Objective: This study aimed to evaluate the cytotoxic activity of the extracts and fractions of Eriocaulon cinereum against HeLa and Vero cell lines,which represent cervical cancer and normal cells, respectively. In addition, a phytochemical screening was carried out to determine the chemicalconstituents in the extracts and the active fractions.Materials and Methods: The extracts of E. cinereum were obtained by ultrasound-assisted extraction method using n-hexane, ethyl acetate, andmethanol, successively. The active extract was fractionated using vacuum liquid chromatography with dichloromethane followed by ethyl acetate. Thecytotoxic activity was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay method and was measured using microplatereader at the wavelength 595 nm. The data were analyzed with PROBIT from SPSS 16 for Windows®. In addition, phytochemical screening wasperformed using standard procedures.Results: The cytotoxic evaluation of the extracts of E. cinereum showed that the ethyl acetate extract was the most active extract against HeLa cell linewith the half maximal inhibitory concentration (IC50) value of 580.07 μg/ml. The dichloromethane and ethyl acetate fractions from the active extractof E. cinereum exhibited cytotoxic activity against HeLa cell with the IC50 values of 466.61 μg/ml and 267.34 μg/ml, respectively. In addition, the ethylacetate fraction showed a low cytotoxic effect against Vero cell line. The phytochemical screening of the ethyl acetate fraction indicated the presenceof terpenoids and alkaloids.Conclusion: This finding revealed the anticancer potential of E. cinereum and warranted further investigation for the discovery of new anticanceragents from natural resources for cervical cancer.
Background: Lavender oil is widely known to possess a relaxant effect to relieve stress, anxiety, and depression. Linalyl acetate, linalool, geranyl acetate, and β-caryophyllene were the major constituents of lavender oil that potentially act on NMDAR (N-methyl-d-aspartate receptors), and emerging targets in the treatment of depression. Objective: This study aims to predict the binding of lavender compounds to NMDA receptors using an in silico model. Methods: The ligands of the docking study were four major chemical compounds of lavender oil, i.e., linalyl acetate, linalool, geranyl acetate, and β-caryophyllene. 5YE was defined as a native ligand, while memantine, an NMDAR antagonist, was used as a reference ligand. The NMDAR structure was taken from Protein Data Bank (ID 5H8Q), while the lavender compound was sketched in Chem3D. Autodock 4.2 was used to perform the docking analysis. Results: The result showed that beta-caryophyllene had the most potent interaction with NMDAR (free binding energy was -8.02 kcal/mol and inhibitory constant was 1.32 µM). Conclusion: The docking results suggest that beta-caryophyllene could be an NMDAR antagonist and be developed as a treatment for depression.
Depression is a heterogeneous disorder with more than one possible etiologies. Currently, studies are mostly focused on neuronal dysfunction, while the involvement of other brain cells, such as microglia, has not been widely explored. This review aimed to systematically review the studies reporting the effect of microglia inhibitors on depressive-like behavior in rodent models, to obtained a better understanding of the effectiveness of the intervention against depression. The PubMed database was explored from January 2011 to April 2021 with related keywords for full-text publications reporting antidepressant effects of microglial inhibitor in rodents. We identified 713 research publications, of which only 25 studies met the inclusion criteria and were included for analysis. Administration of antidepressant drugs/compounds that inhibit microglia was reported to be beneficial because it improved depression-like symptoms by reducing outcomes based on immobility, anhedonia, and locomotor activity. Microglia inactivation has been reported to occur through inhibition of the HMGB1/TLR4/NF-B and NLRP3/NF-κB pathways, as well as improved communication of microglia neurons through increased interaction of CX3CL1 with CX3CR1. These data indicated that the use of an agent inhibiting microglia activity is promising as a strategy in overcoming depression in humans.
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