Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take chloroquine with all of your drugs and health problems. Methotrexate trexall and hydroxychloroquine plaquenil Hydroxychloroquine toxicity monitoring Mechanism of Action Chloroquine, a 4-aminoquinoline, is an anti-protozoal agent. The precise mechanism by which Chloroquine exhibits activity is not known. Chloroquine, may exert its effect against Plasmodium species by concentrating in the acid vesicles of the parasite and by inhibiting polymerization of heme. It can also inhibit certain enzymes by its interaction with DNA. The mechanism through which chloroquine is acting on cancer cells has mainly been attributed to the inhibition of autophagy as a consequence of its lysosomotropic properties 13, 24. Consistently, we also observed a strong inhibitory effect of chloroquine on autophagy in the established PDAC cell lines previously used in the cited studies. Chloroquine in Cancer Therapy A Double-Edged Sword of Autophagy Tomonori Kimura, Yoshitsugu Takabatake, Atsushi Takahashi, and Yoshitaka Isaka Abstract Autophagy is a homeostatic cellular recycling system that is responsible for degrading damaged or unnecessary cellular organelles and proteins. For all uses of chloroquine: WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Do not start, stop, or change the dose of any drug without checking with your doctor. Chloroquine mechanism autophagy Chloroquine Modes of action of an undervalued drug., Chloroquine Targets Pancreatic Cancer Stem Cells via Inhibition of. Hydroxychloroquine sulphate mechanism of actionHydroxychloroquine success stories Among them, only CQ and its derivate hydroxychloroquine HCQ are FDA-approved drugs and are thus currently the principal compounds used in clinical trials aimed to treat tumors through autophagy inhibition. However, the precise mechanism of how CQ blocks autophagy remains to be firmly demonstrated. Chloroquine inhibits autophagic flux by decreasing autophagosome.. Chloroquine in Cancer Therapy A Double-Edged Sword of Autophagy. Chloroquine - Wikipedia. Chloroquine is commonly used to study the role of endosomal acidification in cellular processes 2, 3, such as the signaling of intracellular TLRs. Moreover, Chloroquine inhibits autophagy as it raises the lysosomal pH, which leads to inhibition of both fusion of autophagosome with lysosome and lysosomal protein degradation 4. References. 1. Chloroquine CQ, an antimalarial lysosomotropic agent, has been identified as a potential adjuvant in the treatment regimen of GBMs. However, the mechanism of CQ-induced tumor cell death is poorly defined. We and others have shown that CQ-mediated cell death may be p53-dependent and at least in part due to the intrinsic apoptotic death pathway. Herein, we report results of administration of rapamycin, a specific inhibitor of the mechanistic target of rapamycin mTOR signaling pathway, and chloroquine, a lysosomal inhibitor which reverses autophagy by accumulating in lysosomes, responsible for blocking autophagy in 20-month old VCPR155H/+ mice.