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McMaster R, Adachi K, Yada H, Odachi R, Omura M, Cleary M. Exploration of Mental Health Issues of Students among University Health Science Academics in Japan. Issues Ment Health Nurs 2021; 42:862-869. [PMID: 33739236 DOI: 10.1080/01612840.2021.1894617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 10/21/2022]
Abstract
Academic educators in universities are well positioned to detect early signs and symptoms of unexplained behaviour change in students that could be the beginning of mental health issues. The purpose of this research was to explore the attitudes, beliefs, knowledge and practices of university academics in Japan towards health science students with psychological/mental health issues. This study used a qualitative descriptive design. Three focus groups using a semi-structured interview guide were conducted with 15 academics teaching health science students. Data were collected between March to October 2019. Themes revealed three areas of interest: 1) Reflection on mental health issues in Japan with sub-themes "family issues"; "society expectations and changes", and "stigma"; 2) Reflection on students' mental health issues with sub-themes "student behaviors", "staff involvement", "barriers encountered"; and, 3) Potential supports with sub-themes "university assistance", "communication and connection", and "interventions and prevention." The findings provide insight and can benefit student populations across diverse cultural university settings. Further research to investigate academic staff support with early recognition of mental ill-health and ability to provide information and advice to students is warranted. Recommendations include mental health education for academics and for students to encourage healthy university campuses and well-being within the community.
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Affiliation(s)
- R McMaster
- School of Nursing, College of Health and Medicine, University of Tasmania, Sydney, New South Wales, Australia
| | - K Adachi
- Faculty of Health Sciences, Graduate School of Medicine, Yamaguchi University, Japan
| | - H Yada
- Faculty of Health Sciences, Graduate School of Medicine, Yamaguchi University, Japan
| | - R Odachi
- Graduate School of Medicine, Osaka University, Osaka, Japan
| | - M Omura
- School of Nursing and Midwifery, College of Health and Medicine, and Wellbeing, University of Newcastle, Callaghan, New South Wales, Australia
| | - M Cleary
- School of Nursing, College of Health and Medicine, University of Tasmania, Sydney, New South Wales, Australia
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Sato A, Omura M, Minagawa Y, Takino K, Matsui K, Hongo H, Shirata R, Hashimoto H, Misumi T, Sasaki Y, Inoue T, Hata M. PO-1258: Intensity modulated radiation therapy for lymph node oligo-recurrence. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01276-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Omura M, Stone TE, Petrini MA, Cao R. Nurses' health beliefs about paper face masks in Japan, Australia and China: a qualitative descriptive study. Int Nurs Rev 2020; 67:341-351. [PMID: 32686094 PMCID: PMC7404493 DOI: 10.1111/inr.12607] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/04/2020] [Accepted: 06/09/2020] [Indexed: 12/23/2022]
Abstract
Aim To explore the health beliefs of clinical and academic nurses from Japan, Australia and China regarding wearing paper masks to protect themselves and others, and to identify differences in participants' health beliefs regarding masks. Background The correct use of face masks and consensus among health professionals across the globe is essential for containing pandemics, and nurses need to act according to policy to protect themselves, educate the public and preserve resources for frontline health workers. Paper masks are worn by health professionals and the general public to avoid the transmission of respiratory infections, such as COVID‐19, but there appear to be differences in health beliefs of nurses within and between countries regarding these. Methods This qualitative descriptive study used content analysis with a framework approach. Findings There were major differences in nurse participants’ beliefs between and within countries, including how nurses use paper masks and their understanding of their efficacy. In addition, there were cultural differences in the way that nurses use masks in their daily lives and nursing practice contexts. Conclusion Nurses from different working environments, countries and areas of practice hold a variety of health beliefs about mask wearing at the personal and professional level. Implications for nursing policy and health policy The COVID‐19 pandemic has sparked much discussion about the critical importance of masks for the safety of health professionals, and there has been considerable discussion and disagreement about health policies regarding mask use by the general public. Improper use of masks may have a role in creating mask shortages or transmitting infections. An evidence‐based global policy on mask use for respiratory illnesses for health professionals, including nurses, and the general public needs to be adopted and supported by a wide‐reaching education campaign.
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Affiliation(s)
- M Omura
- Faculty of Health and Medicine, School of Nursing and Midwifery, The University of Newcastle, Callaghan, NSW, Australia
| | - T E Stone
- Faculty of Health and Medicine, School of Nursing and Midwifery, The University of Newcastle, Callaghan, NSW, Australia.,Faculty of Medicine and Health Sciences, Yamaguchi University, Ube City, Japan
| | - M A Petrini
- Faculty of Nursing, Chiang Mai University, Mueang Chiang Mai District, Chiang Mai, Thailand
| | - R Cao
- Nursing Department, Zhongnan Hospital of Wuhan University, Wuhan, China
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Abstract
Recently, Japanese wine law has changed dramatically. In October 2015, the definition of “Japan wine” and the labelling rules were introduced, and the registration guidelines for the geographical indication (GI) were formulated. Up to now, the Commissioner of the National Tax Agency has designated two wine GIs: “Yamanashi” and “Hokkaido”. However, it is not easy for Japanese consumers to understand the value and the role of GI. The National Tax Agency, prefectures, municipal authorities and winery associations organise from time to time promotional events of GI wines to spread the notion of GI. Even though the majority of “Japan wine”, including GI wine, is consumed in the internal market, it is necessary to protect the Japanese GIs in foreign countries. Due to the EU-Japan EPA that ensures the mutual protection of GIs, it is quite probable that the GI will play an important role in the export of Japanese wine, liquor and agricultural products.
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Kubota M, Harada Y, Saitoh H, Yamaguchi C, Omura M. Longitudinal nutritional assessment in hospitalized patients with head and neck cancer. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hata M, Wada H, Ogino I, Omura M, Koike I, Tayama Y, Odagiri K, Kasuya T, Aihara M, Inoue T. PO-0761: Radiation therapy for angiosarcoma of the scalp: total scalp irradiation with X-rays and electrons. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32011-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hongo H, Nagata H, Omura M, Matsui K, Tayama Y, Takano S, Yoshida M, Sakae T. EP-1641: Effectiveness of dose reduction in rectum for prostate cancer using helical radiation in Tomotherapy. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)41633-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mukai Y, Hata M, Mitsudo K, Koike I, Koizumi T, Oguri S, Kioi M, Omura M, Tohnai I, Inoue T. EP-1112: Radiation therapy with concurrent superselective intra-arterial chemotherapy for gingival carcinoma. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31230-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Mukai Y, Hata M, Mitsudo K, Koike I, Koizumi T, Oguri S, Kioi M, Omura M, Tohnai I, Inoue T. Radiation therapy with concurrent retrograde superselective intra-arterial chemotherapy for gingival carcinoma. Strahlenther Onkol 2013; 190:181-5. [PMID: 24264464 DOI: 10.1007/s00066-013-0468-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 09/16/2013] [Indexed: 11/30/2022]
Abstract
PURPOSE The aim of this study was to review the efficacy and toxicity of radiation therapy with concurrent retrograde superselective intra-arterial chemotherapy in the treatment of gingival carcinoma. METHODS AND MATERIALS In all, 34 patients (21 men and 13 women) with squamous cell carcinoma of the gingiva underwent radiation therapy with concurrent retrograde superselective intra-arterial chemotherapy. Treatment consisted of daily external irradiation and concurrent retrograde superselective intra-arterial infusion with cisplatin and docetaxel. A median total dose of 60 Gy in 30 fractions was delivered to tumors. RESULTS Of the 34 patients, 29 (85 %) achieved a complete response (CR) and 5 had residual tumors. Of the 29 patients with a CR, 2 had local recurrences and 1 had distant metastasis 1-15 months after treatment. Twenty-six of the 36 patients had survived at a median follow-up time of 36 months (range 12-79 months); 4 died of cancer and 4 died of non-cancer-related causes. At both 3 and 5 years after treatment, the overall survival rates were 79 % and the cause-specific survival rates were 85 %. Osteoradionecrosis of the mandibular bone only developed in 1 patient after treatment. CONCLUSION Radiation therapy with concurrent retrograde superselective intra-arterial chemotherapy was effective and safe in the treatment of gingival carcinoma. This treatment may be a promising curative and organ-preserving treatment option for gingival carcinoma.
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Affiliation(s)
- Y Mukai
- Department of Radiology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, 236-0004, Kanazawa-ku, Yokohama, Kanagawa, Japan,
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Tagami T, Kushimoto S, Tosa R, Omura M, Hagiwara J, Hirama H, Yokota H. The precision of PiCCO®measurements in hypothermic post-cardiac arrest patients. Anaesthesia 2012; 67:236-43. [DOI: 10.1111/j.1365-2044.2011.06981.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tagami T, Tosa R, Omura M, Yokota H, Hirama H. Implementation of the fifth link of the Chain of Survival concept for out-of-hospital cardiac arrest. Crit Care 2012. [PMCID: PMC3363684 DOI: 10.1186/cc10873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Hata M, Omura M, Miyagi E, Koike I, Numazaki R, Asai-Sato M, Tayama Y, Ogino I, Hirahara F, Inoue T. The Role of Radiation Therapy for Stage IVB Uterine Cervical Cancer. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Tagami T, Tosa R, Omura M, Hagiwara J, Kido N, Hirama H, Yokota H. Impact of cardiac arrest duration on extravascular lung water and pulmonary vascular permeability in patients with postcardiac arrest syndrome: a prospective observational study. Crit Care 2011. [PMCID: PMC3061770 DOI: 10.1186/cc9560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Odagiri K, Omura M, Hata M, Aida N, Niwa T, Ito S, Kigasawa H, Adachi M, Inoue T. Endocrinopathies in Intracranial Germ Cell Tumor Patients Treated with Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Seike M, Furuya K, Omura M, Hamada-Watanabe K, Matsushita A, Ohtsu H. Histamine H(4) receptor antagonist ameliorates chronic allergic contact dermatitis induced by repeated challenge. Allergy 2010; 65:319-26. [PMID: 19886918 DOI: 10.1111/j.1398-9995.2009.02240.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [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: 11/28/2022]
Abstract
BACKGROUND The present study observed effects of the histamine H(4) receptor on chronic allergic contact dermatitis induced by repeated challenge in mice. METHODS Acute contact dermatitis was induced by single epicutaneous challenge of 2,4,6-trinitro-1-chlorobenzene (TNCB) to the ear. Chronic allergic contact dermatitis was developed by repeated epicutaneous challenge using TNCB on the dorsal back skin. H(4) receptor antagonist JNJ7777120 was administered to wild-type mice, while H(4) receptor agonist 4-methylhistamine was administered to histidine decarboxylase (HDC) (-/-) mice that synthesized no histamine. RESULTS HDC (-/-) mice did not differ phenotypically from HDC (+/+) mice, and H(4) receptor antagonist/agonist did not have clinical effects in terms of acute contact dermatitis reactions. H(4) receptor antagonist ameliorated skin eczematous lesions induced by repeated TNCB challenge in HDC (+/+) mice. On the contrary, H(4) receptor agonist exacerbated skin lesions exclusively in HDC (-/-) mice. Application of H(4) receptor agonist induced migration of mast cells and eosinophils in skin lesions, and H(4) receptor antagonist suppressed these changes. H(4) receptor was immunohistochemically detected on mast cells in eczematous lesions. Levels of interleukin (IL)-4, -5, and -6 in lesions were decreased, whereas levels of interferon-gamma and IL-12 were increased by H(4) receptor antagonistic activity. Serum Immunoglobulin E levels rapidly increased with repeated challenge, but decreased with H(4) receptor antagonist. CONCLUSION Because chronic allergic contact dermatitis is developed by H(4) receptor stimulation, H(4) receptor antagonists might represent new candidate drugs for treating chronic allergic contact dermatitis.
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MESH Headings
- Animals
- Chemotaxis, Leukocyte/immunology
- Chronic Disease
- Cytokines/biosynthesis
- Dermatitis, Allergic Contact/drug therapy
- Dermatitis, Allergic Contact/immunology
- Dermatitis, Allergic Contact/metabolism
- Enzyme-Linked Immunosorbent Assay
- Female
- Histamine Agonists/pharmacology
- Histamine Antagonists/pharmacology
- Immunohistochemistry
- Mice
- Mice, Inbred C57BL
- Picryl Chloride/immunology
- Picryl Chloride/toxicity
- Receptors, G-Protein-Coupled/immunology
- Receptors, G-Protein-Coupled/metabolism
- Receptors, Histamine/immunology
- Receptors, Histamine/metabolism
- Receptors, Histamine H4
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Affiliation(s)
- M Seike
- Department of Food and Nutrition Science, Sagami Women's Junior College, Bunkyo, Sagamihara, Kanagawa, Japan
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Tagami T, Tosa R, Hirama H, Yonezawa K, Omura M, Akiyama G, Masuno T, Yamamoto Y, Kushimoto S, Yokota H. A prospective pilot study of the effect of neutrophil elastase on the pulmonary vascular permeability in patients with pneumonia. Crit Care 2010. [PMCID: PMC2934490 DOI: 10.1186/cc8411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Hata M, Ogino I, Omura M, Koike I, Kurihara S, Tayama Y, Odagiri K, Minagawa Y, Inoue T. Radiation Therapy for Primary Mucosa-associated Lymphoid Tissue (MALT) Lymphoma of the Orbit. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Furuya K, Omura M, Kudo S, Sugiura W, Azuma H. Recognition profiles of microsporidian Encephalitozoon cuniculi polar tube protein 1 with human immunoglobulin M antibodies. Parasite Immunol 2008; 30:13-21. [PMID: 18086012 DOI: 10.1111/j.1365-3024.2007.00988.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microsporidian Encephalitozoon cuniculi has a unique organelle called a polar tube (PT), the extrusion of which is absolutely required to invade a host cell. We recently detected anti-E. cuniculi PT immunoglobulin (Ig) M antibodies in sera from many healthy individuals. The present one-dimensional (1-D) immunoblot analysis predominantly detected a band at 52 kDa in all of the examined human sera with anti-PT IgM. The use of mouse monoclonal antibody confirmed that the 52-kDa band detected in 1-D immunoblots was an antigen derived from the PT, which represents a glycoprotein nature. In addition, from changes in the immunoreactivity of the 52-kDa band before and after treatment with NaOH, we determined that the 24 human serum samples with anti-PT IgM activities could be roughly grouped into three types: (i) sera containing antibodies against only a saccharic determinant (n=3); (ii) sera containing antibodies against only a proteinic determinant (n=11); and (iii) sera showing dual recognition of saccharic and proteinic determinants (n=10). Further two-dimensional (2-D) immunoblot analysis followed by proteomic analysis confirmed that human sera with anti-PT IgM reacted with E. cuniculi polar tube protein 1 (PTP1). Such circulating IgM antibodies may be important in the first line of defence against E. cuniculi infection.
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Affiliation(s)
- K Furuya
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo, Japan.
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Omura M, Qin CY, Ohtani H, Iwasaki R, Shigeno Y, Yu JS, Nakazawa S. Networking possibilities for waste recycling in Miyagi prefecture, Japan. Waste Manag 2007; 27:711-9. [PMID: 16987646 DOI: 10.1016/j.wasman.2006.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2005] [Revised: 04/23/2006] [Accepted: 06/30/2006] [Indexed: 05/11/2023]
Abstract
Successful case studies for waste recycling in Japan have not been evaluated. The evaluation of economic efficiency and environmental effects were lacking at the time the actual network was established. A waste/resource input/output (I/O) coincidence retrieval system called ZENESYS was developed to examine the usefulness of a waste-exchange network in a nonmanufacturing district. We analyzed data from the Miyagi prefecture, a region without heavy industry. The data were collected from 77 companies using a questionnaire and interviews. A total of 33 possible waste exchange links arose after analysis using ZENESYS. However, these were frail networks that relied heavily on the construction industry. Two waste recycling technologies were selected from the ZENESYS database: reclaiming fuel from waste plastic and making construction materials from bottom ash. Evaluation of the environmental effects and economics of these two technologies showed they were both suitable for the environment, but no profit was made from reclaiming fuel from waste plastics. We concluded that in an area with no heavy industry, it may be difficult to adopt recycling technologies that have high environmental and economic performance. Materials are difficult to circulate among manufacturing industries even if a waste-exchange network exists, and resources are consumed during transportation and recycling.
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Affiliation(s)
- M Omura
- Graduate School of Agricultural Science, Tohoku University, 1-1 Amemiya Aoba-ku, Sendai, Miyagi, Japan.
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Omura M, Miyake Y, Hasegawa T, Ueki K, Sato O, Haghighat A, Sjoden GE. Performance of the improved version of monte Carlo code A3MCNP for large-scale shielding problems. Radiat Prot Dosimetry 2005; 116:493-7. [PMID: 16604685 DOI: 10.1093/rpd/nci160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A3MCNP (Automatic Adjoint Accelerated MCNP) is a revised version of the MCNP Monte Carlo code, which automatically prepares variance reduction parameters for the CADIS (Consistent Adjoint Driven Importance Sampling) methodology. Using a deterministic 'importance' (or adjoint) function, CADIS performs source and transport biasing within the weight-window technique. The current version of A3MCNP uses the three-dimensional (3-D) Sn transport TORT code to determine a 3-D importance function distribution. Based on simulation of several real-life problems, it is demonstrated that A3MCNP provides precise calculation results with a remarkably short computation time by using the proper and objective variance reduction parameters. However, since the first version of A3MCNP provided only a point source configuration option for large-scale shielding problems, such as spent-fuel transport casks, a large amount of memory may be necessary to store enough points to properly represent the source. Hence, we have developed an improved version of A3MCNP (referred to as A3MCNPV) which has a volumetric source configuration option. This paper describes the successful use of A3MCNPV for a concrete cask neutron and gamma-ray shielding problem, and a PWR dosimetry problem.
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Affiliation(s)
- M Omura
- Mitsubishi Heavy Industries, Yokohama 220-8401, Japan.
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Naya Y, Nagata M, Ichikawa T, Amakasu M, Omura M, Nishikawa T, Yamaguchi K, Ito H. Laparoscopic adrenalectomy: comparison of transperitoneal and retroperitoneal approaches. BJU Int 2002; 90:199-204. [PMID: 12133053 DOI: 10.1046/j.1464-410x.2002.02845.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To compare the effectiveness and efficiency of transperitoneal anterior laparoscopic adrenalectomy with that of retroperitoneal posterior laparoscopic adrenalectomy. PATIENTS AND METHODS A retrospective comparison was undertaken of 28 patients who underwent transperitoneal anterior laparoscopy with 22 patients who underwent retroperitoneal posterior laparoscopy between April 1994 and November 2000. There were 18 men and 32 women (mean age 51.0 years, range 23-68) with varying diagnoses. Of the 50 patients, 31 had primary aldosteronism, eight had Cushing's syndrome, three had phaeochromocytoma, one had an 18-hydroxydeoxycorticosterone-induced adenoma and seven had non-functioning adrenal adenoma. Adrenal tumours were confirmed by hormonal assays, biochemical tests and computed tomography. To determine the site of the functioning adenoma, hormones were assayed from adrenal vein sampling. Thirty adrenal tumours were located on the right and 20 on the left. RESULTS There were no significant differences in general demographic variables between the transperitoneal and retroperitoneal groups. The mean duration of surgery for transperitoneal and retroperitoneal laparoscopy was 202 and 221 min, respectively, and the mean blood loss 113 and 192 mL, respectively. The time to first oral intake, days to full diet, time until ambulatory and duration of hospitalization did not differ significantly between the two approaches. As the body mass index increased, the duration of surgery increased for both approaches. As more procedures were performed the duration of surgery decreased for both approaches. CONCLUSIONS There were no significant differences between the transperitoneal and retroperitoneal approaches for laparoscopic adrenalectomy.
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Affiliation(s)
- Y Naya
- Department of Urology, Yokohama Rosai Hospital, Yokohama, Japan.
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Carr KD, Yamamoto N, Omura M, Cabeza de Vaca S, Krahne L. Effects of the D(3) dopamine receptor antagonist, U99194A, on brain stimulation and d-amphetamine reward, motor activity, and c-fos expression in ad libitum fed and food-restricted rats. Psychopharmacology (Berl) 2002; 163:76-84. [PMID: 12185403 DOI: 10.1007/s00213-002-1132-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2001] [Accepted: 04/22/2002] [Indexed: 10/27/2022]
Abstract
RATIONALE Previous studies indicate that the D(3) dopamine (DA) receptor is preferentially expressed in limbic forebrain DA terminal areas and may mediate functional effects opposite those of the D(1) and D(2) receptor types. However, the locations of the D(3) receptors that regulate behavior, and the range of behavioral functions regulated, are not clear. OBJECTIVE The objective of this study was to evaluate behavioral and cellular effects of the preferential D(3) dopamine receptor antagonist, U99194A. METHODS In experiment 1, the rewarding effect of U99194A (5.0, 10.0 and 20.0 mg/kg, SC) was measured in terms of its ability to lower the threshold for lateral hypothalamic self-stimulation (LHSS) in ad libitum fed rats. To amplify a possibly weak reward signal, testing was also conducted in food-restricted rats. The ability of U99194A to alter the threshold-lowering effect of d-amphetamine was also assessed. In experiment 2, effects of U99194A on horizontal and vertical motor activity were compared in ad libitum fed and food-restricted rats. In experiment 3, effects of a behaviorally active dose of U99194A (5.0 mg/kg) on brain c-fos expression were measured and compared to those produced by d-amphetamine (0.5 mg/kg, IP). In experiment 4, the motor and cellular activating effects of U99194A were challenged with the D(1) dopamine receptor antagonist, SCH-23390 (0.1 mg/kg). RESULTS U99194A displayed no rewarding efficacy in the LHSS paradigm. U99194A did, however, augment the rewarding effect of d-amphetamine. U99194A also produced a motor activating effect, reversible by SCH-23390, which was greater in food-restricted than ad libitum fed rats. The pattern and intensity of fos-like immunoreactivity (FLI) induced by U99194A was similar to that produced by d-amphetamine and was blocked, in caudate-putamen and nucleus accumbens, by SCH-23390. CONCLUSIONS These results indicate that U99194A has psychostimulant-like effects on motor activity and striatal c-fos expression that are dependent upon the D(1) DA receptor. However, doses of U99194A that are adequate to stimulate motor activity and c-fos expression in striatal and limbic structures do not possess direct rewarding effects in the LHSS paradigm. Overall, these results seem consistent with the hypothesis that D(3) antagonism enhances D(1)/D(2) mediated signaling with behavioral effects dependent on both the density of D(3) receptors and the prevailing level of DA transmission in particular brain regions.
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Affiliation(s)
- K D Carr
- Department of Pharmacology, New York University School of Medicine, 550 First Avenue, New York, NY 10016, USA.
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Hata M, Ogino I, Aida N, Saito K, Omura M, Kigasawa H, Toyoda Y, Tachibana K, Matsubara S, Inoue T. Prophylactic cranial irradiation of acute lymphoblastic leukemia in childhood: outcomes of late effects on pituitary function and growth in long-term survivors. Int J Cancer 2002; 96 Suppl:117-24. [PMID: 11992395 DOI: 10.1002/ijc.10348] [Citation(s) in RCA: 28] [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] [Indexed: 11/09/2022]
Abstract
It is well known that prophylactic cranial irradiation is highly effective in preventing central nervous system (CNS) relapse of acute lymphoblastic leukemia (ALL). Nevertheless, there have been very few reports on the late effects, especially pituitary function and growth, in long-term survivors who were treated with 18 Gy cranial irradiation in childhood. The subjects consisted of 35 children with ALL who were treated with prophylactic 18 Gy cranial irradiation at Kanagawa Children's Medical Center between October 1981 and February 1995. All patients received cranial irradiation after first attaining complete remission with induction chemotherapy, according to the treatment protocols prescribed by the Tokyo Children's Leukemia Study Group (TCLSG) and Tokyo Children's Cancer Study Group (TCCSG). Their ages at the time of cranial irradiation ranged from 2.2-15.0 years (mean 6.8). We evaluated their pituitary functions by measuring their pituitary hormone values 0.7-11.3 years (mean 6.0) after cranial irradiation and their growth by analyzing their height standard deviation score (SDS) at diagnosis of ALL and their final height SDS at the mean follow-up period of 8.2 years after cranial irradiation. Height SDS is defined as the difference between the patient's height and the mean height of their age and sex, divided by the standard deviation of their age and sex. Eight of 35 patients had ALL relapse, involving the bone marrow in seven patients and the CNS in only one. Six of the eight patients with relapse died 1.5-6.6 years after cranial irradiation and the other two patients were salvaged by further intensive therapies. The remaining 27 relapse-free patients have survived for 1.4-15.8 years (mean 10.1) after cranial irradiation. Twenty-six of the 29 survivors are long-term survivors of more than 5 years. Although there was one patient with an abnormal result in each value of growth hormone (GH), adrenocorticotropic hormone (ACTH), and prolactin (PRL), and two patients with abnormal results in thyroid-stimulating hormone (TSH) values, none of the patients had clinical symptoms of pituitary hormone abnormality and none required hormone supplements. The final height SDS decreased significantly compared with the height SDS at diagnosis of ALL in the long-term survivors (P = 0.001) and the height SDS of the patients who had received cranial irradiation at a young age tended to decrease gradually (P = 0.019). However, no patient showed severe growth failure. It is considered that prophylactic 18 Gy cranial irradiation plus chemotherapy for ALL in childhood can effectively prevent CNS relapse and is unlikely to produce clinically significant late effects, although it may cause slight pituitary hormone abnormality.
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Affiliation(s)
- M Hata
- Department of Radiology, Yokohama City University, School of Medicine, Yokohama, Japan.
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25
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Abstract
Interleukin-10 (IL-10) is known to be an anti-inflammatory cytokine which inhibits cell growth and cytokine production of both Th1 and Th2 cells. Using a human IL-10 ELISA kit we investigated whether serum IL-10 levels increased during the acute and convalescent stages in 45 children with rubella infections. Serum levels of IL-10 were markedly elevated in rubella patients during the acute stage, compared with those at the convalescent stage and those in healthy age-matched children (mean +/- SEM): 18.5 +/- 3.4 vs. 6.0 +/- 0.6 vs. 7.9 +/- 1.3 pg/ml. IL-10 levels determined 5 d after the onset of the disease had returned to the normal range. In patients with rubella, there were significant negative correlations between serum IL-10 levels and both rubella virus-specific IgM and IgG antibodies. These findings suggest that IL-10 may play a role in the pathogenesis of acute rubella infections.
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Affiliation(s)
- I Akaboshi
- Akaboshi Pediatric Clinic, Kumamoto, Japan
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26
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Nemoto S, Omura M, Takatsuki S, Sasaki K, Toyoda M. [Determination of 2,4,6-tri-tert-butylphenol and related compounds in foods]. Shokuhin Eiseigaku Zasshi 2001; 42:359-66. [PMID: 11875820 DOI: 10.3358/shokueishi.42.359] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An analytical method has been developed for the determination of 2,4,6-tri-tert-butylphenol (TTBP) in foods. TTBP was determined by GC/MS (SIM) after extraction from food samples using a steam distillation technique. The developed method was able to determine simultaneously 2,4-di-tert-butylphenol (2,4-DTBP), 2,6-di-tert-butylphenol (2,6-DTBP), 3,5-di-tert-butylphenol (3,5-DTBP) and 2,4-di-tert-pentylphenol (2,4-DTPP). The method was applied to analyze the residues of the 5 phenolic compounds in 101 food samples purchased from markets. TTBP was found in some samples of meat, liver and fish (muscle) at the levels of trace (tr)-0.50 ng/g, tr and tr-1.83 ng/g, respectively. 2,4-DTBP was found in some samples of vegetables, meat, liver, fish (muscle) and fish (viscera) at the levels of 1.4-10.6 ng/g, 2.7-26.4 ng/g, tr-34.2 ng/g, tr-21.6 ng/g and tr, respectively. 2,6-DTBP was found in some samples of fish (muscle) and fish (viscera) at the levels of tr-3.9 ng/g and tr, respectively. 3,5-DTBP and 2,4-DTPP were not found in any of the analyzed samples.
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Affiliation(s)
- S Nemoto
- National Institute of Health Sciences: 1-18-1, Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
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27
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Omura M, Ogata R, Kubo K, Shimasaki Y, Aou S, Oshima Y, Tanaka A, Hirata M, Makita Y, Inoue N. Two-generation reproductive toxicity study of tributyltin chloride in male rats. Toxicol Sci 2001; 64:224-32. [PMID: 11719705 DOI: 10.1093/toxsci/64.2.224] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [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: 11/13/2022] Open
Abstract
A 2-generation reproductive toxicity study of tributyltin chloride (TBTCl) was conducted in male rats using dietary concentrations of 5, 25, and 125 ppm TBTCl to evaluate its effect on sexual development and the reproductive system. F1 males were killed on postnatal day 119 and F2 males were killed on postnatal day 91. TBTCl affected the male reproductive system of rats. The weights of the testis and epididymis were decreased and homogenization-resistant spermatid and sperm count were reduced mainly in the 125 ppm TBTCl group. Histopathologic changes were also observed in the testis of this group and included vacuolization of the seminiferous epithelium, spermatid retention, and delayed spermiation. However, the changes were minimal in nature. The weight of the ventral prostate was decreased to 84% of the control value in the 125 ppm group in the F1 generation and decreased to 84 and 69% of the control value in the 25 ppm and 125 ppm TBTCl groups, respectively, in the F2 generation. The serum 17beta-estradiol concentration was also decreased to 55% of the control value in the 125 ppm group in the F1 generation and decreased to 78 and 57% of the control value in the 25 ppm and 125 ppm TBTCl groups, respectively, in the F2 generation. However, the serum concentrations of luteinizing hormone (LH) and testosterone were not decreased in these groups. These changes corresponded with those caused by aromatase inhibition and therefore TBTCl might be a weak aromatase inhibitor in male rats.
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Affiliation(s)
- M Omura
- Department of Hygiene, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
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28
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Ogawa K, Kawasaki A, Omura M, Yoshida T, Ikoma Y, Yano M. 3',5'-Di-C-beta-glucopyranosylphloretin, a flavonoid characteristic of the genus Fortunella. Phytochemistry 2001; 57:737-742. [PMID: 11397442 DOI: 10.1016/s0031-9422(01)00132-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Dihydrochalcone derivative, 3',5'-di-C-beta-glucopyranosylphloretin (1), is present in the genus Fortunella, (F. crassifolia, F. japonica, F. margarita, F. polyandra and F. hindsii). These species accumulate a large quantity of 1 in their fruits (peel, 6.5-15.2 mg/g in dry wt; juice sac, 1.5-10.5 mg/g) and in their leaves (21.3-60.2 mg/g). Twenty-seven Tanaka's Citrus species examined lack 1, but C. madurensis and C. halimii contain 1 in large quantities in their peels (25.1 and 33.6 mg/g) and juice sacs (4.1 and 4.2 mg/g). Poncirus species do not contain 1. Fortunella-citrus hybrids, the Orangequat [C. unshiuxF. crassifolia], the Thomasville citrangequat [Fortunella sp.x(C. sinensisxPoncirus trifoliata)], and seven hybrid progenies [F. margaritaxC. junos], contain large amounts of 1 in their peels (17.0-7.9 mg/g) and juice sacs (2.0-9.9 mg/g). These facts suggest that accumulation of 1 is a generic trait of the genus Fortunella and that the inheritance of the trait among the intergeneric hybrids is controlled by a dominant allele. Thus C. madurensis and C. halimii are thought to originate from natural hybrids between the genera Citrus and Fortunella. Phloridzin, which has the same aglycon as 1, was not detected in the citrus plants examined.
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Affiliation(s)
- K Ogawa
- Okinawa Subtropical Station, Japan International Research Center for Agricultural Science, Ministry of Agriculture, Forestry, and Fishery, 1091-1, Maezato, Ishigaki, Okinawa 907-0002, Japan.
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Omura M. [Onset of spermatogenesis is accelerated by a gestational administration of 1,2,3,4,6,7-hexachlorinated naphthalene in male rat offspring]. Fukuoka Igaku Zasshi 2001; 92:251-7. [PMID: 11681275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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30
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Furuta T, Une Y, Omura M, Matsutani N, Nomura Y, Kikuchi T, Hattori S, Yoshikawa Y. Horizontal transmission of Toxoplasma gondii in squirrel monkeys (Saimiri sciureus). Exp Anim 2001; 50:299-306. [PMID: 11515092 DOI: 10.1538/expanim.50.299] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [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: 10/31/2022] Open
Abstract
The possibility of horizontal transmission of T. gondii was examined in squirrel monkeys. After three monkeys were inoculated perorally with 1.1-2.1 x 10(3) cysts of the T. gondii ME49, the animals were divided into two cages and maintained with one normal monkey for each cage as a cagemate. Two out of the three T. gondii-inoculated monkeys died, and the remaining one monkey was sacrificed in a moribund state one week after infection because of acute toxoplasmosis. Many T. gondii tachyzoites were recovered from broncho-alveolar lavages and were also found histopathologically in the lung, liver, spleen, kidney and lymph nodes and impression smears of tissues from the three T. gondii-inoculated monkeys by Giemsa staining. Anti-T. gondii antibody was examined by immunoblot assay in these animals, and the antibody to T. gondii major surface membrane protein (p30) could be detected after the start of experiment. Furthermore, a specific band of T. gondii NTPase gene was observed by PCR in the liver and lung of infected and cagemate monkeys, and the sequence of the second PCR products obtained from the cagemates, which were clinically normal but gave a positive result in immunoblotting assay, was exactly the same as the sequence of the NTPase gene of T. gondii ME49. These findings suggested that transmission of T. gondii from the infected monkeys to cagemates occurred easily, and since many T. gondii tachyzoites were recovered from the bronchoalveolar lavages of the three T. gondii-inoculated monkeys, we suggest that aerosol infection plays an important role for the enzootic toxoplasmosis in colonies of squirrel monkeys.
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Affiliation(s)
- T Furuta
- Devision of Infections Genetics, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
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Kita M, Komatsu A, Omura M, Yano M, Ikoma Y, Moriguchi T. Cloning and expression of CitPDS1, a gene encoding phytoene desaturase in citrus. Biosci Biotechnol Biochem 2001; 65:1424-8. [PMID: 11471748 DOI: 10.1271/bbb.65.1424] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A cDNA clone encoding phytoene desaturase (PDS) was isolated from citrus (Citrus unshiu Marc.). The transcript of the isolated PDS (CitPDS1) was not detected by conventional RNA gel-blot analysis; instead, it was detected by a sensitive reverse transcription-PCR (RT-PCR). The CitPDS1 transcript in the juice sacs/segment epidermis (edible part) was at a low level in the young fruit, and it increased toward maturation like citrus phytoene synthase (CitPSY1). In the peel, in contrast to CitPSY1, the transcript of which was induced toward maturation, the level of the CitPDS1 transcript remained constant after an increase in July, indicating non-coordinate regulation of CitPDS1 and CitPSY1 in the peel.
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Affiliation(s)
- M Kita
- Department of Citriculture, National Institute of Fruit Tree Science, Shimizu, Shizuoka, Japan
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32
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Ogata R, Omura M, Shimasaki Y, Kubo K, Oshima Y, Aou S, Inoue N. Two-generation reproductive toxicity study of tributyltin chloride in female rats. J Toxicol Environ Health A 2001; 63:127-144. [PMID: 11393799 DOI: 10.1080/15287390151126469] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A two-generation reproductive toxicity study of the effects of tributyltin chloride (TBTCl) was conducted in female rats using dietary concentrations of 5, 25, and 125 ppm TBTCl. Reproductive outcomes of dams (number and body weight of pups and the percentage of live pups) and the growth of female pups (the day of eye opening and body weight gain) were significantly decreased in the 125 ppm TBTCl group. A delay in vaginal opening and impaired estrous cyclicity were also observed in the 125 ppm TBTCl group. However, an increase in anogenital distance was found in all TBTCl groups on postnatal d 1. A dose-effect relationship was observed in TBTCl-induced changes in anogenital distance. These results indicate that the whole-life exposure to TBTCl affects the sexual development and reproductive function of female rats. In addition, the TBTCl-induced increase in anogenital distance seems to suggest it may exert a masculinizing effect on female neonates. However, the concentrations of TBTCl used in this study are not environmentally relevant.
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Affiliation(s)
- R Ogata
- Department of Hygiene, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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33
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Kubo K, Arai O, Ogata R, Omura M, Hori T, Aou S. Exposure to bisphenol A during the fetal and suckling periods disrupts sexual differentiation of the locus coeruleus and of behavior in the rat. Neurosci Lett 2001; 304:73-6. [PMID: 11335058 DOI: 10.1016/s0304-3940(01)01760-8] [Citation(s) in RCA: 132] [Impact Index Per Article: 5.7] [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: 10/18/2022]
Abstract
This study tested the effect of exposure to bisphenol A (BPA) early in life on the sexual differentiation in the brain and behavior in Wistar rats. We administered BPA only to mother rats during pregnancy and lactation at a dosage of approximately 1.5 mg/kg per day far less than the no-observed-adverse-effect level (NOAEL; 50 mg/kg per day). Control female offspring showed a higher activity, a lower avoidance memory, and larger locus coeruleus than the male controls, while the BPA-exposed group did not show any sexual dimorphism. BPA did not affect the reproductive organs or sex hormones. Our results suggest that the current methods to determine the NOAEL of artificial industrial chemicals may not be sufficient to detect a disruption of the sexual differentiation in the brain.
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Affiliation(s)
- K Kubo
- Department of Integrative Physiology, Graduate School of Medical Sciences, Kyushu University 60, 812-8582, Fukuoka, Japan
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Omura M, Kobayashi S, Mizukami Y, Mogami K, Todoroki-Ikeda N, Miyake T, Matsuzaki M. Eicosapentaenoic acid (EPA) induces Ca(2+)-independent activation and translocation of endothelial nitric oxide synthase and endothelium-dependent vasorelaxation. FEBS Lett 2001; 487:361-6. [PMID: 11163359 DOI: 10.1016/s0014-5793(00)02351-6] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.1] [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: 02/07/2023]
Abstract
Eicosapentaenoic acid (EPA), but not its metabolites (docosapentaenoic acid and docosahexaenoic acid), stimulated nitric oxide (NO) production in endothelial cells in situ and induced endothelium-dependent relaxation of bovine coronary arteries precontracted with U46619. EPA induced a greater production of NO, but a much smaller and more transient elevation of intracellular Ca(2+) concentration ([Ca(2+)]i), than did a Ca(2+) ionophore (ionomycin). EPA stimulated NO production even in endothelial cells in situ loaded with a cytosolic Ca(2+) chelator 1,2-bis-o-aminophenoxythamine-N',N',N'-tetraacetic acid, which abolished the [Ca(2+)]i elevations induced by ATP and EPA. The EPA-induced vasorelaxation was inhibited by N(omega)-nitro-L-arginine methyl ester. Immunostaining analysis of endothelial NO synthase (eNOS) and caveolin-1 in cultured endothelial cells revealed eNOS to be colocalized with caveolin in the cell membrane at a resting state, while EPA stimulated the translocation of eNOS to the cytosol and its dissociation from caveolin, to an extent comparable to that of the eNOS translocation induced by a [Ca(2+)]i-elevating agonist (10 microM bradykinin). Thus, EPA induces Ca(2+)-independent activation and translocation of eNOS and endothelium-dependent vasorelaxation.
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Affiliation(s)
- M Omura
- Second Department of Internal Medicine, School of Medicine, Yamaguchi University, Ube, Japan
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35
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Sato T, Omura M, Saito J, Hirasawa A, Kakuta Y, Wakabayashi Y, Nishikawa T. Neutrophilia associated with anaplastic carcinoma of the thyroid: production of macrophage colony-stimulating factor (M-CSF) and interleukin-6. Thyroid 2000; 10:1113-8. [PMID: 11201858 DOI: 10.1089/thy.2000.10.1113] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cancers associated with marked neutrophilia are relatively rare. We report here two cases of anaplastic thyroid carcinoma associated with neutrophilia. We measured the concentrations of granulocyte colony-stimulating factor (G-CSF), macrophage CSF (M-CSF), granulocyte-macrophage CSF (GM-CSF), interleukin-1alpha (IL-1alpha), IL-1beta, IL-6, and tumor necrosis factor-alpha (TNF-alpha) in sera, pleural effusion, cyst fluid of the thyroid carcinoma region, or culture supernatants of carcinoma cells. Maximum levels of elevated white blood cell counts reached 106.1 x 10(9)/L (neutrophils 103.0 x 10(9)/L) in case 1 and 62.3 x 10(9)/L (neutrophils 57.9 x 10(9)/L) in case 2. Acute-phase reactants were elevated to various degrees, and hypercalcemia was found in both cases. IL-6, G-CSF, and M-CSF seemed to play the principal roles in neutrophilia in case 1, and the elevated levels of IL-6 and M-CSF seemed to mainly contribute to neutrophilia in case 2. Immunohistochemical staining revealed that carcinoma cells themselves produce IL-6 regardless of the types of carcinoma cells. To our knowledge, this is the first report describing the contribution of M-CSF to neutrophilia in patients with thyroid carcinoma.
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Affiliation(s)
- T Sato
- Department of Hematology, Yokohama Rosai Hospital for Labour Welfare Corporation, Kanagawa, Japan.
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36
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Kuwahara S, Mizukami T, Omura M, Hagihara M, Iinuma Y, Shimizu Y, Tamada H, Tsukamoto Y, Nishida T, Sasaki F. Seasonal changes in the hypothalamo-pituitary-testes axis of the Japanese wood mouse (Apodemus speciosus). Anat Rec 2000; 260:366-72. [PMID: 11074401 DOI: 10.1002/1097-0185(20001201)260:4<365::aid-ar50>3.0.co;2-m] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Seasonal changes in the hypothalamo-pituitary-testes axis of the Japanese wood mice (Apodemus speciosus) were studied. The testes, epididymis, pituitary and hypothalamus were compared between mice in the breeding season (July) and non-breeding season (October) using morphological techniques, and the plasma testosterone level was evaluated by enzyme immunoassay. Significant differences in these tissues were observed between the breeding season and the non-breeding season. Specifically, differences in the non-breeding season included 1) a decline in testicular and epididymal weights, arrest of spermatogenesis and decrease of serum testosterone concentration; 2) a decrease in the number of luteinizing hormone (LH)-, follicle stimulating hormone (FSH)-, prolactin (PRL)-, and growth hormone (GH)-immunoreactive cells, and decrease in the size of FSH, PRL, and GH-immunoreactive cells; and 3) an increase in the size of gonadotropin-releasing hormone (GnRH)-immunoreactive neurons. Our findings indicate that the male adult Japanese wood mouse exhibits unique seasonal changes in the hypothalamo-pituitary-testes axis which are not found in laboratory mice.
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Affiliation(s)
- S Kuwahara
- Department of Veterinary Anatomy, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, Osaka, Japan
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Ito C, Itoigawa M, Katsuno S, Omura M, Tokuda H, Nishino H, Furukawa H. Chemical constituents of Clausena excavata: isolation and structure elucidation of novel furanone-coumarins with inhibitory effects for tumor-promotion. J Nat Prod 2000; 63:1218-1224. [PMID: 11000023 DOI: 10.1021/np990619i] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A study of the chemical constituents of the leaves of Clausena excavata cultivated in a greenhouse led to the isolation and identification of 10 new furanone-coumarins named clauslactones A (1), B (2), C (3), D (4), E (5), F (6), G (7), H (8), I (9), and J (10), together with a known carbazole, clauszoline M, and a coumarin, umbelliferone. The new coumarins contain a C(10) terpenoid side chain with a furanone (gamma-lactone) moiety. Further, in clauslactones A-D (1-4), the terpenoid side chain was shown to be linked to the 7,8-dioxygenated coumarin skeleton through a 1, 4-dioxane ring system. This is the first example of coumarins with these structural characteristics in nature. These furanone-coumarins were found to exhibit inhibitory activity against 12-O-tetradecanoylphorbol-13-acetate-induced Epstein-Barr virus early antigen activation in Raji cells.
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Affiliation(s)
- C Ito
- Faculty of Pharmacy, Meijo University, Tempaku, Nagoya 468-8503, Japan
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Abstract
PURPOSE A non-pigmented adenoma of the ciliary epithelium is rare. No good documentation has been reported in which magnetic resonance imaging (MRI), histological examination, and immunohistological evaluation have all been conducted. We showed how this tumor differed from ciliary body melanoma. METHODS We evaluated the ciliary body tumor by MRI, histological examination, and immunohistochemical examination. The data was compared with previously reported cases. RESULT The tumor was classified as an adenoma of the non-pigmented ciliary epithelium with extracellular pools of hyaluronidase-sensitive mucopolysaccharide. The MRI appearance of the vitreous in our patient showed hyperintensity on T1, isointensity on T2 and marked enhancement with gadolinium. None of 3 other reported patients exhibited the same signals. CONCLUSION MRI appearance is most variable in adenomas and no microscopical diagnosis can be based on that. Our patient showed isointensity on T2 with marked enhancement by gadolinium when compared to malignant melanoma.
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Affiliation(s)
- T Nakazawa
- Department of Ophthalmology, Yamagata City Hospital, Japan.
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39
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Omura M, Masuda Y, Hirata M, Tanaka A, Makita Y, Ogata R, Inoue N. Onset of spermatogenesis is accelerated by gestational administration of 1,2,3,4,6,7-hexachlorinated naphthalene in male rat offspring. Environ Health Perspect 2000; 108:539-544. [PMID: 10856028 PMCID: PMC1638139 DOI: 10.1289/ehp.00108539] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We treated pregnant rats with 1 microg/kg body weight/day 1,2,3,4,6,7-hexachlorinated naphthalene (1,2,3,4,6,7-HxCN) on days 14-16 of gestation and examined the effects on the reproductive systems of their male offspring at various phases of sexual maturation. Sperm count in the cauda epididymidis did not change in 1,2,3,4,6, 7-HxCN-treated rats on postnatal day 89, the age of sexual maturity, but the sperm count in the cauda epididymidis did increase to approximately 180% of the control value on postnatal day 62. In addition, homogenization-resistant testicular spermatids increased to approximately 160% of the control value on postnatal day 48, and the percent of postmeiotic tubules increased to approximately 190% of the control value on postnatal day 31 in this group. These results indicate that the onset of spermatogenesis was accelerated in the 1,2,3,4,6,7-HxCN rats. Serum concentrations of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) had already reached the maximum level on postnatal day 31 in the 1,2,3,4,6, 7-HxCN group, suggesting that the onset of LH and FSH secretions from the pituitary gland was also accelerated and that this endocrine disruption was the cause of early onset of spermatogenesis in this group. In the fat of 1,2,3,4,6,7-HxCN-treated dams, 5.75+/-2.81 ppb 1,2,3,4,6,7-HxCN was detected when offspring were weaned. This concentration was 5-10 times higher than that found in human adipose tissue.
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Affiliation(s)
- M Omura
- Department of Hygiene, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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Nishikawa T, Omura M. Clinical characteristics of primary aldosteronism: its prevalence and comparative studies on various causes of primary aldosteronism in Yokohama Rosai Hospital. Biomed Pharmacother 2000; 54 Suppl 1:83s-85s. [PMID: 10914999 DOI: 10.1016/s0753-3322(00)80019-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
We studied 1,020 patients with hypertension visiting our outpatient clinic during a five-year period, from 1995 until 1999. Those subjects were screened by determining plasma renin activity (PRA) and plasma aldosterone concentration (PAC) after testing routine laboratory examinations in order to differentiate secondary hypertension from essential hypertension. All patients with low-reninemic hypertension were examined by furosemide plus the upright test. This led to an increase in diagnoses of primary aldosteronism (PA) (confirmed by captopril-loading test). Our studies demonstrated that the incidence of PA is 5.4%, and also that the plasma potassium level is not always beneficial for suspecting the presence of PA, because 28% of the patients with PA show only hypokalemia. We would like to emphasize that adrenal venous sampling plays a critical role in establishing the optimal management for patients with PA, because CT imaging is limited to detection of adrenal masses.
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Affiliation(s)
- T Nishikawa
- Department of Medicine, Yokohama Rosai Hospital, Yokohama City, Kanagawa, Japan
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Kita M, Hisada S, Endo-Inagaki T, Omura M, Moriguchi T. Changes in the levels of mRNAs for putative cell growth-related genes in the albedo and flavedo during citrus fruit development. Plant Cell Rep 2000; 19:582-587. [PMID: 30754821 DOI: 10.1007/s002990050777] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Changes in mRNA levels for the seven gene homologues to endoxyloglucan transferase-related protein, expansin, extensin, β-1,3 glucanase, glycine-rich protein, pectinacetylesterase and pectinesterase, which were obtained by random sequencing studies, were investigated in relation to rind development in citrus (Citrus unshiu Marc.) fruit. Expression patterns in the albedo and flavedo were classified into four types: Type-I, transcript levels low in early fruit development but increased at the ripening stage; Type-II, transcript levels high until mid-development and then decreased towards ripening; Type-III, detectable transcript limited to fruitlets at 26 days after flowering (DAF); Type-IV, ubiquitous during the development. Based on the expression patterns, we discuss the possible roles of these genes in rind development.
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Affiliation(s)
- M Kita
- United Graduate School, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan, , , , , , JP
| | - S Hisada
- Hamamatsu Photonics K.K., Sunayama-cho, Hamamatsu, Shizuoka 430-8587, Japan, , , , , , JP
| | - T Endo-Inagaki
- Department of Citriculture, National Institute of Fruit Tree Science, Shimizu, Shizuoka 424-0292, Japan, , , , , , JP
| | - M Omura
- Department of Citriculture, National Institute of Fruit Tree Science, Shimizu, Shizuoka 424-0292, Japan, , , , , , JP
| | - T Moriguchi
- Department of Citriculture, National Institute of Fruit Tree Science, Shimizu, Shizuoka 424-0292, Japan, , , , , , JP
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Kita M, Hirata Y, Moriguchi T, Endo-Inagaki T, Matsumoto R, Hasegawa S, Suhayda CG, Omura M. Molecular cloning and characterization of a novel gene encoding limonoid UDP-glucosyltransferase in Citrus. FEBS Lett 2000; 469:173-8. [PMID: 10713266 DOI: 10.1016/s0014-5793(00)01275-8] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
We isolated a cDNA clone encoding limonoid UDP-glucosyltransferase (limonoid GTase) from the albedo of Satsuma mandarin (Citrus unshiu Marc.) and investigated the contribution to limonoid glucoside accumulation in fruit. The isolated cDNA clone (CitLGT) was 1732 bp in length encoding 511 deduced amino acids with a predicted molecular mass of 57.5 kDa. The products of in vitro translation from an expression vector had the limonoid GTase activity. Southern blot analysis of genomic DNA indicated that CitLGT was present as a single copy gene in the Citrus genome. The amount of transcript corresponding to CitLGT mRNA changed the same way as the fluctuation of limonin glucoside content during fruit development of navel orange (Citrus sinensis Osb.). This indicates that the transcription of CitLGT regulates the conversion of limonoid aglycones to glucosides in citrus fruit.
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Affiliation(s)
- M Kita
- United Graduate School, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan.
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Moriguchi T, Komatsu A, Kita M, Akimitsu K, Endo-Inagaki T, Omura M. Molecular cloning of a homologue of dad-1 gene in citrus: distinctive expression during fruit development. Biochim Biophys Acta 2000; 1490:198-202. [PMID: 10786637 DOI: 10.1016/s0167-4781(99)00243-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A cDNA homologue to the human defender against apoptotic death gene (dad-1), which is involved in programmed cell death, was isolated from satsuma mandarin (Citrus unshiu Marc.) fruit. It (Citdad-1-1) was 345 bp long, with a deduced protein sequence of 115 amino acids. Southern hybridization suggests that dad-1-related sequences are present as a small gene family in the citrus genome. Expression of Citdad-1-1 was progressively down-regulated in leaves as they matured, but not in juice sac/segment epidermis (edible part) towards fruit ripening. The role of dad-1 during citrus development is also discussed.
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Affiliation(s)
- T Moriguchi
- Department of Citriculture, National Institute of Fruit Tree Science, Shimizu, Shizuoka, Japan.
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Murakami A, Gao G, Omura M, Yano M, Ito C, Furukawa H, Takahashi D, Koshimizu K, Ohigashi H. 1,1-Dimethylallylcoumarins potently suppress both lipopolysaccharide- and interferon-gamma-induced nitric oxide generation in mouse macrophage RAW 264.7 cells. Bioorg Med Chem Lett 2000; 10:59-62. [PMID: 10636244 DOI: 10.1016/s0960-894x(99)00578-8] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.8] [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: 11/19/2022]
Abstract
We investigated the suppressive effects of 16 coumarin-related compounds on both lipopolysaccharide (LPS)- and interferon (IFN)-gamma-induced nitric oxide (NO) generation in a mouse macrophage cell line, RAW 264.7. Notably, coumarins possessing prenyl unit(s) were found to be highly active, a tendency consistent with our previous study. Among the coumarins tested, 1,1-dimethylallylcoumarins showed the highest inhibitory activity. Western blotting analysis revealed that they inhibited NO generation by suppressing inducible NO synthase (iNOS) protein expression. Our ongoing studies suggest that coumarins are prominent natural compounds that attenuate excessive and prolonged NO generation at inflammatory sites.
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Affiliation(s)
- A Murakami
- Department of Biotechnological Science, Faculty of Biology-Oriented Science and Technology, Kinki University, Iwade-Uchita, Wakayama, Japan
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Tanaka A, Hirata M, Omura M, Zhao M, Makita Y, Yamazaki K, Inoue N, Gotoh K. Comparative study of the toxic effects of gallium arsenide, indium arsenide and arsenic trioxide following intratracheal instillations to the lung of Syrian golden hamsters. Fukuoka Igaku Zasshi 2000; 91:21-33. [PMID: 10714013] [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: 02/15/2023]
Abstract
Toxic effects of gallium arsenide (GaAs), indium arsenide (InAs) and arsenic trioxide (As2O3) were studied in male Syrian golden hamsters. GaAs (7.7 mg/kg) and As2O3 (1.3 mg/kg) particles were instilled intratracheally twice a week a total of 16 times, while InAs (7.7 mg/kg) was instilled a total of 14 times. As a control, hamsters were treated with the vehicle, phosphate buffer solution. During the instillation period, the cumulative body weight gain of the InAs-, but not the GaAs- or As2O3-treated hamsters was suppressed significantly, when compared with the control group. Slight to severe inflammatory responses were observed in the lung for all treatment groups. The most severe inflammatory change, characterized by an accumulation of neutrophils and macrophages, exudation, thickness of the pleura and fibrotic proliferation was found in the InAs-treated hamsters. Extensive alveolar or bronchiolar cell hyperplasia with or without keratinizing squamous cell metaplasia was observed in almost all the InAs-treated hamsters. Furthermore, squamous cell metaplasia or squamous cell hyperplasia developed in some of the InAs-treated hamsters, but not in the GaAs- or As2O3-treated hamsters. Slight to mild lesions were found in the convoluted tubules of the kidney in both the GaAs and InAs groups. From the present study, the toxic potency of these particles was provisionally estimated to be in the following order: InAs > GaAs > As2O3, at the dosage level used in this study. Furthermore, there was evidence that InAs particles could induce pulmonary, renal or systemic toxicity, and as such, InAs particles may produce pulmonary precancerous change when instilled intratracheally into hamsters.
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Affiliation(s)
- A Tanaka
- Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Omura M, Kagami S, Seki N, Iizuka T, Nishikawa T, Sasano K. [Case of primary aldosteronism caused by adrenal microadenoma that permitted clinical observation from onset]. Nihon Naika Gakkai Zasshi 1999; 88:2474-5. [PMID: 10630011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Omura M, Yamaguchi M. Regulation of protein phosphatase activity by regucalcin localization in rat liver nuclei. J Cell Biochem 1999; 75:437-45. [PMID: 10536367] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
The regulatory role of regucalcin on protein phosphatase activity in isolated rat liver nuclei was investigated. Phosphatase activity toward phosphotyrosine and phosphoserine was significantly increased by the addition of CaCl(2) (10(-5) and 10(-4) M) in the enzyme reaction mixture. Trifluoperazine (25 and 50 microM), an antagonist of calmodulin, significantly inhibited protein phosphatase activity toward phosphoserine, while it had no effect on the enzyme activity toward phosphotysine and phosphothreonine. Cyclosporin A (10(-6)-10(-4) M), an inhibitor of Ca(2+)/calmodulin-dependent protein phosphatase activity toward phosphoserine, but not phosphotyrosine and phosphoserine. Thus, Ca(2+)/calmodulin-dependent phosphatases were present in liver nuclei. Regucalcin (0.25 and 0.5 microM) had an inhibitory effect on liver nuclear phosphatase activity toward phosphotyrosine, phosphoserine, and phosphothreonine. The presence of anti-regucalcin monoclonal antibody (25 and 50 ng/ml) in the enzyme reaction mixture caused a significant elevation of nuclear phosphatase activity toward three phosphoaminoacids. An analysis with sodium sulfate-polyacrylamide gel electrophoresis suggested a possibility of localization of regucalcin in liver nuclei. Moreover, regucalcin was determined in liver nuclei using enzyme-linked immunoadsorbent assay. The present study demonstrates that the endogenous regucalcin inhibits phosphatase activity in the liver nuclei.
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Affiliation(s)
- M Omura
- Laboratory of Endocrinology and Molecular Metabolism, Graduate School of Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
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Matsuyama T, Akihama T, Ito Y, Omura M, Fukui K. Distribution of TGG repeat-related sequences in 'Trovita' orange (Citrus sinensis Osbeck) chromosomes. Genome 1999; 42:1251-4. [PMID: 10659794 DOI: 10.1139/g99-058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The clone pAS"C" is a sequence related to M13 phage minisatellite sequences isolated from bovine DNA. It contains TGG repeats, and related sequences are abundant in the Citrus genome. Fluorescent in situ hybridization (FISH) signals detected using this clone as a probe showed that the TGG repeat-related sequences are found on all the Citrus chromosomes, but are not found in Citrus-specific CMA+/DAPI- heterochromatic regions located at the extreme ends of each chromosome. These data suggest that the TGG-repeated sequences are evolutionarily conserved and that the CMA+/DAPI- heterochromatic regions were added to the chromosome ends at a recent stage in Citrus evolution.
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Affiliation(s)
- T Matsuyama
- Faculty of Agriculture, Meiji University, Kawasaki, Japan
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Ochiai K, Omura M, Mochizuki A, Ito M, Tomioka H. Human umbilical vein endothelial cells support interleukin-3- and interleukin-5-induced eosinophil differentiation from cord blood CD34+ cells. Int Arch Allergy Immunol 1999; 120 Suppl 1:2-6. [PMID: 10529593 DOI: 10.1159/000053583] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Human umbilical vein endothelial cells (HUVEC) are an important source of hematopoietic cytokines, and interleukin-3 (IL-3)- and IL-5-induced eosinophil differentiation from CD34+ cells has been observed. To show the supportive effects of endothelial cells on eosinophil differentiation, we examined the effects of cocultured HUVEC on IL-3 and IL-5-induced eosinophil differentiation from human umbilical cord blood CD34+ cells. METHODS CD34+ cells were obtained from the heparinized umbilical vein blood of 10 volunteers using a CD34-conjugated magnetic bead positive direct selection procedure. With HUVEC in Transwell, CD34+ cells were then cultured for 14-28 days. In neutralizing experiments on HUVEC-derived cytokines, antibodies to both stem cell factor (SCF) and granulocyte/macrophage colony-stimulating factor (GM-CSF) were added to the cell cultures. RESULTS Cocultured HUVEC upregulated IL-3 and IL-5-induced eosinophil differentiation from CD34+ cells on day 28 of culture by 75.0%. The eosinophilopoietic effect of HUVEC was significantly only when the cells were present in the culture from day 15 to day 28. Addition of anti-SCF antibody or anti-GM-CSF monoclonal antibody to the culture significantly suppressed HUVEC-combined IL-3- and IL-5-induced eosinophil differentiation on day 28 of culture by 49.2 and 55.0%, respectively. CONCLUSIONS These results indicate that several cytokines including GM-CSF and SCF from HUVEC promote IL-3- and IL-5-induced eosinophil differentiation from CD34+ cells.
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Affiliation(s)
- K Ochiai
- Department of Internal Medicine, Toho University School of Medicine, Sakura Hospital, Sakura, Japan.
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Omura M, Katsumata T, Misawa H, Yamaguchi M. Decrease in protein kinase and phosphatase activities in the liver nuclei of rats exposed to carbon tetrachloride. Toxicol Appl Pharmacol 1999; 160:192-7. [PMID: 10527918 DOI: 10.1006/taap.1999.8760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The alteration in protein kinase and phosphatase activities in the liver nuclei of rats administered carbon tetrachloride (CCl(4)) was investigated. Rats received a single oral administration of CCl(4) (1 ml/100 g body wt of 5, 10, and 25% CCl(4) in corn oil), and 5, 24, and 48 h later they were euthanized by bleeding. The administration of CCl(4) (10 and 25%) caused a significant decrease in protein kinase activity in the liver nuclei. The enzyme activity in the liver nuclei from normal and CCl(4)-administered rats was significantly increased by the addition of Ca(2+) (0.5 mM) and calmodulin (10 microg/ml) in the reaction mixture, suggesting that Ca(2+)/calmodulin-dependent protein kinase activation is not suppressed by CCl(4) treatment. Liver nuclear phosphatase activity toward phosphotyrosine, but not phosphoserine and phosphothreonine, was markedly decreased by CCl(4) (5, 10, and 25%) administration. This decrease was seen 5 h after CCl(4) administration. The presence of vanadate (10(-4) M) in the reaction mixture caused a significant decrease in phosphotyrosine phosphatase activity in the liver nuclei from normal and CCl(4)-administered rats, whereas the enzyme activity was not decreased by okadaic acid (10(-5) M) or sodium fluoride (10(-3) M). The effect of anti-regucalcin antibody (100 ng/ml) in increasing phosphotyrosine phosphatase activity was seen in the liver nuclei of CCl(4)-administered rats, suggesting that regucalcin-sensitive phosphatase activity is decreased by CCl(4) administration. The present study demonstrates that CCl(4) administration induces a decrease in protein kinase and tyrosine phosphatase activities, which are involved in signaling factors in the liver nuclei of rats.
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Affiliation(s)
- M Omura
- Graduate School of Nutritional Sciences, University of Shizuoka, 52-1 Yada, Shizuoka City, 422-8526, Japan
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