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Zeze T, Shinjo T, Sato K, Nishimura Y, Imagawa M, Chen S, Ahmed AK, Iwashita M, Yamashita A, Fukuda T, Sanui T, Park K, King GL, Nishimura F. Endothelial Insulin Resistance Exacerbates Experimental Periodontitis. J Dent Res 2023; 102:1152-1161. [PMID: 37448347 DOI: 10.1177/00220345231181539] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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] [Indexed: 07/15/2023] Open
Abstract
Epidemiological studies suggest that the severity of periodontitis is higher in people with diabetes than in healthy individuals. Insulin resistance might play a crucial role in the pathogenesis of multiple diabetic complications and is reportedly induced in the gingiva of rodents with type 2 diabetes; however, the molecular mechanisms underlying the pathogenesis of diabetes-related periodontitis remain unclear. Therefore, we aimed to investigate whether endothelial insulin resistance in the gingiva may contribute to the pathogenesis of periodontitis as well as elucidate its underlying molecular mechanisms. We demonstrated that insulin treatment downregulated lipopolysaccharide (LPS)-induced or tumor necrosis factor α (TNFα)-induced VCAM1 expression in endothelial cells (ECs) via the PI3K/Akt activating pathway, resulting in reduced cellular adhesion between ECs and leukocytes. Hyperglycemia-induced selective insulin resistance in ECs diminished the effect of insulin on LPS- or TNFα-stimulated VCAM1 expression. Vascular endothelial cell-specific insulin receptor knockout (VEIRKO) mice exhibited selective inhibition of the PI3K/Akt pathway in the gingiva and advanced experimental periodontitis-induced alveolar bone loss via upregulation of Vcam1, Tnfα, Mcp-1, Rankl, and neutrophil migration into the gingiva compared with that in the wild-type (WT) mice despite being free from diabetes. We also observed that insulin-mediated activation of FoxO1, a downstream target of Akt, was suppressed in the gingiva of VEIRKO and high-fat diet (HFD)-fed mice, hyperglycemia-treated ECs, and primary ECs from VEIRKO. Further analysis using ECs transfected with intact and mutated FoxO1, with mutations at 3 insulin-mediated phosphorylation sites (T24A, S256D, S316A), suggested that insulin-mediated regulation of VCAM1 expression and cellular adhesion of ECs with leukocytes was attenuated by mutated FoxO1 overexpression. These results suggest that insulin resistance in ECs may contribute to the progression of periodontitis via dysregulated VCAM1 expression and cellular adhesion with leukocytes, resulting from reduced activation of the PI3K/Akt/FoxO1 axis.
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Affiliation(s)
- T Zeze
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Shinjo
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - K Sato
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Y Nishimura
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - M Imagawa
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - S Chen
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - A-K Ahmed
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - M Iwashita
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - A Yamashita
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Fukuda
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Sanui
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - K Park
- Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA
| | - G L King
- Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA
| | - F Nishimura
- Section of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
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Iwata M, Uramatsu T, Torigoe K, Yamashita A, Ota Y, Muta K, Kitamura M, Shirakawa T, Kang D, Honda K, Mochizuki Y, Sakai H, Nishino T. Proteinuria and Renal Dysfunction Due to Extremely Low Birth Weight in a Patient with Silver-Russell Syndrome. Kurume Med J 2023:MS682017. [PMID: 37245996 DOI: 10.2739/kurumemedj.ms682017] [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] [Indexed: 05/30/2023]
Abstract
A 36-year-old woman diagnosed with Silver-Russell syndrome during childhood presented to our department after a primary care physician suspected renal dysfunction. At birth, she had an extremely low weight (1210 g), and in childhood, she was diagnosed with Silver-Russell syndrome. At the age of 14 she was found to have proteinuria; however, the condition was never further examined. One month prior to her presentation to our department, the following were noted: 3+ urinary protein, 3.9 urinary protein/creatinine ratio, and 48 mL/min/1.73 m2 estimated glomerular filtration rate. Abdominal computed tomography revealed small kidneys difficult to visualize using ultrasound. Therefore, an open renal biopsy was performed. The renal biopsy revealed no significant findings in the glomerulus except glomerular hypertrophy, and the glomerular density in the cortical area was low (0.6/mm2). The patient was diagnosed with oligomeganephronia. Proteinuria and renal dysfunction were likely due to glomerular hyperfiltration resulting from a low nephron count caused by low birth weight. Silver-Russell syndrome is characterized by intrauterine growth retardation and additional developmental disorders after birth. Here, we detected oligomeganephronia following kidney biopsy in a patient with Silver-Russell syndrome. We suspect that a reduced number of nephrons due to low birth weight caused proteinuria and renal dysfunction.
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Affiliation(s)
- Mayu Iwata
- Department of Nephrology, Nagasaki Harbor Medical Center
- Department of Nephrology, Nagasaki University Hospital
| | - Tadashi Uramatsu
- Department of Nephrology, Nagasaki University Hospital
- Department of Nephrology, Isahaya general hospital
| | - Kenta Torigoe
- Department of Nephrology, Nagasaki University Hospital
| | - Ayuko Yamashita
- Division of Blood Purification, Nagasaki University Hospital
| | - Yuki Ota
- Department of Nephrology, Nagasaki University Hospital
| | - Kumiko Muta
- Department of Nephrology, Nagasaki University Hospital
| | - Mineaki Kitamura
- Department of Nephrology, Nagasaki University Hospital
- Department of Nephrology, Nagasaki Renal Center
| | | | - Dedong Kang
- Department of Anatomy, Showa University School of Medicine
| | - Kazuho Honda
- Department of Anatomy, Showa University School of Medicine
| | - Yasushi Mochizuki
- Division of Blood Purification, Nagasaki University Hospital
- Department of Urology, Nagasaki University Graduate School of Biomedical Sciences
| | - Hideki Sakai
- Department of Urology, Nagasaki University Graduate School of Biomedical Sciences
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Uchida T, Ichinose K, Yamashita A, Muta K, Kitamura M, Sato S, Iwamoto N, Nishino T, Kawakami A. Evaluation of a renal risk score for Japanese patients with ANCA-associated glomerulonephritis in a multi-center cohort study. Front Immunol 2023; 14:1141407. [PMID: 36926340 PMCID: PMC10011144 DOI: 10.3389/fimmu.2023.1141407] [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: 01/10/2023] [Accepted: 02/17/2023] [Indexed: 03/08/2023] Open
Abstract
Background In patients with anti-neutrophil cytoplasmic antibody (ANCA)-associated glomerulonephritis, prediction of renal survival should guide the choice of therapy, but a prediction of the histological classification has inconsistencies. Objectives To evaluate the usefulness of renal risk score (RRS) for Japanese patients with ANCA-associated glomerulonephritis (AAGN) and compare the prediction for end-stage renal disease (ESRD) between RRS and the histological classification. Methods We retrospectively analyzed 96 patients with AAGN who underwent a renal biopsy. Renal survival was categorized by RRS, and the histological classification was assessed separately. We compared the predictive values for RRS and the histological classification. Results The median observational period was 37.5 (interquartile range [IQR] 21.5-77.0) months. The median RRS point at the time of renal biopsy was 2 (IQR 0-7.8), and the patients were categorized into low- (n = 29), medium- (n = 43), and high-risk groups (n = 24) using RRS. As expected, the renal prognosis was the worst in the "high-risk" group and the best in the "low-risk" group. In the histological classification, the survival deteriorated progressively from "focal" (best) to "mixed," "crescentic," and "sclerotic" (worst) classes, different from the order in the original proposal for this system. Multivariable Cox regression analysis revealed that RRS was independently associated with ESRD. The difference in prediction for renal survival between RRS and the histological classification was not significant using area under receiver-operating-characteristic curves. Conclusion We evaluated the usefulness of RRS in Japanese patients with AAGN and found it a stable predictor of renal survival in such patients.
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Affiliation(s)
- Tomohisa Uchida
- Department of Rheumatology, National Hospital Organization Ureshino Medical Center, Ureshino, Japan.,Department of Immunology and Rheumatology, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kunihiro Ichinose
- Department of Immunology and Rheumatology, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of Rheumatology, Shimane University Faculty of Medicine, Izumo, Japan
| | - Ayuko Yamashita
- Department of Nephrology, Nagasaki University Hospital, Nagasaki, Japan
| | - Kumiko Muta
- Department of Nephrology, Nagasaki University Hospital, Nagasaki, Japan
| | - Mineaki Kitamura
- Department of Nephrology, Nagasaki University Hospital, Nagasaki, Japan
| | - Shuntaro Sato
- Clinical Research Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Naoki Iwamoto
- Department of Immunology and Rheumatology, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Tomoya Nishino
- Department of Nephrology, Nagasaki University Hospital, Nagasaki, Japan
| | - Atsushi Kawakami
- Department of Immunology and Rheumatology, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Torigoe K, Ikemi Y, Yoshida Y, Sakamoto R, Yamashita A, Abe S, Muta K, Arai H, Mukae H, Nishino T. Acute Kidney Injury Caused by Renin-Angiotensin System Inhibitors During Minimal Change Disease Treatment. Cureus 2022; 14:e30346. [DOI: 10.7759/cureus.30346] [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] [Accepted: 10/16/2022] [Indexed: 11/06/2022] Open
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Yamashita A, Kitamura M, Tateishi Y, Torigoe K, Muta K, Mochizuki Y, Izumo T, Matsuo T, Tsujino A, Sakai H, Mukae H, Nishino T. Correlation between a Bedridden Status and the Long-term Outcome in Hemodialysis Patients after Intracerebral Hemorrhaging. Intern Med 2022; 61:1133-1138. [PMID: 34565774 PMCID: PMC9107990 DOI: 10.2169/internalmedicine.8006-21] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Objective The quality of life and activities of daily living (ADL) are generally poor among dialysis patients after intracerebral hemorrhaging, and their precise clinical course remains unclear. In addition, the association between the severity of cerebral hemorrhaging and the long-term prognosis in these patients has not been fully elucidated. This study aimed to evaluate the subsequent prognosis of hemodialysis patients who survived the acute phase of intracerebral hemorrhaging. Methods We included hemodialysis patients who were admitted to Nagasaki University Hospital between 2007 and 2015 for intracerebral hemorrhaging treatment. After excluding cases of in-hospital death, survivors were classified using the 5-point modified Rankin Scale (mRS), which specifically measures the ADL in patients with cerebrovascular diseases. The patients were followed up at the medical facilities to which they were transferred in the same medical zone until 2017. Results Out of 91 patients with cerebral hemorrhaging (65±11 years old, 66% men, hemodialysis duration 108±91 months), 62 survived until discharge. Twenty-one patients died during observation, largely due to infectious diseases, such as sepsis and pneumonia (n=16, 76%). Compared to patients with mRS 0-4 (n=31), those with mRS 5 (n=31) showed a significantly poorer prognosis. The hazard ratio adjusted for age and antiplatelets was 13.7 (95% confidence interval: 3.88-63.7, p<0.001). Conclusion Hemodialysis patients with intracerebral hemorrhaging who were bedridden showed poor outcomes. The major causes of death were infections. Therefore, these patients should be carefully monitored for infections in order to improve their prognosis.
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Affiliation(s)
- Ayuko Yamashita
- Division of Blood Purification, Nagasaki University Hospital, Japan
- Department of Nephrology, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Mineaki Kitamura
- Department of Nephrology, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Yohei Tateishi
- Department of Neurology and Strokology, Nagasaki University Hospital, Japan
| | - Kenta Torigoe
- Department of Nephrology, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Kumiko Muta
- Department of Nephrology, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Yasushi Mochizuki
- Division of Blood Purification, Nagasaki University Hospital, Japan
- Deparment of Urology, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Tsuyoshi Izumo
- Department of Neurosurgery, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Takayuki Matsuo
- Department of Neurosurgery, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Akira Tsujino
- Department of Neurology and Strokology, Nagasaki University Hospital, Japan
| | - Hideki Sakai
- Deparment of Urology, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
| | - Tomoya Nishino
- Department of Nephrology, Nagasaki University School of Medicine Graduate School of Biomedical Sciences, Japan
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Kuwano K, Ota Y, Tsuji K, Torigoe K, Yamashita A, Muta K, Kitamura M, Yamashita H, Uramatsu T, Tashiro M, Hayashi H, Izumikawa K, Mukae H, Nishino T. An Autopsy Case of Disseminated Varicella Zoster Virus Infection during the Treatment of Nephrotic Syndrome. Intern Med 2022; 61:571-576. [PMID: 34393162 PMCID: PMC8907779 DOI: 10.2169/internalmedicine.7332-21] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A 68-year-old woman developed systemic blisters while receiving treatment for nephrotic syndrome. As she also developed marked liver dysfunction and disseminated intravascular coagulation, she was admitted to our hospital. She was diagnosed with varicella zoster virus (VZV) infection. Treatment was administered in the intensive-care unit, but the patient died on day 24 post-admission after severe VZV infection. A post-mortem examination showed micro-abscesses and necrosis caused by varicella zoster infection in multiple organs, including the liver, kidneys, and gastrointestinal tract. Because VZV infection can become severe in immunocompromised patients, careful consideration is needed for the prevention and treatment of the viral infection.
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Affiliation(s)
| | - Yuki Ota
- Department of Nephrology, Nagasaki University Hospital, Japan
| | - Kiyokazu Tsuji
- Department of Nephrology, Nagasaki University Hospital, Japan
| | - Kenta Torigoe
- Department of Nephrology, Nagasaki University Hospital, Japan
| | - Ayuko Yamashita
- Department of Nephrology, Nagasaki University Hospital, Japan
| | - Kumiko Muta
- Department of Nephrology, Nagasaki University Hospital, Japan
| | | | | | | | - Masato Tashiro
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Hiroko Hayashi
- Department of Pathology, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Tomoya Nishino
- Department of Nephrology, Nagasaki University Hospital, Japan
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Torigoe K, Muta K, Tsuji K, Yamashita A, Abe S, Ota Y, Mukae H, Nishino T. Safety of Renal Biopsy by Physicians with Short Nephrology Experience. Healthcare (Basel) 2021; 9:healthcare9040474. [PMID: 33923650 PMCID: PMC8072574 DOI: 10.3390/healthcare9040474] [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] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 12/18/2022] Open
Abstract
Percutaneous renal biopsy is an essential tool for diagnosing various renal diseases; however, little is known about whether renal biopsy performed by physicians with short nephrology experience is safe in Japan. This study included 238 patients who underwent percutaneous renal biopsy between April 2017 and September 2020. We retrospectively analyzed the frequency of post-renal biopsy complications (hemoglobin decrease of ≥10%, hypotension, blood transfusion, renal artery embolization, nephrectomy and death) and compared their incidence among physicians with varied experience in nephrology. After renal biopsy, a hemoglobin decrease of ≥10%, hypotension and transfusion occurred in 13.1%, 3.8% and 0.8% of patients, respectively. There were no cases of post-biopsy renal artery embolism, nephrectomy, or death. The composite complication rate was 16.0%. The incidence of post-biopsy complications was similar between physicians with ≥3 years and <3 years of clinical nephrology experience (12.5% vs. 16.8%, p = 0.64). Furthermore, the post-biopsy composite complication rates were similar between physicians with ≥6 months and <6 months of clinical nephrology experience (16.3% vs. 15.6%, p > 0.99). Under attending nephrologist supervision, a physician with short clinical nephrology experience can safely perform renal biopsy.
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Affiliation(s)
- Kenta Torigoe
- Department of Nephrology, Nagasaki University Hospital, Nagasaki 852-8501, Japan; (K.T.); (K.T.); (A.Y.); (S.A.); (Y.O.); (T.N.)
| | - Kumiko Muta
- Department of Nephrology, Nagasaki University Hospital, Nagasaki 852-8501, Japan; (K.T.); (K.T.); (A.Y.); (S.A.); (Y.O.); (T.N.)
- Correspondence: ; Tel.: +81-95-819-7282
| | - Kiyokazu Tsuji
- Department of Nephrology, Nagasaki University Hospital, Nagasaki 852-8501, Japan; (K.T.); (K.T.); (A.Y.); (S.A.); (Y.O.); (T.N.)
| | - Ayuko Yamashita
- Department of Nephrology, Nagasaki University Hospital, Nagasaki 852-8501, Japan; (K.T.); (K.T.); (A.Y.); (S.A.); (Y.O.); (T.N.)
| | - Shinichi Abe
- Department of Nephrology, Nagasaki University Hospital, Nagasaki 852-8501, Japan; (K.T.); (K.T.); (A.Y.); (S.A.); (Y.O.); (T.N.)
| | - Yuki Ota
- Department of Nephrology, Nagasaki University Hospital, Nagasaki 852-8501, Japan; (K.T.); (K.T.); (A.Y.); (S.A.); (Y.O.); (T.N.)
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan;
| | - Tomoya Nishino
- Department of Nephrology, Nagasaki University Hospital, Nagasaki 852-8501, Japan; (K.T.); (K.T.); (A.Y.); (S.A.); (Y.O.); (T.N.)
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Goto K, Hida T, Funami N, Iwasawa R, Mita S, Botilde Y, Yamashita A, Inoh Y, Haddish-Berhane N, Xie J, Roshak A, Knoblauch R, Ohe Y. P15.03 A Phase 1/1b Study of Lazertinib as Monotherapy and in Combination with Amivantamab in Advanced EGFR-Mutated NSCLC. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Torigoe K, Muta K, Tsuji K, Yamashita A, Ota Y, Kitamura M, Mukae H, Nishino T. Urinary Liver-Type Fatty Acid-Binding Protein Predicts Residual Renal Function Decline in Patients on Peritoneal Dialysis. Med Sci Monit 2020; 26:e928236. [PMID: 33347426 PMCID: PMC7760718 DOI: 10.12659/msm.928236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Background Liver-type fatty acid-binding protein (L-FABP) is a predictive marker for the early detection of acute kidney injury; however, less is known about how useful it is for predicting residual renal function (RRF) decline in patients on peritoneal dialysis (PD). Material/Methods The study subjects were 35 patients on PD who underwent multiple peritoneal equilibration tests (PETs) between October 2011 and October 2019. Urinary L-FABP levels were analyzed with enzyme-linked immunosorbent assay. The relationship between baseline clinical data, including urinary L-FABP levels and the subsequent annual rate of renal Kt/V decline, was investigated. Results The median follow-up duration was 11 months and the rate of renal Kt/V decline was 0.29/y. Compared with outcomes in the group with renal Kt/V preservation, renal Kt/V decline was associated with both high daily levels of urinary protein excretion (0.60 g/d [range, 0.50–0.87] vs. 0.36 g/d [range, 0.19–0.48]; P=0.01) and high daily levels of urinary L-FABP excretion (111.2 mg/d [range, 76.1–188.6] vs. 61.5 mg/d [range, 35.7–96.0]; P=0.002). Multiple logistic regression analysis showed that only high daily levels of urinary L-FABP excretion were independently associated with renal Kt/V decline (odds ratio 1.03, 95% confidence interval 1.00–1.05; P=0.001). Furthermore, higher daily levels of urinary L-FABP excretion were significantly correlated with the higher annual rate of renal Kt/V decline (r=0.71, P<0.001). Conclusions We demonstrated that daily levels of urinary L-FABP are associated with RRF decline in patients on PD. The results of the present study indicate that assessment of urinary L-FABP levels may help predict RRF decline in patients on PD.
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Affiliation(s)
- Kenta Torigoe
- Department of Nephrology, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Kumiko Muta
- Department of Nephrology, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Kiyokazu Tsuji
- Department of Nephrology, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Ayuko Yamashita
- Department of Nephrology, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Yuki Ota
- Department of Nephrology, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Mineaki Kitamura
- Department of Nephrology, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - Tomoya Nishino
- Department of Nephrology, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
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Azuma M, Maekawa K, Yamashita A, Yokogami K, Enzaki M, Khant ZA, Takeshima H, Asada Y, Wang Y, Hirai T. Characterization of Carotid Plaque Components by Quantitative Susceptibility Mapping. AJNR Am J Neuroradiol 2019; 41:310-317. [PMID: 31879331 DOI: 10.3174/ajnr.a6374] [Citation(s) in RCA: 7] [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] [Received: 08/15/2019] [Accepted: 11/14/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND PURPOSE Intraplaque hemorrhage in the carotid artery is related to an increased risk of cerebrovascular ischemic events. We aimed to investigate whether quantitative susceptibility mapping can characterize carotid artery plaque components and quantify the severity of intraplaque hemorrhage. MATERIALS AND METHODS For this ex vivo quantitative susceptibility mapping study, 9 carotid endarterectomy specimens were imaged on a 3T MR imaging scanner using a 3D multi-echo gradient-echo sequence and a microscopy coil. The samples were examined histologically using immunostains, including glycophorin A and Prussian blue. The areas of erythrocytes, iron deposits, calcification, and fibrous matrices observed on stained sections were compared with quantitative susceptibility mapping findings and their mean susceptibility values. RESULTS Intraplaque hemorrhage and iron deposits were observed only in areas hyperintense on quantitative susceptibility mapping; calcifications and fibrous matrices were prevalent in hypointense areas. The mean susceptibility values for necrotic cores with intraplaque hemorrhage but no iron deposits, cores with iron deposits but no intraplaque hemorrhage, cores without either intraplaque hemorrhage or iron deposits, and cores with calcification were 188 ± 51, 129 ± 49, -11 ± 17, and -158 ± 78 parts per billion, respectively. There was a significant difference in the mean susceptibility values among the 4 histologic components (P < .01). The mean susceptibility values of the whole plaque positively correlated with the percentage area positive for glycophorin A (r = 0.65, P < .001) and Prussian blue (r = 0.47, P < .001). CONCLUSIONS Our findings suggest that quantitative susceptibility mapping can characterize the composition of carotid plaques and quantify the degree of intraplaque hemorrhage and iron deposits.
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Affiliation(s)
- M Azuma
- From the Departments of Radiology (M.A., Z.A.K., T.H.)
| | | | | | - K Yokogami
- Neurosurgery (K.Y., H.T., Y.A.), Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - M Enzaki
- Radiology Section (M.E.), University of Miyazaki Hospital, Miyazaki, Japan
| | - Z A Khant
- From the Departments of Radiology (M.A., Z.A.K., T.H.)
| | - H Takeshima
- Neurosurgery (K.Y., H.T., Y.A.), Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Y Asada
- Neurosurgery (K.Y., H.T., Y.A.), Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Y Wang
- Department of Radiology (Y.W.), Weill Medical College of Cornell University, New York, New York
| | - T Hirai
- From the Departments of Radiology (M.A., Z.A.K., T.H.)
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Fukuda H, Yamashita A, Ishikawa H, Nagata N, Niihara M. MON-PO556: The Invention of Tongue Cover to Reduce Discomfort During Intake of Oral Nutritional Supplements. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32389-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Thompson MC, Wolff AM, Nango E, Kubo M, Young ID, Nakane T, Sugahara M, Tanaka R, Ito K, Brewster AS, Sierra RG, Yumoto F, Nomura T, Owada S, Hino T, Tosha T, Tanaka T, Im D, Aquila A, Carbajo S, Koralek J, Yamashita A, Luo F, Boutet S, Sauter NK, Tono K, Iwata S, Fraser JS. Turning up the heat on dynamic proteins: observing molecular motion in real time with temperature-jump X-ray crystallography. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s0108767319098349] [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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13
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Yoshida T, Kurosaki Y, Mine A, Kimura-Ono A, Mino T, Osaka S, Nakagawa S, Maekawa K, Kuboki T, Yatani H, Yamashita A. Fifteen-year survival of resin-bonded vs full-coverage fixed dental prostheses. J Prosthodont Res 2019; 63:374-382. [DOI: 10.1016/j.jpor.2019.02.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 02/01/2019] [Accepted: 02/13/2019] [Indexed: 11/28/2022]
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14
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Kimura T, Ozaki T, Fujita K, Yamashita A, Morioka M, Ozono K, Tsumaki N. Proposal of patient-specific growth plate cartilage xenograft model for FGFR3 chondrodysplasia. Osteoarthritis Cartilage 2018; 26:1551-1561. [PMID: 30086379 DOI: 10.1016/j.joca.2018.07.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 02/21/2018] [Revised: 07/12/2018] [Accepted: 07/21/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE FGFR3 chondrodysplasia is caused by a gain-of-function mutation of the FGFR3 gene. The disease causes abnormal growth plate cartilage and lacks effective drug treatment. We sought to establish an in vivo model for the study of FGFR3 chondrodysplasia pathology and drug testing. DESIGN We created cartilage from human induced pluripotent stem cells (hiPSCs) and transplanted the cartilage into the subcutaneous spaces of immunodeficient mice. We then created cartilage from the hiPSCs of patients with FGFR3 chondrodysplasia and transplanted them into immunodeficient mice. We treated some mice with a FGFR inhibitor after the transplantation. RESULTS Xenografting the hiPSC-derived cartilage reproduced human growth plate cartilage consisting of zones of resting, proliferating, prehypertrophic and hypertrophic chondrocytes and bone in immunodeficient mice. Immunohistochemistry of xenografts using anti-human nuclear antigen antibody indicated that all chondrocytes in growth plate cartilage were human, whereas bone was composed of human and mouse cells. The pathology of small hypertrophic chondrocytes due to up-regulated FGFR3 signaling in FGFR3 skeletal dysplasia was recapitulated in growth plate cartilage formed in the xenografts of patient-specific hiPSC-derived cartilage. The mean diameters of hypertrophic chondrocytes between wild type and thanatophoric dysplasia were significantly different (95% CI: 13.2-26.9; n = 4 mice, one-way analysis of variance (ANOVA)). The pathology was corrected by systemic administration of a FGFR inhibitor to the mice. CONCLUSION The patient-specific growth plate cartilage xenograft model for FGFR3 skeletal dysplasia indicated recapitulation of pathology and effectiveness of a FGFR inhibitor for treatment and warrants more study for its usefulness to study disease pathology and drug testing.
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Affiliation(s)
- T Kimura
- Cell Induction and Regulation Field, Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Japan; Department of Pediatrics, Osaka University Graduate School of Medicine, Japan
| | - T Ozaki
- Cell Induction and Regulation Field, Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Japan
| | - K Fujita
- Cell Induction and Regulation Field, Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Japan
| | - A Yamashita
- Cell Induction and Regulation Field, Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Japan
| | - M Morioka
- Cell Induction and Regulation Field, Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Japan
| | - K Ozono
- Department of Pediatrics, Osaka University Graduate School of Medicine, Japan
| | - N Tsumaki
- Cell Induction and Regulation Field, Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Japan.
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Terada S, Irikoma S, Yamashita A, Murakoshi T. Incidence of respiratory depression after epidural administration of morphine for cesarean delivery: findings using a continuous respiratory rate monitoring system. Int J Obstet Anesth 2018; 38:32-36. [PMID: 30477999 DOI: 10.1016/j.ijoa.2018.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/12/2018] [Accepted: 10/21/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Epidural morphine is widely used for postoperative analgesia after cesarean delivery. However, respiratory depression can occur after neuraxial administration of morphine. Previous reports describing respiratory depression in obstetric patients have relied on intermittent visual counting of the respiratory rate. In this study, we estimated the incidence of respiratory depression in patients who had received epidural morphine after cesarean delivery, using a continuous respiratory rate monitoring system with a finger sensor. METHODS One hundred patients scheduled to undergo elective cesarean delivery and receive intraoperative neuraxial morphine between April and December 2016 were recruited for this single-center, prospective observational study. Postoperatively, all patients received epidural morphine 3 mg and were equipped with the Nellcor respiratory rate monitoring system. Respiratory depression was defined as both bradypnea (respiratory rate ≤10 breaths/min) and oxygen desaturation (mild ≤95%; moderate ≤90%; severe ≤85%) for longer than one minute. The number of patients with respiratory depression between administration of morphine and first ambulation was recorded hourly. RESULTS Complete monitoring was obtained for 89 of 100 women. The median duration of monitoring was 19.0 hours. Forty-six patients (52%) developed mild respiratory depression at least once before ambulation, but only one (1%) developed moderate respiratory depression. None required supplemental oxygen or naloxone. CONCLUSIONS Approximately half the women experienced mild respiratory depression, but only one developed moderate respiratory depression. Continuous respiratory rate monitoring until ambulation may assist in early identification of respiratory depression after neuraxial administration of morphine.
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Affiliation(s)
- S Terada
- Department of Obstetrics and Gynecology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan.
| | - S Irikoma
- Department of Obstetrics and Gynecology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
| | - A Yamashita
- Department of Obstetrics and Gynecology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
| | - T Murakoshi
- Department of Obstetrics and Gynecology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
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Shichiji M, Ishigaki K, Sato T, Yamashita A, Nagata S. CONGENITAL MUSCULAR DYSTROPHIES. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.371] [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: 11/16/2022]
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17
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Fukuda H, Yamashita A, Imai T, Tsumaki H, Nagata N, Ishikawa H, Niihara M, Tsubosa Y, Onozawa Y. Preventive effect of nutrition support on peroneal neuropathy in cancer patients. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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18
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Yang N, An Q, Yamakawa H, Tamura Y, Yamashita A, Takahashi K, Kinomoto M, Yamasaki H, Itkonen M, Alnajjar FS, Shimoda S, Asama H, Hattori N, Miyai I. Clarification of muscle synergy structure during standing-up motion of healthy young, elderly and post-stroke patients. IEEE Int Conf Rehabil Robot 2018; 2017:19-24. [PMID: 28813787 DOI: 10.1109/icorr.2017.8009215] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Standing-up motion is an important daily activity. It has been known that elderly and post-stroke patients have difficulty in performing standing-up motion. The standing-up motion is retrained by therapists to maximize independence of the elderly and post-stroke patients, but it is not clear how the elderly and post-stroke patients control their redundant muscles to achieve standing-up motion. This study employed the concept of muscle synergy to analyze how healthy young adults, healthy elderly people and post-stroke patients control their muscles. Experimental result verified that four muscle synergies can represent human standing-up motion. In addition, it indicated that the post-stroke patients shift the weights of muscle synergies to finish standing-up motion comparing to healthy subjects. Moreover, different muscle synergy structures were associated with the CoM and joint kinematics.
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Yokota T, Hamauchi S, Yoshida Y, Yurikusa T, Suzuki M, Yamashita A, Ogawa H, Onoe T, Mori K, Onitsuka T. The phase II study of HMB/Arg/Gln against oral mucositis induced by chemoradiotherapy for head and neck cancer patients. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx374.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Gi T, Sato Y, Tokumitsu T, Yamashita A, Moriguchi-Goto S, Takeshima H, Sato S, Asada Y. Cover Image. Cytopathology 2017. [DOI: 10.1111/cyt.12452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Yamashita A, Murakami T, Kadowaki S, Yoshida K, Ito E, Matsuda N, Chang F, Hattori N, Miyai I, Ugawa Y. Spike-timing dependent plasticity at spinal motoneurons. Brain Stimul 2017. [DOI: 10.1016/j.brs.2017.01.157] [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] Open
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22
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Sano T, Nagayasu S, Suzuki S, Iwashita M, Yamashita A, Shinjo T, Sanui T, Kushiyama A, Kanematsu T, Asano T, Nishimura F. Epicatechin downregulates adipose tissue CCL19 expression and thereby ameliorates diet-induced obesity and insulin resistance. Nutr Metab Cardiovasc Dis 2017; 27:249-259. [PMID: 28062181 DOI: 10.1016/j.numecd.2016.11.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 08/15/2016] [Revised: 11/05/2016] [Accepted: 11/11/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Epicatechin (EC) intake has been suggested to be beneficial for the prevention of cardiovascular disorders, and it is well known that adipose tissue inflammation is one of the major risk factors for coronary heart diseases. The purpose of the present study was to determine the in vitro and in vivo effects of EC on adipose tissue inflammation and obesity. METHODS AND RESULTS DNA microarray analysis was performed to evaluate the effects of EC on gene expression in adipocytes co-cultured with bacterial endotoxin-stimulated macrophages. To determine the in vivo effects of the catechin, C57BL/6 mice were fed either a high-fat diet (HFD) or HFD combined with EC, and metabolic changes were observed EC suppressed the expression of many inflammatory genes in the adipocytes co-cultured with endotoxin-stimulated macrophages. Specifically, EC markedly suppressed chemokine (CC motif) ligand 19 (CCL19) expression. The target cell of EC appeared to macrophages. The in vivo study indicated that mice fed the EC-supplemented HFD were protected from diet-induced obesity and insulin resistance. Accordingly, the expression levels of genes associated with inflammation in adipose tissue and in the liver were downregulated in this group of mice. CONCLUSIONS EC exerts beneficial effects for the prevention of adipose tissue inflammation and insulin resistance. Since we previously reported that mice deficient in the CCL19 receptor were protected from diet-induced obesity and insulin resistance, it can be concluded that the beneficial effects of EC could be mediated, at least in part, by marked suppression of CCL19 expression.
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Affiliation(s)
- T Sano
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - S Nagayasu
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Suzuki
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - M Iwashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Yamashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Shinjo
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Sanui
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Kushiyama
- Division of Metabolic Diseases, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan
| | - T Kanematsu
- Department of Cellular and Molecular Pharmacology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - T Asano
- Department of Biological Chemistry, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - F Nishimura
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan.
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Gi T, Sato Y, Tokumitsu T, Yamashita A, Moriguchi-Goto S, Takeshima H, Sato S, Asada Y. Microvascular proliferation of brain metastases mimics glioblastomas in squash cytology. Cytopathology 2016; 28:228-234. [PMID: 27995658 DOI: 10.1111/cyt.12405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/13/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Although microvascular proliferation is a key feature in the diagnosis of high-grade glioma, the characteristics of metastatic tumour vessels in smear preparations have not been documented. In this study, the vascular changes in metastatic brain tumours, using squash cytology to examine the vascular patterns in brain metastases, were reviewed. METHODS One hundred and forty-three squash smears of brain tissue, including 25 normal or reactive tissue, 23 malignant lymphomas, 8 grade I glioma (pilocytic astrocytoma), 23 grade II glioma (diffuse astrocytoma and oligodendroglioma), 42 grade IV glioma (glioblastoma), and 22 metastasis, were assessed. Two vascular patterns were assessed: thick and branching, and glomeruloid. The vessel density, nuclear layer and the number of vessel branches were compared. Furthermore, tumour vessels of brain metastases were analysed by histology and for immunohistochemical expression of CD34, α-smooth muscle actin (SMA) and high-molecular-weight caldesmon (h-CD). RESULTS Among 22 metastatic tumours, thick and branching vessels were found in 17 (77%) and glomeruloid vessels in 13 (59%). These incidences of microvascular proliferation patterns were similar to those of glioblastomas or pilocytic astrocytomas. Vessel density, nuclear layer and vessel wall branches were significantly higher in metastatic tumours than malignant lymphomas, grade II gliomas or normal brain tissues. Glomeruloid vessels consisted of CD34-positive cells and α-SMA-positive cells, and α-SMA-positive cells had a low h-CD expression. These immunohistochemical patterns were similar to those of high-grade gliomas. CONCLUSIONS The vascular features of metastatic brain tumours are similar to those of glioblastomas, suggesting that these microvascular proliferations contribute to the progression of metastatic tumours.
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Affiliation(s)
- T Gi
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Y Sato
- Department of Diagnostic Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - T Tokumitsu
- Department of Diagnostic Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - A Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - S Moriguchi-Goto
- Department of Diagnostic Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - H Takeshima
- Department of Neurosurgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - S Sato
- Department of Medical Technology and Sciences, International University of Health and Welfare, Fukuoka, Japan
| | - Y Asada
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
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24
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Nakanishi K, Yamashita A, Miyamoto T, Takeguch R, Furuya A, Matsuo K, Tanahashi Y, Kawamura M, Sengoku K. P450 oxidoreductase deficiency with maternal virilization during pregnancy. CLIN EXP OBSTET GYN 2016. [DOI: 10.12891/ceog3172.2016] [Citation(s) in RCA: 3] [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: 11/01/2022]
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25
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Tokumitsu T, Sato Y, Yamashita A, Moriguchi-Goto S, Kondo K, Nanashima A, Asada Y. Immunocytochemistry for Claudin-18 and Maspin in biliary brushing cytology increases the accuracy of diagnosing pancreatobiliary malignancies. Cytopathology 2016; 28:116-121. [PMID: 27527114 DOI: 10.1111/cyt.12368] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2016] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Biliary brush cytology is an important diagnostic tool in the evaluation of pancreatobiliary malignancies. However, it is difficult to distinguish between malignant and benign cells. The present study evaluated the utility of immunocytochemical expression of Claudin-18 and Maspin in brushing cytology specimens of pancreatobiliary lesions in the diagnosis of pancreatobiliary malignancies. METHODS The study retrospectively assessed biliary and pancreatic duct brushing cytology specimens of 43 patients whose pancreatobiliary lesions were histologically diagnosed at the University of Miyazaki Hospital. Scanty cellularity slides and cases with no histological confirmation were excluded. Alcohol-fixed and Papanicolaou-stained slides were immunostained with monoclonal antibodies to Claudin-18 and Maspin. RESULTS Of the 43 patients, 35 (81.4%) were finally histologically diagnosed with invasive adenocarcinomas. The sensitivity of routine cytology for the detection of malignancy was 63%, and the specificity was 100%. The sensitivity of cytology in combination with immunocytochemical expression of Claudin-18 (89%) or Claudin-18 and/or Maspin (97%) was significantly higher than that of cytology alone (P < 0.01). CONCLUSION Immunocytochemical staining for Claudin-18 and Maspin improved the diagnostic sensitivity for pancreatobiliary adenocarcinomas.
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Affiliation(s)
- T Tokumitsu
- Division of Pathology, Faculty of Medicine, University of Miyazaki Hospital, Miyazaki, Japan
| | - Y Sato
- Division of Pathology, Faculty of Medicine, University of Miyazaki Hospital, Miyazaki, Japan.,Department of Diagnostic Pathology, Faculty of Medicine, University of Miyazaki Hospital, Miyazaki, Japan
| | - A Yamashita
- Department of Pathology, Faculty of Medicine, Miyazaki, Japan
| | - S Moriguchi-Goto
- Division of Pathology, Faculty of Medicine, University of Miyazaki Hospital, Miyazaki, Japan.,Department of Diagnostic Pathology, Faculty of Medicine, University of Miyazaki Hospital, Miyazaki, Japan
| | - K Kondo
- Community Medical Center, Faculty of Medicine, Miyazaki, Japan
| | - A Nanashima
- Division of Hepato-Biliary-Pancreas Surgery, Department of Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Y Asada
- Department of Pathology, Faculty of Medicine, Miyazaki, Japan
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26
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Li ZY, Yamashita A, Kawashita N, Sasaki T, Pan Y, Ono KI, Ikuta K, Li YG. Characterization of two anti-dengue human monoclonal antibodies prepared from PBMCs of patients with dengue illness in Thailand. Acta Virol 2016; 60:166-73. [PMID: 27265466 DOI: 10.4149/av_2016_02_166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The global spread of the four dengue virus (DENV) serotypes (dengue-1 to -4) has made this virus a major and growing public health concern. Generally, pre-existing neutralizing antibodies derived from primary infection play a significant role in protecting against subsequent infection with the same serotype. By contrast, these pre-existing antibodies are believed to mediate a non-protective response to subsequent heterotypic DENV infections, leading to the onset of dengue illness. In this study, two monoclonal antibodies prepared by using peripheral blood mononuclear cells (PBMCs) from patients with dengue fever were characterized. Epitope mapping revealed that amino acid residues 254-278 in domain II of the viral envelope protein E were the target region of these antibodies. A database search revealed that certain sequences in this epitope region showed high conservation among the four serotypes of DENV. These two human monoclonal antibodies could neutralize DENV-2,-4 more effectively than DENV-1,-3. The amino acid sequences could not explain this difference in neutralizing activity. However, the 3D structure results showed that amino acid 274 could be the critical residue for the difference in neutralization. These results may provide basic information for the development of a dengue vaccine.
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27
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Tamura K, Wakui H, Azushima K, Uneda K, Haku S, Kobayashi R, Ohki K, Haruhara K, Kinguchi S, Matsuda M, Yamashita A, Umemura S. Angiotensin II Type 1 Receptor Binding Molecule ATRAP as a Possible Modulator of Renal Sodium Handling and Blood Pressure in Pathophysiology. Curr Med Chem 2016; 22:3210-6. [PMID: 26295465 DOI: 10.2174/0929867322666150821095036] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 08/19/2015] [Accepted: 08/20/2015] [Indexed: 11/22/2022]
Abstract
Exaggerated activation of the renin-angiotensin system via tissue angiotensin II (Ang II) type 1 receptor (AT1R) signaling exerts detrimental effects on cardiovascular, renal and endocrine systems to provoke hypertension and related target organ damage. On the other hand, accumulated research evidence of both basic and clinical studies shows that physiological AT1R signaling also plays an indispensable role for the normal organ development such as the kidney and the maintenance of cardiovascular and renal homeostasis. Such functional diversity of AT1R signaling prompts us to seek a new strategy of selective modulation of AT1R signaling in pathophysiology. In the course of an investigational search for a means to functionally and selectively modulate AT1R signaling for that purpose, a molecule directly interacting with the carboxyl-terminal cytoplasmic domain of AT1R was identified by employing yeast two-hybrid screening of a mouse kidney cDNA library and named AT1R-associated protein (ATRAP). The results of functional analysis showed that ATRAP promotes constitutive AT1R internalization in cultured cells and inhibits Ang II-mediated pathological response in mouse distal convoluted cells. The ATRAP is expressed in a variety of tissues including the kidney where ATRAP is abundantly distributed in epithelial cells along the renal tubules. The results employing genetic engineered mice with modified ATRAP expression showed that ATRAP plays a key role in the regulation of renal sodium handling and the modulation of blood pressure in response to pathological stimuli such as chronic Ang II infusion, and suggest ATRAP to be a target of interest.
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Affiliation(s)
- K Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan.
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Nakanishi K, Yamashita A, Miyamoto T, Takeguchi R, Furuya A, Matsuo K, Tanahashi Y, Kawamura M, Sengoku K. P450 oxidoreductase deficiency with maternal virilization during pregnancy. CLIN EXP OBSTET GYN 2016; 43:902-904. [PMID: 29944250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE The authors report on a rare case of maternal virilization during pregnancy caused by autosomal recessive P450 oxidore- ductase (POR) deficiency. MATERIALS AND METHODS A 24-year-old primigravida developed a deepening voice and hirsutism in the second trimester. Prenatal ultrasonography failed to detect any fetal abnormality and fetal growth was normal. POR deficiency was suspected, but the mother declined fetal genetic testing. A female neonate was delivered by cesarean section at 41 weeks' gestation. RESULTS The neonate had skeletal abnormalities. Mutational analysis of the POR gene demonstrated homozygosity for c.1370 G>A and p.R457H in the patient and heterozygosity in her parents. POR deficiency was confirmed in the neonate. CONCLUSION POR deficiency should be suspected in cases of maternal virilization. Maternal urinary estriol, fetal magnetic resonance imaging, and parental genetic testing should be performed. Parental consent for fetal genetic testing should be sought to ensure prompt diagnosis and early treatment.
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Torigoe K, Arai H, Yamashita A, Muraya Y, Obata Y, Nishino T. Improvements in Pneumatosis Cystoides Intestinalis and Hepatic Portal Venous Gas with Conservative Therapy in a Patient on Maintenance Dialysis. Intern Med 2016; 55:1735-8. [PMID: 27374673 DOI: 10.2169/internalmedicine.55.6235] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 77-year-old man on maintenance dialysis developed hypotension, nausea and abdominal pain one hour after beginning to undergo hemodialysis. Abdominal computed tomography (CT) showed gas shadows in the intrahepatic portal vein and the small intestinal wall, but no signs indicating intestinal necrosis. Three days later, the gas shadows on abdominal CT disappeared by conservative therapy. In cases with both pneumatosis cystoides intestinalis and hepatic portal venous gas, intestinal necrosis should therefore be suspected and surgical therapy should also be considered, particularly in hemodialysis patients with a risk of intestinal ischemia. However, conservative therapy may be an option in cases with no intestinal necrosis.
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Affiliation(s)
- Kenta Torigoe
- Department of Internal Medicine, Japan Community Health Care Organization, Isahaya General Hospital, Japan
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Niihara M, Tsubosa Y, Yamashita A, Tsumaki H, Ishikawa H, Nagata N, Onozawa Y, Fukuda H. SUN-PP136: Changes in Body Weight and Body Mass Index After Esophagectomy. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30286-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Abdel-Hakiem M, Yamashita A, Atiba A, Okamura Y, Katayama M, Youssef H, Isomura H, Uzuka Y. Expression of NG2 proteoglycan in the degenerated intervertebral disc in dachshunds. J Vet Med Sci 2015; 78:97-100. [PMID: 26300439 PMCID: PMC4751123 DOI: 10.1292/jvms.14-0233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The pathogenesis of intervertebral disc (IVD) degeneration is not fully understood. The
biomolecular signaling pathways involved in the IVD degeneration require further
investigation. The aim of this study was to investigate the expression of NG2 proteoglycan
in the degenerated IVD. IVD samples were obtained from 16 Dachshunds that were confirmed
to have IVD herniation and subsequently underwent hemilaminectomy. The samples were
subjected to histological and immunohistochemical (IHC) examinations. IHC revealed
positive results for the expression of NG2 proteoglycan in all examined samples. The
results showed the expression of NG2 proteoglycan by the degenerated IVDs.
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Affiliation(s)
- Mohammed Abdel-Hakiem
- Division of Veterinary Diagnostic Imaging, Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan
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Arimoto T, Kawana K, Adachi K, Ikeda Y, Nagasaka K, Tsuruga T, Yamashita A, Oda K, Ishikawa M, Kasamatsu T, Onda T, Konishi I, Yoshikawa H, Yaegashi N. Minimization of curative surgery for treatment of early cervical cancer: a review. Jpn J Clin Oncol 2015; 45:611-6. [DOI: 10.1093/jjco/hyv048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 03/10/2015] [Indexed: 11/14/2022] Open
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Tachibana K, Higami T, Miyaki Y, Hagiwara T, Yamashita A, Takagi N. 136 * IMPACT OF SEQUENTIAL BYPASS GRAFTING WITH FULL SKELETONISED IN-SITU ARTERIAL GRAFTS. Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu276.136] [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: 11/14/2022] Open
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34
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Iwakiri T, Matsuura Y, Yamashita A, Uezono S, Hisanaga S, Tokura T, Kitamura K, Asada Y, Fujimoto S. Serum C-reactive protein reflects the proportions of cellular crescent formation and glomerulosclerosis in patients with microscopic polyangiitis. Presse Med 2013. [DOI: 10.1016/j.lpm.2013.02.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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35
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Shindo H, Maekawa S, Komase K, Miura M, Kadokura M, Sueki R, Komatsu N, Shindo K, Amemiya F, Nakayama Y, Inoue T, Sakamoto M, Yamashita A, Moriishi K, Enomoto N. IL-28B (IFN-λ3) and IFN-α synergistically inhibit HCV replication. J Viral Hepat 2013; 20:281-9. [PMID: 23490373 DOI: 10.1111/j.1365-2893.2012.01649.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 06/07/2012] [Indexed: 01/09/2023]
Abstract
Genetic variation in the IL-28B (interleukin-28B; interferon lambda 3) region has been associated with sustained virological response (SVR) rates in patients with chronic hepatitis C treated with peginterferon-α and ribavirin. However, the mechanisms by which polymorphisms in the IL-28B gene region affect host antiviral responses are not well understood. Using the HCV 1b and 2a replicon system, we compared the effects of IFN-λs and IFN-α on HCV RNA replication. The anti-HCV effect of IFN-λ3 and IFN-α in combination was also assessed. Changes in gene expression induced by IFN-λ3 and IFN-α were compared using cDNA microarray analysis. IFN-λs at concentrations of 1 ng/mL or more exhibited concentration- and time-dependent HCV inhibition. In combination, IFN-λ3 and IFN-α had a synergistic anti-HCV effect; however, no synergistic enhancement was observed for interferon-stimulated response element (ISRE) activity or upregulation of interferon-stimulated genes (ISGs). With respect to the time course of ISG upregulation, the peak of IFN-λ3-induced gene expression occurred later and lasted longer than that induced by IFN-α. In addition, although the genes upregulated by IFN-α and IFN-λ3 were similar to microarray analysis, interferon-stimulated gene expression appeared early and was prolonged by combined administration of these two IFNs. In conclusion, IFN-α and IFN-λ3 in combination showed synergistic anti-HCV activity in vitro. Differences in time-dependent upregulation of these genes might contribute to the synergistic antiviral activity.
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Affiliation(s)
- H Shindo
- First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan
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Yonehiro J, Yoshida Y, Yamashita A, Yoshizawa S, Ohta K, Kamata N, Okihara T, Nishimura F. Flavonol-containing phosphorylated pullulan may attenuate pulp inflammation. Int Endod J 2012; 46:119-27. [DOI: 10.1111/j.1365-2591.2012.02095.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Accepted: 06/01/2012] [Indexed: 01/09/2023]
Affiliation(s)
- J. Yonehiro
- Department of Dental Science for Health Promotion; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima Japan
| | - Y. Yoshida
- Department of Biomaterials; Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences; Okayama Japan
| | - A. Yamashita
- Department of Dental Science for Health Promotion; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima Japan
| | - S. Yoshizawa
- Center for Craniofacial Regeneration; Department of Oral Biology; School of Dental Medicine; University of Pittsburgh; Pittsburg PA USA
| | - K. Ohta
- Department of Oral Surgery; Hiroshima University Graduate School of Biomedical Science; Hiroshima Japan
| | - N. Kamata
- Department of Oral Surgery; Hiroshima University Graduate School of Biomedical Science; Hiroshima Japan
| | - T. Okihara
- Department of Material Chemistry; Okayama University Graduate School of Natural Science and Technology; Okayama Japan
| | - F. Nishimura
- Department of Dental Science for Health Promotion; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima Japan
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37
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Yonehiro J, Yamashita A, Yoshida Y, Yoshizawa S, Ohta K, Kamata N, Okihara T, Nishimura F. Establishment of anex vivopulpitis model by co-culturing immortalized dental pulp cells and macrophages. Int Endod J 2012; 45:1103-8. [DOI: 10.1111/j.1365-2591.2012.02074.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Matsuda S, Yamashita A, Sato Y, Kitajima S, Koike T, Sugita C, Moriguchi-Goto S, Hatakeyama K, Takahashi M, Koshimoto C, Matsuura Y, Iwakiri T, Chen YE, Fan J, Asada Y. Human C-reactive protein enhances thrombus formation after neointimal balloon injury in transgenic rabbits. J Thromb Haemost 2011; 9:201-8. [PMID: 21029360 DOI: 10.1111/j.1538-7836.2010.04086.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND High plasma levels of C-reactive protein (CRP) constitute a powerful predictive marker of cardiovascular events. Several lines of evidence suggest that CRP has prothrombogenic effects. However, whether CRP directly participates in the pathogenesis of thrombosis in vivo has not been fully clarified. OBJECTIVE To test whether human CRP (hCRP) affects arterial thrombus formation after balloon injury of smooth muscle cell (SMC)-rich or macrophage-rich neointima. METHODS We compared the susceptibility of transgenic (Tg) rabbits expressing hCRP (46.21 ± 13.85 mg L(-1), n = 22) and non-Tg rabbits to arterial thrombus formation after balloon injury of SMC-rich or macrophage-rich neointima. RESULTS Thrombus size on SMC-rich or macrophage-rich neointima was significantly increased, and was accompanied by an increase in fibrin content in hCRP-Tg rabbits, as compared with non-Tg rabbits. Thrombus size did not significantly differ between SMC-rich and macrophage-rich neointima in hCRP-Tg rabbits. Tissue factor (TF) mRNA expression and activity in these neointimal lesions were significantly increased in hCRP-Tg rabbits as compared with non-Tg rabbits. The degree of CRP deposition correlated with the elevated TF expression and thrombus size on injured neointima. In addition, hCRP isolated from hCRP-Tg rabbit plasma induced TF mRNA expression and activity in rabbit cultured vascular SMCs. CONCLUSIONS These results suggest that elevated plasma hCRP levels promote thrombus formation on injured SMC-rich neointima by enhancing TF expression, but have no additive effects in macrophage-rich neointima.
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MESH Headings
- Animals
- Animals, Genetically Modified
- C-Reactive Protein/genetics
- C-Reactive Protein/metabolism
- Catheterization
- Cell Proliferation
- Cells, Cultured
- Disease Models, Animal
- Femoral Artery/injuries
- Femoral Artery/metabolism
- Femoral Artery/pathology
- Humans
- Hyperlipidemias/genetics
- Hyperlipidemias/metabolism
- Macrophages/metabolism
- Male
- Muscle, Smooth, Vascular/injuries
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- RNA, Messenger/metabolism
- Rabbits
- Thromboplastin/genetics
- Thrombosis/blood
- Thrombosis/genetics
- Thrombosis/metabolism
- Thrombosis/pathology
- Time Factors
- Tunica Intima/injuries
- Tunica Intima/metabolism
- Tunica Intima/pathology
- Up-Regulation
- Vascular System Injuries/blood
- Vascular System Injuries/genetics
- Vascular System Injuries/metabolism
- Vascular System Injuries/pathology
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Affiliation(s)
- S Matsuda
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
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39
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Lira FS, Yamashita A, Carnevali LC, Gonçalves DC, Lima WP, Rosa JC, Caperuto EC, Rosa LFC, Seelaender M. Exercise training reduces PGE2 levels and induces recovery from steatosis in tumor-bearing rats. Horm Metab Res 2010; 42:944-9. [PMID: 21064006 DOI: 10.1055/s-0030-1267949] [Citation(s) in RCA: 15] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The effects of endurance training on PGE (2) levels and upon the maximal activity of hepatic carnitine palmitoyltransferase (CPT) system were studied in rats bearing the Walker 256 carciosarcoma. Animals were randomly assigned to a sedentary control (SC), sedentary tumor-bearing (ST), exercised control (EC), and as an exercised tumor-bearing (ET) group. Trained rats ran on a treadmill (60% VO (2) max) for 60 min/day, 5 days/week, for 8 weeks. We examined the mRNA expression (RT-PCR) and maximal activity (radioassay) of the carnitine palmitoyltransferase system enzymes (CPT I and CPT II), as well as the gene expression of fatty-acid-binding protein (L-FABP) in the liver. PGE (2) content was measured in the serum, in tumor cells, and in the liver (ELISA). CPT I and CPT II maximal activity were decreased (p<0.01) in ST when compared with SC. In contrast, serum PGE (2) was increased (p<0.05) in cachectic animals as compared with SC. In the liver, PGE (2) content was also increased (p<0.05) when compared with SC. Endurance training restored maximal CPT I and CPT II activity in the tumor-bearing animals (p<0.0001). Exercise training induced PGE (2) levels to return to control values in the liver of tumor-bearing training rats (p<0.05) and decreased the eicosanoid content in the tumor (p<0.01). In conclusion, endurance training was capable of reestablishing liver carnitine palmitoyltransferase (CPT) system activity associated with decreased PGE (2) levels in cachectic tumor-bearing animals, preventing steatosis.
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Affiliation(s)
- F S Lira
- Cancer Metabolism Research Group, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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40
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Sumi T, Yamashita A, Matsuda S, Goto S, Nishihira K, Furukoji E, Sugimura H, Kawahara H, Imamura T, Kitamura K, Tamura S, Asada Y. Disturbed blood flow induces erosive injury to smooth muscle cell-rich neointima and promotes thrombus formation in rabbit femoral arteries. J Thromb Haemost 2010; 8:1394-402. [PMID: 20230423 DOI: 10.1111/j.1538-7836.2010.03843.x] [Citation(s) in RCA: 32] [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: 10/19/2022]
Abstract
BACKGROUND Plaque erosion is a cause of atherothrombosis that preferentially occurs on smooth muscle cell (SMC)- and proteoglycan-rich rather than lipid-rich plaques. However, its underlying mechanisms remain unknown. OBJECTIVE To determine whether disturbed blood flow induces erosive injury and thrombus formation on SMC-rich neointima. METHODS Three weeks after balloon injury, SMC-rich neointima with increased tissue factor (TF) activity developed in rabbit femoral arteries that were narrowed with a vascular occluder to disturb blood flow after stenosis. Neointimal injury and thrombus formation were assessed at 15, 30, and 180 min after the vascular narrowing. RESULTS Endothelial detachment, platelet adhesion and neointimal cell apoptosis became evident at the post-stenotic regions of all femoral arteries (n = 5) within 15 min of narrowing. Mural thrombi composed of platelet and fibrin developed after 30 min, and then occlusive thrombi were generated in three out of five vessels after 180 min. The identical vascular narrowing of normal femoral arteries also induced endothelial detachment with small platelet thrombi at post-stenotic regions, but fibrin and occlusive thrombi did not develop. Computational simulation analysis indicated that oscillatory shear stress contributes to the development of erosive damage to the neointima. CONCLUSIONS These results suggest that disturbed post-stenotic blood flow can induce erosive injury in SMC-rich plaques and promote thrombus formation that results in vascular events.
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Affiliation(s)
- T Sumi
- Department of Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
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41
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Oka S, Toshida T, Maruyama K, Nakajima K, Yamashita A, Sugiura T. 2-Arachidonoyl-sn-glycero-3-phosphoinositol: A Possible Natural Ligand for GPR55. J Biochem 2008; 145:13-20. [DOI: 10.1093/jb/mvn136] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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42
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Yamashita A, Soga Y, Iwamoto Y, Asano T, Li Y, Abiko Y, Nishimura F. DNA microarray analyses of genes expressed differentially in 3T3-L1 adipocytes co-cultured with murine macrophage cell line RAW264.7 in the presence of the toll-like receptor 4 ligand bacterial endotoxin. Int J Obes (Lond) 2008; 32:1725-9. [PMID: 18779827 DOI: 10.1038/ijo.2008.153] [Citation(s) in RCA: 38] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Recent studies have suggested that macrophages were integrated into adipose tissues to interact with adipocytes, thereby exacerbating inflammatory responses. Furthermore, both adipocytes and macrophages appear to express toll-like receptor-4 (TLR-4), and free fatty acids may stimulate cells through TLR-4. Herein, we analyzed genes differentially expressed in adipocytes when co-cultured with macrophages in the presence of a ligand for TLR-4, bacterial lipopolysaccharide (LPS). RAW264.7, a murine macrophage cell line and differentiated 3T3-L1 adipocytes were co-cultured using a transwell system. Genes differentially expressed in adipocytes were analyzed by the DNA microarray method following 4, 8, 12 and 24 h stimulation with 1 ng ml(-1) of Escherichia coli LPS. Randomly selected genes with high expressions were confirmed by quantitative methods at both the gene and the protein level. Co-culture of macrophages and adipocytes with a low LPS concentration (1 ng ml(-1)) markedly upregulated gene expressions associated with inflammation and/or angiogenesis, such as those of interleukin-6 (IL-6), MCP-1, RANTES and CXCL1/KC, in adipocytes. Furthermore, several genes associated with insulin resistance were differentially expressed. Upregulations of genes encoding MCP-1, RANTES and CXC/KC were confirmed by quantitative methods. These results suggest that ligands for TLR-4 stimulate both adipocytes and macrophages to upregulate the expressions of many genes associated with inflammation and/or angiogenesis.
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Affiliation(s)
- A Yamashita
- Department of Dental Science for Health Promotion, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
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43
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Miyaura K, Morita M, Matsuka Y, Yamashita A, Watanabe T. Rehabilitation of biting abilities in patients with different types of dental prostheses. J Oral Rehabil 2008. [DOI: 10.1111/j.1365-2842.2000.00620.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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44
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Kuboki T, Takenami Y, Maekawa K, Shinoda M, Yamashita A, Clark GT. Biomechanical calculation of human TM joint loading with jaw opening. J Oral Rehabil 2008. [DOI: 10.1111/j.1365-2842.2000.00582.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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45
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Nishihira K, Yamashita A, Tanaka N, Moriguchi-Goto S, Imamura T, Ishida T, Kawashima S, Yamamoto R, Kitamura K, Asada Y. Serotonin induces vasoconstriction of smooth muscle cell-rich neointima through 5-hydroxytryptamine2A receptor in rabbit femoral arteries. J Thromb Haemost 2008; 6:1207-14. [PMID: 18435827 DOI: 10.1111/j.1538-7836.2008.02996.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Smooth muscle cell (SMC)-rich intima is a morphological feature of atherosclerotic lesions that is observed in eroded plaque and spastic arteries. Arteries with SMC-rich intima are susceptible to vasoconstriction or vasospasm against some vasoactive agents. OBJECTIVE The present study evaluates the contribution of SMC-rich intima to thrombogenic vasoconstriction. METHODS We established SMC-rich neointima by damaging rabbit femoral arteries using balloons and then measured the isometric tension of the femoral strips against 5-hydroxytryptamine (5-HT), adenosine diphosphate, adenosine triphosphate and thrombin. RESULTS Among these agents, only 5-HT induced a hypercontractile response of the injured arteries with SMC-rich neointima, compared with non-injured arteries. Smooth muscle cells of both the neointima and media expressed 5-HT(2A) receptor, and sarpogrelate, a selective 5-HT(2A) receptor antagonist significantly inhibited the hypercontraction. Furthermore, 5-HT induced contraction of separated neointima and hypercontraction of separated media compared with non-injured media. Sarpogrelate and fasudil, a specific Rho-kinase inhibitor, significantly suppressed such contraction of both the neointima and media of injured arteries. CONCLUSIONS These results suggest that 5-HT plays a crucial role in thrombogenic vasoconstriction, and that SMC-rich intima as well as media directly contributes to the hypercontractile response of atherosclerotic vessels through the 5-HT(2A) receptor and the Rho-kinase pathway.
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Affiliation(s)
- K Nishihira
- Division of Circulatory and Body Fluid Regulation, Department of Internal Medicine, University of Miyazaki, Miyazaki, Japan
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46
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Yamashita A, Shoji K, Tsuruda T, Furukoji E, Takahashi M, Nishihira K, Tamura S, Asada Y. Medial and adventitial macrophages are associated with expansive atherosclerotic remodeling in rabbit femoral artery. Histol Histopathol 2008; 23:127-36. [PMID: 17999368 DOI: 10.14670/hh-23.127] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Expansive vascular remodeling is considered a feature of vulnerable plaques. Although inflammation is upregulated in the media and adventitia of atherosclerotic lesions, its contribution to expansive remodeling is unclear. We investigated this issue in injured femoral arteries of normo- and hyperlipidemic rabbits fed with a conventional (CD group; n=20) or a 0.5% cholesterol (ChD group; n=20) diet. Four weeks after balloon injury of the femoral arteries, we examined vascular wall alterations, localization of macrophages and matrix metalloproteases (MMP)-1, -2, -9, and extracellular matrix. Neointimal formation with luminal stenosis was evident in both groups, while expansive remodeling was observed only in the ChD group. Areas immunopositive for macrophages, MMP-1, -2 and -9 were larger not only in the neointima, but also in the media and/or adventitia in the injured arterial walls of the ChD, than in the CD group. Areas containing smooth muscle cells (SMCs), elastin and collagen were smaller in the injured arterial walls of the ChD group. MMP-1, -2 and -9 were mainly localized in infiltrating macrophages. MMP-2 was also found in SMCs and adventitial fibroblasts. Vasa vasorum density was significantly increased in injured arteries of ChD group than in those of CD group. These results suggest that macrophages in the media and adventitia play an important role in expansive atherosclerotic remodeling via extracellular matrix degradation and SMC reduction.
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Affiliation(s)
- A Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
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47
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Okuyama T, Kurata S, Tomimori Y, Fukunishi N, Sato S, Osada M, Tsukinoki K, Jin HF, Yamashita A, Ito M, Kobayashi S, Hata RI, Ikawa Y, Katoh I. p63(TP63) elicits strong trans-activation of the MFG-E8/lactadherin/BA46 gene through interactions between the TA and DeltaN isoforms. Oncogene 2007; 27:308-17. [PMID: 17637751 DOI: 10.1038/sj.onc.1210646] [Citation(s) in RCA: 16] [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: 12/28/2022]
Abstract
We report here that human MFGE8 encoding milk fat globule-EGF factor 8 protein (MFG-E8), also termed 46 kDa breast epithelial antigen and lactadherin, is transcriptionally activated by p63, or TP63, a p53 (TP53) family protein frequently overexpressed in head-and-neck squamous cell carcinomas, mammary carcinomas and so on. Despite that human MFG-E8 was originally identified as a breast cancer marker, and has recently been reported to provide peptides for cancer immunotherapy, its transcriptional control remains an open question. Observations in immunohistochemical analyses, a tetracycline-induced p63 expression system and keratinocyte cultures suggested a physiological link between p63 and MFGE8. By reporter assays with immediately upstream regions of MFGE8, we determined that the trans-activator (TA) isoforms of p63 activate MFGE8 transcription though a p53/p63 motif at -370, which was confirmed by a chromatin immunoprecipitation experiment. Upon siRNA-mediated p63 silencing in a squamous cell carcinoma line, MFG-E8 production decreased to diminish Saos-2 cell adhesion. Interestingly, the DeltaN-p63 isoform lacking the TA domain enhanced the MFGE8-activating function of TA-p63, if DeltaN-p63 was dominant over TA-p63 as typically observed in undifferentiated keratinocytes and squamous cell carcinomas, implying a self-regulatory mechanism of p63 by the TA:DeltaN association. MFG-E8 may provide a novel pathway of epithelial-nonepithelial cell interactions inducible by p63, probably in pathological processes.
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Affiliation(s)
- T Okuyama
- Ikawa Laboratory, RIKEN, Wako, Japan
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48
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Tamura N, Soejima K, Moriguchi-Goto S, Yamashita A, Asada Y, Goto S. FUNCTIONAL REGULATION OF VON WILLEBRAND FACTOR ON THE FORMATION OF PLATELET THROMBI UNDER BLOOD FLOW CONDITION BY ITS SPECIFIC CLEAVING PROTEASE OF ADAMTS13. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb02754.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Yang PT, Kasai H, Xiao WG, Zhao LJ, He LM, Yamashita A, Deng XW, Ito M. Increased expression of macrophage colony-stimulating factor in ankylosing spondylitis and rheumatoid arthritis. Ann Rheum Dis 2006; 65:1671-2. [PMID: 17105859 PMCID: PMC1798478 DOI: 10.1136/ard.2006.054874] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [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]
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50
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Nagano J, Iyonaga K, Kawamura K, Yamashita A, Ichiyasu H, Okamoto T, Suga M, Sasaki Y, Kohrogi H. Use of tacrolimus, a potent antifibrotic agent, in bleomycin-induced lung fibrosis. Eur Respir J 2006; 27:460-9. [PMID: 16507844 DOI: 10.1183/09031936.06.00070705] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Idiopathic pulmonary fibrosis has a poor prognosis and few efficacious treatments. The immunosuppressant cyclosporin A has been shown to inhibit tumour growth factor (TGF)-beta-induced collagen deposition in vitro, and is widely used in Japan as a potent antifibrotic agent. Tacrolimus (FK506) is another attractive immunosuppressant, which may be useful in the treatment of pulmonary fibrosis. The aim of the present study was to elucidate the antifibrotic effect of FK506. The inhibitory effect of FK506 on collagen synthesis in cultured lung fibroblastic cells, TIG-3-20, and its antifibrotic effect on bleomycin (BLM)-induced pulmonary fibrosis in mice was investigated. FK506 inhibited TGF-beta-induced collagen synthesis, and suppressed the expression of TGF-beta type I receptor (TbetaR-I) in TIG-3-20 cells. Consistent with the in vitro findings, FK506 treatment starting on day 6 attenuated BLM-induced pulmonary fibrosis, in part, via reduced TbetaR-I expression. FK506 treatment in the acute BLM injury phase unexpectedly increased pro-inflammatory cytokine levels in bronchoalveolar lavage fluid and enhanced lung injury, resulting in poor survival. In conclusion, the present results suggest that FK506 has a potent antifibrotic effect and may be useful for the treatment of pulmonary fibrosis, although its use in the acute inflammatory phase may exacerbate lung injury.
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Affiliation(s)
- J Nagano
- Dept of Respiratory Medicine, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
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