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https://www.readbyqxmd.com/read/28530656/metabolic-anticipation-in-mycobacterium-tuberculosis
#1
Hyungjin Eoh, Zhe Wang, Emilie Layre, Poonam Rath, Roxanne Morris, D Branch Moody, Kyu Y Rhee
Humans serve as both host and reservoir for Mycobacterium tuberculosis, making tuberculosis a theoretically eradicable disease. How M. tuberculosis alternates between host-imposed quiescence and sporadic bouts of replication to complete its life cycle, however, remains unknown. Here, we identify a metabolic adaptation that is triggered upon entry into hypoxia-induced quiescence but facilitates subsequent cell cycle re-entry. Catabolic remodelling of the cell surface trehalose mycolates of M. tuberculosis specifically generates metabolic intermediates reserved for re-initiation of peptidoglycan biosynthesis...
May 22, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28517109/the-studies-of-para-and-parb-dynamics-reveal-asymmetry-of-chromosome-segregation-in-mycobacteria
#2
Katarzyna Ginda, Isabella Santi, Djenet Bousbaine, Jolanta Zakrzewska-Czerwińska, Dagmara Jakimowicz, John McKinney
Active segregation of bacterial chromosomes usually involves the action of ParB proteins, which bind in proximity of chromosomal origin (oriC) regions forming nucleoprotein complexes - segrosomes. Newly duplicated segrosomes are moved either uni- or bidirectionally by the action of ATPases - ParA proteins. In Mycobacterium smegmatis the oriC region is located in an off-centred position and newly replicated segrosomes are segregated toward cell poles. The elimination of M. smegmatis ParA and/or ParB leads to chromosome segregation defects...
May 18, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28410600/primary-adrenal-non-hodgkin-lymphoma-a-case-report-and-review-of-the-literature
#3
Nanik Ram, Owais Rashid, Saad Farooq, Imran Ulhaq, Najmul Islam
BACKGROUND: Lymphomas are cancers that arise from the white blood cells and have been traditionally divided into two large subtypes: Hodgkin and non-Hodgkin lymphoma. B-cell lymphoma is the most common subtype of non-Hodgkin lymphoma; almost 85% of patients with lymphoma have this variant. Lymphomas can potentially arise from any lymphoid tissue located in the body; however, primary adrenal non-Hodgkin lymphoma is extremely rare. We report the history, examination findings, and laboratory results of a 50-year-old man diagnosed with a primary left adrenal diffuse large B-cell lymphoma...
April 15, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28361736/dna-replication-in-mycobacterium-tuberculosis
#4
Zanele Ditse, Meindert H Lamers, Digby F Warner
Faithful replication and maintenance of the genome are essential to the ability of any organism to survive and propagate. For an obligate pathogen such as Mycobacterium tuberculosis that has to complete successive cycles of transmission, infection, and disease in order to retain a foothold in the human population, this requires that genome replication and maintenance must be accomplished under the metabolic, immune, and antibiotic stresses encountered during passage through variable host environments. Comparative genomic analyses have established that chromosomal mutations enable M...
March 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28335738/genome-wide-expression-profiling-establishes-novel-modulatory-roles-of-vitamin-c-in-thp-1-human-monocytic-cell-line
#5
Sakshi Dhingra Batra, Malobi Nandi, Kriti Sikri, Jaya Sivaswami Tyagi
BACKGROUND: Vitamin C (vit C) is an essential dietary nutrient, which is a potent antioxidant, a free radical scavenger and functions as a cofactor in many enzymatic reactions. Vit C is also considered to enhance the immune effector function of macrophages, which are regarded to be the first line of defence in response to any pathogen. The THP-1 cell line is widely used for studying macrophage functions and for analyzing host cell-pathogen interactions. RESULTS: We performed a genome-wide temporal gene expression and functional enrichment analysis of THP-1 cells treated with 100 μM of vit C, a physiologically relevant concentration of the vitamin...
March 23, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28306498/elevation-of-fumarate-levels-compromise-redox-control-and-viability-in-mycobacterium-tuberculosis
#6
Yong-Mo Ahn, Helena I Boshoff
In this issue of Cell Chemical Biology, Ruecker et al. (2017) show that fumarase depletion in Mycobacterium tuberculosis leads to fumarate, a TCA cycle intermediate, accumulation, causing succination of a range of thiol-containing metabolites and proteins. Fumarate is bactericidal to the pathogen, and its accumulation may enhance the bactericidal effector mechanisms of other TCA cycle intermediates that accumulate due to activation of infected macrophages.
March 16, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28282487/establishment-of-multiplex-solid-phase-strip-pcr-test-for-detection-of-24-ocular-infectious-disease-pathogens
#7
Satoko Nakano, Sunao Sugita, Yasuhiro Tomaru, Ayumi Hono, Takako Nakamuro, Toshiaki Kubota, Hiroshi Takase, Manabu Mochizuki, Masayo Takahashi, Norio Shimizu
Purpose: To establish and evaluate a new multiplex solid-phase strip polymerase chain reaction (strip PCR) for concurrent detection of common ocular infectious disease pathogens. Methods: A new multiplex strip PCR was established to detect 24 common ocular infectious disease pathogens: herpes simplex virus (HSV) 1, HSV2, varicella-zoster virus (VZV), Epstein-Barr virus (EBV), cytomegalovirus (CMV), human herpes virus (HHV) 6, HHV7, HHV8, human T-cell lymphotropic virus (HTLV)-1, adenovirus, Mycobacterium tuberculosis, Treponema pallidum, Propionibacterium acnes (P...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28250431/novel-protein-acetyltransferase-rv2170-modulates-carbon-and-energy-metabolism-in-mycobacterium-tuberculosis
#8
Wonsik Lee, Brian C VanderVen, Suzanne Walker, David G Russell
Recent data indicate that the metabolism of Mycobacterium tuberculosis (Mtb) inside its host cell is heavily dependent on cholesterol and fatty acids. Mtb exhibits a unique capacity to co-metabolize different carbon sources and the products from these substrates are compartmentalized metabolically. Isocitrate lies at one of the key nodes of carbon metabolism and can feed into either the glyoxylate shunt (via isocitrate lyase) or the TCA cycle (via isocitrate dehydrogenase (ICDH) activity) and we sought to better understand the regulation at this junction...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/27959952/experimental-evolution-of-mycobacterium-tuberculosis-in-human-macrophages-results-in-low-frequency-mutations-not-associated-with-selective-advantage
#9
Valentina Guerrini, Selvakumar Subbian, Pierre Santucci, Stéphane Canaan, Maria Laura Gennaro, Gianni Pozzi
Isolates of the human pathogen Mycobacterium tuberculosis recovered from clinical samples exhibit genetic heterogeneity. Such variation may result from the stressful environment encountered by the pathogen inside the macrophage, which is the host cell tubercle bacilli parasitize. To study the evolution of the M. tuberculosis genome during growth inside macrophages, we developed a model of intracellular culture in which bacteria were serially passaged in macrophage-like THP-1 cells for about 80 bacterial generations...
2016: PloS One
https://www.readbyqxmd.com/read/27890013/in-silico-characterization-of-a-hypothetical-protein-rv1288-of-mycobacterium-tuberculosis-containing-an-esterase-signature-and-an-uncommon-lyte-domain
#10
Arbind Kumar, Pratibha Maan, Gurpreet Singh, Jagdeep Kaur
BACKGROUND: Death toll due to tuberculosis is still rising day by day. Whole genome sequence of Mycobacterium tuberculosis has provided a platform to conduct research in order to identify the probable drug target. OBJECTIVES: Out of 4000 gene products of M. tuberculosis, approximately 40% of proteins are annotated as hypothetical. Identifying and characterizing these proteins could provide a new prescriptive for developing new TB drugs. Rv1288, a protein of M. tuberculosis H37Rv has been annotated as a hypothetical protein in database...
November 24, 2016: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/27865403/propidium-monoazide-and-xpert-mtb-rif-to-quantify-mycobacterium-tuberculosis-cells
#11
Xavier A Kayigire, Sven O Friedrich, Miriam N Karinja, Lize van der Merwe, Neil A Martinson, Andreas H Diacon
Propidium monoazide (PMA) penetrates non-viable cells with compromised membranes. PMA has been proposed to improve the specificity of Xpert MTB/RIF (Xpert) for the detection of viable Mycobacterium tuberculosis. This study assessed the effect of PMA on Xpert cycle thresholds (CT) of M. tuberculosis made non-viable under antibiotic pressure. In vitro, we measured the difference between CT with and without PMA (ΔCT) in liquid cultures treated with one of six anti-tuberculosis drugs (isoniazid, rifampin, pyrazinamide, ethambutol, streptomycin, moxifloxacin) and found significant ΔCT only with isoniazid and ethambutol for pan-susceptible M...
December 2016: Tuberculosis
https://www.readbyqxmd.com/read/27774438/experimental-models-of-foamy-macrophages-and-approaches-for-dissecting-the-mechanisms-of-lipid-accumulation-and-consumption-during-dormancy-and-reactivation-of-tuberculosis
#12
Pierre Santucci, Feriel Bouzid, Nabil Smichi, Isabelle Poncin, Laurent Kremer, Chantal De Chastellier, Michel Drancourt, Stéphane Canaan
Despite a slight decline since 2014, tuberculosis (TB) remains the major deadly infectious disease worldwide with about 1.5 million deaths each year and with about one-third of the population being latently infected with Mycobacterium tuberculosis, the etiologic agent of TB. During primo-infection, the recruitment of immune cells leads to the formation of highly organized granulomas. Among the different cells, one outstanding subpopulation is the foamy macrophage (FM), characterized by the abundance of triacylglycerol-rich lipid bodies (LB)...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27624090/rewiring-cellular-metabolism-via-the-akt-mtor-pathway-contributes-to-host-defence-against-mycobacterium-tuberculosis-in-human-and-murine-cells
#13
Ekta Lachmandas, Macarena Beigier-Bompadre, Shih-Chin Cheng, Vinod Kumar, Arjan van Laarhoven, Xinhui Wang, Anne Ammerdorffer, Lily Boutens, Dirk de Jong, Thirumala-Devi Kanneganti, Mark S Gresnigt, Tom H M Ottenhoff, Leo A B Joosten, Rinke Stienstra, Cisca Wijmenga, Stefan H E Kaufmann, Reinout van Crevel, Mihai G Netea
Cells in homeostasis metabolize glucose mainly through the tricarboxylic acid cycle and oxidative phosphorylation, while activated cells switch their basal metabolism to aerobic glycolysis. In this study, we examined whether metabolic reprogramming toward aerobic glycolysis is important for the host response to Mycobacterium tuberculosis (Mtb). Through transcriptional and metabolite analysis we show that Mtb induces a switch in host cellular metabolism toward aerobic glycolysis in human peripheral blood mononuclear cells (PBMCs)...
November 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27456231/convergence-of-a-diabetes-mellitus-protein-energy-malnutrition-and-tb-epidemic-the-neglected-elderly-population
#14
REVIEW
Sonia Menon, Rodolfo Rossi, Leon Nshimyumukiza, Aibibula Wusiman, Natasha Zdraveska, Manal Shams Eldin
BACKGROUND: On a global scale, nearly two billion persons are infected with Mycobacterium tuberculosis. From this vast reservoir of latent tuberculosis (TB) infection, a substantial number will develop active TB during their lifetime, with some being able to transmit TB or Multi-drug- resistant (MDR) TB to others. There is clinical evidence pointing to a higher prevalence of infectious diseases including TB among individuals with Diabetes Mellitus (DM). Furthermore, ageing and diabetes mellitus may further aggravate protein-energy malnutrition (PEM), which in turn impairs T-lymphocyte mediated immunologic defenses, thereby increasing the risk of developing active TB and compromising TB treatment...
July 26, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27411553/homology-modeling-substrate-docking-and-molecular-simulation-studies-of-mycobacteriophage-che12-lysin-a
#15
Shainaba A Saadhali, Sameer Hassan, Luke Elizabeth Hanna, Uma Devi Ranganathan, Vanaja Kumar
Mycobacteriophages produce lysins that break down the host cell wall at the end of lytic cycle to release their progenies. The ability to lyse mycobacterial cells makes the lysins significant. Mycobacteriophage Che12 is the first reported temperate phage capable of infecting and lysogenising Mycobacterium tuberculosis. Gp11 of Che12 was found to have Chitinase domain that serves as endolysin (lysin A) for Che12. Structure of gp11 was modeled and evaluated using Ramachandran plot in which 98 % of the residues are in the favored and allowed regions...
August 2016: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/27365187/activation-of-type-ii-nadh-dehydrogenase-by-quinolinequinones-mediates-antitubercular-cell-death
#16
Adam Heikal, Kiel Hards, Chen-Yi Cheung, Ayana Menorca, Mattie S M Timmer, Bridget L Stocker, Gregory M Cook
OBJECTIVES: Quinolinequinones (QQ) have been shown to inhibit the growth of mycobacterial species, but their mode(s) of action and molecular target(s) remain unknown. To facilitate further development of QQ as antimycobacterial drugs, we investigated the molecular mechanism and target of QQ in mycobacteria. METHODS: Cell viability of Mycobacterium tuberculosis and Mycobacterium bovis bacillus Calmette-Guérin was determined in the presence of QQ8c, a representative QQ compound, and isoniazid, a frontline antitubercular drug...
October 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27263784/development-tuberculous-meningitis-during-chemotherapy-for-cd5-positive-diffuse-large-b-cell-lymphoma
#17
Yuki Teramura, Kazuaki Kameda, Junya Kanda, Ayumi Gomyo, Jin Hayakawa, Yu Akahoshi, Yusuke Komiya, Naonori Harada, Tomotaka Ugai, Yuko Ishihara, Koji Kawamura, Kana Sakamoto, Miki Sato, Hidenori Wada, Kiriko Terasako-Saito, Shun-Ichi Kimura, Misato Kikuchi, Hideki Nakasone, Shinichi Kako, Yoshinobu Kanda
The patient was a 62-year-old woman with CD5(+) diffuse large B-cell lymphoma. Treatment with the R-CHOP regimen (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisolone) was started. On the eleventh day of the third cycle, headache and low grade fever developed. Her consciousness gradually deteriorated. Seven days after symptom onset, she was brought to the emergency department of our hospital. Cerebrospinal fluid (CSF) analysis revealed a white blood cell count of 25/μl, and a protein level of 188 mg/dl...
May 2016: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/27227307/the-role-of-biotin-in-bacterial-physiology-and-virulence-a-novel-antibiotic-target-for-mycobacterium-tuberculosis
#18
Wanisa Salaemae, Grant W Booker, Steven W Polyak
Biotin is an essential cofactor for enzymes present in key metabolic pathways such as fatty acid biosynthesis, replenishment of the tricarboxylic acid cycle, and amino acid metabolism. Biotin is synthesized de novo in microorganisms, plants, and fungi, but this metabolic activity is absent in mammals, making biotin biosynthesis an attractive target for antibiotic discovery. In particular, biotin biosynthesis plays important metabolic roles as the sole source of biotin in all stages of the Mycobacterium tuberculosis life cycle due to the lack of a transporter for scavenging exogenous biotin...
April 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27090254/32nd-international-austrian-winter-symposium-zell-am-see-the-netherlands-20-23-january-2016
#19
W Langsteger, A Rezaee, W Loidl, H S Geinitz, F Fitz, M Steinmair, G Broinger, L Pallwien-Prettner, M Beheshti, L Imamovic, M Beheshti, G Rendl, D Hackl, O Tsybrovsky, M Steinmair, K Emmanuel, F Moinfar, C Pirich, W Langsteger, A Bytyqi, G Karanikas, M Mayerhöfer, O Koperek, B Niederle, M Hartenbach, T Beyer, K Herrmann, J Czernin, I Rausch, P Rust, M D DiFranco, M Lassen, A Stadlbauer, M E Mayerhöfer, M Hartenbach, M Hacker, T Beyer, K Binzel, R Magnussen, W Wei, M U Knopp, D C Flanigan, C Kaeding, M V Knopp, A Leisser, M Nejabat, M Hartenbach, G Kramer, M Krainer, M Hacker, A Haug, Wencke Lehnert, Karl Schmidt, Sharok Kimiaei, Marcus Bronzel, Andreas Kluge, C L Wright, K Binzel, J Zhang, Evan Wuthrick, Piotr Maniawski, M V Knopp, M Blaickner, E Rados, A Huber, M Dulovits, H Kulkarni, S Wiessalla, C Schuchardt, R P Baum, B Knäusl, D Georg, M Bauer, B Wulkersdorfer, W Wadsak, C Philippe, H Haslacher, M Zeitlinger, O Langer, M Bauer, M Feldmann, R Karch, W Wadsak, M Zeitlinger, M J Koepp, M-C Asselin, E Pataraia, O Langer, M Zeilinger, C Philippe, M Dumanic, F Pichler, J Pilz, M Hacker, W Wadsak, M Mitterhauser, L Nics, B Steiner, M Hacker, M Mitterhauser, W Wadsak, A Traxl, Thomas Wanek, Kushtrim Kryeziu, Severin Mairinger, Johann Stanek, Walter Berger, Claudia Kuntner, Oliver Langer, S Mairinger, T Wanek, A Traxl, M Krohn, J Stanek, T Filip, M Sauberer, C Kuntner, J Pahnke, O Langer, D Svatunek, C Denk, M Wilkovitsch, T Wanek, T Filip, C Kuntner-Hannes, J Fröhlich, H Mikula, C Denk, D Svatunek, T Wanek, S Mairinger, J Stanek, T Filip, J Fröhlich, H Mikula, C Kuntner-Hannes, T Balber, J Singer, J Fazekas, C Rami-Mark, N Berroterán-Infante, E Jensen-Jarolim, W Wadsak, M Hacker, H Viernstein, M Mitterhauser, C Denk, D Svatunek, B Sohr, H Mikula, J Fröhlich, T Wanek, C Kuntner-Hannes, T Filip, S Pfaff, C Philippe, M Mitterhauser, M Hartenbach, M Hacker, W Wadsak, T Wanek, E Halilbasic, M Visentin, S Mairinger, B Stieger, C Kuntner, M Trauner, O Langer, P Lam, M Aistleitner, R Eichinger, C Artner, H Eidherr, C Vraka, A Haug, M Mitterhauser, L Nics, M Hartenbach, M Hacker, W Wadsak, H Kvaternik, R Müller, D Hausberger, C Zink, R M Aigner, U Cossío, M Asensio, A Montes, S Akhtar, Y Te Welscher, R van Nostrum, V Gómez-Vallejo, J Llop, F VandeVyver, T Barclay, N Lippens, M Troch, L Hehenwarter, B Egger, J Holzmannhofer, M Rodrigues-Radischat, C Pirich, N Pötsch, I Rausch, D Wilhelm, M Weber, J Furtner, G Karanikas, A Wöhrer, M Mitterhauser, M Hacker, T Traub-Weidinger, T Cassou-Mounat, S Balogova, V Nataf, M Calzada, V Huchet, K Kerrou, J-Y Devaux, M Mohty, L Garderet, J-N Talbot, S Stanzel, G Pregartner, T Schwarz, V Bjelic-Radisic, B Liegl-Atzwanger, R Aigner, S Stanzel, F Quehenberger, R M Aigner, A Koljević Marković, Milica Janković, V Miler Jerković, M Paskaš, G Pupić, R Džodić, D Popović, M C Fornito, D Familiari, P Koranda, H Polzerová, I Metelková, L Henzlová, R Formánek, E Buriánková, M Kamínek, W H Thomson, C Lewis, W H Thomson, J O'Brien, G James, A Notghi, H Huber, I Stelzmüller, R Wunn, M Mandl, F Fellner, B Lamprecht, M Gabriel, M C Fornito, G Leonardi, W H Thomson, J O'Brien, G James, J Hudzietzová, J Sabol, M Fülöp
A1 68Ga-PSMA PET/CT in staging and restaging of Prostate Cancer Patients: comparative study with 18F-Choline PET/CTW Langsteger, A Rezaee, W Loidl, HS Geinitz, F Fitz, M Steinmair, G Broinger, L Pallwien-Prettner, M BeheshtiA2 F18 Choline PET - CT: an accurate diagnostic tool for the detection of parathyroid adenoma?L Imamovic, M Beheshti, G Rendl, D Hackl, O Tsybrovsky, M Steinmair, K Emmanuel, F Moinfar, C Pirich, W LangstegerA3 [18F]Fluoro-DOPA-PET/CT in the primary diagnosis of medullary thyroid carcinomaA Bytyqi, G Karanikas, M Mayerhöfer, O Koperek, B Niederle, M HartenbachA4 Variations of clinical PET/MR operations: An international survey on the clinical utilization of PET/MRIT Beyer, K Herrmann, J CzerninA5 Standard Dixon-based attenuation correction in combined PET/MRI: Reproducibility and the possibility of Lean body mass estimationI Rausch, P Rust, MD DiFranco, M Lassen, A Stadlbauer, ME Mayerhöfer, M Hartenbach, M Hacker, T BeyerA6 High resolution digital FDG PET/MRI imaging for assessment of ACL graft viabilityK Binzel, R Magnussen, W Wei, MU Knopp, DC Flanigan, C Kaeding, MV KnoppA7 Using pre-existing hematotoxicity as predictor for severe side effects and number of treatment cycles of Xofigo therapyA Leisser, M Nejabat, M Hartenbach, G Kramer, M Krainer, M Hacker, A HaugA8 QDOSE - comprehensive software solution for internal dose assessmentWencke Lehnert, Karl Schmidt, Sharok Kimiaei, Marcus Bronzel, Andreas KlugeA9 Clinical impact of Time-of-Flight on next-generation digital PET imaging of Yttrium-90 radioactivity following liver radioembolizationCL Wright, K Binzel, J Zhang, Evan Wuthrick, Piotr Maniawski, MV KnoppA10 Snakes in patients! Lessons learned from programming active contours for automated organ segmentationM Blaickner, E Rados, A Huber, M Dulovits, H Kulkarni, S Wiessalla, C Schuchardt, RP Baum, B Knäusl, D GeorgA11 Influence of a genetic polymorphism on brain uptake of the dual ABCB1/ABCG2 substrate [11C]tariquidarM Bauer, B Wulkersdorfer, W Wadsak, C Philippe, H Haslacher, M Zeitlinger, O LangerA12 Outcome prediction of temporal lobe epilepsy surgery from P-glycoprotein activity...
April 2016: EJNMMI Research
https://www.readbyqxmd.com/read/27027307/comparative-proteomics-identifies-host-immune-system-proteins-affected-by-infection-with-mycobacterium-bovis
#20
Vladimir López, Margarita Villar, João Queirós, Joaquín Vicente, Lourdes Mateos-Hernández, Iratxe Díez-Delgado, Marinela Contreras, Paulo C Alves, Pilar Alberdi, Christian Gortázar, José de la Fuente
Mycobacteria of the Mycobacterium tuberculosis complex (MTBC) greatly impact human and animal health worldwide. The mycobacterial life cycle is complex, and the mechanisms resulting in pathogen infection and survival in host cells are not fully understood. Eurasian wild boar (Sus scrofa) are natural reservoir hosts for MTBC and a model for mycobacterial infection and tuberculosis (TB). In the wild boar TB model, mycobacterial infection affects the expression of innate and adaptive immune response genes in mandibular lymph nodes and oropharyngeal tonsils, and biomarkers have been proposed as correlates with resistance to natural infection...
March 2016: PLoS Neglected Tropical Diseases
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