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Hirata R, Iwata T, Fujita T, Nagahara T, Matsuda S, Sasaki S, Taniguchi Y, Hamamoto Y, Ouhara K, Kudo Y, Kurihara H, Mizuno N. Periostin regulates integrin expression in gingival epithelial cells. J Oral Biosci 2024; 66:170-178. [PMID: 38048847 DOI: 10.1016/j.job.2023.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 12/06/2023]
Abstract
OBJECTIVE Human gingival epithelial cells (HGECs) function as a mechanical barrier against invasion by pathogenic organisms through epithelial cell-cell junction complexes, which are complex components of integrin. Integrins play an important role in the protective functions of HGECs. Human periodontal ligament (HPL) cells regulate periodontal homeostasis. However, periodontitis results in the loss of HPL cells. Therefore, as replenishment, HPL cells or mesenchymal stem cells (MSCs) can be transplanted. Herein, HPL cells and MSCs were used to elucidate the regulatory mechanisms of HGECs, assuming periodontal tissue homeostasis. METHODS Human gingival fibroblasts (HGFs), HGECs, HPL cells, and MSCs were cultured, and the conditioned medium was collected. With or without silencing periostin mRNA, HGECs were cultured under normal conditions or in a conditioned medium. Integrin and periostin mRNA expression was determined using real-time polymerase chain reaction. Integrin protein expression was analyzed using flow cytometry, and periostin protein expression was determined via western blotting. RESULTS The conditioned medium affected integrin expression in HGECs. Higher expression of periostin was observed in MSCs and HPL cells than in HGFs. The conditioned medium that contained periostin protein regulated integrin expression in HGECs. After silencing periostin in MSCs and HPL cells, periostin protein was not detected in the conditioned medium, and integrin expression in HGECs remained unaffected. CONCLUSIONS Integrins in HGECs are regulated by periostin secreted from HPL cells and MSCs. This result suggests that periostin maintains gingival cell adhesion and regulates bacterial invasion/infection. Therefore, the functional regulation of periostin-secreting cells is important in preventing periodontitis.
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Affiliation(s)
- Reika Hirata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Tomoyuki Iwata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan.
| | - Tsuyoshi Fujita
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Takayoshi Nagahara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Shinji Matsuda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Shinya Sasaki
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Yuri Taniguchi
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Yuta Hamamoto
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Kazuhisa Ouhara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Yasusei Kudo
- Department of Oral Bioscience, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan
| | - Hidemi Kurihara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
| | - Noriyoshi Mizuno
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima 734-8553, Japan
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Nagahara T, Takeda K, Wada K, Naruse T, Shiba H. Rare root canal morphology of maxillary second molars: A report of three cases. Clin Case Rep 2023; 11:e7547. [PMID: 37415578 PMCID: PMC10320364 DOI: 10.1002/ccr3.7547] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/24/2023] [Accepted: 06/02/2023] [Indexed: 07/08/2023] Open
Abstract
Key Clinical Message Endodontists should be aware that some maxillary second molars can have more than three roots. If any unusual anatomical features are detected during dental radiography or endodontic procedures, it is necessary to conduct cone-beam computed tomography (CBCT) scanning to prevent procedural mishaps. Abstract CBCT can provide three-dimensional reconstructed images of the root canal system. With the help of CBCT, variations in tooth root number and root canal morphology, such as extra canals, apical ramifications, apical deltas, and lateral canals, can be identified. Knowledge of the variations is very important for the success of endodontic treatment. This report suggests that endodontists must not assume that a MSM has only three tooth roots, which is the most prevalent number.
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Affiliation(s)
- Takayoshi Nagahara
- Nippon Kokan Fukuyama HospitalHiroshimaJapan
- Department of Biological Endodontics, Graduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Katsuhiro Takeda
- Department of Biological Endodontics, Graduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | | | - Tomoya Naruse
- Department of Biological Endodontics, Graduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Hideki Shiba
- Department of Biological Endodontics, Graduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
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3
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Iwata T, Kaneda-Ikeda E, Takahashi K, Takeda K, Nagahara T, Kajiya M, Sasaki S, Ishida S, Yoshioka M, Matsuda S, Ouhara K, Fujita T, Kurihara H, Mizuno N. Regulation of osteogenesis in bone marrow-derived mesenchymal stem cells via histone deacetylase 1 and 2 co-cultured with human gingival fibroblasts and periodontal ligament cells. J Periodontal Res 2023; 58:83-96. [PMID: 36346011 DOI: 10.1111/jre.13070] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 10/04/2022] [Accepted: 10/21/2022] [Indexed: 11/10/2022]
Abstract
OBJECTIVE This study aimed to determine the regulatory mechanism of bone marrow-derived mesenchymal stem cell (BM-MSC) differentiation mediated by humoral factors derived from human periodontal ligament (HPL) cells and human gingival fibroblasts (HGFs). We analyzed histone deacetylase (HDAC) expression and activity involved in BM-MSC differentiation and determined their regulatory effects in co-cultures of BM-MSCs with HPL cells or HGFs. BACKGROUND BM-MSCs can differentiate into various cell types and can, thus, be used in periodontal regenerative therapy. However, the mechanism underlying their differentiation remains unclear. Transplanted BM-MSCs are affected by periodontal cells via direct contact or secretion of humoral factors. Therefore, their activity is regulated by humoral factors derived from HPL cells or HGFs. METHODS BM-MSCs were indirectly co-cultured with HPL cells or HGFs under osteogenic or growth conditions and then analyzed for osteogenesis, HDAC1 and HDAC2 expression and activity, and histone H3 acetylation. BM-MSCs were treated with trichostatin A, or their HDAC1 or HDAC2 expression was silenced or overexpressed during osteogenesis. Subsequently, they were evaluated for osteogenesis or the effects of HDAC activity. RESULTS BM-MSCs co-cultured with HPL cells or HGFs showed suppressed osteogenesis, HDAC1 and HDAC2 expression, and HDAC phosphorylation; however, histone H3 acetylation was enhanced. Trichostatin A treatment remarkably suppressed osteogenesis, decreasing HDAC expression and enhancing histone H3 acetylation. HDAC1 and HDAC2 silencing negatively regulated osteogenesis in BM-MSCs to the same extent as that achieved by indirect co-culture with HPL cells or HGFs. Conversely, their overexpression positively regulated osteogenesis in BM-MSCs. CONCLUSION The suppressive effects of HPL cells and HGFs on BM-MSC osteogenesis were regulated by HDAC expression and histone H3 acetylation to a greater extent than that mediated by HDAC activity. Therefore, regulation of HDAC expression has prospects in clinical applications for effective periodontal regeneration, mainly, bone regeneration.
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Affiliation(s)
- Tomoyuki Iwata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Eri Kaneda-Ikeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Keita Takahashi
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Katsuhiro Takeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.,Department of Biological Endodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Takayoshi Nagahara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Mikihito Kajiya
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.,Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan
| | - Shinya Sasaki
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Shu Ishida
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Minami Yoshioka
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Shinji Matsuda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Kazuhisa Ouhara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Tsuyoshi Fujita
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Hidemi Kurihara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Noriyoshi Mizuno
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
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Nagahara T, Takeda K, Inoue S, Wada K, Shiba H. Successful regenerative response of a severe bone defect in a right lower central incisor affected by a cemental tear. Clin Case Rep 2022; 10:e6472. [PMCID: PMC9637247 DOI: 10.1002/ccr3.6472] [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] [Received: 06/13/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Takayoshi Nagahara
- Nippon Kokan Fukuyama Hospital Hiroshima Japan
- Department of Biological Endodontics, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
| | - Katsuhiro Takeda
- Department of Biological Endodontics, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
| | | | | | - Hideki Shiba
- Department of Biological Endodontics, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
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Nagahara T, Takeda K, Inoue S, Wada K, Shirawachi S, Iwata T, Shiba H. Endodontic Approach and Periodontal Regenerative Therapy for a Mandibular Right Central Incisor Affected by a Perforation and Cemental Tear. INT J PERIODONT REST 2021; 41:e205-e212. [PMID: 34547073 DOI: 10.11607/prd.5466] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A cemental tear involves complete or incomplete separation of the cementum on the root surface along the cementodentinal junction. Because a cemental tear can lead to periodontal breakdown and mimic endodontic and periodontal lesions, diagnosing clinical cases can be difficult and requires special examinations. A 72-year-old woman presented with a localized periodontal defect on the labial and interproximal surfaces of the mandibular right central incisor. Performing CBCT scans and a biopsy during periodontal surgery allowed definitive diagnosis of a cemental tear and perforation of the site. First, the perforation was repaired with endodontic therapy. Periodontal regenerative therapy using recombinant human fibroblast growth factor-2 (rhFGF-2) was then performed after removing granulomatous tissue and cementum fragments. Examination of the biopsy specimen showed bacterial colonies. This case showed successful clinical and radiographic outcomes at the 18-month follow-up.
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Affiliation(s)
| | - Katsuhiro Takeda
- Department of Biological Endodontics, Graduate School of Biomedical and Health
Sciences, Hiroshima University, Hiroshima, Japan
| | - Sadayuki Inoue
- Nippon Kokan Fukuyama Hospital, Fukuyama, Hiroshima, Japan
| | | | - Satomi Shirawachi
- Department of Biological Endodontics, Graduate School of Biomedical and Health
Sciences, Hiroshima University, Hiroshima, Japan
| | - Tomoyuki Iwata
- Department of Periodontal Medicine, Graduate School of Biomedical and Health Sciences,
Hiroshima University, Hiroshima, Japan
| | - Hideki Shiba
- Department of Biological Endodontics, Graduate School of Biomedical and Health
Sciences, Hiroshima University, Hiroshima, Japan
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6
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Iwata T, Mizuno N, Nagahara T, Kaneda-Ikeda E, Kajiya M, Sasaki S, Takeda K, Kiyota M, Yagi R, Fujita T, Kurihara H. Cytokines regulate stemness of mesenchymal stem cells via miR-628-5p during periodontal regeneration. J Periodontol 2021; 93:269-286. [PMID: 34152611 DOI: 10.1002/jper.21-0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 06/11/2021] [Accepted: 06/12/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND Cytokines play key roles in stimulating periodontal regeneration; however, their exact mechanisms of action remain unclear. Mesenchymal stem cells (MSCs) are multipotent cells that have self-renewal abilities and can differentiate into periodontal tissues such as bone, cementum, and periodontal ligaments following transplantation, like periodontal progenitor cells. Here, we used MSCs to identify the regulatory genes induced by periodontal regenerative cytokines. METHODS Human MSCs (hMSCs) were cultured under conditions of periodontal regenerative cytokine stimulation or silencing of undifferentiated hMSC transcription factors. To characterize the changes associated with periodontal regenerative cytokine-regulated microRNAs (miRNAs), miRNA, and mRNA expression was evaluated using miRNA arrays and quantitative real-time polymerase chain reaction, respectively. One of the identified miRNAs, miR-628-5p, was then overexpressed or suppressed in hMSCs during osteogenesis; the effect of these changes on osteogenesis was investigated. RESULTS Cytokine-stimulated MSCs showed characteristic miRNA profiles and mRNA levels of undifferentiated hMSC transcription factors ETV1, SOX11, and GATA6. Next, we silenced these transcription factors in MSCs and examined the miRNA profiles. The levels of miR-628-5p were decreased upon all cytokine treatments and were increased upon silencing of ETV1, SOX11, and GATA6. Overexpression of miR-628-5p suppressed osteogenesis; however, its inhibition enhanced OPN, ALP, OC, BMP2, and RUNX2 mRNA levels, and bone matrix mineralization, but not OSX mRNA or ALP activity. CONCLUSIONS miR-628-5p negatively regulates MSC stemness during periodontal regeneration. Periodontal regenerative cytokines act as miR-628-5p suppressors to support periodontal regeneration. Thus, selection of effective cytokines for different MSCs, based on miRNA profiling, is important for advancing regenerative therapies.
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Affiliation(s)
- Tomoyuki Iwata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Noriyoshi Mizuno
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Takayoshi Nagahara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Eri Kaneda-Ikeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Mikihito Kajiya
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Shinya Sasaki
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Katsuhiro Takeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.,Department of Biological Endodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Mari Kiyota
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Ryoichi Yagi
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Tsuyoshi Fujita
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Hidemi Kurihara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
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7
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Iwata T, Mizuno N, Ishida S, Kajiya M, Nagahara T, Kaneda-Ikeda E, Yoshioka M, Munenaga S, Ouhara K, Fujita T, Kawaguchi H, Kurihara H. Functional Regulatory Mechanisms Underlying Bone Marrow Mesenchymal Stem Cell Senescence During Cell Passages. Cell Biochem Biophys 2021; 79:321-336. [PMID: 33559812 DOI: 10.1007/s12013-021-00969-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2021] [Indexed: 12/22/2022]
Abstract
Mesenchymal stem cell (MSC) transplantation is an effective periodontal regenerative therapy. MSCs are multipotent, have self-renewal ability, and can differentiate into periodontal cells. However, senescence is inevitable for MSCs. In vitro, cell senescence can be induced by long-term culture with/without cell passage. However, the regulatory mechanism of MSC senescence remains unclear. Undifferentiated MSC-specific transcription factors can regulate MSC function. Herein, we identified the regulatory transcription factors involved in MSC senescence and elucidated their mechanisms of action. We cultured human MSCs (hMSCs) with repetitive cell passages to induce cell senescence and evaluated the mRNA and protein expression of cell senescence-related genes. Additionally, we silenced the cell senescence-induced transcription factors, GATA binding protein 6 (GATA6) and SRY-box 11 (SOX11), and investigated senescence-related signaling pathways. With repeated passages, the number of senescent cells increased, while the cell proliferation capacity decreased; GATA6 mRNA expression was upregulated and that of SOX11 was downregulated. Repetitive cell passages decreased Wnt and bone morphogenetic protein (BMP) signaling pathway-related gene expression. Silencing of GATA6 and SOX11 regulated Wnt and BMP signaling pathway-related genes and affected cell senescence-related genes; moreover, SOX11 silencing regulated GATA6 expression. Hence, we identified them as pair of regulatory transcription factors for cell senescence in hMSCs via the Wnt and BMP signaling pathways.
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Affiliation(s)
- T Iwata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan.
| | - N Mizuno
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - S Ishida
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - M Kajiya
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - T Nagahara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - E Kaneda-Ikeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - M Yoshioka
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - S Munenaga
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
- Department of General Dentistry, Hiroshima University Hospital, Hiroshima, 734-8553, Japan
| | - K Ouhara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - T Fujita
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - H Kawaguchi
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
- Department of General Dentistry, Hiroshima University Hospital, Hiroshima, 734-8553, Japan
| | - H Kurihara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
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Iwata T, Mizuno N, Nagahara T, Kaneda-Ikeda E, Kajiya M, Kitagawa M, Takeda K, Yoshioka M, Yagi R, Takata T, Kurihara H. Identification of regulatory mRNA and microRNA for differentiation into cementoblasts and periodontal ligament cells. J Periodontal Res 2020; 56:69-82. [PMID: 32797637 DOI: 10.1111/jre.12794] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 07/09/2020] [Accepted: 07/18/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Periodontitis causes periodontal tissue destruction and results in physiological tooth dysfunction. Therefore, periodontal regeneration is ideal therapy for periodontitis. Mesenchymal stem cells (MSCs) are useful for periodontal regenerative therapy as they can differentiate into periodontal cells; however, the underlying regulatory mechanism is unclear. In this study, we attempted to identify regulatory genes involved in periodontal cell differentiation and clarify the differentiation mechanism for effective periodontal regenerative therapy. BACKGROUND The cementum and periodontal ligament play important roles in physiological tooth function. Therefore, cementum and periodontal ligament regeneration are critical for periodontal regenerative therapy. Mesenchymal stem cell transplantation can be a common periodontal regenerative therapy because these cells have multipotency and self-renewal ability, which induces new cementum or periodontal ligament formation. Moreover, MSCs can differentiate into cementoblasts. Cementoblast- or periodontal ligament cell-specific proteins have been reported; however, it is unclear how these proteins are regulated. MicroRNA (miRNA) can also act as a key regulator of MSC function. Therefore, in this study, we identified regulatory genes involved in cementoblast or periodontal cell differentiation and commitment. METHODS Human MSCs (hMSCs), cementoblasts (HCEM), and periodontal ligament cells (HPL cells) were cultured, and mRNA or miRNA expression was evaluated. Additionally, cementoblast-specific genes were overexpressed or suppressed in hMSCs and their expression levels were investigated. RESULTS HCEM and HPL cells expressed characteristic genes, of which we focused on ets variant 1 (ETV1), miR-628-5p, and miR-383 because ETV1 is a differentiation-related transcription factor, miR-628-5p was the second-highest expressed gene in HCEM and lowest expressed gene in HPL cells, and miR-383 was the highest expressed gene in HCEM. miR-628-5p and miR-383 overexpression in hMSCs regulated ETV1 mRNA expression, and miR-383 overexpression downregulated miR-628-5p expression. Moreover, miR-383 suppression decreased miR-383 expression and enhanced ETV1 mRNA expression, but miR-383 suppression also decreased miR-628-5p. Furthermore, silencing of ETV1 expression in hMSCs regulated miR-628-5p and miR-383 expression. Concerning periodontal cell commitment, miR-628-5p, miR-383, and ETV1 regulated the expression of HCEM- or HPL cell-related genes by adjusting the expression of these miRNAs. CONCLUSION HCEM and HPL cells show characteristic mRNA and miRNA profiles. In particular, these cells have specific miR-383, miR-628-5p, and ETV1 expression patterns, and these genes interact with each other. Therefore, miR-383, miR-628-5p, and ETV1 are key genes involved in cementogenesis or HPL cell differentiation.
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Affiliation(s)
- Tomoyuki Iwata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Noriyoshi Mizuno
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Takayoshi Nagahara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Eri Kaneda-Ikeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Mikihito Kajiya
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Masae Kitagawa
- Department of Oral and Maxillofacial Pathobiology, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.,Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan
| | - Katsuhiro Takeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.,Department of Biological Endodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Minami Yoshioka
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Ryoichi Yagi
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Takashi Takata
- Department of Oral and Maxillofacial Pathobiology, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.,Tokuyama University, Tokuyama, Japan
| | - Hidemi Kurihara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
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9
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Kaneda-Ikeda E, Iwata T, Mizuno N, Nagahara T, Kajiya M, Ouhara K, Yoshioka M, Ishida S, Kawaguchi H, Kurihara H. Regulation of osteogenesis via miR-101-3p in mesenchymal stem cells by human gingival fibroblasts. J Bone Miner Metab 2020; 38:442-455. [PMID: 31970478 DOI: 10.1007/s00774-019-01080-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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] [Received: 07/25/2019] [Accepted: 12/27/2019] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Mesenchymal stem cells (MSCs) can differentiate into various types of cells and can thus be used for periodontal regenerative therapy. However, the mechanism of differentiation is still unclear. Transplanted MSCs are, via their transcription factors or microRNAs (miRNAs), affected by periodontal cells with direct contact or secretion of humoral factors. Therefore, transplanted MSCs are regulated by humoral factors from human gingival fibroblasts (HGF). Moreover, insulin-like growth factor (IGF)-1 is secreted from HGF and regulates periodontal regeneration. To clarify the regulatory mechanism for MSC differentiation by humoral factors from HGF, we identified key genes, specifically miRNAs, involved in this process, and determined their function in MSC differentiation. MATERIALS AND METHODS Mesenchymal stem cells were indirectly co-cultured with HGF in osteogenic or growth conditions and then evaluated for osteogenesis, undifferentiated MSC markers, and characteristic miRNAs. MSCs had their miRNA expression levels adjusted or were challenged with IGF-1 during osteogenesis, or both of which were performed, and then, MSCs were evaluated for osteogenesis or undifferentiated MSC markers. RESULTS Mesenchymal stem cells co-cultured with HGF showed suppression of osteogenesis and characteristic expression of ETV1, an undifferentiated MSC marker, as well as miR-101-3p. Over-expression of miR-101-3p regulated osteogenesis and ETV1 expression as well as indirect co-culture with HGF. IGF-1 induced miR-101-3p and ETV1 expression. However, IGF-1 did not suppress osteogenesis. CONCLUSIONS Humoral factors from HGF suppressed osteogenesis in MSCs. The effect was regulated by miRNAs and undifferentiated MSC markers. miR-101-3p and ETV1 were the key factors and were regulated by IGF-1.
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Affiliation(s)
- Eri Kaneda-Ikeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Tomoyuki Iwata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan.
| | - Noriyoshi Mizuno
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Takayoshi Nagahara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Mikihito Kajiya
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Kazuhisa Ouhara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Minami Yoshioka
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Shu Ishida
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Hiroyuki Kawaguchi
- Department of Department of General Dentistry, Hiroshima University Hospital, Hiroshima, 734-8553, Japan
| | - Hidemi Kurihara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
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10
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Nagahara T, Takeda K, Wada K, Shirawachi S, Iwata T, Kurihara H, Shiba H. A mandibular second molar with a middle mesial root canal. Clin Case Rep 2020; 8:1015-1020. [PMID: 32577255 PMCID: PMC7303868 DOI: 10.1002/ccr3.2779] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/03/2020] [Accepted: 02/12/2020] [Indexed: 11/17/2022] Open
Abstract
The present case report describes the clinical detection and root canal management of a rare middle mesial canal of a Japanese mandibular second molar by troughing preparation using an operating microscope and cone-beam computed tomography.
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Affiliation(s)
| | - Katsuhiro Takeda
- Department of Biological EndodonticsGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | | | - Satomi Shirawachi
- Department of Biological EndodonticsGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Tomoyuki Iwata
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Hidemi Kurihara
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Hideki Shiba
- Department of Biological EndodonticsGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
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11
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Kaneda-Ikeda E, Iwata T, Mizuno N, Nagahara T, Kajiya M, Takeda K, Hirata R, Ishida S, Yoshioka M, Fujita T, Kawaguchi H, Kurihara H. Periodontal ligament cells regulate osteogenesis via miR-299-5p in mesenchymal stem cells. Differentiation 2020; 112:47-57. [PMID: 31951879 DOI: 10.1016/j.diff.2020.01.001] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/29/2019] [Accepted: 01/06/2020] [Indexed: 01/08/2023]
Abstract
BACKGROUND The periodontal ligament contains periodontal ligament cells, which is a heterogeneous cell population, and includes progenitor cells that can differentiate into osteoblasts/cementoblasts. Mesenchymal stem cells (MSCs) can differentiate into various cells and can be used for periodontal regenerative therapy. Therefore, transplanted MSCs can be affected by humoral factors from periodontal ligament cells via the transcription factors or microRNAs (miRNAs) of MSCs. In addition, periostin (POSTN) is secreted from HPL cells and can regulate periodontal regeneration and homeostasis. To clarify the regulatory mechanism of humoral factors from periodontal ligament cells, we attempted to identify key genes, specifically microRNAs, involved in this process. METHODS Human MSCs (hMSCs) were indirectly co-cultured with human periodontal ligament cells (HPL cells) and then evaluated for osteogenesis, undifferentiated MSCs markers, and miRNA profiles. Furthermore, hMSCs were indirectly co-cultured with HPL cells in the presence of anti-POSTN monoclonal antibody (anti-POSTN Ab) to block the effect of POSTN from HPL cells, and then evaluated for osteogenesis or undifferentiated MSC markers. Moreover, hMSCs showed alterations in miRNA expression or cultured with HPL were challenged with POSTN during osteogenesis, and cells were evaluated for osteogenesis or undifferentiated MSC markers. RESULTS hMSCs co-cultured with HPL cells showed suppressed osteogenesis and characteristic expression of SOX11, an undifferentiated MSC marker, as well as miR-299-5p. Overexpression of miR-299-5p regulated osteogenesis and SOX11 expression as observed with indirect co-culture with HPL cells. Furthermore, MSCs co-cultured with HPL cells were recovered from the suppression of osteogenesis and SOX11 mRNA expression by anti-POSTN Ab. However, POSTN induced miR-299-5p and SOX11 expression, and enhanced osteogenesis. CONCLUSION Humoral factors from HPL cells suppressed osteogenesis in hMSCs. The suppressive effect was mediated by miR-299-5p and SOX11 in hMSCs.
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Affiliation(s)
- Eri Kaneda-Ikeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Tomoyuki Iwata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan.
| | - Noriyoshi Mizuno
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Takayoshi Nagahara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Mikihito Kajiya
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Katsuhiro Takeda
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan; Department of Biological Endodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Reika Hirata
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Shu Ishida
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Minami Yoshioka
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Tsuyoshi Fujita
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
| | - Hiroyuki Kawaguchi
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan; Department of Department of General Dentistry, Hiroshima University Hospital, Hiroshima, 734-8553, Japan
| | - Hidemi Kurihara
- Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, 734-8553, Japan
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12
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Nagahara T, Takeda K, Aida Y, Iwata T, Yagi R, Kurihara H, Shiba H. Combined endodontic and periodontal management of a class 3 invasive cervical resorption in a mandibular first molar. Clin Case Rep 2018; 6:2005-2010. [PMID: 30349717 PMCID: PMC6186875 DOI: 10.1002/ccr3.1785] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/04/2018] [Accepted: 08/08/2018] [Indexed: 11/17/2022] Open
Abstract
Dental radiography and cone-beam computed tomography revealed the left mandibular first molar in a 68-year-old female patient with Heithersay Class 3 invasive cervical resorption (ICR). The inhibition of ICR progression and environmental improvement in and around the affected tooth through combined endodontic and periodontal treatments led to a favorable clinical outcome.
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Affiliation(s)
- Takayoshi Nagahara
- Nippon Kokan Fukuyama HospitalHiroshimaJapan
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Katsuhiro Takeda
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Yusuke Aida
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Tomoyuki Iwata
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Ryoichi Yagi
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Hidemi Kurihara
- Department of Periodontal MedicineGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
| | - Hideki Shiba
- Department of Biological EndodonticsGraduate School of Biomedical and Health SciencesHiroshima UniversityHiroshimaJapan
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13
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Nomura M, Wada T, Ishibashi T, Komoriya T, Nagahara T, Chihara T. Development and inter-laboratory study of a method for quantifying zearalenone in pet foods. WORLD MYCOTOXIN J 2016. [DOI: 10.3920/wmj2014.1806] [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: 11/19/2022]
Abstract
An analytical method for quantifying zearalenone (ZEA) in pet foods using a liquid chromatograph-atmospheric pressure chemical ionization-mass spectrometer (LC-APCI-MS) was developed, and an inter-laboratory study was conducted. ZEA was extracted from pet food samples with aqueous acetonitrile. The extract was purified using a multifunctional column, MultiSep 226 Aflazon+, and analysed with LC-APCI-MS. The limit of quantification of ZEA by this method was estimated to be 0.2 mg/kg for dry and semi-dry pet foods, and 0.1 mg/kg for wet pet food. The calibration curve of ZEA for this method showed linearity in the range of 0.1-10 ng of ZEA (0.01-1.0 µg/ml, 0.04-4.0 mg/kg matrix). The mean recoveries, repeatabilities, reproducibilities, and the HorRats for ZEA from the inter-laboratory validation study were 99.0-102%, 2.2-3.0%, 5.6-6.6%, and 0.33-0.36, respectively.
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Affiliation(s)
- M. Nomura
- Food and Agricultural Materials Inspection Center, Fertilizer and Feed Inspection Department, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Wada
- Chemicals Evaluation and Research, Institute, Japan (CERI), Tokyo, Environmental Technology Department, 1600 Shimotakano, Sugito-machi, Kitakatsushika-gun, Saitama 345-0043, Japan
| | - T. Ishibashi
- Food and Agricultural Materials Inspection Center, Fertilizer and Feed Inspection Department, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Komoriya
- Food and Agricultural Materials Inspection Center, Fertilizer and Feed Inspection Department, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Nagahara
- Food and Agricultural Materials Inspection Center, Fertilizer and Feed Inspection Department, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Chihara
- Food and Agricultural Materials Inspection Center, Fertilizer and Feed Inspection Department, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
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14
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Nomura M, Ishibashi T, Komoriya T, Nagahara T, Chihara T. Development and inter-laboratory study of a method for quantification of fumonisin B1, B2 and B3 in pet foods. WORLD MYCOTOXIN J 2015. [DOI: 10.3920/wmj2013.1691] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An analytical method to determine fumonisin B1 (FB1), B2 (FB2) and B3 (FB3) in pet foods using a liquid chromatography-electrospray ionization-mass spectrometer (LC-ESI-MS) was developed, and an inter-laboratory study was conducted in eleven laboratories. FB1, FB2 and FB3 were extracted with aqueous acetonitrile. The extract was purified by a multifunctional column, MultiSep 211 Fum, and analysed by LC-ESI-MS. The limit of quantification of fumonisins was estimated to be 0.2 mg/kg for dry and semi-dry pet foods, and 0.1 mg/kg for wet pet food. The calibration curve showed linearity in the range of 0.1-5 ng of fumonisins (0.02-1.0 μg/ml). The values of the mean recovery for FB1 at 0.1-1.0 mg/kg were 93.3-107% and of the relative standard deviation less than 7.9%. These values were 87.3-102 and 8.6% for FB2 and 90.8-102 and 8.6% for FB3, respectively. The mean recovery, repeatability, reproducibility and the Horwitz ratio for FB1 from the inter-laboratory validation study were 92.9-98.9%, 2.6-4.6%, 6.8-10% and 0.41-0.54, respectively. The values for FB2 were 91.5-94.7%, 2.7-5.9%, 6.8-8.9% and 0.33-0.55, respectively, and the values for FB3 were 90.1-94.3%, 3.3-5.9%, 7.3-9.5% and 0.44-0.57, respectively.
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Affiliation(s)
- M. Nomura
- Fertilizer and Feed Inspection Department, Food and Agricultural Materials Inspection Center, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Ishibashi
- Fertilizer and Feed Inspection Department, Food and Agricultural Materials Inspection Center, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Komoriya
- Fertilizer and Feed Inspection Department, Food and Agricultural Materials Inspection Center, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Nagahara
- Fertilizer and Feed Inspection Department, Food and Agricultural Materials Inspection Center, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
| | - T. Chihara
- Fertilizer and Feed Inspection Department, Food and Agricultural Materials Inspection Center, Saitama Shintoshin National Government Building, Kensato Building, Shintoshin 2-1, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan
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15
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Fujita T, Yumoto H, Shiba H, Ouhara K, Miyagawa T, Nagahara T, Matsuda S, Kawaguchi H, Matsuo T, Murakami S, Kurihara H. Irsogladine maleate regulates epithelial barrier function in tumor necrosis factor-α-stimulated human gingival epithelial cells. J Periodontal Res 2011; 47:55-61. [DOI: 10.1111/j.1600-0765.2011.01404.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [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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16
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Tokunaga S, Koda M, Matono T, Sugihara T, Nagahara T, Ueki M, Murawaki Y, Kakite S, Yamashita E. Assessment of ablative margin by MRI with ferucarbotran in radiofrequency ablation for liver cancer: comparison with enhanced CT. Br J Radiol 2011; 85:745-52. [PMID: 21385915 DOI: 10.1259/bjr/64518148] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Our aim was to determine whether ablated liver parenchyma surrounding a tumour can be assessed by MRI with ferucarbotran administered prior to radiofrequency ablation (RFA) compared with enhanced CT. METHODS 55 hepatocellular carcinomas (HCCs) in 42 patients and 5 metastatic liver cancers in 3 patients were treated by RFA after ferucarbotran administration. We then performed T(2)* weighted MRI after 1 week and enhanced CT after 1 month. T(2)* weighted MRI demonstrated the ablated parenchyma as a low-intensity rim around the high intensity of the ablated tumour in these cases. The assessment was allocated to one of three grades: margin (+), high-intensity area with continuous low-intensity rim; margin zero, high-intensity area with discontinuous low-intensity rim; and margin (-), high-intensity area extending beyond the low-intensity rim. RESULTS Margin (+), margin zero and margin (-) were found in 17, 35 and 5 nodules, respectively. All 17 nodules with margin (+) and 13 of those with margin zero were assessed as having sufficient ablative margins on CT. The remaining 22 nodules with margin zero had insufficient margins on CT. The overall agreement between MRI and CT for the diagnosis of the ablative margin was moderate (κ = 0.507, p < 0.001). No local recurrence was found in 15 HCC nodules with margin (+), whereas local recurrence was found in 4 (11.8%) out of 34 HCC nodules with margin zero. CONCLUSION Administration of ferucarbotran before RFA enables the ablative margin to be visualised as a low-intensity rim, and also enables the evaluation of the ablative margin to be made earlier and more easily than with enhanced CT.
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Affiliation(s)
- S Tokunaga
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Tottori University School of Medicine, Yonago, Japan
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17
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Takeda K, Sakai N, Shiba H, Nagahara T, Fujita T, Kajiya M, Iwata T, Matsuda S, Kawahara K, Kawaguchi H, Kurihara H. Characteristics of high-molecular-weight hyaluronic acid as a brain-derived neurotrophic factor scaffold in periodontal tissue regeneration. Tissue Eng Part A 2011; 17:955-67. [PMID: 21091323 DOI: 10.1089/ten.tea.2010.0070] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF), for which bovine collagen-derived atelocollagen is used as a scaffold, enhances periodontal tissue regeneration. However, a scaffold that does not contain unknown ingredients is preferable. Since the synthesized high-molecular-weight (HMW)-hyaluronic acid (HA) is safe and inexpensive, we evaluated the efficacy of HMW-HA as a BDNF scaffold. CD44, a major receptor of HA, was expressed in cultures of human periodontal ligament cells, and HMW-HA promoted the adhesion and proliferation of human periodontal ligament cells, although it did not influence the mRNA expression of bone (cementum)-related proteins. The in vitro release kinetics of BDNF from HMW-HA showed that BDNF release was sustained for 14 days. Subsequently, we examined the effect of BDNF/HMW-HA complex on periodontal tissue regeneration in dogs. A greater volume of newly formed alveolar bone and a longer newly formed cementum were observed in the BDNF/HMW-HA group than in the HMW-HA group, suggesting that HMW-HA assists the regenerative capacity of BDNF, although HMW-HA itself does not enhance periodontal tissue regeneration. Neither the poly (lactic-co-glycolic acid) group nor the BDNF/poly (lactic-co-glycolic acid) group enhanced periodontal tissue regeneration. In conclusion, HMW-HA is an adequate scaffold for the clinical application of BDNF.
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Affiliation(s)
- Katsuhiro Takeda
- Division of Frontier Medical Science, Department of Periodontal Medicine, Hiroshima University Graduate School of Biomedical Sciences, Minami-ku, Hiroshima, Japan.
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18
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Mandai M, Koda M, Matono T, Nagahara T, Sugihara T, Ueki M, Ohyama K, Murawaki Y. Assessment of hepatocellular carcinoma by contrast-enhanced ultrasound with perfluorobutane microbubbles: comparison with dynamic CT. Br J Radiol 2010; 84:499-507. [PMID: 20959373 DOI: 10.1259/bjr/38682601] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVE The aim of this study was to evaluate tumour vascularity and Kupffer cell imaging in hepatocellular carcinoma (HCC) using contrast-enhanced ultrasonography (CEUS) with Sonazoid (perfluorobutane) and to compare performance with dynamic CT. METHODS We studied 118 nodules in 88 patients with HCC. HCC was diagnosed as a hyperenhancement lesion in the arterial phase with washout in the portal phase on dynamic CT or by percutaneous biopsy. We observed tumour vascularity at the early vascular phase (10-30 s after contrast injection) and Kupffer imaging at the post-vascular phase (after 10 min). RESULTS Detection of vascularity at the early vascular phase was 88% in nodules that were found to be hypervascular on dynamic CT and 28% in hypo-/isovascular nodules; the detection of local recurrence nodules was 92%. The detection of vascularity was significantly lower in nodules >9 cm deep than in those ≤9 cm deep, but was not affected by tumour size. The detection of tumours at the post-vascular phase on CEUS was 83% in nodules with low density in the portal phase on dynamic CT and 82% in nodules with isodensity. The rate did not depend on the severity of underlying liver disease; rates decreased in nodules deeper than 9 cm, those smaller than 2 cm in diameter and in iso-enhancing nodules at the early vascular phase of CEUS. CONCLUSION CEUS with Sonazoid is a useful tool for assessing the vascularity of HCC and is equal to that of dynamic CT; however, the detectability of HCC vascularity is affected by location.
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Affiliation(s)
- M Mandai
- Second Department of Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori, Japan
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19
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Mizuno N, Ozeki Y, Shiba H, Kajiya M, Nagahara T, Takeda K, Kawaguchi H, Abiko Y, Kurihara H. Humoral Factors Released From Human Periodontal Ligament Cells Influence Calcification and Proliferation in Human Bone Marrow Mesenchymal Stem Cells. J Periodontol 2008; 79:2361-70. [DOI: 10.1902/jop.2008.070577] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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20
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Furugohri T, Isobe K, Honda Y, Kamisato-Matsumoto C, Sugiyama N, Nagahara T, Morishima Y, Shibano T. DU-176b, a potent and orally active factor Xa inhibitor: in vitro and in vivo pharmacological profiles. J Thromb Haemost 2008; 6:1542-9. [PMID: 18624979 DOI: 10.1111/j.1538-7836.2008.03064.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Factor Xa (FXa), a key serine protease that converts prothrombin to thrombin in the coagulation cascade, is a promising target enzyme for the prophylaxis and treatment of thromboembolic diseases. DU-176b is a novel antithrombotic agent that directly inhibits FXa activity. OBJECTIVE To evaluate the in vitro pharmacological profiles and in vivo effects of DU-176b in animal models of thrombosis and bleeding. METHODS In vitro, FXa inhibition, specificity and anticoagulant activities were examined. Oral absorption was studied in rats and cynomolgus monkeys. In vivo effects were studied in rat and rabbit models of venous thrombosis and tail bleeding. RESULTS DU-176b inhibited FXa with Ki values of 0.561 nm for free FXa, 2.98 nm for prothrombinase, and exhibited >10 000-fold selectivity for FXa. In human plasma, DU-176b doubled prothrombin time and activated partial thromboplastin time at concentrations of 0.256 and 0.508 microm, respectively. DU-176b did not impair platelet aggregation by ADP, collagen or U46619. DU-176b was highly absorbed in rats and monkeys, as demonstrated by more potent anti-Xa activity and higher drug concentration in plasma following oral administration than a prototype FXa inhibitor, DX-9065a. In vivo, DU-176b dose-dependently inhibited thrombus formation in rat and rabbit thrombosis models, although bleeding time in rats was not significantly prolonged at an antithrombotic dose. CONCLUSIONS DU-176b is a more potent and selective FXa inhibitor with high oral bioavailability compared with its prototype, DX-9065a. DU-176b represents a promising new anticoagulant for the prophylaxis and treatment of thromboembolic diseases.
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Affiliation(s)
- T Furugohri
- Biological Research Laboratories I, R&D Division, Daiichi Sankyo Co., Ltd., Shinagawa-ku, Toyo, Japan
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Yamaoka H, Tsukuda M, Enomoto H, Kawai S, Mikami Y, Arai Y, Nagahara T, Mochimatsu I. [Effect of combination chemotherapy with nedaplatin and 5-FU for head and neck squamous cell carcinoma]. Gan To Kagaku Ryoho 2001; 28:1245-9. [PMID: 11579634] [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: 02/21/2023]
Abstract
Nedaplatin (254-S), which is a cisplatin (CDDP) analog, is an effective agent for head and neck squamous cell carcinoma (HNSCC). 254-S is expected to play an important role in neo-adjuvant chemotherapy (NAC) for HNSCC in place of CDDP. We have been using combination chemotherapy including CDDP, 5-FU, MTX and LV. The response rate and CR rate of this 4-drug combined chemotherapy are 87% and 33%. Thirty-six patients with HNSCC were treated with 5-FU, 800 mg/m2/day for 5 days and 254-S, 100 mg/m2 on day 4. Chemotherapy was discontinued in one patient because of allergic shock. Three patients showed a CR and 10 patients showed a PR. The response rate and CR rate of 254-S plus 5-FU chemotherapy were 37.1% and 8.6%. These were inferior to those with the 4-drug combined chemotherapy. Fourteen percent of patients showed grade 3 leukocytopenia, and 17% showed more than grade 3 thrombocytopenia. The effect of combination chemotherapy of 254-S and 5-FU was inferior to that of the previous chemotherapy including CDDP, 5-FU, MTX and LV. Further study or another combination therapy including 254-S will be essential for improving efficacy against HNSCC.
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Affiliation(s)
- H Yamaoka
- Dept. of Otorhinolaryngology, Yokohama City University School of Medicine
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22
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Ueda S, Masumori-Maemoto S, Ashino K, Nagahara T, Gotoh E, Umemura S, Ishii M. Angiotensin-(1-7) attenuates vasoconstriction evoked by angiotensin II but not by noradrenaline in man. Hypertension 2000; 35:998-1001. [PMID: 10775575 DOI: 10.1161/01.hyp.35.4.998] [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: 11/16/2022]
Abstract
Angiotensin-(1-7) has been suggested to be a novel vasodilating peptide. We investigated the direct vascular effect of angiotensin-(1-7) in human forearm resistant vessels, particularly with regard to the interaction with angiotensin II, in healthy normotensive men by strain-gauge venous occlusion plethysmography with intra-arterial infusions of peptides. Intra-arterial infusion of angiotensin-(1-7) at 0.1 to 2000 pmol/min did not cause vasodilatation but rather reduced forearm blood flow by approximately 10% at the highest dose. A placebo-controlled study showed that angiotensin-(1-7) at 0.5 to 40 nmol/min caused weak but significant vasoconstriction (P=0.0016 by ANOVA). Angiotensin-(1-7) at 100 pmol/min, but not at 10 pmol/min, significantly shifted the angiotensin II dose-response curve toward the right (mean+/-SD of percent changes in forearm blood flow: -19+/-17%, -33+/-22%, -55+/-12%, -63+/-10%, and -68+/-5% at 5, 10, 25, 50, and 100 pmol/min of angiotensin II, respectively, with saline; 5+/-13%, 0. 9+/-18%, -40+/-16%, -54+/-9%, and -61+/-6% with angiotensin-(1-7), P=0.0021 by ANOVA). Angiotensin-(1-7) did not affect the dose-response curve of noradrenaline [3+/-12%, 5+/-16%, -20+/-22%, -31+/-18%, and -40+/-12% at 25, 50, 100, 300, and 600 pmol/min of noradrenaline, respectively, with saline; -4+/-15%, -2+/-23%, -29+/-22%, -34+/-16%, and -42+/-9% with angiotensin-(1-7)]. Our results suggest that angiotensin-(1-7) antagonizes vasoconstriction by angiotensin II in human resistant vessels and might act as an endogenous angiotensin II antagonist.
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Affiliation(s)
- S Ueda
- Department of Medicine II, Yokohama City University School of Medicine, Yokohama, Japan.
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Iwashita K, Nagahara T, Kimura H, Takano M, Shimoi H, Ito K. The bglA gene of Aspergillus kawachii encodes both extracellular and cell wall-bound beta-glucosidases. Appl Environ Microbiol 1999; 65:5546-53. [PMID: 10584016 PMCID: PMC91756 DOI: 10.1128/aem.65.12.5546-5553.1999] [Citation(s) in RCA: 43] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We cloned the genomic DNA and cDNA of bglA, which encodes beta-glucosidase in Aspergillus kawachii, based on a partial amino acid sequence of purified cell wall-bound beta-glucosidase CB-1. The nucleotide sequence of the cloned bglA gene revealed a 2,933-bp open reading frame with six introns that encodes an 860-amino-acid protein. Based on the deduced amino acid sequence, we concluded that the bglA gene encodes cell wall-bound beta-glucosidase CB-1. The amino acid sequence exhibited high levels of homology with the amino acid sequences of fungal beta-glucosidases classified in subfamily B. We expressed the bglA cDNA in Saccharomyces cerevisiae and detected the recombinant beta-glucosidase in the periplasm fraction of the recombinant yeast. A. kawachii can produce two extracellular beta-glucosidases (EX-1 and EX-2) in addition to the cell wall-bound beta-glucosidase. A. kawachii in which the bglA gene was disrupted produced none of the three beta-glucosidases, as determined by enzyme assays and a Western blot analysis. Thus, we concluded that the bglA gene encodes both extracellular and cell wall-bound beta-glucosidases in A. kawachii.
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Affiliation(s)
- K Iwashita
- National Research Institute of Brewing, 7-3-1, Kagamiyama, Higashihiroshima, Hiroshima 739-0046, Japan.
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24
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Yoshida T, Matsuda H, Hayashida Y, Gono Y, Nagahara T, Kawakami T, Takenaka T, Tsukuda M, Kusakabe T. Changes in the distribution of the substance P and calcitonin gene-related peptide immunoreactive nerve fibers in the laryngeal mucosa of chronically hypoxic rats. Histol Histopathol 1999; 14:735-41. [PMID: 10425542 DOI: 10.14670/hh-14.735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The distribution and abundance of substance P (SP) and calcitonin gene-related peptide (CGRP) immunoreactive nerve fibers in four different regions of the laryngeal mucosa were compared between normoxic and chronically hypoxic rats (10% O2 and 3.0-4.0% CO2 for 3 months). In the chronically hypoxic laryngeal mucosa, the number of SP and CGRP fibers within and just beneath the epithelium, and around the laryngeal gland was increased in comparison with those in the normoxic controls. Especially in the epiglottic and arytenoid regions, the number of intraepithelial SP fibers was increased remarkably. Most intraepithelial SP and CGRP fibers penetrated into the epithelium to extend to the luminal surface. There was no distinct difference in the distribution and abundance of these peptidergic fibers in the mucosa of the normoxic and chronically hypoxic vocal cord regions. These results suggest that the increased density of SP and CGRP fibers within the epithelium of the upper laryngeal mucosa is a predominant feature of hypoxic adaptation, and this may be involved in airway protection, swallowing, and other functions in the chronically hypoxic environment. In addition, the increased SP and CGRP fibers around the laryngeal gland suggest an enhanced mucous secretion, and this may participate in the airway defense mechanism in low O2 conditions.
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Affiliation(s)
- T Yoshida
- Department of Otorhinolaryngology, Yokohama City University School of Medicine, Japan
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25
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Yamaoka H, Tsukuda M, Mochimatsu I, Nagahara T, Enomoto H, Kagata H, Kagesato Y, Daicho S, Mizuno H, Nishimura G, Baba Y, Kawakami K. [Thymidylate synthase expression in patients with hypopharyngeal carcinoma]. Gan To Kagaku Ryoho 1998; 25:1007-12. [PMID: 9644315] [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: 02/07/2023]
Abstract
We analyzed the relationship between clinical response to neo-adjuvant chemotherapy including 5-fluorouracil (5-FU) in patients with hypopharyngeal carcinoma (HPC) and thymidylate synthase (TS) expression in their tumors. TS expression was evaluated with immunohistochemical staining techniques on biopsy specimens from HPC patients. TS immunostaining was divided into four levels (TS0-TS3) according to its level and pattern. The relationship between prognosis, tumor size, nodal status, differentiation of tumor cells and TS expression were also investigated. There was a statistically significant association between the level of TS expression and tumor size (p < 0.01). In terms of the effectiveness of chemotherapy, tumor differentiation, nodal status and prognosis, a statistical difference was not found in TS expression. These results suggest that the level of TS expression may show the degree of tumor proliferation, but may not necessarily be useful to obtain a response to chemotherapy including other drugs, e.g., cisplatin and other derivatives of platinum.
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Affiliation(s)
- H Yamaoka
- Dept. of Otolaryngology, Yokohama City University School of Medicine
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26
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Ishigami T, Umemura S, Tamura K, Hibi K, Nyui N, Kihara M, Yabana M, Watanabe Y, Sumida Y, Nagahara T, Ochiai H, Ishii M. Essential hypertension and 5' upstream core promoter region of human angiotensinogen gene. Hypertension 1997; 30:1325-30. [PMID: 9403548 DOI: 10.1161/01.hyp.30.6.1325] [Citation(s) in RCA: 62] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The angiotensinogen (AGT) gene M235T variant is associated with essential hypertension and elevated plasma AGT concentrations, although the underlying mechanisms are unknown. Recent studies have suggested that AGCE 1 (human AGT gene core promoter element 1) located in the 5' upstream core promoter region (position -25 to -1) of the human AGT gene has an important part in the expression of AGT mRNA by binding with transcription factor AGCF 1 (human AGT gene core promoter element binding factor 1), and a mutation at -20 from adenine to cytosine (A-20C) increases the level of expression of this transcript. We therefore examined subjects with this mutation to study the association with increased plasma AGT concentrations and with essential hypertension. One hundred eighty-eight subjects receiving no antihypertensive medication were examined with regard to the correlation between A-20C and plasma AGT concentrations, and 234 subjects were studied with respect to the association between A-20C and essential hypertension. A-20C was determined by polymerase chain reaction-restriction fragment length polymorphism analysis with EcoOR 109I. Multiple regression analysis showed a weak but significant correlation between A-20C and plasma AGT concentrations (P=.047) and essential hypertension (P=.049). The results suggest that A-20C may underlie the increase in plasma AGT concentrations and be involved in the development of essential hypertension.
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Affiliation(s)
- T Ishigami
- Second Department of Internal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
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Nagahara T, Ishigami T, Sano T, Ikeda Y, Hibi K, Uneda S, Umemura S, Ishii M. Angiotensin-converting enzyme gene insertion/deletion polymorphism and left ventricular hypertrophy in hemodialysis patients. Jpn Heart J 1997; 38:821-30. [PMID: 9486935 DOI: 10.1536/ihj.38.821] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The relationships between angiotensin-converting enzyme (ACE) gene insertion (I) / deletion (D) polymorphism and left ventricular hypertrophy induced by hypertension or idiopathic hypertrophic cardiomyopathy have been studied. However, little is known about the association between this polymorphism and left ventricular hypertrophy induced by volume overload. The relationship between left ventricular hypertrophy and the ACE gene I/D polymorphism was examined in 80 maintenance hemodialysis patients (mean age: 60.1+/-1.4 <SEM> years). Multivariate regression analysis showed that the left ventricular mass index calculated by M-mode echocardiography was associated with serum creatinine (p = 0.040), male gender (p = 0.027), antihypertensive drug treatment (p = 0.026), weight gain between hemodialysis (p = 0.018) and mean blood pressure after hemodialysis (p=0.010), but not with ACE I/D genotype (p = 0.69). These findings suggest that although hemodialysis patients seem to be under volume overload, ACE genotype may not be involved in their left ventricular hypertrophy. Hypertension and other factors related to renal failure are involved in the left ventricular hypertrophy in chronic hemodialysis patients.
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Affiliation(s)
- T Nagahara
- Second Department of Internal Medicine, Yokohama Minami Kyosai Hospital, Japan
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Matsuda H, Kusakabe T, Kawakami T, Nagahara T, Takenaka T, Tsukuda M. Neuropeptide-containing nerve fibres in the human parotid gland: a semiquantitative analysis using an antibody against protein gene product 9.5. Histochem J 1997; 29:539-44. [PMID: 9279556 DOI: 10.1023/a:1026471825125] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The occurrence and distribution of neuropeptide-containing fibres in the human parotid gland were examined by the peroxidase-antiperoxidase method with attention to the quality of fixation and the condition of patients. Many fibres immunoreactive for neuropeptide Y (NPY) and vasoactive intestinal polypeptide (VIP) and a moderate number of galanin-positive (GAL) fibres were distributed around the acini. A moderate number of NPY and VIP fibres were distributed around the intercalated ducts. The semiquantitative mean densities (+/- SD) of periacinar NPY, VIP and GAL fibres expressed as a percentage of the total protein gene product (PGP) 9.5 immunoreactive fibres were 75.62 +/- 7.25%, 70.52 +/- 9.33% and 41.76 +/- 5.45%, respectively, whereas those of substance P (SP), calcitonin gene-related peptide (CGRP) and FMRF amide (FMRF) fibres were below 10%. The mean densities of NPY and VIP fibres around the intercalated ducts expressed as the percentage of PGP 9.5 fibres associated with these ducts were 52.37 +/- 6.19% and 59.62 +/- 7.02% respectively. Those of SP, CGRP, GAL, and FMRF fibres were below 10%. The densities of NPY, VIP, SP, CGRP, GAL and FMRF fibres around the striated and excretory ducts were also below 10%. In the vasculature, NPY fibres were the most prominent. Similarly, the mean density of perivascular NPY fibres was 93.76 +/- 2.03%. No somatostatin or leucine or methionine enkephalin immunoreactivity was detected around the acini, duct system or blood vessels. These findings suggest that, in this gland, the periacinar NPY, VIP and GAL fibres may participate in regulating the synthesis of saliva and its secretion and that perivascular peptidergic fibres, especially NPY fibres, may be involved in controlling local blood flow.
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Affiliation(s)
- H Matsuda
- Department of Otorhinolaryngology, Yokohama City University School of Medicine, Japan
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29
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Matsuda H, Kusakabe T, Kohno H, Nagahara T, Furukawa M, Sawada H, Kawakami T, Takenaka T, Tsukuda M. Peptidergic innervation in human von Ebner's glands: an immunohistochemical study. Acta Otolaryngol 1997; 117:447-51. [PMID: 9199533 DOI: 10.3109/00016489709113419] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The occurrence and distribution of several neuropeptides were studied in human von Ebner's glands. Immunoreactivity for substance P, calcitonin gene-related peptide, vasoactive intestinal polypeptide (VIP), neuropeptide Y (NPY), galanin, and somatostatin was found in the nerve fibers around the acini, ducts, and blood vessels. VIP-immunoreactive varicose fibers were numerous compared with the other five neuropeptides. Most NPY fibers were associated with the vasculature in the gland. These findings suggest that the neuropeptides may regulate the secretion and vascular tone in human von Ebner's glands.
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Affiliation(s)
- H Matsuda
- Department of Otorhinolaryngology, Yokohama City University School of Medicine, Kanazawa-ku, Yokohama, Japan
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Takamatsu I, Ogahara N, Fujimoto M, Nagahara T, Tsukuda M. [Two pediatric cases of facial palsy caused by masked mastoiditis]. Nihon Jibiinkoka Gakkai Kaiho 1996; 99:985-90. [PMID: 8776971 DOI: 10.3950/jibiinkoka.99.985] [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] [Indexed: 02/02/2023]
Abstract
Two children with otogenic facial palsy are reported. The tympanic membranes of a 15-month-old boy and a girl of the same age were hyperemic, dull, and bulging, and the children suffered from masked mastoiditis. The facial palsy had not been improved by myringotomy, and parenteral administration of antibiotics and steroids. Finally, tympanomastoidectomy and facial nerve decompression was performed and a tympanostomy tube was inserted. Both patients completely recovered facial nerve function within two months after the operation. On the basis of the results of those operations tympanomastoidectomy and the facial nerve decompression may become necessary in such cases as those caused by masked mastoiditis.
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31
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Ohta A, Siraishi F, Nagahara T, Tomura K. [Neutron activation analysis of biological samples]. Nihon Rinsho 1996; 54:207-14. [PMID: 8587192] [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: 01/31/2023]
Abstract
Multi-element analysis by neutron activation analysis (NAA) in respect to medical applications is discussed. Examples of trace element determinations in pathological human liver tissues, human serum, and rat liver are given. A very sensitive method for determining fluorinated drug in very small samples of human serum by neutron activation is also described. Each biological samples (ca. 100-200 mg, lyophilized matter) was irradiated for short time (10 s or 5 min.) and for long time (24 hrs) in Rikkyo University Research Reactor or Musashi Institute of Technology Research Reactor. Concentration of 12 elements (127I, 55Mn, 26Mn, 65Cu, 23Na, 41K, 37Cl, 27Al, 48Ca, 36S, 58Fe, 64Zn) in human pathological liver, Futraful (19F) (anti-cancer fluorinated drug) clearance of human serum, and calcium uptake (48Ca) in liver of rats were determined by NAA.
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Affiliation(s)
- A Ohta
- Department of Radiology, Kitasato University School of Medicine
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32
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Takamatsu I, Ogahara N, Tsuchiya K, Nagahara T, Yamashita K, Tsukuda M. [A study on the reliability of evoked response audiometry in infants below one year of age; a long-term follow-up]. Nihon Jibiinkoka Gakkai Kaiho 1995; 98:1373-1380. [PMID: 8523165 DOI: 10.3950/jibiinkoka.98.1373] [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] [Indexed: 05/22/2023]
Abstract
The reliability of brainstem evoked response audiometry (ERA) as an objective audiometric study was evaluated in long term follow-up infants with moderate to severe sensorineural hearing loss. None of the infants had either brain damage (cerebral palsy, mental retardation) or other severe complications (genetic diseases). The thresholds of ERA at 1 kHz and 4 kHz were measured in 234 infants below one year of age, from 1983 to 1990, in our hospital. These infants were followed-up to the age when conditioned oriented response audiometry (COR) and play audiometry could be conducted. Pure tone thresholds obtained by COR and play audiometry were compared with those of ERA. In addition, speech problems in these patients were evaluated. In all of those infants, hearing aids were fitted before one year of age to achieve early habilitation. As a results, ERA was found to be a reliable and efficacious test for determining auditory thresholds, and providing hearing aids for early habilitation in one-year old infants with moderate to severe sensorineural hearing loss.
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Nagahara T, Matsuda H, Kadota T, Kishida R. Development of substance P immunoreactivity in the mouse vomeronasal organ. Anat Embryol (Berl) 1995; 192:107-15. [PMID: 7486007 DOI: 10.1007/bf00185999] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We investigated the development of substance P immunoreactivity in mouse vomeronasal organs in embryos, juveniles, and adults. In all stages, substance P fibers were found in the receptor-free epithelial area, but never in the neuroepithelium. Substance P fibers were found sparsely in the lamina propria of 15-day-old embryos. Although buds of the vomeronasal glands in the cavernous tissue were observed in 17-day-old embryos, and gradually grew in size and numbers, the substance P fibers around them decreased after about the 13th day. Thus, substance P may be a trophic factor for the development of the vomeronasal glands in the cavernous tissue. We first recognized substance P fibers reaching the surface of the receptor-free epithelium in 13-day-old pups. In 21-day-old mice, substance P fibers were as well developed as in adult mice. Considering the development of the substance P fibers in the receptor-free epithelium and the cavernous tissue, they probably cause the vasodilation of the cavernous tissue via local axon reflexes. These structures may then act as a defense system, eliminating noxious stimulus substances sucked into the vomeronasal organ.
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Affiliation(s)
- T Nagahara
- Department of Otorhinolaryngology, Yokohama City University School of Medicine, Japan
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Katakura S, Nagahara T, Hara T, Kunitada S, Iwamoto M. Molecular model of an interaction between factor Xa and DX-9065a, a novel factor Xa inhibitor: Contribution of the acetimidoylpyrrolidine moiety of the inhibitor to potency and selectivity for serine proteases. Eur J Med Chem 1995. [DOI: 10.1016/0223-5234(96)88248-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nagahara T, Yokoyama Y, Inamura K, Katakura S, Komoriya S, Yamaguchi H, Hara T, Iwamoto M. Dibasic (amidinoaryl)propanoic acid derivatives as novel blood coagulation factor Xa inhibitors. J Med Chem 1994; 37:1200-7. [PMID: 8164262 DOI: 10.1021/jm00034a018] [Citation(s) in RCA: 165] [Impact Index Per Article: 5.5] [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: 01/29/2023]
Abstract
Since activated factor X (FXa) is a coagulant enzyme that generates thrombin and participates in both intrinsic and extrinsic coagulation pathways, inhibition of FXa may be more effective than inactivation of thrombin for interrupting blood coagulation. To assess the possible effectiveness of FXa inhibition as an anticoagulant, we designed and synthesized 3-(amidinoaryl)-2-[4-[(3S)-3-pyrrolidinyloxy]phenyl]propanoi c acid derivatives as low molecular weight, nonpeptidic, orally active FXa inhibitors. These derivatives exhibited potent and highly selective anti-FXa activity in vitro and anticoagulant activity on oral administration. The most promising compound, (2S)-2-[4-[[(3S)-1-acetimidoyl-3-pyrrolidinyl]oxy]phenyl]- 3-(7-amidino-2-naphthyl)propanoic acid hydrochloride pentahydrate (4,DX-9065a), inhibited 50% of FXa activity (IC50) at 0.07 microM, doubled plasma recalcification time (PRCT) at 0.5 microM, and significantly prolonged activated partial thromboplastin time (APTT) at a dose of 100 mg/kg on oral administration. In contrast with FXa inhibition, 4 showed no activity against thrombin (IC50 > 2000 microM).
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Affiliation(s)
- T Nagahara
- Research Institute, Daiichi Pharmaceutical Company, Ltd., Tokyo, Japan
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37
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Hara T, Yokoyama A, Ishihara H, Yokoyama Y, Nagahara T, Iwamoto M. DX-9065a, a new synthetic, potent anticoagulant and selective inhibitor for factor Xa. Thromb Haemost 1994; 71:314-9. [PMID: 8029795] [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: 01/28/2023]
Abstract
DX-9065a is an orally active newly synthesized and specific inhibitor for factor Xa. We have examined the property of DX-9065a in vitro and ex vivo. DX-9065a prolonged human plasma recalcification time, APTT and PT. Its doubling concentrations for clotting times of each coagulation assay were 0.49, 0.97 and 0.52 microM, respectively. Kinetic study revealed that DX-9065a inhibited competitively human factor Xa (Ki value: 41 nM). Ki values (microM) for other human serine proteases were as follows; thrombin > 2000, trypsin 0.62, chymotrypsin > 2000, plasmin 23, t-PA 21, plasma kallikrein 2.3 and tissue kallikrein 1000. DX-9065a up to 100 microM had no effects on human platelet aggregation. After intravenous or oral administration, DX-9065a significantly prolonged APTT and PT with a dose dependent manner. These effects were well correlated with anti-Xa activity in plasma. These results suggest that DX-9065a may become an anticoagulant by means of the specific inhibition of factor Xa.
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Affiliation(s)
- T Hara
- Exploratory Research Laboratories II, Daiichi Pharmaceutical Co., Ltd., Tokyo, Japan
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Katakura S, Nagahara T, Hara T, Iwamoto M. A novel factor Xa inhibitor: structure-activity relationships and selectivity between factor Xa and thrombin. Biochem Biophys Res Commun 1993; 197:965-72. [PMID: 8267636 DOI: 10.1006/bbrc.1993.2573] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A series of 3-amidinoaryl-2-[4-[ [(3S)-3-pyrrolidinyl]oxy]phenyl] propanoic acids have been investigated for development of a novel factor Xa inhibitor, possessing a potent inhibitory activity for factor Xa and a selectivity for factor Xa compared to thrombin. In order to study the structure-activity relationships and the selectivity, models of factors Xa complexes formed with the inhibitors were constructed on the basis of X-ray crystallographic data of a trypsin-inhibitor complex. The models showed that the binding mode of the inhibitors to the S1 pocket of the enzyme accounted for the structure-activity relationships and that the difference between Gln192 of factor Xa and Glu192 of thrombin had a key role in the selectivity.
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Affiliation(s)
- S Katakura
- Exploratory Research Laboratories 2, Daiichi Pharmaceutical Co., Ltd., Tokyo, Japan
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Tsukuda M, Nagahara T, Mikami Y, Yago T, Matsuda H, Yanoma S. A tumor cell line producing granulocyte colony-stimulating factor and an immune suppressive factor. Biotherapy 1993; 6:217-23. [PMID: 7507346 DOI: 10.1007/bf01878083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
From a patient, both a cell line incapable of secreting granulocyte colony-stimulating factor (G-CSF) (TC873) and a cell line capable of secreting G-CSF (TCM902) were established. The effector cells induced, with TC873 cells showed a high lytic capacity against two types of tumor cells. The effector cells induced by TCM902 cells did not show such capacity. Furthermore, the TCM902 cells excreted a factor suppressing the proliferation of lymphokine activated killer (LAK) cells and the autologous tumor cell lysis of tumor associated lymphocytes. This factor probably is TFG-beta 1.
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Affiliation(s)
- M Tsukuda
- Department of Otorhinolaryngology, Yokohama City University, School of Medicine, Kanagawa, Japan
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Tsukuda M, Nagahara T, Yago T, Matsuda H, Yanoma S. Production of granulocyte colony-stimulating factor by head and neck carcinomas. Biotherapy 1993; 6:183-7. [PMID: 7507344 DOI: 10.1007/bf01878079] [Citation(s) in RCA: 12] [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: 01/25/2023]
Abstract
Detectable levels of G-CSF by enzyme-linked immunosorbent assay (ELISA) were found in sera of 4 out of 15 patients with head and neck carcinomas. Also cells prepared from the tumors of these 4 patients secreted G-CSF. The supernatants of cells derived from all 15 patients did not contain granulocyte-monocyte CSF, monocyte CSF, tumor necrosis factor-alpha, transforming growth factor-beta 1, epidermal growth factor, interleukin (IL)-1 beta and IL-6. These findings suggest that leukocytosis in patients with carcinomas might be due to the production of G-CSF by tumor cells.
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Affiliation(s)
- M Tsukuda
- Department of Otorhinolaryngology, Yokohama City University, School of Medicine, Kanagawa, Japan
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41
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Sakaue K, Niboshi M, Nagahara T, Sano N, Terauchi H. Growth and structure of single crystal copper/nickel superlattices. Acta Crystallogr A 1993. [DOI: 10.1107/s0108767378090972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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42
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Tsukuda M, Mochimatsu I, Nagahara T, Kokatsu T, Sawaki S, Kubota A, Furkawa M, Arai Y. Clinical application of recombinant human erythropoietin for treatments in patients with head and neck cancer. Cancer Immunol Immunother 1993; 36:52-6. [PMID: 8422668 PMCID: PMC11038830 DOI: 10.1007/bf01789131] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/1992] [Accepted: 07/08/1992] [Indexed: 01/30/2023]
Abstract
The therapeutic effects of intravenous recombinant human erythropoietin (r-hEPO) administration on anemia induced by radiation therapy (3 cases), chemotherapy (18 cases) and combined therapies (5 cases) in patients with head and neck malignancies were examined. The effectiveness was evaluated by the changes in the hemoglobin concentration examined before and after the r-hEPO administration. The r-hEPO administration combined with anticancer therapies improved anemia induced by all three treatments. The therapeutic effectiveness of r-hEPO injection was also noted on anemia induced by all of four different chemotherapeutic regimens that have been ordinarily used for head and neck malignancies. Furthermore, the efficacy of the different dose schedules, 3000 IU (12 cases) or 6000 IU (14 cases), three times a week, was compared. Both of the r-hEPO dose schedules were effective for anemia, but the efficacy of 6000 IU was superior to that of 3000 IU. No significant changes were observed in the number of white blood cells and platelets and the results of biochemical examinations after the r-hEPO injection. There were no objective side-effects related to the r-hEPO administration. These results suggest that anemia induced by chemotherapy and/or radiotherapy could be prevented by r-hEPO administration. The addition of r-hEPO to anticancer therapies would make it possible to pursue the planned therapeutic schedules, prevent the decrease of immunity after allogeneic blood transfusion and bring about an-improvement in the prognosis of patients with malignancies.
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Affiliation(s)
- M Tsukuda
- Department of Otorhinolaryngology, Yokohama City School of Medicine, Japan
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43
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Nakamura M, Yamaguchi T, Isshiki T, Nagahara T, Itaoka Y, Saeki F. [Efficacy of intracoronary thrombolysis versus percutaneous transluminal coronary angioplasty for treating acute myocardial infarction]. J Cardiol 1992; 22:607-16. [PMID: 1343626] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
The usefulness of percutaneous transluminal coronary angioplasty (PTCA) in patients with evolving myocardial infarction remains controversial. We retrospectively assessed the efficacy of PTCA on myocardial salvage in acute myocardial infarction in comparison with the efficacy of intracoronary thrombolysis (ICT). Sixty-two patients with initial anteroseptal myocardial infarction who had been treated within 6 hrs after the onset of chest pain were categorized into 4 groups: 1) spontaneous recanalization: n = 14, 2) successful PTCA: n = 25 (this group was further subdivided into 2 groups: direct PTCA group, primary PTCA without prior ICT: n = 19; and rescue PTCA group, PTCA after unsuccessful ICT: n = 6), 3) successful ICT group (n = 12), and 4) unsuccessful recanalization group (n = 11). Left ventricular function in the chronic phase was assessed by contrast ventriculography using the global ejection fraction (EF) and regional wall motion (RWM) was assessed by the centerline method. Patients with recanalization had a significantly higher EF than did those without (62 +/- 12 vs 50 +/- 13%, p < 0.01). The mean EFs for groups with successful reperfusion were as follows: 65 +/- 8% for the spontaneous recanalization group, 61 +/- 14% for PTCA group (64 +/- 13% for direct PTCA group, 51 +/- 13% for rescue PTCA group) and 60 +/- 12% for the ICT group. The EFs for the spontaneous recanalization group and the direct PTCA group were significantly greater than that for the rescue PTCA group. The time to reperfusion and the thrombolysis in myocardial infarction (TIMI) flow grade before reperfusion did not affect the preservation of global left ventricular function. RWM of the infarcted area in patients with recanalization were less hypokinetic than that in patients without (p < 0.01). The mean RWM (SD/chord) in the successfully reperfused groups were -2.3 +/- 1.2 for the spontaneous recanalization group, -2.6 +/- 1.2 for the PTCA group (-2.3 +/- 1.1 for the direct PTCA group, -3.3 +/- 1.0 for rescue PTCA group) and -3.0 +/- 0.5 for the ICT group. Hypokinesis of the infarcted area was more severe in the rescue PTCA group than in the spontaneous recanalization group and the direct PTCA group (multiple comparison test p < 0.01, respectively), and hypokinesis was more severe in the ICT group than in the direct PTCA group (Student's t-test, p < 0.05).(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- M Nakamura
- Center for Cardiovascular Disease, Mitsui Memorial Hospital, Tokyo
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44
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Kitagawa M, Yamamoto K, Katakura S, Kanno H, Yamada K, Nagahara T, Tanaka M. Aryloxyacetic acid diuretics with uricosuric activity. II. Substituted [(4-oxo-4H-1-benzopyran-7-yl)oxy]acetic acids and the related compounds. Chem Pharm Bull (Tokyo) 1991; 39:2681-90. [PMID: 1806291 DOI: 10.1248/cpb.39.2681] [Citation(s) in RCA: 19] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Di- and tri-substituted [(4-oxo-4H-1-benzopyran-7-yl)oxy]acetic acids, and 4-oxo-3-phenyl-4H-furo[2,3-h]-[1]benzopyran-8-carboxylic acid were synthesized and tested for natriuretic and uricosuric activities. Among the compounds tested, 3,5-disubstituted [(4-oxo-4H-1-benzopyran-7-yl)oxy]acetic acids (6c-f, h, n and x) showed potent natriuretic and uricosuric activities, whereas 4-oxo-3-phenyl-4H-furo[2,3-h][1]benzopyran-8-carboxylic acid (6dd) possessed only potent natriuretic activity. The structure-activity relationships are also discussed.
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Affiliation(s)
- M Kitagawa
- Research Institute, Daiichi Pharmaceutical Co., Ltd., Tokyo, Japan
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Isshiki T, Yamaguchi T, Nakamura M, Saeki F, Itaoka Y, Nagahara T, Furuta Y, Ikari Y, Wanibuchi Y, Suma H. Postoperative angiographic evaluation of gastroepiploic artery grafts: technical considerations and short-term patency. Cathet Cardiovasc Diagn 1990; 21:233-8. [PMID: 2276193 DOI: 10.1002/ccd.1810210405] [Citation(s) in RCA: 23] [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] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Follow-up angiography was performed in 37 patients with right gastroepiploic artery (GEA) grafts at 27 +/- 32 days postoperatively. By the femoral approach, a 5F cobra or twist catheter was advanced selectively into the gastroduodenal artery (GDA) over a plastic-coated guidewire. In 29 patients, the GDA was successfully catheterized, and the GEA grafts were clearly visualized by the injection of 3-7 ml of contrast medium. GDA catheterization was unsuccessful in 8 patients, but in 4 of them the grafts were well visualized when 15-20 ml of contrast was injected. In the other 4 patients, visualization of the GEA grafts was poor, but the distal portions were outlined by retrograde perfusion from the native right coronary arteries. A total of 34 GEA grafts were patent (92%), and the diameters of these grafts were adequate when compared with respective recipient coronary arteries (2.8 +/- 0.9 and 2.3 +/- 0.6 mm, respectively; P less than .05). No complications were noted except for transient vasospasm (3 patients) in the GEA, hepatic artery, or both, which was relieved by the intra-arterial injection of isosorbide dinitrate (2.5 mg). Thus, the over-the-wire technique allows simple and safe GDA catheterization, which is essential for obtaining good visualization of GEA grafts.
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Affiliation(s)
- T Isshiki
- Division of Cardiology, Mitsui Memorial Hospital, Tokyo, Japan
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Inoue T, Mohri N, Nagahara T, Takanashi R. A case report of "lipomatous hypertrophy of the cardiac interatrial septum", with a proposal for a new term "lipomatous hamartoma of the cardiac atrial septum". Acta Pathol Jpn 1988; 38:1583-9. [PMID: 2467515 DOI: 10.1111/j.1440-1827.1988.tb02298.x] [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: 01/01/2023]
Abstract
An autopsy case of "lipomatous hypertrophy of the cardiac interatrial septum" (LHIS) combined with marked stenosis and calcification of the aortic and mitral valves due to fibrous valvular endocarditis, malignant lymphoma, and mucin-producing cancer of the pancreas is reported. LHIS and mucin-producing cancer of the pancreas were incidental findings at autopsy. Microscopically, the LHIS in this case consisted of proliferation of mature fat cells, brown fat cells and cardiac muscle cells. Since these three cell types are normal structural components of the interatrial septum, it was considered that the LHIS was a hamartomatous rather than hypertrophic lesion, of the cardiac atrial septum. Accordingly it was concluded that the term "lipomatous hamartoma of the cardiac atrial septum" was more appropriate for this lesion in the case presented here. As far as we know, this is the first reported case of LHIS in Japan.
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Affiliation(s)
- T Inoue
- Department of Pathology, Tokyo University Hospital, Japan
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47
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Nagahara T, Suzuki M, Kasuga K. Chloroacetylation or bromoacetylation on the methine carbon of an asymmetrical quadridentate schiff base copper(II) complex. Inorganica Chim Acta 1988. [DOI: 10.1016/s0020-1693(00)86081-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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48
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Sato M, Takemura M, Atarashi S, Higashi K, Nagahara T, Furukawa M, Ikeuchi T, Osada Y. Modification of the cysteamine side chain of thienamycin. III. J Antibiot (Tokyo) 1987; 40:1292-302. [PMID: 3479415 DOI: 10.7164/antibiotics.40.1292] [Citation(s) in RCA: 12] [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: 01/06/2023]
Abstract
Thienamycin derivatives (4) having a cyclic amidine moiety at the C-2 position were prepared. The susceptibility to renal dehydropeptidase-1 and the antimicrobial activity of these compounds were determined. Their structure-activity relationships are also discussed.
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Affiliation(s)
- M Sato
- Laboratory of Medicinal Chemistry, Daiichi Seiyaku Co., Ltd., Tokyo, Japan
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49
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Sato M, Takemura M, Atarashi S, Higashi K, Fujiwara H, Nagahara T, Furukawa M, Ikeuchi T, Ozawa S, Nishizawa N. Modification of the cysteamine side chain of thienamycin. II. J Antibiot (Tokyo) 1987; 40:483-95. [PMID: 3583917 DOI: 10.7164/antibiotics.40.483] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A new type of thienamycin derivatives (3a-3j, 4a, 4b), having a monothioacetal or a thioacetal side chain at the C-2 position was prepared, and the susceptibility to renal dehydropeptidase-1 (DHP-1) and the antimicrobial activity of these compounds were determined. The structure-activity relationships of these derivatives are also discussed.
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50
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Ejima A, Hayano T, Ebata T, Nagahara T, Koda H, Tagawa H, Furukawa M. Synthesis and antimicrobial activity of cephalosporins with a 1-pyridinium substituent carrying a 5-membered heterocycle at the C-3 position. J Antibiot (Tokyo) 1987; 40:43-8. [PMID: 3558117 DOI: 10.7164/antibiotics.40.43] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A series of potent antimicrobial agents have been prepared. These derivatives are cephalosporins carrying a pyridine ring substituted with a heterocycle in the C-3 position. Some of them showed excellent activity not only against Gram-negative organisms including Pseudomonas aeruginosa but also against Gram-positive ones. In view of their biological and physico-chemical properties, 7 beta-[2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-[4-(2 or 5-oxazolyl)-1-pyridinium]methyl-3-cephem-4-carboxylate 8f (DQ-2522) and 8g (DQ-2556) were chosen as candidates for further evaluation.
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