Plasmodium Inhibitor

Chloroquine is an antimalarial and anti-inflammatory agent widely used to treat malaria and rheumatoid arthritis. Chloroquine is an autophagy and toll-like receptors (TLRs) inhibitor. Chloroquine is highly effective in the control of SARS-CoV-2 (COVID-19) infection in vitro (EC₅₀=1.13 μM).

Hydroxychloroquine (HCQ) is a synthetic oral antimalarial drug that can be used in the study of malaria and autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. Hydroxychloroquine is a potent autophagic flux inhibitor with antiviral activity (such as SARS-CoV-2 virus) that inhibits Toll-like receptor 7/9 (TLR7/9) signaling.

Chloroquine phosphate is an antimalarial and anti-inflammatory agent widely used to treat malaria and rheumatoid arthritis. Chloroquine phosphate is an autophagy and toll-like receptors (TLRs) inhibitor. Chloroquine phosphate is highly effective in the control of SARS-CoV-2 (COVID-19) infection in vitro (EC₅₀=1.13 μM).

Artemisinin (Qinghaosu), a sesquiterpene lactone, is an anti-malarial agent isolated from the aerial parts of Artemisia annua L. plants. Artemisinin inhibits AKT signaling pathway by decreasing pAKT in a dose-dependent manner. Artemisinin reduces cancer cell proliferation, migration, invasion, tumorigenesis and metastasis and has neuroprotective effects.

MMV019662 TFA is a PfNCR1 inhibitor and antimalarial agent. MMV019662 TFA reduces gametocytemia levels of Plasmodium falciparum. MMV019662 TFA is applicable to malaria-related research.

Sterekunthal B is a naphthoquinone compound and antimalarial agent. Sterekunthal B can be isolated from plants of the Bignoniaceae family, including the root bark of Stereospermum colais. Sterekunthal B inhibits the growth of Chloroquine (HY-17589A)-sensitive Plasmodium falciparum strain PoW with an IC₅₀ of 23.3 μg/mL. Sterekunthal B also inhibits the growth of Chloroquine-resistant Plasmodium falciparum strain Dd2 with an IC₅₀ of 15.2 μg/mL. Sterekunthal B exhibits non-selective cytotoxicity toward endothelial cells. Sterekunthal B can be used in malaria-related research.

Antimalarial agent 63 is an inhibitor of Plasmodium falciparum. Antimalarial agent 63 exhibits inhibitory activity against field isolates of Plasmodium falciparum and Plasmodium vivax. Antimalarial agent 63 shows an antagonistic interaction when used in combination with Proguanil (HY-B0806) against Plasmodium falciparum. Antimalarial agent 63 has low cytotoxicity to hepatocytes and a high selectivity index. Antimalarial agent 63 can be used in the research of malaria.

Hydroxychloroquine sulfate (HCQ sulfate) is a synthetic antimalarial agent which can also inhibit Toll-like receptor 7/9 (TLR7/9) signaling. Hydroxychloroquine sulfate is efficiently inhibits SARS-CoV-2 infection in vitro.

Halofuginone (RU-19110), a Febrifugine derivative, is a competitive prolyl-tRNA synthetase inhibitor with a K_i of 18.3 nM. Halofuginone is a specific inhibitor of type-I collagen synthesis and attenuates osteoarthritis (OA) by inhibition of TGF-β activity. Halofuginone is also a potent pulmonary vasodilator by activating Kv channels and blocking voltage-gated, receptor-operated and store-operated Ca²⁺ channels. Halofuginone has anti-malaria, anti-inflammatory, anti-cancer, anti-fibrosis effects.

Atovaquone (Atavaquone) is a potent, selective and orally active inhibitor of the parasite’s mitochondrial cytochrome bc1 complex. Atovaquone is against human and P. falciparum cytochrome bc1 activity with IC₅₀ values of 460 nM and 2.0 nM, respectively. Atovaquone is an antimalarial agent and has the potential for the investigation of neumocystis pneumonia, toxoplasmosis, malaria, and babesia.

RRx-001, a hypoxia-selective epigenetic agent and studied as a radio- and chem-sensitizer, triggers apoptosis and overcomes agent resistance in myeloma. RRx-001 exhibits potent anti-tumor activity with minimal toxicity. RRx-001 is a dual small molecule checkpoint inhibitor by downregulating CD47 and SIRP-α. RRx-001 is a potent inhibitor of G6PD and shows potent antimalarial activity.

Artemether is an anti-malarial compound that targets drug-resistant strains of falciparum malaria.

Quinine is an orally active alkaloid extracted from cinchona bark, possessing various biological activities including antimalarial, antidengue virus (DENV), and anticancer properties. Quinine is a potassium channel inhibitor that inhibits WT mouse Slo3 (K_Ca5.1) channel currents evoked by voltage pulses to +100 mV with an IC₅₀ of 169 μM.

Clindamycin is an orally active and broad-spectrum bacteriostatic lincosamide antibiotic. Clindamycin can inhibit bacterial protein synthesis, possessing the ability to suppress the expression of virulence factors in Staphylococcus aureus at sub-inhibitory concentrations (sub-MICs). Clindamycin resistance results from enzymatic methylation of the antibiotic binding site in the 50S ribosomal subunit (23S rRNA). Clindamycin decreases the production of Panton-Valentine leucocidin (PVL), toxic-shock-staphylococcal toxin (TSST-1) or alpha-haemolysin (Hla). Clindamycin also can be used for researching malaria.

Primaquine is a potent antimalaria agent and a potent gametocytocide in falciparum malaria. Primaquine prevents relapse in vivax and ovale malaria.

Amodiaquine (Amodiaquin), a 4-aminoquinoline class of antimalarial agent, is a potent and orally active histamine N-methyltransferase inhibitor. Amodiaquine is also a Nurr1 agonist and specifically binds to Nurr1-LBD (ligand binding domain) with an EC₅₀ of ~20 μM. Anti-inflammatory effect.

Quinacrine (Mepacrine) dihydrochloride is an orally bioavailable antimalarial agent, which possess anticancer effect both in vitro and vivo. Quinacrine dihydrochloride suppresses NF-κB and activate p53 signaling, which results in the induction of the apoptosis.

Dehydrocorydaline (13-Methylpalmatine) is an alkaloid that regulates protein expression of Bax, Bcl-2; activates caspase-7, caspase-8, and inactivates PARP. Dehydrocorydaline elevates p38 MAPK activation. Anti-inflammatory and anti-cancer activities. Dehydrocorydaline shows strong anti-malarial effects (IC₅₀=38 nM), and low cytotoxicity (cell viability > 90%) using P. falciparum 3D7 strain.

Nitidine chloride, a potential anti-malarial lead compound derived from Zanthoxylum nitidum (Roxb) DC, exerts potent anticancer activity through diverse pathways, including inducing apoptosis, inhibiting STAT3 signaling cascade, DNA topoisomerase 1 and 2A, ERK and c-Src/FAK associated signaling pathway, also has anti-inflammatory activity. Nitidine chloride inhibits LPS-induced inflammatory cytokines production via MAPK and NF-kB pathway.

Mefloquine hydrochloride (Mefloquin hydrochloride), a quinoline antimalarial agent, is an anti-SARS-CoV-2 entry inhibitor. Mefloquine hydrochloride is also a K⁺ channel (KvQT1/minK) antagonist with an IC₅₀ of ~1 μM. Mefloquine hydrochloride can be used for malaria, systemic lupus erythematosus and cancer research.