1
|
Nishida K, Harada R, Nasu Y, Naniwa S, Nakahara R, Hotta Y, Shimizu N, Lin D, Ozaki T. Influence of Janus kinase inhibitors on early postoperative complications in patients with rheumatoid arthritis undergoing orthopaedic surgeries. Mod Rheumatol 2024; 34:466-473. [PMID: 37279573 DOI: 10.1093/mr/road047] [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: 03/28/2023] [Revised: 04/30/2023] [Accepted: 05/16/2023] [Indexed: 06/08/2023]
Abstract
OBJECTIVE We retrospectively reviewed the records of rheumatoid arthritis (RA) patients who underwent orthopaedic surgery to examine the influence of the perioperative use of Janus kinase (JAK) inhibitors on early postoperative complications. PATIENTS AND METHODS Thirty-two patients with RA under disease control with JAK inhibitors who underwent 49 orthopaedic procedures were included in the study. Patient records after surgery were investigated for surgical site infection (SSI), delayed wound healing (DWH), a flare-up of the disease, preoperative and postoperative absolute lymphocyte counts (ALCs), venous thromboembolism, and other postoperative complications. RESULTS JAK inhibitors were continued during the perioperative period in 31 procedures. In the remaining 18 procedures, JAK inhibitors were discontinued perioperatively with a mean discontinuation period of 2.4 days. No instances of SSI were identified in any patient during at least 90 days' follow-up, while DWH was seen in one patient. Disease flare-up was noted in two patients after 3 and 9 days of discontinuation of JAK inhibitors, respectively. The ALCs significantly decreased on postoperative Day 1 (P < .0001), and there was a significant correlation between pre- and post-one-day ALCs (r = 0.75, P < .0001). CONCLUSION JAK inhibitors seem to be safe during the perioperative period of orthopaedic surgery.
Collapse
Affiliation(s)
- Keiichiro Nishida
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Ryozo Harada
- Department of Orthopaedic Surgery, Kurashiki Sweet Hospital, Okayama, Japan
| | - Yoshihisa Nasu
- Department of Orthopaedic Surgery, Okayama University Hospital, Okayama, Japan
| | - Shuichi Naniwa
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Ryuichi Nakahara
- Department of Orthopaedic Surgery, Okayama University Hospital, Okayama, Japan
| | - Yoshifumi Hotta
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Noriyuki Shimizu
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Deting Lin
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| |
Collapse
|
2
|
Kaneda D, Nishida K, Nasu Y, Nakahara R, Harada R, Hotta Y, Naniwa S, Ozaki T. High Fracture Rate of AVANTA Silicone Implant Following Arthroplasty of the Thumb MCP Joint of Rheumatoid Arthritis Patients with Boutonniere Deformities. Acta Med Okayama 2024; 78:71-78. [PMID: 38419317 DOI: 10.18926/amo/66673] [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] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
We retrospectively investigated the mid-term outcomes of arthroplasty using the AVANTA silicone implant for thumb metacarpophalangeal (MCP) joints with boutonniere deformity in patients with rheumatoid arthritis (RA). This study involved 36 thumbs of 33 RA patients with a mean follow-up period of 5.1 years (range, 2.0-13.3). Postoperatively, the mean extension was significantly increased and the mean flexion was significantly decreased (p<0.001, p<0.001, respectively), resulting in the mean arc of range of motion (ROM) shifting in the direction of extension after surgery. Implant fracture was observed in 10 thumbs (28%), and 4 of these (11%) underwent revision surgery. The survivorship with implant fracture and revision surgery as endpoints were 73.4% and 91.8% at 5 years, respectively. The preoperative arc of ROM and the postoperative flexion range of the implant-fracture group were significantly greater than those in the no-implant-fracture group (p=0.039, 0.034, respectively). These results suggest the importance of patient education and careful rehabilitation to prevent excessive flexion. Overall, the AVANTA silicone implant showed a relatively high rate of implant fracture at our institute.
Collapse
Affiliation(s)
- Daisuke Kaneda
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
- Department of Orthopaedic Surgery, Kurashiki Daiichi Hospital
| | | | - Yoshihisa Nasu
- Department of Orthopaedic Surgery, Okayama University Hospital
| | | | - Ryozo Harada
- Department of Orthopaedic Surgery, Kurashiki Sweet Hospital
| | - Yoshifumi Hotta
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Shuichi Naniwa
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| |
Collapse
|
3
|
Hotta Y, Nishida K, Yoshida A, Nasu Y, Nakahara R, Naniwa S, Shimizu N, Ichikawa C, Lin D, Fujiwara T, Ozaki T. Inhibitory Effect of a Tankyrase Inhibitor on Mechanical Stress-Induced Protease Expression in Human Articular Chondrocytes. Int J Mol Sci 2024; 25:1443. [PMID: 38338721 PMCID: PMC10855100 DOI: 10.3390/ijms25031443] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024] Open
Abstract
We investigated the effects of a Tankyrase (TNKS-1/2) inhibitor on mechanical stress-induced gene expression in human chondrocytes and examined TNKS-1/2 expression in human osteoarthritis (OA) cartilage. Cells were seeded onto stretch chambers and incubated with or without a TNKS-1/2 inhibitor (XAV939) for 12 h. Uni-axial cyclic tensile strain (CTS) (0.5 Hz, 8% elongation, 30 min) was applied and the gene expression of type II collagen a1 chain (COL2A1), aggrecan (ACAN), SRY-box9 (SOX9), TNKS-1/2, a disintegrin and metalloproteinase with thrombospondin motifs-5 (ADAMTS-5), and matrix metalloproteinase-13 (MMP-13) were examined by real-time PCR. The expression of ADAMTS-5, MMP-13, nuclear translocation of nuclear factor-κB (NF-κB), and β-catenin were examined by immunocytochemistry and Western blotting. The concentration of IL-1β in the supernatant was examined by enzyme-linked immunosorbent assay (ELISA). TNKS-1/2 expression was assessed by immunohistochemistry in human OA cartilage obtained at the total knee arthroplasty. TNKS-1/2 expression was increased after CTS. The expression of anabolic factors were decreased by CTS, however, these declines were abrogated by XAV939. XAV939 suppressed the CTS-induced expression of catabolic factors, the release of IL-1β, as well as the nuclear translocation of NF-κB and β-catenin. TNKS-1/2 expression increased in mild and moderate OA cartilage. Our results demonstrated that XAV939 suppressed mechanical stress-induced expression of catabolic proteases by the inhibition of NF-κB and activation of β-catenin, indicating that TNKS-1/2 expression might be associated with OA pathogenesis.
Collapse
Affiliation(s)
- Yoshifumi Hotta
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Keiichiro Nishida
- Locomotive Pain Center, Okayama University Hospital, Okayama 700-8558, Japan
| | - Aki Yoshida
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Yoshihisa Nasu
- Department of Orthopaedic Surgery, Okayama University Hospital, Okayama 700-8558, Japan
| | - Ryuichi Nakahara
- Department of Orthopaedic Surgery, Okayama University Hospital, Okayama 700-8558, Japan
| | - Shuichi Naniwa
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Noriyuki Shimizu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Chinatsu Ichikawa
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Deting Lin
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Tomohiro Fujiwara
- Department of Orthopaedic Surgery, Okayama University Hospital, Okayama 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| |
Collapse
|
4
|
Mori T, Hotta Y, Kataoka T, Matsumoto S, Yamamoto T, Kimura K. Filtrated bone marrow-derived stem cell lysate may improve erectile function through nerve regeneration in a rat model of cavernous nerve injury. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
5
|
Matsuhashi M, Nishida K, Nasu Y, Nakahara R, Watanabe M, Hotta Y, Ozaki T. SAT0010 ANTI-CD30 IMMUNOTHERAPY AMELIORATES BONE AND CARTILAGE DESTRUCTION IN EXPERIMENTAL MODEL OF RHEUMATOID ARTHRITIS IN MICE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:CD30 is a member of the TNF-receptor family and commonly expressed on lymphocytes of Hodgkin lymphoma and anaplastic large cell lymphoma. It has been reported that levels of soluble CD30 in serum and joint fluid is significantly elevated in rheumatoid arthritis (RA). Although RA patients may develop lymphoproliferative disorders (LPD) as a result of immunosuppression by MTX or bDMARDs, safety medications after the regression of LPD for RA have not yet been established.Objectives:To explore the potential of CD30 targeting therapy for RA.Methods:(1) Immuno-histological staining of CD30 was performed for fresh synovial tissues of RA and osteoarthritis (OA). In addition, double immunofluorescence staining of CD30 with CD3, CD20, CD68, CD138 were performed on RA synovial tissue. (2) Brentuximab vedotin (BV) is an anti-CD30 antibody conjugated with monomethyl auristatin E, designed to induce apoptosis of CD30 expressing cells. A multiple myeloma cell line (RPMI8226) was used as a non-lymphoma cell line and plasma cell-like cell line. Immuno-cytological staining for CD30 was performed on RPMI8226. Cells were cultured and harvested on days 0, 1, and 3 to evaluate the effects of BV (50 μl / ml per well). Cytospin specimens were stained by May-Grunwald-Giemsa (MGG) staining for cell counting and by FIFC-terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining for detection of apoptosis. (3) Collagen antibody induced arthritis (CAIA) was induced in DBA/1 mice by arthritogenic cocktail of monoclonal antibodies against type II collagen. BV was administered to the treatment groups (30mg/kg and 70mg/kg n=4 each) and evaluated clinical score, histological findings and levels of SAA, IL-6, and TNFα in serum by ELISA. Student’st-test (two-tailed) was used to determine statistical significance for analysis of synovial tissues and cell line assay. Two way ANOVA with Dunnett’s post hoc analysis was used for multiple comparisons of mice model.Results:(1) The number of CD30-positive cells was significantly higher in RA synovial tissue than in OA synovial tissue (p<0.01) (Fig. 1). CD30-positive cells were detected around the lymphoid follicles. Double immunofluorescence showed CD30 and CD138 double-positive cells in the synovial tissue of RA, suggesting CD30 is predominantly expressed by plasma cells. (2) RPMI8226 cells expressed CD30. BV caused apoptosis of RPMI8226 cells, and the number of cells treated with BV decreased to 95% compared to controls. (3) All control mice (n=4) developed severe arthritis, and their scores reached a peak (score: 13.3) on day 10. In the mice of treatment group of 30 mg/kg, paw swelling was slightly decreased, their clinical score reached a peak (score: 9.3) on day 10. In contrast, paw swelling was significantly reduced in the 70 mg/kg treatment group. The peak of the clinical score was 4.3 on day 10 (Fig.2). Histological score evaluated synovitis with infiltration of inflammatory cells, pannus formation, and erosion of bone and cartilage. Histological score of hind paws were 3.0 ± 0.8 for the control group, 2.7 ± 1.0 for 30 mg/kg group, and 0.7 ± 1.1 for 70 mg/kg group (p<0.01), respectively. The serum levels of SAA and IL-6 of treatment group were lower than those of no treatment group (p<0.01).Conclusion:We showed the expression of CD30 on synovial tissue of RA and the expression of CD30 on plasma cells. In addition, the current study provides the first evidence that BV depletion of CD30-positive cells suppressed arthritis and osteochondral destruction in CAIA mice. Our results may provide an important clue for the development of an effective treatment for RA with iatrogenic immunodeficiency-related LPD.Disclosure of Interests:Minami Matsuhashi: None declared, Keiichiro Nishida Grant/research support from: K. Nishida has received scholarship donation from CHUGAI PHARMACEUTICAL Co., Eisai Co., Mitsubishi Tanabe Pharma and AbbVie GK., Speakers bureau: K. Nishida has received speaking fees from CHUGAI PHARMACEUTICAL Co., Eli Lilly, Janssen Pharmaceutical K.K., Eisai Co. and AYUMI Pharmaceutical Corporation., Yoshihisa Nasu: None declared, Ryuichi Nakahara: None declared, Masahito Watanabe: None declared, Yoshifumi Hotta: None declared, Toshifumi Ozaki: None declared
Collapse
|
6
|
Hotta Y, Nasu Y, Nishida K, Matsuhashi M, Watanabe M, Nakahara R, Ozaki T. SAT0068 THE RECENT INCIDENCE OF SURGICAL SITE INFECTION AND DELAYED WOUND HEALING AFTER ELECTIVE ORTHOPAEDIC SURGERIES FOR PATIENTS WITH RHEUMATOID ARTHRITIS WHO TREATED WITH B/TSDMARDS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:In Japan, Methotrexate (MTX) has been approved in 1999, the first biologic DMARD (bDAMRD) in 2003, and the Janus kinase (JAK) inhibitors have been used since 2013. Although it is expected that the recent advancement of drug therapy would contribute the decrease in the incidence of orthopaedic surgeries by preventing structural damages1, 2), we are still facing a considerable number of patients who require surgical interventions3).Objectives:To investigate the recent trends of patient’s background who underwent the orthopaedic surgery for rheumatoid arthritis, number of orthopaedic intervention, and the type of the surgery.Methods:We reviewed the records of 1569 patients with RA who underwent orthopedic surgeries between 2004 and 2019 in our institution. The mean age of patients was 62.8 (22-88) years-old with disease duration of 20.9 (0.5-64) years. Data of these patients such as age, disease duration, medication (Glucocorticoid; GC, MTX, b/tsDMARD), type of surgeries (total joint replacement; TJR, hand surgery, foot surgery, spine surgery, and others), and preoperative serum CRP level were collected. We analyzed the annual change of these demographic and clinical data. Then, we compared them between CRP negative (<1.5g/l) and CRP positive group. Cochran-Armitage trend test,χ square test, or unpaired T-test was performed for statistical analysis. P <0.05 was considered significant.Results:Among all cases, 426 cases (27.2%) were treated with b/tsDMARDs at the time of operation. MTX and GC were used in 937 cases (59.7%) and 1015 cases (64.7%), respectively. The mean age and disease duration of RA showed an increasing trend, although the CRP level was dramatically decreased during the study period. While the rate of MTX use has not changed significantly (p=0.102), the number of cases treated by b/ts DMARD increased significantly to 46.7% (p<0.001). In contrast, the rate of GC use dicreased significantly (p<0.001). Although the annual number of surgeries have not changed, the proportion of cases who performed TJR decreased dramatically (59.6% in 2011, 29.5% in 2019), and the surgeries for hand and foot increased significantly (p<0.001) (Fig 1). The annual mean preoperative CRP level also decreased from 18.8±1.95 to 4.89±0.81 (Fig2). Compared to CRP positive group (n=1,113), the patients in CRP negative group (n=446) showed significantly younger age(p<0.001), shorter disease duration (p=0.031), lower late of GC use, and a higher rate of b/tsDAMRD use. The proportion of patients who underwent TJR was significantly higher in CRP positive group (p<0.001).Conclusion:Along with the increasing use of b/tsDMARD, the preoperative disease control of RA, as well as the type of demanded surgeries have dramatically changed.References:[1] Yamanaka H, Tanaka E, Nakajima A, et al. A large observational cohort study of rheumatoid arthritis, IORRA: Providing context for today’s treatment options.Mod Rheumatol2020;30:1-6.[2] Matsumoto T, Nishino J, Izawa N, et al. Trends in Treatment, Outcomes, and Incidence of Orthopedic Surgery in Patients with Rheumatoid Arthritis: An Observational Cohort Study Using the Japanese National Database of Rheumatic Diseases.J Rheumatol2017;44:1575-82.[3] Momohara S, Tanaka S, Nakamura H, et al. Recent trends in orthopedic surgery performed in Japan for rheumatoid arthritis.Mod Rheumatol2011;21:337-42.Disclosure of Interests:Yoshifumi Hotta: None declared, Yoshihisa Nasu: None declared, Keiichiro Nishida Grant/research support from: K. Nishida has received scholarship donation from CHUGAI PHARMACEUTICAL Co., Eisai Co., Mitsubishi Tanabe Pharma and AbbVie GK., Speakers bureau: K. Nishida has received speaking fees from CHUGAI PHARMACEUTICAL Co., Eli Lilly, Janssen Pharmaceutical K.K., Eisai Co. and AYUMI Pharmaceutical Corporation., Minami Matsuhashi: None declared, Masahito Watanabe: None declared, Ryuichi Nakahara: None declared, Toshifumi Ozaki: None declared
Collapse
|
7
|
Watanabe M, Nishida K, Nasu Y, Nakahara R, Matsuhashi M, Hotta Y, Ozaki T. SAT0023 THE ROLE OF ADAM12 UPREGULATED PROLIFERATION OF SYNOVIAL MEMBRANE IN RHEUMATOID ARTHRITIS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:ADAM12 is a member of a disintegrin and metalloproteinase family and has been reported to participate in the development of a variety of tumors by degrading ECM and shed precursors, thus promoting cell proliferation, invasion, and metastasis1). Additionally, ADAM12 is involved in chondrocyte differentiation from osteoarthritis (OA) patients by regulation of TGFβ1-induced IGF-1 and RUNX-2 expressions2). However, there is no report on the role of ADAM12 for rheumatoid arthritis (RA).Objectives:To investigate the expression and role of ADAM12 in the synovial tissue of RA.Methods:(1) The expression of ADAM12 in synovial tissues from RA (18 cases), OA (5 cases) and healthy control (HC) (3 cases) was examined by immunohistochemistry. The synovial tissues of HC were obtained during surgery of hemiarthroplasty for bone tumors. Three researchers evaluated the positive cell ratio. The samples were scored according to the percentage of positive staining: 0 points (weak positive, positive expression was less than 5%), 1 point (moderate positive, positive expression was between 5% and 50%) and 2 points (strong positive, positive expression was greater than 50%). In addition, the samples were scored according to the staining intensity: 0 points (weak intensity), 1 point (moderate intensity) and 2 points (high intensity). (2) The cultured synovial fibroblasts obtained from RA patients at the surgery (RASF) were stimulated by TNFα (1, 5, 10 ng/mL), TGFβ1 (1, 5, 10 ng/mL), PDGF-BB (1, 5, 10 ng/mL) and TNFα+TGFβ1+PDGF-BB (all 10 ng/mL), and the expression levels of ADAM12 relative mRNA was examined by real-time PCR. (3) siADAM12 was transfected in RASF, and the proliferation was examined by WST-1 assay, and the expression of ADAM12 protein was examined by western blotting.Results:(1) ADAM12 positive cells were found in synovial lining cells, plasma cells, and vascular endothelial cells. ADAM12 was highly expressed in RA synovial tissues. The immunostaining scores of RA, OA, and HC were 3.9±0.01, 1.9±0.27, and 0.8±0.18, respectively. (2) Stimulation by TNFα, TGFβ1, and PDGF-BB resulted in the upregulation of the expression of ADAM12 relative mRNA in RASF, and TGFβ1 stimulation notably tended to increase the expression by about 5 to 6 times. (3) siADAM12 successfully suppressed the expression of ADAM12 protein and simultaneously suppressed the proliferation of RASF.Conclusion:ADAM12 might be involved in the pathogenesis of RA, promoting the cell proliferation of RASF.References:[1] Kyeiborg M, Albrechtsen R, Couchman J, et al., Cellular roles of ADAM12 in health and disease, Int J Biochem Cell Biol, 2008[2] Masahiro H, Keiichiro N, Joe H, et al., Involvement of ADAM12 in Chondrocyte Differentiation by Regulation of TGF-beta1-Induced IGF-1 and RUNX-2 Expressions, Calcif Tissue Int, 2019Disclosure of Interests:Masahito Watanabe: None declared, Keiichiro Nishida Grant/research support from: K. Nishida has received scholarship donation from CHUGAI PHARMACEUTICAL Co., Eisai Co., Mitsubishi Tanabe Pharma and AbbVie GK., Speakers bureau: K. Nishida has received speaking fees from CHUGAI PHARMACEUTICAL Co., Eli Lilly, Janssen Pharmaceutical K.K., Eisai Co. and AYUMI Pharmaceutical Corporation., Yoshihisa Nasu: None declared, Ryuichi Nakahara: None declared, Minami Matsuhashi: None declared, Yoshifumi Hotta: None declared, Toshifumi Ozaki: None declared
Collapse
|
8
|
Hotta Y, Nasu Y, Nishida K, Matsuhashi M, Watanabe M, Nakahara R, Ozaki T. FRI0523 THE RECENT TREND OF ORTHOPAEDIC SURGERIES FOR RHEUMATOID ARTHRITIS. AN ANALYSIS OF 1569 CASES FROM 2004 TO 2019. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:In Japan, Methotrexate (MTX) has been approved in 1999, the first biologic DMARD (bDAMRD) in 2003, and the Janus kinase (JAK) inhibitors have been used since 2013. Although it is expected that the recent advancement of drug therapy would contribute the decrease in the incidence of orthopaedic surgeries by preventing structural damages1, 2), we are still facing a considerable number of patients who require surgical interventions3).Objectives:To investigate the recent trends of patient’s background who underwent the orthopaedic surgery for rheumatoid arthritis, number of orthopaedic intervention, and the type of the surgery.Methods:We reviewed the records of 1569 patients with RA who underwent orthopedic surgeries between 2004 and 2019 in our institution. The mean age of patients was 62.8 (22-88) years-old with disease duration of 20.9 (0.5-64) years. Data of these patients such as age, disease duration, medication (Glucocorticoid; GC, MTX, b/tsDMARD), type of surgeries (total joint replacement; TJR, hand surgery, foot surgery, spine surgery, and others), and preoperative serum CRP level were collected. We analyzed the annual change of these demographic and clinical data. Then, we compared them between CRP negative (<1.5g/l) and CRP positive group. Cochran-Armitage trend test,χ square test, or unpaired T-test was performed for statistical analysis. P <0.05 was considered significant.Results:Among all cases, 426 cases (27.2%) were treated with b/tsDMARDs at the time of operation. MTX and GC were used in 937 cases (59.7%) and 1015 cases (64.7%), respectively. The mean age and disease duration of RA showed an increasing trend, although the CRP level was dramatically decreased during the study period. While the rate of MTX use has not changed significantly (p=0.102), the number of cases treated by b/ts DMARD increased significantly to 46.7% (p<0.001). In contrast, the rate of GC use dicreased significantly (p<0.001). Although the annual number of surgeries have not changed, the proportion of cases who performed TJR decreased dramatically (59.6% in 2011, 29.5% in 2019), and the surgeries for hand and foot increased significantly (p<0.001) (Fig 1). The annual mean preoperative CRP level also decreased from 18.8±1.95 to 4.89±0.81 (Fig 2). Compared to CRP positive group (n=1,113), the patients in CRP negative group (n=446) showed significantly younger age(p<0.001), shorter disease duration (p=0.031), lower late of GC use, and a higher rate of b/tsDAMRD use. The proportion of patients who underwent TJR was significantly higher in CRP positive group (p<0.001).Conclusion:Along with the increasing use of b/tsDMARD, the preoperative disease control of RA, as well as the type of demanded surgeries have dramatically changed.References:[1] Yamanaka H, Tanaka E, Nakajima A, et al. A large observational cohort study of rheumatoid arthritis, IORRA: Providing context for today’s treatment options.Mod Rheumatol2020;30:1-6.[2] Matsumoto T, Nishino J, Izawa N, et al. Trends in Treatment, Outcomes, and Incidence of Orthopedic Surgery in Patients with Rheumatoid Arthritis: An Observational Cohort Study Using the Japanese National Database of Rheumatic Diseases.J Rheumatol2017;44:1575-82.[3] Momohara S, Tanaka S, Nakamura H, et al. Recent trends in orthopedic surgery performed in Japan for rheumatoid arthritis.Mod Rheumatol2011;21:337-42.Disclosure of Interests:Yoshifumi Hotta: None declared, Yoshihisa Nasu: None declared, Keiichiro Nishida Grant/research support from: K. Nishida has received scholarship donation from CHUGAI PHARMACEUTICAL Co., Eisai Co., Mitsubishi Tanabe Pharma and AbbVie GK., Speakers bureau: K. Nishida has received speaking fees from CHUGAI PHARMACEUTICAL Co., Eli Lilly, Janssen Pharmaceutical K.K., Eisai Co. and AYUMI Pharmaceutical Corporation., Minami Matsuhashi: None declared, Masahito Watanabe: None declared, Ryuichi Nakahara: None declared, Toshifumi Ozaki: None declared
Collapse
|
9
|
Mori T, Hotta Y, Kataoka T, Matumoto S, Yamamoto T, Kimura K. HP-1-4 Filtrated Bone Marrow-Derived Mesenchymal Stem Cell Lysate Improves Erectile Function in a Rat Model of Cavernous Nerve Injury. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2020.04.113] [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: 11/30/2022]
|
10
|
Mori T, Hotta Y, Kataoka T, Kimura K. PO-01-059 Association between stress from overwork and penile fibrosis: A study with a rat model of stress. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.03.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
11
|
Kataoka T, Sanagawa A, Suzuki J, Muto T, Hotta Y, Kawade Y, Maeda Y, Tohkin M, Kimura K. PO-01-040 Influence of anticancer agents on erectile function: A study of erectile responses to anticancer agents in rats after analysis of FDA adverse event reporting system. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.03.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
12
|
Hotta Y, Nishikawa A, Ieda N, Kataoka T, Nakagawa H, Kimura K. HP-01-005 Regulation of the relaxation of the corpus cavernosum by a near-infrared light-controlled NO donor in in vivo and in vitro studies. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.03.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Kataoka T, Sanagawa A, Suzuki J, Muto T, Kawade Y, Hotta Y, Maeda Y, Tohkin M, Kimura K. PS-06-005 The mechanisms of erectile dysfunction after administration of anticancer agents in rats. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.03.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
14
|
Okamoto R, Taniguchi M, Onishi Y, Kumagai N, Uraki J, Fujimoto N, Hotta Y, Sasaki K, Furuta N, Fujii E, Yano Y, Yamada N, Ogura T, Takei Y, Ito M. 5971Predictors of the results of the confirmatory tests for the diagnosis of primary hyperaldosteronism in hypertensive patients with an aldosterone-to-renin ratio greater than 20. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.5971] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- R Okamoto
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - M Taniguchi
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - Y Onishi
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - N Kumagai
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - J Uraki
- Mie University Graduate School of Medicine, Department of Radiology, Tsu, Japan
| | - N Fujimoto
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - Y Hotta
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - K Sasaki
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - N Furuta
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - E Fujii
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - Y Yano
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - N Yamada
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| | - T Ogura
- Mie University Hospital, Clinical Research Support Center, Tsu, Japan
| | - Y Takei
- Mie University Graduate School of Medicine, Department of Diabetes, Metabolism and Endocrinology, Tsu, Japan
| | - M Ito
- Mie University Graduate School of Medicine, Department of Cardiology and Nephrology, Tsu, Japan
| |
Collapse
|
15
|
Kataoka T, Hotta Y, Maeda Y, Kimura K. 026 Testosterone deficiency causes endothelial dysfunction via elevation of asymmetric dimethylarginine (ADMA) and oxidative stress in castrated rats. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
16
|
Hotta Y, Ieda N, Kataoka T, Maeda Y, Nakagawa H, Kimura K. 030 Light-controlled relaxation of rat penile corpus cavernosum by a novel NO donor, NO-Rosa. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Mori T, Hotta Y, Nakamura D, Yahagi R, Kataoka T, Maeda Y, Kawade Y, Kimura K. 035 The mechanisms of stress-induced erectile dysfunction; a focus on regulators of contraction and relaxation in the corpus cavernosum by using a rat model of water immersion-restraint stress. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.039] [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: 11/27/2022]
|
18
|
Kawauchi H, Aoi N, Morikura I, Fuchiwaki T, Shimizu Y, Shimizu K, Hotta Y, Infei Q, Yamada T, Prokopakis E. Oxatomide inhibits Interleukin-8 release from respiratory epithelial cells. RHINOL 2018. [DOI: 10.4193/rhinol/18.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
|
19
|
Kataoka T, Hotta Y, Maeda Y, Kimura K. 140 Influence of Anti-Cancer Agent Oxaliplatin Oxaliplatin on Erectile Function in Rats. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
20
|
Nakamura D, Hotta Y, Yahagi R, Kataoka T, Maeda Y, Kawade Y, Kimura K. 141 The Prognosis in Erectile Dysfunction After Cessation Of Excessive Fructose Consumption From Childhood: A Rat Study. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
21
|
Hotta Y, Nakamura D, Iida Y, Takahashi S, Kataoka T, Maeda Y, Kawade Y, Kimura K. 417 Spontaneously Diabetic Torii Fatty Rats do not Show Erectile Dysfunction Under High-Blood Glucose Levels in a Preliminary Study: The Importance of Model Selection. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.295] [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: 11/25/2022]
|
22
|
Hayasaka M, Ogasawara H, Hotta Y, Tsukagoshi K, Kimura O, Kura T, Tarumi T, Muramatsu H, Endo T. Nutritional assessment using stable isotope ratios of carbon and nitrogen in the scalp hair of geriatric patients who received enteral and parenteral nutrition formulas. Clin Nutr 2016; 36:1661-1668. [PMID: 27847116 DOI: 10.1016/j.clnu.2016.10.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 10/14/2016] [Accepted: 10/17/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND & AIMS The δ13C and δ15N values in the scalp hair of geriatric patients in Japan who received the enteral or parenteral nutrition formula were measured to assess nutritional status. METHODS The relations among δ13C, δ15N, calorie intake, BMI, albumin concentration, total cholesterol (T-CHO) and geriatric nutritional risk index (GNRI) in the patients were investigated. Furthermore, the enrichment of δ13C and δ15N from the nutrients to the hair was investigated. RESULTS The δ13C values in the hair of patients who received enteral nutrition decreased with decreases in the calories received, while the δ15N values increased, suggesting malnutrition in some patients with a low calorie intake due to a negative nitrogen balance. The distribution of patients with a low calorie intake (below 20 kcal/kg/day) when δ13C was plotted against δ15N differed from that of control subjects, but the distribution of patients with a high calorie intake (above 20 kcal/kg/day) was similar to that of control subjects. No significant differences were observed in BMI, albumin concentration, T-CHO or GNRI between the low and high calorie groups. The enrichment of δ13C and δ15N from the enteral nutrients to the hair were inversely correlated with the δ13C and δ15N in the enteral nutrients. The enrichment levels of δ13C and δ15N tended to be higher and lower, respectively, in the high calorie group. On the other hand, the δ13C and δ15N values in the hair of patients who received parenteral nutrition were higher and lower than those in the control subjects and in the patients who received enteral nutrition, respectively, reflecting the higher δ13C and lower δ15N contents of the parenteral nutrients. CONCLUSIONS The δ13C and δ15N values in the hair of patients who received enteral nutrition may be effective indicators for evaluating the long-term nutritional status of geriatric patients. A calorie intake of 20 kcal/kg/day may be a cut-off value for malnutrition in Japanese geriatric patients receiving enteral nutrition. However, caution is necessary when dealing with patients switching from parental nutrition as parenteral nutrition resulted in different changes in δ13C and δ15N. The enrichment levels of δ13C and δ15N from the enteral nutrients to the hair may be inversely correlated with the δ13C and δ15N values of enteral nutrients and vary according to the calorie intake.
Collapse
Affiliation(s)
- M Hayasaka
- Sapporo Higashi-Tokushukai Hospital, N33-E14, Higashi-ku, Sapporo, Hokkaido 065-0033, Japan
| | - H Ogasawara
- Sapporo Minami-Seishu Hospital, 1-2-20, Satozuka, Kiyota-Ku, Sapporo, Hokkaido 004-0801, Japan
| | - Y Hotta
- Hokusei Hospital, W3-2-10, Sinkawa, Kita-Ku, Sapporo, Hokkaido 001-0933, Japan
| | - K Tsukagoshi
- Hijirigaoka Hospital, 214-22, Funaoka, Date, Hokkaido 052-0014, Japan
| | - O Kimura
- School of Pharmaceutical Science, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido 061-0293, Japan
| | - T Kura
- Naganuma Municipal Hospital, 2-2-1 Chuo, Naganuma, Yubari, Hokkaido 069-1332, Japan
| | - T Tarumi
- Hokusei Hospital, W3-2-10, Sinkawa, Kita-Ku, Sapporo, Hokkaido 001-0933, Japan
| | - H Muramatsu
- Rumoi City Hospital, 2-16 Shinonome, Rumoi, Hokkaido 077-8511, Japan
| | - T Endo
- School of Pharmaceutical Science, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido 061-0293, Japan.
| |
Collapse
|
23
|
Hotta Y, Nakamura D, Yahagi R, Kataoka T, Maeda Y, Kawade Y, Kimura K. PS-04-005 Inhibition of advanced glycation end products prevents erectile dysfunction caused by excessive administration of fructose from childhood in rats. J Sex Med 2016. [DOI: 10.1016/j.jsxm.2016.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
24
|
|
25
|
Nakanishi H, Ohtsubo M, Iwasaki S, Hotta Y, Mizuta K, Mineta H, Minoshima S. Identification of 11 novel mutations in USH2A among Japanese patients with Usher syndrome type 2. Clin Genet 2009; 76:383-91. [PMID: 19737284 DOI: 10.1111/j.1399-0004.2009.01257.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Usher syndrome (USH) is an autosomal recessive disorder characterized by retinitis pigmentosa and hearing loss. USH type 2 (USH2) is the most common type of USH and is frequently caused by mutations in USH2A, which accounts for 74-90% of USH2 cases. This is the first study reporting the results of scanning for USH2A mutations in Japanese patients with USH2. In 8 of 10 unrelated patients, we identified 14 different mutations. Of these mutations, 11 were novel. Although the mutation spectrum that we identified differed from that for Caucasians, the incidence of mutations in USH2A was 80% for all patients tested, which is consistent with previous findings. Further, c.8559-2A>G was identified in four patients and accounted for 26.7% of mutated alleles; it is thus a frequent mutation in Japanese patients. Hence, mutation screening for c.8559-2A>G in USH2A may prove very effective for the early diagnosis of USH2.
Collapse
Affiliation(s)
- H Nakanishi
- Department of Otolaryngology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | | | | | | | | | | | | |
Collapse
|
26
|
Takizawa M, Hotta Y, Susaki T, Ishida Y, Wadati H, Takata Y, Horiba K, Matsunami M, Shin S, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Fujimori A, Hwang HY. Spectroscopic evidence for competing reconstructions in polar multilayers LaAlO3/LaVO3/LaAlO3. Phys Rev Lett 2009; 102:236401. [PMID: 19658952 DOI: 10.1103/physrevlett.102.236401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2008] [Indexed: 05/28/2023]
Abstract
We have studied the valence redistribution of V in LaAlO(3)/LaVO(3)/LaAlO(3) trilayers, which are composed of only polar layers grown on SrTiO3 (001) substrates, by core-level photoemission spectroscopy. We have found that the V valence is intermediate between V3+ and V4+ for thin LaAlO3 cap layers, decreases with increasing cap-layer thickness, and finally recovers the bulk value of V3+ at approximately 10 unit-cell thickness. In order to interpret these results, we propose that the atomic reconstruction of the polar LaAlO3 surface competes with the purely electronic V valence change so that the polar catastrophe is avoided at the cost of minimum energy.
Collapse
Affiliation(s)
- M Takizawa
- Department of Physics, University of Tokyo, 3-7-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
We have investigated the transport properties of LaVO_{3}/SrTiO_{3} Mott-insulator-band-insulator heterointerfaces for various configurations. The (001)-oriented n-type VO_{2}/LaO/TiO_{2} polar discontinuity is conducting, exhibiting a LaVO3 thickness-dependent metal-insulator transition and low temperature anomalous Hall effect. The (001) p-type VO_{2}/SrO/TiO_{2} interface, formed by inserting a single layer of bulk metallic SrVO3 or SrO, drives the interface insulating. The (110) heterointerface is also insulating, indicating interface conduction arising from electronic reconstructions.
Collapse
Affiliation(s)
- Y Hotta
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8651, Japan
| | | | | |
Collapse
|
28
|
Fitting Kourkoutis L, Hotta Y, Susaki T, Hwang HY, Muller DA. Nanometer scale electronic reconstruction at the interface between LaVO3 and LaVO4. Phys Rev Lett 2006; 97:256803. [PMID: 17280379 DOI: 10.1103/physrevlett.97.256803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2006] [Indexed: 05/13/2023]
Abstract
Electrons at interfaces, driven to minimize their free energy, are distributed differently than in bulk. This can be dramatic at interfaces involving heterovalent compounds. Here we profile an abrupt interface between V 3d2 LaVO3 and V 3d0 LaVO4 using electron energy loss spectroscopy. Although no bulk phase of LaVOx with a V 3d1 configuration exists, we find a nanometer-wide region of V 3d1 at the LaVO3/LaVO4 interface, rather than a mixture of V 3d0 and V 3d2. The two-dimensional sheet of 3d1 electrons is a prototypical electronic reconstruction at an interface between competing ground states.
Collapse
Affiliation(s)
- L Fitting Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
| | | | | | | | | |
Collapse
|
29
|
Affiliation(s)
- Y Hotta
- BOTANY DEPARTMENT, UNIVERSITY OF ILLINOIS, URBANA
| | | |
Collapse
|
30
|
Endo T, Hotta Y, Haraguchi K, Sakata M. Distribution and toxicity of mercury in rats after oral administration of mercury-contaminated whale red meat marketed for human consumption. Chemosphere 2005; 61:1069-73. [PMID: 16263377 DOI: 10.1016/j.chemosphere.2005.03.050] [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] [Received: 11/09/2004] [Revised: 03/03/2005] [Accepted: 03/17/2005] [Indexed: 05/05/2023]
Abstract
Toothed-whales and dolphins have been hunted for human consumption in Japan, and their muscles (red meats) are highly contaminated with mercury (Hg). We investigated the distribution and toxicity of Hg in rats after oral administration of Hg-contaminated whale red meat marketed for human consumption in Japan. Rats were orally administered the red meat homogenate for seven consecutive days (0.5 g red meat/kg-bw/day). The red meat administered to rats contained 81microg/g of total mercury (T-Hg) and 13.4 microg/g of methyl mercury (M-Hg). This dose corresponds to the human consumption of 210 g red meat/60 kg-bw/week, exceeding by about 29 times the provisional tolerable weekly intake of M-Hg at 1.6 microg/kg-bw/week set by JECFA [JECFA, 2003. Joint FAO/WHO expert committee on food additives. 61st meeting, Rome]. Twenty-four hours after the last administration, the distribution of T-Hg in rat organs and biochemical parameters in serum were analyzed. The administration of red meat significantly elevated T-Hg concentrations in the liver, kidney, erythrocytes, cerebral cortex and medulla oblongata from the control levels but did not elevate the T-Hg concentration in serum, showing the typical distribution pattern of M-Hg, not of inorganic Hg. The administration slightly but significantly increased GTP activity and P concentration and decreased BUN concentration in serum, although no abnormalities were observed in rat body weight gain and movement during the 7 days. The occasional consumption of red meat from small cetaceans, therefore, could pose a health problem for not only pregnant women but also for the general population.
Collapse
Affiliation(s)
- T Endo
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Ishikari-Tobetsu, Hokkaido 061-0293, Japan.
| | | | | | | |
Collapse
|
31
|
Endo T, Haraguchi K, Cipriano F, Simmonds MP, Hotta Y, Sakata M. Contamination by mercury and cadmium in the cetacean products from Japanese market. Chemosphere 2004; 54:1653-1662. [PMID: 14675844 DOI: 10.1016/j.chemosphere.2003.09.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Cetaceans hunted coastally in Japan include several species of odontocete (dolphins, porpoises and beaked whales), and fresh and frozen red meat and blubber, as well as boiled internal organs, such as liver, lung, kidney and small intestine, are still sold for human consumption. Furthermore, red meat and blubber products originating from mysticete minke whales caught in the Antarctic and Northern Pacific are also sold for human consumption. We surveyed mercury and cadmium contamination levels in boiled liver, lung, kidney and red meat products being marketed in Japanese retail outlets. We also analyzed the DNA of these products to obtain information concerning gender and species. Total mercury (T-Hg) and methyl mercury (M-Hg) contamination levels in all the cetacean products were markedly higher in odontocete species than in mysticete species, and slightly higher in females than in males. T-Hg contamination in the organs was seen in the following order: boiled liver>boiled kidney=boiled lung>red meat. In particular, T-Hg concentrations in the boiled liver were high enough to cause acute intoxication even from a single ingestion: the mean +/-SD (range) of T-Hg was 388+/-543 (0.12-1980) microg/wetg. In contrast, although M-Hg contamination in the liver was not markedly higher than that in other organs, M-Hg contamination was in the following order: boiled liver>odontocete red meat>boiled kidney>boiled lung. The contamination levels of T-Hg and M-Hg in odontocete red meat, the most popular whale product, were 8.94+/-13.3 and 5.44+/-5.72 microg/wetg, respectively. These averages exceeded the provisional permitted levels of T-Hg (0.4 microg/wetg) and M-Hg (0.3 microg/wetg) in marine foods set by the Japanese Ministry of Health, Labor and Welfare by 22 and 18 times, respectively, suggesting the possibility of chronic intoxication by T-Hg and M-Hg with frequent consumption of odontocete red meat. Cadmium contamination levels in boiled liver, kidney and lung were 8.59+/-12.0, 10.4+/-8.6 and 1.66+/-1.27 (microg/wetg), respectively.
Collapse
Affiliation(s)
- T Endo
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757, Ishikari-Tobetsu, Hokkaido 061-0293, Japan.
| | | | | | | | | | | |
Collapse
|
32
|
Ito T, Tokunaga K, Maruyama H, Kawashima H, Kitahara H, Horikoshi T, Ogose A, Hotta Y, Kuwano R, Katagiri H, Endo N. Coxsackievirus and adenovirus receptor (CAR)-positive immature osteoblasts as targets of adenovirus-mediated gene transfer for fracture healing. Gene Ther 2003; 10:1623-8. [PMID: 12907955 DOI: 10.1038/sj.gt.3302060] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Adenovirus vectors are expected to be a powerful tool for gene therapy to treat severe fractures. Adenovirus invades cells through binding to the coxsackievirus and adenovirus receptor (CAR) on the cell membrane. CAR expression is low in normal adult animals, but it is induced on regenerating cells in some experimental models. We made a rib fracture model in mice and evaluated the histological changes and CAR mRNA expression by RT-PCR 1, 5, 10, 14, and 21 days after the fracture. CAR mRNA was expressed exclusively in the fractured ribs at each time point, but not in the normal ribs. We detected the CAR protein immunohistochemically in fibroblast-like cells in the fracture callus on days 10 and 14 after fracture. In situ hybridization showed that these fibroblast-like cells expressed mRNA of type I collagen and osteopontin, but not osteocalcin, defining the cells as immature osteoblasts. We then transferred small doses (10(4)-10(8) PFU) of lacZ-expressing adenovirus vector into immature osteoblasts on day 14. beta-galactosidase was detected only on the immature osteoblasts at every dose. Immature osteoblasts play an important role in the matrix replacement step in fracture healing. CAR-mediated gene transfer into immature osteoblasts can be reasonable for adenovirus-mediated treatment of fracture healing.
Collapse
Affiliation(s)
- T Ito
- Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Endo T, Hotta Y, Haraguchi K, Sakata M. Mercury contamination in the red meat of whales and dolphins marketed for human consumption in Japan. Environ Sci Technol 2003; 37:2681-2685. [PMID: 12854705 DOI: 10.1021/es034055n] [Citation(s) in RCA: 8] [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: 05/24/2023]
Abstract
Cetacean products sold for human consumption in Japan originate from a wide range of whale, dolphin, and porpoise species caught off several areas of the Japan coast, Antarctic and North Pacific Oceans. We surveyed the total mercury (T-Hg) levels in red meat, the most popular cetacean products in Japan. We also analyzed the DNA of these to obtain information regarding species. According to the genetic analysis, the red meats originating from nine species of odontocete and six species of mystecete were sold in Japanese markets. T-Hg concentrations in all odontocete red meats (0.52-81.0 microg/wet g, n = 137) exceeded the provisional permitted level of T-Hg in marine foods set by the Japanese government (0.4 microg/wet g). The highest and second highest levels of T-Hg in the red meats were found in the false killer whale (81.0 microg/wet g) and striped dolphin (63.4 microg/wet g), respectively. These concentrations of T-Hg exceeded the permitted level of T-Hg by about 200 and 160 times, respectively, suggesting the possibility of chronic intoxication by methyl mercury due to frequent consumption of odontocete red meats. The T-Hg concentration levels were higher in odontocete species such as Baird's beaked whales and pilot whales caught off southern areas than those caught off northern areas, probably reflecting a higher Hg concentration in the seawater and/or their diet (squid and fish) in the southern area. On the other hand, T-Hg concentrations in all mystecete red meat samples except for one (0.01-0.54 microg/ wet g, n = 62) were below the permitted level of T-Hg, probably reflecting their lower trophic levels.
Collapse
Affiliation(s)
- T Endo
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757, Ishikari-Tobetsu, Hokkaido 061-0293, Japan.
| | | | | | | |
Collapse
|
34
|
Hotta Y, Ishikawa N, Ohashi N, Matsui K. Effects of SM-20550, a selective Na+-H+ exchange inhibitor, on the ion transport of myocardial mitochondria. Mol Cell Biochem 2001; 219:83-90. [PMID: 11354258 DOI: 10.1023/a:1011019010140] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The effect of a novel Na+-H+ exchange inhibitor, SM-20550 [N-(aminoiminomethyl)-1,4-dimethyl-1H-indole-2-carboxamide methanesulfonate] (SM) on the ion transport of myocardial mitochondria was studied using ion fluorometry and superfusion techniques. Isolated mitochondria from the guinea-pig heart were pre-loaded with fluoroprobes of either BCECF AM for H+, SBFI AM for Na+ or fura-2 AM for Ca2+. Initially, the treated mitochondria were superfused with a normal medium (MOPS-buffer, pH 7.4, 24 degrees C), subsequently fluorometric experiments on the Na+, H+, Ca2+ mobilization across the mitochondrial membrane were performed. The intramitochondrial pH (pHm) was increased by the superfusion of Na+ at physiological cytosolic concentrations of 10 mM, indicating the existence of a Na+-H+ exchange in mitochondrial membranes. The Na+ induced elevation of pH was dose-dependently inhibited by SM 1 microM (delta pHm; 45% as drug-free 100%), and 10 microM (delta pHm; 70%), as observed in our experiments with the myocardial sarcolemmal membrane. The selective Na+-H+ exchange inhibitor SM reduced such pHm elevations more markedly than that of EIPA [5-(N-ethyl-N-isopropyl) amiloride]. The Na+-H+ exchange inhibitors, SM and EIPA suppressed the intramitochondrial Ca2+ elevation ([Ca2+]m) brought on by external Ca2+ concentration changes: The pretreatment with SM 1 microM, 10 microM and EIPA 10 microM reduced the [Ca2+]m influx by 28.3, 56.5 and 63%, respectively. Additionally, the [Ca2+]m elevation induced by acidification of the perfusate was reduced by the prior infusion of SM and EIPA. Pretreatment of mitochondria with SM or EIPA which had beneficial effects on the left ventricular developed pressure (LVDP) in the ischemia-reperfusion injury of Langendorff hearts, reduced the intramitochondrial Na+ and pHm levels, indicating interplay of the inhibitory mechanism of Ca2+-uptake into mitochondria coupled with Na+-H+ exchange. These findings suggested that protective effects of Na+-H+ exchange inhibitors on reperfused myocardium are due in part to the Ca2+-paradox at the mitochondria level.
Collapse
Affiliation(s)
- Y Hotta
- Department of Pharmacology, Aichi Medical University School of Medicine, Nagakute, Japan
| | | | | | | |
Collapse
|
35
|
Suami M, Kato M, Koide K, Usami Y, Hata N, Machida H, Hotta Y, Matsumoto K, Takigawa M. Keratolysis in a patient with pemphigus vulgaris. Br J Ophthalmol 2001; 85:1263-4. [PMID: 11596580 PMCID: PMC1723715 DOI: 10.1136/bjo.85.10.1260c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
36
|
Cao Y, Hotta Y, Shioi K, Nagata Y, Kawai N, Ishikawa N. Protective effects of FK409, a novel nitric oxide donor, against postischemic myocardial dysfunction in guinea-pig hearts. J Cardiovasc Pharmacol 2001; 38:593-605. [PMID: 11588530 DOI: 10.1097/00005344-200110000-00012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Effects of FK409 were investigated in perfused guinea-pig Langendorff hearts subjected to ischemia and reperfusion. Nitric oxide electrode, fluorometry, and 31P nuclear magnetic resonance imaging were used to monitor changes in cellular high-phosphorous energy and nitric oxide and Ca2+ content in the heart together with simultaneous recordings of left ventricular developed pressure. After cardioplegic arrest with St. Thomas' Hospital solution, normothermic (37 degrees C) global ischemia was induced for 40 min, and hearts were reperfused for 40 min. FK409 at 10(-8) M, which has a minimum inotropic effect on nonischemic hearts, was added to the cardioplegic solution. Treatment with FK409 reduced left ventricular developed pressure during and after ischemia and improved postischemic recovery of left ventricular developed pressure from 55.4% at 40 min of reperfusion in FK409-free hearts up to 80.4% in hearts treated with FK409 (p < 0.01). Flow rate at 1.5 min after treatment with the cardioplegic solution was 27.7 ml/min in hearts treated with FK409 compared with 21.2 ml/min in drug-free hearts (p < 0.01). Treatment with FK409 significantly effected preservation of tissue level of beta-adenosine triphosphate at the end of ischemia or reperfusion. During ischemia, arrested with the cardioplegic solution, intracellular Ca2+ accumulation and nitric oxide release were reduced. At the end of ischemia in FK409-treated hearts, nitric oxide release was 86% greater than in drug-free hearts without reference to the Ca2+ concentration. In cardiac surgery, normothermic arrested hearts are subject to damage by oxygen free radicals in reperfusion injury. Therefore, nitric oxide exogenously supplied by FK409 was responsible for the cardioprotective action, presumably by acting directly as an oxygen radical scavenger during reperfusion. A specific nitric oxide donor, like FK409, may have therapeutic use as a nitric oxide-mediated vasorelaxant and additional protective action for reperfusion-injury hearts.
Collapse
Affiliation(s)
- Y Cao
- Second Department of Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | | | | | | | | | | |
Collapse
|
37
|
Affiliation(s)
- Y Kamei
- Department of Plastic and Reconstructive Surgery, Nagoya University School of Medicine, Japan.
| | | | | | | |
Collapse
|
38
|
Takasu-Ishikawa E, Yoshihara M, Ueda A, Rheuben MB, Hotta Y, Kidokoro Y. Screening for synaptic defects revealed a locus involved in presynaptic and postsynaptic functions in Drosophila embryos. J Neurobiol 2001; 48:101-19. [PMID: 11438940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
To identify genes involved in synaptic functions, we screened lethal enhancer trap lines by monitoring synaptic activities at the neuromuscular junction in Drosophila embryos. It was found that MY7919, thus isolated, has moderate defects in both pre- and postsynaptic functions. The mean amplitudes of spontaneous as well as evoked synaptic currents were smaller than those in wild-type. The failure rate was higher than normal at any given concentration of external Ca(2+), indicating that presynaptic functions were impaired. In addition, the mean amplitude of miniature synaptic currents was smaller, and the unitary current amplitudes of junctional glutamate receptor channels were slightly but significantly smaller. Thus, postsynaptic functions were also altered. The gene was cloned and found to be identical to the previously reported apontic (=tracheae defective) locus, which is believed to be a transcription factor expressed in the central nervous system (CNS) as well as in the head, tracheae, and heart. Immunohistochemical analysis using an antiapontic antibody revealed that the protein is localized to nuclei. Null alleles of the apontic locus were obtained by imprecise excision of the enhancer trap vector. Synaptic activities in null mutants were not different from those of the original allele, even though null homozygotes had uncontracted ventral nerve cords and more severe behavioral phenotypes. The morphology of the neuromuscular junction of the null mutant was qualitatively similar to that of wild-type, with the presence of typical pre- and postsynaptic specializations, but with some suggestions of quantitative differences. This strategy for screening mutants with synaptic defects will reveal more genes directly or indirectly affecting synaptic transmission.
Collapse
Affiliation(s)
- E Takasu-Ishikawa
- Department of Physics, Graduate School of Science, University of Tokyo, Tokyo, 113-0033 Japan
| | | | | | | | | | | |
Collapse
|
39
|
Abstract
PURPOSE To report two Japanese patients who were clinically diagnosed with late-onset and sporadic lattice corneal dystrophy (LCD) in whom a Leu527Arg mutation in the TGFBI gene was found. METHODS Molecular genetic analysis was performed on DNA extracted from peripheral leukocytes from the patients. Exons 4, 11, and 12 of the TGFBI gene were amplified by polymerase chain reaction and directly sequenced. Histopathologic study was performed on the corneal tissue obtained during deep lamellar keratoplasty (DLK) from one of the patients. RESULTS Patient 1 was a 74-year-old man who noticed a visual disturbance at the age of 72 years. Deep stromal opacities with nodular deposits and thick lattice lines were observed only in the right cornea, and DLK was performed. Patient 2 was an 82-year-old man who had LCD (similar in appearance to that in patient 1) in both eyes without visual disturbance. Neither of the patients had a family history of corneal problems and had no episode of corneal erosion. A heterozygous single base-pair transition (CTG to CGG, leucine to arginin) was detected in codon 527 of the TGFBI gene in both patients. No mutation was found in codons 124, 501, 518, 546, or 555. Histopathologically, relatively large amyloid deposits in the deep corneal stroma and ribbons of amyloid deposits just beneath the Bowman's layer were observed in the corneal tissue of patient 1. CONCLUSIONS Clinical features and pathologic findings of the late-onset form of LCD with an L527R mutation in the TGFBI gene were made clear.
Collapse
Affiliation(s)
- K Hirano
- Department of Ophthalmology, Nagoya University School of Medicine, Nagoya, Japan.
| | | | | | | | | | | |
Collapse
|
40
|
Abstract
PURPOSE To report a patient with lattice corneal dystrophy type I (LCDI) who developed a triple anterior chamber after full-thickness lamellar keratoplasty (LKP). METHODS A 46-year-old woman underwent a full-thickness LKP in her right eye for visual disturbances caused by LCDI. Her visual acuity was 20/200 OD before surgery. A complete ophthalmic examination, including slit lamp biomicroscopy and optical coherence tomography (OCT), was performed before and after surgery. Molecular genetic analysis was performed on DNA extracted from the peripheral leukocytes. RESULTS The surgery was performed uneventfully; however, extra spaces posterior to the graft, along with the severe graft edema, were observed to form a triple anterior chamber a few days after surgery. The extra spaces resolved in 3 weeks with no surgical treatment, and her visual acuity improved to 20/20 OD without correction 3 months after surgery. The triple anterior chamber was clearly demonstrated by OCT, but not by slit lamp biomicroscopy. A heterozygous single base-pair transition (CGC to TGC, arginin to cysteine) was detected in codon 124 of the TGFBIgene in the patient. CONCLUSION The separation of the graft and the host's deep corneal tissue and a Descemet's membrane detachment in the host's cornea caused the triple anterior chamber. The Descemet's membrane detachment demonstrated the weak adhesion of the stroma and the Descemet's membrane, probably resulting from a dysfunction of the TGFBI protein caused by the mutation of the TGFBIgene. OCT is useful for the objective documentation of the posterior corneal region even with severe corneal edema.
Collapse
Affiliation(s)
- K Hirano
- Department of Ophthalmology, Nagoya University School of Medicine, Nagoya, Japan.
| | | | | | | |
Collapse
|
41
|
Hotta Y, Nakamura M, Okamoto Y, Nomura R, Terasaki H, Miyake Y. Different mutation of the XLRS1 gene causes juvenile retinoschisis with retinal white flecks. Br J Ophthalmol 2001; 85:238-9. [PMID: 11225572 PMCID: PMC1723857 DOI: 10.1136/bjo.85.2.238] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
42
|
Hotta Y, Nakagawa J, Ishikawa N, Wakida Y, Ando H, Takeya K, Ohashi N, Matsui K. Protective effect of SM-20550, a selective Na+ - H+ exchange inhibitor, on ischemia-reperfusion-injured hearts. J Cardiovasc Pharmacol 2001; 37:143-54. [PMID: 11209997 DOI: 10.1097/00005344-200102000-00002] [Citation(s) in RCA: 14] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The protective effects of Na+ - H+ exchange inhibitors SM-20550 (SM) and 5-(N-ethyl-N-isopropyl)-amiloride (EIPA) against ischemia-reperfusion injury were investigated in guinea pig Langendorff hearts. The changes in intracellular pH (pHi), high-energy phosphates, and biologic intracellular active ions ([Na+]i and [Ca2+]i) were regarded using the 31P-NMR and specific fluorescent signals from the heart tissues together with simultaneous recordings of the left ventricular developed pressure (LVDP). The recovery rate of LVDP from ischemia (40 min) by reperfusion was 36.8% in the control experiments, whereas in the presence of SM 10(-7) M, a gradual increase to 75.9% (55.5% with 10(-8) M), in contrast to EIPA (10(-7) M), 47.5% was observed. SM 10(-7) M restored the ATP level by 70% in 40-min reperfusion, which was already higher than the control in the latter half (20-40 min) of the ischemic period. The recovery rate of phosphocreatine by pretreatment of the heart with SM 10(-7) M was 75% in 40 min reperfusion. The pHi estimated from Pi/phosphocreatine chemical shift became highly acidic in ischemic heart so that SM 10(-7) M caused slight but significant pHi reduction from control pHi of 5.89 to 5.75. The level returned to pHi at around 7.38 during 30-40 min reperfusion, and the recovery was significantly greater than the control pHi of 7.24. The fura-2 Ca2+ or SBFI-Na+ signals during Langendorff ischemia heart increased, and rapidly returned to the control level after the reperfusion. SM suppressed the [Na+]i or [Ca2+]i elevation induced in the late stage during ischemia, resulting in LVDP restoration after reperfusion; Diastolic Ca2+ in the end period of ischemia, SM 10(-7) M 194% versus drug-free 220.7%. Na+: SM 10(-7) M 121.6% versus drug-free 128.0%. The present results suggest that the selective Na+ - H+ exchange inhibitor SM is promising as a potent and specific protective agent against ischemia-reperfusion injuries with Ca2+ overload induced via Na+ - H+, Na+ - Ca2+ exchange.
Collapse
Affiliation(s)
- Y Hotta
- Department of Pharmacology, Aichi Medical University School of Medicine, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Abstract
Many lines of evidence suggest that glial cells function as guide post cells for axonal pathfinding. However, due to the difficulty in completely eliminating glial cells during development, their functions in axonal pathfinding have not been critically evaluated. In Drosophila gcm mutant embryos, glial cells were genetically eliminated providing us with a unique opportunity to investigate glial functions in nervous system formation. We showed that even in the absence of glial cells the initial axonal extension of pioneer neurons was essentially normal. However, at later stages, axon bundle formation and pathfinding were disturbed in the absence of glial cells, and abnormal migration of glial cells led to misrouting of axons. This indicates that glial cells are required for correct pathfinding at later stages. We propose that glial cells function in a stage-specific manner; they are not required for the initial extension of pioneers but essential for the subsequent extension of pioneers and followers as well as axon bundle formation.
Collapse
Affiliation(s)
- K Takizawa
- Department of Physics, Graduate School of Science, University of Tokyo, Japan
| | | |
Collapse
|
44
|
Nakamura M, Hotta Y, Tanikawa A, Terasaki H, Miyake Y. A high association with cone dystrophy in Fundus albipunctatus caused by mutations of the RDH5 gene. Invest Ophthalmol Vis Sci 2000; 41:3925-32. [PMID: 11053295] [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: 02/18/2023] Open
Abstract
PURPOSE To analyze the RDH5 gene in patients with fundus albipunctatus with and without cone dystrophy and to determine whether the disease is stationary or progressive and whether the cone dystrophy is a part of fundus albipunctatus or a separate disease. METHODS Fourteen patients from 12 separate Japanese families with fundus albipunctatus were examined. Six of the patients from 6 families also had a cone dystrophy. Genomic DNA was extracted from leukocytes of the peripheral blood, and exons 2, 3, 4, and 5 of the RDH5 gene were amplified by polymerase chain reaction and were directly sequenced. A complete ophthalmic examination was performed including best-corrected visual acuity, slit-lamp examination, indirect ophthalmoscopy, fundus photography, and electroretinography. RESULTS In all the patients, either a homozygous mutation or compound heterozygous mutations in the RDH5 gene were identified. The identified mutations were nucleotide position (nt) 103 G to A (Gly35Ser), nt 319 G to C (Gly107Arg), nt 394 G to A (Val132Met), nt 719 G insertion (frame shift), nt 839 G to A (Arg280His), nt 841 T to C (Tyr281His), and nt 928 C to GAAG (Leu310 to GluVal). All these mutations except the Arg280His were new. The nt 928 C to GAAG mutation was detected in patients with and without cone dystrophy. Cone dystrophy was most frequently seen in patients over 40 years old. CONCLUSIONS Fundus albipunctatus either with or without cone dystrophy is caused by mutations of the RDH5 gene. Cone dystrophy is frequently observed in elderly patients with fundus albipunctatus. The conclusion was reached that the mutations of the RDH5 gene caused a progressive cone dystrophy as well as night blindness.
Collapse
Affiliation(s)
- M Nakamura
- Department of Ophthalmology, Nagoya University School of Medicine, Nagoya, Japan.
| | | | | | | | | |
Collapse
|
45
|
Fujiki K, Hotta Y, Nakayasu K, Yamaguchi T, Kato T, Uesugi Y, Ha NT, Endo S, Ishida N, Lu WN, Kanai A. Six different mutations of TGFBI (betaig-h3, keratoepithelin) gene found in Japanese corneal dystrophies. Cornea 2000; 19:842-5. [PMID: 11095060 DOI: 10.1097/00003226-200011000-00015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To investigate mutations of the human transforming growth factor beta-induced gene (TGFBI), transforming growth factor-beta-induced gene product (betaig-h3, keratoepithelin), in Japanese patients with Avellino corneal dystrophy (ACD), lattice corneal dystrophy (LCD), granular corneal dystrophy (GCD), and Reis-Bücklers corneal dystrophy (RBCD). METHODS Genomic DNA was extracted from the peripheral blood of 75 patients and 7 unaffected relatives from 60 families with ACD, 34 patients and 8 unaffected relatives from 21 families with LCD, 4 patients and 4 unaffected relatives from 4 families with GCD, and 4 patients and an unaffected relative from 3 families with RBCD. Fifty normal volunteers served as controls. Exons 4, 11, and 12 of the TGFBI gene were amplified by polymerase chain reaction and were directly sequenced. RESULTS Six different heterozygous missense mutations were detected in codons R124, L518, L527, and R555 of the TGFBI gene in the 117 patients from 88 families. A R124H mutation was detected in the patients with ACD. A R124C mutation was detected in the patients with LCD type 1 (LCD1), L518P was in atypical LCDI, and L527R in LCD with opacities deep in stroma. A R555W mutation was detected in the patients with GCD. A R555Q mutation was detected in the patients with RBCD. CONCLUSIONS We conclude that codons R124 and R555 of the TGFBI gene are also hot spots in Japanese patients with ACD, LCD, GCD, and RBCD. Many Japanese patients with CD had ACD with R124H mutation. GCD with R555W mutation was rare.
Collapse
Affiliation(s)
- K Fujiki
- Department of Ophthalmology, Juntendo University School of Medicine, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Yoshii M, Murakami A, Akeo K, Fujiki K, Saga M, Mizukawa A, Itoh J, Okisaka S, Yanashima K, Hotta Y, Kanai A, Oguchi Y. Visual function in retinitis pigmentosa related to a codon 15 rhodopsin gene mutation. Ophthalmic Res 2000; 30:1-10. [PMID: 9483582 DOI: 10.1159/000055448] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To determine the phenotype of a Japanese family in which retinitis pigmentosa cosegregates with a rhodopsin gene mutation, i.e. an asparagine-to-serine change at codon 15 (Asn-15-Ser), 5 affected and 5 unaffected members of one pedigree underwent several ophthalmic examinations as well as Ganzfeld electroretinography (ERG) and multifocal ERG. Genomic DNA samples were analyzed by PCR amplification, sequencing and restriction enzyme digestion. A codon 15 rhodopsin gene mutation (Asn-15-Ser) was found in all affected members. The region of pigmentary degeneration was localized in the lower hemiretina, and visual field defects corresponded to the retinal pigmentary changes. Scotopic ERG amplitudes, rather than photopic ERG amplitudes, were reduced. Multifocal ERG revealed a low magnitude of response density, even for the upper hemiretina, which showed no bony corpuscle pigmentation. Visual function in sectorial retinitis pigmentosa associated with rhodopsin gene codon 15 mutation is on the basis of the rod-cone dystrophy, regardless of differences in phenotypic expression.
Collapse
Affiliation(s)
- M Yoshii
- Department of Ophthalmology, National Defense Medical College, Tokorozawa-shi, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Yamazaki A, Hotta Y, Kurosu H, Ando I. Spatial distribution of paramagnetic Mn2+ ions in a composite PMAA gel with the application of an electric field as studied by 1H NMR imaging method. J Mol Struct 2000. [DOI: 10.1016/s0022-2860(00)00558-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
48
|
Kubota R, Mashima Y, Ohtake Y, Tanino T, Kimura T, Hotta Y, Kanai A, Tokuoka S, Azuma I, Tanihara H, Inatani M, Inoue Y, Kudoh J, Oguchi Y, Shimizu N. Novel mutations in the myocilin gene in Japanese glaucoma patients. Hum Mutat 2000; 16:270. [PMID: 10980537 DOI: 10.1002/1098-1004(200009)16:3<270::aid-humu13>3.0.co;2-m] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Myocilin is a gene responsible for juvenile onset primary open angle glaucoma (POAG) mapped as the GLC1A locus and, many mutations have been reported worldwide. Some mutations were found not only in patients with juvenile onset POAG, but also in patients with late onset POAG and in patients with normal tension glaucoma. To investigate the mutation prevalence in Japan, we performed a mutation analysis in 140 unrelated Japanese patients. We have identified the 10 sequence variants, of which four were highly probable for disease-causing mutations (Arg46ter, Arg158Gln, Ile360Asn, and Ala363Thr), and six polymorphisms (Gln19His, Arg76Lys, Asp208Glu, Val439Val, Arg470His, and Ala488Ala). Thus, myocilin mutations were found at the rate of 4/140 (2.9%) probands, similar to previous reports with other ethnic populations.
Collapse
Affiliation(s)
- R Kubota
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Abstract
Netrin is a secreted protein that can act as a chemotropic axon guidance cue. Two classes of Netrin receptor, DCC and UNC-5 (refs 6-9), are required for axon guidance and are thought to mediate Netrin signals in growth cones through their cytoplasmic domains. However, in the guidance of Drosophila photoreceptor axons, the DCC orthologue Frazzled is required not in the photoreceptor neurons but instead in their targets, indicating that Frazzled also has a non-cell-autonomous function. Here we show that Frazzled can capture Netrin and 'present' it for recognition by other receptors. Moreover, Frazzled itself is actively localized within the axon through its cytoplasmic domain, and thereby rearranges Netrin protein into a spatial pattern completely different from the pattern of Netrin gene expression. Frazzled-dependent guidance of one pioneer neuron in the central nervous system can be accounted for solely on the basis of this ability of Frazzled to control Netrin distribution, and not by Frazzled signalling. We propose a model of patterning mechanism in which a receptor rearranges secreted ligand molecules, thereby creating positional information for other receptors.
Collapse
Affiliation(s)
- M Hiramoto
- Department of Developmental Genetics, National Institute of Genetics, Graduate University for Advanced Studies, Japan
| | | | | | | |
Collapse
|
50
|
Abstract
During development of the Drosophila central nervous system, neuroblast 6–4 in the thoracic segment (NB6-4T) divides asymmetrically into a medially located glial precursor cell and a laterally located neuronal precursor cell. In this study, to understand the molecular basis for this glia-neuron cell-fate decision, we examined the effects of some known mutations on the NB6-4T lineage. First, we found that prospero (pros) mutations led to a loss of expression of Glial cells missing, which is essential to trigger glial differentiation, in the NB6-4T lineage. In wild-type embryos, Pros protein was localized at the medial cell cortex of dividing NB6-4T and segregated to the nucleus of the glial precursor cell. miranda and inscuteable mutations altered the behavior of Pros, resulting in failure to correctly switch the glial and neuronal fates. Our results suggested that NB6-4T used the same molecular machinery in the asymmetric cell division as other neuroblasts in cell divisions producing ganglion mother cells. Furthermore, we showed that outside the NB6-4T lineage most glial cells appeared independently of Pros.
Collapse
Affiliation(s)
- Y Akiyama-Oda
- Department of Cell Biology, Faculty of Medicine, Kyoto University, Yoshidakonoe-cho, Sakyo-ku, Kyoto 606-8501, Japan.
| | | | | | | |
Collapse
|