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Muñoz-Juan A, Benseny-Cases N, Guha S, Barba I, Caldwell KA, Caldwell GA, Agulló L, Yuste VJ, Laromaine A, Dalfó E. Caenorhabditis elegans RAC1/ced-10 mutants as a new animal model to study very early stages of Parkinson's disease. Prog Neurobiol 2024; 234:102572. [PMID: 38253120 DOI: 10.1016/j.pneurobio.2024.102572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/21/2023] [Accepted: 01/15/2024] [Indexed: 01/24/2024]
Abstract
Patients with Parkinson's disease (PD) display non-motor symptoms arising prior to the appearance of motor signs and before a clear diagnosis. Motor and non-motor symptoms correlate with progressive deposition of the protein alpha-synuclein (Asyn) both within and outside of the central nervous system, and its accumulation parallels neurodegeneration. The genome of Caenorhabditis elegans does not encode a homolog of Asyn, thus rendering this nematode an invaluable system with which to investigate PD-related mechanisms in the absence of interference from endogenous Asyn aggregation. CED-10 is the nematode homolog of human RAC1, a small GTPase needed to maintain the function and survival of dopaminergic neurons against human Asyn-induced toxicity in C. elegans. Here, we introduce C. elegans RAC1/ced-10 mutants as a predictive tool to investigate early PD symptoms before neurodegeneration occurs. Deep phenotyping of these animals reveals that, early in development, they displayed altered defecation cycles, GABAergic abnormalities and an increased oxidation index. Moreover, they exhibited altered lipid metabolism evidenced by the accumulation of lipid droplets. Lipidomic fingerprinting indicates that phosphatidylcholine and sphingomyelin, but not phosphatidylethanolamine or phosphatidylserine, were elevated in RAC1/ced-10 mutant nematodes. These collective characteristics reflect the non-motor dysfunction, GABAergic neurotransmission defects, upregulation of stress response mechanisms, and metabolic changes associated with early-onset PD. Thus, we put forward an easy-to-manipulate preclinical animal model to deepen our understanding of early-stage PD and accelerate the translational path for therapeutic target discovery.
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Affiliation(s)
- A Muñoz-Juan
- Group of Nanoparticles and Nanocomposites, Institut Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Barcelona, Spain
| | - N Benseny-Cases
- Biophysics Unit. Department of Biochemistry and Molecular Biology. Universitat Autònoma de Barcelona, Bellaterra 08193, Barcelona, Spain
| | - S Guha
- Nautilus Biotechnology, 835 Industrial Rd, San Carlos, CA 94070, USA
| | - I Barba
- Faculty of Medicine, University of Vic-Central University of Catalonia (UVic-UCC), Institute for Research and Innovation in Life Sciences and Health in Central Catalonia (IRIS-CC), Can Baumann, 08500 Vic, Spain
| | - K A Caldwell
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, USA; Department of Neurology, Center for Neurodegeneration and Experimental Therapeutics, and Nathan Shock Center of Excellence in the Basic Biology of Aging, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, AL 35294, USA
| | - G A Caldwell
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, USA; Department of Neurology, Center for Neurodegeneration and Experimental Therapeutics, and Nathan Shock Center of Excellence in the Basic Biology of Aging, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, AL 35294, USA
| | - L Agulló
- Faculty of Medicine, University of Vic-Central University of Catalonia (UVic-UCC), Institute for Research and Innovation in Life Sciences and Health in Central Catalonia (IRIS-CC), Can Baumann, 08500 Vic, Spain
| | - V J Yuste
- Department of Biochemistry and Molecular Biology, Institut de Neurociències, Faculty of Medicine, M2, Universitat Autònoma de Barcelona (UAB), Bellaterra Campus, Cerdanyola del Vallés, Barcelona, Spain
| | - A Laromaine
- Group of Nanoparticles and Nanocomposites, Institut Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Barcelona, Spain
| | - E Dalfó
- Faculty of Medicine, University of Vic-Central University of Catalonia (UVic-UCC), Institute for Research and Innovation in Life Sciences and Health in Central Catalonia (IRIS-CC), Can Baumann, 08500 Vic, Spain; Department of Biochemistry and Molecular Biology, Institut de Neurociències, Faculty of Medicine, M2, Universitat Autònoma de Barcelona (UAB), Bellaterra Campus, Cerdanyola del Vallés, Barcelona, Spain; Institute of Neurosciences, Faculty of Medicine, Universitat Autònoma de Barcelona (UAB), Campus UAB, 08193 Cerdanyola del Vallès, Spain.
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Kyriacou C, Ledger A, Bobdiwala S, Ayim F, Kirk E, Abughazza O, Guha S, Vathanan V, Gould D, Timmerman D, Van Calster B, Bourne T. Updating M6 pregnancy of unknown location risk-prediction model including evaluation of clinical factors. Ultrasound Obstet Gynecol 2024; 63:408-418. [PMID: 37842861 DOI: 10.1002/uog.27515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/19/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES Ectopic pregnancy (EP) is a major high-risk outcome following a pregnancy of unknown location (PUL) classification. Biochemical markers are used to triage PUL as high vs low risk to guide appropriate follow-up. The M6 model is currently the best risk-prediction model. We aimed to update the M6 model and evaluate whether performance can be improved by including clinical factors. METHODS This prospective cohort study recruited consecutive PUL between January 2015 and January 2017 at eight units (Phase 1), with two centers continuing recruitment between January 2017 and March 2021 (Phase 2). Serum samples were collected routinely and sent for β-human chorionic gonadotropin (β-hCG) and progesterone measurement. Clinical factors recorded were maternal age, pain score, bleeding score and history of EP. Based on transvaginal ultrasonography and/or biochemical confirmation during follow-up, PUL were classified subsequently as failed PUL (FPUL), intrauterine pregnancy (IUP) or EP (including persistent PUL (PPUL)). The M6 models with (M6P ) and without (M6NP ) progesterone were refitted and extended with clinical factors. Model validation was performed using internal-external cross-validation (IECV) (Phase 1) and temporal external validation (EV) (Phase 2). Missing values were handled using multiple imputation. RESULTS Overall, 5473 PUL were recruited over both phases. A total of 709 PUL were excluded because maternal age was < 16 years or initial β-hCG was ≤ 25 IU/L, leaving 4764 (87%) PUL for analysis (2894 in Phase 1 and 1870 in Phase 2). For the refitted M6P model, the area under the receiver-operating-characteristics curve (AUC) for EP/PPUL vs IUP/FPUL was 0.89 for IECV and 0.84-0.88 for EV, with respective sensitivities of 94% and 92-93%. For the refitted M6NP model, the AUCs were 0.85 for IECV and 0.82-0.86 for EV, with respective sensitivities of 92% and 93-94%. Calibration performance was good overall, but with heterogeneity between centers. Net Benefit confirmed clinical utility. The change in AUC when M6P was extended to include maternal age, bleeding score and history of EP was between -0.02 and 0.01, depending on center and phase. The corresponding change in AUC when M6NP was extended was between -0.01 and 0.03. At the 5% threshold to define high risk of EP/PPUL, extending M6P altered sensitivity by -0.02 to -0.01, specificity by 0.03 to 0.04 and Net Benefit by -0.005 to 0.006. Extending M6NP altered sensitivity by -0.03 to -0.01, specificity by 0.05 to 0.07 and Net Benefit by -0.005 to 0.006. CONCLUSIONS The updated M6 model offers accurate diagnostic performance, with excellent sensitivity for EP. Adding clinical factors to the model improved performance in some centers, especially when progesterone levels were not suitable or unavailable. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- C Kyriacou
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College London, London, UK
| | - A Ledger
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - S Bobdiwala
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College London, London, UK
| | - F Ayim
- Department of Gynaecology, Hillingdon Hospital NHS Trust, London, UK
| | - E Kirk
- Department of Gynaecology, Royal Free NHS Foundation Trust, London, UK
| | - O Abughazza
- Department of Gynaecology, Royal Surrey County Hospital, Guildford, UK
| | - S Guha
- Department of Gynaecology, Chelsea and Westminster NHS Trust, London, UK
| | - V Vathanan
- Department of Gynaecology, Wexham Park Hospital, London, UK
| | - D Gould
- Department of Gynaecology, St Mary's Hospital, London, UK
| | - D Timmerman
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
- Department of Gynecology, University Hospital Leuven, Leuven, Belgium
| | - B Van Calster
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
- Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands
| | - T Bourne
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College London, London, UK
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
- Department of Gynecology, University Hospital Leuven, Leuven, Belgium
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Giordano N, Guha S, Stewart B, Kjelstrup-Hansen J, Knaapila M. High-pressure structure and phase behaviour of naphthyl end-capped oligothiophene. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322091343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Yongue G, Mollier J, Reshmi S, Ibeto L, Ross C, Ayim F, Guha S. P–344 Clarifying tubo-ovarian abscess management: a risk score for predicting antibiotic failure. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
Can antibiotic treatment failure of tubo-ovarian abscesses (TOA) be predicted based on clinical features at the time of diagnosis?
Summary answer
We propose a risk score including patient temperature, c-reactive protein and TOA size that could predict which patients are likely to fail parental antibiotic treatment.
What is known already
Current guidance is that the first line management of non-ruptured TOA is with parental antibiotics. However, it is reported that treatment failure rate is 20–30%. Alternative treatment modalities include radiological drainage or laparoscopic/open surgery. In patients who require intervention, outcomes, such as morbidity, length of hospital stay and fertility, are improved when this is performed early rather than later in their hospital admission. However, our current guidance is scant with regards to the decision making for interventional TOA management.
Study design, size, duration
This is a multicentre retrospective cohort study over 81 months (01/01/13- 30/09/19) identifying 214 consecutive patients admitted to hospitals in North-West London with diagnosed TOA. Participants/materials, setting, methods: Demographics, medical history, presenting symptoms, laboratory results, radiological findings, treatments administered, hospital length of stay and follow up data was collected. The patients were chronologically split with the first 150 being used for the development of our risk score. Univariate and bivariate analyses were employed to ascertain statistically significant variables in the failure of parental antibiotic. The remaining 64 patients were used for risk score validation.
Main results and the role of chance
Statistically significant variables were: temperature at admission (median= 37.1 °C vs 38.2 °C, p = 0.0001), C-reactive protein (CRP) at admission (151mg/L vs 243mg/L, p = 0.0001) and size of TOA (6.0cm vs 8.0cm, p = 0.0001). Those requiring intervention, stayed in hospital twice as long as those who did not (4 days vs 8 days, p < 0.001). A scoring system was formulated using the statistically significant variables. A score of ≥ 4 was associated with requiring radiological/surgical intervention (p < 0.001), with sensitivity 69% and specificity 88% (AUC 0.859) when tested on the validation cohort.
Limitations, reasons for caution
Being a retrospective study, which puts the data at risk of information and selection bias. Although there are merits to a multi-centre study, variation in patient management will invariably cause data heterogeneity.
Wider implications of the findings: TOA patients may have their hospital management tailored early according to the postulated tool, alleviating uncertainty in their treatment as well as possibly reducing morbidity and length of hospital stay.
Trial registration number
Not applicable
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Affiliation(s)
- G Yongue
- Northwick Park Hospital, Obstetrics & Gynaecology, London, United Kingdom
| | - J Mollier
- Imperial College London, Medicine, London, United Kingdom
| | - S Reshmi
- Chelsea & Westminster Hospital NHS Foundation Trust, Obstetrics & Gynaecology, London, United Kingdom
| | - L Ibeto
- Chelsea & Westminster Hospital NHS Foundation Trust, Obstetrics & Gynaecology, London, United Kingdom
| | - C Ross
- Imperial College Healthcare NHS Trust, Obstetrics & Gynaecology, London, United Kingdom
| | - F Ayim
- The Hillingdon Hospitals NHS Foundation Trust, Obstetrics & Gynaecology, London, United Kingdom
| | - S Guha
- Chelsea & Westminster Hospital NHS Foundation Trust, Obstetrics & Gynaecology, London, United Kingdom
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Murray RT, Chandran AM, Battle RA, Runcorn TH, Schunemann PG, Zawilski KT, Guha S, Taylor JR. Seeded optical parametric generation in CdSiP 2 pumped by a Raman fiber amplifier at 1.24 µm. Opt Lett 2021; 46:2039-2042. [PMID: 33929413 DOI: 10.1364/ol.420959] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
We report a seeded optical parametric generator (OPG) producing tunable radiation from 4.2-4.6 µm. The seeded OPG employs a 13 mm long CdSiP2 (CSP) crystal cut for non-critical phase-matching, pumped by a nanosecond-pulsed, MHz repetition rate Raman fiber amplifier system at 1.24 µm. A filtered, continuous-wave fiber supercontinuum source at 1.72 µm is used as the seed. The source generates up to 0.25 W of mid-infrared (MIR) idler power with a total pump conversion of 42% (combined signal and idler).
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Prakash J, Chatterjee K, Guha S, Srivastava K, Chauhan VS. Adult attention-deficit Hyperactivity disorder: From clinical reality toward conceptual clarity. Ind Psychiatry J 2021; 30:23-28. [PMID: 34483520 PMCID: PMC8395556 DOI: 10.4103/ipj.ipj_7_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/25/2021] [Accepted: 03/29/2021] [Indexed: 11/07/2022] Open
Abstract
There is ambiguity about the clinical picture and concept of attention-deficit hyperactivity disorder (ADHD) in adults. Relevant literature was extracted from various search engines, analyzed, and interpreted. Available literature suggests a significant prevalence of ADHD in the adult population affecting the quality of socio-occupational functioning. Inattentiveness was more commonly present than hyperactivity-impulsivity. Frequent comorbidities with other psychiatric disorders like anxiety disorders and substance use disorders were noted. Pharmacological management and psychotherapy have been found effective in its management. ADHD is a disorder across the lifespan and fairly prevalent among adults. Greater awareness and more research are required for a better understanding of Adult ADHD and its effective management.
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Affiliation(s)
- Jyoti Prakash
- Department of Psychiatry, Armed Forces Medical College, Pune, Maharashtra, India
| | - K. Chatterjee
- Department of Psychiatry, Armed Forces Medical College, Pune, Maharashtra, India
| | - S. Guha
- Private Consultant Psychiatrist, Sr Lecturer UQ School of Medicine and Griffith University School of Medicine, Australia
| | - K. Srivastava
- Department of Clinical Psychologist, Armed Forces Medical College, Pune, Maharashtra, India
| | - V. S. Chauhan
- Department of Psychiatry, Armed Forces Medical College, Pune, Maharashtra, India
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Christodoulou E, Bobdiwala S, Kyriacou C, Farren J, Mitchell-Jones N, Ayim F, Chohan B, Abughazza O, Guruwadahyarhalli B, Al-Memar M, Guha S, Vathanan V, Gould D, Stalder C, Wynants L, Timmerman D, Bourne T, Van Calster B. External validation of models to predict the outcome of pregnancies of unknown location: a multicentre cohort study. BJOG 2020; 128:552-562. [PMID: 32931087 PMCID: PMC7821217 DOI: 10.1111/1471-0528.16497] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2020] [Indexed: 12/23/2022]
Abstract
Objective To validate externally five approaches to predict ectopic pregnancy (EP) in pregnancies of unknown location (PUL): the M6P and M6NP risk models, the two‐step triage strategy (2ST, which incorporates M6P), the M4 risk model, and beta human chorionic gonadotropin ratio cut‐offs (BhCG‐RC). Design Secondary analysis of a prospective cohort study. Setting Eight UK early pregnancy assessment units. Population Women presenting with a PUL and BhCG >25 IU/l. Methods Women were managed using the 2ST protocol: PUL were classified as low risk of EP if presenting progesterone ≤2 nmol/l; the remaining cases returned 2 days later for triage based on M6P. EP risk ≥5% was used to classify PUL as high risk. Missing values were imputed, and predictions for the five approaches were calculated post hoc. We meta‐analysed centre‐specific results. Main outcome measures Discrimination, calibration and clinical utility (decision curve analysis) for predicting EP. Results Of 2899 eligible women, the primary analysis excluded 297 (10%) women who were lost to follow up. The area under the ROC curve for EP was 0.89 (95% CI 0.86–0.91) for M6P, 0.88 (0.86–0.90) for 2ST, 0.86 (0.83–0.88) for M6NP and 0.82 (0.78–0.85) for M4. Sensitivities for EP were 96% (M6P), 94% (2ST), 92% (N6NP), 80% (M4) and 58% (BhCG‐RC); false‐positive rates were 35%, 33%, 39%, 24% and 13%. M6P and 2ST had the best clinical utility and good overall calibration, with modest variability between centres. Conclusions 2ST and M6P performed best for prediction and triage in PUL. Tweetable abstract The M6 model, as part of a two‐step triage strategy, is the best approach to characterise and triage PULs. The M6 model, as part of a two‐step triage strategy, is the best approach to characterise and triage PULs.
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Affiliation(s)
- E Christodoulou
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - S Bobdiwala
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - C Kyriacou
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | | | | | - F Ayim
- Hillingdon Hospital, London, UK
| | - B Chohan
- Wexham Park Hospital, Slough, UK
| | | | | | - M Al-Memar
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - S Guha
- Chelsea and Westminster NHS Trust, London, UK
| | | | - D Gould
- St Marys' Hospital, London, UK
| | - C Stalder
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - L Wynants
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Epidemiology, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| | - D Timmerman
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Obstetrics and Gynaecology, University Hospitals Leuven, Leuven, Belgium
| | - T Bourne
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK.,Department of Obstetrics and Gynaecology, University Hospitals Leuven, Leuven, Belgium
| | - B Van Calster
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Department of Biomedical Data Sciences, Leiden University Medical Centre, Leiden, The Netherlands.,EPI-Centre, KU Leuven, Leuven, Belgium
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Kaul U, Das MK, Agarwal R, Bali H, Bingi R, Chandra S, Chopra VK, Dalal J, Jadhav U, Jariwala P, Jena A, Gupta R, Kerkar P, Guha S, Kumar D, Mashru M, Mehta A, Mohan JC, Nair T, Prabhakar D, Ray R, Rajani R, Sathe S, Sinha N, Vijayaraghavan G. Consensus and development of document for management of stabilized acute decompensated heart failure with reduced ejection fraction in India. Indian Heart J 2020; 72:477-481. [PMID: 33357634 PMCID: PMC7772598 DOI: 10.1016/j.ihj.2020.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 08/08/2020] [Accepted: 09/10/2020] [Indexed: 12/11/2022] Open
Abstract
Aim Ensuring adherence to guideline-directed medical therapy (GDMT) is an effective strategy to reduce mortality and readmission rates for heart failure (HF). Use of a checklist is one of the best tools to ensure GDMT. The aim was to develop a consensus document with a robust checklist for stabilized acute decompensated HF patients with reduced ejection fraction. While there are multiple checklists available, an India-specific checklist that is easy to fill and validated by regional and national subject matter experts (SMEs) is required. Methodology A total of 25 Cardiology SMEs who consented to participate from India discussed data from literature, current evidence, international guidelines and practical experiences in two national and four regional meetings. Results Recommendations included HF management, treatment optimization, and patient education. The checklist should be filled at four time points- (a) transition from intensive care unit to ward, (b) at discharge, (c) 1st follow-up and (d) subsequent follow-up. The checklist is the responsibility of the consultant or the treating physician which can be delegated to a junior resident or a trained HF nurse. Conclusion This checklist will ensure GDMT, simplify transition of care and can be used by all doctors across India. Institutions, associations, and societies should recommend this checklist for adaptability in public and private hospital. Hospital administrations should roll out policy for adoption of checklist by ensuring patient files have the checklist at the time of discharge and encourage practice of filling it diligently during follow-up visits.
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Affiliation(s)
- U Kaul
- Dept of Cardiology, Batra Hospital and Research Centre, 1, Mehrauli Badarpur Rd, Tughlakabad Institutional Area, New Delhi, India.
| | - M K Das
- Dept of Cardiology, CMRI Hospitals, 7/2 Diamond Harbour Road, Kolkata, West Bengal, India
| | - R Agarwal
- Dept of Cardiology, Jaswant Rai Speciality Hospital, Opp Sports Stadium, Civil Line Mawana Road Meerut, Uttar Pradesh, India
| | - H Bali
- Paras Hospital, Plot No. 2, HSIIDC Tech Park, Near NADA Sahib Gurudwara, Panchkula, Haryana, India
| | - R Bingi
- Vasavi Hospital, 15, 1st Stage, Opp. to 15E Bus Stop, 70th Cross Rd, Kumaraswamy Layout, Bengaluru, Karnataka, India
| | - S Chandra
- Dept of Cardiology, Virinchi Hospital, Virinchi Circle, Rd Number 1, Shyam Rao Nagar, Banjara Hills, Hyderabad, Telangana, India
| | - V K Chopra
- Max Superspeciality Hospital, 1, 2, Press Enclave Marg, Saket Institutional Area, Saket, New Delhi, India
| | - J Dalal
- Dept of Cardiology, Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Rao Saheb, Achutrao Patwardhan Marg, Four Bungalows, Andheri West, Mumbai, Maharashtra, India
| | - U Jadhav
- MGM Hospital, Plot No.35, Atmashanti Society, Sector 3, Vashi, Navi Mumbai, Maharashtra, India
| | - P Jariwala
- Yashoda Hospital, Raj Bhavan Rd, Matha Nagar, Somajiguda, Hyderabad, Telangana, India
| | - A Jena
- Kalinga Institute of Medical Sciences, Kushabhadra Campus, KIIT Campus, 5, KIIT Road, Patia, Bhubaneswar, Odisha, India
| | - R Gupta
- Preventive Cardiology, RUHS Hospital, Kumbha Marg, Sector 11 Rd, Pratap Nagar, Jaipur, Rajasthan, India
| | - P Kerkar
- KEM Hospital, Acharya Donde Marg, Parel, Mumbai, Maharashtra, India; Asian Heart Institute, Bandra Kurla Complex, G/N, Bandra (E), Mumbai, Maharashtra, India
| | - S Guha
- Dept of Cardiology, Calcutta Medical College, 88, College St, Calcutta Medical College, College Square, Kolkata, West Bengal, India
| | - D Kumar
- MEDICA Superspeciality Hospital, 127, Eastern Metropolitan Bypass, Nitai Nagar, Mukundapur, Kolkata, West Bengal, India
| | - M Mashru
- Dept of Cardiology, Sir H N Reliance Foundation Hospital and Research Centre, Prarthana Samaj, Raja Rammohan Roy Rd, Charni Road East, Khetwadi, Girgaon, Mumbai, Maharashtra, India
| | - A Mehta
- Sir Ganga Ram Hospital and Research Centre, Sarhadi Gandhi Marg, Old Rajinder Nagar, Rajinder Nagar, New Delhi, Delhi, India
| | - J C Mohan
- Dept of Cardiology, Jaipur Golden Hospital, 2, Naharpur Village Rd, Institutional Area, Sector 3, Rohini, Delhi, India
| | - T Nair
- Dept of Cardiology, PRS Hospital, NH 47, Killipalam, Thiruvananthapuram, Kerala, India
| | - D Prabhakar
- Apollo First Med Hospital, Poonamallee High Rd, New Bupathy Nagar, Kilpauk, Chennai, Tamil Nadu, India
| | - R Ray
- AMRI Hospital, Block-A, Scheme-L11 P-4&5, Gariahat Rd, Dhakuria, Kolkata, West Bengal, India
| | - R Rajani
- P D Hinduja Hospital & Medical Research Centre, SVS Rd, Mahim West, Shivaji Park, Mumbai, Maharashtra, India
| | - S Sathe
- Deenanath Mangeshkar Hospital and Research Centre, Deenanath Mangeshkar Hospital Road, Near Mhatre Bridge, Erandwane, Pune, Maharashtra, India
| | - N Sinha
- Sahara India Medical Institute, Sahara India Medical Institute, Sahara Hospital Rd, Viraj Khand - 1, Viraj Khand, Gomti Nagar, Lucknow, Uttar Pradesh, India
| | - G Vijayaraghavan
- Kerala Institute of Medical Sciences, 1, Vinod Nagar Rd, Anayara, Thiruvananthapuram, Kerala, India
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Kerkar PG, Naik N, Alexander T, Bahl VK, Chakraborty RN, Chatterjee SS, Chopra HK, Dani SI, Deb PK, Goswami KC, Guha S, Gupta R, Gupta V, Hasija PK, Jayagopal PB, Justin Paul G, Kahali D, Katyal VK, Khanna NN, Mandal M, Mishra SS, Mohanan PP, Mullasari A, Mehta S, Pancholia AK, Ray S, Roy D, Shanmugasundarm S, Sharma S, Singh BP, Tewari S, Tyagi SK, Venugopal KN, Wander GS, Yadav R, Das MK. Cardiological Society of India: Document on acute MI care during COVID-19. Indian Heart J 2020; 72:70-74. [PMID: 32534693 PMCID: PMC7201231 DOI: 10.1016/j.ihj.2020.04.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 04/29/2020] [Indexed: 12/20/2022] Open
Abstract
The unprecedented and rapidly spreading Coronavirus Disease-19 (COVID-19) pandemic has challenged public health care systems globally. Based on worldwide experience, India has initiated a nationwide lockdown to prevent the exponential surge of cases. During COVID-19, management of cardiovascular emergencies like acute Myocardial Infarction (MI) may be compromised. Cardiological Society of India (CSI) has ventured in this moment of crisis to evolve a consensus document for care of acute MI. However, this care should be individualized, based on local expertise and governmental advisories.
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Affiliation(s)
- P G Kerkar
- Seth GS Medical College and KEM Hospital, Mumbai, Maharashtra, India
| | - N Naik
- All India Institute of Medical Sciences, New Delhi, India
| | - T Alexander
- Kovai Medical Center and Hospital, Coimbatore, Tamil Nadu, India
| | - V K Bahl
- All India Institute of Medical Sciences, New Delhi, India
| | - R N Chakraborty
- Medica Group of Superspeciality Hospitals, Kolkata, West Bengal, India
| | - S S Chatterjee
- Indira Gandhi Institute of Medical Sciences, Patna, Bihar, India
| | | | - S I Dani
- Apollo Hospital, Ahmedabad, Gujarat, India
| | - P K Deb
- Daffodil Hospital, Kolkata, West Bengal, India
| | - K C Goswami
- All India Institute of Medical Sciences, New Delhi, India
| | - S Guha
- Calcutta Medical College Hospital, Kolkata, West Bengal, India
| | - R Gupta
- JROP Healthcare, New Delhi, India
| | - V Gupta
- Kishori Ram Hospital & Diabetes Care Centre, India
| | - P K Hasija
- Armed Forces Medical College, Pune, Maharashtra, India
| | | | | | - D Kahali
- BM Birla Heart Research Center, Kolkata, West Bengal, India
| | - V K Katyal
- Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India
| | - N N Khanna
- Indraprastha Apollo Hospital, New Delhi, India
| | - M Mandal
- NRS Medical College and Hospital, Kolkata, West Bengal, India
| | - S S Mishra
- Hi-Tech Medical College and Hospital, Bhubaneshwar, Odisha, India
| | - P P Mohanan
- Westfort Hi-Tech Hospital, Thrissur, Kerala, India
| | - A Mullasari
- Madras Medical Mission Hospital, Chennai, Tamil Nadu, India
| | - S Mehta
- University of Miami, Florida, USA
| | | | - S Ray
- Vivekanand Institute of Medical Sciences, Kolkata, West Bengal, India
| | - D Roy
- Rabindranath Tagore International Institute of Medical Sciences, Kolkata, West Bengal, India
| | | | | | - B P Singh
- Indira Gandhi Institute of Medical Sciences, Patna, Bihar, India
| | - S Tewari
- Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | | | - K N Venugopal
- Pushpagiri Institute of Medical Sciences, Tiruvalla, Kerala, India
| | - G S Wander
- Dayanand Medical College, Ludhiana, Punjab, India
| | - R Yadav
- All India Institute of Medical Sciences, New Delhi, India
| | - M K Das
- C K Birla Group of Hospitals (BMB and CMRI), Kolkata, West Bengal, India.
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Harikrishnan S, Mohanan PP, Chopra VK, Ambuj R, Sanjay G, Bansal M, Chakraborty RN, Chandra S, Chattarjee SS, Chopra HK, Mathew C, Deb PK, Goyal A, Goswami KC, Gupta R, Guha S, Gupta V, Hasija PK, Wardhan H, Jabir A, Jayagopal PB, Kahali D, Katyal VK, Kerkar PG, Khanna NN, Majumder B, Mandal M, Meena CB, Naik N, Narain VK, Pathak LA, Ray S, Roy D, Routray SN, Sarma D, Shanmugasundaram S, Singh BP, Tyagi SK, Venugopal K, Wander GS, Yadav R, Das MK. Cardiological society of India position statement on COVID-19 and heart failure. Indian Heart J 2020; 72:75-81. [PMID: 32405088 PMCID: PMC7219407 DOI: 10.1016/j.ihj.2020.04.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 04/29/2020] [Indexed: 02/06/2023] Open
Affiliation(s)
- S Harikrishnan
- Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India.
| | | | | | | | - G Sanjay
- Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | | | | | | | | | | | | | - P K Deb
- Daffodil Hospitals, Kolkata, India
| | - A Goyal
- Bani Park Hospital, D-9, Kabir Marg, Bani Park, JAIPUR, 302016, Rajasthan, India
| | | | - R Gupta
- JROP Institute of Echocardiography, New Delhi, India
| | - S Guha
- Medical College, Kolkata, India
| | - V Gupta
- Kishori Ram Hospital & Diabetes Care Centre, Bhatinda, Punjab, India
| | - P K Hasija
- MH Chennai, Armed Forces Medical Services, India
| | - Harsh Wardhan
- Mahatma Gandhi Medical College and Hospital, Jaipur, India
| | | | | | - D Kahali
- C.K.Birla Group of Hospitals (BMB), Kolkata, India
| | | | | | - N N Khanna
- Indraprastha Apollo Hospitals, Sarita Vihar, New Delhi, India
| | - B Majumder
- R.G. Kar Medical College, Kolkata, India
| | - M Mandal
- NRS Medical College, Kolkata, India
| | - C B Meena
- SMS Medical College, Jaipur, Rajasthan, India
| | | | - V K Narain
- King George's Medical University, Lucknow, India
| | - L A Pathak
- Nanavati Superspeciality Hospital, Mumbai, India
| | - S Ray
- Vivekananda Institute of Medical Sciences, Kolkata, India
| | - D Roy
- Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, India
| | | | - D Sarma
- Jorhat Christian Medical Centre Hospital, Jorhat, Assam, India
| | | | | | - S K Tyagi
- GB Pant Institute of Post Graduate Medical Education and Research, New Delhi, India
| | | | | | | | - M K Das
- C.K. Birla Group of Hospitals (BMB/CMRI), Kolkata, India
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11
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Bobdiwala S, Christodoulou E, Farren J, Mitchell-Jones N, Kyriacou C, Al-Memar M, Ayim F, Chohan B, Kirk E, Abughazza O, Guruwadahyarhalli B, Guha S, Vathanan V, Bottomley C, Gould D, Stalder C, Timmerman D, van Calster B, Bourne T. Triaging women with pregnancy of unknown location using two-step protocol including M6 model: clinical implementation study. Ultrasound Obstet Gynecol 2020; 55:105-114. [PMID: 31385381 DOI: 10.1002/uog.20420] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 07/19/2019] [Accepted: 07/26/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE The M6 risk-prediction model was published as part of a two-step protocol using an initial progesterone level of ≤ 2 nmol/L to identify probable failing pregnancies (Step 1) followed by the M6 model (Step 2). The M6 model has been shown to have good triage performance for stratifying women with a pregnancy of unknown location (PUL) as being at low or high risk of harboring an ectopic pregnancy (EP). This study validated the triage performance of the two-step protocol in clinical practice by evaluating the number of protocol-related adverse events and how effectively patients were triaged. METHODS This was a prospective multicenter interventional study of 3272 women with a PUL, carried out between January 2015 and January 2017 in four district general hospitals and four university teaching hospitals in the UK. The final pregnancy outcome was defined as: a failed PUL (FPUL), an intrauterine pregnancy (IUP) or an EP (including persistent PUL (PPUL)). FPUL and IUP were grouped as low-risk and EP/PPUL as high-risk PUL. Serum progesterone and human chorionic gonadotropin (hCG) levels were measured at presentation in all patients. If the initial progesterone level was ≤ 2 nmol/L, patients were discharged and were asked to have a follow-up urine pregnancy test in 2 weeks to confirm a negative result. If the progesterone level was > 2 nmol/L or a measurement had not been taken, hCG level was measured again at 48 h and results were entered into the M6 model. Patients were managed according to the outcome predicted by the protocol. Those classified as 'low risk, probable FPUL' were advised to perform a urine pregnancy test in 2 weeks and those classified as 'low risk, probable IUP' were invited for a scan a week later. When a woman with a PUL was classified as high risk (i.e. risk of EP ≥ 5%) she was reviewed clinically within 48 h. One center used a progesterone cut-off of ≤ 10 nmol/L and its data were analyzed separately. If the recommended management protocol was not adhered to, this was recorded as a protocol deviation and classified as: unscheduled visit for clinician reason, unscheduled visit for patient reason or incorrect timing of blood test or ultrasound scan. The classifications outlined in the UK Good Clinical Practice (GCP) guidelines were used to evaluate the incidence of adverse events. Data were analyzed using descriptive statistics. RESULTS Of the 3272 women with a PUL, 2625 were included in the final analysis (317 met the exclusion criteria or were lost to follow-up, while 330 were evaluated using a progesterone cut-off of ≤ 10 nmol/L). Initial progesterone results were available for 2392 (91.1%) patients. In Step 1, 407 (15.5%) patients were classified as low risk (progesterone ≤ 2 nmol/L), of whom seven (1.7%) were ultimately diagnosed with an EP. In 279 of the remaining 2218 women with a PUL, the M6 model was not applied owing to protocol deviation or because the outcome was already known (usually on the basis of an ultrasound scan) before a second hCG reading was taken; of these patients, 30 were diagnosed with an EP. In Step 2, 1038 women with a PUL were classified as low risk, of whom eight (0.8%) had a final outcome of EP. Of 901 women classified as high risk at Step 2, 275 (30.5%) had an EP. Therefore, 275/320 (85.9%) EPs were correctly classified as high risk. Overall, 1445/2625 PUL (55.0%) were classified as low risk, of which 15 (1.0%) were EP. None of these cases resulted in a ruptured EP or significant clinical harm. Sixty-two women participating in the study had an adverse event, but no woman had a serious adverse event as defined in the UK GCP guidelines. CONCLUSIONS This study has shown that the two-step protocol incorporating the M6 model effectively triaged the majority of women with a PUL as being at low risk of an EP, minimizing the follow-up required for these patients after just two visits. There were few misclassified EPs and none of these women came to significant clinical harm or suffered a serious adverse clinical event. The two-step protocol incorporating the M6 model is an effective and clinically safe way of rationalizing the management of women with a PUL. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- S Bobdiwala
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
| | - E Christodoulou
- KU Leuven, Department of Development & Regeneration, Leuven, Belgium
| | | | | | - C Kyriacou
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
| | - M Al-Memar
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
| | - F Ayim
- Hillingdon Hospital, London, UK
| | - B Chohan
- Wexham Park Hospital, Slough, UK
| | - E Kirk
- Royal Free NHS Foundation Trust, London, UK
| | | | | | - S Guha
- Chelsea and Westminster NHS Foundation Trust, London, UK
| | | | - C Bottomley
- Chelsea and Westminster NHS Foundation Trust, London, UK
| | - D Gould
- St Marys' Hospital, London, UK
| | - C Stalder
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
| | - D Timmerman
- KU Leuven, Department of Development & Regeneration, Leuven, Belgium
- University Hospital Leuven, Leuven, Belgium
| | - B van Calster
- KU Leuven, Department of Development & Regeneration, Leuven, Belgium
- Leiden University Medical Centre, Leiden, The Netherlands
| | - T Bourne
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
- KU Leuven, Department of Development & Regeneration, Leuven, Belgium
- University Hospital Leuven, Leuven, Belgium
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12
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McMahon WA, Aleo VA, Schultz AM, Horter BL, Lindberg KG, Allen M, Anderson L, Barnes R, Bellow S, Bokina C, Boulter T, Caulkins L, Ceizyk M, Chavey C, Eastep Y, Gohil V, Guha S, Hall G, Hopkins K, Horter B, Kaufer A, Kaur D, Kim S, Kupski B, Lee J, Lester; T, Musch S, Silbernagel K, Sorce L, Steiner G, Sumpter R, Sutton J, Veach J. 3M™ Petrifilm™ Staph Express Count Plate Method for the Enumeration of Staphylococcus aureus in Selected Types of Meat, Seafood, and Poultry: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/86.5.947] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The 3M™ Petrifilm™ Staph Express Count plate method was compared with AOAC Official Method 975.55 for the enumeration of Staphylococcus aureus in selected foods. Four foods—cooked, diced chicken; cured ham; smoked salmon; and pepperoni—were analyzed for S. aureus by 12 collaborating laboratories. For each food tested, the collaborators received 8 blind test samples consisting of a control sample, a low inoculation level, a medium inoculation level, and a medium inoculation level with background flora, each in duplicate. The mean log10 counts for the methods were comparable for all 4 foods. The repeatability and reproducibility variances of the 24 h Petrifilm Staph Express Count plate method were similar to those of the 72 h standard method.
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Affiliation(s)
- Wendy A McMahon
- Silliker, Inc., Research Center, 160 Armory Dr, South Holland, IL 60473
| | - Victoria A Aleo
- Silliker, Inc., Research Center, 160 Armory Dr, South Holland, IL 60473
| | - Ann M Schultz
- Silliker, Inc., Research Center, 160 Armory Dr, South Holland, IL 60473
| | - Barbara L Horter
- 3M Microbiology, 3M Center, Bldg 260-6B-01, St. Paul, MN 55144-1000
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13
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Mazza AR, Miettinen A, Daykin AA, He X, Charlton TR, Conrad M, Guha S, Lu Q, Bian G, Conrad EH, Miceli PF. Revealing interfacial disorder at the growth-front of thick many-layer epitaxial graphene on SiC: a complementary neutron and X-ray scattering investigation. Nanoscale 2019; 11:14434-14445. [PMID: 31334737 DOI: 10.1039/c9nr03504d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Epitaxial graphene on SiC provides both an excellent source of high-quality graphene as well as an architecture to support its application. Although single-layer graphene on Si-face SiC has garnered extensive interest, many-layer graphene produced on C-face SiC could be significantly more robust for enabling applications. Little is known, however, about the structural properties related to the growth evolution at the buried interface for thick many-layer graphene. Using complementary X-ray scattering and neutron reflectivity as well as electron microscopy, we demonstrate that thick many-layer epitaxial graphene exhibits two vastly different length-scales of the buried interface roughness as a consequence of the Si sublimation that produces the graphene. Over long lateral length-scales the roughness is extremely large (hundreds of Å) and it varies proportionally to the number of graphene layers. In contrast, over much shorter lateral length-scales we observe an atomically abrupt interface with SiC terraces. Graphene near the buried interface exhibits a slightly expanded interlayer spacing (∼1%) and fluctuations of this spacing, indicating a tendency for disorder near the growth front. Nevertheless, Dirac cones are observed from the graphene while its domain size routinely reaches micron length-scales, indicating the persistence of high-quality graphene beginning just a short distance away from the buried interface. Discovering and reconciling the different length-scales of roughness by reflectivity was complicated by strong diffuse scattering and we provide a detailed discussion of how these difficulties were resolved. The insight from this analysis will be useful for other highly rough interfaces among broad classes of thin-film materials.
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Affiliation(s)
- A R Mazza
- Department of Physics and Astronomy, University of Missouri, Columbia, Missouri, USA.
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Manir KS, Basu S, Guha S, Goswami M, Gunasekaran G, Das S. PO-177 Different definitive Radiotherapy approaches in Indian elderly Head and Neck Cancer patients. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)30343-3] [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: 11/27/2022]
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15
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Roy B, Basu S, Guha S, Manir K, Ahmed M, Ray S, Gangopadhayay M. Feasibility of cytoreductive surgery and intraperitoneal chemotherapy for pseudomyxoma peritonei in a rural hospital in India. Eur J Surg Oncol 2019. [DOI: 10.1016/j.ejso.2018.10.488] [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: 10/27/2022] Open
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Roy S, Roy B, Gangopadhayay M, Basu S, Guha S, Manir K, Ahmed M, Biswas M. Open technique of intraperitoneal chemotherapy in advanced ovarian cancer- how feasible is it. Eur J Surg Oncol 2019. [DOI: 10.1016/j.ejso.2018.10.234] [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: 10/27/2022] Open
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Abstract
Tube leukocyte adherence-inhibition response to syngeneic mammary tumor antigens and alloantigens from Ehrlich ascites carcinoma and fibrosarcoma was studied in spontaneous mammary tumor-bearing C3H/Jax mice. The mice with limited tumor burden responded significantly to the mammary tumor antigen and the Ehrlich ascites carcinoma antigen. The reactivity disappeared with increased tumor load. Oscillatory responses in leukocyte adherence inhibition to the reactive antigens was observed with increasing tumor weight. There was no response to the alloantigen of fibrosarcoma.
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Mishra S, Mohan JC, Nair T, Chopra VK, Harikrishnan S, Guha S, Ramakrishnan S, Ray S, Sethi R, Samal UC, Sarat Chandra K, Hiremath MS, Banerjee AK, Kumar S, Das MK, Deb PK, Bahl VK. Management protocols for chronic heart failure in India. Indian Heart J 2018; 70:105-127. [PMID: 29455764 PMCID: PMC5903070 DOI: 10.1016/j.ihj.2017.11.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Heart failure is a common clinical syndrome and a global health priority. The burden of heart failure is increasing at an alarming rate worldwide as well as in India. Heart failure not only increases the risk of mortality, morbidity and worsens the patient's quality of life, but also puts a huge burden on the overall healthcare system. The management of heart failure has evolved over the years with the advent of new drugs and devices. This document has been developed with an objective to provide standard management guidance and simple heart failure algorithms to aid Indian clinicians in their daily practice. It would also inform the clinicians on the latest evidence in heart failure and provide guidance to recognize and diagnose chronic heart failure early and optimize management.
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Affiliation(s)
- S Mishra
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - J C Mohan
- Department of Cardiology, Fortis Hospital, Shalimar Bagh, New Delhi, 110088, India
| | - Tiny Nair
- Department of Cardiology, PRS Hospital, Thiruvananthapuram, 695002, India
| | - V K Chopra
- Department of Clinical and Preventive Cardiology, Medanta - The Medicity, Gurugram, Haryana, 122001, India
| | - S Harikrishnan
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695011, India
| | - S Guha
- Department of Cardiology, Medical College, Kolkata, 700073, India
| | - S Ramakrishnan
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - S Ray
- Department of Cardiology, Vivekananda Institute of Medical Sciences, Kolkata, 70026, India
| | - R Sethi
- Department of Cardiology, King George's Medical University, Ludhiana, Uttar Pradesh, 226003, India
| | - U C Samal
- Heart Failure Subspecialty, Cardiological Society of India, Kolkata, India
| | - K Sarat Chandra
- Department of Cardiology, Institute of Post Graduate Medical Education & Research and Memorial Hospital, Kolkata, 700020, India
| | - M S Hiremath
- Department of Cardiology, Ruby Hall Clinic, Pune, 411001, India
| | - A K Banerjee
- Department of Cardiology, Institute of Post Graduate Medical Education & Research and Memorial Hospital, Kolkata, 700020, India
| | - S Kumar
- Cardiological Society of India, Kolkata, India
| | - M K Das
- Cardiological Society of India, Kolkata, India
| | - P K Deb
- Cardiological Society of India, Kolkata, India
| | - V K Bahl
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi, 110029, India
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Murray RT, Runcorn TH, Guha S, Taylor JR. High average power parametric wavelength conversion at 3.31-3.48 m in MgO:PPLN. Opt Express 2017; 25:6421-6430. [PMID: 28380992 DOI: 10.1364/oe.25.006421] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present results of high average power mid-infrared (mid-IR) generation employing synchronized nanosecond pulsed ytterbium and erbium fiber amplifier systems using periodically poled lithium niobate. We generate greater than 6 W of mid-IR radiation tunable in wavelength between 3.31-3.48 μm, at power conversion efficiencies exceeding 75%, with near diffraction limited beam quality (M2 = 1.4). Numerical modeling is used to verify the experimental results in differing pump depletion regimes.
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Ayim F, Tapp S, Guha S, Ameye L, Al-Memar M, Sayasneh A, Bottomley C, Gould D, Stalder C, Timmerman D, Bourne T. Can risk factors, clinical history and symptoms be used to predict risk of ectopic pregnancy in women attending an early pregnancy assessment unit? Ultrasound Obstet Gynecol 2016; 48:656-662. [PMID: 27854390 DOI: 10.1002/uog.16007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 06/14/2016] [Accepted: 06/21/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To examine whether risk factors and symptoms may be used to predict the likelihood of ectopic pregnancy (EP) in women attending early pregnancy assessment units in the UK. METHODS This was an observational cohort study of pregnant women under 12 weeks' gestation who were recruited from three London university hospitals between August 2012 and April 2013. One hospital continued recruitment between January and June 2015. A standardized information sheet incorporating patient demographics, medical history and symptoms was completed by patients and confirmed by examining clinicians. The outcome measure was final pregnancy location. RESULTS There were 1320 eligible patients included in the analysis, with a total of 72 EPs (rate of 6%). Pelvic pain and diarrhea > three times in the previous 24 h were independent symptoms that increased the risk of EP, with relative risks of 2.4 (95% CI, 1.4-4.0; P = 0.002) and 2.2 (95% CI, 1.08-4.5; P = 0.03), respectively. The only other independent marker of risk of EP was duration of vaginal bleeding; the risk of EP increased by 20% (95% CI, 14%-27%) for every 1-day increment in duration (P < 0.001). A logistic regression model incorporating these factors demonstrated an area under the receiver-operating characteristics curve of 0.73 (95% CI, 0.67-0.79). The prevalence of EP was low when there was no pelvic pain, no diarrhea and the duration of bleeding was ≤ 3 days, with an EP rate of 2% (6/391). In the presence of a single risk factor, the EP rate increased to 5% (29/631) when only pelvic pain was present, 8% (1/12) when only diarrhea > three times in the previous 24 h was reported and 9% (9/103) when there was only vaginal bleeding with a duration > 3 days. Women with pelvic pain and vaginal bleeding of any severity for > 3 days had a high EP rate of 16% (23/146). In the nine women who also reported diarrhea > three times in the previous 24 h, two had EP. CONCLUSIONS Only the presence of pelvic pain, diarrhea > three times in the previous 24 h and duration of bleeding were symptoms that significantly increased the risk for EP in women attending early pregnancy assessment units. Risk factors and symptoms alone could not be used to predict reliably an EP. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- F Ayim
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK
| | - S Tapp
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK
| | - S Guha
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK
| | - L Ameye
- Department of Development and Regeneration, Campus Gasthuisberg, KU Leuven, Leuven, Belgium
| | - M Al-Memar
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK
| | - A Sayasneh
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK
| | - C Bottomley
- Chelsea and Westminster Hospital, London, UK
| | - D Gould
- St Mary's Hospital, Imperial College, London, UK
| | - C Stalder
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK
| | - D Timmerman
- Department of Development and Regeneration, Campus Gasthuisberg, KU Leuven, Leuven, Belgium
| | - T Bourne
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's and Chelsea Hospital, Imperial College, London, UK
- Department of Development and Regeneration, Campus Gasthuisberg, KU Leuven, Leuven, Belgium
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Van Calster B, Bobdiwala S, Guha S, Van Hoorde K, Al-Memar M, Harvey R, Farren J, Kirk E, Condous G, Sur S, Stalder C, Timmerman D, Bourne T. Managing pregnancy of unknown location based on initial serum progesterone and serial serum hCG levels: development and validation of a two-step triage protocol. Ultrasound Obstet Gynecol 2016; 48:642-649. [PMID: 26776599 DOI: 10.1002/uog.15864] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 01/08/2016] [Accepted: 01/11/2016] [Indexed: 06/05/2023]
Abstract
OBJECTIVES A uniform rationalized management protocol for pregnancies of unknown location (PUL) is lacking. We developed a two-step triage protocol to select PUL at high risk of ectopic pregnancy (EP), based on serum progesterone level at presentation (step 1) and the serum human chorionic gonadotropin (hCG) ratio, defined as the ratio of hCG at 48 h to hCG at presentation (step 2). METHODS This was a cohort study of 2753 PUL (301 EP), involving a secondary analysis of prospectively and consecutively collected PUL data from two London-based university teaching hospitals. Using a chronological split we used 1449 PUL for development and 1304 for validation. We aimed to assign PUL as low risk with high confidence (high negative predictive value (NPV)) while classifying most EP as high risk (high sensitivity). The first triage step assigned PUL as low risk using a threshold of serum progesterone at presentation. The remaining PUL were triaged using a novel logistic regression risk model based on hCG ratio and initial serum progesterone (second step), defining low risk as an estimated EP risk of < 5%. RESULTS On validation, initial serum progesterone ≤ 2 nmol/L (step 1) classified 16.1% PUL as low risk. Second-step classification with the risk model selected an additional 46.0% of all PUL as low risk. Overall, the two-step protocol classified 62.1% of PUL as low risk, with an NPV of 98.6% and a sensitivity of 92.0%. When the risk model was used in isolation (i.e. without the first step), 60.5% of PUL were classified as low risk with 99.1% NPV and 94.9% sensitivity. CONCLUSION PUL can be classified efficiently into being either high or low risk for complications using a two-step protocol involving initial progesterone and hCG levels and the hCG ratio. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- B Van Calster
- KU Leuven, Department of Development and Regeneration, Leuven, Belgium
| | - S Bobdiwala
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - S Guha
- West Middlesex Hospital, Isleworth, Middlesex, UK
| | | | - M Al-Memar
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - R Harvey
- Charing Cross Oncology Laboratory and Trophoblastic Disease Center, Charing Cross Hospital, London, UK
| | - J Farren
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - E Kirk
- North Middlesex Hospital, London, UK
| | - G Condous
- Acute Gynaecology, Early Pregnancy and Advanced Endosurgery Unit, Nepean Medical School, Nepean Hospital, University of Sydney, Kingswood, NSW, Australia
| | - S Sur
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - C Stalder
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - D Timmerman
- KU Leuven, Department of Development and Regeneration, Leuven, Belgium
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - T Bourne
- KU Leuven, Department of Development and Regeneration, Leuven, Belgium
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
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Bobdiwala S, Guha S, Van Calster B, Ayim F, Mitchell-Jones N, Al-Memar M, Mitchell H, Stalder C, Bottomley C, Kothari A, Timmerman D, Bourne T. The clinical performance of the M4 decision support model to triage women with a pregnancy of unknown location as at low or high risk of complications. Hum Reprod 2016; 31:1425-35. [PMID: 27165655 DOI: 10.1093/humrep/dew105] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 04/07/2016] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION What are the adverse outcomes associated with using the M4 model in everyday clinical practice for women with pregnancy of unknown location (PUL)? SUMMARY ANSWER There were 17/835 (2.0%) adverse events and no serious adverse events associated with the performance of the M4 model in clinical practice. WHAT IS KNOWN ALREADY The M4 model has previously been shown to stratify women classified as a PUL as at low or high risk of complications with a good level of test performance. The triage performance of the M4 model is better than single measurements of serum progesterone or the hCG ratio (serum hCG at 48 h/hCG at presentation). STUDY DESIGN, SIZE, DURATION A prospective multi-centre cohort study of 1022 women with a PUL carried out between August 2012 and December 2013 across 2 university teaching hospitals and 1 district general hospital. PARTICIPANTS/MATERIALS, SETTING, METHODS All women presenting with a PUL to the early pregnancy units of the three hospitals were recruited. The final outcome for PUL was either a failed PUL (FPUL), intrauterine pregnancy (IUP) or ectopic pregnancy (EP) (including persistent PUL (PPUL)), with EP and PPUL considered high-risk PUL. Their hCG results at 0 and 48 h were entered into the M4 model algorithm. If the risk of EP was ≥5%, the PUL was predicted to be high-risk and the participant was asked to re-attend 48 h later for a repeat hCG and transvaginal ultrasound scan by a senior clinician. If the PUL was classified as 'low risk, likely failed PUL', the participant was asked to perform a urinary pregnancy test 2 weeks later. If the PUL was classified as 'low risk, likely intrauterine', the participant was scheduled for a repeat scan in 1 week. Deviations from the management protocol were recorded as either an 'unscheduled visit (participant reason)', 'unscheduled visit (clinician reason)' or 'differences in timing (blood test/ultrasound)'. Adverse events were assessed using definitions outlined in the UK Good Clinical Practice Guidelines' document. MAIN RESULTS AND THE ROLE OF CHANCE A total of 835 (82%) women classified as a PUL were managed according to the M4 model (9 met the exclusion criteria, 69 were lost to follow-up, 109 had no hCG result at 48 h). Of these, 443 (53%) had a final outcome of FPUL, 298 (36%) an IUP and 94 (11%) an EP. The M4 model predicted 70% (585/835) PUL as low risk, of which 568 (97%) were confirmed as FPUL or IUP. Of the 17 EP and PPUL misclassified as low risk, 5 had expectant management, 7 medical management with methotrexate and 5 surgical intervention.Nineteen PUL had an unscheduled visit (participant reason), 38 PUL had an unscheduled visit (clinician reason) and 68 PUL had deviations from protocol due to a difference in timing (blood test/ultrasound).Adverse events were reported in 26 PUL and 1 participant had a serious adverse event. A total of 17/26 (65%) adverse events were misclassifications of a high risk PUL as low risk by the M4 model, while 5/26 (19%) adverse events were related to incorrect clinical decisions. Four of the 26 adverse events (15%) were secondary to unscheduled admissions for pain/bleeding. The serious adverse event was due to an incorrect clinical decision. LIMITATIONS, REASONS FOR CAUTION A limitation of the study was that 69/1022 (7%) of PUL were lost to follow-up. A 48 h hCG level was missing for 109/1022 (11%) participants. WIDER IMPLICATIONS OF THE FINDINGS The low number of adverse events (2.0%) suggests that expectant management of PUL using the M4 prediction model is safe. The model is an effective way of triaging women with a PUL as being at high- and low-risk of complications and rationalizing follow-up. The multi-centre design of the study is more likely to make the performance of the M4 model generalizable in other populations. STUDY FUNDING/COMPETING INTERESTS None. TRIAL REGISTRATION NUMBER Not applicable.
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Affiliation(s)
- S Bobdiwala
- Tommy's National Early Miscarriage Research Centre, Queen Charlottes & Chelsea Hospital, Imperial College, Du Cane Road, London W12 0HS, UK
| | - S Guha
- Tommy's National Early Miscarriage Research Centre, Queen Charlottes & Chelsea Hospital, Imperial College, Du Cane Road, London W12 0HS, UK West Middlesex University Hospital, Twickenham Road, Isleworth, London TW7 6AF, UK
| | - B Van Calster
- Department of Development and Regeneration, KU Leuven, Herestraat 49 Box 7003, Leuven B-3000, Belgium
| | - F Ayim
- Hillingdon Hospital, Pield Heath Road, Uxbridge UB8 3NN, UK
| | - N Mitchell-Jones
- Chelsea & Westminster Hospital, 329 Fulham Road, London SW10 9NH, UK
| | - M Al-Memar
- Tommy's National Early Miscarriage Research Centre, Queen Charlottes & Chelsea Hospital, Imperial College, Du Cane Road, London W12 0HS, UK
| | - H Mitchell
- Hillingdon Hospital, Pield Heath Road, Uxbridge UB8 3NN, UK
| | - C Stalder
- Tommy's National Early Miscarriage Research Centre, Queen Charlottes & Chelsea Hospital, Imperial College, Du Cane Road, London W12 0HS, UK
| | - C Bottomley
- Chelsea & Westminster Hospital, 329 Fulham Road, London SW10 9NH, UK
| | - A Kothari
- Hillingdon Hospital, Pield Heath Road, Uxbridge UB8 3NN, UK
| | - D Timmerman
- Department of Development and Regeneration, KU Leuven, Herestraat 49 Box 7003, Leuven B-3000, Belgium Department of Obstetrics and Gynaecology, University Hospitals Leuven, Campus Gasthuisberg, KU Leuven, Belgium
| | - T Bourne
- Tommy's National Early Miscarriage Research Centre, Queen Charlottes & Chelsea Hospital, Imperial College, Du Cane Road, London W12 0HS, UK Department of Development and Regeneration, KU Leuven, Herestraat 49 Box 7003, Leuven B-3000, Belgium Department of Obstetrics and Gynaecology, University Hospitals Leuven, Campus Gasthuisberg, KU Leuven, Belgium
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Ray S, Talukdar A, Sonthalia N, Saha M, Kundu S, Khanra D, Guha S, Basu AK, Mukherjee A, Ray D, Ganguly S. Serum lipoprotein ratios as markers of insulin resistance: a study among non-diabetic acute coronary syndrome patients with impaired fasting glucose. Indian J Med Res 2016; 141:62-7. [PMID: 25857496 PMCID: PMC4405942 DOI: 10.4103/0971-5916.154504] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND & OBJECTIVES Recent data suggest that insulin resistance can predict cardiovascular disease independently of the other risk factors, such as hypertension, visceral obesity or dyslipidaemia. However, the majority of available methods to evaluate insulin resistance are complicated to operate, expensive, and time consuming. This study was undertaken to assess whether serum lipoprotein ratios could predict insulin resistance in non-diabetic acute coronary syndrome (ACS) patients. METHODS Ninety non-diabetic patients with impaired fasting glucose admitted with a diagnosis of ACS were included in the study. At the time of admission fasting glucose and insulin concentrations were measured. The homeostatic model assessment-insulin resistance (HOMA-IR) was used for insulin resistance. The fasting serum total cholesterol (TC), triglycerides (TG) and high density lipoprotein cholesterol (HDL-C) levels were checked, and then TC/HDL-C and TG/HDL-C ratios were calculated. The areas under the curves (AUC) of the receiver operating characteristic (ROC) curves were used to compare the power of these serum lipoprotein ratios as markers. RESULTS Lipoprotein ratios were significantly higher in patients with HOMA-IR index > 2.5 as compared to patients with index <2.5 (P < 0.05). Both TG/HDL-C and TC/HDL-C ratios were significantly correlated with HOMA-IR (P<0.05). The area under the ROC curve of the TG/HDL-C and TC/HDL-C ratio for predicting insulin resistance was 0.80 (95% CI, 0.67 to 0.93), 0.78 (95% CI, 0.65 to 0.91), respectively. INTERPRETATION & CONCLUSIONS The findings of this study demonstrate that serum lipoprotein ratios can provide a simple means of identifying insulin resistance and can be used as markers of insulin resistance and cardiovascular diseases risk in adult non-diabetic patients.
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Affiliation(s)
| | - A Talukdar
- Department of General Medicine, Medical College & Hospital, Kolkata, West Bengal, India
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Malik H, Sharma V, Saini S, Guha S, Malakar D. 225 AUTOLOGOUS TRANSPLANTATION OF MESENCHYMAL STEM CELLS DERIVED FROM ADIPOSE TISSUE IN ANIMAL. Reprod Fertil Dev 2016. [DOI: 10.1071/rdv28n2ab225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The present study was carried out for isolation and culture of adipose tissue-derived mesenchymal stem cells of goat (gADSC) and dogs (1 dog was suffering from hip dysplasia and another dog from paraplegia) and their characterisation with different markers. Adipose tissue of goat and dog were aseptically isolated and treated with collagenase for 2 h in a CO2 incubator. The enzymatic digested cells were filtered through a 41-µm filter and cells were resuspended in cell culture flask containing medium DMEM/F12, 10% fetal bovine serum, and 50 μg mL–1 gentamycin. In vitro-cultured ADSC were characterised by amplification of mesenchymal stem cell (MSC)-specific surface marker genes of CD44, CD29, and CD166 in PCR and by immunocytochemistry of MSC-specific marker of CD44. For in vitro chondrogenesis, ADSC at passage 3 were incubated in DMEM/F12 containing 100 nM dexamethasone, 1.25 μg mL–1 BSA, and 10 ng mL–1 BMP-4 ITS (insulin-transferrin-selenium) for 3 wk. Chondrogenic differentiation cells were confirmed by Safranin O staining and positive expression of chondrocyte-specific marker genes Aggrecan: primers F-TTGGACTTTGGCAGAATACC and R-CTTCCACCAATGTCGTATCC, and Collagen II: primers F-AACCCTGGAACTGACGGAAT and R-CTCACCCGTTTGACCTTTCG in PCR. Dog ADSC-derived chondrocytes were aseptically injected at 1 × 106 cells kg–1 of BW into dogs with hip dysplasia and paraplegia. Both dogs recovered well after 1 month of autologous transplantation and were able to move freely. Then, 10 dogs having massive wounds were injected with heterologous undifferentiated mesenchymal stem cells at 1 × 106 cells kg–1 of BW and all dogs were cured in an average of 20 days. Then, the paralyzed and fractured dogs were further treated with undifferentiated MSC at 1 × 106 cells kg–1 of BW and most of the dogs were cured properly. These findings may have implications for defining the physiological roles of ADSC in arthritis, some orthopaedic problems, joint regeneration, and neurological disorders and several new applications leading to novel therapeutic opportunities.
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Kogikoski S, Sousa CP, Liberato MS, Andrade-Filho T, Prieto T, Ferreira FF, Rocha AR, Guha S, Alves WA. Multifunctional biosensors based on peptide–polyelectrolyte conjugates. Phys Chem Chem Phys 2016; 18:3223-33. [DOI: 10.1039/c5cp07165h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The crystal structure of self-assembled peptide nanostructures dictates the conductivity. We show that the orthorhombic phase can be doped with PAH, improving hole and electron injection, opening opportunities for self-assembled peptide composites.
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Affiliation(s)
- S. Kogikoski
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - C. P. Sousa
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - M. S. Liberato
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - T. Andrade-Filho
- Instituto de Ciências Exatas
- Faculdade de Física
- Universidade Federal do Sul e Sudeste do Pará
- Marabá
- Brazil
| | - T. Prieto
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - F. F. Ferreira
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - A. R. Rocha
- Instituto de Física Teórica
- Universidade Estadual Paulista – UNESP
- São Paulo
- Brazil
| | - S. Guha
- Department of Physics of Astronomy
- University of Missouri
- Columbia
- USA
| | - W. A. Alves
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
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Liberato MS, Kogikoski S, da Silva ER, de Araujo DR, Guha S, Alves WA. Polycaprolactone fibers with self-assembled peptide micro/nanotubes: a practical route towards enhanced mechanical strength and drug delivery applications. J Mater Chem B 2016; 4:1405-1413. [DOI: 10.1039/c5tb02240a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The conjugation between micro/nanotubes of l,l-diphenylalanine and polycaprolactone has led to ductile composite fibers suitable for designing polymer membranes potentially usable as degradable skin patches in drug delivery.
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Affiliation(s)
- M. S. Liberato
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - S. Kogikoski
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - E. R. da Silva
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - D. R. de Araujo
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
| | - S. Guha
- Department of Physics and Astronomy
- University of Missouri
- Columbia
- USA
| | - W. A. Alves
- Centro de Ciências Naturais e Humanas
- Universidade Federal do ABC
- Santo André
- Brazil
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Ray M, Guha S, Ray M, Kundu A, Ray B, Kundu K, Goswami S, Bhatt D, Selker H, Goldberg R. Cardiovascular health awareness among school-aged children in a rural district of India. Indian Heart J 2015. [DOI: 10.1016/j.ihj.2015.10.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Buchmueller O, Citron M, Ellis J, Guha S, Marrouche J, Olive KA, de Vries K, Zheng J. Collider Interplay for Supersymmetry, Higgs and Dark Matter. Eur Phys J C Part Fields 2015; 75:469. [PMID: 26457063 PMCID: PMC4591918 DOI: 10.1140/epjc/s10052-015-3675-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 09/09/2015] [Indexed: 06/05/2023]
Abstract
We discuss the potential impacts on the CMSSM of future LHC runs and possible [Formula: see text] and higher-energy proton-proton colliders, considering searches for supersymmetry via [Formula: see text] events, precision electroweak physics, Higgs measurements and dark matter searches. We validate and present estimates of the physics reach for exclusion or discovery of supersymmetry via [Formula: see text] searches at the LHC, which should cover the low-mass regions of the CMSSM parameter space favoured in a recent global analysis. As we illustrate with a low-mass benchmark point, a discovery would make possible accurate LHC measurements of sparticle masses using the MT2 variable, which could be combined with cross-section and other measurements to constrain the gluino, squark and stop masses and hence the soft supersymmetry-breaking parameters [Formula: see text] and [Formula: see text] of the CMSSM. Slepton measurements at CLIC would enable [Formula: see text] and [Formula: see text] to be determined with high precision. If supersymmetry is indeed discovered in the low-mass region, precision electroweak and Higgs measurements with a future circular [Formula: see text] collider (FCC-ee, also known as TLEP) combined with LHC measurements would provide tests of the CMSSM at the loop level. If supersymmetry is not discovered at the LHC, it is likely to lie somewhere along a focus-point, stop-coannihilation strip or direct-channel A / H resonance funnel. We discuss the prospects for discovering supersymmetry along these strips at a future circular proton-proton collider such as FCC-hh. Illustrative benchmark points on these strips indicate that also in this case FCC-ee could provide tests of the CMSSM at the loop level.
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Affiliation(s)
- O. Buchmueller
- />High Energy Physics Group, Blackett Lab., Imperial College, Prince Consort Road, London, SW7 2AZ UK
| | - M. Citron
- />High Energy Physics Group, Blackett Lab., Imperial College, Prince Consort Road, London, SW7 2AZ UK
| | - J. Ellis
- />Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London, WC2R 2LS UK
- />Physics Department, CERN, 1211 Geneva 23, Switzerland
| | - S. Guha
- />Physics Department, CERN, 1211 Geneva 23, Switzerland
- />BITS Pilani, Goa Campus, Goa, India
| | - J. Marrouche
- />High Energy Physics Group, Blackett Lab., Imperial College, Prince Consort Road, London, SW7 2AZ UK
- />Physics Department, CERN, 1211 Geneva 23, Switzerland
| | - K. A. Olive
- />William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, Univ. of Minnesota, Minneapolis, MN 55455 USA
| | - K. de Vries
- />High Energy Physics Group, Blackett Lab., Imperial College, Prince Consort Road, London, SW7 2AZ UK
| | - Jiaming Zheng
- />William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, Univ. of Minnesota, Minneapolis, MN 55455 USA
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Guha S, Warsinke A, Tientcheu CM, Schmalz K, Meliani C, Wenger C. Label free sensing of creatinine using a 6 GHz CMOS near-field dielectric immunosensor. Analyst 2015; 140:3019-27. [PMID: 25782697 DOI: 10.1039/c4an02194k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we present a CMOS high frequency direct immunosensor operating at 6 GHz (C-band) for label free determination of creatinine. The sensor is fabricated in standard 0.13 μm SiGe:C BiCMOS process. The report also demonstrates the ability to immobilize creatinine molecules on a Si3N4 passivation layer of the standard BiCMOS/CMOS process, therefore, evading any further need of cumbersome post processing of the fabricated sensor chip. The sensor is based on capacitive detection of the amount of non-creatinine bound antibodies binding to an immobilized creatinine layer on the passivated sensor. The chip bound antibody amount in turn corresponds indirectly to the creatinine concentration used in the incubation phase. The determination of creatinine in the concentration range of 0.88-880 μM is successfully demonstrated in this work. A sensitivity of 35 MHz/10 fold increase in creatinine concentration (during incubation) at the centre frequency of 6 GHz is gained by the immunosensor. The results are compared with a standard optical measurement technique and the dynamic range and sensitivity is of the order of the established optical indication technique. The C-band immunosensor chip comprising an area of 0.3 mm(2) reduces the sensing area considerably, therefore, requiring a sample volume as low as 2 μl. The small analyte sample volume and label free approach also reduce the experimental costs in addition to the low fabrication costs offered by the batch fabrication technique of CMOS/BiCMOS process.
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Affiliation(s)
- S Guha
- IHP, Im Technologie Park 25, 15236, Frankfurt (Oder), Germany.
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Guha S, Schmalz K, Wenger C, Herzel F. Self-calibrating highly sensitive dynamic capacitance sensor: towards rapid sensing and counting of particles in laminar flow systems. Analyst 2015; 140:3262-72. [PMID: 25793229 DOI: 10.1039/c5an00187k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this report we propose a sensor architecture and a corresponding read-out technique on silicon for the detection of dynamic capacitance change. This approach can be applied to rapid particle counting and single particle sensing in a fluidic system. The sensing principle is based on capacitance variation of an interdigitated electrode (IDE) structure embedded in an oscillator circuit. The capacitance scaling of the IDE results in frequency modulation of the oscillator. A demodulator architecture is employed to provide a read-out of the frequency modulation caused by the capacitance change. A self-calibrating technique is employed at the read-out amplifier stage. The capacitance variation of the IDE due to particle flow causing frequency modulation and the corresponding demodulator read-out has been analytically modelled. Experimental verification of the established model and the functionality of the sensor chip were shown using a modulating capacitor independent of fluidic integration. The initial results show that the sensor is capable of detecting frequency changes of the order of 100 parts per million (PPM), which translates to a shift of 1.43 MHz at 14.3 GHz operating frequency. It is also shown that a capacitance change every 3 μs can be accurately detected.
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Affiliation(s)
- S Guha
- IHP, Leibniz Institute for Innovative Microelectronics, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany.
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Mann K, Massey TL, Guha S, van Kleef JP, Maharbiz MM. A wearable wireless platform for visually stimulating small flying insects. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2014:1654-7. [PMID: 25570291 DOI: 10.1109/embc.2014.6943923] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Linking neurons and muscles to their roles in behavior requires not only the ability to measure their response during unrestrained movement but also the ability to stimulate them and observe the behavioral results. Current wireless stimulation technologies can be carried by rodent-sized animals and very large insects. However, the mass and volume of these devices make them impractical for studying smaller animals like insects. Here we present a battery-powered electronics platform suitable to be carried on a flying locust (2.7 g). The device has an IR-based (infrared) receiver, can deliver optical or electrical stimulation, occupies a volume of 0.1 cm(3), and weighs ~280 mg. We show the device is capable of powering two white SMD light emitting diodes (LEDs) for ~4 min and can be recharged in ~20 min. We demonstrate that our system shows no crosstalk with an IR-based Vicon tracking system. The entire package is made from commercial off-the-shelf components and requires no microfabrication.
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Shah K, Roy R, Guha S, Bhargava M, Shah SV, Lobo A, Das D, Majumder AK. Severe visual loss following obstetric forceps delivery-related ocular trauma in a neonate. J OBSTET GYNAECOL 2014; 35:415. [PMID: 25356829 DOI: 10.3109/01443615.2014.969205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- K Shah
- Aditya Birla Sankara Nethralaya , Kolkata, West Bengal , India
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Banerjee R, Ray K, Bhattacherjee S, Guha S, Banerjee I, Nath I. A study of insulin resistance and its clinico-metabolic associations among apparently healthy individuals attending a tertiary care hospital. Ann Med Health Sci Res 2014; 4:823-8. [PMID: 25328801 PMCID: PMC4199182 DOI: 10.4103/2141-9248.141572] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Insulin resistance (IR), as a result of unhealthy life-styles and westernization, most likely contributes to the increased incidence of metabolic abnormalities and consequently, the development of metabolic syndrome (MS). AIM The present study was undertaken to determine the magnitude of IR and associated clinico-metabolic risk factors among the out-patients of a tertiary care hospital in Bihar, India. SUBJECTS AND METHODS Anthropometric profile, lipid profile, fasting blood glucose, C-reactive protein (CRP) and C-peptide of 112 individuals were measured using the standard procedures. IR was assessed using the homeostasis model (Homeostatic model assessment [HOMA]-IR). RESULTS The mean IR was 1.5 (1.0). Individuals with MS, higher body mass index and CRP ≥6 mg/l had higher IR. Linear regression showed, among the components of MS, waist circumference had the highest contribution toward IR. The optimal cut-off value to detect IR by HOMA2-IR was 1.35. CONCLUSION IR was found to have a strong association with various clinico-metabolic risk factors.
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Affiliation(s)
- R Banerjee
- Department of Biochemistry, North Bengal Medical College and Hospital, Siliguri, West Bengal, India
| | - K Ray
- Department of Community Medicine, North Bengal Medical College and Hospital, Siliguri, West Bengal, India
| | - S Bhattacherjee
- Department of Community Medicine, North Bengal Medical College and Hospital, Siliguri, West Bengal, India
| | - S Guha
- Malda Medical College and Hospital, Malda, West Bengal, India
| | - I Banerjee
- Department of Medicine, Mata Gujri Memorial Medical College and LSK Hospital, Kishanganj, Bihar, India
| | - I Nath
- Department of Biochemistry, North Bengal Medical College and Hospital, Siliguri, West Bengal, India
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Abstract
Extramedullary hematopoiesis (EMH) refers to hematopoiesis occurring outside the medulla of bone. It may be physiologic or due to pathological conditions like hematopoietic disorders. EMH can involve liver, spleen, thorax, and lymph nodes. It can involve paraspinal tissues with extension and involvement of spinal canal. In our case, the diagnosis was confirmed by the history of the patient stating underlying hematological condition and by magnetic resonance imaging (MRI) findings showing large soft tissue masses in paraspinal areas with involvement of spinal canal and leading to cord compression.
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Affiliation(s)
- M A Hashmi
- MRI Section, EKO CT and MRI Scan Centre, Medical College and Hospitals Campus, Kolkata, India
| | - S Guha
- Department of Paediatrics, Vivekananda Hospital, Kolkata, India
| | - P Sengupta
- Department of Neurology, Medical College, and Hospitals, Kolkata, India
| | - D Basu
- Department of Neurology, Medical College, and Hospitals, Kolkata, India
| | - S Baboo
- Department of Radiology, Darbhanga Medical College, India
| | - Neha
- Department of Radiology, Darbhanga Medical College, India
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You R, Li M, Guha S, Mulholland GW, Zachariah MR. Bionanoparticles as Candidate Reference Materials for Mobility Analysis of Nanoparticles. Anal Chem 2014; 86:6836-42. [DOI: 10.1021/ac403503q] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- R. You
- University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - M. Li
- University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - S. Guha
- University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - G. W. Mulholland
- University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - M. R. Zachariah
- University of Maryland, College Park, Maryland 20742, United States
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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Shukla S, Mahl TC, Guha S. Letter: probiotics vs. lactulose for minimal hepatic encephalopathy therapy--authors' reply. Aliment Pharmacol Ther 2014; 39:1001. [PMID: 24689352 DOI: 10.1111/apt.12700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 02/22/2014] [Indexed: 12/08/2022]
Affiliation(s)
- S Shukla
- Department of Medicine, University at Buffalo, State University of New York, Buffalo, NY, USA
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Ikuta T, Peters BD, Guha S, John M, Karlsgodt KH, Lencz T, Szeszko PR, Malhotra AK. A schizophrenia risk gene, ZNF804A, is associated with brain white matter microstructure. Schizophr Res 2014; 155:15-20. [PMID: 24685285 PMCID: PMC4060886 DOI: 10.1016/j.schres.2014.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 02/27/2014] [Accepted: 03/01/2014] [Indexed: 01/03/2023]
Abstract
Genome-wide association studies have provided strong evidence for association of the SNP rs1344706 in the ZNF804A gene with schizophrenia and bipolar disorder. Neuroimaging studies have suggested that variation at rs1344706 may be associated with neural endophenotypes such as white matter volumes and densities. However, analyses of white matter microstructure using diffusion tensor imaging (DTI) have produced conflicting results. We examined the association between rs1344706 and white matter microstructure in 107 healthy individuals using tract-based spatial statistics (TBSS). TBSS analysis showed significant association between the risk allele and lower fractional anisotropy in the corpus callosum, left forceps minor, and right parietal white matter (p<.05; FWE corrected). Post-hoc analyses indicated that this association was largely driven by alterations in radial diffusivity, consistent with an effect of genotype on myelination. In light of the strong DTI evidence for white matter microstructural abnormalities in schizophrenia, the current results implicate a potential mechanism for schizophrenia risk formation by ZNF804A rs1344706 genotype.
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Affiliation(s)
- T Ikuta
- Department of Communication Sciences and Disorders, School of Applied Sciences, University of Mississippi, University, MS, USA.
| | - B D Peters
- Division of Psychiatry Research, Zucker Hillside Hospital, Glen Oaks, NY, USA
| | - S Guha
- Division of Medical Genetics, Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, NY, USA
| | - M John
- Division of Psychiatry Research, Zucker Hillside Hospital, Glen Oaks, NY, USA; Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - K H Karlsgodt
- Division of Psychiatry Research, Zucker Hillside Hospital, Glen Oaks, NY, USA; Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY, USA; Hofstra North Shore-LIJ School of Medicine, Departments of Psychiatry and Molecular Medicine, Hempstead, NY, USA
| | - T Lencz
- Division of Psychiatry Research, Zucker Hillside Hospital, Glen Oaks, NY, USA; Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY, USA; Hofstra North Shore-LIJ School of Medicine, Departments of Psychiatry and Molecular Medicine, Hempstead, NY, USA
| | - P R Szeszko
- Division of Psychiatry Research, Zucker Hillside Hospital, Glen Oaks, NY, USA; Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY, USA; Hofstra North Shore-LIJ School of Medicine, Departments of Psychiatry and Molecular Medicine, Hempstead, NY, USA
| | - A K Malhotra
- Division of Psychiatry Research, Zucker Hillside Hospital, Glen Oaks, NY, USA; Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY, USA; Hofstra North Shore-LIJ School of Medicine, Departments of Psychiatry and Molecular Medicine, Hempstead, NY, USA
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Guha S, Ayim F, Ludlow J, Sayasneh A, Condous G, Kirk E, Stalder C, Timmerman D, Bourne T, Van Calster B. Triaging pregnancies of unknown location: the performance of protocols based on single serum progesterone or repeated serum hCG levels. Hum Reprod 2014; 29:938-45. [DOI: 10.1093/humrep/deu045] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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Xu C, Wallace MB, Yang J, Jiang L, Zhai Q, Zhang Y, Hong C, Chen Y, Frank TS, Stauffer JA, Asbun HJ, Raimondo M, Woodward TA, Li Z, Guha S, Zheng L, Li M. ZIP4 is a novel diagnostic and prognostic marker in human pancreatic cancer: a systemic comparison between EUS-FNA and surgical specimens. Curr Mol Med 2014; 14:309-15. [PMID: 24345208 PMCID: PMC6870177 DOI: 10.2174/1566524013666131217112921] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 12/11/2013] [Accepted: 12/12/2013] [Indexed: 12/31/2022]
Abstract
Aberrant expression of a zinc transporter ZIP4 in pancreatic ductal adenocarcinoma (PDAC) has been shown to contribute to tumor progression and is a potential target for individualized therapy. The overall objective of this study was to determine whether ZIP4 could serve as a novel diagnostic and prognostic marker in human PDAC, and if it can be assessed by minimally invasive sampling using endoscopic ultrasound guided fine needle aspiration (EUS-FNA). Immunohistochemistry was performed to compare ZIP4 expression in the PDAC samples obtained from EUS-FNA and matched surgical tumors (parallel control). Samples were reported by sensitivity, specificity, and predictive values, all with 95% confidence intervals (CI). A total of 23 cases with both FNA and surgical specimens were evaluated. We found that ZIP4 was significantly overexpressed in tumor cells from both sets of samples. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of ZIP4 for the diagnosis of PDAC were 72.9%, 72.5%, 76.1%, and 69.0% in EUS-FNA samples, and were 97.9%, 65.4%, 83.9%, and 94.4% in surgical specimens, respectively. The association between the positive rate of ZIP4 expression in FNA and surgical samples is statistically significant (P=0.0216). Both the intensity and percentage of ZIP4 positive cells from the surgical samples correlated significantly with tumor stage (P=0.0025 and P=0.0002). ZIP4 intensity level in FNA samples was significantly associated with tumor differentiation and patient survival. These results indicate that EUS-FNA is capable of non-operative detection of ZIP4, thus offering the potential to direct pre-operative detection and targeted therapy of PDAC.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - M Li
- Vivian L. Smith Department of Neurosurgery, the University of Texas Medical School at Houston, 6431 Fannin Street, MSE R131, Houston, TX 77030, USA.
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Capellini G, Reich C, Guha S, Yamamoto Y, Lisker M, Virgilio M, Ghrib A, El Kurdi M, Boucaud P, Tillack B, Schroeder T. Tensile Ge microstructures for lasing fabricated by means of a silicon complementary metal-oxide-semiconductor process. Opt Express 2014; 22:399-410. [PMID: 24515000 DOI: 10.1364/oe.22.000399] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this work we study, using experiments and theoretical modeling, the mechanical and optical properties of tensile strained Ge microstructures directly fabricated in a state-of-the art complementary metal-oxide-semiconductor fabrication line, using fully qualified materials and methods. We show that these microstructures can be used as active lasing materials in mm-long Fabry-Perot cavities, taking advantage of strain-enhanced direct band gap recombination. The results of our study can be realistically applied to the fabrication of a prototype platform for monolithic integration of near infrared laser sources for silicon photonics.
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Guha S, Van Belle V, Bottomley C, Preisler J, Vathanan V, Sayasneh A, Stalder C, Timmerman D, Bourne T. External validation of models and simple scoring systems to predict miscarriage in intrauterine pregnancies of uncertain viability. Hum Reprod 2013; 28:2905-11. [DOI: 10.1093/humrep/det342] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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Adil D, Guha S. Surface-enhanced Raman spectroscopic studies of the Au-pentacene interface: A combined experimental and theoretical investigation. J Chem Phys 2013; 139:044715. [DOI: 10.1063/1.4816817] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Achari R, Guha S, Chandra A, Sen S, Mahata A, Chatterjee S, Mallick I. PD-0466: Apparent diffusion coefficient in carcinoma cervix: an imaging biomarker for radiation response. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)32772-9] [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: 10/23/2022]
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Sarkar S, Mahata A, Ray R, Guha S, Mallick I, Achair R, Sinha S, Chatterjee S. EP-1016: Can Weight loss alert adaptive planning to reduce parotid gland dose? A correlative study to guide adaptive radiation. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33322-3] [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: 10/23/2022]
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46
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Knaapila M, Konôpková Z, Torkkeli M, Haase D, Liermann HP, Guha S, Scherf U. Structural study of helical polyfluorene under high quasihydrostatic pressure. Phys Rev E Stat Nonlin Soft Matter Phys 2013; 87:022602. [PMID: 23496539 DOI: 10.1103/physreve.87.022602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 12/27/2012] [Indexed: 05/24/2023]
Abstract
We report on an x-ray diffraction (XRD) study of helical poly[9,9-bis(2-ethylhexyl)fluorene] (PF2/6) under high quasihydrostatic pressure and show an effect of pressure on the torsion angle (dihedral angle) between adjunct repeat units and on the hexagonal unit cell. A model for helical backbone conformation is constructed. The theoretical position for the most prominent 00l x-ray reflection is calculated as a function of torsion angle. The XRD of high molecular weight PF2/6 (M(n)=30 kg/mol) is measured through a diamond anvil cell upon pressure increase from 1 to 10 GPa. The theoretically considered 00l reflection is experimentally identified, and its shift with the increasing pressure is found to be consistent with the decreasing torsion angle between 2 and 6 GPa. This indicates partial backbone planarization towards a more open helical structure. The h00 peak is identified, and its shift together with the broadening of 00l implies impairment of the ambient hexagonal order, which begins at or below 2 GPa. Previously collected high-pressure photoluminescence data are reanalyzed and are found to be qualitatively consistent with the XRD data. This paper provides an example of how the helical π-conjugated backbone structure can be controlled by applying high quasihydrostatic pressure without modifications in its chemical structure. Moreover, it paves the way for wider use of high-pressure x-ray scattering in the research of π-conjugated polymers.
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Affiliation(s)
- M Knaapila
- Physics Department, Institute for Energy Technology, Kjeller NO-2027, Norway.
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Van Calster B, Abdallah Y, Guha S, Kirk E, Van Hoorde K, Condous G, Preisler J, Hoo W, Stalder C, Bottomley C, Timmerman D, Bourne T. Rationalizing the management of pregnancies of unknown location: temporal and external validation of a risk prediction model on 1962 pregnancies. Hum Reprod 2013; 28:609-16. [DOI: 10.1093/humrep/des440] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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Trivedi SB, Chen RJ, Grasza K, Kutcher SW, Nathan GVJ, Steier WH, Bacher D, Guha S, Hood P. Broad Band Optical Power Limiting in Vanadium Doped Cd0.55Mn0 45Te Crystals. ACTA ACUST UNITED AC 2012. [DOI: 10.1557/proc-479-179] [Citation(s) in RCA: 3] [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: 11/13/2022]
Abstract
AbstractA variety of approaches have been used for optical limiting in the past [1–6].A relatively new approach, an electro-optic power limiter (EOPL) has a simple and compact design, wavelength agile sensitivity, the ability to respond to coherent as well as incoherent radiation, low threshold and a large field of view (up to 15°). EOPL devices allow the transmission of low intensity background radiation while simultaneously blocking the damaging high intensity beam. We have demonstrated EOPL in the past using the II-VI semiconductors CdTe:In [7,8], CdTe:V [9] and ZnTe [10]. In this paper, we are reporting on EOPL using a new ternary II-VI semiconductor Cdl-xMnxTe:V. Cd0.55Mn0.45Te is capable of limiting optical radiation from visible (0.630.tm) to near infrared (1.5pm) wavelengths, which covers the wavelength ranges of both CdTe and ZnTe combined. Additionally, crystals of Cd0.55Mn0.45Te are relatively easier to grow than ZnTe. We report our preliminary results of optical limiting in Cd0.55Mn0.45Te:V at 0.780μm, 0.895μm, and 1.06μm, and we discuss the materials issues involved in improving and optimizing Cd1-xMnxTe for electro-optic power limiting.
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Prasad D, Das P, Saha N, Nandi M, Guha S, Chatterjee S, Achari R, Mallick I. PD-0355 CAN OFFLINE CORRECTIONS EFFECTIVELY SUBSTITUTE FOR DAILY ONLINE IMAGING IN RADIOTHERAPY OF CARCINOMA OF PROSTATE? Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)70694-1] [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: 11/25/2022]
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Guha S, Mukherjee N, Chaudhury P. A simulated annealing based study to design optimum pulses for selective target excitation in vibrational levels. Indian J Phys 2012; 86:245-252. [DOI: 10.1007/s12648-012-0065-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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