keyword
MENU ▼
Read by QxMD icon Read
search

m.tb

keyword
https://www.readbyqxmd.com/read/28646656/azide-alkyne-cycloaddition-towards-1h-1-2-3-triazole-tethered-gatifloxacin-and-isatin-conjugates-design-synthesis-and-in%C3%A2-vitro-anti-mycobacterial-evaluation
#1
Zhi Xu, Xu-Feng Song, Yuan-Qiang Hu, Min Qiang, Zao-Sheng Lv
Twelve novel 1H-1,2,3-triazole-tethered gatifloxacin (GTFX) isatin conjugates 5a-l with greater lipophilicity compared with GTFX were designed, synthesized and evaluated for their in vitro anti-mycobacterial activities against M. tuberculosis (MTB) H37Rv and MDR-TB as well as cytotoxicity. The preliminary results showed that all the targets (MIC: 0.10-8 μg/mL) exhibited excellent inhibitory activity against MTB H37Rv and MDR-TB, but eight of them (CC50: 7.8-62.5 μg/mL) were much more toxic than the parent GTFX (CC50: 125 μg/mL)...
June 9, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28646425/hydroxylamine-induced-oxidation-of-ferrous-carbonylated-truncated-hemoglobins-from-mycobacterium-tuberculosis-and-campylobacter-jejuni-is-limited-by-carbon-monoxide-dissociation
#2
Paolo Ascenzi, Chiara Ciaccio, Tecla Gasperi, Alessandra Pesce, Lucia Caporaso, Massimo Coletta
Hydroxylamine (HA) is an oxidant of ferrous globins and its action has been reported to be inhibited by CO, even though this mechanism has not been clarified. Here, kinetics of the HA-mediated oxidation of ferrous carbonylated Mycobacterium tuberculosis truncated hemoglobin N and O (Mt-trHbN(II)-CO and Mt-trHbO(II)-CO, respectively) and Campylobacter jejuni truncated hemoglobin P (Cj-trHbP(II)-CO), at pH 7.2 and 20.0 °C, are reported. Mixing Mt-trHbN(II)-CO, Mt-trHbO(II)-CO, and Cj-trHbP(II)-CO solution with the HA solution brings about absorption spectral changes reflecting the disappearance of the ferrous carbonylated derivatives with the concomitant formation of the ferric species...
June 23, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28646324/expression-purification-and-characterization-of-gmz2-10c-a-complex-disulphide-bonded-fusion-protein-vaccine-candidate-against-the-asexual-and-sexual-life-stages-of-the-malaria-causing-plasmodium-falciparum-parasite
#3
Ulrik H Mistarz, Susheel K Singh, Tam T T N Nguyen, Will Roeffen, Fen Yang, Casper Lissau, Søren M Madsen, Astrid Vrang, Régis W Tiendrebeogo, Ikhlaq H Kana, Robert W Sauerwein, Michael Theisen, Kasper D Rand
PURPOSE: Production and characterization of a chimeric fusion protein (GMZ2'.10C) which combines epitopes of key malaria parasite antigens: glutamate-rich protein (GLURP), merozoite surface protein 3 (MSP3), and the highly disulphide bonded Pfs48/45 (10C). GMZ2'.10C is a potential candidate for a multi-stage malaria vaccine that targets both transmission and asexual life-cycle stages of the parasite. METHODS: GMZ2'.10C was produced in Lactococcus lactis and purified using either an immunoaffinity purification (IP) or a conventional purification (CP) method...
June 23, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28646039/monocyte-adhesion-migration-and-extracellular-matrix-breakdown-is-regulated-by-integrin-%C3%AE-v%C3%AE-3-in-mycobacterium-tuberculosis-infection
#4
Sara Brilha, Riccardo Wysoczanski, Ashley M Whittington, Jon S Friedland, Joanna C Porter
In tuberculosis (TB), the innate inflammatory immune response drives tissue destruction, morbidity, and mortality. Monocytes secrete matrix metalloproteinases (MMPs), which have key roles in local tissue destruction and cavitation. We hypothesized that integrin signaling might regulate monocyte MMP secretion in pulmonary TB during cell adhesion to the extracellular matrix (ECM). Adhesion to type I collagen and fibronectin by Mycobacterium tuberculosis-stimulated monocytes increased MMP-1 gene expression by 2...
June 23, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28642848/mycobacterium-tuberculosis-glyceraldehyde-3-phosphate-dehydrogenase-gapdh-functions-as-a-receptor-for-human-lactoferrin
#5
Himanshu Malhotra, Anil Patidar, Vishant M Boradia, Rajender Kumar, Rakesh D Nimbalkar, Ajay Kumar, Zahid Gani, Rajbeer Kaur, Prabha Garg, Manoj Raje, Chaaya I Raje
Iron is crucial for the survival of living cells, particularly the human pathogen Mycobacterium tuberculosis (M.tb) which uses multiple strategies to acquire and store iron. M.tb synthesizes high affinity iron chelators (siderophores), these extract iron from host iron carrier proteins such as transferrin (Tf) and lactoferrin (Lf). Recent studies have revealed that M.tb may also relocate several housekeeping proteins to the cell surface for capture and internalization of host iron carrier protein transferrin...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28642844/role-of-bacterioferritin-ferritin-in-m-tuberculosis-pathogenesis-and-drug-resistance-a-future-perspective-by-interactomic-approach
#6
Divakar Sharma, Deepa Bisht
Tuberculosis is caused by Mycobacterium tuberculosis, one of the most successful and deadliest human pathogen. Aminoglycosides resistance leads to emergence of extremely drug resistant strains of M. tuberculosis. Iron is crucial for the biological functions of the cells. Iron assimilation, storage and their utilization is not only involved in pathogenesis but also in emergence of drug resistance strains. We previously reported that iron storing proteins (bacterioferritin and ferritin) were found to be overexpressed in aminoglycosides resistant isolates...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28642843/the-impact-of-genome-region-of-difference-4-rd4-on-mycobacterial-virulence-and-bcg-efficacy
#7
Huanwei Ru, Xiaojia Liu, Chen Lin, Jingyan Yang, Fuzeng Chen, Ruifeng Sun, Lu Zhang, Jun Liu
Comparative genome analyses have revealed a number of regions of difference (RD) among mycobacterial species. The functional consequences of most of these genome variations have not been studied. RD4, which encompasses Rv1506c-Rv1516c of Mycobacterium tuberculosis (M. tb) H37Rv, is absent in the closely related Mycobacterium bovis and M. bovis Bacille Calmette-Guérin (BCG). On the other hand, we previously found that Mycobacterium marinum has an extended RD4 which includes a number of genes involved in the biosynthesis of lipooligosaccharides (LOSs)...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28642013/identifying-mechanisms-driving-formation-of-granuloma-associated-fibrosis-during-mycobacterium-tuberculosis-infection
#8
Hayley C Warsinske, Robert M DiFazio, Jennifer J Linderman, JoAnne L Flynn, Denise E Kirschner
Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), is a pulmonary pathogen of major global concern. A key feature of Mtb infection in primates is the formation of granulomas, dense cellular structures surrounding infected lung tissue. These structures serve as the main site of host-pathogen interaction in TB, and thus to effectively treat TB we must clarify mechanisms of granuloma formation and their function in disease. Fibrotic granulomas are associated with both good and bad disease outcomes...
June 19, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28641948/optimally-capturing-latency-dynamics-in-models-of-tuberculosis-transmission
#9
Romain Ragonnet, James M Trauer, Nick Scott, Michael T Meehan, Justin T Denholm, Emma S McBryde
Although different structures are used in modern tuberculosis (TB) models to simulate TB latency, it remains unclear whether they are all capable of reproducing the particular activation dynamics empirically observed. We aimed to determine which of these structures replicate the dynamics of progression accurately. We reviewed 88 TB-modelling articles and classified them according to the latency structure employed. We then fitted these different models to the activation dynamics observed from 1352 infected contacts diagnosed in Victoria (Australia) and Amsterdam (Netherlands) to obtain parameter estimates...
June 16, 2017: Epidemics
https://www.readbyqxmd.com/read/28641558/bis-2-aminoimidazolines-and-bisguanidines-synthetic-approaches-antiparasitic-activity-and-dna-binding-properties
#10
Christophe Dardonville, J Jonathan Nué Martínez
BACKGROUND: Parasitic diseases caused by protozoan parasites of the genus Trypanosoma and Plasmodium cause some of the deadliest and disabling human infections in tropical and subtropical areas. Diphenyl-based bis(2-phenylimino)imidazolidines and bisguanidines are extremely potent antiparasitic agents against Trypanosoma brucei (etiological agent of African trypanosomiasis) and Plasmodium falciparum (etiological agent of severe malaria). Many of these compounds are also curative in mouse models of stage 1 African trypanosomiasis representing promising leads for the development of antitrypanosomal drugs...
June 22, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28641050/thrifty-females-frisky-males-winter-energetics-of-hibernating-bats-from-a-cold-climate
#11
Zenon J Czenze, Kristin A Jonasson, Craig K R Willis
Mammalian hibernation consists of energy-saving torpor bouts (periods of controlled reduction in body temperature [Tb]) interspersed with brief arousals to normothermic Tb. Frequency and duration of torpor bouts and arousals can affect winter survival and are thought to be influenced by an optimization balancing the energetic benefits of prolonged torpor against the physiological and ecological costs (e.g., accumulation of metabolic wastes). Female little brown bats (Myotis lucifugus) spend their fat reserves more slowly than males during winter, presumably so they can emerge from hibernation in good condition to initiate pregnancy...
July 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28638616/vitamin-d-deficiency-among-newly-diagnosed-tuberculosis-patients-and-their-household-contacts-a-comparative-cross-sectional-study
#12
Meseret Workineh, Biniam Mathewos, Beyene Moges, Adissu Gize, Sisay Getie, Olle Stendahl, Thomas Schon, Ebba Abate
BACKGROUND: Recent studies suggest that the incidence and severity of tuberculosis is associated with low levels of vitamin D. Even though individuals living in Ethiopia have a high exposure to sunlight which is a source of vitamin D, tuberculosis is still one of the major causes of morbidity and mortality in the country. Therefore, this study aimed to determine the prevalence and associated factors of vitamin D deficiency in newly diagnosed tuberculosis patients, household contacts and community controls in Gondar, Ethiopia...
2017: Archives of Public Health, Archives Belges de Santé Publique
https://www.readbyqxmd.com/read/28636635/microrna-144-3p-inhibits-autophagy-activation-and-enhances-bacillus-calmette-gu%C3%A3-rin-infection-by-targeting-atg4a-in-raw264-7-macrophage-cells
#13
Le Guo, Linlin Zhou, Qian Gao, Aijun Zhang, Jun Wei, Dantong Hong, Yuankui Chu, Xiangguo Duan, Ying Zhang, Guangxian Xu
MicroRNAs (miRNAs) are small noncoding nucleotides that play major roles in the response of host immune cells. Autophagy plays a key role in activating the antimicrobial host defense against Mycobacterium tuberculosis (M. tuberculosis). Whether miRNAs specifically influence the activation of macrophage autophagy during M. tuberculosis infection is largely unknown. In the present study, we demonstrate that Mycobacterium bovis Bacillus Calmette-Guérin (BCG) infection of macrophages leads to increased expression of miR-144-3p, which targets autophagy-related gene 4a (ATG4a), to inhibit autophagy activation and antimicrobial responses to BCG...
2017: PloS One
https://www.readbyqxmd.com/read/28636589/identifying-specificity-groups-in-the-t-cell-receptor-repertoire
#14
Jacob Glanville, Huang Huang, Allison Nau, Olivia Hatton, Lisa E Wagar, Florian Rubelt, Xuhuai Ji, Arnold Han, Sheri M Krams, Christina Pettus, Nikhil Haas, Cecilia S Lindestam Arlehamn, Alessandro Sette, Scott D Boyd, Thomas J Scriba, Olivia M Martinez, Mark M Davis
T cell receptor (TCR) sequences are very diverse, with many more possible sequence combinations than T cells in any one individual. Here we define the minimal requirements for TCR antigen specificity, through an analysis of TCR sequences using a panel of peptide and major histocompatibility complex (pMHC)-tetramer-sorted cells and structural data. From this analysis we developed an algorithm that we term GLIPH (grouping of lymphocyte interactions by paratope hotspots) to cluster TCRs with a high probability of sharing specificity owing to both conserved motifs and global similarity of complementarity-determining region 3 (CDR3) sequences...
June 21, 2017: Nature
https://www.readbyqxmd.com/read/28634555/a-rare-case-of-pneumopericardium-in-the-setting-of-tuberculous-constrictive-pericarditis
#15
Lauro L Abrahan Iv, Stephanie Martha O Obillos, Jaime Alfonso M Aherrera, Jose Donato A Magno, Celia Catherine C Uy-Agbayani, Ulysses King G Gopez, Jobelle Joyce Anne R Baldonado
A 28-year-old Filipino male was admitted due to high-grade fevers and dyspnea on a background of chronic cough and weight loss. Due to clinical and echocardiographic signs of cardiac tamponade, emergency pericardiocentesis was performed on his first hospital day. Five days after, chest radiographs showed new pockets of radiolucency within the cardiac shadow, indicative of pneumopericardium. On repeat echo, air microbubbles admixed with loculated effusion were visualized in the anterior pericardial space. Constrictive physiology was also supported by a thickened pericardium, septal bounce, exaggerated respiratory variation in AV valve inflow, and IVC plethora...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28634479/whole-blood-profiling-of-bacillus-calmette-gu%C3%A3-rin-induced-trained-innate-immunity-in-infants-identifies-epidermal-growth-factor-il-6-platelet-derived-growth-factor-ab-bb-and-natural-killer-cell-activation
#16
Steven G Smith, Johanneke Kleinnijenhuis, Mihai G Netea, Hazel M Dockrell
Vaccination of infants with bacillus Calmette-Guérin (BCG) activates both the innate and adaptive arms of the immune response. The antimycobacterial effects of these responses most likely account for the ability of BCG to protect against childhood forms of tuberculosis (TB). There is also evidence for a heterologous protective effect of BCG vaccination against TB-unrelated mortality in low birth weight infants. A possible mechanism of action of this effect, the induction of trained innate immunity, has been demonstrated when cells from BCG-vaccinated adults are restimulated in vitro with non-related microbial stimuli...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28634299/biosynthesis-of-isonitrile-lipopeptides-by-conserved-nonribosomal-peptide-synthetase-gene-clusters-in-actinobacteria
#17
Nicholas C Harris, Michio Sato, Nicolaus A Herman, Frederick Twigg, Wenlong Cai, Joyce Liu, Xuejun Zhu, Jordan Downey, Ryan Khalaf, Joelle Martin, Hiroyuki Koshino, Wenjun Zhang
A putative lipopeptide biosynthetic gene cluster is conserved in many species of Actinobacteria, including Mycobacterium tuberculosis and M. marinum, but the specific function of the encoding proteins has been elusive. Using both in vivo heterologous reconstitution and in vitro biochemical analyses, we have revealed that the five encoding biosynthetic enzymes are capable of synthesizing a family of isonitrile lipopeptides (INLPs) through a thio-template mechanism. The biosynthesis features the generation of isonitrile from a single precursor Gly promoted by a thioesterase and a nonheme iron(II)-dependent oxidase homolog and the acylation of both amino groups of Lys by the same isonitrile acyl chain facilitated by a single condensation domain of a nonribosomal peptide synthetase...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28633712/use-of-inhaled-corticosteroids-for-obstructive-lung-disease-following-anti-tuberculosis-treatment
#18
Anthony D Harries, Serge Ade, Nguyen Binh Hoa, Srinath Satyanarayana, Ajay M V Kumar
No abstract text is available yet for this article.
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28633710/symptom-based-screening-of-child-tb-contacts-defining-symptomatic
#19
Ben J Marais, Stephen M Graham
No abstract text is available yet for this article.
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28633709/primary-pulmonary-actinomycosis-a-retrospective-analysis-of-145-cases-in-mainland-china
#20
M Zhang, X-Y Zhang, Y-B Chen
OBJECTIVE: To improve our understanding of pulmonary actinomycosis. METHODS: A retrospective analysis of 145 cases in mainland China was conducted. RESULTS: The male:female ratio was 2.7:1. Mean age at diagnosis was 48 years (± 12). Main symptoms were cough (87.6%), expectoration (40%), blood-stained sputum (37.2%), fever (26.9%), chest pain (24.8%) and haemoptysis (16.6%). Eighty-eight (60.7%) patients had no underlying disease. Only five patients received a correct initial diagnosis; 60 patients were misdiagnosed with lung cancer, followed by pulmonary tuberculosis (TB) and lung abscess...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
keyword
keyword
114434
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"