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Sharma Y, Horwood C, Hakendorf P, Thompson C. Response to: Outcomes of admission for heart failure under general and cardiological medicine services. QJM 2023; 116:816-817. [PMID: 37267212 DOI: 10.1093/qjmed/hcad117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Indexed: 06/04/2023] Open
Affiliation(s)
- Y Sharma
- College of Medicine and Public Health, Flinders University, Adelaide, South Australia 5042, Australia
- Division of Medicine, Cardiac & Critical Care, Flinders Medical Centre, Adelaide, South Australia 5042, Australia
| | - C Horwood
- Department of Clinical Epidemiology, Flinders Medical Centre, Adelaide, South Australia 5042, Australia
| | - P Hakendorf
- Department of Clinical Epidemiology, Flinders Medical Centre, Adelaide, South Australia 5042, Australia
| | - C Thompson
- Discipline of Medicine, The University of Adelaide, Adelaide, South Australia 5005, Australia
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Jaber FL, Sharma Y, Gupta S. Hepatocyte Transplantation Rebalances Cytokines for Hepatic Regeneration in Rats with Ataxia Telangiectasia Mutated Pathway-Related Acute Liver Failure. Am J Pathol 2023; 193:27-38. [PMID: 36309105 PMCID: PMC9768683 DOI: 10.1016/j.ajpath.2022.10.003] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 09/08/2022] [Accepted: 10/04/2022] [Indexed: 11/11/2022]
Abstract
Inadequate DNA damage response related to ataxia telangiectasia mutated gene restricts hepatic regeneration in acute liver failure. Resolving mechanistic gaps in liver damage and repair requires additional animal models that are unconstrained by ultrarapid and unpredictable mortalities or substantial divergences from human pathology. This study used Fischer 344 rats primed with the antitubercular drug, rifampicin, plus phenobarbitone, and monocrotaline, a DNA adduct-forming alkaloid. Rifampicin and monocrotaline can cause liver failure in people. This regimen resulted in hepatic oxidative stress, necrosis, DNA double-strand breaks, liver test abnormalities, altered serum cytokine expression, and mortality. Healthy donor hepatocytes were transplanted ectopically in the peritoneal cavity to study whether they could supply metabolic support and rebalance inflammatory or protective cytokines affecting liver regeneration events. Hepatocyte transplantation increased candidate cytokine levels (granulocyte colony-stimulating factor, granulocyte-macrophage colony-stimulating factor, interferon-γ, IL-10, and IL-12), leading to Atm, Stat3, and Akt signaling in hepatocytes and nonparenchymal cells, lowering of inflammation, and improvements in intermediary metabolism, DNA repair, and hepatocyte proliferation. Such control of DNA damage and inflammation, along with stimulation of hepatic growth, offers paradigms for cell signaling to restore hepatic homeostasis and regeneration in acute liver failure. Further studies of molecular pathways of high pathobiological impact will advance the knowledge of liver regeneration.
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Affiliation(s)
- Fadi-Luc Jaber
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York
| | - Sanjeev Gupta
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York; Department of Pathology, Albert Einstein College of Medicine, Bronx, New York; Diabetes Center, Albert Einstein College of Medicine, Bronx, New York; Fleischer Institute for Diabetes and Metabolism, Albert Einstein College of Medicine, Bronx, New York; Irwin S. and Sylvia Chanin Institute for Cancer Research, Albert Einstein College of Medicine, Bronx, New York; Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York.
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Sharma Y, Horwood C, Hakendorf P, Thompson C. Characteristics and outcomes of patients with heart failure discharged from different speciality units in Australia: an observational study. QJM 2022; 115:727-734. [PMID: 35176164 DOI: 10.1093/qjmed/hcac051] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/02/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Previous studies have reported differing clinical outcomes among hospitalized heart failure (HF) patients admitted under cardiology and general medicine (GM) without consideration of patients' frailty. AIMS To explore outcomes in patients admitted under the two specialities after taking into account their frailty and other characteristics. METHODS This retrospective study included all HF patients ≥18 years admitted between 1 January 2013 and 31 December 2019 at two Australian tertiary hospitals. Frailty was determined by use of the Hospital Frailty Risk Score (HFRS) and patients with HFRS ≥ 5 were classified as frail. Propensity score matching (PSM) was used to match 11 variables between the two specialities. The primary outcomes included the days-alive-and-out-of-hospital (DAOH90) at 90 days of discharge, 30-day mortality and readmissions. RESULTS Of 4913 HF patients, mean age 76.2 (14.1) years, 51% males, 2653 (54%) were admitted under cardiology compared to 2260 (46%) under GM. Patients admitted under GM were more likely to be older females, with a higher Charlson index and poor renal function than those admitted under cardiology. Overall, 23.8% patients were frail and frail patients were more likely to be admitted under GM than cardiology (33.6% vs. 15.3%, P < 0.001). PSM created 1532 well-matched patients in each group. After PSM, the DAOH90 was not significantly different among patients admitted in GM when compared to cardiology (coefficient -5.36, 95% confidence interval -11.73 to 1.01, P = 0.099). Other clinical outcomes were also similar between the two specialities. CONCLUSIONS Clinical characteristics of HF patients differ between GM and cardiology; however, clinical outcomes were not significantly different after taking into account frailty and other variables.
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Affiliation(s)
- Y Sharma
- From the College of Medicine and Public Health, Flinders University, Sturt Road, Bedford Park, Adelaide, SA 5042, Australia
- Division of Medicine, Cardiac and Critical Care, Flinders Medical Centre, Flinders Drive, Bedford Park, SA 5042, Australia
| | - C Horwood
- Department of Clinical Epidemiology, Flinders Medical Centre, Adelaide, SA 5042, Australia
| | - P Hakendorf
- Department of Clinical Epidemiology, Flinders Medical Centre, Adelaide, SA 5042, Australia
| | - C Thompson
- Discipline of Medicine, The University of Adelaide, Adelaide, SA 5005, Australia
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4
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Thirunavukkarasu C, Sharma Y, Tchaikovskaya T, Maslov AY, Gupta S. Transcriptional profiling reveals ataxia telangiectasia mutated pathways regulate joint copper and arsenic toxicity for hepatic metalloplasia and anti-cancer therapies. Life Sci 2022; 305:120787. [PMID: 35809665 DOI: 10.1016/j.lfs.2022.120787] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/27/2022] [Accepted: 07/03/2022] [Indexed: 10/17/2022]
Abstract
AIMS Exposures to toxic metals, including arsenic (As), pose health risks but joint effects of physiologically needed metals, e.g., copper (Cu), are ill-defined for regulated metal-dependent cell proliferation (or metalloplasia). This study elucidated hepatic toxicities of As and Cu. MAIN METHODS Human HuH-7 cells were exposed to As and Cu and mRNA profiling obtained for molecular networks, regulators and signaling pathways. This followed biological testing of ATM signaling-related DNA damage response, mitochondrial dysfunction and lysosome activity using HuH-7 cells and primary hepatocytes. Free Cu ions were bound to 3-indole propionic acid for finding their contribution in toxicity. KEY FINDINGS The As or As plus Cu toxicities in HuH-7 cells produced dimorphic down- or up-regulation patterns in mRNA profiles. Significant differences extended for ontologies in protein synthesis, intermediary metabolism, mitochondrial function, autophagy, or cell survival and growth. Bioassays revealed ATM signaling regulated As and Cu toxicity for oxidative phosphorylation, mitochondrial membrane potential, lysosomal activity, DNA damage response, and cell growth-arrest. Removal of reactive Cu ions decreased As and Cu toxicity. Primary hepatocytes withstood Cu and As toxicity better. SIGNIFICANCE This joint As and Cu toxicity offers further mechanisms for metalloplasia, carcinogenesis and tissue damage in other settings, e.g., during excess Cu accumulation in Wilson disease. Moreover, joint As and Cu toxicities are relevant for anti-cancer therapies, potentially including manipulations to increase intracellular Cu through altered uptake or efflux processes and incorporating ATM-related checkpoint inhibitors. Superior tolerance of healthy hepatocytes to Cu and As toxicity should improve safety margins for anti-cancer therapies.
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Affiliation(s)
- Chinnasamy Thirunavukkarasu
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry 605 014, India
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Tatyana Tchaikovskaya
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Alexander Y Maslov
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Laboratory of Applied Genomic Technologies, Voronezh State University of Engineering Technology, Voronezh, Russia
| | - Sanjeev Gupta
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry 605 014, India; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Cancer Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Diabetes Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Fleischer Institute for Diabetes and Metabolism, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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Gal-Yam A, Bruch R, Schulze S, Yang Y, Perley DA, Irani I, Sollerman J, Kool EC, Soumagnac MT, Yaron O, Strotjohann NL, Zimmerman E, Barbarino C, Kulkarni SR, Kasliwal MM, De K, Yao Y, Fremling C, Yan L, Ofek EO, Fransson C, Filippenko AV, Zheng W, Brink TG, Copperwheat CM, Foley RJ, Brown J, Siebert M, Leloudas G, Cabrera-Lavers AL, Garcia-Alvarez D, Marante-Barreto A, Frederick S, Hung T, Wheeler JC, Vinkó J, Thomas BP, Graham MJ, Duev DA, Drake AJ, Dekany R, Bellm EC, Rusholme B, Shupe DL, Andreoni I, Sharma Y, Riddle R, van Roestel J, Knezevic N. A WC/WO star exploding within an expanding carbon-oxygen-neon nebula. Nature 2022; 601:201-204. [PMID: 35022591 DOI: 10.1038/s41586-021-04155-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 10/15/2021] [Indexed: 11/09/2022]
Abstract
The final fate of massive stars, and the nature of the compact remnants they leave behind (black holes and neutron stars), are open questions in astrophysics. Many massive stars are stripped of their outer hydrogen envelopes as they evolve. Such Wolf-Rayet stars1 emit strong and rapidly expanding winds with speeds greater than 1,000 kilometres per second. A fraction of this population is also helium-depleted, with spectra dominated by highly ionized emission lines of carbon and oxygen (types WC/WO). Evidence indicates that the most commonly observed supernova explosions that lack hydrogen and helium (types Ib/Ic) cannot result from massive WC/WO stars2,3, leading some to suggest that most such stars collapse directly into black holes without a visible supernova explosion4. Here we report observations of SN 2019hgp, beginning about a day after the explosion. Its short rise time and rapid decline place it among an emerging population of rapidly evolving transients5-8. Spectroscopy reveals a rich set of emission lines indicating that the explosion occurred within a nebula composed of carbon, oxygen and neon. Narrow absorption features show that this material is expanding at high velocities (greater than 1,500 kilometres per second), requiring a compact progenitor. Our observations are consistent with an explosion of a massive WC/WO star, and suggest that massive Wolf-Rayet stars may be the progenitors of some rapidly evolving transients.
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Affiliation(s)
- A Gal-Yam
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel.
| | - R Bruch
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
| | - S Schulze
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel.,The Oskar Klein Centre, Department of Astronomy and Department of Physics, AlbaNova, Stockholm University, Stockholm, Sweden
| | - Y Yang
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel.,Department of Astronomy, University of California, Berkeley, Berkeley, CA, USA
| | - D A Perley
- Astrophysics Research Institute, Liverpool John Moores University, Liverpool, UK
| | - I Irani
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
| | - J Sollerman
- The Oskar Klein Centre, Department of Astronomy and Department of Physics, AlbaNova, Stockholm University, Stockholm, Sweden
| | - E C Kool
- The Oskar Klein Centre, Department of Astronomy and Department of Physics, AlbaNova, Stockholm University, Stockholm, Sweden
| | - M T Soumagnac
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel.,Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - O Yaron
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
| | - N L Strotjohann
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
| | - E Zimmerman
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
| | - C Barbarino
- The Oskar Klein Centre, Department of Astronomy and Department of Physics, AlbaNova, Stockholm University, Stockholm, Sweden
| | - S R Kulkarni
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - M M Kasliwal
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - K De
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - Y Yao
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - C Fremling
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - L Yan
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - E O Ofek
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
| | - C Fransson
- The Oskar Klein Centre, Department of Astronomy and Department of Physics, AlbaNova, Stockholm University, Stockholm, Sweden
| | - A V Filippenko
- Department of Astronomy, University of California, Berkeley, Berkeley, CA, USA.,Miller Institute for Basic Research in Science, University of California, Berkeley, Berkeley, CA, USA
| | - W Zheng
- Department of Astronomy, University of California, Berkeley, Berkeley, CA, USA
| | - T G Brink
- Department of Astronomy, University of California, Berkeley, Berkeley, CA, USA
| | - C M Copperwheat
- Astrophysics Research Institute, Liverpool John Moores University, Liverpool, UK
| | - R J Foley
- Department of Astronomy and Astrophysics, University of California, Santa Cruz, Santa Cruz, CA, USA
| | - J Brown
- Department of Astronomy and Astrophysics, University of California, Santa Cruz, Santa Cruz, CA, USA
| | - M Siebert
- Department of Astronomy and Astrophysics, University of California, Santa Cruz, Santa Cruz, CA, USA
| | - G Leloudas
- DTU Space, National Space Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | | | | | | | - S Frederick
- Department of Astronomy, University of Maryland, College Park, MD, USA
| | - T Hung
- Department of Astronomy and Astrophysics, University of California, Santa Cruz, Santa Cruz, CA, USA
| | - J C Wheeler
- Department of Astronomy, University of Texas at Austin, Austin, TX, USA
| | - J Vinkó
- Department of Astronomy, University of Texas at Austin, Austin, TX, USA.,Konkoly Observatory, ELKH CSFK, Budapest, Hungary.,Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary.,ELTE Institute of Physics, Eötvös Loránd University, Budapest, Hungary
| | - B P Thomas
- Department of Astronomy, University of Texas at Austin, Austin, TX, USA
| | - M J Graham
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - D A Duev
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - A J Drake
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - R Dekany
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - E C Bellm
- DIRAC Institute, Department of Astronomy, University of Washington, Seattle, WA, USA
| | - B Rusholme
- IPAC, California Institute of Technology, Pasadena, CA, USA
| | - D L Shupe
- IPAC, California Institute of Technology, Pasadena, CA, USA
| | - I Andreoni
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - Y Sharma
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - R Riddle
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - J van Roestel
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA, USA
| | - N Knezevic
- Department of Astronomy, Faculty of Mathematics, University of Belgrade, Belgrade, Serbia
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Sharma Y, Horwood C, Hakendorf P, Thompson C. Benefits of Heart Failure Specific Pharmacotherapy in Frail Hospitalised Heart Failure Patients: An Observational Study. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.065] [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: 11/26/2022]
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Viswanathan P, Sharma Y, Jaber FL, Tchaikovskaya T, Gupta S. Transplanted hepatocytes rescue mice in acetaminophen-induced acute liver failure through paracrine signals for hepatic ATM and STAT3 pathways. FASEB J 2021; 35:e21471. [PMID: 33683737 DOI: 10.1096/fj.202002421r] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 01/27/2021] [Accepted: 02/08/2021] [Indexed: 12/29/2022]
Abstract
Acute liver failure constitutes a devastating condition that needs novel cell and molecular therapies. To elicit synergisms in cell types of therapeutic interest, we studied hepatocytes and liver sinusoidal endothelial in mice with acetaminophen-induced acute liver failure. The context of regenerative signals was examined by transplants in peritoneal cavity because it possesses considerable capacity and allows soluble signals to enter the systemic circulation. Whereas transplanted hepatocytes and liver sinusoidal endothelial cells engrafted in peritoneal cavity, only the former could rescue mice in liver failure by improving injury outcomes, activating hepatic DNA damage repair, and inducing liver regeneration. The cytokines secreted by donor hepatocytes or liver sinusoidal endothelial cells differed and in hepatocytes from mice undergoing acetaminophen toxicity major cytokines were even rendered deficient (eg, G-CSF, VEGF, and others). Significantly, recapitulating hepatotoxicity-related DNA damage response in cultured cells identified impairments in ATM and JAK/STAT3 intersections since replacing cytokines produced less from injured hepatocytes restored these pathways to avoid acetaminophen hepatotoxicity. Similarly, hepatocyte transplantation in acute liver failure restored ATM and JAK/STAT3 pathways to advance DNA damage/repair and liver regeneration. The unexpected identification of novel hepatic G-CSF receptor expression following injury allowed paradigmatic studies of G-CSF supplementation to confirm the centrality of this paracrine ATM and STAT3 intersection. Remarkably, DNA damage/repair and hepatic regeneration directed by G-CSF concerned rebalancing of regulatory gene networks overseeing inflammation, metabolism, and cell viability. We conclude that healthy donor hepatocytes offer templates for generating specialized cell types to replace metabolic functions and regenerative factors in liver failure.
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Affiliation(s)
- Preeti Viswanathan
- Division of Pediatric Gastroenterology, Department of Pediatrics, Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA.,Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Yogeshwar Sharma
- Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Fadi-Luc Jaber
- Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Tatyana Tchaikovskaya
- Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Sanjeev Gupta
- Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA.,Diabetes Center, Albert Einstein College of Medicine, Bronx, NY, USA.,Fleischer Institute for Diabetes and Metabolism, Albert Einstein College of Medicine, Bronx, NY, USA.,Irwin S. and Sylvia Chanin Institute for Cancer Research, Albert Einstein College of Medicine, Bronx, NY, USA.,Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, USA
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Viswanathan P, Gupta P, Sharma Y, Maisuradze L, Bandi S, Gupta S. Caffeine disrupts ataxia telangiectasia mutated gene-related pathways and exacerbates acetaminophen toxicity in human fetal immortalized hepatocytes. Toxicology 2021; 457:152811. [PMID: 33971260 DOI: 10.1016/j.tox.2021.152811] [Citation(s) in RCA: 4] [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] [Received: 03/15/2021] [Revised: 04/24/2021] [Accepted: 05/04/2021] [Indexed: 11/27/2022]
Abstract
Preterm infants are at greater risk for adverse drug effects due to hepatic immaturity. Multiple interventions during intensive care increases potential for drug interactions. In this setting, high-dose caffeine used for apnea in premature infants may increase acetaminophen toxicity by inhibiting ataxia telangiectasia mutated (ATM) gene activity during DNA damage response. To define caffeine and acetaminophen interaction, we modeled infantile prematurity in late-gestation fetal stage through human immortalized hepatocytes and liver organoids. The acute toxicity studies included assays for cell viability, mitochondrial dysfunction and ATM pathway-related DNA damage. Fetal cells expressed hepatobiliary properties, albeit with lower metabolic, synthetic and antioxidant functions than more mature hepatocytes. Acetaminophen in IC50 amount of 7.5 millimolar caused significant oxidative stress, mitochondrial membrane potential impairments, and DNA breaks requiring ATM-dependent repair. Caffeine markedly exacerbated acetaminophen toxicity by suppressing ATM activity in otherwise nontoxic 2.5 millimolar amount. Similarly, the specific ATM kinase antagonist, KU-60019, reproduced this deleterious interaction in 5 micromolar amount. Replicative stress from combined acetaminophen and caffeine toxicity depleted cells undergoing DNA synthesis in S phase and activated checkpoints for G0/G1 or G2/M restrictions. Synergistic caffeine and acetaminophen toxicity in liver organoids indicated these consequences should apply in vivo. The antioxidant, N-acetylcysteine, decreased oxidative damage, mitochondrial dysfunction and ATM pathway disruption to mitigate caffeine and acetaminophen toxicity. We concluded that hepatic DNA damage, mitochondrial impairment and growth-arrest after combined caffeine and acetaminophen toxicity will be harmful for premature infants. Whether caffeine and acetaminophen toxicity may alter outcomes in subsequently encountered hepatic disease needs consideration.
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Affiliation(s)
- Preeti Viswanathan
- Division of Pediatric Gastroenterology and Department of Pediatrics, Children's Hospital at Montefiore, USA
| | | | | | | | - Sriram Bandi
- Department of Medicine, USA; Marion Bessin Liver Research Center, USA
| | - Sanjeev Gupta
- Department of Medicine, USA; Marion Bessin Liver Research Center, USA; Department of Pathology, USA; Diabetes Center, USA; Fleischer Institute for Diabetes and Metabolism, USA; Irwin S. and Sylvia Chanin Institute for Cancer Research, USA; Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York, USA.
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Jaber FL, Sharma Y, Mui BG, Kapoor S, Gupta S. Tumor Necrosis Factor Directs Allograft-Related Innate Responses and Its Neutralization Improves Hepatocyte Engraftment in Rats. Am J Pathol 2021; 191:79-89. [PMID: 33127336 PMCID: PMC7768347 DOI: 10.1016/j.ajpath.2020.09.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 09/09/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022]
Abstract
The innate immune system plays a critical role in allograft rejection. Alloresponses involve numerous cytokines, chemokines, and receptors that cause tissue injury during rejection. To dissect these inflammatory mechanisms, we developed cell transplantation models in dipeptidylpeptidase-deficient F344 rats using mycophenolate mofetil and tacrolimus for partial lymphocyte-directed immunosuppression. Syngeneic hepatocytes engrafted in liver, whereas allogeneic hepatocytes were rejected but engrafted after immunosuppression. These transplants induced mRNAs for >40 to 50 cytokines, chemokines, and receptors. In allografts, innate cell type-related regulatory networks extended to granulocytes, monocytes, and macrophages. Activation of Tnfa and its receptors or major chemokine receptor-ligand subsets persisted in the long term. An examination of the contribution of Tnfa in allograft response revealed that it was prospectively antagonized by etanercept or thalidomide, which resolved cytokine, chemokine, and receptor cascades. In bioinformatics analysis of upstream regulator networks, the Cxcl8 pathway exhibited dominance despite immunosuppression. Significantly, Tnfa antagonism silenced the Cxcl8 pathway and decreased neutrophil and Kupffer cell recruitment, resulting in multifold greater engraftment of allogeneic hepatocytes and substantially increased liver repopulation in retrorsine/partial hepatectomy model. We conclude that Tnfa is a major driver for persistent innate immune responses after allogeneic cells. Neutralizing Tnfa should help in avoiding rejection and associated tissue injury in the allograft setting.
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Affiliation(s)
- Fadi Luc Jaber
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York
| | - Brandon G Mui
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Sorabh Kapoor
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York
| | - Sanjeev Gupta
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York; Department of Pathology, Albert Einstein College of Medicine, Bronx, New York; Diabetes Center, Albert Einstein College of Medicine, Bronx, New York; Fleischer Institute for Diabetes and Metabolism, Albert Einstein College of Medicine, Bronx, New York; Irwin S. and Sylvia Chanin Institute for Cancer Research, Albert Einstein College of Medicine, Bronx, New York; Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York.
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Han CY, Sharma Y, Yaxley A, Baldwin C, Miller M. Use of the Patient-Generated Subjective Global Assessment to Identify Pre-Frailty and Frailty in Hospitalized Older Adults. J Nutr Health Aging 2021; 25:1229-1234. [PMID: 34866150 DOI: 10.1007/s12603-021-1704-5] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVES The Scored Patient-Generated Subjective Global Assessment (PG-SGA) and Edmonton Frail Scale (EFS) are widely used in acute care settings to assess nutritional and frailty status, respectively. We aimed to determine whether the scored PG-SGA can identify pre-frailty and frailty status, to simultaneously evaluate malnutrition and frailty in clinical practice. DESIGN Cross-sectional study. SETTINGS AND PARTICIPANTS A convenience sample of 329 consecutive patients admitted to an acute medical unit in South Australia. MEASUREMENTS Nutritional and frailty status were ascertained with scored PG-SGA and EFS, respectively. Optimal cut-off scores to identify pre-frailty and frailty were determined by calculating the Scored PG-SGA's sensitivity, specificity, positive and negative predictive values, Youden Index (YI), Liu index, Receiver Operator Curves (ROC) and Area Under Curve (AUC). Nutritional status and patient characteristics were analysed according to frailty categories. RESULTS The optimal cut-off PG-SGA score as determined by the highest YI, to identify both pre-frailty and frailty was >3, with a sensitivity of 0.711 and specificity of 0.746. The AUC was 0.782 (95% CI 0.731-0.833). In this cohort, 64% of the patients were well-nourished, 26% were moderately malnourished and 10% were severely malnourished. Forty-three percent, 24% and 33% of the patients were classified as robust, pre-frail and frail, respectively. Bivariate analysis showed that those robust were significantly younger than those who were pre-frail (-2.8, 95% CI -5.5 to -0.1, p=0.036) or frail (-3.4, 95% CI -5.9 to -1.0, p=0.002). Robust patients had significantly lower Scored PG-SGA than those who were pre-frail (-2.5, 95%CI -3.8 to -1.1, p<0.001) or frail (-4.9, 95% CI -6.1 to -3.7, p<0.001). CONCLUSION The Scored PG-SGA is moderately sensitive in identifying pre-frailty/frailty in older hospitalized adults and can be useful in identifying both conditions concurrently.
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Affiliation(s)
- C Y Han
- Chad Yixian Han, Caring Futures Institute, College of Nursing and Health Sciences, Flinders University, Sturt Road, Bedford Park, SA5042, Australia, E-mail address:
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Pyngrope A, Khardewsaw A, Sharma Y, Maibam D, Saxena A, Sahoo BK. STUDY OF INDOOR RADON, THORON AND THEIR PROGENY IN SOUTH WEST KHASI HILLS DISTRICT OF MEGHALAYA, INDIA. Radiat Prot Dosimetry 2020; 189:347-353. [PMID: 32342102 DOI: 10.1093/rpd/ncaa048] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 03/07/2020] [Accepted: 03/10/2020] [Indexed: 06/11/2023]
Abstract
A survey of indoor radon/thoron and their progeny concentrations was carried out in dwellings in the South West Khasi Hills district of Meghalaya, India. The survey was carried out using solid-state nuclear track detectors based on single-entry pinhole dosimeter and direct radon/thoron progeny sensors. The results are subjected to statistical analysis and discussed in the manuscript. The mean value of annual effective dose of the study region is estimated at 1.8 mSv.y -1. Seasonal variability and role of different indoor parameters are also discussed.
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Affiliation(s)
- A Pyngrope
- Department of Physics, North-Eastern Hill University, Shillong 793022, India
| | - A Khardewsaw
- Department of Physics, North-Eastern Hill University, Shillong 793022, India
| | - Y Sharma
- Department of Physics, Don Bosco College, Tura 794001, India
| | - D Maibam
- Don Bosco College of Teacher Education, Tura 794001, India
| | - A Saxena
- Department of Physics, North-Eastern Hill University, Shillong 793022, India
| | - B K Sahoo
- Radiological Physics and Advisory Division, BARC, Mumbai 400085, India
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Bhargava D, Neelakandan R, Sharma Y, Dalsingh V, Beena S, Gurjar P. Predictability and Feasibility of Total Alloplastic Temporomandibular Joint Reconstruction using DARSN TM Joint Prosthesis for patients in Indian subcontinent–A prospective clinical study. Journal of Stomatology, Oral and Maxillofacial Surgery 2020; 121:2-8. [DOI: 10.1016/j.jormas.2019.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/05/2019] [Accepted: 06/18/2019] [Indexed: 10/26/2022]
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Viswanathan P, Sharma Y, Maisuradze L, Tchaikovskaya T, Gupta S. Ataxia telangiectasia mutated pathway disruption affects hepatic DNA and tissue damage in nonalcoholic fatty liver disease. Exp Mol Pathol 2020; 113:104369. [PMID: 31917286 DOI: 10.1016/j.yexmp.2020.104369] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 01/22/2019] [Revised: 11/27/2019] [Accepted: 01/03/2020] [Indexed: 12/26/2022]
Abstract
To overcome the rising burdens of nonalcoholic fatty liver disease, mechanistic linkages in mitochondrial dysfunction, inflammation and hepatic injury are critical. As ataxia telangiectasia mutated (ATM) gene oversees DNA integrity and mitochondrial homeostasis, we analyzed mRNAs and total proteins or phosphoproteins related to ATM gene by arrays in subjects with healthy liver, fatty liver or nonalcoholic steatohepatitis. Functional genomics approaches were used to query DNA damage or cell growth events. The effects of fatty acid-induced toxicity in mitochondrial health, DNA integrity and cell proliferation were validated in HuH-7 cells, including by inhibiting ATM kinase activity or knckdown of its mRNA. In fatty livers, DNA damage and ATM pathway activation was observed. During induced steatosis in HuH-7 cells, lowering of ATM activity produced mitochondrial dysregulation, DNA damage and cell growth inhibition. In livers undergoing steatohepatitis, ATM was depleted with increased hepatic DNA damage and growth-arrest due to cell cycle checkpoint activations. Moreover, molecular signatures of oncogenesis were associated with upstream mechanistic networks directing cell metabolism, inflammation or growth that were either activated (in fatty liver) or inactivated (in steatohepatitis). To compensate for hepatic growth arrest, preoncogenic oval cell populations expressing connexin-43 and/or albumin emerged. These oval cells avoided DNA damage and proliferated actively. We concluded that ATM is a major contributor to the onset and progression of nonalcoholic fatty liver disease. Therefore, specific markers for ATM pathway dysregulation will allow prospective segregation of cohorts for disease susceptibility and progression from steatosis to steatohepatitis. This will offer superior design and evaluation parameters for clinical trials. Restoration of ATM activity with targeted therapies should be appropriate for nonalcoholic fatty liver disease.
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Affiliation(s)
- Preeti Viswanathan
- Department of Pediatrics, Albert Einstein College of Medicine and Children's Hospital at Montefiore, Bronx, NY, United States
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Luka Maisuradze
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Tatyana Tchaikovskaya
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, United States; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Sanjeev Gupta
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, United States; Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, United States; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, United States; Diabetes Center, Albert Einstein College of Medicine, Bronx, NY, United States; Irwin S. and Sylvia Chanin Institute for Cancer Research, and Albert Einstein College of Medicine, Bronx, NY, United States; Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, United States.
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Gupta P, Sharma Y, Viswanathan P, Gupta S. Cellular cytokine receptor signaling and ATM pathway intersections affect hepatic DNA repair. Cytokine 2019; 127:154946. [PMID: 31837586 DOI: 10.1016/j.cyto.2019.154946] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/30/2019] [Accepted: 11/26/2019] [Indexed: 01/07/2023]
Abstract
Pathways involving ataxia telangiectasia mutated (ATM) gene and its downstream partners and effectors are critical for the DNA damage response. Cell survival, proliferation and tissue homeostasis are dependent upon preservation of DNA integrity but additional intracellular mechanisms contribute in these processes. As receptor-mediated signaling with beneficial intersections in ATM pathways could have therapeutic significance, we interrogated such intersections with assays using HuH-7 cells (hepatocytes). These cells were subjected to acetaminophen toxicity, which is a leading cause of hepatic injury and acute liver failure in people. The ATM pathway was examined in HuH-7-ATM-Prom-tdT cells containing fluorescent td-Tomato transgene reporter for ATM promoter activity. Titrated doses of specific growth factors were used as ligands for receptor-mediated signaling. The contribution of JAK/STAT3 signaling was defined by the loss-of-function approach with the JAK antagonist, ruxolitinib. In these assays, impairment in ATM-related DNA damage response following acetaminophen toxicity was ameliorated by selected growth factors, including fibroblast growth factors, granulocyte colony stimulating factor and vascular endothelial growth factor. The JAK/STAT3 signaling was exclusive to granulocyte colony stimulating factor but concerned additional pathways in cases of other growth factors. Antagonism of JAK/STAT3 by ruxolitinib abrogated benefits in ATM pathway-mediated DNA repair; and identification of the ruxolitinib-sensitive component of cytoprotection allowed separations of these pathway intersections. Therefore, this subtractive approach for ATM and other regulators in pathways will be informative for DNA damage response. These mechanisms will benefit therapeutic development for ATM-related tissue and organ injuries.
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Affiliation(s)
- Priya Gupta
- Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA
| | - Preeti Viswanathan
- Division of Pediatric Gastroenterology, Children's Hospital at Montefiore Medical Center, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA
| | - Sanjeev Gupta
- Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA; Department of Pathology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA; Marion Bessin Liver Research Center, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA; Diabetes Center, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA; Irwin S. and Sylvia Chanin Institute for Cancer Research, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA; Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA.
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Khatoon N, Sharma Y, Sardar M, Manzoor N. Mode of action and anti-Candida activity of Artemisia annua mediated-synthesized silver nanoparticles. J Mycol Med 2019; 29:201-209. [DOI: 10.1016/j.mycmed.2019.07.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 10/26/2022]
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Babu BV, Sharma Y, Kusuma YS, Sivakami M, Lal DK, Marimuthu P, Geddam JB, Khanna A, Agarwal M, Sudhakar G, Sengupta P, Borhade A, Khan Z, Kerketta AS, Brogen A. Patient experiences and health system responsiveness among internal migrants: A nationwide study in 13 Indian cities. J Healthc Qual Res 2019; 34:167-175. [PMID: 31713527 DOI: 10.1016/j.jhqr.2019.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 04/02/2019] [Accepted: 04/26/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To report various components of health system responsiveness among poor internal migrants who availed the government health facilities in 13 Indian cities. MATERIALS AND METHODS Cluster random sampling was used to select 50,806 migrant households, of which 14,263 households avail the government health facility in last six months. In addition, 5072 women, who sought antenatal care and 3946 women who had delivery in government health facility during last six months were also included. Data on different domains of health system responsiveness were collected using an interviewer-administered questionnaire, developed based on the World Health Survey of WHO. RESULTS Of the eight domains of responsiveness, namely, autonomy, communication, confidentiality, dignity, choice, quality of basic facilities, prompt attention and access to family and community, seven domains, except the 'choice', are assessed, and they are moderate. Only about 30% of participants said that doctor discussed on treatment options (autonomy). And 50-60% of participants said positively for questions of clarity of communication. About 59% of participants acknowledged the confidentiality. Not more than 40% of participants said they were treated with dignity, and privacy is respected (dignity). The responses to quality basic amenities, prompt attention and access to family and community domains are fairly satisfactory. CONCLUSIONS This study has implications as many urban poor, including migrants do not utilize the services of public healthcare facilities. Hence, a responsive health system is required. There should be a policy in place to train and orient healthcare workers on some of the domains of health system responsiveness.
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Affiliation(s)
- B V Babu
- Division of Socio-Behavioural & Health Systems Research, Indian Council of Medical Research, New Delhi, India.
| | - Y Sharma
- Division of Socio-Behavioural & Health Systems Research, Indian Council of Medical Research, New Delhi, India
| | - Y S Kusuma
- Centre for Community Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - M Sivakami
- Centre for Health and Social Sciences, School of Health Systems Studies, Tata Institute of Social Sciences, Mumbai, India
| | - D K Lal
- International Institute of Health Management Research, New Delhi, India
| | - P Marimuthu
- Department of Biostatistics, National Institute of Mental Health and Neuro-Sciences, Bangalore, India
| | - J B Geddam
- National Institute of Nutrition of Indian Council of Medical Research, Hyderabad, India
| | - A Khanna
- Indian Institute of Health Management Research, Jaipur, India
| | - M Agarwal
- Department of Community Medicine & Public Health, KG Medical University, Lucknow, India
| | - G Sudhakar
- Department of Human Genetics, Andhra University, Visakhapatnam, India
| | - P Sengupta
- Department of Community Medicine, Christian Medical College, Ludhiana, India
| | - A Borhade
- Indian Institute of Public Health, Public Health Foundation of India, Gurgaon, India
| | - Z Khan
- Department of Community Medicine, JN Medical College, Aligarh Muslim University, Aligarh, India
| | - A S Kerketta
- Regional Medical Research Centre, Indian Council of Medical Research, Bhubaneswar, India
| | - A Brogen
- Department of Community Medicine, Regional Institute of Medical Sciences, Imphal, India
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Bhargava D, Neelakandan RS, Dalsingh V, Sharma Y, Pandey A, Pandey A, Beena S, Koneru G. A three dimensional (3D) musculoskeletal finite element analysis of DARSN temporomandibular joint (TMJ) prosthesis for total unilateral alloplastic joint replacement. J Stomatol Oral Maxillofac Surg 2019; 120:517-522. [PMID: 30965154 DOI: 10.1016/j.jormas.2019.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 04/02/2019] [Indexed: 10/27/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the strain and stress distribution for DARSN alloplastic unilateral temporomandibular joint (TMJ) prosthesis and the effects on contralateral natural joint using a finite element analysis (FEA). METHODS The replacement of the TMJ may have complications like infection, failure of hardware, facial paralysis and perforation. The understanding of the mechanical forces exerted by muscles of mastication and jaw movement on the joint helps in identifying the regions on alloplastic TMJ with various maximum forces, which makes that area more prone for failure of hardware. A three dimensional structural FEA was applied using a validated finite element model (FEM) where the areas of stress and strain were evaluated in the alloplastic joint and the contralateral natural joint. As the pattern of stress and strain can be influenced by the materials used for alloplastic joint and geometry of the design, mechanical property of bone and the attached musculature were also considered while construction the FEM analysis. RESULTS The forces of the muscles of mastication has a vital role on the amount of stress and strain present across the alloplastic joint. Masseter and temporalis exhibited the greatest resultant force on the alloplastic as well as the natural condyle with a magnitude of 272 N and 329 N. This study assessed the maximum stress and strain on the condyle-ramus unit and fossa. CONCLUSION FEA shows that alloplastic DARSN TMJ prosthesis distributes stress and strain equally between the alloplastic joint site and the contralateral natural joint causing minimal adverse effects to the natural joint. FEA also evaluated the stress and strain on alloplastic component and resulted in drawing clinical implications for operating surgical team.
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Affiliation(s)
- D Bhargava
- Department of Oral and Maxillofacial Surgery, People's College of Dental Sciences and Research Center, People's University, Bhanpur, Bhopal, 462037 Madhya Pradesh, India.
| | - R S Neelakandan
- Department of Oral and Maxillofacial Surgery, Meenakshi Ammal Dental College and Hospital, Chennai, 600095 Tamil Nadu, India
| | - V Dalsingh
- Department of Oral and Maxillofacial Surgery, Lenora Institute of Dental Sciences, Rajahmundry, 533294 Andhra Pradesh, India
| | - Y Sharma
- Department of Oral and Maxillofacial Surgery, People's Dental Academy, People's University, Bhanpur, Bhopal, 462037 Madhya Pradesh, India
| | - A Pandey
- TMJ Consultancy, Bhopal, 462001 Madhya Pradesh, India
| | - A Pandey
- Department of Oral and Maxillofacial Surgery, RKDF Dental College and Research Centre, Bhopal, 462026 Madhya Pradesh, India
| | - S Beena
- Department of Oral and Maxillofacial Surgery, People's College of Dental Sciences and Research Center, People's University, Bhanpur, Bhopal, 462037 Madhya Pradesh, India
| | - G Koneru
- Department of Oral and Maxillofacial Surgery, Sibar Institute of Dental Sciences and Research Center, Vijayawada, 522509 Andhra Pradesh, India
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Bhargava D, Neelakandan RS, Sharma Y, Beena S, Gurjar P. Partial thickness temporalis rotation for alloplastic temporomandibular joint - how I do it. J Stomatol Oral Maxillofac Surg 2019; 120:355-357. [PMID: 30641280 DOI: 10.1016/j.jormas.2019.01.001] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 01/03/2019] [Indexed: 11/19/2022]
Abstract
With increasing clinical evidence, the replacement of the temporomandibular joint with alloplastic joints is being increasingly accepted in severe degenerative diseases. There remains a risk of infection and a possibility of a failure of not just these prostheses but any alloplastic joint prosthesis post-operatively. Therefore, an extra precaution and additional coverage to the joint using partial thickness myo-temporalis rotation flap could be a useful option to minimize post-operative joint failure.
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Affiliation(s)
- D Bhargava
- Department of Oral and Maxillofacial Surgery, People's College of Dental Sciences and Research Centre, People's University, 462037, Bhanpur, Bhopal, Madhya Pradesh, India.
| | - R S Neelakandan
- Meenakshi Academy of Higher Education and Research Centre, Chennai, Tamil Nadu, India
| | - Y Sharma
- Department of Oral and Maxillofacial Surgery, People's College of Dental Sciences and Research Centre, People's University, 462037, Bhanpur, Bhopal, Madhya Pradesh, India; Department of Oral and Maxillofacial Surgery, People's Dental Academy, People's University, 462037, Bhanpur, Bhopal, Madhya Pradesh, India
| | - S Beena
- Department of Oral and Maxillofacial Surgery, People's College of Dental Sciences and Research Centre, People's University, 462037, Bhanpur, Bhopal, Madhya Pradesh, India
| | - P Gurjar
- Department of Oral and Maxillofacial Surgery, People's College of Dental Sciences and Research Centre, People's University, 462037, Bhanpur, Bhopal, Madhya Pradesh, India
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Peterson EA, Polgar Z, Devakanmalai GS, Li Y, Jaber FL, Zhang W, Wang X, Iqbal NJ, Murray JW, Roy-Chowdhury N, Quispe-Tintaya W, Maslov AY, Tchaikovskaya TL, Sharma Y, Rogler LE, Gupta S, Zhu L, Roy-Chowdhury J, Shafritz DA. Genes and Pathways Promoting Long-Term Liver Repopulation by Ex Vivo hYAP-ERT2 Transduced Hepatocytes and Treatment of Jaundice in Gunn Rats. Hepatol Commun 2019; 3:129-146. [PMID: 30620000 PMCID: PMC6312667 DOI: 10.1002/hep4.1278] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 10/15/2018] [Indexed: 11/18/2022] Open
Abstract
Hepatocyte transplantation is an attractive alternative to liver transplantation. Thus far, however, extensive liver repopulation by adult hepatocytes has required ongoing genetic, physical, or chemical injury to host liver. We hypothesized that providing a regulated proliferative and/or survival advantage to transplanted hepatocytes should enable repopulation in a normal liver microenvironment. Here, we repopulated livers of DPPIV− (dipeptidyl peptidase‐4) rats and Ugt1a1 (uridinediphosphoglucuronate glucuronosyltransferase 1a1)‐deficient Gunn rats (model of Crigler‐Najjar syndrome type 1), both models without underlying liver injury, for up to 1 year by transplanting lenti‐hYAP‐ERT2 (mutated estrogen receptor ligand‐binding domain 2)‐transduced hepatocytes (YAP‐Hc). Yap (yes‐associated protein) nuclear translocation/function in YAP‐Hc was regulated by tamoxifen. Repopulating YAP‐Hc and host hepatocytes were fluorescence‐activated cell sorting–purified and their transcriptomic profiles compared by RNAseq. After 1 year of liver repopulation, YAP‐Hc clusters exhibited normal morphology, integration into hepatic plates and hepatocyte‐specific gene expression, without dysplasia, dedifferentiation, or tumorigenesis. RNAseq analysis showed up‐regulation of 145 genes promoting cell proliferation and 305 genes suppressing apoptosis, including hepatocyte growth factor and connective tissue growth factor among the top 30 in each category and provided insight into the mechanism of cell competition that enabled replacement of host hepatocytes by YAP‐Hc. In Gunn rats transplanted with YAP‐Hc+tamoxifen, there was a 65%‐81% decline in serum bilirubin over 6 months versus 8%‐20% with control‐Hc, representing a 3‐4‐fold increase in therapeutic response. This correlated with liver repopulation as demonstrated by the presence of Ugt1a1‐positive hepatocyte clusters in livers and western blot analysis of tissue homogenates. Conclusion: Tamoxifen‐regulated nuclear translocation/function of hYAP‐ERT2 enabled long‐term repopulation of DPPIV−/− and Gunn rat livers by hYAP‐ERT2‐transduced hepatocytes without tumorigenesis. This cell transplantation strategy may offer a potential therapy for most of the inherited monogenic liver diseases that do not exhibit liver injury.
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Affiliation(s)
- Esther A Peterson
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Zsuzsanna Polgar
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | | | - Yanfeng Li
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Fadi L Jaber
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Wei Zhang
- Department of Radiation Oncology Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Xia Wang
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Niloy J Iqbal
- Department of Developmental and Molecular Biology Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - John W Murray
- Department of Anatomy and Structural Biology Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Namita Roy-Chowdhury
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY.,Department of Genetics Albert Einstein College of Medicine Bronx NY
| | | | | | - Tatyana L Tchaikovskaya
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Yogeshwar Sharma
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Leslie E Rogler
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Sanjeev Gupta
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY.,Department of Pathology Albert Einstein College of Medicine Bronx NY
| | - Liang Zhu
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY.,Department of Developmental and Molecular Biology Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY
| | - Jayanta Roy-Chowdhury
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY.,Department of Genetics Albert Einstein College of Medicine Bronx NY
| | - David A Shafritz
- Department of Medicine Marion Bessin Liver Research Center, Albert Einstein College of Medicine Bronx NY.,Department of Pathology Albert Einstein College of Medicine Bronx NY.,Department of Cell Biology Albert Einstein College of Medicine Bronx NY
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Yadav N, Jaber FL, Sharma Y, Gupta P, Viswanathan P, Gupta S. Efficient Reconstitution of Hepatic Microvasculature by Endothelin Receptor Antagonism in Liver Sinusoidal Endothelial Cells. Hum Gene Ther 2018; 30:365-377. [PMID: 30266073 DOI: 10.1089/hum.2018.166] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 12/25/2022] Open
Abstract
Reconstitution of healthy endothelial cells in vascular beds offers opportunities for mechanisms in tissue homeostasis, organ regeneration, and correction of deficient functions. Liver sinusoidal endothelial cells express unique functions, and their transplantation is relevant for disease models and for cell therapy. As molecular targets for improving transplanted cell engraftment and proliferation will be highly significant, this study determined whether ETA/B receptor antagonism by the drug bosentan could overcome cell losses due to cell transplantation-induced cytotoxicity. Cell engraftment and proliferation assays were performed with healthy wild-type liver sinusoidal endothelial cells transplanted into the liver of dipeptidylpeptidase IV knockout mice. Transplanted cells were identified in tissues by enzyme histochemistry. Cells with prospective ETA/B antagonism engrafted significantly better in hepatic sinusoids. Moreover, these cells underwent multiple rounds of division under liver repopulation conditions. The gains of ETA/B antagonism resulted from benefits in cell viability and membrane integrity. Also, in bosentan-treated cells, mitochondrial homeostasis was better maintained with less oxidative stress and DNA damage after injuries. Intracellular effects of ETA/B antagonism were transduced by conservation of ataxia telangiectasia mutated protein, which directs DNA damage response. Therefore, ETA/B antagonism in donor cells will advance vascular reconstitution. Extensive experience with ETA/B antagonists will facilitate translation in people.
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Affiliation(s)
- Neelam Yadav
- 1 Department of Medicine, Albert Einstein College of Medicine, Bronx, New York.,2 Department of Biochemistry, Dr. RML Avadh University, Faizabad, India
| | - Fadi Luc Jaber
- 1 Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Yogeshwar Sharma
- 1 Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Priya Gupta
- 1 Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Preeti Viswanathan
- 3 Department of Pediatrics, Albert Einstein College of Medicine and Children's Hospital at Montefiore, Bronx, New York
| | - Sanjeev Gupta
- 1 Department of Medicine, Albert Einstein College of Medicine, Bronx, New York.,4 Department of Pathology, Albert Einstein College of Medicine, Bronx, New York.,5 Marion Bessin Liver Research Center, Diabetes Center, Irwin S. and Sylvia Chanin Institute for Cancer Research, and Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York
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Sharma Y, Liu J, Kristian KE, Follenzi A, Gupta S. In Atp7b-/- Mice Modeling Wilson's Disease Liver Repopulation With Bone Marrow-Derived Myofibroblasts or Inflammatory Cells and Not Hepatocytes Is Deleterious. Gene Expr 2018; 19:15-24. [PMID: 30029699 PMCID: PMC6290324 DOI: 10.3727/105221618x15320123457380] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In Wilson's disease, Atp7b mutations impair copper excretion with liver or brain damage. Healthy transplanted hepatocytes repopulate the liver, excrete copper, and reverse hepatic damage in animal models of Wilson's disease. In Fah-/- mice with tyrosinemia and α-1 antitrypsin mutant mice, liver disease is resolved by expansions of healthy hepatocytes derived from transplanted healthy bone marrow stem cells. This potential of stem cells has not been defined for Wilson's disease. In diseased Atp7b-/- mice, we reconstituted bone marrow with donor cells expressing green fluorescent protein reporter from healthy transgenic mice. Mature hepatocytes originating from donor bone marrow were identified by immunostaining for green fluorescence protein and bile canalicular marker, dipeptidylpeptidase-4. Mesenchymal and inflammatory cell markers were used for other cells from donor bone marrow cells. Gene expression, liver tests, and tissues were analyzed for outcomes in Atp7b-/- mice. After bone marrow transplantation in Atp7b-/- mice, donor-derived hepatocytes containing bile canaliculi appeared within weeks. Despite this maturity, donor-derived hepatocytes neither divided nor expanded. The liver of Atp7b-/- mice was not repopulated by donor-derived hepatocytes: Atp7b mRNA remained undetectable; liver tests, copper content, and fibrosis actually worsened. Restriction of proliferation in hepatocytes accompanied oxidative DNA damage. By contrast, donor-derived mesenchymal and inflammatory cells extensively proliferated. These contributed to fibrogenesis through greater expression of inflammatory cytokines. In Wilson's disease, donor bone marrow-derived cells underwent different fates: hepatocytes failed to proliferate; inflammatory cells proliferated to worsen disease outcomes. This will help guide stem cell therapies for conditions with proinflammatory or profibrogenic microenvironments.
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Affiliation(s)
- Yogeshwar Sharma
- *Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Jinghua Liu
- †Department of Obstetrics and Gynecology, Shanghai Public Health Clinical Center, Shanghai, P.R. China
| | | | - Antonia Follenzi
- §Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
- ¶Department of Health Sciences, Università del Piemonte Orientale “A. Avogadro”, Novara, Italy
| | - Sanjeev Gupta
- *Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- §Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
- #Marion Bessin Liver Research Center, Diabetes Center, Cancer Center, and Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, USA
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22
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Kakabadze Z, Karalashvili L, Chakhunashvili D, Havlioglu N, Janelidze M, Kakabadze A, Sharma Y, Gupta S. Decellularized bovine placentome for portacavally-interposed heterotopic liver transplantation in rats. Mater Sci Eng C Mater Biol Appl 2018; 97:293-301. [PMID: 30678914 DOI: 10.1016/j.msec.2018.12.025] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 11/19/2018] [Accepted: 12/09/2018] [Indexed: 02/06/2023]
Abstract
Scaffolds from healthy placentae offer advantages for tissue engineering with undamaged matrix, associated cytoprotective molecules, and embedded vessels for revascularization. As size disparities in human placenta and small recipients hamper preclinical studies, we studied alternative of bovine placentomes in smaller size ranges. Multiple cow placentomes were decellularized and anatomical integrity was analyzed. Tissue engineering used inbred donor rat livers. Placentomes were hepatized and immediately transplanted in rats with perfusion from portal vein and drainage into inferior vena cava. Cows yielded 99 ± 16 placentomes each. Of these, approximately 25% had 3 to 9 cm diameter and 7 to 63 ml volume, which was suitable for transplantation. After decellularization, angiography and casts documented 100% of vessels and vascular networks were well-perfused without disruptions or leaks. The residual matrix also remained intact for transplantation of placentomes. Perfusion in transplanted placentomes was maintained over up to 30 days. Liver tissue reassembled with restoration of hepatic acinar and sinusoidal structure. Transplanted tissue was intact without apoptosis, or necrosis. Hepatic functions were maintained. Preservation of hepatic homeostasis was verified by cytofluorimetric analysis of hepatocyte ploidy. The prevalence in healthy and transplanted liver of diploid, tetraploid and higher ploidy classes was similar with 57%, 41% and 2% versus 51%, 46.5% and 2.6%, respectively, p = 0.77, ANOVA. CONCLUSIONS: Cow placentomes will allow therapeutic development with disease models in small animals. This will also advance drug or toxicology studies. Portasystemic interposition of engineered liver will be particularly suitable for treating hepatic insufficiencies (metabolic, secretory or detoxification needs), including for children or smaller adults.
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Affiliation(s)
- Zurab Kakabadze
- Department of Clinical Anatomy, Tbilisi State Medical University, 33 V. PshavelaAvenue, 0177 Tbilisi, Georgia.
| | - Lia Karalashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, 33 V. PshavelaAvenue, 0177 Tbilisi, Georgia
| | - David Chakhunashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, 33 V. PshavelaAvenue, 0177 Tbilisi, Georgia
| | - Necat Havlioglu
- Department of Veterans Affairs, Pathology and Laboratory Services, VA Medical Center, Saint Louis Health Care System, Saint Louis, MO, USA
| | - Merab Janelidze
- Department of Clinical Anatomy, Tbilisi State Medical University, 33 V. PshavelaAvenue, 0177 Tbilisi, Georgia
| | - Ann Kakabadze
- Department of Clinical Anatomy, Tbilisi State Medical University, 33 V. PshavelaAvenue, 0177 Tbilisi, Georgia
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx 10461, NY, USA.
| | - Sanjeev Gupta
- Departments of Medicine and Pathology, Marion Bessin Liver Research Center, Diabetes Center, The Irwin S. and Sylvia Chanin Institute for Cancer Research, Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx 10461, NY, USA.
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Wu CH, Chen CH, Chen PH, Yang JJ, Chang PC, Huang TC, Bagga S, Sharma Y, Lin RM, Chan DC. Identifying characteristics of an effective fracture liaison service: systematic literature review. Osteoporos Int 2018. [PMID: 29525971 DOI: 10.1007/s00198-017-4370-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Fracture liaison services (FLS) have been demonstrated to improve outcomes following osteoporotic fracture. The aim of this systematic literature review (SLR) was to determine the characteristics of an FLS that lead to improved patient outcomes. We conducted a SLR, including articles published between 2000 and February 2017, using global (Medline, EMBASE, PubMed and Cochrane Library) and local databases. Studies including patients aged ≥ 50 years with osteoporotic fractures enrolled in an FLS were assessed. Information extracted from each article included key person coordinating the FLS (physician, nurse or other healthcare professional), setting (hospital vs community), intensity (single vs multiple), duration (long vs short term), fracture type and gender. A meta-analysis of randomised controlled trials was conducted based on the key person coordinating the FLS. Out of 7236 articles, 57 were considered to be high quality and identified for further analysis. The SLR identified several components which contributed to FLS success, including multidisciplinary involvement, driven by a dedicated case manager, regular assessment and follow-up, multifaceted interventions and patient education. Meta-analytic data confirm the effectiveness of an FLS following an osteoporotic fracture: approximate 27% increase in the likelihood of BMD testing and up to 21% increase in the likelihood of treatment initiation compared with usual care. The balance of evidence indicates that the multifaceted FLS and dedicated coordination are important success factors that contribute to effective FLS interventions which reduce fracture-related morbidity and mortality.
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Affiliation(s)
- C-H Wu
- Department of Family Medicine, National Cheng Kung University College of Medicine and Hospital, Tainan, Taiwan
- Institute of Gerontology, National Cheng Kung University College of Medicine, Tainan, Taiwan
| | - C-H Chen
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthopaedics, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Division of Adult Reconstruction Surgery, Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - P-H Chen
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Yunlin, Taiwan
| | - J-J Yang
- Department of Internal Medicine, Po Jen General Hospital, Taipei City, Taiwan
| | - P-C Chang
- Department of Orthopedics, An Nan Hospital, China Medical University, Tainan, Taiwan
| | - T-C Huang
- National Taiwan University Hospital Chu-Tung Branch, Hsinchu, Taiwan
| | - S Bagga
- Complete HEOR Solutions LLC, 1046 Knapp Road, North Wales, PA, 19454, USA
| | - Y Sharma
- Complete HEOR Solutions LLC, 1046 Knapp Road, North Wales, PA, 19454, USA
| | - R-M Lin
- Tainan Municipal An-Nan Hospital-China Medical University, Tainan, Taiwan
| | - D-C Chan
- National Taiwan University Hospital Chu-Tung Branch, Hsinchu, Taiwan.
- Department of Geriatrics and Gerontology, National Taiwan University Hospital, Taipei, Taiwan.
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
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Kakabadze Z, Kakabadze A, Chakhunashvili D, Karalashvili L, Berishvili E, Sharma Y, Gupta S. Decellularized human placenta supports hepatic tissue and allows rescue in acute liver failure. Hepatology 2018; 67:1956-1969. [PMID: 29211918 PMCID: PMC5906146 DOI: 10.1002/hep.29713] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [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: 07/13/2017] [Revised: 11/29/2017] [Accepted: 12/04/2017] [Indexed: 12/29/2022]
Abstract
UNLABELLED Tissue engineering with scaffolds to form transplantable organs is of wide interest. Decellularized tissues have been tested for this purpose, although supplies of healthy donor tissues, vascular recellularization for perfusion, and tissue homeostasis in engineered organs pose challenges. We hypothesized that decellularized human placenta will be suitable for tissue engineering. The universal availability and unique structures of placenta for accommodating tissue, including presence of embedded vessels, were major attractions. We found decellularized placental vessels were reendothelialized by adjacent native cells and bridged vessel defects in rats. In addition, implantation of liver fragments containing all cell types successfully hepatized placenta with maintenance of albumin and urea synthesis, as well as hepatobiliary transport of 99m Tc-mebrofenin, up to 3 days in vitro. After hepatized placenta containing autologous liver was transplanted into sheep, tissue units were well-perfused and self-assembled. Histological examination indicated transplanted tissue retained hepatic cord structures with characteristic hepatic organelles, such as gap junctions, and hepatic sinusoids lined by endothelial cells, Kupffer cells, and other cell types. Hepatocytes in this neo-organ expressed albumin and contained glycogen. Moreover, transplantation of hepatized placenta containing autologous tissue rescued sheep in extended partial hepatectomy-induced acute liver failure. This rescue concerned amelioration of injury and induction of regeneration in native liver. The grafted hepatized placenta was intact with healthy tissue that neither proliferated nor was otherwise altered. CONCLUSION The unique anatomic structure and matrix of human placenta were effective for hepatic tissue engineering. This will advance applications ranging from biological studies, drug development, and toxicology to patient therapies. (Hepatology 2018;67:1956-1969).
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Affiliation(s)
- Zurab Kakabadze
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - Ann Kakabadze
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - David Chakhunashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - Lia Karalashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - Ekaterine Berishvili
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | | | - Sanjeev Gupta
- Department of Medicine, Bronx, New York, USA,Department of Pathology, Marion Bessin Liver Research Center, Diabetes Center, The Irwin S. and Sylvia Chanin Institute for Cancer Research, Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York, USA
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25
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Kakabadze Z, Kakabadze A, Chakhunashvili D, Karalashvili L, Berishvili E, Sharma Y, Gupta S. Decellularized human placenta supports hepatic tissue and allows rescue in acute liver failure. Hepatology 2018. [PMID: 29211918 DOI: 10.1002/hep.v67.5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
UNLABELLED Tissue engineering with scaffolds to form transplantable organs is of wide interest. Decellularized tissues have been tested for this purpose, although supplies of healthy donor tissues, vascular recellularization for perfusion, and tissue homeostasis in engineered organs pose challenges. We hypothesized that decellularized human placenta will be suitable for tissue engineering. The universal availability and unique structures of placenta for accommodating tissue, including presence of embedded vessels, were major attractions. We found decellularized placental vessels were reendothelialized by adjacent native cells and bridged vessel defects in rats. In addition, implantation of liver fragments containing all cell types successfully hepatized placenta with maintenance of albumin and urea synthesis, as well as hepatobiliary transport of 99m Tc-mebrofenin, up to 3 days in vitro. After hepatized placenta containing autologous liver was transplanted into sheep, tissue units were well-perfused and self-assembled. Histological examination indicated transplanted tissue retained hepatic cord structures with characteristic hepatic organelles, such as gap junctions, and hepatic sinusoids lined by endothelial cells, Kupffer cells, and other cell types. Hepatocytes in this neo-organ expressed albumin and contained glycogen. Moreover, transplantation of hepatized placenta containing autologous tissue rescued sheep in extended partial hepatectomy-induced acute liver failure. This rescue concerned amelioration of injury and induction of regeneration in native liver. The grafted hepatized placenta was intact with healthy tissue that neither proliferated nor was otherwise altered. CONCLUSION The unique anatomic structure and matrix of human placenta were effective for hepatic tissue engineering. This will advance applications ranging from biological studies, drug development, and toxicology to patient therapies. (Hepatology 2018;67:1956-1969).
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Affiliation(s)
- Zurab Kakabadze
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - Ann Kakabadze
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - David Chakhunashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - Lia Karalashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - Ekaterine Berishvili
- Department of Clinical Anatomy, Tbilisi State Medical University, Tbilisi, Georgia
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY
| | - Sanjeev Gupta
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY
- Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY
- Diabetes Center, Albert Einstein College of Medicine, Bronx, NY
- The Irwin S. and Sylvia Chanin Institute for Cancer Research, Albert Einstein College of Medicine, Bronx, NY
- Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY
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26
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Viswanathan P, Sharma Y, Gupta P, Gupta S. Replicative stress and alterations in cell cycle checkpoint controls following acetaminophen hepatotoxicity restrict liver regeneration. Cell Prolif 2018; 51:e12445. [PMID: 29504225 DOI: 10.1111/cpr.12445] [Citation(s) in RCA: 21] [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: 11/10/2017] [Accepted: 01/16/2018] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES Acetaminophen hepatotoxicity is a leading cause of hepatic failure with impairments in liver regeneration producing significant mortality. Multiple intracellular events, including oxidative stress, mitochondrial damage, inflammation, etc., signify acetaminophen toxicity, although how these may alter cell cycle controls has been unknown and was studied for its significance in liver regeneration. MATERIALS AND METHODS Assays were performed in HuH-7 human hepatocellular carcinoma cells, primary human hepatocytes and tissue samples from people with acetaminophen-induced acute liver failure. Cellular oxidative stress, DNA damage and cell proliferation events were investigated by mitochondrial membrane potential assays, flow cytometry, fluorescence staining, comet assays and spotted arrays for protein expression after acetaminophen exposures. RESULTS In experimental groups with acetaminophen toxicity, impaired mitochondrial viability and substantial DNA damage were observed with rapid loss of cells in S and G2/M and cell cycle restrictions or even exit in the remainder. This resulted from altered expression of the DNA damage regulator, ATM and downstream transducers, which imposed G1/S checkpoint arrest, delayed entry into S and restricted G2 transit. Tissues from people with acute liver failure confirmed hepatic DNA damage and cell cycle-related lesions, including restrictions of hepatocytes in aneuploid states. Remarkably, treatment of cells with a cytoprotective cytokine reversed acetaminophen-induced restrictions to restore cycling. CONCLUSIONS Cell cycle lesions following mitochondrial and DNA damage led to failure of hepatic regeneration in acetaminophen toxicity but their reversibility offers molecular targets for treating acute liver failure.
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Affiliation(s)
- Preeti Viswanathan
- Division of Pediatric Gastroenterology and Hepatology, Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Priya Gupta
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Sanjeev Gupta
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA.,Marion Bessin Liver Research Center, Diabetes Center, Irwin S. and Sylvia Chanin Institute for Cancer Research, Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, USA
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Sharma Y, Thompson CH, Kaambwa B, Shahi R, Hakendorf P, Miller M. Investigation of the benefits of early malnutrition screening with telehealth follow up in elderly acute medical admissions. QJM 2017; 110:639-647. [PMID: 28472530 DOI: 10.1093/qjmed/hcx095] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The benefit of providing early nutrition intervention and its continuation post-discharge in older hospitalized patients is unclear. This study examined efficacy of such an intervention in older patients discharged from acute care. METHODS In this randomized controlled trial, 148 malnourished patients were randomized to receive either a nutrition intervention for 3 months or usual care. Intervention included an individualized nutrition care plan plus monthly post-discharge telehealth follow-up whereas control patients received intervention only upon referral by their treating clinicians. Nutrition status was determined by the Patient Generated Subjective Global Assessment (PG-SGA) tool. Clinical outcomes included changes in length of hospital stay, complications during hospitalization, Quality of life (QoL), mortality and re-admission rate. RESULTS Fifty-four males and 94 females (mean age, 81.8 years) were included. Both groups significantly improved PG-SGA scores from baseline. There was no between-group differences in the change in PG-SGA scores and final PG-SGA scores were similar at 3 months 6.9 (95% CI 5.6-8.3) vs. 5.8 (95% CI 4.8-6.9) (P = 0.09), in control and intervention groups, respectively. Median total length of hospital stay was 6 days shorter in the intervention group (11.4 (IQR 16.6) vs. 5.4 (IQR 8.1) (P = 0.01). There was no significant difference in complication rate during hospitalization, QoL and mortality at 3-months or readmission rate at 1, 3 or 6 months following hospital discharge. CONCLUSION In older malnourished inpatients, an early and extended nutrition intervention showed a trend towards improved nutrition status and significantly reduced length of hospital stay.
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Affiliation(s)
- Y Sharma
- Department of General Medicine, Flinders Medical Centre, South Australia, School of Medicine, Flinders University, Adelaide, South Australia 5042
| | - C H Thompson
- Discipline of Medicine, University of Adelaide, Adelaide, South Australia 5005
| | - B Kaambwa
- Department of Health Economics, Flinders University, Adelaide, South Australia 5042
| | - R Shahi
- Faculty of Medicine, Health and Nursing, Monash University, Melbourne, Australia 3800
| | - P Hakendorf
- Department of Clinical Epidemiology, Flinders Medical Centre, Adelaide, South Australia 5042
| | - M Miller
- Department of Nutrition & Dietetics, Flinders University, Adelaide, South Australia 5042
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Sharma Y, Thompson C, Shari R, Hakendorf P, Miller M. Malnutrition in Acutely Unwell Hospitalized Elderly - "The Skeletons Are Still Rattling in the Hospital Closet". J Nutr Health Aging 2017; 21:1210-1215. [PMID: 29188881 DOI: 10.1007/s12603-017-0903-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Malnutrition is common in hospitalized patients with prevalence rates of up to 30% in Australian hospitals with adverse consequences for both the patients and health care services. Despite formulation of nutritional screening protocols, not all hospitalized patients get nutritional screening. Real life screening rates of hospitalized elderly patients are unknown. AIM The present study explored nutrition screening rate in acutely unwell elderly patients admitted in a large tertiary hospital and how these patients fared depending upon their nutrition status. METHODS A prospective cross-sectional study involving 205 general medical patients ≥60years recruited between November 2014 and November 2015. The number of patients who missed nutrition screening were noted and all patients underwent nutritional assessment by a qualified dietitian using PG-SGA and quality of life was measured using EQ-5D 5L. A survival curve was plotted and multivariate cox proportional hazard model was used to adjust for confounders. RESULTS Only 99 (49.7%) patients underwent nutritional screening. One hundred and six (53.5%) patients were confirmed as malnourished by PG-SGA. Malnourished patients had significantly longer length of hospital stay and had worse quality of life. Mortality was significantly higher in malnourished patients at one year (23 (21.7%) vs 4 (4.3%); p<0.001) and cox proportional hazard model suggests that malnutrition significantly affects survival even after adjustment for confounders like age, sex, Charlson index and polypharmacy. CONCLUSION This study confirms that nutrition screening is still suboptimal in elderly hospitalized patients with adverse consequences and suggests need for review of policies to improve screening practices.
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Affiliation(s)
- Y Sharma
- Michelle Miller, Flinders University, Australia,
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Abstract
Wilson's disease (WD) is characterized by the inability to excrete copper (Cu) from the body with progressive tissue injury, especially in liver and brain. The molecular defect in WD concerns mutations in ATP7B gene leading to loss of Cu transport from the hepatocyte to the bile canaliculus. While drugs, e.g., Cu chelators, have been available for several decades, these must be taken lifelong, which can be difficult due to issues of compliance or side effects. Many individuals may require liver transplantation, which can also be difficult due to donor organ shortages. Therefore, achieving permanent cures via cell or gene therapy are of great interest for WD. Cell therapy is feasible because transplanted hepatocytes can integrate in liver parenchyma and restore deficient functions, including transport of Cu into bile. The availability of authentic animal models that recapitulate hepatic WD, especially the Long-Evans Cinnamon (LEC) rat, has advanced cell transplantation research in WD. We describe requirements for cell therapy in animal models with several standardized methods for studies to test or refine cell therapy strategies in WD.
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Affiliation(s)
- Fadi Luc Jaber
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Yogeshwar Sharma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Sanjeev Gupta
- Departments of Medicine and Pathology, Marion Bessin Liver Research Center, Diabetes Center, Cancer Center, Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Ullmann Building, Room 625, 1300 Morris Park Avenue, Bronx, NY, 10461, USA.
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Abstract
A 3-step continuous flow oxidation of alcohols is demonstrated with continuous generation of chlorine as the first step followed by its use for the flow synthesis of high strength sodium hypochlorite.
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Affiliation(s)
- Y. Sharma
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR-National Chemical Laboratory (NCL) Campus
- Pune - 411008
- India
- Chem. Eng. & Proc. Dev
| | - S. Moolya
- Chem. Eng. & Proc. Dev
- CSIR-National Chemical Laboratory
- Pune - 411008
- India
| | - R. A. Joshi
- Org. Chem. Div
- CSIR-National Chemical Laboratory
- Pune - 411008
- India
| | - A. A. Kulkarni
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR-National Chemical Laboratory (NCL) Campus
- Pune - 411008
- India
- Chem. Eng. & Proc. Dev
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Sharma Y, Khan L, Manzoor N. Anti-Candida activity of geraniol involves disruption of cell membrane integrity and function. J Mycol Med 2016; 26:244-54. [DOI: 10.1016/j.mycmed.2016.04.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 04/07/2016] [Accepted: 04/07/2016] [Indexed: 10/21/2022]
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Rivas MA, Graham D, Sulem P, Stevens C, Desch AN, Goyette P, Gudbjartsson D, Jonsdottir I, Thorsteinsdottir U, Degenhardt F, Mucha S, Kurki MI, Li D, D'Amato M, Annese V, Vermeire S, Weersma RK, Halfvarson J, Paavola-Sakki P, Lappalainen M, Lek M, Cummings B, Tukiainen T, Haritunians T, Halme L, Koskinen LLE, Ananthakrishnan AN, Luo Y, Heap GA, Visschedijk MC, MacArthur DG, Neale BM, Ahmad T, Anderson CA, Brant SR, Duerr RH, Silverberg MS, Cho JH, Palotie A, Saavalainen P, Kontula K, Färkkilä M, McGovern DPB, Franke A, Stefansson K, Rioux JD, Xavier RJ, Daly MJ, Barrett J, de Lane K, Edwards C, Hart A, Hawkey C, Jostins L, Kennedy N, Lamb C, Lee J, Lees C, Mansfield J, Mathew C, Mowatt C, Newman B, Nimmo E, Parkes M, Pollard M, Prescott N, Randall J, Rice D, Satsangi J, Simmons A, Tremelling M, Uhlig H, Wilson D, Abraham C, Achkar JP, Bitton A, Boucher G, Croitoru K, Fleshner P, Glas J, Kugathasan S, Limbergen JV, Milgrom R, Proctor D, Regueiro M, Schumm PL, Sharma Y, Stempak JM, Targan SR, Wang MH. A protein-truncating R179X variant in RNF186 confers protection against ulcerative colitis. Nat Commun 2016; 7:12342. [PMID: 27503255 PMCID: PMC4980482 DOI: 10.1038/ncomms12342] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 06/24/2016] [Indexed: 01/05/2023] Open
Abstract
Protein-truncating variants protective against human disease provide in vivo validation of therapeutic targets. Here we used targeted sequencing to conduct a search for protein-truncating variants conferring protection against inflammatory bowel disease exploiting knowledge of common variants associated with the same disease. Through replication genotyping and imputation we found that a predicted protein-truncating variant (rs36095412, p.R179X, genotyped in 11,148 ulcerative colitis patients and 295,446 controls, MAF=up to 0.78%) in RNF186, a single-exon ring finger E3 ligase with strong colonic expression, protects against ulcerative colitis (overall P=6.89 × 10(-7), odds ratio=0.30). We further demonstrate that the truncated protein exhibits reduced expression and altered subcellular localization, suggesting the protective mechanism may reside in the loss of an interaction or function via mislocalization and/or loss of an essential transmembrane domain.
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Affiliation(s)
- Manuel A. Rivas
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Daniel Graham
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | | | - Christine Stevens
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | - A. Nicole Desch
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | - Philippe Goyette
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
| | - Daniel Gudbjartsson
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- School of Engineering and Natural Sciences, University of Iceland, 101 Reykjavik, Iceland
| | - Ingileif Jonsdottir
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Department of Immunology, Landspitali, the National University Hospital of Iceland, 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - Unnur Thorsteinsdottir
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - Frauke Degenhardt
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Sören Mucha
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Mitja I. Kurki
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Dalin Li
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Mauro D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, 14183 Stockholm, Sweden
- BioCruces Health Research Institute and IKERBASQUE, Basque Foundation for Science, 48903 Bilbao, Spain
| | - Vito Annese
- Unit of Gastroenterology, Istituto di Ricovero e Cura a Carattere Scientifico-Casa Sollievo della Sofferenza (IRCCS-CSS) Hospital, 71013 San Giovanni Rotondo, Italy
- Strutture Organizzative Dipartimentali (SOD) Gastroenterologia 2, Azienda Ospedaliero Universitaria (AOU) Careggi, 50134 Florence, Italy
| | - Severine Vermeire
- Department of Clinical and Experimental Medicine, Translational Research in GastroIntestinal Disorders (TARGID), Katholieke Universiteit (KU) Leuven, Leuven 3000, Belgium
- Division of Gastroenterology, University Hospital Gasthuisberg, BE-3000 Leuven, Belgium
| | - Rinse K. Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Jonas Halfvarson
- Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, SE 701 82 Örebro, Sweden
| | - Paulina Paavola-Sakki
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Clinic of Gastroenterology, Helsinki University Hospital, 00100 Helsinki, Finland
| | - Maarit Lappalainen
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Research Programs Unit, Immunobiology, and Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland
| | - Monkol Lek
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Beryl Cummings
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Taru Tukiainen
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Leena Halme
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - Lotta L. E. Koskinen
- Research Programs Unit, Immunobiology, and Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland
- Department of Medical Genetics, Biomedicum Helsinki, University of Helsinki, 00100 Helsinki, Finland
| | - Ashwin N. Ananthakrishnan
- Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Division of Medical Sciences, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Yang Luo
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK
| | - Graham A. Heap
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - Marijn C. Visschedijk
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Daniel G. MacArthur
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Benjamin M. Neale
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Tariq Ahmad
- Peninsula College of Medicine and Dentistry, Exeter PL6 8BU, UK
| | - Carl A. Anderson
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK
| | - Steven R. Brant
- Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, 21205, USA
| | - Richard H. Duerr
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania 15261, USA
| | - Mark S. Silverberg
- Department of Medicine, Inflammatory Bowel Disease Centre, Mount Sinai Hospital, Toronto, Ontario, Canada M5G 1X5
| | - Judy H Cho
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - Aarno Palotie
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Institute for Molecular Medicine Finland, University of Helsinki, 00100 Helsinki, Finland
- Massachusetts General Hospital, Center for Human Genetic Research, Psychiatric and Neurodevelopmental Genetics Unit, Boston, Massachusetts 02114, USA
| | - Päivi Saavalainen
- Research Programs Unit, Immunobiology, University of Helsinki, 00100 Helsinki, Finland
| | - Kimmo Kontula
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
| | - Martti Färkkilä
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Clinic of Gastroenterology, Helsinki University Hospital, 00100 Helsinki, Finland
| | - Dermot P. B. McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Kari Stefansson
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - John D. Rioux
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
- Faculté de Médecine, Université de Montréal, Montréal, Québec, Canada H3T 1J4
| | - Ramnik J. Xavier
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Mark J. Daly
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - J. Barrett
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - K. de Lane
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - C. Edwards
- Department of Gastroenterology, Torbay Hospital, Devon, UK
| | - A. Hart
- Department of Medicine, St. Mark's Hospital, Middlesex, UK
| | - C. Hawkey
- Nottingham Digestive Disease Centre, Queens Medical Centre, Nottingham, UK
| | - L. Jostins
- Wellcome Trust Centre for Human Genetics, University of Oxford, Headington, UK
- Christ Church, University of Oxford, Oxford, UK
| | - N. Kennedy
- Gastrointestinal Unit, Wester General Hospital, University of Edinburgh, Edinburgh, UK
| | - C. Lamb
- Newcastle University, Newcastle upon Tyne, UK
| | - J. Lee
- Inflammatory Bowel Disease Research Group, Addenbrooke's Hospital, Cambridge, UK
| | - C. Lees
- Gastrointestinal Unit, Wester General Hospital, University of Edinburgh, Edinburgh, UK
| | | | - C. Mathew
- Department of Medical and Molecular Genetics, Guy's Hospital, London, UK
- Department of Medical and Molecular Genetics, King's College London School of Medicine, Guy's Hospital, London, UK
| | - C. Mowatt
- Department of Medicine, Ninewells Hospital and Medical School, Dundee, UK
| | - B. Newman
- Genetic Medicine, Manchester Academic Health Science Centre, Manchester, UK
- The Manchester Centre for Genomic Medicine, University of Manchester, Manchester, UK
| | - E. Nimmo
- Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK
| | - M. Parkes
- Inflammatory Bowel Disease Research Group, Addenbrooke's Hospital, Cambridge, UK
| | - M. Pollard
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - N. Prescott
- Department of Medical and Molecular Genetics, Guy's Hospital, London, UK
- Department of Medical and Molecular Genetics, King's College London School of Medicine, Guy's Hospital, London, UK
| | - J. Randall
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - D. Rice
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - J. Satsangi
- Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK
| | - A. Simmons
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
- Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - M. Tremelling
- Gastroenterology & General Medicine, Norfolk and Norwich University Hospital, Norwich, UK
| | - H. Uhlig
- Translational Gastroenterology Unit and the Department of Pediatrics, University of Oxford, Oxford, UK
| | - D. Wilson
- Pediatric Gastroenterology and Nutrition, Royal Hospital for Sick Children, Edinburgh, UK
- Child Life and Health, University of Edinburgh, Edinburgh, UK
| | - C. Abraham
- Section of Digestive Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - J. P. Achkar
- Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - A. Bitton
- Division of Gastroenterology, Royal Victoria Hospital, Montréal, Québec, Canada
| | - G. Boucher
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
| | - K. Croitoru
- Inflammatory Bowel Disease Group, Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - P. Fleshner
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - J. Glas
- Division of Gastroenterology, Royal Victoria Hospital, Montréal, Québec, Canada
| | - S. Kugathasan
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - J. V. Limbergen
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, Toronto, Ontario, Canada
| | - R. Milgrom
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - D. Proctor
- Section of Digestive Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - M. Regueiro
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania 15261, USA
| | - P. L. Schumm
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Y. Sharma
- Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - J. M. Stempak
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - S. R. Targan
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - M. H. Wang
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA
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Yu Y, Guerrero CR, Liu S, Amato NJ, Sharma Y, Gupta S, Wang Y. Comprehensive Assessment of Oxidatively Induced Modifications of DNA in a Rat Model of Human Wilson's Disease. Mol Cell Proteomics 2015; 15:810-7. [PMID: 26362317 DOI: 10.1074/mcp.m115.052696] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Indexed: 01/14/2023] Open
Abstract
Defective copper excretion from hepatocytes in Wilson's disease causes accumulation of copper ions with increased generation of reactive oxygen species via the Fenton-type reaction. Here we developed a nanoflow liquid chromatography-nanoelectrospray ionization-tandem mass spectrometry coupled with the isotope-dilution method for the simultaneous quantification of oxidatively induced DNA modifications. This method enabled measurement, in microgram quantities of DNA, of four oxidative stress-induced lesions, including direct ROS-induced purine cyclonucleosides (cPus) and two exocyclic adducts induced by byproducts of lipid peroxidation, i.e. 1,N(6)-etheno-2'-deoxyadenosine (εdA) and 1,N(2)-etheno-2'-deoxyguanosine (εdG). Analysis of liver tissues of Long-Evans Cinnamon rats, which constitute an animal model of human Wilson's disease, and their healthy counterparts [i.e. Long-Evans Agouti rats] showed significantly higher levels of all four DNA lesions in Long-Evans Cinnamon than Long-Evans Agouti rats. Moreover, cPus were present at much higher levels than εdA and εdG lesions. In contrast, the level of 5-hydroxymethyl-2'-deoxycytidine (5-HmdC), an oxidation product of 5-methyl-2'-deoxycytidine (5-mdC), was markedly lower in the liver tissues of Long-Evans Cinnamon than Long-Evans Agouti rats, though no differences were observed for the levels of 5-mdC. In vitro biochemical assay showed that Cu(2+) ions could directly inhibit the activity of Tet enzymes. Together, these results suggest that aberrant copper accumulation may perturb genomic stability by elevating oxidatively induced DNA lesions, and by altering epigenetic pathways of gene regulation.
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Affiliation(s)
- Yang Yu
- From the ‡Environmental Toxicology Graduate Program and
| | - Candace R Guerrero
- §Department of Chemistry, University of California, Riverside, California 92521
| | - Shuo Liu
- From the ‡Environmental Toxicology Graduate Program and
| | - Nicholas J Amato
- §Department of Chemistry, University of California, Riverside, California 92521
| | | | - Sanjeev Gupta
- ¶Department of Medicine and ‖Department of Pathology, **Marion Bessin Liver Research Center, Diabetes Center, Cancer Center, and Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York 10461
| | - Yinsheng Wang
- From the ‡Environmental Toxicology Graduate Program and §Department of Chemistry, University of California, Riverside, California 92521;
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Sharma Y, Phillion AB, Martinez DM. Automated segmentation of wood fibres in micro-CT images of paper. J Microsc 2015; 260:400-10. [PMID: 26301453 DOI: 10.1111/jmi.12308] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 02/13/2015] [Accepted: 07/26/2015] [Indexed: 11/28/2022]
Abstract
A novel algorithm has been developed and validated to isolate individual papermaking fibres in micro-computed tomographic images of paper handsheets as a first step to characterize the structure of the paper. The three-step fibre segmentation algorithm segments the papermaking fibres by (i) tracking the hollow inside the fibres via a modified connected component methodology, (ii) extracting the fibre walls using a distance transform and (iii) labelling the fibres through collapsed sections by a final refinement step. Furthermore, postprocessing algorithms have been developed to calculate the length and coarseness of the segmented fibres. The fibre segmentation algorithm is the first ever reported method for the automated segmentation of the tortuous three-dimensional morphology of papermaking fibres within microstructural images of paper handsheets. The method is not limited to papermaking fibres, but can be applied to any material consisting of tortuous and hollow fibres.
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Affiliation(s)
- Y Sharma
- Department of Mechanical Engineering, The University of British Columbia, Vancouver, Canada.,School of Engineering, Okanagan Campus, The University of British Columbia, Kelowna, Canada
| | - A B Phillion
- School of Engineering, Okanagan Campus, The University of British Columbia, Kelowna, Canada
| | - D M Martinez
- Department of Mechanical Engineering, The University of British Columbia, Vancouver, Canada.,Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, Canada
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Sharma Y, Joshi RA, Kulkarni AA. Continuous-Flow Nitration of o-Xylene: Effect of Nitrating Agent and Feasibility of Tubular Reactors for Scale-Up. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00064] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Y. Sharma
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune-411 008, India
| | - R. A. Joshi
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune-411 008, India
| | - A. A. Kulkarni
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune-411 008, India
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Bhatnagar R, Sharma Y, Mohan M, Vajpayee RB, Azad RV, Mukesh K. Does milk have a cataractogenic effect. A weighing of clinical evidence. Dev Ophthalmol 2015; 17:93-6. [PMID: 2507368 DOI: 10.1159/000417008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- R Bhatnagar
- Dr. Rajendra Prasad Centre for Ophthalmic Sciences, AIIMS, Ansari Nagar, New Delhi, India
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Gupta P, Sharma Y, Bandi S, Vishwanathan P, Gupta S. A Convenient Human Hepatocyte Model for Molecular Mechanisms in Caffeine Preconditioning and Protection from Acetaminophen (APAP)‐Induced Hepatotoxicity. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.1004.12] [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: 11/11/2022]
Affiliation(s)
- Priya Gupta
- Departments of Medicine and PathologyDivision of Pediatric GastroenterologyChildren's Hospital at Montefiore and Albert Einstein College of MedicineBronxNew York (NY)United States
| | - Yogeshwar Sharma
- Departments of Medicine and PathologyDivision of Pediatric GastroenterologyChildren's Hospital at Montefiore and Albert Einstein College of MedicineBronxNew York (NY)United States
| | - Sriram Bandi
- Departments of Medicine and PathologyDivision of Pediatric GastroenterologyChildren's Hospital at Montefiore and Albert Einstein College of MedicineBronxNew York (NY)United States
| | - Preeti Vishwanathan
- Departments of Medicine and PathologyDivision of Pediatric GastroenterologyChildren's Hospital at Montefiore and Albert Einstein College of MedicineBronxNew York (NY)United States
| | - Sanjeev Gupta
- Departments of Medicine and PathologyDivision of Pediatric GastroenterologyChildren's Hospital at Montefiore and Albert Einstein College of MedicineBronxNew York (NY)United States
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Kumar M, Sharma Y, Bandi S, Gupta S. Endogenous antiviral microRNAs determine permissiveness for hepatitis B virus replication in cultured human fetal and adult hepatocytes. J Med Virol 2015; 87:1168-83. [PMID: 25690916 DOI: 10.1002/jmv.24145] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2014] [Indexed: 12/13/2022]
Abstract
Superior cell culture models for hepatitis B virus (HBV) will help advance insights into host-virus interactions. To identify mechanisms regulating HBV replication, this study used cultured human HepG2 cells and adult or fetal hepatocytes transduced with adenoviral vector to express HBV upstream of green fluorescent protein. The vector efficiently transduced all cell types. In HepG2 cells, replicative viral intermediates, nucleocapsid-associated HBcAg, and HBsAg were expressed. However, in fetal or adult hepatocytes, pregenomic HBV RNA and viral RNAs were expressed, but nucleocapsid-associated HBcAg in cells or HBsAg in culture medium were absent, indicating interruptions in viral replication due to possible microRNA-related interference. MicroRNA profiling demonstrated that a large number of microRNAs with antiviral potential were differentially expressed in hepatocytes after culture. In transfection assays using HepG2 cells, candidate antiviral microRNAs, e.g., hsa-miR-24 or hsa-miR-638 decreased the levels of HBV transcripts or HBV gene products. Since candidate microRNAs could have targeted interferon response genes as an alternative explanation interferon signaling was examined. However, HBV replication in cultured hepatocytes was not restored despite successful inhibition of JAK1/2-STAT signaling by the inhibitor, ruxolitinib. Therefore, HBV was unable to complete replication in cultured hepatocytes due to expression of multiple antiviral microRNAs. This mechanism should help understand restrictions in HBV replication for developing HBV models in cultured cells while providing frameworks for pathophysiological studies of HBV replication in subsets of hepatocytes or stem/progenitor cells during hepatitis.
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Affiliation(s)
- Mukesh Kumar
- Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, New York; Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
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Odaya S, Phillips R, Sharma Y, Bellerive J, Phillion A, Hoorfar M. X-ray Tomographic Analysis of Porosity Distributions in Gas Diffusion Layers of Proton Exchange Membrane Fuel Cells. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.143] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Misra P, Sharma Y, Katiyar RS. Effect of Current Compliance on Resistive Switching Characteristics of Amorphous Ternary Rare Earth Oxide SmGdO3 Thin Films Grown by Pulsed Laser Deposition. ACTA ACUST UNITED AC 2014. [DOI: 10.1149/06106.0133ecst] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jadhav MP, Jadhav PM, Shelke P, Sharma Y, Nadkar M. Assessment of use of complementary alternative medicine and its impact on quality of life in the patients attending rheumatology clinic, in a tertiary care centre in India. ACTA ACUST UNITED AC 2013. [PMID: 23196313 DOI: 10.4103/0019-5359.103961] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE Complementary and alternative medicine (CAM) has witnessed an increase in use in recent times in rheumatological conditions and is expected to have impact on the quality of life (QOL). We had planned to conduct this study to investigate the extent of use of CAM and its effect on QOL of patients at a tertiary care center. MATERIALS AND METHODS Ethics committee approval was obtained. Sixty patients suffering from osteoarthritis (OA) and rheumatoid arthritis (RA) were enrolled as per the selection criteria, after obtaining their informed consent. Each patient was interviewed for CAM use/non-use, and Western Ontario and McMaster Universities (WOMAC) (modified) index for QOL was recorded by the study personnel. STATISTICAL ANALYSIS The normality was checked by using Kolmogorov-Smirnov test. Descriptive statistics was performed and Mann-Whitney U-test was used to compare the QOL of CAM users and non-users. RESULTS Of the 60 patients enrolled with OA (10) and RA (50), 58% (35/60) used CAM. Ayurveda and massage therapy were the commonest [80% (28/35)], followed by yoga asana [34% (12/35)] and homoeopathy [20% (7/35)]. It was observed that combinations of therapies were used too. Nearly half [49% (17/35)] of the CAM users were on self-prescribed medication and 71% (25/35) of them did not inform the physician of CAM use. The QOL of CAM users (WOMAC score: 56.31 ± 6.82) was better than that of CAM non-users (WOMAC score: 60.16 ± 4.02) (P value 0.01). CONCLUSION Patients with RA frequently used CAM and QOL improvised with CAM use. We observed that self-administration of CAM was common and this was not informed to the treating physician.
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Affiliation(s)
- M P Jadhav
- Department of Infectious Diseases, Maharashtra University of Health Sciences, Seth G. S. Medical College and KEM Hospital, Parel, Mumbai, India
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Li JYZ, Yong TY, Hakendorf P, Roberts S, O'Brien L, Sharma Y, Ben-Tovim D, Thompson CH. Simple clinical score is associated with mortality and length of stay of acute general medical admissions to an Australian hospital. Intern Med J 2012; 42:160-5. [DOI: 10.1111/j.1445-5994.2011.02498.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Neogi U, Sharma Y, Sood V, Wanchu A, Banerjea AC. Diversity of HIV type 1 long terminal repeat (LTR) sequences following mother-to-child transmission in North India. AIDS Res Hum Retroviruses 2010; 26:1299-305. [PMID: 20929348 DOI: 10.1089/aid.2010.0128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We genetically characterized the extent of variation in HIV-1 LTR sequences from 11 mother-to-child transmission (MTCT) pairs from HIV-1-infected individuals from North India. Nine pairs were found to be infected with subtype C virus whereas two pairs were infected with subtype B virus. They harbored the characteristic three and two NF-κB sites, respectively. The analysis of intrasubtype divergence between B and C revealed greater diversity with subtype B LTR sequences than subtype C (p < 0.005). Significant evolutionary divergence of subtype C and subtype B was found in NFAT-III (p < 0.000001), NFAT-II (p < 0.0001), and USF (p < 0.005) transcription factor binding sites (TFBS). NF-κB-I, Sp I and II, Ets-I, AP-I and II, and TATA Box TFBS were highly conserved in both the subtypes. An alternate secondary structure of Tar was detected in the VT5 sample due to the point mutation from G to C (position +21) and T to C (position +38).
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Affiliation(s)
- Ujjwal Neogi
- Division of Virology, National Institute of Immunology, New Delhi, India
- St. John's National Academy of Health Sciences, Bangalore, India
- Division of Global Health, Karolinska Institutet, Stockholm, Sweden
| | - Yogeshwar Sharma
- Division of Virology, National Institute of Immunology, New Delhi, India
| | - Vikas Sood
- Division of Virology, National Institute of Immunology, New Delhi, India
| | - Ajay Wanchu
- Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Akhil C. Banerjea
- Division of Virology, National Institute of Immunology, New Delhi, India
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Sharma Y, Neogi U, Sood V, Banerjee S, Samrat S, Wanchu A, Singh S, Banerjea AC. Genetic and functional analysis of HIV-1 Rev Responsive Element (RRE) sequences from North-India. AIDS Res Ther 2010; 7:28. [PMID: 20682034 PMCID: PMC2920230 DOI: 10.1186/1742-6405-7-28] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Accepted: 08/03/2010] [Indexed: 11/10/2022] Open
Abstract
HIV-1 Rev protein regulates the expression of HIV-1 transcripts by binding to a highly structured stem loop structure called the Rev Responsive Element (RRE) present in the genomic and partially spliced RNAs. Genetic variation in this structure is likely to affect binding of Rev protein and ultimately overall gene expression and replication. We characterized RRE sequences from 13 HIV-1 infected individuals from North India which also included two mother-child pairs following vertical transmission. We observed high degree of conservation of sequences, including the 9-nt (CACUAUGGG) long sequence in stem-loop B, required for efficient binding of Rev protein. All of our 13 RRE sequences possessed G to A (position 66) mutation located in the critical branched-stem-loop B which is not present in consensus C or B sequence. We derived a consensus RRE structure which showed interesting changes in the stem-loop structures including the stem-loop B. Mother-Child RRE sequences showed conservation of unique polymorphisms as well as some new mutations in child RRE sequences. Despite these changes, the ability to form multiple essential stem-loop structures required for Rev binding was conserved. RRE RNA derived from one of the samples, VT5, retained the ability to bind Rev protein under in vitro conditions although it showed alternate secondary structure. This is the first study from India describing the structural and possible functional implications due to very unique RRE sequence heterogeneity and its possible role in vertical transmission and gene expression.
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Neogi U, Sood V, Banerjee S, Ghosh N, Verma S, Samrat S, Sharma Y, Saxena A, Husain S, Ramachandran VG, Das S, Sreedhar KV, Goel N, Wanchu A, Banerjea AC. Global HIV-1 molecular epidemiology with special reference to genetic analysis of HIV-1 subtypes circulating in North India: functional and pathogenic implications of genetic variation. Indian J Exp Biol 2009; 47:424-431. [PMID: 19634706] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
HIV-1 displays extensive genetic diversity globally which poses challenge in designing a suitable antigen/immunogen to provoke desired protective immune response in host. HIV-1 mediated pathogenesis is complex and involves host genes, virus genes and other factors. A number of genetic subtypes have been identified based on sequence variations, largely in envelope region. Different genetic subtypes display variation in amino acid sequences with increasing incidence of subtype B, C, D and mosaic recombinants in India. They can potentially alter the functions of several proteins like Rev, Tat ,Vpr, Vif etc and thereby, influence HIV-1 mediated pathogenesis. Recent study has shown that LTR promoter region exhibits novel mosaic structures with segments from B/C Myanmar and India. This indicates rapid evolving nature of HIV-1 and causing epidemics due to existence of multiple subtypes in Indian region. These multiple subtypes show significant differences in various functions (gene activation, cell cycle arrest, RNA binding activities) compared to prototype subtype B genes. These differences may help in better understanding of unique features of HIV-1 epidemic in India.
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Affiliation(s)
- Ujjwal Neogi
- Laboratory of Virology II, National Institute of Immunology, New Delhi 110 067, India
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Ahmed G, Sharma Y, Ahuja B. Electronic properties of PbCl2 and PbBr2 using Compton scattering technique. Appl Radiat Isot 2009; 67:1050-6. [DOI: 10.1016/j.apradiso.2009.01.083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2008] [Accepted: 01/27/2009] [Indexed: 11/25/2022]
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Mukhopadhyay C, Chawla K, Sharma Y, Bairy I. Emerging extra-intestinal infections with Aeromonas hydrophila in coastal region of southern Karnataka. J Postgrad Med 2009; 54:199-202. [PMID: 18626167 DOI: 10.4103/0022-3859.41801] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Aeromonas species are gram-negative rods usually isolated from the gastrointestinal tract. They have been occasionally reported as a cause of extra-intestinal infections such as cellulitis, cholangitis, necrotizing fascitis, meningitis, bacteremia, or peritonitis in both immunocompetent and immunocompromised patients. AIM To determine the role and possible pathogenesis of Aeromonas in extra-intestinal infections. SETTINGS AND DESIGN Retrospective analysis carried out at Kasturba Hospital Manipal, Karnataka in the months of January and February 2007. MATERIALS AND METHODS Clinical manifestations and management of eight cases of extra-intestinal infections caused by A. hydrophila , from the south Karnataka coastal region were reviewed. The isolates were identified with the help of biochemical tests using standard guidelines. RESULTS All patients acquired Aeromonas infections in the community. Five (62.5%) had underlying illnesses, such as liver disease, diabetes mellitus or malignancy. Five (62.5%) had polymicrobial infections, and three (37.5%) were complicated with bacteremia. These included three patients with ulcers or abscess over the lower leg, two with cellulitis due to snake bite and one each with pelvic inflammatory disease, spontaneous bacterial peritonitis and pneumonia. A. hydrophila was found to be a causative agent of pelvic inflammatory disease or cellulitis following sea snake bite, and such a clinical scenario has not been previously described. Seven patients survived the illness. CONCLUSIONS Isolation of A. hydrophila from extra-intestinal specimens demands utmost clinical and microbiological vigilance in diagnosis, since the organism can cause serious infections among immunocompromised as well as immunocompetent individuals.
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Affiliation(s)
- C Mukhopadhyay
- Department of Microbiology, Kasturba Medical College, Manipal - 576 104, Karnataka, India.
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Sharma A, Paliwal P, Dadhwal V, Sharma Y, Deka D. Rare finding of 2n/4n mixoploidy in mother and fetus with severe immune hydrops. Cytogenet Genome Res 2009; 124:90-3. [DOI: 10.1159/000200092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/18/2008] [Indexed: 11/19/2022] Open
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Gupta N, Bano AS, Sharma Y, Banerjea AC. Potent Knockdown of the X RNA of Hepatitis B by a Novel Chimeric siRNA-Ribozyme Construct and Modulation of Intracellular Target RNA by Selectively Disabled Mutants. Oligonucleotides 2008; 18:225-33. [DOI: 10.1089/oli.2008.0134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Nidhi Gupta
- National Institute of Immunology, Jawaharlal Nehru University Campus, New Delhi, India
| | - Aalia S. Bano
- National Institute of Immunology, Jawaharlal Nehru University Campus, New Delhi, India
| | - Yogeshwar Sharma
- National Institute of Immunology, Jawaharlal Nehru University Campus, New Delhi, India
| | - Akhil C. Banerjea
- National Institute of Immunology, Jawaharlal Nehru University Campus, New Delhi, India
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