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Dubey S, Saha R, Mittapelly N, Anand A. Enantioselective Disposition after Single Dose I.V Administration of Ketorolac in Male Wistar Rats. Drug Res (Stuttg) 2013; 63:34-7. [DOI: 10.1055/s-0032-1331693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Dubey AK, Dubey S, Handu SS, Qazi MA. Vismodegib: The first drug approved for advanced and metastatic basal cell carcinoma. J Postgrad Med 2013; 59:48-50. [DOI: 10.4103/0022-3859.109494] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Davidenko I, Iveson T, Donehower R, Tjulandin S, Deptala A, Jiang Y, Zhu M, Oliner K, Dubey S, Loh E. Updated Efficacy, Biomarker, and Exposure-Response Data from a Phase 2 Study of Rilotumumab (R) Plus Epirubicin, Cisplatin, and Capecitabine (ECX) in Gastric (G) or Esophagogastric Junction (EGJ) Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33263-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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79
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Poletti A, Pareschi R, Dubey S, Colombo G, Lorusso R, Miceli S, Mazzoni A. Management of Low-Grade Papillary Adenocarcinomas of the Endolymphatic Sac. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1314308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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80
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Agrawal R, Dubey S, Ghosh S. Polaron induced parametric interactions in magnetized semiconductors. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1742-6596/365/1/012045] [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]
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81
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Gautam S, Rajkumar B, Landge SP, Dubey S, Nehete P, Boruah LC. Antimicrobial efficacy of metapex (calcium hydroxide with iodoform formulation) at different concentrations against selected microorganisms--an in vitro study. NEPAL MEDICAL COLLEGE JOURNAL : NMCJ 2011; 13:297-300. [PMID: 23016485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The objective of this study was to assess, in vitro, the effectiveness of several concentrations of Metapex (0.22 gm/ml, 0.022 gm/ml, 0.0022 gm/ml) in the elimination of selected microorganisms. Different concentrations of Metapex were prepared by dissolving it in ethanol (99.9%) Pre-sterilized Whatman paper discs, 6 mm in diameter and soaked with the test solution, were prepared and placed onto the previously seeded agar Petri plates. Plates were incubated aerobically for Enterococcus faecalis (E. Faecalis) and Candida albicans (C. albicans), anaerobically for Bacteroid fragilis (B. fragilis) and Propionibacterium acne respectivally. A zone of inhibition was recorded for each plate and the results were analysed statistically. There was significant reduction in the size of zone of inhibition against P. acne, as the concentration of metapex decreases. At lower concentrations of metapex there was no zone of inhibition observed against E. Faecalis, C. Albicans and B. Fragilis. The result of this study suggested that Metapex is a potent antimicrobial agent at higher concentration.
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Iveson T, Donehower R, Davidenko I, Tjulandin S, Deptala A, Harrison M, Loh E, Jiang Y, Oliner K, Dubey S. 6504 ORAL Safety and Efficacy of Epirubicin, Cisplatin, and Capecitabine (ECX) Plus Rilotumumab (R) as First-line Treatment for Unresectable Locally Advanced (LA) or Metastatic (M) Gastric or Esophagogastric Junction (EGJ) Adenocarcinoma. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71815-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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83
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Dubey S, Ahi S, Reddy IM, Kaur T, Beotra A, Jain S. A novel study of screening and confirmation of modafinil, adrafinil and their metabolite modafinilic acid under EI-GC-MS and ESI-LC-MS-MS ionization. Indian J Pharmacol 2011; 41:278-83. [PMID: 20407560 PMCID: PMC2846503 DOI: 10.4103/0253-7613.59928] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 06/30/2009] [Accepted: 12/09/2009] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE Adrafinil and modafinil have received wide publicity and have become controversial in the sporting world when several athletes were discovered allegedly using these drugs as doping agents. By acknowledging the facts, the World Anti-Doping Agency (WADA) banned these drugs in sports since 2004. The present study explores the possibility of differentiating adrafinil and modafinil and their major metabolites under electron impact ionization in gas chromatograph-mass spectrometer (GC-MSD) and electrospray ionization in liquid chromatograph-mass spectrometer (LC-MS/MS) by studying the fragmentation pattern of these drugs. MATERIALS AND METHODS Adrafinil, modafinil and their major metabolite, modafinilic acid were analyzed on EI-GC-MSD and ESI-LC-MS/MS using various individual parameters on both the instruments. The analytical technique and equipment used in the analysis were an Agilent 6890N GC with 5973 mass selective detector for the GC-MSD analysis and an Agilent 1100 HPLC with API-3200 Triple quadrupole mass spectrometer for the LC-MS/MS analysis. Validation of both methods was performed using six replicates at different concentrations. RESULT AND DISCUSSION The results show that adrafinil, modafinil and their major metabolite modafinilic acid could be detected as a single artifact without differentiation under EI-GC-MSD analysis. However, all drugs could be detected and differentiated under ESI-LCMS/MS analysis without any artifaction. The GC-MSD analysis gives a single artifact for both the drugs without differentiation and thus can be used as a marker for screening purposes. Further, the Multiple Reaction Monitoring (MRM) method developed under LC-MS/MS is fit for the purpose for confirmation of suspicious samples in routine sports testing and in forensic and clinical analysis.
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Dubey S, Perozzo R, Scapozza L, Kalia YN. Noninvasive Transdermal Iontophoretic Delivery of Biologically Active Human Basic Fibroblast Growth Factor. Mol Pharm 2011; 8:1322-31. [DOI: 10.1021/mp200125j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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85
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Singh G, Kapoor IPS, Dubey S. Nanocobaltite: Preparation, Characterization, and their Catalytic Activity. PROPELLANTS EXPLOSIVES PYROTECHNICS 2011. [DOI: 10.1002/prep.201000040] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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86
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Dubey S, Kalia Y. Electrically-assisted delivery of an anionic protein across intact skin: Cathodal iontophoresis of biologically active ribonuclease T1. J Control Release 2011; 152:356-62. [DOI: 10.1016/j.jconrel.2011.03.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 02/24/2011] [Accepted: 03/06/2011] [Indexed: 10/18/2022]
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87
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Dubey S, Kaur T, Jain S, Beotra A. Distribution of caffeine levels in urine in different sports in India. Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078725.24] [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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88
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Dubey S, Kalia Y. Non-invasive iontophoretic delivery of enzymatically active ribonuclease A (13.6kDa) across intact porcine and human skins. J Control Release 2010; 145:203-9. [DOI: 10.1016/j.jconrel.2010.04.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 04/19/2010] [Accepted: 04/20/2010] [Indexed: 11/15/2022]
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89
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Camidge DR, Ballas MS, Dubey S, Haigentz M, Rosen PJ, Spicer JF, West HJ, Shah GD, Youssoufian H, Mita AC. A phase II, open-label study of ramucirumab (IMC-1121B), an IgG1 fully human monoclonal antibody (MAb) targeting VEGFR-2, in combination with paclitaxel and carboplatin as first-line therapy in patients (pts) with stage IIIb/IV non-small cell lung cancer (NSCLC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.7588] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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90
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Dubey S, Shine R. Restricted dispersal and genetic diversity in populations of an endangered montane lizard (Eulamprus leuraensis, Scincidae). Mol Ecol 2010; 19:886-97. [PMID: 20149087 DOI: 10.1111/j.1365-294x.2010.04539.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Many alpine species are under threat from global climate change, as their geographic ranges become increasingly fragmented and unsuitable. Understanding rates and determinants of gene flow among such fragmented populations, over historical as well as recent timescales, can help to identify populations under threat. It is also important to clarify the degree to which loss of local populations reduces overall genetic diversity within the taxon. The endangered Blue Mountains Water Skink (Eulamprus leuraensis) is restricted to <40 small swamps in montane south-eastern Australia. Our analyses of seven microsatellite loci of 241 animals from 13 populations show strong geographic structure, with major genetic divergence even between populations separated by <0.5 km. Dispersal between populations is scarce, and appears to involve mostly males. Our analyses suggest potential recent bottleneck events in all the identified populations, and lower genetic diversity and population size parameter at lower-elevation sites than at higher-elevation sites. Management of this endangered taxon thus needs to treat most populations separately, because of their genetic distinctiveness and low rates of genetic exchange.
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Chakrabarty D, Trivedi PK, Shri M, Misra P, Asif MH, Dubey S, Kumar S, Rai A, Tiwari M, Shukla D, Pandey A, Nigam D, Tripathi RD, Tuli R. Differential transcriptional expression following thidiazuron-induced callus differentiation developmental shifts in rice. PLANT BIOLOGY (STUTTGART, GERMANY) 2010; 12:46-59. [PMID: 20653887 DOI: 10.1111/j.1438-8677.2009.00213.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Very little is known about molecular events associated with callus differentiation in indica rice. The genes expressed differentially during shoot meristem initiation were identified on genomic arrays applied to efficiently regenerating rice calli. A thidiazuron (TDZ; N-phenyl-N-thiadiazol-1,2,3-5,ylurea)-dependent regeneration protocol was developed for efficient embryogenesis in indica rice. The regenerating embryogenic calli induced by TDZ for 10 days showed transcriptional modulation of a number of genes associated with photosynthesis, hormone metabolism, plant development, signal transduction, light response, and plant defense. Eighteen candidate miRNAs were predicted to target the genes expressed differentially in the embryogenic calli grown in TDZ-containing medium. The majority of the photosynthesis-related genes up-regulated in differentiating calli were not expressed or were down-regulated in developing seeds and inflorescences. Most of the genes down-regulated in differentiating calli were up-regulated in developing seeds. The transcriptome of differentiating callus most closely resembled that of the germinating whole seed.
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Rolland M, Tovanabutra S, Gilbert PB, Sanders-Buell E, Heath L, deCamp AC, Magaret CC, Bose M, Bradfield A, O'Sullivan A, Crossler J, Deng W, Zhao H, Wong K, Raugi DN, Hural J, Dubey S, Frahm N, Michael NL, Shiver J, Corey L, Li F, Self SG, Kim J, Buchbinder S, Casimiro DR, Robertson MN, McElrath MJ, McCutchan FE, Mullins JI. OA06-06 LB. Evidence of vaccine-induced changes in breakthrough HIV-1 strains from the Step trial. Retrovirology 2009. [PMCID: PMC2767565 DOI: 10.1186/1742-4690-6-s3-o42] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hutnick N, Carnathan D, Dubey S, Cox K, Ratcliffe S, Robertson MN, Casimiro DR, Ertl HC, Betts MR. P16-09. Adenovirus 5 vector HIV vaccination does not affect mucosal homing markers on Ad5-specific CD4+ T-cells in humans. Retrovirology 2009. [PMCID: PMC2767735 DOI: 10.1186/1742-4690-6-s3-p238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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94
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Dubey S, Perozzo R, Scapozza L, Kalia Y. Cloning, expression and purification of recombinant human basic fibroblast growth factor using E. Coli as expression host. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.219] [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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95
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Dubey S, Griffin A, Hwang J. Health care disparity: An analysis of breast, colon, and lung cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.6579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
6579 Background: Lung cancer patients are associated with feeling of guilt about their disease (Schmidt ASCO 2006) and less likely to be referred to specialists (Wassenaar ASCO 2006). They are also commonly affected by smoking related comorbidities. A study was undertaken to evaluate whether treatment differences between lung and other cancers exist. Methods: Public access data for the year 2005 from the National Cancer Data Base (NCDB) was analyzed. Treatment data were categorized by institution (teaching/research [TR] versus community cancer center [CC]) and tumor type (non-small cell lung cancer-NSCLC, breast, colon cancer). Descriptive analysis was performed with student T tests for proportions. Results: The analysis included 18,960 NSCLC patients from a CC and 33,924 from a TR. More patients at TR than CC had surgery: Stage I 65% vs 52% (p < 0.001), Stage II 35% vs 22% (p < 0.001), respectively. The frequency of chemoradiation for stage I and II was higher in CC than TR: stage I 6% vs 3% (p = 0.10), stage II 19% vs 9% (p = 0.004). The frequency of no first course treatment at initial presentation at CC and TR were the following: stage I 15% vs 6%, stage II 18% vs 8%, stage III 21% vs 19%, stage IV 30% vs 24%. For breast and colon cancer, no major differences in no first course treatments were seen between TR and CC in a stage based analysis. More patients with NSCLC (21.2%) did not receive first course treatment in comparison to breast (3.4%, p < 0.001) or colon cancer (7.8%, p < 0.001). These differences were maintained in stage based analysis of the three tumor types. Conclusions: NSCLC patients are at higher risk of not receiving treatment as opposed to those with breast and colon cancer. While medical comorbidities in lung cancer patients may affect these treatment decisions, we noted a higher incidence of no first course treatment in CC than TR centers. For stage I and II, the frequency of no first course treatment in a CC was twice that of a TR. Such institution based differences were not noted in breast and colon cancer. No significant financial relationships to disclose.
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Dubey S, Kerrigan N, Mills K, Scott DG. Bronchospasm associated with anti-TNF treatment. Clin Rheumatol 2009; 28:989-92. [PMID: 19340514 DOI: 10.1007/s10067-009-1169-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 02/08/2009] [Accepted: 03/13/2009] [Indexed: 11/25/2022]
Abstract
The aetiology of breathing difficulties in patients with inflammatory arthritis being treated with anti-TNF agents can be multi-factorial. Exacerbation of fibrosing alveolitis in patients recently commencing Infliximab has been previously described. Bronchospasm, although reported in some study patients, has not been formally investigated so far. The objective of this study is to define the incidence of bronchospasm in patients treated with anti-TNF agents and investigate details of their respiratory problems. We retrospectively reviewed the notes for 421 patients with inflammatory arthritis being treated with anti-TNF agents at our centre to identify patients who had developed respiratory symptoms during the course of this treatment (cardiac or pleural disease, thromboembolic phenomena or infection were excluded). We identified 7 patients where bronchospasm was thought to be due to treatment with anti-TNF drugs (1.7%). Four of these had to discontinue anti-TNF treatment; two of these needed oral corticosteroid therapy. Two patients were stabilised with increased inhaled beta-2 agonist and steroid, while one patient did not need treatment. All patients had significant exposure to smoking. Bronchospasm is not an uncommon side-effect of anti-TNF treatment. The aetiology of this is probably multi-factorial, but current or previous smoking appears to be a predisposing factor. The frequency and severity of bronchospasm appears to be greater than previously anticipated, all three anti-TNF agents appear to be implicated.
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Sarkar S, Sadhu S, Jahangir T, Pandit K, Dubey S, Roy MK. Laparoscopic common bile duct exploration using a rigid nephroscope. Br J Surg 2009; 96:412-6. [PMID: 19283750 DOI: 10.1002/bjs.6579] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abstract
Background
Patients with cholelithiasis and choledocholithiasis are increasingly managed with laparoscopic bile duct exploration and cholecystectomy. Large impacted bile duct stones continue to defy laparoscopic extraction. This study explored the feasibility of laparoscopic bile duct clearance using a rigid nephroscope, which is suited to extracting large stones.
Method
This prospective study recruited patients with large bile duct stones and a bile duct wider than 8 mm on ultrasonography. In addition to standard ports for laparoscopic cholecystectomy, a custom-made 9-mm port was introduced in the epigastrium for the rigid nephroscope, which was negotiated into the bile duct through a choledochotomy. Rigid graspers and lithotripters were introduced through the nephroscope to fragment and remove the calculi.
Results
Between December 2005 and September 2008, 18 patients had nephroscope-guided bile duct exploration (mean(s.d.) age 49(13·9) years, bile duct diameter 11·3(2·3) mm). Three patients had solitary stones and 15 had multiple calculi. Most of the stones were removed with graspers, but the lithotripter was required in five patients. The mean(s.d.) hospital stay was 6(2·3) days. Two patients required postoperative endoscopic retrograde cholangiopancreaticography for residual stones.
Conclusion
The rigid nephroscope was useful for laparoscopic bile duct exploration, particularly for large impacted stones.
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Singh G, Kapoor I, Dubey S, Siril P. Kinetics of Thermal Decomposition of Ammonium Perchlorate with Nanocrystals of Binary Transition Metal Ferrites. PROPELLANTS EXPLOSIVES PYROTECHNICS 2009. [DOI: 10.1002/prep.200900017] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Jain RK, Kirar P, Gupta G, Dubey S, Gupta SK, Goyal J. A comparative study of low dose weekly paclitaxel versus cisplatin with concurrent radiation in the treatment of locally advanced head and neck cancers. Indian J Cancer 2009; 46:50-3. [DOI: 10.4103/0019-509x.48596] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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100
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Singh G, Kapoor IPS, Dubey S, Siril PF. Preparation, Characterization and Catalytic Activity of Transition Metal Oxide Nanocrystals. ACTA ACUST UNITED AC 2009. [DOI: 10.1166/jcp.2009.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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