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https://www.readbyqxmd.com/read/28728309/escherichia-coli-outer-membrane-protein-f-ompf-an-immunogenic-protein-induces-cross-reactive-antibodies-against-escherichia-coli-and-shigella
#1
Xiao Wang, Da Teng, Qingfeng Guan, Ruoyu Mao, Ya Hao, Xiumin Wang, Junhu Yao, Jianhua Wang
Diarrhea caused by pathogenic Escherichia coli (E. coli) is one of the most serious infectious diseases in humans and animals. Due to antibiotics resistance and the lack of efficient vaccine, more attention should be paid to find potential versatile vaccine candidates to prevent diseases. In this study, the sequence homology analysis indicated that OmpF from E. coli CVCC 1515 shares a high identity (90-100%) with about half of the E. coli (46.7%) and Shigella (52.8%) strains. Then the recombinant OmpF was supposed to be developed as a versatile vaccine to prevent E...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28727999/drug-ion-co-delivery-multi-functional-nanocarrier-to-regenerate-infected-tissue-defect
#2
Jung-Hwan Lee, Ahmed El-Fiqi, Nandin Mandakhbayar, Hae-Hyoung Lee, Hae-Won Kim
Regeneration of infected tissues is a globally challenging issue in medicine and dentistry. Common clinical therapies involving a complete removal of infected areas together with a treatment of antimicrobial drugs are often suboptimal. Biomaterials with anti-bacterial and pro-regenerative potential can offer a solution to this. Here we design a novel nanocarrier based on a mesoporous silicate-calcium glass by doping with Ag ions and simultaneously loading antimicrobial drugs onto mesopores. The nanocarriers could controllably release multiple ions (silver, calcium, and silicate) and drugs (tetracycline or chlorohexidine) to levels therapeutically relevant, and effectively internalize to human dental stem cells (∼90%) with excellent viability, ultimately stimulating odontogenic differentiation...
July 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28727907/novel-role-of-surfactant-protein-a-in-bacterial-sinusitis
#3
George T Noutsios, Amanda L Willis, Julie G Ledford, Eugene H Chang
BACKGROUND: Chronic rhinosinusitis (CRS) is a common inflammatory disorder of the upper airway characterized by chronic inflammation and significant sinonasal remodeling. CRS is comprised of 2 major subgroups, based on whether polyps are present or absent. In some cases, it is characterized by colonization with opportunistic pathogens such as Pseudomonas aeruginosa (PA), Staphylococcus aureus, and other bacteria. The innate immune system of the sinonasal epithelium is the first line of defense against inhaled pathogens...
July 20, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28725638/isolation-of-f-novicida-containing-phagosome-from-infected-human-monocyte-derived-macrophages
#4
Valentina Marecic, Olga Shevchuk, Mateja Ozanic, Mirna Mihelcic, Michael Steinert, Antonija Jurak Begonja, Yousef Abu Kwaik, Marina Santic
Francisella is a gram-negative bacterial pathogen, which causes tularemia in humans and animals. A crucial step of Francisella infection is its invasion of macrophage cells. Biogenesis of the Francisella-containing phagosome (FCP) is arrested for ~15 min at the endosomal stage, followed by gradual bacterial escape into the cytosol, where the microbe proliferates. The crucial step in pathogenesis of tularemia is short and transient presence of the bacterium within phagosome. Isolation of FCPs for further studies has been challenging due to the short period of time of bacterial residence in it and the characteristics of the FCP...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28724443/metagenomics-of-urban-sewage-identifies-an-extensively-shared-antibiotic-resistome-in-china
#5
Jian-Qiang Su, Xin-Li An, Bing Li, Qing-Lin Chen, Michael R Gillings, Hong Chen, Tong Zhang, Yong-Guan Zhu
BACKGROUND: Antibiotic-resistant pathogens are challenging treatment of infections worldwide. Urban sewage is potentially a major conduit for dissemination of antibiotic resistance genes into various environmental compartments. However, the diversity and abundance of such genes in wastewater are not well known. METHODS: Here, seasonal and geographical distributions of antibiotic resistance genes and their host bacterial communities from Chinese urban sewage were characterized, using metagenomic analyses and 16S rRNA gene-based Illumina sequencing, respectively...
July 19, 2017: Microbiome
https://www.readbyqxmd.com/read/28723925/immunologic-response-to-vaccine-challenge-in-pregnant-ptpn22-r620w-carriers-and-non-carriers
#6
Shelly H Tien, Juliet N Crabtree, Heather L Gray, Erik J Peterson
OBJECTIVES: Influenza infection is a significant cause of respiratory morbidity among pregnant women. Seasonal influenza vaccination engages innate immune receptors to promote protective immunity. A coding polymorphism (R620W) in PTPN22 imparts elevated risk for human infection and autoimmune disease, predisposes to diminished innate immune responses, and associates with reduced immunization responses. We sought to quantify the effects of PTPN22-R620W on humoral and cell-mediated immune responses to the inactivated influenza vaccine among healthy pregnant women...
2017: PloS One
https://www.readbyqxmd.com/read/28722620/case-report-infectious-diseases-in-pilgrims-visiting-the-holy-land
#7
Orna Nitzan, Arnon Blum, Esther Marva, Adina Katz, Bat-Sheva Tzadok, Yaarit Nachum-Biala, Gad Baneth, Avi Peretz
Every year Christian pilgrims from around the world visit the holy sites located around the Sea of Galilee. Some become ill during their stay with infectious diseases that were acquired in their country of origin, and are hospitalized at Poriya Medical Center. They pose a diagnostic challenge due to language barriers, the rarity of these infections in Israel, and the fact that diagnostic tests are not readily available. All patient records from 2015 of Holy Land tourists hospitalized at Poriya Medical Center were screened for the diagnosis of imported zoonotic diseases that are not commonly diagnosed in Israel...
May 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722582/population-movement-as-a-risk-factor-for-malaria-infection-in-high-altitude-villages-of-tahtay-maychew-district-tigray-northern-ethiopia-a-case-ccontrol-study
#8
Mebrahtom Haile, Hailemariam Lemma, Yemane Weldu
Key goal and targets of the Ethiopian national malaria control strategy are to achieve malaria elimination within specific geographical areas with historically low malaria transmission and to reach near-zero malaria transmission in the remaining malarious areas by 2020. However, back and forth population movement between high-transmission and low-transmission area imposes challenge on the success of national malaria control programs. Therefore, examining the effect of human movement and identification of at-risk populations is crucial in an elimination setting...
June 19, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722241/mineralized-state-of-the-avian-influenza-virus-in-the-environment
#9
Hangyu Zhou, Guangchuan Wang, Xiaoyu Wang, Zhiyong Song, Ruikang Tang
Although the circulation of avian influenza in humans is limited, they can be transmitted from Aves to humans, representing a great challenge. Herein, we suggest that influenza viruses from Aves might exist in a mineralized state due to the high calcium concentrations in the avian intestine. Using two typical influenza viruses as examples, we demonstrate these viruses can self-mineralize in simulated avian intestinal fluid, resulting in egg-like virus-mineral structured composites. The mineralized viruses are more robust, with enhanced infectivity and thermostability...
July 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28722007/physical-properties-of-the-hiv-1-capsid-from-all-atom-molecular-dynamics-simulations
#10
Juan R Perilla, Klaus Schulten
Human immunodeficiency virus type 1 (HIV-1) infection is highly dependent on its capsid. The capsid is a large container, made of ∼1,300 proteins with altogether 4 million atoms. Although the capsid proteins are all identical, they nevertheless arrange themselves into a largely asymmetric structure made of hexamers and pentamers. The large number of degrees of freedom and lack of symmetry pose a challenge to studying the chemical details of the HIV capsid. Simulations of over 64 million atoms for over 1 μs allow us to conduct a comprehensive study of the chemical-physical properties of an empty HIV-1 capsid, including its electrostatics, vibrational and acoustic properties, and the effects of solvent (ions and water) on the capsid...
July 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28720444/characterization-of-a-spray-dried-candidate-hpv-l2-vlp-vaccine-stored-for-multiple-years-at-room-temperature
#11
Julianne Peabody, Pavan Muttil, Bryce Chackerian, Ebenezer Tumban
HPV infections are associated with human cancers. Although three prophylactic vaccines have been approved to protect against HPV infections, the vaccines require cold-chain storage and may not be suitable for third world countries with less developed refrigeration facilities. We previously developed a bacteriophage L2 virus-like particle (VLP)-based candidate vaccine, which elicited broadly protective antibodies against diverse HPV types. Spray-drying of MS2-16L2 VLPs into a dry powder enhanced the stability of these VLPs...
June 2017: Papillomavirus Research
https://www.readbyqxmd.com/read/28719613/visual-detection-of-brucella-in-bovine-biological-samples-using-dna-activated-gold-nanoparticles
#12
Dheeraj Pal, Nongthombam Boby, Satish Kumar, Gurpreet Kaur, Syed Atif Ali, Julien Reboud, Sameer Shrivastava, Praveen K Gupta, Jonathan M Cooper, Pallab Chaudhuri
Brucellosis is a bacterial disease, which, although affecting cattle primarily, has been associated with human infections, making its detection an important challenge. The existing gold standard diagnosis relies on the culture of bacteria which is a lengthy and costly process, taking up to 45 days. New technologies based on molecular diagnosis have been proposed, either through dip-stick, immunological assays, which have limited specificity, or using nucleic acid tests, which enable to identify the pathogen, but are impractical for use in the field, where most of the reservoir cases are located...
2017: PloS One
https://www.readbyqxmd.com/read/28719322/case-report-disseminated-talaromyces-penicillium-marneffei-and-mycobacterium-tuberculosis-coinfection-in-a-japanese-patient-with-acquired-immunodeficiency-syndrome
#13
Shuji Hatakeyama, Takeshi Yamashita, Toshiyasu Sakai, Katsuhiko Kamei
Talaromyces marneffei is a dimorphic fungus endemic mainly in southeast and south Asia. It causes severe mycosis, usually in immunocompromised individuals, such as those with human immunodeficiency virus (HIV) infection. Concomitant infection with T. marneffei and other opportunistic pathogens is plausible because the majority of T. marneffei infections occur in patients with advanced HIV infection. Nonetheless, coinfection in the same site has rarely been reported, and poses a considerable diagnostic and therapeutic challenge...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719288/evaluation-of-the-protective-effect-of-deoxyribonucleic-acid-vaccines-encoding-granule-antigen-2-and-5-against-acute-toxoplasmosis-in-balb-c-mice
#14
Xiao Teng Ching, Mun Yik Fong, Yee Ling Lau
AbstractToxoplasma gondii infects a broad range of warm-blooded hosts, including humans. Important clinical manifestations include encephalitis in immunocompromised patients as well as miscarriage and fetal damage during early pregnancy. Toxoplasma gondii dense granule antigen 2 and 5 (GRA2 and GRA5) are essential for parasitophorous vacuole development of the parasite. To evaluate the potential of GRA2 and GRA5 as recombinant DNA vaccine candidates, these antigens were cloned into eukaryotic expression vector (pcDNA 3...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719275/high-triatoma-brasiliensis-densities-and-trypanosoma-cruzi-prevalence-in-domestic-and-peridomestic-habitats-in-the-state-of-rio-grande-do-norte-brazil-the-source-for-chagas-disease-outbreaks
#15
Mauricio Lilioso, Elaine Folly-Ramos, Fabiana Lopes Rocha, Jorge Rabinovich, Claire Capdevielle-Dulac, Myriam Harry, Paula L Marcet, Jane Costa, Carlos Eduardo Almeida
AbstractA total of 2,431 Triatoma brasiliensis were collected from 39 populations of Paraíba (PB) and Rio Grande do Norte (RN) states, Brazil. In PB, Trypanosoma cruzi infection was not detected in either peridomestic or domestic vector populations. In contrast, in RN, T. brasiliensis was detected with high parasite prevalence in these ecotopes (30.7-40.0%). Moreover, peridomicile insect population densities were more than double the average densities of all other settings evaluated (19.17 versus < 8.94 triatomine/man-hour)...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718801/from-variation-of-influenza-viral-proteins-to-vaccine-development
#16
REVIEW
Wandi Zhu, Chao Wang, Bao-Zhong Wang
Recurrent influenza epidemics and occasional pandemics are one of the most important global public health concerns and are major causes of human morbidity and mortality. Influenza viruses can evolve through antigen drift and shift to overcome the barriers of human immunity, leading to host adaption and transmission. Mechanisms underlying this viral evolution are gradually being elucidated. Vaccination is an effective method for the prevention of influenza virus infection. However, the emergence of novel viruses, including the 2009 pandemic influenza A (H1N1), the avian influenza A virus (H7N9), and the highly pathogenic avian influenza A virus (HPAI H5N1), that have infected human populations frequently in recent years reveals the tremendous challenges to the current influenza vaccine strategy...
July 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28718408/a-common-clinical-dilemma-management-of-persistent-hrhpv-infection
#17
Yifan Meng, Ding Ma, Peng Wu
Persistent infection with high-risk human papillomavirus (hrHPV) is a key step in the development of cervical cancer. However, making clinical decisions about how to deal with these cases has become a challenge for obstetrics and gynecology (Ob/Gyn) practitioners. Here, we review the latest research findings and propose possible solutions for the management of persistent hrHPV infections.
May 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28717958/-the-8th-edition-of-the-ajcc-cancer-staging-manual-updates-in-otorhinolaryngology-head-and-neck-surgery
#18
REVIEW
J Doescher, J A Veit, T K Hoffmann
BACKGROUND: The TNM system is an established tool for classification of solid tumors by means of tumor size and extent, the involvement of local lymph nodes, and the presence of distant metastases. The classification was established in order to visualize prognostic implications and to allow establishment of systematic therapeutic algorithms. Since the beginning of 2017 a revised version of the classification has applied. Particularly the classification of otorhinolaryngologic tumors has been thoroughly revised in the 8th edition, partly on the basis of new prognostically relevant parameters, such as infection with oncogenic human papillomavirus (HPV) subtypes...
July 17, 2017: HNO
https://www.readbyqxmd.com/read/28717029/the-metabolite-transporter-peg344-is-required-for-the-full-virulence-of-the-hypervirulent-klebsiella-pneumoniae-strain-hvkp1-after-pulmonary-but-not-subcutaneous-challenge
#19
Jeffrey Bulger, Ulrike MacDonald, Ruth Olson, Janet Beanan, Thomas A Russo
Hypervirulent Klebsiella pneumoniae (hvKP) is an emerging pathotype that is capable of causing tissue-invasive, organ and life threatening infections in healthy individuals from the community. Knowledge on the virulence factors specific to hvKP is limited. In this report we describe a new factor (PEG344) that increases the virulence of the hvKP strain hvKP1. peg344 is present on the hvKP1 virulence plasmid, is broadly prevalent among hvKP strains, and has increased RNA abundance when grown in human ascites...
July 17, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28716893/which-dengue-vaccine-approach-is-the-most-promising-and-should-we-be-concerned-about-enhanced-disease-after-vaccination-there-is-only-one-true-winner
#20
Scott B Halstead
The scientific community now possesses information obtained directly from human beings that makes it possible to understand why breakthrough-enhanced dengue virus (DENV) infections occurred in children receiving Sanofi Pasteur's Dengvaxia tetravalent live attenuated vaccine and to predict the possibility of breakthrough-enhanced DENV infections following immunization with two other tetravalent live attenuated vaccines now in phase III testing. Based upon recent research, Dengvaxia, lacking DENV nonstructural protein antigens, did not protect seronegatives because it failed to raise a competent T-cell response and/or antibodies to NS1...
July 17, 2017: Cold Spring Harbor Perspectives in Biology
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