Pfcrt chloroquine resistance

Discussion in 'Hydroxychloroquine Sulfate' started by valeon, 26-Feb-2020.

  1. Pirate_Spirit Well-Known Member

    Pfcrt chloroquine resistance


    Chloroquine has been extensively used in mass drug administrations, which may have contributed to the emergence and spread of resistance. It is recommended to check if chloroquine is still effective in the region prior to using it.

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    Mutations in the Plasmodium falciparum chloroquine resistance transporter, PfCRT, are the major determinant of chloroquine resistance in this lethal human malaria parasite. Here, we describe P. Plasmodium falciparum resistance to chloroquine, the former gold standard antimalarial drug, is mediated primarily by mutant forms of the ‘Chloroquine Resistance Transporter’ PfCRT. These mutations impart upon PfCRT the ability to efflux chloroquine from the intracellular digestive vacuole, the site of drug action. Chloroquine resistance CQR in Plasmodium falciparum is associated with mutations in the digestive vacuole transmembrane protein PfCRT. However, the contribution of individual pfcrt mutations has not been clarified and other genes have been postulated to play a substantial role. Using allelic exchange, we show that removal of the single PfCRT amino‐acid change K76T from resistant strains.

    The Centers for Disease Control and Prevention recommend against treatment of malaria with chloroquine alone due to more effective combinations. In areas where resistance is present, other antimalarials, such as mefloquine or atovaquone, may be used instead.

    Pfcrt chloroquine resistance

    PfCRT and its role in antimalarial drug resistance., PfCRT and its role in antimalarial drug resistance

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  5. Plasmodium falciparum chloroquine resistance CQR transporter point mutation PfCRT 76T is known to be the key determinant of CQR. Molecular detection of PfCRT 76T in field samples may be used for the surveillance of CQR in malaria-endemic countries.

    • Molecular map of chloroquine resistance in Mali..
    • A critical role for PfCRT K76T in Plasmodium falciparum..
    • Epidemiology of malaria and chloroquine resistance in..

    It has been shown that chloroquine resistant strains can efflux chloroquine from the digestive vacuole upto 40 times faster compared to chloroquine sensitive strains 18. The increased rate of chloroquine exiting the DV has beed associated to a mutation in plasmodium falciparum chloroquine resistant promoter PfCRT gene. PfCRT gene is found. Feb 11, 2020 And that’s what is so exciting about the image above. It presents the unprecedented, 3D atomic-resolution structure of a protein made by P. falciparum that’s been a major source of its resistance the chloroquine-resistance transporter protein, or PfCRT. In this cropped density map, you see part of the protein’s biochemical structure. Resistance to chloroquine of malaria strains is known to be associated with a parasite protein named PfCRT, the mutated form of which is able to reduce chloroquine accumulation in the digestive vacuole of the pathogen. Whether the protein mediates extrusion of the drug acting as a channel or as a carrier and which is the protonation state of its chloroquine substrate is the subject of a.

     
  6. Geld Well-Known Member

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  8. encomstr Guest

    Hydroxychloroquine Oral Route Description and Brand Names - Mayo Clinic Hydroxychloroquine is used to treat malaria. It is also used to prevent malaria infection in areas or regions where it is known that other medicines eg, chloroquine may not work. Hydroxychloroquine belongs to a group of medicines known as antimalarials.

    Hydroxychloroquine Uses, Dosage & Side Effects -