keyword
MENU ▼
Read by QxMD icon Read
search

Host factors and malaria

keyword
https://www.readbyqxmd.com/read/29143406/oncogenic-spiral-by-infectious-pathogens-the-cooperation-of-multiple-factors-in-cancer-development
#1
Jun-Ichirou Yasunaga, Masao Matsuoka
Chronic infection is one of the major causes of cancer, and there are several mechanisms for infection-mediated oncogenesis. Some pathogens encode gene products that behave like oncogenic factors, hijacking cellular pathways to promote the survival and proliferation of infected cells in vivo. Some of these viral oncoproteins trigger a cellular damage defense response leading to senescence; however, other viral factors hinder this suppressive effect, suggesting that cooperation of those viral factors is important for malignant transformation...
November 15, 2017: Cancer Science
https://www.readbyqxmd.com/read/29141217/th1-like-plasmodium-specific-memory-cd4-t-cells-support-humoral-immunity
#2
Ryan A Zander, Rahul Vijay, Angela D Pack, Jenna J Guthmiller, Amy C Graham, Scott E Lindner, Ashley M Vaughan, Stefan H I Kappe, Noah S Butler
Effector T cells exhibiting features of either T helper 1 (Th1) or T follicular helper (Tfh) populations are essential to control experimental Plasmodium infection and are believed to be critical for resistance to clinical malaria. To determine whether Plasmodium-specific Th1- and Tfh-like effector cells generate memory populations that contribute to protection, we developed transgenic parasites that enable high-resolution study of anti-malarial memory CD4 T cells in experimental models. We found that populations of both Th1- and Tfh-like Plasmodium-specific memory CD4 T cells persist...
November 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/29138897/correction-to-imported-falciparum-malaria-in-adults-host-and-parasite-related-factors-associated-with-severity-the-french-prospective-multicenter-palurea-cohort-study
#3
Fabrice Bruneel, Florence Tubach, Jean-Paul Mira, Sandrine Houze, Sebastien Gibot, Marie-Genevieve Huisse, Bruno Megarbane, Christophe Choquet, Philippe Corne, Eric Peytel, Daniel Villers, Christophe Camus, Olivier Bouchaud, Eric Caumes, Pierre-Marie Girard, Fabrice Simon, Antoine Kalloumeh, Carine Roy, Remy Durand, Jacques Le Bras, Sophie Matheron, Michel Wolff
The members of the Palurea Study Group were provided in such a way that they could not be indexed as collaborators on PubMed. The publisher apologizes for this error and is pleased to list the members of the group here.
November 14, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/29123481/development-in-assay-methods-for-in-vitro-antimalarial-drug-efficacy-testing-a-systematic-review
#4
REVIEW
Shweta Sinha, Phulen Sarma, Rakesh Sehgal, Bikash Medhi
The emergence and spread of drug resistance are the major challenges in malaria eradication mission. Besides various strategies laid down by World Health Organization, such as vector management, source reduction, early case detection, prompt treatment, and development of new diagnostics and vaccines, nevertheless the need for new and efficacious drugs against malaria has become a critical priority on the global malaria research agenda. At several screening stages, millions of compounds are screened (1,000-2,000,000 compounds per screening campaign), before pre-clinical trials to select optimum lead...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29094698/single-cell-rna-sequencing-reveals-a-signature-of-sexual-commitment-in-malaria-parasites
#5
Asaf Poran, Christopher Nötzel, Omar Aly, Nuria Mencia-Trinchant, Chantal T Harris, Monica L Guzman, Duane C Hassane, Olivier Elemento, Björn F C Kafsack
Pathogens have to balance transmission with persistence. For Plasmodium falciparum, the most widespread and virulent malaria parasite, persistence within its human host requires continuous asexual replication within red blood cells, while its mosquito-borne transmission depends on intra-erythrocytic differentiation into non-replicating sexual stages called gametocytes. Commitment to either fate is determined during the preceding cell cycle that begins with invasion by a single, asexually committed merozoite and ends, 48 hours later, with a schizont releasing newly formed merozoites, all committed to either continued asexual replication or differentiation into gametocytes...
November 2, 2017: Nature
https://www.readbyqxmd.com/read/29078358/crispr-cas9-knockouts-reveal-genetic-interaction-between-strain-transcendent-erythrocyte-determinants-of-plasmodium-falciparum-invasion
#6
Usheer Kanjee, Christof Grüring, Mudit Chaand, Kai-Min Lin, Elizabeth Egan, Jale Manzo, Patrick L Jones, Tiffany Yu, Robert Barker, Michael P Weekes, Manoj T Duraisingh
During malaria blood-stage infections, Plasmodium parasites interact with the RBC surface to enable invasion followed by intracellular proliferation. Critical factors involved in invasion have been identified using biochemical and genetic approaches including specific knockdowns of genes of interest from primary CD34(+) hematopoietic stem cells (cRBCs). Here we report the development of a robust in vitro culture system to produce RBCs that allow the generation of gene knockouts via CRISPR/Cas9 using the immortal JK-1 erythroleukemia line...
October 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29070841/an-apiap2-member-regulates-expression-of-clonally-variant-genes-of-the-human-malaria-parasite-plasmodium-falciparum
#7
Rafael M Martins, Cameron R Macpherson, Aurélie Claes, Christine Scheidig-Benatar, Hiroshi Sakamoto, Xue Yan Yam, Peter Preiser, Suchi Goel, Mats Wahlgren, Odile Sismeiro, Jean-Yves Coppée, Artur Scherf
Variegated surface antigen expression is key to chronic infection and pathogenesis of the human malaria parasite Plasmodium falciparum. This protozoan parasite expresses distinct surface molecules that are encoded by clonally variant gene families such as var, rif and stevor. The molecular mechanisms governing activation of individual members remain ill-defined. To investigate the molecular events of the initial transcriptional activation process we focused on a member of the apicomplexan ApiAP2 transcription factor family predicted to bind to the 5' upstream regions of the var gene family, AP2-exp (PF3D7_1466400)...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29066816/host-factors-that-modify-plasmodium-falciparum-adhesion-to-endothelial-receptors
#8
Almahamoudou Mahamar, Oumar Attaher, Bruce Swihart, Amadou Barry, Bacary S Diarra, Moussa B Kanoute, Kadidia B Cisse, Adama B Dembele, Sekouba Keita, Benoît Gamain, Santara Gaoussou, Djibrilla Issiaka, Alassane Dicko, Patrick E Duffy, Michal Fried
P. falciparum virulence is related to adhesion and sequestration of infected erythrocytes (IE) in deep vascular beds, but the endothelial receptors involved in severe malaria remain unclear. In the largest ever study of clinical isolates, we surveyed adhesion of freshly collected IE from children under 5 years of age in Mali to identify novel vascular receptors, and examined the effects of host age, hemoglobin type, blood group and severe malaria on levels of IE adhesion to a panel of endothelial receptors...
October 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29059253/a-novel-electronic-algorithm-using-host-biomarker-point-of-care-tests-for-the-management-of-febrile-illnesses-in-tanzanian-children-e-poct-a-randomized-controlled-non-inferiority-trial
#9
RANDOMIZED CONTROLLED TRIAL
Kristina Keitel, Frank Kagoro, Josephine Samaka, John Masimba, Zamzam Said, Hosiana Temba, Tarsis Mlaganile, Willy Sangu, Clotilde Rambaud-Althaus, Alain Gervaix, Blaise Genton, Valérie D'Acremont
BACKGROUND: The management of childhood infections remains inadequate in resource-limited countries, resulting in high mortality and irrational use of antimicrobials. Current disease management tools, such as the Integrated Management of Childhood Illness (IMCI) algorithm, rely solely on clinical signs and have not made use of available point-of-care tests (POCTs) that can help to identify children with severe infections and children in need of antibiotic treatment. e-POCT is a novel electronic algorithm based on current evidence; it guides clinicians through the entire consultation and recommends treatment based on a few clinical signs and POCT results, some performed in all patients (malaria rapid diagnostic test, hemoglobin, oximeter) and others in selected subgroups only (C-reactive protein, procalcitonin, glucometer)...
October 2017: PLoS Medicine
https://www.readbyqxmd.com/read/29038124/plasmodium-falciparum-pfemp1-modulates-monocyte-macrophage-transcription-factor-activation-and-cytokine-and-chemokine-responses
#10
Natália Guimarães Sampaio, Emily Marie Eriksson, Louis Schofield
Immunity to Plasmodium falciparum malaria is slow to develop, and it is often asserted that malaria suppresses host immunity, although this is poorly understood and the molecular basis for such activity remains unknown. P. falciparum Erythrocyte Membrane Protein 1 (PfEMP1) is a virulence factor that plays a key role in parasite-host interactions. We investigated the immunosuppressive effect of PfEMP1 on monocytes/macrophages, which are central to the anti-parasitic innate response. RAW macrophages and human primary monocytes were stimulated with wild-type 3D7 or CS2 parasites or transgenic PfEMP1-null parasites...
October 16, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29031707/modeling-host-seeking-behavior-of-african-malaria-vector-mosquitoes-in-the-presence-of-long-lasting-insecticidal-nets
#11
Anna Shcherbacheva, Heikki Haario, Gerry F Killeen
The efficiency of spatial repellents and long-lasting insecticide-treated nets (LLINs) is a key research topic in malaria control. Insecticidal nets reduce the mosquito-human contact rate and simultaneously decrease mosquito populations. However, LLINs demonstrate dissimilar efficiency against different species of malaria mosquitoes. Various factors have been proposed as an explanation, including differences in insecticide-induced mortality, flight characteristics, or persistence of attack. Here we present a discrete agent-based approach that enables the efficiency of LLINs, baited traps and Insecticide Residual Sprays (IRS) to be examined...
October 12, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/29028886/analysis-of-protein-targets-in-pathogen-host-interaction-in-infectious-diseases-a-case-study-on-plasmodium-falciparum-and-homo-sapiens-interaction-network
#12
Sovan Saha, Kaustav Sengupta, Piyali Chatterjee, Subhadip Basu, Mita Nasipuri
Infection and disease progression is the outcome of protein interactions between pathogen and host. Pathogen, the role player of Infection, is becoming a severe threat to life as because of its adaptability toward drugs and evolutionary dynamism in nature. Identifying protein targets by analyzing protein interactions between host and pathogen is the key point. Proteins with higher degree and possessing some topologically significant graph theoretical measures are found to be drug targets. On the other hand, exceptional nodes may be involved in infection mechanism because of some pathway process and biologically unknown factors...
September 23, 2017: Briefings in Functional Genomics
https://www.readbyqxmd.com/read/29016337/the-multifactorial-epidemiology-of-blackwater-fever
#13
G Dennis Shanks
Blackwater fever is a massive hemolytic event usually occurring in the context of repeated falciparum malaria infections and intermittent quinine use. Its etiology is poorly understood, and it is rarely seen today. Historical epidemiological observations from the 20th century demonstrated variable patterns in prisoners in Andaman Islands, refugees in Macedonia, canal workers in Panama, expatriates in Rhodesia, and Second World War soldiers. Rates of blackwater fever per 1,000 malaria cases varied over two orders of magnitude...
October 2, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28988696/phospholipases-during-membrane-dynamics-in-malaria-parasites
#14
REVIEW
Ansgar Flammersfeld, Christina Lang, Antje Flieger, Gabriele Pradel
Plasmodium parasites, the causative agents of malaria, display a well-regulated lipid metabolism required to ensure their survival in the human host as well as in the mosquito vector. The fine-tuning of lipid metabolic pathways is particularly important for the parasites during the rapid erythrocytic infection cycles, and thus enzymes involved in lipid metabolic processes represent prime targets for malaria chemotherapeutics. While plasmodial enzymes involved in lipid synthesis and acquisition have been studied in the past, to date not much is known about the roles of phospholipases for proliferation and transmission of the malaria parasite...
September 23, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28981210/proteome-and-structural-organization-of-the-knob-complex-on-the-surface-of-the-plasmodium-infected-red-blood-cell
#15
ShubaVarshini Alampalli, Manish Grover, Syama Chandran, Utpal Tatu, Pragyan Achary
PURPOSE: The cell membrane of the erythrocytes infected with the malaria parasite Plasmodium falciparum undergoes several changes during the course of parasite life cycle and forms protrusions known as 'knobs' on its surface during the mature trophozoite and schizont stages. The structural organization of knob components especially PfEMP1 on the iRBC surface is the main determinant for the cytoadhesive and rosetting capacity of the iRBC by binding to various host receptors as well as for the variable antigenicity, which is crucial for immunoevasion...
October 5, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/28964681/the-plasmodium-liver-stage-parasitophorous-vacuole-a-front-line-of-communication-between-parasite-and-host
#16
REVIEW
Britta Nyboer, Kirsten Heiss, Ann-Kristin Mueller, Alyssa Ingmundson
The intracellular development and differentiation of the Plasmodium parasite in the host liver is a prerequisite for the actual onset of malaria disease pathology. Since liver-stage infection is clinically silent and can be completely eliminated by sterilizing immune responses, it is a promising target for urgently needed innovative antimalarial drugs and/or vaccines. Discovered more than 65 years ago, these stages remain poorly understood regarding their molecular repertoire and interaction with their host cells in comparison to the pathogenic erythrocytic stages...
September 15, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28963676/genetic-variants-of-tumor-necrosis-factor-%C3%AE-308g-a-rs1800629-but-not-toll-interacting-proteins-or-vitamin-d-receptor-genes-enhances-susceptibility-and-severity-of-malaria-infection
#17
Olusola Ojurongbe, Roland I Funwei, Tara J Snyder, Iman Farid, Najihah Aziz, Yi Li, Catherine O Falade, Bolaji N Thomas
Susceptibility to malaria infection has been associated with host genetic polymorphisms that differs between groups. We hypothesize that Toll-interacting proteins (TOLLIP), vitamin D receptor (VDR) and tumor necrosis factor-α (TNF) genes are significant contributors to susceptibility and disease severity in Plasmodium falciparum (Pf) infection. Our aim is to explore the genomic diversity and haplotype frequency of these genes, as well as extrapolate possible association with markers of severity, between malaria-infected and healthy controls...
September 30, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28959740/the-exported-chaperone-pfhsp70x-is-dispensable-for-the-plasmodium-falciparum-intraerythrocytic-life-cycle
#18
David W Cobb, Anat Florentin, Manuel A Fierro, Michelle Krakowiak, Julie M Moore, Vasant Muralidharan
Export of parasite proteins into the host erythrocyte is essential for survival of Plasmodium falciparum during its asexual life cycle. While several studies described key factors within the parasite that are involved in protein export, the mechanisms employed to traffic exported proteins within the host cell are currently unknown. Members of the Hsp70 family of chaperones, together with their Hsp40 cochaperones, facilitate protein trafficking in other organisms, and are thus likely used by P. falciparum in the trafficking of its exported proteins...
September 2017: MSphere
https://www.readbyqxmd.com/read/28932814/the-gut-commensal-microbiome-of-drosophila-melanogaster-is-modified-by-the-endosymbiont-wolbachia
#19
Rama K Simhadri, Eva M Fast, Rong Guo, Michaela J Schultz, Natalie Vaisman, Luis Ortiz, Joanna Bybee, Barton E Slatko, Horacio M Frydman
Endosymbiotic Wolbachia bacteria and the gut microbiome have independently been shown to affect several aspects of insect biology, including reproduction, development, life span, stem cell activity, and resistance to human pathogens, in insect vectors. This work shows that Wolbachia bacteria, which reside mainly in the fly germline, affect the microbial species present in the fly gut in a lab-reared strain. Drosophila melanogaster hosts two main genera of commensal bacteria-Acetobacter and Lactobacillus. Wolbachia-infected flies have significantly reduced titers of Acetobacter...
September 2017: MSphere
https://www.readbyqxmd.com/read/28931852/improvement-of-a-fermentation-process-for-the-production-of-two-pfama1-dico-based-malaria-vaccine-candidates-in-pichia-pastoris
#20
Robin Kastilan, Alexander Boes, Holger Spiegel, Nadja Voepel, Ivana Chudobová, Stephan Hellwig, Johannes Felix Buyel, Andreas Reimann, Rainer Fischer
Pichia pastoris is a simple and powerful expression platform that has the ability to produce a wide variety of recombinant proteins, ranging from simple peptides to complex membrane proteins. A well-established fermentation strategy is available comprising three main phases: a batch phase, followed by a glycerol fed-batch phase that increases cell density, and finally an induction phase for product expression using methanol as the inducer. We previously used this three-phase strategy at the 15-L scale to express three different AMA1-DiCo-based malaria vaccine candidates to develop a vaccine cocktail...
September 20, 2017: Scientific Reports
keyword
keyword
95368
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"