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https://www.readbyqxmd.com/read/27912876/in-vitro-and-ex-vivo-activity-of-an-azadirachta-indica-a-juss-seed-kernel-extract-on-early-sporogonic-development-of-plasmodium-in-comparison-with-azadirachtin-a-its-most-abundant-constituent
#1
Nisha Dahiya, Giuseppina Chianese, Solomon Mequanente Abay, Orazio Taglialatela-Scafati, Fulvio Esposito, Giulio Lupidi, Massimo Bramucci, Luana Quassinti, George Christophides, Annette Habluetzel, Leonardo Lucantoni
BACKGROUND: NeemAzal(®) (NA) is a quantified extract from seed kernels of neem, Azadirachta indica A.Juss. (Meliaceae), with a wide spectrum of biological properties, classically ascribed to its limonoid content. NA contains several azadirachtins (A to L), azadirachtin A (AzaA) being its main constituent. AzaA has been shown to inhibit microgamete formation of the rodent malaria parasite Plasmodium berghei, and NA was found to completely inhibit the transmission of Plasmodium berghei to Anopheles stephensi mosquitoes when administered to gametocytemic mice at a corresponding AzaA dose of 50mg/kg before exposure to mosquitoes...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27907215/cd8-t-cells-induce-fatal-brainstem-pathology-during-cerebral-malaria-via-luminal-antigen-specific-engagement-of-brain-vasculature
#2
Phillip A Swanson, Geoffrey T Hart, Matthew V Russo, Debasis Nayak, Takele Yazew, Mirna Peña, Shahid M Khan, Chris J Janse, Susan K Pierce, Dorian B McGavern
Cerebral malaria (CM) is a severe complication of Plasmodium falciparum infection that results in thousands of deaths each year, mostly in African children. The in vivo mechanisms underlying this fatal condition are not entirely understood. Using the animal model of experimental cerebral malaria (ECM), we sought mechanistic insights into the pathogenesis of CM. Fatal disease was associated with alterations in tight junction proteins, vascular breakdown in the meninges / parenchyma, edema, and ultimately neuronal cell death in the brainstem, which is consistent with cerebral herniation as a cause of death...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27905971/trends-causes-and-risk-factors-of-mortality-among-children-under-5-in-ethiopia-1990-2013-findings-from-the-global-burden-of-disease-study-2013
#3
Amare Deribew, Gizachew Assefa Tessema, Kebede Deribe, Yohannes Adama Melaku, Yihunie Lakew, Azmeraw T Amare, Semaw F Abera, Mesoud Mohammed, Abiy Hiruye, Efrem Teklay, Awoke Misganaw, Nicholas Kassebaum
BACKGROUND: Ethiopia has made remarkable progress in reducing child mortality over the last two decades. However, the under-5 mortality rate in Ethiopia is still higher than the under-5 mortality rates of several low- and middle-income countries (LMIC). On the other hand, the patterns and causes of child mortality have not been well investigated in Ethiopia. The objective of this study was to investigate the mortality trend, causes of death, and risk factors among children under 5 in Ethiopia during 1990-2013...
November 14, 2016: Population Health Metrics
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
#4
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/27905873/comparative-genomics-of-beauveria-bassiana-uncovering-signatures-of-virulence-against-mosquitoes
#5
Claudio A Valero-Jiménez, Luigi Faino, Daphne Spring In't Veld, Sandra Smit, Bas J Zwaan, Jan A L van Kan
BACKGROUND: Entomopathogenic fungi such as Beauveria bassiana are promising biological agents for control of malaria mosquitoes. Indeed, infection with B. bassiana reduces the lifespan of mosquitoes in the laboratory and in the field. Natural isolates of B. bassiana show up to 10-fold differences in virulence between the most and the least virulent isolate. In this study, we sequenced the genomes of five isolates representing the extremes of low/high virulence and three RNA libraries, and applied a genome comparison approach to uncover genetic mechanisms underpinning virulence...
December 1, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27905633/-failure-to-radical-cure-in-plasmodium-vivax-malaria
#6
Julián García, Agustín Seijo, Andrés Benchetrit, Esteban Couto, Sofía Echazarreta, Susana Lloveras, Tomás Orduna
Relapsing Plasmodium vivax malaria is due to activation of dormant intrahepatic parasitic forms known as hypnozoits. Primaquine is the only available drug effective against hypnozoits and, alongside a schizonticidal drug, constitutes the radical treatment of malaria. Failure of radical treatment is frequently attributed to inadequate dosing, poor adherence, or reinfection. However, several cases of radical treatment failure without these factors have been reported, inferring that metabolic properties of the host or tolerance mechanisms of the parasite may be implied...
August 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/27903593/respiratory-syncytial-virus-infection-detection-and-new-options-for-prevention-and-treatment
#7
REVIEW
Cameron Griffiths, Steven J Drews, David J Marchant
Respiratory syncytial virus (RSV) infection is a significant cause of hospitalization of children in North America and one of the leading causes of death of infants less than 1 year of age worldwide, second only to malaria. Despite its global impact on human health, there are relatively few therapeutic options available to prevent or treat RSV infection. Paradoxically, there is a very large volume of information that is constantly being refined on RSV replication, the mechanisms of RSV-induced pathology, and community transmission...
January 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/27903054/future-malaria-spatial-pattern-based-on-the-potential-global-warming-impact-in-south-and-southeast-asia
#8
Hassan M Khormi, Lalit Kumar
We used the Model for Interdisciplinary Research on Climate-H climate model with the A2 Special Report on Emissions Scenarios for the years 2050 and 2100 and CLIMEX software for projections to illustrate the potential impact of climate change on the spatial distributions of malaria in China, India, Indochina, Indonesia, and The Philippines based on climate variables such as temperature, moisture, heat, cold and dryness. The model was calibrated using data from several knowledge domains, including geographical distribution records...
November 21, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27899329/plasmodium-vivax-vaccine-research-we-ve-only-just-begun
#9
REVIEW
Wai-Hong Tham, James G Beeson, Julian C Rayner
Plasmodium vivax parasites cause the majority of malaria cases outside Africa, and are increasingly being acknowledged as a cause of severe disease. The unique attributes of P. vivax biology, particularly the capacity of the dormant liver stage, the hypnozoite, to maintain blood-stage infections even in the absence of active transmission, make blood-stage vaccines particularly attractive for this species. However, P. vivax vaccine development remains resolutely in first gear, with only a single blood-stage candidate having been evaluated in any depth...
November 27, 2016: International Journal for Parasitology
https://www.readbyqxmd.com/read/27895939/malaria-moderate-to-severe-anaemia-and-malarial-anaemia-in-children-at-presentation-to-hospital-in-the-mount-cameroon-area-a-cross-sectional-study
#10
Irene Ule Ngole Sumbele, Sharon Odmia Sama, Helen Kuokuo Kimbi, Germain Sotoing Taiwe
Background. Malaria remains a major killer of children in Sub-Saharan Africa, while anaemia is a public health problem with significant morbidity and mortality. Examining the factors associated with moderate to severe anaemia (MdSA) and malarial anaemia as well as the haematological characteristics is essential. Methodology. Children (1-14 years) at presentation at the Regional Hospital Annex-Buea were examined clinically and blood samples were collected for malaria parasite detection and full blood count evaluation...
2016: Anemia
https://www.readbyqxmd.com/read/27895843/severe-anemia-in-malawian-children
#11
Job Cj Calis, Kamija S Phiri, E Brian Faragher, Bernard J Brabin, Imelda Bates, Luis E Cuevas, Rob J de Haan, Ajib I Phiri, Pelani Malange, Mirriam Khoka, Paul Jm Hulshof, Lisette van Lieshout, Marcel Ghm Beld, Yik Y Teo, Kirk A Rockett, Anna Richardson, Dominic P Kwiatkowski, Malcolm E Molyneux, Michaël Boele van Hensbroek
BACKGROUND: Severe anemia is a major cause of sickness and death in African children, yet the causes of anemia in this population have been inadequately studied. METHODS: We conducted a case-control study of 381 preschool children with severe anemia (hemoglobin concentration, <5.0 g per deciliter) and 757 preschool children without severe anemia in urban and rural settings in Malawi. Causal factors previously associated with severe anemia were studied. The data were examined by multivariate analysis and structural equation modeling...
September 2016: Malawi Medical Journal: the Journal of Medical Association of Malawi
https://www.readbyqxmd.com/read/27895526/development-of-a-simple-and-specific-direct-competitive-elisa-for-the-determination-of-artesunate-using-an-anti-artesunate-polyclonal-antiserum
#12
Yoshinori Mitsui
BACKGROUND: Since artesunate (ART) became a vital component of artemisinin (ARM)-based combination therapies for the treatment for malaria, counterfeit ART drugs have spread in regions of Southeast Asia and Africa. The consumption of counterfeit ART drugs has resulted in the death of many patients. Thus, evaluating the quality of ART drugs is needed. There are several methods for quantitating the ART content in tablets, the most common being a high-performance liquid chromatography. However, that method is hampered by the need for expensive equipment and a rather time-consuming process of extraction...
2016: Tropical Medicine and Health
https://www.readbyqxmd.com/read/27895022/inhibition-of-plasmodium-liver-infection-by-ivermectin
#13
António M Mendes, Inês S Albuquerque, Marta Machado, Joana Pissarra, Patrícia Meireles, Miguel Prudêncio
Avermectins are powerful endectocides with an established potential to reduce the incidence of vector-borne diseases. Here, we show that several avermectins inhibit the hepatic stage of Plasmodium infection in vitro Notably, ivermectin potently inhibits liver infection in vivo, by impairing parasite development inside hepatocytes. This impairment has a clear impact on the ensuing blood stage parasitemia, reducing disease severity and enhancing host survival. Ivermectin has been proposed as a tool to control malaria transmission due to its effects on the mosquito vector...
November 28, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27891065/trends-causes-and-risk-factors-of-mortality-among-children-under-5-in-ethiopia-1990-2013-findings-from-the-global-burden-of-disease-study-2013
#14
Amare Deribew, Gizachew Assefa Tessema, Kebede Deribe, Yohannes Adama Melaku, Yihunie Lakew, Azmeraw T Amare, Semaw F Abera, Mesoud Mohammed, Abiy Hiruye, Efrem Teklay, Awoke Misganaw, Nicholas Kassebaum
BACKGROUND: Ethiopia has made remarkable progress in reducing child mortality over the last two decades. However, the under-5 mortality rate in Ethiopia is still higher than the under-5 mortality rates of several low- and middle-income countries (LMIC). On the other hand, the patterns and causes of child mortality have not been well investigated in Ethiopia. The objective of this study was to investigate the mortality trend, causes of death, and risk factors among children under 5 in Ethiopia during 1990-2013...
2016: Population Health Metrics
https://www.readbyqxmd.com/read/27890694/cord-blood-igg-and-the-risk-of-severe-plasmodium-falciparum-malaria-in-the-first-year-of-life
#15
Linda M Murungi, Klara Sondén, Dennis Odera, Loureen B Oduor, Fatuma Guleid, Irene N Nkumama, Mark Otiende, David T Kangoye, Greg Fegan, Anna Färnert, Kevin Marsh, Faith H A Osier
Young infants are less susceptible to severe episodes of malaria but the targets and mechanisms of protection are not clear. Cord blood antibodies may play an important role in mediating protection but many studies have examined their association with the outcome of infection or non-severe malaria. Here, we investigated whether cord blood IgG to Plasmodium falciparum merozoite antigens and antibody-mediated effector functions were associated with reduced odds of developing severe malaria at different time points during the first year of life...
November 24, 2016: International Journal for Parasitology
https://www.readbyqxmd.com/read/27887739/differences-in-the-modulation-of-reactive-species-lipid-bodies-cyclooxygenase-2-5-lipoxygenase-and-ppar-%C3%AE-in-cerebral-malaria-susceptible-and-resistant-mice
#16
Tatiana K S Borges, Érica A R Alves, Henda A R Vasconcelos, Fabiana P Carneiro, André M Nicola, Kelly G Magalhães, Maria Imaculada Muniz-Junqueira
Proinflammatory responses are associated with the severity of cerebral malaria. NO, H2O2, eicosanoid and PPAR-γ are involved in proinflammatory responses, but regulation of these factors is unclear in malaria. This work aimed to compare the expression of eicosanoid-forming-enzymes in cerebral malaria-susceptible CBA and C57BL/6 and -resistant BALB/c mice. Mice were infected with Plasmodium berghei ANKA, and the survival rates and parasitemia curves were assessed. On the sixth day post-infection, cyclooxygenase-2 and 5-lipoxygenase in brain sections were assessed by immunohistochemistry, and, NO, H2O2, lipid bodies, and PPAR-γ expression were assessed in peritoneal macrophages...
November 17, 2016: Immunobiology
https://www.readbyqxmd.com/read/27886547/comprehensive-review-on-various-strategies-for-antimalarial-drug-discovery
#17
Mitali Mishra, Vikash K Mishra, Varsha Kashaw, Arun K Iyer, Sushil Kumar Kashaw
The resistance of malaria parasites to existing drugs carries on growing and progressively limiting our ability to manage this severe disease and finally lead to a massive global health burden. Till now, malaria control has relied upon the traditional quinoline, antifolate and artemisinin compounds. Very few new antimalarials were developed in the past 50 years. Among recent approaches, identification of novel chemotherapeutic targets, exploration of natural products with medicinal significance, covalent bitherapy having a dual mode of action into a single hybrid molecule and malaria vaccine development are explored heavily...
November 12, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27884751/a-systematic-review-of-the-effect-of-cannabidiol-on-cognitive-function-relevance-to-schizophrenia
#18
REVIEW
Ashleigh L Osborne, Nadia Solowij, Katrina Weston-Green
BACKGROUND AND OBJECTIVES: Cognitive impairment is a core symptom domain of schizophrenia, neurological disorders and substance abuse. It is characterised by deficits in learning, memory, attention and executive functioning and can severely impact daily living. Antipsychotic drugs prescribed to treat schizophrenia provide limited cognitive benefits and novel therapeutic targets are required. Cannabidiol (CBD), a component of the cannabis plant, has anti-inflammatory and antipsychotic-like properties; however, its ability to improve cognitive impairment has not been thoroughly explored...
November 21, 2016: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/27884146/demographic-and-clinical-profiles-of-plasmodium-falciparum-and-plasmodium-vivax-patients-at-a-tertiary-care-centre-in-southwestern-india
#19
Laura Chery, Jennifer N Maki, Anjali Mascarenhas, Jayashri T Walke, Pooja Gawas, Anvily Almeida, Mezia Fernandes, Marina Vaz, Rakesh Ramanan, Diksha Shirodkar, Maria Bernabeu, Suresh Kumar Manoharan, Ligia Pereira, Rashmi Dash, Ambika Sharma, Riaz Basha Shaik, Rimi Chakrabarti, Prasad Babar, John White, Devaraja G Mudeppa, Shiva Kumar, Wenyun Zuo, Kristen M Skillman, Usheer Kanjee, Caeul Lim, Kathryn Shaw-Saliba, Ashwani Kumar, Neena Valecha, V N Jindal, Anar Khandeparkar, Pradeep Naik, Sunanda Amonkar, Manoj T Duraisingh, Shripad Tuljapurkar, Joseph D Smith, Nagesh Dubhashi, Roque G W Pinto, Maria Silveria, Edwin Gomes, Pradipsinh K Rathod
BACKGROUND: Malaria remains an important cause of morbidity and mortality in India. Though many comprehensive studies have been carried out in Africa and Southeast Asia to characterize and examine determinants of Plasmodium falciparum and Plasmodium vivax malaria pathogenesis, fewer have been conducted in India. METHODS: A prospective study of malaria-positive individuals was conducted at Goa Medical College and Hospital (GMC) from 2012 to 2015 to identify demographic, diagnostic and clinical indicators associated with P...
November 25, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27881136/community-health-workers-adherence-to-referral-guidelines-evidence-from-studies-introducing-rdts-in-two-malaria-transmission-settings-in-uganda
#20
Sham Lal, Richard Ndyomugenyi, Lucy Paintain, Neal D Alexander, Kristian S Hansen, Pascal Magnussen, Daniel Chandramohan, Siân E Clarke
BACKGROUND: Many malaria-endemic countries have implemented national community health worker (CHW) programmes to serve remote populations that have poor access to malaria diagnosis and treatment. Despite mounting evidence of CHWs' ability to adhere to malaria rapid diagnostic tests (RDTs) and treatment guidelines, there is limited evidence whether CHWs adhere to the referral guidelines and refer severely ill children for further management. In southwest Uganda, this study examined whether CHWs referred children according to training guidelines and described factors associated with adherence to the referral guideline...
November 24, 2016: Malaria Journal
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