76
|
Fahmi A, Abdullah S, Amin F, Ali A, Ahmed R, Shakeel M. Trapezoidal cubic hesitant fuzzy aggregation operators and their application in group decision-making. JOURNAL OF INTELLIGENT & FUZZY SYSTEMS 2019. [DOI: 10.3233/jifs-181703] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
77
|
Cagnazzo F, Ahmed R, Dargazanli C, Lefevre PH, Gascou G, Derraz I, Kalmanovich SA, Riquelme C, Bonafe A, Costalat V. Treatment of Wide-Neck Intracranial Aneurysms with the Woven EndoBridge Device Associated with Stenting: A Single-Center Experience. AJNR Am J Neuroradiol 2019; 40:820-826. [PMID: 30975649 DOI: 10.3174/ajnr.a6032] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/11/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The intrasaccular flow disruptor, the Woven EndoBridge device, is increasingly used for the treatment of wide-neck intracranial aneurysms. Due to unfavorable anatomy, additional stent placement is sometimes required to avoid Woven EndoBridge protrusion into bifurcation branches. We report our experience with the Woven EndoBridge associated with stent placement for the treatment of complex intracranial aneurysms. MATERIALS AND METHODS Patients with aneurysms treated with the Woven EndoBridge Single-Layer plus stent placement were evaluated retrospectively with prospectively maintained data. The technical feasibility, procedural complications, aneurysm occlusion, and clinical outcome were studied. RESULTS Seventeen patients and aneurysms treated with the Woven EndoBridge plus stent placement were included. The mean aneurysm size was 7 ± 3.1 mm. Aneurysm locations were the following: MCA (10 patients), anterior communicating artery (3 patients), basilar tip (3 patients), and posterior communicating artery (1 patient). Two lesions were ruptured and treated in the acute phase. The Woven EndoBridge and stent placement were successfully delivered in all cases. There were no permanent/major complications. Among the 2 patients with SAH, minor and completely reversible in-stent thrombosis occurred during treatment. An asymptomatic occlusion of the angular artery with a distal nonbifurcation aneurysm was discovered during the angiographic follow-up. Long-term (10.4 months) angiographic complete (Raymond-Roy I) and near-complete (Raymond-Roy II) occlusion was obtained in 11 (69%) and 2 (12.5%) aneurysms, respectively. The mean sizes of aneurysms showing Raymond-Roy I/Raymond-Roy II and Raymond-Roy III occlusion were 5.5 ± 2.1 mm and 10 ± 1 mm, respectively (P = .003). The mean fluoroscopy time was 35 ± 14 minutes. CONCLUSIONS Aneurysm embolization with the Woven EndoBridge device associated with stent placement appears technically feasible and effective for the treatment of lesions with unfavorable anatomy. In our study, this strategy was relatively safe with a low rate of relevant procedure-related adverse events.
Collapse
|
78
|
Smith S, Marley A, Ahmed R, Cooper S. Vitamin A deficiency-not just a developing country problem. Clin Nutr ESPEN 2018. [DOI: 10.1016/j.clnesp.2018.09.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
79
|
Choraria A, Agrawal S, Arun I, Chatterjee S, Ahmed R. Sentinel and Non-Sentinel Lymph Node Metastasis Prediction and Validation of the MSKCC Nomograms for Indian Breast Cancer Patients. J Glob Oncol 2018. [DOI: 10.1200/jgo.18.22900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Sentinel lymph node (SLN) biopsy accurately stages the axilla, but is time consuming and resource intensive. Nomograms and scoring systems have been developed, based on clinical and pathologic data available before surgery, to attempt to predict the likelihood of lymph node metastasis before surgery. As the management of the axilla in patients with low nodal burden changes, it is also important to predict whether there will be further axillary disease in patients with a positive SLN. Aim: To explore the risk factors for SLN and non-SLN metastasis in Indian women with breast cancer, by analysis of clinical and pathologic data. To assess the validity and clinical utility of two MSKCC nomograms that predicts axillary lymph node status for Western patients. Methods: Clinical data, and pathologic data available from core biopsy, for a consecutive series of women having SLNB was analyzed, and was plotted on two MSKCC nomograms. Univariate analysis was done by χ2 and Fischer exact tests and multivariate analysis was done by logistic regression method. A receiver-operating characteristic (ROC) curve was drawn and predictive accuracy was assessed by calculating the area under the ROC curve (AUC). Results: 34% (89 out of 256) of our patients had SLN positivity. When correlated with SLN metastasis by univariate analysis, LVI (χ2 = 80, P ≤ 0.001), PNI (χ2 = 13.36, P ≤ 0.001), ER+ (χ2 = 6.85, P = 0.009), PR+ (χ2 = 7.1, P = 0.008) and age ( P = 0.03) were significant. However, multivariate analysis showed that age (OR=1.04, P = 0.007) and LVI (OR=0.07, P ≤ 0.001) were identified as independent predictors for SLN metastasis. The area under the ROC curve was 0.772 and it fairly correlated with MSKCC nomogram. Patients with MSKCC scores lower than 38% had a frequency of SLN metastasis of 7.7% (5/65) and this cut-off could be used as a guide for not doing frozen section analysis in this subgroup. Further axillary dissection showed 41% (38 out of 92) had non-sentinel nodes positive. When correlated with non-SLN metastasis by univariate analysis, LVI (χ2 = 8.8, P = 0.003), PNI (χ2 = 6.85, P = 0.009), and extracapsular extension (χ2 = 4.18, P = 0.04) were significant. Number of SLN negative ( P = 0.01), SLN ratio (number of SLN positive/total number of SLN removed) ( P = 0.01) and size of SLN metastasis ( P = 0.002) were significant. However, multivariate analysis showed that only size of SLN metastasis (OR=0.845, P = 0.02) was identified as independent predictor for non-SLN metastasis. The area under the ROC curve was 0.66 and it poorly correlated with MSKCC nomogram. Conclusion: The MSKCC nomogram can provide a fairly accurate prediction of the probability of SLN metastasis, but is not for non-SLN metastasis. An institutional nomogram for non-SLN metastasis, including additional factors such as size of SLN metastasis, may improve prediction.
Collapse
|
80
|
Yang P, Silva R, Pedrigi R, Patel M, Chooi Y, Ahmed R, Naser J, Krams R. P34 FLUID-STRUCTURE INTERACTION MODELLING FOR ANALYSING ADVANCED CORONARY ATHEROSCLEROTIC PLAQUE FORMATION IN TRANSGENIC HYPERLIPIDAEMIC MINIPIGS. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy216.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
81
|
Ahmed R, Inam-Ul-Haq M, Shahzad U, Hyder S, Shahzaman S, Khan AUR, Aatif HM, Ahmad A, Gondal AS. First Report of Bacterial Canker Caused by Pseudomonas syringae pv. morsprunorum Race 1 on Peach from Khyber Pakhtunkhwa Province of Pakistan. PLANT DISEASE 2018; 102:PDIS10171618PDN. [PMID: 30086245 DOI: 10.1094/pdis-10-17-1618-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
|
82
|
Ahmed R, Dimopoulos K, Alonso R, Swan L, Li W, Gatzoulis M, Kempny A. 2380Survival prospects and surgical outcomes in 1792 patients with Ebstein's anomaly. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.2380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
83
|
Bashir A, Gray J, Bashir S, Ahmed R, Theodosiou E. Critical points in the pathway of antibiotic prescribing in a children's hospital: the Antibiotic Mapping of Prescribing (ABMAP) study. J Hosp Infect 2018; 101:461-466. [PMID: 30071268 DOI: 10.1016/j.jhin.2018.07.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 07/25/2018] [Indexed: 11/25/2022]
Abstract
BACKGROUND The World Health Organization has identified antimicrobial resistance (AMR) as one of the most significant global risks facing modern medicine. Interventions to improve antibiotic prescribing have so far had limited impact. AIM To understand the barriers to effective antibiotic prescribing. METHODS Mixed methodologies were used to investigate prescribing behaviours to identify the critical points in the antibiotic prescribing pathway for hospital inpatients. We assessed knowledge, experience or empowerment of prescribers, organizational factors, and use of the laboratory. Phase 1 was an online survey to map barriers and facilitators to antibiotic prescribing (56 participants). Phase 2 consisted of focus groups and interviews to gain more understanding of prescribing behaviours (10 participants). Phase 3 was an online survey to obtain opinions on possible solutions (22 participants). FINDINGS Barriers to prescribing were: laboratory factors 71.6%, resource issues 40%, time constraints 17.5%, pressure from others 52%. Ninety-three percent of prescribers were concerned about AMR. In three scenarios only 9% were confident not to prescribe antibiotics for a patient without bacterial infection; 53% would prescribe unnecessarily broad-spectrum antibiotics for pneumonia. Only 5% would de-escalate antibiotics in a microbiologically confirmed bacteraemia. Despite concerns about AMR, prescribers did not perceive that continuing antibiotics for individual patients might promote resistance. Prescribers were unwilling to change antibiotics out of hours and reported that they preferred professional support for antibiotic prescribing. CONCLUSION There was a marked disparity between prescribers, self-reporting of prescribing behaviour and responses to clinical scenarios. It was not clear whether training alone would change behaviours. Prescribers desired a directive mechanism to support antibiotic prescribing and stewardship.
Collapse
|
84
|
Siddiqui Z, Ahmed R, Aya H, Sorelli P. Improving compliance with the 62-day colorectal cancer pathway by reducing time between suspected cancer GP referrals and endoscopy. Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
85
|
Besney JD, Angel C, Pyne D, Martell R, Keenan L, Ahmed R. Addressing Women's Unmet Health Care Needs in a Canadian Remand Center: Catalyst for Improved Health? JOURNAL OF CORRECTIONAL HEALTH CARE 2018; 24:276-294. [PMID: 29925287 DOI: 10.1177/1078345818780731] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Incarcerated women have a disproportionate burden of infectious and chronic disease, substance disorders, and mental illness. This study explored incarcerated women's health and whether a Women's Health Clinic improved care within this vulnerable population. Retrospective chart reviews and focus groups were conducted. Poor access to care in the community due to competing social needs was described. Barriers to care during incarceration included lack of comprehensive gender-specific services, mistrust of providers, and fragmentation. Of 109 women, high rates of mental illness, partner violence, substance use, sexually transmitted infection (STI), and irregular Pap testing were observed. Pap (15% to 54%, p < .001) and STI (17% to 89%, p < .001) testing rates increased. Fragmentation of care remained at transition points, and further work is needed to improve continuity within corrections and the community.
Collapse
|
86
|
Titi N, van Niekerk A, Ahmed R. Child understandings of the causation of childhood burn injuries: Child activity, parental domestic demands, and impoverished settings. Child Care Health Dev 2018; 44:494-500. [PMID: 28718941 DOI: 10.1111/cch.12484] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/09/2017] [Accepted: 06/12/2017] [Indexed: 11/29/2022]
Abstract
BACKGROUND Burns are a global public health problem. In South Africa, the rate of paediatric burn deaths is 5 times higher than other upper middle-income countries, with concentrations in impoverished settings. Globally, the majority of research focuses on expert and caregiver descriptions of burn occurrence, causation, and prevention, with limited consideration of children's perspectives. This study investigated children's understanding of the causation and prevention of childhood burns. METHODS Data were collected from eighteen 10- to 11-year-old children living in selected impoverished, fire-affected neighbourhoods in Cape Town, through 3 isiXhosa focus groups. All focus groups were transcribed, coded, and analysed for emerging themes through thematic analysis. RESULTS Themes regarding burn causation and risks centred around 4 themes: (a) developmental limits in context; (b) domestic chores, child capacity, and inability to say "no"; (c) inadequate supervision and compromised caregiving; and (d) unsafe structures. Child accounts of prevention pertained to (e) burn injury prevention activities in comprised environments and emphasized child agency, and upgrading the physical environment. CONCLUSION The children in this study ascribed burn injuries as the consequence of their developmental limits in the context of poverty, constraints on parental supervision, and unsafe environments. The children recommended safety education and upgrading their physical environments as part of burns injury prevention. The child accounts offer useful insights to inform safety interventions in impoverished settings.
Collapse
|
87
|
Gates J, Denig A, Ahmed R, Mehta V, Kotlyar D. Low-enriched cermet-based fuel options for a nuclear thermal propulsion engine. NUCLEAR ENGINEERING AND DESIGN 2018. [DOI: 10.1016/j.nucengdes.2018.02.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
88
|
|
89
|
Umar ZA, Ahmed N, Ahmed R, Arshad M, Anwar-Ul-Haq M, Hussain T, Baig MA. Substrate temperature effects on the structural, compositional, and electrical properties of VO2
thin films deposited by pulsed laser deposition. SURF INTERFACE ANAL 2017. [DOI: 10.1002/sia.6368] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
90
|
Subramanian Y, Khan MN, Berger S, Foisy M, Singh A, Woods D, Pyne D, Ahmed R. HIV outcomes at a Canadian remand centre. Int J Prison Health 2017; 12:145-56. [PMID: 27548017 DOI: 10.1108/ijph-12-2015-0041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Purpose The purpose of this paper is to assess the impact of short-term incarceration on antiretroviral therapy (ART) adherence, virologic suppression, and engagement and retention in community care post-release. Design/methodology/approach A retrospective chart review of patients who attended the human immunodeficiency virus (HIV) Outreach Clinic at a Canadian remand center between September 2007 and December 2011 was carried out. Data extraction included CD4 lymphocyte count, HIV viral load, ART prescription refills, and community engagement and retention during and one-year pre- and post-incarceration. Findings Outpatient engagement increased by 23 percent ( p=0.01), as did ART adherence (55.2-70.7 percent, p=0.01), following incarceration. Retention into community care did not significantly improve following incarceration (22.4 percent pre-incarceration to 25.9 percent post-release, p=0.8). There was a trend toward improved virologic suppression (less than 40 copies/ml; 50-77.8 percent ( p=0.08)) during incarceration and 70. 4 percent sustained this one-year post-incarceration ( p=0.70). Originality/value The impact of short-term incarceration in a Canadian context of universal health coverage has not been previously reported and could have significant implications in optimizing HIV patient outcomes given the large number of HIV-positive patients cycling through short-term remand centers.
Collapse
|
91
|
Stephani C, Shoukier M, Ahmed R, Wolff-Menzler C. Polymorphism of the brain-derived neurotrophic factor and dynamics of the seizure threshold of electroconvulsive therapy. Eur Arch Psychiatry Clin Neurosci 2017; 267:787-794. [PMID: 27787610 DOI: 10.1007/s00406-016-0744-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 10/21/2016] [Indexed: 10/20/2022]
Abstract
During a course of electroconvulsive therapy (ECT), the level of currency necessary to induce an epileptic seizure in a patient may either remain relatively stable or-more often-may require repeated upward adjustment over time due to a constantly increasing seizure threshold. We aimed to determine whether a common polymorphism of the brain-derived neurotrophic factor (BDNF), which constitutes an important and ubiquitously expressed neurotrophine in the brain, affects the stimulation threshold of ECTs required to induce an epileptic seizure over time. Twenty-seven adult patients who underwent at least 12 consecutive ECT sessions were analyzed for the stimulation intensities required during the course of the stimulation as well as their BDNF gene status. We could not find a relation between the Val/Met polymorphism of the BDNF and the development of the seizure threshold during the course of the ECT sessions. Mechanisms and predispositions other than the BDNF polymorphism investigated in this study are responsible for the change in seizure thresholds over the course of ECT.
Collapse
|
92
|
Moreau D, Besney J, Jacobs A, Woods D, Joffe M, Ahmed R. Varicella zoster virus transmission in youth during incarceration. Int J Prison Health 2017; 12:106-14. [PMID: 27219908 DOI: 10.1108/ijph-11-2015-0038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Purpose - Facility-based Varicella zoster virus (VZV) transmission is reported in a Canadian youth offender correctional centre (YOCC). Transmission occurred from an immunocompetent youth offender (YO) with localized Herpes zoster to another immunocompetent single dose vaccinated YO, resulting in Varicella zoster (VZ) breakthrough disease. The purpose of this paper is to identify infection prevention and control (IPAC) measures utilized in this setting. Design/methodology/approach - A retrospective chart and immunization record review was conducted for two VZV cases and 27 exposed YO contacts in order to obtain demographic, clinical and immunization data. Descriptive data analysis was performed. Findings - All VZV cases and exposed contacts were male with an average age of 14.2 and 15.6 years for cases and contacts, respectively. Both cases shared the same living unit in the YOCC. There were 28 identified YO contacts, of whom 70 percent were single dose vaccinated with univalent vaccine, followed by 22 percent with a previous history of Varicella disease. All cases and contacts were born in Canada. No foreign-born populations were involved with this event. Infection control measures included additional precaution management, enhanced surveillance and environmental cleaning. As such, no hospitalizations or post-exposure immunizations were required. Originality/value - This report highlights the role that VZ breakthrough disease could play in fueling an outbreak in a high-risk environment without rapid recognition and implementation of preventative measures. It also underscores the importance of IPAC presence and public health immunization programs within correctional centers to avoid infectious disease threats.
Collapse
|
93
|
Pawar D, Ahmed R, Chaudhari S. A survey of on platinum ineligible in head and neck cancer patients in India. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx676.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
94
|
Chaudhry AR, Irfan A, Muhammad S, Al-Sehemi AG, Ahmed R, Jingping Z. Computational study of structural, optoelectronic and nonlinear optical properties of dynamic solid-state chalcone derivatives. J Mol Graph Model 2017. [DOI: 10.1016/j.jmgm.2017.05.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
95
|
Chowdhury NF, Paul SK, Aung MS, Hossain MA, Ahamed F, Ahmed S, Haque N, Nasreen SA, Khan SI, Rahman SMM, Rahman ASMM, Ferdouse F, Ahmed R, Sultan SM, Ahmed MU, Urushibara N, Kobayashi N. Nationwide prevalence of Rickettsia felis infections in patients with febrile illness in Bangladesh. New Microbes New Infect 2017; 19:123-125. [PMID: 28831298 PMCID: PMC5552056 DOI: 10.1016/j.nmni.2017.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/03/2017] [Accepted: 07/11/2017] [Indexed: 11/27/2022] Open
Abstract
From July 2015 to December 2016, the presence of rickettsial pathogens was investigated for 414 patients with unknown fever in eight places in all the divisions of Bangladesh. Rickettsia felis was identified in blood samples from all the regions (overall detection rate, 19.6%), suggesting nationwide prevalence of R. felis infections.
Collapse
|
96
|
Besney J, Moreau D, Jacobs A, Woods D, Pyne D, Joffe AM, Ahmed R. Influenza outbreak in a Canadian correctional facility. J Infect Prev 2017; 18:193-198. [PMID: 28989527 PMCID: PMC5496689 DOI: 10.1177/1757177416689725] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 12/14/2016] [Indexed: 11/16/2022] Open
Abstract
Correctional facilities face increased risk of communicable disease transmission and outbreaks. We describe the progression of an influenza outbreak in a Canadian remand facility and suggest strategies for preventing, identifying and responding to outbreaks in this setting. In total, six inmates had laboratory-confirmed influenza resulting in 144 exposed contacts. Control measures included enhanced isolation precautions, restricting admissions to affected living units, targeted vaccination and antiviral prophylaxis. This report highlights the importance of setting specific outbreak guidelines in addressing population and environmental challenges, as well as implementation of effective infection prevention and control (IPAC) and public health measures when managing influenza and other communicable disease outbreaks.
Collapse
|
97
|
Chatterjee S, Agrawal S, Nallathambi C, Ahmed R. Is the Current American Society of Clinical Oncology Guidance on Axillary Management Generalisable for Symptomatic or Unscreened Breast Cancers? Clin Oncol (R Coll Radiol) 2017; 29:e172-e173. [PMID: 28666763 DOI: 10.1016/j.clon.2017.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/25/2017] [Accepted: 06/07/2017] [Indexed: 10/19/2022]
|
98
|
Kumar S, Khaliq F, Singh S, Ahmed R, Kumar R, Deshmukh PS, Banerjee BD. Pulmonary Functions, Oxidative Stress and DNA Damage in Workers of a Copper Processing Industry. THE INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE 2017; 7:107-15. [PMID: 27112719 PMCID: PMC6816513 DOI: 10.15171/ijoem.2016.612] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 02/01/2016] [Indexed: 12/02/2022]
Abstract
Background: Occupational exposure to excessive level of copper results in many adverse health effects. Objective: To measure pulmonary function, oxidative stress, and extent of DNA damage in workers of a copper processing industry. Methods: 30 men working in a copper processing industry and 30 men matched for age and socioeconomic status (comparison group) were included in this study. Pulmonary function test parameters were measured for all participants. Serum malondialdehyde (MDA), ferric reducing ability of plasma (FRAP), glutathione (GSH) content in RBCs and 8-OHdG were assayed by ELISA. Extent of DNA damage in leucocytes was assayed by comet assay. Results: Pulmonary function parameters, FVC, FEV1, PEFR, and MVV measured in workers were significantly (p<0.05) lower than those observed in the comparison group. Compared to the comparison group, MDA was significantly (p=0.002) increased in studied workers; TAOC (p=0.017), and GSH (p=0.020) were significantly lower in workers than the comparison group. There was significant DNA damage in leucocytes in workers compared to the comparison group (difference in olive tail moment p<0.001). PEFR, FEF25-75%, and MEF50% were negatively correlated with MDA. Conclusion: The observed DNA damage would be due to increased oxidative stress resulting from excessive exposure to copper.
Collapse
|
99
|
Tewary S, Arun I, Ahmed R, Chatterjee S, Chakraborty C. AutoIHC-scoring: a machine learning framework for automated Allred scoring of molecular expression in ER- and PR-stained breast cancer tissue. J Microsc 2017; 268:172-185. [PMID: 28613390 DOI: 10.1111/jmi.12596] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 05/18/2017] [Accepted: 05/29/2017] [Indexed: 12/11/2022]
Abstract
In prognostic evaluation of breast cancer Immunohistochemical (IHC) markers namely, oestrogen receptor (ER) and progesterone receptor (PR) are widely used. The expert pathologist investigates qualitatively the stained tissue slide under microscope to provide the Allred score; which is clinically used for therapeutic decision making. Such qualitative judgment is time-consuming, tedious and more often suffers from interobserver variability. As a result, it leads to imprecise IHC score for ER and PR. To overcome this, there is an urgent need of developing a reliable and efficient IHC quantifier for high throughput decision making. In view of this, our study aims at developing an automated IHC profiler for quantitative assessment of ER and PR molecular expression from stained tissue images. We propose here to use CMYK colour space for positively and negatively stained cell extraction for proportion score. Also colour features are used for quantitative assessment of intensity scoring among the positively stained cells. Five different machine learning models namely artificial neural network, Naïve Bayes, K-nearest neighbours, decision tree and random forest are considered for learning the colour features using average red, green and blue pixel values of positively stained cell patches. Fifty cases of ER- and PR-stained tissues have been evaluated for validation with the expert pathologist's score. All five models perform adequately where random forest shows the best correlation with the expert's score (Pearson's correlation coefficient = 0.9192). In the proposed approach the average variation of diaminobenzidine (DAB) to nuclear area from the expert's score is found to be 7.58%, as compared to 27.83% for state-of-the-art ImmunoRatio software.
Collapse
|
100
|
Hasan A, Wobrock T, Guse B, Langguth B, Landgrebe M, Eichhammer P, Frank E, Cordes J, Wölwer W, Musso F, Winterer G, Gaebel W, Hajak G, Ohmann C, Verde PE, Rietschel M, Ahmed R, Honer WG, Dechent P, Malchow B, Castro MFU, Dwyer D, Cabral C, Kreuzer PM, Poeppl TB, Schneider-Axmann T, Falkai P, Koutsouleris N. Structural brain changes are associated with response of negative symptoms to prefrontal repetitive transcranial magnetic stimulation in patients with schizophrenia. Mol Psychiatry 2017; 22:857-864. [PMID: 27725655 DOI: 10.1038/mp.2016.161] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 07/06/2016] [Accepted: 08/04/2016] [Indexed: 12/13/2022]
Abstract
Impaired neural plasticity may be a core pathophysiological process underlying the symptomatology of schizophrenia. Plasticity-enhancing interventions, including repetitive transcranial magnetic stimulation (rTMS), may improve difficult-to-treat symptoms; however, efficacy in large clinical trials appears limited. The high variability of rTMS-related treatment response may be related to a comparably large variation in the ability to generate plastic neural changes. The aim of the present study was to determine whether negative symptom improvement in schizophrenia patients receiving rTMS to the left dorsolateral prefrontal cortex (DLPFC) was related to rTMS-related brain volume changes. A total of 73 schizophrenia patients with predominant negative symptoms were randomized to an active (n=34) or sham (n=39) 10-Hz rTMS intervention applied 5 days per week for 3 weeks to the left DLPFC. Local brain volume changes measured by deformation-based morphometry were correlated with changes in negative symptom severity using a repeated-measures analysis of covariance design. Volume gains in the left hippocampal, parahippocampal and precuneal cortices predicted negative symptom improvement in the active rTMS group (all r⩽-0.441, all P⩽0.009), but not the sham rTMS group (all r⩽0.211, all P⩾0.198). Further analyses comparing negative symptom responders (⩾20% improvement) and non-responders supported the primary analysis, again only in the active rTMS group (F(9, 207)=2.72, P=0.005, partial η 2=0.106). Heterogeneity in clinical response of negative symptoms in schizophrenia to prefrontal high-frequency rTMS may be related to variability in capacity for structural plasticity, particularly in the left hippocampal region and the precuneus.
Collapse
|