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Malaria biomarker

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https://www.readbyqxmd.com/read/29690924/the-effect-of-regularly-dosed-paracetamol-versus-no-paracetamol-on-renal-function-in-plasmodium-knowlesi-malaria-packnow-study-protocol-for-a-randomised-controlled-trial
#1
Daniel J Cooper, Katherine Plewes, Matthew J Grigg, Giri S Rajahram, Kim A Piera, Timothy William, Mark D Chatfield, Tsin Wen Yeo, Arjen M Dondorp, Nicholas M Anstey, Bridget E Barber
BACKGROUND: Plasmodium knowlesi is the most common cause of human malaria in Malaysia. Acute kidney injury (AKI) is a frequent complication. AKI of any cause can have long-term consequences, including increased risk of chronic kidney disease, adverse cardiovascular events and increased mortality. Additional management strategies are therefore needed to reduce the frequency and severity of AKI in malaria. In falciparum malaria, cell-free haemoglobin (CFHb)-mediated oxidative damage contributes to AKI...
April 24, 2018: Trials
https://www.readbyqxmd.com/read/29669942/cxcl10-stabilizes-t-cell-brain-endothelial-cell-adhesion-leading-to-the-induction-of-cerebral-malaria
#2
Elizabeth W Sorensen, Jeffrey Lian, Aleksandra J Ozga, Yoshishige Miyabe, Sophina W Ji, Shannon K Bromley, Thorsten R Mempel, Andrew D Luster
Malaria remains one of the world's most significant human infectious diseases and cerebral malaria (CM) is its most deadly complication. CM pathogenesis remains incompletely understood, hindering the development of therapeutics to prevent this lethal complication. Elevated levels of the chemokine CXCL10 are a biomarker for CM, and CXCL10 and its receptor CXCR3 are required for experimental CM (ECM) in mice, but their role has remained unclear. Using multiphoton intravital microscopy, CXCR3 receptor- and ligand-deficient mice and bone marrow chimeric mice, we demonstrate a key role for endothelial cell-produced CXCL10 in inducing the firm adhesion of T cells and preventing their cell detachment from the brain vasculature...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29596409/distinct-inflammatory-profile-underlies-pathological-increases-in-creatinine-levels-associated-with-plasmodium-vivax-malaria-clinical-severity
#3
Luís A B Cruz, Manoel Barral-Netto, Bruno B Andrade
BACKGROUND: Although Plasmodium vivax infection is a frequent cause of malaria worldwide, severe presentations have been more regularly described only in recent years. In this setting, despite clinical descriptions of multi-organ involvement, data associating it with kidney dysfunction are relatively scarce. Here, renal dysfunction is retrospectively analyzed in a large cohort of vivax malaria patients with an attempt to dissect its association with disease severity and mortality, and to determine the role of inflammation in its progression...
March 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29581051/febrile-illness-in-asia-gaps-in-epidemiology-diagnosis-management-for-informing-health-policy
#4
REVIEW
Poojan Shrestha, Tamalee Roberts, Anousin Homsana, Tin Ohn Myat, John A Crump, Yoel Lubell, Paul N Newton
BACKGROUND: There is increasing evidence on the aetiology and management of fevers in Asia, the importance of which has risen with declines in malaria incidence. AIMS: To conduct a narrative review of the epidemiology and management of fevers in South and South-East Asia and to highlight gaps in our knowledge that impair evidence-based health policy decisions. SOURCES: A narrative review of papers published since 2012 of developments in fever epidemiology, diagnosis and treatment in South and South-East Asia...
March 23, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29578181/identification-of-key-genes-related-to-high-risk-gastrointestinal-stromal-tumors-using-bioinformatics-analysis
#5
Shuan Jin, Wenhua Zhu, Jun Li
Aim: The purpose of this study was to identify predictive biomarkers used for clinical therapy and prognostic evaluation of high-risk gastrointestinal stromal tumors (GISTs). Materials and Methods: In this study, microarray data GSE31802 were used to identify differentially expressed genes (DEGs) between high-risk GISTs and low-risk GISTs. Then, enrichment analysis of DEGs was conducted based on the gene ontology and kyoto encyclopedia of genes and genomes pathway database...
2018: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/29557342/characterization-of-plasmodium-lactate-dehydrogenase-and-histidine-rich-protein-2-clearance-patterns-via-rapid-on-bead-detection-from-a-single-dried-blood-spot
#6
Christine F Markwalter, Lauren E Gibson, Lwiindi Mudenda, Danielle W Kimmel, Saidon Mbambara, Philip E Thuma, David W Wright
A rapid, on-bead ELISA for Plasmodium lactate dehydrogenase ( p LDH) and Plasmodium falciparum histidine-rich protein 2 (HRP2) was adapted for use with dried blood spot (DBS) samples. This assay detected both biomarkers from a single DBS sample with only 45 minutes of total incubation time and detection limits of 600 ± 500 pM ( p LDH) and 69 ± 30 pM (HRP2), corresponding to 150 and 24 parasites/μL, respectively. This sensitive and reproducible on-bead detection method was used to quantify p LDH and HRP2 in patient DBS samples from rural Zambia collected at multiple time points after treatment...
March 19, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29519240/lactate-clearance-as-a-prognostic-marker-of-mortality-in-severely-ill-febrile-children-in-east-africa
#7
A Aramburo, Jim Todd, Elizabeth C George, Sarah Kiguli, Peter Olupot-Olupot, Robert O Opoka, Charles Engoru, Samuel O Akech, Richard Nyeko, George Mtove, Diana M Gibb, Abdel G Babiker, Kathryn Maitland
BACKGROUND: Hyperlactataemia (HL) is a biomarker of disease severity that predicts mortality in patients with sepsis and malaria. Lactate clearance (LC) during resuscitation has been shown to be a prognostic factor of survival in critically ill adults, but little data exist for African children living in malaria-endemic areas. METHODS: In a secondary data analysis of severely ill febrile children included in the Fluid Expansion as Supportive Therapy (FEAST) resuscitation trial, we assessed the association between lactate levels at admission and LC at 8 h with all-cause mortality at 72 h (d72)...
March 9, 2018: BMC Medicine
https://www.readbyqxmd.com/read/29515150/detection-of-the-malaria-causing-plasmodium-parasite-in-saliva-from-infected-patients-using-topoisomerase-i-activity-as-a-biomarker
#8
Marianne Smedegaard Hede, Søren Fjelstrup, Felix Lötsch, Rella Manego Zoleko, Anna Klicpera, Mirjam Groger, Johannes Mischlinger, Lilian Endame, Luzia Veletzky, Ronja Neher, Anne Katrine Wrist Simonsen, Eskild Petersen, Ghyslain Mombo-Ngoma, Magnus Stougaard, Yi-Ping Ho, Rodrigo Labouriau, Michael Ramharter, Birgitta Ruth Knudsen
Malaria is among the major threats to global health with the main burden of disease being in rural areas of developing countries where accurate diagnosis based on non-invasive samples is in high demand. We here present a novel molecular assay for detection of malaria parasites based on technology that may be adapted for low-resource settings. Moreover, we demonstrate the exploitation of this assay for detection of malaria in saliva. The setup relies on pump-free microfluidics enabled extraction combined with a DNA sensor substrate that is converted to a single-stranded DNA circle specifically by topoisomerase I expressed by the malaria causing Plasmodium parasite...
March 7, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29512479/evaluation-of-malaria-urban-risk-using-an-immuno-epidemiological-biomarker-of-human-exposure-to-anopheles-bites
#9
Dipomin F Traoré, André B Sagna, Akré M Adja, Dounin D Zoh, Kouassi N Lingué, Issa Coulibaly, Bertin N'Cho Tchiekoi, Serge B Assi, Anne Poinsignon, Mamadou Dagnogo, Franck Remoue
Urban malaria is an underestimated serious health concern in African countries. This study aimed to evaluate the risk of malaria transmission in an urban area by evaluating the level of human exposure to Anopheles bites using an Anopheles salivary biomarker ( gambiae Salivary Gland Protein-6 peptide 1 [gSG6-P1] peptide). Two multidisciplinary cross-sectional studies were undertaken in five sites of Bouaké city (three urban districts and two surrounding villages, used as control; Côte d'Ivoire) during the rainy season and the dry season...
March 5, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29511216/direct-detection-of-unamplified-pathogen-rna-in-blood-lysate-using-an-integrated-lab-in-a-stick-device-and-ultrabright-sers-nanorattles
#10
Hoan T Ngo, Elizabeth Freedman, Ren Abelard Odion, Pietro Strobbia, Agampodi Swarnapali De Silva Indrasekara, Priya Vohra, Steve M Taylor, Tuan Vo-Dinh
Direct detection of genetic biomarkers in body fluid lysate without target amplification will revolutionize nucleic acid-based diagnostics. However, the low concentration of target sequences makes this goal challenging. We report a method for direct detection of pathogen RNA in blood lysate using a bioassay using surface-enhanced Raman spectroscopy (SERS)-based detection integrated in a "lab-in-a-stick" portable device. Two levels of signal enhancement were employed to achieve the sensitivity required for direct detection...
March 6, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29505599/phosphoethanolamine-n-methyltransferase-is-a-potential-biomarker-for-the-diagnosis-of-p-knowlesi-and-p-falciparum-malaria
#11
Robert G E Krause, J P Dean Goldring
BACKGROUND: Plasmodium knowlesi is recognised as the main cause of human malaria in Southeast Asia. The disease is often misdiagnosed as P. falciparum or P. malariae infections by microscopy, and the disease is difficult to eliminate due to its presence in both humans and monkeys. P. knowlesi infections can rapidly cause severe disease and require prompt diagnosis and treatment. No protein biomarker exists for the rapid diagnostic test (RDT) detection of P. knowlesi infections. Plasmodium knowlesi infections can be diagnosed by PCR...
2018: PloS One
https://www.readbyqxmd.com/read/29499522/the-social-role-of-c-reactive-protein-point-of-care-testing-to-guide-antibiotic-prescription-in-northern-thailand
#12
Marco J Haenssgen, Nutcha Charoenboon, Thomas Althaus, Rachel C Greer, Daranee Intralawan, Yoel Lubell
New and affordable point-of-care testing (POCT) solutions are hoped to guide antibiotic prescription and to help limit antimicrobial resistance (AMR)-especially in low- and middle-income countries where resource constraints often prevent extensive diagnostic testing. Anthropological and sociological research has illuminated the role and impact of rapid point-of-care malaria testing. This paper expands our knowledge about the social implications of non-malarial POCT, using the case study of a C-reactive-protein point-of-care testing (CRP POCT) clinical trial with febrile patients at primary-care-level health centres in Chiang Rai province, northern Thailand...
February 23, 2018: Social Science & Medicine
https://www.readbyqxmd.com/read/29478773/in-vitro-culture-drug-sensitivity-and-transcriptome-of-plasmodium-vivax-hypnozoites
#13
Nil Gural, Liliana Mancio-Silva, Alex B Miller, Ani Galstian, Vincent L Butty, Stuart S Levine, Rapatbhorn Patrapuvich, Salil P Desai, Sebastian A Mikolajczak, Stefan H I Kappe, Heather E Fleming, Sandra March, Jetsumon Sattabongkot, Sangeeta N Bhatia
The unique relapsing nature of Plasmodium vivax infection is a major barrier to malaria eradication. Upon infection, dormant liver-stage forms, hypnozoites, linger for weeks to months and then relapse to cause recurrent blood-stage infection. Very little is known about hypnozoite biology; definitive biomarkers are lacking and in vitro platforms that support phenotypic studies are needed. Here, we recapitulate the entire liver stage of P. vivax in vitro, using a multiwell format that incorporates micropatterned primary human hepatocyte co-cultures (MPCCs)...
February 6, 2018: Cell Host & Microbe
https://www.readbyqxmd.com/read/29462970/approaches-for-reducing-the-risk-of-early-life-iron-deficiency-induced-brain-dysfunction-in-children
#14
REVIEW
Sarah E Cusick, Michael K Georgieff, Raghavendra Rao
Iron deficiency is the most common micronutrient deficiency in the world. Women of reproductive age and young children are particularly vulnerable. Iron deficiency in late prenatal and early postnatal periods can lead to long-term neurobehavioral deficits, despite iron treatment. This may occur because screening and treatment of iron deficiency in children is currently focused on detection of anemia and not neurodevelopment. Anemia is the end-stage state of iron deficiency. The brain becomes iron deficient before the onset of anemia due to prioritization of the available iron to the red blood cells (RBCs) over other organs...
February 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29448936/chitinase-3-like-1-is-a-biomarker-of-acute-kidney-injury-and-mortality-in-paediatric-severe-malaria
#15
Andrea L Conroy, Michael T Hawkes, Robyn Elphinstone, Robert O Opoka, Sophie Namasopo, Christopher Miller, Chandy C John, Kevin C Kain
BACKGROUND: Chitinase-3-like 1 (CHI3L1) is a glycoprotein elevated in paediatric severe malaria, and an emerging urinary biomarker of acute kidney injury (AKI). Based on the hypothesis that elevated CHI3L1 levels in malaria are associated with disease severity, the relationship between plasma CHI3L1 levels, AKI and mortality was investigated in Ugandan children enrolled in a clinical trial evaluating inhaled nitric oxide (iNO) as an adjunctive therapy for severe malaria. METHODS: Plasma CHI3L1 levels were measured daily for 4 days in children admitted to hospital with severe malaria and at day 14 follow up...
February 15, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29425228/kshv-oral-shedding-and-plasma-viremia-result-in-significant-changes-in-the-extracellular-tumorigenic-mirna-expression-profile-in-individuals-infected-with-the-malaria-parasite
#16
Minako Ikoma, Soren Gantt, Corey Casper, Yuko Ogata, Qing Zhang, Ryan Basom, Michael R Dyen, Timothy M Rose, Serge Barcy
Kaposi's sarcoma herpesvirus (KSHV) is the etiological agent of Kaposi's sarcoma (KS). Both KSHV and HIV infections are endemic in Uganda, where KS is among the most common cancers in HIV-infected individuals. Recent studies examined the use of small RNAs as biomarkers of disease, including microRNAs (miRNAs), with viral and tumor-derived miRNAs being detected in exosomes from individuals with KSHV-associated malignancies. In the current study, the host and viral extracellular mature miRNA expression profiles were analyzed in blood of KS-negative individuals in Uganda, comparing those with or without KSHV detectable from the oropharynx...
2018: PloS One
https://www.readbyqxmd.com/read/29415208/breathprinting-reveals-malaria-associated-biomarkers-and-mosquito-attractants
#17
Chad L Schaber, Nalin Katta, Lucy B Bollinger, Mwawi Mwale, Rachel Mlotha-Mitole, Indi Trehan, Barani Raman, Audrey R Odom John
Current evidence suggests that malaria infection could alter patient breath metabolites, a phenomenon that could be exploited to create a breath-based diagnostic test. However, no study has explored this in a clinical setting. To investigate whether natural human malaria infection leads to a characteristic breath profile, we performed a field study in Malawi. Breath volatiles from children with and without uncomplicated falciparum malaria were analyzed by thermal desorption-gas chromatography/mass spectrometry...
February 3, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29410111/an-aptamer-enabled-dna-nanobox-for-protein-sensing
#18
Marco S L Tang, Simon Chi-Chin Shiu, Maia Godonoga, Yee-Wai Cheung, Shaolin Liang, Roderick M Dirkzwager, Andrew B Kinghorn, Lewis A Fraser, Jonathan G Heddle, Julian A Tanner
DNA nanostructures can show dynamic responses to molecular triggers for a wide variety of applications. Whilst DNA sequence signal triggers are now well-established, there is a critical need for a broader diversity of molecular triggers to drive dynamic responses in DNA nanostructures. DNA aptamers are ideal; they can both seamlessly integrate into DNA nanostructure scaffolds and transduce molecular recognition into functional responses. Here, we report construction and optimization of a DNA origami nanobox locked by a pair of DNA double strands where one strand is a DNA aptamer targeting the malaria biomarker protein Plasmodium falciparum lactate dehydrogenase...
January 30, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29376251/-current-advance-in-cerebral-malaria
#19
Jian-Liang Li, Kai Li, Yuan Guo, Zheng Zhao, Li-Na Chen, Xiao-Hui Jiang, Yu-Jie Li, Ya Tu, Xiao-Jun Zheng
Cerebral malaria (CM), a severe neurological syndrome caused by Plasmodium falciparum infection, is a serious life-threatening disease with a high mortality. Survivors' persistent brain injury is manifested as long-term neurocognitive disorders. The main neuropathological feature of CM is the sequestration of parasited red blood cells (pRBCs) in cerebral microvessels. Other neuropathological features of CM include petechial hemorrhage in the brain parenchyma, annular hemorrhage, extensive brain endothelial cell activation, and focal endothelial cell injury and necrosis...
December 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29363447/emerging-pyrethroid-resistance-among-anopheles-arabiensis-in-kenya
#20
Elizabeth Hemming-Schroeder, Stephanie Strahl, Eugene Yang, Amanda Nguyen, Eugenia Lo, Daibin Zhong, Harrysone Atieli, Andrew Githeko, Guiyun Yan
Vector control programs, particularly in the form of insecticide-treated bed nets (ITNs), are essential for achieving malaria elimination goals. Recent reports of increasing knockdown resistance ( kdr ) mutation frequencies for Anopheles arabiensis in Western Kenya heightens the concern on the future effectiveness of ITNs in Kenya. We examined resistance in An. arabiensis populations across Kenya through kdr mutations and World Health Organization-recommended bioassays. We detected two kdr alleles, L1014F and L1014S...
March 2018: American Journal of Tropical Medicine and Hygiene
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