Lysosomes ph and the antimalarial action of chloroquine

Discussion in 'Hydroxychloroquine' started by Alex_cypher, 16-Mar-2020.

  1. Lysosomes ph and the antimalarial action of chloroquine

    For decades, the drug was a front-line treatment and prophylactic for malaria. In a three-page paper published Tuesday in Cell Research, scientists at the Wuhan Institute of Virology’s State Key Laboratory of Virology write that both chloroquine and the antiviral remdesivir were, individually, “highly effective” at inhibiting replication of the novel coronavirus in cell culture.

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    Somes and lysosomes such as STX17 could be used at least in cell culture experiments, pharmacological inhibition is more kinetically controllable, and is the most frequently employed strategy for both in vitro and in vivo studies. The most widely employed chemicals that inhibit the last stage of autophagy are chloroquine CQ, bafilomycin A 1 BafA Jul 30, 2019 Before the administration of chloroquine, the patient had only a mild skin erythema in the irradiated area, which was consistent with the radiotherapy dose she had received. On day 3 of chloroquine therapy, she developed localized brisk bullous eruptions in the irradiated area, which developed into a patch of fulminant moist desquamation. Jan 23, 2017 Chloroquine analog is a diprotic weak base. The unprotonated form of chloroquine diffuses spontaneously and rapidly across the membranes of cells and organelles to acidic cytoplasmic vesicles such as endosomes, lysosomes, or Golgi vesicles and thereby increases their pH Al‐Bari 2015.

    “It’s interesting in that it really lacks a lot of details but, nevertheless, if you look at the data as presented, at least in vitro, it seems like chloroquine can be used as an early-stage drug,” he said. Their drug screen evaluated five other drugs that were not effective. Though the paper is brief, John Lednicky, a professor at the University of Florida’s Emerging Pathogens Institute, found its results intriguing.

    Lysosomes ph and the antimalarial action of chloroquine

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  6. Lysosomes and drug resistance in malaria. The introduction of chloroquine for malaria in the late 1940s was a great advance on quinine and mepacrine. It was cheap, non-toxic, and soon became the mainstay of therapy and prevention. For 10 years it was used successfully throughout the tropics.

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    Chloroquine raises the pH in host-cell lysosomes, which interferes with viruses’ attempts to acidify the lysosomes, a prerequisite to formation of the autophagosomes that cells use to eat themselves. In the Cell Research paper, the researchers found that the drug was effective at inhibiting the virus as it was both entering and exiting cells. Lysosomes, ip/iH and the Anti-malarial Action of Chloroquine. Skip to main content. Thank you for visiting. The genomic architecture of antimalarial drug resistance Chloroquine accumulates preferentially in lysosomes and raises intralysosomal pH, which in turn increases the permeability and volume of lysosomes. The increased intralysosomal pH produced by chloroquine analogues may not be sufficient to cause cellular damage specifically in tumour cells at therapeutically achievable concentrations.

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