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Wong CY, Au HY, Chan KY, Gill H. Prioritising the psychosocial needs of young oncology patients: a call for comprehensive care. Hong Kong Med J 2024; 30:186. [PMID: 38594969 DOI: 10.12809/hkmj2311405] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024] Open
Affiliation(s)
- C Y Wong
- Palliative Medical Unit, Grantham Hospital, Hong Kong SAR, China
| | - H Y Au
- Palliative Medical Unit, Grantham Hospital, Hong Kong SAR, China
| | - K Y Chan
- Palliative Medical Unit, Grantham Hospital, Hong Kong SAR, China
| | - H Gill
- Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
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2
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Lau J, Gill H, Taniguti CH, Young EL, Klein PE, Byrne DH, Riera-Lizarazu O. QTL discovery for resistance to black spot and cercospora leaf spot, and defoliation in two interconnected F1 bi-parental tetraploid garden rose populations. Front Plant Sci 2023; 14:1209445. [PMID: 37575936 PMCID: PMC10413565 DOI: 10.3389/fpls.2023.1209445] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/19/2023] [Indexed: 08/15/2023]
Abstract
Garden roses are an economically important horticultural crop worldwide, and two major fungal pathogens, black spot (Diplocarpon rosae F.A. Wolf) and cercospora leaf spot of rose (Rosisphaerella rosicola Pass.), affect both the health and ornamental value of the plant. Most studies on black spot disease resistance have focused on diploid germplasm, and little work has been performed on cercospora leaf spot resistance. With the use of newly developed software tools for autopolyploid genetics, two interconnected tetraploid garden rose F1 populations (phenotyped over the course of 3 years) were used for quantitative trait locus (QTL) analysis of black spot and cercospora leaf spot resistance as well as plant defoliation. QTLs for black spot resistance were mapped to linkage groups (LGs) 1-6. QTLs for cercospora resistance and susceptibility were found in LGs 1, 4, and 5 and for defoliation in LGs 1, 3, and 5. The major locus on LG 5 for black spot resistance coincides with the previously discovered Rdr4 locus inherited from Rosa L. 'Radbrite' (Brite Eyes™), the common parent used in these mapping populations. This work is the first report of any QTL for cercospora resistance/susceptibility in tetraploid rose germplasm and the first report of defoliation QTL in roses. A major QTL for cercospora susceptibility coincides with the black spot resistance QTL on LG 5 (Rdr4). A major cercospora resistance QTL was found on LG 1. These populations provide a genetic resource that will further the knowledge base of rose genetics as more traits are studied. Studying more traits from these populations will allow for the stacking of various QTLs for desirable traits.
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Affiliation(s)
- Jeekin Lau
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
| | | | | | | | | | | | - Oscar Riera-Lizarazu
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
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Nozari Y, Park C, Brietzke E, Iacobucci M, Gill H, McIntyre RS. Correlation between improved leptin signaling and cognitive function post bariatric surgery. J Affect Disord 2023; 326:225-231. [PMID: 36736790 DOI: 10.1016/j.jad.2023.01.100] [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] [Received: 08/27/2021] [Revised: 01/23/2023] [Accepted: 01/27/2023] [Indexed: 02/04/2023]
Abstract
Determining whether changes in leptin signaling plays a role in the improvement of cognitive function post-bariatric surgery may aid in the understanding and development of novel therapeutic approaches targeting cognitive dysfunction through the greater understanding of processes connecting obesity and brain health. Several studies have explored the effects of cognition post bariatric surgery, and others have studied leptin and its changes post surgery. However the amalgamation of the effects of leptin signaling in relation to cognition post bariatric surgery have yet to be considered as key tools in the understanding of cognitive dysfunction in obese subjects with leptin resistance or insensitivity. This review serves to highlight the potential correlations, to further elucidate the effect of improved leptin signaling on cognition post bariatric surgery, and to propose a direct cause for the improvement of cognitive function via the amelioration of the leptin Janus kinase/Signal transducer and activator of transcription (JAK/STAT) signaling pathway as a result of the reversal of inflammatory processes involved in diseased individuals.
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Affiliation(s)
- Y Nozari
- Mood Disorders Psychopharmacology Unit, Toronto Western Hospital, Toronto, ON, Canada; University of Toronto HBSc, Toronto, ON, Canada.
| | - C Park
- Mood Disorders Psychopharmacology Unit, Toronto Western Hospital, Toronto, ON, Canada; University of Toronto MSc, Toronto, ON, Canada
| | - E Brietzke
- Department of Psychiatry, Queen's University School of Medicine, Kingston, ON, Canada; Centre for Neuroscience Studies (CNS), Queen's University, Kingston, ON, Canada
| | - M Iacobucci
- Mood Disorders Psychopharmacology Unit, Toronto Western Hospital, Toronto, ON, Canada; University of Toronto HBSc, Toronto, ON, Canada
| | - H Gill
- Mood Disorders Psychopharmacology Unit, Toronto Western Hospital, Toronto, ON, Canada; Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - R S McIntyre
- Mood Disorders Psychopharmacology Unit, Toronto Western Hospital, Toronto, ON, Canada; Department of Pharmacology, University of Toronto, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada
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4
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Joshi V, Shi A, Mishra AK, Gill H, DiPiazza J. Genetic dissection of nitrogen induced changes in the shoot and root biomass of spinach. Sci Rep 2022; 12:13751. [PMID: 35962022 PMCID: PMC9374745 DOI: 10.1038/s41598-022-18134-7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 08/05/2022] [Indexed: 11/30/2022] Open
Abstract
Efficient partitioning of above and below-ground biomass in response to nitrogen (N) is critical to the productivity of plants under sub-optimal conditions. It is particularly essential in vegetable crops like spinach with shallow root systems, a short growth cycle, and poor nitrogen use efficiency. In this study, we conducted a genome-wide association study (GWAS) to explore N-induced changes using spinach accessions with diverse genetic backgrounds. We evaluated phenotypic variations as percent changes in the shoot and root biomass in response to N using 201 spinach accessions grown in randomized complete blocks design in a soilless media under a controlled environment. A GWAS was performed for the percent changes in the shoot and root biomass in response to N in the 201 spinach accessions using 60,940 whole-genome resequencing generated SNPs. Three SNP markers, chr4_28292655, chr6_1531056, and chr6_37966006 on chromosomes 4 and 6, were significantly associated with %change in root weight, and two SNP markers, chr2_18480277 and chr4_47598760 on chromosomes 2 and 4, were significantly associated with % change shoot weight. The outcome of this study established a foundation for genetic studies needed to improve the partitioning of total biomass and provided a resource to identify molecular markers to enhance N uptake via marker-assisted selection or genomic selection in spinach breeding programs.
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Affiliation(s)
- Vijay Joshi
- Texas A&M AgriLife Research and Extension Center, Uvalde, TX, 78801, USA. .,Department of Horticultural Sciences, Texas A&M University, College Station, TX, 77843, USA.
| | - Ainong Shi
- Department of Horticulture, University of Arkansas, Fayetteville, AR, 72701, USA.
| | - Amit Kumar Mishra
- Texas A&M AgriLife Research and Extension Center, Uvalde, TX, 78801, USA.,Department of Botany, School of Life Sciences, Mizoram University, Aizawl, Mizoram, 796004, India
| | - Haramrit Gill
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - James DiPiazza
- Texas A&M AgriLife Research and Extension Center, Uvalde, TX, 78801, USA
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5
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Awika HO, Mishra AK, Gill H, DiPiazza J, Avila CA, Joshi V. Selection of nitrogen responsive root architectural traits in spinach using machine learning and genetic correlations. Sci Rep 2021; 11:9536. [PMID: 33953221 PMCID: PMC8100178 DOI: 10.1038/s41598-021-87870-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 12/22/2020] [Accepted: 04/06/2021] [Indexed: 02/06/2023] Open
Abstract
The efficient acquisition and transport of nutrients by plants largely depend on the root architecture. Due to the absence of complex microbial network interactions and soil heterogeneity in a restricted soilless medium, the architecture of roots is a function of genetics defined by the soilless matrix and exogenously supplied nutrients such as nitrogen (N). The knowledge of root trait combinations that offer the optimal nitrogen use efficiency (NUE) is far from being conclusive. The objective of this study was to define the root trait(s) that best predicts and correlates with vegetative biomass under differed N treatments. We used eight image-derived root architectural traits of 202 diverse spinach lines grown in two N concentrations (high N, HN, and low N, LN) in randomized complete blocks design. Supervised random forest (RF) machine learning augmented by ranger hyperparameter grid search was used to predict the variable importance of the root traits. We also determined the broad-sense heritability (H) and genetic (rg) and phenotypic (rp) correlations between root traits and the vegetative biomass (shoot weight, SWt). Each root trait was assigned a predicted importance rank based on the trait’s contribution to the cumulative reduction in the mean square error (MSE) in the RF tree regression models for SWt. The root traits were further prioritized for potential selection based on the rg and SWt correlated response (CR). The predicted importance of the eight root traits showed that the number of root tips (Tips) and root length (RLength) under HN and crossings (Xsings) and root average diameter (RAvdiam) under LN were the most relevant. SWt had a highly antagonistic rg (− 0.83) to RAvdiam, but a high predicted indirect selection efficiency (− 112.8%) with RAvdiam under LN; RAvdiam showed no significant rg or rp to SWt under HN. In limited N availability, we suggest that selecting against larger RAvdiam as a secondary trait might improve biomass and, hence, NUE with no apparent yield penalty under HN.
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Affiliation(s)
- Henry O Awika
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, 78596, USA
| | - Amit K Mishra
- Texas A&M AgriLife Research and Extension Center, Uvalde, TX, 78801, USA
| | - Haramrit Gill
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - James DiPiazza
- Texas A&M AgriLife Research and Extension Center, Uvalde, TX, 78801, USA
| | - Carlos A Avila
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, 78596, USA.,Department of Horticultural Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Vijay Joshi
- Texas A&M AgriLife Research and Extension Center, Uvalde, TX, 78801, USA. .,Department of Horticultural Sciences, Texas A&M University, College Station, TX, 77843, USA.
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Hanft-Robert S, Tabi K, Gill H, Endres A, Krausz R. Mental health mobile apps for patients: Psychiatrists’ concerns. Eur Psychiatry 2021. [PMCID: PMC9470954 DOI: 10.1192/j.eurpsy.2021.928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
IntroductionThe use of mobile apps aimed at supporting patients with a mental illness is rapidly increasing.ObjectivesThe presented results explore psychiatrists’ concerns about mobile apps for patients with a mental illness. These results are part of a larger study that examines psychiatrists’ attitudes regarding the use and development of mobile apps.MethodsIn the qualitative exploratory study, semi-structured interviews were conducted with 18 psychiatrists in Czech Republic, Austria, and Slovakia. Psychiatrists were recruited via snowball sampling. The interviews were digitally recorded, transcribed verbatim, translated into English, and content analyzed using deductive and inductive category development.ResultsThere were mixed feelings regarding mobile apps for patients with mental illness. While psychiatrists emphasized certain benefits (e.g. increasing patients’ treatment motivation and engagement), several concerns were also expressed, especially by psychiatrists who were generally unfamiliar with mobile apps. They feared being replaced; were afraid that patients would act as their own doctors, thereby damaging their health; stressed that mobile apps could not respond or be tailored to an individual the same way psychiatrists could tailor treatment to a patient.ConclusionsThe psychiatrists who were more likely to have concerns about mental health apps were those who were generally unfamiliar with the apps and/or thought the apps aim to replace, rather than support, face-to-face treatment. Thus, clinicians and patients should be familiarized with the use of such mobile apps and educated on how they could support the face-to-face treatment.
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Lanter P, Calnan D, Reyes-Zaragoza M, Gill H, John K, Root B. 4 Minor Traumatic Head Bleeds, Emergency Department Observation Versus Inpatient Admission: Shorter Stays, Less Expensive, No Increased Risk. Ann Emerg Med 2019. [DOI: 10.1016/j.annemergmed.2019.08.007] [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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8
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Gill H, Woo M, Andrews CN, Sawhney S. A57 ROLE OF DYNAMIC MRI DEFECOGRAPHY IN IDENTIFICATION OF PELVIC FLOOR DYSFUNCTION: A TERTIARY CENTRE EXPERIENCE. J Can Assoc Gastroenterol 2019. [DOI: 10.1093/jcag/gwz006.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- H Gill
- Body Imaging, University Of Calgary, Calgary, AB, Canada
| | - M Woo
- Body Imaging, University Of Calgary, Calgary, AB, Canada
| | - C N Andrews
- Gastroenterology, University of Calgary, Calgary, AB, Canada
| | - S Sawhney
- Body Imaging, University Of Calgary, Calgary, AB, Canada
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Dulal N, Shanks R, Chalmers D, Adhikari B, Gill H. Migration and performance of erucamide slip additive in high-density polyethylene bottle caps. J Appl Polym Sci 2018. [DOI: 10.1002/app.46822] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- N. Dulal
- School of Science, RMIT University, 124 La Trobe Street; Melbourne Victoria 3000 Australia
| | - R. Shanks
- School of Science, RMIT University, 124 La Trobe Street; Melbourne Victoria 3000 Australia
| | - D. Chalmers
- Coca-Cola Amatil, Roussell Rd; Eastern Creek New South Wales 2766 Australia
| | - B. Adhikari
- School of Science, RMIT University, Bundoora Campus; Melbourne Victoria 3083 Australia
| | - H. Gill
- School of Science, RMIT University, Bundoora Campus; Melbourne Victoria 3083 Australia
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Ekdahl C, Wigertz O, Shahsavar N, Gill H, Forsum U, Karlsson D. Extended Telemedical Consultation using Arden Syntax Based Decision Support, Hypertext and WWW Technique. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Abstract:There is an obvious need for geographic distribution of expert knowledge among several health care units without increasing the cost of on-site expertise in locations where health care is provided. This paper describes the design of a knowledge-based decision-support system for extended consultation in clinical medicine. The system is based on Arden Syntax for Medical Logic Modules and hypertext using World Wide Web technology. It provides advice and explanations regarding the given advice. The explanations are presented in a hypertext format allowing the user to browse related information and to verify the relevance of the given advice. The system is intended to be used in a closed local network. With special precautions regarding issues of safety and patient security, the system can be used over wider areas such as in rural medicine. A prototype has been developed in the field of clinical microbiology and infectious diseases regarding infective endocarditis.
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Abstract
AbstractIn this paper the design and implementation of a decision support system for diabetes care is examined from an ethical perspective. It is noted that the system creates potential for enhancing the realization of the principle of autonomy through improved information to patients and participation by patients. However, there is also potential for using the system in a way that is contrary to good health care. It may provide patients with information they are unable to interpret and handle, and it may be used by healthcare authorities for controlling their personnel in ways contrary to good quality working conditions. In order for a decision support system to function as a well-integrated element in ethically based health care, different ethical aspects have to be taken into account during the design of the system. The ethical aspects also constitute one perspective of a systematic re-evaluation and re-design process.
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12
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Drudi L, Ades M, Tat J, MacKenzie K, Afilalo J, Gill H. PREOPERATIVE EXERCISE REHABILITATION IN CARDIAC AND VASCULAR INTERVENTIONS. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.069] [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: 10/18/2022] Open
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13
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Alqahtani FF, Messina F, Kruger E, Gill H, Ellis M, Lang I, Broadley P, Offiah AC. Evaluation of a semi-automated software program for the identification of vertebral fractures in children. Clin Radiol 2017; 72:904.e11-904.e20. [PMID: 28506798 DOI: 10.1016/j.crad.2017.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/24/2017] [Accepted: 04/11/2017] [Indexed: 11/19/2022]
Abstract
AIM To assess observer reliability and diagnostic accuracy in children, of a semi-automated six-point technique developed for vertebral fracture (VF) diagnosis in adults, which records percentage loss of vertebral body height. MATERIALS AND METHODS Using a semi-automated software program, five observers independently assessed T4 to L4 from the lateral spine radiographs of 137 children and adolescents for VF. A previous consensus read by three paediatric radiologists using a simplified algorithm-based qualitative technique (i.e., no software involved) served as the reference standard. RESULTS Of a total of 1,781 vertebrae, 1,187 (67%) were adequately visualised according to three or more observers. Interobserver agreement in vertebral readability for each vertebral level for five observers ranged from 0.05 to 0.47 (95% CI: -0.19, 0.76). Intra-observer agreement using the intraclass correlation coefficient (ICC) ranged from 0.25 to 0.61. The overall sensitivity and specificity were 18% (95% CI: 14-22) and 97% (95% CI: 97-98), respectively. CONCLUSION In contrast to adults, the six-point technique assessing anterior, middle, and posterior vertebral height ratios is neither satisfactorily reliable nor sensitive for VF diagnosis in children. Training of the software on paediatric images is required in order to develop a paediatric standard that incorporates not only specific vertebral body height ratios but also the age-related physiological changes in vertebral shape that occur throughout childhood.
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Affiliation(s)
- F F Alqahtani
- Academic Unit of Child Health, University of Sheffield, Sheffield, UK; Department of Radiological Sciences, College of Applied Medical Sciences, Najran University, Najran, Saudi Arabia.
| | - F Messina
- School of Health and Related Research, University of Sheffield, Sheffield, UK
| | - E Kruger
- Radiology Department, Sheffield Children's NHS Foundation Trust, Sheffield, UK
| | - H Gill
- Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - M Ellis
- Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - I Lang
- Radiology Department, Sheffield Children's NHS Foundation Trust, Sheffield, UK
| | - P Broadley
- Radiology Department, Sheffield Children's NHS Foundation Trust, Sheffield, UK
| | - A C Offiah
- Academic Unit of Child Health, University of Sheffield, Sheffield, UK; Radiology Department, Sheffield Children's NHS Foundation Trust, Sheffield, UK
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14
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Somnay Y, Lubner S, Gill H, Matsumura JB, Chen H. The PARP inhibitor ABT-888 potentiates dacarbazine-induced cell death in carcinoids. Cancer Gene Ther 2016; 23:348-354. [PMID: 27632933 PMCID: PMC5083201 DOI: 10.1038/cgt.2016.39] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 07/16/2016] [Accepted: 08/12/2016] [Indexed: 02/07/2023]
Abstract
Monoagent DNA-alkylating chemotherapies like dacarbazine are among a paucity of medical treatments for advanced carcinoid tumors, but are limited by host toxicity and intrinsic chemoresistance through the base excision repair (BER) pathway via poly (ADP-ribose) polymerase (PARP). Hence, inhibitors of PARP may potentiate DNA-damaging agents by blocking BER and DNA restoration. We show that the PARP inhibitor ABT-888 (Veliparib) enhances the cytotoxic effects of dacarbazine in carcinoids. Two human carcinoid cell lines (BON and H727) treated with a combination of ABT-888 and dacarbazine resulted in synergistic growth inhibition signified by combination indices <1 on the Chou-Talalay scale. ABT-888 administered prior to varying dacarbazine doses promoted the suppression of neuroendocrine biomarkers of malignancy ASCL1 and CgA, shown by Western analysis. ATM phosphorylation and p21Waf1/Cip1 activation, indicative of DNA damage, were increased by ABT-888 when combined with dacarbazine treatment, suggesting BER pathway attenuation by ABT-888. PE Annexin V/7-AAD staining and sorting revealed a profound induction of apoptosis following combination treatment, which was further confirmed by increased PARP cleavage. These results demonstrate that ABT-888 synergizes dacarbazine treatment in carcinoids. Therefore, ABT-888 may help treat carcinoids unresponsive or refractory to mainstay therapies.
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Affiliation(s)
- Y Somnay
- Endocrine Surgery Research Laboratories, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - S Lubner
- Division of Hematology and Medical Oncology, Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - H Gill
- Endocrine Surgery Research Laboratories, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - J B Matsumura
- Endocrine Surgery Research Laboratories, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - H Chen
- Endocrine Surgery Research Laboratories, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Department of Surgery, University of Alabama- Birmingham, Birmingham, AL, USA
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Cher CY, Leung GMK, Au CH, Chan TL, Ma ESK, Sim JPY, Gill H, Lie AKW, Liang R, Wong KF, Siu LLP, Tsui CSP, So CC, Wong HWW, Yip SF, Lee HKK, Liu HSY, Lau JSM, Luk TH, Lau CK, Lin SY, Kwong YL, Leung AYH. Next-generation sequencing with a myeloid gene panel in core-binding factor AML showed KIT activation loop and TET2 mutations predictive of outcome. Blood Cancer J 2016; 6:e442. [PMID: 27391574 PMCID: PMC5030377 DOI: 10.1038/bcj.2016.51] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 05/02/2016] [Accepted: 05/16/2016] [Indexed: 12/21/2022] Open
Abstract
Clinical outcome and mutations of 96 core-binding factor acute myeloid leukemia (AML) patients 18–60 years old were examined. Complete remission (CR) after induction was 94.6%. There was no significant difference in CR, leukemia-free-survival (LFS) and overall survival (OS) between t(8;21) (N=67) and inv(16) patients (N=29). Univariate analysis showed hematopoietic stem cell transplantation at CR1 as the only clinical parameter associated with superior LFS. Next-generation sequencing based on a myeloid gene panel was performed in 72 patients. Mutations in genes involved in cell signaling were associated with inferior LFS and OS, whereas those in genes involved in DNA methylation were associated with inferior LFS. KIT activation loop (AL) mutations occurred in 25 patients, and were associated with inferior LFS (P=0.003) and OS (P=0.001). TET2 mutations occurred in 8 patients, and were associated with significantly shorter LFS (P=0.015) but not OS. Patients negative for KIT-AL and TET2 mutations (N=41) had significantly better LFS (P<0.001) and OS (P=0.012) than those positive for both or either mutation. Multivariate analysis showed that KIT-AL and TET2 mutations were associated with inferior LFS, whereas age ⩾40 years and marrow blast ⩾70% were associated with inferior OS. These observations provide new insights that may guide better treatment for this AML subtype.
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Affiliation(s)
- C Y Cher
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - G M K Leung
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - C H Au
- Department of Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, China
| | - T L Chan
- Department of Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, China
| | - E S K Ma
- Department of Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, China
| | - J P Y Sim
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - H Gill
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - A K W Lie
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - R Liang
- Department of Medicine, Hong Kong Sanatorium & Hospital, Hong Kong, China
| | - K F Wong
- Department of Pathology, Queen Elizabeth Hospital, Hong Kong, China
| | - L L P Siu
- Department of Pathology, Queen Elizabeth Hospital, Hong Kong, China
| | - C S P Tsui
- Department of Pathology, Queen Elizabeth Hospital, Hong Kong, China
| | - C C So
- Department of Pathology, Queen Elizabeth Hospital, Hong Kong, China
| | - H W W Wong
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - S F Yip
- Department of Medicine, Tuen Mun Hospital, Hong Kong, China
| | - H K K Lee
- Department of Medicine, Princess Margaret Hospital, Hong Kong, China
| | - H S Y Liu
- Department of Medicine, Pamela Youde Nethersole Eastern Hospital, Hong Kong, China
| | - J S M Lau
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, China
| | - T H Luk
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, China
| | - C K Lau
- Department of Medicine, Tseung Kwan O Hospital, Hong Kong, China
| | - S Y Lin
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, China
| | - Y L Kwong
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - A Y H Leung
- Division of Haematology, Department of Medicine, LKS Faculty of Medicine, University of Hong Kong, Hong Kong, China
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Gill H, Au WY, Cheung WW, Lee EY, Kwong YL. Oral arsenic trioxide-based regimen as salvage treatment for relapsed or refractory mantle cell lymphoma. Ann Oncol 2014; 25:1391-1397. [PMID: 24728036 DOI: 10.1093/annonc/mdu142] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 08/08/2023] Open
Abstract
BACKGROUND Mantle cell lymphoma (MCL) is aggressive, and relapsed/refractory disease has poor outcomes. PATIENTS AND METHODS Thirty-nine patients (men = 34, women = 5) at 64 (41-82) years of age with relapsed/refractory MCL, ineligible for high-dose chemotherapy and had received 2 (1-5) prior regimens, were treated with a continuous oral regimen, comprising oral arsenic trioxide (oral-As2O3), chlorambucil and ascorbic acid. RESULTS Overall response rate was 49% (complete response, CR = 28%; partial response, PR = 21%). Only grade 1/2 toxicities were observed (hematologic: 56%, hepatic: 8%). Response was maintained in 11 patients (CR = 8; PR = 3), after a median of 24 (2-108) months. Independent prognostic factors for response were increased lactate dehydrogenase (P = 0.04) and unfavorable MCL international prognostic index (P = 0.04). At a median follow-up of 21 (1-118) months, the median progression-free survival (PFS) was 16 months, and overall survival (OS) 38 months. Independent prognostic factors for PFS were female gender (P = 0.002), and Eastern Cooperative Oncology Group (ECOG) performance score of 2 (P = 0.009). Independent prognostic factors for OS were female gender (P < 0.001), ECOG performance score of 2 (P = 0.03), non-response (P < 0.001), and disease progression after initial response (P = 0.05). CONCLUSION An oral regimen of oral-As2O3, chlorambucil and ascorbic acid was active with minimal toxicity in relapsed/refractory MCL, achieving durable responses in ∼30% of cases.
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Affiliation(s)
- H Gill
- Department of Medicine, Queen Mary Hospital, Hong Kong
| | - W Y Au
- Blood-Med Clinic, Crawford House, Hong Kong
| | - W W Cheung
- Department of Medicine, Queen Mary Hospital, Hong Kong
| | - E Y Lee
- Department of Diagnostic Radiology, Queen Mary Hospital, Hong Kong, China
| | - Y L Kwong
- Department of Medicine, Queen Mary Hospital, Hong Kong.
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Harrop-Griffiths W, Cook T, Gill H, Hill D, Ingram M, Makris M, Malhotra S, Nicholls B, Popat M, Swales H, Wood P. Regional anaesthesia and patients with abnormalities of coagulation. Anaesthesia 2013; 68:966-72. [DOI: 10.1111/anae.12359] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2013] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - T. Cook
- Royal College of Anaesthetists
| | | | - D. Hill
- Obstetric Anaesthetists’ Association
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- Obstetric Anaesthetists’ Association
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Rizwan MM, Chhabra G, Mishra A, Kapadia S, Rai R, Gill H. A case of isolated cutaneous Rosai-Dorfman-Syndrome. Gulf J Oncolog 2013; 1:87-89. [PMID: 23996873] [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] [Accepted: 05/27/2013] [Indexed: 06/02/2023]
Abstract
UNLABELLED Rosai-Dorfman Syndrome (RDD) is a rare, benign, self-limiting disorder which is characterized by the non-malignant proliferation of distinctive histiocytic cell within lymphatic system. RDD has been described as a dynamic entity in the spectrum of histiocytosis with non-Langerhans cell histiocytosis at one end and Langerhans cell histiocytosis at the other. The exact etiology of this disease is uncertain despite widespread search for infectious or immunological reasons. We present a case of purely cutaneous Rosai-Dorfman Syndrome presenting as abdominal wall swelling. KEYWORDS Rosai-Dorfman Disease, Lymphoma.
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Affiliation(s)
- M M Rizwan
- Mian Muhammad Rizwan, Department of Internal Medicine, Prince George's Hospital, 3001 Hospital Drive, Cheverly, MD 20785; USA. , Tel. 001-240-330-0065, Fax: 001-301-618-2986
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Chan TSY, Hwang YY, Gill H, Cheung WWW, Tse E, Leung AYH, Chim CS, Lie AKW, Kwong YL. Antifungal drug usage in haematologic patients during a 4-year period in an Asian university teaching hospital. Intern Med J 2013; 43:541-6. [DOI: 10.1111/imj.12064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 12/01/2012] [Indexed: 11/28/2022]
Affiliation(s)
- T. S. Y. Chan
- Department of Medicine; Queen Mary Hospital; Hong Kong
| | - Y.-Y. Hwang
- Department of Medicine; Queen Mary Hospital; Hong Kong
| | - H. Gill
- Department of Medicine; Queen Mary Hospital; Hong Kong
| | | | - E. Tse
- Department of Medicine; Queen Mary Hospital; Hong Kong
| | | | - C.-S. Chim
- Department of Medicine; Queen Mary Hospital; Hong Kong
| | - A. K. W. Lie
- Department of Medicine; Queen Mary Hospital; Hong Kong
| | - Y.-L. Kwong
- Department of Medicine; Queen Mary Hospital; Hong Kong
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Gill H, Kwok H, To KKW, Ho PL, Mak HKF, Chim CS, Kwong YL. Positron emission tomography in the diagnosis of disseminated pyomyositis due to PVL-negative methicillin-resistant Staphylococcus aureus. QJM 2013; 106:485-6. [PMID: 22690009 DOI: 10.1093/qjmed/hcs088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H Gill
- Department of Medicine, Queen Mary Hospital, Hong Kong, China
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Donkor ON, Ravikumar M, Proudfoot O, Day SL, Apostolopoulos V, Paukovics G, Vasiljevic T, Nutt SL, Gill H. Cytokine profile and induction of T helper type 17 and regulatory T cells by human peripheral mononuclear cells after microbial exposure. Clin Exp Immunol 2012; 167:282-95. [PMID: 22236005 DOI: 10.1111/j.1365-2249.2011.04496.x] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The immunomodulatory effects of probiotics were assessed following exposure of normal peripheral blood mononuclear cells (PBMC), cord blood cells and the spleen-derived monocyte/macrophage cell line CRL-9850 to Lactobacillus acidophilus LAVRI-A1, Lb. rhamnosus GG, exopolysaccharides (EPS)-producing Streptococcus thermophilus St1275, Bifidobacteriun longum BL536, B. lactis B94 and Escherichia coli TG1 strains. The production of a panel of pro- and anti-inflammatory cytokines by PBMC following bacterial stimulation was measured, using live, heat-killed or mock gastrointestinal tract (GIT)-exposed bacteria, and results show that (i) all bacterial strains investigated induced significant secretion of pro- and anti-inflammatory cytokines from PBMC-derived monocytes/macrophages; and (ii) cytokine levels increased relative to the expansion of bacterial cell numbers over time for cells exposed to live cultures. Bifidobacteria and S. thermophilus stimulated significant concentrations of transforming growth factor (TGF)-β, an interleukin necessary for the differentiation of regulatory T cells (T(reg) )/T helper type 17 (Th17) cells and, as such, the study further examined the induction of Th17 and T(reg) cells after PBMC exposure to selected bacteria for 96 h. Data show a significant increase in the numbers of both cell types in the exposed populations, measured by cell surface marker expression and by cytokine production. Probiotics have been shown to induce cytokines from a range of immune cells following ingestion of these organisms. These studies suggest that probiotics' interaction with immune-competent cells produces a cytokine milieu, exerting immunomodulatory effects on local effector cells, as well as potently inducing differentiation of Th17 and T(reg) cells.
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Affiliation(s)
- O N Donkor
- School of Biomedical and Health Sciences, Victoria University, Werribee Campus, Werribee, Vic, Australia.
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Gill H, Ip AHW, Leung R, So JCC, Pang AWK, Tse E, Leung AYH, Lie AKW, Kwong YL. Indolent T-cell large granular lymphocyte leukaemia after haematopoietic SCT: a clinicopathologic and molecular analysis. Bone Marrow Transplant 2011; 47:952-6. [DOI: 10.1038/bmt.2011.212] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Walther S, Gill H, Hanberger H. Implementation of selective digestive decontamination in the intensive care unit: a word of caution. Acta Anaesthesiol Scand 2010; 54:526-7. [PMID: 20415952 DOI: 10.1111/j.1399-6576.2009.02198.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hanberger H, Gill H, Njimi H, Walther S, Vincent JL. Prevalence of infections among patients admitted to ICUs in Nordic countries and the Netherlands in comparison with Mediterranean countries: a report from the EPIC II study. Crit Care 2010. [PMCID: PMC2934089 DOI: 10.1186/cc8292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Vaidya M, Gill H, Vaidya S, Phelps S, Edmonds N. Not so FAST? Focused assessment with sonography for trauma in paediatrics. Arch Emerg Med 2009. [DOI: 10.1136/emj.2009.082081n] [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: 11/03/2022]
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26
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Simpson JM, Maxwell D, Rosenthal E, Gill H. Fetal ventricular tachycardia secondary to long QT syndrome treated with maternal intravenous magnesium: case report and review of the literature. Ultrasound Obstet Gynecol 2009; 34:475-480. [PMID: 19731233 DOI: 10.1002/uog.6433] [Citation(s) in RCA: 35] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Ventricular tachycardia is a very rare fetal arrhythmia accounting for fewer than 2% of fetal tachycardias. We describe a fetus presenting at 30 weeks' gestation with ventricular tachycardia at a rate of 220 beats per min and fetal hydrops. The tachycardia was unresponsive to flecainide but was controlled within 12 h by an intravenous infusion of magnesium to the mother. Despite rapid control of the arrhythmia the fetus developed severe periventricular leukomalacia before birth for which a poor neurological prognosis was given. The baby was delivered preterm at 32 weeks' gestation and died on the sixth day after birth. Long QT syndrome was identified postnatally on the electrocardiogram, and was confirmed by genetic testing which showed a mutation in the KCNH2 gene (p.T613M).
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Affiliation(s)
- J M Simpson
- Department of Congenital Heart Disease, Evelina Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK.
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Hanberger H, Gill H, Fransson G, Nilsson L, Turner P. Trend analysis of antibiotic resistance and minimum inhibitory concentration distribution from 1997 to 2007 among Pseudomonas aeruginosa, Escherichia coli and Klebsiella pneumoniae in European ICUs. Crit Care 2009. [PMCID: PMC4084188 DOI: 10.1186/cc7466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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28
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Shah T, Tse A, Gill H, Wong I, Sutcliffe A, Gringras P, Appleton R, Tuleu C. Administration of melatonin mixed with soft food and liquids for children with neurodevelopmental difficulties. Dev Med Child Neurol 2008; 50:845-9. [PMID: 18754762 DOI: 10.1111/j.1469-8749.2008.03092.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [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: 11/29/2022]
Abstract
It is sometimes necessary for the contents of medication capsules to be mixed with certain foods and drinks because children are not always able to swallow the capsules. The compatibility and short-term stability (6h) of melatonin capsules mixed in a variety of liquids and foodstuffs (water, orange juice, semi-skimmed milk, strawberry yogurt, and strawberry jam) were analyzed for degradation. Extraction of melatonin from these common administration vehicles and an analytical assay for the drug and its potential degradation products were developed and validated. The results showed good recovery of melatonin from low- and high-strength capsules for all administration vehicles (between 89% minimum and 111% maximum). The drug was found to be stable in the common liquids and foods tested for up to 6 hours at room temperature (no degradation peak); hence it is unlikely to compromise the results of the Use of Melatonin in Children with Neurodevelopmental Disorders and Impaired Sleep trial.
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Affiliation(s)
- T Shah
- Department of Pharmaceutics, The School of Pharmacy, University of London, London, UK
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Tuleu C, Allam J, Gill H, Yentis S. Short term stability of pH-adjusted lidocaine-adrenaline epidural solution used for emergency caesarean section. Int J Obstet Anesth 2008; 17:118-22. [DOI: 10.1016/j.ijoa.2007.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2007] [Accepted: 09/01/2007] [Indexed: 11/29/2022]
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Hanberger H, Burman LG, Cars O, Erlandsson M, Gill H, Nilsson LE, Nordlinder D, Walther SM. Low antibiotic resistance rates in Staphylococcus aureus, Escherichia coli and Klebsiella spp but not in Enterobacter spp and Pseudomonas aeruginosa: a prospective observational study in 14 Swedish ICUs over a 5-year period. Acta Anaesthesiol Scand 2007; 51:937-41. [PMID: 17635399 DOI: 10.1111/j.1399-6576.2007.01364.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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: 11/29/2022]
Abstract
BACKGROUND Intensive care units (ICUs) are hot zones for emergence and spread of antibiotic resistance because of frequent invasive procedures, antibiotic usage and transmission of bacteria. We report prospective data on antibiotic use and bacterial resistance from 14 academic and non-academic ICUs, participating in the ICU-STRAMA programme 1999-2003. METHODS The quantity of antibiotics delivered to each ICU was calculated as defined daily doses per 1,000 occupied bed days (DDD(1,000)). Specimens for culture were taken on clinical indications and only initial isolates were considered. Species-related breakpoints according to the Swedish Reference Group for Antibiotics were used. Antibiotic resistance was defined as the sum of intermediate and resistant strains. RESULTS Mean antibiotic use increased from 1,245 DDD(1,000) in 1999 to 1,510 DDD(1,000) in 2003 (P = 0.11 for trend). Of Staphylococcus aureus, 0-1.8% were methicillin resistant (MRSA). A presumptive extended spectrum beta-lactamase (ESBL) phenotype was found in <2.4% of Escherichia coli, based on cefotaxime susceptibility, except a peak in 2002 (4.6%). Cefotaxime resistance was found in 2.6-4.9% of Klebsiella spp. Rates of resistance among Enterobacter spp. to cefotaxime (20-33%) and among Pseudomonas aeruginosa to imipenem (22-33%) and ciprofloxacin (5-21%) showed no time trend. CONCLUSION MRSA and cefotaxime-resistant E. coli and Klebsiella spp strains were few despite high total antibiotic consumption. This may be the result of a slow introduction of resistant strains into the ICUs, and good infection control. The cause of imipenem and ciprofloxacin resistance in P. aeruginosa could reflect the increased consumption of these agents plus spread of resistant clones.
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Affiliation(s)
- H Hanberger
- Faculty of Health Sciences, Linköpings Universitet, and Swedish Institute for Infectious Disease Control, Stockholm, Sweden.
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Ahmed M, Prasad J, Gill H, Stevenson L, Gopal P. Impact of consumption of different levels of Bifidobacterium lactis HN019 on the intestinal microflora of elderly human subjects. J Nutr Health Aging 2007; 11:26-31. [PMID: 17315077] [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: 05/14/2023]
Abstract
BACKGROUND Age-related changes in the physiology and intestinal function of the elderly render them more susceptible to gut-related illnesses. Probiotic dietary supplementation has been shown to enhance the health indices in the elderly. OBJECTIVE To determine the effect of three different doses [5 x 109 CFU/day (high), 1.0 x 109 CFU/day (medium) and 6.5 x 107 CFU/day (low)] of Bifidobacterium lactis HN019 (DR10TM) on the intestinal flora of elderly human subjects and the dose response effect. DESIGN Randomised, double-blind and placebo-controlled human dietary intervention study consisting of four groups of 20 elderly (over 60 years old) volunteers. Each volunteer consumed 250 mL per day of reconstituted skim milk (RSM) which either did not contain any probiotic supplement (placebo group) or contained B. lactis HN019 at different levels (low, medium and high dose groups). The study comprised three stages: a 2-week pre-intervention (without any supplement), followed by 4 weeks of test feeding (dietary intervention) and then a 2-week washout period. RESULTS After dietary intervention, statistically significant increases in bifidobacteria, lactobacilli and enterococci were observed. At the end of the 4-week feeding period the mean number of bifidobacteria recorded in the placebo group were 9.31 +/- 0.01 log CFU/g of faeces. In the high, medium and low dose groups the bifidobacteria levels were significantly (p < 0.006) higher (9.88 +/- 0.1, 9.75 +/- 0.14 and 9.74 +/- 0.11 log CFU/g of faeces, respectively), when compared to the respective pre-intervention levels. There were no significant differences (p superior 0.05) between the responses of the different dose groups, indicating that even the lowest dose tested augmented the changes in bifidobacteria. Similar trends were observed for lactobacilli and enterococci. In contrast, the counts of enterobacteria were reduced in all the probiotic dose groups. CONCLUSION The present study showed that dietary supplementation with B. lactis HN019 significantly increased the number of resident bifidobacteria and reduced the enterobacteria counts. In addition, enterococci and lactobacilli were also increased. Based on this study and already published clinical evidence (4, 5, 8, 9) we conclude that, B. lactis HN019 is a suitable probiotic for elderly human subjects and even the lowest dose (6.5 x 107 CFU/day) tested is able to confer desired changes in the intestinal microflora.
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Affiliation(s)
- M Ahmed
- Institute of Food, Nutrition and Human Health, Massey University, Palmerston North, New Zealand
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Lindholm P, Karlsson L, Gill H, Wigertz O, Linnarsson D. Time components of circulatory transport from the lungs to a peripheral artery in humans. Eur J Appl Physiol 2006; 97:96-102. [PMID: 16485105 DOI: 10.1007/s00421-006-0144-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/09/2006] [Indexed: 10/25/2022]
Abstract
Blood gas changes occurring in the lung undergo delay and damping on their way to a peripheral artery sampling site. Knowledge of the time components of circulatory transfer is important for the understanding of respiratory control and cardiovascular reflexes in response to blood gas transients. Providing steady state with regard to VA/Q distribution, cardiac output and peripheral blood flow, the relationship between the time courses of small end-tidal and peripheral PO2 changes is determined by the transfer function of the interposed vascular segment. This transfer function, expressed as delay time TD and mean transit time (MTT), was measured in six well-trained subjects, allowing the calculation of arterial time-courses from end-tidal to the reverse. They were studied at rest and during four different dynamic leg exercise intensities in the supine posture. TD and MTT amounted to 15.8 +/- 1.7 (mean +/- SEM) and 18.3 +/- 2.1 s at rest and were shortened to 7.7 +/- 0.6 and 11.5 +/- 1.8 s during exercise at 170 W. The shortening of TD and MTT did not appear to be simply an inverse function of cardiac output, suggesting that the shortening occurs in the central circulatory segment but not in the arm segment.
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Affiliation(s)
- P Lindholm
- Department of Physiology and Pharmacology, Section of Environmental Physiology, Karolinska Institutet, 17177, Stockholm, Sweden
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Saeedi B, Tärnberg M, Gill H, Hällgren A, Jonasson J, Nilsson LE, Isaksson B, Kühn I, Hanberger H. Phene Plate (PhP) biochemical fingerprinting. A screening method for epidemiological typing of enterococcal isolates. APMIS 2006; 113:603-12. [PMID: 16218936 DOI: 10.1111/j.1600-0463.2005.apm_217.x] [Citation(s) in RCA: 9] [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: 11/29/2022]
Abstract
Pulsed-field gel electrophoresis (PFGE) is currently considered the gold standard for genotyping of enterococci. However, PFGE is both expensive and time-consuming. The purpose of this study was to investigate whether the PhP system can be used as a reliable clinical screening method for detection of genetically related isolates of enterococci. If so, it should be possible to minimize the number of isolates subjected to PFGE typing, which would save time and money. Ninety-nine clinical enterococcal isolates were analysed by PhP (similarity levels 0.90-0.975) and PFGE (similarity levels < or =3 and < or =6 bands) and all possible pairs of isolates were cross-classified as matched or mismatched. We found that the probability that a pair of isolates (A and B) belonging to the same type according to PhP also belong to the same cluster according to PFGE, i.e. p(A(PFGE)=B(PFGE) * A(PhP)=B(PhP)), and the probability that a pair of isolates of different types according to PhP also belong to different clusters according to PFGE, i.e. p(A(PFGE) not equalB(PFGE) * A(PhP) not equalB(PhP)), was relatively high for E. faecalis (0.86 and 0.96, respectively), but was lower for E. faecium (0.51 and 0.77, respectively). The concordance which shows the probability that PhP and PFGE agree on match or mismatch was 86%-93% for E. faecalis and 54%-66% for E. faecium, which indicates that the PhP method may be useful for epidemiological typing of E. faecalis in the current settings but not for E. faecium.
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Affiliation(s)
- B Saeedi
- Division of Clinical Microbiology, Department of Molecular and Clinical Medicine, Faculty of Health Sciences, Linköping, Sweden.
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Gray H, Zavatsky A, Cristofolini L, Gill H. Experimentally validated finite element model of a human tibia. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)85022-0] [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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Gill H, Majithia V. 159 SUCCESSFUL USE OF INFLIXIMAB IN THE TREATMENT OF REITER'S SYNDROME: A CASE REPORT. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.158] [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: 11/18/2022]
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Price AJ, Short A, Kellett C, Beard D, Gill H, Pandit H, Dodd CAF, Murray DW. Ten-year in vivo wear measurement of a fully congruent mobile bearing unicompartmental knee arthroplasty. ACTA ACUST UNITED AC 2005; 87:1493-7. [PMID: 16260665 DOI: 10.1302/0301-620x.87b11.16325] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.1] [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: 12/18/2022]
Abstract
Polyethylene particulate wear debris continues to be implicated in the aetiology of aseptic loosening following knee arthroplasty. The Oxford unicompartmental knee arthroplasty employs a spherical femoral component and a fully congruous meniscal bearing to increase contact area and theoretically reduce the potential for polyethylene wear. This study measures the in vivo ten-year linear wear of the device, using a roentgenstereophotogrammetric technique. In this in vivo study, seven medial Oxford unicompartmental prostheses, which had been implanted ten years previously were studied. Stereo pairs of radiographs were acquired for each patient and the films were analysed using a roentgen stereophotogrammetric analysis calibration and a computer-aided design model silhouette-fitting technique. Penetration of the femoral component into the original volume of the bearing was our estimate of linear wear. In addition, eight control patients were examined less than three weeks post-insertion of an Oxford prosthesis, where no wear would be expected. The control group showed no measured wear and suggested a system accuracy of 0.1 mm. At ten years, the mean linear wear rate was 0.02 mm/year. The results from this in vivo study confirm that the device has low ten-year linear wear in clinical practice. This may offer the device a survival advantage in the long term.
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Affiliation(s)
- A J Price
- Nuffield Orthopaedic Centre, Windmill Road, Headington, Oxford OX3 7LD, UK.
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King C, Patel D, McNeal J, Gill H, Brooks J, Presti J. Preoperative PSA Velocity Predicts for Relapse After Radical Prostatectomy. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.500] [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: 11/28/2022]
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Gill H, Williams TD, Bishop CA, Cheng KM, Elliott JE. Effects of azinphos-methyl on cholinergic responses and general health in zebra finches (Taeniopygia guttata) after previous treatment with p,p'-DDE. Arch Environ Contam Toxicol 2005; 48:118-126. [PMID: 15657813 DOI: 10.1007/s00244-004-0229-8] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Received: 11/02/2003] [Accepted: 07/15/2004] [Indexed: 05/24/2023]
Abstract
Although organochlorine (OC) pesticides were replaced with organophosphates (OPs) in the early 1970s, they continue to persist in orchard environments today. Extensive research has been conducted to determine the effects of currently used OPs on cholinesterase (ChE) activity; however, although OCs continue to be prevalent in areas of previous use, few studies have looked at the toxicity of a combination of residual OC compounds with currently used OP pesticides. The focus of our study was to determine the effects of azinphos-methyl (a common OP used in apple orchards today) on ChE activity and general health in zebra finches (Taeniopygia guttata) previously exposed to p,p'-DDE (a commonly detected metabolite of DDT). The main results of our study were as follows: (1) azinphos-methyl alone caused a dose-dependent inhibition of plasma and brain ChE activity; (2) p,p'-DDE in combination with azinphos-methyl did not change azinphos-methyl inhibition of ChE activity; and (3) there were suggestions of immunostimulation in birds dosed 1 year previously to p,p'-DDE and of anemia when p,p'-DDE was combined with azinphos-methyl; however, there was no dose-response for these parameters in birds subsequently dosed with p,p'-DDE.
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Affiliation(s)
- H Gill
- Agroecology Group, Faculty of Agricultural Sciences, University of British Columbia, 2357 Main Mall, Vancouver, British Columbia, V6T 1Z4, Canada
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Lee NJ, Rigby RJ, Gill H, Boyle JJ, Fossati-Jimack L, Morley BJ, Vyse TJ. Multiple loci are linked with anti-red blood cell antibody production in NZB mice -- comparison with other phenotypes implies complex modes of action. Clin Exp Immunol 2004; 138:39-46. [PMID: 15373903 PMCID: PMC1809186 DOI: 10.1111/j.1365-2249.2004.02560.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 10/26/2022] Open
Abstract
The New Zealand Black (NZB) mouse strain is a model of autoimmune haemolytic anaemia (AHA) and systemic lupus erythematosus (SLE), characterized by the production of anti-red blood cell (RBC) antibodies and anti-nuclear antibodies (ANA), respectively. A linkage analysis was carried out in an (NZB x BALB/c) F(2) cross in order to identify loci involved in the production of both anti-RBC IgM and IgG antibodies. These regions of linkage were compared with linkage data to ANA from the same cohort and other linkage analyses involving New Zealand mice. Four previously described NZB loci linked to anti-RBC antibodies were confirmed, and eight novel loci linked to this trait were also mapped: five of which were of NZB origin, and three derived from the non-autoimmune BALB/c background. A comparison between loci linked with anti-RBC antibodies and ANA demonstrated many that co-localize, suggesting the presence of genes that result in the general breaking of tolerance to self-antigen. Furthermore, the observation that some loci were associated only with the anti-RBC response suggests an antigen specific mechanism in addition to a general breaking of tolerance. A locus linked with anti-RBC antibodies and ANA on distal chromosome 7 in this cohort is orthologous to one on the q arm of human chromosome 11, a region linked to AHA and ANA in human SLE.
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MESH Headings
- Anemia, Hemolytic, Autoimmune/genetics
- Anemia, Hemolytic, Autoimmune/immunology
- Anemia, Hemolytic, Autoimmune/pathology
- Animals
- Antibodies, Antinuclear/genetics
- Antibodies, Antinuclear/immunology
- Antibody Formation/genetics
- Antibody Formation/immunology
- Chromosomes, Mammalian/genetics
- Chromosomes, Mammalian/immunology
- Erythrocytes/immunology
- Genetic Linkage/genetics
- Genetic Linkage/immunology
- Immunoglobulin G/blood
- Immunoglobulin M/blood
- Liver/immunology
- Liver/pathology
- Lupus Erythematosus, Systemic/genetics
- Lupus Erythematosus, Systemic/immunology
- Lupus Erythematosus, Systemic/pathology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred NZB
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Affiliation(s)
- N J Lee
- Rheumatology Section, The Eric Bywaters Centre, London, UK
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Shaughnessy DA, Nitsche H, Booth CH, Shuh DK, Waychunas GA, Wilson RE, Gill H, Cantrell KJ, Serne RJ. Molecular interfacial reactions between Pu(VI) and manganese oxide minerals manganite and hausmannite. Environ Sci Technol 2003; 37:3367-3374. [PMID: 12966983 DOI: 10.1021/es025989z] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The sorption of Pu(VI) onto manganite (MnOOH) and hausmannite (Mn3O4) was studied as a function of time, solution pH, and initial plutonium concentration. Kinetic experiments indicate that the surface complexation of plutonium occurs over the first 24 h of contact with the mineral surface. The sorption increases with pH beginning at pH 3 until it reaches a maximum value of 100% at pH 8 (0.0011-0.84 micromol of Pu/m2 of manganite and 0.98-1.2 micromol of Pu/m2 of hausmannite) and then decreases over the pH range from 8 to 10. The ratio of solid to solution was 10 mg/mL for manganite experiments and 4 mg/mL for hausmannite samples. Carbonate was not excluded from the experiments. The amount of plutonium removed from the solution by the minerals is determined by a combination of factors including the plutonium solution species, the surface charge of the mineral, and the mineral surface area. X-ray absorption fine structure taken at the Pu L(III) edge were compared to plutonium standard spectra and showed that Pu(VI) was reduced to Pu(IV) after contact with the minerals. Plutonium sorption to the mineral surface is consistent with an inner-sphere configuration, and no evidence of PuO2 precipitation is observed. The reduction and complexation of Pu(VI) by manganese minerals has direct implications on possible migration of Pu(VI) species in the environment.
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Affiliation(s)
- D A Shaughnessy
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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41
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Gill H, Cheadle JP, Maynard J, Fleming N, Whatley S, Cranston T, Thompson EM, Leonard H, Davis M, Christodoulou J, Skjeldal O, Hanefeld F, Kerr A, Tandy A, Ravine D, Clarke A. Mutation analysis in the MECP2 gene and genetic counselling for Rett syndrome. J Med Genet 2003; 40:380-4. [PMID: 12746405 PMCID: PMC1735465 DOI: 10.1136/jmg.40.5.380] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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42
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Walther SM, Erlandsson M, Burman LG, Cars O, Gill H, Hoffman M, Isaksson B, Kahlmeter G, Lindgren S, Nilsson L, Olsson-Liljequist B, Hanberger H. Antibiotic prescription practices, consumption and bacterial resistance in a cross section of Swedish intensive care units. Acta Anaesthesiol Scand 2002; 46:1075-81. [PMID: 12366501 DOI: 10.1034/j.1399-6576.2002.460904.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [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: 11/23/2022]
Abstract
BACKGROUND The purpose of this work was to study usage of antibiotics, its possible determinants, and patterns of bacterial resistance in Swedish intensive care units (ICUs). METHODS Prospectively collected data on species and antibiotic resistance of clinical isolates and antibiotic consumption specific to each ICU in 1999 were analyzed together with answers to a questionnaire. Antibiotic usage was measured as defined daily doses per 1000 occupied bed days (DDD1000). RESULTS Data were obtained for 38 ICUs providing services to a population of approximately 6 million. The median antibiotic consumption was 1257 DDD1000 (range 584-2415) and correlated with the length of stay but not with the illness severity score or the ICU category. Antibiotic consumption was higher in the ICUs lacking bedside devices for hand disinfection (2193 vs. 1214 DDD1000, p=0.05). In the ICUs with a specialist in infectious diseases responsible for antibiotic treatment the consumption pattern was different only for use of glycopeptides (58% lower usage than in other ICUs: 26 vs. 11 DDD1000,P=0.02). Only 21% of the ICUs had a written guideline on the use of antibiotics, 57% received information on antibiotic usage at least every 3 months and 22% received aggregated resistance data annually. Clinically significant antimicrobial resistance was found among Enterbacter spp. to cephalosporins and among Enterococcus spp. to ampicillin. CONCLUSIONS Availability of hand disinfection equipment at each bed and a specialist in infectious diseases responsible for antibiotic treatment were factors that correlated with lower antibiotic consumption in Swedish ICUs, whereas patient-related factors were not associated with antibiotic usage.
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Affiliation(s)
- S M Walther
- Departments of Cardiothoracic Anesthesia and Intensive Care, Clinical Microbiology and Hygiene and the Pharmacy at Universitetssjukhuset, Linköping, Sweden.
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Abstract
OBJECTIVES Sternal wound complications often have a late onset and are detected after patients are discharged from the hospital. In an effort to catch all sternal wound complications, different postdischarge surveillance methods have to be used. Together with this long-term follow-up an analysis of risk factors may help to identify patients at risk and can lead to more effective preventive and control measures. METHODS This retrospective study of 3008 adult patients who underwent consecutive cardiac surgery from January 1996 through September 1999 at Linköping University Hospital, Sweden, evaluated 42 potential risk factors by univariate analysis followed by backward stepwise multivariate logistic regression analysis. RESULTS Two-thirds of the 291 (9.7%) sternal wound complications that occurred were identified after discharge. Of the 291 patients, 47 (1.6%) had deep sternal infections, 50 (1.7%) had postoperative mediastinitis, and 194 (6.4%) had superficial sternal wound complications. Twenty-three variables were selected by univariate analysis (P<0.15) and included in a multivariate analysis where eight variables emerged as significant (P<0.05). Preoperative risk factors for deep sternal infections/mediastinitis were obesity, insulin-dependent diabetes, smoking, peripheral vascular disease, and high New York Heart Association score. An intraoperative risk factor was bilateral use of internal mammary arteries, and a postoperative risk factor was prolonged ventilator support. Risk factors for superficial sternal wound complications were obesity, and an age of <75 years. The 30 day mortality was 2.7% for patients without sternal wound complications and 2/291 (0.7%) for all patients with sternal wound complications, 0.5% for superficial sternal wound complications, and 1.0% for deep sternal infections/mediastinitis. The 1 year mortality rate was 4.8% for patients without sternal wound complications and 11/291 (3.8%) for patients with sternal wound complications, 2.1% for superficial sternal wound complications, and 7.2% for deep sternal infections/mediastinitis. CONCLUSIONS The risk factors found in this study have been detected and reported in previous studies. The predictive ability was stronger though for deep sternal infections/mediastinitis (those needing surgical revisions) than for superficial sternal wound complications. Earlier recognition of sternal wound complications and aggressive treatment have probably contributed to the relatively low mortality rate seen in this study.
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Affiliation(s)
- L Ridderstolpe
- Department of Biomedical Engineering/Medical Informatics, Linköping University, Linköping, Sweden
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Stuart WF, Gill H, Anderson G, Fisher M. The magnetic observatory system under test by the Institute of Geological Sciences (UK). ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3735/5/5/022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
STUDY DESIGN Qualitative, comprehensive literature review. OBJECTIVE To discuss and summarize the current peer-reviewed literature related to the management of patients with cervical radiculopathy. BACKGROUND Cervical radiculopathy is a lesion of the cervical spinal nerve root with a reported prevalence of 3.3 cases per 1000 people; peak annual incidence is 2.1 cases per 1000 and occurs in the fourth and fifth decades of life. Nerve root injury has the potential to produce significant functional limitations and disability. METHODS AND MEASURES A search of the MEDLINE, CINAHL, and Web of Science databases for the periods 1966, 1982, and 1996, respectively, to December 1999 was conducted using selected keywords and MeSH headings. The bibliography of all retrieved articles were searched and pertinent articles were obtained. The Cochrane Database of Systematic Reviews was also searched. Literature related to the diagnosis, prognosis, and treatment of cervical radiculopathy were thoroughly reviewed and summarized using a critical appraisal approach. RESULTS Although cervical radiculopathy remains largely a clinical diagnosis, the true diagnostic accuracy of the clinical examination for cervical radiculopathy is unknown. Imaging and electrophysiologic tests are capable of detecting clinically significant problems in many patients and each modality has inherent strengths and weaknesses; technical as well as practical factors affect the choice of procedure. The natural course of cervical radiculopathy appears to be generally favorable but no prognostic or risk factors have been firmly established and the efficacy of various nonoperative treatments for the condition is unknown. CONCLUSION A clear definition of terms and further research are required to establish definitive diagnostic criteria and effective treatment for the management of patients with cervical radiculopathy.
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Affiliation(s)
- R S Wainner
- Rehabilitation Science, School of Health and Rehabilitation Science, University of Pittsburgh, PA, USA.
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46
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Gill H, Wilson LK, Cheng KM, Trudeau S, Elliott JE. Effects of azinphos-methyl on American robins breeding in fruit orchards. Bull Environ Contam Toxicol 2000; 65:756-763. [PMID: 11080356 DOI: 10.1007/s0012800187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Affiliation(s)
- H Gill
- Canadian Wildlife Service, Environment Canada, RR 1, 5421 Robertson Road, Delta, British Columbia, V4K 3N2, Canada
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Abstract
Chylous ascites, a rare compliation following retroperitoneal lymph node dissection, has not been reported as a means of spread of testicular cancer. This report describes a unique path of spread of testicular cancer which also appears to spontaneously mature at the metastatic site.
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Affiliation(s)
- S K Angell
- Department of Urology, Stanford University Medical Center, Stanford, Calif. 94305, USA
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48
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Goodship J, Gill H, Carter J, Jackson A, Splitt M, Wright M. Autozygosity mapping of a seckel syndrome locus to chromosome 3q22. 1-q24. Am J Hum Genet 2000; 67:498-503. [PMID: 10889046 PMCID: PMC1287195 DOI: 10.1086/303023] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2000] [Accepted: 05/31/2000] [Indexed: 11/03/2022] Open
Abstract
Seckel syndrome (MIM 210600) is an autosomal recessive disorder of low birth weight, severe microcephaly, and dysmorphic facial appearance with receding forehead, prominent nose, and micrognathia. We have performed a genomic screen in two consanguineous families of Pakistani origin and found that the disorder segregates with markers between loci D3S1316 and D3S3710, which map to chromosome 3q22.1-q24. Analysis using HOMOZ/MAPMAKER gave a maximum LOD score of 8.72. All five affected individuals were homozygous for the same allele, for two adjacent polymorphic markers within the region segregating with the disease, narrowing the region to 12 cM.
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Affiliation(s)
- J Goodship
- Human Genetics Unit, School of Biochemistry and Genetics, Newcastle University, Newcastle-upon-Tyne, United Kingdom.
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Cheadle JP, Gill H, Fleming N, Maynard J, Kerr A, Leonard H, Krawczak M, Cooper DN, Lynch S, Thomas N, Hughes H, Hulten M, Ravine D, Sampson JR, Clarke A. Long-read sequence analysis of the MECP2 gene in Rett syndrome patients: correlation of disease severity with mutation type and location. Hum Mol Genet 2000; 9:1119-29. [PMID: 10767337 DOI: 10.1093/hmg/9.7.1119] [Citation(s) in RCA: 194] [Impact Index Per Article: 8.1] [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: 11/14/2022] Open
Abstract
Mutations in the methyl-CpG-binding protein gene MECP2 at Xq28 cause Rett syndrome (RTT), an X-linked dominant neurodevelopmental disorder characterized by a period of stagnation followed by regression in the development of young girls. Mutations were sought in MECP2 in 48 females with classical sporadic RTT, seven families with possible familial RTT and five sporadic females with features suggestive, but not diagnostic of RTT. Long distance PCR coupled with long-read direct sequencing was employed to sequence the entire MECP2 gene coding region in all cases. Mutations were identified in 44/55 (80%) unrelated classical sporadic and familial RTT patients, but only 1/5 (20%) sporadic cases with suggestive but non-diagnostic features of RTT. Twenty-one different mutations were identified (12 missense, four nonsense and five frame-shift mutations); 14 of these were novel. All missense mutations were located either in the methyl-CpG-binding domain or in the transcription repression domain. Nine recurrent mutations were characterized in a total of 33 unrelated cases (73% of all cases with MECP2 mutations). Significantly milder disease was noted in patients carrying missense mutations as compared with those with truncating mutations ( P = 0. 0023), and milder disease was associated with late as compared with early truncating mutations ( P = 0.0190).
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Affiliation(s)
- J P Cheadle
- Institute of Medical Genetics, University of Wales College of Medicine, Heath Park, Cardiff, CF14 4XN, UK
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Abstract
PURPOSE To assess the physical stability and aerosol characteristics of suspensions of hollow porous microspheres (PulmoSpheres) in HFA-134a. METHODS Cromolyn sodium, albuterol sulfate, and formoterol fumarate microspheres were prepared by a spray-drying method. Particle size and morphology were determined via electron microscopy. Particle aggregation and suspension creaming times were assessed visually, and aerosol performance was determined via Andersen cascade impaction and dose uniformity studies. RESULTS The hollow porous particle morphology allows the propellant to permeate freely within the particles creating a novel form of suspension termed a homodispersion, wherein the dispersed and continuous phases are identical, separated by an insoluble interfacial layer of drug and excipient. Homodispersion formation improves suspension stability by minimizing the difference in density between the particles and the medium, and by reducing attractive forces between particles. The improved physical stability leads to excellent dose uniformity. Excellent aerosolization efficiencies are also observed with PulmoSpheres formulations, with fine particle fractions of about 70%. CONCLUSIONS The formation of hollow porous particles provides a new formulation technology for stabilizing suspensions of drugs in hydrofluoroalkane propellants with improved physical stability, content uniformity, and aerosolization efficiency.
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Affiliation(s)
- L A Dellamary
- Alliance Pharmaceutical Corp., San Diego, California 92121, USA
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