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Dull M, Kuper K, Bush S, Ray D, Jones J. 286: Clinical Teaching In a Busy Emergency Department: Interruptions During Case Presentations. Ann Emerg Med 2010. [DOI: 10.1016/j.annemergmed.2010.06.336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cryan JP, Glownia JM, Andreasson J, Belkacem A, Berrah N, Blaga CI, Bostedt C, Bozek J, Buth C, DiMauro LF, Fang L, Gessner O, Guehr M, Hajdu J, Hertlein MP, Hoener M, Kornilov O, Marangos JP, March AM, McFarland BK, Merdji H, Petrović VS, Raman C, Ray D, Reis D, Tarantelli F, Trigo M, White JL, White W, Young L, Bucksbaum PH, Coffee RN. Auger electron angular distribution of double core-hole states in the molecular reference frame. PHYSICAL REVIEW LETTERS 2010; 105:083004. [PMID: 20868096 DOI: 10.1103/physrevlett.105.083004] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Indexed: 05/29/2023]
Abstract
The Linac Coherent Light Source free electron laser is a source of high brightness x rays, 2×10(11) photons in a ∼5 fs pulse, that can be focused to produce double core vacancies through rapid sequential ionization. This enables double core vacancy Auger electron spectroscopy, an entirely new way to study femtosecond chemical dynamics with Auger electrons that probe the local valence structure of molecules near a specific atomic core. Using 1.1 keV photons for sequential x-ray ionization of impulsively aligned molecular nitrogen, we observed a rich single-site double core vacancy Auger electron spectrum near 413 eV, in good agreement with ab initio calculations, and we measured the corresponding Auger electron angle dependence in the molecular frame.
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Glownia JM, Cryan J, Andreasson J, Belkacem A, Berrah N, Blaga CI, Bostedt C, Bozek J, DiMauro LF, Fang L, Frisch J, Gessner O, Gühr M, Hajdu J, Hertlein MP, Hoener M, Huang G, Kornilov O, Marangos JP, March AM, McFarland BK, Merdji H, Petrovic VS, Raman C, Ray D, Reis DA, Trigo M, White JL, White W, Wilcox R, Young L, Coffee RN, Bucksbaum PH. Time-resolved pump-probe experiments at the LCLS. OPTICS EXPRESS 2010; 18:17620-30. [PMID: 20721148 DOI: 10.1364/oe.18.017620] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The first time-resolved x-ray/optical pump-probe experiments at the SLAC Linac Coherent Light Source (LCLS) used a combination of feedback methods and post-analysis binning techniques to synchronize an ultrafast optical laser to the linac-based x-ray laser. Transient molecular nitrogen alignment revival features were resolved in time-dependent x-ray-induced fragmentation spectra. These alignment features were used to find the temporal overlap of the pump and probe pulses. The strong-field dissociation of x-ray generated quasi-bound molecular dications was used to establish the residual timing jitter. This analysis shows that the relative arrival time of the Ti:Sapphire laser and the x-ray pulses had a distribution with a standard deviation of approximately 120 fs. The largest contribution to the jitter noise spectrum was the locking of the laser oscillator to the reference RF of the accelerator, which suggests that simple technical improvements could reduce the jitter to better than 50 fs.
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Singh H, Cheema PS, Mishra AK, Tewari AK, Rao JR, Ravindran R, Ray D, Bansal GC. β-Tubulin Gene Based PCR-RFLP Method for Specific Detection of Babesia bigeminaand Theileria annulataIsolates. JOURNAL OF APPLIED ANIMAL RESEARCH 2010. [DOI: 10.1080/09712119.2010.9707131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Daunton A, Liu D, Collins SI, Pope A, Barton D, Ray D, James ND. Novel uses of coded data in clinical trials. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Singh KP, He F, Ranitovic P, Cao W, De S, Ray D, Chen S, Thumm U, Becker A, Murnane MM, Kapteyn HC, Litvinyuk IV, Cocke CL. Control of electron localization in deuterium molecular ions using an attosecond pulse train and a many-cycle infrared pulse. PHYSICAL REVIEW LETTERS 2010; 104:023001. [PMID: 20366590 DOI: 10.1103/physrevlett.104.023001] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Indexed: 05/29/2023]
Abstract
We demonstrate an experimental control of electron localization in deuterium molecular ions created and dissociated by the combined action of an attosecond pulse train and a many-cycle infrared (IR) pulse. The attosecond pulse train is synthesized using both even and odd high order harmonics of the driving IR frequency so that it can strobe the IR field once per IR cycle. An asymmetric ejection of the deuterium ions oscillates with the full IR period when the APT-IR time-delay is scanned. The observed control is due to the creation of a coherent superposition of 1s sigma{g} and 2p sigma{u} states via interference between one-photon and two-photon dissociation channels.
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Ray D, He F, De S, Cao W, Mashiko H, Ranitovic P, Singh KP, Znakovskaya I, Thumm U, Paulus GG, Kling MF, Litvinyuk IV, Cocke CL. Ion-energy dependence of asymmetric dissociation of D2 by a two-color laser field. PHYSICAL REVIEW LETTERS 2009; 103:223201. [PMID: 20366092 DOI: 10.1103/physrevlett.103.223201] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Indexed: 05/21/2023]
Abstract
Two-color (800 and 400 nm) short (45 fs) linearly polarized pulses are used to ionize and dissociate D2 into a neutral deuterium atom and a deuteron. The yields and energies of the ions are measured left and right along the polarization vector. As the relative phase of the two colors is varied, strong yield asymmetries are found in the ion-energy regions traditionally identified as bond softening, above-threshold dissociation and rescattering. The asymmetries in these regions are quite different. A model based on the dynamic coupling by the laser field of the gerade and ungerade states in the molecular ion accounts for many of the observed features.
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De S, Znakovskaya I, Ray D, Anis F, Johnson NG, Bocharova IA, Magrakvelidze M, Esry BD, Cocke CL, Litvinyuk IV, Kling MF. Field-free orientation of CO molecules by femtosecond two-color laser fields. PHYSICAL REVIEW LETTERS 2009; 103:153002. [PMID: 19905632 DOI: 10.1103/physrevlett.103.153002] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2009] [Indexed: 05/12/2023]
Abstract
We report the first experimental observation of nonadiabatic field-free orientation of a heteronuclear diatomic molecule (CO) induced by an intense two-color (800 and 400 nm) femtosecond laser field. We monitor orientation by measuring fragment ion angular distributions after Coulomb explosion with an 800 nm pulse. The orientation of the molecules is controlled by the relative phase of the two-color field. The results are compared to quantum mechanical rigid rotor calculations. The demonstrated method can be applied to study molecular frame dynamics under field-free conditions in conjunction with a variety of spectroscopy methods, such as high-harmonic generation, electron diffraction, and molecular frame photoelectron emission.
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Gilmer M, Wiliams A, Ray D, Jones J. 226: Nonaneurysmal Subarachnoid Hemorrhage: Clinical Course and Outcome in Two Distinct Hemorrhage Patterns. Ann Emerg Med 2009. [DOI: 10.1016/j.annemergmed.2009.06.255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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James N, Pascoe J, Zachariah A, Ray D, Oldroyd A, Parry H, Benghiat H, Karina M, Collins S, Porfiri E. Effect of the UK postcode lottery on survival of patients with metastatic renal cancer: an audit of outcomes in patients with metastatic renal cancer suitable for treatment with tyrosine kinase inhibitors. Clin Oncol (R Coll Radiol) 2009; 21:610-6. [PMID: 19695849 DOI: 10.1016/j.clon.2009.06.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2008] [Revised: 05/13/2009] [Accepted: 06/23/2009] [Indexed: 11/29/2022]
Abstract
AIMS To determine whether primary care trusts' agreement or refusal to fund sorafenib or sunitinib affects outcomes for patients with metastatic renal cell carcinoma. MATERIALS AND METHODS This retrospective audit was conducted in a tertiary referral centre for urological cancer. Requests to prescribe drugs not approved by the National Institute for Health and Clinical Excellence are recorded on a trust database. We obtained details of all requests made for sunitinib and sorafenib for patients with renal cell carcinoma since licence in 2006. Outcome measures analysed were overall survival measured from the date of request for funding and hospital resource use as measured from Payment by Results data. Known prognostic factors and the patient's Index of Multiple Deprivation score were assessed at baseline as potential confounders of survival difference. RESULTS Seventy-nine patients were identified. The groups were similar with respect to prognostic factors and Index of Multiple Deprivation scores. Thirty-seven and eight patients had funding approved for sunitinib and sorafenib, respectively; 21 and 13 were turned down. Seven patients who were denied funding received one or other of these drugs by self-funding treatment. Survival was longer for patients who received treatment with a drug for which they had applied for funding than for those who did not (hazards ratio 0.46; 95% confidence interval 0.21-1.01; chi(2)=3.80; 1 d.f.; P=0.05); the advantage was similar for patients receiving sunitinib (hazards ratio=0.49; 95% confidence interval 0.18-1.36; chi(2)=1.86; 1 d.f.; P=0.17) and sorafenib (hazard ratio=0.44; 95% confidence interval 0.11-1.69; chi(2)=1.58; 1 d.f.; P=0.21). Overall National Health Service resource use apart from funding for the renal cancer drugs was similar for both groups. CONCLUSIONS Compared with patients receiving treatment, patients denied access to sunitinib and sorafenib had substantially worse survival outcomes, despite receiving treatment from the same clinical team. Access to the new drugs did not have an effect on overall use of National Health Service resources by funded patients. Modern treatments for advanced renal cancer should be available to all National Health Service patients with the disease.
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Rebeyrol C, Guillot L, Saint-Criq V, Ray D, Clement A, Tabary O, Le Rouzic P. Weak anti-inflammatory effects of glucocorticoids on CF bronchial epithelial cells. J Cyst Fibros 2009. [DOI: 10.1016/s1569-1993(09)60216-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pagano D, Freemantle N, Bridgewater B, Howell N, Ray D, Jackson M, Fabri BM, Au J, Keenan D, Kirkup B, Keogh BE. Social deprivation and prognostic benefits of cardiac surgery: observational study of 44 902 patients from five hospitals over 10 years. BMJ 2009; 338:b902. [PMID: 19342410 PMCID: PMC2664869 DOI: 10.1136/bmj.b902] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To assess the effects of social deprivation on survival after cardiac surgery and to examine the influence of potentially modifiable risk factors. DESIGN Analysis of prospectively collected data. Prognostic models used to examine the additional effect of social deprivation on the end points. SETTING Birmingham and north west England. PARTICIPANTS 44 902 adults undergoing cardiac surgery, 1997-2007. MAIN OUTCOME MEASURES Social deprivation with census based 2001 Carstairs scores. All cause mortality in hospital and at mid-term follow-up. RESULTS In hospital mortality for all cardiac procedures was 3.25% and mid-term follow-up (median 1887 days; range 1180-2725 days) mortality was 12.4%. Multivariable analysis identified social deprivation as an independent predictor of mid-term mortality (hazard ratio 1.024, 95% confidence interval 1.015 to 1.033; P<0.001). Smoking (P<0.001), body mass index (BMI, P<0.001), and diabetes (P<0.001) were associated with social deprivation. Smoking at time of surgery (1.294, 1.191 to 1.407, P<0.001) and diabetes (1.305, 1.217 to 1.399, P<0.001) were independent predictors of mid-term mortality. The relation between BMI and mid-term mortality was non-linear and risks were higher in the extremes of BMI (P<0.001). Adjustment for smoking, BMI, and diabetes reduced but did not eliminate the effects of social deprivation on mid-term mortality (1.017, 1.007 to 1.026, P<0.001). CONCLUSIONS Smoking, extremes of BMI, and diabetes, which are potentially modifiable risk factors associated with social deprivation, are responsible for a significant reduction in survival after surgery, but even after adjustment for these variables social deprivation remains a significant independent predictor of increased risk of mortality.
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Matthews L, Berry A, Tersigni M, D’Acquisto F, Ianaro A, Ray D. Thiazolidinediones are partial agonists for the glucocorticoid receptor. Endocrinology 2009; 150:75-86. [PMID: 18801908 PMCID: PMC4110506 DOI: 10.1210/en.2008-0196] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Although thiazolidinediones were designed as specific peroxisome proliferator-activated receptor (PPAR)-gamma-ligands, there is evidence for some off-target effects mediated by a non-PPARgamma mechanism. Previously we have shown that rosiglitazone has antiinflammatory actions not explicable by activation of PPARgamma,but possibly by the glucocorticoid receptor (GR). Rosiglitazone induces nuclear translocation both of GR-green fluorescent protein, and endogenous GR in HeLa and U20S cells but with slower kinetics than dexamethasone. Rosiglitazone also induces GR phosphorylation (Ser211), a GR ligand-binding-specific effect. Rosiglitazone drives luciferase expression from a simple glucocorticoid-response element containing reporter gene in a GR-dependent manner (EC50 4 microm), with a similar amplitude response to the partial GR agonist RU486. Rosiglitazone also inhibits dexamethasone-driven reporter gene activity (IC50 2.9 microm) in a similar fashion to RU486, suggesting partial agonist activity. Importantly we demonstrate a similar effect in PPARgamma-null cells, suggesting both GR dependence and PPARgamma independence. Rosiglitazone also activates a GAL4-GR chimera, driving a upstream activating sequence promoter, demonstrating DNA template sequence independence and furthermore enhanced steroid receptor coactivator-1-GR interaction, measured by a mammalian two-hybrid assay. Both ciglitazone and pioglitazone, structurally related to rosiglitazone, show similar effects on the GR. The antiproliferative effect of rosiglitazone is increased in U20S cells that overexpress GR, suggesting a biologically important GR-dependent component of rosiglitazone action. Rosiglitazone is a partial GR agonist, affecting GR activation and trafficking to influence engagement of target genes and affect cell function. This novel mode of action may explain some off-target effects observed in vivo. Additionally, antagonism of glucocorticoid action may contribute to the antidiabetic actions of rosiglitazone.
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Rebeyrol C, Saint-Criq V, Bonvin E, Guillot L, Ray D, Tabary O, Clement A, Le Rouzic P. Glucocorticoids resistance in Cystic Fibrosis. Rev Mal Respir 2008. [DOI: 10.1016/s0761-8425(08)75051-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Davies KA, Macfarlane GJ, Nicholl BI, Dickens C, Morriss R, Ray D, McBeth J. Restorative sleep predicts the resolution of chronic widespread pain: results from the EPIFUND study. Rheumatology (Oxford) 2008; 47:1809-13. [PMID: 18842606 PMCID: PMC2582170 DOI: 10.1093/rheumatology/ken389] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Objectives. Poor sleep is associated with chronic widespread pain (CWP). Conversely, good-quality sleep may play a role in the resolution of pain symptoms. Sleep is a multidimensional construct, comprising a number of diverse components. The aims of the current study were to examine the hypotheses that: (i) good sleep quality would predict the resolution of CWP, (ii) restorative sleep would predict the resolution of CWP and (iii) that these relationships would be independent of confounding psychological factors. Methods. Subjects in a population-based prospective study completed a pain questionnaire at baseline from which subjects with CWP were identified. Baseline sleep was measured using the Estimation of Sleep Problems Scale which measures sleep onset, maintenance, early wakening and restorative sleep. The questionnaire also contained scales examining psychosocial status. Subjects were followed up 15 months later and pain status was assessed. Results. A total of 1061 subjects reported CWP at baseline of whom 679 (75% of eligible subjects) responded at follow-up. Of those, a total of 300 (44%) no longer satisfied criteria for CWP. Univariate analysis revealed that three of the four sleep components were associated with the resolution of CWP: rapid sleep onset, odds ratio (OR) = 1.7, 95% CI 1.2, 2.5; absence of early wakening, OR = 1.6, 95% CI 1.1, 2.4; and restorative sleep, OR = 2.7, 95% CI 1.5, 4.8. After adjusting for the effect of psychosocial factors, which may have confounded the relationship, only restorative sleep (OR = 2.0, 95% CI 1.02, 3.8) was associated. Conclusions. Self-reported restorative sleep was independently associated with the resolution of CWP and return to musculoskeletal health.
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Bandyopadhyay D, Gupta S, Banerjee S, Gupta S, Ray D, Bhattacharya S, Bhattacharya B. Adenosine deaminase estimation and multiplex polymerase chain reaction in diagnosis of extra-pulmonary tuberculosis. Int J Tuberc Lung Dis 2008; 12:1203-1208. [PMID: 18812052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
SETTING Extra-pulmonary tuberculosis (EPTB), including mycobacteriosis, contributes 15-20% of all tuberculosis (TB) cases. The diagnosis of EPTB remains elusive because of the inadequate sensitivity of routine and conventional bacteriological methods for the detection of Mycobacterium tuberculosis and related organisms in clinical specimens such as cerebrospinal fluid (CSF), pleural fluid and peritoneal fluid. OBJECTIVE To develop a better diagnostic marker for EPTB. DESIGN In our study, 179 cases of EPTB were analysed for acid-fast bacilli (AFB) smear, adenosine deaminase activity (ADA) and multiplex polymerase chain reaction (PCR). Although estimation of ADA is helpful, its sensitivity and specificity varies widely. On the other hand, a multiplex PCR using amplicons such as IS6110, dnaJ gene and hsp65 genes has high sensitivity (60-88%) and specificity (81-100%). RESULTS On comparing AFB and ADA results with PCR, the PCR is clearly more effective than AFB (P < 0.001) and ADA estimation (P < 0.02) in CSF. The same result was observed with peritoneal fluid (P < 0.001 vs. P < 0.05) and pleural fluid (P < 0.001 and P < 0.05). CONCLUSION The study shows that multiplex PCR remains the best tool and is a much better marker for diagnosing EPTB.
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Biswas AB, Chakraborty I, Das DK, Chakraborty A, Ray D, Mitra K. Elimination of iodine deficiency disorders--current status in Purba Medinipur district of West Bengal, India. Indian J Public Health 2008; 52:130-135. [PMID: 19189834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Towards sustainable elimination of iodine deficiency disorders (IDD), the existing programme needs to be monitored through recommended methods and indicators. Thus, we conducted the study to assess the current status of IDD in Purba Medinipur district, West Bengal. METHODS It was a community based cross-sectional study; undertaken from October 2006-April 2007. 2400 school children, aged 8-10 years were selected by '30 cluster' sampling technique. Indicators recommended by the WHO/UNICEF/ICCIDD were used. Subjects were clinically examined by standard palpation technique for goitre, urinary iodine excretion was estimated by wet digestion method and salt samples were tested by spot iodine testing kit. RESULTS The total goitre rate (TGR) was 19.7% (95% CI = 18.1-21.3 %) with grade I and grade II (visible goitre) being 16.7% and 3% respectively. Goitre prevalence did not differ by age but significant difference was observed in respect of sex. Median urinary iodine excretion level was 11.5 mcg/dL and none had value less than 5 mcg/dL. Only 50.4% of the salt samples tested were adequately iodised (> or = 15 ppm). CONCLUSION The district is in a phase of transition from iodine deficiency to iodine sufficiency as evident from the high goitre prevalence (19.7%) and median urinary iodine excretion (11.5 mcg/dL) within optimum limit. But, salt iodisation level far below the recommended goal highlights the need for intensified efforts towards successful transition.
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Hensing TA, Subramanian H, Roy HK, Breault D, Bogojevic Z, Ray D, Hasabou N, Backman V. Identification of malignancy-associated change in buccal mucosa with partial wave spectroscopy (PWS): A potential biomarker for lung cancer risk. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.11045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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McArdle KA, Ray D. ‘Haematuria’: A case of mistaken identity. Scott Med J 2008. [DOI: 10.1258/rsmsmj.53.2.66a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Although haematuria is the commonest cause of red urine, it is important to recognise that it is not the only cause. We report the case of a 62 year old lady with a prosthetic heart valve who presented to the haematuria service with red urine resulting from haemolysis secondary to a peri-valvular leak.
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Ray D, Ulrich B, Bocharova I, Maharjan C, Ranitovic P, Gramkow B, Magrakvelidze M, De S, Litvinyuk IV, Le AT, Morishita T, Lin CD, Paulus GG, Cocke CL. Large-angle electron diffraction structure in laser-induced rescattering from rare gases. PHYSICAL REVIEW LETTERS 2008; 100:143002. [PMID: 18518027 DOI: 10.1103/physrevlett.100.143002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Indexed: 05/26/2023]
Abstract
We have measured full momentum images of electrons rescattered from Xe, Kr, and Ar following the liberation of the electrons from these atoms by short, intense laser pulses. At high momenta the spectra show angular structure (diffraction) which is very target dependent and in good agreement with calculated differential cross sections for the scattering of free electrons from the corresponding ionic cores.
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Matthews L, Berry A, Ohanian V, Ohanian J, Garside H, Ray D. Caveolin mediates rapid glucocorticoid effects and couples glucocorticoid action to the antiproliferative program. Mol Endocrinol 2008; 22:1320-30. [PMID: 18308897 DOI: 10.1210/me.2007-0154] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Many glucocorticoid (Gc) actions are of rapid onset and therefore require acute regulation of intracellular signaling cascades. Integration of diverse extracellular signals requires cross-talk between intracellular pathways, suggesting the existence of nodes for signal interaction, such as the specialized membrane microdomains caveolae. We have identified rapid Gc-dependent phosphorylation of caveolin, and protein kinase B (PKB)/Akt, in the lung epithelial cell line A549 and found this was dependent on src kinases. There was also activation of PKB downstream molecules glycogen synthase kinase-3beta, and mammalian target of rapamycin. Subcellular fractionation colocalized glucocorticoid receptor (GR) and c-src to caveolin-containing membrane fractions. Coimmunoprecipitation studies also identified interactions between GR and caveolin and suggested that the activation function 1 domain within the GR may serve to support an interaction between GR and caveolin. Disruption of lipid raft formation, impairment of caveolin function using dominant-negative caveolin, down-regulation of caveolin-1 using short hairpin RNA or complete ablation of caveolin-1 prevented Gc-induced activation of PKB. Loss of caveolin-1 also prevents Gc activation of glycogen synthase kinase-3beta and mammalian target of rapamycin. In contrast, caveolin interference/down-regulation had no effect on Gc transactivation. Functional analysis of caveolin-1 knockdown and knockout cells identified profound loss of Gc-mediated growth inhibition compared with controls, with a requirement for caveolin in order for Gc to regulate cell cycle progression. Therefore, disruption of caveolae leads to dissociation of Gc action, with impaired induction of PKB activation, and cell growth inhibition, but with negligible effects on Gc transactivation. These observations have implications for understanding the diverse physiological actions of Gc.
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Mohapatra R, Ray D, Swain AK, Pal TK, Sahoo PK. Release study of alfuzosin hydrochloride loaded to novel hydrogel P(HEMA-co-AA). J Appl Polym Sci 2008. [DOI: 10.1002/app.27089] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Shippey B, Ray D, McKeown D. Use of the McGrath ® videolaryngoscope in the management of difficult and failed tracheal intubation. Br J Anaesth 2008; 100:116-9. [DOI: 10.1093/bja/aem303] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Balasubramaniam J, Bindu K, Rao VU, Ray D, Haldar R, Brzeczko AW. Effect of Superdisintegrants on Dissolution of Cationic Drugs. DISSOLUT TECHNOL 2008. [DOI: 10.14227/dt150208p18] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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100
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Ravindran R, Saravanan BC, Rao JR, Mishra AK, Bansal GC, Ray D. A PCR-RFLP Method for Specific Detection ofTheileria annulata. JOURNAL OF APPLIED ANIMAL RESEARCH 2007. [DOI: 10.1080/09712119.2007.9706858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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