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https://www.readbyqxmd.com/read/28400759/human-and-epstein-barr-virus-mirna-profiling-as-predictive-biomarkers-for-endemic-burkitt-lymphoma
#1
Cliff I Oduor, Mercedeh Movassagh, Yasin Kaymaz, Kiprotich Chelimo, Juliana Otieno, John M Ong'echa, Ann M Moormann, Jeffrey A Bailey
Endemic Burkitt lymphoma (eBL) is an aggressive B cell lymphoma and is associated with Epstein-Barr virus (EBV) and Plasmodium falciparum malaria co-infections. Central to BL oncogenesis is the over-expression of the MYC proto-oncogene which is caused by a translocation of an Ig enhancer in approximation to the myc gene. While whole genome/transcriptome sequencing methods have been used to define driver mutations and transcriptional dysregulation, microRNA (miRNA) dysregulation and differential expression has yet to be fully characterized...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28386613/magnetically-enabled-biomarker-extraction-and-delivery-system-towards-integrated-assured-diagnostic-tools
#2
Westley S Bauer, Danielle W Kimmel, Nicholas M Adams, Lauren E Gibson, Thomas F Scherr, Kelly A Richardson, Joseph A Conrad, Hellen K Matakala, Frederick R Haselton, David W Wright
Diagnosis of asymptomatic malaria poses a great challenge to global disease elimination efforts. Healthcare infrastructure in rural settings cannot support existing state-of-the-art tools necessary to diagnose asymptomatic malaria infections. Instead, lateral flow immunoassays (LFAs) are widely used as a diagnostic tool in malaria endemic areas. While LFAs are simple and easy to use, they are unable to detect low levels of parasite infection. We have developed a field deployable Magnetically-enabled Biomarker Extraction And Delivery System (mBEADS) that significantly improves limits of detection for several commercially available LFAs...
April 7, 2017: Analyst
https://www.readbyqxmd.com/read/28270152/a-systematic-review-on-malaria-sero-epidemiology-studies-in-the-brazilian-amazon-insights-into-immunological-markers-for-exposure-and-protection
#3
Pedro M Folegatti, André M Siqueira, Wuelton M Monteiro, Marcus Vinícius G Lacerda, Chris J Drakeley, Érika M Braga
BACKGROUND: Considerable success in reducing malaria incidence and mortality has been achieved in Brazil, leading to discussions over the possibility of moving towards elimination. However, more than reporting and counting clinical cases, elimination will require the use of efficient tools and strategies for measuring transmission dynamics and detecting the infectious reservoir as the primary indicators of interest for surveillance and evaluation. Because acquisition and maintenance of anti-malarial antibodies depend on parasite exposure, seroprevalence rates could be used as a reliable tool for assessing malaria endemicity and an adjunct measure for monitoring transmission in a rapid and cost-effective manner...
March 7, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28252130/an-embedded-barcode-for-connected-malaria-rapid-diagnostic-tests
#4
Thomas F Scherr, Sparsh Gupta, David W Wright, Frederick R Haselton
Many countries are shifting their efforts from malaria control to disease elimination. New technologies will be necessary to meet the more stringent demands of elimination campaigns, including improved quality control of malaria diagnostic tests, as well as an improved means for communicating test results among field healthcare workers, test manufacturers, and national ministries of health. In this report, we describe and evaluate an embedded barcode within standard rapid diagnostic tests as one potential solution...
March 2, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28248238/-omics-informed-drug-and-biomarker-discovery-opportunities-challenges-and-future-perspectives
#5
REVIEW
Holly Matthews, James Hanison, Niroshini Nirmalan
The pharmaceutical industry faces unsustainable program failure despite significant increases in investment. Dwindling discovery pipelines, rapidly expanding R&D budgets and increasing regulatory control, predict significant gaps in the future drug markets. The cumulative duration of discovery from concept to commercialisation is unacceptably lengthy, and adds to the deepening crisis. Existing animal models predicting clinical translations are simplistic, highly reductionist and, therefore, not fit for purpose...
September 12, 2016: Proteomes
https://www.readbyqxmd.com/read/28203097/cerebral-malaria-insight-into-pathogenesis-complications-and-molecular-biomarkers
#6
Farah Hafiz Yusuf, Muhammad Yusuf Hafiz, Maria Shoaib, Syed Ahsanuddin Ahmed
Cerebral malaria is a medical emergency. All patients with Plasmodium falciparum malaria with neurologic manifestations of any degree should be urgently treated as cases of cerebral malaria. Pathogenesis of cerebral malaria is due to damaged vascular endothelium by parasite sequestration, inflammatory cytokine production and vascular leakage, which result in brain hypoxia, as indicated by increased lactate and alanine concentrations. The levels of the biomarkers' histidine-rich protein II, angiopoietin-Tie-2 system and plasma osteoprotegrin serve as diagnostic and prognostic markers...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28166246/soluble-human-leukocyte-antigen-g-during-pregnancy-and-infancy-in-benin-mother-child-resemblance-and-association-with-the-risk-of-malaria-infection-and-low-birth-weight
#7
Tania C d'Almeida, Ibrahim Sadissou, Jacqueline Milet, Gilles Cottrell, Amandine Mondière, Euripide Avokpaho, Laure Gineau, Audrey Sabbagh, Achille Massougbodji, Kabirou Moutairou, Eduardo A Donadi, Benoit Favier, Edgardo Carosella, Philippe Moreau, Nathalie Rouas-Freiss, David Courtin, André Garcia
Human leukocyte antigen (HLA) G is a tolerogenic molecule involved in the maternal-fetal immune tolerance phenomenon. Its expression during some infectious diseases leading to immune evasion has been established. A first study conducted in Benin has shown that the production of soluble HLA-G (sHLA-G) during the first months of life is strongly correlated with the maternal level at delivery and associated with low birth weight and malaria. However sHLA-G measurements during pregnancy were not available for mothers and furthermore, to date the evolution of sHLA-G in pregnancy is not documented in African populations...
2017: PloS One
https://www.readbyqxmd.com/read/28152989/small-quantity-lipid-based-nutrient-supplements-containing-different-amounts-of-zinc-along-with-diarrhea-and-malaria-treatment-increase-iron-and-vitamin-a-status-and-reduce-anemia-prevalence-but-do-not-affect-zinc-status-in-young-burkinabe-children-a-cluster
#8
Souheila Abbeddou, Elizabeth Yakes Jimenez, Jérome W Somé, Jean Bosco Ouédraogo, Kenneth H Brown, Sonja Y Hess
BACKGROUND: We assessed the effects of providing a package of interventions including small-quantity lipid-based nutrient supplements (SQ-LNS) containing 0, 5 or 10 mg zinc and illness treatment to Burkinabe children from 9 to 18 months of age, on biomarkers of zinc, iron and vitamin A status at 18 months and compared with a non-intervention cohort (NIC). METHODS: Using a two-stage cluster randomized trial design, communities were randomly assigned to the intervention cohort (IC) or NIC, and extended family compounds within the IC were randomly assigned to different treatment groups...
February 2, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28139780/specific-and-sensitive-detection-of-plasmodium-falciparum-lactate-dehydrogenase-by-dna-scaffolded-silver-nanoclusters-combined-with-an-aptamer
#9
Wei-Xian Wang, Yee-Wai Cheung, Roderick M Dirkzwager, Wai-Chung Wong, Julian A Tanner, Hong-Wei Li, Yuqing Wu
Innovative nanomaterials offer significant potential for diagnosis of severe diseases of the developing world such as malaria. Small sized silver nanoclusters have shown promise for diagnostics due to their intense fluorescence emission and photo-stabilities. Here, double-stranded DNA-scaffolded silver nanoclusters (AgNCs-dsDNA) were prepared to detect the established malaria biomarker, Plasmodium falciparum lactate dehydrogenase (PfLDH). Significant luminescence enhancement over a wide concentration range of PfLDH was demonstrated...
January 31, 2017: Analyst
https://www.readbyqxmd.com/read/28137761/comprehensive-transcriptome-and-mutational-profiling-of-endemic-burkitt-lymphoma-reveals-ebv-type-specific-differences
#10
Yasin Kaymaz, Cliff I Oduor, Hongbo Yu, Juliana A Otieno, John M Ong'echa, Ann M Moormann, Jeffrey A Bailey
Endemic Burkitt lymphoma (eBL) is the most common pediatric cancer in malaria-endemic equatorial Africa and nearly always contains Epstein-Barr virus (EBV), unlike sporadic Burkitt Lymphoma (sBL) that occurs with a lower incidence in developed countries. Given these differences and the variable clinical presentation and outcomes, we sought to further understand pathogenesis by investigating transcriptomes using RNA sequencing (RNAseq) from multiple primary eBL tumors compared to sBL tumors. Within eBL tumors, minimal expression differences were found based on: anatomical presentation site, in-hospital survival rates, and EBV genome type; suggesting that eBL tumors are homogeneous without marked subtypes...
January 30, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28118834/on-the-cytokine-chemokine-network-during-plasmodium-vivax-malaria-new-insights-to-understand-the-disease
#11
Natália Satchiko Hojo-Souza, Dhelio Batista Pereira, Fernanda Sumika Hojo de Souza, Tiago Antônio de Oliveira Mendes, Mariana Santos Cardoso, Mauro Shugiro Tada, Graziela Maria Zanini, Daniella Castanheira Bartholomeu, Ricardo Toshio Fujiwara, Lilian Lacerda Bueno
BACKGROUND: The clinical outcome of malaria depends on the delicate balance between pro-inflammatory and immunomodulatory cytokine responses triggered during infection. Despite the numerous reports on characterization of plasma levels of cytokines/chemokines, there is no consensus on the profile of these mediators during blood stage malaria. The identification of acute phase biomarkers might contribute to a better understanding of the disease, allowing the use of more effective therapeutic approaches to prevent the progression towards severe disease...
January 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28049536/usefulness-of-a-biomarker-to-identify-placental-dysfunction-in-the-context-of-malaria
#12
REVIEW
Alexandra Gueneuc, Philippe Deloron, Gwladys I Bertin
In most tropical areas, pregnant women are at increased risk of malaria, as a consequence of the massive sequestration of parasitized red blood cells in the placenta. The placenta plays a key role in embryonic and fetal development as well as in maternal-fetal exchanges, and pregnancy-associated malaria may alter selected placenta functions that lead to stillbirth and low birth weight. Although there are several tools (blood smear examination, RDT, PCR) to diagnose malaria infection during pregnancy, there is currently no test to assess placenta dysfunction in the framework of pregnancy-associated malaria...
January 3, 2017: Malaria Journal
https://www.readbyqxmd.com/read/27999673/application-of-multi-target-phytotherapeutic-concept-in-malaria-drug-discovery-a-systems-biology-approach-in-biomarker-identification
#13
REVIEW
Protus Arrey Tarkang, Regina Appiah-Opong, Michael F Ofori, Lawrence S Ayong, Alexander K Nyarko
There is an urgent need for new anti-malaria drugs with broad therapeutic potential and novel mode of action, for effective treatment and to overcome emerging drug resistance. Plant-derived anti-malarials remain a significant source of bioactive molecules in this regard. The multicomponent formulation forms the basis of phytotherapy. Mechanistic reasons for the poly-pharmacological effects of plants constitute increased bioavailability, interference with cellular transport processes, activation of pro-drugs/deactivation of active compounds to inactive metabolites and action of synergistic partners at different points of the same signaling cascade...
2016: Biomarker Research
https://www.readbyqxmd.com/read/27932615/use-of-an-anopheles-salivary-biomarker-to-assess-malaria-transmission-risk-along-the-thailand-myanmar-border
#14
Phubeth Ya-Umphan, Dominique Cerqueira, Daniel M Parker, Gilles Cottrell, Anne Poinsignon, Franck Remoue, Cecile Brengues, Theeraphap Chareonviriyaphap, Francois Nosten, Vincent Corbel
Background: The modalities of malaria transmission along the Thailand-Myanmar border are poorly understood. Here we address the relevance of using a specific Anopheles salivary biomarker to measure the risk among humans of exposure to Anopheles bites. Methods: Serologic surveys were conducted from May 2013 to December 2014 in 4 sentinel villages. More than 9400 blood specimens were collected in filter papers from all inhabitants at baseline and then every 3 months thereafter, for up to 18 months, for analysis by enzyme-linked immunosorbent assay...
February 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27928087/operational-assessment-of-long-lasting-insecticidal-nets-by-using-an-anopheles-salivary-biomarker-of-human-vector-contact
#15
Mahoutin H Noukpo, Georgia B Damien, Emmanuel Elanga-N'Dille, André B Sagna, Papa M Drame, Evelyne Chaffa, Olayidé Boussari, Vincent Corbel, Martin Akogbéto, Franck Remoue
The widespread implementation of long-lasting insecticidal nets (LLINs) is a major intervention method for malaria control. Although the LLINs coverage increases, information available on the physical integrity (PI) of implemented LLINs is incomplete. This study aimed to validate human IgG antibody (Ab) response to Anopheles gSG6-P1 salivary peptide antigen, previously demonstrated as a pertinent biomarker of human exposure to Anopheles bites, for evaluating the PI of LLINs in field conditions. We analyzed data from 262 randomly selected children (< 5 years of age) in health districts of Benin...
December 7, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27911910/molecular-markers-of-radiation-induced-attenuation-in-intrahepatic-plasmodium-falciparum-parasites
#16
Miranda S Oakley, Nitin Verma, Hong Zheng, Vivek Anantharaman, Kazuyo Takeda, Yamei Gao, Timothy G Myers, Phuong Thao Pham, Babita Mahajan, Nirbhay Kumar, Davison Sangweme, Abhai K Tripathi, Godfree Mlambo, L Aravind, Sanjai Kumar
Experimental immunization with radiation attenuated sporozoites (RAS) and genetically attenuated sporozoites has proved to be a promising approach for malaria vaccine development. However, parasite biomarkers of growth attenuation and enhanced immune protection in response to radiation remain poorly understood. Here, we report on the effect of an attenuating dose of γ-irradiation (15 krad) on the Plasmodium falciparum sporozoite (PfSPZ) ultrastructure by electron microscopy, growth rate of liver stage P. falciparum in liver cell cultures, and genome-wide transcriptional profile of liver stage parasites by microarray...
2016: PloS One
https://www.readbyqxmd.com/read/27905921/systematic-review-of-the-role-of-angiopoietin-1-and-angiopoietin-2-in-plasmodium-species-infections-biomarkers-or-therapeutic-targets
#17
Gerdie M de Jong, Jasper J Slager, Annelies Verbon, Jaap J van Hellemond, Perry J J van Genderen
BACKGROUND: Levels of both angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2) correlate with malaria disease severity and are proposed as biomarkers and possible therapeutic targets. To establish their role in malaria, a systematic review was performed of the literature on Ang-1 and Ang-2 with regard to their potential as biomarkers in malaria and discuss their possible place in adjuvant treatment regimens. METHODS: Ten electronic databases were systematically searched to identify studies investigating Ang-1 and Ang-2 in human and murine malaria in both clinical and experimental settings...
December 1, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27888627/identification-of-differentially-expressed-genes-in-the-development-of-osteosarcoma-using-rna-seq
#18
Yihao Yang, Ya Zhang, Xin Qu, Junfeng Xia, Dongqi Li, Xiaojuan Li, Yu Wang, Zewei He, Su Li, Yonghong Zhou, Lin Xie, Zuozhang Yang
OBJECTIVE: Osteosarcoma (OS) is a malignant bone tumor with high morbidity in young adults and adolescents. This study aimed to discover potential early diagnosis biomarkers in OS. RESULTS: In total, 111 differentially expressed genes (DEGs) were identified in primary OS compared with normal controls and 235 DEGs were identified in metastatic OS compared with primary OS. AURKB and PPP2R2B were the significantly up-regulated and down-regulated hub proteins, respectively, in the PPI protein-protein network (PPI) network of primary OS...
December 27, 2016: Oncotarget
https://www.readbyqxmd.com/read/27871325/impact-of-placental-plasmodium-falciparum-malaria-infection-on-the-cameroonian-maternal-and-neonate-s-plasma-levels-of-some-cytokines-known-to-regulate-t-cells-differentiation-and-function
#19
Jean Claude Djontu, Stalone Siewe Siewe, Yolande Delphine Mpeke Edene, Benderli Christine Nana, Edwige Vanessa Chomga Foko, Jude Daiga Bigoga, Rose F G Leke, Rosette Megnekou
BACKGROUND: The impact of placental malaria (PM) infection on the expression profile of some cytokines known to regulate T cell differentiation and function and their influence on birth weight remain unclear. Moreover, there are no reports showing the relationship between PM and IL-27 or IL-28A. This study therefore sought to investigate whether placental P. falciparum infection alters the expression profile of the cytokines IL-28A, IL-27, IL-17E and IL-6 in mothers and their new born...
November 21, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27829560/enzyme-free-electrochemical-immunosensor-based-on-methylene-blue-and-the-electro-oxidation-of-hydrazine-on-pt-nanoparticles
#20
Gorachand Dutta, Sureshbabu Nagarajan, Lisa J Lapidus, Peter B Lillehoj
Enzyme-free electrochemical sensors enable rapid, high sensitivity measurements without the limitations associated with enzyme reporters. However, the performance of non-enzymatic electrochemical sensors tends to suffer from slow electrode kinetics and poor signal stability. We report a new enzyme-free electrochemical immunosensor based on a unique competitive detection scheme using methylene blue (MB), hydrazine and platinum nanoparticles (Pt NPs). This scheme is coupled with a robust immunosandwich format employing a MB-labelled detection antibody as a non-enzymatic reporter...
June 15, 2017: Biosensors & Bioelectronics
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