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https://www.readbyqxmd.com/read/28724002/challenges-in-a-product-development-partnership-a-malaria-treatment-case-study
#1
Vera Lucia Luiza, Gabriela Costa Chaves, Tayná Marques Torres Barboza, Luciana de Paula Barros Gonçalves, Eric G Stobbaerts
This paper examines the development of a treatment - a fixed-dose combination of artesunate and mefloquine - in Brazil, from three points of view: in terms of access to medication; to record and report successes; and to look at the lessons learned. This product development took place in the ambit of a public-private partnership. Semi-structured interviews were held with key actors involved in the different phases of the development, and documents were analyzed. Two important points of reference orienting the design of the study and analysis were: a logical model for access to medication; and evaluation of programs...
July 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/28719304/misclassification-and-bias-in-military-studies-of-mefloquine
#2
Remington Lee Nevin
No abstract text is available yet for this article.
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28689867/ex-vivo-activity-of-proveblue-a-methylene-blue-against-field-isolates-of-plasmodium-falciparum-in-dakar-senegal-from-2013-2015
#3
Bécaye Fall, Marylin Madamet, Silman Diawara, Sébastien Briolant, Khalifa Ababacar Wade, Gora Lo, Aminata Nakoulima, Mansour Fall, Raymond Bercion, Mame Bou Kounta, Rémi Amalvict, Nicolas Benoit, Mamadou Wague Gueye, Bakary Diatta, Boubacar Wade, Bruno Pradines
Resistance to most antimalarial drugs has spread from Southeast Asia to Africa. Accordingly, new therapies to use with artemisinin-based combination therapy (triple ACT) are urgently needed. Proveblue, a methylene blue preparation, was found to exhibit antimalarial activity against Plasmodium falciparum strains in vitro. Proveblue has synergistic effects when used in combination with dihydroartemisinin, and has been shown to significantly reduce or prevent cerebral malaria in mice. The objectives of the current study were to evaluate the in vitro baseline susceptibility of clinical field isolates to Proveblue, compare its activity with that of other standard antimalarial drugs and define the patterns of cross-susceptibility between Proveblue and conventional antimalarial drugs...
July 6, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28650618/solution-and-solid-state-correlations-of-antimalarial-drug-actions-nmr-and-crystallographic-studies-of-drug-interactions-with-a-heme-model
#4
Erin L Dodd, Dagobert Tazoo, D Scott Bohle
Solution NMR has been used in tandem with a diamagnetic non-iron heme model compound as a simple and effective tool to rapidly probe the structures of the bound complexes formed between the metalloporphyrin and antimalarial drugs from the 4-aminoquinoline, 4-methylenehydroxylquinoline, and 8-aminoquinoline subfamilies. The ability of gallium(III) protoporphyrin IX to mimic heme chemistry is exploited. The 4-aminoquinolines quinacrine and amodiaquine and two novel 3-halo chloroquine analogues are found to bind to the metalloporphyrin through hydrogen-bonding and stacking interactions, while halofantrine and the 4-methylenehydroxylquinolines, quinine and mefloquine bind through the alcohol group of the drug...
July 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28646540/animal-embryotoxicity-studies-of-key-non-artemisinin-antimalarials-and-use-in-women-in-the-first-trimester
#5
REVIEW
Robert L Clark
The World Health Organization currently recommends quinine+clindamycin for use against malaria in the first trimester. This may soon change to recommending artemisinin-based combination therapies (standard duration of dosing = 3 days). The non-artemisinin partner drugs include amodiaquine, lumefantrine, mefloquine, piperaquine, sulfadoxine+pyrimethamine, and pyronaridine. For quinine, clindamycin, and mefloquine and the combinations of sulfadoxine+pyrimethamine and artemether+lumefantrine, there are reports (including studies without internal comparison groups) that combined describe 304 to >1100 exposures of women in the first trimester for each drug with no conclusive evidence of adverse effects on pregnancy at therapeutic doses...
June 24, 2017: Birth defects research
https://www.readbyqxmd.com/read/28630942/antimalarial-drugs-and-the-prevalence-of-mental-and-neurological-manifestations-a-systematic-review-and-meta-analysis
#6
Mary A Bitta, Symon M Kariuki, Clifford Mwita, Samson Gwer, Leah Mwai, Charles R J C Newton
Background: Antimalarial drugs affect the central nervous system, but it is difficult to differentiate the effect of these drugs from that of the malaria illness. We conducted a systematic review to determine the association between anti-malarial drugs and mental and neurological impairment in humans.  Methods: We systematically searched online databases, including Medline/PubMed, PsychoInfo, and Embase, for articles published up to 14th July 2016. Pooled prevalence, heterogeneity and factors associated with prevalence of mental and neurological manifestations were determined using meta-analytic techniques...
2017: Wellcome Open Research
https://www.readbyqxmd.com/read/28619415/international-travelers-sociodemographic-health-and-travel-characteristics-an-italian-study
#7
Gianmarco Troiano, Astrid Mercone, Alessandra Bagnoli, Nicola Nante
BACKGROUND: Approximately the 8% of travelers requires medical care, with the diagnosis of a vaccine-preventable disease. The aim of our study was to analyze the socio-demographic, health and travel characteristics of the Italian international travelers. METHODS: We conducted a cross sectional study from January 2015 to June 2016, at the Travel Medicine Clinic of Siena, asking the doctor to interview patients who attended the Clinic, recording socio-demographic and travel information, malaria prophylaxis, vaccinations...
March 2017: Annals of Global Health
https://www.readbyqxmd.com/read/28580606/combating-multi-drug-resistant-plasmodium-falciparum-malaria
#8
REVIEW
Aung Myint Thu, Aung Pyae Phyo, Jordi Landier, Daniel M Parker, François H Nosten
Over the past 50 years, P. falciparum has developed resistance against all antimalarial drugs used against it: chloroquine, sulphadoxine-pyrimethamine, quinine, piperaquine and mefloquine. More recently, resistance to the artemisinin derivatives and the resulting failure of artemisinin based combination therapy (ACT) are threatening all major gains made in malaria control. Each time resistance has developed over a progression, with delayed clearance of parasites emerging in a few regions, increasing in prevalence and geographic range, and then ultimately resulting in the complete failure of that antimalarial...
June 5, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28542123/malaria-surveillance-united-states-2014
#9
Kimberly E Mace, Paul M Arguin
PROBLEM/CONDITION: Malaria in humans is caused by intraerythrocytic protozoa of the genus Plasmodium. These parasites are transmitted by the bite of an infective female Anopheles mosquito. The majority of malaria infections in the United States occur among persons who have traveled to regions with ongoing malaria transmission. However, malaria is occasionally acquired by persons who have not traveled out of the country through exposure to infected blood products, congenital transmission, laboratory exposure, or local mosquitoborne transmission...
May 26, 2017: MMWR. Surveillance Summaries: Morbidity and Mortality Weekly Report. Surveillance Summaries
https://www.readbyqxmd.com/read/28526056/the-blood-schizonticidal-activity-of-tafenoquine-makes-an-essential-contribution-to-its-prophylactic-efficacy-in-nonimmune-subjects-at-the-intended-dose-200%C3%A2-mg
#10
REVIEW
Geoffrey Dow, Bryan Smith
Tafenoquine (TQ) is an 8-aminoquinoline anti-malarial being developed for malaria prophylaxis. It has been generally assumed that TQ, administered prophylactically, acts primarily on the developing exoerythrocytic stages of malaria parasites (causal prophylaxis), and that polymorphisms in metabolic enzymes thought to impact the activity of other 8-aminoquinolines also inhibit this property of TQ. Furthermore, it has been suggested that a diagnostic test for CYP2D6 metabolizer status might be required. In field studies in which metabolic status was not an exclusion criteria, TQ has been shown to exhibit similar prophylactic efficacy as blood schizonticidal drugs (mefloquine)...
May 19, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28511713/artemisinin-based-combination-therapy-in-pregnant-women-in-zambia-efficacy-safety-and-risk-of-recurrent-malaria
#11
Michael Nambozi, Jean-Bertin Bukasa Kabuya, Sebastian Hachizovu, David Mwakazanga, Joyce Mulenga, Webster Kasongo, Jozefien Buyze, Modest Mulenga, Jean-Pierre Van Geertruyden, Umberto D'Alessandro
BACKGROUND: In Zambia, malaria is one of the leading causes of morbidity and mortality, especially among under five children and pregnant women. For the latter, the World Health Organization recommends the use of artemisinin-based combination therapy (ACT) in the second and third trimester of pregnancy. In a context of limited information on ACT, the safety and efficacy of three combinations, namely artemether-lumefantrine (AL), mefloquine-artesunate (MQAS) and dihydroartemisinin-piperaquine (DHAPQ) were assessed in pregnant women with malaria...
May 16, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28506186/response-to-letter-to-the-editor-confounding-by-symptomatic-mefloquine-exposure-in-military-studies-of-post-traumatic-stress-disorder
#12
Carlos Osório, Norman Jones, Edgar Jones, Ian Robbins, Simon Wessely, Neil Greenberg
No abstract text is available yet for this article.
May 16, 2017: Behavioral Medicine
https://www.readbyqxmd.com/read/28506155/confounding-by-symptomatic-mefloquine-exposure-in-military-studies-of-post-traumatic-stress-disorder
#13
Remington Lee Nevin
No abstract text is available yet for this article.
May 16, 2017: Behavioral Medicine
https://www.readbyqxmd.com/read/28502942/brain-biopsy-is-more-reliable-than-the-dna-test-for-jc-virus-in-cerebrospinal-fluid-for-the-diagnosis-of-progressive-multifocal-leukoencephalopathy
#14
Junji Ikeda, Akira Matsushima, Wataru Ishii, Tetuya Goto, Kenta Takahashi, Kazuo Nakamichi, Masayuki Saijo, Yoshiki Sekijima, Shu-Ichi Ikeda
The current standard diagnostic approach for progressive multifocal leukoencephalopathy (PML) is to perform a DNA test to identify the presence of the JC virus in cerebrospinal fluid (CSF). A 32-year-old woman with a 5-year history of systemic lupus erythematosus developed right hemiplegia and motor aphasia. MRI revealed a large white matter lesion in the left frontal lobe. JC virus DNA was undetectable in the CSF, but a brain biopsy showed typical histopathology and a high DNA load of the JC virus. The patient was treated with mefloquine and mirtazapine, and is currently alive at 24 months after onset...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28499218/dissolution-and-physicochemical-stability-enhancement-of-artemisinin-and-mefloquine-co-formulation-via-nano-confinement-with-mesoporous-sba-15
#15
Kumaran Letchmanan, Shou-Cang Shen, Wai Kiong Ng, Reginald B H Tan
The objective of this study is to enhance the dissolution rate, supersaturation and physicochemical stability of combination of two poorly water-soluble anti-malarial drugs, artemisinin (ART) and mefloquine (MFQ), by encapsulating them inside mesoporous silica (SBA-15) via co-spray drying. Characteristic studies such as powder X-ray diffraction (PXRD), transmission electron microscopy (TEM) and scanning electron microscope (SEM) clearly indicate the amorphization of the crystalline drugs. ART/MQF/SBA-15 formulations show a superior dissolution enhancement with a burst release of more than 95% of drugs within 30min...
May 2, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28499010/acute-eosinophilic-pneumonia-following-artenimol-piperaquine-exposure
#16
Lisa Fourmont, Matthieu Revest, Elisabeth Polard, Mathieu Lederlin, Philippe Delaval, Benoit Desrues, Pierre Tattevin, Stéphane Jouneau
Acute eosinophilic pneumonia (AEP) has been reported following chloroquine or mefloquine exposure, both structurally related to piperaquine. We report a case of AEP with typical CT scan patterns, hypereosinophilia in blood (9.8 109/l), and bronchoalveolar lavage (78% of 600 000 cells/ml), 10 days after artenimol-piperaquine exposure in a 26-year-old man.
September 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28495354/tafenoquine-for-malaria-prophylaxis-in-adults-an-integrated-safety-analysis
#17
Anne Novitt-Moreno, Janet Ransom, Geoffrey Dow, Bryan Smith, Lisa Thomas Read, Stephen Toovey
BACKGROUND: Tafenoquine is a new prophylactic antimalarial drug. The current analysis presents an integrated safety assessment of the Tafenoquine Anticipated Clinical Regimen (Tafenoquine ACR) from 5 clinical trials, including 1 conducted in deployed military personnel and 4 in non-deployed residents, which also incorporated placebo and mefloquine comparator groups. METHODS: Adverse events (AEs) were coded according to the Medical Dictionary for Regulatory Activities (MedDRA(®), Version 15...
May 8, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/28487213/long-term-health-outcomes-among-returned-peace-corps-volunteers-after-malaria-prophylaxis-1995-2014
#18
Kathrine R Tan, Susan J Henderson, John Williamson, Rennie W Ferguson, Thomas M Wilkinson, Paul Jung, Paul M Arguin
BACKGROUND: A primary reason for non-adherence to malaria chemoprophylaxis is fear of latent side effects. We examined latent effects of malaria chemoprophylaxis among Returned Peace Corps Volunteers (RPCVs). METHODS: During July 18-September 16, 2016, RPCVs who served during 1995-2014 with an e-mail address in Peace Corps' RPCV database were invited to take an internet-based survey on malaria prophylaxis and medical diagnoses. "Good adherence" meant taking prophylaxis "as prescribed" or "most of the time...
May 6, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/28475285/evidence-of-involvement-of-neurone-glia-neurone-neurone-communications-via-gap-junctions-in-synchronised-activity-of-kndy-neurones
#19
K Ikegami, S Minabe, N Ieda, T Goto, A Sugimoto, S Nakamura, N Inoue, S Oishi, A D Maturana, M Sanbo, M Hirabayashi, K-I Maeda, H Tsukamura, Y Uenoyama
Pulsatile secretion of gonadotrophin-releasing hormone (GnRH)/luteinising hormone is indispensable for the onset of puberty and reproductive activities at adulthood in mammalian species. A cohort of neurones expressing three neuropeptides, namely kisspeptin, encoded by the Kiss1 gene, neurokinin B (NKB) and dynorphin A, localised in the hypothalamic arcuate nucleus (ARC), so-called KNDy neurones, comprises a putative intrinsic source of the GnRH pulse generator. Synchronous activity among KNDy neurones is considered to be required for pulsatile GnRH secretion...
June 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28464765/functional-chemical-groups-that-may-likely-become-source-for-synthesis-of-novel-central-nervous-system-cns-acting-drugs
#20
Saganuwan Alhaji Saganuwan
Central nervous system (CNS) disorders are on increase perhaps due to genetic, enviromental, social and dietetic factors. Unfortunately, a large number of CNS drugs have adverse effects such as addiction, tolerance, psychological and physical dependence. In view of this, literature search was carried out with a view to identifying functional chemical groups that may serve as lead molecule for synthesis of compounds that may have CNS activity. The search revealed that heterocycles that have heteroatoms such as nitrogen (N), sulphur (S) and oxygen (O) form the largest class of organic compounds...
May 2, 2017: Central Nervous System Agents in Medicinal Chemistry
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