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Chatterjee S, Sharma CB, Guria RT, Dubey S. An Interesting Case of Stroke in Young. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2020; 68:61. [PMID: 31979649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Dubey S, Ramakrishnan V, Dubey A, Yadalla S, Prabhu N, Dubey T. Wings of fall. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dubey S, Ramakrishnan V, Dubey A, Sailaja Y, Prabhu N, Dubey T. Epilepsy out-patient nano-monograph (EPONAM). J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Herrstedt J, Summers Y, Jordan K, von Pawel J, Jakobsen AH, Ewertz M, Chan S, Naik JD, Karthaus M, Dubey S, Davis R, Fox GM. Amisulpride prevents nausea and vomiting associated with highly emetogenic chemotherapy: a randomised, double-blind, placebo-controlled, dose-ranging trial. Support Care Cancer 2018; 27:2699-2705. [DOI: 10.1007/s00520-018-4564-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 11/20/2018] [Indexed: 12/29/2022]
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Sharma GM, Bhardwaj AR, Relwani NR, Dubey S. Lymphatic Filariasis Presenting as a Swelling over the Upper Arm: A Case Report. Malays Orthop J 2018; 12:63-65. [PMID: 29725519 PMCID: PMC5920265 DOI: 10.5704/moj.1803.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Filariasis continues to be one of the endemic problems worldwide with 40% of the cases in India. We report a case of lymphatic filariasis in a 32-year old female who presented with a non-tender swelling over left upper arm. Blood sample showed no eosinophilia while the FNAC was diagnostic of W. bancrofti. Patient responded well with oral diethylcarbamazine. High index of suspicion of filariasis is indicated when dealing with a swelling of unknown cause especially in filariasis endemic areas.
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Inkster JAH, Zhang S, Akurathi V, Belanger A, Dubey S, Treves T, Packard AB. New chemical and radiochemical routes to [ 18F]Rho6G-DEG-F, a delocalized lipophilic cation for myocardial perfusion imaging with PET. MEDCHEMCOMM 2017; 8:1891-1896. [PMID: 29276578 DOI: 10.1039/c7md00326a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New chemical and radiochemical syntheses are described for the preparation of [18F]Rho6G-DEG-F, an 18F-labeled analogue of the fluoresecent dye rhodamine 6G, which has shown promise as myocardidal perfusion imaging agent. Tosylated precursors of [18F]Rho6G-DEG-F amenable to 18F-labeling were obtained either through a two-step synthesis from rhodamine 6G lactone (33% yield), or in one step from rhodamine 575 (64% yield), then purified by preparative C18 chromatography. Manual synthesis of [18F]Rho6G-DEG-F was achieved in a single radiochemical step from either the tosylate salt or the tosylate/formate double salt in DMSO under standard nucleophillic aliphatic 18F-fluorination conditions (K[18F]F/K2CO3/Kryptofix 2.2.2.). Incorporation of the [18F]F- was found to be satisfactory (≥34% by TLC), despite the protic character of the precursor molecules. [18F]Rho6G-DEG-F was manually synthesized in final decay-corrected radiochemical yields of 11-26% (tosylate salt) and 9-21% (tosylate/formate double salt). The protocol was transferred to an automated synthesis unit, where the product was obtained in 3-9% radiochemical yield (n=3) decay corrected to start-of-synthesis, >99% radiochemical purity, and a molar activity of 122-267 GBq/μmol (3.3-7.2 Ci/μmol).
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Dubey PK, Dubey S, Mishra SK, Arora R, Patel J, Singh KP, Kathiravan P, Mishra BP, Kataria RS. PCR-SSCP analysis of MDGI gene and its association with milk production traits in river buffalo (Bubalus bubalis). Res Vet Sci 2017. [PMID: 28647599 DOI: 10.1016/j.rvsc.2017.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this study, we investigated the genetic variation within 3'UTR of Mammary-Derived Growth Inhibitor (MDGI) gene of buffalo using PCR-SSCP and sequencing; and also analyzed association of polymorphism with the milk production traits. The study revealed two conformational patterns, 'A' and 'B' among 234 Mehsana buffaloes maintained with their records in the field and at farm. The frequency of SSCP variant 'A' was found to be invariably high in the buffalo population under study. Further, association analysis of SSCP variants with various milk production and milk quality traits indicated no significant effect on any of the traits investigated. Sequencing of SSCP variant 'A' showed homozygous G/G and A/A and 'B' had heterozygous G/C and A/G at positions +124 and +140 respectively, in the 3'UTR of buffalo MDGI. The preliminary results showed the substantial variations in the distribution of SSCP variants' frequencies within Mehsana buffaloes, however these variants had non-significant association with milk yield, fat yield and fat percentage in Mehsana buffaloes.
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Nandu H, Kijewski MF, Dubey S, Belanger AP, Reardon D, Wen P, Kesari S, Horky L, Park M, Huang RY. P09.13 F-18 FLT PET and MRI as outcome predictors in glioblastomas following chemoradiation therapy. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.271] [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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Maundrell J, Dubey S. AB1066 Assessing Awareness of The Effects of Smoking in A Rheumatological Outpatient Setting. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3506] [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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Dubey S, Agrawal A, Chauhan L, Mukherjee S, Douglas G. Combined trabeculotomy-trabeculectomy with antimetabolite and releasable suture: outcome with primary congenital glaucoma in a north Indian population. Nepal J Ophthalmol 2015; 7:16-25. [PMID: 26695601 DOI: 10.3126/nepjoph.v7i1.13161] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To determine the surgical outcomes of combined trabeculotomy- trabeculectomy with mitomycin-C and releasable suture in children with primary congenital glaucoma (PCG) in a North Indian population. DESIGN Retrospective, interventional, consecutive, non-comparative case series. MATERIALS AND METHODS The medical records of 137 eyes of 77 patients who underwent combined trabeculotomy- trabeculectomy with 0.2 mg/ml mitomycin C (MMC) either bilaterally (49 patients) or unilaterally (28 patients) between January 2004 and March 2012 were reviewed retrospectively. The main outcome measures were postoperative intraocular pressures, corneal clarity and diameter, duration of follow-up, success rate and complications. RESULTS The mean preoperative intraocular pressure reduced from 34 ± 7 mm Hg (range 15- 54 mm Hg) to 17 ± 7 mm Hg (range 5 - 32 mm Hg) with a mean reduction of 44 % (P less than 0.001). The mean follow-up period was 24.4 ± 10.3 months (range 6 - 48 months). Complete success defined as intraocular pressure less than 21 mm Hg without any medication and clinically stable glaucoma at last follow-up was achieved in 113 eyes (83 %) while a 'qualified success' of intraocular pressure less than 21 mm Hg with one medication was achieved in ten eyes (7 %). The Kaplan-Meier survival analysis revealed success rates (at 'n' months) of 90 % (6), 85 % (12), 82 % (24), 80 % (36) and 77 % (48). There were no significant intraoperative or postoperative complications. CONCLUSION Primary combined trabeculotomy-trabeculectomy with mitomycin-C and releasable suture offers a viable surgical option in Northern Indian infants with primary congenital glaucoma. The use of 0.2 mg/ml mitomycin C for 2 minutes improves the overall success while the releasable suture decreases the risk of postoperative complications especially associated with the use of antimetabolites.
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Saha SG, Vijaywargiya N, Dubey S, Saxena D, Kala S. Retracted: Evaluation of the incidence of microcracks caused by Mtwo and ProTaper NEXT rotary file systems versus the Self Adjusting File: a scanning electron microscopic study. Int Endod J 2015; 49:911. [PMID: 26599835 DOI: 10.1111/iej.12586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The following article from International Endodontic Journal, 'Evaluation of the incidence of microcracks caused by Mtwo and ProTaper NEXT rotary file systems versus the Self Adjusting File: a scanning electron microscopic study' by S. G. Saha, N. Vijaywargiya, S. Dubey, D. Saxena & S. Kala, published online on 24 November 2015 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief, Prof. Paul Dummer, and John Wiley & Sons Ltd. The retraction has been agreed due to the consideration that the SEM methodology used by the authors has the potential to cause cracks and is thus is not suitable for the evaluation of micro-cracks in roots.
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Herrstedt J, Summers Y, Jordan K, Von Pawel J, Jakobsen A, Ewertz M, Chan S, Naik J, Karthaus M, Dubey S, Davis R, Fox G. 1573 Amisulpride, a dopamine D2/D3-antagonist, prevents chemotherapyinduced nausea and vomiting (CINV) in patients receiving highly emetogenic cisplatin or anthracycline-cyclophosphamide regimens: A randomised, double-blind, placebo-controlled, dose-ranging trial. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30662-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Oldroyd A, Dubey S. The association between bone mineral density and higher body mass index in men. Int J Clin Pract 2015; 69:145-7. [PMID: 25496013 DOI: 10.1111/ijcp.12523] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 07/14/2014] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND A number of studies have identified that higher body mass index is associated with higher bone mineral density. However, a small number of previous studies have indicated an association between higher body mass index (> 35 kg/m(2)) and lower bone mineral density. No previous study has investigated the association between higher body mass index and bone mineral density in a large male population. METHODS Data of men aged over 50 years of age who attended for a dual energy X-ray absorptiometry scan at a UK teaching hospital were collated. The population was divided according to body mass index increments of 5 kg/m(2). The mean bone mineral density of both the lumbar spine and femoral neck was ascertained for each body mass index category. Multiple linear regression analysis, adjusted for age, was used to investigate for an association between body mass index and bone mineral density. RESULTS Data of 1263 men were collated. Increasing body mass index was associated with increasing bone mineral density of both the lumbar spine and femoral neck up to 35 kg/m(2); further increase in body mass index was not associated with an increasing bone mineral density. CONCLUSIONS The beneficial effect upon bone mineral density of increasing body mass index exists up to 35 kg/m(2); a body mass index higher than 35 kg/m(2) is not associated with further increase in bone mineral density.
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Kannan V, Bajpai R, Anand V, Deshpande S, Misra BK, Kapadia A, Almel S, Sankhe M, Desai K, Kannan A, Dubey S, Ashok PP, Shinde S. RT-12 * OUTCOMES IN MEDULLOBLASTOMA: SINGLE INSTITUTION CASE SERIES. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou270.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Dubey S, Bose D, Shukla SK, Durgbanshi A, Esteve-Romero J, Carda-Broch S. DETERMINATION OF ALPHA-BETA ARTEETHER IN PHARMACEUTICAL PRODUCTS USING DIRECT INJECTION MICELLAR LIQUID CHROMATOGRAPHY. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2013.825852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Dubey S, Bhandari AM, Kapoor RN. I. Reactions of Uranium pentaethoxide with carboxylic acids. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2014. [DOI: 10.1515/znb-1970-0107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Reactions of carboxylic acids in different stoichiometric ratios have been carried out under anhydrous conditions, the compounds of the type U (OEt) 4 (OOCR), U (OEt) 3(OOCR)2 U (OEt) 2 (OOCR) 3 and U (OEt) (OOCR)4 (where R is CH3, C2H5, C3H7 and C6H5) have been isolated. Lactic acid yielded the compounds of the type U (OEt)3 (C3H4O3), U (OEt) (C3H4O3)2, U2 (C3H4O3) 5 and U (C3H4O3) (C3H5O3). Determination of molecular weight of some of the soluble derivatives of benzoic acid, suggest them to be dimeric in boiling benzene.
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Chiu K, Dubey S, Bull D. Optimal Duration of Cardiac Monitoring in Metastatic HER2-positive Breast Cancer Patients Receiving Trastuzumab. Clin Oncol (R Coll Radiol) 2014. [DOI: 10.1016/j.clon.2014.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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68
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Dubey S, Kalia Y. Understanding the poor iontophoretic transport of lysozyme across the skin: When high charge and high electrophoretic mobility are not enough. J Control Release 2014; 183:35-42. [DOI: 10.1016/j.jconrel.2014.03.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 03/15/2014] [Indexed: 10/25/2022]
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Chiu K, Dubey S, Bull D. Optimal Duration of Cardiac Monitoring in Metastatic HER2 Positive Breast Cancer Patients Receiving Trastuzumab. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu064.2] [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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70
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Chhaniwal VK, Kihiko JM, Dubey S, Shearon G, Javidi B, Anand A. Digital holographic testing of biconvex lenses. APPLIED OPTICS 2013; 52:8714-8722. [PMID: 24513936 DOI: 10.1364/ao.52.008714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 11/18/2013] [Indexed: 06/03/2023]
Abstract
Lenses are one of the most important optical elements for manipulation of wavefronts. For their proper selection, the wavefronts produced by the lenses should be analyzed. Digital holography is a tool which provides whole-field reconstructions of wavefronts, and here the use of digital holographic interferometry in complete characterization of wavefronts from lenses is investigated. Digital holograms of the wavefront from the test lens are recorded for various positions of the test lens from a point source. The reconstructed phase of the wavefront from the test lens is compared with a digitally inputted wavefront for measurement of parallelism as well as curvature. The focal length of the test lens is computed by measuring the change in curvature of the wavefront for two positions of the test lens. The radius of curvature of the test lens is determined by using the test lens in the reflection mode. Refractive index of the lens material is also determined using this method. Detailed theoretical and experimental analysis is provided.
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Thakur S, Kumar A, Dubey S, Saxena R, Peters A, Singhal A. A novel mutation of the leptin gene in an Indian patient. Clin Genet 2013; 86:391-3. [DOI: 10.1111/cge.12289] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 09/21/2013] [Accepted: 09/23/2013] [Indexed: 11/29/2022]
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72
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Dubey S, Hasan M, Kapoor RN. Salicylate of Uranium. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.197800019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cohn AL, Tabernero J, Maurel J, Nowara E, Sastre J, Chuah BYS, Kopp MV, Sakaeva DD, Mitchell EP, Dubey S, Suzuki S, Hei YJ, Galimi F, McCaffery I, Pan Y, Loberg R, Cottrell S, Choo SP. A randomized, placebo-controlled phase 2 study of ganitumab or conatumumab in combination with FOLFIRI for second-line treatment of mutant KRAS metastatic colorectal cancer. Ann Oncol 2013; 24:1777-1785. [PMID: 23510984 DOI: 10.1093/annonc/mdt057] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Targeted agents presently available for mutant KRAS metastatic colorectal cancer (mCRC) are bevacizumab and aflibercept. We evaluated the efficacy and safety of conatumumab (an agonistic monoclonal antibody against human death receptor 5) and ganitumab (a monoclonal antibody against the type 1 insulin-like growth factor receptor) combined with standard FOLFIRI chemotherapy as a second-line treatment in patients with mutant KRAS mCRC. PATIENTS AND METHODS Patients with mutant KRAS metastatic adenocarcinoma of the colon or rectum refractory to fluoropyrimidine- and oxaliplatin-based chemotherapy were randomized 1 : 1 : 1 to receive intravenous FOLFIRI plus conatumumab 10 mg/kg (Arm A), ganitumab 12 mg/kg (Arm B), or placebo (Arm C) Q2W. The primary end point was progression-free survival (PFS). RESULTS In total, 155 patients were randomized. Median PFS in Arms A, B, and C was 6.5 months (HR, 0.69; P = 0.147), 4.5 months (HR, 1.01; P = 0.998), and 4.6 months, respectively; median overall survival was 12.3 months (HR, 0.89; P = 0.650), 12.4 months (HR, 1.27; P = 0.357), and 12.0 months; and objective response rate was 14%, 8%, and 2%. The most common grade ≥3 adverse events in Arms A/B/C included neutropenia (30%/25%/18%) and diarrhea (18%/2%/10%). CONCLUSIONS Conatumumab, but not ganitumab, plus FOLFIRI was associated with a trend toward improved PFS. Both combinations had acceptable toxicity.
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Castella B, Golay J, Monney JC, Golay P, Mebert K, Dubey S. Melanism, body condition and elevational distribution in the asp viper. J Zool (1987) 2013. [DOI: 10.1111/jzo.12037] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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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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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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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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80
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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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82
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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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84
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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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85
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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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86
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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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87
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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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88
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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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91
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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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92
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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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93
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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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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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97
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Mukhtyar C, Lee R, Brown D, Carruthers D, Dasgupta B, Dubey S, Flossmann O, Hall C, Hollywood J, Jayne D, Jones R, Lanyon P, Muir A, Scott D, Young L, Luqmani RA. Modification and validation of the Birmingham Vasculitis Activity Score (version 3). Ann Rheum Dis 2008; 68:1827-32. [PMID: 19054820 DOI: 10.1136/ard.2008.101279] [Citation(s) in RCA: 718] [Impact Index Per Article: 44.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Comprehensive multisystem clinical assessment using the Birmingham Vasculitis Activity score (BVAS) is widely used in therapeutic studies of systemic vasculitis. Extensive use suggested a need to revise the instrument. The previous version of BVAS has been revised, according to usage and reviewed by an expert committee. OBJECTIVE To modify and validate version 3 of the BVAS in patients with systemic vasculitis. METHODS The new version of BVAS was tested in a prospective cross-sectional study of patients with vasculitis. RESULTS The number of items was reduced from 66 to 56. The subscores for new/worse disease and persistent disease were unified. In 313 patients with systemic vasculitis, BVAS(v.3) correlated with treatment decision (Spearman's r(s) = 0.66, 95% CI 0.59 to 0.72), BVAS1 of version 2 (r(s) = 0.94, 95% CI 0.92 to 0.96), BVAS2 of version 2 in patients with persistent disease (r(s) = 0.60, 95% CI 0.21 to 0.83), C-reactive protein levels (r(s) = 0.43, 95% CI 0.31 to 0.54), physician's global assessment (r(s) = 0.91, 95% CI 0.89 to 0.93) and vasculitis activity index (r(s) = 0.88, 95% CI 0.86 to 0.91). The intraclass correlation coefficients for reproducibility and repeatability were 0.96 (95% CI 0.95 to 0.97) and 0.96 (95% CI 0.92 to 0.97), respectively. In 39 patients assessed at diagnosis and again at 3 months, the BVAS(v.3) fell by 17 (95% CI 15 to 19) units (p<0.001, paired t test). CONCLUSION BVAS(v.3) demonstrates convergence with BVAS(v.2), treatment decision, physician global assessment of disease activity, vasculitis activity index and C-reactive protein. It is repeatable, reproducible and sensitive to change. The new version of BVAS is validated for assessment of systemic vasculitis.
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Dubey S, Kaur P, Jindal DP, Satyanarayan YD, Piplani P. Synthesis, evaluation and QSAR studies of 16-(4 & 3,4-substituted) benzylidene androstene derivatives as anticancer agents. Med Chem 2008; 4:229-36. [PMID: 18473915 DOI: 10.2174/157340608784325133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In a systematic effort aimed at identifying new steroidal cytotoxic agents with potent antipoliferative activity against cancer cells and developing their QSAR models, series of 4-nitro, 4-isopropyl, 4-methoxy and 3,4-dimethoxy substituted benzylidene androst-5-ene derivatives were synthesized. The selected compounds were evaluated for antineoplastic activity against a panel of three human cell lines-breast, CNS and lungs at NCI, Bethesda, USA. The results presented herein reports that compounds 7, 9, 10, 15,16, 18, 20-25, 30, 32-36 and 44 have been found to be active anticancer agents. The QSAR of 20 compounds was performed separately for each cell line and best-fit QSAR models are developed. The QSAR models obtained have shown significant correlations (r(2) range: 0.9163 to 0.8164) and good predictive performance (q(2) range: 0.8499- 0.6320). The validation of models has also been performed using the test set of compounds 5, 15 and 44.
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100
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Dubey S, Su R, Nalbandian G, Hwang J, Jahan TM. Patterns of systemic chemotherapy in resectable non-small cell lung cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.7590] [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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