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https://www.readbyqxmd.com/read/29348586/analogues-of-disulfides-from-allium-stipitatum-demonstrate-potent-anti-tubercular-activities-through-drug-efflux-pump-and-biofilm-inhibition
#1
Cynthia A Danquah, Eleftheria Kakagianni, Proma Khondkar, Arundhati Maitra, Mukhlesur Rahman, Dimitrios Evangelopoulos, Timothy D McHugh, Paul Stapleton, John Malkinson, Sanjib Bhakta, Simon Gibbons
Disulfides from Allium stipitatum, commonly known as Persian shallot, were previously reported to possess antibacterial properties. Analogues of these compounds, produced by S-methylthiolation of appropriate thiols using S-methyl methanethiosulfonate, exhibited antimicrobial activity, with one compound inhibiting the growth of Mycobacterium tuberculosis at 17 µM (4 mg L-1) and other compounds inhibiting Escherichia coli and multi-drug-resistant (MDR) Staphylococcus aureus at concentrations ranging between 32-138 µM (8-32 mg L-1)...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29347843/combinatorial-design-and-virtual-screening-of-potent-anti-tubercular-fluoroquinolone-and-isothiazoloquinolone-compounds-utilizing-qsar-and-pharmacophore-modelling
#2
S Nandi, S Ahmed, A K Saxena
The virulence of tuberculosis infections resistant to conventional combination drug regimens cries for the design of potent fluoroquinolone compounds to be used as second line antimycobacterial chemotherapeutics. One of the most effective in silico methods is combinatorial design and high throughput screening by a ligand-based pharmacophore prior to experiment. The combinatorial design of a series of 3850 fluoroquinolone and isothiazoloquinolone compounds was then screened virtually by applying a topological descriptor based quantitative structure activity relationship (QSAR) for predicting highly active congeneric quinolone leads against Mycobacterium fortuitum and Mycobacterium smegmatis...
February 2018: SAR and QSAR in Environmental Research
https://www.readbyqxmd.com/read/29345292/preparation-and-characterization-of-the-antibody-recognizing-amacr-inside-its-catalytic-center
#3
Boris V Popov, Gleb I Sutula, Nikolay S Petrov, Ximing J Yang
Alpha-methylacyl-CoA racemase (AMACR) catalyzes the β-oxidation of fatty acids and is overexpressed in carcinomas in various organs, while its inactivation results in the inhibition of cancer growth. In the present study, we prepared and characterized 20 different mouse monoclonal antibodies against human AMACR. In the course of biopanning of a phage peptide commercial library against in-house prepared 6H9 and 2A5, and commercial 13H4 antibodies, 10 phage mimotopes recognized by each type of the antibody were selected...
February 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29345081/screening-for-latent-tuberculosis-infection-among-patients-with-rheumatoid-arthritis-in-the-era-of-biologics-and-targeted-synthetic-disease-modifying-anti-rheumatic-drugs-in-india-a-high-burden-tb-country-the-importance-of-mantoux-and-quantiferon-tb-gold-tests
#4
Anand N Malaviya, Vishal K Aggarwal, Roopa Rawat, Sadhana Baghel, Ravita Thakran, Qamar Zaheer, Shriram Garg, Sanjiv Kapoor
AIM: To test the validity of an augmented tuberculosis skin test (a-TST) combined with Quantiferon TB-gold® (QFTG) test for the screening of latent tuberculosis infection (LTBI) in patients with rheumatoid arthritis (RA) being considered for treatment with biologic disease-modifying anti-rheumatic drugs or targeted synthetic disease-modifying anti-rheumatic drugs. METHOD: Standard TST using 1 tuberculin unit (TU) of purified protein derivative (PPD, RT23 strain) was carried out...
January 17, 2018: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29338816/fabrication-of-isoniazid-rifampicin-poly-l-lactic-acid-donut-shaped-implants-via-three-dimensional-printing-technique
#5
Gui Wu, Wei Gang Wu, Jian Bo Zhou, Qi Xin Zheng
Objective To investigate the possibility of manufacturing dual-drug loaded isoniazid/rifampicin/poly L-lactic acid (PLLA) implant with donut-shaped structure via three-dimensional (3D) printing technique and study the drug release characteristic and biocompatibility of the implant in vitro.Methods PLLA was crushed into particles with diameters around 75-100 μm.Isoniazid and rifampicin bulk drugs were dissolved into the organic dissolvent respectively to be the binding liquid.The 3D printing machine fabricated the donut-shaped implant via binding the PLLA powder layer by layer...
December 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/29335214/in%C3%A2-vivo-potent-bm635-analogue-with-improved-drug-like-properties
#6
Giovanna Poce, Martina Cocozza, Salvatore Alfonso, Sara Consalvi, Giulia Venditti, Raquel Fernandez-Menendez, Robert H Bates, David Barros Aguirre, Lluis Ballell, Alessandro De Logu, Giulio Vistoli, Mariangela Biava
BM635 is the hit compound of a promising anti-TB compound class. Herein we report systematic variations around the central pyrrole core of BM635 and we describe the design, synthesis, biological evaluation, pharmacokinetic analysis, as well as in vivo TB mouse efficacy studies of novel BM635 analogues that show improved physicochemical properties. This hit-to-lead campaign led to the identification of a new analogue, 4-((1-isopropyl-5-(4-isopropylphenyl)-2-methyl-1H-pyrrol-3-yl)methyl)morpholine (17), that shows excellent activity (MIC = 0...
December 27, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29333042/gas-chromatography-mass-spectrometry-profiling-in-methanolic-and-ethyl-acetate-root-and-stem-extract-of-corbichonia-decumbens-forssk-exell-from-thar-desert-of-rajasthan-india
#7
Sunita Arora, Manju Saini
Background: Corbichonia decumbens (Forssk.) Exell (Molluginaceae), recently has moved to Lophiocarpaceae as per angiospermic plant group (APG) III system, is an annual or short-lived, dwarf, glabrous subshrub, prefers to grow on rocky places and on sand-stones in dry, hot areas of Rajasthan. This is the potential plant with medicinal properties. Vegetative organs under study show antioxidant, anti-inflammatory, antiulcer, antimicrobial, and antinociception activity. Objective: This study was carried out to identify the phytoconstituents present in the methanolic and ethyl-acetate extract of root and stem of C...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332658/an-extremely-rare-association-of-sweet-s-syndrome-with-active-pulmonary-tuberculosis
#8
Sandhya Chauhan
Sweet's syndrome is a skin manifestation of various systemic infections, drugs, malignancies and autoimmune disorders. There are very few case reports describing the relationship between Sweet's syndrome and non-tubercular mycobacterium infection. Further development of Sweet's syndrome secondary to mycobacterium tuberculosis (active pulmonary tuberculosis) is extremely uncommon and this is the second well established case reported from India. Here we report a forty eight year old man who presented with multiple erythematous and tender plaques over neck, palms and sides of soles...
January 2018: Indian Journal of Tuberculosis
https://www.readbyqxmd.com/read/29332649/isoniazid-and-rifampicin-heteroresistant-mycobacterium-tuberculosis-isolated-from-tuberculous-meningitis-patients-in-india
#9
Renu Gupta, Rajeev Thakur, Suman Kushwaha, Nupur Jalan, Pumanshi Rawat, Piyush Gupta, Amitesh Aggarwal, Meena Gupta, Vikas Manchanda
BACKGROUND: Heteroresistant Mycobacterium tuberculosis (mixture of susceptible and resistant subpopulations) is thought to be a preliminary stage to full resistance and timely detection, initiation of correct treatment is vital for successful anti tubercular therapy. The aim of this study was to detect multi drug resistant (MDR) and heteroresistant M. tuberculosis with the associated gene mutations from patients of tuberculous meningitis. METHODS: A total of 197 M...
January 2018: Indian Journal of Tuberculosis
https://www.readbyqxmd.com/read/29322681/gut-microbiome-contributes-to-impairment-of-immunity-in-pulmonary-tuberculosis-patients-by-alteration-of-butyrate-and-propionate-producers
#10
Abhijit Maji, Richa Misra, Darshan B Dhakan, Vipin Gupta, Nitish K Mahato, Rituja Saxena, Parul Mittal, Nitin Thukral, Eshan Sharma, Anoop Singh, Richa Virmani, Mohita Gaur, Harshvardhan Singh, Yasha Hasija, Gunjan Arora, Anurag Agrawal, Anil Chaudhry, Jitendra P Khurana, Vineet K Sharma, Rup Lal, Yogendra Singh
Tuberculosis (TB) is primarily associated with decline in immune health status. As gut microbiome (GM) is implicated in the regulation of host immunity and metabolism, here we investigate GM alteration in TB patients by 16S rRNA gene and whole-genome shotgun sequencing. The study group constituted of patients with pulmonary TB and their healthy household contacts as controls (HCs). Significant alteration of microbial taxonomic and functional capacity was observed in patients with active TB as compared to the HCs...
January 2018: Environmental Microbiology
https://www.readbyqxmd.com/read/29321020/meta-analysis-of-human-gene-expression-in-response-to-mycobacterium-tuberculosis-infection-reveals-potential-therapeutic-targets
#11
Zhang Wang, Seda Arat, Michal Magid-Slav, James R Brown
BACKGROUND: With the global emergence of multi-drug resistant strains of Mycobacterium tuberculosis, new strategies to treat tuberculosis are urgently needed such as therapeutics targeting potential human host factors. RESULTS: Here we performed a statistical meta-analysis of human gene expression in response to both latent and active pulmonary tuberculosis infections from nine published datasets. We found 1655 genes that were significantly differentially expressed during active tuberculosis infection...
January 10, 2018: BMC Systems Biology
https://www.readbyqxmd.com/read/29319042/multidrug-resistant-tuberculosis-rifampicin-resistant-tuberculosis-principles-of-management
#12
Rajendra Prasad, Nikhil Gupta, Amitabh Banka
Multidrug-resistant tuberculosis (MDR-TB)/rifampicin-resistant TB (RR-TB) is human-made problem and emerging due to poor management of TB and is a threat to control of TB. Early suspicion and diagnosis are important. Culture and drug susceptibility testing are gold standards, but newer molecular methods help in rapid diagnosis. Once diagnosed, prompt treatment should be started, preferably under direct observation. Treatment can be standardized or individualized. Conventional regimen takes up to 24 months but recently shorter regimen of up to 12 months was introduced in specific subset of MDR-TB/RR-TB patients...
January 2018: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/29313577/a-randomized-controlled-phase-iii-clinical-trial-to-evaluate-the-efficacy-and-tolerability-of-risorine-with-conventional-rifampicin-in-the-treatment-of-newly-diagnosed-pulmonary-tuberculosis-patients
#13
Naresh Patel, K Jagannath, Agam Vora, Mukesh Patel, Anand Patel
Background: The overall goals for treatment of Tuberculosis (TB) are to cure individual patient and to minimize the transmission of Mycobacterium tuberculosis. At the time of study conduction, the standard treatment for newly diagnosed tuberculosis patients consisted of an intensive phase for two months with four drugs (HRZE), followed by continuation phase for four months with two drugs (HR). Rifampicin, which is very effective against Mycobacterium tuberculosis, in both the phases of treatment, has certain concerns, which includes, decreased bioavailability with chronic use and hepatotoxicity...
September 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29311276/species-specific-interactions-of-arr-with-rplk-mediate-stringent-response-in-bacteria
#14
Priyanka Agrawal, Rajagopal Varada, Shivjee Sah, Souvik Bhattacharyya, Umesh Varshney
Bacteria respond to stressful growth conditions through a conserved phenomenon of 'stringent response' mediated by synthesis of stress alarmones, ppGpp or pppGpp [referred to as (p)ppGpp]. The (p)ppGpp synthesis is known to occur by ribosome associated RelA. In addition, a dual function protein SpoT (with both the synthetase and hydrolase activities) maintains (p)ppGpp homeostasis. The presence of (p)ppGpp is also known to contribute to antibiotic resistance in bacteria. Mycobacterium smegmatis possesses Arr, which inactivates rifampicin by its ADP-ribosylation...
January 8, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29302148/association-of-risk-factors-and-drug-resistance-pattern-in-tuberculosis-patients-in-north-india
#15
Pallavi Sinha, G N Srivastava, Anamika Gupta, Shampa Anupurba
Context: India is one of the high tuberculosis (TB) burden countries in the world. Improper implementation in the guidelines for the management of TB and high rate of defaults on the part of the patients are most important risk factors for the development of multi-drug resistant TB. Aims: This study examines the drug resistance profile and the effect of demographic, clinical and behavioral risk factors on the prevalence of TB and multidrug resistance (MDR) in north India...
October 2017: Journal of Global Infectious Diseases
https://www.readbyqxmd.com/read/29301734/serial-c-reactive-protein-measurements-in-patients-treated-for-suspected-abdominal-tuberculosis
#16
Vishal Sharma, Harshal S Mandavdhare, Sandeep Lamoria, Harjeet Singh, Amit Kumar
BACKGROUND: Response to treatment is often used as a criterion for the diagnosis of abdominal tuberculosis. AIM: To determine utility of serum C reactive protein (CRP) in assessment of response to anti-tubercular therapy (ATT) in abdominal tuberculosis (ATB). METHODS: We retrospectively analysed the database of patients with suspected ATB (intestinal and/or peritoneal). Response to ATT was assessed using subjective and objective (ulcer healing or ascites resolution) parameters...
December 19, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/29297426/risk-factors-for-extensive-drug-resistance-in-multidrug-resistant-tuberculosis-cases-a-case-case-study
#17
L Guglielmetti, N Veziris, A Aubry, F Brossier, C Bernard, W Sougakoff, V Jarlier, J Robert
SETTINGS: Identification of extensively drug-resistant tuberculosis (XDR-TB) may be delayed because of the lack of availability of molecular testing for second-line drugs (SLDs). Early suspicion of XDR-TB is therefore necessary to avoid developing further drug resistance. OBJECTIVE: To identify the characteristics associated with XDR-TB among multidrug-resistant TB (MDR-TB) cases before the availability of second-line drug susceptibility testing (DST) results. METHODS: All MDR-TB cases with available second-line DST results recorded in France from 1998 to 2013 were classified as simple MDR-TB (no resistance to fluoroquinolones [FQs] or second-line injectable drugs [SLIDs]), pre-XDR-TB (resistance to FQs or SLIDs) and XDR-TB cases (resistance to both)...
January 1, 2018: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/29297425/extensively-drug-resistant-tuberculosis-in-myanmar-burden-and-mutations-causing-second-line-drug-resistance
#18
P W Ei, W W Aung, W W Nyunt, T L Swe, M M Htwe, S M Win, S T Aung, C L Chang, H-Y Lee, J S Lee
SETTING: Two tuberculosis (TB) reference laboratories in Myanmar. OBJECTIVES: To determine the proportion of extensively drug-resistant TB (XDR-TB) cases among multidrug-resistant TB (MDR-TB) cases and the mutations that cause resistance to second-line drugs in Myanmar. DESIGN: This was a cross-sectional, retrospective study. Multidrug-resistant Mycobacterium tuberculosis isolates were collected during 2015-2016. Phenotypic drug susceptibility testing (DST) was performed and drug-resistant mutations identified by sequencing...
January 1, 2018: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/29297423/meropenem-clavulanate-for-drug-resistant-tuberculosis-a-follow-up-of-relapse-free-cases
#19
M C Payen, I Muylle, O Vandenberg, V Mathys, M Delforge, S Van den Wijngaert, N Clumeck, S De Wit
BACKGROUND: Extensively drug-resistant tuberculosis (XDR-TB), defined as TB caused by a Mycobacterium strain resistant to at least rifampicin, isoniazid, any fluoroquinolone and one of the injectable anti-tuberculosis drugs, remains a worldwide public health threat. Among repurposed drugs empirically used for XDR-TB cases, carbapenems have been studied in vitro and in animal models, with encouraging results. However, only short-term follow-up data from clinical studies are currently available...
January 1, 2018: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/29297417/making-optimal-use-of-available-anti-tuberculosis-drugs-first-steps-to-investigate-terizidone
#20
J W C Alffenaar, C A Peloquin, G B Migliori
No abstract text is available yet for this article.
January 1, 2018: International Journal of Tuberculosis and Lung Disease
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