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Malaria biomarker

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https://www.readbyqxmd.com/read/28049536/usefulness-of-a-biomarker-to-identify-placental-dysfunction-in-the-context-of-malaria
#1
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
#2
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/anopheles-salivary-biomarker-to-assess-malaria-transmission-risk-along-the-thailand-myanmar-border
#3
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 of human exposure to anopheles bites. METHODS: Serologic surveys were conducted from May 2013 to December 2014 in 4 sentinel villages. Dried blood spots (n>9,400) were collected in filter papers among all inhabitants at baseline and then every three months up to 18 months...
December 8, 2016: 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
#4
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
#5
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
#6
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
#7
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...
November 24, 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
#8
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
#9
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...
November 3, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27806725/the-effect-of-malaria-and-anti-malarial-drugs-on-skeletal-and-cardiac-muscles
#10
REVIEW
Mauro Toledo Marrelli, Marco Brotto
Malaria remains one of the most important infectious diseases in the world, being a significant public health problem associated with poverty and it is one of the main obstacles to the economy of an endemic country. Among the several complications, the effects of malaria seem to target the skeletal muscle system, leading to symptoms, such as muscle aches, muscle contractures, muscle fatigue, muscle pain, and muscle weakness. Malaria cause also parasitic coronary artery occlusion. This article reviews the current knowledge regarding the effect of malaria disease and the anti-malarial drugs on skeletal and cardiac muscles...
November 2, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27774815/immunomic-approaches-for-antigen-discovery-of-human-parasites
#11
Kokouvi Kassegne, Eniola Michael Abe, Jun-Hu Chen, Xiao-Nong Zhou
Genetics combined with proteomics allows for a better understanding of parasite-host interactions and host immune responses. Immunomics elucidates that antigens are targets of induced or naturally acquired immunity (NAI), a promising solution to the challenge of eradicating human infections. High-throughput protein microarrays enhance rapid antigen discovery for the development of serodiagnostic tests/vaccines. Areas covered: This review systematically analyzes the emergence of protein microarrays as a powerful technology for parasite antigen discovery and subsequently summarizes some of the attributes and disadvantages of these approaches...
November 7, 2016: Expert Review of Proteomics
https://www.readbyqxmd.com/read/27748303/aetiology-outcomes-predictors-of-mortality-in-acute-respiratory-distress-syndrome-from-a-tertiary-care-centre-in-north-india
#12
Surendra K Sharma, Anunay Gupta, Ashutosh Biswas, Abhishek Sharma, Atul Malhotra, K T Prasad, Sreenivas Vishnubhatla, Sajal Ajmani, Hridesh Mishra, Manish Soneja, Shobha Broor
BACKGROUND & OBJECTIVES: Acute respiratory distress syndrome (ARDS) is a common disorder in critically ill patients and is associated with high mortality. There is a paucity of literature on this condition from developing countries. This prospective observational study was designed to find out the aetiology, outcomes and predictors of mortality in ARDS. METHODS: Sixty four consecutive patients who satisfied American-European Consensus Conference (AECC) definition of ARDS from medical Intensive Care Unit (ICU) of a tertiary care centre in New Delhi, India, were enrolled in the study...
June 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/27703996/host-biomarkers-are-associated-with-response-to-therapy-and-long-term-mortality-in-pediatric-severe-malaria
#13
Andrea L Conroy, Michael Hawkes, Chloe R McDonald, Hani Kim, Sarah J Higgins, Kevin R Barker, Sophie Namasopo, Robert O Opoka, Chandy C John, W Conrad Liles, Kevin C Kain
Background.  Host responses to infection are critical determinants of disease severity and clinical outcome. The development of tools to risk stratify children with malaria is needed to identify children most likely to benefit from targeted interventions. Methods.  This study investigated the kinetics of candidate biomarkers of mortality associated with endothelial activation and dysfunction (angiopoietin-2 [Ang-2], soluble FMS-like tyrosine kinase-1 [sFlt-1], and soluble intercellular adhesion molecule-1 [sICAM-1]) and inflammation (10 kDa interferon γ-induced protein [CXCL10/IP-10] and soluble triggering receptor expressed on myeloid cells-1 [sTREM-1]) in the context of a randomized, double-blind, placebo-controlled, parallel-arm trial evaluating inhaled nitric oxide versus placebo as adjunctive therapy to parenteral artesunate for severe malaria...
September 2016: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/27659695/development-of-an-indicator-displacement-based-detection-of-malaria-targeting-hrp-ii-as-biomarker-for-application-in-point-of-care-settings
#14
Babina Chakma, Priyamvada Jain, Naveen K Singh, Pranab Goswami
A novel label free spectrophotometric detection of malarial biomarker HRP-II following an indicator displacement assay has been developed. The assay is based on competitive displacement of murexide dye from its complex with Ni(2+) by HRP-II present in serum samples. The binding constant (Kd) discerned for the dye and HRP-II to Ni(2+) were 1.4 × 10(-6) M(-1) and 6.8 × 10(-9) M(-1), respectively. The progress of the reaction could be monitored from the change of color from orange (∼λ482 nm) to pink (∼λ515 nm) with the concomitant increase in HRP-II concentration in the mixture...
October 18, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27647324/absence-of-apolipoprotein-e-protects-mice-from-cerebral-malaria
#15
Fikregabrail Aberra Kassa, Kristin Van Den Ham, Anthony Rainone, Sylvie Fournier, Eric Boilard, Martin Olivier
Cerebral malaria claims the life of millions of people each year, particularly those of children, and is a major global public health problem. Thus, the identification of novel malaria biomarkers that could be utilized as diagnostic or therapeutic targets is becoming increasingly important. Using a proteomic approach, we previously identified unique biomarkers in the sera of malaria-infected individuals, including apolipoprotein E (ApoE). ApoE is the dominant apolipoprotein in the brain and has been implicated in several neurological disorders; therefore, we were interested in the potential role of ApoE in cerebral malaria...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27641435/tetrahydrobiopterin-supplementation-improves-phenylalanine-metabolism-in-a-murine-model-of-severe-malaria
#16
Matthew S Alkaitis, Hans C Ackerman
Tetrahydrobiopterin (BH4) is an essential cofactor for both phenylalanine hydroxylase and nitric oxide synthase. Patients with severe malaria have low urinary BH4, elevated plasma phenylalanine, and impaired endothelium-dependent vasodilation, suggesting that BH4 depletion may limit phenylalanine metabolism and nitric oxide synthesis. We infected C57BL/6 mice with Plasmodium berghei ANKA to characterize BH4 availability and to investigate the effects of BH4 supplementation. P. berghei ANKA infection lowered BH4 in plasma, erythrocytes, and brain tissue but raised it in aorta and liver tissue...
November 11, 2016: ACS Infectious Diseases
https://www.readbyqxmd.com/read/27634686/probucol-dramatically-enhances-dihydroartemisinin-effect-in-murine-malaria
#17
Aiko Kume, Dang Trinh Minh Anh, Mototada Shichiri, Noriko Ishida, Hiroshi Suzuki
BACKGROUND: Artemisinin-based combination therapy (ACT) has been adopted as national policy for the first-line treatment in large number of malaria-endemic regions. However, artemisinin-resistant parasites have emerged and are spreading, with slow-cleaning parasites being reported in patients treated with ACT. It means that more parasites are exposed to the partner drug alone and the risk of developing resistant parasites against the partner drug is increasing. Therefore, the development of a new method to enhance the effect of artemisinin is required...
2016: Malaria Journal
https://www.readbyqxmd.com/read/27630842/simple-molecular-methods-for-early-detection-of-chloroquine-drug-resistance-in-plasmodium-vivax-and-plasmodium-falciparum
#18
Gurjeet Singh, Raksha Singh, Anant Dattatraya Urhehar
INTRODUCTION: Malaria is a human disease of which causes high morbidity and mortality. In Plasmodium falciparum malaria, the resistance to antimalarial drugs, especially chloroquine (CQ) is one of the paramount factors contributing to the global increase in morbidity and mortality, due to malaria. Hence, there is a need for detection of chloroquine drug resistance genes i.e., pfcrt-o (Plasmodium falciparum chloroquine resistance transporter-o) and pfmdr-1 (Plasmodium falciparum multidrug resistance-1) of P...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27612570/neutrophil-gelatinase-associated-lipocalin-ngal-predicts-the-occurrence-of-malaria-induced-acute-kidney-injury
#19
Marlies E van Wolfswinkel, Liese C Koopmans, Dennis A Hesselink, Ewout J Hoorn, Rob Koelewijn, Jaap J van Hellemond, Perry J J van Genderen
BACKGROUND: Acute kidney injury (AKI) is a frequently encountered complication of imported Plasmodium falciparum infection. Markers of structural kidney damage have been found to detect AKI earlier than serum creatinine-based prediction models but have not yet been evaluated in imported malaria. This pilot study aims to explore the predictive performance of neutrophil gelatinase-associated lipocalin (NGAL) and kidney injury molecule-1 (KIM-1) for AKI in travellers with imported P. falciparum infection...
2016: Malaria Journal
https://www.readbyqxmd.com/read/27608777/predicting-survival-in-ards
#20
EDITORIAL
Niteen D Karnik, Anish V Gupta
Acute respiratory distress syndrome (ARDS) is a fulminant clinical disorder of varied etiology, characterized by diffuse lung injury and severe hypoxemia. It is a leading cause of ICU admission and the associated high mortality has sparked a lot of research on etiology, outcome, scoring systems, mortality predictors, biomarkers including inflammatory cytokines and even genomics in ARDS. The previously used AECC (American European Consensus Conference) definition (1994) of ARDS was replaced by the recent Berlin definition (2012) so as to improve its validity and reliability...
November 2015: Journal of the Association of Physicians of India
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