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Chandran S, Orphal J, Ruth A. Experimental observation of the ν1+3 ν3 combination bands of 16O 14N 18O and 18O 14N 18O in the near infrared spectral region. Heliyon 2024; 10:e24853. [PMID: 38322877 PMCID: PMC10844122 DOI: 10.1016/j.heliyon.2024.e24853] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/15/2024] [Accepted: 01/16/2024] [Indexed: 02/08/2024] Open
Abstract
The first observation of the ν1+3ν3 combination band of the nitrogen dioxide isotopologue 16O14N18O is presented. The band was measured using Fourier-Transform Incoherent Broad-Band Cavity Enhanced Absorption Spectroscopy (FT-IBBCEAS) in the region between 5870 cm-1 and 5940 cm-1. To confirm the assignment, the band was simulated using a standard asymmetric top Watson Hamiltonian using extrapolated rotational and centrifugal distortion constants. Furthermore, the first experimental observation of the ν1+3ν3 band of the 18O14N18O isotopologue is also reported. The positions of ro-vibrational lines of the ν1+3ν3 band of the naturally most abundant isotopologue 16O14N16O were used for wavenumber calibration of line positions.
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Affiliation(s)
- S. Chandran
- School of Physics & Environmental Research Institute, University College Cork, Cork, Ireland
| | - J. Orphal
- Division 4 “Natural and Built Environment”, Karlsruhe Institute of Technology (KIT), Kaiserstrasse 12, 76131, Karlsruhe, Germany
| | - A.A. Ruth
- School of Physics & Environmental Research Institute, University College Cork, Cork, Ireland
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2
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Chetambath R, Kumar P, Nandini V, Chandran S, Chacko A. Catamenial haemothorax-A rare cause of pleural effusion. Lung India 2023; 40:541-544. [PMID: 37961963 PMCID: PMC10723198 DOI: 10.4103/lungindia.lungindia_144_23] [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: 03/27/2023] [Revised: 04/10/2023] [Accepted: 04/26/2023] [Indexed: 11/15/2023] Open
Abstract
Common causes of haemorrhagic pleural effusions include malignancy (primary or metastatic), tuberculosis, pulmonary embolism, collagen vascular diseases, trauma and iatrogenic causes. Clinical history along with pathologic, microbiologic and biochemical evaluation of pleural fluid confirms the diagnosis in most cases. However, if there is recurrent haemorrhagic effusion without corroborative history or mass lesion in lung, or evidence of microorganisms, then we should think of uncommon causes. Catamenial haemothorax (CHt) is a rare cause of haemorrhagic pleural effusion, which recurs during each menstrual cycle. This is a manifestation of thoracic endometriosis syndrome (TES) caused by ectopic endometrial tissue in the thoracic cavity in women of child-bearing age. This extremely rare condition is difficult to diagnose, unless direct correlation with the menstrual cycle is established. TES consists of pleural forms such as catamenial pneumothorax, non-catamenial endometriosis-related pneumothorax and haemothorax; and parenchymal forms such as catamenial haemoptysis and lung nodules. Here we report a case of CHt in a 43-year-old female whose diagnosis was established by thoracoscopic pleural biopsy.
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Affiliation(s)
| | - Praveen Kumar
- Department of Pulmonology, Baby Memorial Hospital, Kozhikode, Kerala, India
| | - V Nandini
- Department of Pulmonology, Baby Memorial Hospital, Kozhikode, Kerala, India
| | - Shilpa Chandran
- Department of Pulmonology, Baby Memorial Hospital, Kozhikode, Kerala, India
| | - Anju Chacko
- Department of Pulmonology, Baby Memorial Hospital, Kozhikode, Kerala, India
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3
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D A, Sudhan M A, Chandran S, Nuhmani S, Ahsan M, Alghadir AH, Khan M. Effects of modified sleeper stretch and modified cross-body stretch on upper limb functions and shoulder ROM in tennis players: a randomized trial. Sci Rep 2023; 13:9124. [PMID: 37277413 DOI: 10.1038/s41598-023-35977-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 05/26/2023] [Indexed: 06/07/2023] Open
Abstract
Tennis players often experience posterior shoulder pain due to restricted internal rotation (IR) range of motion (ROM) of the glenohumeral joint. No research has compared the effects of modified sleeper stretch (MSS) versus modified cross-body stretch (MCBS) on tennis players' upper limb functions and IR ROM. The study aimed to compare the efficacy of modified sleeper and cross-body adduction stretch in improving shoulder IR ROM and upper limb functions in tennis players. Thirty male lawn tennis players (aged 20 to 35 years) with more than 15° glenohumeral IR deficiency on the dominant side compared to the non-dominant side were recruited and divided into two groups: Modified sleeper stretch group (MSSG) and modified cross-body stretch group (MCBSG). MSSG received MSS, and MCBSG received MCBS, 3-5 repetitions once daily for 4 weeks. Upper limb functions were measured using the Disability of the Arm, Shoulder, and Hand (DASH) scale, and the IR ROM of the shoulder joint was measured using a universal goniometer. Both groups observed significant (p < 0.05) DASH scores and IR ROM improvements. DASH scores decreased by 85% in MSSG and 79.60% in MCBSG. IR ROM increased by 94.64% in MSSG and 89.52% in MCBSG. No significant differences (p > 0.05) were found in post-intervention DASH scores and IR ROM values between both groups. MSS and MCBS improved upper limb functions and IR ROM of the shoulder joint in the selected sample population of lawn tennis players. No difference was observed between both stretching techniques in improving upper limb functions and IR ROM of the shoulder joint.
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Affiliation(s)
- Anjupriya D
- Co-operative Institute of Health Sciences, Thalassery, Kerala, India
| | - Aparna Sudhan M
- Co-operative Institute of Health Sciences, Thalassery, Kerala, India
| | - Shilpa Chandran
- Co-operative Institute of Health Sciences, Thalassery, Kerala, India
| | - Shibili Nuhmani
- Department of Physical Therapy, College of Applied Medical Sciences, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mohammad Ahsan
- Department of Physical Therapy, College of Applied Medical Sciences, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Ahmad H Alghadir
- Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box. 10219, Riyadh, 11433, Saudi Arabia
| | - Masood Khan
- Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box. 10219, Riyadh, 11433, Saudi Arabia.
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Chandran S, Selvan P, Dhanasekarapandian M, Kumar V, Surendran U. Hydrogeochemical characteristics of surface and groundwater: suitability for human consumption and irrigated agriculture purposes in Suruliyar sub basin, South India. Environ Geochem Health 2022; 44:1713-1737. [PMID: 34767150 DOI: 10.1007/s10653-021-01145-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
The Suruliyar sub basin in Tamil Nadu, India, was monitored for the assessment of water and soil quality. Surface water, groundwater, and soil samples were collected during the pre-monsoon (June 2016) and post-monsoon (December 2016) seasons within the sub basin area and analyzed for various physical, chemical, and biological properties, namely, pH, electrical conductivity, total dissolved solids (TDS), calcium, magnesium, sodium, nitrate, sulfate, fluoride, chloride, biological oxygen demand, chemical oxygen demand, and total and fecal coliform. All the values were compared with Indian and global standards, and the values for each parameter were within the permissible limits. However, some samples were edging toward the upward limit. Fecal coliforms (14 to 36 counts per 100 ml) were present in the river water, thus indicating anthropogenic contamination. Correlation analysis confirmed that TDS was significantly positively correlated with most of the cations and anions. Groundwater was assessed using several indices, such as the Piper diagram, United States Salinity Laboratory diagram, sodium adsorption ratio, and sodium percentage. Results showed that all the groundwater samples could be used for irrigation purposes; however, the chloride contents exceeded the permissible limit. Soil analysis results showed that all nutrients were within the permissible limits. Drought assessment showed the existence of both dry and wet years occurring most frequently, which might have a strong influence on the quality of water and soil parameters. This study suggests that the monitoring of surface, groundwater, and soil parameters is essential to maintain the sub basin area for ensuring sustainable development in the future.
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Affiliation(s)
- S Chandran
- Department of Civil Engineering, Thiagarajar College of Engineering, Madurai, Tamil Nadu, 625015, India.
| | - P Selvan
- Department of Civil Engineering, Thiagarajar College of Engineering, Madurai, Tamil Nadu, 625015, India
| | - M Dhanasekarapandian
- Department of Civil Engineering, Thiagarajar College of Engineering, Madurai, Tamil Nadu, 625015, India
| | - V Kumar
- Department of Agricultural Engineering, ACRI, Madurai, Tamil Nadu, 625104, India
| | - U Surendran
- Water Management (Agriculture Division), CWRDM, Kunnamangalam, Kerala, 673571, India
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Be KH, Zorron Cheng Tao Pu L, Apostolov R, Vaughan R, Efthymiou M, Chandran S. Gastrointestinal: Gastric variceal coil migration: A rare entity in endoscopy. J Gastroenterol Hepatol 2022; 37:281. [PMID: 34378232 DOI: 10.1111/jgh.15637] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/12/2021] [Accepted: 07/22/2021] [Indexed: 12/09/2022]
Affiliation(s)
- K H Be
- Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia
| | - L Zorron Cheng Tao Pu
- Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia
| | - R Apostolov
- Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia.,Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia
| | - R Vaughan
- Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia.,Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia
| | - M Efthymiou
- Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia.,Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia
| | - S Chandran
- Department of Gastroenterology and Hepatology, Austin Health, Melbourne, Victoria, Australia.,Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia
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Thomas P, Venugopalan A, Narayanan S, Mathew T, Cherukuwada LPD, Chandran S, Pradeep J, Fitzgibbons TP, George V. Case Report: Occurrence of Severe Thoracic Aortic Aneurysms (Involving the Ascending, Arch, and Descending Segments) as a Result of Fibulin-4 Deficiency: A Rare Pathology With Successful Management. Front Cardiovasc Med 2021; 8:756765. [PMID: 34901216 PMCID: PMC8652058 DOI: 10.3389/fcvm.2021.756765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 10/25/2021] [Indexed: 11/24/2022] Open
Abstract
Aortic diseases requiring surgery in childhood are distinctive and rare. Very few reports in the literature account for the occurrence of multiple thoracic aortic aneurysms in the same pediatric patient because of a genetic cause. We report a rare occurrence of severe thoracic aortic aneurysms (involving the ascending, arch and descending aortic segments) with severe aortic insufficiency in a 7-year-old female child secondary to the extremely rare and often lethal genetic disorder, cutis laxa. She was eventually identified as a carrier of a homozygous EFEMP2 (alias FBLN4) mutation. This gene encodes the extracellular matrix protein fibulin-4, and its mutation is associated with autosomal recessive cutis laxa type 1B that leads to severe aortopathy with aneurysm formation and vascular tortuosity. Parents of the child were not known to be consanguineous. Significant symptomatic improvement in the patient could be discerned after timely intervention with the valve-sparing aortic root replacement (David V procedure) and a concomitant aortic arch replacement. This is a unique report with a successful outcome that highlights the occurrence of a rare hereditary aortopathy associated with a high morbidity and mortality, and the importance of an early diagnosis and timely management. It also offers insight to physicians in having a very broad differential and multimodal approach in handling rare pediatric cardio-pathologies with a genetic predisposition.
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Affiliation(s)
- Paul Thomas
- Department of Cardiology, Government General Hospital, Ernakulam, India
| | | | - Siddharth Narayanan
- Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, United States
| | - Thomas Mathew
- Department of Cardiothoracic and Vascular Surgery, Government Medical College, Kottayam, India
| | | | - Shilpa Chandran
- Department of Radiodiagnosis, Government Medical College, Thiruvananthapuram, India
| | - Jithu Pradeep
- Department of Internal Medicine, Montefiore Hospitals, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Timothy P Fitzgibbons
- Department of Cardiology, University of Massachussetts Medical School, Worcester, MA, United States
| | - Vijo George
- Department of Cardiology, Government General Hospital, Ernakulam, India
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7
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Crocker-Buque T, Williams S, Brentnall AR, Gabe R, Duffy S, Prowle JR, Orkin C, Kunst H, Cutino-Moguel T, Zenner D, Bloom B, Melzer M, de Freitas S, Darmalingam M, McCafferty K, Kapil V, Pfeffer P, Martin J, Gourtsoyannis Y, Chandran S, Dhariwal A, Rachman R, Milligan I, Mabayoje D, Adobah E, Falconer J, Nugent H, Yaqoob M, Collier D, Pearse R, Caulfield M, Tiberi S. The Barts Health NHS Trust COVID-19 cohort: characteristics, outcomes and risk scoring of patients in East London. Int J Tuberc Lung Dis 2021; 25:358-366. [PMID: 33977903 DOI: 10.5588/ijtld.20.0926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND: Barts Health National Health Service Trust (BHNHST) serves a diverse population of 2.5 million people in London, UK. We undertook a health services assessment of factors used to evaluate the risk of severe acute respiratory coronavirus 2 (SARS-CoV-2) infection.METHODS: Patients with confirmed polymerase chain reaction (PCR) test results admitted between 1 March and 1 August 2020 were included, alongwith clinician-diagnosed suspected cases. Prognostic factors from the 4C Mortality score and 4C Deterioration scores were extracted from electronic health records and logistic regression was used to quantify the strength of association with 28-day mortality and clinical deterioration using national death registry linkage.RESULTS: Of 2783 patients, 1621 had a confirmed diagnosis, of whom 61% were male and 54% were from Black and Minority Ethnic groups; 26% died within 28 days of admission. Mortality was strongly associated with older age. The 4C mortality score had good stratification of risk with a calibration slope of 1.14 (95% CI 1.01-1.27). It may have under-estimated mortality risk in those with a high respiratory rate or requiring oxygen.CONCLUSION: Patients in this diverse patient cohort had similar mortality associated with prognostic factors to the 4C score derivation sample, but survival might be poorer in those with respiratory failure.
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Affiliation(s)
- T Crocker-Buque
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - S Williams
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - A R Brentnall
- Wolfson Institute of Preventive Medicine, Queen Mary University of London, Mile End Road, London, UK
| | - R Gabe
- Wolfson Institute of Preventive Medicine, Queen Mary University of London, Mile End Road, London, UK, Barts Clinical Trials Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, Mile End Road, London, UK
| | - S Duffy
- Wolfson Institute of Preventive Medicine, Queen Mary University of London, Mile End Road, London, UK
| | - J R Prowle
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, The William Harvey Research Institute, Queen Mary University of London Charterhouse Square, London, UK
| | - C Orkin
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - H Kunst
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - T Cutino-Moguel
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - D Zenner
- Centre for Global Public Health, Queen Mary University of London, Mile End Road, London, UK
| | - B Bloom
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - M Melzer
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, Whipps Cross University Hospital, Barts Health NHS Trust, Leytonstone, London, UK
| | - S de Freitas
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - M Darmalingam
- Whipps Cross University Hospital, Barts Health NHS Trust, Leytonstone, London, UK
| | - K McCafferty
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - V Kapil
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, The William Harvey Research Institute, Queen Mary University of London Charterhouse Square, London, UK, St Bartholomew´s Hospital, Barts Health NHS Trust, West Smithfield, London, UK
| | - P Pfeffer
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, The William Harvey Research Institute, Queen Mary University of London Charterhouse Square, London, UK
| | - J Martin
- Newham University Hospital, Barts Health NHS Trust, London, UK
| | - Y Gourtsoyannis
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - S Chandran
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - A Dhariwal
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - R Rachman
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - I Milligan
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - D Mabayoje
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - E Adobah
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - J Falconer
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - H Nugent
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK
| | - M Yaqoob
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - D Collier
- Barts Clinical Trials Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, Mile End Road, London, UK, The William Harvey Research Institute, Queen Mary University of London Charterhouse Square, London, UK
| | - R Pearse
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, The William Harvey Research Institute, Queen Mary University of London Charterhouse Square, London, UK
| | - M Caulfield
- The William Harvey Research Institute, Queen Mary University of London Charterhouse Square, London, UK
| | - S Tiberi
- The Royal London Hospital, Barts Health NHS Trust, Whitechapel, London, UK, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK, Newham University Hospital, Barts Health NHS Trust, London, UK
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Chandran S, Panayi M. P229 Children and young people with cystic fibrosis enhanced multidisciplinary pathways to address their educational needs during the evolving COVID-19 pandemic. J Cyst Fibros 2021. [PMCID: PMC8192131 DOI: 10.1016/s1569-1993(21)01254-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Pontillo A, Lonardi C, Chandran S, Vercruysse F, Corallo L, Verleysen P. Experimental study of the stress state and strain rate dependent mechanical behaviour of TRIP-assisted steels. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125005003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This paper presents an investigation into the effect of different stress states and strain rates on the austenite-to-martensite transformation during plastic straining of a Q&P steel. Different stress states are imposed to the steel using purposed-designed samples. The sample geometries, including in-plane shear, dogbone and plane strain samples, are optimised by finite element modelling. Tensile tests are performed at different strain rates of 0.001 s-1, 10 s-1 and 500 s-1. Digital image correlation is used to capture the strain fields during the entire deformation process. The mechanical results indicate a positive strain rate sensitivity for both the shear and plane strain specimens and a negative strain rate sensitivity for the dogbone sample. In addition, the influence of the strain rate on the strain level is more pronounced for the shear than for the plane strain specimens and for the dogbone samples.
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Dowdall F, Tansinda A, Donnelly M, Chandran S. P227 Cystic fibrosis social workers’ experience of working during COVID-19. J Cyst Fibros 2021. [PMCID: PMC8192134 DOI: 10.1016/s1569-1993(21)01252-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gregory JM, McDade K, Livesey MR, Croy I, Marion de Proce S, Aitman T, Chandran S, Smith C. Spatial transcriptomics identifies spatially dysregulated expression of GRM3 and USP47 in amyotrophic lateral sclerosis. Neuropathol Appl Neurobiol 2020; 46:441-457. [PMID: 31925813 DOI: 10.1111/nan.12597] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/21/2019] [Indexed: 02/02/2023]
Abstract
AIMS The mechanisms underlying the selective degeneration of motor neurones in amyotrophic lateral sclerosis (ALS) are poorly understood. The aim of this study was to implement spatially resolved RNA sequencing in human post mortem cortical tissue from an ALS patient harbouring the C9orf72 hexanucleotide repeat expansion to identify dysregulated transcripts that may account for differential vulnerabilities of distinct (i) cell types and (ii) brain regions in the pathogenesis of ALS. METHODS Using spatial transcriptomics (ST) we analysed the transcriptome of post mortem brain tissue, with spatial resolution down to 100 μm. Validation of these findings was then performed using BaseScope, an adapted, in situ hybridization technique with single-transcript single-cell-resolution, providing extensive regional and cell-type specific confirmation of these dysregulated transcripts. The validation cohort was then extended to include multiple post mortem brain regions and spinal cord tissue from an extended cohort of C9orf72, sporadic ALS (sALS) and SOD1 ALS cases. RESULTS We identified sixteen dysregulated transcripts of proteins that have roles within six disease-related pathways. Furthermore, these complementary molecular pathology techniques converged to identify two spatially dysregulated transcripts, GRM3 and USP47, that are commonly dysregulated across sALS, SOD1 and C9orf72 cases alike. CONCLUSIONS This study presents the first description of ST in human post mortem cortical tissue from an ALS patient harbouring the C9orf72 hexanucleotide repeat expansion. These data taken together highlight the importance of preserving spatial resolution, facilitating the identification of genes whose dysregulation may in part underlie regional susceptibilities to ALS, crucially highlighting potential therapeutic and diagnostic targets.
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Affiliation(s)
- J M Gregory
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Edinburgh Pathology, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
| | - K McDade
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Edinburgh Pathology, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
| | - M R Livesey
- Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK.,Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - I Croy
- Edinburgh Pathology, University of Edinburgh, Edinburgh, UK.,Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - S Marion de Proce
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - T Aitman
- Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK.,Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - S Chandran
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK.,Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - C Smith
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Edinburgh Pathology, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
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Khan SA, Chandran S. Gastrointestinal: Large psoas muscle collection from communication with pancreatic pseudocyst treated with endoscopic ultrasound-guided lumen-apposing metal stent insertion. J Gastroenterol Hepatol 2019; 34:1893. [PMID: 31332848 DOI: 10.1111/jgh.14722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 05/17/2019] [Indexed: 12/09/2022]
Affiliation(s)
- S A Khan
- Department of Gastroenterology, Austin Health, Melbourne, Victoria, Australia
| | - S Chandran
- Department of Gastroenterology, Austin Health, Melbourne, Victoria, Australia
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13
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Potluri R, Ainslie M, Chandran S, Patel B, More R, Chalil S. P6381Cardiac arrest patients presenting to hospitals at weekends are not subject to the weekend effect: insights from ACALM big data, United Kingdom. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0977] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Patients presenting to hospital with a cardiac arrest are associated with significant mortality in the United Kingdom. The evidence for the weekend affect involving cardiac arrests is unclear and we investigated this further with ACALM big data.
Methods
Anonymous information on patients presenting to hospital with a cardiac arrest was obtained from several hospitals in UK between 2000–2014. ICD-10 and OPCS-4 codes were used to trace patients coded for primary cardiac arrest, co-morbidities and mortality data.
Results
Details of 4803 patients presenting with cardiac arrest is shown in Table1. Cox regression model including age, gender, ethnic group, Charlson score and the top ten causes of death in the UK showed that weekend presentation did not contribute to increased mortality (OR 1.01; 95%C.I 0.94–1.11; p=0.692)
Table 1. Demographics and co-morbidities of cardiac arrest patients presenting on weekdays and weekends Weekday Weekend N (%) 3892 (81.0) 919 (19.0) Mean age ± S.D (years) 67.7±16.6 67.4±17.5 Male, % 55.4 54.1 Co-morbidities Mean Charlson Index 1.52 1.33 Heart Failure % 21.4 20.4 IHD % 38.4 37.1 Cancer (Lung, Breast or Colon) % 5.2 3.8 Cerebrovascular Disease % 6.4 6.3 COPD % 15.0 12.0 CKD % 9.4 7.7 Dementia % 4.7 2.6 Pneumonia % 14.7 14.4 Outcomes Crude 30 day mortality % 25.4* 32.8* Crude 1 year mortality % 41.0* 44.3* *Cox regression analyses showed no significant differences in mortality between weekend and weekday presentation.
Conclusion
We have demonstrated that the “weekend effect” is not present in patients admitted to hospital with cardiac arrest. Our findings can perhaps be explained by the presence of 24/7 cardiac arrest teams present in acute hospitals.
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Affiliation(s)
- R Potluri
- Aston University, ACALM Study Unit in collaboration with Aston Medical School, Birmingham, United Kingdom
| | - M Ainslie
- Blackpool Teaching Hospitals NHS Trust, Blackpool, United Kingdom
| | - S Chandran
- The Royal Oldham Hospital, Pennine Acute Hospitals NHS Trust, Oldham, United Kingdom
| | - B Patel
- Blackpool Teaching Hospitals NHS Trust, Blackpool, United Kingdom
| | - R More
- Blackpool Teaching Hospitals NHS Trust, Blackpool, United Kingdom
| | - S Chalil
- Blackpool Teaching Hospitals NHS Trust, Blackpool, United Kingdom
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14
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Gregory JM, Elliott E, McDade K, Bak T, Pal S, Chandran S, Abrahams S, Smith C. Neuronal clusterin expression is associated with cognitive protection in amyotrophic lateral sclerosis. Neuropathol Appl Neurobiol 2019; 46:255-263. [PMID: 31386770 PMCID: PMC7318312 DOI: 10.1111/nan.12575] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 07/12/2019] [Accepted: 07/26/2019] [Indexed: 12/11/2022]
Abstract
AIMS Clusterin is a topologically dynamic chaperone protein with the ability to participate in both intra- and extacellular proteostasis. Clusterin has been shown to be upregulated in the spinal cord of patients with amyotrophic lateral sclerosis (ALS) and has been shown to protect against TDP-43 protein misfolding in animal and cell models. Previous studies have demonstrated an association between the pathological burden of TDP-43 misfolding and cognitive deficits in ALS, demonstrating high specificity, but correspondingly low sensitivity owing to a subset of individuals with no evidence of cognitive deficits despite a high burden of TDP-43 pathology, called mismatch cases. METHODS Hypothesizing that differences in the ability to cope with protein misfolding in these cases may be due to differences in expression of protective mechanisms such as clusterin expression, we assessed the spatial expression of clusterin and another chaperone protein, HspB8, in post mortem brain tissue of mismatch cases. We employed a modified in situ hybridization technique called BaseScope, with single cell, single transcript resolution. RESULTS Mismatch cases demonstrated differential spatial expression of clusterin, with a predominantly neuronal pattern, compared to cases with cognitive manifestations of their TDP-43 pathology who demonstrated a predominantly glial distribution of expression. CONCLUSIONS Our data suggest that, in individuals with TDP-43 pathology, predominantly neuronal expression of clusterin in extra-motor brain regions may indicate a cell protective mechanism delaying clinical manifestations such as cognitive dysfunction.
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Affiliation(s)
- J M Gregory
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
| | - E Elliott
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
| | - K McDade
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
| | - T Bak
- Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK.,Human Cognitive Neuroscience, Psychology, University of Edinburgh, Edinburgh, UK
| | - S Pal
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
| | - S Chandran
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
| | - S Abrahams
- Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK.,Human Cognitive Neuroscience, Psychology, University of Edinburgh, Edinburgh, UK
| | - C Smith
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.,Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh, UK
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15
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Chan JC, Chong CY, Thoon KC, Tee NWS, Maiwald M, Lam JCM, Bhattacharya R, Chandran S, Yung CF, Tan NWH. Invasive paediatric Elizabethkingia meningoseptica infections are best treated with a combination of piperacillin/tazobactam and trimethoprim/sulfamethoxazole or fluoroquinolone. J Med Microbiol 2019; 68:1167-1172. [PMID: 31199227 PMCID: PMC7423161 DOI: 10.1099/jmm.0.001021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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] [Indexed: 11/18/2022] Open
Abstract
Objectives Elizabethkingia meningoseptica is a multi-drug-resistant organism that is associated with high mortality and morbidity in newborn and immunocompromised patients. This study aimed to identify the best antimicrobial therapy for treating this infection. Methods A retrospective descriptive study was conducted from 2010 to 2017 in a tertiary paediatric hospital in Singapore. Paediatric patients aged 0 to 18 years old with a positive culture for E. meningoseptica from any sterile site were identified from the hospital laboratory database. The data collected included clinical characteristics, antimicrobial susceptibility and treatment, and clinical outcomes. Results Thirteen cases were identified in this study. Combination therapy with piperacillin/tazobactam and trimethoprim/sulfamethoxazole or a fluoroquinolone resulted in a cure rate of 81.8 %. The mortality rate was 15.4 % and neurological morbidity in patients with bacteraemia and meningitis remained high (75 %). Conclusions Treatment with combination therapy of piperacillin/tazobactam and trimethoprim/sulfamethoxazole or a fluroquinolone was effective in this study, with low mortality rates being observed.
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Affiliation(s)
- J C Chan
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Paediatrics, KK Women's and Children's Hospital, Singapore
| | - C Y Chong
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.,Duke-National University of Singapore Medical School, Singapore.,Department of Paediatrics, Infectious Disease Service, KK Women's and Children's Hospital, Singapore
| | - K C Thoon
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Paediatrics, Infectious Disease Service, KK Women's and Children's Hospital, Singapore.,Duke-National University of Singapore Medical School, Singapore
| | - N W S Tee
- Duke-National University of Singapore Medical School, Singapore.,Department of Pathology and Laboratory Medicine, National University Hospital, Singapore.,Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - M Maiwald
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore
| | - J C M Lam
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Duke-National University of Singapore Medical School, Singapore.,Department of Paediatric Subspecialties, Haematology/Oncology Service, KK Women's and Children's Hospital, Singapore
| | - R Bhattacharya
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Duke-National University of Singapore Medical School, Singapore.,Department of Paediatric Subspecialties, Haematology/Oncology Service, KK Women's and Children's Hospital, Singapore
| | - S Chandran
- Duke-National University of Singapore Medical School, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Neonatology, KK Women's and Children's Hospital, Singapore
| | - C F Yung
- Department of Paediatrics, Infectious Disease Service, KK Women's and Children's Hospital, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - N W H Tan
- Duke-National University of Singapore Medical School, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Paediatrics, Infectious Disease Service, KK Women's and Children's Hospital, Singapore
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16
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Massey-Chase R, Chandran S, Heise R, Dignan J, Macedo P, Bossley C. P468 Personalising transition pathways for young people moving from paediatric to adult cystic fibrosis services. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30760-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Oliver C, Smith K, Tansinda A, Dalton C, Chandran S. P462 Cystic fibrosis social work provision in the UK. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30754-4] [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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18
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Debnath KK, Kanapaty Y, Yong DJ, Chandran S, Bakri A. 'Pai Syndrome' with anterior alveolar polyp: A variant of a rare clinical entity. Med J Malaysia 2019; 74:229-230. [PMID: 31256179] [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: 06/09/2023]
Abstract
'Pai syndrome' (PS) is a rare congenital syndrome. Presented here, a new-born baby-girl who exhibited the characteristic features of having a midline nasal (septal) polyp, an anterior alveolar process polyp, and a pericallosal lipoma associated with corpus callosum dysgenesis of the brain. Both polyps were lined with stratified-squamous epithelium. The overall features were largely consistent with those described by Pai et al., in 1987. A midline cleft-lip (with or without cleft-alveolus) is one of the most common features of the syndrome which was however absent in this case. Instead, an anterior alveolar polyp is present, which is relatively rare.
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Affiliation(s)
| | - Y Kanapaty
- Hospital Duchess of Kent, Sabah, Malaysia
| | - D J Yong
- Queen Elizabeth Hospital, Sabah, Malaysia
| | - S Chandran
- Hospital Duchess of Kent, Sabah, Malaysia
| | - A Bakri
- Hospital Duchess of Kent, Sabah, Malaysia
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19
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Suhail K, George M, Chandran S, Varma R, Venables DS, Wang M, Chen J. Open path incoherent broadband cavity-enhanced measurements of NO 3 radical and aerosol extinction in the North China Plain. Spectrochim Acta A Mol Biomol Spectrosc 2019; 208:24-31. [PMID: 30286400 DOI: 10.1016/j.saa.2018.09.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/31/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
We describe the observation of the NO3 radical using an incoherent broadband cavity-enhanced absorption spectrometer in an open-path configuration (OP-IBBCEAS) in a polluted summer environment in continental China. The instrument was installed 17 m above the ground at the top of a residential complex near the CAREBeijing-NCP 2014 site in Wangdu, Hebei province, about 200 km southwest of Beijing over the period 28 to 30 June 2014. The separation between the transmitter and receiver components of the instrument was 335 cm and the effective pathlength in clean reference air was ~3.4 km. NO3 was detected above the detection limit on all three nights when the instrument was operational. The maximum mixing ratio measured was ~175 pptv with a detection sensitivity of ~36 pptv for measurements with an average acquisition time of 10 min. While most extractive instruments try to avoid interferences arising from aerosol extinction, the open path configuration has advantages owing to its ability to detect trace gases even in the presence of aerosol loading. Moreover, concurrent retrieval of aerosol optical extinction is possible from analysis of the absorption magnitude of the oxygen B-band at 687 nm. The experimental setup, its calibration, data acquisition, and analysis procedure are discussed, and the results presented here demonstrate the sensitivity and specificity that can be achieved at high spatial and temporal resolution using the novel configuration of IBBCEAS in the open path.
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Affiliation(s)
- K Suhail
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China; Department of Physics, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - M George
- Department of Physics, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - S Chandran
- Department of Physics, National Institute of Technology Calicut, Calicut 673601, Kerala, India; Physics Department & Environmental Research Institute, University College Cork, Cork, Ireland; Optind Solutions Pvt. LTD. Unit 11, Technology Business Incubator, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - R Varma
- Department of Physics, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - D S Venables
- School of Chemistry & Environmental Research Institute, University College Cork, Cork, Ireland
| | - M Wang
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - J Chen
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China.
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20
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Carter PR, Uppal H, Devakumar V, Chandran S, Bainey K, Potluri R. P4203Rheumatoid arthritis is a risk factor for ischaemic heart disease and subsequent mortality compared to non-inflammatory arthritis: insights using big data from the UK ACALM registry. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4203] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- P R Carter
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - H Uppal
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - V Devakumar
- Pennine Acute NHS Foundation Trust, Manchester, United Kingdom
| | - S Chandran
- Pennine Acute NHS Foundation Trust, Manchester, United Kingdom
| | - K Bainey
- Mazankowski Alberta Heart Institute, Division of Cardiology, Edmonton, Canada
| | - R Potluri
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
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21
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Ramanathan S, Arunachalam K, Chandran S, Selvaraj R, Shunmugiah K, Arumugam V. Biofilm inhibitory efficiency of phytol in combination with cefotaxime against nosocomial pathogen Acinetobacter baumannii. J Appl Microbiol 2018; 125:56-71. [DOI: 10.1111/jam.13741] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/11/2018] [Accepted: 02/18/2018] [Indexed: 12/29/2022]
Affiliation(s)
- S. Ramanathan
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - K. Arunachalam
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - S. Chandran
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - R. Selvaraj
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - K.P. Shunmugiah
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - V.R. Arumugam
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
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22
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Abiramalatha T, Kumar M, Chandran S, Sudhakar Y, Thenmozhi M, Thomas N. Troponin-T as a biomarker in neonates with perinatal asphyxia. J Neonatal Perinatal Med 2018; 10:275-280. [PMID: 28854510 DOI: 10.3233/npm-16119] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Troponin-T is a commonly used cardiac biomarker, which could be useful in perinatal asphyxia. We aimed to analyze troponin-T concentrations in asphyxiated neonates and to correlate the concentrations with clinical outcomes. METHODS Data were collected from electronic medical records of neonates diagnosed with perinatal asphyxia over a period of four years. RESULTS There were 63 neonates with moderate to severe encephalopathy, in whom serial troponin-T concentrations had been done on days 1, 3, and 7. 53 (84%) asphyxiated infants had troponin-T concentration >100 pg/ml at 2-4 h of life.The difference in troponin-T concentrations between moderate and severe encephalopathy was not statistically significant (173 vs. 263 pg/ml, p value 0.40). The difference in the concentrations at 72 hours between cooled and non-cooled neonates was not significant (48.5 vs. 62.5 pg/ml, p value 0.22). Troponin-T concentration was significantly higher in babies with hypotensive shock and hepatic injury, but not acute kidney injury. There was no significant correlation between troponin-T and the extent of resuscitation needed.Troponin-T concentration on day 1 of life was significantly higher in babies who died than who survived (407 vs. 168 pg/ml, p value 0.03). ROC curve for troponin-T to predict mortality had an area under the curve (AUC) of 0.803; the best cut-off value (190 pg/ml) had 82% sensitivity and 80% specificity. CONCLUSION There was no significant difference in troponin-T concentrations between cooled and non-cooled neonates. Troponin-T concentration had a good predictive accuracy for mortality before discharge.
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Affiliation(s)
- T Abiramalatha
- Department of Neonatology, Christian Medical College, Vellore, Tamil Nadu, India
| | - M Kumar
- Department of Neonatology, Christian Medical College, Vellore, Tamil Nadu, India
| | - S Chandran
- Department of Neonatology, Christian Medical College, Vellore, Tamil Nadu, India
| | - Y Sudhakar
- Department of Biochemistry, Christian Medical College, Vellore, Tamil Nadu, India
| | - M Thenmozhi
- Department of Biostatistics, Christian Medical College, Vellore, Tamil Nadu, India
| | - N Thomas
- Department of Neonatology, Christian Medical College, Vellore, Tamil Nadu, India
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23
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Carter P, Uppal H, Chandran S, Bainey K, Potluri R. 3106Patients with a diagnosis of hyperlipidaemia have a reduced risk of developing breast cancer and lower mortality rates: a large retrospective longitudinal cohort study from the UK ACALM registry. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.3106] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- P.R. Carter
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - H. Uppal
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - S. Chandran
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - K.R. Bainey
- Mazankowski Alberta Heart Institute, Division of Cardiology, Edmonton, Canada
| | - R. Potluri
- Mazankowski Alberta Heart Institute, ACALM Study Unit in collaboration with Aston Medical School, Edmonton, Canada
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24
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Carter P, Uppal H, Chandran S, Potluri R. P4431Marriage is associated with lower mortality rates in patients with acute coronary syndromes and modifiable cardiovascular risk factors. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- P.R. Carter
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - H. Uppal
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - S. Chandran
- Aston University, ACALM Research Unit, Birmingham, United Kingdom
| | - R. Potluri
- Mazankowski Alberta Heart Institute, ACALM Study Unit in collaboration with Aston Medical School, Edmonton, Canada
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25
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Khawar H, Carter P, Gollop N, Uppal H, Chandran S, Potluri R. P1477Impact of cardiovascular risk factors and disease on length of stay and mortality in patients with heart failure. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1477] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H. Khawar
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - P.R. Carter
- Royal Free London NHS Trust, London, United Kingdom
| | - N.D. Gollop
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - H. Uppal
- ACALM study unit in collaberation with Aston Medical School, Aston University, Birmingham, United Kingdom
| | - S. Chandran
- Department of Acute Medicine, North Western Deanery, Manchester, United Kingdom
| | - R. Potluri
- Mazankowski Alberta Heart Institute, ACALM study unit in collaberation with Aston Medical School, Edmonton, Canada
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26
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Chandran S, Watkins J, Abdul-Aziz A, Calvert P, Bowles K, Flather M, Rushworth S, Ryding A. P1779Differential cytokine expression between the coronary and peripheral circulation in patients with ruptured and intact fibrous caps presenting with ST segment myocardial infarction. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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27
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Rowbotham N, Smith S, McPhee M, Elliott Z, Rayner O, Leighton P, Daniels T, Collins S, Duff A, Nash E, Tabberner M, Chandran S, Peaple U, Morley R, Smyth A. EPS1.9 Question CF: a James Lind Alliance Priority Setting Partnership in cystic fibrosis. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30282-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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Mollereau B, Rzechorzek NM, Roussel BD, Sedru M, Van den Brink DM, Bailly-Maitre B, Palladino F, Medinas DB, Domingos PM, Hunot S, Chandran S, Birman S, Baron T, Vivien D, Duarte CB, Ryoo HD, Steller H, Urano F, Chevet E, Kroemer G, Ciechanover A, Calabrese EJ, Kaufman RJ, Hetz C. Adaptive preconditioning in neurological diseases - therapeutic insights from proteostatic perturbations. Brain Res 2016; 1648:603-616. [PMID: 26923166 PMCID: PMC5010532 DOI: 10.1016/j.brainres.2016.02.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [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: 02/15/2016] [Accepted: 02/16/2016] [Indexed: 02/06/2023]
Abstract
In neurological disorders, both acute and chronic neural stress can disrupt cellular proteostasis, resulting in the generation of pathological protein. However in most cases, neurons adapt to these proteostatic perturbations by activating a range of cellular protective and repair responses, thus maintaining cell function. These interconnected adaptive mechanisms comprise a 'proteostasis network' and include the unfolded protein response, the ubiquitin proteasome system and autophagy. Interestingly, several recent studies have shown that these adaptive responses can be stimulated by preconditioning treatments, which confer resistance to a subsequent toxic challenge - the phenomenon known as hormesis. In this review we discuss the impact of adaptive stress responses stimulated in diverse human neuropathologies including Parkinson׳s disease, Wolfram syndrome, brain ischemia, and brain cancer. Further, we examine how these responses and the molecular pathways they recruit might be exploited for therapeutic gain. This article is part of a Special Issue entitled SI:ER stress.
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Affiliation(s)
- B Mollereau
- Univ Lyon, ENS de Lyon, Univ Claude Bernard, CNRS UMR5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, F-69007, Lyon, France.
| | - N M Rzechorzek
- Centre for Clinical Brain Sciences, Chancellor's Building, University of Edinburgh, Edinburgh EH16 4SB, United Kingdom; Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian EH25 9RG, United Kingdom
| | - B D Roussel
- Inserm, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, 14000 Caen, France
| | - M Sedru
- Univ Lyon, ENS de Lyon, Univ Claude Bernard, CNRS UMR5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, F-69007, Lyon, France
| | - D M Van den Brink
- Univ Lyon, ENS de Lyon, Univ Claude Bernard, CNRS UMR5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, F-69007, Lyon, France
| | - B Bailly-Maitre
- INSERM U1065, C3M, Team 8 (Hepatic Complications in Obesity), Nice, France
| | - F Palladino
- Univ Lyon, ENS de Lyon, Univ Claude Bernard, CNRS UMR5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, F-69007, Lyon, France
| | - D B Medinas
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Molecular Studies of the Cell, Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Santiago, Chile
| | - P M Domingos
- ITQB-UNL, Av. da Republica, EAN, 2780-157 Oeiras, Portugal
| | - S Hunot
- Inserm, U 1127, F-75013 Paris, France; CNRS, UMR 7225, F-75013 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, F-75013 Paris, France; Institut du Cerveau et de la Moelle épinière, ICM, F-75013 Paris, France
| | - S Chandran
- Centre for Clinical Brain Sciences, Chancellor's Building, University of Edinburgh, Edinburgh EH16 4SB, United Kingdom
| | - S Birman
- Genes Circuits Rhythms and Neuropathology, Brain Plasticity Unit, CNRS UMR 8249, ESPCI ParisTech, PSL Research University, 75005 Paris, France
| | - T Baron
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Neurodegenerative Diseases Unit, 31, avenue Tony Garnier, 69364 Lyon Cedex 07, France
| | - D Vivien
- Inserm, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, 14000 Caen, France
| | - C B Duarte
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Faculty of Medicine, Rua Larga, and Department of Life Sciences, University of Coimbra, 3004-504 Coimbra, Portugal
| | - H D Ryoo
- Department of Cell Biology, New York University School of Medicine, New York, NY, USA
| | - H Steller
- Howard Medical Institute, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA
| | - F Urano
- Washington University School of Medicine, Department of Internal Medicine, St. Louis, MO 63110 USA
| | - E Chevet
- Inserm ERL440 "Oncogenesis, Stress, Signaling", Université de Rennes 1, Rennes, France; Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France
| | - G Kroemer
- Equipe 11 labellisée par la Ligue contre le Cancer, Centre de Recherche des Cordeliers, Paris, France; Cell Biology and Metabolomics platforms, Gustave Roussy Comprehensive Cancer Center, Villejuif, France; INSERM, U1138, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France; Université Pierre et Marie Curie, Paris, France; Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France; Karolinska Institute, Department of Women׳s and Children׳s Health, Karolinska University Hospital, Stockholm, Sweden
| | - A Ciechanover
- The Polak Cancer and Vascular Biology Research Center, The Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Haifa 30196, Israel
| | - E J Calabrese
- Department of Environmental Health Sciences, University of Massachusetts, Morrill I, N344, Amherst, MA 01003, USA
| | - R J Kaufman
- Degenerative Diseases Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Rd., La Jolla, CA 92037, USA
| | - C Hetz
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Molecular Studies of the Cell, Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Santiago, Chile; Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA, USA
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Lazzarini E, Carter PR, De Boer M, Balbi C, Altieri P, Pfeffer U, Gambini E, Varesio L, Bosco MC, Coviello D, Pompilio G, Brunelli C, Cancedda R, Ameri P, Bollini S, Mcgowan J, Uppal H, Chandran S, Sarma J, Potluri R, Octavia Y, De Kleijnen MGJ, Van Thiel BS, Ridwan Y, Te Lintel Hekkert M, Van Der Pluijm I, Essers J, Hoeijmakers JH, Duncker DJ. Mechanisms of Cancer-related Cardiomyopathy67Protection against chemotherapy cardiotoxicity by the human amniotic fluid stem cell secretome: a new tool for future paracrine therapy68Hyperlipidaemia reduces mortality in breast, prostate, lung and bowel cancer69DNA-repair in cardiomyocytes is critical for maintaining cardiac function. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Rasoul D, Ziaei F, Shan SKA, Khan J, Bhayani R, Shakir S, Uppal H, Chandran S, Sarma J, Potluri R. 11 The Decennial Relationship between Heart Failure and Atrial Fibrillation – A Large Population Study. Heart 2016. [DOI: 10.1136/heartjnl-2016-309890.11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Affiliation(s)
- S Chandran
- Department of Therapeutic Endoscopy and Endoscopic Oncology, St. Michael's Hospital, Toronto, Ontario, Canada
| | - P Kortan
- Department of Therapeutic Endoscopy and Endoscopic Oncology, St. Michael's Hospital, Toronto, Ontario, Canada
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Rasoul D, Wong S, Chandran S, Uppal H, Potluri R. PS216 Psychiatric Co-Morbidities and Tendencies in Patients with Non-Ischaemic Heart Failure (NIHF) – A Large Observational Cohort Study Spanning 14 Years. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.173] [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: 11/24/2022] Open
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Morgan TA, Chandran S, Burger IM, Zhang CA, Goldstein RB. Complications of Ultrasound-Guided Renal Transplant Biopsies. Am J Transplant 2016; 16:1298-305. [PMID: 26601796 DOI: 10.1111/ajt.13622] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 11/06/2015] [Accepted: 11/07/2015] [Indexed: 01/25/2023]
Abstract
Renal transplant biopsies to diagnose transplant pathology are routinely performed using ultrasound guidance. Few large studies have assessed the rate and risk factors of major biopsy complications. This study is a single-center 5-year retrospective cohort analysis of 2514 biopsies. Major complications occurred in 47 of 2514 patients (1.9%) and included hospitalization, transfusion of blood products, operative exploration and interventional radiology procedures. The complication rate among "cause" biopsies was significantly higher than in "protocol" biopsies (2.7% vs. 0.33%, p < 0.001). Complications presented on postbiopsy days 0-14, with the majority diagnosed on the same day as the biopsy and manifested by hematocrit drop, although the presence of such delayed presentation of complications occurring >24 h after the biopsy on days 2-14 is previously unreported. Specific patient characteristics associated with increased risk of a complication were increased age and blood urea nitrogen, decreased platelet count, history of prior renal transplant, deceased donor transplant type and use of anticoagulant medications but not aspirin.
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Affiliation(s)
- T A Morgan
- Department of Radiology and Biomedical Imaging, Univeristy of California San Francisco, San Francisco, CA
| | - S Chandran
- Kidney Transplant Service, Division of Nephrology, Department of Medicine, University of California San Francisco, San Francisco, CA
| | - I M Burger
- Department of Radiology, Kaiser Permanente Los Angeles/VA Greater Los Angeles Healthcare System, Los Angeles, CA
| | - C A Zhang
- Department of Radiology and Biomedical Imaging, Univeristy of California San Francisco, San Francisco, CA
| | - R B Goldstein
- Department of Radiology and Biomedical Imaging, Univeristy of California San Francisco, San Francisco, CA
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Chandran S. Molecular characterization of escherichia coli isolated from hospital acquired infections from two different geographical areas, Ujjain and Bangalore. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.229] [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: 10/22/2022] Open
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35
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Chandran S, Parker F, Lontos S, Vaughan R, Efthymiou M. Can we ease the financial burden of colonoscopy? Using real-time endoscopic assessment of polyp histology to predict surveillance intervals. Intern Med J 2015; 45:1293-9. [DOI: 10.1111/imj.12917] [Citation(s) in RCA: 8] [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] [Received: 01/10/2015] [Revised: 09/15/2015] [Accepted: 09/18/2015] [Indexed: 12/14/2022]
Affiliation(s)
- S. Chandran
- Departments of Gastroenterology; Austin Health; Melbourne Australia
| | - F. Parker
- Anaesthetics; Austin Health; Melbourne Australia
| | - S. Lontos
- Departments of Gastroenterology; Austin Health; Melbourne Australia
- Department of Gastroenterology; Warringal Private Hospital; Melbourne Australia
| | - R. Vaughan
- Departments of Gastroenterology; Austin Health; Melbourne Australia
- Department of Gastroenterology; Warringal Private Hospital; Melbourne Australia
| | - M. Efthymiou
- Departments of Gastroenterology; Austin Health; Melbourne Australia
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Abstract
BACKGROUND Down syndrome is a genetic condition that contributes to a significantly shorter life expectancy compared with the general population. We investigated the most common comorbidities in a population of acute hospital patients with Down syndrome and further explored what the most common risk factors for mortality are within this population. METHOD From our database of one million patients admitted to National Health Service (NHS) Trusts in northern England, we identified 558 people who had Down syndrome. We compared this group with an age- and gender-matched control group of 5580 people. RESULTS The most prevalent comorbid diseases within the Down's population were hypothyroidism (22.9%) and epilepsy (20.3%). However, the conditions that had the highest relative risks (RRs) in the Down's population were septal defects and dementia. Respiratory failure, dementia and pneumonia were the most significantly related comorbidities to mortality in the Down syndrome population. In the control population, respiratory failure, dementia and renal failure were the most significant disease contributors. When these contributors were analysed using multivariate analysis, heart failure, respiratory failure, pneumonia and epilepsy were the identified risk factors for in-hospital mortality in the Down syndrome population. Respiratory failure was the sole risk factor for mortality in the Down syndrome population [RR = 9.791 (1.6-59.9) P ≤ 0.05], when compared with the risk factors for mortality in the control population. CONCLUSIONS There is significant medical morbidity in Down syndrome. This morbidity contributes to the lower life expectancy. Respiratory failure is a risk factor for mortality in Down syndrome. We need to thoroughly investigate people with Down syndrome to ensure any treatable illnesses are well managed.
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Affiliation(s)
- H Uppal
- ACALM Study Unit in collaboration with Aston Medical School, Aston University, Birmingham, UK
| | - S Chandran
- Department of Acute Medicine, North Western Deanery, Oldham, UK
| | - R Potluri
- ACALM Study Unit in collaboration with Aston Medical School, Aston University, Birmingham, UK
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Webb D, Balmforth C, Ruiys T, Dhaun N, Cameron J, Borooah S, Dhillon B, Chandran S. Clinical Utility Of Optical Coherence Tomography (Oct) In High Cardiovascular Risk Patients. Clin Ther 2015. [DOI: 10.1016/j.clinthera.2015.05.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gamal W, Borooah S, Smith S, Underwood I, Srsen V, Chandran S, Bagnaninchi PO, Dhillon B. Real-time quantitative monitoring of hiPSC-based model of macular degeneration on Electric Cell-substrate Impedance Sensing microelectrodes. Biosens Bioelectron 2015; 71:445-455. [PMID: 25950942 PMCID: PMC4456427 DOI: 10.1016/j.bios.2015.04.079] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [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: 02/26/2015] [Revised: 04/15/2015] [Accepted: 04/23/2015] [Indexed: 01/29/2023]
Abstract
Age-related macular degeneration (AMD) is the leading cause of blindness in the developed world. Humanized disease models are required to develop new therapies for currently incurable forms of AMD. In this work, a tissue-on-a-chip approach was developed through combining human induced pluripotent stem cells, Electric Cell–substrate Impedance Sensing (ECIS) and reproducible electrical wounding assays to model and quantitatively study AMD. Retinal Pigment Epithelium (RPE) cells generated from a patient with an inherited macular degeneration and from an unaffected sibling were used to test the model platform on which a reproducible electrical wounding assay was conducted to model RPE damage. First, a robust and reproducible real-time quantitative monitoring over a 25-day period demonstrated the establishment and maturation of RPE layers on the microelectrode arrays. A spatially controlled RPE layer damage that mimicked cell loss in AMD disease was then initiated. Post recovery, significant differences (P<0.01) in migration rates were found between case (8.6±0.46 μm/h) and control cell lines (10.69±0.21 μm/h). Quantitative data analysis suggested this was achieved due to lower cell–substrate adhesion in the control cell line. The ECIS cell–substrate adhesion parameter (α) was found to be 7.8±0.28 Ω1/2 cm for the case cell line and 6.5±0.15 Ω1/2 cm for the control. These findings were confirmed using cell adhesion biochemical assays. The developed disease model-on-a-chip is a powerful platform for translational studies with considerable potential to investigate novel therapies by enabling real-time, quantitative and reproducible patient-specific RPE cell repair studies. hiPSC-RPE model was established and characterised on ECIS microelectrode arrays. A reproducible electrical wound healing assay was used to mimic RPE cell damage. Significant differences in migration rates were found between case and control. Cells recovered through mesenchymal migration mirrored by impedance fluctuations. Case cell line showed significantly higher adhesion than the control cell line.
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Affiliation(s)
- W Gamal
- Institute for Bioengineering, School of Engineering, The University of Edinburgh, EH9 3DW, United Kingdom
| | - S Borooah
- MRC Centre for Regenerative Medicine, The University of Edinburgh, EH16 4UU, United Kingdom; Centre for Clinical Brain Sciences, The University of Edinburgh, EH16 4SB, United Kingdom; Euan MacDonald Centre for MND Research, The University of Edinburgh, EH16 4SB, United Kingdom; Centre for Neuroregeneration, The University of Edinburgh, EH16 4SB, United Kingdom; The Anne Rowling Regenerative Neurology Clinic, The University of Edinburgh, EH16 4SB, United Kingdom
| | - S Smith
- Institute for Bioengineering, School of Engineering, The University of Edinburgh, EH9 3DW, United Kingdom
| | - I Underwood
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, EH9 3JF, United Kingdom
| | - V Srsen
- Institute for Bioengineering, School of Engineering, The University of Edinburgh, EH9 3DW, United Kingdom
| | - S Chandran
- MRC Centre for Regenerative Medicine, The University of Edinburgh, EH16 4UU, United Kingdom; Centre for Clinical Brain Sciences, The University of Edinburgh, EH16 4SB, United Kingdom; Euan MacDonald Centre for MND Research, The University of Edinburgh, EH16 4SB, United Kingdom; Centre for Neuroregeneration, The University of Edinburgh, EH16 4SB, United Kingdom; The Anne Rowling Regenerative Neurology Clinic, The University of Edinburgh, EH16 4SB, United Kingdom
| | - P O Bagnaninchi
- MRC Centre for Regenerative Medicine, The University of Edinburgh, EH16 4UU, United Kingdom.
| | - B Dhillon
- Centre for Clinical Brain Sciences, The University of Edinburgh, EH16 4SB, United Kingdom; The Anne Rowling Regenerative Neurology Clinic, The University of Edinburgh, EH16 4SB, United Kingdom; School of Clinical Sciences, The University of Edinburgh, EH16 4SB, United Kingdom
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Santos M, Rivero J, Mccullough S, Opotowsky A, Waxman A, Systrom D, Shah A, Santoro C, Esposito R, Schiano Lomoriello V, Raia R, De Palma D, Ippolito R, Ierano P, Arpino G, De Simone G, Galderisi M, Cameli M, Lisi M, Di Tommaso C, Solari M, Focardi M, Maccherini M, Henein M, Galderisi M, Mondillo S, Simova I, Katova T, Galderisi M, Pauncheva B, Vrettos A, Dawson D, Grigoratos C, Papapolychroniou C, Nihoyannopoulos P, Voilliot D, Huttin O, Vaugrenard T, Venner C, Sadoul N, Aliot E, Juilliere Y, Selton-Suty C, Hamdi I, Mahfoudhi H, Ben Mansour N, Dahmani R, Lahidheb D, Fehri W, Haouala H, Erken Pamukcu H, Gerede D, Sorgun M, Akbostanci C, Turhan S, Erol U, Voilliot D, Magne J, Dulgheru R, Kou S, Henri C, Caballero L, De Sousa C, Sprynger M, Pierard L, Lancellotti P, Panelo ML, Rodriguez-Fernandez A, Escriba-Bori S, Krol W, Konopka M, Burkhard K, Jedrzejewska I, Pokrywka A, Klusiewicz A, Chwalbinska J, Dluzniewski M, Braksator W, Elmissiri A, Eid M, Sayed I, Awadalla H, Schiano-Lomoriello V, Esposito R, Santoro C, Lo Iudice F, De Simone G, Galderisi M, Ibrahimi P, Jashari F, Johansson E, Gronlund C, Bajraktari G, Wester P, Henein M, Potluri R, Aziz A, Hooper J, Mummadi S, Uppal H, Asghar O, Chandran S, Surkova EA, Tereshina OV, Shchukin UV, Rubanenko AO, Medvedeva EA, Hamdi I, Mahfoudhi H, Ben Mansour N, Dahmani R, Lahidheb D, Fehri W, Haouala H, Krapf L, Nguyen V, Cimadevilla C, Himbert D, Brochet E, Iung B, Vahanian A, Messika-Zeitoun D, Van De Heyning CM, Magne J, Pierard L, Bruyere P, Davin L, De Maeyer C, Paelinck B, Vrints C, Lancellotti P, Bertrand P, Groenendaels Y, Vertessen V, Mullens W, Pettinari M, Gutermann H, Dion R, Verhaert D, Vandervoort P, Guven S, Sen T, Tufekcioglu O, Gucuk E, Uygur B, Kahraman E, Valuckiene Z, Jurkevicius R, Pranevicius R, Marcinkeviciene J, Zaliaduonyte-Peksiene D, Stoskute N, Zaliunas R. Club 35 Poster session 2: Thursday 4 December 2014, 08:30-18:00 * Location: Poster area. Eur Heart J Cardiovasc Imaging 2014. [DOI: 10.1093/ehjci/jeu241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Foley P, Lawler A, Chandran S, Mead G. Potential disease-modifying effects of selective serotonin reuptake inhibitors in multiple sclerosis: systematic review and meta-analysis. J Neurol Neurosurg Psychiatry 2014; 85:709-10. [PMID: 24403283 DOI: 10.1136/jnnp-2013-306829] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- P Foley
- Centre for Clinical Brain Sciences, University of Edinburgh, , Edinburgh, UK
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Magapu S, Pandian M, Parakkal, Chandran S, Neog, Nagarajan G. Cytokine milieu in the lymphatic fluid and serum of chronic pathology patients with bancroftian lymphatic filariasis. Cytotherapy 2014. [DOI: 10.1016/j.jcyt.2014.01.081] [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: 11/15/2022]
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Borooah S, Phillips M, Bilican B, Wright A, Wilmut I, Chandran S, Gamm D, Dhillon B. Using human induced pluripotent stem cells to treat retinal disease. Prog Retin Eye Res 2013; 37:163-81. [PMID: 24104210 PMCID: PMC3841575 DOI: 10.1016/j.preteyeres.2013.09.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [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: 04/19/2013] [Revised: 09/06/2013] [Accepted: 09/16/2013] [Indexed: 02/08/2023]
Abstract
The eye is an ideal target for exploiting the potential of human induced pluripotent stem cell (hiPSC) technology in order to understand disease pathways and explore novel therapeutic strategies for inherited retinal disease. The aim of this article is to map the pathway from state-of-the art laboratory-based discoveries to realising the translational potential of this emerging technique. We describe the relevance and routes to establishing hiPSCs in selected models of human retinal disease. Additionally, we define pathways for applying hiPSC technology in treating currently incurable, progressive and blinding retinal disease.
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Affiliation(s)
- S. Borooah
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
- Ophthalmology, School of Clinical Sciences, University of Edinburgh, Edinburgh EH16 4SB, UK
| | - M.J. Phillips
- Waisman Center, University of Wisconsin School of Medicine and Public Health, 1500 Highland Ave, Madison, WI 53705, USA
| | - B. Bilican
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
| | - A.F. Wright
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - I. Wilmut
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
| | - S. Chandran
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
| | - D. Gamm
- Waisman Center, University of Wisconsin School of Medicine and Public Health, 1500 Highland Ave, Madison, WI 53705, USA
- Department of Ophthalmology and Visual Sciences, McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, 1500 Highland Ave, Madison, WI 53705, USA
| | - B. Dhillon
- Ophthalmology, School of Clinical Sciences, University of Edinburgh, Edinburgh EH16 4SB, UK
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Kishore A, Popa T, Balachandran A, Backer F, Chandran S, Meunier S. P 76. Cerebellar sensory processing alterations impact motor cortical plasticity in Parkinson’s disease: Clues from dyskinetic patients. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2013.04.154] [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: 11/24/2022]
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Kishore A, Popa T, Balachandran A, Chandran S, Pradeep S, Backer F, Krishnan S, Meunier S. Cerebellar Sensory Processing Alterations Impact Motor Cortical Plasticity in Parkinson's Disease: Clues from Dyskinetic Patients. Cereb Cortex 2013; 24:2055-67. [DOI: 10.1093/cercor/bht058] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Affiliation(s)
- M. M. Freed
- Department of Surgery, University of California, San Francisco, CA
| | - F. Ramirez-Valle
- Department of Dermatology, University of California, San Francisco, CA
| | - S. Chandran
- Department of Medicine, University of California, San Francisco, CA,Corresponding author: Sindhu Chandran,
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48
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Deshpande G, Samarasam I, Banerjee S, Gnanamuthu RB, Chandran S, Mathew G. Benign esophagorespiratory fistula: a case series and a novel technique of definitive management. Dis Esophagus 2012; 26:141-7. [PMID: 22486830 DOI: 10.1111/j.1442-2050.2012.01347.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Benign esophagorespiratory fistula is a relatively rare condition in adults that poses a technical challenge to manage. This case series describes our experience in the treatment of benign esophagorespiratory fistula in 12 adults. A retrospective review of case records of 12 patients with benign esophagorespiratory fistula was done. There were eight tracheoesophageal fistulae and four bronchoesophageal fistulae. Among them, four fistulae were congenital, one was secondary to corrosive injury, three were due to foreign body (dentures), one was secondary to erosion because of prolonged endotracheal intubation, one was secondary to penetrating trauma, and two were infective in etiology. Of the 12 patients, there were nine males and three females. The mean age of presentation was 30.16 years (range 15-53 years). Nine patients had a definitive surgical intervention. The esophageal end of the fistula was managed by primary closure of the esophageal defect and reinforcement with pleural or intercostal muscle flap or a subtotal esophagectomy. The respiratory end of the fistula was dealt with by primary closure of the defect or by a novel technique of neomembranous airway formation, whereby the tracheal defect was closed with the help of a vascularized patch of the esophageal wall. The technique of this neomembranous airway formation is described in detail, and to our knowledge, this is the first time that this technique is being reported in the English literature. This technique is a novel method for definitive repair and can be considered as an option for repair of esophagorespiratory fistula with large defects.
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Affiliation(s)
- G Deshpande
- Department of General Surgery, Christian Medical College and Hospital, Vellore, Tamil Nadu, India.
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Schultz C, Willoughby S, Kumar S, Shenbaga P, Joseph G, Chandran S, Srivastava A, Chandy S, John B, Sanders P. Acute Reversal of Chronic Atrial Stretch is Associated Left Atrial Endothelial Dysfunction. Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Chandran S, Gesenberg C, Levons J, Hubert M, Raghavan K. A high-throughput spectrophotometric approach for evaluation of precipitation resistance. J Pharm Biomed Anal 2011; 56:698-704. [DOI: 10.1016/j.jpba.2011.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 07/06/2011] [Accepted: 07/11/2011] [Indexed: 11/30/2022]
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