51
|
Ray S, Corenblum MJ, Anandhan A, Reed A, Ortiz FO, Zhang DD, Barnes CA, Madhavan L. A Role for Nrf2 Expression in Defining the Aging of Hippocampal Neural Stem Cells. Cell Transplant 2018; 27:589-606. [PMID: 29871525 PMCID: PMC6041888 DOI: 10.1177/0963689718774030] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Redox mechanisms are emerging as essential to stem cell function given their capacity to
influence a number of important signaling pathways governing stem cell survival and
regenerative activity. In this context, our recent work identified the reduced expression
of nuclear factor (erythroid-derived 2)-like 2, or Nrf2, in mediating the decline in
subventricular zone neural stem progenitor cell (NSPC) regeneration during aging. Since
Nrf2 is a major transcription factor at the heart of cellular redox regulation and
homeostasis, the current study investigates the role that it may play in the aging of
NSPCs that reside within the other major mammalian germinal niche located in the
subgranular zone (SGZ) of the dentate gyrus (DG) of the hippocampus. Using rats from
multiple aging stages ranging from newborn to old age, and aging Nrf2 knockout mice, we
first determined that, in contrast with subventricular zone (SVZ) NSPCs, Nrf2 expression
does not significantly affect overall DG NSPC viability with age. However, DG NSPCs
resembled SVZ stem cells, in that Nrf2 expression controlled their proliferation and the
balance of neuronal versus glial differentiation particularly in relation to a specific
critical period during middle age. Also, importantly, this Nrf2-based control of NSPC
regeneration was found to impact functional neurogenesis-related hippocampal behaviors,
particularly in the Morris water maze and in pattern separation tasks. Furthermore, the
enrichment of the hippocampal environment via the transplantation of Nrf2-overexpressing
NSPCs was able to mitigate the age-related decline in DG stem cell regeneration during the
critical middle-age period, and significantly improved pattern separation abilities. In
summary, these results emphasize the importance of Nrf2 in DG NSPC regeneration, and
support Nrf2 upregulation as a potential approach to advantageously modulate DG NSPC
activity with age.
Collapse
|
52
|
Ray S, Ghosh A, Sinha S. Drive-induced delocalization in the Aubry-André model. Phys Rev E 2018; 97:010101. [PMID: 29448415 DOI: 10.1103/physreve.97.010101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Indexed: 11/07/2022]
Abstract
Motivated by the recent experiment by Bordia et al. [Nat. Phys. 13, 460 (2017)NPAHAX1745-247310.1038/nphys4020], we study the single particle delocalization phenomena of the Aubry-André (AA) model subjected to periodic drives. In two distinct cases we construct an equivalent classical description to illustrate that the drive-induced delocalization phenomena stems from an instability and the onset of chaos in the underlying dynamics. In the first case we analyze the delocalization and the thermalization in a time modulated AA potential with respect to driving frequency and demonstrate that there exists a threshold value of the amplitude of the drive. In the next example, we show that the periodic modulation of the phase of the hopping amplitude induced by a gauge field leads to an unusual effect on delocalization with a nonmonotonic dependence on the driving frequency. Within a window of such a driving frequency a delocalized Floquet band with a mobility edge appears, exhibiting multifractality in the spectrum as well as in the Floquet eigenfunctions. Finally, we explore the effect of interaction and discuss how the results of the present analysis can be tested experimentally.
Collapse
|
53
|
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] [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.
Collapse
|
54
|
Ray S, Beatrice AM, Ghosh A, Pramanik S, Bhattacharjee R, Ghosh S, Raychaudhury A, Mukhopadhyay S, Chowdhury S. Profile of chronic kidney disease related-mineral bone disorders in newly diagnosed advanced predialysis diabetic kidney disease patients: A hospital based cross-sectional study. Diabetes Metab Syndr 2017; 11 Suppl 2:S931-S937. [PMID: 28728874 DOI: 10.1016/j.dsx.2017.07.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 07/01/2017] [Indexed: 11/29/2022]
Abstract
AIM Chronic kidney disease related-mineral bone disorder (CKD-MBD) has been poorly studied in pre-dialysis Indian CKD population. There are limited data on the pattern of these disturbances in diabetic CKD patients. Therefore, a study was conducted to find out the profile of mineral bone disorders in T2DM patients with pre-dialysis CKD. METHODS In this cross-sectional design, diabetic patients with newly-diagnosed stage 4 and 5 CKD were evaluated. Serum levels of calcium, phosphorus, intact parathyroid hormone (iPTH), 25 hydroxy vitamin D and total alkaline phosphatase (ALP) were measured in all patients. Bone mineral density (BMD) was measured using dual-energy X-ray absorptiometry (DXA). RESULTS A total of 72 eligible patients participated (44 males, 28 females; age 54.2±11.7). Patients with CKD Stage 5 had a lower level of corrected serum calcium and significantly higher level of inorganic phosphorus, total ALP and iPTH as compared to stage 4 patients. Overall, 38.5% were hypocalcemic, 31.43% were hyperphosphatemic. 24.2% of CKD subjects were vitamin D deficient (<10ng/ml) and 41.4% having vitamin D insufficiency (10-20ng/ml). In stage 4, hyperparathyroidism (iPTH>110pg/ml) was detected in nearly 43% of patients. In stage 5, only 32% patients was found to have hyperparathyroidism (iPTH>300pg/ml). There was a good correlation between iPTH and total ALP (r=0.5, p=0.0001) in this cohort. 25 (OH) vitamin D was inversely correlated with ALP (r=-0.39, P=0.001) and showed negative correlation with urine ACR (r=-0.37, P=0.002). As a group, the osteoporotic CKD subjects exhibited higher iPTH (220.1±153.8 vs. 119±108pg/ml, p<0.05) as compared to those who were osteopenic or had normal bone density. There was significant correlation between BMD and iPTH (adjusted r=-0.436; P=0.001). In the multivariate regression model, we found intact PTH to predict BMD even after adjustment of all the confounders. CONCLUSION The current study showed that adynamic bone disease is prevalent even in pre-dialysis CKD population. High bone turnover disease may not be the most prevalent type in diabetic CKD. However, it could contribute to the development of osteoporosis in CKD subjects. Serum total ALP can serve as a biochemical marker to identify pattern of bone turnover where intact PTH is not available.
Collapse
|
55
|
Halkud R, Ray S, Shenoy AM, Arakeri G, Brennan PA. 'Beak Technique' for emergency dilation of tracheostomy stenosis- a technical note. Clin Otolaryngol 2017; 43:983-985. [PMID: 28994202 DOI: 10.1111/coa.13003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2017] [Indexed: 11/28/2022]
|
56
|
Ray S, Mukherjee JJ. Combination therapy with multiple oral hypoglycaemic agents together with short-term basal insulin in new-onset Type 2 diabetes mellitus with marked hyperglycaemia. Diabet Med 2017; 34:1322-1323. [PMID: 28586518 DOI: 10.1111/dme.13393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
57
|
Anstrom C, Kimberlin D, Sunnarborg K, Albrecht K, Fosdal R, Brown K, Ray S, Grove E, Peterson H, Ray T, Troupe E, Anstrom M. Parents and Teachers Acting as Change Agents: The Influence of Nutritional Knowledge to Support the Development of Healthy Behaviors in Children in Rural Appalachia. J Acad Nutr Diet 2017. [DOI: 10.1016/j.jand.2017.06.079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
58
|
Minners J, Rossebo A, Greve A, Ray S, Boman K, Gohlke-Baerwolf C, Neumann F, Wachtell K, Jander N. P2620Sudden death in primarily asymptomatic patients with aortic valve stenosis. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
59
|
Rijnja JP, Kouwenberg PPGM, Ray S, Walbeehm ET. Robert Mathys Finger prosthesis of the proximal interphalangeal joint: a retrospective case series of 19 joints in 17 patients. Arch Orthop Trauma Surg 2017; 137:1155-1160. [PMID: 28608275 DOI: 10.1007/s00402-017-2725-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The Robert Mathys (RM) Finger is a hinged type of arthroplasty for the metacarpophalangeal and proximal interphalangeal (PIP) joint that compensates ligament instability. The aim of this study is to evaluate the outcomes and complications of RM Finger arthroplasty of the PIP joint. MATERIALS AND METHODS A retrospective case series of 19 RM Finger arthroplasties of the PIP joint in 17 patients was performed with a median follow-up of 36 months. The active range of motion (AROM) was measured pre-operatively, at the 6-week follow-up, at the termination of hand therapy, and at the final follow-up. Complications were recorded, as well as pain on a visual analog scale (VAS), stability, deformity, pinch strength, the Michigan Hand Outcomes Questionnaire (MHQ), and the Patient Global Index of Improvement Questionnaire. RESULTS One implant fracture occurred. Another patient had an amputation due to stiffness. For the remaining joints, AROM was 61°. One joint mobilization under local anesthesia, one arthrolysis and two extensor tendon reconstructions were also necessary. Pain at the follow-up was 1.2 on the VAS. Relative pinch strength was 69%. Joint stability was restored in all fingers, although one joint had an ulnar deviation of 15°. Eight fingers developed a snapping phenomenon, of which five had a swan neck deformity. One finger had an extension lag with a Boutonnière deformity. MHQ scores were less compared to the unaffected hand. Fifteen patients rated their outcome as improved compared to their pre-operative condition. CONCLUSIONS RM Finger arthroplasty of the PIP joint restores joint stability with AROM improvement, and with low pain, although it has a high rate of complications. LEVEL OF EVIDENCE IV.
Collapse
|
60
|
Tiraboschi J, Ray S, Patel K, Teague A, Pace M, Phalora P, Robinson N, Hopkins E, Meyerowitz J, Wang Y, Cason J, Kaye S, Sanderson J, Klenerman P, Fidler S, Frater J, Fox J. The impact of immunoglobulin in acute HIV infection on the HIV reservoir: a randomized controlled trial. HIV Med 2017; 18:777-781. [PMID: 28719012 DOI: 10.1111/hiv.12524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Antiretroviral therapy (ART) during acute HIV infection (AHI) restricts the HIV reservoir, but additional interventions are necessary to induce a cure. Intravenous immunoglobulin (IVIG) is not HIV-specific but is safe and temporarily reduces the HIV reservoir in chronic HIV infection. We present a randomized controlled trial to investigate whether IVIG plus ART in AHI reduces the HIV reservoir and immune activation compared with ART alone. METHODS Ten men with AHI (Fiebig II-IV) initiated ART (tenofovir, entricitabine, ritonavir boosted darunavir and raltegravir) at HIV-1 diagnosis and were randomized to ART alone or ART plus 5 days of IVIG, once virally suppressed (week 19). Blood samples were evaluated for viral reservoir, immune activation, immune exhaustion and microbial translocation. Flexible sigmoidoscopy was performed at weeks 19, 24 and 48, and gut proviral DNA and cell numbers determined. RESULTS IVIG was well tolerated and no viral blips (> 50 HIV-1 RNA copies/mL) occurred during IVIG therapy. From baseline to week 48, total HIV DNA in peripheral blood mononuclear cells (PBMCs) (cases: -3.7 log10 copies/106 CD4 cells; controls: -3.87 log10 copies/106 CD4 cells) declined with no differences observed between the groups (P = 0.49). Declines were observed in both groups from week 19 to week 48 in total HIV DNA in PBMCs (P = 0.38), serum low copy RNA (P = 0.57) and gut total HIV DNA (P = 0.55), but again there were no significant differences between arms. Biomarkers of immune activation, immune exhaustion and microbial translocation and the CD4:CD8 ratio were similar between arms for all comparisons. CONCLUSIONS Although safe, IVIG in AHI did not impact total HIV DNA, immune function or microbial translocation in peripheral blood or gut tissue.
Collapse
|
61
|
Saha A, Goswami G, Mandal S, Mahata A, Midha D, Ahmed R, Agarwal S, Ray S, Das J, Datta S, Sinha S, Chatterjee S. EP-1763: Acute toxicity and in-vivo dosimetry of a two week hypofractionated schedule within the HYPORT study. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)32126-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
62
|
Merkel A, Satayeva A, Cannon F, Howell C, Meikle S, László K, Inglezakis V, Jandosov J, Ray S, Mansurov Z, Mikhalovsky S. Characterisation of Activated Carbons Obtained from Rice Husk. EURASIAN CHEMICO-TECHNOLOGICAL JOURNAL 2017. [DOI: 10.18321/ectj472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Rice husk derived activated carbons doped with nitrogen have been studied using low temperature nitrogen adsorption, scanning electron microscopy, mercury porosimetry, thermogravimetric analysis combined with mass-spectrometry, differential scanning calorimetry and X-ray photoelectron spectroscopy. It has been shown that N-doped activated carbon produced by high temperature treatment of the starting material soaked with urea, has a significantly higher anion exchange capacity than the other samples studied, which correlates with its higher adsorption capacity towards nitrate ion removal from aqueous solutions with the initial concentration of 5 and 15 ppm.
Collapse
|
63
|
Mocciaro G, Ziauddeen N, Nicholson S, Almoosawi S, Ray S. Findings from a UK–Morocco training programme to improve capacity in nutrition surveillance, research and education. Public Health 2017; 142:208-211. [DOI: 10.1016/j.puhe.2016.10.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 09/23/2016] [Accepted: 10/19/2016] [Indexed: 10/20/2022]
|
64
|
McCotter L, Douglas P, Laur C, Gandy J, Fitzpatrick L, Rajput-Ray M, Ray S. Hydration education: developing, piloting and evaluating a hydration education package for general practitioners. BMJ Open 2016; 6:e012004. [PMID: 27927656 PMCID: PMC5168638 DOI: 10.1136/bmjopen-2016-012004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVES To (1) assess the hydration knowledge, attitudes and practices (KAP) of doctors; (2) develop an evidence-based training package; and (3) evaluate the impact of the training package. DESIGN Educational intervention with impact evaluation. SETTING Cambridgeshire, UK. PARTICIPANTS General practitioners (GPs (primary care physicians)). INTERVENTIONS Hydration and healthcare training. MAIN OUTCOME MEASURES Hydration KAP score before and immediately after the training session. RESULTS Knowledge gaps of doctors identified before the teaching were the definition of dehydration, European Food Safety Authority water intake recommendations, water content of the human body and proportion of water from food and drink. A face-to-face teaching package was developed on findings from the KAP survey and literature search. 54 questionnaires were completed before and immediately after two training sessions with GPs. Following the training, total hydration KAP scores increased significantly (p<0.001; median (25th, 75th centiles); 32 (29, 34)). Attendees rated the session as excellent or good (90%) and reported the training was likely to influence their professional practice (100%). CONCLUSIONS The training package will continue to be developed and adapted, with increased focus on follow-up strategies as well as integration into medical curricula and standards of practice. However, further research is required in the area of hydration care to allow policymakers to incorporate hydration awareness and care with greater precision in local and national policies.
Collapse
|
65
|
Barnes K, Crowley J, Laur C, Ball L, Ray S. Proceedings of the Second International Summit on Medical Nutrition Education and Research. Public Health 2016; 140:68-72. [PMID: 27814894 DOI: 10.1016/j.puhe.2016.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 09/01/2016] [Accepted: 09/06/2016] [Indexed: 10/20/2022]
|
66
|
Laur C, Ball L, Ahankari AS, Avdagovska M, Crowley J, Deen D, Douglas P, Hark L, Kohlmeier M, Luzi L, McCotter L, Martyn K, Nowson C, Wall C, Ray S. Proceedings of the inaugural International Summit for Medical Nutrition Education and Research. Public Health 2016; 140:59-67. [PMID: 27726865 DOI: 10.1016/j.puhe.2016.08.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 08/22/2016] [Accepted: 08/25/2016] [Indexed: 10/20/2022]
Abstract
Medical Nutrition Education (MNE) has been identified as an area with potential public health impact. Despite countries having distinctive education systems, barriers and facilitators to effective MNE are consistent across borders, demanding a common platform to initiate global programmes. A shared approach to supporting greater MNE is ideal to support countries to work together. In an effort to initiate this process, the Need for Nutrition Education/Innovation Programme group, in association with their strategic partners, hosted the inaugural International Summit on Medical Nutrition Education and Research on August 8, 2015 in Cambridge, UK. Speakers from the UK, the USA, Canada, Australia, New Zealand, Italy, and India provided insights into their respective countries including their education systems, inherent challenges, and potential solutions across two main themes: (1) Medical Nutrition Education, focused on best practice examples in competencies and assessment; and (2) Medical Nutrition Research, discussing how to translate nutrition research into education opportunities. The Summit identified shared needs across regions, showcased examples of transferrable strategies and identified opportunities for collaboration in nutrition education for healthcare (including medical) professionals. These proceedings highlight the key messages presented at the Summit and showcase opportunities for working together towards a common goal of improvement in MNE to improve public health at large.
Collapse
|
67
|
Laur C, Ball L, Crowley J, Bell H, Maddock J, Ray S. Enhancing breadth of knowledge within multidisciplinary doctoral research: reflections from the Cambridge Generic Nutrition Training course for non-nutritionist postgraduates and professionals. Public Health 2016; 140:35-38. [PMID: 27697293 DOI: 10.1016/j.puhe.2016.08.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 08/23/2016] [Accepted: 08/30/2016] [Indexed: 11/30/2022]
|
68
|
Rugo H, Barve A, Waller C, Bronchud M, Herson J, Yuan J, Manikhas A, Bondarenko I, Mukhametshina G, Nemsadze G, Parra J, Abesamis-Tiambeng M, Baramidze K, Akewanlop C, Vynnychenko I, Sriuranpong V, Mamillapalli G, Ray S, Ruiz EY, Pennella E. Heritage, a phase III safety and efficacy trial of the proposed trastuzumab biosimilar, Myl-1401O vs trastuzumab. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw435.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
69
|
Ray S, Ghosh A, Sinha S. Quantum signature of chaos and thermalization in the kicked Dicke model. Phys Rev E 2016; 94:032103. [PMID: 27739832 DOI: 10.1103/physreve.94.032103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Indexed: 06/06/2023]
Abstract
We study the quantum dynamics of the kicked Dicke model (KDM) in terms of the Floquet operator, and we analyze the connection between chaos and thermalization in this context. The Hamiltonian map is constructed by suitably taking the classical limit of the Heisenberg equation of motion to study the corresponding phase-space dynamics, which shows a crossover from regular to chaotic motion by tuning the kicking strength. The fixed-point analysis and calculation of the Lyapunov exponent (LE) provide us with a complete picture of the onset of chaos in phase-space dynamics. We carry out a spectral analysis of the Floquet operator, which includes a calculation of the quasienergy spacing distribution and structural entropy to show the correspondence to the random matrix theory in the chaotic regime. Finally, we analyze the thermodynamics and statistical properties of the bosonic sector as well as the spin sector, and we discuss how such a periodically kicked system relaxes to a thermalized state in accordance with the laws of statistical mechanics.
Collapse
|
70
|
Sutrisna A, Soebjakto O, Wignall FS, Kaul S, Limnios EA, Ray S, Nguyen NL, Tapsall JW. Increasing resistance to ciprofloxacin and other antibiotics in Neisseria gonorrhoeae from East Java and Papua, Indonesia, in 2004 – implications for treatment. Int J STD AIDS 2016; 17:810-2. [PMID: 17212856 DOI: 10.1258/095646206779307595] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We examined gonococci isolated in 2004, in East Java and Papua, Indonesia, to review the suitability of ciprofloxacin-based and other treatment regimens. Gonococci from the two provinces were tested in Sydney for susceptibility to penicillin, tetracycline, spectinomycin, ceftriaxone, ciprofloxacin, gentamicin, azithromycin and rifampicin. Of 163 gonococcal isolates from East Java (91) and Papua (72), 120 (74%) of gonococci, 62 (68%) and 58 (80%) from East Java and Papua, respectively, were penicillinase-producing gonococci and 162 displayed high-level tetracycline resistance. Eighty-seven isolates (53%) were ciprofloxacin resistant, 44 (48%) from East Java and 43 (60%) from Papua. All isolates were sensitive to cefixime/ceftriaxone, spectinomycin and azithromycin. Minimum inhibitory concentrations of gentamicin were in the range 0.05–8 mg/L. Sixty-nine gonococci (42%) showed combined resistance, to penicillin, tetracycline and quinolones. Quinolone resistance has now reached unacceptable levels, and their use for the treatment of gonorrhoea in Indonesia should be reconsidered.
Collapse
|
71
|
Yang L, Low D, Lee P, Ruan D, Chin R, Kaprealian T, Kamrava M, Kupelian P, Beron P, Steinberg M, Chen A, Agazaryan N, Ray S, Qi X. SU-F-J-181: An Alternative Patient Alignment Tool On TomoTherapy: The First In- Human Megavoltage-Topogram Acquisition. Med Phys 2016. [DOI: 10.1118/1.4956089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
72
|
Ray S, Iyer A, Avula S, Kneen R. Acquired torticollis due to primary pyomyositis of the paraspinal muscles in an 11-year-old boy. BMJ Case Rep 2016; 2016:bcr-2015-213409. [PMID: 26994045 DOI: 10.1136/bcr-2015-213409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Torticollis is characterised by tilting and rotation of the cervical spine in opposite directions. Causes can be congenital or acquired. Primary pyomyositis is a rare subacute deep bacterial infection of skeletal muscles that typically affects individuals under 20 years of age from tropical countries. Infrequently, pyomyositis occurs in individuals from temperate regions, usually in immunocompromised adults, and this is defined as secondary pyomyositis. We report a case of acquired torticollis due to primary pyomyositis of the paraspinal muscles in a previously healthy boy from the UK. A prolonged course of antibiotics and physiotherapy led to a complete resolution of his illness. We review how to differentiate pyomyositis from focal myositis, a more common inflammatory muscular cause of acquired torticollis.
Collapse
|
73
|
Ghosh I, Mallick I, Ray S. Feasibility and efficacy of salvage radiotherapy with concurrent weekly topotecan in recurrent primitive neuroectodermal tumor. Indian J Cancer 2016; 52:25-6. [PMID: 26837963 DOI: 10.4103/0019-509x.175587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
74
|
Chakravarti HN, Ray S, Chakrabarti SK, Biswas D, Ghosh S, Mukhopadhyay S, Chowdhury S. Bardet-Biedl syndrome in two siblings: a rare entity revisited. QJM 2016; 109:123-4. [PMID: 26025693 DOI: 10.1093/qjmed/hcv114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
75
|
Ruiz-Fuertes J, Gomis O, León-Luis SF, Schrodt N, Manjón FJ, Ray S, Santamaría-Pérez D, Sans JA, Ortiz HM, Errandonea D, Ferrer-Roca C, Segura A, Martínez-García D, Lavín V, Rodríguez-Mendoza UR, Muñoz A. Pressure-induced amorphization of YVO₄:Eu³⁺ nanoboxes. NANOTECHNOLOGY 2016; 27:025701. [PMID: 26618997 DOI: 10.1088/0957-4484/27/2/025701] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A structural transformation from the zircon-type structure to an amorphous phase has been found in YVO4:Eu(3+) nanoboxes at high pressures above 12.7 GPa by means of x-ray diffraction measurements. However, the pair distribution function of the high-pressure phase shows that the local structure of the amorphous phase is similar to the scheelite-type YVO4. These results are confirmed both by Raman spectroscopy and Eu(3+) photoluminescence which detect the phase transition to a scheelite-type structure at 10.1 and 9.1 GPa, respectively. The irreversibility of the phase transition is observed with the three techniques after a maximum pressure in the upstroke of around 20 GPa. The existence of two (5)D0-->(7)F0 photoluminescence peaks confirms the existence of two local environments for Eu(3+), at least for the low-pressure phase. One environment is the expected for substituting Y(3+) and the other is likely a disordered environment possibly found at the surface of the nanoboxes.
Collapse
|