Chloroquine resistance transporter

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  1. Chernogorski Moderator

    Chloroquine resistance transporter

    Rapid diagnostic assays for Pf CRT mutations are already employed as surveillance tools for drug resistance. Here, we review recent field studies that support the central role of Pf CRT mutations in chloroquine resistance.

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    Sep 25, 2009 Resistance is conferred by mutations in the Chloroquine Resistance Transporter PfCRT, an integral membrane protein localized to the parasite’s internal digestive vacuole. These mutations result in a marked reduction in the accumulation of chloroquine CQ by the parasite. However, the concentration of these reversal agents required to reverse chloroquine resistance is generally higher than that tolerated in vivo. The key molecular determinants of chloroquine resistance involve a number of mutations in the so-called “chloroquine resistance transporter” gene, or pfcrt. Jan 10, 2020 The P. falciparum chloroquine-resistance transporter PfCRT In 2000 a report by David Fidock and colleagues associated chloroquine resistance with mutations to the gene for a digestive vacuole transmembrane protein, pfcrt. PfCRT is a member of the drug/metabolite transporter superfamily.

    Recognition of the value of chloroquine was delayed, and it was not brought forward until it was reevaluated in the United States and designated the drug of choice against malaria near the end of World War II [3]. These studies suggest chloroquine resistance arose in ⩾4 distinct geographic foci and substantiate an important role of immunity in the outcomes of resistant infections after chloroquine treatment. Investigation of the resistance mechanisms and of the role of immunity in therapeutic outcomes will support new approaches to drugs that can take the place of chloroquine or augment its efficiency Early in the 20th century, intense demands for an effective quinine substitute launched the discovery and evaluation of a series of organic compounds (beginning with methylene blue), which led to pamaquine and quinacrine after World War I and ultimately produced chloroquine in 1934 [1, 2].

    Chloroquine resistance transporter

    Chloroquine Transport via the Malaria Parasite’s., Chloroquine - an overview ScienceDirect Topics

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  7. In P. falciparum the cause of the most lethal human malaria, chloroquine resistance is linked to multiple mutations in PfCRT, a protein that likely functions as a transporter in the parasite’s digestive vacuole membrane. Rapid diagnostic assays for PfCRT mutations are already employed as surveillance tools for drug resistance.

    • Chloroquine-Resistant Malaria The Journal of Infectious..
    • Malaria understanding drug resistance - BugBitten.
    • No Plasmodium falciparum Chloroquine Resistance..

    A T. gondii ortholog of the malarial chloroquine resistance transporter protein TgCRT was found to be localized to the VAC membrane. Although the mutated version of the malarial chloroquine resistance transporter PfCRT has been shown to confer resistance to chloroquine treatment, its physiologic function remains poorly understood. The malaria parasite's chloroquine resistance transporter CRT is an integral membrane protein localized to the parasite's acidic digestive vacuole. The function of CRT is not known and the protein was originally described as a transporter simply because it possesses 10 transmembrane domains. Mar 17, 2015 Chloroquine CQ is a widely used antimalarial agent, but the emergence and spread of CQ-resistant parasites is a growing global health problem. Although its physiological relevance remains unknown, P. falciparum CQ resistance transporter PfCRT confers CQ resistance through CQ egress from digestive vacuoles of P. falciparum. To address this issue, recombinant CQ-sensitive or CQ-resistant PfCRT proteins were purified and their transport activities were assessed.

  8. froidfeu XenForo Moderator

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  9. Sem-Z Well-Known Member

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  10. DebtCon Moderator

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    Malaria Prevention –
  11. Filenka User

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