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https://www.readbyqxmd.com/read/28333945/environmental-reservoirs-of-pathogenic-mycobacteria-across-the-ethiopian-biogeographical-landscape
#1
Hayley C King, Tanya Khera-Butler, Phillip James, Brian B Oakley, Girume Erenso, Abraham Aseffa, Rob Knight, Elizabeth M Wellington, Orin Courtenay
The Mycobacterium genus comprises over one-hundred-and-fifty recognised species, the majority of which reside in the environment and many of which can be pathogenic to mammals. Some species of environmental mycobacteria may interfere with BCG vaccination efficacy and in tuberculin test interpretation. Examining biogeographic trends in the distribution of members of the mycobacteria across a number of physicochemical and spatial gradients in soil and water environments across Ethiopia using oligotyping identified differential distributions of pathogenic and significant species...
2017: PloS One
https://www.readbyqxmd.com/read/28331078/tuberculin-skin-testing-boosts-interferon-gamma-responses-to-diva-reagents-in-mycobacterium-bovis-infected-cattle
#2
Gareth J Jones, Mick Coad, Bhagwati Khatri, Javier Bezos, Natalie A Parlane, Bryce M Buddle, Bernardo Villarreal-Ramos, R Glyn Hewinson, H Martin Vordermeier
BCG vaccination sensitises cattle to bovine tuberculin which compromises the use of the current bovine TB surveillance tests. Although the performance of a blood test (that utilises antigens expressed by Mycobacterium bovis but not by BCG) capable of discriminating infected from vaccinated animals (DIVA interferon-gamma test, DIT) has been evaluated in naturally infected TB field reactors, there is a need to perform similar analysis in a BCG vaccinated/M. bovis infected population. Furthermore, we explored different scenarios under which a DIT may be implemented alongside BCG vaccination: (i) serial testing to resolve potential false positive skin test results; or (ii) standalone test to replace the single intradermal comparative cervical tuberculin skin test (SICCT)...
March 22, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28329234/revaccination-of-guinea-pigs-with-the-live-attenuated-mycobacterium-tuberculosis-vaccine-mtbvac-improves-bcg-s-protection-against-tuberculosis
#3
Simon Clark, Faye Lanni, Dessislava Marinova, Emma Rayner, Carlos Martin, Ann Williams
Background.: The need for an effective vaccine against human tuberculosis has driven the development of different candidates and vaccination strategies. Novel live attenuated vaccines are being developed that promise greater safety and efficacy than BCG against tuberculosis. We combined BCG with the vaccine MTBVAC to evaluate whether the efficacy of either vaccine would be affected upon revaccination. Methods.: In a well-established guinea pig model of aerosol infection with Mycobacterium tuberculosis, BCG and MTBVAC delivered via various prime-boost combinations or alone were compared...
January 25, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28321208/detection-of-a-putative-tetr-like-gene-related-to-mycobacterium-bovis-bcg-growth-in-cholesterol-using-a-gfp-transposon-mutagenesis-system
#4
Isabel Otal, Esther Pérez-Herrán, Lazaro Garcia-Morales, María C Menéndez, Jorge A Gonzalez-Y-Merchand, Carlos Martín, María J García
In vitro transposition is a powerful genetic tool for identifying mycobacterial virulence genes and studying virulence factors in relation to the host. Transposon shuttle mutagenesis is a method for constructing stable insertions in the genome of different microorganisms including mycobacteria. Using an IS1096 derivative, we have constructed the Tngfp, a transposon containing a promoterless green fluorescent protein (gfp) gene. This transposon was able to transpose randomly in Mycobacterium bovis BCG. Bacteria with a single copy of the gfp gene per chromosome from an M...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28318770/expression-of-cathepsin-s-in-bcg-converts-it-into-a-pro-apoptotic-and-highly-immunogenic-strain
#5
Alice Lau, Vijender Singh, Hafid Soualhine, Zakaria Hmama
BACKGROUND: BCG vaccine, introduced almost 100years ago, is the only option to prevent TB disease. It effectively protects newborns from meningeal TB but fails to prevent adult pulmonary TB. TB kills 1.3million people annually in areas where BCG vaccination is widely practiced. Thus, more effective TB vaccines are urgently needed. Others and we have shown that BCG mimics features of virulent M. tuberculosis, in particular attenuation of essential macrophage functions such as phagosome maturation and antigen presentation...
March 16, 2017: Vaccine
https://www.readbyqxmd.com/read/28318766/bacille-calmette-gu%C3%A3-rin-bcg-vaccination-at-birth-and-antibody-responses-to-childhood-vaccines-a-randomised-clinical-trial
#6
Thomas Nørrelykke Nissen, Nina Marie Birk, Gaby Smits, Dorthe Lisbeth Jeppesen, Lone Graff Stensballe, Mihai G Netea, Fiona van der Klis, Christine Stabell Benn, Ole Pryds
INTRODUCTION: BCG vaccination has been associated with beneficial non-specific effects on child health. Some immunological studies have reported heterologous effects of vaccines on antibody responses to heterologous vaccines. Within a randomised clinical trial of Bacille Calmette-Guérin (BCG) vaccination at birth, The Danish Calmette Study, we investigated the effect of BCG at birth on the antibody response to the three routine vaccines against DiTeKiPol/Act-Hib and Prevenar 13 in a subgroup of participants...
March 15, 2017: Vaccine
https://www.readbyqxmd.com/read/28317308/afebrile-kawasaki-disease-with-coronary-artery-dilatation
#7
Atsunori Yoshino, Risa Tanaka, Tadamasa Takano, Tsutomu Oishi
Herein we describe the cases of two afebrile patients who were thought to have Kawasaki disease (KD). Patient 1 was a 7-month-old-Japanese girl. She presented with bulbar conjunctival injection, diarrhea, skin erythema, and redness around the bacillus Calmette-Guerin (BCG) inoculation site. Thirteen days after the first symptoms, ultrasonic cardiogram (UCG) showed dilatations of the bilateral coronary arteries (CA). The dilatations had completely resolved 5 months later. Patient 2 was a 13-month-old Japanese boy...
March 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28317028/mycobacterial-caseinolytic-protease-gene-regulator-clgr-is-a-substrate-of-caseinolytic-protease
#8
Yoshiyuki Yamada, Thomas Dick
The mycobacterial caseinolytic protease ClpP1P2 is a degradative protease that recently gained interest as a genetically and pharmacologically validated drug target for tuberculosis. The first whole-cell active ClpP1P2 inhibitor, the human proteasome inhibitor bortezomib, is currently undergoing lead optimization to introduce selectivity for the bacterial target. How inhibition of ClpP1P2 translates into whole-cell antimicrobial activity is little understood. Previous work has shown that the caseinolytic protease gene regulator ClgR is an activator of the clpP1P2 genes and also suggested that this transcription factor may be a substrate of the protease...
March 2017: MSphere
https://www.readbyqxmd.com/read/28316859/mycotic-aneurysm-after-bacillus-calmette-gu%C3%A3-rin-treatment-case-report-and-review-of-the-literature
#9
Nathaniel D Coddington, Jesse K Sandberg, Chen Yang, Jennifer K Sehn, Eric H Kim, Seth A Strope
Background. Intravesicular Bacillus Calmette-Guérin (BCG) is an effective adjunctive therapy for superficial bladder cancer that has been shown to delay recurrence and progression of disease. Serious side effects are relatively rare but are difficult to diagnosis and commonly overlooked. Case Presentation. We report the case of a patient who was found to have mycotic aortic aneurysms secondary to treatment with BCG after a prolonged course with multiple intervening hospitalizations. Conclusion. Through this report, we discuss our present understanding of BCG infection following treatment and review the literature regarding this particular rare manifestation...
2017: Case Reports in Urology
https://www.readbyqxmd.com/read/28314076/lactococcus-lactis-carrying-a-dna-vaccine-coding-for-the-esat-6-antigen-increases-il-17-cytokine-secretion-and-boosts-the-bcg-vaccine-immune-response
#10
Vanessa Bastos Pereira, Vanessa Pecini da Cunha, Tatiane Melo Preisser, Bianca Mendes Souza, Meritxell Zurita Turk, Camila Prósperi De Castro, Marcela Santiago Pacheco Azevedo, Anderson Miyoshi
AIMS: A regimen utilizing BCG and another vaccine system as a booster may represent a promising strategy for the development of an efficient tuberculosis vaccine for adults. In a previous work, we confirmed the ability of Lactococcus lactis FnBPA+ (pValac:ESAT-6), a live mucosal DNA vaccine, to produce a specific immune response in mice after oral immunization. In the present study, we examined the immunogenicity of this strain as a booster for the BCG vaccine in mice. METHODS AND RESULTS: After immunization, cytokine and immunoglobulin profiles were measured...
March 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28301284/immunogenicity-and-protective-efficacy-of-recombinant-bacille-calmette-guerin-strains-expressing-mycobacterium-antigens-ag85a-cfp10-esat-6-gm-csf-and-il-12p70
#11
Fu-Ying Dai, Jun-Fang Wang, Xue-Li Gong, Lang Bao
OBJECTIVE: This study aimed to evaluate the immunogenicity and protective efficacy of recombinant bacille calmette-guerin (rBCG) strains expressing Ag85A (A), CFP10 (C), ESAT6 (E), IL-12p70 (I), and fusion protein GM-CSF (G). METHOD: rBCGs were established by integrating of A, C, E, I, G, AE, CE, IE, GC, GE and GCE into Mycobacterium bovis BCG-1173 and BCG-SH. The macro-effects of rBCGs on mice were evaluated by phenotype and weight. The immunogenicity of rBCGs was analyzed by lgG, lgG1 and lgG2a antibody titers, and IFN-γ and IL-4 contents through Enzyme-linked immunosorbent assay (ELISA)...
February 14, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28297677/recombinant-bcg-expressing-esx-1-of-mycobacterium-marinum-combines-low-virulence-with-cytosolic-immune-signaling-and-improved-tb-protection
#12
Matthias I Gröschel, Fadel Sayes, Sung Jae Shin, Wafa Frigui, Alexandre Pawlik, Mickael Orgeur, Robin Canetti, Nadine Honoré, Roxane Simeone, Tjip S van der Werf, Wilbert Bitter, Sang-Nae Cho, Laleh Majlessi, Roland Brosch
Recent insights into the mechanisms by which Mycobacterium tuberculosis, the etiologic agent of human tuberculosis, is recognized by cytosolic nucleotide sensors have opened new avenues for rational vaccine design. The only licensed anti-tuberculosis vaccine, Mycobacterium bovis BCG, provides limited protection. A feature of BCG is the partial deletion of the ESX-1 type VII secretion system, which governs phagosomal rupture and cytosolic pattern recognition, key intracellular phenotypes linked to increased immune signaling...
March 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28293387/cfp10-mfc%C3%AE-2-as-a-novel-tuberculosis-vaccine-candidate-increases-immune-response-in-mouse
#13
Ali Asghar Baghani, Saman Soleimanpour, Hadi Farsiani, Arman Mosavat, Masoud Yousefi, Zahra Meshkat, Seyed Abdolrahim Rezaee, Saeid Amel Jamehdar, Mohammad Reza Akbari Eydgahi, Hamid Sadeghian, Kiarash Ghazvini
OBJECTIVES: Despite treatment with antibiotics and vaccination with BCG, tuberculosis (TB) is still considered as one of the most important public health problems in the world. Therefore, designing and producing a more effective vaccine against TB seems urgently. In this study, immunogenicity of a fusion protein which consisting or comprising CFP-10 from Mycobacterium tuberculosis and the Fc-domain of mouse IgG2a was evaluated as a novel subunit vaccine candidate against TB. MATERIALS AND METHODS: The genetic constructs were cloned in pPICZαA expression vector and recombinant vectors (pPICZαA-CFP-10: Fcγ2a and pPICZαA-CFP-10:His) were transformed into Pichia pastoris...
February 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28293065/the-combination-of-mbp-and-bcg-induced-dendritic-cell-maturation-through-tlr2-tlr4-promotes-th1-activation-in-vitro-and-vivo
#14
LiNa Jiang, GuoMu Liu, WeiHua Ni, NanNan Zhang, Jing Jie, Fei Xie, GuiXiang Tai
To explore whether TLR2/TLR4 could be involved in the maturation of dendritic cells and polarization of CD4(+) T cells induced by dendritic cells stimulated with MBP and BCG, in vitro and in vivo experiments using TLR2(-/-) or TLR4(-/-) mice were employed. MBP and BCG elevated CD80, CD86 and MHC class II expressed on dendritic cells and increased IL-12 protein, induced DC maturation, and indirectly promoted Th1 activation. Moreover, MBP and BCG upregulated costimulatory molecules on DCs in a TLR2- and TLR4-dependent manner...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28290692/amphiphilic-indole-derivatives-as-antimycobacterial-agents-structure-activity-relationships-and-membrane-targeting-properties
#15
Tianming Yang, Wilfried Moreira, Samuel Agyei Nyantakyi, Huan Chen, Dinah Binte Aziz, Mei-Lin Go, Thomas Dick
Antibacterials that disrupt cell membrane function have the potential to eradicate 'persister' organisms and delay the emergence of resistance. Here we report the antimycobacterial activities of 4-fluoro and 6-methoxyindoles bearing a cationic amphiphilic motif represented by a lipophilic n-octyl side chain at position 1 and a positively charged azepanyl or 1,4-dioxa-8-azaspiro[4.5]decane moiety at position 3. These analogs exhibited balanced profiles of potency (Mycobacterium bovis BCG, M tuberculosis H37Rv), selective activity, solubility and metabolic stability...
March 14, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28289079/deletion-of-f4l-ribonucleotide-reductase-in-vaccinia-virus-produces-a-selective-oncolytic-virus-and-promotes-anti-tumor-immunity-with-superior-safety-in-bladder-cancer-models
#16
Kyle G Potts, Chad R Irwin, Nicole A Favis, Desmond B Pink, Krista M Vincent, John D Lewis, Ronald B Moore, Mary M Hitt, David H Evans
Bladder cancer has a recurrence rate of up to 80% and many patients require multiple treatments that often fail, eventually leading to disease progression. In particular, standard of care for high-grade disease, Bacillus Calmette-Guérin (BCG), fails in 30% of patients. We have generated a novel oncolytic vaccinia virus (VACV) by mutating the F4L gene that encodes the virus homolog of the cell-cycle-regulated small subunit of ribonucleotide reductase (RRM2). The F4L-deleted VACVs are highly attenuated in normal tissues, and since cancer cells commonly express elevated RRM2 levels, have tumor-selective replication and cell killing...
March 13, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28288747/mobile-phone-delivered-reminders-and-incentives-to-improve-childhood-immunisation-coverage-and-timeliness-in-kenya-m-simu-a-cluster-randomised-controlled-trial
#17
Dustin G Gibson, Benard Ochieng, E Wangeci Kagucia, Joyce Were, Kyla Hayford, Lawrence H Moulton, Orin S Levine, Frank Odhiambo, Katherine L O'Brien, Daniel R Feikin
BACKGROUND: As mobile phone access continues to expand globally, opportunities exist to leverage these technologies to support demand for immunisation services and improve vaccine coverage. We aimed to assess whether short message service (SMS) reminders and monetary incentives can improve immunisation uptake in Kenya. METHODS: In this cluster-randomised controlled trial, villages were randomly and evenly allocated to four groups: control, SMS only, SMS plus a 75 Kenya Shilling (KES) incentive, and SMS plus 200 KES (85 KES = USD$1)...
April 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28286068/efficacy-of-bacillus-calmette-guerin-strains-for-the-treatment-of-non-muscle-invasive-bladder-cancer-a-systematic-review-and-network-meta-analysis
#18
REVIEW
Brock E Boehm, John E Cornell, Hanzhang Wang, Neelam Mukherjee, Jacob S Oppenheimer, Robert S Svatek
PURPOSE: To determine the efficacy of genetically distinct Bacillus Calmette-Guérin (BCG) strains in preventing disease recurrence for patients with non-muscle invasive bladder cancer (NMIBC). EXPERIMENTAL DESIGN: We conducted a systematic review and network meta-analysis of trials evaluating BCG strains against all possible comparators (different BCG strains, chemotherapy, and non-BCG biologic therapies) and intravesical chemotherapy as the common comparator. MEDLINE served as the primary data source, with search from inception to October 2016 for clinical trials involving patients with NMIBC receiving BCG...
March 9, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28285273/bcg-induced-lupus-vulgaris-an-unexpected-adverse-event
#19
Elaine Pace Spadaro, John Xuereb Dingli, Rainer Doffinger, Kumararatne Dinakantha, Alexandra Betts, David Pace
No abstract text is available yet for this article.
March 11, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28284725/altered-helper-t-cell-mediated-immune-responses-in-male-mice-conceived-through-in-vitro-fertilization
#20
Hiwa Karimi, Pooya Mahdavi, Shohreh Fakhari, Mohammad Reza Faryabi, Parisa Esmaeili, Omid Banafshi, Ebrahim Mohammadi, Fardin Fathi, Aram Mokarizadeh
A study using a mouse IVF model was conducted to examine the hypothesis that in vitro fertilization (IVF) treatment may lead to immune system alteration in the offspring. Phagocytic activity and lymphocyte proliferative responses to mitogen, alloantigen, and purified protein derivative (PPD) of Mycobacterium bovis were investigated in the splenocytes of BCG-treated male mice conceived by IVF or natural conception. Intracellular expression of T-bet and GATA3 in helper T-cell population were examined in both groups...
March 9, 2017: Reproductive Toxicology
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