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Abduljalil SMA, Hashim NT, Rahman MM, Chaitanya NC, Mukhtar MM, Gismalla BG. Soluble Receptor Activator of Nuclear Factor Ligand and Osteoprotegerin Levels in Gingival Crevicular Fluid among Cigarette Smokers and Non-smokers with and without Periodontitis. J Contemp Dent Pract 2023; 24:771-778. [PMID: 38152910 DOI: 10.5005/jp-journals-10024-3580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
AIM This study aimed to measure and compare the levels of soluble receptor activator of nuclear factor ligand (RANKL) and osteoprotegerin (OPG) in the gingival crevicular fluid (GCF), as well as their ratio, in smokers and nonsmokers with periodontitis. MATERIALS AND METHODS Gingival crevicular fluid samples were collected using PerioPaper strips, from 150 individuals, who were categorized into three groups: current smokers with periodontitis stage III grades C and B (n = 50), nonsmokers with periodontitis stages I and II grade A (n = 50), and control healthy individuals (n = 50). The concentrations (pg/mL) of sRANKL and OPG in the GCF were measured by enzyme-linked immunesorbent assays (ELISA). RESULT The smokers' group exhibited the highest sRANKL (pg/mL) concentration as a subsequent lead to a higher sRANKL/OPG ratio. The healthy control group exhibited higher OPG and lower sRANKL concentration, subsequently, the sRANKL/OPG ratio was reduced compared with the other study groups. However, there was no statistical significance of sRANKL and its relative ratio between periodontitis stage III grades C and B, periodontitis stages I and II grade A, and healthy control individuals. There was a statistically significant positive moderate correlation between smoking duration (years) and the sRANKL (pg/mL) concentration and a statistically significant negative moderate correlation between OPG (pg/mL) concentration and cigarettes smoked per day. CONCLUSION As a result, compared to the other research groups, smokers with periodontitis stage III grades C and B had greater GCF concentrations of sRANKL, lower OPG, and a higher sRANKL/OPG ratio. The difference in OPG (pg/mL) level was statistically significant. However, there was no statistically significant difference in sRANKL (pg/mL) or its relative ratio, sRANKL/OPG, across the groups. CLINICAL SIGNIFICANCE A characteristic that sets periodontitis apart is alveolar bone loss. Resorption is induced by RANKL and inhibited by OPG, resulting in a relative ratio. In light of this, the levels of RANKL and OPG may be helpful indicators for monitoring the activity of periodontal disease in both smokers and nonsmokers with and without periodontitis.
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Affiliation(s)
| | - Nada Tawfig Hashim
- Department of Periodontics, RAK College of Dental Sciences, RAK Medical and Health Sciences University, Ras Al Khaimah, United Arab Emirates, Phone: +971 585267057, e-mail:
| | - Muhammed Mustahsen Rahman
- Department of Periodontics, RAK College of Dental Sciences, RAK Medical & Health Sciences University, Ras Al Khaimah, United Arab Emirates
| | - Nallan Csk Chaitanya
- Department of Oral Medicine and Radiology, RAK College of Dental Sciences, RAK Medical & Health Sciences University, Ras Al Khaimah, UAE
| | - Moawia Mohamed Mukhtar
- Department of Immunology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Bakri Gobara Gismalla
- Department of Oral Rehabilitation, Faculty of Dentistry, University of Khartoum, Khartoum, Sudan
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Kuan V, Warwick A, Hingorani A, Tufail A, Cipriani V, Burgess S, Sofat R. Association of Smoking, Alcohol Consumption, Blood Pressure, Body Mass Index, and Glycemic Risk Factors With Age-Related Macular Degeneration: A Mendelian Randomization Study. JAMA Ophthalmol 2021; 139:1299-1306. [PMID: 34734970 PMCID: PMC8569599 DOI: 10.1001/jamaophthalmol.2021.4601] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/20/2021] [Indexed: 12/13/2022]
Abstract
IMPORTANCE Advanced age-related macular degeneration (AMD) is a leading cause of blindness in Western countries. Causal, modifiable risk factors need to be identified to develop preventive measures for advanced AMD. OBJECTIVE To assess whether smoking, alcohol consumption, blood pressure, body mass index, and glycemic traits are associated with increased risk of advanced AMD. DESIGN, SETTING, PARTICIPANTS This study used 2-sample mendelian randomization. Genetic instruments composed of variants associated with risk factors at genome-wide significance (P < 5 × 10-8) were obtained from published genome-wide association studies. Summary-level statistics for these instruments were obtained for advanced AMD from the International AMD Genomics Consortium 2016 data set, which consisted of 16 144 individuals with AMD and 17 832 control individuals. Data were analyzed from July 2020 to September 2021. EXPOSURES Smoking initiation, smoking cessation, lifetime smoking, age at smoking initiation, alcoholic drinks per week, body mass index, systolic and diastolic blood pressure, type 2 diabetes, glycated hemoglobin, fasting glucose, and fasting insulin. MAIN OUTCOMES AND MEASURES Advanced AMD and its subtypes, geographic atrophy (GA), and neovascular AMD. RESULTS A 1-SD increase in logodds of genetically predicted smoking initiation was associated with higher risk of advanced AMD (odds ratio [OR], 1.26; 95% CI, 1.13-1.40; P < .001), while a 1-SD increase in logodds of genetically predicted smoking cessation (former vs current smoking) was associated with lower risk of advanced AMD (OR, 0.66; 95% CI, 0.50-0.87; P = .003). Genetically predicted increased lifetime smoking was associated with increased risk of advanced AMD (OR per 1-SD increase in lifetime smoking behavior, 1.32; 95% CI, 1.09-1.59; P = .004). Genetically predicted alcohol consumption was associated with higher risk of GA (OR per 1-SD increase of log-transformed alcoholic drinks per week, 2.70; 95% CI, 1.48-4.94; P = .001). There was insufficient evidence to suggest that genetically predicted blood pressure, body mass index, and glycemic traits were associated with advanced AMD. CONCLUSIONS AND RELEVANCE This study provides genetic evidence that increased alcohol intake may be a causal risk factor for GA. As there are currently no known treatments for GA, this finding has important public health implications. These results also support previous observational studies associating smoking behavior with risk of advanced AMD, thus reinforcing existing public health messages regarding the risk of blindness associated with smoking.
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Affiliation(s)
- Valerie Kuan
- Institute of Health Informatics, University College London, London, United Kingdom
- Health Data Research UK London, University College London, London, United Kingdom
- University College London British Heart Foundation Research Accelerator, London, United Kingdom
| | - Alasdair Warwick
- Institute of Cardiovascular Science, University College London, London, United Kingdom
- Moorfields Eye Hospital, London, United Kingdom
| | - Aroon Hingorani
- Health Data Research UK London, University College London, London, United Kingdom
- University College London British Heart Foundation Research Accelerator, London, United Kingdom
- Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Adnan Tufail
- Moorfields Eye Hospital, London, United Kingdom
- UCL Institute of Ophthalmology, University College London, London, United Kingdom
| | - Valentina Cipriani
- Moorfields Eye Hospital, London, United Kingdom
- UCL Institute of Ophthalmology, University College London, London, United Kingdom
- Clinical Pharmacology, William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
- UCL Genetics Institute, University College London, London, United Kingdom
| | - Stephen Burgess
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
- MRC Biostatistics Unit, University of Cambridge, Cambridge, United Kingdom
| | - Reecha Sofat
- Institute of Health Informatics, University College London, London, United Kingdom
- Health Data Research UK London, University College London, London, United Kingdom
- University College London British Heart Foundation Research Accelerator, London, United Kingdom
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Silva H. Tobacco Use and Periodontal Disease-The Role of Microvascular Dysfunction. BIOLOGY 2021; 10:441. [PMID: 34067557 PMCID: PMC8156280 DOI: 10.3390/biology10050441] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 05/05/2021] [Accepted: 05/07/2021] [Indexed: 12/30/2022]
Abstract
Periodontal disease consists in highly prevalent wide-ranging inflammatory conditions that affect the supporting apparatus of teeth. Tobacco use is the most important risk factor for periodontal disease as it increases disease severity and periodontal surgery complications. Tobacco use is harmful for the vasculature by causing microvascular dysfunction, which is known to negatively affect periodontal disease. To the author's knowledge this paper is the first comprehensive review on the mechanisms by which tobacco use affects oral microcirculation and impacts the pathophysiology of periodontal disease. In healthy subjects, acute nicotine administration or tobacco use (smoking/smokeless forms) increases the blood flow in the oral mucosa due to local irritation and increased blood pressure, which overcome neural- and endocrine-mediated vasoconstriction. Chronic tobacco smokers display an increased gingival microvascular density, which is attributed to an increased capillary recruitment, however, these microcirculatory units show higher tortuosity and lower caliber. These morphological changes, together with the repetitive vasoconstrictive insults, contribute to lower gingival perfusion in chronic smokers and do not completely regress upon smoking cessation. In periodontal disease there is considerable gingival inflammation and angiogenesis in non-smokers which, in chronic smokers, are considerably suppressed, in part due to local immune suppression and oxidative stress. Tobacco exposure, irrespective of the form of use, causes long-term microvascular dysfunction that increases the risk of complications due to the natural disease course or secondary therapeutic strategies.
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Affiliation(s)
- Henrique Silva
- Informetrics Research Group, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam;
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam
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Pugazhendhi A, Hubbell M, Jairam P, Ambati B. Neovascular Macular Degeneration: A Review of Etiology, Risk Factors, and Recent Advances in Research and Therapy. Int J Mol Sci 2021; 22:1170. [PMID: 33504013 PMCID: PMC7866170 DOI: 10.3390/ijms22031170] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/11/2021] [Accepted: 01/19/2021] [Indexed: 12/14/2022] Open
Abstract
Neovascular age-related macular degeneration (exudative or wet AMD) is a prevalent, progressive retinal degenerative macular disease that is characterized by neovascularization of the choroid, mainly affecting the elderly population causing gradual vision impairment. Risk factors such as age, race, genetics, iris color, smoking, drinking, BMI, and diet all play a part in nvAMD's progression, with anti-vascular endothelial growth factor (anti-VEGF) therapy being the mainstay of treatment. Current therapeutic advancements slow the progression of the disease but do not cure or reverse its course. Newer therapies such as gene therapies, Rho-kinase inhibitors, and levodopa offer potential new targets for treatment.
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Affiliation(s)
- Arunbalaji Pugazhendhi
- Knights Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR 97403, USA; (A.P.); (M.H.)
| | - Margaret Hubbell
- Knights Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR 97403, USA; (A.P.); (M.H.)
| | - Pooja Jairam
- Vagelos College of Physicians & Surgeons, Columbia Irving Medical Center, Columbia University, New York, NY 10032, USA;
| | - Balamurali Ambati
- Knights Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR 97403, USA; (A.P.); (M.H.)
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D'Souza JC, Kawut SM, Elkayam LR, Sheppard L, Thorne PS, Jacobs DR, Bluemke DA, Lima JAC, Kaufman JD, Larson TV, Adar SD. Ambient Coarse Particulate Matter and the Right Ventricle: The Multi-Ethnic Study of Atherosclerosis. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:077019. [PMID: 28760719 PMCID: PMC5744657 DOI: 10.1289/ehp658] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 02/24/2017] [Accepted: 03/16/2017] [Indexed: 05/24/2023]
Abstract
BACKGROUND Coarse particulate matter (P10-2.5) is primarily mechanically generated and includes crustal material, brake and tire wear, and biological particles. PM10-2.5 is associated with pulmonary disease, which can lead to right ventricular (RV) dysfunction. Although RV characteristics have been associated with combustion-related pollutants, relationships with PM10-2.5 remain unknown. OBJECTIVES To quantify cross-sectional associations between RV dysfunction and PM10-2.5 mass and components among older adults and susceptible populations. METHODS We used baseline cardiac magnetic resonance images from 1,490 participants (45-84 y old) from the Multi-Ethnic Study of Atherosclerosis and assigned 5-y residential concentrations of PM10-2.5 mass, copper, zinc, phosphorus, silicon, and endotoxin, using land-use regression models. We quantified associations with RV mass, end-diastolic volume, and ejection fraction after control for risk factors and copollutants using linear regression. We further examined personal susceptibility. RESULTS We found positive associations of RV mass and, to a lesser extent, end diastolic volume with PM10-2.5 mass among susceptible populations including smokers and persons with emphysema. After adjustment for copollutants, an interquartile range increase in PM10-2.5 mass (2.2 μg/m3) was associated with 0.5 g (95% CI: 0.0, 1.0), 0.9 g (95% CI: 0.1, 1.7), and 1.4 g (95% CI: 0.4, 2.5) larger RV mass among former smokers, current smokers, and persons with emphysema, respectively. No associations were found with healthy individuals or with ejection fraction. CONCLUSIONS Alterations to RV structure may represent a mechanism by which long-term PM10-2.5 exposure increases risks for adverse respiratory and cardiovascular outcomes, especially among certain susceptible populations. https://doi.org/10.1289/EHP658.
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Affiliation(s)
- Jennifer C D'Souza
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
| | - Steven M Kawut
- Department of Medicine, Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Laura R Elkayam
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
| | - Lianne Sheppard
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, Washington, USA
- Department of Biostatistics, School of Public Health, University of Washington, Seattle, Washington, USA
| | - Peter S Thorne
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, Iowa, USA
| | - David R Jacobs
- Department of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, Minnesota, USA
| | - David A Bluemke
- Radiology and Imaging Sciences, National Institute of Biomedical Imaging and Bioengineering, Bethesda, Maryland, USA
| | - Joao A C Lima
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Joel D Kaufman
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, Washington, USA
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington, USA
- Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA
| | - Timothy V Larson
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, Washington, USA
- Department of Civil and Environmental Engineering, University of Washington College of Engineering, Seattle, Washington, USA
| | - Sara D Adar
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
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Scanzi F, Andreoli L, Martinelli M, Taraborelli M, Cavazzana I, Carabellese N, Ottaviani R, Allegri F, Franceschini F, Agmon-Levin N, Shoenfeld Y, Tincani A. Are the autoimmune/inflammatory syndrome induced by adjuvants (ASIA) and the undifferentiated connective tissue disease (UCTD) related to each other? A case-control study of environmental exposures. Immunol Res 2017; 65:150-156. [DOI: 10.1007/s12026-017-8912-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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A case of ocular neuromyotonia caused by neurovascular compression of the oculomotor nerve by the elongated superior cerebellar artery. J Neurol 2016; 263:1236-8. [DOI: 10.1007/s00415-016-8117-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/02/2016] [Accepted: 04/04/2016] [Indexed: 10/21/2022]
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Sakamoto H, Matsushita S, Hyodo K, Tokunaga C, Sato F, Hiramatsu Y. A new technique of in vivo synchrotron radiation coronary microangiography in the rat. Acta Radiol 2015; 56:1105-7. [PMID: 25260415 DOI: 10.1177/0284185114549570] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 07/15/2014] [Indexed: 11/15/2022]
Abstract
BACKGROUND Previously, in our laboratory, synchrotron radiation coronary microangiography (SRCA) using Langendorff-perfused rat hearts could visualize a coronary artery of 50 µm in diameter. However, in vivo rat SRCA poses the problem of compromised temporal resolution due to the rapid heart rate of rats. PURPOSE To establish a simple method of in vivo rat SRCA with bradycardia induced by intravenous injection of adenosine triphosphate disodium hydrate (ATP). MATERIAL AND METHODS SRCA was performed at the Photon Factory of the High Energy Accelerator Research Organization (Tsukuba, Japan). Eight male Wistar rats were anesthetized. A catheter for injecting the contrast material was inserted into the carotid artery. Temporary bradycardia was induced by an intravenous bolus injection of 5 mg of ATP, and SRCA was performed immediately thereafter. RESULTS After ATP administration, the average heart rate decreased from 388 to 73 beats per minute. As a result, we could detect a coronary artery as small as 45 µm in diameter. CONCLUSION Our SRCA system which has a high resolution of 9 µm per pixel could detect a coronary artery as small as 45 µm in diameter in the in vivo rat.
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Affiliation(s)
- Hiroaki Sakamoto
- Department of Cardiovascular Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | | | - Kazuyuki Hyodo
- Photon Factory, High Energy Accelerator Research Organization, Tsukuba, Japan
| | - Chiho Tokunaga
- Department of Cardiovascular Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Fujio Sato
- Department of Cardiovascular Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yuji Hiramatsu
- Department of Cardiovascular Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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Umetani K, Fukushima K. X-ray intravital microscopy for functional imaging in rat hearts using synchrotron radiation coronary microangiography. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:034302. [PMID: 23556830 DOI: 10.1063/1.4795830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
An X-ray intravital microscopy technique was developed to enable in vivo visualization of the coronary, cerebral, and pulmonary arteries in rats without exposure of organs and with spatial resolution in the micrometer range and temporal resolution in the millisecond range. We have refined the system continually in terms of the spatial resolution and exposure time. X-rays transmitted through an object are detected by an X-ray direct-conversion type detector, which incorporates an X-ray SATICON pickup tube. The spatial resolution has been improved to 6 μm, yielding sharp images of small arteries. The exposure time has been shortened to around 2 ms using a new rotating-disk X-ray shutter, enabling imaging of beating rat hearts. Quantitative evaluations of the X-ray intravital microscopy technique were extracted from measurements of the smallest-detectable vessel size and detection of the vessel function. The smallest-diameter vessel viewed for measurements is determined primarily by the concentration of iodinated contrast material. The iodine concentration depends on the injection technique. We used ex vivo rat hearts under Langendorff perfusion for accurate evaluation. After the contrast agent is injected into the origin of the aorta in an isolated perfused rat heart, the contrast agent is delivered directly into the coronary arteries with minimum dilution. The vascular internal diameter response of coronary arterial circulation is analyzed to evaluate the vessel function. Small blood vessels of more than about 50 μm diameters were visualized clearly at heart rates of around 300 beats/min. Vasodilation compared to the control was observed quantitatively using drug manipulation. Furthermore, the apparent increase in the number of small vessels with diameters of less than about 50 μm was observed after the vasoactive agents increased the diameters of invisible small blood vessels to visible sizes. This technique is expected to offer the potential for direct investigation of mechanisms of vascular dysfunctions.
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Affiliation(s)
- K Umetani
- Japan Synchrotron Radiation Research Institute, SPring-8, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.
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Shirai M, Schwenke DO, Tsuchimochi H, Umetani K, Yagi N, Pearson JT. Synchrotron radiation imaging for advancing our understanding of cardiovascular function. Circ Res 2013; 112:209-21. [PMID: 23287456 DOI: 10.1161/circresaha.111.300096] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Synchrotron radiation (SR) is increasingly being used for micro-level and nano-level functional imaging in in vivo animal experiments. This review focuses on the methodology that enables repeated and regional assessment of vessel internal diameter and flow in the resistance vessels of different organ systems. In particular, SR absorption microangiography approaches offer unique opportunities for real-time in vivo vascular imaging in small animals, even during dynamic motion of the heart and lungs. We also describe recent progress in the translation of multiple phase-contrast imaging techniques from ex vivo to in vivo small-animal studies. Furthermore, we also review the utility of SR for multiple pinpoint (dimensions 0.2×0.2 mm) assessments of myocardial function at the cross-bridge level in different regions of the heart using small-angle X-ray scattering, resulting from increases in SR flux at modern facilities. Finally, we present cases for the use of complementary SR approaches to study cardiovascular function, particularly the pathological changes associated with disease using small-animal models.
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Affiliation(s)
- Mikiyasu Shirai
- National Cerebral and Cardiovascular Center Research Institute, Suita, Japan.
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Ramakrishnan S, Bhatt K, Dubey AK, Roy A, Singh S, Naik N, Seth S, Bhargava B. Acute electrocardiographic changes during smoking: an observational study. BMJ Open 2013; 3:bmjopen-2012-002486. [PMID: 23562816 PMCID: PMC3641479 DOI: 10.1136/bmjopen-2012-002486] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE To study the temporal relationship of smoking with electrophysiological changes. DESIGN Prospective observational study. SETTING Tertiary cardiac center. PARTICIPANTS Male smokers with atypical chest pain were screened with a treadmill exercise test (TMT). A total of 31 such patients aged 49.8±10.5 years, in whom TMT was either negative or mildly positive were included. Heart rate variability (HRV) parameters of smokers were compared to those of 15 healthy non-smoking participants. INTERVENTIONS All patients underwent a 24 h Holter monitoring to assess ECG changes during smoking periods. RESULTS Heart rate increased acutely during smoking. Mean heart rate increased from 83.8±13.7 bpm 10 min before smoking, to 90.5±16.4 bpm during smoking, (p<0.0001) and returned to baseline after 30 min. Smoking was also associated with increased ectopic beats (mean of 5.3/h prior to smoking to 9.8/h during smoking to 11.3/h during the hour after smoking; p<0.001). Three patients (9.7%) had significant ST-T changes after smoking. HRV index significantly decreased in smokers (15.2±5.3) as compared to non-smoking controls participants (19.4±3.6; p=0.02), but the other spectral HRV parameters were comparable. CONCLUSIONS Heart rate and ectopic beats increase acutely following smoking. Ischaemic ST-T changes were also detected during smoking. Spectral parameters of HRV analysis of smokers remained in normal limits, but more importantly geometrical parameter-HRV index-showed significant abnormality.
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Lu W, Dong Z, Liu Z, Fu W, Peng Y, Chen S, Xiao T, Xie H, Du G, Deng B, Zhang X. Detection of Microvasculature in Rat Hind Limb Using Synchrotron Radiation. J Surg Res 2010; 164:e193-9. [DOI: 10.1016/j.jss.2010.05.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 04/07/2010] [Accepted: 05/10/2010] [Indexed: 11/17/2022]
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Schültke E, Kelly ME, Nemoz C, Fiedler S, Ogieglo L, Crawford P, Paterson J, Beavis C, Esteve F, Brochard T, Renier M, Requardt H, Dallery D, Le Duc G, Meguro K. Dual energy CT at the synchrotron: a piglet model for neurovascular research. Eur J Radiol 2010; 79:323-7. [PMID: 20732772 DOI: 10.1016/j.ejrad.2010.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2009] [Accepted: 07/01/2010] [Indexed: 10/19/2022]
Abstract
BACKGROUND Although the quality of imaging techniques available for neurovascular angiography in the hospital environment has significantly improved over the last decades, the equipment used for clinical work is not always suited for neurovascular research in animal models. We have previously investigated the suitability of synchrotron-based K-edge digital subtraction angiography (KEDSA) after intravenous injection of iodinated contrast agent for neurovascular angiography in radiography mode in both rabbit and pig models. We now have used the KEDSA technique for the acquisition of three-dimensional images and dual energy CT. MATERIALS AND METHODS All experiments were conducted at the biomedical beamline ID 17 of the European Synchrotron Radiation Facility (ESRF). A solid state germanium (Ge) detector was used for the acquisition of image pairs at 33.0 and 33.3 keV. Three-dimensional images were reconstructed from an image series containing 60 single images taken throughout a full rotation of 360°. CT images were reconstructed from two half-acquisitions with 720 projections each. RESULTS The small detector field of view was a limiting factor in our experiments. Nevertheless, we were able to show that dual energy CT using the KEDSA technique available at ID 17 is suitable for neurovascular research in animal models.
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Chien CC, Wang CH, Wang CL, Li ER, Lee KH, Hwu Y, Lin CY, Chang SJ, Yang CS, Petibois C, Margaritondo G. Synchrotron microangiography studies of angiogenesis in mice with microemulsions and gold nanoparticles. Anal Bioanal Chem 2010; 397:2109-16. [DOI: 10.1007/s00216-010-3775-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2010] [Revised: 04/17/2010] [Accepted: 04/22/2010] [Indexed: 12/25/2022]
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Abstract
Failure of fracture fixation after plating often leads to challenging surgical revision situations. Careful analysis of all patient and fracture variables is helpful in both determining the causes of the fixation failure and maximizing the success of subsequent interventions. Biologic and mechanical factors must be considered. Biologic considerations include traumatic soft-tissue injury and atrophic fracture site. Common mechanical reasons for failure include malreduction, inadequate plate length or strength, and excessive or insufficient construct stiffness. Reliance on laterally based implants in the presence of medial comminution may be a cause of fixation failure and subsequent deformity, particularly with conventional nonlocking implants. Management of dead space with cement or beads has been effective in conjunction with staged approaches. An antibiotic cement rod in the diaphysis may provide fracture stabilization. Locking full-length constructs should be considered for osteoporotic fractures.
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Imazuru T, Matsushita S, Hyodo K, Tokunaga C, Kanemoto S, Enomoto Y, Watanabe Y, Hiramatsu Y, Sakakibara Y. Erythropoietin Enhances Arterioles More Significantly Than it Does Capillaries in an Infarcted Rat Heart Model. Int Heart J 2009; 50:801-10. [DOI: 10.1536/ihj.50.801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Tomohiro Imazuru
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | | | - Kazuyuki Hyodo
- Photon Factory, High Energy Accelerator Research Organization
| | - Chiho Tokunaga
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Shinya Kanemoto
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Yoshiharu Enomoto
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Yutaka Watanabe
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Yuji Hiramatsu
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Yuzuru Sakakibara
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
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17
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Bagaitkar J, Demuth DR, Scott DA. Tobacco use increases susceptibility to bacterial infection. Tob Induc Dis 2008; 4:12. [PMID: 19094204 PMCID: PMC2628337 DOI: 10.1186/1617-9625-4-12] [Citation(s) in RCA: 177] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Accepted: 12/18/2008] [Indexed: 02/06/2023] Open
Abstract
Active smokers and those exposed to secondhand smoke are at increased risk of bacterial infection. Tobacco smoke exposure increases susceptibility to respiratory tract infections, including tuberculosis, pneumonia and Legionnaires disease; bacterial vaginosis and sexually transmitted diseases, such as chlamydia and gonorrhoea; Helicobacter pylori infection; periodontitis; meningitis; otitis media; and post-surgical and nosocomial infections. Tobacco smoke compromises the anti-bacterial function of leukocytes, including neutrophils, monocytes, T cells and B cells, providing a mechanistic explanation for increased infection risk. Further epidemiological, clinical and mechanistic research into this important area is warranted.
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Affiliation(s)
- Juhi Bagaitkar
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY, USA.
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18
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Martel G, Al-Suhaibani Y, Moloo H, Haggar F, Friedlich M, Mamazza J, Poulin EC, Stern H, Boushey RP. Neoadjuvant therapy and anastomotic leak after tumor-specific mesorectal excision for rectal cancer. Dis Colon Rectum 2008; 51:1195-201. [PMID: 18523823 DOI: 10.1007/s10350-008-9368-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2007] [Revised: 03/07/2008] [Accepted: 03/22/2008] [Indexed: 12/11/2022]
Abstract
PURPOSE This study was designed to evaluate whether neoadjuvant therapy is a risk factor for anastomotic leakage after rectal cancer surgery. METHODS A retrospective review of 220 patients who underwent tumor-specific mesorectal excision for rectal cancer from 2000 to 2005 was performed. Risk factors for leak were identified by using a multivariable regression model. RESULTS A total of 54 patients received neoadjuvant chemoradiation therapy and surgery, whereas 166 received surgery alone. No difference in clinically significant leaks was observed between the two groups (5.6 vs. 6.6 percent, P = 1). A diverting ileostomy was performed in 26.4 percent of patients who received neoadjuvant therapy compared with 9.7 percent for surgery alone (P = 0.0021). Neoadjuvant patients were more likely to have ultralow anastomoses (17.6 vs. 2.5 percent, P < 0.0001). On multivariate analysis, smoking (odds ratio, 6.37 (1.8, 22.2), P = 0.004), difficult anastomosis (odds ratio, 7.66 (1.8, 31.5), P = 0.0048), and low level of anastomosis (<or=4 cm from the verge; odds ratio, 5.28 (1.05, 26.6), P = 0.044) were independently associated with anastomotic leakage. CONCLUSIONS Significant predictors of anastomotic leak include smoking, difficult anastomosis, and level of anastomosis (<or=4 cm). Neoadjuvant chemoradiation therapy was not found to be significantly associated with leakage after tumor-specific mesorectal excision for rectal cancer.
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Affiliation(s)
- Guillaume Martel
- Division of General Surgery, Colon & Rectal Surgery Unit, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
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19
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Sato F, Matsushita S, Hyodo K, Akishima S, Imazuru T, Tokunaga C, Enomoto Y, Kanemoto S, Hiramatsu Y, Sakakibara Y. Sex Difference in Peripheral Arterial Response to Cold Exposure. Circ J 2008; 72:1367-72. [DOI: 10.1253/circj.72.1367] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fujio Sato
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
| | - Shonosuke Matsushita
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
| | | | - Shinji Akishima
- Department of Cardiovascular Surgery, Ibarakihigashi Hospital
| | - Tomohiro Imazuru
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
| | - Chiho Tokunaga
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
| | - Yoshiharu Enomoto
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
| | - Shinya Kanemoto
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
| | - Yuji Hiramatsu
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
| | - Yuzuru Sakakibara
- Department of Cardiovascular Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba
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