It accumulates inside the acidic parts of the cell, including endosomes and lysosomes. This accumulation leads to inhibition of lysosomal enzymes that require an acidic p H, and prevents fusion of endosomes and lysosomes. TLR7/8-Mediated Activation of Human NK Cells Results in Accessory Cell-Dependent IFN- Production. Chagas disease is treated with chloroquine Hydroxychloroquine dosage aao The IC50 values were calculated as described in Section 2.2. 3. Results and discussion. The IC50 and selectivity index SI values of extracts that demonstrated significant antiplasmodial activity IC50≤5 μg/ml against the chloroquine sensitive strain of Plasmodium falciparum NF54 are shown in Table 1. The standard drugs are chloroquine and artemisinin which are run in the same assay. The IC 50 values for chloroquine are 2.9 ng/ml for NF54 range 1.6 – 4.5 ng/ml and 48 ng/ml range 19 – 66 ng/ml for K1; for artemisinin the IC 50 values are 1.9 ng/ml range 0.8 – 2.4 ng/ml for NF54 and 0.8 ng/ml range 0.4 – 1.5 ng/ml for K1. Clusiaceae and exhibited antimalarial activity against NF54 with IC50 ranging from 2.5 to 4.1 μ m. 35 A new bisnortriterpene quinone methide, 20‐epi‐isoiguesterinol 211 and a known compound, isoiguesterin 210, were isolated from the petroleum ether extract of the roots of Salacia madagascariensis DC. Celastraceae. Moreover, Chloroquine inhibits autophagy as it raises the lysosomal p H, which leads to inhibition of both fusion of autophagosome with lysosome and lysosomal protein degradation . Chloroquine is commonly used to study the role of endosomal acidification in cellular processes [2, 3], such as the signaling of intracellular TLRs. Nf54 chloroquine ic50 New antiprotozoal agents Synthesis and biological evaluation of., Malaria in vitro screening model Does plaquenil reduce feversWhat is the mechanism of action of chloroquine and primaquine RESULTS Cryptolepis sanguinolenta IC50 = 49.65 nM and its major alkaloid, cryptolepine IC50 = 1965 nM, showed high inhibitory activity against the late stage gametocytes of P. falciparum NF54. In the interaction assays in asexual stage, cryptolepine showed an additive effect with both lumefantrine and chloroquine with mean ΣFIC50s of 1.017 ± 0.06 and 1.465 ± 0.17, respectively. In Vitro Anti-Malarial Interaction and Gametocytocidal Activity of.. Antimalarial compounds isolated from plants used in.. Novel orally active antimalarial thiazoles — Monash University. The IC50 value for the chloroquine-sensitive NF54 strain was 97 μΜ and 501 µM for the R strain. Monitoring polyamine pools after treatment with dicyclohexylamine leads to a significant decrease in the intracellular spermidine content, which was nearly reversed by supplementation with spermidine. Ic50 liver stage Plasmodium berghei infection IC 50 = 1.05 µM Plasmodium berghei; chloroquine-sensitive Plasmodium falciparum NF54 IC 50 = 8.2 µM; HepG2 IC 50 = 100 µM human For Research Use Only. A severe eye problem has happened with chloroquine. This may lead to lasting eyesight problems. The risk may be higher if you have some types of eye or kidney problems. The risk may also be higher with some doses of chloroquine, if you use chloroquine for longer than 5 years, or if you take certain other drugs like tamoxifen.