Chloroquine autophagic flux

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  1. alchet New Member

    Chloroquine autophagic flux


    Pharmacological modulators of this pathway have been extensively utilized in a wide range of basic research and pre-clinical studies. Bafilomycin A1 and chloroquine are commonly used compounds that inhibit autophagy by targeting the lysosomes but through distinct mechanisms.

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    To analyze autophagic flux, MET4 cells were transfected with mRFP-GFP-LC3 also known as tandem fluorescence-LC3, tf-LC3 expressing plasmid and Fugene HD 2/6 ratio as per the manufacturer's instructions Roche, Germany. Cells were pooled, seeded in chamber slides and left untreated to avoid transfection-induced autophagy. A HOS-EGFP-LC3 cells were starved of amino acids or chloroquine CQ treated for 4 hours or left untreated. EGFP fluorescence was measured by FACS either without top or with bottom a wash with PBS containing 0.05% saponin. Chloroquine inhibits the fusion of the autophagosome to the lysosome, thereby permitting the quantitation of the autophagosome formation as a measure of the degree of autophagy by arresting autophagic flux before the lysosomal degradation can occur 18.

    To address this, we cultured primary rat cortical neurons from E18 embryos and used the Seahorse XF96 analyzer and a targeted metabolomics approach to measure the effects of bafilomycin A1 and chloroquine on bioenergetics and metabolism. Since it is now clear that mitochondrial quality control, particularly in neurons, is dependent on autophagy, it is important to determine whether these compounds modify cellular bioenergetics.

    Chloroquine autophagic flux

    Autophagy mediator of cellular homeostasis and cell survival, Flow Cytometry for autophagy - alphavirus

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  6. Assessment of Chloroquine Treatment for Modulating Autophagy Flux in Brain of WT and HD Mice. Note Correspondence to Petr Vodicka, Department of Neurology, Massachusetts General Hospital, 114 16th Street, Charlestown, MA 02129, USA.

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    However, when compared with basal autophagy levels using chloroquine, autophagosome accumulation was a result of impaired autophagic flux. Only 6-OHDA induced an increase in autophagosome formation. Overexpression of a dominant negative form of Atg5 increased paraquat- and MPP +-induced cell death. The term “autophagic flux” is used to denote the dynamic process of autophagosome synthesis, delivery of autophagic substrates to the lysosome, and degradation of autophagic substrates inside the lysosome and is a more reliable indicator of autophagic activity than measurements of autophagosome numbers. Autophagic flux is a measure of efficiency or throughput of the pathway. Here, we describe a method for determining autophagic flux in vitro and in vivo using the autophagosomal/lysosomal fusion inhibitors chloroquine or bafilomycin A1 and then probing for the autophagosomal marker LC3-II via Western Blot.

     
  7. KasSEOpeya Moderator

    DISCLAIMER: The information contained herein should NOT be used as a substitute for the advice of an appropriately qualified and licensed physician or other health care provider. Hydroxychloroquine - Side Effects, Dosage, Interactions. Plaquenil & Gabapentin - Lupus and Fibromyalgia" Lupus. Hydroxyzine - Side Effects, Dosage, Interactions - Drugs.
     
  8. sliva Well-Known Member

    Plaquenil - FDA prescribing information, side effects and uses Peak plasma levels of hydroxychloroquine were seen in about 3 to 4 hours. Renal clearance in rheumatoid arthritis RA patients taking Plaquenil for at least six months seemed to be similar to that of the single dose studies in volunteers, suggesting that no change occurs with chronic dosing.

    Plaquenil vs. Rheumatrex, Trexall Prescription Treatment for Rheumatoid.