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https://www.readbyqxmd.com/read/28603700/the-type-ix-secretion-system-t9ss-highlights-and-recent-insights-into-its-structure-and-function
#1
REVIEW
Anna M Lasica, Miroslaw Ksiazek, Mariusz Madej, Jan Potempa
Protein secretion systems are vital for prokaryotic life, as they enable bacteria to acquire nutrients, communicate with other species, defend against biological and chemical agents, and facilitate disease through the delivery of virulence factors. In this review, we will focus on the recently discovered type IX secretion system (T9SS), a complex translocon found only in some species of the Bacteroidetes phylum. T9SS plays two roles, depending on the lifestyle of the bacteria. It provides either a means of movement (called gliding motility) for peace-loving environmental bacteria or a weapon for pathogens...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28574731/why-gene-editors-like-crispr-cas-may-be-a-game-changer-for-neuroweapons
#2
Diane DiEuliis, James Giordano
This year marks the Eighth Review Conference (RevCon) of the Biological Toxins and Weapons Convention (BWC). At the same time, ongoing international efforts to further and more deeply investigate the brain's complex neuronal circuitry are creating unprecedented capabilities to both understand and control neurological processes of thought, emotion, and behavior. These advances have tremendous promise for human health, but the potential for their misuse has also been noted, with most discussions centering on research and development of agents that are addressed by existing BWC and Chemical Weapons Convention (CWC) proscriptions...
May 2017: Health Security
https://www.readbyqxmd.com/read/28573630/evaluation-of-medical-countermeasures-against-ebolaviruses-in-nonhuman-primate-models
#3
Chad E Mire, Thomas W Geisbert
Several ebolavirus species, with varying lethality rates, have caused sporadic outbreaks in Africa resulting in human disease. Ebolaviruses also have the potential for use as biological weapons. Currently, there are no licensed vaccines or therapeutics to respond to outbreaks or deliberate misuse of ebolaviruses. Vaccine or therapeutic efficacy testing of medical countermeasures against ebolaviruses requires an animal model of disease; in vitro testing in cell culture cannot reproduce the complicated balance between host-pathogen interactions required for the ultimate licensure of a countermeasure...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28572256/mutational-signatures-in-breast-cancer-the-problem-at-the-dna-level
#4
EDITORIAL
Serena Nik-Zainal, Sandro Morganella
A breast cancer genome is a record of the historic mutagenic activity that has occurred throughout the development of the tumor. Indeed, every mutation may be informative. Although driver mutations were the main focus of cancer research for a long time, passenger mutational signatures, the imprints of DNA damage and DNA repair processes that have been operative during tumorigenesis, are also biologically illuminating. This review is a chronicle of how the concept of mutational signatures arose and brings the reader up-to-date on this field, particularly in breast cancer...
June 1, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28569332/mixed-cu-i-au-i-coordination-polymers-as-reversible-turn-on-vapoluminescent-sensors-for-volatile-thioethers
#5
Bryton R Varju, Jeffrey S Ovens, Daniel B Leznoff
Vapour-phase thioethers play an important role in a wide number of fields, including plant biology, chemical weapon disposal, and brewing but few sensor materials are known. The emissive coordination polymer Cu1/2Au1/2CN does not react with vapour phase dimethyl sulphide (DMS) or diethyl sulphide (DES) despite the independent synthesis of emissive [Cu1/2Au1/2CN]2(DMS) and [Cu1/2Au1/2CN]2(DES) from their constituent components in solution. However, the doped Cu2/3Au1/3CN rapidly reacts in the solid state with both of these vapour phase thioethers reversibly, with a change in emission from 380/560 nm to 460 nm (DMS) or 420 nm (DES), illustrating that doping the inactive parent Cu1/2Au1/2CN with Cu(i) generates an active sensor material...
June 1, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28534691/financial-woes-spell-trouble-for-the-biological-weapons-convention
#6
Kathryn Millett
No abstract text is available yet for this article.
May 2017: Health Security
https://www.readbyqxmd.com/read/28497737/-phage-therapy-a-realistic-weapon-against-multidrug-resistant-bacteria
#7
Nicolas Dufour, Laurent Debarbieux
The continuous increase in antibiotic resistance among bacteria in infectious diseases associated with the lack of new antibiotics able to circumvent them are urging physicians, researchers and politicians to look for others options for treatments. Among those, phage therapy (use of natural viruses that infect bacteria, called bacteriophages) is one of the most promising approaches. In this review, we first focus on the problematic raised by multidrug resistant bacteria before addressing the main biological characteristics of bacteriophages, as well as the credibility and the relevance of phage therapy...
April 2017: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/28495766/ten-genome-sequences-of-human-and-livestock-isolates-of-bacillus-anthracis-from-the-country-of-georgia
#8
Ekaterine Khmaladze, Giorgi Dzavashvili, Gvantsa Chanturia, Mikeljon P Nikolich, Patrick S G Chain, Shannon L Johnson, Paata Imnadze
Bacillus anthracis causes the acute fatal disease anthrax, is a proven biological weapon, and is endemic in Georgia, where human and animal cases are reported annually. Here, we present whole-genome sequences of 10 historical B. anthracis strains from Georgia.
May 11, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28493905/melioidosis-clinical-impact-and-public-health-threat-in-the-tropics
#9
REVIEW
Ramar Perumal Samy, Bradley G Stiles, Gautam Sethi, Lina H K Lim
This review briefly summarizes the geographical distribution and clinical impact of melioidosis, especially in the tropics. Burkholderia pseudomallei (a gram-negative bacterium) is the major causative agent for melioidosis, which is prevalent in Singapore, Malaysia, Thailand, Vietnam, and Northern Australia. Melioidosis patients are increasingly being recognized in other parts of the world. The bacteria are intrinsically resistant to many antimicrobial agents, but prolonged treatment, especially with combinations of antibiotics, may be effective...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28452296/forensic-approaches-to-detect-possible-agents-of-bioterror
#10
Alfredo A González, Jessica I Rivera-Pérez, Gary A Toranzos
Many biological agents have been strategic pathogenic agents throughout history. Some have even changed history as a consequence of early discoveries of their use as weapons of war. Many of these bioagents can be easily isolated from the environment, and some have recently been genetically manipulated to become more pathogenic for biowarfare. However, it is difficult to determine accidental outbreaks of disease from intentional exposures. In this review, we examine how molecular tools have been used in combination with forensic research to resolve cases of unusual outbreaks and trace the source of the biocrime...
April 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28442608/unexpected-relations-of-historical-anthrax-strain
#11
M H Antwerpen, J W Sahl, D Birdsell, T Pearson, M J Pearce, C Redmond, H Meyer, P S Keim
In 1998, it was claimed that an 80-year-old glass tube intentionally filled with Bacillus anthracis and embedded in a sugar lump as a WWI biological weapon still contained viable spores. Today, genome sequencing of three colonies isolated in 1998 and subjected to phylogenetic analysis surprisingly identified a well-known B. anthracis reference strain isolated in the United States in 1981, pointing to accidental laboratory contamination.IMPORTANCE Next-generation sequencing and subsequent phylogenetic analyses are useful and reliable tools for the classification of recent and historical samples...
April 25, 2017: MBio
https://www.readbyqxmd.com/read/28398677/preparing-for-biological-threats-addressing-the-needs-of-pregnant-women
#12
REVIEW
Amelia K Watson, Sascha Ellington, Christina Nelson, Tracee Treadwell, Denise J Jamieson, Dana M Meaney-Delman
Intentional release of infectious agents and biological weapons to cause illness and death has the potential to greatly impact pregnant women and their fetuses. We review what is known about the maternal and fetal effects of seven biological threats: Bacillus anthracis (anthrax); variola virus (smallpox); Clostridium botulinum toxin (botulism); Burkholderia mallei (glanders) and Burkholderia pseudomallei (melioidosis); Yersinia pestis (plague); Francisella tularensis (tularemia); and Rickettsia prowazekii (typhus)...
March 15, 2017: Birth defects research
https://www.readbyqxmd.com/read/28388218/the-department-of-defense-chemical-and-biological-defense-program-an-enabler-of-the-third-offset-strategy
#13
Jason Roos, Calvin Chue, Diane DiEuliis, Peter Emanuel
The US Department of Defense (DOD) established programs to defend against chemical and biological weapons 100 years ago because military leaders understood that the operational capability of the US military is diminished when service member health is compromised. These threats to operational readiness can be from an overt attack using chemical and biological threats but may also arise from natural exposures. In the current era of rapidly emerging technologies, adversaries are not only rediscovering chemical and biological weapons; they are also displaying an increased propensity to employ them to cause strategic instability among deployed forces or nations undergoing conflict...
March 2017: Health Security
https://www.readbyqxmd.com/read/28384583/effect-of-water-table-variations-and-input-of-natural-organic-matter-on-the-cycles-of-c-and-n-and-mobility-of-as-zn-and-cu-from-a-soil-impacted-by-the-burning-of-chemical-warfare-agents-a-mesocosm-study
#14
Hugues Thouin, Fabienne Battaglia-Brunet, Pascale Gautret, Lydie Le Forestier, Dominique Breeze, Fabienne Séby, Marie-Paule Norini, Sebastien Dupraz
A mesocosm study was conducted to assess the impact of water saturation episodes and of the input of bioavailable organic matter on the biogeochemical cycles of C and N, and on the behavior of metal(loid)s in a soil highly contaminated by the destruction of arsenical shells. An instrumented mesocosm was filled with contaminated soil taken from the "Place-à-Gaz" site. Four cycles of dry and wet periods of about one month were simulated for 276days. After two dry/wet cycles, organic litter sampled on the site was added above the topsoil...
October 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28292727/analysis-of-dna-from-post-blast-pipe-bomb-fragments-for-identification-and-determination-of-ancestry
#15
Esiri Tasker, Bobby LaRue, Charity Beherec, David Gangitano, Sheree Hughes-Stamm
Improvised explosive devices (IEDs) such as pipe bombs are weapons used to detrimentally affect people and communities. A readily accessible brand of exploding targets called Tannerite® has been identified as a potential material for abuse as an explosive in pipe bombs. The ability to recover and genotype DNA from such weapons may be vital in the effort to identify suspects associated with these devices. While it is possible to recover DNA from post-blast fragments using short tandem repeat markers (STRs), genotyping success can be negatively affected by low quantities of DNA, degradation, and/or PCR inhibitors...
March 1, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28291503/regenerative-and-antibacterial-properties-of-acellular-fish-skin-grafts-and-human-amnion-chorion-membrane-implications-for-tissue-preservation-in-combat-casualty-care
#16
Skuli Magnusson, Baldur Tumi Baldursson, Hilmar Kjartansson, Ottar Rolfsson, Gudmundur Fertram Sigurjonsson
BACKGROUND: Improvised explosive devices and new directed energy weapons are changing warfare injuries from penetrating wounds to large surface area thermal and blast injuries. Acellular fish skin is used for tissue repair and during manufacturing subjected to gentle processing compared to biologic materials derived from mammals. This is due to the absence of viral and prion disease transmission risk, preserving natural structure and composition of the fish skin graft. OBJECTIVES: The aim of this study was to assess properties of acellular fish skin relevant for severe battlefield injuries and to compare those properties with those of dehydrated human amnion/chorion membrane...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28271909/challenges-in-searching-for-therapeutics-against-botulinum-neurotoxins
#17
REVIEW
Marco Pirazzini, Ornella Rossetto
Botulinum neurotoxins (BoNTs) are the most potent toxins known. BoNTs are responsible for botulism, a deadly neuroparalytic syndrome caused by the inactivation of neurotransmitter release at peripheral nerve terminals. Thanks to their specificity and potency, BoNTs are both considered potential bio-weapons and therapeutics of choice for a variety of medical syndromes. Several variants of BoNTs have been identified with individual biological properties and little antigenic relation. This expands greatly the potential of BoNTs as therapeutics but poses a major safety problem, increasing the need for finding appropriate antidotes...
May 2017: Expert Opinion on Drug Discovery
https://www.readbyqxmd.com/read/28263059/postexposure-recovery-and-analysis-of-biological-agent-in-a-simulated-biothreat-scenario-using-tandem-mass-spectrometry
#18
Sakshi Rajoria, Ravi Bhushan Kumar, Pallavi Gupta, Syed Imteyaz Alam
Some pathogens and toxins have the potential to be used as weapons of mass destruction and instigate population-based fear. Rapid, sensitive, and unambiguous identification of biothreat agents is of paramount importance for confirmation of the event and to mitigate the direct and indirect damages to public health and resources. Although there are several potential dissemination scenarios to describe an attack with a biological weapon, artificially generated bioaerosol is of the greatest concern from a bioterrorism or warfare perspective, potentially capable of causing mass destruction to a civilian or military population by inhalation of toxic bioaerosol...
March 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28250257/clinical-study-of-new-tetravalent-type-a-b-e-and-f-botulinum-toxoid-vaccine-derived-from-m-toxin-in-japan
#19
Yasushi Torii, Nakaba Sugimoto, Tomoko Kohda, Shunji Kozaki, Kazunori Morokuma, Yoshikane Horikawa, Akihiro Ginnaga, Akihiko Yamamoto, Motohide Takahashi
Botulinum toxin is most poisonous substance, and it is thought to be a high risk of it being used as a biological weapon; researchers of the toxin are exposed to such a hazard. Botulinum toxoid vaccines have been produced and used in Japan.  However, clinical studies using these vaccines were conducted before establishment of the Ethical Guidelines for Clinical Research in Japan, and their immunogenicity and safety using a systematic approach were not assessed. In this study, we produced new tetravalent (type A, B, E, and F) botulinum toxoid vaccine, the first derived from M toxin in the world, and conducted quality control tests with reference to the minimum requirements in Japan for adsorbed tetanus toxoid vaccine...
February 28, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28242227/insects-arachnids-and-centipedes-venom-a-powerful-weapon-against-bacteria-a-literature-review
#20
REVIEW
Filippo Fratini, Giovanni Cilia, Barbara Turchi, Antonio Felicioli
Currently, new antimicrobial molecules extracted or obtained by natural sources, could be a valide alternative to traditional antibiotics. Most of these molecules are represented by antimicrobial peptides (AMPs), which are essential compounds of insect, arachnids and centipedes venom. AMPs, due to their strong effectiveness, low resistance rates and peculiar mode of action, seem to have all the suitable features to be a powerful weapon against several bacteria, especially considering the increasing antibiotic-resistance phenomena...
May 2017: Toxicon: Official Journal of the International Society on Toxinology
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