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Li D, Parvez W, Tiwari M, Jones M, Tufail M, Agrawal S, Bennett J, Sudhir R. EP13.01-001 The Burden of Incidental Extra-thoracic Positron Emission Tomography-CT (PET-CT) Findings in Thoracic Malignancies. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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2
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Tiwari M, Verma M, Singh P, Bharti D. Role of Fok I VDR polymorphism in TB risk assessment; A Study in Central India population. Meta Gene 2021. [DOI: 10.1016/j.mgene.2021.100896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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3
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Saxena A, Kumar V, Tiwari M, Kumar S, Kumar U. Research Article Non-synonymous de novo gene mutations in Wilms’ Tumor: Identification and characterization of new variants of WT1 and WT2 loci in Indian Population. Genet Mol Res 2021. [DOI: 10.4238/gmr18958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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4
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López-Mendilaharsu M, Giffoni B, Monteiro D, Prosdocimi L, Vélez-Rubio GM, Fallabrino A, Estrades A, Santos AS, Lara PH, Pires T, Tiwari M, Bolten AB, Marcovaldi MÂ. Multiple-threats analysis for loggerhead sea turtles in the southwest Atlantic Ocean. ENDANGER SPECIES RES 2020. [DOI: 10.3354/esr01025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Priority-setting approaches for widely distributed and long-lived species can be challenging. This is especially true for sea turtles, which are species of conservation concern. The aim of this study was to conduct a detailed analysis of threats to identify, quantify and prioritize the main impacts to the loggerhead Caretta caretta population in the southwest Atlantic (SWA) region. A matrix of relative threats was constructed. Threats were identified and classified for 8 different life stages (nesting females, eggs, hatchlings, swim-frenzy transitional stage, juveniles-neritic, juveniles-oceanic, adults-neritic, adults-oceanic) and for 3 ecosystems inhabited by sea turtles (terrestrial, neritic and oceanic). Results indicated that fisheries bycatch represents a major threat for loggerheads in the SWA. The trawl fishery was identified as the main source of mortality for neritic juvenile and adult turtles, whereas juveniles in oceanic areas are mostly impacted by surface longlines. In terrestrial environments, eggs and hatchlings are mainly affected by habitat alteration and by native and exotic predators. Loggerheads have shown a positive nesting trend at their main nesting beaches in the SWA, probably due to long-term conservation efforts to reduce mortality of the different life stages within the terrestrial zone. However, the high mortality rates of juveniles and sub-adults documented at some known foraging grounds represent a reason for concern, as this may affect the overall population trend in the future. This threat analysis provides a tool to review the goals of national action plans, prioritize actions and optimize the allocation of management resources.
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Affiliation(s)
- M López-Mendilaharsu
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - B Giffoni
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - D Monteiro
- Núcleo de Educação e Monitoramento Ambiental - NEMA, Rua Maria Araújo 450, 96207-480 Rio Grande, RS, Brazil
- Laboratório de Ecologia e Conservação da Megafauna Marinha, EcoMega, Universidade Federal do Rio Grande, FURG, 96203-900 Rio Grande, RS, Brazil
| | - L Prosdocimi
- Programa Regional de Investigación y Conservación de Tortugas Marinas de la Argentina (PRICTMA), 1609 Buenos Aires, Argentina
| | - GM Vélez-Rubio
- Karumbé NGO, Zoo Villa Dolores, 11600 Montevideo, Uruguay
- Centro Universitario Regional del Este (CURE), Universidad de la República, 27000 Rocha, Uruguay
| | - A Fallabrino
- Karumbé NGO, Zoo Villa Dolores, 11600 Montevideo, Uruguay
| | - A Estrades
- Karumbé NGO, Zoo Villa Dolores, 11600 Montevideo, Uruguay
| | - AS Santos
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - PH Lara
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - T Pires
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - M Tiwari
- NOAA-National Marine Fisheries Service, Marine Turtle Ecology & Assessment Program, Southwest Fisheries Science Center, La Jolla, California 92034, USA
| | - AB Bolten
- Archie Carr Center for Sea Turtle Research and Department of Biology, University of Florida, Gainesville, Florida 32611, USA
| | - MÂ Marcovaldi
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
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Singh AD, Ghosh AK, Mehrotra RC, Patnaik R, Tiwari M. Recent advances in understanding Neogene climatic evolution: Indian perspective. PINSA 2020. [DOI: 10.16943/ptinsa/2020/49776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Saxena A, Tiwari M, Kumar R, Aprajita, Kumar A, Singh C, Agarwal M. Research Article Impact of the Y-chromosome gene on SOX9 stem cell expression in non-obstructive azoospermic cases. Genet Mol Res 2020. [DOI: 10.4238/gmr18464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Pandit G, Sahu S, Ajmal P, Tiwari M, Bhangare R. Application of 210Po isotope dating for chronological assessment of organochlorine pesticides in estuarine sediment. Journal of Radiation Research and Applied Sciences 2019. [DOI: 10.1016/j.jrras.2014.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- G.G. Pandit
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - S.K. Sahu
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - P.Y. Ajmal
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - M. Tiwari
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - R.C. Bhangare
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
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Tiwari M, Rathod TD, Ajmal PY, Bhangare RC, Sahu SK. Distribution and characterization of microplastics in beach sand from three different Indian coastal environments. Mar Pollut Bull 2019; 140:262-273. [PMID: 30803642 DOI: 10.1016/j.marpolbul.2019.01.055] [Citation(s) in RCA: 159] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/24/2019] [Accepted: 01/24/2019] [Indexed: 05/12/2023]
Abstract
The occurrence of microplastic particles were evaluated on beaches along the Indian coast from three different locations Girgaon Mumbai (Arabian sea coast), Tuticorin, and Dhanushkodi (Bay of Bengal coast). Density separation method was adopted for isolation of microplastics from sand. Isolated microplastics were characterized using three different analytical techniques e.g. fluorescence microscopy (after staining with Nile Red), FTIR and SEM-EDS techniques. Microplastic concentrations in beach sands were from 45 ± 12 # MP kg-1 to 220 ± 50 # MP kg-1 of dry sand. The order of abundance of plastic type was polyethylene (43%) > polyethylene terephthalate (17.3%) ≈ polystyrene (17%) > polypropylene (12.3%) > Others (11%) > polyvinylchloride (1.33%), and very similar profile was observed for all monitored locations. SEM images show microplastics surfaces with characteristic cracks, suggests their polymer aging, mechanical and oxidative weathering, which was found highest for the microplastics collected from Mumbai.
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Affiliation(s)
- M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - T D Rathod
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - P Y Ajmal
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - R C Bhangare
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India.
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Bhangare RC, Ajmal PY, Rathod TD, Tiwari M, Sahu SK. Experimental and Theoretical Determination of Henry's Law Constant for Polychlorinated Biphenyls: Its Dependence on Solubility and Degree of Chlorination. Arch Environ Contam Toxicol 2019; 76:142-152. [PMID: 30361943 DOI: 10.1007/s00244-018-0577-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 10/15/2018] [Indexed: 06/08/2023]
Abstract
The fate of a pollutant in the environment depends on its interaction with the surroundings. Henry's law constant (HLC) is one of the important properties useful for assessment of environmental risk and estimation of mass transfer of the pollutant between water and air. Estimation of HLC is relatively a difficult task for many of the organic pollutants due to their very low aqueous solubility. People have attempted the measurement of HLC for persistent organic pollutants, such as polychlorinated biphenyls (PCBs), but due to the difficulty in estimation, there is a variation of approximately 2-3 orders of magnitude in reported values of HLC for PCBs in the literature. A study was performed for estimation of HLC for PCBs using the static method with a modification that eliminates any disturbance in equilibrium due to sampling and also avoids removal or addition of material in or out of the system unlike the conventional methods. The results were consistent with the literature values. The experimental values of HLC ranged from 0.004 to 0.08 for different congeners. All of the experimental values were in agreement with the literature values. The experimental data was further used for deriving a correlation equation for theoretical estimation of the HLC from aqueous solubility and chlorination number. The equation gave a very good estimation of HLC values for all the PCBs congeners except single- and double-chlorinated congeners. The theoretically predicted values were also found to be in close agreement with the reported HLC values.
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Affiliation(s)
- R C Bhangare
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - P Y Ajmal
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - T D Rathod
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India.
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Sui XM, Tiwari M, Greenfeld I, Khalfin RL, Meeuw H, Fiedler B, Wagner HD. Extreme scale-dependent tensile properties of epoxy fibers. EXPRESS POLYM LETT 2019. [DOI: 10.3144/expresspolymlett.2019.86] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Mohan M, Sreelakshmi U, Vishnu Sagar MK, Gopikrishna VG, Pandit GG, Sahu SK, Tiwari M, Ajmal PY, Kannan VM, Abdul Shukkur M, Krishnan KP. Rate of sediment accumulation and historic metal contamination in a tidewater glacier fjord, Svalbard. Mar Pollut Bull 2018; 131:453-459. [PMID: 29886971 DOI: 10.1016/j.marpolbul.2018.04.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 04/13/2018] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
The sedimentation rates in Arctic fjords are influenced by the changes in the glacial inputs. The recent studies have indicated the retreat of glaciers due to climate change and subsequent increase in melt water outflow with high content of debris. The debris may contain natural and anthropogenically originated contaminants. The present study analysed the sedimentation rate in inner Kongsfjorden, Ny-Ålesund, Svalbard using 210Pb/210Po dating technique. The sedimentation rate ranged between 0.22 and 0.37 cm/year during the last 112 years. The average sedimentation rate obtained was 0.28 cm/y. The rate has been increased during the last 20 years and it might be due to the increased influx of glacial melt water containing debris. Metals and other elements showed an increasing trend towards the surface and observed high deposition rate since 1970s, indicating influence of industrial emissions and it can be a potential threat to Arctic biota.
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Affiliation(s)
- Mahesh Mohan
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India.
| | - U Sreelakshmi
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - M K Vishnu Sagar
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - V G Gopikrishna
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - G G Pandit
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - M Tiwari
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - P Y Ajmal
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - V M Kannan
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - M Abdul Shukkur
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - K P Krishnan
- National Centre for Antarctic and Ocean Research, Goa, India
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Rathod T, Tiwari M, Maity S, Sahu S, Pandit G. Multi-element detection in sea water using preconcentration procedure and EDXRF technique. Appl Radiat Isot 2018; 135:57-60. [DOI: 10.1016/j.apradiso.2018.01.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 11/22/2017] [Accepted: 01/12/2018] [Indexed: 11/28/2022]
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13
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Srivastav VK, Tiwari M, Zhang X, Yao XJ. Synthesis and Antiretroviral Activity of 6-Acetyl-coumarin Derivatives against HIV-1 Infection. Indian J Pharm Sci 2018. [DOI: 10.4172/pharmaceutical-sciences.1000335] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Tiwari M, Sahu SK, Pandit GG. Distribution of PAHs in different compartment of creek ecosystem: Ecotoxicological concern and human health risk. Environ Toxicol Pharmacol 2017; 50:58-66. [PMID: 28131077 DOI: 10.1016/j.etap.2017.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 01/09/2017] [Accepted: 01/13/2017] [Indexed: 06/06/2023]
Abstract
We report levels of polycyclic aromatic hydrocarbons in sediment, seawater, fish and crab samples from Thane creek, India. Concentrations of sixteen USEPA PAH in sediments varies from 874 to 1925ngg-1, dry weight (dw) in winter, between 219-495ngg-1 in summer. In seawater Σ16 PAHs concentration during winter was recorded 706±193ngL-1, and during summer 337±79ngL-1. Total concentrations of PAHs in consumable portion of lizard fish, bombay duck and crab were found 156.8±18 and 122±24.5ngg-1, 117.4±17.65ngg-1 and 95.8±16.2ngg-1, 348±94.5 and 95.62±31.9ngg-1 wet weight (ww) in summer and winter respectively. PAHs concentration were compared with sediments quality guidelines viz. ERL-ERM, TEL-PEL indexes for finding ecotoxicological risk on marine organism. The ILCR values were above public screening criteria for carcinogens.
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Affiliation(s)
- M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre Trombay, Mumbai 400085, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre Trombay, Mumbai 400085, India
| | - G G Pandit
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre Trombay, Mumbai 400085, India.
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Kapil S, Bairwa D, Bhagat H, Panda N, Bhukal I, Tiwari M. Time to emergence and factors affecting emergence in patinets with aneurysmal subarachnoid hemorrhage following craniotomy: A prospective observational study. Journal of Neuroanaesthesiology and Critical Care 2017. [DOI: 10.1055/s-0038-1646225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- S. Kapil
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - D. Bairwa
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - H. Bhagat
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - N. Panda
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - I. Bhukal
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - M. Tiwari
- Neurosurgery, PGIMER, Chandigarh, India
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Tiwari M, Rawat N, Vats P, Nagoorvali D, Mahajan M, Chauhan MS, Manik RS, Singla SK, Palta P, Singh MK. 89 METHYLATION STATUS OF IGF2/H19 DMR3 REGION AFFECTS IN VITRO BLASTOCYST PRODUCTION IN GOAT (CAPRA HIRCUS). Reprod Fertil Dev 2017. [DOI: 10.1071/rdv29n1ab89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Parthenogenesis has been observed in lower animals but no known instance has been reported in mammals because both maternal and paternal genomes are a fundamental prerequisite for embryogenesis. A major reason for developmental failure of uniparental zygotes is expression of certain genes in a parent-of-origin-specific manner, i.e. genomic imprinting of genes. Out of many imprinted genes identified so far, IGF2/H19 have been extensively studied and known to play an important role in fetal and placental development. Gene IGF2 is expressed by the paternal allele, H19 is transcribed from the maternal allele, and the reciprocal expression of both genes is regulated by the DMR3 region placed upstream of the H19 gene. In the present study we compared the methylation status of IGF2/H19 DMR in parthenogenetic activated (PA) and IVF goat (Capra hircus) blastocyst through bisulphite sequencing. For this, immature oocytes of usable quality were subjected to in vitro maturation and subsequently used for embryo production through parthenogenesis (n = 993) (by calcium ionophore and 6-DMAP activation) and IVF (n = 1096). It was found that embryo production rate at all the embryonic stages (2-cell, 4-cell, 8–16-cell, morula, and blastocyst) was significantly higher (P < 0.05) in parthenogenesis (74.66 ± 3.35%, 61.90 ± 2.73%, 47.83 ± 2.95%, 38.13 ± 5.28%, and 21.11 ± 2.51%, respectively) as compared with IVF (55.21 ± 2.02%, 38.12 ± 2.48%, 28.53 ± 1.67%, 21.57 ± 1.59%, and 8.23 ± 1.02%, respectively). When blastocysts (n = 6 each) were subjected to TUNEL, it was found that PA blastocyst showed significantly higher (P < 0.05) total cell number (217.83 ± 18.80 v. 159.67 ± 13.94) and significantly low (P < 0.05) apoptotic index (2.04 ± 0.25 v. 4.03 ± 0.29) as compared with IVF blastocysts. For the methylation pattern study, we analysed 17 CpG sites on the DMR3 region of the IGF2/H19 gene. Variable methylation pattern was observed within these CpG sites in different clones (n = 15) of PA and IVF blastocyst. The DMR3 region of the IGF2/H19 gene was significantly hypermethylated (P < 0.05) in PA blastocysts as compared with IVF blastocysts (80.39 ± 2.96, 32.55 ± 4.37, respectively), which suggests higher expression of IGF2 in parthenotes. The result suggests IGF2 might play different roles in different species; the same expression pattern of IGF2 is observed in ovine, but a contrary result is found in porcine species. Our results signify the hypermethylation of IGF2/H19 DMR3, which leads to higher expression of IGF2 to support embryonic development at the blastocyst stage.
This work was supported by the NFBSFARA Project on Parthenogenetic Goat (CA-4002), New Delhi, India.
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Venkatachalam P, Priyanka N, Manikandan K, Ganeshbabu I, Indiraarulselvi P, Geetha N, Muralikrishna K, Bhattacharya RC, Tiwari M, Sharma N, Sahi SV. Enhanced plant growth promoting role of phycomolecules coated zinc oxide nanoparticles with P supplementation in cotton (Gossypium hirsutum L.). Plant Physiol Biochem 2017; 110:118-127. [PMID: 27622847 DOI: 10.1016/j.plaphy.2016.09.004] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 07/24/2016] [Accepted: 09/03/2016] [Indexed: 05/21/2023]
Abstract
This report focuses on application of zinc oxide nanoparticles (ZnONPs) carrying phycomolecule ligands as a novel plant growth promoter aimed at increasing the crop productivity. The present investigation examined the effect of ZnONPs on plant growth characteristics, and associated biochemical changes in cotton (Gossypium hirsutum L.) following growth in a range of concentrations (25-200 mg L-l ZnONPs) in combination with 100 mM P in a hydroponic system. Treated plants registered an increase in growth and total biomass by 130.6% and 131%, respectively, over control. Results demonstrated a significant increase in the level of chlorophyll a (141.6%), b (134.7%), carotenoids (138.6%), and total soluble protein contents (179.4%); at the same time, a significant reduction (68%) in the level of malondialdehyde (MDA) in leaves with respect to control. Interestingly, a significant increase in superoxide dismutase (SOD, 264.2%), and peroxidase (POX, 182.8%) enzyme activities followed by a decrease in the catalase (CAT) activity, in response to above treatments. These results suggest that bioengineered ZnONPs interact with meristematic cells triggering biochemical pathways conducive to an accumulation of biomass. Further investigations will map out the mode of action involved in growth promotion.
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Affiliation(s)
- P Venkatachalam
- Department of Biotechnology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India.
| | - N Priyanka
- Department of Biotechnology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India
| | - K Manikandan
- Department of Biotechnology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India
| | - I Ganeshbabu
- Department of Biotechnology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India
| | - P Indiraarulselvi
- Department of Biotechnology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India
| | - N Geetha
- Department of Biotechnology, Mother Teresa Women's University, Kodaikanal, 624 102, Tamil Nadu, India
| | - K Muralikrishna
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110 012, India
| | - R C Bhattacharya
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110 012, India
| | - M Tiwari
- Department of Biology, Western Kentucky University, Bowling Green, KY, 42101, USA
| | - N Sharma
- Department of Biology, Western Kentucky University, Bowling Green, KY, 42101, USA
| | - S V Sahi
- Department of Biology, Western Kentucky University, Bowling Green, KY, 42101, USA
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Tiwari M, Sahu SK, Bhangare RC, Pandit GG. Polonium in size fractionated mainstream cigarette smoke, predicted deposition and associated internal radiation dose. J Environ Radioact 2016; 162-163:251-257. [PMID: 27294663 DOI: 10.1016/j.jenvrad.2016.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/05/2016] [Indexed: 06/06/2023]
Abstract
In this study, size fractionated mass and 210Po activity concentrations in mainstream cigarette smoke (MCS) were monitored for three popular cigarette brands. Size segregated collection of MCS was carried out using a cascade type impactor, while mass and 210Po activity concentration were analyzed gravimetrically and alpha spectrometry (following the radiochemical separation) respectively. Multiple-Path Particle Dosimetry (MPPD V2.11) model is used for prediction of deposition fraction calculations for the MCS deposition in different compartment of human respiratory tract. The activity concentration of 210Po is founds 10.56 ± 2.46 mBq per cigarette for the tested cigarette brands. 210Po size distribution indicates most of this associates with fine fraction (Dp < 2.23 μm) of cigarette smoke. The committed annual effective dose to smokers (smoking on an average 20 cigarette a day), considering the 210Po and 210Pb concentrations (assuming it is in secular equilibrium with 210Po) in MCS, was estimated between 0.22 and 0.40 mSv, with mean value of 0.30 mSv for tested cigarette brands. Considering the risk factor of fatal cancer due to radiation exposure of lung (exposure time of 30 years); the average collective estimated fatal cancer risk is estimated as 1.5 × 10-4 due to 210Po and 210Pb exposure to smokers.
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Affiliation(s)
- M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - R C Bhangare
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - G G Pandit
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India.
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Tiwari M, Sahu SK, Pandit GG. Distribution and estrogenic potential of endocrine disrupting chemicals (EDCs) in estuarine sediments from Mumbai, India. Environ Sci Pollut Res Int 2016; 23:18789-18799. [PMID: 27316650 DOI: 10.1007/s11356-016-7070-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 06/13/2016] [Indexed: 06/06/2023]
Abstract
Endocrine disrupting chemicals (EDCs) are responsible for inappropriate development and they alter the hormonal and homeostatic systems of organism. Phthalates (PAEs), bisphenol A (BPA) and other EDCs were monitored in surface sediments at different stations across Thane Creek, India. Analysis of PAEs was carried out using GC-MS technique, while BPA and other EDCs were analyzing on UPLC-PDA instrument. Di-n-butyl phthalate (DBP) had the highest concentration among all fourteen analyzed phthalates ranges between 0.13 and 0.4 mg kg(-1); and was detectable in all sediment samples. Strong correlation (r = 0.95, p < 0.01) was observed between total organic carbon (TOC, %) and total PAEs. BPA was also detected in all samples; average BPA concentration varies from 16.3 to 35.79 μg kg(-1) with mean value 25.15 μg kg(-1) dry weight of sediment. Synthetic EDCs such as 4-para-nonylphenol (NP) and 4-tert-octylphenol (OP) were also analyzed; and their average concentrations were founds to be 356.5 and 176 μg kg(-1), respectively. Estrone (E1), 17β-estradiol (E2), and 17α-ethinylestradiol (EE2) were the main contributors to the overall estradiol equivalent concentration (EEQs) in sediment, their average total percentage contributions is more than 90 %.
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Affiliation(s)
- M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - G G Pandit
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, 400085, India.
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Chavan P, Bhat V, Tiwari M, Gavhane U, Pal SK. Comparison of Complete Blood Count Parameters between Venous and Capillary Blood in Oncology Patients. J Lab Physicians 2016; 8:65-6. [PMID: 27013818 PMCID: PMC4785771 DOI: 10.4103/0974-2727.176238] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Preeti Chavan
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Navi Mumbai, Maharashtra, India
| | - Vivek Bhat
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Navi Mumbai, Maharashtra, India
| | - Manikchandra Tiwari
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Navi Mumbai, Maharashtra, India
| | - Umakant Gavhane
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Navi Mumbai, Maharashtra, India
| | - Sanjay Kumar Pal
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Navi Mumbai, Maharashtra, India
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Shrestha R, Shrestha A, Tiwari M, Ranabhat S, Maharjan S. Role of Eosinophils in Acute Appendicitis. JNMA J Nepal Med Assoc 2015; 53:12-17. [PMID: 26983041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
INTRODUCTION High negative appendectomy rate still prevails on conventional histologic examination. Increased mural eosinophilic infiltrate had been observed in acute appendicitis. Present study aimed to evaluate the role of mural eosinophils in clinically suspected acute appendicitis but histological normal appendix, as an indicator of acute inflammation, alone or in association with edema and to estimate the cut off value for high eosinophil count for the diagnosis of acute appendicitis. METHODS A prospective cross sectional study was conducted on appendectomy specimens which were categorized into three groups of classical acute appendicitis, negative appendectomy and control. HandE and Giemsa stained section were studied for the presence of mural eosinophilic infiltrate, mast cells and edema. RESULTS Of total 170 cases, group 1 comprised of 68 cases, group 2 consisted of 78 cases and group 3 consisted of 24 cases. Mean eosinophil and mast cell counts in the muscularis propria were significantly higher in CAA and NA categories when compared to control group. Positive association was found between high eosinophil count and edema in CAA and NA categories. Cut off value of ≥6/ mm2 for mural eosinophil count was not significantly different in between NA and control categories. CONCLUSIONS Increased mural eosinophils were significantly present in acute appendicitis and clinically suspected acute appendicitis but histological normal appendix when compared with control group. Sole presence of increased mural eosinophils might represent acute inflammation. However, cut off value for high eosinophil count could not be established to suggest acute appendicitis.
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Affiliation(s)
- R Shrestha
- Department of Pathology, Nepalese Army Institute of Health Sciences, Kathmandu, Nepal
| | - A Shrestha
- Department of Obstetrics and Gynaecology, Chitwan Medical College Teaching Hospital, Bharatpur, Nepal
| | - M Tiwari
- Department of Pathology, Chitwan Medical College Teaching Hospital, Bharatpur, Chitwan, Nepal
| | - S Ranabhat
- Department of Pathology, Chitwan Medical College Teaching Hospital, Bharatpur, Chitwan, Nepal
| | - S Maharjan
- Department of Pathology, Chitwan Medical College Teaching Hospital, Bharatpur, Chitwan, Nepal
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Sahu SK, Tiwari M, Bhangare RC, Pandit GG. Enrichment and particle size dependence of polonium and other naturally occurring radionuclides in coal ash. J Environ Radioact 2014; 138:421-426. [PMID: 24813148 DOI: 10.1016/j.jenvrad.2014.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 03/25/2014] [Accepted: 04/15/2014] [Indexed: 06/03/2023]
Abstract
Coal fired thermal power contributes 70% of power in India. Coal fired power generation results in huge amounts of fly ash and bottom ash of varying properties. Coal, which contains the naturally occurring radionuclides, on burning results in enrichment of these radionuclides in the ashes. In the present study, coal, bottom ash and fly ash samples collected from six coal-fired power plants in India were measured for (210)Po using alpha spectrometry and for natural U, (226)Ra, (232)Th and (40)K by an HPGe γ-ray spectrometer. (210)Po in fly ash ranged from 25.7 to 70 Bq/kg with a mean value of 40.5 Bq/kg. The range and mean activities of (238)U, (226)Ra, (232)Th, (40)K in fly ash were 38.5-101 (78.1), 60-105.7 (79), 20-125 (61.7) and 43.6-200 (100) Bq/kg respectively. Fly ash and bottom ash contains two to five times more natural radionuclides than feed coal. The results were compared with the available data from earlier studies in other countries. The effect of particle size on enrichment factor of the nuclides in fly ash was studied. (210)Po showed the largest size dependence with its concentration favoring the smaller particle size while (232)Th showed least size dependence. (238)U and (226)Ra showed behavior intermediate to that of (210)Po and (232)Th. Also the correlation between sulfur content of the feed coal and activity of (210)Po was investigated. Increased sulfur content in feed coal enhanced enrichment of (210)Po in ash.
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Affiliation(s)
- S K Sahu
- Environmental Monitoring & Assessment Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - M Tiwari
- Environmental Monitoring & Assessment Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - R C Bhangare
- Environmental Monitoring & Assessment Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - G G Pandit
- Environmental Monitoring & Assessment Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
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Balamurugan AN, Naziruddin B, Lockridge A, Tiwari M, Loganathan G, Takita M, Matsumoto S, Papas K, Trieger M, Rainis H, Kin T, Kay TW, Wease S, Messinger S, Ricordi C, Alejandro R, Markmann J, Kerr-Conti J, Rickels MR, Liu C, Zhang X, Witkowski P, Posselt A, Maffi P, Secchi A, Berney T, O’Connell PJ, Hering BJ, Barton FB. Islet product characteristics and factors related to successful human islet transplantation from the Collaborative Islet Transplant Registry (CITR) 1999-2010. Am J Transplant 2014; 14:2595-606. [PMID: 25278159 PMCID: PMC4282081 DOI: 10.1111/ajt.12872] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/30/2014] [Accepted: 06/18/2014] [Indexed: 02/05/2023]
Abstract
The Collaborative Islet Transplant Registry (CITR) collects data on clinical islet isolations and transplants. This retrospective report analyzed 1017 islet isolation procedures performed for 537 recipients of allogeneic clinical islet transplantation in 1999-2010. This study describes changes in donor and islet isolation variables by era and factors associated with quantity and quality of final islet products. Donor body weight and BMI increased significantly over the period (p<0.001). Islet yield measures have improved with time including islet equivalent (IEQ)/particle ratio and IEQs infused. The average dose of islets infused significantly increased in the era of 2007-2010 when compared to 1999-2002 (445.4±156.8 vs. 421.3±155.4×0(3) IEQ; p<0.05). Islet purity and total number of β cells significantly improved over the study period (p<0.01 and <0.05, respectively). Otherwise, the quality of clinical islets has remained consistently very high through this period, and differs substantially from nonclinical islets. In multivariate analysis of all recipient, donor and islet factors, and medical management factors, the only islet product characteristic that correlated with clinical outcomes was total IEQs infused. This analysis shows improvements in both quantity and some quality criteria of clinical islets produced over 1999-2010, and these parallel improvements in clinical outcomes over the same period.
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Affiliation(s)
- A N Balamurugan
- Schulze Diabetes Institute, Department of Surgery, University of MinnesotaMinneapolis, MN
- * Corresponding authors: Appakalai N. Balamurugan, and Franca B. Barton,
| | - B Naziruddin
- Baylor Annette C. and Harold C. Simmons Transplant InstituteDallas, TX
| | - A Lockridge
- Schulze Diabetes Institute, Department of Surgery, University of MinnesotaMinneapolis, MN
| | - M Tiwari
- Schulze Diabetes Institute, Department of Surgery, University of MinnesotaMinneapolis, MN
| | - G Loganathan
- Schulze Diabetes Institute, Department of Surgery, University of MinnesotaMinneapolis, MN
| | - M Takita
- Baylor Annette C. and Harold C. Simmons Transplant InstituteDallas, TX
| | - S Matsumoto
- Research and Development Center, Otsuka Pharmaceutical Factory, Inc.Tokushima, Japan
| | - K Papas
- Institute for Cellular Transplantation, University of ArizonaTucson, AZ
| | | | - H Rainis
- The EMMES CorporationRockville, MD
| | - T Kin
- Clinical Islet Laboratory, University of AlbertaEdmonton, AB
| | - T W Kay
- St. Vincent's HospitalMelbourne, Australia
| | - S Wease
- The EMMES CorporationRockville, MD
| | - S Messinger
- Department of Public Health Services, University of MiamiMiami, FL
| | - C Ricordi
- Diabetes Research Institute, University of MiamiMiami, FL
| | - R Alejandro
- Diabetes Research Institute, University of MiamiMiami, FL
| | - J Markmann
- Department of Surgery, Massachusetts General HospitalBoston, MA
| | | | - M R Rickels
- Department of Medicine, University of PennsylvaniaPhiladelphia, PA
| | - C Liu
- Department of Surgery, University of PennsylvaniaPhiladelphia, PA
| | - X Zhang
- Feinberg School of Medicine, Northwestern UniversityChicago, IL
| | - P Witkowski
- Department of Surgery, University of ChicagoChicago, IL
| | - A Posselt
- Department of Surgery, University of California, San FranciscoSan Francisco, CA
| | - P Maffi
- Vita-Salute, San Raffaele UniversityMilan, Italy
| | - A Secchi
- Vita-Salute, San Raffaele UniversityMilan, Italy
| | - T Berney
- Department of Surgery, Geneva University HospitalGeneva, Switzerland
| | - P J O’Connell
- National Pancreas Transplant Unit, University of Sydney at Westmead HospitalSydney, Australia
| | - B J Hering
- Schulze Diabetes Institute, Department of Surgery, University of MinnesotaMinneapolis, MN
| | - F B Barton
- The EMMES CorporationRockville, MD
- * Corresponding authors: Appakalai N. Balamurugan, and Franca B. Barton,
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Georgiev G, Beltran del Rio M, Gruessner A, Tiwari M, Cercone R, Delbridge M, Grigsby B, Gruessner R, Rilo H. Patient quality of life and pain improve after autologous islet transplantation (AIT) for treatment of chronic pancreatitis: 53 patient series at the University of Arizona. Pancreatology 2014; 15:40-5. [PMID: 25455347 DOI: 10.1016/j.pan.2014.10.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 09/07/2014] [Accepted: 10/10/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND/OBJECTIVES Pancreatectomy with autologous islet transplantation has slowly been proving to be an effective way of treating chronic pancreatitis while lessening the effects of the concomitant surgical diabetes of pancreatectomy alone. Assessing patient quality of life and pain after the procedure is particularly important as intractable pain is the main complaint for which patients undergo total pancreatectomy. METHODS We used the Rand SF-36 and McGill pain questionnaires, and Visual Analogue Scale to assess patients preoperatively for quality of life and pain resulting from life with chronic pancreatitis. After undergoing total pancreatectomy with autologous islet transplantation (TPAIT), patients were followed with surveys administered at 1 month, 6 months, and 1 year to evaluate changes in their quality of life and pain experienced. RESULTS Significant improvement was reported in all components of every questionnaire within a year after surgery. Furthermore, patient reported mean scores on quality of life were found to fall within the range of the general population. CONCLUSIONS From our experience with 53 patients at the University of Arizona, after pancreatectomy with autologous islet transplantation patients reported a higher quality of life when compared to preoperative values, as well as reduced levels of pain.
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Affiliation(s)
- G Georgiev
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA; Center for Diseases of the Pancreas, Northshore-LIJ, Department of Surgery, Manhasset, NY 11030, USA; Department of Physiological Sciences, University of Arizona, Tucson, AZ 85724, USA
| | - M Beltran del Rio
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA; Center for Diseases of the Pancreas, Northshore-LIJ, Department of Surgery, Manhasset, NY 11030, USA
| | - A Gruessner
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA; Mel & Enid Zuckerman College of Public Health, University of Arizona, Tucson 85724, AZ, USA
| | - M Tiwari
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA; Center for Diseases of the Pancreas, Northshore-LIJ, Department of Surgery, Manhasset, NY 11030, USA
| | - R Cercone
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA; Center for Diseases of the Pancreas, Northshore-LIJ, Department of Surgery, Manhasset, NY 11030, USA
| | - M Delbridge
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA
| | - B Grigsby
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA
| | - R Gruessner
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA; Department of Surgery, University of Arizona, Tucson 85724, AZ, USA
| | - H Rilo
- Institute for Cellular Transplantation, Department of Surgery, University of Arizona, Tucson, AZ 85724, USA; Center for Diseases of the Pancreas, Northshore-LIJ, Department of Surgery, Manhasset, NY 11030, USA; Department of Physiological Sciences, University of Arizona, Tucson, AZ 85724, USA; Department of Surgery, University of Arizona, Tucson 85724, AZ, USA; Bio5 Institute, Department of Immunology and Department of Molecular and Cellular Biology, University of Arizona, Tucson 85724, AZ, USA.
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Abstract
Animal-type melanoma is a low-grade malignant tumor with a good prognosis. Although it is common in old grey horses, the tumor is exceedingly rare in humans. Only 173 cases have been reported till 2011. We report a case in a 38-year-old woman who had the neoplasm in the left labium majus since birth. The tumor was composed of heavily melanized polygonal tumor cells with mildly atypical nuclei proliferating diffusely and in nests in the dermis and subcutis with invasion of hair follicles and nerve bundles. Mitotic figures were not seen. Regional lymph nodes were not enlarged. Present case describes a patient with animal-type melanoma who has had the lesion since birth and who is still living despite having the tumor for 38 years. It attests to the fact that this tumor has indolent biologic behaviour despite being malignant. Mistaking this case for other highly pigmented melanocytic tumors, benign or malignant, is a potential diagnostic pitfall.DOI: http://dx.doi.org/10.3126/jpn.v4i8.11599 Journal of Pathology of Nepal; Vol.4,No. 8 (2014) 685-687
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Srivastav VK, Tiwari M. k-nearest neighbor molecular field analysis based 3D-QSAR and in silico ADME/T studies of cinnamoyl derivatives as HIV-1 integrase inhibitors. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1183-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Loganathan G, Graham M, Spizzo T, Tiwari M, Lockridge A, Soltani S, Wilhelm J, Balamurugan A, Hering B. Pretreatment of Donor Pigs With a Diet Rich in Soybean Oil Increases the Yield of Isolated Islets. Transplant Proc 2014; 46:1945-9. [DOI: 10.1016/j.transproceed.2014.05.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Tiwari M, Dwivedi UN, Kakkar P. Tinospora cordifolia extract modulates COX-2, iNOS, ICAM-1, pro-inflammatory cytokines and redox status in murine model of asthma. J Ethnopharmacol 2014; 153:326-37. [PMID: 24556222 DOI: 10.1016/j.jep.2014.01.031] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 01/03/2014] [Accepted: 01/27/2014] [Indexed: 05/27/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Tinospora cordifolia (Willd.) Miers is an important constituent of several ayurvedic medicinal preparations. In Ayurveda it is mentioned as "rasayan" and traditionally used for the treatment of asthma, chronic cough besides other ailments. This study was carried out to study the mechanisms involved in protection accorded by extract of Tinospora cordifolia (Tc) stem to asthmatic mice by regulation of oxidative stress, pro-inflammatory mediator release and redox signaling involving NFκB. MATERIALS AND METHODS BALB/c mice were sensitized with intraperitoneal (i.p.) Ovalbumin (Ova) on days 0 and 14, followed by intranasal Ovalbumin (Ova) challenge on days 24 and 27 to generate an in vivo asthma model. Tc extract (hydroalcoholic, 100 mg/kg) and dexamethasone (1 mg/kg) were given orally from day 15 to 23 to the Tc+Ova treated group and Dex+Ova treated group respectively. Oxidative stress parameters e.g. activity of superoxide dismutase (SOD), glutathione reductase (GR), glutathione peroxidase (GPx) and catalase, lipid peroxidation, GSH/GSSG ratio, protein carbonyl content, eosinophil peroxidase, myeloperoxidase activity, and NO release were measured in tissue, blood and bronchoalveolar lavage fluid (BALF). Estimation of cytokines was done in BALF. Western blot analysis was done for IκB α, iNOS, COX-2, iCAM-1 and pJNK MAPKs along with histopathology. RESULTS Tc extract treated mice showed decreased airway hyper-responsiveness, eosinophil count and IgE content in blood as compared to Ova treated asthmatic mice. Increase in activities of SOD, catalase, glutathione reductase, glutathione peroxidase as well as GSH/GSSG ratio was observed while a decrease in MDA formation, protein carbonyl content, eosinophil peroxidase, myeloperoxidase activity and NO release in BALF was seen in Tc treated mice. In BALF, levels of cytokines IL-4 and TNF-α were reduced and IFN-γ levels increased in extract treated mice. At the same time Tc treatment of Ova-challenged mice significantly increased the level of IκB α, cytosolic inhibitor of redox sensitive transcription factor NFκB. Immunoblot analysis revealed considerable decrease in the levels of COX-2, ICAM-1, iNOS, and pJNK. Histopathology and PAS staining also indicate a protective effect of Tc extract in inflammation and mucus hyper-secretion due to goblet cell hyperplasia. CONCLUSION The results suggest a protective effect of Tc extract against oxidative stress, pro-inflammatory mediator release and redox signaling in the murine model of asthma. The Tc extract shows therapeutic potential for management of asthmatic inflammation and other lung inflammatory conditions.
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Affiliation(s)
- M Tiwari
- Herbal Research Section, Food Drug & Chemical Toxicology Division, CSIR - Indian Institute of Toxicology Research, P.O. Box 80, M.G. Marg, Lucknow 226001, Uttar Pradesh, India.
| | - U N Dwivedi
- Department of Biochemistry, University of Lucknow, Lucknow 226007, Uttar Pradesh, India.
| | - P Kakkar
- Herbal Research Section, Food Drug & Chemical Toxicology Division, CSIR - Indian Institute of Toxicology Research, P.O. Box 80, M.G. Marg, Lucknow 226001, Uttar Pradesh, India.
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Bhangare RC, Tiwari M, Ajmal PY, Sahu SK, Pandit GG. Distribution of natural radioactivity in coal and combustion residues of thermal power plants. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-2942-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Soltani S, O’Brien T, Loganathan G, Bellin M, Anazawa T, Tiwari M, Papas K, Vickers S, Kumaravel V, Hering B, Sutherland D, Balamurugan A. Severely fibrotic pancreases from young patients with chronic pancreatitis: evidence for a ductal origin of islet neogenesis. Acta Diabetol 2013; 50:807-14. [PMID: 21773756 PMCID: PMC4124082 DOI: 10.1007/s00592-011-0306-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Accepted: 06/08/2011] [Indexed: 01/06/2023]
Abstract
While it is known that islet cell mass increases considerably after birth, general uncertainty surrounds the source of new beta cells in humans. Chronic pancreatitis (CP) presents a natural injury model for studying postnatal beta-cell regeneration in the human pancreas. In this report, we present histological evidence from human CP pancreases to support the theory that islet neogenesis can occur from ductal precursor cells after birth. Three young patients (ages 16, 12, and 28 years) underwent total pancreatectomy for the management of CP followed by islet isolation and autologous transplantation to prevent or minimize postsurgical diabetes. In all cases, the pancreases had extensive fibrosis, a rock-like consistency, and calcifications in the ducts. During islet isolations, we observed the unusual release of islets with many ductal fragments. In histopathological evaluation of these pancreases, solid cords of cells sometimes formed islet like structures intraductally or extending from ductal structures. Immunofluorescence staining for chromogranin, insulin, proinsulin, PDX1, glucagon, and cytokeratins confirmed these structures to be composed of chromogranin-positive endocrine cells which included both β-cells and α-cells. Labeling for Ki67 to demonstrate mitotic activity showed frequent labeling of duct epithelial cells and of some periductal cells. Using insulin and wide-spectrum cytokeratin double immunofluorescent labeling, we found insulin-positive cells to be present within the ductal lumens, among the cytokeratin-positive ductal epithelium, and extending from the ductal epithelium into surrounding connective tissues, providing evidence for a ductal origin of islet neogenesis.
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Affiliation(s)
- S.M. Soltani
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
| | - T.D. O’Brien
- Veterinary Population Medicine, University of Minnesota, Minneapolis, MN, USA
| | - G. Loganathan
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
| | - M.D. Bellin
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - T. Anazawa
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
| | - M. Tiwari
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
| | - K.K. Papas
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
| | - S.M. Vickers
- Department of Surgery, University of Minnesota, Minneapolis, MN, USA
| | - V. Kumaravel
- Alpha Hospital and Research Center, Institute of Diabetes and Endocrinology, Madurai-9, TamilNadu, India
| | - B.J. Hering
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
| | - D.E.R. Sutherland
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
- Department of Surgery, University of Minnesota, Minneapolis, MN, USA
| | - A.N. Balamurugan
- Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
- Corresponding author: A.N Balamurugan, PhD, Schulze Diabetes Institute, Department of Surgery, University of Minnesota, Minneapolis, MN, 55455, USA. Phone: 651-253-0656, Fax: 612-626-5855,
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Tiwari M, Sahu SK, Bhangare RC, Ajmal PY, Pandit GG. Depth profile of major and trace elements in estuarine core sediment using the EDXRF technique. Appl Radiat Isot 2013; 80:78-83. [PMID: 23845741 DOI: 10.1016/j.apradiso.2013.06.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 06/03/2013] [Accepted: 06/03/2013] [Indexed: 11/30/2022]
Abstract
Distribution and enrichment of elements in sediment are influenced by their texture, mineralogical composition, and physical transport. The vertical concentration profiles of sixteen elements in core sediment samples, namely Na, Mg, Al, K, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Br, Sr, and Pb were measured using the energy dispersive X-ray fluorescence (EDXRF) technique. To check the anthropogenic input various indices (enrichment factor, contamination factor, index of geoaccumulation and pollution load index) were calculated and compared.
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Affiliation(s)
- M Tiwari
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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Dierkes W, Tiwari M, Guo R, Datta R, Talma A, Noordermeer J, van Ooij W. OVERCOMING INCOMPATIBILITY PROBLEMS IN ELASTOMER BLENDS BY TAILORED SURFACE PROPERTIES OF RUBBER ADDITIVES. Rubber Chemistry and Technology 2013. [DOI: 10.5254/rct.13.89977] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
ABSTRACT
Rubber is a challenging composite material, whose functionality strongly depends on the affinity of the different materials in the composite and its morphology. One way to tailor polarity and chemistry of the filler surface is plasma coating. When using acetylene, thiophene, or pyrrole as monomers, the coating results in a reduced polarity of the filler compared with untreated silica, and unsaturated C–C bonds are formed on the surface. This improves the compatibility of the filler–polymer blends. In a SBR/EPDM blend, the filler–polymer compatibility is improved for all plasma-coated fillers compared with untreated silica. The best dispersion is achieved by plasma–pyrrole coating, as measured by the Payne effect and reinforcement parameter. The rubber–filler interaction is also highest for this blend, as measured by the bound rubber content. As expected, this results in improved tensile properties. In NBR/EPDM, the filler–filler interaction is significantly reduced by the plasma–pyrrole coating, which indicates a balanced compatibility of the pyrrole-treated silica in both polymers. The properties of the vulcanizate show the combinatorial effect of dispersion, filler–polymer interaction, polymer entanglements, and cross-link density. All plasma-treated, silica-filled NBR/EPDM materials show a considerable increase in tensile strength compared with untreated silica, with polyacetylene-treated silica resulting in the best properties. When plasma-coated curatives are used in SBR/EPDM blends, the scorch safety of the compounds is increased and the rupture energy is enhanced. In NBR/EPDM blends, all packages of the modified curatives provide an increased maximum torque compared with the control. Mechanical properties of the NBR/EPDM blend are improved even more than they are with SBR/EPDM. This indicates a more-balanced distribution of cross-links, along with a more-homogeneous carbon black dispersion over the different rubber phases. A better polarity match between additives and polymers usually results in improved material properties. The wide variety of monomers for the plasma polymerization allows researchers to tailor the surface properties of the additives.
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Affiliation(s)
- W. Dierkes
- University of Twente, Faculty of Engineering Technology, Department of Elastomer Technology & Engineering, P.O. Box 217, 7500 Ae Enschede, The Netherlands
- Tampere University of Technology, Department of Materials Science, P.O. Box 527, FI-33101 Tampere, Finland
| | - M. Tiwari
- University of Twente, Faculty of Engineering Technology, Department of Elastomer Technology & Engineering, P.O. Box 217, 7500 Ae Enschede, The Netherlands
| | - R. Guo
- University of Twente, Faculty of Engineering Technology, Department of Elastomer Technology & Engineering, P.O. Box 217, 7500 Ae Enschede, The Netherlands
| | - R. Datta
- University of Twente, Faculty of Engineering Technology, Department of Elastomer Technology & Engineering, P.O. Box 217, 7500 Ae Enschede, The Netherlands
| | - A. Talma
- University of Twente, Faculty of Engineering Technology, Department of Elastomer Technology & Engineering, P.O. Box 217, 7500 Ae Enschede, The Netherlands
| | - J. Noordermeer
- University of Twente, Faculty of Engineering Technology, Department of Elastomer Technology & Engineering, P.O. Box 217, 7500 Ae Enschede, The Netherlands
| | - W. van Ooij
- Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0012
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Pandit GG, Sahu SK, Tiwari M, Ajmal PY, Bhangare RC. Laser flourimetric analysis of uranium in water from Vishakhapatnam and estimation of health risk. Radiat Prot Environ 2013. [DOI: 10.4103/0972-0464.137478] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Tiwari M, Sahu S, Bhangare R, Ajmal P, Pandit G. Estimation of polycyclic aromatic hydrocarbons associated with size segregated combustion aerosols generated from household fuels. Microchem J 2013. [DOI: 10.1016/j.microc.2012.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kaur P, Mathur S, Sharma M, Tiwari M, Srivastava KK, Chandra R. A biologically active constituent of withania somnifera (ashwagandha) with antistress activity. Indian J Clin Biochem 2012; 16:195-8. [PMID: 23105317 DOI: 10.1007/bf02864860] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In Ayurvedic medicine,Withania somnifera (Ashwagandha) is well known for its anti-stress activity. A passive rat experimental model, where the animals are subjected to multiple stress of cold, hypoxia, restraint (C-H-R) has been developed to evaluate adaptogenic properties of various fractions of W. somnifera root extracts. We have carried out extraction of roots of W. somnifera with water and further isolated one of the active constituents called compound X and also tested its anti-stress activity in C-H-R model. The effect of administration of W. somnifera water suspension (360 mg/Kg bw) and compound X (20mg/Kg bw) on the fall and recovery of colonic temperature was noted. There was an increase of ≈38% and ≈54% in the time taken to attain T(rec) 23°C by rats given a single dose of fresh aqueous suspension and biologically active constituent (Compound X) respectively, where as decrease in the recovery time to attain T(rec) 37°C is ≈13% and ≈33% respectively, as compared to control group. It is clear that rats treated with the fresh aqueous suspension and compound X ofWithania somnifera, could withstand the multiple stress of C-H-R better than control group.
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Affiliation(s)
- P Kaur
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, 110007 Delhi
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McCabe K, Shobeiri N, Beseau D, Adams M, Holden R, Shobeiri N, Adams M, Holden R, Maio T, McCabe K, Laverty K, Beseau D, Pang J, Jozefacki A, Shobeiri N, Holden R, Adams M, Salem S, Jankowski V, Passlick-Deetjen J, Peter M, Zidek W, Jankowski J, Riser B, Barreto F, Valaitis P, Cook C, White J, Drueke T, Holmes C, Massy Z, Mizobuchi M, Ogata H, Kumata C, Nakazawa A, Koiwa F, Kinugasa E, Akizawa T, Lopez I, Aguilera-Tejero E, Guerrero F, Pineda C, Raya AI, Peralta A, Rodriguez M, Ciceri P, Volpi E, Brenna I, Brancaccio D, Cozzolino M, Bozic M, deRoij J, Parisi E, Ruiz-Ortega M, Fernandez E, Valdivielso JM, Lee CT, Ng HY, Tsai YC, Yang YK, Niwa T, Adijiang A, Shimizu H, Nishijima F, Okamoto T, Kamata K, Naito S, Aoyama T, Tazaki H, Yamanaka N, Koenigshausen E, Ohlsson S, Woznowski M, Quack I, Potthoff SA, Rump LC, Sellin L, Maquigussa E, Pereira L, Arnoni C, Boim M, Lee KW, Jeong JY, Jang WI, Chung S, Choi DE, Na KR, Shin YT, Slabiak-Blaz N, Adamczak M, Ritz E, Wiecek A, Uz E, Uz B, Sahin Balcik O, Kaya A, Akdeniz D, Bavbek Ruzgaresen N, Uz E, Turgut FH, Bayrak R, Carlioglu A, Akcay A, Galichon P, Vittoz N, Cornaire E, Baugey E, Vandermeersch S, Verpont MC, Mesnard L, Xu-Dubois YC, Hertig A, Rondeau E, Kokeny G, Fekeshazy O, Fang L, Rosivall L, Mozes MM, Duggan K, Hodge G, Ha H, Chen J, Lee L, Tay C, Macdonald G, Wang PHM, Tamouza H, Chemouny J, Monsinjon E, Tiwari M, Vende F, Vrtovsnik F, Camara NO, Benhamou M, Monteiro RC, Moura IC, Rigothier C, Saleem M, Ripoche J, Mathieson P, Combe C, Welsh G, Duwel A, Munoz-Felix JM, Lopez-Novoa JM, Martinez-Salgado C, Koutroutsos K, Kassimatis T, Nomikos A, Giannopoulou I, Papadakis J, Nakopoulou L, Nakamichi T, Mori T, Sato T, Sato H, Ito S, Neudecker S, Heilmann M, Kramer P, Wolf I, Sticht C, Schock-Kusch D, Gubhaju L, Kriz W, Bertram JF, Schad LR, Gretz N, Munoz-Felix JM, Fuentes-Calvo I, Lopez-Novoa JM, Martinez-Salgado C, Kimura T, Takabatake Y, Takahashi A, Kaimori JY, Matsui I, Namba T, Kitamura H, Niimura F, Matsusaka T, Soga T, Rakugi H, Isaka Y, Shin SJ, Kim KS, Kim WK, Rampanelli E, Teske G, Leemans J, Florquin S, Small D, Bennett N, Roy S, Gobe G, Blazquez-Medela AM, Garcia-Sanchez O, Lopez-Hernandez FJ, Lopez-Novoa JM, Martinez-Salgado C, Deibel A, Cheng J, Warner G, Knudsen B, Gray C, Lien K, Juskewitch J, Grande J, Wang N, Wang X, Zeng M, Sun B, Xing C, Zhao X, Xiong M, Yang J, Cao K, Priante G, Musacchio E, Sartori L, Valvason C, Baggio B, Pitlovanciv EDON, Reis LA, Pessoa EA, Teixeira L, Borges FT, Simoes MJ, Schor N, Munoz-Felix JM, Duwel A, Lopez-Novoa JM, Martinez-Salgado C, Doustar Y, Mohajeri D, Smirnov AV, Kucher AG, Ivanova GT, Berseneva ON, Parastaeva MM, Zarajsky MI, Saburova IJ, Kaukov IG, Koppe L, Fouque D, Dugenet Y, Soulage C, Wan J, Yang X, Cui J, Zou Z. Experimental pathology. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pfirsch-Maisonnas S, Aloulou M, Xu T, Claver J, Kanamaru Y, Tiwari M, Launay P, Monteiro RC, Blank U. Inhibitory ITAM Signaling Traps Activating Receptors with the Phosphatase SHP-1 to Form Polarized "Inhibisome" Clusters. Sci Signal 2011; 4:ra24. [DOI: 10.1126/scisignal.2001309] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Dierkes WK, Tiwari M, Datta RN, Talma AG, Noordermeer JWM, van Ooij WJ. PLASMA POLYMERIZATION OF MONOMERS ONTO FILLERS, TO TAILOR THEIR SURFACE PROPERTIES IN TIRE COMPOUNDS. Rubber Chemistry and Technology 2010. [DOI: 10.5254/1.3518518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Rubber reinforcement by fillers is primarily based on filler structure and surface properties. A chemical change of the surface properties while maintaining the structure allows tailoring filler properties for improved filler–polymer compatibility, resulting in improved morphological, dynamic, and mechanical properties of straight rubbers as well as elastomer blends. Plasma polymerization based on acetylene, pyrrole, and thiophene as monomers are applied to silica in order to change surface polarity and chemistry, with untreated and silane-treated silica as references. Generally spoken, the plasma coating results in reduced filler–filler interaction, improved dispersion, and increased bound rubber content in straight SBR as well as in SBR/EPDM blends. In terms of stress-strain properties, the plasma treatment results in higher moduli compared to the untreated filler. The most prominent effect was found in the stress-strain properties of straight SBR: Polythiophene-coated silica results in significantly higher moduli and tensile strength values, even higher than the silane-treated material. In the case of the polymer blend, the plasma treatment results in higher tensile strength and elongation at break values. It is important to note that no unambiguous correlation was found between filler–filler interaction and filler–polymer interaction: A lower Payne-effect does not necessarily result in a higher bound rubber content.
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Affiliation(s)
- W. K. Dierkes
- 1University of Twente, Department of Elastomer Technology and Engineering, 7500 AE Enschede, The Netherlands
| | - M. Tiwari
- 1University of Twente, Department of Elastomer Technology and Engineering, 7500 AE Enschede, The Netherlands
| | - R. N. Datta
- 1University of Twente, Department of Elastomer Technology and Engineering, 7500 AE Enschede, The Netherlands
| | - A. G. Talma
- 1University of Twente, Department of Elastomer Technology and Engineering, 7500 AE Enschede, The Netherlands
| | - J. W. M. Noordermeer
- 1University of Twente, Department of Elastomer Technology and Engineering, 7500 AE Enschede, The Netherlands
| | - W. J. van Ooij
- 2University of Cincinnati, Department of Chemical and Materials Engineering, Cincinnati, OH 45221-0012
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Tiwari M, Dwivedi UN, Kakkar P. Suppression of oxidative stress and pro-inflammatory mediators by Cymbopogon citratus D. Stapf extract in lipopolysaccharide stimulated murine alveolar macrophages. Food Chem Toxicol 2010; 48:2913-9. [PMID: 20655974 DOI: 10.1016/j.fct.2010.07.027] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 07/15/2010] [Accepted: 07/19/2010] [Indexed: 12/29/2022]
Abstract
Exploration of antioxidants of plant origin and their scientific validation for their immense pharmacological potential is emerging as an issue of intense research now-a-days.The effect of Cymbopogon citratus extract was seen on cell viability, oxidative stress markers i.e. ROS production, SOD activity, lipid peroxidation and GSH content of murine alveolar macrophages stressed with lipopolysaccharide. Modulation in release of NO and pro-inflammatory cytokine TNF-α along with alterations in mitochondrial membrane potential under stress were compared with known plant derived antioxidant quercetin. The extract was not found to be cytotoxic at any of the selected doses. At 5 and 10 μg the extract showed significant increase in SOD activity, GSH content (p<0.001), decrease in ROS production as seen by fluorescent dye DCFH-DA and also MDA formation (lipid peroxidation marker) significantly. The extract also showed reduction in the release of pro-inflammatory mediators TNF-α and NO significantly indicating an anti-inflammatory effect. The extract was able to restore mitochondrial membrane potential as estimated by spectrofluorimetry using the fluorescent dye Rhodamine 123. The results suggest potential use of the cytoprotective, antioxidant and anti-inflammatory property of C. citratus in the form of dietary component and also in formulations against lung inflammatory diseases where oxidative stress plays an important role.
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Affiliation(s)
- M Tiwari
- Herbal Research Section, Indian Institute of Toxicology Research, Mahatma Gandhi Marg, PO Box No 80, Lucknow 226 001, UP, India
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Balamurugan AN, Loganathan G, Bellin M, Wilhelm JJ, Harmon J, Anazawa T, Radosevich D, Yuasa T, Tiwari M, Papas KK, Mccarthy RC, Sutherland DE, Hering BJ. A NEW ENZYME MIXTURE TO CONSISTENTLY ACHIEVE HIGH HUMAN ISLET YIELD AND IMPROVED ALLOGENIC AND AUTOGRAFT ISLET TRANSPLANTATION OUTCOME. Transplantation 2010. [DOI: 10.1097/00007890-201007272-00595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shrestha R, Tiwari M, Ranabhat SK, Aryal G, Rauniyar SK, Shrestha HG. Incidental gallbladder carcinoma: value of routine histological examination of cholecystectomy specimens. Nepal Med Coll J 2010; 12:90-94. [PMID: 21222405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Cholecystectomized specimens are one of the frequently encountered specimens in daily routine histopathological work in the pathology department. With the expectation that most of the gallbladder specimens harbor benign disease, it is at times surprising to find occult malignancy. This study aims to find out the frequency of primary gallbladder carcinoma and incidental primary carcinoma, detected during routine histological examination of gallbladder specimen that were submitted in pathology department of Nepal Medical College Teaching Hospital (NMCTH) as well as to assess the need of histopathological examination of cholecystectomy specimens. Retrospective study was done in total 668 cases of cholecystectomies specimens submitted in NMCTH histopathology department during 5 yrs of duration from Jan 2003 to Dec 2007. There were total 22 cases of primary gallbladder carcinoma and 2 cases of metastatic cholangiocarcinoma in gallbladder. The incidence rate of primary malignancy was 3.3% and was commonly found in female at 7th decade of their life. Adenocarcinomas were the most common histological type with poor differentiation and diagnosed frequently at stage IIA. The rate of incidental primary carcinoma of gallbladder was 1.4%, detected commonly at stage I. Combined preoperative and intraoperatively, only 55.0% of histologically proven gallbladder malignancies were correctly identified. Intraoperative findings of incidental carcinomas included thickened GB (3 cases), distended GB (2 cases), GB polyp (1 case) and no obvious abnormality were mentioned in 3 cases. Therefore, every cholecystectomy specimen should be examined histopathologically to detect possible incidental carcinomas.
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Affiliation(s)
- R Shrestha
- Department of pathology, Chitwan Medical College and Teaching Hospital, Bharatpur, Nepal.
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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 Biol (Stuttg) 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- D Chakrabarty
- National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow, India
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Tiwari M, Datta RN, Talma AG, Noordermeer JWM, Dierkes WK, van Ooij WJ. Comparative Study of Plasma-Thiophene and -Acetylene Coated Silica in SBR and EPDM Reinforcement. Rubber Chemistry and Technology 2009. [DOI: 10.5254/1.3548259] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
The surface characteristics of silica were modified by plasma-thiophene and -acetylene film deposition. The plasma-coated fillers were blended with S-SBR and EPDM, and their influence on the final vulcanizate properties was compared with untreated silica and silanized silica. The change in the surface energy of plasma-acetylene (PA) and thiophene- (PTh) coated silica was characterized by immersion tests in liquids of various surface tension, water penetration measurements, Thermo Gravimetric Analysis (TGA) and Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS). All techniques gave evidence of a polymeric PA- and PTh-film deposition on the surface of silica. The properties of S-SBR and EPDM, filled with untreated, PA-, PTh- and silane-treated silica, were investigated by measurement of the Payne effect, bound rubber content and weight loss related to bound rubber, the reinforcement parameter, relative ranking of cross-link density and mechanical properties. The results show a lower degree of flocculation for PTh-silica filled EPDM due to a better match of the surface energies compared to untreated and PA-treated silica. EPDM filled with plasma-thiophene coated silica shows the lowest reinforcement parameter value, thus improved dispersion compared to untreated, silane-treated and plasma-acetylene silica. However, PA-silica filled EPDM shows better mechanical properties compared to untreated and plasma-thiophene coated silica. The PTh-silica filled S-SBR shows a higher bound rubber content, which results in better mechanical properties of the S-SBR compound compared to the one with PA-coated silica. The overall results show that the compatibility and interaction of silica with different rubbers can be controlled by tailoring the surface energy of the filler by plasma-polymerization. The different functionalities on the silica surface result in different levels of compatibility and interaction, as well as final vulcanizates properties.
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Affiliation(s)
- M. Tiwari
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, The Netherlands
| | - R. N. Datta
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, The Netherlands
| | - A. G. Talma
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, The Netherlands
| | - J. W. M. Noordermeer
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, The Netherlands
| | - W. K. Dierkes
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, The Netherlands
| | - W. J. van Ooij
- 2Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0012, USA;
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Tiwari M, Kakkar P. Plant derived antioxidants – Geraniol and camphene protect rat alveolar macrophages against t-BHP induced oxidative stress. Toxicol In Vitro 2009; 23:295-301. [DOI: 10.1016/j.tiv.2008.12.014] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 11/11/2008] [Accepted: 12/10/2008] [Indexed: 11/30/2022]
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Tiwari M, Noordermeer JWM, van Ooij WJ, Dierkes WK. Plasma polymerization of acetylene onto silica: an approach to control the distribution of silica in single elastomers and immiscible blends. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1187] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Santhosh S, Dash P, Parida M, Khan M, Tiwari M, Lakshmana Rao P. Comparative full genome analysis revealed E1: A226V shift in 2007 Indian Chikungunya virus isolates. Virus Res 2008; 135:36-41. [DOI: 10.1016/j.virusres.2008.02.004] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2008] [Revised: 02/13/2008] [Accepted: 02/14/2008] [Indexed: 10/22/2022]
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49
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Tiwari M, Noordermeer JWM, Dierkes WK, van Ooij WJ. Effect of Plasma Polymerization on the Performance of Silica in NBR, EPDM and NBR/EPDM Blends. Rubber Chemistry and Technology 2008. [DOI: 10.5254/1.3548210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
The surface modification of precipitated silica powders by plasma-polymerization with acetylene monomer in order to improve their performance in NBR, EPDM and NBR/EPDM rubber blends, by matching the surface energies of the silica fillers of the rubbers, is the subject of this study. Silica, used as reinforcing filler for elastomers, is coated with a polyacetylene (PA) film and characterized by water penetration measurements, Cetyltrimethyl Ammonium Bromide (CTAB) area, Thermo Gravimetric Analysis (TGA), Time of Flight-Secondary Ion Mass Spectroscopy (ToF-SIMS) and Scanning Electron Microscopy with elemental analysis by Energy Dispersive X-ray spectroscopy (SEM/EDX). All techniques show the evidence of a PA-film deposition on the surface of silica. The properties of NBR, EPDM and blends based on NBR and EPDM, filled with untreated, PA- and silane-treated silica, are investigated by measurement of the Payne effect, the bound rubber content and weight loss related to bound rubber, the reinforcement parameter and mechanical properties. The PA-silica filled samples show a lower Payne effect for EPDM and NBR/EPDM compared to the rubbers filled with unmodified silica. However, PA-silica filled NBR shows a higher Payne effect. This indicates an improved filler dispersion in the EPDM and NBR/EPDM, and a poorer dispersion in the NBR. The reduction of the reinforcement parameter as found for NBR, EPDM and NBR/EPDM indicates a lower degree of agglomeration in comparison with untreated and silane-treated silica. The PA-silica filled samples show the highest bound rubber contents and “in-rubber structure” for both rubbers as well as for the blend, compared to both other silica samples. The mechanical properties of untreated silica filled blend of NBR/EPDM are worse compared to the pure rubbers, but acetylene polymerization onto silica results in a significant improvement relative to the unmodified silica. The combined effects all point in the direction of improved compatibility of the PA-silica with the apolar EPDM. This results in better dispersion and stronger interaction with the EPDM, particularly in the blend with NBR, so as to significantly improve the mechanical properties of the blend relative to the use of untreated or silane-treated silica.
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Affiliation(s)
- M. Tiwari
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, the Netherlands;
| | - J. W. M. Noordermeer
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, the Netherlands;
| | - W. K. Dierkes
- 1Department of Elastomer Technology & Engineering, University of Twente, Enschede, the Netherlands;
| | - Wim J. van Ooij
- 2Department of Chemical and Materials Engineering, University of Cincinnati Cincinnati, OH 45221-0012, USA
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