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D'Addario CA, Matsumura S, Kitagawa A, Lainer GM, Zhang F, D'silva M, Khan MY, Froogh G, Gruzdev A, Zeldin DC, Schwartzman ML, Gupte SA. Global and endothelial G-protein coupled receptor 75 (GPR75) knockout relaxes pulmonary artery and mitigates hypoxia-induced pulmonary hypertension. Vascul Pharmacol 2023; 153:107235. [PMID: 37742819 PMCID: PMC10841449 DOI: 10.1016/j.vph.2023.107235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 09/04/2023] [Accepted: 09/21/2023] [Indexed: 09/26/2023]
Abstract
RATIONALE Pulmonary hypertension (PH) is a multifactorial disease with a poor prognosis and inadequate treatment options. We found two-fold higher expression of the orphan G-Protein Coupled Receptor 75 (GPR75) in leukocytes and pulmonary arterial smooth muscle cells from idiopathic PH patients and from lungs of C57BL/6 mice exposed to hypoxia. We therefore postulated that GPR75 signaling is critical to the pathogenesis of PH. METHODS To test this hypothesis, we exposed global (Gpr75-/-) and endothelial cell (EC) GPR75 knockout (EC-Gpr75-/-) mice and wild-type (control) mice to hypoxia (10% oxygen) or normal atmospheric oxygen for 5 weeks. We then recorded echocardiograms and performed right heart catheterizations. RESULTS Chronic hypoxia increased right ventricular systolic and diastolic pressures in wild-type mice but not Gpr75-/- or EC-Gpr75-/- mice. In situ hybridization and qPCR results revealed that Gpr75 expression was increased in the alveoli, airways and pulmonary arteries of mice exposed to hypoxia. In addition, levels of chemokine (CC motif) ligand 5 (CCL5), a low affinity ligand of GPR75, were increased in the lungs of wild-type, but not Gpr75-/-, mice exposed to hypoxia, and CCL5 enhanced hypoxia-induced contraction of intra-lobar pulmonary arteries in a GPR75-dependent manner. Gpr75 knockout also increased pulmonary cAMP levels and decreased contraction of intra-lobar pulmonary arteries evoked by endothelin-1 or U46619 in cAMP-protein kinase A-dependent manner. CONCLUSION These results suggest GPR75 has a significant role in the development of hypoxia-induced PH.
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Affiliation(s)
| | - Shun Matsumura
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | - Atsushi Kitagawa
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | - Gregg M Lainer
- Department of Cardiology, and Heart and Vascular Institute, Westchester Medical Center and New York Medical College, Valhalla, NY 10595, USA
| | - Frank Zhang
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | - Melinee D'silva
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | - Mohammad Y Khan
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | - Ghezal Froogh
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | - Artiom Gruzdev
- National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | - Darryl C Zeldin
- National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | | | - Sachin A Gupte
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA.
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D'Addario C, Kitagawa A, Matsumura S, Zhang F, Zeldin D, Gruzdev A, Schwartzman M, Gupte SA. Deletion Of G‐Protein‐Coupled Receptor 75 Prevents Hypoxia‐Induced Pulmonary Vasoconstriction and Hypertension. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r3813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Frank Zhang
- PharmacologyNew York Medical CollegeValhallaNY
| | - Darryl Zeldin
- National Institute of Environmental Health SciencesResearch Triangle ParkNC
| | - Artiom Gruzdev
- National Institute of Environmental Health SciencesDurhamNC
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Hatakeyama M, Yamamoto T, Yasuda K, Matsumura S, Yasunaga K, Sato K. In-situ Observation of Damage Structure in Cu-Cr-Zr and Cu-Cr Alloy During 1.25 MeV Electron Irradiation. Nuclear Materials and Energy 2022. [DOI: 10.1016/j.nme.2022.101144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yokoyama S, Fujita Y, Matsumura S, Yoshimura T, Kinoshita I, Watanabe T, Tabata H, Tsuji T, Ozawa S, Tamaki T, Nakatani Y, Oka M. Cribriform carcinoma in the lymph nodes is associated with distant metastasis, recurrence, and survival among patients with node-positive colorectal cancer. Br J Surg 2021; 108:e111-e112. [PMID: 33793704 DOI: 10.1093/bjs/znaa123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 11/15/2020] [Indexed: 11/13/2022]
Abstract
Cribriform lymph node pattern is an independent risk factor for metachronous or synchronous distant metastasis in patients with stage III and IV node-positive colorectal cancer. Multivariable analysis in patients with stage III disease indicated that the cribriform pattern of carcinoma in the lymph nodes was an independent risk factor for recurrence and survival. Kaplan–Meier analysis demonstrated that the group with stage III cribriform-type lymph node carcinoma had shorter recurrence-free and overall survival times than the stage III group with the tubular type (P < 0.001).
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Affiliation(s)
- S Yokoyama
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - Y Fujita
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - S Matsumura
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - T Yoshimura
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - I Kinoshita
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - T Watanabe
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - H Tabata
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - T Tsuji
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - S Ozawa
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - T Tamaki
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - Y Nakatani
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
| | - M Oka
- Department of Surgery, National Hospital Organization Minami Wakayama Medical Centre, Wakayama, Japan
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Matsumura S, Masutani S, Oshima A, Kanai M, Namba F, Ishiguro A, Kabe K. Is ibuprofen superior to indomethacin for patent ductus arteriosus in Japanese preterm infants? Pediatr Int 2021; 63:929-934. [PMID: 33274573 DOI: 10.1111/ped.14566] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 10/16/2020] [Accepted: 11/25/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND Many clinical trials have indicated that ibuprofen (IBU) has similar effects to indomethacin (IND) on the closure of patent ductus arteriosus (PDA) with fewer adverse effects. Owing to the scarce evidence on IBU use in Japan because of its recent approval we performed this observational study to compare the efficacy and safety of IBU with the efficiency and safety of IND. METHODS We included infants (gestational age < 30 weeks) with hemodynamically significant PDA under a prophylactic IND protocol for intraventricular hemorrhage who were treated with either IND (n = 30) or IBU (n = 30). We compared a PDA closing effect, changes in ultrasonography findings, and adverse effects between the groups. RESULTS There was no significant difference in the rates of PDA closure in the first treatment course (IND vs IBU: 46.7% vs 50.0%, P = 0.796) and surgical closure (IND vs IBU: 20.0% vs 20.0%, P = 1.000) between the groups. Both groups showed significant oliguria (IND vs IBU: 30.0% vs 23.3%, P = 0.559) and increased serum creatinine levels after treatment. However, an increase in serum creatinine level by >0.3 mg/dL, a criterion for acute kidney injury, was less frequent in the IBU group (35.7%) compared with that in the IND group (84.2%, P = 0.004). There were no significant differences in echocardiographic changes and jaundice and hypoglycemia incidence rates between the groups. CONCLUSIONS Except for an increase in serum creatinine levels by >0.3 mg/dL, which was less frequent with IBU, IBU had similar efficacy and safety as IND for preterm PDA. Ibuprofen and IND should be cautiously administered.
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Affiliation(s)
- Shun Matsumura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Ayumi Oshima
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Masayo Kanai
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Fumihiko Namba
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Akio Ishiguro
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Kazuhiko Kabe
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
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Abe Y, Matsumura S. Ihe Relationship between Defoaming Power and Dynamic Surface Tension of Sodium Dodecylbenzene Sulfonate Solutions with Alcohols. TENSIDE SURFACT DET 2021. [DOI: 10.1515/tsd-1983-200503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Suzuki H, Ueda N, Matsumura S, Masui M, Tsutsumi C, Mori M, Okubo Y, Ishiguro K. 246P A survey of breast cancer patients’ attitudes toward the breast reconstruction based on breast implant associated-anaplastic large cell lymphoma (BIA-ALCL). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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8
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Iwamoto Y, Matsumura S, Ishido H, Senzaki H, Masutani S. Steroid-Refractory Protein-Losing Enteropathy with Gastrointestinal Bleeding in a Patient with Fontan Circulation. Int Heart J 2020; 61:851-855. [PMID: 32728004 DOI: 10.1536/ihj.20-038] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Protein-losing enteropathy (PLE) is one of the major complications after a Fontan operation. Some PLE patients suffer from concurrent gastrointestinal bleeding. An effective treatment regimen for such patients has not been established yet. Further, it remains unknown whether PLE and gastrointestinal bleeding coexist independently, or protein losing is associated with gastrointestinal bleeding. We report a 7-year-old steroid-refractory post-Fontan PLE case suggesting the latter pathogenesis together with a literature review.
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Affiliation(s)
- Yoichi Iwamoto
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University
| | - Shun Matsumura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University
| | - Hirotaka Ishido
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University
| | - Hideaki Senzaki
- Department of Pediatrics, The International University of Health and Welfare Narita Hospital
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University
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Matsumura S, Yana A, Kuwata S, Kurishima C, Saiki H, Iwamoto Y, Ishido H, Masutani S, Senzaki H. Prevalence of Short Stature and Growth Hormone Deficiency and Factors Associated With Short Stature After Fontan Surgery. Circ Rep 2020; 2:243-248. [PMID: 33693236 PMCID: PMC7921366 DOI: 10.1253/circrep.cr-20-0009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background:
Fontan circulation is characterized by many features commonly observed in heart failure that may affect physical growth regardless of pituitary gland dysfunction status. The aims of the present study were to investigate the prevalence of short stature and growth hormone deficiency (GHD) and determine the factors associated with short stature after Fontan surgery. Methods and Results:
On retrospective evaluation of 47 patients after Fontan surgery, a very high prevalence of short stature was observed (38.3%). In the short stature group, 5 patients were diagnosed with GHD (10.6% of patients after Fontan Surgery), which is much higher than the frequency of 1/10,000 in the general population. Central venous pressure (CVP) was significantly higher (14.6±4.5 vs. 12.2±1.9 mmHg, P<0.05) and the blood pressure and arterial oxygen saturation were significantly lower in the short stature group. Laboratory data also indicated volume retention and congestion in the short stature group. Mean change in stature from catheterization 1 year after Fontan surgery to the most recent visit was significantly lower in the short stature group (−1.1±1.1 SD vs. 0.0±0.8 SD, P<0.05) and significantly negatively correlated with CVP (r=−0.42, P<0.05). Conclusions:
Volume retention and congestion, the prominent features of Fontan circulation, affect physical growth partly due to pituitary gland dysfunction, highlighting the need for the screening for and treatment of this condition after Fontan surgery.
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Affiliation(s)
- Shun Matsumura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University Saitama Japan
| | - Akiko Yana
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University Saitama Japan
| | - Seiko Kuwata
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University Saitama Japan
| | - Clara Kurishima
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University Saitama Japan
| | - Hirofumi Saiki
- Department of Pediatrics, Kitasato University School of Medicine Sagamihara Japan
| | - Yoichi Iwamoto
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University Saitama Japan
| | - Hirotaka Ishido
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University Saitama Japan
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University Saitama Japan
| | - Hideaki Senzaki
- Department of Pediatrics, Kitasato University School of Medicine Sagamihara Japan
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10
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Ozawa J, Watanabe T, Ito M, Miyake F, Nagano N, Ogawa R, Matsumura S, Araki R, Tamura M, Namba F. Defining the reference range of regional cerebral tissue oxygen saturation using a new portable near-infrared spectroscopy device for term infants. Early Hum Dev 2020; 141:104941. [PMID: 31883487 DOI: 10.1016/j.earlhumdev.2019.104941] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 10/10/2019] [Revised: 12/14/2019] [Accepted: 12/15/2019] [Indexed: 11/17/2022]
Abstract
BACKGROUND The arterial oxygen saturation of infants requiring resuscitation can be monitored using a pulse oximeter. However, the device cannot provide information about cerebral oxygenation. Thus, we used a new portable near-infrared spectroscopy (NIRS) device that can monitor regional cerebral tissue oxygen saturation (crSO2) with a probe attached to the examiner's finger. AIM To identify the reference ranges for crSO2 within the first 10 min after birth in term infants who did not receive any medical intervention in the delivery room. RESULTS crSO2 in the left frontoparietal area of the forebrain was measured within the first 10 min of life in 127 healthy term infants. The median gestational age and birth weight were 37.6 weeks and 2742 g, respectively, and 85% of the infants were delivered via a scheduled cesarean section. The 3rd-97th percentile values for crSO2 ranged from 33.1% to 56.7% at 1 min, from 33.2% to 59.5% at 2 min, and from 38.7% to 66.6% at 5 min after birth. A median of 3.5 min was required to achieve a crSO2 > 50%. CONCLUSIONS This study showed the reference ranges for crSO2 measured with the new portable NIRS device within the first 10 min after birth in term infants.
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Affiliation(s)
- Junichi Ozawa
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Takaaki Watanabe
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Masato Ito
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Fuyu Miyake
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Nobuhiko Nagano
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Ryo Ogawa
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Shun Matsumura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan
| | - Ryuichiro Araki
- Community Health Science Center, Saitama Medical University, 38 Morohongo, Moroyama, Iruma, Saitama 350-0495, Japan.
| | - Masanori Tamura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan.
| | - Fumihiko Namba
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan.
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Oshima A, Matsumura S, Iwatani A, Morita M, Fujinuma S, Motojima Y, Tanaka K, Masutani S, Kabe K, Ueda K, Namba F. Safety and Feasibility of Intravenous Paracetamol for Patent Ductus Arteriosus in Indomethacin-/Ibuprofen-Resistant or -Contraindicated Preterm Infants: A Case Series. AJP Rep 2020; 10:e49-e53. [PMID: 32140292 PMCID: PMC7056395 DOI: 10.1055/s-0040-1702945] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 10/30/2019] [Indexed: 11/02/2022] Open
Abstract
Background Although indomethacin and ibuprofen are the standard treatments for hemodynamically significant patent ductus arteriosus (hsPDA), they are associated with renal impairment and gastrointestinal complications. Paracetamol for hsPDA closure does not provoke a peripheral vasoconstrictive effect and seems to have effects similar to those of indomethacin and ibuprofen. We have previously reported the safety of low-dose (7.5 mg/kg) intravenous paracetamol for preterm infants with hsPDA, who were indomethacin-resistant or -contraindicated but did not affect the need for surgical PDA ligation. However, reports considering the use of higher-dose (15 mg/kg) paracetamol for hsPDA have not been published in Japan. Cases In 16 premature infants in whom indomethacin or ibuprofen was contraindicated or ineffective, 15 mg/kg of paracetamol was intravenously administered every 6 hours for 3 days after obtaining parental consent. hsPDA closure or narrowing was observed in 14 infants (88%), with the need for surgical closure totally avoided in nine cases (56%). High plasma paracetamol levels were observed in three cases. No paracetamol-related side effects or adverse events were reported. Conclusion The intravenous administration of higher dose paracetamol was safe and feasible in premature infants with hsPDA. Future clinical trials to explore the optimized dose and timing of administration are needed.
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Affiliation(s)
- Ayumi Oshima
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Shun Matsumura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Ayaka Iwatani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Machiko Morita
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Sumie Fujinuma
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Yukiko Motojima
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Kosuke Tanaka
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Kazuhiko Kabe
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Keiko Ueda
- Regulatory Strategy Division, Clinical Research Support Center, The University of Tokyo Hospital, Tokyo, Japan
| | - Fumihiko Namba
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
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12
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Morita M, Tanaka K, Matsumura S, Tamura M, Namba F. Perinatal factors associated with bubbly/cystic appearance in bronchopulmonary dysplasia: a nationwide, population-based cohort study in Japan. J Matern Fetal Neonatal Med 2019; 34:1221-1226. [PMID: 31170848 DOI: 10.1080/14767058.2019.1628945] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND Bronchopulmonary dysplasia (BPD) remains one of the most serious morbidities associated with preterm birth. Previous study reported that bubbly/cystic appearance on chest X-rays in the neonatal period is the strongest determinant of impaired lung function at school age in BPD patients. AIMS To determine perinatal risk factors for bubbly/cystic appearance on chest X-rays in extremely premature infants with BPD exposed to histological chorioamnionitis histological chorioamnionitis (hCAM). STUDY DESIGN Multicenter retrospective cohort study. SUBJECTS We analyzed 1369 extremely premature infants with severe hCAM who were admitted to the neonatal intensive care units participating in the Neonatal Research Network, Japan (NRNJ) Neonatal research network Japan. OUTCOME MEASURES Perinatal characteristics were compared and logistic regression analysis was performed for multivariate risk factor assessment. RESULT Infants with bubbly/cystic appearance on chest X-rays underwent longer duration of invasive mechanical ventilation and required inhaled nitric oxide and home oxygen therapy more frequently. Low gestational age (odds ratio 1.244; 95% confidence interval 1.139-1.359) and preterm premature rupture of membranes (odds ratio 1.507; 95% confidence interval 1.200-1.893) were significant risk factors. CONCLUSION Low gestational age and preterm premature rupture of membranes were independent risk factors for bubbly/cystic appearance in extremely premature infants with BPD following exposure to severe hCAM.
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Affiliation(s)
- Machiko Morita
- Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - Kosuke Tanaka
- Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - Shun Matsumura
- Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - Masanori Tamura
- Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - Fumihiko Namba
- Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
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13
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Oka S, Kondo U, Oshima A, Matsumura S, Kanai M, Ishiguro A, Iwamoto Y, Ishido H, Omori I, Masutani S. Two Extremely Low Birth Weight Infants Who Survived Functional Pulmonary Atresia with Normal Intracardiac Anatomy. AJP Rep 2019; 9:e310-e314. [PMID: 31544011 PMCID: PMC6753005 DOI: 10.1055/s-0039-1697960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 06/07/2019] [Indexed: 11/01/2022] Open
Abstract
For the first time, we report about two extremely low birth weight infants who were born at 25 and 22 weeks' gestation and who survived functional pulmonary atresia (fPA) with normal intracardiac anatomy. A slow, reflected, and bimodal blood flow pattern in the pulmonary artery (both cases) and the presence of pulmonary regurgitation (1 case) were useful for diagnosing fPA. Timely use of lipo-prostaglandin E1 to maintain adequate pulmonary flow and reduce pulmonary arterial resistance and sodium bicarbonate to improve acidosis were effective treatments to attain forward flow. As optimal management is essential for the intact survival of extremely early preterm infants and the accurate diagnosis of fPA is difficult without the awareness of the disease entity, our cases underline the importance of recognizing that fPA can occur even in extremely low birth weight infants with normal intracardiac anatomy.
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Affiliation(s)
- Shuntaro Oka
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Utako Kondo
- Department of Neonatology, Tokyo Metropolitan Bokutoh Hospital, Tokyo, Japan
| | - Ayumi Oshima
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Shun Matsumura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Masayo Kanai
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Akio Ishiguro
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Yoichi Iwamoto
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Hirotaka Ishido
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Isaku Omori
- Department of Neonatology, Tokyo Metropolitan Bokutoh Hospital, Tokyo, Japan
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Saitama, Japan
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Saida K, Kamei K, Ogura M, Matsumura S, Kano Y, Sato M, Andoh A, Ishikura K. Azathioprine-induced Agranulocytosis and Severe Alopecia After Kidney Transplantation Associated With a NUDT15 Polymorphism: A Case Report. Transplant Proc 2018; 50:3925-3927. [PMID: 30577288 DOI: 10.1016/j.transproceed.2018.04.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 04/12/2018] [Indexed: 01/17/2023]
Abstract
BACKGROUND Azathioprine (AZA) is the drug recommended for the continuation of immunosuppressive treatment after renal transplant in women during pregnancy. CASE REPORT A 37-year-old Japanese female developed agranulocytosis and severe alopecia after initiation of AZA (50 mg), used as an alternative to mycophenolate mofetil (MMF, 1000 mg) therapy in anticipation of a planned pregnancy. Within 4 days of the initiation of AZA therapy, the patient developed a high fever, leucopenia, and cranial alopecia. Genetic testing revealed a homozygous polymorphism of NUDT15 (rs116855232, NM_018283.3:c.415C>T: p.Arg139Cys), which has previously been identified as a risk factor for AZA-related complications in patients with inflammatory bowel disease. CONCLUSION Genetic screening for NUDT15 could contribute to the prevention of serious adverse reactions to AZA and provide the opportunity for personalized medicine. Identification of a safe alternative to MMF during pregnancy after a renal transplant is a problem to be resolved in the future.
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Affiliation(s)
- K Saida
- Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan
| | - K Kamei
- Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan
| | - M Ogura
- Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan
| | - S Matsumura
- Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan
| | - Y Kano
- Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan
| | - M Sato
- Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan
| | - A Andoh
- Department of Medicine, Shiga University of Medical Science, Shiga, Japan
| | - K Ishikura
- Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan.
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Yoshioka S, Tsuruta K, Yamamoto T, Yasuda K, Matsumura S, Ishikawa N, Kobayashi E. X-ray absorption near edge structure and first-principles spectral investigations of cationic disorder in MgAl 2O 4 induced by swift heavy ions. Phys Chem Chem Phys 2018; 20:4962-4969. [PMID: 29387834 DOI: 10.1039/c7cp07591j] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cationic disorder in the MgAl2O4 spinel induced by swift heavy ions was investigated using the X-ray absorption near edge structure. With changes in the irradiation fluences of 200 MeV Xe ions, the Mg K-edge and Al K-edge spectra were synchronously changed. The calculated spectra based on density function theory indicate that the change in the experimental spectra was due to cationic disorder between Mg in tetrahedral sites and Al in octahedral sites. These results suggest a high inversion degree to an extent that the completely random configuration is achieved in MgAl2O4 induced by the high density electronic excitation under swift heavy ion irradiation.
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Affiliation(s)
- S Yoshioka
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka, 819-0395, Japan.
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16
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Murakami T, Matsumura S. Reversible myelopathy with vitamin B12 deficiency after cerebral infarction-like lesions. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Matsumura S, Oshima A, Fujinuma S, Tanaka K, Nagano N, Miyake F, Masutani S, Tamura M, Ueda K, Namba F. Low-Dose Intravenous Paracetamol for Patent Ductus Arteriosus in Indomethacin-Resistant or Contraindicated Preterm Infants: Three Cases Reports. AJP Rep 2017; 7:e230-e233. [PMID: 29276647 PMCID: PMC5740229 DOI: 10.1055/s-0037-1615260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 10/26/2017] [Indexed: 11/21/2022] Open
Abstract
Background Although indomethacin (IND) is the standard treatment for hemodynamically significant patent ductus arteriosus (hsPDA) in Japan, it may be associated with renal impairment and gastrointestinal complications. The use of paracetamol for hsPDA closure has recently increased. Unlike IND, paracetamol does not have a peripheral vasoconstrictive effect and can be given to infants with contraindications to IND. Based on limited data available from randomized trials, paracetamol and IND seem to have similar effects. However, there have been no reports of the use of paracetamol for hsPDA in Japan. Cases Our drug administration protocol was approved by the institutional ethics committee after purchasing a clinical trial insurance. In three premature infants in whom IND was contraindicated or ineffective, a 7.5 mg/kg of paracetamol was intravenously administered every 6 hour for 3 days after obtaining parental consents. A temporary hsPDA closure was observed in two of the three infants. However, all three infants eventually needed surgical closure. No side effects, such as hepatic and renal dysfunctions, and adverse events were reported. Conclusion The intravenous administration of paracetamol was safe and feasible in premature infants with hsPDA. Future clinical trials with optimized dose and timing of administration are needed.
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Affiliation(s)
- Shun Matsumura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Ayumi Oshima
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Sumie Fujinuma
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Kosuke Tanaka
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Nobuhiko Nagano
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Fuyu Miyake
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Satoshi Masutani
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Masanori Tamura
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Keiko Ueda
- Clinical Research Support Center, The University of Tokyo Hospital, Bunkyo, Tokyo, Japan
| | - Fumihiko Namba
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
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18
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Matsumura S, Quispe-Salcedo A, Schiller CM, Shin JS, Locke BM, Yakar S, Shimizu E. IGF-1 Mediates EphrinB1 Activation in Regulating Tertiary Dentin Formation. J Dent Res 2017; 96:1153-1161. [PMID: 28489485 DOI: 10.1177/0022034517708572] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 11/16/2022] Open
Abstract
Eph receptors belong to a subfamily of receptor tyrosine kinases that are activated by membrane-spanning ligands called ephrins. Previously, we demonstrated that the ephrinB1-EphB2 interaction regulates odontogenic/osteogenic differentiation from dental pulp cells (DPCs) in vitro. The goal of this study was to identify the molecular mechanisms regulated by the EphB2/ephrinB1 system that govern tertiary dentin formation in vitro and in vivo. During tooth development, ephrinB1, and EphB2 were expressed in preodontoblast and odontoblasts at postnatal day 4. EphrinB1 was continuously expressed in odontoblasts and odontoblastic processes until the completion of tooth eruption. In addition, ephrinB1 was expressed in odontoblastic processes 2 wk following tooth injury without pulp exposure, whereas EphB2 was expressed in the center of pulp niches but not odontoblasts. In a model of tooth injury with pulp exposure, ephrinB1 was strongly expressed in odontoblasts 4 wk postinjury. In vitro studies with human and mouse DPCs treated with calcium hydroxide (CH) or mineral trioxide aggregate (MTA) showed an increased expression of insulin-like growth factor 1 (IGF-1). Experiments using several inhibitors of IGF-1 receptor signaling revealed that inhibiting the Ras/Raf-1/MAPK pathway inhibited EphB2 expression, and inhibiting the PI3K/Akt/mTOR pathway specifically inhibited ephrinB1 gene expression. Tooth injury in mice with odontoblast-specific IGF-1 receptor ablation exhibited a reduced tertiary dentin volume, mineral density, and ephrinB1 expression 4 wk following injury. We conclude that the IGF-1/ephrinB1 axis plays significant roles in the early stages of tooth injury. Further research is needed to fully understand the potential of targeting ephrinB1 as a regenerative pulp therapy.
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Affiliation(s)
- S Matsumura
- 1 Department of Oral and Maxillofacial Radiology, University of Connecticut Health Center, School of Dental Medicine, Farmington, Connecticut, USA
| | - A Quispe-Salcedo
- 2 Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA
| | - C M Schiller
- 2 Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA
| | - J S Shin
- 2 Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA
| | - B M Locke
- 2 Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA
| | - S Yakar
- 2 Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA
| | - E Shimizu
- 2 Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA.,3 Oral Biology Department, Rutgers School of Dental Medicine, Newark, New Jersey, USA
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Ojima T, Nakamori M, Nakamura M, Katsuda M, Hayata K, Matsumura S, Iwahashi M, Yamaue H. Phase I/II study of divided-dose docetaxel, cisplatin and fluorouracil for patients with recurrent or metastatic squamous cell carcinoma of the esophagus. Dis Esophagus 2017; 30:1-7. [PMID: 26725778 DOI: 10.1111/dote.12450] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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] [Indexed: 12/11/2022]
Abstract
Squamous cell carcinoma of the esophagus (SCCE) has a poor prognosis compared with other gastrointestinal cancers. Many patients present with locoregional unresectable or metastatic disease at the time of diagnosis. For these patients with metastatic esophageal cancer, chemotherapy is generally indicated. The aim of this phase I/II study was to evaluate the efficacy and safety of the combined use of docetaxel, cisplatin (CDDP) and 5-fluorouracil (5-FU)(DCF) in patients with recurrent/metastatic SCCE. This study adopted divided doses of docetaxel and CDDP in order to reduce the toxicities of the treatment. The dose of docetaxel was escalated using the following protocol in the phase I stage: level 1, 30 mg/m2; level 2, 35 mg/m2 and level 3, 40 mg/m2, which was intravenously infused for 2 hours on days 1 and 8. CDDP was administered at a dose of 12 mg/m2 infused for 4 hours on days 1-5. The 5-FU was administered at a dose of 600 mg/m2 continuously infused from day 1 to 5. This regimen was repeated every 4 weeks. The study subjects were nine patients (phase I) and 48 patients (phase II). The recommended dose was determined as level 3 in phase I. In the phase II stage, the overall response rate was 62.5%, with a complete response rate of 12.5%. The median progression-free survival was 6 months, and the median overall survival was 13 months. Grade 3/4 toxicities of leukopenia, neutropenia and febrile neutropenia occurred in 64.6%, 68.8% and 14.6% of the patients, while grade 3/4 non-hematological toxicities were relatively rare. No treatment-related death was recorded. This modified DCF regimen with divided doses can be a tolerable and useful regimen of definitive chemotherapy for unresectable SCCE because of its high efficacy, although adequate care for severe neutropenia must be administered.
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Affiliation(s)
- T Ojima
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - M Nakamori
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - M Nakamura
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - M Katsuda
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - K Hayata
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - S Matsumura
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - M Iwahashi
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - H Yamaue
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama, Japan
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20
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Takaki S, Yasuda K, Yamamoto T, Matsumura S, Ishikawa N. Structure of ion tracks in ceria irradiated with high energy xenon ions. Progress in Nuclear Energy 2016. [DOI: 10.1016/j.pnucene.2016.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Uno K, Nishizawa D, Seo S, Takayama K, Matsumura S, Sakai N, Ohi K, Nabeshima T, Hashimoto R, Ozaki N, Hasegawa J, Sato N, Tanioka F, Sugimura H, Fukuda KI, Higuchi S, Ujike H, Inada T, Iwata N, Sora I, Iyo M, Kondo N, Won MJ, Naruse N, Uehara-Aoyama K, Itokawa M, Yamada M, Ikeda K, Miyamoto Y, Nitta A. The Piccolo Intronic Single Nucleotide Polymorphism rs13438494 Regulates Dopamine and Serotonin Uptake and Shows Associations with Dependence-Like Behavior in Genomic Association Study. Curr Mol Med 2016; 15:265-74. [PMID: 25817861 DOI: 10.2174/1566524015666150330145722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 02/27/2015] [Accepted: 03/24/2015] [Indexed: 11/22/2022]
Abstract
Piccolo (PCLO) inhibits methamphetamine-induced neuropharmacological effects via modulation of dopamine (DA) uptake and regulation of the transport of synaptic vesicles in neuronal cells. Clinical studies have recently suggested that the single nucleotide polymorphism (SNP) rs13438494 in the intron 24 of the PCLO gene is associated with psychiatric disorder, in the meta-analysis of GWAS. Therefore, in this study, we attempted to evaluate the possible role of the PCLO SNP in the mechanisms of uptake of monoamines. To characterize rs13438494 in the PCLO gene, we constructed plasmids carrying either the C or A allele of the SNP and transiently transfected them into SH-SY5Y cells to analyze genetic effects on the splicing of PCLO mRNA. The C and A allele constructs produced different composition of the transcripts, indicating that the intronic SNP does affect the splicing pattern. We also transfected DA and serotonin (5-hydroxytryptamine; 5- HT) transporters into cells and analyzed their uptakes to elucidate the association to psychiatric disorders. In the cells transfected with the C allele, both the DA and 5-HT uptake were enhanced compared to the A allele. We also conducted a clinical study, in order to clarify the genetic associations. PCLO rs13438494 exhibits a relationship with the symptoms of drug dependence or related parameters, such as the age of first exposure to methamphetamine, eating disorders, tobacco dependence and fentanyl requirement. Our findings suggest that rs13438494 is associated with drug abuse and contributes to the pathogenesis of psychiatric disorders via modulation of neurotransmitter turnover.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - A Nitta
- Department of Pharmaceutical Therapy and Neuropharmacology, Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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22
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Matsumura S, Higa K, Igarashi T, Takaichi S, Tonogi M, Shinozaki N, Shimazaki J, Yamane GY. Characterization of mesenchymal progenitor cell populations from non-epithelial oral mucosa. Oral Dis 2014; 21:361-72. [PMID: 25180458 DOI: 10.1111/odi.12288] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 12/27/2013] [Accepted: 08/26/2014] [Indexed: 12/22/2022]
Abstract
OBJECTIVES The characteristics of cell populations extracted from oral mucosal non-epithelial tissues and their ability to differentiate were evaluated in vitro as a potential source of cells for mandibular and corneal regeneration. MATERIALS AND METHODS Oral mucosal non-epithelial cells (OMNECs) were extracted from tissue samples and were studied by flow cytometry and RT-PCR. Cells differentiating into osteoblasts, adipocytes, chondrocytes, neurocytes, or keratocytes were characterized by RT-PCR and cell staining. RESULTS OMNECs expressed CD44, CD90, CD105, CD166, and STRO-1 antigens, which are markers for mesenchymal stem cells. In addition, Oct3/4, c-Myc, Nanog, KLF4, and Rex, which are expressed by embryonic or pluripotent stem cells, were detected by RT-PCR. Expression of CD49d, CD56, and PDGFRα, proteins closely associated with the neural crest, was observed in OMNECs, as was expression of Twist1, Sox9, Snail1 and Snail2, which are early neural crest and neural markers. Specific differentiation markers were expressed in OMNECs after differentiation into osteoblasts, adipocytes, chondrocytes, or keratocytes. CONCLUSIONS Populations of OMNECs may contain both mesenchymal stem cells and neural crest origin cells and are a potential cell source for autologous regeneration of mandibular or corneal stroma.
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Affiliation(s)
- S Matsumura
- Department of Oral Medicine, Oral and Maxillofacial Surgery, Tokyo Dental College, Chiba, Japan
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23
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Ochiai T, Shioya A, Honma H, Saitoh Y, Matsumura S, Ban D, Irie T, Kudo A, Nakamura N, Fujikawa T, Itai A, Tanaka S, Arii S, Yamaoka S, Tanabe M. Combination Treatment of IκB Kinase β Inhibitor IMD-0354 and Gemcitabine Suppresses Oncogenic Proliferation of Pancreatic Cancer Cells. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.157] [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: 10/25/2022]
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24
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Timpel M, Wanderka N, Schlesiger R, Yamamoto T, Isheim D, Schmitz G, Matsumura S, Banhart J. Sr-Al-Si co-segregated regions in eutectic Si phase of Sr-modified Al-10Si alloy. Ultramicroscopy 2013; 132:216-21. [PMID: 23298536 DOI: 10.1016/j.ultramic.2012.10.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 09/30/2012] [Accepted: 10/20/2012] [Indexed: 11/16/2022]
Abstract
The addition of 200 ppm strontium to an Al-10 wt% Si casting alloy changes the morphology of the eutectic silicon phase from coarse plate-like to fine fibrous networks. In order to clarify this modification mechanism the location of Sr within the eutectic Si phase has been investigated by a combination of high-resolution methods. Whereas three-dimensional atom probe tomography allows us to visualise the distribution of Sr on the atomic scale and to analyse its local enrichment, transmission electron microscopy yields information about the crystallographic nature of segregated regions. Segregations with two kinds of morphologies were found at the intersections of Si twin lamellae: Sr-Al-Si co-segregations of rod-like morphology and Al-rich regions of spherical morphology. Both are responsible for the formation of a high density of multiple twins and promote the anisotropic growth of the eutectic Si phase in specific crystallographic directions during solidification. The experimental findings are related to the previously postulated mechanism of "impurity induced twinning".
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Affiliation(s)
- M Timpel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany.
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Kojio K, Furukawa M, Matsumura S, Motokucho S, Osajima T, Yoshinaga K. The effect of cross-linking density and dangling chains on surface molecular mobility of network polyurethanes. Polym Chem 2012. [DOI: 10.1039/c2py20149f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Fukushima K, Tsukimori K, Li D, Takao T, Morokuma S, Kato K, Seki H, Takeda S, Matsumura S, Wake N. Effect of transient TCDD exposure on immortalized human trophoblast-derived cell lines. Hum Exp Toxicol 2011; 31:550-6. [PMID: 22027506 DOI: 10.1177/0960327111424305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Low level, antenatal exposure to dioxins is associated with low birth weight, which in turn is associated with long-term sequelae. We exposed the human extravillous cytotrophoblast (EVT) lines HTR-8/SV40 and TCL1 to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and assessed cell growth, invasion, and differentiation. TCDD had no effect on cell proliferation, invasion, or tube formation in Matrigel. The EVT-derived cells expressed a functional aryl hydrocarbon receptor protein; however, TCDD exposure did not alter expression levels of proteins involved in EVT differentiation in early pregnancy, including hypoxia-inducible factor 1A (HIF1A), vascular endothelial growth factor (VEGF), Integrin A1, A6, and AVB3. These results suggest that the reduction in fetal weight induced by dioxin is not the result of vascular remodeling via EVT dysfunction.
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Affiliation(s)
- K Fukushima
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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27
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Matsumura S, Sakurai K, Shinomiya T, Fujitani N, Key K, Ohashi M. Biochemical and immunohistochemical characterization of the isoforms of myosin and actin in human placenta. Placenta 2011; 32:347-55. [PMID: 21420731 DOI: 10.1016/j.placenta.2011.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 02/24/2011] [Accepted: 02/24/2011] [Indexed: 11/29/2022]
Abstract
Human placenta has long been known to contain large quantities of smooth muscle-type myosin and actin, while precise isoform compositions of its contractile proteins are not known. To determine the isoform compositions, myosin and actin were extracted from human term placentas and subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis and Western blotting by using isoform-specific monoclonal anti-myosin and anti-actin antibodies. The placental myosin was found to be composed of about 65% of a nonmuscle-type heavy chain isoform (MIIA), each about 15% of two smooth muscle-type heavy chain isoforms (SM1 and SM2) and about 5% of a brain/fetus-type heavy chain isoform (MIIB2). Whereas the MIIA isoform was present in both vascular and extravascular tissues, the SM1 isoform was localized almost only in the vascular tissue. Similarly, human term placenta was found to contain approximately 60, 30, and 10% of β-nonmuscle, α-smooth muscle, γ-smooth muscle actin isoforms, respectively. The β-nonmuscle actin was located primarily in the extravascular tissue, while the α-smooth muscle actin was located mostly in the vascular tissue. The extravascular tissue of the human term placenta thus appears to be composed of almost only nonmuscle-type isoforms of contractile proteins. The vascular tissue appears to be composed of both smooth muscle-type and nonmuscle-type isoforms of contractile proteins.
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Affiliation(s)
- S Matsumura
- Department of Biophysics, Kobe University Graduate School of Health Sciences, Suma, Japan.
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Matsumura S, Soeda T, Zaluzec NJ, Kinoshita C. Electron Channeling X-ray Microanalysis for Cation Configuration in Irradiated Magnesium Aluminate Spinel. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-589-129] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractHigh angular resolution electron channeling x-ray spectroscopy (HARECXS) was examined as a practical tool to locate lattice-ions in spinel crystals. The orientation dependent intensity distribution of emitted x-rays obtained by HARECXS is so sensitive to lattice-ion configuration in the illuminated areas that the occupation probabilities on specific positions in the crystal lattice can be determined accurately through comparison with the theoretical rocking curves. HARECXS measurements have revealed partially disordered cation arrangement in MgO·nAl2O3 with n= 1.0 and 2.4. Most A13+ lattice-ions occupy the octahedral (VI) sites with 6-fold coordination, while Mg2+ lattice-ions reside on both the tetrahedral (IV) and the octahedral (VI) sites. The structural vacancies are enriched in the IV-sites. Further evacuation of cations from the IV-sites to the VI-sites is recognized in a disordering process induced by irradiation with 1 MeV Ne+ ions up to 8.9 dpa at 870 K.
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Matsumura S, Takagi K, Okuda-Ashitaka E, Lu J, Naritsuka H, Yamaguchi M, Ito S. Characterization of nestin expression in the spinal cord of GFP transgenic mice after peripheral nerve injury. Neuroscience 2010; 170:942-53. [PMID: 20673789 DOI: 10.1016/j.neuroscience.2010.07.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 07/15/2010] [Accepted: 07/15/2010] [Indexed: 12/14/2022]
Abstract
Many studies have shown that activation and increase in the number of astrocytes and microglia in the spinal cord participate in the initiation and maintenance of neuropathic pain, but little attention has been paid to the responses of neural progenitor cells to peripheral nerve injury. Nestin, a class VI intermediate filament protein, is expressed both in neuronal and glial progenitors as well as in their common precursors; and nestin-positive cells appear in the brain and spinal cord following various forms of damage to these regions. To clarify the responses of neural progenitor cells to nerve injury, we applied L5 spinal nerve transection (L5-SNT) to nestin-promoter GFP (pNestin-GFP) transgenic mice to narrow the target to them. While pNestin-GFP expression was strongly retained in the ependyma lining the central canal of the transgenic spinal cord even in adulthood, it was markedly reduced in the dorsal horn during postnatal development by day 7. Increases in pNestin-GFP expression and labeling by the proliferation marker 5-bromodeoxyuridine were broadly found in the dorsal horn of adult mice on day 3 after L5-SNT. On the other hand, the activation and increase in number of microglia and astrocytes are restricted to the superficial layer of the dorsal horn, the central terminal of injured primary afferent fibers. Purinergic P2X agonist α, β-MeATP increased [Ca(2+)]i in nestin-positive cells in the superficial layer ipsilateral to nerve injury and P2 receptor antagonists suramin and pyridoxalphosphate-6-azophenyl-2,4-disulphonic acid (PPADS) blocked the expression and elongation of pNestin-GFP fibers in the slice culture of the spinal cord. These results with pNestin-GFP transgenic mice demonstrate that nestin-positive cells proliferate in the dorsal horn in response to peripheral nerve injury and suggest that ATP may contribute to the expression of nestin and activation of neural progenitor cells after nerve injury.
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Affiliation(s)
- S Matsumura
- Department of Medical Chemistry, Kansai Medical University, Moriguchi, Osaka 570-8506, Japan
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Bramanti B, Thomas MG, Haak W, Unterlaender M, Jores P, Tambets K, Antanaitis-Jacobs I, Haidle MN, Jankauskas R, Kind CJ, Lueth F, Terberger T, Hiller J, Matsumura S, Forster P, Burger J. Genetic discontinuity between local hunter-gatherers and central Europe's first farmers. Science 2009; 326:137-40. [PMID: 19729620 DOI: 10.1126/science.1176869] [Citation(s) in RCA: 372] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
After the domestication of animals and crops in the Near East some 11,000 years ago, farming had reached much of central Europe by 7500 years before the present. The extent to which these early European farmers were immigrants or descendants of resident hunter-gatherers who had adopted farming has been widely debated. We compared new mitochondrial DNA (mtDNA) sequences from late European hunter-gatherer skeletons with those from early farmers and from modern Europeans. We find large genetic differences between all three groups that cannot be explained by population continuity alone. Most (82%) of the ancient hunter-gatherers share mtDNA types that are relatively rare in central Europeans today. Together, these analyses provide persuasive evidence that the first farmers were not the descendants of local hunter-gatherers but immigrated into central Europe at the onset of the Neolithic.
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Affiliation(s)
- B Bramanti
- Institute for Anthropology, University of Mainz, Mainz, Germany.
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31
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Oguma R, Matsumura S, Eguchi T. Kinetics of B2- and D0(3)-type ordering and formation of domain structures in Fe-Al alloys. J Phys Condens Matter 2008; 20:275225. [PMID: 21694386 DOI: 10.1088/0953-8984/20/27/275225] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Time-dependent Ginzburg-Landau (TDGL) formulation has been developed for the ordering processes of B2 and D0(3) types in binary alloy systems. In the formulation, three order parameters are defined in order to describe the state of order. Equivalent variants of B2 and D0(3) structures are distinguished using these order parameters. The mean-field free energy is defined in the form of a Landau-type expansion using the order parameters and a composition parameter. Interface energies due to local variations in the degrees of order and concentration are given with a gradient square approximation. Kinetic equations are derived from the Ginzburg-Landau-type potential in order to describe the time-evolutions of the order parameters and the concentration. Numerical simulations of the kinetic equations have been performed for B2- and D0(3)-type ordering as well as concurrent ordering and phase separation to disordered A2+D0(3). The simulated results provide a good reproduction of the formation processes of B2 and D0(3) ordered domains in an Fe(3)Al alloy.
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Affiliation(s)
- R Oguma
- Department of Applied Physics, Fukuoka University, Nanakuma 8-19-1, Jonanku, Fukuoka 814-0180, Japan
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32
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Takagi K, Okuda-Ashitaka E, Mabuchi T, Katano T, Ohnishi T, Matsumura S, Ohnaka M, Kaneko S, Abe T, Hirata T, Fujiwara S, Minami T, Ito S. Involvement of stem cell factor and its receptor tyrosine kinase c-kit in pain regulation. Neuroscience 2008; 153:1278-88. [PMID: 18423881 DOI: 10.1016/j.neuroscience.2008.02.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2007] [Revised: 02/21/2008] [Accepted: 02/29/2008] [Indexed: 12/11/2022]
Abstract
The c-kit receptor tyrosine kinase is expressed in a subpopulation of small- and medium-sized neurons of the dorsal root ganglia (DRG) and in the superficial layer of the spinal cord. Stem cell factor (SCF), a ligand of the c-kit receptor, induces neurite outgrowth from DRG and supports the survival of c-kit-expressing neurons. To clarify the possible function of the SCF/c-kit receptor system in the adult animal, we investigated the expression of c-kit receptor in the spinal cord and DRG in relation to pain by using H2C7, a newly developed anti-c-kit monoclonal antibody. S.c. and intrathecal injection of SCF markedly reduced the paw withdrawal threshold to mechanical stimuli and intrathecal SCF at 10 pg maximally induced mechanical allodynia in conscious mice. Intrathecal SCF also reduced the paw withdrawal latency to heat stimuli significantly but transiently. The c-kit receptor was co-expressed in 58.4% of calcitonin gene-related peptide (CGRP) -positive, but only 5.1% of isolectin B4-positive, DRG neurons. In the spinal cord, the c-kit receptor was detected in the superficial layer of the dorsal horn and co-localized there with CGRP in central terminals of DRG neurons. Selective elimination of unmyelinated C-fibers by neonatal capsaicin treatment resulted in marked reduction of the c-kit receptor and CGRP expression in the superficial layer of the spinal cord. Cell-size profiles showed that c-kit receptor expression was significantly up-regulated and down-regulated in medium-sized DRG neurons after neonatal capsaicin treatment and nerve injury, respectively. These results suggest that the c-kit receptor is mainly expressed in peptidergic small-sized DRG neurons and may be involved in pain regulation both peripherally and centrally.
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Affiliation(s)
- K Takagi
- Department of Medical Chemistry, Kansai Medical University, 10-15 Fumizono, Moriguchi, Japan
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Ishii J, Tanaka T, Matsumura S, Tatematsu K, Kuroda S, Ogino C, Fukuda H, Kondo A. Yeast-Based Fluorescence Reporter Assay of G Protein-coupled Receptor Signalling for Flow Cytometric Screening: FAR1-Disruption Recovers Loss of Episomal Plasmid Caused by Signalling in Yeast. J Biochem 2008; 143:667-74. [DOI: 10.1093/jb/mvn018] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
A 1.25MV high-voltage electron microscope with a B-type omega filter has been successfully installed at Kyushu University. An image detection chamber has been set inside a concrete block below the ground level without changing the frame structure for anti-vibration. Nearly the same design as that for the 200kV microscope has been kept for the present omega filter except for its size. A new pre- and post-filter lens system with rotation-free imaging has been designed. Energy resolution, beam shape and stability of the filter have been measured. Some application data have been obtained to demonstrate the performance of the filter.
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Affiliation(s)
- K Omoto
- JEOL Ltd., Akishima, Tokyo 196-8558, Japan.
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Mitani Y, Oue N, Matsumura S, Yoshida K, Noguchi T, Ito M, Tanaka S, Kuniyasu H, Kamata N, Yasui W. Reg IV is a serum biomarker for gastric cancer patients and predicts response to 5-fluorouracil-based chemotherapy. Oncogene 2007; 26:4383-93. [PMID: 17237819 DOI: 10.1038/sj.onc.1210215] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [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: 12/13/2022]
Abstract
Regenerating gene family, member 4 (Reg IV), a secreted protein, is overexpressed in several cancers, including gastric cancer (GC). In the present study, we measured Reg IV levels in sera from patients with GC by enzyme-linked immunosorbent assay. We also examined the effect of forced Reg IV expression on the apoptotic susceptibility to 5-fluorouracil (5-FU). Forced expression of Reg IV inhibited 5-FU-induced apoptosis. Induction of Bcl-2 and dihydropyrimidine dehydrogenase was involved in inhibition of apoptosis. Among 36 GC patients treated with a combination chemotherapy of low-dose 5-FU and cisplatin, all 14 Reg IV-positive patients showed no change or disease progression. The serum Reg IV concentration was similar between healthy individuals (mean+/-s.e., 0.52+/-0.05 ng/ml) and patients with chronic-active gastritis (0.36+/-0.09 ng/ml). However, the serum Reg IV concentration in presurgical GC patients was significantly elevated (1.96+/-0.17 ng/ml), even at stage I. The diagnostic sensitivity of serum Reg IV (36.1%) was superior to that of serum carcinoembryonic antigen (11.5%) or carbohydrate antigen 19-9 (13.1%). These results indicate that expression of Reg IV is a marker for prediction of resistance to 5-FU-based chemotherapy in patients with GC. Serum Reg IV represents a novel biomarker for GC.
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Affiliation(s)
- Y Mitani
- Department of Molecular Pathology, Hiroshima University, Graduate School of Biomedical Sciences, Hiroshima, Japan
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36
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Matsumura S, Shibakusa T, Fujikawa T, Yamada H, Inoue K, Fushiki T. Increase in transforming growth factor-beta in the brain during infection is related to fever, not depression of spontaneous motor activity. Neuroscience 2006; 144:1133-40. [PMID: 17156928 DOI: 10.1016/j.neuroscience.2006.10.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2006] [Revised: 10/25/2006] [Accepted: 10/26/2006] [Indexed: 10/23/2022]
Abstract
When viral infection occurs, this information is transmitted to the brain, and symptoms such as fever and tiredness are induced. One of the causes of these symptoms is the secretion of proinflammatory cytokines in blood and the brain. In this study, the i.p. administration of polyinosinic:polycytidylic acid (poly I:C), a synthetic double-stranded RNA, to rats was used as an infection model. Poly I:C decreased spontaneous motor activity (SMA) 2 h after i.p. administration, and this decrease was maintained thereafter. The concentration of active transforming growth factor-beta (TGF-beta) in cerebrospinal fluid (CSF) increased 1 h after the administration. This increase occurred earlier than those in the concentrations of other proinflammatory cytokines, such as interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha), in serum. The intracisternal administration of an anti-TGF-beta antibody partially inhibited fever induced by poly I:C administration; however, this treatment did not affect the decrease in SMA. Furthermore, intracisternal administration of TGF-beta raised the body temperature. These results indicate that TGF-beta in the brain, which was increased by poly I:C administration, is associated with fever but not with a decrease in SMA.
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Affiliation(s)
- S Matsumura
- Laboratory of Nutrition Chemistry, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto, Japan 606-8502
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37
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Tatsumi S, Mabuchi T, Katano T, Matsumura S, Abe T, Hidaka H, Suzuki M, Sasaki Y, Minami T, Ito S. Involvement of Rho-kinase in inflammatory and neuropathic pain through phosphorylation of myristoylated alanine-rich C-kinase substrate (MARCKS). Neuroscience 2005; 131:491-8. [PMID: 15708490 DOI: 10.1016/j.neuroscience.2004.10.022] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2004] [Indexed: 11/18/2022]
Abstract
Myristoylated alanine-rich C-kinase substrate (MARCKS) is a major in vivo substrate for protein kinase C in the brain and has been implicated in cellular processes associated with cytoskeletal restructuring such as synaptic trafficking and neurotransmitter release. A phosphorylation-site specific antibody against Ser159-phospho-MARCKS (pS159-Mar-Ab) revealed that MARCKS is phosphorylated at Ser159 by Rho-kinase and that its phosphorylation is inhibited by the Rho-kinase specific inhibitor H-1152. Since the function of MARCKS is regulated by phosphorylation at multiple sites, here we examined the involvement of Rho-kinase in relation to phosphorylation of MARCKS at Ser159 in inflammatory and neuropathic pain by H-1152. When intrathecally administered 10 min before s.c. injection of formalin, H-1152 at 10 and 100 ng attenuated the second-phase, but not the first-phase, pain-like behaviors in the formalin test. Neuropathic pain induced by selective L5 spinal nerve transection was also relieved by intrathecal injection of H-1152. Nitric oxide synthase activity visualized by NADPH diaphorase histochemistry increased in the superficial layer of the spinal cord 30 min after formalin injection and 7 days after nerve transection, which were blocked by H-1152. Phosphorylation of MARCKS at Ser159 was detected in the spinal cord by pS159-Mar-Ab and the level of phosphorylation increased in the superficial layer after nerve transection. In contrast, immunoreactivities of neuronal nitric oxide synthase and MARCKS did not change significantly in the spinal cord before and after nerve transection. Taken together, the present study demonstrates that Rho-kinase is involved in inflammatory pain and the maintenance of neuropathic pain through phosphorylation of MARCKS at Ser159.
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Affiliation(s)
- S Tatsumi
- Department of Anesthesiology, Osaka Medical College, Takatsuki 569-8686, Japan
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Liao XZ, Zou J, Cockayne DJH, Matsumura S. [001] zone-axis bright-field diffraction contrast from coherent Ge(Si) islands on Si(001). Ultramicroscopy 2004; 98:239-47. [PMID: 15046804 DOI: 10.1016/j.ultramic.2003.08.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2003] [Revised: 07/08/2003] [Indexed: 10/27/2022]
Abstract
Coherent Ge(Si)/Si(001) quantum dot islands grown by solid source molecular beam epitaxy at a growth temperature of 700 degrees C were investigated using transmission electron microscopy working at 300kV. The [001] zone-axis bright-field diffraction contrast images of the islands show strong periodicity with the change of the TEM sample substrate thickness and the period is equal to the effective extinction distance of the transmitted beam. Simulated images based on finite element models of the displacement field and using multi-beam dynamical diffraction theory show a high degree of agreement. Studies for a range of electron energies show the power of the technique for investigating composition segregation in quantum dot islands.
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Affiliation(s)
- X Z Liao
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK
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Pacaud J, Zuo JM, Hoier R, Matsumura S. Quantitative electron diffraction evidence for one-dimensional ordering in magnetite above the Verwey transition. Microsc Microanal 2003; 9:475-483. [PMID: 19771703 DOI: 10.1017/s1431927603030393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Energy-filtered electron diffraction and three-dimensional reciprocal lattice mapping was used to study the nature of diffuse scattering in magnetite above the Verwey transition temperature. Characteristic Huang scattering associated with a single molecular polaron is observed at room temperature. As the temperature is lowered, the experiment shows narrowing of diffuse scattering in the (001) directions and additional ringlike diffuse scattering at q approximately 0.8, which suggests the presence of one-dimensional structures above the Verwey transition. Experimental measurements of temperature-dependent correlation lengths and diffuse scattering intensity indicate an increase in the number and length of the one-dimensional structure as the temperature is cooled toward the transition. This study demonstrates the electron sensitivity to atomic displacement and the quality of electron diffraction data for studying phase transition in complex materials.
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Affiliation(s)
- J Pacaud
- Lab. de Metallic Phys., UMR 6630, SP2MI, BP179, Université de Poitiers, 86960 Chasseneuil, France
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Maki M, Yamashiro T, Matsumura S. High levels of genetic diversity in island populations of the island endemic Suzukia luchuensis (Labiatae). Heredity (Edinb) 2003; 91:300-6. [PMID: 12939632 DOI: 10.1038/sj.hdy.6800311] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Genetic diversity and genetic differentiation within and among island populations was examined by allozyme electrophoresis in Suzukia luchuensis (Labiatae), which is endemic to four of the Ryukyu Islands, southern Japan, and one island near Taiwan. Intrapopulation allozyme diversity was very low in all the four Ryukyu Islands, probably due to the effects of random drift in small populations. In contrast, genetic diversity at the species level was high, possibly because of an ancient origin of populations and/or multiple colonization of the species on different islands. Genetic differentiation among the overall populations was high (G(ST)=0.863), while gene flow (Nm) as estimated from allozyme frequency data was 0.041, suggesting that its occurrence among populations is highly restricted. Hierarchical analysis of genetic differentiation indicated that a high proportion of the total allelic variance is attributed to variation among islands, corresponding to the fact that several alleles were fixed on only one island. However, intraisland genetic differentiation was small on all islands except Yonaguni Island, where S. luchuensis is relatively widely distributed. Most diversity was thus due to differences among islands.
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Affiliation(s)
- M Maki
- Division of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan.
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Suzuki Y, Taguchi S, Saito T, Toshima K, Matsumura S, Doi Y. Involvement of catalytic amino acid residues in enzyme-catalyzed polymerization for the synthesis of polyesters. Biomacromolecules 2003; 2:541-4. [PMID: 11749218 DOI: 10.1021/bm015508o] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recently, a variety of aliphatic polyesters have been synthesized using hydrolases such as lipases and PHB depolymerases, and the reaction mechanism for these enzyme-catalyzed polymerization has been discussed. In this paper, we have studied the involvement of the catalytic amino acid residues of the hydrolase in enzyme-catalyzed polymerization with an extracellular PHB depolymerase from Alcaligenes faecalis T1. A wild-type PHB depolymerase and three kinds of site-specific mutants (catalytic amino acids were substituted) were prepared and their polymerization activities for the ring-opening polymerization of (R)-beta-butyrolactone (BL) were compared. BL was polymerized at 80 degrees C in bulk by the wild-type enzyme to yield polymers consisting of cyclic and linear structures in a high monomer conversion. In contrast, none of the mutant enzymes showed obvious polymerization activity. These results have clearly demonstrated that the catalytic triad is indeed responsible for the enzyme-catalyzed polymerization of BL.
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Affiliation(s)
- Y Suzuki
- Polymer Chemistry Laboratory, RIKEN Institute, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
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Matsumura S, Soeda T, Shimada M, Zaluzec NJ. Electron channeling X-ray spectroscopic study of partially disordered magnesium-aluminate spinel. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302094400] [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: 11/11/2022] Open
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Okanobu H, Hata J, Haruma K, Matsumura S, Yoshida S, Kitadai Y, Tanaka S, Chayama K. Preoperative assessment of gastric cancer vascularity by flash echo imaging. Scand J Gastroenterol 2002; 37:608-12. [PMID: 12059065 DOI: 10.1080/00365520252903189] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [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: 02/04/2023]
Abstract
BACKGROUND Tumor vascularity as indicated by immunohistochemical staining is a significant prognostic factor in gastric and other cancers. Non-invasive preoperative assessment of the vascularity of gastric cancers has not been possible. We aim to determine the reliability of harmonic flash echo imaging (FEI) for assessment of vascularity of gastric cancers by comparison with CD34 staining of resected specimens. METHODS Twelve patients undergoing surgical resection of advanced gastric cancer were studied. An ultrasound system transmitting ultrasound pulses at 2.3 MHz and receiving them at 4.6 MHz (second harmonic image) was used for harmonic FEI. Approximately 30 s after intravenous injection of ultrasonic contrast medium (SHU 508A, Levovist), second harmonics (4.6 MHz) emitted from microbubbles were obtained to enhance the B-mode images. Using the tumor image showing strongest enhancement in each FEI series, regions of interest were determined to measure mean echo intensity in the tumor. Immunohistochemistry using antibodies against CD34 was carried out in resected specimens. Tumor vascularity was determined by counting stained microvessels. RESULTS A significant positive correlation was noted between sonographic amplitude determined preoperatively by FEI analysis and number of CD34-stained microvessels in tumor specimens (r = 0.869, P = 0.004). CONCLUSION Vascularity of gastric cancers now can be evaluated non-invasively by harmonic FEI.
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Affiliation(s)
- H Okanobu
- First Dept of Internal Medicine, Hiroshima University School of Medicine, Japan
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Tashiro H, Katabuchi H, Ohtake H, Yoshioka A, Matsumura S, Suenaga Y, Nagamura Y, Matsuura K, Okamura H. An immunohistochemical and ultrastructural study of a follicle-stimulating hormone-secreting gonadotroph adenoma occurring in a 10-year-old girl. Med Electron Microsc 2002; 33:25-31. [PMID: 11810454 DOI: 10.1007/s007950000004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2000] [Accepted: 06/01/2000] [Indexed: 10/27/2022]
Abstract
Female gonadotroph adenomas with endocrinological symptoms are uncommon. Six cases of such adenomas have been reported in the literature: two were girls who presented with precocious puberty and four were premenopausal women with accompanying multiple ovarian cysts. We describe here a 10-year-old Japanese girl with a gonadotroph macroadenoma and present detailed morphological findings of the tumor. The patient's chief complaints were nausea, abdominal distention, and abdominal pain. Abdominopelvic ultrasonography and magnetic resonance imaging (MRI) revealed bilateral multiple ovarian cysts. Endocrinological assays showed elevated serum follicle-stimulating hormone (FSH) (33.7 mIU/ml) and estradiol (3840 pg/ml). MRI of the head showed a large pituitary tumor. Two transsphenoidal operations and subsequent radiation therapy were performed. Immunohistochemically, more than half the tumor cells were positive for anti-FSH-beta monoclonal antibody. Ultrastructurally, the tumor cells exhibited a fairly uniform picture of rounded cells. Their nuclei were slightly irregular and contained heterochromatin, and their cytoplasm contained many round, dense core granules, measuring 140-260 nm in diameter, together with well-developed organelles. An in vitro study showed that the tumor cells in primary culture produced FSH (1089.0 mIU/ml). To our knowledge, this is the first immunohistochemical and ultrastructural study of an FSH-secreting gonadotroph adenoma occurring in childhood.
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Affiliation(s)
- H Tashiro
- Department of Obstetrics and Gynecology, Kumamoto University School of Medicine, 1-1-1 Honjo, Kumamoto 860-8556, Japan.
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Abstract
A 62-year-old female farmer presented with retinal detachment in her left eye, and an Angiostrongylus cantonensis worm was recovered by vitreous surgery. The case did not show typical clinical symptoms indicating meningitis, although the patient complained of a mild headache, a low-grade fever, and slight ataxia. The symptoms were treated as influenza before the onset of the retinal detachment. The present case is the first confirmed of ocular angiostrongyliasis in Japan.
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Affiliation(s)
- H Toma
- Department of Parasitology, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan.
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Toma H, Matsumura S, Oshiro C, Hidaka T, Sato Y. Ocular Angiostrongyliasis without Meningitis Symptoms in Okinawa, Japan. J Parasitol 2002. [DOI: 10.2307/3285423] [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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Abstract
The enzymatic degradation and polymerization using an enzyme were carried out with respect to the establishment of a sustainable chemical recycling system for poly(epsilon-caprolactone) (PCL) which is a typical biodegradable synthetic plastic. The enzymatic transformation of PCL having an Mn of 110,000 using Candida antarctica lipase (lipase CA) in water-containing toluene at 40 degrees C afforded the corresponding cyclic dicaprolactone (DCL, 1,8-dioxacyclotetradecane-2,9-dione) in a yield of up to 97%. Thus the obtained DCL readily polymerized again using both the fresh and recovered lipase CAs.
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Affiliation(s)
- H Ebata
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Nakano T, Wada Y, Matsumura S. Membrane lipid components associated with increased filterability of erythrocytes from long-distance runners. Clin Hemorheol Microcirc 2001; 24:85-92. [PMID: 11381183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Deformability of red blood cells and the lipid composition of their plasma membranes were studied in ten long-distance runners, in comparison with ten sedentary matched controls. Mean corpuscular volume and corpuscular hemoglobin concentration did not differ between these groups, while the hemoglobin concentration and hematocrit were lower in the former. Deformability was measured in terms of the erythrocyte suspension filterability through 5 microm microchannels, using an array flow analyzer, and was significantly elevated in athletes. Analysis of the membrane phospholipid composition of red blood cells revealed an increased ratio of phosphatidylcholine to phosphatidylethanolamine and a decreased ratio of cholesterol to total phospholipids in athletes. The length and saturation levels of fatty acid acyl chains were unchanged. Multiple regression analysis showed clearly that these alterations of membrane lipids correlate with increased deformability and thus favor circulation in the microvasculature in long-distance runners.
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Affiliation(s)
- T Nakano
- Osaka University of Health and Sport Sciences, 1558-1 Noda, Kumatori-cho, Sennan-gun, Osaka 590-0496, Japan
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Okamoto R, Yamamoto K, Yabushita K, Okano N, Shimada N, Matsumura S, Mizuno M, Higashi T, Tsuji T. T cell repertoire in primary biliary cirrhosis: a common T cell clone and repertoire change after treatment. J Clin Immunol 2001; 21:278-85. [PMID: 11506198 DOI: 10.1023/a:1010983325927] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
T cell repertoire was analyzed in three early-stage primary biliary cirrhosis (PBC) patients, using reverse transcription-polymerase chain reaction and single-strand conformation polymorphism. Multiple expanded clones were demonstrated in livers and peripheral blood lymphocytes (PBL) of all three patients. Comparison of the repertoire of different parts of the liver demonstrated the presence of common clones in various Vbeta families. Comparison of the repertoire between the liver and PBL demonstrated that both CD4 and CD8 T cell clones were expanded. Sequence analysis of complementarity determining region 3 of the expanded clones revealed that relatively conserved amino acids were utilized in each patient and that an identical CD4 T cell clone having Vbeta16 was present in all three patients. The number of expanded T cell clones in PBL decreased markedly after the treatment with prednisolone. These results suggest that common T cell clones may play a pathogenic role in PBC.
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Affiliation(s)
- R Okamoto
- First Department of Internal Medicine, Okayama University Medical School, Japan
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Matsumura S, Yamamoto K, Shimada N, Okano N, Okamoto R, Suzuki T, Hakoda T, Mizuno M, Higashi T, Tsuji T. High frequency of circulating HBcAg-specific CD8 T cells in hepatitis B infection: a flow cytometric analysis. Clin Exp Immunol 2001; 124:435-44. [PMID: 11472405 PMCID: PMC1906072 DOI: 10.1046/j.1365-2249.2001.01561.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Viral antigen-specific T cells are important for virus elimination. We studied the hepatitis B virus (HBV)-specific T cell response using flow cytometry. Three phases of HBV infection were studied: Group A, HBeAg (+) chronic hepatitis; Group B, HBeAb (+) HBV carrier after seroconversion; and Group C, HBsAb (+) phase. Peripheral T cells were incubated with recombinant HB core antigen (HBcAg), and intracytoplasmic cytokines were analysed by flow cytometry. HBcAg-specific CD4 and CD8 T cells were identified in all three groups and the number of IFN-gamma-positive T cells was greater than TNF-alpha-positive T cells. The frequency of IFN-gamma-positive CD4 and CD8 T cells was highest in Group C, compared with Groups A and B. No significant difference in the HBcAg-specific T cell response was observed between Group A and Group B. The HBcAg-specific CD8 T cell response was diminished by CD4 depletion, addition of antibody against human leucocyte antigen (HLA) class I, class II or CD40L. Cytokine-positive CD8 T cells without HBcAg stimulation were present at a high frequency (7 of 13 cases) in Group B, but were rare in other groups. HBcAg-specific T cells can be detected at high frequency by a sensitive flow cytometric analysis, and these cells are important for controlling HBV replication.
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Affiliation(s)
- S Matsumura
- First Department of Internal Medicine, Okayama University Medical School, Okayama, Japan
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