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Withers C, Patel R, Reynolds BC, Christian M, Muorah M, Tse Y, Edwards L, Yadav P, Haq S, Hegde S, Callaghan CJ, Bamford A, Marks SD. National study on the risks of COVID-19 infection for paediatric kidney transplant recipients: a retrospective, cross-sectional study. Arch Dis Child 2024; 109:334-338. [PMID: 38336457 DOI: 10.1136/archdischild-2023-326297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 01/04/2024] [Indexed: 02/12/2024]
Abstract
INTRODUCTION During the COVID-19 pandemic, evidence emerged that immunosuppressed children were less affected by COVID-19 infections compared with immunosuppressed adults. The aim of our study was to investigate how COVID-19 infections affected paediatric kidney transplant recipients (pKTR) in the UK. METHODS Questionnaires regarding COVID-19 infection data and care of pKTR during the COVID-19 pandemic were sent to all 13 UK paediatric nephrology centres examining asymptomatic and symptomatic pKTR with positive COVID-19 PCR testing from 1 April 2020 to 1 December 2021. RESULTS 63 pKTR who were 3.1 (range 0.1-15) years post-transplantation had COVID-19 infection with positive SARS-CoV-2 PCR RNA. Classical COVID-19 symptoms were present in half of the patients; with atypical presentations including diarrhoea (13%) and lethargy (13%) also noted, while a third of patients were asymptomatic. Eighteen patients (28%) were hospitalised including five asymptomatic patients admitted for other reasons. No patients needed ventilation or intensive care admission, and one patient received supplemental oxygen. There was evidence of acute kidney injury (AKI) in 71% of patients, but no patients needed kidney replacement therapy with haemofiltration or dialysis. CONCLUSION We report 10.4% of the UK paediatric renal transplantation population had documented COVID-19 infections with positive SARS-CoV-2 PCR RNA with 28% of those affected requiring hospitalisation. The increased incidence of AKI, particularly after the first wave of the COVID-19 pandemic, was possibly due to increased testing. There was low morbidity and mortality compared with the adult population.
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Affiliation(s)
- Charlotte Withers
- NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London Great Ormond Street Institute of Child Health, London, UK
- Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Rishil Patel
- NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London Great Ormond Street Institute of Child Health, London, UK
- Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Ben C Reynolds
- Paediatric Renal Unit, Royal Hospital for Children, Glasgow, UK
| | | | - Mordi Muorah
- Department of Paediatric Nephrology, Birmingham Children's Hospital NHS Foundation Trust, Birmingham, UK
| | - Yincent Tse
- Department of Paediatric Nephrology, Great North Children's Hospital, Newcastle Upon Tyne, UK
| | - Liz Edwards
- Royal Manchester Children's Hospital, Manchester, Manchester, UK
| | - Pallavi Yadav
- Department of Paediatric Nephrology, Leeds Teaching Hospitals NHS Trust, Leeds, Leeds, UK
| | - Shuman Haq
- Department of Paediatric Nephrology, Southampton Children's Hospital, Southampton, UK
| | | | - Chris J Callaghan
- Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Alasdair Bamford
- Deparment of Paediatric Infectious Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Stephen D Marks
- NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London Great Ormond Street Institute of Child Health, London, UK
- Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
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Marriott AE, Dagley JL, Hegde S, Steven A, Fricks C, DiCosty U, Mansour A, Campbell EJ, Wilson CM, Gusovsky F, Ward SA, Hong WD, O'Neill P, Moorhead A, McCall S, McCall JW, Taylor MJ, Turner JD. Dirofilariasis mouse models for heartworm preclinical research. Front Microbiol 2023; 14:1208301. [PMID: 37426014 PMCID: PMC10324412 DOI: 10.3389/fmicb.2023.1208301] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 05/30/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Dirofilariasis, including heartworm disease, is a major emergent veterinary parasitic infection and a human zoonosis. Currently, experimental infections of cats and dogs are used in veterinary heartworm preclinical drug research. Methods As a refined alternative in vivo heartworm preventative drug screen, we assessed lymphopenic mouse strains with ablation of the interleukin-2/7 common gamma chain (γc) as susceptible to the larval development phase of Dirofilaria immitis. Results Non-obese diabetic (NOD) severe combined immunodeficiency (SCID)γc-/- (NSG and NXG) and recombination-activating gene (RAG)2-/-γc-/- mouse strains yielded viable D. immitis larvae at 2-4 weeks post-infection, including the use of different batches of D. immitis infectious larvae, different D. immitis isolates, and at different laboratories. Mice did not display any clinical signs associated with infection for up to 4 weeks. Developing larvae were found in subcutaneous and muscle fascia tissues, which is the natural site of this stage of heartworm in dogs. Compared with in vitro-propagated larvae at day 14, in vivo-derived larvae had completed the L4 molt, were significantly larger, and contained expanded Wolbachia endobacteria titres. We established an ex vivo L4 paralytic screening system whereby assays with moxidectin or levamisole highlighted discrepancies in relative drug sensitivities in comparison with in vitro-reared L4 D. immitis. We demonstrated effective depletion of Wolbachia by 70%-90% in D. immitis L4 following 2- to 7-day oral in vivo exposures of NSG- or NXG-infected mice with doxycycline or the rapid-acting investigational drug, AWZ1066S. We validated NSG and NXG D. immitis mouse models as a filaricide screen by in vivo treatments with single injections of moxidectin, which mediated a 60%-88% reduction in L4 larvae at 14-28 days. Discussion Future adoption of these mouse models will benefit end-user laboratories conducting research and development of novel heartworm preventatives via increased access, rapid turnaround, and reduced costs and may simultaneously decrease the need for experimental cat or dog use.
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Affiliation(s)
- A. E. Marriott
- Department of Tropical Disease Biology, Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - J. L. Dagley
- Department of Tropical Disease Biology, Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - S. Hegde
- Department of Tropical Disease Biology, Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - A. Steven
- Department of Tropical Disease Biology, Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - C. Fricks
- TRS Laboratories Inc, Athens, GA, United States
| | - U. DiCosty
- TRS Laboratories Inc, Athens, GA, United States
| | - A. Mansour
- TRS Laboratories Inc, Athens, GA, United States
| | - E. J. Campbell
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - C. M. Wilson
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - F. Gusovsky
- Eisai Global Health, Cambridge, MA, United States
| | - S. A. Ward
- Department of Tropical Disease Biology, Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - W. D. Hong
- Department of Chemistry, University of Liverpool, Liverpool, United Kingdom
| | - P. O'Neill
- Department of Chemistry, University of Liverpool, Liverpool, United Kingdom
| | - A. Moorhead
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - S. McCall
- TRS Laboratories Inc, Athens, GA, United States
| | - J. W. McCall
- TRS Laboratories Inc, Athens, GA, United States
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - M. J. Taylor
- Department of Tropical Disease Biology, Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - J. D. Turner
- Department of Tropical Disease Biology, Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
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3
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Bierzynska A, Bull K, Miellet S, Dean P, Neal C, Colby E, McCarthy HJ, Hegde S, Sinha MD, Bugarin Diz C, Stirrups K, Megy K, Mapeta R, Penkett C, Marsh S, Forrester N, Afzal M, Stark H, BioResource NIHR, Williams M, Welsh GI, Koziell AB, Hartley PS, Saleem MA. Exploring the relevance of NUP93 variants in steroid-resistant nephrotic syndrome using next generation sequencing and a fly kidney model. Pediatr Nephrol 2022; 37:2643-2656. [PMID: 35211795 PMCID: PMC9489583 DOI: 10.1007/s00467-022-05440-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 12/10/2021] [Accepted: 12/21/2021] [Indexed: 10/24/2022]
Abstract
BACKGROUND Variants in genes encoding nuclear pore complex (NPC) proteins are a newly identified cause of paediatric steroid-resistant nephrotic syndrome (SRNS). Recent reports describing NUP93 variants suggest these could be a significant cause of paediatric onset SRNS. We report NUP93 cases in the UK and demonstrate in vivo functional effects of Nup93 depletion in a fly (Drosophila melanogaster) nephrocyte model. METHODS Three hundred thirty-seven paediatric SRNS patients from the National cohort of patients with Nephrotic Syndrome (NephroS) were whole exome and/or whole genome sequenced. Patients were screened for over 70 genes known to be associated with Nephrotic Syndrome (NS). D. melanogaster Nup93 knockdown was achieved by RNA interference using nephrocyte-restricted drivers. RESULTS Six novel homozygous and compound heterozygous NUP93 variants were detected in 3 sporadic and 2 familial paediatric onset SRNS characterised histologically by focal segmental glomerulosclerosis (FSGS) and progressing to kidney failure by 12 months from clinical diagnosis. Silencing of the two orthologs of human NUP93 expressed in D. melanogaster, Nup93-1, and Nup93-2 resulted in significant signal reduction of up to 82% in adult pericardial nephrocytes with concomitant disruption of NPC protein expression. Additionally, nephrocyte morphology was highly abnormal in Nup93-1 and Nup93-2 silenced flies surviving to adulthood. CONCLUSION We expand the spectrum of NUP93 variants detected in paediatric onset SRNS and demonstrate its incidence within a national cohort. Silencing of either D. melanogaster Nup93 ortholog caused a severe nephrocyte phenotype, signaling an important role for the nucleoporin complex in podocyte biology. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Agnieszka Bierzynska
- Bristol Renal and Children’s Renal Unit, Bristol Medical School, University of Bristol, Whitson Street, Bristol, BS1 3NY UK
| | - Katherine Bull
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Sara Miellet
- Department of Life and Environmental Science, Bournemouth University, Talbot Campus, Fern Barrow, Poole, Dorset BH12 5BB England, UK
- Illawarra Health and Medical Research Institute, Molecular Horizons and School of Medicine, University of Wollongong, Wollongong, Australia
| | - Philip Dean
- Bristol Genetics Laboratory, North Bristol National Health Service Trust, Bristol, UK
| | - Chris Neal
- Bristol Renal and Children’s Renal Unit, Bristol Medical School, University of Bristol, Whitson Street, Bristol, BS1 3NY UK
| | - Elizabeth Colby
- Bristol Renal and Children’s Renal Unit, Bristol Medical School, University of Bristol, Whitson Street, Bristol, BS1 3NY UK
| | - Hugh J. McCarthy
- Bristol Renal and Children’s Renal Unit, Bristol Medical School, University of Bristol, Whitson Street, Bristol, BS1 3NY UK
- School of Medicine, University of Sydney and Children’s Hospital at Westmead, Westmead, Australia
| | - Shivaram Hegde
- Children’s Kidney Centre, University Hospital of Wales, Cardiff, UK
| | - Manish D. Sinha
- Department of Paediatric Nephrology, Evelina London Children’s Hospital, Guy’s and St, Thomas’ Hospital, London, UK
| | - Carmen Bugarin Diz
- School of Immunology and Microbial Sciences, Faculty of Life Sciences and Medicine, King’s College London, London, SE1 7EH UK
| | - Kathleen Stirrups
- NIHR BioResource, Cambridge University Hospitals, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
| | - Karyn Megy
- NIHR BioResource, Cambridge University Hospitals, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
- Centre for Genomics Research, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | - Rutendo Mapeta
- NIHR BioResource, Cambridge University Hospitals, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA UK
| | - Chris Penkett
- NIHR BioResource, Cambridge University Hospitals, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
| | - Sarah Marsh
- Bristol Genetics Laboratory, North Bristol National Health Service Trust, Bristol, UK
| | - Natalie Forrester
- Illawarra Health and Medical Research Institute, Molecular Horizons and School of Medicine, University of Wollongong, Wollongong, Australia
| | - Maryam Afzal
- Bristol Renal and Children’s Renal Unit, Bristol Medical School, University of Bristol, Whitson Street, Bristol, BS1 3NY UK
| | - Hannah Stark
- NIHR BioResource, Cambridge University Hospitals, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
| | - NIHR BioResource
- NIHR BioResource, Cambridge University Hospitals, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
| | - Maggie Williams
- Bristol Genetics Laboratory, North Bristol National Health Service Trust, Bristol, UK
| | - Gavin I. Welsh
- Bristol Renal and Children’s Renal Unit, Bristol Medical School, University of Bristol, Whitson Street, Bristol, BS1 3NY UK
| | - Ania B. Koziell
- Department of Paediatric Nephrology, Evelina London Children’s Hospital, Guy’s and St, Thomas’ Hospital, London, UK
- School of Immunology and Microbial Sciences, Faculty of Life Sciences and Medicine, King’s College London, London, SE1 7EH UK
| | - Paul S. Hartley
- Department of Life and Environmental Science, Bournemouth University, Talbot Campus, Fern Barrow, Poole, Dorset BH12 5BB England, UK
| | - Moin A. Saleem
- Bristol Renal and Children’s Renal Unit, Bristol Medical School, University of Bristol, Whitson Street, Bristol, BS1 3NY UK
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Marron T, Maier B, LaMarche N, Hegde S, Belabed M, Mattiuz R, Hennequin C, LeBerichel J, Park M, Hall N, Ogrady D, Fitzgerald B, Gomez J, Doroshow D, Veluswamy R, Rolfo C, Smith C, Rohs N, Yankelevitz D, Chaddha U, Harkin T, Beasley M, Hirsch F, Merad M. P2.12-05 Cancer and Atopy: Parallel Drivers? IL-4 Blockade Synergizes with PD-L1 Blockade to Reverse Type-2Mediated Immunosuppression. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.253] [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: 10/14/2022]
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5
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Afentou N, Frew E, Mehta S, Ives NJ, Woolley RL, Brettell EA, Khan AR, Milford DV, Bockenhauer D, Saleem MA, Hall AS, Koziell A, Maxwell H, Hegde S, Finlay E, Gilbert RD, Jones C, McKeever K, Cook W, Webb NJA, Christian MT. Economic Evaluation of Using Daily Prednisolone versus Placebo at the Time of an Upper Respiratory Tract Infection for the Management of Children with Steroid-Sensitive Nephrotic Syndrome: A Model-Based Analysis. Pharmacoecon Open 2022; 6:605-617. [PMID: 35733076 PMCID: PMC9283622 DOI: 10.1007/s41669-022-00334-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 03/28/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Childhood steroid-sensitive nephrotic syndrome is a frequently relapsing disease with significant short- and long-term complications, leading to high healthcare costs and reduced quality of life for patients. The majority of relapses are triggered by upper respiratory tract infections (URTIs) and evidence shows that daily low-dose prednisolone at the time of infection may reduce the risk of relapse. OBJECTIVE The aim of this study was to assess the cost effectiveness of a 6-day course of low-dose prednisolone at the start of a URTI when compared with placebo. METHODS A state-transition Markov model was developed to conduct a cost-utility analysis with the outcome measured in quality-adjusted life-years (QALYs). Resource use and outcome data were derived from the PREDNOS2 trial. The analysis was performed from a UK National Health Service perspective and the results were extrapolated to adulthood. Model parameter and structural uncertainty were assessed using sensitivity analyses. RESULTS The base-case results showed that administering low-dose prednisolone at the time of a URTI generated more QALYs and a lower mean cost at 1 year compared with placebo. In the long-term, low-dose prednisolone was associated with a cost saving (£176) and increased effectiveness (0.01 QALYs) compared with placebo and thus remained the dominant treatment option. These findings were robust to all sensitivity analyses. CONCLUSION A 6-day course of low-dose prednisolone at the time of a URTI in children with steroid-sensitive nephrotic syndrome has the potential to reduce healthcare costs and improve quality of life compared with placebo.
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Affiliation(s)
- Nafsika Afentou
- Health Economics Unit, University of Birmingham, Birmingham, UK
| | - Emma Frew
- Health Economics Unit, University of Birmingham, Birmingham, UK.
| | - Samir Mehta
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - Natalie J Ives
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - Rebecca L Woolley
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | | | - Adam R Khan
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - David V Milford
- Department of Paediatric Nephrology, Birmingham Children's Hospital, Birmingham, UK
| | - Detlef Bockenhauer
- Department of Renal Medicine, University College London, London, UK
- Department of Paediatric Nephrology, Great Ormond Street Hospital for Children, London, UK
| | - Moin A Saleem
- School of Clinical Sciences, University of Bristol, Bristol, UK
- Department of Paediatric Nephrology, Bristol Royal Hospital for Children, Bristol, UK
| | | | - Ania Koziell
- Child Health Clinical Academic Group, King's College London, London, UK
- Department of Paediatric Nephrology, Evelina Children's Hospital, London, UK
| | - Heather Maxwell
- Department of Paediatric Nephrology, Royal Hospital for Sick Children, Glasgow, UK
| | - Shivaram Hegde
- Department of Paediatric Nephrology, University Hospital of Wales, Cardiff, UK
| | - Eric Finlay
- Department of Paediatric Nephrology, Leeds Children's Hospital, Leeds, UK
| | - Rodney D Gilbert
- Department of Paediatric Nephrology, Southampton Children's Hospital, Southampton, UK
| | - Caroline Jones
- Department of Paediatric Nephrology, Alder Hey Children's Hospital, Liverpool, UK
| | - Karl McKeever
- Department of Paediatric Nephrology, Royal Hospital for Sick Children, Belfast, UK
| | - Wendy Cook
- Nephrotic Syndrome Trust (NeST), Taunton, UK
| | - Nicholas J A Webb
- Department of Paediatric Nephrology, University of Manchester, Manchester, UK
- Academic Health Science Centre, Royal Manchester Children's Hospital, Manchester, UK
| | - Martin T Christian
- Department of Paediatric Nephrology, Nottingham Children's Hospital, Nottingham, UK
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6
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Plumb L, Magadi W, Casula A, Reynolds BC, Convery M, Haq S, Hegde S, Lunn A, Malina M, Morgan H, Muorah M, Tyerman K, Sinha MD, Wallace D, Inward C, Marks S, Nitsch D, Medcalf J. Advanced chronic kidney disease among UK children. Arch Dis Child 2022; 107:archdischild-2021-323686. [PMID: 35732469 DOI: 10.1136/archdischild-2021-323686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The UK Renal Registry currently collects information on UK children with kidney failure requiring long-term kidney replacement therapy (KRT), which supports disease surveillance and auditing of care and outcomes; however, data are limited on children with chronic kidney disease (CKD) not on KRT. METHODS In March 2020, all UK Paediatric Nephrology centres submitted data on children aged <16 years with severely reduced kidney function as of December 2019, defined as an estimated glomerular filtration rate <30 mL/min/1.73 m2. RESULTS In total, 1031 children had severe CKD, the majority of whom (80.7%) were on KRT. The overall prevalence was 81.2 (95% CI 76.3 to 86.3) per million of the age-related population. CONCLUSIONS The prevalence of severe CKD among UK children is largely due to a high proportion of children on long-term KRT. Expanding data capture to include children with CKD before reaching failure will provide greater understanding of the CKD burden in childhood.
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Affiliation(s)
- Lucy Plumb
- UK Renal Registry, UK Kidney Association, Bristol, UK
- Population Health Sciences, University of Bristol Medical School, Bristol, UK
| | - Winnie Magadi
- UK Renal Registry, UK Kidney Association, Bristol, UK
| | - Anna Casula
- UK Renal Registry, UK Kidney Association, Bristol, UK
| | - Ben C Reynolds
- Department of Paediatric Nephrology, Royal Hospital for Children Glasgow, Glasgow, UK
| | - Mairead Convery
- Department of Paediatric Nephrology, Royal Belfast Hospital for Sick Children, Belfast, UK
| | - Shuman Haq
- Department of Paediatric Nephrology, Southampton Children's Hospital, Southampton, UK
| | - Shivaram Hegde
- Department of Paediatric Nephrology, University Hospital of Wales, Cardiff, UK
| | - Andrew Lunn
- Department of Paediatric Nephrology, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Michal Malina
- National Renal Complement Therapeutics Centre, Great North Children's Hospital, Newcastle Upon Tyne, UK
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Henry Morgan
- Department of Paediatric Nephrology, Alder Hey Children's NHS Foundation Trust, Liverpool, UK
| | - Mordi Muorah
- Department of Paediatric Nephrology, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Kay Tyerman
- Department of Paediatric Nephrology, Leeds Children's Hospital, Leeds, UK
| | - Manish D Sinha
- Department of Paediatric Nephrology, Evelina London Children's Hospital, London, UK
| | - Dean Wallace
- Department of Paediatric Nephrology, Royal Manchester Children's Hospital, Manchester, UK
| | - Carol Inward
- Department of Paediatric Nephrology, University Hospitals Bristol and Weston NHS Foundation Trust, Bristol, UK
| | - Stephen Marks
- Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
- NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Dorothea Nitsch
- UK Renal Registry, UK Kidney Association, Bristol, UK
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
| | - James Medcalf
- UK Renal Registry, UK Kidney Association, Bristol, UK
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
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7
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Christian MT, Webb NJA, Mehta S, Woolley RL, Afentou N, Frew E, Brettell EA, Khan AR, Milford DV, Bockenhauer D, Saleem MA, Hall AS, Koziell A, Maxwell H, Hegde S, Prajapati H, Gilbert RD, Jones C, McKeever K, Cook W, Ives N. Evaluation of Daily Low-Dose Prednisolone During Upper Respiratory Tract Infection to Prevent Relapse in Children With Relapsing Steroid-Sensitive Nephrotic Syndrome: The PREDNOS 2 Randomized Clinical Trial. JAMA Pediatr 2022; 176:236-243. [PMID: 34928294 PMCID: PMC8689426 DOI: 10.1001/jamapediatrics.2021.5189] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
IMPORTANCE In children with corticosteroid-sensitive nephrotic syndrome, many relapses are triggered by upper respiratory tract infections. Four small studies found that administration of daily low-dose prednisolone for 5 to 7 days at the time of an upper respiratory tract infection reduced the risk of relapse, but the generalizability of their findings is limited by location of the studies and selection of study population. OBJECTIVE To investigate the use of daily low-dose prednisolone for the treatment of upper respiratory tract infection-related relapses. DESIGN, SETTING, AND PARTICIPANTS This double-blind, placebo-controlled randomized clinical trial (Prednisolone in Nephrotic Syndrome [PREDNOS] 2) evaluated 365 children with relapsing steroid-sensitive nephrotic syndrome with and without background immunosuppressive treatment at 122 pediatric departments in the UK from February 1, 2013, to January 31, 2020. Data from the modified intention-to-treat population were analyzed from July 1, 2020, to December 31, 2020. INTERVENTIONS At the start of an upper respiratory tract infection, children received 6 days of prednisolone, 15 mg/m2 daily, or matching placebo preparation. Those already taking alternate-day prednisolone rounded their daily dose using trial medication to the equivalent of 15 mg/m2 daily or their alternate-day dose, whichever was greater. MAIN OUTCOMES AND MEASURES The primary outcome was the incidence of first upper respiratory tract infection-related relapse. Secondary outcomes included overall rate of relapse, changes in background immunosuppressive treatment, cumulative dose of prednisolone, rates of serious adverse events, incidence of corticosteroid adverse effects, and quality of life. RESULTS The modified intention-to-treat analysis population comprised 271 children (mean [SD] age, 7.6 [3.5] years; 174 [64.2%] male), with 134 in the prednisolone arm and 137 in the placebo arm. The number of patients experiencing an upper respiratory tract infection-related relapse was 56 of 131 (42.7%) in the prednisolone arm and 58 of 131 (44.3%) in the placebo arm (adjusted risk difference, -0.02; 95% CI, -0.14 to 0.10; P = .70). No evidence was found that the treatment effect differed according to background immunosuppressive treatment. No significant differences were found in secondary outcomes between the treatment arms. A post hoc subgroup analysis assessing the primary outcome in 54 children of South Asian ethnicity (risk ratio, 0.66; 95% CI, 0.40-1.10) vs 208 children of other ethnicity (risk ratio, 1.11; 95% CI, 0.81-1.54) found no difference in efficacy of intervention in those of South Asian ethnicity (test for interaction P = .09). CONCLUSIONS AND RELEVANCE The results of PREDNOS 2 suggest that administering 6 days of daily low-dose prednisolone at the time of an upper respiratory tract infection does not reduce the risk of relapse of nephrotic syndrome in children in the UK. Further work is needed to investigate interethnic differences in treatment response. TRIAL REGISTRATION isrctn.org Identifier: ISRCTN10900733; EudraCT 2012-003476-39.
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Affiliation(s)
- Martin T. Christian
- Department of Paediatric Nephrology, Nottingham Children’s Hospital, Nottingham, UK
| | - Nicholas J. A. Webb
- Department of Paediatric Nephrology, University of Manchester, Manchester Academic Health Science Centre, Royal Manchester Children’s Hospital, Manchester, UK
| | - Samir Mehta
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - Rebecca L. Woolley
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - Nafsika Afentou
- Health Economics Unit, University of Birmingham, Birmingham, UK
| | - Emma Frew
- Health Economics Unit, University of Birmingham, Birmingham, UK
| | | | - Adam R. Khan
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - David V. Milford
- Department of Paediatric Nephrology, Birmingham Children’s Hospital, Birmingham, UK
| | - Detlef Bockenhauer
- Department of Renal Medicine, University College London, London, UK,Department of Paediatric Nephrology, Great Ormond Street Hospital for Children, London, UK
| | - Moin A. Saleem
- Department of Glomerular Cell Biology, Bristol Medical School, University of Bristol, Bristol, UK,Department of Paediatric Nephrology, Bristol Royal Hospital for Children, Bristol, UK
| | | | - Ania Koziell
- Child Health Clinical Academic Group, King’s College London, London, UK,Department of Paediatric Nephrology, Evelina Children’s Hospital, London, UK
| | - Heather Maxwell
- Department of Paediatric Nephrology, Royal Hospital for Sick Children, Glasgow, UK
| | - Shivaram Hegde
- Department of Paediatric Nephrology, University Hospital of Wales, Cardiff, UK
| | - Hitesh Prajapati
- Department of Paediatric Nephrology, Leeds Children’s Hospital, Leeds, UK
| | - Rodney D. Gilbert
- Department of Paediatric Nephrology, Southampton Children’s Hospital, Southampton, UK
| | - Caroline Jones
- Department of Paediatric Nephrology, Alder Hey Children’s Hospital, Liverpool, UK
| | - Karl McKeever
- Department of Paediatric Nephrology, Royal Hospital for Sick Children, Belfast, UK
| | | | - Natalie Ives
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
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8
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Onkaramurthy M, Vishwakarma KK, Singh P, Hegde S, Azeemuddin MM, Rafiq M, Babu UV. Herbal Formulations Ameliorates Chronic Venous Insufficiency, Venotonicity and Elastase Inhibition in the Management of Varicose Veins: A Preclinical Study. Indian J Pharm Sci 2022. [DOI: 10.36468/pharmaceutical-sciences.1000] [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: 11/22/2022] Open
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9
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Bhardwaj P, Thattaruparambil VP, Vellaisamy G, Mahadevaiah S, Hegde S. Gastric teratoma presenting as melena in the newborn: A case report. J Neonatal Perinatal Med 2022; 15:667-669. [PMID: 35694937 DOI: 10.3233/npm-210931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Melena is reported in 1 of 350 to 400 new-borns. Significant upper gastrointestinal bleeding in a neonate with an antenatally diagnosed abdominal mass has not been reported before. This case highlights an unusual presentation of a gastric teratoma and proposes a probable embryological explanation for the site of occurrence.
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Affiliation(s)
- P Bhardwaj
- Department of Pediatric Surgery, St. John's Medical College Hospital, Bengaluru, India
| | - V P Thattaruparambil
- Department of Pediatric Surgery, St. John's Medical College Hospital, Bengaluru, India
| | - G Vellaisamy
- Department of Pathology, St. John's Medical College, Bengaluru, India
| | - S Mahadevaiah
- Department of Pediatric Surgery, St. John's Medical College Hospital, Bengaluru, India
| | - S Hegde
- Department of Pediatric Surgery, St. John's Medical College Hospital, Bengaluru, India
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10
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Christian MT, Webb NJA, Woolley RL, Afentou N, Mehta S, Frew E, Brettell EA, Khan AR, Milford DV, Bockenhauer D, Saleem MA, Hall AS, Koziell A, Maxwell H, Hegde S, Finlay ER, Gilbert RD, Jones C, McKeever K, Cook W, Ives N. Daily low-dose prednisolone to prevent relapse of steroid-sensitive nephrotic syndrome in children with an upper respiratory tract infection: PREDNOS2 RCT. Health Technol Assess 2022; 26:1-94. [DOI: 10.3310/wtfc5658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Background
Most children with steroid-sensitive nephrotic syndrome have relapses that are triggered by upper respiratory tract infections. Four small trials, mostly in children already taking maintenance corticosteroid in countries of different upper respiratory tract infection epidemiology, showed that giving daily low-dose prednisone/prednisolone for 5–7 days during an upper respiratory tract infection reduces the risk of relapse.
Objectives
To determine if these findings were replicated in a large UK population of children with relapsing steroid-sensitive nephrotic syndrome on different background medication or none.
Design
A randomised double-blind placebo-controlled trial, including a cost-effectiveness analysis.
Setting
A total of 122 UK paediatric departments, of which 91 recruited patients.
Participants
A total of 365 children with relapsing steroid-sensitive nephrotic syndrome (mean age 7.6 ± 3.5 years) were randomised (1 : 1) according to a minimisation algorithm based on background treatment. Eighty children completed 12 months of follow-up without an upper respiratory tract infection. Thirty-two children were withdrawn from the trial (14 prior to an upper respiratory tract infection), leaving a modified intention-to-treat analysis population of 271 children (134 and 137 children in the prednisolone and placebo arms, respectively).
Interventions
At the start of an upper respiratory tract infection, children received 6 days of prednisolone (15 mg/m2) or an equivalent dose of placebo.
Main outcome measures
The primary outcome was the incidence of first upper respiratory tract infection-related relapse following any upper respiratory tract infection over 12 months. The secondary outcomes were the overall rate of relapse, changes in background treatment, cumulative dose of prednisolone, rates of serious adverse events, incidence of corticosteroid adverse effects, change in Achenbach Child Behaviour Checklist score and quality of life. Analysis was by intention-to-treat principle. The cost-effectiveness analysis used trial data and a decision-analytic model to estimate quality-adjusted life-years and costs at 1 year, which were then extrapolated over 16 years.
Results
There were 384 upper respiratory tract infections and 82 upper respiratory tract infection-related relapses in the prednisolone arm, and 407 upper respiratory tract infections and 82 upper respiratory tract infection-related relapses in the placebo arm. The number of patients experiencing an upper respiratory tract infection-related relapse was 56 (42.7%) and 58 (44.3%) in the prednisolone and placebo arms, respectively (adjusted risk difference –0.024, 95% confidence interval –0.14 to 0.09; p = 0.70). There was no evidence that the treatment effect differed when data were analysed according to background treatment. There were no significant differences in secondary outcomes between treatment arms. Giving daily prednisolone at the time of an upper respiratory tract infection was associated with increased quality-adjusted life-years (0.9427 vs. 0.9424) and decreased average costs (£252 vs. £254), when compared with standard care. The cost saving was driven by background therapy and hospitalisations after relapse. The finding was robust to sensitivity analysis.
Limitations
A larger number of children than expected did not have an upper respiratory tract infection and the sample size attrition rate was adjusted accordingly during the trial.
Conclusions
The clinical analysis indicated that giving 6 days of daily low-dose prednisolone at the time of an upper respiratory tract infection does not reduce the risk of relapse of steroid-sensitive nephrotic syndrome in UK children. However, there was an economic benefit from costs associated with background therapy and relapse, and the health-related quality-of-life impact of having a relapse.
Future work
Further work is needed to investigate the clinical and health economic impact of relapses, interethnic differences in treatment response, the effect of different corticosteroid regimens in treating relapses, and the pathogenesis of individual viral infections and their effect on steroid-sensitive nephrotic syndrome.
Trial registration
Current Controlled Trials ISRCTN10900733 and EudraCT 2012-003476-39.
Funding
This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 26, No. 3. See the NIHR Journals Library website for further project information.
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Affiliation(s)
- Martin T Christian
- Department of Paediatric Nephrology, Nottingham Children’s Hospital, Nottingham, UK
| | - Nicholas JA Webb
- Department of Paediatric Nephrology, University of Manchester, Academic Health Science Centre, Royal Manchester Children’s Hospital, Manchester, UK
| | - Rebecca L Woolley
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - Nafsika Afentou
- Health Economics Unit, University of Birmingham, Birmingham, UK
| | - Samir Mehta
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - Emma Frew
- Health Economics Unit, University of Birmingham, Birmingham, UK
| | | | - Adam R Khan
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - David V Milford
- Department of Paediatric Nephrology, Birmingham Children’s Hospital, Birmingham, UK
| | - Detlef Bockenhauer
- Department of Renal Medicine, University College London, Department of Paediatric Nephrology, Great Ormond Street Hospital for Children, London, UK
| | - Moin A Saleem
- School of Clinical Sciences, University of Bristol, Department of Paediatric Nephrology, Bristol Royal Hospital for Children, Bristol, UK
| | | | - Ania Koziell
- Child Health Clinical Academic Group, King’s College London, Department of Paediatric Nephrology, Evelina London Children’s Hospital, London, UK
| | - Heather Maxwell
- Department of Paediatric Nephrology, Royal Hospital for Sick Children, Glasgow, UK
| | - Shivaram Hegde
- Department of Paediatric Nephrology, University Hospital of Wales, Cardiff, UK
| | - Eric R Finlay
- Department of Paediatric Nephrology, Leeds Children’s Hospital, Leeds, UK
| | - Rodney D Gilbert
- Department of Paediatric Nephrology, Southampton Children’s Hospital, Southampton, UK
| | - Caroline Jones
- Department of Paediatric Nephrology, Alder Hey Children’s Hospital, Liverpool, UK
| | - Karl McKeever
- Department of Paediatric Nephrology, Royal Hospital for Sick Children, Belfast, UK
| | - Wendy Cook
- Nephrotic Syndrome Trust (NeST), Taunton, UK
| | - Natalie Ives
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
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11
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Dudley J, Christian M, Andrews A, Andrews N, Baker J, Boyle S, Convery M, Gamston F, Garcia M, Haq S, Hegde S, Holt R, Jones H, Khan S, McCaughan J, Milford D, Pickles C, Reynolds B, Sathyanarayana V, Stojanovic J, Tse Y, Wallace D, Walsh G, Ware N, Williams A, Yadav P, Marks S. Clinical practice guidelines standardisation of immunosuppressive and anti-infective drug regimens in UK paediatric renal transplantation: the harmonisation programme. BMC Nephrol 2021; 22:312. [PMID: 34530758 PMCID: PMC8447621 DOI: 10.1186/s12882-021-02460-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/25/2021] [Indexed: 12/04/2022] Open
Affiliation(s)
- Jan Dudley
- Consultant Paediatric Nephrologist, Bristol, UK.
| | | | | | | | | | | | - Mairead Convery
- Consultant Paediatric Nephrologist, Belfast, Northern Ireland
| | | | - Martin Garcia
- Specialist trainee in Paediatric Nephrology, Evelina, London, UK
| | - Shuman Haq
- Consultant Paediatric Nephrologist, Southampton, UK
| | | | - Richard Holt
- Consultant Paediatric Nephrologist, Liverpool, UK
| | - Helen Jones
- Consultant Paediatric Nephrologist, Evelina, London, UK
| | | | | | | | | | | | | | | | - Yincent Tse
- Consultant Paediatric Nephrologist, Newcastle, UK
| | - Dean Wallace
- Consultant Paediatric Nephrologist, Manchester, UK
| | | | - Nick Ware
- Consultant Paediatric Nephrologist, Evelina, London, UK
| | | | | | - Stephen Marks
- Consultant Paediatric Nephrologist, Great Ormond St, London, UK
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12
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Christian M, Webb N, Mehta S, Nafsika A, Woolley R, Frew E, Brettell E, Khan A, Milford D, Bockenhauer D, Saleem MA, Hall A, Koziell A, Maxwell H, Hegde S, Prajapati H, Gilbert R, Jones C, McKeever K, Cook W, Ives N. FC 132SHORT COURSE DAILY LOW-DOSE PREDNISOLONE AT THE TIME OF UPPER RESPIRATORY TRACT INFECTION (URTI) IN NON-SELECTED CHILDREN WITH RELAPSING STEROID SENSITIVE NEPHROTIC SYNDROME DOES NOT PREVENT URTI-RELATED RELAPSE: THE PREDNOS 2 TRIAL. Nephrol Dial Transplant 2021. [DOI: 10.1093/ndt/gfab134.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background and Aims
At least 80% of children with steroid sensitive nephrotic syndrome (SSNS) have relapses and many are triggered by upper respiratory tract infections (URTIs). Previous small studies (4 studies, 232 patients in total), mostly in children already taking maintenance corticosteroid in countries where URTI epidemiology is different to Europe, showed that giving daily low-dose prednisolone for 5-7 days during an URTI reduces the risk of relapse. The objective of the PREDNOS 2 trial was to determine if these findings were replicated in a large UK population of children with relapsing SSNS on different background medication or none.
Method
A randomised, double-blind, placebo-controlled trial, including a model-based economic evaluation was carried out in 122 UK paediatric departments. Between February 2013 and January 2019, 365 children with relapsing SSNS (mean age: 7.6 ± 3.5 y) were recruited from 91 sites and randomised (1:1) according to a minimisation algorithm based on background treatment (no background treatment; low-dose prednisolone only; low-dose prednisolone and other immunosuppression; other immunosuppression only). At the start of an URTI, children received 6 days of prednisolone 15 mg/m2 or matching preparation of placebo. Those already taking alternate day prednisolone rounded their daily dose using trial medication to the equivalent of 15 mg/m2 or their alternate-day dose, whichever was the greater. The primary outcome was the incidence of first URTI-related relapse (URR) following any URTI over 12 months. Secondary outcomes were the overall rate of relapse, changes in background treatment, cumulative dose of prednisolone, rates of serious adverse events, incidence of corticosteroid adverse effects, change in Achenbach Child Behaviour Checklist score and quality of life. Analysis was by intention to treat. The economic evaluation used trial data and a decision-analytic model to estimate Quality-Adjusted-Life-Years (QALYs) and costs at 1-year, which were then extrapolated over 16 years.
Results
80 children completed 12 m follow-up without an URTI. Consent was withdrawn for 32 children, 14 prior to an URTI, leaving a modified intention to treat analysis population of 271 children (134 and 137 in prednisolone and placebo arms respectively). There were 384 URTIs and 82 URRs in the prednisolone arm, and 407 URTIs and 82 URRs in the placebo arm. The number of patients experiencing a URR was 56 (42.7%) and 58 (44.3%) in the prednisolone and placebo arms respectively (adjusted risk difference: -0.024, 95% CI: -0.14 to 0.095; P=0.7). There was no evidence that the treatment effect differed when data were analysed according to background treatment. There were no significant differences in secondary outcomes between treatment arms. A post-hoc subgroup analysis assessing primary outcome in 58 children of South Asian ethnicity (RR 0.66, 95% CI: 0.396 to 1.105) versus 213 of other ethnicity (RR 1.11, 95% CI: 0.806 to 1.535) showed possible efficacy of intervention in those of South Asian ethnicity (test for interaction P=0.09). Giving daily prednisolone at the time of an URTI was found to increase QALYs and decrease overall costs, when compared to standard care, a finding that was robust to sensitivity analysis.
Conclusion
In a large and methodologically-robust study, PREDNOS 2 has shown that giving 6 days of daily low-dose prednisolone at the time of an URTI does not reduce the risk of relapse of nephrotic syndrome in UK children, but could offer a cost-effective use of health care resources. Further work is needed to investigate inter-ethnic differences in treatment response, and the pathogenesis of individual viral infections and their effect on nephrotic syndrome.
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Affiliation(s)
- Martin Christian
- Nottingham Children's Hospital, Paediatric Nephrology, Nottingham, United Kingdom
| | - Nicholas Webb
- Manchester Children's Hospital, Manchester, United Kingdom
| | - Samir Mehta
- Birmingham Clinical Trials Unit, Birmingham, United Kingdom
| | | | | | - Emma Frew
- University of Birmingham, Birmingham, United Kingdom
| | | | - Adam Khan
- Birmingham Clinical Trials Unit, Birmingham, United Kingdom
| | - David Milford
- Birmingham Children's Hospital, Birmingham, United Kingdom
| | | | - Moin A Saleem
- Bristol Children's Hospital, Bristol, United Kingdom
| | - Angela Hall
- Leicester Children's Hospital, Leicester, United Kingdom
| | - Ania Koziell
- Evelina Children's Hospital, London, United Kingdom
| | | | | | | | - Rodney Gilbert
- Southampton Children's Hospital, Southampton, United Kingdom
| | - Caroline Jones
- Alder Hey Children's Hospital, Liverpool, United Kingdom
| | - Karl McKeever
- Royal Hospital for Sick Children, Belfast, United Kingdom
| | - Wendy Cook
- Nephrotic Syndrome Trust (NeST), Taunton, United Kingdom
| | - Natalie Ives
- Birmingham Clinical Trials Unit, Birmingham, United Kingdom
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13
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Shariff M, Doshi R, Pedreira Vaz I, Adalja D, Krishnan A, Hegde S, Kumar A. Impella versus intra-aortic balloon pump in cardiogenic shock: a meta-analysis assessing 30-days mortality. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1130] [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: 11/13/2022] Open
Abstract
Abstract
Introduction
Cardiogenic shock is linked with eminent morbidity and mortality despite advances in treatment modality. Adjuvant treatment modalities to provide mechanical haemodynamic support in the form of intra-aortic balloon pump (IABP) or Impella are being used among patients with cardiogenic shock. The Impella prunes left ventricular preload, whereas, IABP persuades after load reduction and both contribute to improved cardiac output. A few underpowered randomised control trials (RCTs) and observational studies compared short term mortality benefit of Impella juxtaposed to IABP among patients with cardiogenic shock.
Purpose
A meta-analysis of RCTs and observational studies researching the short-term mortality in cardiogenic shock comparing Impella to IABP was executed.
Methods
The databases PubMed, EMBASE and Cochrane were searched systematically to identify relevant RCTs and observational studies contrasting Impella to IABP and reporting 30-days mortality as outcomes. The search terms used were “Impella”, “IAPB”, “intra-aortic balloon pump” and all word variations were utilised. The search was conducted from the debut of the databases up to January 2020. Two reviewers independently and in tandem performed data screening and extraction from identified articles. Inverse variance method with Paule-Mandel estimator for tau2 and Hartung-Knapp adjustment was used to calculate Risk Ratio with 95% confidence interval. Heterogeneity was assessed using I2 statistics. Furthermore, we calculated the 95% predictive interval for the pooled estimate. All statistical analysis for this meta-analysis was carried out using R statistical software version 3.6.2 using the package meta ( ). Additionally, Grading of Recommendations, Assessment, Development and Evaluations (GRADE) criteria were used to assess the certainty of evidence.
Results
Five studies constituting 728 patients were included in the final analysis. Two were RCTs (ISAR-SHOCK trial and IMPRESS in Severe Shock trial), one study was a propensity score matched observational study and two were unmatched observational studies. There was no difference in the risk of 30-days mortality in patients treated with Impella as compared to IABP [Risk Ratio: 0.97, 95% confidence interval: 0.66–1.41, I2: 32%]. To account for the heterogeneity, we calculated 95% predictive interval: 0.46–2.02. Thus, very low certainty of evidence concluded no difference in the risk of 30-days mortality among cardiogenic shock patients treated with Impella in opposition to IABP.
Conclusion
This meta-analysis comparing Impella juxtaposed with IABP demonstrated no difference in the risk of 30-days mortality among patients with cardiogenic shock.
30-days Mortality
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- M Shariff
- St John's Medical College Hospital, Critical Care Medicine, Bangalore, India
| | - R Doshi
- University of Nevada, Internal Medicine, Reno, United States of America
| | - I Pedreira Vaz
- Jackson Memorial Hospital, Internal Medicine, Miami, United States of America
| | - D Adalja
- Gotri Medical Education and Research Centre, Internal Medicine, Vadodara, India
| | - A Krishnan
- JJM Medical College, Internal Medicine, Davangere, India
| | - S Hegde
- Sri Jayadeva Institute of Cardiovascular Sciences and Research, Cardiology, Mysore, India
| | - A Kumar
- St John's Medical College Hospital, Critical Care Medicine, Bangalore, India
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McClatchey MA, du Toit ZD, Vaughan R, Whatley SD, Martins S, Hegde S, Naude JTW, Thomas DH, Griffiths DF, Genomics England Research Consortium, Clarke AJ, Fry AE. Focal segmental glomerulosclerosis and mild intellectual disability in a patient with a novel de novo truncating TRIM8 mutation. Eur J Med Genet 2020; 63:103972. [PMID: 32531461 DOI: 10.1016/j.ejmg.2020.103972] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 02/27/2020] [Revised: 04/08/2020] [Accepted: 06/01/2020] [Indexed: 01/07/2023]
Abstract
Mutations in the TRIM8 gene have been described in patients with severe developmental delay, intellectual disability and epilepsy. Only six patients have been described to date. All the previous mutations were truncating variants clustered in the C-terminus of the protein. A previous patient with TRIM8-related epileptic encephalopathy was reported to have nephrotic syndrome. Here we describe the clinical, radiological and histological features of an 8-year-old male patient with a TRIM8 mutation who, in contrast to previous patients, had only mild intellectual disability and well-controlled epilepsy. The patient was found to have proteinuria at 2 years of age. Renal biopsy findings were suggestive of focal segmental glomerulosclerosis. His kidney function declined and peritoneal dialysis was started at 5 years of age. He underwent renal transplant at 7 years of age. Trio-based whole genome sequencing identified a novel de novo heterozygous frameshift mutation in TRIM8 (NM_030912.2) c.1198_1220del, p.(Tyr400ArgfsTer2). This patient is further evidence that TRIM8 mutations cause a syndrome with both neurological and renal features. Our findings suggest the spectrum of TRIM8-related disease may be wider than previously thought with the possibility of milder neurodevelopmental problems and/or a more severe, progressive renal phenotype. We highlight the need for proteinuria screening in patients with TRIM8 mutations.
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Affiliation(s)
- Martin A McClatchey
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK
| | - Zachary D du Toit
- Department of General Medicine, Glangwili General Hospital, SA31 2AF, Carmarthen, UK
| | - Rhys Vaughan
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK
| | - Sharon D Whatley
- Institute of Medical Genetics, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK
| | - Sara Martins
- Institute of Medical Genetics, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK
| | - Shivaram Hegde
- Department of Paediatric Nephrology, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK
| | - Johann Te Water Naude
- Paediatric Neurology Service, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK
| | - David H Thomas
- Department of Cellular Pathology, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK
| | - David F Griffiths
- Department of Cellular Pathology, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK
| | | | - Angus J Clarke
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK; Institute of Medical Genetics, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK
| | - Andrew E Fry
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK; Institute of Medical Genetics, University Hospital of Wales, Heath Park, Cardiff, CF14 4XW, UK.
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15
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Misra U, TcR R, Kumaravelu S, Arjundas D, Wadia R, Nair R, Alurkar A, Pujarai S, Udhar M, Palasdeonkar N, Buddha S, Kumar S, Salvadeeswaran M, Deasai S, Pammidimukkala V, Sharma M, Kumar K, Percival G, Hegde S, Machhavada K. Indian registry in ischemic stroke- tenecteplase (IRIS- TNK)- An interim analysis. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.690] [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: 11/30/2022]
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16
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N V, Hegde S, Kamble N, Yadav R, Pal PK. Cognitive profile of Parkinson’s disease with and without deficits in motor speed. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Hegde S, Patodia A, Shah K, Dixit U. The applicability of the Demirjian, Willems and Chaillet standards to age estimation of 5-15 year old Indian children. J Forensic Odontostomatol 2019; 37:40-50. [PMID: 31187742 PMCID: PMC6875241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND Demirjian's method of age estimation has been reported to overestimate age and Willems' method to give consistently more accurate results. Not enough, however, is known about the applicability of Chaillet's standards. AIM The present study aimed to compare the accuracy of Demirjian's, Willems' and Chaillet's standards in age estimation of 5 to 15 year-old Indian children. DESIGN In this cross-sectional observational study, three methods were compared for accuracy in estimating the age of 1200 Indian children aged 5-15 years. RESULTS Demirjian's method overestimated age by +0.24 ± 0.80 years, +0.11 ± 0.81years and +0.19 ± 0.80 years in boys, girls and the total sample, respectively. With Willems' method, overestimations of +0.09 ± 0.80 years, +0.08 ± 0.80 years and +0.09 ± 0.80 years were obtained in boys, girls and the total sample, respectively. Chaillet's method underestimated age by -0.12 ± 0.69 years, -0.45 ± 0.88 years and -0.25 ± 0.83 years in boys, girls and the total sample, respectively. Statistically significant differences were observed between dental and chronological ages with all methods (p < 0.001). Significant sex-based differences were observed only with Demirjian's and Chaillet's methods (p < 0.05). CONCLUSION Willems' method was the most accurate in age estimation, followed by Demirjian's and Chaillet's methods. While Demirjian's method was more accurate than Chaillet's in females, Chaillet's method better predicted the age of males.
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Affiliation(s)
- S Hegde
- Department of Pediatric Dentistry, Pacific Dental College and Hospital, Udaipur, Rajasthan, India
| | - A Patodia
- Department of Pediatric Dentistry, Pacific Dental College and Hospital, Udaipur, Rajasthan, India
| | - K Shah
- Department of Pediatric Dentistry, Pacific Dental College and Hospital, Udaipur, Rajasthan, India
| | - U Dixit
- Department of Pediatric and Preventive Dentistry, D. Y. Patil University- School of Dentistry, Navi Mumbai, Maharashtra, India
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18
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Nayak RC, Hegde S, Althoff MJ, Wellendorf AM, Mohmoud F, Perentesis J, Reina-Campos M, Reynaud D, Zheng Y, Diaz-Meco MT, Moscat J, Cancelas JA. The signaling axis atypical protein kinase C λ/ι-Satb2 mediates leukemic transformation of B-cell progenitors. Nat Commun 2019; 10:46. [PMID: 30610188 PMCID: PMC6320370 DOI: 10.1038/s41467-018-07846-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 11/21/2018] [Indexed: 01/01/2023] Open
Abstract
Epigenetically regulated transcriptional plasticity has been proposed as a mechanism of differentiation arrest and resistance to therapy. BCR-ABL leukemias result from leukemic stem cell/progenitor transformation and represent an opportunity to identify epigenetic progress contributing to lineage leukemogenesis. Primary human and murine BCR-ABL+ leukemic progenitors have increased activation of Cdc42 and the downstream atypical protein kinase C (aPKC). While the isoform aPKCζ behaves as a leukemic suppressor, aPKCλ/ι is critically required for oncogenic progenitor proliferation, survival, and B-cell differentiation arrest, but not for normal B-cell lineage differentiation. In vitro and in vivo B-cell transformation by BCR-ABL requires the downregulation of key genes in the B-cell differentiation program through an aPKC λ/ι-Erk dependent Etv5/Satb2 chromatin repressive signaling complex. Genetic or pharmacological targeting of aPKC impairs human oncogenic addicted leukemias. Therefore, the aPKCλ/ι-SATB2 signaling cascade is required for leukemic BCR-ABL+ B-cell progenitor transformation and is amenable to non-tyrosine kinase inhibition. The upstream pathways regulating leukemic transcriptional plasticity for differentiation arrest and resistance to therapy are unclear. Here the authors show that aPKC λ/ι-controls leukemic B-cell precursor differentiation arrest trough RAC/MEK/ERK/SATB2 epigenetic repression
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Affiliation(s)
- R C Nayak
- Division of Experimental Hematology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA
| | - S Hegde
- Division of Experimental Hematology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Hoxworth Blood Center, University of Cincinnati, 3130 Highland Ave., Cincinnati, OH, 45267, USA
| | - M J Althoff
- Division of Experimental Hematology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Hoxworth Blood Center, University of Cincinnati, 3130 Highland Ave., Cincinnati, OH, 45267, USA.,Graduate Program of Cancer & Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - A M Wellendorf
- Division of Experimental Hematology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA
| | - F Mohmoud
- Graduate Program of Cancer & Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - J Perentesis
- Division of Oncology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA
| | - M Reina-Campos
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - D Reynaud
- Division of Experimental Hematology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA
| | - Y Zheng
- Division of Experimental Hematology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA
| | - M T Diaz-Meco
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - J Moscat
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - J A Cancelas
- Division of Experimental Hematology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA. .,Hoxworth Blood Center, University of Cincinnati, 3130 Highland Ave., Cincinnati, OH, 45267, USA. .,Graduate Program of Cancer & Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA.
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19
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Hegde S, Bawa M, Mahajan JK, Rao KLN. Erb's palsy complicating a case of annular pancreas. J Neonatal Perinatal Med 2018; 11:97-99. [PMID: 29689736 DOI: 10.3233/npm-1816156] [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] [Indexed: 11/15/2022]
Abstract
We report an unusual presentation of annular pancreas with pneumoperitoneum in a newborn with an associated left sided Erb's palsy. The neurological deficit caused considerable confusion in the diagnosis and unexpected complications after surgery. We highlight the importance of clinical examination and the complications that an Erb's palsy can cause. This unusual triad of Erb's palsy, eventration of diaphragm and annular pancreas has hitherto not been described in literature.
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Affiliation(s)
- S Hegde
- Department of Pediatric Surgery, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - M Bawa
- Department of Pediatric Surgery, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - J K Mahajan
- Department of Pediatric Surgery, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - K L N Rao
- Department of Pediatric Surgery, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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20
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Pathak G, Agostino MJ, Bishara K, Capell WR, Fisher JL, Hegde S, Ibrahim BA, Pilarzyk K, Sabin C, Tuczkewycz T, Wilson S, Kelly MP. PDE11A negatively regulates lithium responsivity. Mol Psychiatry 2017; 22:1714-1724. [PMID: 27646265 PMCID: PMC5359083 DOI: 10.1038/mp.2016.155] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 07/13/2016] [Accepted: 07/18/2016] [Indexed: 01/15/2023]
Abstract
Lithium responsivity in patients with bipolar disorder has been genetically associated with Phosphodiesterase 11A (PDE11A), and lithium decreases PDE11A mRNA in induced pluripotent stem cell-derived hippocampal neurons originating from lithium-responsive patients. PDE11 is an enzyme uniquely enriched in the hippocampus that breaks down cyclic AMP and cyclic GMP. Here we determined whether decreasing PDE11A expression is sufficient to increase lithium responsivity in mice. In dorsal hippocampus and ventral hippocampus (VHIPP), lithium-responsive C57BL/6J and 129S6/SvEvTac mice show decreased PDE11A4 protein expression relative to lithium-unresponsive BALB/cJ mice. In VHIPP, C57BL/6J mice also show differences in PDE11A4 compartmentalization relative to BALB/cJ mice. In contrast, neither PDE2A nor PDE10A expression differ among the strains. The compartment-specific differences in PDE11A4 protein expression are explained by a coding single-nucleotide polymorphism (SNP) at amino acid 499, which falls within the GAF-B homodimerization domain. Relative to the BALB/cJ 499T, the C57BL/6J 499A decreases PDE11A4 homodimerization, which removes PDE11A4 from the membrane. Consistent with the observation that lower PDE11A4 expression correlates with better lithium responsiveness, we found that Pde11a knockout mice (KO) given 0.4% lithium chow for 3+ weeks exhibit greater lithium responsivity relative to wild-type (WT) littermates in tail suspension, an antidepressant-predictive assay, and amphetamine hyperlocomotion, an anti-manic predictive assay. Reduced PDE11A4 expression may represent a lithium-sensitive pathophysiology, because both C57BL/6J and Pde11a KO mice show increased expression of the pro-inflammatory cytokine interleukin-6 (IL-6) relative to BALB/cJ and PDE11A WT mice, respectively. Our finding that PDE11A4 negatively regulates lithium responsivity in mice suggests that the PDE11A SNPs identified in patients may be functionally relevant.
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Affiliation(s)
- G Pathak
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | | | - K Bishara
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - W R Capell
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - J L Fisher
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - S Hegde
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - B A Ibrahim
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - K Pilarzyk
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - C Sabin
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | | | - S Wilson
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - M P Kelly
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
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21
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Roy A, Hegde S, Srinivas M. Sequelae of stroke a prospective study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2778] [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: 11/30/2022]
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22
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Kalz L, Kalz-Füller B, Hegde S, Schwanitz G. Polymorphisms of Q-band Heterochromatin: Qualitative and Quantitative Analyses of Features in 3 Ethnic Groups (Europeans, Indians, and Turks). INT J HUM GENET 2017. [DOI: 10.1080/09723757.2005.11885919] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- L. Kalz
- Institute for Human Genetics, Bonn, Germany
| | | | - S. Hegde
- Manipal Hospital, Bangalore, India
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23
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Brocklebank V, Johnson S, Sheerin TP, Marks SD, Gilbert RD, Tyerman K, Kinoshita M, Awan A, Kaur A, Webb N, Hegde S, Finlay E, Fitzpatrick M, Walsh PR, Wong EKS, Booth C, Kerecuk L, Salama AD, Almond M, Inward C, Goodship TH, Sheerin NS, Marchbank KJ, Kavanagh D. Factor H autoantibody is associated with atypical hemolytic uremic syndrome in children in the United Kingdom and Ireland. Kidney Int 2017; 92:1261-1271. [PMID: 28750931 PMCID: PMC5652378 DOI: 10.1016/j.kint.2017.04.028] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 03/31/2017] [Accepted: 04/28/2017] [Indexed: 01/23/2023]
Abstract
Factor H autoantibodies can impair complement regulation, resulting in atypical hemolytic uremic syndrome, predominantly in childhood. There are no trials investigating treatment, and clinical practice is only informed by retrospective cohort analysis. Here we examined 175 children presenting with atypical hemolytic uremic syndrome in the United Kingdom and Ireland for factor H autoantibodies that included 17 children with titers above the international standard. Of the 17, seven had a concomitant rare genetic variant in a gene encoding a complement pathway component or regulator. Two children received supportive treatment; both developed established renal failure. Plasma exchange was associated with a poor rate of renal recovery in seven of 11 treated. Six patients treated with eculizumab recovered renal function. Contrary to global practice, immunosuppressive therapy to prevent relapse in plasma exchange-treated patients was not adopted due to concerns over treatment-associated complications. Without immunosuppression, the relapse rate was high (five of seven). However, reintroduction of treatment resulted in recovery of renal function. All patients treated with eculizumab achieved sustained remission. Five patients received renal transplants without specific factor H autoantibody-targeted treatment with recurrence in one who also had a functionally significant CFI mutation. Thus, our current practice is to initiate eculizumab therapy for treatment of factor H autoantibody-mediated atypical hemolytic uremic syndrome rather than plasma exchange with or without immunosuppression. Based on this retrospective analysis we see no suggestion of inferior treatment, albeit the strength of our conclusions is limited by the small sample size.
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Affiliation(s)
- Vicky Brocklebank
- National Renal Complement Therapeutics Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Sally Johnson
- Great North Children's Hospital, Sir James Spence Institute, Royal Victoria Infirmary, Newcastle, UK
| | - Thomas P Sheerin
- National Renal Complement Therapeutics Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Stephen D Marks
- Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Rodney D Gilbert
- University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Kay Tyerman
- Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Meredith Kinoshita
- The Department for Paediatric Nephrology & Transplantation, The Children's University Hospital, Dublin, Ireland
| | - Atif Awan
- The Department for Paediatric Nephrology & Transplantation, The Children's University Hospital, Dublin, Ireland
| | - Amrit Kaur
- Department of Paediatric Nephrology, Royal Manchester Children's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Nicholas Webb
- Department of Paediatric Nephrology, Royal Manchester Children's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | | | - Eric Finlay
- Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | | | - Patrick R Walsh
- National Renal Complement Therapeutics Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Edwin K S Wong
- National Renal Complement Therapeutics Centre, Newcastle University, Newcastle upon Tyne, UK
| | | | - Larissa Kerecuk
- Birmingham Children's Hospital NHS Foundation Trust, Birmingham, UK
| | - Alan D Salama
- UCL Centre for Nephrology, Royal Free London NHS Foundation Trust, Rowland Hill Street, London, UK
| | - Mike Almond
- Southend University Hospital, Prittlewell Chase, Westcliff-on-Sea, UK
| | - Carol Inward
- Department of Paediatric Nephrology, Bristol Royal Hospital for Children, Bristol, UK
| | - Timothy H Goodship
- National Renal Complement Therapeutics Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Neil S Sheerin
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Kevin J Marchbank
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - David Kavanagh
- National Renal Complement Therapeutics Centre, Newcastle University, Newcastle upon Tyne, UK.
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24
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Openshaw JJ, Hegde S, Sazzad HMS, Khan SU, Hossain MJ, Epstein JH, Daszak P, Gurley ES, Luby SP. Bat Hunting and Bat-Human Interactions in Bangladeshi Villages: Implications for Zoonotic Disease Transmission and Bat Conservation. Transbound Emerg Dis 2016; 64:1287-1293. [PMID: 27125493 PMCID: PMC5086320 DOI: 10.1111/tbed.12505] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Indexed: 01/03/2023]
Abstract
Bats are an important reservoir for emerging zoonotic pathogens. Close human–bat interactions, including the sharing of living spaces and hunting and butchering of bats for food and medicines, may lead to spillover of zoonotic disease into human populations. We used bat exposure and environmental data gathered from 207 Bangladeshi villages to characterize bat exposures and hunting in Bangladesh. Eleven percent of households reported having a bat roost near their homes, 65% reported seeing bats flying over their households at dusk, and 31% reported seeing bats inside their compounds or courtyard areas. Twenty percent of households reported that members had at least daily exposure to bats. Bat hunting occurred in 49% of the villages surveyed and was more likely to occur in households that reported nearby bat roosts (adjusted prevalence ratio [aPR] 2.3, 95% CI 1.1–4.9) and villages located in north‐west (aPR 7.5, 95% CI 2.5–23.0) and south‐west (aPR 6.8, 95% CI 2.1–21.6) regions. Our results suggest high exposure to bats and widespread hunting throughout Bangladesh. This has implications for both zoonotic disease spillover and bat conservation.
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Affiliation(s)
- J J Openshaw
- Infectious Diseases and Geographic Medicine, Stanford University, Stanford, CA, USA
| | - S Hegde
- International Centre for Diarrheal Diseases, Bangladesh, Dhaka, Bangladesh
| | - H M S Sazzad
- International Centre for Diarrheal Diseases, Bangladesh, Dhaka, Bangladesh
| | - S U Khan
- International Centre for Diarrheal Diseases, Bangladesh, Dhaka, Bangladesh
| | - M J Hossain
- International Centre for Diarrheal Diseases, Bangladesh, Dhaka, Bangladesh
| | | | - P Daszak
- EcoHealth Alliance, New York, NY, USA
| | - E S Gurley
- International Centre for Diarrheal Diseases, Bangladesh, Dhaka, Bangladesh
| | - S P Luby
- Infectious Diseases and Geographic Medicine, Stanford University, Stanford, CA, USA.,International Centre for Diarrheal Diseases, Bangladesh, Dhaka, Bangladesh
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Hegde S, Jain M, Shubha AB. A Rare Bilateral Presentation of Multiple Dens Invaginatus, Shovel-Shaped Incisor and Talon Cusp With Mesiodens. ACTA ACUST UNITED AC 2015; 12:292-5. [DOI: 10.3126/kumj.v12i4.13737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aim of this paper is to describe a unique and unusual case of concomitant appearance of morphological dental anomalies in the maxillary anterior region, along with its management in a patient with no systemic abnormality. This case report describes the clinical and radiographic features of talon cusp, dens invaginatus, shovel-shaped incisors and a supernumerary tooth occurring in a single patient, which is a rare presentation. All 4 permanent maxillary incisors had dens invaginatus, the permanent maxillary canines showed the presence of talon cusps, the permanent maxillary central incisors were shovel-shaped and an erupted mesiodens was also observed. Treatment included restorative, surgical and orthodontic approaches.Kathmandu University Medical Journal Vol.12(4) 2014; 292-295
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27
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Manoor Maiya V, Vaid N, Basu S, Vatyam S, Hegde S, Deshmukh S, Zade B. The Use of Xylitol for the Prevention of Xerostomia in Patients Receiving Intensity Modulated Radiation Therapy for Head and Neck Cancers. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Sullivan JA, Jankowska-Gan E, Shi L, Roenneburg D, Hegde S, Greenspan DS, Wilkes DS, Denlinger LC, Burlingham WJ. Differential requirement for P2X7R function in IL-17 dependent vs. IL-17 independent cellular immune responses. Am J Transplant 2014; 14:1512-22. [PMID: 24866539 PMCID: PMC4295495 DOI: 10.1111/ajt.12741] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 02/24/2014] [Accepted: 03/10/2014] [Indexed: 01/25/2023]
Abstract
IL17-dependent autoimmunity to collagen type V (Col V) has been associated with lung transplant obliterative bronchiolitis. Unlike the T helper 1 (Th1)-dependent immune responses to Tetanus Toxoid (TT), the Th17 response to Col V in lung transplant patients and its Th1/17 variant observed in coronary artery disease patients requires IL-1β, tumor necrosis factor α and CD14(+) cells. Given the involvement of the P2X7 receptor (P2X7R) in monocyte IL-1β responses, we investigated its role in Th17-, Th1/17- and Th1-mediated proinflammatory responses. Transfer of antigen-pulsed peripheral blood mononucleated cells (PBMCs) from Col V-reactive patients into SCID mouse footpads along with P2X7R antagonists revealed a selective inhibition of Col V-, but not TT-specific swelling responses. P2X7R inhibitors blocked IL-1β induction from monocytes, including both Col V-α1 peptide-induced (T-dependent), as well as native Col V-induced (T-independent) responses. Significantly higher P2X7R expression was found on CXCR3(neg) CCR4(+)/6(+) CD4(+) [Th17] versus CXCR3(+)CCR4/6(neg) CD4(+) [Th1] subsets in PBMCs, suggesting that the paradigm of selective dependence on P2X7R might extend beyond Col V autoimmunity. Indeed, P2X7R inhibitors suppressed not only anti-Col V, but also Th1/17-mediated alloimmunity, in a heart transplant patient without affecting anti-viral Epstein-Barr virus responses. These results suggest that agents targeting the P2X7R might effectively treat Th17-related transplant pathologies, while maintaining Th1-immunity to infection.
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Affiliation(s)
- JA Sullivan
- Department of Surgery, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792
| | - E Jankowska-Gan
- Department of Surgery, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792
| | - L Shi
- Department of Medicine, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792
| | - D Roenneburg
- Department of Surgery, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792
| | | | - DS Greenspan
- Department of Cell & Regenerative Biology, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792
| | - DS Wilkes
- Department of Medicine, University of Indiana, 340 W 10th St Suite 6200 Indianapolis, IN 46202
| | - LC Denlinger
- Department of Medicine, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792
| | - WJ Burlingham
- Department of Surgery, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792,To whom correspondence should be addressed: 600 Highland Avenue, Room G4/702, Madison, WI 53792. Tel: (608) 263-0119 Fax: (608) 262-6280
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McCarthy HJ, Bierzynska A, Wherlock M, Ognjanovic M, Kerecuk L, Hegde S, Feather S, Gilbert RD, Krischock L, Jones C, Sinha MD, Webb NJA, Christian M, Williams MM, Marks S, Koziell A, Welsh GI, Saleem MA. Simultaneous sequencing of 24 genes associated with steroid-resistant nephrotic syndrome. Clin J Am Soc Nephrol 2013; 8:637-48. [PMID: 23349334 DOI: 10.2215/cjn.07200712] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND OBJECTIVES Up to 95% of children presenting with steroid-resistant nephrotic syndrome in early life will have a pathogenic single-gene mutation in 1 of 24 genes currently associated with this disease. Others may be affected by polymorphic variants. There is currently no accepted diagnostic algorithm for clinical genetic testing. The hypothesis was that the increasing reliability of next generation sequencing allows comprehensive one-step genetic investigation of this group and similar patient groups. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS This study used next generation sequencing to screen 446 genes, including the 24 genes known to be associated with hereditary steroid-resistant nephrotic syndrome. The first 36 pediatric patients collected through a national United Kingdom Renal Registry were chosen with comprehensive phenotypic detail. Significant variants detected by next generation sequencing were confirmed by conventional Sanger sequencing. RESULTS Analysis revealed known and novel disease-associated variations in expected genes such as NPHS1, NPHS2, and PLCe1 in 19% of patients. Phenotypically unexpected mutations were also detected in COQ2 and COL4A4 in two patients with isolated nephropathy and associated sensorineural deafness, respectively. The presence of an additional heterozygous polymorphism in WT1 in a patient with NPHS1 mutation was associated with earlier-onset disease, supporting modification of phenotype through genetic epistasis. CONCLUSIONS This study shows that next generation sequencing analysis of pediatric steroid-resistant nephrotic syndrome patients is accurate and revealing. This analysis should be considered part of the routine genetic workup of diseases such as childhood steroid-resistant nephrotic syndrome, where the chance of genetic mutation is high but requires sequencing of multiple genes.
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Affiliation(s)
- Hugh J McCarthy
- Academic and Children’s Renal Unit, University of Bristol, UK
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30
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Bennett C, Gangadhar B, Hegde S, Kashyap H, Keshav Kumar J, Mukundan C, Nehra A, Raguram A, Rajakumari K, Rajeswaran J, Rao S, Sadana D, Sadasivan A, Shereena E, Sudhir P, Thomas S. List of contributors. Neuropsychol Rehabil 2013. [DOI: 10.1016/b978-0-12-416046-0.00013-4] [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: 11/17/2022]
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31
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Sen P, Bhuwanesh K, Ashutosh K, Engineer Z, Hegde S, Sen P, Lal R. Micro-Scale Multi-Effect Distillation System for Low Steam Inputs. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.proeng.2013.03.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Unnikrishnan B, Jagannath V, Ramapuram JT, Hegde S. Study of depression and its associated factors among women living with HIV AIDS in coastal South India. Retrovirology 2012. [PMCID: PMC3360354 DOI: 10.1186/1742-4690-9-s1-p137] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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34
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Hegde S, Bajaj A, Entwisle J. Incidence of thrombosis in lung cancer. Lung Cancer 2008. [DOI: 10.1016/s0169-5002(08)70014-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: 11/30/2022]
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Abstract
Congenital alveolar dysplasia (CAD) is a rare disorder thought to represent alveolar growth arrest at the canalicular stage of development. An infant with CAD diagnosed on lung biopsy is reported, her respiratory problems resolved spontaneously and she was doing well at follow-up. The infant additionally suffered from systemic hypertension and hypertrophic pyloric stenosis. In conclusion, we speculate that the association of CAD with systemic hypertension and hypertrophic pyloric stenosis might be explained by abnormalities of isoforms of nitric oxide synthase (NOS) resulting in congenital deformities involving smooth muscles.
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Affiliation(s)
- S Hegde
- Division of Asthma, Allergy and Lung Biology, King's College London School of Medicine at Guy's, King's College and St. Thomas' Hospitals, London, UK
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36
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Abstract
Early unilateral nephrectomy was carried out in four young children with unilateral renovascular disease, a poorly functioning kidney and hypertension. At follow-up 5-16 years later all showed normal growth, blood pressure and renal function, and only one child had low-grade albuminuria. Unilateral nephrectomy seems to be a safe and effective alternative to long-term hypotensive treatment.
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Affiliation(s)
- Shivaram Hegde
- Department of Paediatric Nephrology, Royal Victoria Infirmary, Newcastle-upon-Tyne NE1 4LP, UK
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Abstract
We report three infants with severe, early hypertension due to unilateral renovascular disease, whose cardiovascular changes, or polycythaemia, or both, indicated they had been affected as fetuses. All underwent unilateral nephrectomy, and had a similar histology, with patchy areas having relatively normal glomeruli but immature proximal tubules. This pattern may be a marker for renovascular disease in fetal life.
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Affiliation(s)
- Shivaram Hegde
- Department of Paediatric Nephrology, Royal Victoria Infirmary, Newcastle, UK
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38
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Miquel ME, Rhode KS, Acher PL, Macdougall ND, Blackall J, Gaston RP, Hegde S, Morris SL, Beaney R, Deehan C, Popert R, Keevil SF. Using combined x-ray and MR imaging for prostate I-125 post-implant dosimetry: phantom validation and preliminary patient work. Phys Med Biol 2006; 51:1129-37. [PMID: 16481682 DOI: 10.1088/0031-9155/51/5/005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Post-implantation dosimetry is an important element of permanent prostate brachytherapy. This process relies on accurate localization of implanted seeds relative to the surrounding organs. Localization is commonly achieved using CT images, which provide suboptimal prostate delineation. On MR images, conversely, prostate visualization is excellent but seed localization is imprecise due to distortion and susceptibility artefacts. This paper presents a method based on fused MR and x-ray images acquired consecutively in a combined x-ray and MRI interventional suite. The method does not rely on any explicit registration step but on a combination of system calibration and tracking. A purpose-built phantom was imaged using MRI and x-rays, and the images were successfully registered. The same protocol was applied to three patients where combining soft tissue information from MRI with stereoscopic seed identification from x-ray imaging facilitated post-implant dosimetry. This technique has the potential to improve on dosimetry using either CT or MR alone.
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Affiliation(s)
- M E Miquel
- Division of Imaging Sciences, King's College London, London, SE1 9RT, UK
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39
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Abstract
A 10-yr-old boy who presented with vomiting and abdominal pain 12 days after an uneventful renal transplant had no identifiable transplant-related cause for these symptoms. Four days later a perforated appendix was diagnosed. His case illustrates that common abdominal pathologies may present differently in immunosuppressed, transplanted patients, causing diagnostic delay.
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Affiliation(s)
- Shivaram Hegde
- Department of Paediatric Nephrology, Royal Victoria Infirmary, Newcastle, UK
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40
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Sermesant M, Rhode K, Sanchez-Ortiz GI, Camara O, Andriantsimiavona R, Hegde S, Rueckert D, Lambiase P, Bucknall C, Rosenthal E, Delingette H, Hill DLG, Ayache N, Razavi R. Simulation of cardiac pathologies using an electromechanical biventricular model and XMR interventional imaging. Med Image Anal 2005; 9:467-80. [PMID: 16006170 DOI: 10.1016/j.media.2005.05.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Simulating cardiac electromechanical activity is of great interest for a better understanding of pathologies and for therapy planning. Design and validation of such models is difficult due to the lack of clinical data. XMR systems are a new type of interventional facility in which patients can be rapidly transferred between X-ray and MR systems. Our goal is to design and validate an electromechanical model of the myocardium using XMR imaging. The proposed model is computationally fast and uses clinically observable parameters. We present the integration of anatomy, electrophysiology, and motion from patient data. Pathologies are introduced in the model and simulations are compared to measured data. Initial qualitative comparison on the two clinical cases presented is encouraging. Once fully validated, these models will make it possible to simulate different interventional strategies.
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Affiliation(s)
- M Sermesant
- Cardiac MR Research Group, King's College London, 5th Floor Thomas Guy House, Guy's Hospital, London, UK.
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41
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Lambiase PD, Hegde S, Sermesant M, Rhode KS, Hill DL, Razavi R, Gill JS. Integrated X-ray & Magnetic Resonance imaging (XMR) -a novel strategy for guiding pulmonary vein ablation. Heart Rhythm 2005. [DOI: 10.1016/j.hrthm.2005.02.859] [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: 10/25/2022]
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42
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Williams MR, Hegde S, Norton MR. Informed consent and surgeons in training: do patients consent to allow surgical trainees to operate on them? Ann R Coll Surg Engl 2005; 86:465-6. [PMID: 15527593 PMCID: PMC1964262 DOI: 10.1308/1478708041127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- M R Williams
- Department of Trauma and Orthopaedics, Royal Cornwall Hospitals NHS Trust, Treliske, Truro, Cornwall, UK
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Affiliation(s)
- N E Moghal
- Department of Paediatric Nephrology, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP, UK.
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44
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Hegde S, Coulthard MG. End stage renal disease due to bilateral renal malakoplakia. Arch Dis Child 2004; 89:78-9. [PMID: 14709516 PMCID: PMC1755936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Malakoplakia typically affects the bladders of immunocompromised adults who have defective intracellular killing of Escherichia coli. Renal malakoplakia is rare in children and generally has a good outcome. In the case presented, however, it caused end stage renal failure in a 5 year old girl. The management dilemmas surrounding renal transplantation are highlighted.
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Affiliation(s)
- S Hegde
- Department of Paediatric Nephrology, Royal Victoria Infirmary, Newcastle, UK
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45
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Vetting M, Roderick SL, Hegde S, Magnet S, Blanchard JS. What can structure tell us about in vivo function? The case of aminoglycoside-resistance genes. Biochem Soc Trans 2003; 31:520-2. [PMID: 12773148 DOI: 10.1042/bst0310520] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Resistance to antibiotics used in the treatment of bacterial infections is an expanding clinical problem. Aminoglycosides, one of the oldest classes of natural product antibiotics, exert their bactericidal effect as the result of inhibiting bacterial protein synthesis by binding to the acceptor site of the 30 S ribosomal subunit. The most common mechanism of clinical resistance to aminoglycosides results from the expression of enzymes that covalently modify the aminoglycoside. We will discuss the enzymology and structure of two representative chromosomally encoded aminoglycoside N-acetyltransferases, Mycobacterium tuberculosis AAC(2')-Ic and Salmonella enterica AAC(6')-Iy, and speculate about their possible physiological function and substrates.
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Affiliation(s)
- M Vetting
- Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA
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46
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Sen PK, Hegde S, Carpenter PW. Propagation of Small Disturbance Waves in a Fluid Flow across the Junctions between Rigid and Compliant Panels. DEFENCE SCI J 2003. [DOI: 10.14429/dsj.53.2265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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47
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Gribelyuk MA, McCartney MR, Li J, Murthy CS, Ronsheim P, Doris B, McMurray JS, Hegde S, Smith DJ. Mapping of electrostatic potential in deep submicron CMOS devices by electron holography. Phys Rev Lett 2002; 89:025502. [PMID: 12097001 DOI: 10.1103/physrevlett.89.025502] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2001] [Indexed: 05/23/2023]
Abstract
Quantitative two-dimensional maps of electrostatic potential in device structures are obtained using off-axis electron holography with a spatial resolution of 6 nm and a sensitivity of 0.17 V. Estimates of junction depth and variation in electrostatic potential obtained by electron holography, process simulation, and secondary ion mass spectroscopy show close agreement. Measurement artifacts due to sample charging and surface "dead layers" do not need to be considered provided that proper care is taken with sample preparation. The results demonstrate that electron holography could become an effective method for quantitative 2D analysis of dopant diffusion in deep-submicron devices.
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Affiliation(s)
- M A Gribelyuk
- IBM Microelectronics Division, Semiconductor Research and Development Center, Hopewell Junction, New York 12533, USA
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Jamurtas AZ, Goldfarb AH, Chung SC, Hegde S, Marino C, Fatouros IG. Beta-endorphin infusion during exercise in rats does not alter hepatic or muscle glycogen. J Sports Sci 2001; 19:931-5. [PMID: 11820687 DOI: 10.1080/026404101317108435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The aim of this study was to determine whether beta-endorphin infusion influences liver or muscle glycogen concentration during exercise. Thirty-two rats (Harlan Co., IN, USA) with a body mass of 265-290 g were assigned at random to four groups, each of eight rats: (1) beta-endorphin infusion for 90 min at rest; (2) beta-endorphin infusion for 90 min while running on a rodent treadmill at 22 m x min(-1) and 0% grade; (3) saline infusion (0.9% NaCl) for 90 min at rest; and (4) saline infusion for 90 min while running on a rodent treadmill at 22 m x min(-1) and 0% grade. Beta-endorphin infusion elevated plasma beta-endorphin concentration by 2.5-fold at rest compared with saline infusion at rest, and by two-fold after exercise compared with saline infusion after exercise. Beta-endorphin infusion attenuated exercise-induced glucose concentration but did not alter the fasting hepatic glycogen concentration at rest or after exercise compared with saline infusion. Fasting hepatic glycogen decreased significantly as a result of 90 min of exercise independent of treatment. Deep intermedius muscle glycogen concentration at rest was similar after 90 min of both beta-endorphin and saline infusion and decreased significantly as a result of 90 min of exercise independent of treatment. Our results suggest that liver and muscle glycogenolysis is not responsible for the differences in plasma glucose with beta-endorphin infusion during exercise.
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Affiliation(s)
- A Z Jamurtas
- Department of Physical Education and Sport Sciences, University of Thessaly, Trikala, Greece.
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49
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Abstract
PURPOSE To determine the changes in clotting and fibrinolytic activity during the 1-h period after an acute submaximal exercise at a specific relative exercise intensity to ascertain whether during this time there is a greater risk for developing a clot formation or thrombus. METHODS Ten healthy men reported between 0700 and 1000 h and ran at 70-75% VO2max or walked at 1.2 mph for 30 min in a random counter-balanced order. Venous blood was obtained at rest, immediately after, and every 20 min during the 1-h recovery. RESULTS There were no differences in the resting parameters for each treatment. Walking did not alter the activity of any of the measures analyzed compared with rest. Clotting indicators activated partial thromboplastin time (APTT) was significantly decreased by approximately 2 s and remained at this level during the 1-h recovery, and factor VIII activity was elevated 66% immediately after the run and remained elevated at this level during the 1-h recovery period. Fibrinolytic indicators, t-PA, and D-dimers were significantly increased immediately after the run. However, t-PA demonstrated a quadratic negative slope during the 1-h recovery time. D-dimers remained elevated during the 1-h recovery time. CONCLUSIONS These results suggest that running at 70-75% VO2max resulted in elevated clotting and fibrinolytic activity. However, the clotting activity was sustained during a time when fibrinolytic activity declined, which suggests a more favorable situation for clot formation during this time after exercise.
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Affiliation(s)
- S S Hegde
- Exercise and Sport Science Department, University of North Carolina-Greensboro, Greensboro, NC 27402-6169, USA
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50
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Hegde S, Munshi AK. Management of an impacted, dilacerated mandibular left permanent first molar: a case report. Quintessence Int 2001; 32:235-7. [PMID: 12066664] [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: 02/25/2023]
Abstract
A case of an unerupted mandibular left permanent first molar, a partially erupted permanent second molar, and a congenitally absent third molar in a 12-year-old girl is described. The permanent first molar, being dilacerated and impacted, required surgical exposure of the crowns of the first and second molars and distalization of the second molar, with the help of a space regainer, to bring the molars into occlusion.
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Affiliation(s)
- S Hegde
- Department of Preventive and Community Dentistry, ABSM Institute of Dental Sciences, Mangalore, Karnataka, India.
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