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https://www.readbyqxmd.com/read/28931691/vertical-transmission-of-hepatitis-c-virus-variable-transmission-bottleneck-and-evidence-of-mid-gestation-in-utero-infection
#1
Sébastien Fauteux-Daniel, Ariane Larouche, Virginie Calderon, Jonathan Boulais, Chanel Béland, Doris G Ransy, Marc Boucher, Valérie Lamarre, Normand Lapointe, Isabelle Boucoiran, Armelle Le Campion, Hugo Soudeyns
Hepatitis C virus (HCV) can be transmitted from mother to child during pregnancy and childbirth. However, the timing and precise biologic mechanisms that are involved in this process are incompletely understood, as are the determinants that influence transmission of particular HCV variants. Here we report results of a longitudinal assessment of HCV quasispecies diversity and composition in 5 cases of vertical HCV transmission, including 3 women coinfected with HIV-1. The population structure of HCV variant spectra based on E2 envelope gene sequences (nucleotide positions 1491-1787), including hypervariable regions 1 and 2, was characterized using next-generation sequencing and median joining network analysis...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28929273/complete-genome-sequence-of-a-novel-lytic-bacteriophage-isolated-from-ralstonia-solanacearum
#2
Jingfang Su, Hongwei Sun, Junjie Liu, Zhaokui Guo, Guoquan Fan, Gang Gu, Guanghua Wang
A lytic podophage RSPI1 was isolated from tobacco field soil collected in Fujian Province, South China using host bacterium Ralstonia solanacearum Tb15-14. Whole genome sequencing of this phage was performed using the high-throughput Ion Torrent PGM Sequencer. The complete genome of RSPI1 was 43,211 bp in length with a mean DNA G + C content of 61.5%. A total of 48 open reading frames were identified with lengths ranging from 132 bp to 5,061 bp, of which, 11, 12 and 25 were identified as functional, structural and unknown genes, respectively...
September 19, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28919551/identification-of-potential-antigens-from-non-classically-secreted-proteins-and-designing-novel-multitope-peptide-vaccine-candidate-against-brucella-melitensis-through-reverse-vaccinology-and-immunoinformatics-approach
#3
Udayakumar S Vishnu, Jagadesan Sankarasubramanian, Paramasamy Gunasekaran, Jeyaprakash Rajendhran
Brucella melitensis is an intracellular pathogen resides in the professional and non-professional phagocytes of the host, causing zoonotic disease brucellosis. The stealthy nature of the Brucella makes it's highly pathogenic, and it is hard to eliminate the bacteria completely from the infected host. Hitherto, no licensed vaccines are available for human brucellosis. In this study, we identified potential antigens for vaccine development from non-classically secreted proteins through reverse vaccinology approach...
September 14, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28916655/tethering-il2-to-its-receptor-il2r%C3%AE-enhances-anti-tumor-activity-and-expansion-of-natural-killer-nk92-cells
#4
Youssef Jounaidi, Joseph F Cotten, Keith W Miller, Stuart A Forman
Interleukin-2 (IL2) is an immunostimulatory cytokine for key immune cells including T cells and natural killer (NK) cells. Systemic IL2 supplementation could enhance NK-mediated immunity in a variety of diseases ranging from neoplasms to viral infection. However, its systemic use is restricted by its serious side effects and limited efficacy due to activation of T regulatory cells (Tregs). IL2 signaling is mediated through interactions with a multi-subunit receptor complex containing IL2Rα, IL2Rβ and IL2Rγ...
September 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28903000/structural-revision-of-baulamycin-a-and-structure-activity-relationships-of-baulamycin-a-derivatives
#5
Sandip Sengupta, Munhyung Bae, Dong-Chan Oh, Uttam Dash, Hak Joong Kim, Woon Young Song, Injae Shin, Taebo Sim
Total synthesis of the proposed structure of baulamycin A was performed. The spectral properties of the synthetic compound differ from those reported for the natural product. On the basis of comprehensive NMR study, we proposed two other possible structures for natural baulamycin A. Total syntheses of these two substances were performed, which enabled assignment of the correct structure of baulamycin A. Key features of the convergent and fully stereo-controlled route include Evans Aldol and Brown allylation reactions to construct the left fragment, a prolinol amide-derived alkylation/desymmetrization to install the methyl substituted centers in the right fragment, and finally a Carreira alkynylation to join both fragments...
September 13, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28859344/viruses-in-the-21st-century-from-the-curiosity-driven-discovery-of-giant-viruses-to-new-concepts-and-definition-of-life
#6
Patrick Forterre
The curiosity-driven discovery of giant DNA viruses infecting amoebas has triggered an intense debate about the origin, nature, and definition of viruses. This discovery was delayed by the current paradigm confusing viruses with small virions. Several new definitions and concepts have been proposed either to reconcile the unique features of giant viruses with previous paradigms or to propose a completely new vision of the living world. I briefly review here how several other lines of research in virology converged during the last 2 decades with the discovery of giant viruses to change our traditional perception of the viral world...
August 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28855246/localisation-of-double-strand-break-repair-proteins-to-viral-replication-compartments-following-lytic-reactivation-of-kshv
#7
Robert Hollingworth, Richard D Horniblow, Calum Forrest, Grant S Stewart, Roger J Grand
Double-strand breaks (DSBs) in DNA are recognised by the Ku70/80 heterodimer and the MRE11-RAD50-NBS1 (MRN) complex and result in activation of the DNA-PK and ATM kinases that play key roles in regulating the cellular DNA damage response (DDR). DNA tumour viruses such as Kaposi's sarcoma-associated herpesvirus (KSHV) are known to interact extensively with the DDR during the course of their replicative cycles. Here we show that during lytic amplification of KSHV DNA, the Ku70/80 heterodimer and the MRN complex consistently co-localise with viral genomes in replication compartments (RCs) whereas other DSB repair proteins form foci outside of RCs...
August 30, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28842931/changes-in-intestinal-microbiota-and-their-effects-on-allogeneic-stem-cell-transplantation
#8
REVIEW
Rory M Shallis, Christopher M Terry, Seah H Lim
The human intestinal microbiota is essential for microbial homeostasis, regulation of metabolism, and intestinal immune tolerance. Rapidly evolving understanding of the importance of the microbiota implicates changes in the composition and function of intestinal microbial communities in an assortment of systemic conditions. Complications following allogeneic stem cell transplant now join the ever-expanding list of pathologic states regulated by intestinal microbiota. Dysbiosis, or disruption of the normal ecology of this microbiome, has been directly implicated in the pathogenesis of entities such as Clostridium difficile infections, graft-versus-host disease, and most recently disease relapse, all of which are major causes of morbidity and mortality in patients undergoing allogeneic stem cell transplant...
August 26, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28835065/-review-of-the-major-work-and-challenge-of-emergency-medical-rescue-from-gas-explosion-accident-in-hangzhou
#9
Q Zhang
In order to ameliorate the prognosis of patients in burn disaster, national emergency medical rescue expert teams are usually dispatched to incident areas. This article discusses the major work and challenges of the medical rescue expert teams using example of rescuing gas explosion accident in Hangzhou in last few days and author's personal experience of previous mission. The foremost mission of medical rescue expert teams is to provide feasible strategic advice for burn disaster rescue and pivotal critical care support...
August 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28820730/knowledge-of-hepatitis-b-virus-infection-and-its-control-practices-among-dental-students-in-an-indian-city
#10
Vishal Khandelwal, Sushma Khandelwal, Neetu Gupta, Ullal Anand Nayak, Namrata Kulshreshtha, Sudhindra Baliga
Background Hepatitis B virus infection is a general cause of chronic hepatitis, liver cirrhosis and hepato-cellular carcinoma worldwide. It is highly contagious. It is an important reason for morbidity and mortality in the Indian population. Oral health professionals are at the highest risk. Vaccination for hepatitis B can prevent this deadly disease. Methods The present study was designed to evaluate the degree of awareness, knowledge of hepatitis B infection and status of hepatitis B vaccination among dental students...
August 18, 2017: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/28820346/attitudes-and-potential-barriers-towards-hepatitis-c-treatment-in-patients-with-and-without-hiv-coinfection
#11
P R Allyn, S M O'Malley, J Ferguson, C H Tseng, K W Chew, D Bhattacharya
This study aimed to assess attitudes and potential barriers towards treatment in patients with hepatitis C virus (HCV) infection, comparing those with and without HIV coinfection. A cross-sectional survey of 82 HCV-infected adults with and without HIV was conducted in greater Los Angeles between November 2013 and July 2015. Overall, there were 53 (64.6%) with HIV coinfection, 20 (25.0%) with self-reported cirrhosis, and 22 (26.8%) with a history of prior HCV treatment. Of all, 93.2% wanted HCV treatment, but 45...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28818750/whole-genome-sequence-phylogenetic-analysis-of-four-mexican-rabies-viruses-isolated-from-cattle
#12
I Bárcenas-Reyes, E Loza-Rubio, G J Cantó-Alarcón, J Luna-Cozar, A Enríquez-Vázquez, R J Barrón-Rodríguez, F Milián-Suazo
Phylogenetic analysis of the rabies virus in molecular epidemiology has been traditionally performed on partial sequences of the genome, such as the N, G, and P genes; however, that approach raises concerns about the discriminatory power compared to whole genome sequencing. In this study we characterized four strains of the rabies virus isolated from cattle in Querétaro, Mexico by comparing the whole genome sequence to that of strains from the American, European and Asian continents. Four cattle brain samples positive to rabies and characterized as AgV11, genotype 1, were used in the study...
August 4, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28808685/structure-of-a-1-5-mda-adhesin-that-binds-its-antarctic-bacterium-to-diatoms-and-ice
#13
Shuaiqi Guo, Corey A Stevens, Tyler D R Vance, Luuk L C Olijve, Laurie A Graham, Robert L Campbell, Saeed R Yazdi, Carlos Escobedo, Maya Bar-Dolev, Victor Yashunsky, Ido Braslavsky, David N Langelaan, Steven P Smith, John S Allingham, Ilja K Voets, Peter L Davies
Bacterial adhesins are modular cell-surface proteins that mediate adherence to other cells, surfaces, and ligands. The Antarctic bacterium Marinomonas primoryensis uses a 1.5-MDa adhesin comprising over 130 domains to position it on ice at the top of the water column for better access to oxygen and nutrients. We have reconstructed this 0.6-μm-long adhesin using a "dissect and build" structural biology approach and have established complementary roles for its five distinct regions. Domains in region I (RI) tether the adhesin to the type I secretion machinery in the periplasm of the bacterium and pass it through the outer membrane...
August 2017: Science Advances
https://www.readbyqxmd.com/read/28790200/chromosome-end-repair-and-genome-stability-in-plasmodium-falciparum
#14
Susannah F Calhoun, Jake Reed, Noah Alexander, Christopher E Mason, Kirk W Deitsch, Laura A Kirkman
The human malaria parasite Plasmodium falciparum replicates within circulating red blood cells, where it is subjected to conditions that frequently cause DNA damage. The repair of DNA double-stranded breaks (DSBs) is thought to rely almost exclusively on homologous recombination (HR), due to a lack of efficient nonhomologous end joining. However, given that the parasite is haploid during this stage of its life cycle, the mechanisms involved in maintaining genome stability are poorly understood. Of particular interest are the subtelomeric regions of the chromosomes, which contain the majority of the multicopy variant antigen-encoding genes responsible for virulence and disease severity...
August 8, 2017: MBio
https://www.readbyqxmd.com/read/28780738/john-p-craig-md-mph-physician-scientist-educator-and-mentor-1923-2016
#15
M A Haseeb, Pascal James Imperato
John P. Craig (1923-2016) was an eminent physician-scientist, gifted educator, and greatly valued mentor. Born in West Liberty, Ohio on 29 November 1923, he attended Oberlin College, and received his medical degree from Case Western Reserve University, School of Medicine. This was followed by an internship at Yale University Medical Center, and then service in the U.S. Army during the Korean War. He was a battalion surgeon, preventive medicine officer, and epidemiologist. While in Korea, he conducted important investigations of hemorrhagic fever among American troops...
August 5, 2017: Journal of Community Health
https://www.readbyqxmd.com/read/28768904/mapping-the-clinical-outcomes-and-genetic-evolution-of-ebola-virus-in-sierra-leone
#16
Tao Li, Hong-Wu Yao, Di Liu, Hong-Guang Ren, Yi Hu, David Kargbo, Yue Teng, Yong-Qiang Deng, Hui-Jun Lu, Xiong Liu, Kun Liu, Li-Qun Fang, Nian-Zhi Ning, Gary Wong, Foday Dafae, Abdul Kamara, AiPing Wu, Tai-Jiao Jiang, Zhan Li, Jie Huang, Yu Sun, Jun Qian, Brima Kargbo, Jia-Fu Jiang, Hui Wang, Wu-Chun Cao
Sierra Leone was the most severely affected country in Western Africa during the 2013-2016 outbreak of Ebola virus disease (EVD). Previous genome surveillance studies have revealed the origin, diversity, and evolutionary dynamics of the Ebola virus (EBOV); however, the information regarding EBOV sequences is insufficient, especially the clinical outcomes, given that the correlation between the clinical outcomes and the genetic evolution of EBOV is still not clear. Here, we collected and curated a comprehensive data set that includes 514 EBOV genome sequences from patients with confirmed EVD (including 60 sequences not previously studied), >87...
August 3, 2017: JCI Insight
https://www.readbyqxmd.com/read/28744024/recent-increased-identification-and-transmission-of-hiv-1-unique-recombinant-forms-in-sweden
#17
Ujjwal Neogi, Abu Bakar Siddik, Prabhav Kalaghatgi, Magnus Gisslén, Göran Bratt, Gaetano Marrone, Anders Sönnerborg
A temporal increase in non-B subtypes has earlier been described in Sweden by us and we hypothesized that this increased viral heterogeneity may become a hotspot for the development of more complex and unique recombinant forms (URFs) if the epidemics converge. In the present study, we performed subtyping using four automated tools and phylogenetic analysis by RAxML of pol gene sequences (n = 5246) and HIV-1 near full-length genome (HIV-NFLG) sequences (n = 104). A CD4(+) T-cell decline trajectory algorithm was used to estimate time of HIV infection...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28738888/genetic-characterization-of-11-porcine-reproductive-and-respiratory-syndrome-virus-isolates-in-south-china-from-2014-to-2015
#18
Linyang Yu, Pandeng Zhao, Jianguo Dong, Yanling Liu, Leyi Zhang, Pengshuai Liang, Lei Wang, Changxu Song
BACKGROUND: Porcine reproductive and respiratory syndrome (PRRS) has leaded to an enormous loss per year to the swine industry, its etiology porcine reproductive and respiratory syndrome virus (PRRSV) is a highly mutated virus in pigs. To fully understand the genetic characteristics of PRRSV genome in South China, this study collected the lung samples infected with PRRSV in Guangdong and Hainan province from 2014 to 2015 and tried to isolate the PRRSV. Finally, the complete genomes of isolated strains were sequenced and analyzed...
July 24, 2017: Virology Journal
https://www.readbyqxmd.com/read/28736507/national-mortality-burden-due-to-communicable-non-communicable-and-other-diseases-in-ethiopia-1990-2015-findings-from-the-global-burden-of-disease-study-2015
#19
Awoke Misganaw, Tilahun N Haregu, Kebede Deribe, Gizachew Assefa Tessema, Amare Deribew, Yohannes Adama Melaku, Azmeraw T Amare, Semaw Ferede Abera, Molla Gedefaw, Muluken Dessalegn, Yihunie Lakew, Tolesa Bekele, Mesoud Mohammed, Biruck Desalegn Yirsaw, Solomon Abrha Damtew, Kristopher J Krohn, Tom Achoki, Jed Blore, Yibeltal Assefa, Mohsen Naghavi
BACKGROUND: Ethiopia lacks a complete vital registration system that would assist in measuring disease burden and risk factors. We used the Global Burden of Diseases, Injuries, and Risk Factors Study 2015 (GBD 2015) estimates to describe the mortality burden from communicable, non-communicable, and other diseases in Ethiopia over the last 25 years. METHODS: GBD 2015 mainly used cause of death ensemble modeling to measure causes of death by age, sex, and year for 195 countries...
2017: Population Health Metrics
https://www.readbyqxmd.com/read/28732536/national-mortality-burden-due-to-communicable-non-communicable-and-other-diseases-in-ethiopia-1990-2015-findings-from-the-global-burden-of-disease-study-2015
#20
Awoke Misganaw, Tilahun N Haregu, Kebede Deribe, Gizachew Assefa Tessema, Amare Deribew, Yohannes Adama Melaku, Azmeraw T Amare, Semaw Ferede Abera, Molla Gedefaw, Muluken Dessalegn, Yihunie Lakew, Tolesa Bekele, Mesoud Mohammed, Biruck Desalegn Yirsaw, Solomon Abrha Damtew, Kristopher J Krohn, Tom Achoki, Jed Blore, Yibeltal Assefa, Mohsen Naghavi
BACKGROUND: Ethiopia lacks a complete vital registration system that would assist in measuring disease burden and risk factors. We used the Global Burden of Diseases, Injuries, and Risk Factors Study 2015 (GBD 2015) estimates to describe the mortality burden from communicable, non-communicable, and other diseases in Ethiopia over the last 25 years. METHODS: GBD 2015 mainly used cause of death ensemble modeling to measure causes of death by age, sex, and year for 195 countries...
July 21, 2017: Population Health Metrics
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