Hot Natural Products & Bioactive Compounds

1. 1,4,5,6-Tetrahydroxy-7-prenylxanthone exhibits moderate activities with GI50 (Growth inhibitory) values of 2.8 μM against the human leukaemic HL-60 cell line were measured in vitro.
2. 1,4,5,6-Tetrahydroxy-7-prenylxanthone shows moderate cytotoxicities against breast cancer (MDA-MB-435S) and lung adenocarcinoma (A549) cell lines.

Spinosin has neuroprotective, anxiolytic-like and anti-inflammatory effects, it ameliorated memory impairment induced through AβO, the serotonergic neurotransmitter system, it also potentiated pentobarbital-induced sleep via the serotonergic system.

1. Sideroxylonal A, isolated from the benzene extract of the leaves of Eucalyptus grandis, is a highly potent repellent.

1. 1α,4β,7β-Eudesmanetriol and 1β,4β,7β-Eudesmanetriol can inhibit growth of Pseudomonas stutzeri with a MIC value of 117 uM, they also show remarkable activities against acetylcholinesterase enzyme with IC50 values ranging between 25 and 26 uM.

1. Eucamolol exhibits significant repellent activity against Aedes albopictus, and inhibits its feeding as well as DEET, is effective repellent (75%) up to 3 h after exposure to mosquito.

1. Camaric acid, lantanilic acid, and oleanolic acid possess nematicidal activity, they exhibit 95%, 98% and 70% mortality respectively against root-knot nematode Meloidogyne incognita at 0.5% concentration.
2. Camaric acid shows antibacterial activity against Staphylococcus aureus and methicillin resistant S. aureus with IC50 values 8.74 and 8.09 uM, respectively, it also shows moderate antileishmanial activity and highly potent antitrypanosomal activity.
3. Camaric acid shows anticancer activity.
4. Camaric acid shows significant topical anti-inflammatory activity with IC50 value of 0.67 mg/ear in the assay of TPA mouse ear oedema model.

Benzyl 2,6-dimethoxybenzoate shows antimicrobial activity against several bacteria (S. aureus, E. coli, P. aeruginosa, and B. subtilis) and fungi (C. albicans and T. mentagrophytes).

1. Rocaglaol is a cytotoxic cyclopenta[b]benzofuran, shows in vitro cytotoxic activity against Lu1, LNCaP and MCF-7 cells with ED50 values of 13.8, 23.0 and 9.2 nM, respectively.
2. Rocaglaol is a potent anticancer drug that induces apoptosis of LNCaP cells through the mitochondrial pathway and its G2/M-phase cell cycle arrest is associated with the down-regulation of Cdc25C and the dephosphorylation of Cdc2.
3. Rocaglaol can reduce tissue inflammation and neuronal cell death by inhibiting NF-kappa B and AP-1 signaling, resulting in significant neuroprotection in animal models of neurodegeneration.
4. Rocaglaol derivatives can prevent or to limit the cardiotoxicity of an antineoplastic agent, in particular to prevent or to limit the apoptosis of cardiomyocytes induced by such agent.
5. Rocaglaol, pyrimidinone and aglaiastatin are potent inhibitors of the growth of K--cells, with IC50 values of 1-10 ng/mL, and induce normal morphology in K--cells at 10-30 ng/mL, they also specifically inhibit protein synthesis.