Chloroquine cytotoxic hemozoin falicparum

Discussion in 'Trusted Online Pharmacy' started by dr_pasha, 12-Mar-2020.

  1. netperson Moderator

    Chloroquine cytotoxic hemozoin falicparum


    Previously referred to as “Resochin”, Chloroquine was first discovered in 1924 at Bayer laboratories. Its first use was initially ignored as it was found to be toxic to people.

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    Chloroquine forms a drug-hemozoin complex, and this complex caps the polymerizing chain, thereby preventing additional polymerization. Along with the prevention of polymerization, the free heme accumulates in the food vacuole, exerting its toxic effects on the parasite. Chloroquine also functions as an anti-autoimmune therapy. In malaria parasites, hemozoin is often called malaria pigment. Since the formation of hemozoin is essential to the survival of these parasites, it is an attractive target for developing drugs and is much-studied in Plasmodium as a way to find drugs to treat malaria malaria's Achilles' heel. The mutants produce little or no hemozoin Hz, the detoxification by-product of Hb degradation. Further, they are resistant to chloroquine, an antimalarial drug that interferes with Hz formation, but their sensitivity to artesunate, also thought to be dependent on Hb degradation, is retained.

    These trials showed that chloroquine eliminated malaria and was appropriate to be used as an antimalarial drug. Thus, it was not until World War II that the government of the United States sponsored the clinical trials of chloroquine as an antimalarial drug.

    Chloroquine cytotoxic hemozoin falicparum

    Replication of Plasmodium in reticulocytes can occur., Hemozoin - Wikipedia

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  7. Questration into inert, nontoxic crystalline hemozoin Hz 9– 12. The Hz crystallization pathway is an important target for antimalarial chemotherapy. Quinoline antimalarials, such as CQ

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    Chloroquine caps hemozoin molecules to prevent further biocrystallization of heme, thus leading to heme buildup. Chloroquine binds to heme or FP to form the FP-chloroquine complex; this complex is highly toxic to the cell and disrupts membrane function. Hemozoin Biocrystallization in Plasmodium falciparum and the antimalarial activity of crystallization inhibitors. Quinine extracted from the bark of the South American Cinchona spp tree was the first of all antimalarials in western medicine and had been used since the 17th century. It acts by inhibiting the hemozoin biocrystallization, thus facilitating an aggregation of cytotoxic heme. Quinine is less effective and more toxic as a blood schizonticidal agent than chloroquine ; however, it is still very effective and widely used in the treatment of acute cases of severe P. falciparum.

     
  8. R.Paul (PS) Well-Known Member

    Chloroquine has long been used in the treatment or prevention of malaria from Plasmodium vivax, P. malariae, excluding the malaria parasite Plasmodium falciparum, for it started to develop widespread resistance to it. Pharmacokinetics of Chloroquine and Metronidazole in Rats Pharmacology of Chloroquine and Hydroxychloroquine Springer. Evaluation of the effect of some common Nigerian vegetables.
     
  9. bcot Guest

    Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses SIDE EFFECTS. The following adverse reactions have been identified during post-approval use of PLAQUENIL or other 4-aminoqunoline compounds. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

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