pancreatology Division, Department of Internal Medicine, Saga Prefectural Hospital Kosei-kan, Saga, Japan
| | - Naofumi Ono
- Department of Clinical Gastroenterology, Eguchi Hospital, Ogi, Japan
| | - Takahisa Eguchi
- Department of Clinical Gastroenterology, Eguchi Hospital, Ogi, Japan
| | - Keizo Anzai
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga, Japan
| | | |
Collapse
|
10
|
Otsuka T, Kawaguchi Y, Mizuta T, Ide Y, Koga F, Kumagai T, Yoshioka W, Murayama K, Rikitake O, Ikeda Y, Ozaki I. Asunaprevir and daclatasvir in hemodialysis patients with chronic hepatitis C virus genotype 1b infection. JGH Open 2017; 1:148-152. [PMID: 30483552 PMCID: PMC6207006 DOI: 10.1002/jgh3.12026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 10/12/2017] [Indexed: 12/16/2022]
Abstract
Background and Aim Patients requiring hemodialysis show high morbidity with hepatitis C virus (HCV) infection, but there are difficulties associated with interferon‐based therapies. Asunaprevir and daclatasvir could help patients with HCV genotype 1b because the drugs have a nonrenal metabolism and show good viral eradication. We evaluated the efficacy and safety of combined asunaprevir and daclatasvir therapy. Methods This was a multicenter prospective trial of patients with chronic hepatitis or compensated cirrhosis from HCV genotype 1b who had end‐stage renal disease requiring chronic hemodialysis. Asunaprevir and daclatasvir were administered orally (100 mg twice daily and 60 mg once daily, respectively) for 24 weeks. The primary end‐point was the proportion of patients achieving sustained virological response 12, defined as HCV RNA <15 IU/mL undetectable at 12 weeks after completion of asunaprevir and daclatasvir treatment. Results Between December 2014 and December 2015, 23 dialysis patients were enrolled, and 22 patients completed the protocol therapy. Sustained virological response 12 rates were 91.3% (95% confidence interval: 72.0–98.9) in the intention‐to‐treat and 95.5% (95% confidence interval: 77.2–99.9) in the per‐protocol populations. Serum aminotransferase significantly decreased after initiation of asunaprevir and daclatasvir (P < 0.01), although the level was low at baseline. Asunaprevir and daclatasvir were well tolerated; however, one patient could not continue because of infective endocarditis and cerebral infarction. Conclusions Asunaprevir and daclatasvir could help patients with chronic hepatitis C receiving hemodialysis. Close collaboration with dialysis physicians is important when treating these patients because hemodialysis carries life‐threatening risks.
Collapse
Affiliation(s)
- Taiga Otsuka
- Department of Internal Medicine, Division of Hepatology Saga University Hospital Saga Japan
| | - Yasunori Kawaguchi
- Hepato-Biliary and Pancreatology Division Saga Medical Center Koseikan Saga Japan
| | - Toshihiko Mizuta
- Department of Internal Medicine Imari-Arita Kyoritsu Hospital Saga Japan
| | - Yasushi Ide
- Department of Internal Medicine Karatsu Red Cross Hospital Saga Japan
| | - Futa Koga
- Department of Internal Medicine, Division of Hepatology Saga University Hospital Saga Japan
| | | | - Wataru Yoshioka
- Department of Internal Medicine, Division of Hepatology Saga University Hospital Saga Japan
| | - Kenichiro Murayama
- Department of Internal Medicine, Division of Hepatology Saga University Hospital Saga Japan
| | - Osamu Rikitake
- Department of Internal Medicine Rikitake Clinic Saga Japan
| | - Yuji Ikeda
- Department of Internal Medicine, Division of Nephrology Saga University Hospital Saga Japan
| | - Iwata Ozaki
- Department of Internal Medicine, Division of Hepatology Saga University Hospital Saga Japan
| |
Collapse
|
11
|
Sato R, Arai-Ichinoi N, Kikuchi A, Matsuhashi T, Numata-Uematsu Y, Uematsu M, Fujii Y, Murayama K, Ohtake A, Abe T, Kure S. Novel biallelic mutations in the PNPT1
gene encoding a mitochondrial-RNA-import protein PNPase cause delayed myelination. Clin Genet 2017; 93:242-247. [DOI: 10.1111/cge.13068] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/19/2017] [Accepted: 06/05/2017] [Indexed: 12/22/2022]
Affiliation(s)
- R. Sato
- Department of Pediatrics; Tohoku University School of Medicine; Miyagi Japan
| | - N. Arai-Ichinoi
- Department of Pediatrics; Tohoku University School of Medicine; Miyagi Japan
| | - A. Kikuchi
- Department of Pediatrics; Tohoku University School of Medicine; Miyagi Japan
| | - T. Matsuhashi
- Department of Pediatrics; Tohoku University School of Medicine; Miyagi Japan
| | - Y. Numata-Uematsu
- Department of Pediatrics; Tohoku University School of Medicine; Miyagi Japan
| | - M. Uematsu
- Department of Pediatrics; Tohoku University School of Medicine; Miyagi Japan
| | - Y. Fujii
- Department of Pediatrics; Hiroshima University Hospital; Hiroshima Japan
| | - K. Murayama
- Department of Metabolism; Chiba Children's Hospital; Chiba Japan
| | - A. Ohtake
- Department of Pediatrics; Saitama Medical University; Saitama Japan
| | - T. Abe
- Department of Nephrology, Endocrinology, and Vascular Medicine; Tohoku University School of Medicine; Miyagi Japan
| | - S. Kure
- Department of Pediatrics; Tohoku University School of Medicine; Miyagi Japan
| |
Collapse
|
12
|
Murayama K. HUMAN RIGHTS AND DEMENTIA: ARE FAMILY CAREGIVERS LIABLE FOR DAMAGES? Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3025] [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: 11/13/2022] Open
Affiliation(s)
- K. Murayama
- Advanced Research Center for Human Sciences, Waseda University, Tokorozawa, Saitama, Japan
| |
Collapse
|
13
|
Isoda H, Takahashi H, Eguchi Y, Kojima M, Inoue K, Murayama K, Matsuda Y, Anzai K. Re-evaluation of glycated hemoglobin and glycated albumin with continuous glucose monitoring system as markers of glycemia in patients with liver cirrhosis. Biomed Rep 2017; 7:286. [PMID: 28819562 PMCID: PMC5549597 DOI: 10.3892/br.2017.928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
[This retracts the article DOI: 10.3892/br.2016.808.].
Collapse
|
14
|
Isoda H, Takahashi H, Eguchi Y, Kojima M, Inoue K, Murayama K, Matsuda Y, Anzai K. Re-evaluation of glycated hemoglobin and glycated albumin with continuous glucose monitoring system as markers of glycemia in patients with liver cirrhosis. Biomed Rep 2016; 6:51-56. [PMID: 28123707 PMCID: PMC5244784 DOI: 10.3892/br.2016.808] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 09/22/2016] [Indexed: 12/20/2022] Open
Abstract
Liver cirrhosis (LC) is frequently accompanied by glucose intolerance. The present study was designed to determine whether glycated hemoglobin A1c (HbA1c) and glycated albumin (GA) were predictive markers of glycemia, as determined by a continuous glucose monitoring system (CGMS), in patients with LC. A total of 30 patients with LC, including 3, 19, 5, 2 and 1 with LC due to hepatitis B virus, hepatitis C virus, non-alcoholic steatohepatitis, alcohol and unknown causes, respectively, were assessed by CGMS. The average, maximum and minimum blood glucose (BG) levels were measured by CGMS, and correlated with HbA1c and GA. The average, maximum and minimum BG in these individuals were 142±38.7, 209.3±65.7 and 85.1±25.4 mg/dl, respectively. HbA1c was significantly correlated with average BG (r=0.447, P=0.015) and maximum BG (r=0.523, P=0.004). In addition, GA was significantly correlated with average BG (r=0.687, P<0.001) and maximum BG (r=0.648, P<0.001). Neither HbA1c nor GA was significantly correlated with minimum BG. Correlation analysis yielded formulas by which HbA1c and GA were predictive of average BG in individuals with LC: Average BG=19.2 × HbA1c (%) + 36.5 and average BG=6.6 × GA (%) + 13.0, respectively. In conclusion, HbA1c and GA showed significant correlations with average and maximum BG, as determined by CGMS. The derived formulas allow for estimates of average BG based on HbA1c and GA, and may contribute to the control of glycemia in patients with LC.
Collapse
Affiliation(s)
- Hiroshi Isoda
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 8498501, Japan
| | - Hirokazu Takahashi
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 8498501, Japan
| | - Yuichiro Eguchi
- Division of Hepatology, Liver Center, Saga Medical School, Saga 8498501, Japan
| | - Motoyasu Kojima
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 8498501, Japan
| | - Kanako Inoue
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 8498501, Japan
| | - Kenichiro Murayama
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 8498501, Japan
| | - Yayoi Matsuda
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 8498501, Japan
| | - Keizo Anzai
- Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University, Saga 8498501, Japan
| |
Collapse
|
15
|
Zaha K, Matsumoto H, Itoh M, Saitsu H, Kato K, Kato M, Ogata S, Murayama K, Kishita Y, Mizuno Y, Kohda M, Nishino I, Ohtake A, Okazaki Y, Matsumoto N, Nonoyama S. DNM1L-related encephalopathy in infancy with Leigh syndrome-like phenotype and suppression-burst. Clin Genet 2016; 90:472-474. [PMID: 27301544 DOI: 10.1111/cge.12805] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/13/2016] [Accepted: 05/13/2016] [Indexed: 11/30/2022]
Affiliation(s)
- K Zaha
- Department of Pediatrics, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - H Matsumoto
- Department of Pediatrics, National Defense Medical College, Tokorozawa, Saitama, Japan.
| | - M Itoh
- Department of Mental Retardation and Birth Defect Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
| | - H Saitsu
- Department of human genetics, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - K Kato
- Department of Laboratory Medicine, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - M Kato
- Department of Pediatrics, Yamagata University Faculty of Medicine, Yamagata, Yamagata, Japan
| | - S Ogata
- Department of Laboratory Medicine, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - K Murayama
- Department of Metabolism, Chiba Children's Hospital, Chiba, Japan
| | - Y Kishita
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan
| | - Y Mizuno
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan.,Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan
| | - M Kohda
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan
| | - I Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - A Ohtake
- Department of Pediatrics, Saitama Medical University, Saitama, Japan
| | - Y Okazaki
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan.,Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan
| | - N Matsumoto
- Department of human genetics, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - S Nonoyama
- Department of Pediatrics, National Defense Medical College, Tokorozawa, Saitama, Japan
| |
Collapse
|
16
|
Niinomi H, Sugiyama T, Tagawa M, Murayama K, Harada S, Ujihara T. Enantioselective amplification on circularly polarized laser-induced chiral nucleation from a NaClO3solution containing Ag nanoparticles. CrystEngComm 2016. [DOI: 10.1039/c6ce01464j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Yoshida S, Yamagata Y, Murayama K, Watanabe K, Imura T, Igarashi Y, Inagaki A, Fujimori K, Ohashi K, Ohuchi N, Satomi S, Goto M. The influence of collagen III expression on the efficiency of cell isolation with the use of collagenase H. Transplant Proc 2015; 46:1942-4. [PMID: 25131077 DOI: 10.1016/j.transproceed.2014.06.007] [Citation(s) in RCA: 3] [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: 12/13/2022]
Abstract
OBJECTIVE We previously demonstrated that collagenase H (ColH) plays a crucial role in rat islet isolation, whereas collagenase G (ColG) plays only a supporting role. We also showed that collagen III appears to be one of the key targets of ColH based on a mass spectrometry analysis. In the present study, we investigated whether our novel findings in an islet isolation model are universally applicable for other types of cell isolation, such as a hepatocyte isolation, with the use of enzyme blends of recombinant collagenases. METHODS As the first step, the expression of one of the main matrix components, collagen III, on rat pancreatic and hepatic tissues was assessed with the use of immunohistochemical staining. ColG and ColH were expressed in recombinant E. coli carrying expression plasmids for each collagenase. Then the efficiency of the collagenase subtype on rat hepatocyte isolation was evaluated in terms of cell yield with the use of thermolysin combined with either ColG or ColH (n = 3, respectively). RESULTS The expression of collagen III on rat hepatic tissues was dramatically lower than that of rat pancreatic tissues. In the rat hepatocyte isolation, a substantial amount of hepatocytes (0.81 ± 0.11 × 10(6)) were obtained in the ColG group, whereas almost no hepatocytes were retrieved in the ColH group, indicating that the influence of the collagenase subtypes in rat hepatocyte isolation are completely opposite to that observed in rat islet isolation. CONCLUSIONS Considering that the expression of collagen III on hepatic tissues was relatively low and that almost no hepatocytes were retrieved when ColH and thermolysin were used, the present study supports our novel finding that collagen III appears to be one of the key targets of ColH in hepatocyte isolation. Therefore, the semiquantification of collagen III on the target tissues not only may positively contribute to efficient islet isolation, but also may affect other types of cell isolation by optimizing the ColH amount.
Collapse
Affiliation(s)
- S Yoshida
- Division of Advanced Surgical Science and Technology, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - Y Yamagata
- New Industry Creation Hatchery Center, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan; Department of Applied Biological Chemistry, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - K Murayama
- Division of Biomedical Measurements and Diagnostics, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - K Watanabe
- New Industry Creation Hatchery Center, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - T Imura
- New Industry Creation Hatchery Center, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - Y Igarashi
- New Industry Creation Hatchery Center, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - A Inagaki
- New Industry Creation Hatchery Center, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - K Fujimori
- Division of Advanced Surgical Science and Technology, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - K Ohashi
- Department of Surgery, Nara Medical University, Kashihara, Japan
| | - N Ohuchi
- Division of Advanced Surgical Science and Technology, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - S Satomi
- Division of Advanced Surgical Science and Technology, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan
| | - M Goto
- Division of Advanced Surgical Science and Technology, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan; New Industry Creation Hatchery Center, Graduate School of Medical Engineering, Tohoku University, Sendai, Japan.
| |
Collapse
|
18
|
Higashi Y, Nakao H, Shirakawa A, Ueda K, Kaminskii AA, Kuretake S, Kintaka Y, Murayama K, Tanaka N. Femtosecond mode-locked Nd(3+)-doped Ba(Zr,Mg,Ta)O(3) ceramic laser. Opt Lett 2015; 40:3818-3821. [PMID: 26274668 DOI: 10.1364/ol.40.003818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have demonstrated continuous wave (CW) laser operation and the first, to the best of our knowledge, sub-200 fs mode-locked laser operation of Nd(3+)-doped Ba(Zr,Mg,Ta)O(3) ceramic. Its disordered crystalline nature exhibits a broad gain bandwidth of 30 nm with a high-emission cross section. It also has higher thermal and mechanical properties than Nd:glass. In CW operation, a maximum output power of 1.5 W under 6.2 W of absorbed pump power was obtained. In mode-locked operation, a pulse duration of 196 fs with an average power of 60 mW was successfully achieved. The laser spectrum straddled both fluorescence peaks of A-site and B-site Nd(3+) ions.
Collapse
|
19
|
Igarashi T, Murayama K, Irisawa H, Murata N. Follow-Up of Reactivation of HB Virus in HBV Antibody Positive Lymphoma After Chemotherapy in a Single Institution. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
20
|
Hayakawa M, Tanaka T, Sadato A, Adachi K, Ito K, Hattori N, Omi T, Oheda M, Katada K, Murayama K, Kato Y, Hirose Y. Detection of Pulsation in Unruptured Cerebral Aneurysms by ECG-Gated 3D-CT Angiography (4D-CTA) with 320-Row Area Detector CT (ADCT) and Follow-up Evaluation Results: Assessment Based on Heart Rate at the Time of Scanning. Clin Neuroradiol 2013; 24:145-50. [DOI: 10.1007/s00062-013-0236-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Accepted: 06/24/2013] [Indexed: 11/28/2022]
|
21
|
Matsubara S, Imai K, Murayama K, Higashizawa T. Severe liver dysfunction during nausea and vomiting of pregnancy: folic acid supplement as a suggested culprit. J OBSTET GYNAECOL 2012; 32:701-2. [PMID: 22943726 DOI: 10.3109/01443615.2012.698332] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- S Matsubara
- Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
| | | | | | | |
Collapse
|
22
|
Wakiya T, Sanada Y, Urahashi T, Ihara Y, Yamada N, Okada N, Egami S, Sakamoto K, Murayama K, Hakamada K, Yasuda Y, Mizuta K. Living donor liver transplantation from an asymptomatic mother who was a carrier for ornithine transcarbamylase deficiency. Pediatr Transplant 2012; 16:E196-200. [PMID: 22583334 DOI: 10.1111/j.1399-3046.2012.01716.x] [Citation(s) in RCA: 18] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Liver transplantation (LT) has been adopted as a radical treatment for ornithine transcarbamylase deficiency (OTCD), yielding favorable outcomes. Despite the fact that it is an inheritable disease, a blood relative who is heterozygous for the disorder must sometimes be used as a liver donor for living donor LT. There is ongoing discussion regarding the use of heterozygous donors, however, to our knowledge, no cases where donation was determined based on the Ornithine transcarbamylase (OTC) activity before LT have been reported. Between May 2001 and April 2011, 17 patients were indicated for living donor LT because of OTCD at our facility. There were three cases with heterozygous donor candidate (17.6%). All heterozygous candidates underwent a liver biopsy to measure their OTC activity before LT and made efforts to secure the safety of the both donor and recipient. Two of 3 candidates had headaches sometimes, and their activity was less than 40%, and thus they were not employed as the donor. One candidate with 104.4% activity was employed, yielding favorable outcomes. Our current experience supported the effectiveness of our donation criteria, however it is necessary to collect sufficient data on a large number of patients to confirm the safety of the procedure.
Collapse
Affiliation(s)
- T Wakiya
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Morishita EC, Murayama K, Kato-Murayama M, Hayashi T, Terada T, Handa N, Shirouzu M, Akiyama T, Yokoyama S. Crystal structures of adenomatous polyposis coli and its complex with Sam68. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311091355] [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
|
24
|
Adachi H, Hirai Y, Enomoto M, Fukami A, Otsuka M, Kumagae SI, Nanjo Y, Esaki E, Kumagai E, Yoshikawa K, Yokoi K, Ogata K, Tsukagawa E, Kasahara A, Murayama K, Imaizumi T. P1-66 Trends in nutritional intake and serum cholesterol levels over 50 years in Tanushimaru, Japanese men. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976c.59] [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]
|
25
|
Fukami A, Adachi H, Hirai Y, Enomoto M, Otsuka M, Nanjo Y, Yoshikawa K, Esaki E, Kumagai E, Ogata K, Kasahara A, Tsukagawa E, Yokoi K, Murayama K, Imaizumi T. P2-90 High levels of plasma homocysteine predicts development of hypertension in a general population. The Tanushimaru Study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976i.25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
26
|
Otsuka M, Adachi H, Hirai Y, Enomoto M, Fukami A, Kumagae SI, Nanjo Y, Yoshikawa K, Esaki E, Kumagai E, Yokoi K, Ogata K, Tsukagawa E, Kasahara A, Murayama K, Imaizumi T. SP3-50 Serum hepatocyte growth factor levels and mortalities from cancer in apparently healthy general population. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976o.50] [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]
|
27
|
Wakiya T, Sanada Y, Mizuta K, Umehara M, Urahasi T, Egami S, Hishikawa S, Fujiwara T, Sakuma Y, Hyodo M, Murayama K, Hakamada K, Yasuda Y, Kawarasaki H. Living donor liver transplantation for ornithine transcarbamylase deficiency. Pediatr Transplant 2011; 15:390-5. [PMID: 21585627 DOI: 10.1111/j.1399-3046.2011.01494.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ornithine transcarbamylase deficiency, the most common urea cycle disorder, causes hyperammonemic encephalopathy and has a poor prognosis. Recently, LT was introduced as a radical OTCD treatment, yielding favorable outcomes. We retrospectively analyzed LT results for OTCD at our facility. Twelve children with OTCD (six boys and six girls) accounted for 7.1% of the 170 children who underwent LDLT at our department between May 2001 and April 2010. Ages at LT ranged from nine months to 11 yr seven months. Post-operative follow-up period was 3-97 months. The post-operative survival rate was 91.7%. One patient died. Two patients who had neurological impairment preoperatively showed no alleviation after LT. All patients other than those who died or failed to show recovery from impairment achieved satisfactory quality-of-life improvement after LT. The outcomes of LDLT as a radical OTCD treatment have been satisfactory. However, neurological impairment associated with hyperammonemia is unlikely to subside even after LT. It is desirable henceforth that more objective and concrete guidelines for OTCD management be established to facilitate LDLT with optimal timing while avoiding the risk of hyperammonemic episodes.
Collapse
Affiliation(s)
- T Wakiya
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke, Tochigi, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Takahashi H, Tomita N, Yokoyama M, Tsunoda S, Yano T, Murayama K, Hashimoto C, Tamura K, Sato K, Fujita H, Ishigatsubo Y. Prognostic impact for different sites of extranodal involvement in patients with diffuse large B-cell lymphoma in the rituximab era. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18505] [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: 11/20/2022] Open
|
29
|
Murayama K, Katada K, Toyama H, Hayakawa M. Quantitative Evaluation of the Penumbra and Ischemic Core in Acute Cerebral Infarction Using Whole-Brain CT Perfusion. Neuroradiol J 2011; 24:48-58. [DOI: 10.1177/197140091102400109] [Citation(s) in RCA: 3] [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: 10/04/2010] [Accepted: 01/03/2011] [Indexed: 11/17/2022] Open
Abstract
The objectives of the study were to quantitatively assess whole-brain CT Perfusion (CTP) data using an automatic region of interest (ROI) analysis program in order to distinguish between the degree of ischemia in the ischemic core and that in the penumbra and to assess the relationship between expansion of the area of infarction. The subjects were 20 patients with acute cerebral infarction. Whole-brain CTP was performed for all subjects using a 320-row area detector CT scanner. The penumbra* is defined as the region in which the CBV value is 2 mL/100 g or more and the ischemic core* is defined as the region in which the CBV value is less than 2 mL/100 g. The quantitative values of CTP parameters were automatically measured using the automatic ROIs analysis program. The Mann-Whitney U test was applied to differentiate between the ischemic core* and the penumbra*. The reduction in perfusion pressure in the penumbra* was smaller in the group with expansion of the area of infarction than in the group without expansion of the area of infarction. The difference in the median values between the penumbra* and the ischemic core* was larger in the group with expansion of the area of infarction than the group without expansion of the area of infarction. It is considered that the quantitative analysis method using whole-brain CTP may be useful for more accurately distinguishing between the ischemic core and the penumbra and for evaluating the risk of expansion of the ischemic core into the penumbra.
Collapse
Affiliation(s)
| | - K. Katada
- Department of Radiology, Fujita Health University; Toyoake, Japan
| | - H. Toyama
- Department of Radiology, Fujita Health University; Toyoake, Japan
| | - M. Hayakawa
- Department of Neurosurgery, Fujita Health University; Toyoake, Japan
| |
Collapse
|
30
|
Tomimitsu H, Arai A, Murayama K, Shimizu J, Suzuki N, Nagata T, Aoki M, Mizusawa H, Tanaka K, Nishino I. P2.04 DMRV and GNE mutations: genotype–phenotype correlation in 100 Japanese patients. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
31
|
Nishihata S, Murata T, Inoue S, Okubo K, Sahashi N, Takahashi H, Hirooka J, Hoshiyama Y, Murayama K, Mezawa A, Yokoyama T, Endo T, Saiga T, Saito Y. Prevalence of Japanese cedar pollinosis in Tokyo: a survey conducted by the Tokyo Metropolitan Government. ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1472-9733.2010.01149.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Igarashi T, Murayama K, Itoh K, Kurosawa M, Nagai H, Watanabe T, Tobinai K. Eight weekly infusions of rituximab (R) for relapsed patients (pts) with indolent B-cell lymphoma mostly pretreated with R: A Japanese multicenter phase II study. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e18510] [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: 11/20/2022] Open
|
33
|
Kato T, Takai T, Fujimura T, Matsuoka H, Ogawa T, Murayama K, Ishii A, Ikeda S, Okumura K, Ogawa H. Mite serine protease activates protease-activated receptor-2 and induces cytokine release in human keratinocytes. Allergy 2009; 64:1366-74. [PMID: 19416145 DOI: 10.1111/j.1398-9995.2009.02023.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [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: 12/12/2022]
Abstract
BACKGROUND House dust mites produce serine and cysteine proteases. Mite-derived proteases have been suggested to be involved in the pathogenesis of allergies; however, whether mite-derived serine protease activity can stimulate keratinocytes remains unknown. METHODS We examined the activation of primary human keratinocytes by serine protease-rich extract of whole mite culture and compared with that by recombinant group 1 allergens (rDer f 1 and rDer p 1), which exclusively exhibit cysteine protease activity. RESULTS Protease activity of whole mite culture extract (WCE), rDer f 1 and rDer p 1 induced the release of IL-8 and granulocyte-macrophage colony-stimulating factor. Protease activity of WCEs induced a significant upregulation of their mRNA expression but rDer f 1 had much less effect. Protease activity of the WCE stimulated intracellular Ca(2+) mobilization but rDer f 1 and rDer p 1 did not. The mobilization induced by agonists for the human protease-activated receptor (PAR)-2, an agonist peptide or trypsin, was diminished by pre-incubation of keratinocytes with WCE. rDer f 1 inefficiently cleaved a synthetic N-terminal peptide of PAR-2 at different sites from trypsin, but the resultant peptides did not stimulate the release of interleukin-8. CONCLUSIONS The results suggest that mite-derived serine protease activity may contribute to the pathogenesis of atopic dermatitis by activating keratinocytes via PAR-2 activation but cysteine protease activity of Der f 1 and Der p 1 acts via another mechanism.
Collapse
Affiliation(s)
- T Kato
- Atopy Research Center, Juntendo University School of Medicine, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Iwai I, Ikuta K, Murayama K, Hirao T. Change in optical properties of stratum corneum induced by protein carbonylation in vitro. Int J Cosmet Sci 2008; 30:41-6. [DOI: 10.1111/j.1468-2494.2008.00426.x] [Citation(s) in RCA: 18] [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] [Indexed: 11/27/2022]
|
35
|
Okada M, Kawahara G, Noguchi S, Sugie K, Murayama K, Nonaka I, Hayashi YK, Nishino I. Primary collagen VI deficiency is the second most common congenital muscular dystrophy in Japan. Neurology 2007; 69:1035-42. [PMID: 17785673 DOI: 10.1212/01.wnl.0000271387.10404.4e] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [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: 11/15/2022] Open
Abstract
OBJECTIVES To determine the frequency of primary collagen VI deficiency in congenital muscular dystrophy (CMD) in Japan and to establish the genotype-phenotype correlation. METHODS We performed immunohistochemistry for collagen VI in muscles from 362 Japanese patients with CMD, and directly sequenced the three collagen VI genes, COL6A1, COL6A2, and COL6A3, in patients found to have collagen VI deficiency. RESULTS In Japan, primary collagen VI deficiency accounts for 7.2% of congenital muscular deficiency. Among these patients, five had complete deficiency (CD) and 29 had sarcolemma-specific collagen VI deficiency (SSCD). We found two homozygous and three compound heterozygous mutations in COL6A2 and COL6A3 in all five patients with CD, and identified heterozygous missense mutations or in-frame small deletions in 21 patients with SSCD in the triple helical domain (THD) of COL6A1, COL6A2, and COL6A3. All mutations in SSCD were sporadic dominant. No genotype-phenotype correlation was seen. CONCLUSION Primary collagen VI deficiency is the second most common CMD after Fukuyama type CMD in Japan. Dominant mutations located in the N-terminal side from the cysteine residue in the THD of COL6A1, COL6A2, and COL6A3 are closely associated with SSCD.
Collapse
Affiliation(s)
- M Okada
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Ogawahigashi-cho, Kodaira, Tokyo, Japan
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Murayama K, Kimura T, Tarutani M, Tomooka M, Hayashi R, Okabe M, Nishida K, Itami S, Katayama I, Nakano T. Akt activation induces epidermal hyperplasia and proliferation of epidermal progenitors. Oncogene 2007; 26:4882-8. [PMID: 17297448 DOI: 10.1038/sj.onc.1210274] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [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: 11/09/2022]
Abstract
Various common signaling pathways maintain tissue stem cells, including Notch and Wnt/beta-catenin signals. Phosphoinositide-3 kinase (PI3K)/Akt signaling regulates the 'stemness' of several stem cells in culture, specifically in maintaining embryonic stem and neural stem cells, and in deriving embryonic germ cells from primordial germ cells. We examined the effect of Akt signaling in epidermal cells in transgenic mice expressing an Akt-Mer fusion protein whose kinase activity was conditionally activated by treatment with 4-hydroxytamoxifen (4OHT). The topical application of 4OHT to adult skin of the transgenic mice induced new hair growth in resting phase follicles. In addition, the mice showed hyperplasia in interfollicular epidermis (IFE) and hair follicles, which was presumably caused by the extensive proliferation of keratinocytes in basal layer of IFE and outer root sheath of hair follicles, respectively. The progenitor cell population increased consistently in 4OHT-treated transgenic mice. Our results show that PI3K/Akt signaling induces epidermal hyperplasia and proliferation of epidermal progenitors.
Collapse
Affiliation(s)
- K Murayama
- Department of Pathology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Kurosu Y, Murayama K, Shindo N, Shisa Y, Satou Y, Senda M, Ishioka N. Identification of Chirality of Phenylthiohydantoin-D-Amino Acid Residue of [D-ala2]-Metthionine Enkephalin by Capillary Electrophoresis: Suppression and Control of Racemization Ratio in the Edman Sequencing Method. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079808001262] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Y. Kurosu
- a JASCO Technical Research Laboratories Corporation , 2097-2, Ishikawa-cho, Hachioji-shi Tokyo, 192-0032, Japan
| | - K. Murayama
- b Division of Biochemical Analysis Central Laboratory of Medical Sciences Juntendo University School of Medicine , 3-1-3, Hongo, Bunkyo-ku Tokyo, 113-0033, Japan
| | - N. Shindo
- b Division of Biochemical Analysis Central Laboratory of Medical Sciences Juntendo University School of Medicine , 3-1-3, Hongo, Bunkyo-ku Tokyo, 113-0033, Japan
| | - Y. Shisa
- a JASCO Technical Research Laboratories Corporation , 2097-2, Ishikawa-cho, Hachioji-shi Tokyo, 192-0032, Japan
| | - Y. Satou
- a JASCO Technical Research Laboratories Corporation , 2097-2, Ishikawa-cho, Hachioji-shi Tokyo, 192-0032, Japan
| | - M. Senda
- a JASCO Technical Research Laboratories Corporation , 2097-2, Ishikawa-cho, Hachioji-shi Tokyo, 192-0032, Japan
| | - N. Ishioka
- c Division of Molecular Cell Biology Institute of DNA Medicine The Jikei University School of Medicine , 3-25-8, Nishi-shinbashi, Minato-ku Tokyo, 105-0003, Japan
| |
Collapse
|
38
|
Li X, Miyajima M, Mineki R, Taka H, Murayama K, Arai H. Analysis of potential diagnostic biomarkers in cerebrospinal fluid of idiopathic normal pressure hydrocephalus by proteomics. Acta Neurochir (Wien) 2006; 148:859-64; discussion 864. [PMID: 16755327 DOI: 10.1007/s00701-006-0787-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [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: 09/29/2005] [Accepted: 03/29/2006] [Indexed: 11/25/2022]
Abstract
BACKGROUND The pathogenesis of idiopathic normal pressure hydrocephalus (INPH) is unknown, and the syndrome of INPH remains a diagnostic and therapeutic challenge. The present study investigated the disease-specific proteins that aid in the diagnosis and treatment of INPH and thus to study their role in the disease process. METHODS A comparative proteomic analysis was used for clinical screening of cerebrospinal fluid (CSF) proteins in 15 patients with INPH and compared with 12 normal subjects. Furthermore, enzyme linked immunosorbent assay (ELISA) was performed for comparison with CSF proteins between individual INPH patients and controls. RESULTS Seven proteins and their isoforms, including leucine-rich alpha-2-glycoprotein (LRG), alpha1-antichymotrypsin, apolipoprotein D, apolipoprotein J, haptoglobin alpha1, serum albumin, and alpha-1-microglobulin/bikunin precursor showed significant changes in CSF of INPH patients compared with controls by proteomic analysis. And significant higher CSF levels of LRG in INPH patients compared with controls were found by ELISA. CONCLUSIONS These results indicate that there are significant differences in the expression of certain proteins in the CSF of patients with INPH and normal subjects. In particular, the CSF level assay of LRG suggests that LRG is a specific biomarker for INPH and has potential use in the diagnosis and indication for CSF shunting.
Collapse
Affiliation(s)
- X Li
- Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan.
| | | | | | | | | | | |
Collapse
|
39
|
Watanabe S, Umehara H, Murayama K, Okabe M, Kimura T, Nakano T. Activation of Akt signaling is sufficient to maintain pluripotency in mouse and primate embryonic stem cells. Oncogene 2006; 25:2697-707. [PMID: 16407845 DOI: 10.1038/sj.onc.1209307] [Citation(s) in RCA: 266] [Impact Index Per Article: 14.8] [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: 12/22/2022]
Abstract
Embryonic stem (ES) cells can self-renew indefinitely without losing their differentiation ability to any cell types. Phosphoinositide-3 kinase (PI3K)/Akt signaling plays a pivotal role in various stem cell systems, including the formation of embryonic germ (EG) cells from primordial germ cells and self-renewal of neural stem cells. Here, we show that myristoylated, active form of Akt (myr-Akt) maintained the undifferentiated phenotypes in mouse ES cells without the addition of leukemia inhibitory factor (LIF). The effects of myr-Akt were reversible, because LIF dependence and pluripotent differentiation activity were restored by the deletion of myr-Akt. In addition, myr-Akt-Mer fusion protein, whose enzymatic activity is controlled by 4-hydroxy-tamoxifen, also maintained the pluripotency of not only mouse but also cynomolgus monkey ES cells. These results clearly demonstrate that Akt signaling sufficiently maintains pluripotency in mouse and primate ES cells, and support the notion that PI3K/Akt signaling axis regulates 'stemness' in a broad spectrum of stem cell systems.
Collapse
Affiliation(s)
- S Watanabe
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, Japan
| | | | | | | | | | | |
Collapse
|
40
|
Murayama K, Nagasaka H, Tate K, Ohsone Y, Kanazawa M, Kobayashi K, Kohno Y, Takayanagi M. Significant correlations between the flow volume of patent ductus venosus and early neonatal liver function: possible involvement of patent ductus venosus in postnatal liver function. Arch Dis Child Fetal Neonatal Ed 2006; 91:F175-9. [PMID: 16449256 PMCID: PMC2672699 DOI: 10.1136/adc.2005.079822] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The biochemical features of portosystemic venous shunt with high flow volume are hypergalactosaemia, hyperammonaemia, prolonged blood coagulation time, and raised serum bile acid concentration. The ductus venosus remains open with shunt flow in most neonates for a certain period after birth. However, the effects of blood flow through the ductus venosus on neonatal liver function remain unclear. OBJECTIVE To elucidate the effect of patency of the ductus venosus on liver function in early neonates. METHODS Subjects were divided into three groups by gestational age (group I, 29-32 weeks; group II, 33-36 weeks; group III, 37-41 weeks). The shunt flow volume through the ductus venosus was examined serially using ultrasonography, and correlations between flow volume and liver function in the respective groups were calculated during the first week after birth. RESULTS Group I had a higher flow volume and later functional closure than the other two groups. Plasma ammonia and serum total bile acid concentrations correlated with flow volume in groups I and II, and blood galactose and galactose 1-phosphate concentrations correlated significantly with flow volume in group III. Percentage hepaplastin also correlated significantly with flow volume in all groups, but plasma vitamin K concentration did not in any group. CONCLUSIONS Patent ductus venosus has a considerable effect on crucial liver functions such as ammonia detoxification, blood coagulation, and regulation of serum total bile acid concentration in early neonates.
Collapse
Affiliation(s)
- K Murayama
- Division of Metabolism, Chiba Children's Hospital, 579-1, Chiba, 266-0007 Japan.
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Abstract
BACKGROUND X-linked myotubular myopathy (XLMTM) is a severe congenital disorder characterized by marked muscle weakness and hypotonia. Myotubularin, the protein product of the causative gene, MTM1, is thought to be a phosphatase for phosphatidylinositol-3-phosphate and may be involved in membrane trafficking. Analysis of MTM1 knocked-out mice indicates that the characteristic small fibers in XLMTM muscles are due to atrophy rather than hypoplasia. OBJECTIVE To characterize gene expression profiling of skeletal muscles with XLMTM. METHOD The authors analyzed the expression of more than 4,200 genes in skeletal muscles from eight patients with XLMTM using their custom cDNA microarray. RESULTS In XLMTM, gene expression analysis revealed pathognomonic upregulation of transcripts for cytoskeletal and extracellular matrix proteins within or around atrophic myofibers. CONCLUSION Remodeling of cytoskeletal and extracellular architecture appears to contribute to atrophy and intracellular organelle disorganization in XLMTM myofibers.
Collapse
MESH Headings
- Cytoskeletal Proteins/genetics
- Cytoskeletal Proteins/metabolism
- Cytoskeleton/genetics
- Cytoskeleton/metabolism
- Cytoskeleton/pathology
- Extracellular Matrix/genetics
- Extracellular Matrix/metabolism
- Extracellular Matrix/pathology
- Extracellular Matrix Proteins/genetics
- Gene Expression Profiling
- Gene Expression Regulation, Developmental/genetics
- Genetic Diseases, X-Linked/genetics
- Genetic Predisposition to Disease/genetics
- Humans
- Immunohistochemistry
- Infant
- Infant, Newborn
- Muscle Fibers, Skeletal/metabolism
- Muscle Fibers, Skeletal/pathology
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Muscular Atrophy/genetics
- Muscular Atrophy/metabolism
- Muscular Atrophy/physiopathology
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/metabolism
- Myopathies, Structural, Congenital/physiopathology
- Oligonucleotide Array Sequence Analysis
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Up-Regulation/genetics
Collapse
Affiliation(s)
- S Noguchi
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry,4-1-1 Ogawahigashi, Kodaira, Tokyo, 187-8502, Japan.
| | | | | | | | | |
Collapse
|
42
|
Izumi Y, Nagashima K, Murayama K, Zorumski CF. Acute effects of ethanol on hippocampal long-term potentiation and long-term depression are mediated by different mechanisms. Neuroscience 2005; 136:509-17. [PMID: 16216426 DOI: 10.1016/j.neuroscience.2005.08.002] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2005] [Revised: 07/22/2005] [Accepted: 08/01/2005] [Indexed: 12/26/2022]
Abstract
To determine potential mechanisms contributing to ethanol-induced cognitive impairment, we examined acute effects of ethanol on hippocampal N-methyl-d-aspartate receptors and forms of synaptic plasticity thought to underlie memory processing. In the CA1 region of rat hippocampal slices, ethanol partially inhibited N-methyl-d-aspartate receptor-mediated synaptic responses at concentrations up to 180 mM. The block of synaptic N-methyl-d-aspartate receptors by 60mM ethanol occluded the effects of 10 microM ifenprodil, an agent that has relative selectivity for N-methyl-D-aspartate receptors expressing NR1 and NR2B subunits. Ethanol did not occlude the effects of a low concentration of 2-amino-5-phosphonovalerate, an antagonist with less N-methyl-d-aspartate receptor subtype selectivity. Recent studies indicate that ifenprodil and other NR2B-selective antagonists inhibit N-methyl-D-aspartate receptor-dependent long-term depression but not long-term potentiation. We found that ethanol reversibly inhibited long-term depression in a manner consistent with its effects on synaptic N-methyl-D-aspartate receptors. Ethanol also inhibited the induction of N-methyl-D-aspartate receptor-dependent long-term potentiation, but the actions on long-term potentiation were complex and largely irreversible over the time course of our experiments. Furthermore, ethanol inhibited a form of long-term potentiation induced by very high frequency stimulation that does not depend on N-methyl-D-aspartate receptor activation. The effects of ethanol on both forms of long-term potentiation, but not on long-term depression, were at least partially reversed by block of GABA type A receptors with picrotoxin. These results indicate that pharmacologically relevant concentrations of ethanol exert preferential effects on a subtype of synaptic N-methyl-D-aspartate receptors in the CA1 hippocampal region. Inhibition of synaptic N-methyl-D-aspartate receptors appears to contribute strongly to ethanol-mediated long-term depression inhibition, but effects on long-term potentiation are complex, involving, at least partially, changes in GABAergic transmission.
Collapse
Affiliation(s)
- Y Izumi
- Department of Psychiatry, Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | | | | | | |
Collapse
|
43
|
Nishino I, Malicdan MCV, Murayama K, Nonaka I, Hayashi YK, Noguchi S. Molecular pathomechanism of distal myopathy with rimmed vacuoles. Acta Myol 2005; 24:80-3. [PMID: 16550921] [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: 05/07/2023]
Abstract
Distal myopathy with rimmed vacuoles (DMRV) and hereditary inclusion body myopathy (HIBM) are now known to be the same disease and are caused by mutations in tile GNE gene that encodes a bifunctional protein with two enzymatic activities: UDP-GlcNAc2-epimerase (GNE) and ManNAc kinase (MNK). GNE catalyzes the rate-limiting step in the sialic acid biosynthesis and MNK catalyzes the next step. So far, we have found homozygous or compound heterozygous mutations in 55 unrelated Japanese DMRV patients. Among them, c.1714G>C (p.V572L) mutation is the most common, accounting for 57% of the mutant alleles. The same mutation was recently identified also in Korean DMRV patients, raising the possibility of the presence of a common founder. We have also found that cardiac involvement is not very rare and is found in 18% of patients, albeit degree of severity widely varies; in some patients, it can result in sudden death. The length of time when patients become non ambulatory is diverse. The severity of clinical symptoms also varies widely, as evidenced by the presence of an asymptomatic homozygote harboring of p.D176V, the second most common mutation among Japanese patients. Patients' fibroblasts and myotubes are hyposialylated and this hyposialylation can be recovered by adding GNE metabolite, ManNAc, or sialic acid per se, NeuAc. Accordingly, the sialylation status in the skeletal muscle tissue is also greatly altered especially in fibers with rimmed vacuoles, suggesting the tight association between hyposialylation and the formation of rimmed vacuoles. However, we still do not know why hyposialylation leads to the formation of rimmed vacuoles. To further elucidate the pathomechanism and to develop a therapy of DMRV, we need to produce mouse model mouse for this disease.
Collapse
Affiliation(s)
- I Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
| | | | | | | | | | | |
Collapse
|
44
|
Kuramitsu S, Ebihara A, Kanagawa M, Nakagawa N, Masui R, Murayama K, Terada T, Shirouzu M, Miki K, Yokoyama S. Whole-cell project of Thermus ThermophilusHB8 toward atomic-resolution biology. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305098922] [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
|
45
|
Murayama K, Yamazaki T, Ito A, Uehara S, Sasaki N. Simplified semiquantitative culture using washed sputum from children with lower respiratory tract infections. J Clin Pathol 2005; 58:896. [PMID: 16049300 PMCID: PMC1770881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Affiliation(s)
- K Murayama
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - T Yamazaki
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - A Ito
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - S Uehara
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - N Sasaki
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| |
Collapse
|
46
|
Affiliation(s)
- K Murayama
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - T Yamazaki
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - A Ito
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - S Uehara
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| | - N Sasaki
- Department of Paediatrics, Saitama Medical School, Saitama, Japan 350-0495;
| |
Collapse
|
47
|
Amouri R, Driss A, Murayama K, Kefi M, Nishino I, Hentati F. Allelic heterogeneity of GNE gene mutation in two Tunisian families with autosomal recessive inclusion body myopathy. Neuromuscul Disord 2005; 15:361-3. [PMID: 15833430 DOI: 10.1016/j.nmd.2005.01.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [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: 07/27/2004] [Revised: 12/20/2004] [Accepted: 01/11/2005] [Indexed: 11/24/2022]
Abstract
Autosomal recessive hereditary inclusion body myopathy (AR-HIBM), with sparing of the quadriceps, is characterized by adult-onset, with weakness and atrophy of distal lower limb muscles, and typical histopathological findings in muscle biopsy. AR hIBM is associated with mutations in the UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase (GNE) gene on chromosome 9p12-13 . We report two unrelated Tunisian families with clinical and pathological features of AR HIBM. One distinct homozygous GNE missense mutation, M712T, previously reported in Middle Eastern Jewish patients, and a newly identified one, L379H, were found in one patient from each family. We conclude that AR HIBM in Tunisia shows an allelic genetic heterogeneity.
Collapse
Affiliation(s)
- R Amouri
- Department of Molecular Neurobiology and Neuropathology, National Institute of Neurology, 1007 La Rabta, Tunis, Tunisia.
| | | | | | | | | | | |
Collapse
|
48
|
Kaneko T, Naoi F, Wada N, Murayama K, Kitazumi E. [Effectiveness of intrapulmonary percussive ventilator treatment for respiratory disorders in persons with severe motor and intellectual disabilities]. No To Hattatsu 2005; 37:262-4. [PMID: 15915745] [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] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
|
49
|
Ishikawa H, Sugie K, Murayama K, Awaya A, Suzuki Y, Noguchi S, Hayashi YK, Nonaka I, Nishino I. Ullrich disease due to deficiency of collagen VI in the sarcolemma. Neurology 2005; 62:620-3. [PMID: 14981181 DOI: 10.1212/01.wnl.0000113023.84421.00] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The authors identified eight patients with Ullrich disease in whom collagen VI was present in the interstitium but was absent from the sarcolemma. By electron microscopy, collagen VI in the interstitium was never linked to the basal lamina. These findings suggest that in these patients it is not the total absence of collagen VI from the muscle but the failure of collagen VI to anchor the basal lamina to the interstitium that is the cause of Ullrich disease. Only one of the patients had a mutation in the collagen VI gene, suggesting that the primary abnormality in most of the patients involved some other molecules.
Collapse
Affiliation(s)
- H Ishikawa
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Tomida M, Ishimaru JI, Murayama K, Kajimoto T, Kurachi M, Era S, Shibata T. Intra-articular oxidative state correlated with the pathogenesis of disorders of the temporomandibular joint. Br J Oral Maxillofac Surg 2004; 42:405-9. [PMID: 15336765 DOI: 10.1016/j.bjoms.2004.06.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/07/2004] [Indexed: 11/20/2022]
Abstract
We investigated the redox state of albumin in the synovial fluid from patients with temporomandibular joint (TMJ) disorders (TMD) to evaluate the relation between the cause of the TMD and the number of types of oxygen in synovial fluid. The albumin was fractionated into three components, human mercaptalbumin (HMA, reduced form) and two types human non-mercaptalbumin (HNA, oxidized form), by high-performance liquid chromatography (HPLC). The 63 patients were divided into three groups radiologically, and the ratios of the redox state of the synovial fluid in each group were compared. The fraction of HNA was significantly higher in patients with advanced disease than in patients with early disease. This indicates that the TMJ is affected by intra-articlular oxidative stress, and the severity of TMD correlates closely with the number of oxidative factors. Oxidative stress was thought to be responsible for the genesis of TMD.
Collapse
Affiliation(s)
- M Tomida
- Department of Physiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan.
| | | | | | | | | | | | | |
Collapse
|