@article {755, title = {Comparison between High Performance Thin Layer Chromatography and High Performance Liquid Chromatography Methods for Determination of Rubraxanthone in the Stem Bark Extract of Garcinia cowa Roxb}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {November 2018}, pages = {s42-s47}, type = {Original Article}, chapter = {s42}, abstract = {

Objectives: To develop simple, rapid, accurate methods for determination of rubraxanthone in the stem bark extract of Garcinia cowa using High Performance Thin Layer Chromatography (HPTLC) and High Performance Liquid Chromatography (HPLC). Methods: The HPTLC method was performed on aluminum plate precoated with silica gel 60 F254 using Chloroform: Ethyl acetate: Methanol: Formic acid (88:2:2:8) as a developing system. Quantification was achieved using densitometric measurements at 243 nm. The HPLC method involved a 5 \μm C18 column and an isocratic solvent using 0.4\% formic acid: methanol (12:88) with a flow rate 1 mL minute-1. Quantitation was also achieved with ultraviolet detection at 243 nm based on peak area. All necessary validation tests for both methods were done for their comparison. The results obtained by these two different quantification methods were compared by Tukey\’s-test. Results: Both assays provided good linearity, accuracy, precision, specificity and limits of detection and quantitation for determination of rubraxanthone in The Stem Bark extract of G. cowa. Conclusion: Both methods revealed reasonable validation parameters concerning linearity, accuracy, precision, specificity and limits of detection and quantitation. A statistical comparison of the quantitative analysis of rubraxanthone in extract did not show any statistically significant difference between two analysis methods. As both methods were found to be equal, they therefore can be used for the analysis of rubraxanthone in the Stem Bark extract of G. cowa.

}, keywords = {Garcinia cowa Roxb, High Performance Liquid Chromatography, High performance Thin layer Chromatography, rubraxanthone}, doi = {10.5530/pj.2018.6s.8}, author = {Meri Susanti and Sanusi Ibrahim and Yahdiana Harahap and Dachriyanus} } @article {82, title = {Cytotoxicity Study of Ethanol Extract of the Leaves of Asam Kandis (Garcinia cowa Roxb.) on T47D Breast Cancer Cell line}, journal = {Pharmacognosy Journal}, volume = {7}, year = {2015}, month = {Nov-Dec 2015}, pages = {369-371}, type = {Original Article}, chapter = {369}, abstract = {

Objective: To investigate the cytotoxic effect of ethanolic extract of the leaves of asam kandis (Garcinia cowa Roxb.) against T47D breast cancer cells. Methods: The cytotoxicity of ethanol extract was carried out by measuring the activity of mitochondrial dehydrogenase in living cells that have ability to convert dissolved MTT pale yellow to purple formazan product. The extract was added at various concentrations (0.1, 1, 10 and 100 \μg/mL). The level of cytotoxicity was determined by calculating the IC50 value that was based on the percentage of the cell death after 24 hours treatment with the extract. Cell morphological changes were observed by using inverted microscope. Results: The IC50 value showed that ethanol extract of leaves of asam kandis could resist T47D breast cancer cells with IC50 6.13 \± 3.51 \μg/mL. The statistic results proved that ethanol extract of the leaves of asam kandis could inhibit the growth of T47D breast cancer cells significantly at concentrations of 10 \μg/mL and 100 \μg/mL. Conclusion: The results suggest that ethanol extract of the leaves of asam kandis was potential source of herbal medicine for cancer-related ailments.

}, keywords = {Asam kandis, Beast cancer, Cytotoxicity, Garcinia cowa Roxb, MTT Assay, T47D.}, doi = {10.5530/pj.2015.6.9}, author = {Fatma Sri Wahyuni and Dini Hara Triastuti and Helmi Arifin} }