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https://www.readbyqxmd.com/read/28636257/covalent-attachment-and-pro-pro-endopeptidase-ppep-1-mediated-release-of-clostridium-difficile-cell-surface-proteins-involved-in-adhesion
#1
REVIEW
Jeroen Corver, Valentina Cordo', Hans C van Leeuwen, Oleg I Klychnikov, Paul J Hensbergen
In the past decade, Clostridium difficile has emerged as an important gut pathogen. This anaerobic, Gram-positive bacterium is the main cause of infectious nosocomial diarrhea. Whereas much is known about the mechanism through which the C. difficile toxins cause diarrhea, relatively little is known about the dynamics of adhesion and motility, which is mediated by cell surface proteins. This review will discuss the recent advances in our understanding of the sortase-mediated covalent attachment of cell surface (adhesion) proteins to the peptidoglycan layer of C...
June 21, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28635671/rab33b-controls-hepatitis-b-virus-assembly-by-regulating-core-membrane-association-and-nucleocapsid-processing
#2
Christina Bartusch, Tatjana Döring, Reinhild Prange
Many viruses take advantage of cellular trafficking machineries to assemble and release new infectious particles. Using RNA interference (RNAi), we demonstrate that the Golgi/autophagosome-associated Rab33B is required for hepatitis B virus (HBV) propagation in hepatoma cell lines. While Rab33B is dispensable for the secretion of HBV subviral envelope particles, its knockdown reduced the virus yield to 20% and inhibited nucleocapsid (NC) formation and/or NC trafficking. The overexpression of a GDP-restricted Rab33B mutant phenocopied the effect of deficit Rab33B, indicating that Rab33B-specific effector proteins may be involved...
June 21, 2017: Viruses
https://www.readbyqxmd.com/read/28635592/type-specific-l1-virus-like-particle-mediated-protection-of-horses-from-experimental-bovine-papillomavirus-1-induced-pseudo-sarcoid-formation-is-long-lasting
#3
Julia Harnacker, Edmund K Hainisch, Saeed Shafti-Keramat, Reinhard Kirnbauer, Sabine Brandt
Equine sarcoids are common therapy-resistant skin tumours induced by bovine papillomavirus type 1 or 2 (BPV1, BPV2) infection. We have previously shown that prophylactic vaccination with BPV1 L1 virus-like particles (VLPs) efficiently protects horses from experimental BPV1-induced pseudo-sarcoid development. Here, we assessed BPV1 L1 VLP vaccine-mediated long-term protection from experimental tumour formation in seven horses 5 years after immunization with three different doses of BPV1 L1 VLPs, and three unvaccinated control animals...
June 21, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28634591/examination-of-the-microbial-spectrum-in-the-etiology-of-erythema-nodosum-a-retrospective-descriptive-study
#4
Ozlem Ozbagcivan, Sevgi Akarsu, Ceylan Avci, Burcu Bahar Inci, Emel Fetil
Even though infections are the most common cause of erythema nodosum (EN), only certain microorganisms take the great interest such as streptococci in knowledge. Our aim was to examine the frequency and type of infections in EN, to determine the characteristics of patients with an infectious etiology, and to discuss the role of these microbes in EN pathology in the context of their interactions with humans. Charts of 81 patients with EN who were seen between 2003 and 2017 were retrospectively reviewed. Identified etiological factors were classified into three groups: infectious, noninfectious, and idiopathic...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28634408/a-tightly-regulated-il-22-response-maintains-immune-functions-and-homeostasis-in-systemic-viral-infection
#5
Panpan Yi, Yuejin Liang, Denley Ming Kee Yuan, Zuliang Jie, Zakari Kwota, Yan Chen, Yingzi Cong, Xuegong Fan, Jiaren Sun
Interleukin-22 (IL-22) plays an important role in host immunity and tissue homeostasis in infectious and inflammatory diseases. However, the function and regulation of IL-22 in viral infection remain largely unknown. Here, we report that viral infection triggered early IL-22 production from the liver and lymphoid organs. γδ T cells are the main immune cells to produce IL-22 in the liver, a process mediated by the IL-23/phosphoinositide 3-kinase (PI3K)/mammalian target of rapamycin complex 1 (mTORC1) signaling pathway...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634370/microbial-antigens-stimulate-metalloprotease-7-secretion-in-human-b-lymphocytes-using-mtor-dependent-and-independent-pathways
#6
Mohamed F Ali, Harika Dasari, Virginia P Van Keulen, Divi Cornec, George Vasmatzis, Tobias Peikert, Eva M Carmona
Metalloproteinases (MMPs) contribute to tissue remodeling and acute inflammation not only by degrading extracellular matrix proteins but also by controlling the influx of chemokines through the regulation and shedding of syndecans. B-lymphocytes, in addition to their well-known function as antibody producing cells, participate in the innate immune response by secreting inflammatory cytokines and chemokines. However, there is little information about the role of B-lymphocytes in the regulation of MMPs; consequently, herein we investigated whether activated human circulating B-lymphocytes contributed to the secretion of MMPs...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28633699/migration-histories-of-multidrug-resistant-tuberculosis-patients-from-the-thailand-myanmar-border-2012-2014
#7
S S Thi, D M Parker, L L Swe, S Pukrittayakamee, C L Ling, K Amornpaisarnloet, M Vincenti-Delmas, F H Nosten
SETTING: Multidrug-resistant tuberculosis (MDR-TB) is a growing public health threat in South-East Asia. TB is typically a disease of poverty and can be spread by infectious humans who migrate from one region to another. DESIGN: We interviewed 20 MDR-TB patients on the Thailand-Myanmar border with regard to their migration histories. Migration origins and destinations were mapped. RESULTS: All but one participant had a history of migration, and maps of migration ranges revealed wide geographic dispersal...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28633332/anti-fas2-igm-antibodies-in-fasciola-hepatica-infected-patients-with-positive-igg-serology
#8
Liliya Kazantseva, María Del Pilar García Lázaro, Patricia Herrera-Velit, Jose R Espinoza
Background: Fascioliasis is an infectious disease caused by parasites Fasciola hepatica and F. gigantica. Humans are infected by the consumption of vegetables and water contaminated with the infective form of the parasite. Materials and Methods: In this study, an IgM-ELISA with the cysteine proteinase Fas2 antigen was evaluated with sera from 76 patients infected with F. hepatica, 24 patients with other parasite infections and 84 healthy volunteers. Results: IgM-ELISA resulted in 43% positives in F...
March 1, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28632912/surveillance-and-early-warning-systems-of-infectious-disease-in-china-from-2012-to-2014
#9
Honglong Zhang, Liping Wang, Shengjie Lai, Zhongjie Li, Qiao Sun, Peng Zhang
Appropriate surveillance and early warning of infectious diseases have very useful roles in disease control and prevention. In 2004, China established the National Notifiable Infectious Disease Surveillance System and the Public Health Emergency Event Surveillance System to report disease surveillance and events on the basis of data sources from the National Notifiable Infectious Disease Surveillance System, China Infectious Disease Automated-alert and Response System in this country. This study provided a descriptive summary and a data analysis, from 2012 to 2014, of these 3 key surveillance and early warning systems of infectious disease in China with the intent to provide suggestions for system improvement and perfection...
June 20, 2017: International Journal of Health Planning and Management
https://www.readbyqxmd.com/read/28632831/-antiseptics-and-disinfectants-aiming-at-rational-use-recommendations-of-the-advisory-committee-on-healthcare-associated-infections-sociedad-chilena-de-infectolog%C3%A3-a
#10
Alexis Diomedi, Eiiana Chacón, Luis Delpiano, Beatrice Hervé, M Irene Jemenao, Myriam Medel, Marcela Quintanilla, Gisela Riedel, Javier Tinoco, Marcela Cifuentes
Proper use of antiseptics and disinfectants, is an essential tool to prevent the spread of infectious agents and to control of healthcare-associated infections (HAI). Given the increasing importance of environmental aspects, as well as several advances and updates in the field of its proper use at local and intemational level, the SOCHINF HAI Advisory Committee considers that it is necessary to develop a guide for the rational use of antiseptics and disinfectants, which it will provide consistent scientific basis with that purpose...
April 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28631649/chlamydia-trachomatis-proctitis-masquerading-as-carcinoma-rectum-first-case-report-from-india
#11
Benu Dhawan, Govind Kumar Makharia, Deepak Juyal, Sujeesh Sebastian, Riti Bhatia, Neena Khanna
While proctitis is caused both by infectious and noninfectious causes, infectious causes are acquired typically sexually. Chlamydia trachomatis, which is the most frequent bacterial pathogen causing sexually transmitted infections worldwide, is one of the causative agents of proctitis. We report a case history of a bisexual male who presented to us with rectal bleeding. The colonoscopy showed a nodular ulcerated lesion in the rectum suggestive of rectal malignancy, but biopsies from rectal mass did not reveal malignancy...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28631594/human-picornaviruses-associated-with-neurological-diseases-and-their-neutralization-by-antibodies
#12
Maria Anastasina, Aušra Domanska, Kaia Palm, Sarah Butcher
Picornaviruses are the most commonly encountered infectious agents in mankind. They typically cause mild infections of the gastrointestinal or respiratory tract, but sometimes also invade the central nervous system. There, they can cause severe diseases with long-term sequelae and even be lethal. The most infamous picornavirus is poliovirus, for which significant epidemics of poliomyelitis were reported from the end of the nineteenth century. A successful vaccination campaign has brought poliovirus close to eradication, but neurological diseases caused by other picornaviruses have increasingly been reported since the late 1990s...
June 20, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28631108/reproduction-number-and-asymptotic-stability-for-the-dynamics-of-a-honey-bee-colony-with-continuous-age-structure
#13
M I Betti, L M Wahl, M Zamir
A system of partial differential equations is derived as a model for the dynamics of a honey bee colony with a continuous age distribution, and the system is then extended to include the effects of a simplified infectious disease. In the disease-free case, we analytically derive the equilibrium age distribution within the colony and propose a novel approach for determining the global asymptotic stability of a reduced model. Furthermore, we present a method for determining the basic reproduction number [Formula: see text] of the infection; the method can be applied to other age-structured disease models with interacting susceptible classes...
June 19, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28630251/valnoctamide-inhibits-cytomegalovirus-infection-in-developing-brain-and-attenuates-neurobehavioral-dysfunctions-and-brain-abnormalities
#14
Sara Ornaghi, Lawrence S Hsieh, Angélique Bordey, Patrizia Vergani, Michael J Paidas, Anthony N van den Pol
Cytomegalovirus (CMV) is the most common infectious cause of brain defects and neurological dysfunction in developing human babies. Due to the teratogenicity and toxicity of available CMV antivirals, treatment options during early development are markedly limited. Valnoctamide (VCD), a neuroactive mood stabilizer with no known teratogenic activity, was recently demonstrated to have anti-CMV potential. However, it is not known whether this can be translated into an efficacious therapeutic effect to improve CMV-induced adverse neurological outcomes...
June 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28630091/b-1a-cells-protect-mice-from-sepsis-critical-role-of-creb
#15
Monowar Aziz, Nichol E Holodick, Thomas L Rothstein, Ping Wang
Bacterial sepsis is a serious life-threatening condition caused by an excessive immune response to infection. B-1 cells differ from conventional B-2 cells by their distinct phenotype and function. A subset of B-1 cells expressing CD5, known as B-1a cells, exhibits innate immune activity. Here we report that B-1a cells play a beneficial role in sepsis by mitigating exaggerated inflammation through a novel mechanism. Using a mouse model of bacterial sepsis, we found that the numbers of B-1a cells in various anatomical locations were significantly decreased...
June 19, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28629818/corydalis-hendersonii-hemsl-protects-against-myocardial-injury-by-attenuating-inflammation-and-fibrosis-via-nf-%C3%AE%C2%BAb-and-jak2-stat3-signaling-pathways
#16
Ruifeng Bai, Xu Yin, Xiao Feng, Yuan Cao, Yan Wu, Zhixiang Zhu, Chun Li, Pengfei Tu, Xingyun Chai
ETHNOPHARMACOLOGICAL RELEVANCE: Corydalis hendersonii Hemsl. (CH) with heat clearing and detoxifying effects are well described in Tibetan folk medicine. It has been used for centuries in China largely for the treatment of high altitude polycythemia, a pathophysiological condition referred to "plethora" in Tibetan medicine, hypertension, hepatitis, edema, gastritis, and other infectious diseases. AIM OF THE STUDY: To investigate the cardioprotective effects of Corydalis hendersonii extract in an ICR mouse model of myocardial ischemic injury...
June 16, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28629797/diagnosing-inequity-in-infectious-disease-control
#17
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
June 2017: EBioMedicine
https://www.readbyqxmd.com/read/28628889/the-innate-immune-response-to-lower-respiratory-tract-e-coli-infection-and-the-role-of-the-ccl2-ccr2-axis-in-neonatal-mice
#18
Sharon A McGrath-Morrow, Roland Ndeh, Joseph M Collaco, Amy K Poupore, Dustin Dikeman, Qiong Zhong, Benjamin D Singer, Franco D'Alessio, Alan Scott
Neonates have greater morbidity/mortality from lower respiratory tract infections (LRTI) compared to older children. Lack of conditioning of the pulmonary immune system due to limited environmental exposures and/or infectious challenges likely contributes to the increase susceptibility in the neonate. In this study, we sought to gain insights into the nature and dynamics of the neonatal pulmonary immune response to LRTI using a murine model. METHODS: Wildtype (WT) and Ccr2(-/-) C57BL/6 neonatal and juvenile mice received E...
June 16, 2017: Cytokine
https://www.readbyqxmd.com/read/28628607/host-gene-expression-analysis-in-sri-lankan-melioidosis-patients
#19
Shivankari Krishnananthasivam, Nimanthi Jayathilaka, Harindra Darshana Sathkumara, Enoka Corea, Mohan Natesan, Aruna Dharshan De Silva
BACKGROUND: Melioidosis is a life threatening infectious disease caused by the gram-negative bacillus Burkholderia pseudomallei predominantly found in southeast Asia and northern Australia. Studying the host transcription profiles in response to infection is crucial for understanding disease pathogenesis and correlates of disease severity, which may help improve therapeutic intervention and survival. The aim of this study was to analyze gene expression levels of human host factors in melioidosis patients and establish useful correlation with disease biomarkers, compared to healthy individuals and patients with sepsis caused by other pathogens...
June 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28628018/autoimmune-limbic-encephalitis-case-reports
#20
K Kobaidze, A Harrison, Y Burklin, V Patidar, M Riccardi
Limbic encephalitis (LE) is an autoimmune or paraneoplastic disease that affects the medial temporal lobes. The patient will usually present with cognitive impairment, psychiatric changes, and seizures. Autoimmune limbic encephalitis (LE) is a challenging diagnosis as it is not always included in the typical paraneoplastic/autoimmune panels. Anti-GAD antibodies are associated with various disease including type I diabetes mellitus, various autoimmune processes, some neoplastic and infectious diseases. Thus, it is not as specific as some of the antibodies causing LE...
May 2017: Georgian Medical News
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