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Medlar C, Hughes AJ, Hayden M, Lavelle E, Dunne G, Batt K, Gyves M, Hailey Reyes J, O'Daly BJ, Quinlan JF. The Outreach Virtual Fracture Clinic - a Pilot Report of the Initial Nine Months. Ir Med J 2023; 116:10. [PMID: 36916759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
The virtual fracture clinic (VFC) enables the safe, cost-effective delivery of high-quality patient-centred fracture care, whilst reducing hospital footfall. Within our institution, an Outreach VFC was launched, accepting a pre-defined range of trauma referrals from the outreach centre's emergency department (ED). The initial nine months' worth of cases referred to the Outreach VFC were assessed. The injury pattern, time to review, treatment plan and discharge destination of each referred patient were examined. A total of 822 patients were referred to the Outreach VFC during its initial nine months in operation. Owing to COVID-19-related alterations in the patient pathway, 58.1% of patients were referred on to fracture clinic/ED, with 34.4% of patients being referred for physiotherapy input. 44.9% of patients were reviewed at the Outreach VFC within 72 hours of ED presentation, with 88.6% of patients reviewed within 7 days. The Outreach VFC pilot initiative saved the Dublin Midlands Hospitals Group approximately €83,022 over nine months. The Outreach VFC model represents a novel approach to trauma care delivery with advantages for patient and hospital alike. Rural communities serve to benefit from its future implementation and the remote management of orthopaedic trauma. The Outreach VFC model provides a means of delivering safe and timely orthopaedic care whilst maintaining high levels of patient satisfaction.
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Al Azawi L, Hughes AJ, Queally JM. National Hip Fracture Incidence - Past, Present and Future Projections. Ir Med J 2022; 115:519. [PMID: 35279053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Aims Hip fractures are a significant source of morbidity and mortality, with occurrences set to increase as our population continues to age. The aim of this study is to determine the current and future incidence of hip fractures in Ireland based on predicted population growth. Methods A search was performed of the Irish Hip Fracture Database to identify all hip fracture patients, aged over 60, from 2017-2019. Data on the current population, as well as projections up to 2046, were obtained from the Central Statistics Office, so as to determine projected hip fracture incidence in the coming decades. Results The incidence of hip fractures, in the Irish population aged over 60, was an average of 389.3 per 100,000 from 2017-2019. Annual hip fracture numbers are expected to increase by at least 158.8% by 2046, assuming a stable incidence rate. Conclusion The age and gender specific incidence of hip fractures in Ireland in those over 60 has remained stable compared to previous years. However, this study projects there will be a significant increase in hip fractures in Ireland in the coming decades and there will need to be appropriate resource allocation within future healthcare budgets.
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Affiliation(s)
- L Al Azawi
- School of Medicine, Trinity College Dublin, Dublin 2, Ireland
| | - A J Hughes
- Dept. of Trauma and Orthopaedic Surgery, St. James' Hospital, Dublin 8, Ireland
| | - J M Queally
- Dept. of Trauma and Orthopaedic Surgery, St. James' Hospital, Dublin 8, Ireland
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Abstract
Tape strips have been used widely in dermatology research as a minimally invasive method to sample the epidermis, avoiding the need for skin biopsies. Most research has focused on epidermal pathology, such as atopic eczema, but there is increasing research into the use of tape strips in other dermatoses, such as skin cancer, and the microbiome. This review summarizes the technique of tape stripping, and discusses which dermatoses have been studied by tape stripping and alternative minimally invasive sampling methods. We review the number of tape strips needed from each patient and the components of the epidermis that can be obtained by tape stripping. With a focus on protein and RNA extraction, we address the techniques used to process tape strips. There is no optimal protocol to extract protein, as this depends on the abundance of the protein studied, its level of expression in the epidermis and its solubility. Many variables can alter the amount of protein obtained from tape strips, which must be standardized to ensure consistency between samples. No study has compared different RNA extraction techniques, but our own experience is that RNA yield is optimized by using 20 tape strips and the use of a cell scraper.
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Affiliation(s)
- A J Hughes
- Centre for Cell Biology and Cutaneous Research, The Blizard Institute, Queen Mary University of London, London, UK
| | - S S Tawfik
- Centre for Cell Biology and Cutaneous Research, The Blizard Institute, Queen Mary University of London, London, UK.,Department of Dermatology, Venereology and Andrology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - K P Baruah
- Centre for Cell Biology and Cutaneous Research, The Blizard Institute, Queen Mary University of London, London, UK
| | - E A O'Toole
- Centre for Cell Biology and Cutaneous Research, The Blizard Institute, Queen Mary University of London, London, UK
| | - R F L O'Shaughnessy
- Centre for Cell Biology and Cutaneous Research, The Blizard Institute, Queen Mary University of London, London, UK
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Hughes AJ, Feeley IH, Ahern DP, Dodds MK, Cassidy N, Timlin M, Morris S, Synnott K, Butler JS. New Technologies in the Field of Orthopaedic and Spine Surgery - Navigating the Learning Curve. Ir Med J 2020; 113:148. [PMID: 34520659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- A J Hughes
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - I H Feeley
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - D P Ahern
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - M K Dodds
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - N Cassidy
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - M Timlin
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - S Morris
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - K Synnott
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - J S Butler
- National Spinal Injuries Unit, Department of Trauma and Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
- UCD School of Medicine & Medical Science, Mater Misericordiae University Hospital, Dublin, Ireland
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Bhadresha S, Hughes AJ, McMahon L, Reeken S, Natkunarajah N. Fixed drug eruption secondary to adalimumab. Clin Exp Dermatol 2020; 46:366-368. [PMID: 33448464 DOI: 10.1111/ced.14400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/23/2020] [Indexed: 11/28/2022]
Affiliation(s)
- S Bhadresha
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
| | - A J Hughes
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
| | - L McMahon
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
| | - S Reeken
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
| | - N Natkunarajah
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
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Henry L, Berntsson O, Panman MR, Cellini A, Hughes AJ, Kosheleva I, Henning R, Westenhoff S. New Light on the Mechanism of Phototransduction in Phototropin. Biochemistry 2020; 59:3206-3215. [PMID: 32786255 DOI: 10.1021/acs.biochem.0c00324] [Citation(s) in RCA: 6] [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: 01/28/2023]
Abstract
Phototropins are photoreceptor proteins that regulate blue light-dependent biological processes for efficient photosynthesis in plants and algae. The proteins consist of a photosensory domain that responds to the ambient light and an output module that triggers cellular responses. The photosensory domain of phototropin from Chlamydomonas reinhardtii contains two conserved LOV (light-oxygen-voltage) domains with flavin chromophores. Blue light triggers the formation of a covalent cysteine-flavin adduct and upregulates the phototropin kinase activity. Little is known about the structural mechanism that leads to kinase activation and how the two LOV domains contribute to this. Here, we investigate the role of the LOV1 domain from C. reinhardtii phototropin by characterizing the structural changes occurring after blue light illumination with nano- to millisecond time-resolved X-ray solution scattering. By structurally fitting the data with atomic models generated by molecular dynamics simulations, we find that adduct formation induces a rearrangement of the hydrogen bond network from the buried chromophore to the protein surface. In particular, the change in conformation and the associated hydrogen bonding of the conserved glutamine 120 induce a global movement of the β-sheet, ultimately driving a change in the electrostatic potential on the protein surface. On the basis of the change in the electrostatics, we propose a structural model of how LOV1 and LOV2 domains interact and regulate the full-length phototropin from C. reinhardtii. This provides a rationale for how LOV photosensor proteins function and contributes to the optimal design of optogenetic tools based on LOV domains.
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Affiliation(s)
- L Henry
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden
| | - O Berntsson
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden.,MAX IV Laboratory, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - M R Panman
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden
| | - A Cellini
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden
| | - A J Hughes
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden
| | - I Kosheleva
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, United States
| | - R Henning
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, United States
| | - S Westenhoff
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden
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Ó Doinn T, Hughes AJ, Ahern DP, McDonnell J, Kavanagh E, Morris S, Butler JS. Auto-Decompression - Preserved Neurological Function in Bilateral Cervical Facet Dislocations. Ir Med J 2020; 113:131. [PMID: 33205644] [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: 06/11/2023]
Abstract
Introduction Bilateral cervical facet dislocation (BCFD) is an uncommon injury with a high incidence of severe neurological impairment. We describe 4 cases of BCFD with preserved neurological function. Cases Case 1: A 78-year-old female who suffered two ground level falls (GLFs). Pre-operative American Spinal Injury Association (ASIA) Score was C5D. Imaging revealed a BCFD at C6/C7 and a C6 laminar fracture. Case 2: A 63-year-old male suffered a fall down 14 steps. Pre-operative ASIA score was E. Imaging demonstrated a BCFD at C7/T1, and a C6 laminar fracture. Case 3: A 46-year-old male collided with a tree while descending a hill on a bicycle. Pre-operative ASIA score was C6D. Imaging revealed a BCFD at C7/T1 and a C7 laminar fracture. Case 4: A 67-year-old male suffered a GLF while exiting a stationary car. Pre-operative ASIA score on admission was E. Imaging revealed a BCFD at C6/C7 with bilateral laminar fractures at C5 and C6. Outcome All cases underwent 2-stage surgical fixation. All cases maintained or had an improved ASIA score post-operatively. Conclusion In all cases, the presence of concurrent laminar fractures resulted in an auto-decompression of the spinal canal, preserving neurological function.
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Affiliation(s)
- T Ó Doinn
- National Spinal Injuries Unit, Department of Trauma & Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - A J Hughes
- National Spinal Injuries Unit, Department of Trauma & Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - D P Ahern
- National Spinal Injuries Unit, Department of Trauma & Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
- School of Medicine, Trinity College Dublin, Dublin, Ireland
| | - J McDonnell
- Royal College of Surgeons in Ireland, St. Stephen's Green, Dublin, Ireland
| | - E Kavanagh
- Radiology Department, Mater Misericordiae University Hospital, Dublin, Ireland
| | - S Morris
- National Spinal Injuries Unit, Department of Trauma & Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - J S Butler
- National Spinal Injuries Unit, Department of Trauma & Orthopaedic Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin, Ireland
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Affiliation(s)
- J Frewen
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, Kingston upon Thames, Surrey, UK
| | - A J Hughes
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, Kingston upon Thames, Surrey, UK
| | - J Denny
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, Kingston upon Thames, Surrey, UK
| | - J Natkunarajah
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, Kingston upon Thames, Surrey, UK
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Shuber E, Hughes AJ, Natkunarajah J. Giant scabetic plaques. Clin Exp Dermatol 2019; 45:587-589. [PMID: 31749248 DOI: 10.1111/ced.14147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2019] [Indexed: 11/29/2022]
Affiliation(s)
- E Shuber
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
| | - A J Hughes
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
| | - J Natkunarajah
- Department of Dermatology, Kingston Hospital NHS Foundation Trust, London, UK
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Harrison GI, Murray K, Gore R, Lee P, Sreedharan A, Richardson P, Hughes AJ, Wiselka M, Gelson W, Unitt E, Ratcliff K, Orton A, Trinder K, Simpson C, Ryder SD, Oelbaum S, Foster GR, Christian A, Smith S, Thomson BJ, Reynolds R, Harris M, Hickman M, Irving WL. The Hepatitis C Awareness Through to Treatment (HepCATT) study: improving the cascade of care for hepatitis C virus-infected people who inject drugs in England. Addiction 2019; 114:1113-1122. [PMID: 30694582 DOI: 10.1111/add.14569] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 09/17/2018] [Accepted: 01/24/2019] [Indexed: 01/23/2023]
Abstract
BACKGROUND AND AIMS Previous studies have shown low rates of diagnosis and treatment of hepatitis C virus (HCV) infection in people who inject drugs (PWID). Our aims were to test the effect of a complex intervention [Hepatitis C Awareness Through to Treatment (HepCATT)] in drug and alcohol clinics-primarily, on engagement of HCV-positive PWID with therapy and, secondarily, on testing for HCV, referral to hepatology services and start of HCV treatment. DESIGN AND SETTING A non-randomized pilot study in three specialist addiction clinics in England comparing an intervention year (starting between September 2015 and February 2016) with a baseline year (2014), together with three control clinics. PARTICIPANTS Analysis included all attendees at the intervention and control specialist addiction clinics identified as PWID. INTERVENTION The intervention comprised the placement of a half-time facilitator in each clinic for 12 months with the brief to increase diagnosis of HCV infection within clients at those services and the engagement of diagnosed individuals with an appropriate care pathway. The facilitator undertook various activities, which could include training of key workers, direct interaction with clients, streamlining and support for hepatology appointments and introduction of dried blood-spot testing. MEASUREMENTS For each clinic and period, we obtained the total number of clients and, as relevant, their status as PWID, tested for HCV, known HCV-positive, engaged with HCV therapy or treated. FINDINGS Compared with baseline, there was strong evidence that engagement with HCV therapy in the intervention year increased (P < 0.001) more in the HepCATT centres than controls, up + 31 percentage points [95% confidence interval (CI) = 19-43] versus -12 (CI = -31 to + 6) and odds ratio (OR) = 9.99 (CI = 4.42-22.6) versus 0.35 (CI = 0.08-1.56). HepCATT centres also had greater increases in HCV testing (OR = 3.06 versus 0.78, P < 0.001), referral to hepatology (OR = 9.60 versus 0.56, P < 0.001) and treatment initiation (OR = 9.5 versus 0.74, P < 0.001). CONCLUSIONS Introducing a half-time facilitator into drug and alcohol clinics in England increased engagement of HCV-positive people who inject drugs with hepatitis C virus care pathways, with increased uptake also of testing, referral to hepatology and initiation of treatment.
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Affiliation(s)
- Graham I Harrison
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, UK
| | - Karen Murray
- United Lincolnshire Hospitals Lincoln County Hospital, Lincoln, UK
| | - Roxanne Gore
- Royal Liverpool and Broadgreen University Hospitals NHS Trust, Liverpool, UK
| | | | | | - Paul Richardson
- Royal Liverpool and Broadgreen University Hospitals NHS Trust, Liverpool, UK
| | | | - Martin Wiselka
- University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Will Gelson
- Cambridge University Hospitals NHS Foundation Trust, Addenbrooke's Hospital, Cambridge, UK
| | - Esther Unitt
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | | | | | | | | | | | | | | | | | | | | | - Rosy Reynolds
- Population Health Sciences, University of Bristol, Bristol, UK
| | - Magdalena Harris
- Department of Social and Environmental Health Research, London School of Hygiene and Tropical Medicine, London, UK
| | - Matthew Hickman
- Population Health Sciences, University of Bristol, Bristol, UK
| | - William L Irving
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, UK
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Hughes AJ, Knoten CA, Morris AR, Hauser AR. ASC acts in a caspase-1-independent manner to worsen acute pneumonia caused by Pseudomonas aeruginosa. J Med Microbiol 2018; 67:1168-1180. [PMID: 29957172 DOI: 10.1099/jmm.0.000782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
PURPOSE Pseudomonas aeruginosa expresses a type III secretion system (T3SS) that activates the host inflammasome-mediated immune response. We examined the role of inflammasome activation in severe infection outcomes. METHODS We infected C57BL/6 (B6) mice lacking inflammasome components ASC or caspase-1/11 with a highly virulent strain of P. aeruginosa, PSE9, using a mouse model of pneumonia. We evaluated inflammasome activation in vitro by infecting bone marrow-derived macrophages (BMDMs) with PSE9 and measuring cell death and release of inflammasome-dependent cytokines IL-18 and IL-1β. A bioluminescent reporter assay was used to detect activity of caspase-1 and caspase-3/7 in BMDMs from B6 and ASC-deficient mice.Results/Key Findings. ASC-/- mice exhibited significantly improved survival relative to caspase-1/11-/- mice and B6 mice, demonstrating that ASC and caspase-1/11 play differential roles in P. aeruginosa infection. We found that ASC-/- BMDMs exhibited significantly reduced cell death relative to B6 BMDMs, while caspase-1/11-/- BMDMs were resistant to cell death. IL-18 and IL-1β were both detected from supernatants of infected B6 BMDMs, but cytokine release was abrogated in both ASC-/- and caspase-1/11-/- BMDMs. We detected a 2.5-fold increase in the activation of caspase-3/7 in PSE9-infected B6 BMDMs, but no increase in infected ASC-/- BMDMs. Cell death, cytokine release and caspase-3/7 activity were dependent on a functional T3SS. CONCLUSIONS Collectively, these results are consistent with a model whereby the T3SS apparatus of P. aeruginosa activates the caspase-1-dependent inflammasome and caspase-3/7 through an ASC-dependent mechanism. This activation may have implications for the outcomes of P. aeruginosa infections.
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Affiliation(s)
- A J Hughes
- 1Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - C A Knoten
- 1Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,†Present address: Academy for Quality and Safety Improvement, Northwestern Medicine, Chicago, IL, USA
| | - A R Morris
- 1Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - A R Hauser
- 2Department of Medicine, Division of Infectious Diseases, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,1Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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Bhattarai J, Dunn KM, Hughes AJ. 1016 Sleep Disturbance and Fatigue in Persons with Multiple Sclerosis (PwMS): A Meta-analysis. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J Bhattarai
- Johns Hopkins University School of Medicine, Department of Physical Medicine and Rehabilitation, Baltimore, MD
| | - K M Dunn
- Loyola University Maryland, Department of Psychology, Baltimore, MD
| | - A J Hughes
- Johns Hopkins University School of Medicine, Department of Physical Medicine and Rehabilitation, Baltimore, MD
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Hughes AJ, Richards JM, Campbell CM, Haythornthwaite JA, Edwards RR, Smith MT. 0910 Sleep-pain Behaviors Predict Insomnia, Pain, and Physical Function over One Year Following Total Knee Arthroplasty in Individuals with Knee Osteoarthritis. Sleep 2018. [DOI: 10.1093/sleep/zsy061.909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- A J Hughes
- Johns Hopkins University School of Medicine, Department of Physical Medicine and Rehabilitation, Baltimore, MD
| | - J M Richards
- Sinai Hospital of Baltimore, Division of Adult and Pediatric Medical Psychology, Baltimore, MD
| | - C M Campbell
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences, Baltimore, MD
| | - J A Haythornthwaite
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences, Baltimore, MD
| | - R R Edwards
- Brigham and Women’s Hospital, Department of Anesthesia, Boston, MA
| | - M T Smith
- Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences, Baltimore, MD
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Dunn KM, Bhattarai J, Hughes AJ. 1036 Insomnia And Fatigue In Multiple Sclerosis: A Subgroup Meta-analysis Comparing the PSQI, ISI, and MOS. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- K M Dunn
- Johns Hopkins University School of Medicine, Department of Physical Medicine and Rehabilitation, Baltimore, MD
- Loyola University Maryland, Department of Psychology, Baltimore, MD
| | - J Bhattarai
- Johns Hopkins University School of Medicine, Department of Physical Medicine and Rehabilitation, Baltimore, MD
| | - A J Hughes
- Johns Hopkins University School of Medicine, Department of Physical Medicine and Rehabilitation, Baltimore, MD
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Gill SD, Redden-Hoare JR, Hughes AJ, Dunning TL, Dolley PJ. Health services should collect point of service feedback – patient and staff opinions. Eur J Public Health 2015. [DOI: 10.1093/eurpub/ckv170.037] [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: 11/13/2022] Open
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Ludlam AH, Saxton PJ, Dickson NP, Hughes AJ. O16.6 General practitioner awareness of sexual orientation in a community and internet sample of gay and bisexual men in new zealand: implications for hpv vaccination. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.170] [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: 11/04/2022]
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Lachowsky NJ, Dewey CE, Dickson NP, Saxton PJW, Hughes AJ, Milhausen RR, Summerlee AJS. Habitual condom use across partner type and sexual position among younger gay and bisexual men: findings from New Zealand HIV behavioural surveillance 2006-2011. Sex Transm Infect 2015; 91:445-50. [PMID: 25605969 PMCID: PMC4552918 DOI: 10.1136/sextrans-2014-051759] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 12/14/2014] [Indexed: 11/09/2022] Open
Abstract
Objectives Our objectives were to investigate demographic and behavioural factors associated with condom use and to examine how habitual condom use was across partner types and sexual positions among younger men who have sex with men (YMSM), aged 16–29, surveyed in New Zealand. Methods We analysed the 2006–2011 national HIV behavioural surveillance data from YMSM who reported anal intercourse in four scenarios of partner type and sexual position: casual insertive, casual receptive, regular insertive and regular receptive. For each, respondents’ condom use was classified as frequent (always/almost always) or otherwise, with associated factors identified with multivariate mixed-effect logistic regression. Habitual condom use across scenarios was examined using a latent variable technique that estimated the intraclass correlation coefficient (ICC). Results Frequent condom use was reported for 63.6% of 5153 scenarios reported from 2412 YMSM. Frequent use increased from boyfriend to fuckbuddy to casual partners. Infrequent use was associated with online recruitment, Pacific ethnicity, less education, HIV positivity, sex with women, having ≥20 sexual partners versus 1 and reporting insertive and receptive sexual positions. Frequent condom use was associated with having two to five sexual partners versus one and shorter regular partnerships. The ICC=0.865 indicated highly habitual patterns of use; habitual infrequent condom use was most prevalent with regular partners (53.3%) and habitual frequent condom use was most prevalent with casual partners (70.2%) and for either sexual position (50.5% and 49.1%). Conclusions Habitual condom use among YMSM highlights the value of early, engaging and sustained condom promotion. Public health should provide better and more compelling condom education, training and promotion for YMSM.
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Affiliation(s)
- N J Lachowsky
- Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada Centre for Public Health and Zoonoses, University of Guelph, Guelph, Ontario Canada
| | - C E Dewey
- Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada Centre for Public Health and Zoonoses, University of Guelph, Guelph, Ontario Canada
| | - N P Dickson
- Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand
| | - P J W Saxton
- Department of Social and Community Health, University of Auckland, Auckland, New Zealand
| | - A J Hughes
- Research Analysis and Information Unit, New Zealand AIDS Foundation, Auckland, New Zealand
| | - R R Milhausen
- Department of Family Relations and Applied Nutrition, University of Guelph, Guelph, Ontario, Canada
| | - A J S Summerlee
- Department of Biomedical Science, University of Guelph, Guelph, Ontario, Canada
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Lachowsky NJ, Saxton PJW, Hughes AJ, Dickson NP, Summerlee AJS, Dewey CE. P4.032 Younger Gay and Bisexual Men’s Condom Use with Main Sexual Partner in New Zealand. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.0930] [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: 11/04/2022]
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Saxton PJW, Dickson NP, McAllister SM, Hughes AJ, Sharples K. HIV prevalence among men who have sex with men in New Zealand 1985–2009: 25 years of public health monitoring. Int J STD AIDS 2012; 23:274-9. [DOI: 10.1258/ijsa.2011.011213] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Annual population-based estimates of the number of men who have sex with men (MSM) with diagnosed HIV infection (HIV prevalence pool), and the proportion of all MSM this represents (HIV prevalence), have been insufficiently described over the long term. We investigated the dynamic effects of ongoing HIV diagnoses, lower mortality due to treatment and growth in the MSM population over time on these two epidemic indicators using national HIV/AIDS surveillance data in New Zealand, 1985–2009. The diagnosed HIV prevalence pool rose 79% between 1989 and 1999, and 137% between 1999 and 2009. Estimates of diagnosed HIV prevalence as a proportion of MSM were 0.2% of MSM in 1985, and were between 1.5% and 5.0% of MSM by 2009. New Zealand continues to have a relatively low-prevalence HIV epidemic among MSM; however, the number of MSM living with diagnosed infection is growing rapidly 25 years after HIV testing was introduced.
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Affiliation(s)
- P J W Saxton
- AIDS Epidemiology Group, Department of Preventive and Social Medicine, University of Otago Medical School, PO Box 913, Dunedin
- Research Unit, New Zealand AIDS Foundation, Auckland, New Zealand
| | - N P Dickson
- AIDS Epidemiology Group, Department of Preventive and Social Medicine, University of Otago Medical School, PO Box 913, Dunedin
| | - S M McAllister
- AIDS Epidemiology Group, Department of Preventive and Social Medicine, University of Otago Medical School, PO Box 913, Dunedin
| | - A J Hughes
- Research Unit, New Zealand AIDS Foundation, Auckland, New Zealand
| | - K Sharples
- AIDS Epidemiology Group, Department of Preventive and Social Medicine, University of Otago Medical School, PO Box 913, Dunedin
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Hughes AJ, Detelich JF, Keatinge-Clay AT. Employing a polyketide synthase module and thioesterase in the semipreparative biocatalysis of diverse triketide pyrones. Med Chem Commun 2012. [DOI: 10.1039/c2md20013a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lebedenko VN, Araújo HM, Barnes EJ, Bewick A, Cashmore R, Chepel V, Currie A, Davidge D, Dawson J, Durkin T, Edwards B, Ghag C, Horn M, Howard AS, Hughes AJ, Jones WG, Joshi M, Kalmus GE, Kovalenko AG, Lindote A, Liubarsky I, Lopes MI, Lüscher R, Lyons K, Majewski P, Murphy ASJ, Neves F, da Cunha JP, Preece R, Quenby JJ, Scovell PR, Silva C, Solovov VN, Smith NJT, Smith PF, Stekhanov VN, Sumner TJ, Thorne C, Walker RJ. Limits on the spin-dependent WIMP-nucleon cross sections from the first science run of the ZEPLIN-III experiment. Phys Rev Lett 2009; 103:151302. [PMID: 19905617 DOI: 10.1103/physrevlett.103.151302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 09/03/2009] [Indexed: 05/28/2023]
Abstract
We present new experimental constraints on the WIMP-nucleon spin-dependent elastic cross sections using data from the first science run of ZEPLIN-III, a two-phase xenon experiment searching for galactic dark matter weakly interacting massive particles based at the Boulby mine. Analysis of approximately 450 kg x days fiducial exposure allow us to place a 90%-confidence upper limit on the pure WIMP-neutron cross section of sigma(n)=1.9x10(-2) pb at 55 GeV/c(2) WIMP mass. Recent calculations of the nuclear spin structure based on the Bonn charge-dependent nucleon-nucleon potential were used for the odd-neutron isotopes 129Xe and 131Xe. These indicate that the sensitivity of xenon targets to the spin-dependent WIMP-proton interaction could be much lower than implied by previous calculations, whereas the WIMP-neutron sensitivity is impaired only by a factor of approximately 2.
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Affiliation(s)
- V N Lebedenko
- Blackett Laboratory, Imperial College London, London, United Kingdom
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Hughes AJ, Vudiniabola ST, McMillan BD, Smith AC. Rotational drift of mandibular third molar teeth: a series of four cases. Aust Dent J 2009; 54:54-6. [PMID: 19228134 DOI: 10.1111/j.1834-7819.2008.01089.x] [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: 11/29/2022]
Abstract
Rotational drift of mandibular third molar teeth is a challenge for clinicians to predict and manage. Evidence on the incidence and degree of rotation is sparse. As the factors influencing rotation are not defined, prediction is impossible. A series of four cases with lower third molar rotation are presented and discussed. Significant rotation can alter the degree of difficulty for an extraction. A lack of well-documented cases has hindered investigation of this phenomenon. Further research is required to identify the aetiology, incidence and increase in risk factors caused by such rotational drift.
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Affiliation(s)
- A J Hughes
- Royal Australian Navy and Melbourne Dental School, The University of Melbourne, Victoria
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Baumbauer KM, Hoy KC, Huie JR, Hughes AJ, Woller SA, Puga DA, Setlow B, Grau JW. Timing in the absence of supraspinal input I: variable, but not fixed, spaced stimulation of the sciatic nerve undermines spinally-mediated instrumental learning. Neuroscience 2008; 155:1030-47. [PMID: 18674601 DOI: 10.1016/j.neuroscience.2008.07.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Revised: 06/27/2008] [Accepted: 07/02/2008] [Indexed: 10/21/2022]
Abstract
Rats with complete spinal transections are capable of acquiring a simple instrumentally trained response. If rats receive shock to one hind limb when the limb is extended (controllable shock), the spinal cord will learn to hold the leg in a flexed position that minimizes shock exposure. If shock is delivered irrespective of leg position, subjects do not exhibit an increase in flexion duration and subsequently fail to learn when tested with controllable shock (learning deficit). Just 6 min of variable intermittent shock produces a learning deficit that lasts 24 h. Evidence suggests that the neural mechanisms underlying the learning deficit may be related to those involved in other instances of spinal plasticity (e.g. windup, long-term potentiation). The present paper begins to explore these relations by demonstrating that direct stimulation of the sciatic nerve also impairs instrumental learning. Six minutes of electrical stimulation (mono- or biphasic direct current [DC]) of the sciatic nerve in spinally transected rats produced a voltage-dependent learning deficit that persisted for 24 h (experiments 1-2) and was dependent on C-fiber activation (experiment 7). Exposure to continuous stimulation did not produce a deficit, but intermittent burst or single pulse (as short as 0.1 ms) stimulation (delivered at a frequency of 0.5 Hz) did, irrespective of the pattern (fixed or variable) of stimulus delivery (experiments 3-6, 8). When the duration of stimulation was extended from 6 to 30 min, a surprising result emerged; shocks applied in a random (variable) fashion impaired subsequent learning whereas shocks given in a regular pattern (fixed spacing) did not (experiments 9-10). The results imply that spinal neurons are sensitive to temporal relations and that stimulation at regular intervals can have a restorative effect.
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Affiliation(s)
- K M Baumbauer
- Department of Psychology, Texas A&M University, College Station, TX 77843-4325, USA.
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Hughes AJ, Hutchinson P, Gooding T, Freezer NJ, Holdsworth SR, Johnson PDR. Diagnosis of Mycobacterium tuberculosis infection using ESAT-6 and intracellular cytokine cytometry. Clin Exp Immunol 2005; 142:132-9. [PMID: 16178867 PMCID: PMC1809478 DOI: 10.1111/j.1365-2249.2005.02884.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Diagnosis of infection with Mycobacterium tuberculosis (MTB) using tuberculin skin testing (TST) is often hampered by prior Bacille Calmette-Guérin (BCG) vaccination. ESAT-6 is a protein that is expressed by MTB but absent in BCG. It has been postulated that it might be useful in distinguishing MTB-specific immune responses. This study measured CD4 T cell responder frequencies specific for ESAT-6 and the TST reagent purified protein derivative (PPD) in patients with tuberculosis (n = 16), controls with non-tuberculous pneumonia (n = 8) and normal subjects (n = 7). Responses were identified using the intracellular cytokine staining technique and flow cytometry on whole blood samples, and performed blinded to the patient condition. Antigen-specific CD4 cells were defined by CD69 positivity and one or more cytokine [interleukin (IL)-2, IL-4, IL-10, interferon (IFN)-gamma] and/or CD40L positivity. With ESAT-6 stimulation it was found that TB patients had significantly higher frequencies of IFN-gamma and CD40L-positive CD4 T cells compared to the normal group, while no significant differences were measured with PPD stimulation. A responder frequency of 0.01% or higher for at least one of the measured cytokines/CD40L was defined as a positive response. Using this criterion to compare the two patient groups, PPD had 100% sensitivity but 0% specificity while ESAT-6 had 100% sensitivity and 88% specificity. Use of MTB-specific proteins such as ESAT-6 in combination with intracellular cytokine staining and flow cytometry has the potential to identify individuals with MTB infection.
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Affiliation(s)
- A J Hughes
- Department of Respiratory Medicine, Monash Medical Centre, Melbourne, Victoria, Australia
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Abstract
BACKGROUND The presence of Lewy bodies (LB) in the neocortex and limbic system in patients with Parkinson's disease (PD) is commonly thought to be linked with cognitive impairment. The authors present here a series of patients with diagnosis of PD in life and no significant cognitive impairment who, at necropsy, satisfied the current neuropathological criteria for dementia with Lewy bodies (DLB). METHODS Two hundred and seventy six brains with PD pathology were examined at the Queen Square Brain Bank in London between 1993 and 1999. The neuropathological diagnosis was PD, but 117 patients also had sufficient LB involvement above the brain stem to satisfy the current neuropathological criteria for DLB (50 patients had a neuropathological picture consistent with the limbic category of DLB and 67 with neocortical DLB). Forty eight cases were excluded who developed early cognitive impairment together with motor features of parkinsonism, 12 cases for lack of detailed clinical history, and 19 cases with coexistent features of advanced Alzheimer's disease changes. Thirty eight patients (13.8% of the total with PD pathology and 32.5 % of the total with DLB pathology) were found where there was no or very late cognitive impairment reported in the clinical records. RESULTS Selected cases were 24 men and 14 women, with a mean (SD) age at onset of parkinsonian symptoms of 60.1 (10.1) years and a mean disease duration of 15.3 (5.5) years. At some time during the evolution of the disease 21 patients developed different degrees of cognitive impairment (after a mean disease duration of 12.2 (4.8) years). Clinical diagnosis at death was PD in 10 cases and PD with dementia in 11. In the remaining 17 patients no history of cognitive impairment was ever recorded in life and all of them had a clinical diagnosis of PD at death; in this subgroup, nine patients later revealed a neuropathological picture consistent with limbic (or transitional) category of DLB and eight with neocortical DLB. Interestingly, in all these patients the parkinsonian features including the response to dopaminergic drugs were indistinguishable from classic brain stem PD. CONCLUSIONS The authors demonstrate that the classic pathology of DLB can commonly be seen outside the generally accepted clinical spectrum for DLB and that important factors other than the absolute number of LB in the neocortex and limbic system influence the development of cognitive impairment in PD. Furthermore, the pathology of PD may be indistinguishable from that reported in DLB, suggesting that the two clinicopathological syndromes may be attributable to the same biological abnormality.
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Affiliation(s)
- C Colosimo
- Queen Square Brain Bank for Neurological Disorders, Institute of Neurology, London, UK
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26
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Hughes AJ, Bowling TE. Letters to the Editor. Nutr Clin Pract 2003; 18:268-9. [PMID: 16215048 DOI: 10.1177/0115426503018003268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Abstract
The diagnosis and management of parasitic diseases of the central nervous system (CNS) is difficult, even for infectious diseases physicians and neurologists. Furthermore, few overviews of the spectrum of causative helminths and clinical syndromes have been published. In the present study, we review the seven most common parasitic diseases of the CNS: (i) cysticercosis, (ii) neuroschistosomiasis, (iii) paragonimiasis, (iv) angiostrongyliasis, (v) hydatid disease, (vi) sparganosis and (vii) gnathostomiasis. Major syndromes of parasitic disease of the CNS and their differential causes are discussed, including: (i) cystic lesions, (ii) enhancing granulomas (with and without creeping subcutaneous eruptions), (iii) eosinophilic meningoencephalitis and (iv) spinal cord disease. Specific risk factors that predispose to these infections are also discussed and particular attention is drawn to the situation in Australia.
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Affiliation(s)
- A J Hughes
- University of Malaya Medical Centre, Kuala Lumpur, Malaysia
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Abstract
BACKGROUND Gastrointestinal manifestations are seen in systemic sclerosis and mixed connective tissue disorders but are rare in pure polymyositis. CASE REPORT A 44 year old woman with polymyositis who developed total gut failure requiring treatment with total parenteral nutrition is described. RESULTS The patient's polymyositis is now fully controlled biochemically, but her gastrointestinal symptoms persist.
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Affiliation(s)
- A J Hughes
- Department of Gastroenterology, Selly Oak Hospital, Raddlebarn Road, Birmingham B29 6JD, UK
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Hughes AJ, Ben-Shlomo Y, Daniel SE, Lees AJ. What features improve the accuracy of clinical diagnosis in Parkinson's disease: a clinicopathologic study. 1992. Neurology 2001; 57:S34-8. [PMID: 11775598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
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Abstract
The authors studied the accuracy of clinical diagnosis of idiopathic PD (IPD) in 100 consecutive clinically diagnosed cases that came to neuropathological examination. Ninety fulfilled pathologic criteria for IPD. Ten were misdiagnosed: multiple system atrophy (six), progressive supranuclear palsy (two), post-encephalitic parkinsonism (one), and vascular parkinsonism (one). Assessment of the clinical features suggests that an accuracy of 90% may be the highest that can be expected using current diagnostic criteria.
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Affiliation(s)
- A J Hughes
- United Kingdom Parkinson's Disease Society Brain Research Centre, Institute of Neurology, London, UK
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Abstract
We used positron emission tomography (PET) with 15O-labelled water to record patterns of cerebral activation in six patients with Parkinson's disease (PD), studied when clinically "off" and after turning "on" as a result of dopaminergic stimulation. They were asked to imagine a finger opposition movement performed with their right hand, externally paced at a rate of 1 Hz. Trials alternating between motor imagery and rest were measured. A pilot study of three age-matched controls was also performed. We chose the task as a robust method of activating the supplementary motor area (SMA), defects of which have been reported in PD. The PD patients showed normal degrees of activation of the SMA (proper) when both "off" and "on." Significant activation with imagining movement also occurred in the ipsilateral inferior parietal cortex (both "off" and when "on") and ipsilateral premotor cortex (when "off" only). The patients showed significantly greater activation of the rostral anterior cingulate and significantly less activation of the left lingual gyrus and precuneus when performing the task "on" compared with their performance when "off." PD patients when imagining movement and "off" showed less activation of several sites including the right dorsolateral prefrontal cortex (DLPFC) when compared to the controls performing the same task. No significant differences from controls were present when the patients imagined when "on." Our results are consistent with other studies showing deficits of pre-SMA function in PD with preserved function of the SMA proper. In addition to the areas of reduced activation (anterior cingulate, DLPFC), there were also sites of activation (ipsilateral premotor and inferior parietal cortex) previously reported as locations of compensatory overactivity for PD patients performing similar tasks. Both failure of activation and compensatory changes are likely to contribute to the motor deficit in PD.
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Affiliation(s)
- R Cunnington
- Neuropsychology Research Unit, Department of Psychology, Monash University, Clayton, Victoria, Australia
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Bourke PJ, Butterworth J, Drain LE, Egelstaff PA, Hughes AJ, Hutchinson P, Jackson DA, Jakeman E, Moss B, O'Shaughnessy J, Pike ER, Schofield P. A study of the spatial structure of turbulent flow by intensity-fluctuation spectroscopy. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0305-4470/3/2/013] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hughes AJ, Jakeman E, Oliver CJ, Pike ER. Photon-correlation spectroscopy: dependence of linewidth error on normalization, clip level, detector area, sample time and count rate. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0305-4470/6/9/008] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Howells DW, Porritt MJ, Wong JY, Batchelor PE, Kalnins R, Hughes AJ, Donnan GA. Reduced BDNF mRNA expression in the Parkinson's disease substantia nigra. Exp Neurol 2000; 166:127-35. [PMID: 11031089 DOI: 10.1006/exnr.2000.7483] [Citation(s) in RCA: 351] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Brain-derived neurotrophic factor (BDNF) has potent effects on survival and morphology of dopaminergic neurons and thus its loss could contribute to death of these cells in Parkinson's disease (PD). In situ hybridization revealed that BDNF mRNA is strongly expressed by dopaminergic neurons in control substantia nigra pars compacta (SNpc). In clinically and neuropathologically typical PD, SNpc BDNF mRNA expression is reduced by 70% (P = 0.001). This reduction is due, in part, to loss of dopaminergic neurons which express BDNF. However, surviving dopaminergic neurons in the PD SNpc also expressed less BDNF mRNA (20%, P = 0.02) than their normal counterparts. Moreover, while 15% of control neurons had BDNF mRNA expression >1 SD below the control mean, twice as many (28%) of the surviving PD SNpc dopaminergic neurons had BDNF mRNA expression below this value. This 13% difference in proportions (95% CI 8-17%, P < or = 0.000001) indicates the presence of a subset of neurons in PD with particularly low BDNF mRNA expression. Moreover, both control and PD neurons displayed a direct relationship between the density of BDNF mRNA expression per square micrometer of cell surface and neuronal size (r(2) = 0.93, P </= 0.00001) which was lost only in PD neurons expressing the lowest levels of BDNF mRNA. If BDNF is an autocrine/paracrine factor for SNpc dopaminergic neurons, loss of BDNF-expressing neurons may compromise the well-being of their surviving neighbors. Moreover, neurons expressing particularly low levels of BDNF mRNA may be those at greatest risk of injury in PD and possibly the trigger for the degeneration itself.
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Affiliation(s)
- D W Howells
- Department of Medicine, University of Melbourne, Heidelberg, Victoria, 3084, Australia
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Abstract
A new population of dopaminergic neurons has been identified in Parkinson's disease striatum. These neurons are sufficiently numerous to have an important effect on dopaminergic function in the striatum.
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Abstract
This study examined the acoustic and perceptual voice characteristics of patients with Parkinson's disease according to disease severity. The perceptual and acoustic voice characteristics of 30 patients with early stage PD and 30 patients with later stage PD were compared with data from 30 normal control subjects. Voice recordings consisted of prolongation of the vowel /a/, scale singing, and a 1-min monologue. In comparison with controls and previously published normative data, both early and later stage PD patients' voices were characterized perceptually by limited pitch and loudness variability, breathiness, harshness and reduced loudness. High modal pitch levels also characterized the voices of males in both early and later stages of PD. Acoustically, the voices of both groups of PD patients demonstrated lower mean intensity levels and reduced maximum phonational frequency ranges in comparison with normative data. Although less clear, the present data also suggested that the PD patients' voices were characterized by excess jitter, a high-speaking fundamental frequency for males and a reduced fundamental frequency variability for females. While several of these voice features did not appear to deteriorate with disease progression (i.e. harshness, high modal pitch and speaking fundamental frequency in males, fundamental frequency variability in females, low intensity and jitter), breathiness, monopitch and monoloudness, low loudness and reduced maximum phonational frequency range were all worse in the later stages of PD. Tremor was the sole voice feature which was associated only with later stage PD.
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Affiliation(s)
- R J Holmes
- School of Human Communication Sciences, Faculty of Health Sciences, La Trobe University, Bundoora, Australia
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Hughes AJ. Apomorphine test in the assessment of parkinsonian patients: a meta-analysis. Adv Neurol 1999; 80:363-8. [PMID: 10410742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- A J Hughes
- Department of Neurology, Austin and Repatriation Medical Centre, Heidelberg West, Victoria, Australia
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O'Sullivan JD, Lees AJ, Hughes AJ. Yawning in Parkinson's disease. Neurology 1999; 52:428. [PMID: 9932982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
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O'Sullivan JD, Said CM, Dillon LC, Hoffman M, Hughes AJ. Gait analysis in patients with Parkinson's disease and motor fluctuations: influence of levodopa and comparison with other measures of motor function. Mov Disord 1998; 13:900-6. [PMID: 9827613 DOI: 10.1002/mds.870130607] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.8] [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: 11/08/2022] Open
Abstract
Although clinical rating scales and simple timed tests of motor function are widely used to assess motor response to therapy, gait analysis may provide an alternative measure of this response. We studied 15 patients with PD complicated by motor fluctuations, first to determine changes in temporal and spatial gait parameters following levodopa, secondly to assess the stability of repeated gait measures and timed tests in "off" and "on" states, and thirdly to determine the use of gait analysis in the assessment of the dopaminergic response. Gait analysis (velocity, stride length, cadence, and double limb support), clinical rating scales (modified Webster scale and Hoehn and Yahr stage), and timed tests of motor function (hand tapping and stand-walk-sit time) were performed before ("off") and after ("on") a levodopa challenge. Stride length and gait velocity increased following medication whereas cadence and double limb support did not. Most gait measures and the stand-walk-sit time were stable over three consecutive trials in both "off" and "on" states. Of the gait measures, only cadence in the "off" state changed significantly whereas the tapping count improved with repeated trials in both "off" and "on" states. Changes in stride length, gait velocity, and tapping count following levodopa correlated with changes in clinical rating scales following treatment. Measurement of gait parameters provides a reliable, objective alternative to rating scales and timed tests in assessing the dopaminergic response in patients with PD and motor fluctuations.
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Affiliation(s)
- J D O'Sullivan
- Department of Neurology, Austin & Repatriation Medical Centre, Melbourne, Victoria, Australia
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Abstract
Haemorrhagic cystitis is a common and often debilitating complication of chemotherapy for which treatment is frequently unsatisfactory. With over 80 cases reported of radiation-induced cystitis treated successfully with hyperbaric oxygen, attention is now turning to the treatment of chemotherapeutic agent-induced cystitis. We report a case of haemorrhagic cystitis occurring after autologous peripheral blood stem cell transplantation for multiple myeloma. The patient had received cyclophosphamide and busulfan and had BK and adenoviruria. The haemorrhage was refractory to multiple conventional treatments but resolved after a course of hyperbaric oxygen.
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Affiliation(s)
- A J Hughes
- Bone Marrow Transplant Programme, Alfred Hospital, Melbourne, Australia
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Abstract
Penile erections were regularly induced by intermittent subcutaneous injections of apomorphine in five patients with Parkinson's disease (PD) complicated by motor fluctuations. Four of the patients reported erectile dysfunction before beginning apomorphine and two of these report a significant improvement in their sexual function resulting from apomorphine use. Animal studies suggest central D2-type dopamine receptor stimulation and oxytocin release from the paraventricular nucleus of the hypothalamus mediate the effect. Erections reported with other dopamine agonists and levodopa are probably mediated by the same mechanism. Apomorphine-induced erections in PD are probably more common than previously thought. The benefit of apomorphine on sexual function in some patients suggests a possible role in the treatment of impotence in PD.
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Affiliation(s)
- J D O'Sullivan
- Neurology Department, Austin & Repatriation Medical Centre, West Heidelberg, Victoria, Australia
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Colosimo C, Merello M, Hughes AJ, Sieradzan K, Lees AJ. Apomorphine responses in Parkinson's disease and the pathogenesis of motor complications. Neurology 1998; 50:573-4. [PMID: 9484410 DOI: 10.1212/wnl.50.2.573-b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Abstract
Clinicopathological studies have shown that the accuracy of a clinical diagnosis of Parkinson's disease (PD) is less than 80%. More selected diagnostic criteria can increase the proportion of true PD cases identified to more than 90%. However, by using these criteria almost a third of pathologically confirmed cases may be rejected. Awareness of the high misdiagnosis rate and refinements in the clinical diagnostic criteria for other conditions that may present with parkinsonism seem to have led to an improvement in the accuracy of diagnosis to 84%. Cortical Lewy bodies, often in small numbers, are seen in almost all patients with PD. This has prompted intense efforts to clarify both the clinical and pathological criteria for diffuse Lewy body disease. The nomenclature of conditions with plentiful numbers of Lewy bodies in the neocortex and the relevance of associated pathology has become confusing and the subject of intense nosological debate. A recent consensus paper has suggested clinical and pathological diagnostic criteria for what has been termed 'dementia with Lewy bodies'. This new term awaits general acceptance while the proposed diagnostic criteria remain to be validated. The neuropathological substrate of dementia in PD continues to receive a lot of attention with suggestions that additive deficits from pathology in both cortical and subcortical structures probably explain most of the dementia seen in PD.
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Affiliation(s)
- A J Hughes
- Department of Neurology, Austin and Repatriation Medical Centre (Repatriation Campus), Heidelberg West, Vic., Australia
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Abstract
OBJECTIVES To determine the degree of dopaminergic response of swallowing dysfunction in Parkinson's disease. METHODS Fifteen patients with idiopathic Parkinson's disease and symptomatic dysphagia were studied. All had motor fluctuations in response to long term levodopa therapy. On two separate days, after overnight withdrawal of all antiparkinsonian medication, a modified barium swallow using cinefluoroscopy and different food consistencies was performed before and after administration of oral levodopa and subcutaneous apomorphine. RESULTS Despite all patients having an unequivocal motor response to both agents, there were few significant responses in any of the quantitative or qualitative criteria of swallowing dysfunction assessed. The oral preparatory phase, generally considered a more voluntary component of swallowing, showed a response, but not with all consistencies. In a subgroup of patients the pharyngeal phase time also improved. CONCLUSIONS These findings suggest that parkinsonian swallowing dysfunction is not solely related to nigrostriatal dopamine deficiency and may be due to an additional non-dopamine related disturbance of the central pattern generator for swallowing in the pedunculopontine nucleus or related structures in the medulla.
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Affiliation(s)
- P C Hunter
- Department of Aged Care Services, Austin and Repatriation Medical Centre, Heidelberg, Victoria, Australia
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47
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Abstract
Advances in the medical treatment of Parkinson's disease have improved the disability related to complications of long term levodopa therapy, including motor fluctuations, dyskinesias and neuropsychiatric toxicity. A range of new dopamine agonists are in various stages of preclinical and clinical development. Cabergoline appears to be effective in improving moderate motor fluctuations, and a number of dopamine partial agonists that can act as either agonists or antagonists depending on the degree of denervation and receptor sensitivity are being investigated. Apomorphine represents a significant advance in the treatment of well developed motor fluctuations in selected patients who are able to master the technique of subcutaneous administration. The catecholamine-O-methyl transferase inhibitors are proving useful in phase III studies in the management of patients with moderate motor fluctuations. A role for glutamate antagonists is supported by animal and early clinical data, although the poor therapeutic index associated with the currently available nonselective, noncompetitive glutamate antagonists has prompted a search for more selective antagonists with less toxicity. The management of levodopa-induced dyskinesias remains a major therapeutic challenge. Some reports of dopamine partial agonists, selective D2 receptor antagonists and atypical antipsychotics being useful await confirmation. Neuropsychiatric toxicity probably remains the major dose-limiting adverse effect of levodopa and is a major reason for parkinsonian patients being admitted to nursing homes. The development of new atypical antipsychotics with improved therapeutic indices, along with the possible use of serotonergic antagonists, may improve management of this difficult problem. The challenge will be to fit these new forms of treatment into our present range of available drugs and to assess their relative role within the emerging framework of functional neurosurgery for parkinsonian disability.
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Affiliation(s)
- A J Hughes
- Austin and Repatriation Medical Centre, Heidelberg, Victoria, Australia
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Colosimo C, Merello M, Hughes AJ, Sieradzan K, Lees AJ. Motor response to acute dopaminergic challenge with apomorphine and levodopa in Parkinson's disease: implications for the pathogenesis of the on-off phenomenon. J Neurol Neurosurg Psychiatry 1996; 60:634-7. [PMID: 8648329 PMCID: PMC1073946 DOI: 10.1136/jnnp.60.6.634] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVES To evaluate the contribution of postsynaptic changes to motor fluctuations, three groups of parkinsonian patients with differing responses to treatment were acutely challenged with two dopaminergic drugs-apomorphine and levodopa-having different mechanisms of action. METHODS Forty two patients with Parkinson's disease (14 untreated, eight with a stable response to levodopa, and 20 with levodopa induced motor fluctuations) were challenged on two consecutive days with apomorphine and levodopa. The latency, duration, and magnitude of motor response was measured. RESULTS A progressive shortening of mean latency after levodopa challenge was found passing from the untreated to the stable and fluctuating groups; the difference between untreated and fluctuating patients was statistically significant (P < 0.01). Response duration after levodopa challenge was similar in untreated and stable patients, whereas it showed a significant shortening in patients with motor fluctuations (P < 0.05 v both untreated and stable patients). When subcutaneous apomorphine was given, untreated patients had a longer response duration than those who had developed motor fluctuations (P < 0.05). Although baseline disability was significantly greater in the fluctuating patients than in the untreated and stable patients, the severity of residual parkinsonian signs after both apomorphine and levodopa challenge was similar for all three groups; as a result, the degree of improvement in parkinsonian signs after dopaminergic stimulation was substantially greater in more advanced than in early cases. Linear regression analysis also indicated that latency and duration after apomorphine challenge did not significantly correlate with those after levodopa challenge, whereas magnitude of response to apomorphine showed a strong positive correlation with that after levodopa challenge (r = 0.9, P < 0.001). CONCLUSION The progressive shortening of motor response after both apomorphine and levodopa suggests that pharmacodynamic factors play an important part in determining the duration of motor response and argue against altered central pharmacokinetics of levodopa being principally responsible for the on-off effect. The widening response amplitude and increasing off phase disability occurring during disease progression are also critical factors in determining the appearance of motor fluctuations.
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Affiliation(s)
- C Colosimo
- Department of Neurology, Middlesex Hospital, London, UK
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Sacchi N, Schiaffonati L, Magnani I, Pappalardo C, Hughes AJ, Darfler M, Hoogeveen AT. Detection and subcellular localization of an AML1 chimeric protein in the t(8;21) positive acute myeloid leukemia. Oncogene 1996; 12:437-44. [PMID: 8570222] [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] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
AML1, a gene encoding a protein of the PEBP2/CBF family of transcription factors is disrupted by translocations associated with human leukemia. In the t(8;21) acute myelogenous leukemia (AML), AML1 was found fused to a gene on chromosome 8 that we designated CDR (also known as ETO and MTG8). Immunoprecipitation experiments followed by immunoblotting using a combination of antibodies against different epitopes of one of the predicted chimeric proteins encoded by a fully characterized fusion transcript enabled us to visualize a chimeric protein in the t(8;21) Kasumi-1 cell line. The estimated size of this protein is 64 kDa. Immunoblotting of leukemic blasts containing the t(8;21) detected a protein of the same size. Immunofluorescence experiments indicate that the chimeric protein is localized in the nucleus. A normal AML1 protein of 27 kDa was also detected in t(8;21) Kasumi-1 cells. It remains to be established by which mechanism the mutant AML1 isoform may contribute to the leukemogenesis process of t(8;21)-positive acute myeloid leukemia.
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Affiliation(s)
- N Sacchi
- Department of Biology and Genetics, Medical School, University of Milan, Italy
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Colosimo C, Albanese A, Hughes AJ, de Bruin VM, Lees AJ. Some specific clinical features differentiate multiple system atrophy (striatonigral variety) from Parkinson's disease. Arch Neurol 1995; 52:294-8. [PMID: 7872884 DOI: 10.1001/archneur.1995.00540270090024] [Citation(s) in RCA: 113] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
OBJECTIVE The clinical recognition of multiple system atrophy (MSA) in patients presenting with parkinsonian signs is difficult. We attempted to verify the predictive value of some pointers that are used in clinical practice. DESIGN Sixteen consecutive patients with pathologically confirmed MSA who presented with a parkinsonian syndrome over an 8-year period were studied retrospectively, and their clinical features were analyzed in detail. SETTING Parkinson's Disease Society, Brain Tissue Bank, Institute of Neurology, London, England. PATIENTS Sixteen patients with pathologically proven MSA who presented with parkinsonian syndrome in the first 3 years since disease onset. METHODS Clinical features that were analyzed included the rapidity of disease progression, the relative symmetry of symptom onset, the presence or absence of tremor at initial presentation, the therapeutic response to levodopa and the associated presence of autonomic dysfunction. Fourteen of the 16 patients also had a computed tomographic scan of the brain performed. The frequency of selected items in MSA was compared with that found in 20 pathologically confirmed cases of Parkinson's disease and 16 pathologically confirmed cases of progressive supranuclear palsy (Steele-Richardson-Olszewski disease). RESULTS It was found that a probability scale based on five selected items discriminated MSA with a pure parkinsonian presentation from Parkinson's disease, but not from progressive supranuclear palsy. Patients affected by the latter disorder, however, commonly presented with additional clinical features (supranuclear vertical down-gaze palsy, axial dystonia, and cognitive impairment), which helped to differentiate it from MSA.
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Affiliation(s)
- C Colosimo
- Department of Neurology, Middlesex Hospital, London, England
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