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https://www.readbyqxmd.com/read/28719821/bcg-old-workhorse-new-skills
#1
REVIEW
M Gengenbacher, N E Nieuwenhuizen, She Kaufmann
Bacille Calmette-Guérin (BCG), the only tuberculosis (TB) vaccine in clinical practice, has limitations in efficacy, immunogenicity and safety. Much current TB vaccine research focuses on engineering live mycobacteria to interfere with phagosome biology and host intracellular pathways including apoptosis and autophagy, with candidates such as BCG Δzmp1, BCG ΔureC::hly, BCG::ESX-1(Mmar), Mtb ΔphoP ΔfadD26, Mtb ΔRD1 ΔpanCD and M. smegmatis Δesx-3::esx-3(Mtb) in the development pipeline. Correlates of protection in preclinical studies include increased central memory CD4(+) T cells and recruitment of antigen-specific T cells to the lungs, with mucosal vaccination found to be superior to parenteral vaccination...
July 15, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28719501/evaluation-of-the-adequacy-of-the-2010-revised-world-health-organization-recommended-dosages-of-the-first-line-antituberculosis-drugs-for-children
#2
Hongmei Yang, Anthony Enimil, Fizza S Gillani, Sampson Antwi, Albert Dompreh, Antoinette Ortsin, Eugene Adu Awhireng, Maxwell Owusu, Lubbe Wiesner, Charles A Peloquin, Awewura Kwara
BACKGROUND: The World Health Organization recommended increased dosages of the first-line antituberculosis (anti-TB) drugs for children in 2010. We examined the frequency of and factors associated with low plasma maximum concentration (Cmax) of each drug in children treated with the revised dosages. METHODS: Children on anti-TB therapy for at least 4 weeks underwent pharmacokinetic testing. Plasma Cmax below the lower limit of proposed reference range was considered low...
July 14, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28719497/serologic-responses-in-childhood-pulmonary-tuberculosis
#3
Bareng A S Nonyane, Mark P Nicol, Nicholas J Andreas, Stefanie Rimmele, Nicole Schneiderhan-Marra, Lesley J Workman, Mark D Perkins, Thomas Joos, Tobias Broger, Jerrold J Ellner, David Alland, Beate Kampmann, Susan E Dorman, Heather J Zar
BACKGROUND: Identification of the Mycobacterium tuberculosis immunoproteome and antigens associated with serologic responses in adults has renewed interest in developing a serologic test for childhood tuberculosis (TB). We investigated IgG antibody responses against M. tuberculosis antigens in children with well-characterized TB. METHODS: We studied archived sera obtained from hospitalized children with suspected pulmonary TB, and classified as having confirmed TB (culture-confirmed), unlikely TB (clinical improvement without TB treatment), or unconfirmed TB (all others)...
July 15, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28719295/regional-differences-in-the-prevalence-of-major-opportunistic-infections-among-antiretroviral-na%C3%A3-ve-human-immunodeficiency-virus-patients-in-japan-northern-thailand-northern-vietnam-and-the-philippines
#4
Louie Mar A Gangcuangco, Ikumi Sawada, Naho Tsuchiya, Cuong D Do, Thanh Thuy T Pham, Archawin Rojanawiwat, Marissa Alejandria, Katerina Leyritana, Yoshiyuki Yokomaku, Panita Pathipvanich, Koya Ariyoshi
To identify regional differences in the distribution of opportunistic infections (OIs) among human immunodeficiency virus (HIV)-infected patients in Asia, the medical records of antiretroviral therapy (ART)-naïve patients who attended the following tertiary hospitals from 2003 to 2011 were reviewed: Nagoya Medical Center (NMC, Nagoya, Japan), Lampang Hospital (LPH, Lampang, northern Thailand), Bach Mai Hospital (BMH, Hanoi, northern Vietnam), and Philippine General Hospital (PGH, Manila, Philippines). Logistic regression analyses were performed to identify associations between country of origin and risk of major OIs...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719264/the-human-microbiome-in-the-fight-against-tuberculosis
#5
Madeleine R Wood, Elaine A Yu, Saurabh Mehta
AbstractThe human microbiome is an intriguing potentially modifiable risk factor in our arsenal against Mycobacterium tuberculosis, the leading infectious disease killer globally. Previous studies have shown associations between the human microbiome and pulmonary disease states; however, etiological links between the microbiome and tuberculosis (TB) infection or disease remain unclear. Immunomodulatory roles of the microbiome may prove to be a critical asset in the host response against TB, including in preventing TB infection, reducing progression from latency, mitigating disease severity, and lowering the incidence of drug resistance and coinfections...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718777/an-assembly-and-interaction-of-upconversion-and-plasmonic-nanoparticles-on-organometallic-nanofibers-enhanced-multicolor-upconversion-downshifting-emission-and-plasmonic-effect
#6
Priyam Singh, Praveen Kumar Shahi, Rajiv Prakash, S B Rai
We herein present a novel inorganic-organic hybrid nanoparticle (HNPs) constituted of inorganic NPs, NaY0.78Er0.02Yb0.2F4, and organometallic nanofiber, Tb(ASA)3Phen (TAP). The X-ray diffraction, Fourier transform infrared absorption and TEM analyse reveal that, the prepared ultrafine upconversion nanoparticles {UCNPs (6-9 nm)} are dispersed on the surface of TAP nanofibers. We observe that addition of TAP in UCNPs, effectively prevents the surface quenching to boost the UC intensity and enables tuning of UC emission from green to red region by controlling the phonon frequency around Er3+ ion...
July 18, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28718615/development-of-nanofiber-sponges-containing-nerve-guidance-conduit-for-peripheral-nerve-regeneration-in-vivo
#7
Binbin Sun, Zi-Fei Zhou, Tong Wu, Weiming Chen, Dawei Li, Hao Zheng, Hany El-Hamshary, Salem S Al-Deyab, Xiumei Mo, Yinxian Yu
In the study of hollow nerve guidance conduit (NGC), the dispersion of regenerated axons always confused the researchers. To address this problem, filler-containing NGC was prepared, which showed better effect in the application of nerve tissue engineering. In this study, nanofiber sponges with abundant macro-pores, high porosity, and superior compressive strength were fabricated by electrospinning and freeze-drying. Poly (l-lactic acid-co-ε-caprolactone)/silk fibroin (PLCL/SF) nanofiber sponges were used as filler to prepare three-dimensional nanofiber sponges-containing (NS-containing) NGC...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28717643/chronic-airflow-obstruction-after-successful-treatment-of-multidrug-resistant-tuberculosis
#8
Anthony L Byrne, Ben J Marais, Carole D Mitnick, Frances L Garden, Leonid Lecca, Carmen Contreras, Yaninna Yauri, Fanny Garcia, Guy B Marks
Cross-sectional studies reveal an association between tuberculosis (TB) and chronic airflow obstruction, but cannot adequately address confounding. We hypothesised that treated pulmonary TB is an independent risk factor for chronic airflow obstruction. The Pulmones Post TB cohort study enrolled participants from Lima, Peru, aged 10-70 years with a history of drug-susceptible (DS)- or multidrug-resistant (MDR)-TB who had completed treatment and were clinically cured. Unexposed participants without TB were randomly selected from the same districts...
July 2017: ERJ Open Research
https://www.readbyqxmd.com/read/28717039/deletion-of-sigb-causes-increased-sensitivity-to-para-aminosalicylic-acid-and-sulfamethoxazole-in-mycobacterium-tuberculosis
#9
Shan-Shan Yang, Yang-Bo Hu, Xu-De Wang, Yun-Rong Gao, Kun Li, Xian-En Zhang, Shi-Yun Chen, Tian-Yu Zhang, Jing Gu, Jiao-Yu Deng
Although the de novo folate biosynthesis pathway has been well studied in bacteria, little is known about its regulation. In this study, the sigB gene in Mycobacterium tuberculosis (M. tb) was deleted. Subsequent drug susceptibility tests revealed that M. tb ΔsigB was more sensitive to para-aminosalicylic acid (PAS) and sulfamethoxazole (SMX). Comparative transcriptional analysis was performed and down-regulation of pabB was observed in the sigB deleted strain, which was further verified by qRT-PCR and Western blot assay...
July 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28716809/determining-clinical-decision-thresholds-for-hiv-positive-patients-suspected-of-having-tuberculosis
#10
Tom Boyles, Isabella Locatelli, Nicolas Senn, Mark Ebell
Clinical decision thresholds may aid the evaluation of diagnostic tests but have rarely been determined for tuberculosis (TB). We presented clinicians with six web-based clinical scenarios, describing patients with HIV and possible TB at various sites and with a range of clinical stability. The probability of disease was varied randomly and clinicians asked to make treatment decisions; threshold curves and therapeutic thresholds were calculated. Test and treatment thresholds were calculated using Bayes theorem and the diagnostic accuracy of Xpert MTB/RIF...
July 17, 2017: Evidence-based Medicine
https://www.readbyqxmd.com/read/28716677/incidence-of-active-tuberculosis-in-individuals-with-latent-tuberculosis-infection-in-rural-china-follow-up-results-of-a-population-based-multicentre-prospective-cohort-study
#11
Lei Gao, Xiangwei Li, Jianmin Liu, Xinhua Wang, Wei Lu, Liqiong Bai, Henan Xin, Haoran Zhang, Hengjing Li, Zongde Zhang, Yu Ma, Mufei Li, Boxuan Feng, Jiang Du, Hongtao Sui, Rong Zhao, Haoxiang Su, Shouguo Pan, Ling Guan, Fei Shen, Jian He, Shumin Yang, Hongyan Si, Xu Cheng, Zuhui Xu, Yunhong Tan, Tianzhu Chen, Weiguo Xu, Hong Peng, Zhijian Wang, Tao Zhu, Xiaoyou Chen, Xinhua Zhou, Xueling Guan, Qi Jin
BACKGROUND: The management of latent Mycobacterium tuberculosis infection is a new priority action for the WHO End Tuberculosis (TB) Strategy. However, national guidelines on latent tuberculosis infection testing and treatment have not yet been developed in China. Here, we present the results from the 2-year follow-up of a study that aimed to track the development of active disease in individuals with latent tuberculosis infection, identify priority populations for latent infection management, and explore the most suitable latent infection diagnostic approach...
July 14, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28716625/a-comparative-study-of-phenotypic-and-genotypic-first-and-second-line-drug-resistance-testing-of-mycobacterium-tuberculosis
#12
Fatemeh Sakhaee, Morteza Ghazanfari, Nayereh Ebrahimzadeh, Farzam Vaziri, Fatemeh Rahimi Jamnani, Mehdi Davari, Safoora Gharibzadeh, Fatemeh Hemati Mandjin, Abolfazl Fateh, Seyed Davar Siadat
This study aimed to evaluate the frequency of resistance to first- and second-line drugs using phenotypic and genotypic methods and its correlation with resistance-linked mutations in Mycobacterium tuberculosis (M. tb) isolated in Iran. Three different methods, including the indirect proportion method(PM), direct and indirect nitrate reductase assay(NRA), and direct sequencing were used to assess drug resistance. In this study, sensitivity, specificity, agreement, costs, and turnaround time of these methods were compared in 395 smear positive isolates...
July 15, 2017: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/28716042/tuberculosis-and-hiv-are-the-leading-causes-of-adult-death-in-northwest-ethiopia-evidence-from-verbal-autopsy-data-of-dabat-health-and-demographic-surveillance-system-2007-2013
#13
Yigzaw Kebede, Gashaw Andargie, Abebaw Gebeyehu, Tadesse Awoke, Mezgebu Yitayal, Solomon Mekonnen, Mamo Wubshet, Temesgen Azmeraw, Yihunie Lakew, Kassahun Alemu
BACKGROUND: Reliable data on causes of death form the basis for building evidence on health policy, planning, monitoring, and evaluation. In Ethiopia, the majority of deaths occur at home and civil registration systems are not yet functional. The main objective of verbal autopsy (VA) is to describe the causes of death at the community or population level where civil registration and death certification systems are weak and where most people die at home without having had contact with the health system...
July 17, 2017: Population Health Metrics
https://www.readbyqxmd.com/read/28715886/effects-of-swimming-exercise-on-high-fat-diet-induced-low-bone-mineral-density-and-trabecular-bone-microstructure-in-rats
#14
Yun-Seok Kang, Sang-Hyun Kim, Jae-Cheol Kim
PURPOSE: This study aimed to investigate the effect of swimming exercise on high-fat diet-induced low bone mineral density (BMD) and trabecular bone microstructure in rats. METHODS: Eight-week-old male Sprague- Dawley (SD) rats were divided into a normal diet group (n = 9) and a high-fat diet group (n = 15). Three rats in each group were sacrificed after 8 weeks of high-fat diet to evaluate the association between high-fat diet and bone health. The other 18 rats were reassigned to 3 groups (normal diet control, NC; high-fat diet control, HC; high-fat diet + Exercise, HEx) for up to another 8 weeks...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28715740/rhamnolipid-biosurfactant-complexation-of-rare-earth-elements
#15
David E Hogan, Joan E Curry, Jeanne E Pemberton, Raina M Maier
Rare earth elements (REE) are vital for modern technologies and considered critical materials. This study investigated monorhamnolipid biosurfactant interactions with REE as the basis for REE recovery technology. Conditional stability constants (log β), measured using a resin-based ion exchange method, are reported for 16 REE and metals. These results were combined with existing data for 10 other metals to assess comparative strength and determinants of binding. The stability constants could be divided into three groups: weakly, moderately, and strongly bound...
June 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28715439/knowledge-attitude-and-perceived-stigma-towards-tuberculosis-among-pastoralists-do-they-differ-from-sedentary-communities-a-comparative-cross-sectional-study
#16
Bezawit Temesgen Sima, Tefera Belachew, Fekadu Abebe
BACKGROUND: Ethiopia is ninth among the world high tuberculosis (TB) burden countries, pastoralists being the most affected population. However, there is no published report whether the behavior related to TB are different between pastoralist and the sedentary communities. Therefore, the main aim of this study is to assess the pastoralist community knowledge, attitude and perceived stigma towards tuberculosis and their health care seeking behavior in comparison to the neighboring sedentary communities and this may help to plan TB control interventions specifically for the pastoralist communities...
2017: PloS One
https://www.readbyqxmd.com/read/28715258/reply-from-the-authors-of-eligibility-for-the-shorter-mdr-tb-regimen-ambiguities-in-the-who-recommendations
#17
Francis Varaine, Lorenzo Guglielmetti, Carole D Mitnick
No abstract text is available yet for this article.
July 17, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28715229/reply-from-the-authors-of-limited-benefit-of-the-new-shorter-mdr-tb-regimen-in-europe
#18
Frank van Leth, Gunar Guenther, Harald Hoffmann, Christoph Lange
No abstract text is available yet for this article.
July 17, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28715120/characterization-of-a-multiple-particle-delivery-complex-and-determination-of-cellular-photodamage-in-skin-fibroblast-and-breast-cancer-cell-lines
#19
Ivan Mfouo-Tynga, Nicolette Nadene Houreld, Heidi Abrahamse
Zinc metallized Phthalocyanine (ZnPcSmix ), a potent photosensitizer (PS), is conjugated to gold dendrimer encapsulated nanoparticles (AuDENPs) in order to improve the efficacy of Photodynamic therapy (PDT) using MCF-7 breast cancer cells and WS1 fibroblast cells as a control. Both ZnPcSmix and AuDENPs are mixed in a nitrogen atmosphere for 48 h and characterization analysis conducted using ultra violet visible (UV-vis) spectrometry for spectral properties, transmission electron microscopy (TEM) for morphological features and zeta potential measurement for surface stability and size distribution of the compound obtained or of the multiple particles delivery complex (MPDC)...
July 17, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28715027/elongation-of-magnetic-relaxation-times-in-a-single-molecule-magnet-through-intermetallic-interactions-a-clamshell-type-dinuclear-terbium-iii-phthalocynaninato-quadruple-decker-complex
#20
Yoji Horii, Keiichi Katoh, Brian K Breedlove, Masahiro Yamashita
A clamshell-type terbium(iii)-phthalocyaninato quadruple-decker complex was synthesized. Magnetic measurements revealed that Tb-Tb interactions caused an increase in the magnetic relaxation time and enhanced the SMM properties.
July 17, 2017: Chemical Communications: Chem Comm
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