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Therapeutic efficacy and effects of artemisinin-based combination treatments on uncomplicated Plasmodium falciparum malaria-associated anaemia in Nigerian children during seven years of adoption as first-line treatments

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Infectious Diseases of Poverty 2017年第1期6卷 315-334页

作者： Akintunde Sowunmi Kazeem Akano Godwin Ntadom Adejumoke I.Ayede Folasade O.Ibironke Temitope Aderoyeje Elsie O.Adewoye Bayo Fatunmbi stephen oguche Henrietta U.Okafor Ismaila Watila Martin Meremikwu Philip Agomo William Ogala Chimere Agomo Onikepe A.Folarin Grace O.Gbotosho Christian T.Happi Department of Pharmacology and Therapeutics University of IbadanIbadanNigeria Institute for Medical Research and Training College of MedicineUniversity of IbadanIbadanNigeria National Malaria Elimination Programme Federal Ministry of HealthAbujaNigeria Department of Paediatrics University of IbadanIbadanNigeria Department of Clinical Pharmacology University College HospitalIbadanNigeria Department of Physiology University of IbadanIbadanNigeria World Health Organization Regional Office for the Western PacificKhan Daun PenhPhnom PenhCambodia Department of Paediatrics University of JosJosNigeria Department of Paediatrics Institute of Child HealthUniversity of Nigeria Teaching HospitalEnuguNigeria Department of Paediatrics Specialist HospitalMaiduguriBorno SateNigeria Department of Paediatrics University of CalabarCalabarCross Rivers StateNigeria Nigeria Institute of Medical Research YabaLagosNigeria Department of Paediatrics Ahmadu Bello UniversityZariaNigeria Department of Biological Sciences Redeemer’s UniversityEdeOsun StateNigeria

Background:Artemisinin-based combination treatments(ACTs)are the first-line treatments of uncomplicated Plasmodium falciparum malaria in many endemic areas but there are few evaluation of their efficacy in anaemic malarious ***:Therapeutic efficacy of 3-day regimens of artesunate-amodiaquine and artemether-lumefantrine was evaluated in 437 anaemic and 909 non-anaemic malarious children following treatment during a seven-year period(2008-2014).Patterns of temporal changes in haematocrit were classified based on haematocrit values<30%and≥30%.Kinetics of the disposition of the deficit in haematocrit from 30%following treatment were evaluated using a non-compartment ***:PCR-corrected parasitological efficacy 28 days after start of treatment was significantly higher in artesunateamodiaquine-compared to artemether-lumefantrine-treated children[97%(95%CI:92.8-100)versus 96.4%(95%CI:91.3-99.4),P=0.02],but it was similar in non-anaemic and anaemic *** in haematocrit/1000 asexual parasites cleared from peripheral blood was significantly greater at lower compared to higher parasitaemias(P<0.0001),and in non-anaemic compared to anaemic children(P=0.007).In anaemic children at presentation,mean anaemia recovery time(AnRT)was 15.4 days(95%CI:13.3-17.4)and it did not change over the *** in haematocrit deficits from 30%were monoexponential with mean estimated half-time of 1.4 days(95%CI:1.2-1.6).Anaemia half-time(t_(1/2anaemia))correlated positively with AnRT in the same patients(r=0.69,P<0.0001).Bland-Altman analysis of 10 multiples of t_(1/2anaemia) and AnRT showed narrow limit of agreement with insignificant bias(P=0.07)suggesting both can be used interchangeably in the same ***:Artesunate-amodiaquine and artemether-lumefantrine remain efficacious treatments of uncomplicated *** infections in non-anaemic and anaemic Nigerian children in the last 7 years of adoption as first-line *** ACTs may also

关键词： Malaria-associated anaemia “Haematocrit conservation” Artemisinin-based combination treatments Children Nigeria

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Parasite reduction ratio one day after initiation of artemisinin-based combination therapies and its relationship with parasite clearance time in acutely malarious children

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Infectious Diseases of Poverty 2018年第1期7卷 1270-1283页

作者： Kazeem Akano Godwin Ntadom Chimere Agomo Christian T.Happi Onikepe A.Folarin Grace O.Gbotosho Olugbenga Mokuolu Finomo Finomo Joy C.Ebenebe Nma Jiya Jose Ambe Robinson Wammanda George Emechebe Oluwabunmi K.Basorun Olubunmi A.Wewe Sikiru Amoo Nnenna Ezeigwe stephen oguche Bayo Fatunmbi Akintunde Sowunmi Department of Pharmacology and Therapeutics University of IbadanIbadanNigeria Antimalarial Therapeutic Efficacy Monitoring Group National Malaria Elimination ProgrammeThe Federal Ministry of HealthAbujaNigeria Department of Medical Laboratory Science University of LagosLagosNigeria Department of Biological Sciences and African Centre of Excellence for Genomics of Infectious Diseases(ACEGID) Redeemer UniversityEdeNigeria Institute for Medical Research and Training University of IbadanIbadanNigeria Department of Pharmacology and Toxicology Faculty of PharmacyUniversity of IbadanIbadanNigeria Department of Paediatrics University of IlorinIlorinNigeria Department of Paediatrics Federal Medical CentreYenagoaNigeria Department of Paediatrics Nnamdi Azikiwe UniversityAwkaNigeria Department of Paediatrics Uthman Dan Fodio UniversitySokotoNigeria Department of Paediatrics University of MaiduguriMaiduguriNigeria Department of Paediatrics Ahmadu Bello UniversityZariaNigeria Department of Paediatrics Imo State University Teaching HospitalOrluNigeria Department of Paediatrics University of JosJosNigeria World Health Organization Country OfficeKampalaUganda

Background:In acute falciparum malaria,asexual parasite reduction ratio two days post-treatment initiation(PRRD2)≥10000 per cycle has been used as a measure of the rapid clearance of parasitaemia and efficacy of artemisinin ***,there is little evaluation of alternative measures;for example,parasite reduction ratio one day after treatment initiation(PRRD1)and its relationship with parasite clearance time(PCT)or *** study evaluated the use of PRRD1 as a measure of responsiveness to antimalarial ***:In acutely malarious children treated with artesunate-amodiaquine(AA),artemether-lumefantrine(AL)or dihydroartemisinin-piperaquine(DHP),the relationships between PRRD1 or PRRD2 and PCT,and between PRRD1 and PRRD2 were evaluated using linear *** between estimates of PCT using PRRD1 and PRRD2 linear regression equations was evaluated using the Bland-Altman *** of PRRD1>5000 per half cycle and PRRD2≥10000 per cycle were evaluated using stepwise multiple logistic regression *** the linear regression equation of the relationship between PRRD1 and PCT previously generated in half of the DHP-treated children during the early study phase,PCT estimates were compared in a prospective blinded manner with PCTs determined by microscopy during the later study phase in the remaining ***:In 919 malarious children,PRRD1 was significantly higher in DHP-and AA-treated compared with AL-treated children(P15months,parasitaemia>10000/μl and DHP treatment independently predicted PRRD1>5000 per half cycle,while age>30months,haematocrit≥31%,body temperature>37.4°C,parasi

关键词： Falciparum malaria Artemisinin-based combination therapies Parasite clearance Children Nigeria

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Prevalence, Clinical Features and Outcome of Neonatal Malaria in Two Major Hospitals in Jos, North-Central Nigeria

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Advances in Infectious Diseases 2017年第3期7卷 55-69页

作者： Udochukwu M. Diala Kenneth I. Onyedibe Akinyemi O. D. Ofakunrin Olubunmi O. Diala Bose Toma Daniel Egah stephen oguche Department of Paediatrics University of Jos Jos Plateau State Nigeria Department of Medical Microbiology University of Jos Plateau State Nigeria Department of Family Medicine Jos University Teaching Hospital Jos Plateau State Nigeria

Malaria was thought to be rare in neonates. However, recent studies report increasing prevalence in neonates. Clinical features of neonatal malaria have also not been adequately reported. This study was undertaken to assess the prevalence, clinical features and outcome of malaria in neonates admitted into two tertiary hospitals in Jos, Plateau State. All consecutive neonates aged 0 - 28 days admitted into the neonatal units of Jos University Teaching Hospital and Bingham University Teaching Hospital, Jos were recruited into the study. Giemsa stained blood films of the neonates were examined by trained microscopists. Neonates with malaria had presenting clinical features recorded and treated with amodiaquine (1st line) and quinine (2nd line). Clinical features and parasitaemia were monitored for 14 days for outcome. Of the 301 neonates enrolled, 16 had malaria parasitaemia giving a prevalence of 5.3%. Congenital malaria accounted for 87.5% of cases of neonatal malaria. Plasmodium falciparum mono-infection was responsible for all the cases of malaria. ITN use in pregnancy offered some protection against neonatal malaria (CI=0.2 - 0.7). The median parasite density was 255 (72, 385) parasites/μl. Fever was significantly present in 10 (66.7%) of the cases (p=0.03). Fifteen of the 16 neonates had clinical and parasitological cure on treatment with amodiaquine. One treatment failure had cure after retreatment with quinine. There was no mortality in all 16 neonates treated for malaria. Malaria is not rare in neonates on admission in Jos. Fever is the commonest clinical feature of neonatal malaria. Amodiaquine provided effective treatment of malaria in neonates in Jos.

关键词： Neonatal Malaria Prevalence Amodiaquine Bed Nets

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Neuropeptide cholecystokinin:a key neuromodulator for hippocampal functions

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Neural Regeneration Research 2025年第7期20卷 1991-1992页

作者： Fengwen Huang stephen Temitayo Bello Department of Neuroscience City University of Hong KongKowloon TongHong Kong Special Administrative RegionChina Center for Regenerative Medicine and Health Hong Kong Institute of Science&InnovationChinese Academy of SciencesHong Kong Special Administrative RegionChina

Spatial memory is crucial for survival within external surroundings and wild *** hippocampus,a critical hub for spatial learning and memory formation,has received extensive investigations on how neuromodulators shape its functions(Teixeira et al.,2018;Zhang et al.,2024).However,the landscape of neuromodulations in the hippocampal system remains poorly understood because most studies focus on classical monoamine neuromodulators,such as acetylcholine,serotonin,dopamine,and *** neuropeptides,comprising the most abundant neuromodulators in the central nervous system,play a pivotal role in neural information processing in the hippocampal ***(CCK),one of the most abundant neuropeptides,has been implicated in regulating various physiological and neurobiological statuses(Chen et al.,2019).CCK-A receptor(CCK-AR)and CCK-B receptors(CCK-BR)are two key receptors mediating the biological functions of CCK,both of which belong to class-A sevenfold transmembrane G protein-coupled receptors(Nishimura et al.,2015).CCK-AR preferentially reacts to sulfated CCK,whereas CCK-BR binds both CCK and gastrin with similar affinities(Ding et al.,2022).The expression patterns of CCK-AR and CCK-BR are distinct,implying that CCK has various functions in target *** instance,CCK-AR is widely expressed in the GI and brain subregions and is hence implicated in the control of digestive function and satiety ***,CCK-BR is abundantly and widely distributed in the central nervous system,which majorly regulates anxiety,learning,and memory(Ding et al.,2022).However,the roles of endogenous CCK and CCK receptors in regulating hippocampal function at electrophysiological and behavioral levels have received less attention.

关键词： abundant functions modulator

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Declining responsiveness of childhood Plasmodium falciparum infections to artemisinin-based combination treatments ten years following deployment as first-line antimalarials in Nigeria

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Infectious Diseases of Poverty 2019年第4期8卷 96-97页

作者： Akintunde Sowunmi Godwin Ntadom Kazeem Akano Folasade O.Ibironke Adejumoke I.Ayede Chimere Agomo Onikepe A.Folarin Grace O.Gbotosho Christian Happi stephen oguche Henrietta U.Okafor Martin Meremikwu Philip Agomo William Ogala Ismaila Watila Olugbenga Mokuolu Finomo Finomo Joy C.Ebenebe Nma Jiya Jose Ambe Robinson Wammanda George Emechebe Wellington Oyibo Francis Useh Temitope Aderoyeje Titilope M.Dokunmu Omobolaji T.Alebiosu Sikiru Amoo Oluwabunmi K.Basorun Olubunmi A.Wewe Chukwuebuka Okafor Odafe Akpoborie Bayo Fatunmbi Elsie O.Adewoye Nnenna M.Ezeigwe Ayoade Oduola Antimalarial Therapeutic Efficacy Monitoring Group National Malaria Elimination ProgrammeThe Federal Ministry of HealthAbujaNigeria Department of Pharmacology and Therapeutics University of IbadanIbadanNigeria 不详

Background:The development and spread of artemisinin-resistant Plasmodium falciparum malaria in Greater Mekong Subregion has created impetus for continuing global monitoring of efficacy of artemisinin-based combination therapies(ACTs). This post analyses is aimed to evaluate changes in early treatment response markers 10 years after the adoption of ACTs as first-line treatments of uncomplicated falciparum malaria in ***: At 14 sentinel sites in six geographical areas of Nigeria, we evaluated treatment responses in 1341 children under 5 years and in additional 360 children under 16 years with uncomplicated malaria enrolled in randomized trials of artemether-lumefantrine versus artesunate-amodiaquine at 5-year interval in 2009-2010 and 2014-2015 and at 2-year interval in 2009-2010 and 2012-2015, respectively after deployment in ***: Asexual parasite positivity 1 day after treatment initiation (APPD1) rose from 54 to 62% and 2 days after treatment initiation from 5 to 26% in 2009-2010 to 2014-2015(P=0.002 and P 75 000 μl^-1, haematocrit > 27% 1 day post-treatment initiatiortreatment with artemether-lumefantrine and enrolment in 2014-2015 independently predicted APPD1. In paralle , Kaplan-Meier estimated risk of recurrent infections by day 28 rose from 8 to 14% (P=0005) and from 9 to 15%(P=0.02) with artemether-lumefantrine and artesunate-amodiaquine, respectively. Mean asexual parasitaemia half-life increased significantly from 1.1 h to 1.3h within 2 years (P<0.0001).Conclusions:These data indicate declining parasitological responses through time to the two ACTs may be due to emergence of parasites with r

关键词： Declining responsiveness Falciparum malaria Children Artemisinin-based combination treatment Nigeria

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Human induced pluripotent stem cell-derived therapies for regeneration after central nervous system injury

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Neural Regeneration Research 2025年第11期20卷 3063-3075页

作者： stephen Vidman Yee Hang Ethan Ma Nolan Fullenkamp Giles W.Plant Department of Neuroscience Ohio State UniversityColumbusOHUSA

In recent years,the progression of stem cell therapies has shown great promise in advancing the nascent field of regenerative *** the non-regenerative nature of the mature central nervous system,the concept that“blank”cells could be reprogrammed and functionally integrated into host neural networks remained *** work has also demonstrated the ability of such cells to stimulate intrinsic growth programs in post-mitotic cells,such as *** embryonic stem cells demonstrated great potential in treating central nervous system pathologies,ethical and technical concerns *** barriers,along with the clear necessity for this type of treatment,ultimately prompted the advent of induced pluripotent stem *** advantage of pluripotent cells in central nervous system regeneration is multifaceted,permitting differentiation into neural stem cells,neural progenitor cells,glia,and various neuronal *** precise spatiotemporal application of extrinsic growth factors in vitro,in addition to microenvironmental signaling in vivo,influences the efficiency of this directed *** the pluri-or multipotency of these cells is appealing,it also poses the risk of unregulated differentiation and teratoma *** of the neuroectodermal lineage,such as neuronal subpopulations and glia,have been explored with varying degrees of *** the risk of cancer or teratoma formation is greatly reduced,each subpopulation varies in effectiveness and is influenced by a myriad of factors,such as the timing of the transplant,pathology type,and the ratio of accompanying progenitor ***,successful transplantation requires innovative approaches to develop delivery vectors that can mitigate cell death and support ***,host immune responses to allogeneic grafts must be thoroughly characterized and further developed to reduce the need for *** to a clinical setting wi

关键词： axon regeneration central nervous system regeneration induced pluripotent stem cells neurotrauma regenerative medicine spinal cord injury stem cell therapy

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Autosub6000:A Deep Diving Long Range AUV

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Journal of Bionic Engineering 2009年第1期6卷 55-62页

作者： stephen McPhail Underwater Systems Laboratory National Marine Facilities DivisionNational Oceanography CentreSouthampton SO14 3ZHUK

With an ultimate range up to 1000 km,a maximum operating depth of 6000 m,and a generous payload capacity,Autosub6000 is well placed to become one of the world's most capable deep diving Autonomous Underwater Vehicles(AUVs). Recently,Autosub6000 successfully completed its first deep water engineering trials,and in September 2008,fitted with a multibeam sonar,will carry out its first science *** paper will describe how we are tackling the design issues that specifically affect a deep diving AUV which must be capable of operating with true autonomy,independently of the mother ship, namely:carrying adequate energy for long endurance and range,coping with varying buoyancy,and maintaining accurate navigation throughout missions lasting up to several *** from the recent engineering trails are presented,and future missions and development plans are discussed.

关键词： AUV robotics navigation lithium polymer battery deep ocean research

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Palaeogeographic variation in the Permian-Triassic boundary microbialites:A discussion of microbial and ocean process esafter the end-Permian mass extinction

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Journal of Palaeogeography 2017年第2期6卷 97-107页

作者： stephen Kershaw Department of Life Sciences Brunel University Kingston Lane Uxbridge UB8 3PH UK

Shallow marine carbonate sediments that formed after the end-Permian mass extinction are rich in a thin(maximum ca.15 m) deposit of *** communities that constructed the microbialites have geographic variability of composition,broadly divisible into two groups:1) eastern Tethys sites are calcimicrobe-dominated(appearing as thrombolites in the field),with rare occurrence of sedimentconstructed microbialites and uncommon cements either within microbial structure or as inorganic precipitates,2) other Tethys sites are sediment-dominated structures forming stromatolites and thrombolites,composed of micrites and cements,with some inorganic *** other Tethys locations include western and central Tethys sites but their palaeogeographic positions depend on the accuracy of continental reconstructions,of which there are several *** contrast to geographic variation of microbialites,the conodont Hindeodus parvus,which appeared after the extinction and defines the base of the Triassic,is widespread,indicating easy lateral migration throughout *** animals were active nekton,although being small animals were presumably at least partly carried by water currents,implying active Tethyan surface water circulation after the extinction ***-extinction ammonoid taxa,presumed active swimmers,show poor evidence of a wide distribution in the Griesbachian beds immediately after the extinction,but are more cosmopolitan higher up,in the Dienerian strata in *** shelly fossils also have poorly defined distributions after the extinction,but ostracods show some wider distribution suggesting migration was possible after the *** there is a contrast between the geographic differences of microbialites and some shelly *** the cause of geographic variation of post-extinction microbialites is problematic and may include one or more of the following possibilities:1) because calcifying microbial organisms th

关键词： Stromatolite Thrombolite Microbialite Permian-Triassic boundary Conodonts Tethys Mass extinction

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Combining Aluminum Heat Treat with Hot Isostatic Pressing: A Comparison of Structure, Properties, and Processing Routes for a Cast AI-Si-Mg Alloy

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材料热处理学报 2004年第5期25卷 546-551页

作者： stephen J. Mashl Body cote HIP Inc. Andover Massachusetts USA

Bodycote researchers have successfully demonstrated that a T6 heat treatment can be integrated with Densal?, a proprietary, aluminum specific, hot isostatic pressing (HIP) process. In this combined operation, at least a portion of the solution heat treatment is conducted at elevated pressure. During development, two issues, adiabatic cooling during depressurization and a possible variation in the kinetics of homogenization resulting from conducting the solution heat treat at elevated pressure were perceived as factors which could alter the heat treat response from that seen in conventional processing. This paper reviews the results of experiments performed to Al-Si-Mg (A356.0) castings subjected to both combined and conventional processing routes. Results indicate that the combined HIP and heat treat process is an efficient means of achieving a microstructure characteristic of a conventionally T6 processed material while eliminating porosity within the casting. Further, the fatigue life of an A356.0 casting processed using the combined cycle can be improved by more than an order of magnitude over the as-cast and T6 treated component.

关键词： Al-Si-Mg合金热处理热等静压缩 HIP 机械性质疲劳寿命

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RADIATION BOUNDARY CONDITIONS FOR MAXWELL'S EQUATIONS:A REVIEW OF ACCURATE TIME-DOMAIN FORMULATIONS

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Journal of Computational Mathematics 2007年第3期25卷 305-336页

作者： Thomas Hagstrom stephen Lau Department of Mathematics and Statistics University of New MexicoAlbuquerqueNM 87131USA Division of Applied Mathematics Brown University182 George StreetProvidenceRI 02912USA

We review time-domain formulations of radiation boundary conditions for Maxwell＇s equations, focusing on methods which can deliver arbitrary accuracy at acceptable compu-tational cost. Examples include fast evaluations of nonlocal conditions on symmetric and general boundaries, methods based on identifying and evaluating equivalent sources, and local approximations such as the perfectly matched layer and sequences of local boundary conditions. Complexity estimates are derived to assess work and storage requirements as a function of wavelength and simulation time.

关键词： Maxwell's equations Radiation boundary conditions Fast algorithms Kirchoffformulas Perfectly matched layers.

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