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Srivastava S, Bhargava A. Biofilms and human health. Biotechnol Lett 2015; 38:1-22. [PMID: 26386834 DOI: 10.1007/s10529-015-1960-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 09/09/2015] [Indexed: 01/25/2023]
Abstract
A biofilm can be defined as a surface-attached (sessile) community of microorganisms embedded and growing in a self-produced matrix of extracellular polymeric substances. These biofilm communities can be found in medical, industrial and natural environments, and can also be engineered in vitro for various biotechnological applications. Biofilms play a significant role in the transmission and persistence of human disease especially for diseases associated with inert surfaces, including medical devices for internal or external use. Biofilm infections on implants or in-dwelling devices are difficult to eradicate because of their much better protection against macrophages and antibiotics, compared to free living cells, leading to severe clinical complications often with lethal outcome. Recent developments in nanotechnology have provided novel approaches to preventing and dispersing biofilm related infections and potentially providing a novel method for fighting infections that is nondrug related.
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Pant A, Asthana J, Yadav AK, Rathor L, Srivastava S, Gupta MM, Pandey R. Verminoside mediates life span extension and alleviates stress in Caenorhabditis elegans. Free Radic Res 2015; 49:1384-92. [PMID: 26189547 DOI: 10.3109/10715762.2015.1075017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The discovery of bioactive molecules modulating aging in living organism promotes development of natural therapeutics for curing age-related afflictions. The progression in age-related disorders can be attributed to increment in intracellular reactive oxygen species (ROS) and oxidative stress level. To this end, we isolated an iridoid verminoside (VMS) from Stereospermum suaveolens (Roxb.) DC. and evaluated its effect on Caenorhabditis elegans. The present study delineates VMS-mediated alteration of intracellular ROS, oxidative stress, and life span in C. elegans. The different tested doses of VMS (5 μM, 25 μM, and 50 μM) were able to enhance ROS scavenging and extend mean life span in C. elegans. The maximal life span extension was observed in 25 μM VMS, that is, 20.79% (P < 0.0001) followed by 9.84% (P < 0.0001) in 5 μM VMS and 8.54% (P < 0.0001) in 50 μM VMS. VMS was able to alleviate juglone-induced oxidative stress and enhanced thermotolerance in worms. The stress-modulating and ROS-scavenging potential of VMS was validated by increment in mean survival by 29.54% (P < 0.0001) in VMS-treated oxidative stress hypersensitive mev-1 mutant strain. Furthermore, VMS modulates expression of DAF-16 (a FoxO transcription factor) promoting stress resistance and longevity. Altogether, our results suggest that VMS attenuates intracellular ROS and stress (oxidative and thermal) level promoting longevity. The longevity and stress modulation can be attributed to VMS-mediated alterations in daf-16 expression which regulates insulin signaling pathway. This study opens doors for development of phytomolecule-based therapeutics for prolonging life span and managing age-related severe disorders.
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Aggarwal H, Kaur H, Saklani R, Saba N, Choudhary S, Dogra S, Srivastava S, Mathur R, Gupta S. Prevalence of obesity and associated hypertension and diabetes in Delhi, metropolitan city of India. INDIAN JOURNAL OF MEDICAL SPECIALITIES 2015. [DOI: 10.1016/j.injms.2015.06.005] [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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104
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Srivastava S, Andersen A, Cheng C, Das I. TU-G-BRD-03: IMRT Dosimetry Differences in An Institution with Community and Academic Model. Med Phys 2015. [DOI: 10.1118/1.4925738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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105
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Srivastava S, Andersen A, Lulu B, Cheng C, Das I. SU-E-T-366: Estimation of Whole Body Dose From Cranial Irradiation From C and Perfexion Series Gamma Knife Units. Med Phys 2015. [DOI: 10.1118/1.4924727] [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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Aggarwal A, Srivastava S, Agarwal MP, Dwivedi S. Premature Graying of Hair: An Independent Risk Marker for Coronary Artery Disease in Smokers - A Retrospective Case Control Study. Ethiop J Health Sci 2015; 25:123-8. [PMID: 26124619 PMCID: PMC4478263 DOI: 10.4314/ejhs.v25i2.4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Premature graying of hair as a risk marker among young smokers has a potential of identifying coronary artery disease (CAD) at a very early stage. There is absence of literature that assesses premature graying of hair as an independent marker of CAD in smokers. MATERIAL AND METHODS The present single-centre case control study enrolled a total of 62 consecutive chronic smokers (≤ 45 years) (Group I) and 60 consecutive young CAD patients (≤45 years) who were chronic smokers (Group II). Another group comprising of 114 patients (≤45 years) having no smoking history and no cardiac ailments either (Group III) was enrolled as control population. All subjects were males. A detailed history and clinical examination regarding conventional coronary risk factors and carotid intima media thickness was done in both groups. RESULTS The carotid intima media thickness, dyslipidemia and blood pressure were significantly higher in group I and II as compared to group III. When the groups were compared for graying of hair, it was found that the group II (i.e., smokers and CAD) had maximum prevalence of graying which was significantly higher than the control as well as smoker groups. The presence of premature graying of hair was associated with 3.24 times the risk of CAD on multiple logistic regression analysis. CONCLUSION The presence of premature graying of hair was associated with an increased risk of CAD in young smokers. Premature graying of hair can be used as preliminary evidence by clinicians for classifying patients at risk for premature CAD especially in smokers.
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Johnson AJ, Shukle RH, Chen MS, Srivastava S, Subramanyam S, Schemerhorn BJ, Weintraub PG, Abdel Moniem HEM, Flanders KL, Buntin GD, Williams CE. Differential expression of candidate salivary effector proteins in field collections of Hessian fly, Mayetiola destructor. INSECT MOLECULAR BIOLOGY 2015; 24:191-202. [PMID: 25528896 PMCID: PMC4406158 DOI: 10.1111/imb.12148] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Evidence is emerging that some proteins secreted by gall-forming parasites of plants act as effectors responsible for systemic changes in the host plant, such as galling and nutrient tissue formation. A large number of secreted salivary gland proteins (SSGPs) that are the putative effectors responsible for the physiological changes elicited in susceptible seedling wheat by Hessian fly, Mayetiola destructor (Say), larvae have been documented. However, how the genes encoding these candidate effectors might respond under field conditions is unknown. The goal of this study was to use microarray analysis to investigate variation in SSGP transcript abundance amongst field collections from different geographical regions (southeastern USA, central USA, and the Middle East). Results revealed significant variation in SSGP transcript abundance amongst the field collections studied. The field collections separated into three distinct groups that corresponded to the wheat classes grown in the different geographical regions as well as to recently described Hessian fly populations. These data support previous reports correlating Hessian fly population structure with micropopulation differences owing to agro-ecosystem parameters such as cultivation of regionally adapted wheat varieties, deployment of resistance genes and variation in climatic conditions.
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Ross RD, Brook M, Feinstein JA, Koenig P, Lang P, Spicer R, Vincent JA, Lewis AB, Martin GR, Bartz PJ, Fischbach PS, Fulton DR, Matherne GP, Reinking B, Srivastava S, Printz B, Geva T, Shirali GS, Weinberg P, Wong PC, Armsby LB, Vincent RN, Foerster SR, Holzer RJ, Moore JW, Marshall AC, Latson L, Dubin AM, Walsh EP, Franklin W, Kanter RJ, Saul JP, Shah MJ, Van Hare GF, Feltes TF, Roth SJ, Almodovar MC, Andropoulos DB, Bohn DJ, Costello JM, Gajarski RJ, Mott AR, Stout K, Valente AM, Cook S, Gurvitz M, Saidi A, Webber SA, Hsu DT, Ivy DD, Kulik TJ, Pahl E, Rosenthal DN, Morrow R, Mahle WT, Murphy AM, Li JS, Law YM, Newburger JW, Daniels SR, Bernstein D, Marino BS. 2015 SPCTPD/ACC/AAP/AHA Training Guidelines for Pediatric Cardiology Fellowship Programs (Revision of the 2005 Training Guidelines for Pediatric Cardiology Fellowship Programs). J Am Coll Cardiol 2015; 66:S0735-1097(15)00809-8. [PMID: 25777637 DOI: 10.1016/j.jacc.2015.03.004] [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: 11/23/2022]
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110
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Pasipanodya J, Srivastava S, Gumbo T. Fatal Lure of Look-Back Studies in Explaining Pharmacological Events Such as Acquired Drug Resistance in Patients With Multidrug-Resistant Tuberculosis. J Infect Dis 2015; 212:166-7. [DOI: 10.1093/infdis/jiv068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 01/27/2015] [Indexed: 11/15/2022] Open
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111
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Srivastava S, Sharma I, Bhatia MS. Parenting in children and adolescents with psychosis. Indian Pediatr 2015; 51:991-5. [PMID: 25560157 DOI: 10.1007/s13312-014-0544-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
NEED AND PURPOSE OF REVIEW Psychotic symptoms appear in children and adolescents in the most crucial years, during the individual's career development. The challenges faced by parents of psychotic children are in dealing with their disruptive behaviours, negative symptoms, cognitive deficits, delusions and hallucinations. This paper presents an overview of the childhood psychosis and how parenting can be done effectively for this population. METHODS Articles were retrieved from the Medline, Cochrane database, Google Scholar, Medscape; using the search terms 'parenting and childhood psychosis', and 'childhood psychoses; and standard textbooks were consulted. MAIN CONCLUSIONS Educating parents how to recognize early symptoms, explaining treatment adherence, side effects of medications along with non-pharmacological measures like dealing with expressed emotions, lowering expectations, enhancing social supports, healthy lifestyle, and making patients independent. Awareness, early identification and effective parenting for psychosis may help bridge the wide gap between scarce skilled mental health professionals, inefficient resources and large paediatric population.
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Antoniou S, Tung H, Srivastava S. P162 A Two Month Prospective Study: Are Ctpas Requested Appropriately And If Not Do They Diagnose Alternative Pathologies? Thorax 2014. [DOI: 10.1136/thoraxjnl-2014-206260.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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113
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Gupta DS, Bumb SS, Jurel SK, Srivastava S. Unusual pathology of unusual location: a case of a palatal sialolith. BMJ Case Rep 2014; 2014:bcr-2014-206830. [PMID: 25326569 DOI: 10.1136/bcr-2014-206830] [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] Open
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114
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Srivastava S, Devlin A, Yan-Naing Winn L, Tez D, Giles M. Wegener's granulomatosis - an unusual case of colonic haemorrhage. QJM 2014; 107:841-3. [PMID: 22351898 DOI: 10.1093/qjmed/hcs026] [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: 11/12/2022] Open
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115
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Chhonker YS, Chandasana H, Kumar A, Kumar D, Laxman TS, Mishra SK, Balaramnavar VM, Srivastava S, Saxena AK, Bhatta RS. Pharmacokinetics, Tissue Distribution and Plasma Protein Binding Studies of Rohitukine: A Potent Anti-hyperlipidemic Agent. Drug Res (Stuttg) 2014; 65:380-7. [PMID: 25243649 DOI: 10.1055/s-0034-1387774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Rohitukine (RH) is a chromone alkaloid considered as one of the major active component of Dysoxylum binectariferum, exhibiting diverse pharmacological activities such as anti-hyperlipidemic, anti-cancer, anti-inflammatory, immuno-modulatory, anti-leishmanial, anti ulcer and anti-fertility. There's still a lack of information of RH, inclusive of pharmacokinetics, tissue distribution and excretion, in vivo studies in experimental animals, such as hamster and rats. In this study, a selective and sensitive bioanalytical method was developed and validated using HPLC-UV system. The assay was applied to estimate pharmacokinetics, tissue distribution and excretion of RH in hamster at 50 mg/kg oral dose. It rapidly reached systemic circulation and distributed to various tissues, and highest concentration was observed in liver. The pharmacokinetic parameters such as clearance (CL/F) was 3.95±0.9 L/h/kg, volume of distribution (Vd/F) was 17.34±11.34 L/kg and elimination half-life was 2.62±1.34 h. RH shows moderate protein binding ~ 60% and found stable in gastro-intestinal fluid, a property that favors oral administration.
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Dhir B, Srivastava S. Effect of short term irrigation with treated and untreated wastewater on growth and physio-biochemical parameters of wheat. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s40502-014-0098-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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117
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Cullen J, Rosner I, Brand T, Ali A, Chen Y, Zhang N, Tsiatis A, Knezevic D, Maddala T, Lawrence H, Febbo P, Srivastava S, Sesterhenn I, McLeod D. A Prospectively-Designed Study to Determine the Association of a 17-Gene Genomic Prostate Score with Recurrence Following Surgery for Localised Prostate Cancer (Pca). Ann Oncol 2014. [DOI: 10.1093/annonc/mdu438.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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118
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Choueiri T, Fishman M, Escudier B, Kim J, Kluger H, Stadler W, Perez-Garcia J, McNeel D, Curti B, Harrison M, Plimack E, Appleman L, Fong L, Drake C, Cohen L, Srivastava S, Jure-Kunkel M, Hong Q, Kurland J, Sznol M. Immunomodulatory Activity of Nivolumab in Previously Treated and Untreated Metastatic Renal Cell Carcinoma (Mrcc): Biomarker-Based Results from a Randomized Clinical Trial. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu342.4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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119
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Pasipanodya JG, Srivastava S, Gumbo T. Comment on: Clinical significance of 2 h plasma concentrations of first-line anti-tuberculosis drugs: a prospective observational study. J Antimicrob Chemother 2014; 70:320-1. [DOI: 10.1093/jac/dku345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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120
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Srivastava S, Sinha D, Saha PP, Marthala H, D'Silva P. Magmas functions as a ROS regulator and provides cytoprotection against oxidative stress-mediated damages. Cell Death Dis 2014; 5:e1394. [PMID: 25165880 PMCID: PMC4454327 DOI: 10.1038/cddis.2014.355] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/25/2014] [Accepted: 07/14/2014] [Indexed: 12/14/2022]
Abstract
Redox imbalance generates multiple cellular damages leading to oxidative stress-mediated pathological conditions such as neurodegenerative diseases and cancer progression. Therefore, maintenance of reactive oxygen species (ROS) homeostasis is most important that involves well-defined antioxidant machinery. In the present study, we have identified for the first time a component of mammalian protein translocation machinery Magmas to perform a critical ROS regulatory function. Magmas overexpression has been reported in highly metabolically active tissues and cancer cells that are prone to oxidative damage. We found that Magmas regulates cellular ROS levels by controlling its production as well as scavenging. Magmas promotes cellular tolerance toward oxidative stress by enhancing antioxidant enzyme activity, thus preventing induction of apoptosis and damage to cellular components. Magmas enhances the activity of electron transport chain (ETC) complexes, causing reduced ROS production. Our results suggest that J-like domain of Magmas is essential for maintenance of redox balance. The function of Magmas as a ROS sensor was found to be independent of its role in protein import. The unique ROS modulatory role of Magmas is highlighted by its ability to increase cell tolerance to oxidative stress even in yeast model organism. The cytoprotective capability of Magmas against oxidative damage makes it an important candidate for future investigation in therapeutics of oxidative stress-related diseases.
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Srivastava S, Baer M, Sathyamurthy N. Jahn–Teller and coupled Jahn–Teller/Renner–Teller effects in the calculation of adiabatic-to-diabatic transformation angle for the lowest three2A′ states of NH2(NHH). Mol Phys 2014. [DOI: 10.1080/00268976.2014.948089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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122
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Srivastava S, Yazdchi K, Luding S. Mesoscale dynamic coupling of finite- and discrete-element methods for fluid-particle interactions. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2014; 372:rsta.2013.0386. [PMID: 24982251 DOI: 10.1098/rsta.2013.0386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new method for two-way fluid-particle coupling on an unstructured mesoscopically coarse mesh is presented. In this approach, we combine a (higher order) finite-element method (FEM) on the moving mesh for the fluid with a soft sphere discrete-element method for the particles. The novel feature of the proposed scheme is that the FEM mesh is a dynamic Delaunay triangulation based on the positions of the moving particles. Thus, the mesh can be multi-purpose: it provides (i) a framework for the discretization of the Navier-Stokes equations, (ii) a simple tool for detecting contacts between moving particles, (iii) a basis for coarse-graining or upscaling, and (iv) coupling with other physical fields (temperature, electromagnetic, etc.). This approach is suitable for a wide range of dilute and dense particulate flows, because the mesh resolution adapts with particle density in a given region. Two-way momentum exchange is implemented using semi-empirical drag laws akin to other popular approaches; for example, the discrete particle method, where a finite-volume solver on a coarser, fixed grid is used. We validate the methodology with several basic test cases, including single- and double-particle settling with analytical and empirical expectations, and flow through ordered and random porous media, when compared against finely resolved FEM simulations of flow through fixed arrays of particles.
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Srivastava S. 56: The NCI early detection research network: Charting the course of biomarker research. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50056-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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124
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Jurel SK, Gupta DS, Singh RD, Singh M, Srivastava S. Genes and oral cancer. INDIAN JOURNAL OF HUMAN GENETICS 2014; 20:4-9. [PMID: 24959008 PMCID: PMC4065477 DOI: 10.4103/0971-6866.132745] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Oral cancers have been one of the leading causes of deaths particularly in the developing countries. Prime reason for this high mortality and morbidity is attributed to the delay in diagnosis and prompt treatment. Relentless research in the field of oncology has led to the advent of novel procedures for the early detection of oral cancers. Molecular biology is highly promising in this regard. It is a procedure that detects alterations at a molecular level much before they are seen under a microscope and much before clinical changes occur. Molecular studies serve as the basis by which we will eventually be able not only to augment clinical assessment and classification of oral lesions but also predict malignant potential of oral lesions, thus reducing the incidence and increasing the scope for early diagnosis and treatment of oral cancers. However, making such sophisticated tools available for the common man in developing countries is one of the most important challenges faced today.
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Akino Y, Slessinger E, Srivastava S, Das I. SU-E-T-487: Impact of Geometric Uncertainties in Accelerated Partial Breast Irradiation Using the Strut-Adjusted Volume Implant (SAVI). Med Phys 2014. [DOI: 10.1118/1.4888820] [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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