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Sözeri B, Şahin N, Açarı C, Avar Aydın PO, Baba O, Bağlan E, Bakkaloğlu S, Bakırcı S, Bilginer Y, Bozkaya BY, Çağlayan Ş, Çakan M, Çakmak F, Coşkuner T, Demir F, Demirkan FG, Doğantan Ş, Adıgüzel Dündar H, Ersözlü ED, Gücenmez S, Gürler O, İşgüder R, Küçük A, Kalyoncu M, Kılıç L, Kılıç SŞ, Kısaoğlu H, Paç Kısaarslan A, Kızıldağ Z, Kurtuluş D, Özdel S, Öztürk K, Şenol P, Tanatar A, Taşkın SN, Tuncer Kuru F, Türkuçar S, Ulu K, Ünsal E, Yazıcı A, Gezgin Yıldırım D, Yüksel S, Kasapçopur Ö, Özen S, Aktay Ayaz N, Sönmez HE. Towards a standardized program of transitional care for adolescents with juvenile idiopathic arthritis for Turkey: a national survey study. Pediatr Rheumatol Online J 2024; 22:7. [PMID: 38167070 PMCID: PMC10762787 DOI: 10.1186/s12969-023-00943-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 12/09/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Juvenile idiopathic arthritis (JIA) is a prevalent childhood chronic arthritis, often persisting into adulthood. Effective transitional care becomes crucial as these patients transition from pediatric to adult healthcare systems. Despite the concept of transitional care being recognized, its real-world implementation remains inadequately explored. This study aims to evaluate the thoughts and practices of healthcare providers regarding transitional care for JIA patients. METHODS A cross-sectional survey was conducted among pediatric and adult rheumatologists in Turkey. Based on the American Academy of Pediatrics' six core elements of transitional care, the survey included 86 questions. The respondents' demographic data, attitudes towards transitional care, and practical implementation were assessed. RESULTS The survey included 48 rheumatologists, with 43.7% having a transition clinic. The main barriers to establishing transition programs were the absence of adult rheumatologists, lack of time, and financial constraints. Only 23.8% had a multidisciplinary team for transition care. Participants agreed on the importance of coordination and cooperation between pediatric and adult healthcare services. The timing of the transition process varied, with no consensus on when to initiate or complete it. Participants advocated for validated questionnaires adapted to local conditions to assess transition readiness. CONCLUSIONS The study sheds light on the challenges and perspectives surrounding transitional care for JIA patients in Turkey. Despite recognized needs and intentions, practical implementation remains limited due to various barriers. Cultural factors and resource constraints affect the transition process. While acknowledging the existing shortcomings, the research serves as a ground for further efforts to improve transitional care and ensure better outcomes for JIA patients transitioning into adulthood.
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Affiliation(s)
- Betül Sözeri
- Department of Pediatric Rheumatology, University of Health Sciences, Umraniye Research and Training Hospital, Istanbul, Turkey
| | - Nihal Şahin
- Department of Pediatric Rheumatology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Ceyhun Açarı
- Department of Pediatric Rheumatology, Faculty of Medicine, Inönü University, Malatya, Turkey
| | | | - Ozge Baba
- Department of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Esra Bağlan
- Department of Pediatric Rheumatology, Etlik State Hospital, Ankara, Turkey
| | - Sevcan Bakkaloğlu
- Department of Pediatric Rheumatology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Sibel Bakırcı
- Department of Rheumatology, Antalya State Hospital, Antalya, Turkey
| | - Yelda Bilginer
- Department of Pediatric Rheumatology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Burcu Yücel Bozkaya
- Department of Pediatric Rheumatology, Samsun Research and Training Hospital, Samsun, Turkey
| | - Şengül Çağlayan
- Department of Pediatric Rheumatology, University of Health Sciences, Umraniye Research and Training Hospital, Istanbul, Turkey
| | - Mustafa Çakan
- Department of Pediatric Rheumatology, Zeynep Kamil Research and Training Hospital, Istanbul, Turkey
| | - Figen Çakmak
- Department of Pediatric Rheumatology, Başakşehir Çam and Sakura State Hospital, Istanbul, Turkey
| | - Taner Coşkuner
- Department of Pediatric Rheumatology, University of Health Sciences, Umraniye Research and Training Hospital, Istanbul, Turkey
| | - Ferhat Demir
- Department of Pediatric Rheumatology, Acıbadem Hospital, Istanbul, Turkey
| | - Fatma Gül Demirkan
- Department of Pediatric Rheumatology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Şeyda Doğantan
- Department of Pediatric Rheumatology, Mersin City Hospital, Mersin, Turkey
| | - Hatice Adıgüzel Dündar
- Department of Pediatric Rheumatology, Behçet Uz Research and Training Hospital, Izmir, Turkey
| | - Emine Duygu Ersözlü
- Department of Rheumatology, Adana City Research and Training Hospital, Adana, Turkey
| | - Sercan Gücenmez
- Department of Rheumatology, Izmir Atatürk Research and Training Hospital, Izmir, Turkey
| | - Oğuz Gürler
- Department of Rheumatology, Medikal Park Hospital, Samsun, Turkey
| | - Rana İşgüder
- Department of Pediatric Rheumatology, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
| | - Adem Küçük
- Department of Rheumatology, Faculty of Medicine, Konya Selçuk University, Konya, Turkey
| | - Mukaddes Kalyoncu
- Department of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Levent Kılıç
- Department of Rheumatology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Sara Şebnem Kılıç
- Department of Pediatric Rheumatology, Faculty of Medicine, Uludağ University, Bursa, Turkey
| | - Hakan Kısaoğlu
- Department of Pediatric Rheumatology, Kayseri City Hospital, Kayseri, Turkey
| | - Ayşenur Paç Kısaarslan
- Department of Pediatric Rheumatology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Zehra Kızıldağ
- Department of Pediatric Rheumatology, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
| | - Duygu Kurtuluş
- Department of Physical Therapy and Rehabilitation, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Semanur Özdel
- Department of Pediatric Rheumatology, Etlik State Hospital, Ankara, Turkey
| | - Kübra Öztürk
- Department of Pediatric Rheumatology, Göztepe Research and Training Hospital, Istanbul, Turkey
| | - Pelin Şenol
- Department of Pediatric Rheumatology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Ayşe Tanatar
- Department of Pediatric Rheumatology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Sema Nur Taşkın
- Department of Pediatric Rheumatology, Eskişehir City Hospital, Eskişehir, Turkey
| | - Fatma Tuncer Kuru
- Department of Rheumatology, Osmaniye State Hospital, Osmaniye, Turkey
| | - Serkan Türkuçar
- Department of Pediatric Rheumatology, Faculty of Medicine, Pamukkale University, Denizli, Turkey
| | - Kadir Ulu
- Department of Pediatric Rheumatology, University of Health Sciences, Umraniye Research and Training Hospital, Istanbul, Turkey
| | - Erbil Ünsal
- Department of Pediatric Rheumatology, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
| | - Ayten Yazıcı
- Department of Rheumatology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Deniz Gezgin Yıldırım
- Department of Pediatric Rheumatology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Selçuk Yüksel
- Department of Pediatric Rheumatology, Faculty of Medicine, Onsekiz Mart University, Çanakkele, Turkey
| | - Özgür Kasapçopur
- Department of Pediatric Rheumatology, Istanbul University-Cerrahpaşa, Cerrahpaşa Medical School, Istanbul, Turkey
| | - Seza Özen
- Department of Pediatric Rheumatology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Nuray Aktay Ayaz
- Department of Pediatric Rheumatology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Hafize Emine Sönmez
- Department of Pediatric Rheumatology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey.
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Kisaoglu H, Sener S, Aslan E, Baba O, Sahin S, Bilginer Y, Kasapcopur O, Ozen S, Kalyoncu M. Impact of serological activity on flare following clinically inactive disease and remission in childhood-onset systemic lupus erythematosus. Rheumatology (Oxford) 2023:kead647. [PMID: 38048608 DOI: 10.1093/rheumatology/kead647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/18/2023] [Accepted: 11/11/2023] [Indexed: 12/06/2023] Open
Abstract
OBJECTIVES To assess the association between serological activity (SA) and clinical inactivity in SLE and to investigate whether SA predicts flare after clinically inactive disease (CID) and remission. METHODS Longitudinal data of children from 3 paediatric rheumatology referral centres were retrospectively reviewed. CID was defined as clinical SLEDAI = 0 in patients with a prednisolone dose < 15 mg/day. A modified DORIS remission on treatment criteria was used to determine remission. RESULTS Of the 124 patients included, 89.5% displayed SA at onset. Through follow-up, the rate of SA decreased to 43.3% at first CID and 12.1% at remission. Among patients with CID, 24 (20.7%) experienced a moderate to severe flare before the attainment ofremission. While previous proliferative lupus nephritis (OR : 10.2, p: 0.01) and autoimmune haemolytic anaemia (OR : 6.4, p: 0.02) were significantly associated with an increased odds of flare after CID, SA at CID was not associated with flare. In contrast, 21 (19.6%) patients experienced a flare in a median of 18 months after remission. Hypocomplementemia (OR : 9.8, p: 0.02) and a daily hydroxychloroquine dose < 5 mg/kg (OR : 5.8, p: 0.02) at remission significantly increased the odds of flare. CONCLUSION SA increases the odds of flare at remission but not at CID. Suboptimal dosing of hydroxychloroquine should be avoided, especially in children with SA in remission to lower the risk of flares.
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Affiliation(s)
- Hakan Kisaoglu
- Division of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, TURKEY
| | - Seher Sener
- Division of Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, TURKEY
| | - Esma Aslan
- Division of Pediatric Rheumatology, Istanbul University Cerrahpasa Faculty of Medicine, Istanbul, TURKEY
| | - Ozge Baba
- Division of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, TURKEY
| | - Sezgin Sahin
- Division of Pediatric Rheumatology, Istanbul University Cerrahpasa Faculty of Medicine, Istanbul, TURKEY
| | - Yelda Bilginer
- Division of Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, TURKEY
| | - Ozgur Kasapcopur
- Division of Pediatric Rheumatology, Istanbul University Cerrahpasa Faculty of Medicine, Istanbul, TURKEY
| | - Seza Ozen
- Division of Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, TURKEY
| | - Mukaddes Kalyoncu
- Division of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, TURKEY
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Baba O, Kisaoglu H, Kalyoncu M. Letrozole-induced inflammatory arthritis and tendinopathy in pediatric rheumatology setting. Int J Rheum Dis 2023; 26:2314-2316. [PMID: 37218595 DOI: 10.1111/1756-185x.14748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/24/2023]
Abstract
Musculoskeletal symptoms associated with the use of aromatase inhibitors are a well-known side effect of these drugs and are more prevalent in postmenopausal women. Aromatase inhibitor-associated symptoms are not overt inflammatory processes so are described as arthralgia syndrome. In contrast, aromatase inhibitor-associated inflammatory conditions such as myopathies, vasculitis, and rheumatoid arthritis were also reported. To our knowledge, inflammatory arthritis or tendinopathy associated with aromatase inhibitors were not reported in children despite their increased off-label use in the pediatric setting. Herein, we report a girl with inflammatory arthritis and tendinopathy associated with letrozole treatment.
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Affiliation(s)
- Ozge Baba
- Faculty of Medicine, Department of Pediatrics, Division of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
| | - Hakan Kisaoglu
- Faculty of Medicine, Department of Pediatrics, Division of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
| | - Mukaddes Kalyoncu
- Faculty of Medicine, Department of Pediatrics, Division of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
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de Heer EC, Zois CE, Bridges E, van der Vegt B, Sheldon H, Veldman WA, Zwager MC, van der Sluis T, Haider S, Morita T, Baba O, Schröder CP, de Jong S, Harris AL, Jalving M. Correction: Glycogen synthase 1 targeting reveals a metabolic vulnerability in triple-negative breast cancer. J Exp Clin Cancer Res 2023; 42:220. [PMID: 37635223 PMCID: PMC10463864 DOI: 10.1186/s13046-023-02800-3] [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: 08/29/2023] Open
Affiliation(s)
- E. C. de Heer
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, Groningen, 9700 RB The Netherlands
| | - C. E. Zois
- Department of Oncology, Weatherall Institute of Molecular Medicine, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, University of Oxford, Oxford, OX3 9DS UK
- Department of Radiotherapy and Oncology, School of Health, Democritus University of Thrace, Alexandroupolis, Greece
- Department of Oncology, MRC Weatherall Institute of Molecular Medicine, Molecular Oncology Laboratories, John Radclife Hospital, Oxford University, Oxford, OX3 9DS UK
| | - E. Bridges
- Department of Oncology, Weatherall Institute of Molecular Medicine, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, University of Oxford, Oxford, OX3 9DS UK
| | - B. van der Vegt
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - H. Sheldon
- Department of Oncology, Weatherall Institute of Molecular Medicine, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, University of Oxford, Oxford, OX3 9DS UK
| | - W. A. Veldman
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, Groningen, 9700 RB The Netherlands
| | - M. C. Zwager
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - T. van der Sluis
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - S. Haider
- The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, UK
| | - T. Morita
- Tokushima University Graduate School, 3-18-15, Kuramoto-Cho, Tokushima, 770-8504 Japan
| | - O. Baba
- Tokushima University Graduate School, 3-18-15, Kuramoto-Cho, Tokushima, 770-8504 Japan
| | - C. P. Schröder
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, Groningen, 9700 RB The Netherlands
- Department of Medical Oncology, Antoni Van Leeuwenhoek-Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - S. de Jong
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, Groningen, 9700 RB The Netherlands
| | - A. L. Harris
- Department of Oncology, Weatherall Institute of Molecular Medicine, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, University of Oxford, Oxford, OX3 9DS UK
| | - M. Jalving
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, Groningen, 9700 RB The Netherlands
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de Heer EC, Zois CE, Bridges E, van der Vegt B, Sheldon H, Veldman WA, Zwager MC, van der Sluis T, Haider S, Morita T, Baba O, Schröder CP, de Jong S, Harris AL, Jalving M. Glycogen synthase 1 targeting reveals a metabolic vulnerability in triple-negative breast cancer. J Exp Clin Cancer Res 2023; 42:143. [PMID: 37280675 PMCID: PMC10242793 DOI: 10.1186/s13046-023-02715-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 05/18/2023] [Indexed: 06/08/2023] Open
Abstract
BACKGROUND Hypoxia-induced glycogen turnover is implicated in cancer proliferation and therapy resistance. Triple-negative breast cancers (TNBCs), characterized by a hypoxic tumor microenvironment, respond poorly to therapy. We studied the expression of glycogen synthase 1 (GYS1), the key regulator of glycogenesis, and other glycogen-related enzymes in primary tumors of patients with breast cancer and evaluated the impact of GYS1 downregulation in preclinical models. METHODS mRNA expression of GYS1 and other glycogen-related enzymes in primary breast tumors and the correlation with patient survival were studied in the METABRIC dataset (n = 1904). Immunohistochemical staining of GYS1 and glycogen was performed on a tissue microarray of primary breast cancers (n = 337). In four breast cancer cell lines and a mouse xenograft model of triple-negative breast cancer, GYS1 was downregulated using small-interfering or stably expressed short-hairpin RNAs to study the effect of downregulation on breast cancer cell proliferation, glycogen content and sensitivity to various metabolically targeted drugs. RESULTS High GYS1 mRNA expression was associated with poor patient overall survival (HR 1.20, P = 0.009), especially in the TNBC subgroup (HR 1.52, P = 0.014). Immunohistochemical GYS1 expression in primary breast tumors was highest in TNBCs (median H-score 80, IQR 53-121) and other Ki67-high tumors (median H-score 85, IQR 57-124) (P < 0.0001). Knockdown of GYS1 impaired proliferation of breast cancer cells, depleted glycogen stores and delayed growth of MDA-MB-231 xenografts. Knockdown of GYS1 made breast cancer cells more vulnerable to inhibition of mitochondrial proteostasis. CONCLUSIONS Our findings highlight GYS1 as potential therapeutic target in breast cancer, especially in TNBC and other highly proliferative subsets.
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Affiliation(s)
- E C de Heer
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, 9700 RB, Groningen, The Netherlands
| | - C E Zois
- Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, Oxford, OX3 9DS, UK.
- Department of Radiotherapy and Oncology, School of Health, Democritus University of Thrace, Alexandroupolis, Greece.
- Department of Oncology, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Molecular Oncology Laboratories, Oxford University, Oxford, OX3 9DS, UK.
| | - E Bridges
- Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, Oxford, OX3 9DS, UK
| | - B van der Vegt
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - H Sheldon
- Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, Oxford, OX3 9DS, UK
| | - W A Veldman
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, 9700 RB, Groningen, The Netherlands
| | - M C Zwager
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - T van der Sluis
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - S Haider
- The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, UK
| | - T Morita
- Tokushima University Graduate School, 3-18-15, Kuramoto-Cho, Tokushima, 770-8504, Japan
| | - O Baba
- Tokushima University Graduate School, 3-18-15, Kuramoto-Cho, Tokushima, 770-8504, Japan
| | - C P Schröder
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, 9700 RB, Groningen, The Netherlands
- Department of Medical Oncology, Antoni Van Leeuwenhoek-Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - S de Jong
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, 9700 RB, Groningen, The Netherlands
| | - A L Harris
- Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, Oxford, OX3 9DS, UK
| | - M Jalving
- Department of Medical Oncology, University of Groningen, University Medical Center Groningen, PO Box 30.001, 9700 RB, Groningen, The Netherlands.
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Kisaoglu H, Baba O, Kalyoncu M. Genotype-Phenotype Associations of Children With Familial Mediterranean Fever in a Cohort Consisting of M694V Mutation and Implications for Colchicine-Resistant Disease. J Clin Rheumatol 2023; 29:207-213. [PMID: 36870084 DOI: 10.1097/rhu.0000000000001953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
OBJECTIVES The aim of this study was to investigate the clinical associations of the second allele mutations and the effect of genotype and presenting features on colchicine resistance in children with familial Mediterranean fever (FMF), carrying at least one M694V variant. METHODS The medical records of the patients diagnosed with FMF, in whom at least one allele M694V mutation was detected, were reviewed. Patients were grouped according to the genotype as M694V homozygotes, compound heterozygote M694V with an exon 10 mutation, compound heterozygote M694V with a variant of unknown significance (VUS), and M694V heterozygotes. Disease severity was assessed with the International Severity Scoring System for FMF. RESULTS Among the 141 patients included, homozygote M694V (43.3%) was the most frequent MEFV genotype. Clinical manifestations of FMF at diagnosis were not significantly different according to genotypic alterations except homozygote M694V. Besides, homozygous M694V was associated with a more severe disease, with more frequent comorbidities and colchicine-resistant disease. A lower disease severity score was observed in compound heterozygotes with VUS than in M694V heterozygotes (median 1 vs 2, p = 0.006). Regression analysis revealed that homozygous M694V, arthritis, and frequency of attacks were associated with an increased risk of colchicine-resistant disease. CONCLUSIONS Clinical manifestations of FMF at diagnosis with a M694V allele were predominantly influenced by the M694V rather than the second allele mutations. Although homozygous M694V was associated with the most severe form, the presence of compound heterozygosity with a VUS did not affect disease severity or clinical features. Homozygous M694V confers the highest risk of colchicine-resistant disease.
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Affiliation(s)
- Hakan Kisaoglu
- From the Division of Pediatric Rheumatology, Department of Pediatrics, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
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Kisaoglu H, Baba O, Kalyoncu M. Significance of the weighted complement domain of the EULAR/ACR classification criteria in juvenile onset systemic lupus erythematosus. Lupus 2023; 32:756-762. [PMID: 37069477 DOI: 10.1177/09612033231171343] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
OBJECTIVE We aimed to compare the clinical and laboratory characteristics of patients with SLE according to the weighted complement status of the EULAR/ACR criteria and investigate whether different weighting of the complement status at disease onset is associated with outcomes. METHODS Patients diagnosed with juvenile onset SLE who fulfilled the 2019 EULAR/ACR classification criteria were retrospectively analyzed. RESULTS Among 43 patients included, hypocomplementemia was observed in 37 (86%), mostly with a low level of both complement C3 (C3) and complement C4 (C4) (53.5%). In patients with low levels of both C3 and C4, more common cutaneous (65.2% vs 28.6%, p: 0.045), musculoskeletal involvement (78.3% vs 42.9%, p: 0.039), autoimmune hemolytic anemia (52.2% vs 14.3%, p: 0.035), positive anti-dsDNA (65.2% vs 21.4%, p: 0.017) and anti-Sm antibodies (60.9% vs 21.4%, p: 0.04) were observed. In addition these patients had higher scores from the 2019 EULAR/ACR classification criteria (26 vs 15.5, p: < 0.0001). Remission and flare rates, and SLE associated damage were not differed according to the complement status in patients with hypocomplementemia. CONCLUSION Observation of more frequent clinical and serological activity with higher total scores from the EULAR/ACR classification criteria supported the higher scoring of patients with low C3 and C4 in the weighted criteria. However, since significant number of patients did not exhibit low complement C4, and the frequency of kidney involvement did not differ according to the weighted complement status, complement C3 might be suggested as a more important diagnostic tool in patients with juvenile onset SLE. Also, weighted complement status at onset did not seem to affect the disease outcomes.
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Affiliation(s)
- Hakan Kisaoglu
- Faculty of Medicine, Department of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
| | - Ozge Baba
- Faculty of Medicine, Department of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
| | - Mukaddes Kalyoncu
- Faculty of Medicine, Department of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
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Kisaoglu H, Baba O, Kalyoncu M. Lupus low disease activity state as a treatment target for pediatric patients with lupus nephritis. Pediatr Nephrol 2023; 38:1167-1175. [PMID: 36156735 DOI: 10.1007/s00467-022-05742-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 04/19/2022] [Revised: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Lupus low disease activity state (LLDAS) is a treatment target for patients with SLE and is associated with decreased risk for severe flare and new damage. We investigated the utility of the achievement of LLDAS in children with lupus nephritis and whether attainment of LLDAS is associated with more favorable outcomes. METHODS Data of children, diagnosed with biopsy-proven lupus nephritis between January 2012 and December 2020, were retrospectively analyzed. RESULTS For patients who did not achieve LLDAS after initial treatment (first 6 months), presence of autoimmune hemolytic anemia (62% vs. 18%, p = 0.047), anti-Sm (85% vs. 18%, p = 0.003) and anti-dsDNA (77% vs. 27%, p = 0.038) antibodies, proliferative lupus nephritis (77% vs. 27%, p = 0.038), and hypertension (69% vs. 9%, p = 0.005) at onset were more frequently encountered. Also, a lower rate of complete kidney response (43% vs. 100%, p = 0.005) and a higher rate of hypertension (86% vs. 13%, p = 0.002) were observed in patients who did not achieve LLDAS-50, defined as being in LLDAS at least 50% of the observation time. Attainment of both LLDAS after initial treatment and LLDAS-50 were associated with lower rates of kidney flare (p = 0.001 and p = 0.002, respectively) and damage accrual (p = 0.007 and p = 0.02, respectively) through the observation period. CONCLUSIONS LLDAS is an attainable treatment target for children with lupus nephritis and associated with lower rates of kidney flare and damage. Presence of hematologic involvement, hypertension, and proliferative lupus nephritis at onset adversely influenced the early achievement of LLDAS. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Hakan Kisaoglu
- Division of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey.
| | - Ozge Baba
- Division of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Mukaddes Kalyoncu
- Division of Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey.,Division of Pediatric Nephrology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
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9
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Baba O, Kisaoglu H, Bilginer C, Ozkaya E, Kalyoncu M. Depression, anxiety, and sleep quality in childhood onset systemic lupus erythematosus and relationship with brain-derived neurotrophic factor. Lupus 2022; 31:1630-1638. [DOI: 10.1177/09612033221127901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background The association between brain-derived neurotrophic factor (BDNF) and systemic lupus erythematosus (SLE) is controversial, and no study investigated the clinical associations of BDNF in patients with childhood onset systemic lupus erythematosus (cSLE). In this study, we aimed to investigate the serum levels of BDNF in patients with cSLE and examine whether a relationship of BDNF exists among depression, anxiety, and sleep quality. Methods Thirty patients and age-sex matched healthy controls were included. Depression, anxiety, sleep quality and quality of life were assessed by relevant questionnaires. Disease activity was assessed according to the SLE disease activity index (SLEDAI) and serum BDNF level was measured by the enzyme-linked immunosorbent assay method. Results Serum BDNF level was significantly lower in cSLE patients than healthy controls (21981 vs 29905 pg/mL, p = 0.001) and significantly decreased level was observed in active cSLE (SLEDAI >0), then those with SLEDAI = 0 (17110 vs 26852 pg/mL, p = 0.005). Although the scores of the depression, anxiety, sleep quality and quality of life questionnaires were strongly correlated with each other, no correlation was observed with serum BDNF levels. Conclusions In patients with cSLE, serum level of BDNF was significantly decreased compared to healthy controls. Our results suggest that serum BDNF levels were not associated with the presence of anxiety, depression and poor sleep quality and might be dictated by the pathophysiological process of SLE rather than mood disorders.
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Affiliation(s)
- Ozge Baba
- Department of Pediatrics, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Hakan Kisaoglu
- Department of Pediatrics, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Cilem Bilginer
- Department of Child and Adolescent Psychiatry, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Esra Ozkaya
- Department of Medical Microbiology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Mukaddes Kalyoncu
- Department of Pediatrics, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
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10
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Kisaoglu H, Baba O, Kalyoncu M. Hematologic manifestations of juvenile systemic lupus erythematosus: An emphasis on anemia. Lupus 2022; 31:730-736. [DOI: 10.1177/09612033221093508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective Anemia is common in patients with juvenile systemic lupus erythematosus (jSLE). While autoimmune hemolytic anemia (AIHA) is the only etiology included in the classification criteria, the etiology of anemia in jSLE may be diverse. We aimed to investigate the etiology of anemia in jSLE and the relationship between anemia and disease characteristics at onset and during the follow-up period. Methods Patients diagnosed with jSLE who met the Systemic Lupus Erythematosus International Collaborating Clinics classification criteria between January 2012 and December 2020 were retrospectively analyzed. Results Hematologic involvement was observed in 70% of the patients. Anemia was the most common cytopenia among patients (60%). Anemia of chronic disease (ACD) and AIHA were the most common etiological factors, both observed in 23% of patients. Patients with anemia had a significantly higher rate of positive ds-DNA antibody and higher erythrocyte sedimentation rate (ESH) and Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) scores. ESH, serum ferritin, and SLEDAI scores negatively correlated with hemoglobin levels in patients with anemia. Iron deficiency was the sole etiology of new-onset anemia. Patients with new-onset anemia during the follow-up period had significantly lower hemoglobin values at onset and a higher rate of renal involvement. Conclusion Anemia in jSLE is mostly AIHA and ACD, but iron deficiency is not rare. The severity of inflammation is associated with the severity of anemia. During the follow-up period, iron deficiency was the predominant cause of anemia, especially in patients with lower hemoglobin concentrations at onset and renal involvement.
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Affiliation(s)
- Hakan Kisaoglu
- Faculty of Medicine, Department of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
| | - Ozge Baba
- Faculty of Medicine, Department of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
| | - Mukaddes Kalyoncu
- Faculty of Medicine, Department of Pediatric Rheumatology, Karadeniz Technical University, Trabzon, Turkey
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11
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Sozeri B, Ulu K, Kaya-Akça U, Haslak F, Pac-Kisaarslan A, Otar-Yener G, Baba O, Altug-Gucenmez O, Sahin N, Bağlan E, Sönmez HE, Cakmak F, Ozturk K, Gezgin-Yıldırım D, Şener S, Barut K, Batu ED, Yıldız M, Basaran O, Adrovic A, Sahin S, Ozdel S, Bilginer Y, Poyrazoglu MH, Demir F, Yuksel S, Kalyoncu M, Kasapcopur O, Ozen S, Aktay-Ayaz N. The clinical course of SARS-CoV-2 infection among children with rheumatic disease under biologic therapy: a retrospective and multicenter study. Rheumatol Int 2021; 42:469-475. [PMID: 34570263 PMCID: PMC8475421 DOI: 10.1007/s00296-021-05008-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 09/20/2021] [Indexed: 12/19/2022]
Abstract
The effects of biological disease-modifying antirheumatic drugs (bDMARDs) in the clinical course of COVID-19 on children with underlying rheumatologic diseases have not been fully demonstrated. To evaluate the course of COVID-19 infection in patients with rheumatic disease receiving bDMARD treatment. This was a retrospective, multicenter study conducted in pediatric patients infected by SARS-CoV-2 and under bDMARDs therapy. The study population consisted of 113 patients (72 female/41 male). The mean age of the patients was 12.87 ± 4.69 years. The primary diagnosis of the cohort was as follows: 63 juvenile idiopathic arthritis, 35 systemic autoinflammatory diseases, 10 vasculitides, and five cases of connective tissue diseases. The mean duration of the primary disease was 4.62 ± 3.65 years. A total of 19 patients had additional comorbid diseases. Thirty-five patients were treated with canakinumab, 25 with adalimumab, 18 with etanercept, 10 with infliximab, nine with tocilizumab, six with rituximab, four with anakinra, three with tofacitinib, and one with abatacept. The median exposure time of the biological drug was 13.5 months. Seventy-one patients had symptomatic COVID-19, while 42 were asymptomatic. Twenty-four patients required hospitalization. Five patients presented with MIS-C. The hospitalized patients were younger and had a shorter duration of rheumatic disease compared to ambulatory patients, although the difference was not statistically significant. Steroid usage, presence of fever, and dyspnea were more common among the hospitalized patients. A worsening in the course of both COVID-19 and current disease was not noticed under bDMARDs, however, to end with a strong conclusion multicentric international studies are required.
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Affiliation(s)
- Betul Sozeri
- Department of Pediatric Rheumatology, University of Health Sciences, Ümraniye Research and Training Hospital, Istanbul, Turkey.
| | - Kadir Ulu
- Pediatric Rheumatology, University of Health Sciences, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Ummusen Kaya-Akça
- Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Fatih Haslak
- Pediatric Rheumatology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | | | - Gulcin Otar-Yener
- Pediatric Rheumatology, Sanliurfa Training and Research Hospital, Sanliurfa, Turkey
| | - Ozge Baba
- Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | | | - Nihal Sahin
- Pediatric Rheumatology, Health Sciences University, Bursa Center Hospital, Bursa, Turkey
| | - Esra Bağlan
- Pediatric Rheumatology, Health Sciences University, Sami Ulus Training and Research Hospital, Ankara, Turkey
| | - Hafize Emine Sönmez
- Pediatric Rheumatology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - Figen Cakmak
- Pediatric Rheumatology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Kubra Ozturk
- Pediatric Rheumatology, Medeniyet University, Goztepe Training and Research Hospital, Istanbul, Turkey
| | | | - Seher Şener
- Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Kenan Barut
- Pediatric Rheumatology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ezgi Deniz Batu
- Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mehmet Yıldız
- Pediatric Rheumatology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ozge Basaran
- Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Amra Adrovic
- Pediatric Rheumatology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Sezgin Sahin
- Pediatric Rheumatology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Semanur Ozdel
- Pediatric Rheumatology, Health Sciences University, Sami Ulus Training and Research Hospital, Ankara, Turkey
| | - Yelda Bilginer
- Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | | | - Ferhat Demir
- Pediatric Rheumatology, University of Health Sciences, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Selcuk Yuksel
- Pediatric Rheumatology, Faculty of Medicine, Pamukkale University, Denizli, Turkey
| | - Mukaddes Kalyoncu
- Pediatric Rheumatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Ozgur Kasapcopur
- Pediatric Rheumatology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Seza Ozen
- Pediatric Rheumatology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Nuray Aktay-Ayaz
- Pediatric Rheumatology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
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12
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Abstract
The extracellular matrix (ECM) of bone and dentin contains several non-collagenous proteins. One category of non-collagenous protein is termed the SIBLING (Small Integrin-Binding LIgand, N-linked Glycoprotein) family, that includes osteopontin (OPN), bone sialoprotein (BSP), dentin matrix protein 1 (DMP1), dentin sialophosphoprotein (DSPP), and matrix extracellular phosphoglycoprotein (MEPE). These polyanionic SIBLING proteins are believed to play key biological roles in the mineralization of bone and dentin. Although the specific mechanisms involved in controlling bone and dentin formation are still unknown, it is clear that some functions of the SIBLING family members are dependent on the nature and extent of post-translational modifications (PTMs), such as phosphorylation, glycosylation, and proteolytic processing, since these PTMs would have significant effects on their structure. OPN and BSP are present in the ECM of bone and dentin as full-length forms, whereas amino acid sequencing indicates that DMP1 and DSPP exist as proteolytically processed fragments that result from scission of X-Asp bonds. We hypothesized that the processing of DMP1 and DSPP is catalyzed by the PHEX enzyme, since this protein, an endopeptidase that is predominantly expressed in bone and tooth, has a strong preference for cleavage at the NH2-terminus of aspartyl residue. We envision that the proteolytic processing of DMP1 and DSPP may be an activation process that plays a significant, crucial role in osteogenesis and dentinogenesis, and that a failure in this processing would cause defective mineralization in bone and dentin, as observed in X-linked hypophosphatemic rickets.
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Affiliation(s)
- C Qin
- The Department of Endodontics and Periodontics, University of Texas-Houston Health Science Center, Dental Branch, Houston, TX 77030, USA.
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13
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Fujikawa K, Yokohama-Tamaki T, Morita T, Baba O, Qin C, Shibata S. An in situ hybridization study of perlecan, DMP1, and MEPE in developing condylar cartilage of the fetal mouse mandible and limb bud cartilage. Eur J Histochem 2015; 59:2553. [PMID: 26428891 PMCID: PMC4598603 DOI: 10.4081/ejh.2015.2553] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 08/25/2015] [Accepted: 08/30/2015] [Indexed: 11/23/2022] Open
Abstract
The main purpose of this in situ hybridization study was to investigate mRNA expression of three bone/cartilage matrix components (perlecan, DMP1, and MEPE) in developing primary (tibial) and secondary (condylar) cartilage. Perlecan mRNA expression was first detected in newly formed chondrocytes in tibial cartilage at E13.0, but this expression decreased in hypertrophic chondrocytes at E14.0. In contrast, at E15.0, perlecan mRNA was first detected in the newly formed chondrocytes of condylar cartilage; these chondrocytes had characteristics of hypertrophic chondrocytes, which confirmed the previous observation that progenitor cells of developing secondary cartilage rapidly differentiate into hypertrophic chondrocytes. DMP1 mRNA was detected in many chondrocytes within the lower hypertrophic cell zone in tibial cartilage at E14.0. In contrast, DMP1 mRNA expression was only transiently detected in a few chondrocytes of condylar cartilage at E15.0. Thus, DMP1 may be less important in the developing condylar cartilage than in the tibial cartilage. Another purpose of this study was to test the hypothesis that MEPE may be a useful marker molecule for cartilage. MEPE mRNA was not detected in any chondrocytes in either tibial or condylar cartilage; however, MEPE immunoreactivity was detected throughout the cartilage matrix. Western immunoblot analysis demonstrated that MEPE antibody recognized two bands, one of 67 kDa and another of 59 kDa, in cartilage-derived samples. Thus MEPE protein may gradually accumulate in the cartilage, even though mRNA expression levels were below the limits of detection of in situ hybridization. Ultimately, we could not designate MEPE as a marker molecule for cartilage, and would modify our original hypothesis.
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14
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Hasegawa S, Uchida F, Baba O, Ito T, Yamatoji M, Kanno N, Yamagata K, Yanagawa T, Bukawa H. miR-205-5p Targets Interferon Regulatory Factor 1 and Suppresses Metastasis in Oral Cancer Cells. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.294] [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: 10/24/2022]
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15
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Baba O, Ito T, Uchida F, Yamatoji M, Kanno N, Yamagata K, Hasegawa S, Yanagawa T, Bukawa H. Utility of saliva in the evaluation of microRNA functions as a tumor suppressor in oral squamous cell carcinoma. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Shibata S, Sakamoto Y, Baba O, Qin C, Murakami G, Cho BH. An immunohistochemical study of matrix proteins in the craniofacial cartilage in midterm human fetuses. Eur J Histochem 2013; 57:e39. [PMID: 24441192 PMCID: PMC3896041 DOI: 10.4081/ejh.2013.e39] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 11/21/2013] [Accepted: 10/14/2013] [Indexed: 11/23/2022] Open
Abstract
Immunohistochemical localization of collagen types I, II, and X, aggrecan, versican, dentin matrix protein (DMP)-1, martix extracellular phosphoprotein (MEPE) were performed for Meckel's cartilage, cranial base cartilage, and mandibular condylar cartilage in human midterm fetuses; staining patterns within the condylar cartilage were compared to those within other cartilaginous structures. Mandibular condylar cartilage contained aggrecan; it also had more type I collagen and a thicker hypertrophic cell layer than the other two types of cartilage; these three characteristics are similar to those of the secondary cartilage of rodents. MEPE immunoreactivity was first evident in the cartilage matrix of all types of cartilage in the human fetuses and in Meckel's cartilage of mice and rats. MEPE immunoreactivity was enhanced in the deep layer of the hypertrophic cell layer and in the cartilaginous core of the bone trabeculae in the primary spongiosa. These results indicated that MEPE is a component of cartilage matrix and may be involved in cartilage mineralization. DMP-1 immunoreactivity first became evident in human bone lacunae walls and canaliculi; this pattern of expression was comparable to the pattern seen in rodents. In addition, chondroid bone was evident in the mandibular (glenoid) fossa of the temporal bone, and it had aggrecan, collagen types I and X, MEPE, and DMP-1 immunoreactivity; these findings indicated that chondroid bone in this region has phenotypic expression indicative of both hypertrophic chondrocytes and osteocytes.
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Affiliation(s)
- S Shibata
- Tokyo Medical and Dental University.
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17
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Abstract
Amelogenin is recognized as an enamel protein associated with enamel formation. Besides this well-known function, remarkable root resorption has been seen in amelogenin-null mutant mice. Moreover, in vitro culture studies showed that amelogenin suppressed osteoclast differentiation. These studies raised the hypothesis that amelogenin can inhibit root resorption by reducing odontoclast number. To examine this hypothesis, we applied porcine amelogenins in a rat root resorption model, in which maxillary first molars were replanted after being air-dried. Compared with untreated and carrier-treated tooth roots, the application dramatically reduced the odontoclast number on root surfaces and inhibited cementum and root dentin resorption. Amelogenin significantly reduced the number of human odontoclastic cells in culture. It also inhibited RANKL expression in mouse bone marrow cell cultures. All these findings support our hypothesis that amelogenin application suppresses root resorption by inhibiting odontoclast number, and suggest that this is mediated by the regulation of RANKL expression.
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Affiliation(s)
- Y Yagi
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
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18
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Young CS, Kim SW, Qin C, Baba O, Butler WT, Taylor RR, Bartlett JD, Vacanti JP, Yelick PC. Developmental analysis and computer modelling of bioengineered teeth. Arch Oral Biol 2005; 50:259-65. [PMID: 15721159 DOI: 10.1016/j.archoralbio.2004.11.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2004] [Accepted: 11/19/2004] [Indexed: 01/09/2023]
Abstract
Here we present the developmental progression of bioengineered pig teeth from 1 to 25 weeks of development. We demonstrate that 2-25 week implants contained embryonic tooth bud- and cap-stage tooth structures consisting of dental epithelium expressing the sonic hedgehog gene and condensed dental mesenchyme. Implants harvested at 18-25 weeks also contained tooth bud-like structures, as well as mature tooth structures containing enamel, dentin and pulp tissues. Immunohistochemical analyses confirmed the expression of dentin- and enamel-specific proteins in differentiated bioengineered tooth tissues. Three-dimensional computer modelling further demonstrated a spatial organization of enamel, dentin and pulp tissues resembling that of natural teeth. We conclude that bioengineered teeth commonly exhibit morphological stages characteristic of naturally forming teeth. Furthermore, the presence of immature tooth buds at all times assayed and increased numbers of bioengineered tooth structures over time suggests that porcine dental progenitor cells maintain the ability to form teeth for at least 25 weeks.
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Affiliation(s)
- C S Young
- Department of Cytokine Biology, The Forsyth Institute, 140 The Fenway, Boston, MA 02115, USA
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Kitahara Y, Suda N, Terashima T, Baba O, Mekaapiruk K, Hammond VE, Takano Y, Ohyama K. Accelerated bone formation and increased osteoblast number contribute to the abnormal tooth germ development in parathyroid hormone-related protein knockout mice. Bone 2004; 35:1100-6. [PMID: 15542035 DOI: 10.1016/j.bone.2004.06.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2003] [Revised: 06/04/2004] [Accepted: 06/08/2004] [Indexed: 11/20/2022]
Abstract
Our previous study showed that tooth germs at late embryonic stage [later than embryonic day 17.5 (E17.5)] and neonatal homozygous parathyroid hormone-related protein (PTHrP)-knockout mice are compressed or penetrated by the surrounding alveolar bone tissue. In vivo and in vitro studies have shown that the development of the tooth germ proper is not disturbed, but insufficient alveolar bone resorption, due to the decreased number and hypofunction of osteoclasts, is the main cause of this abnormality. In addition to the insufficient alveolar bone resorption, progressive bone formation toward tooth germs was observed in homozygous mice, suggesting that accelerated bone formation also contributes to this abnormality. To further investigate this, homozygous mice at E14.0 and E15.5, when alveolar bone is forming, were used for histochemical and bone histomorphometric analyses. In contrast to the late embryonic stage, the alveolar bone did not yet compress developing tooth germs in homozygous mice on E14.0, but a larger amount of bone tissue was seen compared to wild-type littermates. Histomorphometric analysis of bone at E14.0 revealed that the osteoblast numbers and surfaces in the mandibles and in the bone collar of femora of homozygous mice were significantly higher than those of wild-type mice. However, unlike our previous study showing the osteoclast surface on E18.5 in homozygous mice to be significantly lower than that of wild-type mice, this study at E14.0 showed no significant difference between the two genotypes. To evaluate the amount of calcification around tooth germs, 3D images of mandibles were reconstructed from the calcein-labeled sections of the wild-type and mutant mice. Labeling was performed at E14.0, and the mice were sacrificed 1 h after the calcein injection to minimize the effect of bone resorption. Comparison of the 3D images revealed that the labeled surface was larger around developing tooth germs in homozygous mouse than in wild-type mouse. On day E15.5, osteoblasts approached the enamel organ of homozygous mice but this was not observed in wild-type mice. In this study, we report a systemic increase in osteoblast number and accelerated bone formation in homozygous PTHrP-knockout mice, both of which contribute to the abnormal tooth development.
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Affiliation(s)
- Y Kitahara
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, Tokyo 113-8549, Japan.
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20
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Sena K, Morotome Y, Baba O, Terashima T, Takano Y, Ishikawa I. Gene expression of growth differentiation factors in the developing periodontium of rat molars. J Dent Res 2003; 82:166-71. [PMID: 12598543 DOI: 10.1177/154405910308200304] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Growth and differentiation factors (GDF) 5, 6, and 7 are known to play roles in tendon and ligament formation, and are therefore probably involved in the formation of periodontal ligament. In this study, we sought to determine temporal and spatial expression of GDF-5, -6, and -7 mRNA in developing periodontal tissue of rat molars using in situ hybridization. GDF gene expression in the periodontal ligament was first detected in cells associated with the initial process of periodontal ligament fiber bundle formation. Gene signals were also detected in cells located along the alveolar bone and cementum surfaces, the insertion sites of periodontal ligaments, during the course of root formation. GDF expression in these cells were down-regulated after completion of root formation. Our results appeared to suggest the involvement of GDF-5, -6, and -7 in the formation of the dental attachment apparatus.
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Affiliation(s)
- K Sena
- Periodontology and Biostructural Science, Department of Hard Tissue Engineering, Graduate School of Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyou-ku, Tokyo 113-8549, Japan.
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Suda N, Baba O, Udagawa N, Terashima T, Kitahara Y, Takano Y, Kuroda T, Senior PV, Beck F, Hammond VE. Parathyroid hormone-related protein is required for normal intramembranous bone development. J Bone Miner Res 2001; 16:2182-91. [PMID: 11760831 DOI: 10.1359/jbmr.2001.16.12.2182] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
It is well established that parathyroid hormone-related protein (PTHrP) regulates chondrocytic differentiation and endochondral bone formation. Besides its effect on cartilage, PTHrP and its major receptor (type I PTH/PTHrP receptor) have been found in osteoblasts, suggesting an important role of PTHrP during the process of intramembranous bone formation. To clarify this issue, we examined intramembranous ossification in homozygous PTHrP-knockout mice histologically. We also analyzed phenotypic markers of osteoblasts and osteoclasts in vitro and in vivo. A well-organized branching and anastomosing pattern was seen in the wild-type mice. In contrast, marked disorganization of the branching pattern of bone trabeculae and irregularly aligned osteoblasts were recognized in the mandible and in the bone collar of the femur of neonatal homozygous mutant mice. In situ hybridization showed that most of the osteoblasts along the bone surfaces of the wild-type mice and some of the irregularly aligned osteoblastic cells in the homozygous mice expressed osteocalcin. Alkaline phosphatase (ALP) activity and expression of osteopontin messenger RNA (mRNA) in primary osteoblastic cells did not show significant differences between cultures derived from the mixture of heterozygous mutant and wild-type mice (+/? mice) and those from homozygous mutant mice. However, both mRNA and protein levels of osteocalcin in the osteoblastic cells of homozygous mutant mice were lower than those of +/? mice, and exogenous PTHrP treatment corrected this suppression. Immunohistochemical localization of characteristic markers of osteoclasts and ruffled border formation did not differ between genotypes. Cocultures of calvarial osteoblastic cells and spleen cells of homozygous mutant mice generated an equivalent number of tartrate-resistant acid phosphatase-positive (TRAP+) mononuclear and multinucleated cells and of pit formation to that of +/? mice, suggesting that osteoclast differentiation is not impaired in the homozygous mutant mice. These results suggest that PTHrP is required not only for the regulation of cartilage formation but also for the normal intramembranous bone development.
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Affiliation(s)
- N Suda
- Department of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University, Japan
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22
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García-Rocha M, Roca A, De La Iglesia N, Baba O, Fernández-Novell JM, Ferrer JC, Guinovart JJ. Intracellular distribution of glycogen synthase and glycogen in primary cultured rat hepatocytes. Biochem J 2001; 357:17-24. [PMID: 11415431 PMCID: PMC1221923 DOI: 10.1042/0264-6021:3570017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Changes in the intracellular distribution of liver glycogen synthase (GS) might constitute a new regulatory mechanism for the activity of this enzyme at cellular level. Our previous studies indicated that incubation of isolated hepatocytes with glucose activated GS and resulted in its translocation from a homogeneous cytosolic distribution to the cell periphery. These studies also suggested a relationship with insoluble elements of the cytoskeleton, in particular actin. Here we show the translocation of GS in a different experimental model that allows the analysis of this phenomenon in long-term studies. We describe the reversibility of translocation of GS and its effect on glycogen distribution. Incubation of cultured rat hepatocytes with glucose activated GS and triggered its translocation to the hepatocyte periphery. The relative amount of the enzyme concentrated near the plasma membrane increased with time up to 8 h of incubation with glucose, when the glycogen stores reached their maximal value. The lithium-induced covalent activation of GS was not sufficient to cause its translocation to the cell periphery. The intracellular distribution of GS closely resembled that of glycogen. Our results showed an interaction between GS and an insoluble element of the hepatocyte matrix. Although no co-localization between actin filaments and GS was observed in any condition, disruption of actin cytoskeleton resulted in a significantly lower percentage of cells in which the enzyme translocated to the cell periphery in response to glucose. This observation suggests that the microfilament network has a role in the translocation of GS.
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Affiliation(s)
- M García-Rocha
- Departament de Bioquímica i Biologia Molecular, Universitat de Barcelona, Martí i Franquès 1, 7a planta, E-08028 Barcelona, Spain
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23
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Abstract
The distribution of matrix vesicles and its role in biological mineralization were examined in bone and dental hard tissues of the rat after daily administrations of 1-hydroxyethylidene-1, 1-bisphosphonate (HEBP), a potent inhibitor of mineralization, for 7 or 14 days. Newly formed, nonmineralized matrices of the HEBP-affected bone and mesodermal dental hard tissues other than circumpulpal dentin contained numerous mineral-filled matrix vesicles (MV), randomly distributed throughout the collagenous matrix. The distribution density of the mineral-filled MV in the HEBP-affected matrices of calvaria, metaphyseal trabecular bone, alveolar bone, and cellular cementum ranged from 60 to 70 per 100 microm(2), and no statistically significant differences were noted among the values. In the HEBP-affected dentin, however, MV were located only in the nonmineralized matrix of mantle dentin and totally absent in the circumpulpal dentin layers. Instead, the HEBP-affected circumpulpal dentin contained a dense meshwork of noncollagenous matrix enriched with calcium and phosphorus. Comparable meshwork structures were undetectable in nonmineralized matrices of the other hard tissues affected by HEBP. These observations suggest that a certain population of MV (60-70 per 100 microm(2)) is involved in the process of appositional mineralization in most of the mesodermal hard tissues, in addition to their well-known role in initial mineral induction in these tissues. Circumpulpal dentin appears to be an exception, where MV are not required for the appositional mineralization process. Exclusive localization of dentin phosphoproteins in circumpulpal dentin layers must take place to facilitate appositional mineralization at the calcification front, in the absence of MV.
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Affiliation(s)
- Y Takano
- Department of Oral Anatomy II, Faculty of Dentistry, Tokyo Medical and Dental University, Tokyo, Japan.
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24
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Takano Y, Sakai H, Baba O, Sakamoto Y, Terashima T, Ohya K, Kurosaki N. Demonstration of putative Ca-binding domains in dentin matrix of rat incisors after daily injections of 1-hydroxyethylidene-1,1-bisphosphonate (HEBP). Eur J Oral Sci 1998; 106 Suppl 1:274-81. [PMID: 9541237 DOI: 10.1111/j.1600-0722.1998.tb02187.x] [Citation(s) in RCA: 17] [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: 02/07/2023]
Abstract
In order to clarify the initial process of dentin mineralization, the inhibitory effect of 1-hydroxyethylidene-1,1-bisphosphonate (HEBP) on dentin mineralization was investigated. Rats (100 g) were subcutaneously injected with HEBP (8 mg P/kg) for 7 or 14 d, and the incisors were processed for Ca histochemistry and/or electron microscopy. HEBP-treated incisors demonstrated ladder-like alternate rows of mineralized and non-mineralized dentin at the apical end. GBHA revealed moderate Ca reactions in the non-mineralized circumpulpal dentin matrix where electron microscopy revealed rich distribution of fine mesh-like electron-dense material. Non-mineralized mantle dentin matrix was negative for Ca but contained numerous matrix vesicles (MVs) filled with crystalline and/or amorphous mineral deposits. Mineralization of circumpulpal dentin occurred independently of MV-rich mantle dentin layer in affected specimens. Our data provide histochemical evidence of possible Ca-binding property of the circumpulpal dentin matrix and its absence in the mantle dentin where MV-mediated mineralization occurs. In the mantle dentin, HEBP does not interfere with crystal growth in MVs but inhibits its outgrowth after membrane rupture. It is proposed that circumpulpal dentin matrix has a potential to mineralize independently of MV-mediated mineralization of mantle dentin, although MVs determine the initial site and timing of dentin mineralization.
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Affiliation(s)
- Y Takano
- Department of Oral Anatomy, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.
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25
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Kitazawa M, Baba O, Yamamoto A, Fujiyama Y, Bamba T. [A case of pancreatic pseudocyst with hematemesis by fenestration into the stomach and hemosuccus pancreaticus]. Nihon Shokakibyo Gakkai Zasshi 1997; 94:508-12. [PMID: 9277117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- M Kitazawa
- Department of Internal Medicine, Minakuchi Municipal Hospital
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26
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Iimura T, Baba O, Maruoka Y, Takeda K, Sasaki S, Shimokawa H, Oida S. Homeobox gene expression during bone formation induced by BMP. Ann N Y Acad Sci 1996; 785:274-7. [PMID: 8702153 DOI: 10.1111/j.1749-6632.1996.tb56282.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- T Iimura
- Department of Biochemistry, Faculty of Dentistry, Tokyo Medical and Dental University, Japan
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27
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Abstract
In this study, I made a monoclonal antibody, using the mandibular condylar cartilage as antigen. By light microscopic immunocytochemical observations, this antibody reacted with the chondrocytes both in the mandibular condyle and the costal cartilage, hepatocytes and skeletal muscle cells. By electron microscopic immunocytochemical observations, reaction products (gold particles) were seen on the glycogen particles in the chondrocytes. Further, by dot blotting assay, this antibody was found to react directly with the purified glycogen. Meanwhile, all these reactions disappeared after alpha-amylase digestion. These results indicate that this antibody specifically recognizes glycogen or glycogen-related sugar chains. Therefore, I think that this antibody is very much useful for detecting the glycogen instead of the PAS reaction, since PAS reaction is not a specific method to detect the glycogen.
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Affiliation(s)
- O Baba
- Department of Oral Anatomy, Faculty of Dentistry, Tokyo Medical and Dental University
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28
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Kitazawa M, Nakagawa M, Baba O, Sumiyoshi K, Saito Y, Nishimura T, Bamba T, Hosoda S. [A case of amylase producing lung cancer]. Kokyu To Junkan 1993; 41:393-6. [PMID: 7685922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The patient was a 72-year-old man, who was admitted to our hospital because of cough. Chest X-rays showed a mass shadow in the right lower lung field. Amylase activities in serum and urine were extremely high. Amylase isozyme pattern identified salivary type amylase. Cytological examination of the sputum suggested adenocarcinoma. Amylase activities in serum and urine gradually decreased with the administration of chemotherapy. Afterwards, pleural effusion increased, and the amylase activity in pleural fluid was also extremely high. Pleural fluid also showed adenocarcinoma. Enzyme-labeled antibody method (PAP) on this specimen from pleural fluid proved that tumor cells were producing amylase ectopically.
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Affiliation(s)
- M Kitazawa
- Department of Internal Medicine, Kohga Public Hospital
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29
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Saito Y, Nakagawa M, Baba O, Sumiyoshi K, Kitazawa M, Koutake H, Sakamoto T, Kitou K, Koyama S, Fujiyama Y. [An autopsy case of gas-containing liver abscess with pneumatosis cystoides intestinalis]. Nihon Shokakibyo Gakkai Zasshi 1993; 90:715-9. [PMID: 8515587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Y Saito
- Department of Gastroenterology, Kohga Hospital
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30
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Shibata S, Baba O, Niikura M, Suzuki S, Yamashita Y, Ichijo T. An ultrastructural study of mitotic chondrocytes in the proliferative zone of the rat tibial growth plate. Ann Anat 1993; 175:41-5. [PMID: 8465973 DOI: 10.1016/s0940-9602(11)80235-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Mitotic chondrocytes containing fairly prominent cell organelles were observed in the proliferative zone of the rat tibial growth plate by electron microscopy. During the later stage of mitosis, the endoplasmic reticulum was mostly vacuolated, and the Golgi stacks were replaced by spherical and cylindrical vacuoles and small vesicles. The cytoplasmic division began at early telophase. However, the cytoplasmic cleavage furrow was so narrow that dividing chondrocytes looked as if they were partitioned by a slit. This is probably one reason for the appearance of the binuclear cells that are occasionally observed in the tibial growth plate.
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Affiliation(s)
- S Shibata
- Department of Oral Anatomy, School of Dentistry, Tokyo Medical and Dental University, Japan
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31
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Abstract
In this study, we observed mitotic preosteoblasts that have the structural features of osteoblasts in the primary spongiosa of the rat mandibular condyle. The rough endoplasmic reticulum and the Golgi apparatus showed remarkable disorganization during mitosis. The Golgi saccules were replaced by groups of large vacuoles and small vesicles. The cisternae of the rough endoplasmic reticulum also were vacuolized. Since this disorganization occurred in conjunction with the formation of the mitotic spindle, it is probably related to the changes of the microtubular cytoskeleton. Further, secretory granules were arrayed along the mitotic spindle microtubules at the metaphase, and concentrated around the midbody at the telophase. These findings indicate a close relationship exists between secretory granules and microtubules.
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Affiliation(s)
- S Shibata
- Department of Oral Anatomy, School of Dentistry, Tokyo Medical and Dental University, Japan
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32
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Shibata S, Baba O, Ohsako M, Suzuki S, Yamashita Y, Ichijo T. Ultrastructural observation on matrix fibers in the condylar cartilage of the adult rat mandible. Bull Tokyo Med Dent Univ 1991; 38:53-61. [PMID: 1764761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In this study, ultrastructural and immunohistochemical studies were performed on the adult rat (15 weeks old) mandibular condyle, with particular attention to the matrix fibers in the condylar cartilage. The fibrous zone had thick collagen fibrils which formed fibril bundles. These collagen fibrils consisted mainly of Type I collagen. From the proliferative zone to the mature zone, the density of the collagen fibrils became higher. In the hypertrophic zone, thick collagen fibrils were formed around the chondrocytes. Immunohistochemical study indicated that these collagen fibrils consisted mainly of Type I collagen. Therefore, it was confirmed that the hypertrophic chondrocytes in this tissue had one of the osteoblastic phenotypes.
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Affiliation(s)
- S Shibata
- 2nd Department of Oral Anatomy, Faculty of Dentistry, Tokyo Medical and Dental University
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33
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Shibata S, Baba O, Ohsako M, Shikano S, Terashima T, Yamashita Y, Ichijo T. Histological observation of large light cells that seem to be surviving hypertrophic chondrocytes in the rat mandibular condyle. Arch Oral Biol 1991; 36:541-4. [PMID: 1776929 DOI: 10.1016/0003-9969(91)90149-o] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Large light cells (more than 20 microns dia), including some with mitotic figures, appeared to be surviving hypertrophic chondrocytes. Thus at least a few hypertrophic chondrocytes in the rat mandibular condyle may survive, be released into the primary spongiosa, and divide.
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Affiliation(s)
- S Shibata
- Department of Oral Anatomy, School of Dentistry, Tokyo Medical and Dental University, Japan
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34
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Fukui H, Baba O, Akiyama K, Otsuki S, Takata M, Okuma H. A case of hypogonadotropic eunuchoidism associated with familiar periodic paralysis--induction of paralytic attacks by testosterone administration. Folia Psychiatr Neurol Jpn 1979; 33:541-6. [PMID: 535836 DOI: 10.1111/j.1440-1819.1979.tb03193.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A case report was made of a 24-year-old man suffering from hypogonadotropic eunuchoidism associated with a hypokalemic type of familiar periodic paralysis. The attacks were observed only during the period of continual administration of the oil solution of 115.7 mg of testosterone enanthate and 20.0 mg of testosterone propionate, intramuscularly as a depot. From the findings on this patient, it was concluded that testosterone might possibly play a role in the occurrence of attacks in the case of periodic paralysis.
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35
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Fujiwara J, Ishino H, Baba O, Hanaoka M, Sasaki K. Effect of flupenthixol on depression with special reference to combination use with tricyclic antidepressants. An uncontrolled pilot study with 45 patients. Acta Psychiatr Scand 1976; 54:99-105. [PMID: 961463 DOI: 10.1111/j.1600-0447.1976.tb00101.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In an open, uncontrolled trial flupenthixol was administered to 45 patients with endogenous depression. The drug was markedly effective in eight patients, effective in nine patients, fairly effective in 12 patients, and ineffective or aggravating in 16 patients. Four patients showed transient manic symptoms. Dosage was 1-3 mg daily. In 36 patients flupenthixol was used in combination with previously administered tricyclic antidepressants, and in nine patients it was used alone. Clinical effect was quickly apparent. It appeared within 1 week in 63% and within 2 weeks in 93% of subjects. Side-effects were observed in 13 patients: insomnia, five patients; slight extrapyramidal symptoms, nine patients. Sedative-hypnogenic effects were rarely seen. In 71% of 17 patients in whom the drug was found to be markedly effective or effective, flupenthixol's influence on psychomotor retardation was particularly striking. Other clear benefits were relief of depressive mood, psychic anxiety, and agitation. It is recommended that flupenthixol is given, as supplementary medication, to patients (1) whose depressive symptoms other than psychomotor retardation have already improved with current tricyclic antidepressants, and (2) in whom, before antidepressant medication, psychomotor retardation is a principal feature.
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36
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Ikeda H, Baba O, Ishino H. [L-dopa induced psychosis-dyskinesia complex]. No To Shinkei 1972; 14:275-80. [PMID: 5067044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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37
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Kumashiro H, Sato M, Hirata J, Baba O, Otsuki S. "Sleep apnoea" and sleep regulating mechanism. A case effectively treated with monochlorimipramine. Folia Psychiatr Neurol Jpn 1971; 25:41-9. [PMID: 5109814 DOI: 10.1111/j.1440-1819.1971.tb01487.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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38
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Sato M, Hirata J, Baba O, Kumashiro H, Otsuki S. [The electroencephalographic changes of systemic lupus erythematosus with psychotic state--a study of clinical significance of photomyoclonic response]. Seishin Shinkeigaku Zasshi 1970; 72:923-37. [PMID: 5531655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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