نتایج جستجو برای: ama1 gene
تعداد نتایج: 1141590 فیلتر نتایج به سال:
Abstract Background Malaria eradication requires a combined effort involving all available control tools, and these efforts would be complemented by an effective vaccine. The antigen targets of immune responses may show polymorphisms that can undermine their recognition effectors hence render vaccines based on antigens from single parasite variant ineffective against other variants. This study ...
یک فرآیند مهم در چرخه زندگی پلاسمودیوم فالسیپاروم تهاجم به گلبولهای قرمز انسان است. ورود به سلولهای میزبان نیازمند آنتی ژن ama1 می باشد. بدلیل اینکه در یوکاریتوها آنتی بادیهایی که بر علیه این آنتی ژن ایجاد می شود می تواند مانع تهاجم شود بنابراین ama1 یکی از اهداف اولیه در تولید واکسن به شمار می رود. گفته می شود گلیکوزیلاسیون پروتئینهای سطحی در بسیاری از اعمال سلولی نظیر شناسایی سلولها سیگنالینگ...
Plasmodium falciparum apical membrane antigen 1 (PfAMA1) is a leading blood stage vaccine candidate. Plasmodium knowlesi AMA1 (PkAMA1) was produced and purified using similar methodology as for clinical grade PfAMA1 yielding a pure, conformational intact protein. Combined with the adjuvant CoVaccine HT™, PkAMA1 was found to be highly immunogenic in rabbits and the efficacy of the PkAMA1 was sub...
Malaria can present itself as an uncomplicated or severe disease. We have here studied the quantity and quality of antibody responses against merozoite antigens, as well as multiplicity of infection (MOI), in children from Uganda. We found higher levels of IgG antibodies toward erythrocyte-binding antigen EBA181, MSP2 of Plasmodium falciparum 3D7 and FC27 (MSP2-3D7/FC27), and apical membrane an...
We have previously shown that a DNA-prime followed by an adenovirus-5 boost vaccine containing CSP and AMA1 (DNA/Ad) successfully protected 4 of 15 subjects to controlled human malaria infection (CHMI). However, the adenovirus-5 vaccine alone (AdCA) failed to induce protection despite eliciting cellular responses that were often higher than those induced by DNA/Ad. Here we determined the effect...
BACKGROUND The objective was to evaluate the safety and immunogenicity of the AMA1-based malaria vaccine FMP2.1/AS02(A) in children exposed to seasonal falciparum malaria. METHODOLOGY/PRINCIPAL FINDINGS A Phase 1 double blind randomized controlled dose escalation trial was conducted in Bandiagara, Mali, West Africa, a rural town with intense seasonal transmission of Plasmodium falciparum mala...
BACKGROUND Heterogeneity in malaria exposure complicates survival analyses of vaccine efficacy trials and confounds the association between immune correlates of protection and malaria infection in longitudinal studies. Analysis may be facilitated by taking into account the variability in individual exposure levels, but it is unclear how exposure can be estimated at an individual level. METHOD...
Host cell invasion by Apicomplexan parasites marks a crucial step in disease establishment and pathogenesis. The moving junction (MJ) is a conserved and essential feature among parasites of this phylum during host cell invasion, thus proteins that associate at this MJ are potential targets of drug and vaccine development. In both Toxoplasma gondii and Plasmodium falciparum, a micronemal protein...
Invasion of host cells by the malaria pathogen Plasmodium relies on parasite transmembrane adhesins that engage host-cell receptors. Adhesins must be released by cleavage before the parasite can enter the cell, but the processing enzymes have remained elusive. Recent work indicates that the Toxoplasma rhomboid intramembrane protease TgROM5 catalyzes this essential cleavage. However, Plasmodium ...
Overcoming antigenic variation is one of the major challenges in the development of an effective vaccine against Plasmodium falciparum, a causative agent of human malaria. Inclusion of multiple Ag variants in subunit vaccine candidates is one strategy that has aimed to overcome this problem for the leading blood-stage malaria vaccine targets, that is, merozoite surface protein 1 (MSP1) and apic...
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