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Soriano-Romaní L, Mir FA, Singh N, Chin I, Hafezi-Moghadam A, Masli S. CD47 Binding on Vascular Endothelial Cells Inhibits IL-17-Mediated Leukocyte Adhesion. Int J Mol Sci 2022; 23:5705. [PMID: 35628515 PMCID: PMC9146020 DOI: 10.3390/ijms23105705] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/12/2022] [Accepted: 05/18/2022] [Indexed: 02/01/2023] Open
Abstract
To address the conflicting role of thrombospondin (TSP)-1 reported in acute and chronic pathologies, this study investigated the role of TSP-1 in regulating leukocyte recruitment and regulation of VCAM-1 expression using mouse models of uveitis. The spontaneously increased VCAM-1 expression and leukocyte adhesion in retinas of TSP-1-deficient mice suggested a TSP-1-mediated regulation of VCAM-1 expression. In a chronic uveitis model, induced by immunizing wild-type mice with specific interphotoreceptor retinoid-binding protein (IRBP) peptide, topically applied TSP-1-derived CD47-binding peptide significantly reduced the clinical disease course and retinal leukocyte adhesion as compared to the control peptide-treated group. In contrast, in LPS-mediated acute uveitis, TSP-1 deficiency significantly reduced the retinal leukocyte adhesion. The results of our in vitro study, using vascular endothelial cell (EC) cultures, demonstrate that unlike TNF-α, VCAM-1 expression induced by IL-17 is associated with a reduced expression of endogenous TSP-1. Such reduced endogenous TSP-1 expression in IL-17-stimulated ECs helps limit the CD36-mediated increased VCAM-1 expression, while favoring CD47-mediated inhibition of VCAM-1 expression and leukocyte adhesion. Thus, our study identifies TSP-1:CD47 interaction as a molecular pathway that modulates IL-17-mediated VCAM-1 expression, contributing to its anti-inflammatory effect in chronic inflammatory conditions.
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Affiliation(s)
- Laura Soriano-Romaní
- Ocular Surface Group, IOBA—University of Valladolid, Paseo de Belén 17, 47011 Valladolid, Spain;
- Department of Ophthalmology, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA; (F.A.M.); (N.S.); (I.C.)
| | - Fayaz A. Mir
- Department of Ophthalmology, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA; (F.A.M.); (N.S.); (I.C.)
| | - Niharika Singh
- Department of Ophthalmology, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA; (F.A.M.); (N.S.); (I.C.)
| | - Ian Chin
- Department of Ophthalmology, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA; (F.A.M.); (N.S.); (I.C.)
| | - Ali Hafezi-Moghadam
- Molecular Biomarkers Nano-Imaging Laboratory (MBNI), Brigham and Women’s Hospital and Department of Radiology, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA;
| | - Sharmila Masli
- Department of Ophthalmology, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA; (F.A.M.); (N.S.); (I.C.)
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Chin I, Hool L, Choi Y. Interrogating Gradient Hydrogels for Studying Cardiac Muscle Mechanobiology. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Li W, Chen Z, Chin I, Chen Z, Dai H. The Role of VE-cadherin in Blood-brain Barrier Integrity Under Central Nervous System Pathological Conditions. Curr Neuropharmacol 2018; 16:1375-1384. [PMID: 29473514 PMCID: PMC6251046 DOI: 10.2174/1570159x16666180222164809] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/17/2017] [Accepted: 02/22/2018] [Indexed: 12/31/2022] Open
Abstract
The blood-brain barrier (BBB) is a layer between the blood circulation and neural tissue. It plays a pivotal role in maintaining the vulnerable extracellular microenvironment in the neuronal parenchyma. Neuroinflammatory events can result in BBB dysregulation by disturbing adherens junctions (AJs) and tight junctions (TJs). VE-cadherin, as one of the most im-portant components of the vascular system, is specifically responsible for the assembly of AJs and BBB architecture. Here, we present a review, which highlights recently available insights into the relationship between the neuroinflammation and BBB dysregulation. We then explore the specific interaction between VE-cadherin and BBB. Fi-nally, we discuss the changes of VE-cadherin with different neurological diseases from both experimental and clinical stud-ies. An understanding of VE-cadherin in BBB regulation may indicate that VE-cadherin can partially be a biomarker of neu-roinflammation disease and lead to novel approaches for abating BBB dysregulation under pathological conditions and the opening of the BBB following central nervous system (CNS) drug delivery.
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Affiliation(s)
- Wenlu Li
- Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, Zhejiang, China.,Department of Pharmacology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Zhigang Chen
- Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, Zhejiang, China
| | - Ian Chin
- Metcalf Science Center, Boston University, Boston, MA 02215, United States
| | - Zhong Chen
- Department of Pharmacology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Haibin Dai
- Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, Zhejiang, China
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Singh N, Chin I, Gabriel P, Blaum E, Masli S. Dysregulated Marginal Zone B Cell Compartment in a Mouse Model of Sjögren's Syndrome with Ocular Inflammation. Int J Mol Sci 2018; 19:ijms19103117. [PMID: 30314337 PMCID: PMC6213455 DOI: 10.3390/ijms19103117] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 09/24/2018] [Accepted: 10/05/2018] [Indexed: 12/23/2022] Open
Abstract
The risk of developing lymphoma in patients with Sjögren’s syndrome (SS) is 44 times higher than in the normal population with the most common lymphomas derived from marginal zone B (MZB) cells. Current understanding of the role of MZB cells in SS is primarily based on salivary gland pathology, while their contextual association with lacrimal glands and ocular manifestations largely remains unknown. We examined this possibility using a SS mouse model (thrombospondin-1 deficient (TSP1−/−)) with well-characterized ocular disease. We determined the frequency, localization, and cytokine profiles of MZB cells and their association with an antibody response in TSP1−/− mice treated with a TSP-derived peptide. A significantly increased frequency of MZB cells was detected in the spleens and lacrimal glands of TSP1−/− mice in comparison to wild-type tissues as detected by immunostaining. An altered cytokine profile of TSP1−/− MZB cells was supportive of T helper 17 (Th17)-related pathogenesis. A significantly reduced antibody response and the splenic MZB compartment against an eye-derived antigen were noted in TSP-derived peptide-treated mice. These changes correspond with the previously reported ability of the peptide to ameliorate SS-related ocular manifestations. Collectively, our results demonstrate dysregulation of MZB cells in TSP1−/− mice and highlight their role in the context of SS-related chronic ocular surface disease.
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Affiliation(s)
- Niharika Singh
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA 02118, USA.
| | - Ian Chin
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA 02118, USA.
| | - Paul Gabriel
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA 02118, USA.
| | - Emily Blaum
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA 02118, USA.
| | - Sharmila Masli
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA 02118, USA.
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Yu Z, Lin L, Jiang Y, Chin I, Wang X, Li X, Lo EH, Wang X. Recombinant FGF21 Protects Against Blood-Brain Barrier Leakage Through Nrf2 Upregulation in Type 2 Diabetes Mice. Mol Neurobiol 2018; 56:2314-2327. [PMID: 30022432 DOI: 10.1007/s12035-018-1234-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 07/10/2018] [Indexed: 01/02/2023]
Abstract
Blood-brain barrier (BBB) damage is a characteristic feature of diabetes mellitus pathology and plays significant roles in diabetes-associated neurological disorders. However, effective treatments for diabetes targeting BBB damage are yet to be developed. Fibroblast growth factor 21 (FGF21) is a potent regulator of lipid and glucose metabolism. In this study, we tested the hypothesis that recombinant FGF21 (rFGF21) administration may reduce type 2 diabetes (T2D)-induced BBB disruption via NF-E2-related factor-2 (Nrf2) upregulation. Our experimental results show that rFGF21 treatment significantly ameliorated BBB permeability and preserved junction protein expression in db/db mice in vivo. This protective effect was further confirmed by ameliorated transendothelial permeability and junction protein loss by rFGF21 under hyperglycemia and IL1β (HG-IL1β) condition in cultured human brain microvascular endothelial cells (HBMEC) in vitro. We further reveal that rFGF21 can activate FGF receptor 1 (FGFR1) that increases its binding with Kelch ECH-associating protein 1 (Keap1), a repressor of Nrf2, thereby reducing Keap1-Nrf2 interaction leading to Nrf2 release. These data suggest that rFGF21 administration may decrease T2D-induced BBB permeability, at least in part via FGFR1-Keap1-Nrf2 activation pathway. This study may provide an impetus for development of therapeutics targeting BBB damage in diabetes.
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Affiliation(s)
- Zhanyang Yu
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, 149 13th Street, Room 2401, Boston, MA, 02129, USA.
| | - Li Lin
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Yinghua Jiang
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, 149 13th Street, Room 2401, Boston, MA, 02129, USA
| | - Ian Chin
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, 149 13th Street, Room 2401, Boston, MA, 02129, USA
| | - Xiaojie Wang
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Xiaokun Li
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Eng H Lo
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, 149 13th Street, Room 2401, Boston, MA, 02129, USA
| | - Xiaoying Wang
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, 149 13th Street, Room 2401, Boston, MA, 02129, USA.
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Abstract
This paper shows two types of microcapsules used for electrophoretic display. One is prepared by in-situ polymerization which is based on urea, melamine and formaldehyde and another by complex coacervation, which is composed of gelatin and gum Arabic. Microcapsules attract interests of many research groups for longer lifetime of electrophoretic display by reducing agglomerization or lateral movements of nanoparticles. The gelatin microcapsules were more attractive in providing more uniform microcapsule coverage on electrodes due to their flexibility as compared to the melamine-urea microcapsules. The properties of microcapsules were characterized by FTIR, OM, SEM and TGA. Migration of nanoparticles in the two types of microcapsules was also observed when an electric field was applied.
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Affiliation(s)
- J K Song
- Department of Polymer Science and Engineering, Inha University, Incheon, Korea
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Affiliation(s)
- B. J. Park
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - J. H. Sung
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - K. S. Kim
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - I. Chin
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - H. J. Choi
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
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Lim SK, Lim ST, Kim HB, Chin I, Choi HJ. Preparation and Physical Characterization of Polyepichlorohydrin Elastomer/Clay Nanocomposites. J MACROMOL SCI B 2006. [DOI: 10.1081/mb-120024814] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- S. K. Lim
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - S. T. Lim
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - H. B. Kim
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - I. Chin
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
| | - H. J. Choi
- a Department of Polymer Science and Engineering , Inha University , Incheon, Korea
- b Department of Polymer Science and Engineering , Inha University , Incheon, 402-751, Korea
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Abstract
BACKGROUND/PURPOSE The purpose of this study was to compare our initial (1994-1997) and recent (2001-2003) experiences in laparoscopic appendectomy (LA). METHODS A 2-year (2001-2003) retrospective chart review of cases of appendicitis was performed and compared with data obtained from 1994 to 1997 cases. Operating and anesthetic times as well as postoperative outcomes were analyzed. Cases of conversion to open appendectomy were included in the analysis. RESULTS Two hundred and thirty-three LA cases from 2001 to 2003 were compared with 119 cases from 1994 to 1997. Operating time decreased significantly from 58 to 47 minutes in acute appendicitis (AA) and from 80 to 58 minutes in perforated appendicitis (PA). Anesthetic time decreased significantly in both AA (82 to 71 minutes) and PA (106 to 84 minutes). There were significant decreases in the conversion rate in PA (23.4% to 3.5%), although no change was seen in AA. In PA, the incidence of postoperative abscess decreased from 36.2% to 16.5%. There was no significant decrease in length of stay, amount of analgesia used, time to resume regular diet, or incidence of wound infections and bowel obstructions. CONCLUSIONS Ten years of experience in LA has resulted in decreases in anesthetic and operating times for AA and PA as well as decreases in the incidence of abscesses and conversion rates.
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Affiliation(s)
- Stephanie Phillips
- Division of Pediatric Surgery, McMaster Children's Hospital, Hamilton, Ontario, Canada L8N 3Z5
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D'Arbe M, Chin I, Einstein R, Lavidis NA. Stress induced changes in transmitter release from sympathetic varicosities of the mouse vas deferens. J Auton Nerv Syst 1999; 76:146-52. [PMID: 10412838 DOI: 10.1016/s0165-1838(99)00022-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Activation of the sympathetic nervous system is an important component of the response to stress, but the effects of prolonged stress on sympathetic neurotransmission have not been assessed. In the present study we have examined the effect of 3 to 10 days exposure to stress induced by frequent handling and sham injections on neurotransmitter release from sympathetic varicosities of the mouse vas deferens. DiOC2(5)-fluorescence was used to visualise the sympathetic varicosities so that extracellular electrodes could be placed over known numbers of varicosities to monitor transmitter release using electrophysiological techniques. The frequency of excitatory junction currents (EJCs) increased with increasing duration of exposure to stress. The mean and maximum EJC amplitude significantly increased by 107% and 43%, respectively after 10 days of exposure to stress. The density of sympathetic varicosities innervating smooth muscle of the mouse vas deferens was not changed throughout the duration of the exposure to stress. The findings from this study demonstrate that the efficacy of transmitter release from the sympathetic varicosities is altered by repeated exposure of mice to stressful stimuli, such as handling and sham injections. Since such procedures are routine in many pharmacological experiments, it is important that investigators are aware of these changes so that due consideration is given when interpreting the data obtained from animals treated in this way.
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Affiliation(s)
- M D'Arbe
- Department of Physiology and Pharmacology, The University of Queensland, Brisbane, Australia
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Lowenguth RA, Chin I, Caton JG, Cobb CM, Drisko CL, Killoy WJ, Michalowicz BS, Pihlstrom BL, Goodson JM. Evaluation of periodontal treatments using controlled-release tetracycline fibers: microbiological response. J Periodontol 1995; 66:700-7. [PMID: 7473013 DOI: 10.1902/jop.1995.66.8.700] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In a 12-month multi-center study of 116 adult periodontitis subjects, six putative periodontal pathogens were monitored by DNA probe methods in a subset of 31 subjects. Monitored species included Porphyromonas gingivalis (Pg), Prevotella intermedia (Pi), Fusobacterium nucleatum (Fn), Eikenella corrodens (Ec), Campylobacter rectus (Cr), and Actinobacillus actinomycetemcomitans (Aa) with an average detection limit of 1.8 x 10(4) bacterial colony forming units/sample. The microbiological response to four periodontal treatments was studied, one treatment in each quadrant; scaling and root planing (S), scaling and root planing with tetracycline (TC) fiber (SF), a single application of TC fiber (F) and two serial applications of TC fiber (FF). Generally two sites were sampled in each quadrant, however, in some quadrants only one site was selected. These treatments were evaluated at baseline; immediately following therapy; and post-treatment at 1, 3, 6, and 12 months. The study was conducted with a split-mouth design with no maintenance therapy over a 12-month period. At baseline, 70.8% of sites had detectable Fn; 42.9% Pg; 63.5% Pi; 29.7% Ec; 28.3% Cr; and 5.5% Aa. No significant differences were seen in baseline proportions of these species between centers. Numbers and proportions of detectable pathogens (with the exception of Pg) exhibited a triphasic temporal response: a precipitous initial decrease immediately following therapy; a rise in proportions in the 1- to 3-month post-therapy period; and a spontaneous decline in the absence of therapy over the 3- to 12-month period.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- R A Lowenguth
- Eastman Dental Center, Department of Periodontology, Rochester, NY, USA
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Abstract
Mucosal oral therapeutic system (MOTS) is a controlled-release osmotic system for oral cavity therapy. MOTS (nystatin) is designed to deliver approximately 200,000 units of nystatin over several hours. A crossover study was conducted in five healthy volunteers to evaluate the amount of nystatin released (based on residual drug content) when the system is held in the mouth for 30 min, 1 h, and 2 h, and to compare these concentrations with those achieved with a Mycostatin (nystatin) pastille. An average of 37% of the nystatin content was released intra-orally from MOTS during 2 h in the mouth, which was very similar to the percentage delivered in vitro. Mean salivary drug concentrations were as follows: 279 micrograms.ml-1 at 30 min; 654 micrograms.ml-1 after 1 h; and 532 micrograms.ml-1 at 2 h. These concentrations consistently exceeded those produced by the pastille at the same time points. Fifteen minutes after placement of the pastille in the mouth (i.e., immediately after its dissolution) mean nystatin concentrations reached 746 micrograms.ml-1 but fell rapidly to 13.2 micrograms.ml-1 at 30 min, 7.2 micrograms.ml-1 at 1 h, and 5.6 micrograms.ml-1 at 2 h. The study demonstrates that MOTS maintains high salivary nystatin concentrations throughout a 2 h dosing interval.
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Abstract
An inert gas analysis method has been developed to perform on-line real time determination of pulmonary blood flow using a nonrebreathing approach. This technique is based on a mathematical model describing mass balance of two inert gases which are breathed using an open gas circuit. The measurements using this method are noninvasive, easy to peform, and do not disturb normal physiological processes. As well, since data are collected on a breath-by-breath basis, it is possible to estimate other respiratory, cardiopulmonary, and metabolic parameters simultaneously in a breath-by-breath manner. Special consideration was given to developing effective data processing algorithms to minimize the influence of measurement noise and respiratory variations. Experimental studies to compare this method with other accepted techniques were conducted to validate the present technique.
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Affiliation(s)
- K Gan
- Department of Medicine, Mount Sinai Hospital, University of Toronto, Canada
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Sasaki K, Glen Calderheadt R, Chin I, Inomata K. TO EXAMINE THE ADVERSE PHOTOTHERMAL EFFECTS OF EXTENDED DOSAGE LASER THERAPY IN VIVO ON THE SKIN AND SUBCUTANEOUS TISSUE IN THE RAT MODEL. Laser Ther 1992. [DOI: 10.5978/islsm.92-or-07] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Teplitsky PE, Rayner D, Chin I, Markowsky R. Gutta percha removal utilizing GPX instrumentation. J Can Dent Assoc 1992; 58:53-8. [PMID: 1544039] [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: 12/27/2022]
Abstract
Two studies were performed in order to test the efficiency of GPX rotary instrumentation in removing gutta percha from endodontically-treated extracted teeth. A pilot project compared GPX to gates glidden instrumentation, and then a GPX technique was performed on 60 obturated mesial canals of mandibular molars. Assessment of the technique included radiographic and microscopic analysis of remaining debris. Results indicated that the GPX is a useful adjunct in these retreatment procedures. The clinical technique and time involved in the use of the GPX are discussed.
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Affiliation(s)
- P E Teplitsky
- College of Dentistry, University of Saskatchewan, Saskatoon
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Abstract
We report a case of sudden fatal cardiac arrest in a 3-year-old boy. The arrest occurred when he was placed in the supine position by force for a venipuncture. Autopsy revealed a large anterior mediastinal mass. The death was attributed to the airway obstruction and cardiac compression by the mass. Postural change to supine position by force was believed to have triggered compression of the cardiopulmonary system by an unrecognized anterior mediastinal mass, resulting in cardiac arrest.
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Affiliation(s)
- M Yamashita
- Department of Anaesthesiology and Paediatrics, Ibaraki Children's Hospital, Mito, Japan
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Hirano T, Jogamoto M, Chin I. Syndrome of resistance to thyroid hormone in an infant with congenital cytomegalovirus infection. Acta Paediatr Jpn 1989; 31:504-8. [PMID: 2558491 DOI: 10.1111/j.1442-200x.1989.tb01342.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We describe an infant with congenital cytomegalovirus infection who developed the syndrome of resistance to thyroid hormone at three weeks of age, presenting with elevated thyroxine levels and non-suppressible thyroid-hormone-stimulating hormone secretions without any features of thyrotoxicosis. The resistance was present at the peripheral and pituitary levels and resolved spontaneously by 18 months of age. Cytomegalovirus infection was confirmed by the positive urine culture of this virus. This case demonstrates for the first time a possible association of thyroid hormone resistance with congenital cytomegalovirus infection.
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Abstract
We developed a formaldehyde delivery system for urine collection bags and evaluated its effectiveness in suppressing the growth of bacteria in simulated human urine. The system was composed of paraformaldehyde in a polymeric carrier. We determined that inoculation of small numbers of Escherichia coli and Pseudomonas aeruginosa in urinary bags with a continuous flow of synthetic urine (40-80 ml h-1) quickly gives rise to high levels of contamination. This single tablet delivery system, however, proved bacteriostatic or bactericidal for both organisms over the 10-day lifespan. The formaldehyde concentration in the synthetic urine was c. 90 micrograms ml-1 or more during tests.
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Affiliation(s)
- S Yum
- Alza Corporation, Palo Alto, CA 94304
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Cho N, Daito S, Sekiya M, Chin I, Fukunaga K, Kunii K. [Fundamental and clinical studies on fosfomycin sodium in the field of obstetrics and gynecology]. Jpn J Antibiot 1985; 38:2045-56. [PMID: 4078999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Fosfomycin sodium (FOM-Na) was studied both fundamentally and clinically in the field of obstetrics and gynecology with following results. It showed good transference into the uterine tissues when given intravenously. The peak concentrations achieved in the uterine tissues following intravenous administration of 2 g of FOM-Na were 26.56 to 53.48 micrograms/g when given as one shot injection and 20.16 to 39.47 micrograms/g as drip infusion. In the serum of vein and uterine artery, peak concentrations of 163.6 to 143.40 micrograms/ml and 120 to 113.12 micrograms/ml were reached following one shot injection and drip infusion, respectively. In general, FOM-Na concentrations in the uterine tissues showed similar changes as those observed for serum concentrations. Clinically, FOM-Na was used in the treatment of 17 cases of obstetrical and gynecological infections at 2 g per dose twice daily as intravenous drip infusions. In all of these cases, good clinical efficacy was obtained. No side effects were observed.
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Kaul A, Sung NH, Chin I, Sung CSP. Durability and failure analyses of a silane treated ?-Al2O3/polyethylene joint in wet environment. POLYM ENG SCI 1984. [DOI: 10.1002/pen.760240708] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sung NH, Kaul A, Chin I, Sung CSP. Mechanistic studies of adhesion promotion by ?-aminopropyl triethoxy silane in ?-Al2O3/polyethylene joint. POLYM ENG SCI 1982. [DOI: 10.1002/pen.760221008] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Komi N, Takahashi K, Tokkyu T, Suzuki N, Chin I. [Problems in diaphragmatic eventration, with special reference to emergency surgery of a newborn infant with aberrant lung tissue into the diaphragm and high ectopic kidney]. Shujutsu 1971; 25:259-272. [PMID: 5555098] [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: 05/21/2023]
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Shimura H, Nakamura K, Kuba K, Tamura H, Chin I. [Causative bacteria in postoperative infections of laparotomy and their antibiotic sensitivities]. J Antibiot B 1967; 20:156-7. [PMID: 5299158] [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: 01/14/2023]
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