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Berbeco R, Korideck H, Kumar R, Sridhar S, Detappe A, Ngwa W, Makrigiorgos M. Targeted Gold Nanoparticles as Vascular Disrupting Agents During Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.743] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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102
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Ngwa W, Altundal Y, Korideck H, Kumar R, Sridhar S, Cormack R, Makrigiorgos M. Radiation Therapy Biomaterials for Response Assessment and Nodal Detection (Brand). Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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103
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Roy A, Eisenhut M, Harris RJ, Rodrigues LC, Sridhar S, Habermann S, Snell L, Mangtani P, Adetifa I, Lalvani A, Abubakar I. Effect of BCG vaccination against Mycobacterium tuberculosis infection in children: systematic review and meta-analysis. BMJ 2014; 349:g4643. [PMID: 25097193 PMCID: PMC4122754 DOI: 10.1136/bmj.g4643] [Citation(s) in RCA: 339] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To determine whether BCG vaccination protects against Mycobacterium tuberculosis infection as assessed by interferon γ release assays (IGRA) in children. DESIGN Systematic review and meta-analysis. Searches of electronic databases 1950 to November 2013, checking of reference lists, hand searching of journals, and contact with experts. SETTING Community congregate settings and households. INCLUSION CRITERIA Vaccinated and unvaccinated children aged under 16 with known recent exposure to patients with pulmonary tuberculosis. Children were screened for infection with M tuberculosis with interferon γ release assays. DATA EXTRACTION Study results relating to diagnostic accuracy were extracted and risk estimates were combined with random effects meta-analysis. RESULTS The primary analysis included 14 studies and 3855 participants. The estimated overall risk ratio was 0.81 (95% confidence interval 0.71 to 0.92), indicating a protective efficacy of 19% against infection among vaccinated children after exposure compared with unvaccinated children. The observed protection was similar when estimated with the two types of interferon γ release assays (ELISpot or QuantiFERON). Restriction of the analysis to the six studies (n=1745) with information on progression to active tuberculosis at the time of screening showed protection against infection of 27% (risk ratio 0.73, 0.61 to 0.87) compared with 71% (0.29, 0.15 to 0.58) against active tuberculosis. Among those infected, protection against progression to disease was 58% (0.42, 0.23 to 0.77). CONCLUSIONS BCG protects against M tuberculosis infection as well as progression from infection to disease.Trial registration PROSPERO registration No CRD42011001698 (www.crd.york.ac.uk/prospero/).
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Madhumala M, Madhavi D, Sankarshana T, Sridhar S. Recovery of hydrochloric acid and glycerol from aqueous solutions in chloralkali and chemical process industries by membrane distillation technique. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2014.02.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Cormack R, Ngwa W, Tangutoori S, Rajiv K, Sridhar S, Makrigiorgos G. SU-F-19A-08: Optimal Time Release Schedule of In-Situ Drug Release During Permanent Prostate Brachytherapy. Med Phys 2014. [DOI: 10.1118/1.4889034] [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
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106
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Tangutoori S, Korideck H, Kumar R, Sridhar S, Makrigiorgos G, Cormack R. WE-G-BRE-08: Radiosensitization by Olaparib Eluting Nanospheres. Med Phys 2014. [DOI: 10.1118/1.4889483] [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
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107
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Sasmal P, Jaleel M, Rao P, Munikumar M, Bhattacharya M, Kumar N, Neelima P, Rawoof K, Rao P, Abbineni C, Roshaiah M, Sridhar S, Kumar T, Vinu M, Potluri V, Misra P, Talwar R, Das S. Novel 4-Oxothienopyrimidinyl Propanoic Acid Derivatives as AMPActivated Protein Kinase (AMPK) Activators. LETT DRUG DES DISCOV 2014. [DOI: 10.2174/1570180811666140122003044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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108
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Sridhar S, Ge L, Tiwary CS, Hart AC, Ozden S, Kalaga K, Lei S, Sridhar SV, Sinha RK, Harsh H, Kordas K, Ajayan PM, Vajtai R. Enhanced field emission properties from CNT arrays synthesized on Inconel superalloy. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1986-1991. [PMID: 24417432 DOI: 10.1021/am405026y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
One of the most promising materials for fabricating cold cathodes for next generation high-performance flat panel devices is carbon nanotubes (CNTs). For this purpose, CNTs grown on metallic substrates are used to minimize contact resistance. In this report, we compare properties and field emission performance of CNTs grown via water assisted chemical vapor deposition using Inconel vs silicon (Si) substrates. Carbon nanotube forests grown on Inconel substrates are superior to the ones grown on silicon; low turn-on fields (∼1.5 V/μm), high current operation (∼100 mA/cm(2)) and very high local field amplification factors (up to ∼7300) were demonstrated, and these parameters are most beneficial for use in vacuum microelectronic applications.
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Berbeco R, Korideck H, Kumar R, Sridhar S, Makrigiorgos M. 20: Targeted Gold Nanoparticles as Vascular Disrupting Agents during Radiotherapy. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)34041-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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110
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Karthigayani P, Sridhar S. DECISION TREE BASED OCCLUSION DETECTION IN FACE RECOGNITION AND ESTIMATION OF HUMAN AGE USING BACK PROPAGATION NEURAL NETWORK. ACTA ACUST UNITED AC 2014. [DOI: 10.3844/jcssp.2014.115.127] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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111
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Beverley PCL, Sridhar S, Lalvani A, Tchilian EZ. Harnessing local and systemic immunity for vaccines against tuberculosis. Mucosal Immunol 2014; 7:20-6. [PMID: 24253104 DOI: 10.1038/mi.2013.99] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 10/09/2013] [Accepted: 10/14/2013] [Indexed: 02/06/2023]
Abstract
The lung is the portal of entry for Mycobacterium tuberculosis (Mtb) and animal experimental evidence indicates that local immune defense mechanisms are crucial for protective immunity. Immunization via the lower respiratory tract efficiently induces a dividing, activated, antigen-dependent, lung-resident, memory T-cell population, which is partly recoverable by bronchoalveolar lavage. These cells can inhibit the growth of Mtb in the lungs immediately after infection. Delivery of appropriate signals to the lung innate immune system is critical for induction of effective local immunity. In contrast after parenteral immunization, antigen-specific cells may be found in lung tissue but few are recoverable by lavage and inhibition of mycobacterial growth is delayed. Harnessing both local and systemic immunity can provide highly effective protection in animal models and the evidence suggests that taken in aggregate, multiple animal models may predict the success of novel vaccine strategies in humans.
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Jackson C, Southern J, Whitworth HS, Scott M, Tsou CY, Sridhar S, Nikolayevskyy V, Lipman M, Sitch A, Deeks J, Griffiths C, Drobniewski F, Lalvani A, Abubakar I. S57 Diabetes and latent tuberculosis infection: nested case-control study within the PREDICT cohort. Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.64] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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113
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Karnani N, Sridhar S, Connell D, Lalvani A. S60 Risk factors associated with mycobacterium tuberculosis (MTB) infection and progression to active TB disease in child contacts. Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
UNLABELLED Pheochromocytomas or Paragangliomas are neroendocrine tumors elaborating catecholamines. They may not present always in a classic manner and a high degree of suspicion is important in diagnosing them early. They can grow large enough to impinge on the great vessels and yet symptoms may not indicate the severity until late. A young African 32 year old Male presented with occasional headaches, moderate weight loss, abdominal pain and hypertension for three years. On investigation for hypertension a large paraganglioma was discovered wrapped around the Aorta and vena cava. He was operated successfully after preoperative preparation and was discharged normotensive. CONCLUSION Young hypertensive should always be worked up fully including checking for abdominal masses. The classic paroxysm was absent in this case. After surgical removal the catecholamines elaborated by the tumor also take time to be washed out of the circulation thus the blood pressure will need careful monitoring. Conventional alpha blockage first and beta blockage later was the algorithm followed but choice of agent was also discussed with nesthethesiologist. Though classically taught phenoxy benzamine is used, in this case it was not used and a combination of Prazosin and Propranolol.
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Ramaiah KP, Satyasri D, Sridhar S, Krishnaiah A. Removal of hazardous chlorinated VOCs from aqueous solutions using novel ZSM-5 loaded PDMS/PVDF composite membrane consisting of three hydrophobic layers. JOURNAL OF HAZARDOUS MATERIALS 2013; 261:362-371. [PMID: 23959256 DOI: 10.1016/j.jhazmat.2013.07.048] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 07/15/2013] [Accepted: 07/23/2013] [Indexed: 06/02/2023]
Abstract
Hydrophobic polymer possesses significant potential for selective separation of volatile organic compounds (VOCs) from their aqueous solutions by pervaporation (PV). In the present study mixed matrix hydrophobic membranes of polydimethylsiloxane (PDMS) supported on polyvinylidenefluoride (PVDF) substrate were synthesized by incorporating hydrophobic inorganic ZSM-5 filler. The indigenous membranes were crosslinked with tetraethylorthosilicate (TEOS) for the extraction of volatile chlorinated hydrocarbons such as dichloromethane (DCM), trichloromethane (TCM), 1,2-dichloroethane (DCE), and 1,1,2,2-tetrachloroethane (TeCE), which pose serious environment threat and health hazard. Thermal stability, crosslinking, crystallinity, surface morphology and swelling characteristics of the indigenously developed membranes were determined by TGA, FTIR, XRD, SEM and sorption studies, respectively. Effect of operating parameters such as feed composition and filler concentration on separation performance in terms of flux and selectivity were determined. Flux of DCM, TCM, DCE and TeCE was found to be 0.166, 0.146, 0.141 and 0.06 kg m(-2)h(-1) with selectivity of 541, 1068, 917 and 15,000, respectively, for 20% ZSM-5 filled PDMS membrane for aqueous feeds containing 1.33% (w/v) DCM, 0.8% (w/v) TCM, 0.84% (w/v) DCE and 0.28% (w/v) TeCE in water. The membrane exhibited considerable feasibility for scale-up with significant potential for removal of hazardous chlorinated VOCs from aqueous solutions.
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Ngwa W, Korideck H, Kumar R, Sridhar S, David K, Paul N, Berbeco R, Cormack R, Makrigiorgos G. Toward Customizable Radiation Therapy Enhancement (CuRE) With Gold Nanoparticles Released, In Situ, From Gold-Loaded Brachytherapy Spacers. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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117
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Rivera-Chacon DM, Alvarado-Velez M, Acevedo-Morantes CY, Singh SP, Gultepe E, Nagesha D, Sridhar S, Ramirez-Vick JE. Fibronectin and vitronectin promote human fetal osteoblast cell attachment and proliferation on nanoporous titanium surfaces. J Biomed Nanotechnol 2013; 9:1092-7. [PMID: 23858975 DOI: 10.1166/jbn.2013.1601] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Improvements in osteoconduction of implant biomaterials require focusing on the bone-implant interface, which is a complex multifactorial system. Surface topography of implants plays a crucial role at this interface. Nanostructured surfaces have been shown to promote serum protein adsorption and osteoblast adhesion when compared to micro-structured surfaces for bone-implant materials. We studied the influence of the serum proteins fibronectin and vitronectin on the attachment and proliferation of osteoblasts onto nanostructured titania surfaces. Human fetal osteoblastic cells hFOB 1.19 were used as model osteoblasts and were grown on nanoporous TiO2 templates, using Ti6AI4V and commercially pure Ti substrates as controls. Results show a significant increase in cell proliferation'on nanoporous TiO2 over flat substrates. Initial cell attachment data exhibited a significant effect by either fibronectin or vitronectin on cell adhesion at the surface of any of the tested materials. In addition, the extent of cell adhesion was significantly different between the nanoporous TiO2 and both Ti6AI4V and commercially pure Ti substrates, with the first showing the highest surface coverage. There was no significant difference on osteoblast attachment or proliferation between the presence of fibronectin or vitronectin using any of the material substrates. Taken together, these results suggest that the increase in osteoblast attachment and proliferation shown on the nanoporous TiO2 is due to an increase in the adsorption of fibronectin and vitronectin because of the higher surface area and to an enhanced protein unfolding, which allows access to osteoblast binding motifs within these proteins.
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Cattano D, Killoran PV, Iannucci D, Maddukuri V, Altamirano AV, Sridhar S, Seitan C, Chen Z, Hagberg CA. Anticipation of the difficult airway: preoperative airway assessment, an educational and quality improvement tool. Br J Anaesth 2013; 111:276-85. [PMID: 23471752 PMCID: PMC3711391 DOI: 10.1093/bja/aet029] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2012] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Assessment of the potentially difficult airway (DA) is a critical aspect of resident education. We investigated the impact of a new assessment form on airway prediction and management by anaesthesia residents. We hypothesized that residents would demonstrate improvement in evaluation of DAs over the study duration. METHODS After IRB approval, anaesthesia residents were randomized into two groups: control (existing form) and experimental (new form). Data were collected prospectively from August 2008 to May 2010 on all non-obstetric adult patients undergoing non-emergent surgery. RESULTS Eight thousand three hundred and sixty-four independent preoperative assessments were collected and 8075 were analysed. The experimental group had the higher completion rate than the control group (94.3% vs 84.3%, P=0.001). DA prediction was higher for the control group (71.2%) compared with the experimental group (69.1%; P=0.032). A significant improvement in prediction rates was found over time for the experimental group (likelihood estimate=0.00068, P=0.031). CONCLUSIONS The use of a comprehensive airway assessment did not improve resident ability to predict a DA in an academic, tertiary-based hospital, anaesthesiology residency training programme.
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Ravikumar Y, Sridhar S, Satyanarayana S. Development of an electrodialysis–distillation integrated process for separation of hazardous sodium azide to recover valuable DMSO solvent from pharmaceutical effluent. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.02.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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120
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Sridhar S, Le DM, Mi YC, Sinha S, Lai PY, Chan CK. Suppression of cardiac alternans by alternating-period-feedback stimulations. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:042712. [PMID: 23679454 DOI: 10.1103/physreve.87.042712] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 03/18/2013] [Indexed: 06/02/2023]
Abstract
Alternans response, comprising a sequence of alternating long and short action potential durations in heart tissue, seen during rapid periodic pacing can lead to conduction block resulting in potentially fatal cardiac failure. A method of pacing with feedback control is proposed to reduce the alternans and therefore the probability of subsequent cardiac failure. The reduction is achieved by feedback control using small perturbations of constant magnitude to the original, alternans-generating pacing period T, viz., using sequences of two alternating periods of T+ΔT and T-ΔT, with ΔT<<T. Such a control scheme for alternans suppression is demonstrated experimentally in isolated whole heart experiments. This alternans suppression scheme is further confirmed and investigated in detail by simulations of ion-channel-based cardiac models both for a single cell and in one-dimensional spatially extended systems. The mechanism of the success of our method can be understood in terms of dynamics in phase space, viz., as the state of activity of the cell being confined within a narrow volume of phase space for the duration of control, resulting in extremely diminished variation in successive action potential durations. Our method is much more robust to noise than previous alternans reduction techniques based on fixed point stabilization and should thus be more efficient in terms of experimental implementation, which has implications for clinical treatment for arrhythmia.
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121
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Sridhar S, Chinnathambi V, Arumugam P, Suresh PK. In Silico and in Vitro Physicochemical Screening of Rigidoporus sp. Crude Laccase-assisted Decolorization of Synthetic Dyes—Approaches for a Cost-effective Enzyme-based Remediation Methodology. Appl Biochem Biotechnol 2013; 169:911-22. [DOI: 10.1007/s12010-012-0041-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 12/17/2012] [Indexed: 01/16/2023]
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122
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Manjunath D, Madhumala M, Kalyani S, Prasad R, Sridhar S. Extraction of Tetrahydrofuran and Ethylene Dichloride Solvents from Aqueous Solutions by Pervaporation through Thin Film Composite PDMS Membranes. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2012.710700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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123
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Murali RS, Sankarshana T, Sridhar S. Air Separation by Polymer-based Membrane Technology. SEPARATION AND PURIFICATION REVIEWS 2013. [DOI: 10.1080/15422119.2012.686000] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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124
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Ngwa W, Korideck H, Kimmelman A, Kassis A, Kumar R, Sridhar S, Makrigiorgos M, Cormack R. In Vitro Dose Enhancement From Gold Nanoparticles During Low-dose-rate Gamma Irradiation With I-125 Brachytherapy Seeds. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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125
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Jewett M, Finelli A, Kollmannsberger C, Wood L, Legere L, Basiuk J, Canil C, Heng D, Reaume N, Tanguay S, Atkins M, Bjarnason G, Dancey J, Evans M, Fleshner N, Haider M, Kapoor A, Uzzo R, Maskens D, Soulieres D, Yousef G, Basappa N, Bendali N, Black P, Blais N, Cagiannos I, Care M, Chow R, Chung H, Czaykowski P, Derosa D, Durrant K, Ellard S, Farquharson G, Filion-Brulotte C, Gingerich J, Godbout L, Grant R, Hamilton W, Kassouf W, Kurban G, Lane K, Lattouf J, Lau D, Leveridge M, McCarthy J, Moore R, North S, O'brien P, Pituskin E, Racine P, Rendon R, So A, Sridhar S, Stubbs K, Su Z, Taylor L, Udall T, Venner P, Vogel W, Yap S, Yau P, Cooper M, Giroux N, Miron D, Mosher D, Ross K, Willacy J. Management of kidney cancer: canadian kidney cancer forum consensus update 2011. Can Urol Assoc J 2012; 6:16-22. [PMID: 22396361 DOI: 10.5489/cuaj.11273] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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