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https://www.readbyqxmd.com/read/28551901/-the-role-of-the-plant-artemisia-in-survival-and-induction-of-apoptosis-of-b-cells-in-chronic-lymphocytic-leukemia-cll
#1
Vita Mirkin, Alain Berrebi, Igor Rakhman, Michal Haran, Lev Shvidel
BACKGROUND: The cytotoxic effect of plants such as green tea and turmeric (curcumin) on B chronic lymphocytic leukemia (CLL) cells has been established. The plant Artemisia has been used in China for anti-cancer and anti-malaria applications. In Israel, Artemisia absinthium ("the Chiba") is used to release abdominal pain. In attempts to evaluate the cytotoxic effect of this plant in CLL cells, we prepared a decoction of Artemisia leaves and after filtration used it as an inducer of apoptosis of B CLL cells...
February 2017: Harefuah
https://www.readbyqxmd.com/read/28549910/naturally-acquired-immune-responses-to-thrombospondin-related-adhesion-protein-trap-of-plasmodium-vivax-in-patients-from-areas-of-unstable-malaria-transmission
#2
Saeed Nazeri, Sedigheh Zakeri, Akram Abouie Mehrizi, Navid Dinparast Djadid
A key tool for the control, elimination, and eradication of Plasmodium vivax is the development of an effective vaccine. The thrombospondin-related adhesion protein (TRAP) is one of the major sporozoite antigens that plays an important role in the invasion of mosquito salivary glands and hepatocytes by sporozoites. The main goal of this study was to evaluate the naturally acquired antibodies to the P. vivax TRAP (PvTRAP) in patients from malaria-endemic areas of Iran (n=116), Afghanistan (n=50), and Pakistan (n=50)...
May 23, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28549888/synthesis-of-n%C3%AE-vel-artemisinin-dimers-with-polyamine-linkers-and-evaluation-of-their-potential-as-anticancer-agents
#3
George E Magoulas, Tzoanna Tsigkou, Lina Skondra, Margarita Lamprou, Panagiota Tsoukala, Vassiliki Kokkinogouli, Evangelia Pantazaka, Dionissios Papaioannou, Constantinos M Athanassopoulos, Evangelia Papadimitriou
The natural product artemisinin and derivatives thereof are currently considered as the drugs of choice for the treatment of malaria. At the same time, a significant number of such drugs have also shown interesting anticancer activity. In the context of the present research work, artemisinin was structurally modified and anchored to naturally occurring polyamines to afford new artemisinin dimeric conjugates whose potential anticancer activity was evaluated. All artemisinin conjugates tested were more effective than artemisinin itself in decreasing the number of MCF7 breast cancer cells...
May 10, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28549854/an-empirical-review-of-antimalarial-quality-field-surveys-the-importance-of-characterising-outcomes
#4
REVIEW
James Grech, James Robertson, Jackson Thomas, Gabrielle Cooper, Mark Naunton, Tamsin Kelly
For decades, thousands of people have been dying from malaria infections because of poor-quality medicines (PQMs). While numerous efforts have been initiated to reduce their presence, PQMs are still risking the lives of those seeking treatment. This review addresses the importance of characterising results of antimalarial medicine field surveys based upon the agreement of clearly defined definitions. Medicines found to be of poor quality can be falsified or counterfeit, substandard or degraded. The distinction between these categories is important as each category requires a different countermeasure...
May 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28549586/critical-role-of-hla-dr%C3%AE-binding-peptides-peripheral-flanking-residues-in-fully-protective-malaria-vaccine-development
#5
César Reyes, Rocío Rojas-Luna, Jorge Aza-Conde, Luisa Tabares, Manuel A Patarroyo, Manuel E Patarroyo
A vaccine candidate component must fit perfectly into the antigen presenting HLA-DRβ* molecule's groove (or canonical nonapeptide) peptide binding region (PBR) during antigen presentation for proper presentation to the T-cell receptor (TCR), conforming a specific and stable macromolecular complex and induce an appropriate immune response. Antigen's peripheral flanking residues (PFR, positions (p) -p2 and p10) must thus establish strong interactions with the HLA-DRβ* - TCR complex. These amino acids (aa) have specific physico-chemical characteristics enabling differentiation between non-protective but antibody-inducer (NPAI), short-lived protection inducer (SLPI) and long-lasting protection inducer (LLPI) peptides when used as an antimalarial vaccine component...
May 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28549431/insecticide-treated-nets-provide-protection-against-malaria-to-children-in-an-area-of-insecticide-resistance-in-southern-benin
#6
John Bradley, Aurore Ogouyèmi-Hounto, Sylvie Cornélie, Jacob Fassinou, Yolande Sissinto Savi de Tove, Adicath Adéola Adéothy, Filémon T Tokponnon, Patrick Makoutode, Alioun Adechoubou, Thibaut Legba, Telesphore Houansou, Dorothée Kinde-Gazard, Martin C Akogbeto, Achille Massougbodji, Tessa Bellamy Knox, Martin Donnelly, Immo Kleinschmidt
BACKGROUND: Malaria control is heavily reliant on insecticides, especially pyrethroids. Resistance of mosquitoes to insecticides may threaten the effectiveness of insecticide-based vector control and lead to a resurgence of malaria in Africa. METHODS: In 21 villages in Southern Benin with high levels of insecticide resistance, the resistance status of local vectors was measured at the same time as the prevalence of malaria infection in resident children. RESULTS: Children who used LLINs had lower levels of malaria infection [odds ratio = 0...
May 26, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28549426/effect-of-iptp-on-plasmodium-falciparum-antibody-levels-among-pregnant-women-and-their-babies-in-a-sub-urban-coastal-area-in-ghana
#7
Judith K Stephens, Eric Kyei-Baafour, Emmanuel K Dickson, Jones K Ofori, Michael F Ofori, Mark L Wilson, Isabella A Quakyi, Bartholomew D Akanmori
BACKGROUND: Women exposed to Plasmodium infection develop antibodies and become semi-immune. This immunity is suppressed during pregnancy making both the pregnant woman and the foetus vulnerable to the adverse effects of malaria, particularly by Plasmodium falciparum. Intermittent preventive treatment of malaria in pregnancy (IPTp) with Sulfadoxine-pyrimethamine (SP) tablets is one of the current interventions to mitigate the effects of malaria on both the pregnant woman and the unborn child...
May 26, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28549390/clinical-and-molecular-monitoring-of-plasmodium-falciparum-resistance-to-antimalarial-drug-artesunate-sulphadoxine-pyrimethamine-in-two-highly-malarious-district-of-madhya-pradesh-central-india-from-2012-2014
#8
Sweta Mishra, Praveen K Bharti, Man M Shukla, Nazia A Ali, Sher S Kashyotia, Avdhesh Kumar, Akshay C Dhariwal, Neeru Singh
The spread of P. falciparum resistant strain has led to a significant resurgence of malaria morbidity and mortality. The current cornerstone in malaria treatment in India is Artemisinin based Combination (Artesunate + Sulphadoxine-Pyrimethamine) Therapy (ACT) for treatment of uncomplicated P. falciparum malaria since 2010. In the present study we assessed the therapeutic efficacy of ACT and molecular monitoring of antimalarial resistance. Therapeutic efficacy was determined by in vivo method using 28 days follow-up...
May 26, 2017: Pathogens and Global Health
https://www.readbyqxmd.com/read/28549173/incidental-mosquitocidal-effect-of-an-ivermectin-mass-drug-administration-on-anopheles-farauti-conducted-for-scabies-control-in-the-solomon-islands
#9
Christian Kositz, Jeptah Talina, Jason Diau, Rowena Asugeni, Cheryl Whitehorn, David Mabey, Carlos Chaccour, Michael Marks
Background: The Solomon Islands is targeting elimination of malaria by 2030. The dominant vector is the predominantly exophagic, exophilic Anopheles farauti sensu strictu. This biting behaviour limits the efficacy of conventional vector control tools and highlights the need for new strategies. When administered to humans ivermectin has been shown to have a mosquitocidal effect. Mass drug administration (MDA) with ivermectin is an emerging strategy in the control of scabies. In this study we explored any incidental effect of ivermectin MDA conducted for scabies control on mosquitoes...
May 26, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28548247/market-for-artemether-lumefantrine-to-treat-childhood-malaria-in-a-district-of-southern-mozambique
#10
Sergi Alonso, Khátia Munguambe, Elisa Sicuri
Malaria is one of the leading causes of death in sub-Saharan Africa. Artemisinin-based combination therapies are used as first-line treatment drugs, but their market is far from competitive. Market failures include limited availability, low quality, lack of information, and high costs of access. We estimated the theoretical demand for one of the most common artemisinin-based combination therapies, artemether-lumefantrine (AL), and its determinants among caregivers of children with malaria seeking care at public health facilities, thus, entitled to receive drugs for free, in southern Mozambique (year 2012)...
May 26, 2017: Health Economics
https://www.readbyqxmd.com/read/28547798/a-tough-nut-to-crack-intracellular-detection-and-quantification-of-heme-in-malaria-parasites-by-a-genetically-encoded-protein-sensor
#11
Diana Imhof, Amelie Wißbrock
A genetically encoded protein sensor based on HRP2 was used to detect heme in the human malaria parasite Plasmodium falciparum using fluorescence-quenching after heme binding. Protein labels ECFP and EYFP were attached to the termini to allow for a FRET signal as the initial detection parameter before heme binding. The sensor was eventually used to investigate alterations of the labile heme pool during the parasite's life cycle as well as under the influence of the drug chloroquine.
May 26, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28546554/high-throughput-resistance-profiling-of-plasmodium-falciparum-infections-based-on-custom-dual-indexing-and-illumina-next-generation-sequencing-technology
#12
Sidsel Nag, Marlene D Dalgaard, Poul-Erik Kofoed, Johan Ursing, Marina Crespo, Lee O'Brien Andersen, Frank Møller Aarestrup, Ole Lund, Michael Alifrangis
Genetic polymorphisms in P. falciparum can be used to indicate the parasite's susceptibility to antimalarial drugs as well as its geographical origin. Both of these factors are key to monitoring development and spread of antimalarial drug resistance. In this study, we combine multiplex PCR, custom designed dual indexing and Miseq sequencing for high throughput SNP-profiling of 457 malaria infections from Guinea-Bissau, at the cost of 10 USD per sample. By amplifying and sequencing 15 genetic fragments, we cover 20 resistance-conferring SNPs occurring in pfcrt, pfmdr1, pfdhfr, pfdhps, as well as the entire length of pfK13, and the mitochondrial barcode for parasite origin...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28546518/safety-immunogenicity-and-cross-species-protection-of-a-plasmid-dna-encoding-plasmodium-falciparum-sera5-polypeptide-microbial-epitopes-and-chemokine-genes-in-mice-and-olive-baboons
#13
Nyamongo Onkoba, Ruth M Mumo, Horace Ochanda, Charles Omwandho, Hastings S Ozwara, Thomas G Egwang
Incorporation of biomolecular epitopes to malarial antigens should be explored in the development of strain-transcending malarial vaccines. The present study sought to determine safety, immunogenicity and cross-species efficacy ofPlasmodium falciparum serine repeat antigen 5 polypeptide co-expressed with epitopes of Bacille-Calmette Guerin (BCG), tetanus toxoid (TT) and a chemokine gene. Olive baboons and BALB/c mice were randomly assigned into vaccine and control groups. The vaccine group animals were primed and boosted twice with pIRES plasmids encoding the SERA5+ BCG+ TT alone, or with either CCL5 or CCL20 and the control group with pIRES plasmid vector backbone...
April 6, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28546104/development-of-a-paediatric-physiologically-based-pharmacokinetic-model-to-assess-the-impact-of-drug-drug-interactions-in-tuberculosis-co-infected-malaria-subjects-a-case-study-with-artemether-lumefantrine-and-the-cyp3a4-inducer-rifampicin
#14
Olusola Olafuyi, Michael Coleman, Raj K S Badhan
The fixed dosed combination of artemether and lumefantrine (AL) is widely used for the treatment of malaria in adults and children in sub-Sahara Africa, with lumefantrine day 7 concentrations being widely used as a marker for clinical efficacy. Both are substrates for CYP3A4 and susceptible to drug-drug interactions (DDIs); indeed, knowledge of the impact of these factors is currently sparse in paediatric population groups. Confounding malaria treatment is the co-infection of patients with tuberculosis. The concomitant treatment of AL with tuberculosis chemotherapy, which includes the CYP3A4 inducer rifampicin, increases the risk of parasite recrudescence and malaria treatment failure...
May 22, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28545674/-spontaneous-spleen-rupture-with-p-ovale-malaria
#15
S Mouline, H Naoui, F Nachite, M Oukabli, M Laroussi, A Zentar, B Lmimouni
No abstract text is available yet for this article.
May 22, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28545664/a-phenolic-glycoside-from-flacourtia-indica-induces-heme-mediated-oxidative-stress-in-plasmodium-falciparum-and-attenuates-malaria-pathogenesis-in-mice
#16
Shiv Vardan Singh, Ashan Manhas, Suriya P Singh, Sonali Mishra, Nimisha Tiwari, Parmanand Kumar, Karuna Shanker, Kumkum Srivastava, Koneni V Sashidhara, Anirban Pal
BACKGROUND: Flacourtia indica is especially popular among the various communities of many African countries where it is being used traditionally for the treatment of malaria. In our previous report, we have identified some phenolic glycosides from the aerial parts of F. indica as promising antiplasmodial agents under in vitro conditions. PURPOSE: Antimalarial bioprospection of F. indica derived phenolic glycoside in Swiss mice (in vivo) with special emphasis on its mode of action...
July 1, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28545595/modelling-the-influence-of-climate-on-malaria-occurrence-in-chimoio-municipality-mozambique
#17
João Luís Ferrão, Jorge M Mendes, Marco Painho
BACKGROUND: Mozambique was recently ranked fifth in the African continent for the number of cases of malaria. In Chimoio municipality cases of malaria are increasing annually, contrary to the decreasing trend in Africa. As malaria transmission is influenced to a large extent by climatic conditions, modelling this relationship can provide useful insights for designing precision health measures for malaria control. There is a scarcity of information on the association between climatic variability and malaria transmission risk in Mozambique in general, and in Chimoio in particular...
May 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28545590/effect-of-climatic-variability-on-malaria-trends-in-baringo-county-kenya
#18
Edwin K Kipruto, Alfred O Ochieng, Douglas N Anyona, Macrae Mbalanya, Edna N Mutua, Daniel Onguru, Isaac K Nyamongo, Benson B A Estambale
BACKGROUND: Malaria transmission in arid and semi-arid regions of Kenya such as Baringo County, is seasonal and often influenced by climatic factors. Unravelling the relationship between climate variables and malaria transmission dynamics is therefore instrumental in developing effective malaria control strategies. The main aim of this study was to describe the effects of variability of rainfall, maximum temperature and vegetation indices on seasonal trends of malaria in selected health facilities within Baringo County, Kenya...
May 25, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28545583/private-sector-role-readiness-and-performance-for-malaria-case-management-in-uganda-2015
#19
Henry Kaula, Peter Buyungo, Jimmy Opigo
BACKGROUND: Several interventions have been put in place to promote access to quality malaria case management services in Uganda's private sector, where most people seek treatment. This paper describes evidence using a mixed-method approach to examine the role, readiness and performance of private providers at a national level in Uganda. These data will be useful to inform strategies and policies for improving malaria case management in the private sector. METHODS: The ACTwatch national anti-malarial outlet survey was conducted concurrently with a fever case management study...
May 25, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28545579/evaluation-of-a-laboratory-quality-assurance-pilot-programme-for-malaria-diagnostics-in-low-transmission-areas-of-kenya-2013
#20
Elizabeth Wanja, Rachel Achilla, Peter Obare, Rose Adeny, Caroline Moseti, Victor Otieno, Collins Morang'a, Ephantus Murigi, John Nyamuni, Derek R Monthei, Bernhards Ogutu, Ann M Buff
BACKGROUND: One objective of the Kenya National Malaria Strategy 2009-2017 is scaling access to prompt diagnosis and effective treatment. In 2013, a quality assurance (QA) pilot was implemented to improve accuracy of malaria diagnostics at selected health facilities in low-transmission counties of Kenya. Trends in malaria diagnostic and QA indicator performance during the pilot are described. METHODS: From June to December 2013, 28 QA officers provided on-the-job training and mentoring for malaria microscopy, malaria rapid diagnostic tests and laboratory QA/quality control (QC) practices over four 1-day visits at 83 health facilities...
May 25, 2017: Malaria Journal
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