INHIBITION OF INTERFERON PRODUCTION BY CHLOROQUINE DIPHOSPHATE

Chloroquine diphosphate

Human toxicity Chloroquine is a potentially fatal poisoning, often characterized by rapid deterioration. Features of toxicity may develop within 1 to 2 h, and death may occur abruptly, generally from myocardial depression and dysrhythmia. Symptoms at an acute overdose are as following: hyperexcitability, agitation, seizures, cerebral edema, ventricular dysrhythmia, hypotension, shock, cardiac a...

Enhancement of human interferon production by neutral red and chloroquine: analysis of inhibition of protein degradation and macromolecular synthesis

Two lysosomotrophic drugs, neutral red and chloroquine, enhance polyinosinic:polycytidylic acid-induced interferon production by a strain of diploid human fibroblasts (FS-4). Treatment of cells with neutral red or chloroquine between 2.5 and 3.5 h after induction increases interferon yields 16- to 64- and 4- to 16-fold, respectively, in the subsequent 20.5 h. The two drugs inhibit the rates of ...

Inhibition of autophagy by chloroquine stimulates nitric oxide production and protects endothelial function during serum deprivation.

BACKGROUND/AIMS Autophagy plays a fundamental role in cell survival under stress conditions such as nutrient deprivation. Decreased nitric oxide (NO) production, which may contribute to vascular dysfunction, is one of the consequences of autophagy in endothelial cells. The antimalarial drug chloroquine (CLQ) inhibits autophagy by blocking autophagosome formation and has been proposed as adjuvan...

Kinase Signaling by Chloroquine Inhibition of Mitogen-Activated Protein

Inhibition of heme aggregation by chloroquine reduces Schistosoma mansoni infection.

Adult Schistosoma mansoni digest large amounts of host hemoglobin and release potentially toxic heme inside their guts. We have previously demonstrated that free heme in S. mansoni is detoxified through aggregation, forming hemozoin (Hz). Possible mechanisms of heme aggregation and the effects of chloroquine (CLQ) on formation of Hz and on the viability of this parasite have now been investigat...