keyword
MENU ▼
Read by QxMD icon Read
search

Malarial protein

keyword
https://www.readbyqxmd.com/read/27923179/structural-dynamics-of-casein-kinase-i-cki-from-malarial-parasite-plasmodium-falciparum-isolate-3d7-insights-from-theoretical-modelling-and-molecular-simulations
#1
Budheswar Dehury, Santosh Kumar Behera, Namita Mahapatra
The protein kinases (PKs), belonging to serine/threonine kinase (STKs), are important drug targets for a wide spectrum of diseases in human. Among protein kinases, the Casein Kinases (CKs) are vastly expanded in various organisms, where, the malarial parasite Plasmodium falciparum possesses a single member i.e., PfCKI, which can phosphorylate various proteins in parasite extracts in vitro condition. But, the structure-function relationship of PfCKI and dynamics of ATP binding is yet to be understood. Henceforth, an attempt was made to study the dynamics, stability, and ATP binding mechanisms of PfCKI through computational modelling, docking, molecular dynamics (MD) simulations, and MM/PBSA binding free energy estimation...
November 21, 2016: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/27912758/emerging-polymorphisms-in-falciparum-kelch-13-gene-in-northeastern-region-of-india
#2
Neelima Mishra, Ram Suresh Bharti, Prashant Mallick, Om Prakash Singh, Bina Srivastava, Roma Rana, Sobhan Phookan, Hardev Prasad Gupta, Pascal Ringwald, Neena Valecha
BACKGROUND: Recent reports of emergence and spread of artemisinin resistance in the Southeast Asia region, including Myanmar, pose a greater threat to malaria control and elimination in India. Whole genome sequencing studies have associated mutations in the K13 propeller gene (k13), PF3D7_1343700 with artemisinin resistance both in vitro and in vivo. The aim of the present study was to find the k13 gene polymorphisms in Plasmodium falciparum parasites from the three sites in the Northeast region of India, bordering Bangladesh and Myanmar...
December 3, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27903279/in-vitro-and-in-vivo-anti-malarial-activity-of-novel-harmine-analog-heat-shock-protein-90-inhibitors-a-possible-partner-for-artemisinin
#3
Abebe Genetu Bayih, Asongna Folefoc, Abu Naser Mohon, Scott Eagon, Marc Anderson, Dylan R Pillai
BACKGROUND: The emergence of artemisinin-resistant Plasmodium falciparum strains poses a serious challenge to the control of malaria. This necessitates the development of new anti-malarial drugs. Previous studies have shown that the natural beta-carboline alkaloid harmine is a promising anti-malarial agent targeting the P. falciparum heat-shock protein 90 (PfHsp90). The aim of this study was to test the anti-malarial activity of harmine analogues. METHODS: Forty-two harmine analogues were synthesized and the binding of these analogues to P...
December 1, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27873143/regulation-of-rac1-gtpase-activity-by-quinine-through-g-protein-and-bitter-taste-receptor-t2r4
#4
Crystal Sidhu, Appalaraju Jaggupilli, Prashen Chelikani, Rajinder P Bhullar
Rac1 belongs to the Rho family of small GTPases and regulates actin cytoskeleton reorganization. T2R4 is a bitter taste receptor belonging to the G protein-coupled receptor family of proteins. In addition to mediating bitter taste perception from the tongue, T2R4s are found in extra-oral tissues, e.g., nasal epithelium, airways, brain, testis suggesting a much broader physiological function for these receptors. Anti-malarial drug and a bitter tasting compound, quinine, is a known agonist for T2R4, whereas BCML (Nα,Nα-Bis(carboxymethyl)-L-lysine) acts as an inverse agonist...
November 22, 2016: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/27814577/identification-of-natural-peptides-as-a-new-class-of-antimalarial-drugs-by-in-silico-approaches
#5
Ramar Perumal Samy, Sok Lin Foo, Octavio L Franco, Bradley G Stiles, Alan P Kumar, Gautam Sethi, Lina Hk Lim
Malaria is one of the most widespread and serious parasitic diseases worldwide. Currently available antimalarial drugs have side effects, and many strains of Plasmodia have developed resistance to such drugs. The present review examines the use of annexins and of natural peptides from snake venom as a new class of anti-malarial agents, with the key property of reducing inflammation. Severe cases of malaria manifest elevated serum levels of liver enzymes, inflammation, fibrin deposition, apoptosis, and reduction in peripheral CD8(+) T cells...
January 1, 2017: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/27806730/comparative-physiological-plasticity-to-desiccation-in-distinct-populations-of-the-malarial-mosquito-anopheles-coluzzii
#6
K Hidalgo, D Siaussat, V Braman, K R Dabiré, F Simard, K Mouline, D Renault
BACKGROUND: In West Africa, populations of the malaria vector mosquito, Anopheles coluzzii, are seasonally exposed to strong desiccating conditions during the dry season. Their dynamics strictly follows the pace of the availability of suitable larval development sites (water collections). Accordingly, mosquitoes can reproduce all year long where permanent breeding is possible, or stop reproduction and virtually disappear at the onset of the dry season when surface water dries up, like observed in temporary habitats of dry savannah areas...
November 2, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27806725/the-effect-of-malaria-and-anti-malarial-drugs-on-skeletal-and-cardiac-muscles
#7
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/27799332/ph-alkalinization-by-chloroquine-suppresses-pathogenic-burkholderia-t6ss-1-and-multi-nucleated-giant-cells
#8
Jennifer Chua, Jeffrey L Senft, Stephen J Lockett, Paul J Brett, Mary N Burtnick, David DeShazer, Arthur M Friedlander
Burkholderia mallei and B. pseudomallei cause glanders and melioidosis, respectively, in humans and animals. A hallmark of pathogenesis is formation of granulomas containing multi-nucleated giant cells (MNGCs) and cell death. These processes depend on the Type 6 secretion system-1 (T6SS-1), which is required for virulence in animals. We examined the cell biology of MNGC formation and cell death. We found that chloroquine (CLQ), an anti-malarial drug, inhibits Burkholderia growth, phagosomal escape and subsequent MNGC formation...
October 31, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27793909/attenuation-of-colchicine-toxicity-in-drug-resistant-cancer-cells-by-co-treatment-with-anti-malarial-drugs
#9
Ae-Ran Choi, Ju-Hwa Kim, Ji Hyun Cheon, Hyung Sik Kim, Sungpil Yoon
BACKGROUND/AIM: Colchicine (COL) is a well-known and potent microtubule targeting anticancer agent. The purpose of our study was to identify conditions that increase sensitization of COL-resistant cancer cells that overexpress P-glycoprotein (P-gp). MATERIALS AND METHODS: The anti-malarial drugs chloroquine (CHL), mefloquine (MEF) and primaquine (PRI) have been shown to increase sensitization in drug-resistant KBV20C cells via P-gp inhibition. Therefore, we tested whether co-treatment of COL with PRI, CHL or MEF increases sensitivity in COL-resistant KBV20C cells over that of cells treated with COL alone and whether these effects are attributable to P-gp activity...
November 2016: Anticancer Research
https://www.readbyqxmd.com/read/27788475/the-pharmacological-stimulation-of-nurr1-improves-cognitive-functions-via-enhancement-of-adult-hippocampal-neurogenesis
#10
Jin-Il Kim, Seong Gak Jeon, Kyoung Ah Kim, Yong Jun Kim, Eun Ji Song, Junghyun Choi, Kyu Jeung Ahn, Chong-Jin Kim, Ho Yeon Chung, Minho Moon, Hyunju Chung
The nuclear receptor related-1 (Nurr1) protein plays an important role in both the development of neural precursor cells (NPCs) and cognitive functions. Despite its relevance, the effects of Nurr1 on adult hippocampal neurogenesis have not been thoroughly investigated. Here we used RT-PCR, western blot, and immunocytochemistry to show that adult hippocampal NPCs abundantly express Nurr1. We then examined the effect of Nurr1 activation on adult hippocampal NPCs using amodiaquine (AQ), an anti-malarial drug that was recently discovered to be a Nurr1 agonist...
September 28, 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27773616/compartmentalized-metabolic-engineering-for-artemisinin-biosynthesis-and-effective-malaria-treatment-by-oral-delivery-of-plant-cells
#11
Karan Malhotra, Mayavan Subramaniyan, Khushboo Rawat, Md Kalamuddin, M Irfan Qureshi, Pawan Malhotra, Asif Mohmmed, Katrina Cornish, Henry Daniell, Shashi Kumar
Artemisinin is highly effective against drug-resistant malarial parasites, which affects nearly half of the global population and kills >500 000 people each year. The primary cost of artemisinin is the very expensive process used to extract and purify the drug from Artemisia annua. Elimination of this apparently unnecessary step will make this potent antimalarial drug affordable to the global population living in endemic regions. Here we reported the oral delivery of a non-protein drug artemisinin biosynthesized (∼0...
November 7, 2016: Molecular Plant
https://www.readbyqxmd.com/read/27769430/simultaneous-capture-and-sequential-detection-of-two-malarial-biomarkers-on-magnetic-microparticles
#12
Christine F Markwalter, Keersten M Ricks, Anna L Bitting, Lwiindi Mudenda, David W Wright
We have developed a rapid magnetic microparticle-based detection strategy for malarial biomarkers Plasmodium lactate dehydrogenase (pLDH) and Plasmodium falciparum histidine-rich protein II (PfHRPII). In this assay, magnetic particles functionalized with antibodies specific for pLDH and PfHRPII as well as detection antibodies with distinct enzymes for each biomarker are added to parasitized lysed blood samples. Sandwich complexes for pLDH and PfHRPII form on the surface of the magnetic beads, which are washed and sequentially re-suspended in detection enzyme substrate for each antigen...
December 1, 2016: Talanta
https://www.readbyqxmd.com/read/27738107/disrupting-the-allosteric-interaction-between-the-plasmodium-falciparum-camp-dependent-kinase-and-its-regulatory-subunit
#13
Dene R Littler, Hayley E Bullen, Katherine L Harvey, Travis Beddoe, Brendan S Crabb, Jamie Rossjohn, Paul R Gilson
The ubiquitous second messenger cAMP mediates signal transduction processes in the malarial parasite that regulate host erythrocyte invasion and the proliferation of merozoites. In Plasmodium falciparum, the central receptor for cAMP is the single regulatory subunit (R) of protein kinase A (PKA). To aid the development of compounds that can selectively dysregulate parasite PKA signaling, we solved the structure of the PKA regulatory subunit in complex with cAMP and a related analogue that displays antimalarial activity, (Sp)-2-Cl-cAMPS...
December 2, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27732881/receptor-for-activated-c-kinase-1-pfrack1-is-required-for-plasmodium-falciparum-intra-erythrocytic-proliferation
#14
Karin Blomqvist, Christen DiPetrillo, Vincent A Streva, Stewart Pine, Jeffrey D Dvorin
Emerging resistance to current anti-malarials necessitates a more detailed understanding of the biological processes of Plasmodium falciparum proliferation, thus allowing identification of new drug targets. The well-conserved protein Receptor for Activated C-Kinase 1 (RACK1) was originally identified in mammalian cells as an anchoring protein for protein kinase C (PKC) and has since been shown to be important for cell migration, cytokinesis, transcription, epigenetics, and protein translation. The P. falciparum ortholog, PfRACK1, is expressed in blood stages of the parasite and is diffusely localized in the parasite cytoplasm...
October 11, 2016: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/27718558/a-novel-methodology-for-bioenergetic-analysis-of-plasmodium-falciparum-reveals-a-glucose-regulated-metabolic-shift-and-enables-mode-of-action-analyses-of-mitochondrial-inhibitors
#15
Tomoyo Sakata-Kato, Dyann F Wirth
Given that resistance to all drugs in clinical use has arisen, discovery of new antimalarial drug targets is eagerly anticipated. The Plasmodium mitochondrion has been considered a promising drug target largely based on its significant divergence from the host organelle as well as its involvement in ATP production and pyrimidine biosynthesis. However, the functions of Plasmodium mitochondrial protein complexes and associated metabolic pathways are not fully characterized. Here, we report the development of novel and robust bioenergetic assay protocols for Plasmodium falciparum asexual parasites utilizing a Seahorse Bioscience XFe24 Extracellular Flux Analyzer...
December 9, 2016: ACS Infectious Diseases
https://www.readbyqxmd.com/read/27696532/uptake-of-parasite-derived-vesicles-by-astrocytes-and-microglial-phagocytosis-of-infected-erythrocytes-may-drive-neuroinflammation-in-cerebral-malaria
#16
Sandeep K Shrivastava, Esther Dalko, Delphine Delcroix-Genete, Fabien Herbert, Pierre-André Cazenave, Sylviane Pied
Astrocytes and microglia are activated during cerebral malaria (CM) and contribute to the production and release of several mediators during neuroinflammatory processes. Whether these changes are the consequence of a direct crosstalk between glial cells and the malarial parasite and how these cells participate in the pathogenesis of CM is not yet clear. We therefore examined the interaction of astrocytes and microglia with Plasmodium berghei ANKA-infected red blood cells using primary cell cultures derived from newborn C57BL/6 mice...
October 3, 2016: Glia
https://www.readbyqxmd.com/read/27684745/differing-causes-of-lactic-acidosis-and-deep-breathing-in-cerebral-malaria-and-severe-malarial-anemia-may-explain-differences-in-acidosis-related-mortality
#17
Nathan R Brand, Robert O Opoka, Karen E S Hamre, Chandy C John
Lactic acidosis (LA) is a marker for mortality in severe malaria, but the mechanisms that lead to LA in the different types of severe malaria and the extent to which LA-associated mortality differs by type of severe malaria are not well described. We assessed the frequency of LA in children admitted to Mulago Hospital, Kampala, Uganda with cerebral malaria (CM, n = 193) or severe malarial anemia (SMA, n = 216). LA was compared to mortality and measures of parasite biomass and sequestration (P. falciparum histidine-rich protein-2 (PfHRP2) concentration, platelet count), and to a measure of systemic tissue oxygen delivery (hemoglobin level)...
2016: PloS One
https://www.readbyqxmd.com/read/27678060/characterization-of-aspartyl-aminopeptidase-from-toxoplasma-gondii
#18
Jun Zheng, Ziying Cheng, Honglin Jia, Yonghui Zheng
Aminopeptidases have emerged as new promising drug targets for the development of novel anti-parasitic drugs. An aspartyl aminopeptidase-like gene has been identified in the Toxoplasma gondii genome (TgAAP), although its function remains unknown. In this study, we characterized TgAAP and performed functional analysis of the gene product. Firstly, we expressed a functional recombinant TgAAP (rTgAAP) protein in Escherichia coli, and found that it required metal ions for activity and showed a substrate preference for N-terminal acidic amino acids Glu and Asp...
September 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27669021/salivary-gland-proteome-during-adult-development-and-after-blood-feeding-of-female-anopheles-dissidens-mosquitoes-diptera-culicidae
#19
Benjarat Phattanawiboon, Narissara Jariyapan, Chonlada Mano, Sittiruk Roytrakul, Atchara Paemanee, Sriwatapron Sor-Suwan, Patchara Sriwichai, Atiporn Saeung, Paul A Bates
Understanding changes in mosquito salivary proteins during the time that sporozoite maturation occurs and after blood feeding may give information regarding the roles of salivary proteins during the malarial transmission. Anopheles dissidens (formerly Anopheles barbirostris species A1) is a potential vector of Plasmodium vivax in Thailand. In this study, analyses of the proteomic profiles of female An. dissidens salivary glands during adult development and after blood feeding were carried out using two-dimensional gel electrophoresis coupled with nano-liquid chromatography-mass spectrometry...
2016: PloS One
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
#20
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
keyword
keyword
65169
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"