Background: Marine sponges provided a great source of natural products with promising biological activity. This study was aimed to investigate the chemical constituents of methanol extracts of selected Indonesian marine sponges (Callyspongia sp., Clathria sp., Melophlus sarasinorum, and Xestospongia sp.), collected from the Saponda Islands, Southeast Sulawesi, Indonesia as well as to evaluate their antimicrobial and antioxidant activities. Methods: LCMS/MS analysis used to identify the compounds. Agar well diffusion and DPPH assays were used to evaluate the antimicrobial and antioxidant activities. Results: Chemical screening reported alkaloids, terpenoids, steroids, and saponins from all investigated sponges. The LC-MS/MS analysis identified various compounds which mainly contained steroids. Antimicrobial activity (against Bacillus subtilis, Escherichia coli, Salmonella enterica, and Candida albicans) was only shown by the Xestospongia sp. extract. Meanwhile, extracts of M. sarasinorum, Xestospongia sp., and Callyspongia sp. exhibited potent radical scavenging activity. Conclusion: The study concluded that the selected sponges could provide various groups of compounds. Methanol extracts of these sponges could be used as sources of antimicrobial and antioxidant agents.
Two known compounds, namely stigmast-4-en-6β-ol-3-one (1) and p-hydroxybenzoic acid (2) are firstly reported from stems of E. elatior. Isolation were carried out by chromatography technique including Thin Layer Chromatrography (TLC), vacuum liquid chromatography (VLC) and radial chromatography (RC) with silica gel as adsorbent and mixture of solvents as eluen. Structure of isolated compounds were determined by spectroscopy methods i.e. FTIR, 1H and 13C NMR and also by comparison the spectroscopies data with the same data from references. Biological activities of isolated compounds evaluated against some bacteria consist of Bacillus subtilis FNCC 0060, Escherichia coli ATCC 35218, Pseudomonas aeruginosa ATCC 27853, Salmonella enterica ATCC 14028, Staphylococcus aureus ATCC 25923, dan Streptococcus mutans ATCC 25175 and also against DPPH (2,2-diphenil 1-pichylhydazyl) radical as antiradical scavenger activity. The result showed that generally, antibacterial potency those samples i.e. methanol extract, stigmast-4-en-6β-ol-3-one and p-hydroxybenzoic acid less active than positive control (chloramphenicol). Individually, antibacterial activity of p-hydroxybenzoic acid > methanol extract > stigmast-4-en-6 β-ol-3-one. In addition, p-hydroxybenzoic acid is the most active against S. mutans. Radical scavenger activity of tested samples is less active than than positive control (ascorbic acid). Furthermore, the radical scavenger potency of p-hydroxybenzoic acid > methanol extract > stigmast-4-en-6 β-ol-3-one.
Galing (Cayratia trifolia Domin.) have been used empirically to treat various diseases, one of them is antidiabetic. Objective: To determine the phytochemical content and the activity of the ethanol extract of the galing stem as antioxidant and antidiabetic. Method: The galing stem extract was investigated for phytochemical by Thin Layer Chromatography (TLC) and its antioxidant activity using DPPH scavenging activity assay. In vivo, antidiabetic test was conducted by animal diabetes modeling that has given streptozotocin 150 g/kg BW and 10% of sucrose solution intraperitoneally. The average level of fasting blood glucose at 307 mg/dL. Mice were divided into 6 groups, normal control group, diabetes induction group, positive group (treated by glibenclamide) and treatment group consisted of three groups were treated by ethanol extract of galing stem in dose 400, 500, and 600 mg/kg BW, respectively. Mice treated with appropriate doses of each treatment once a day for 7 days. The measuring blood glucose level was using a photometer 5010V5+. Results: The ethanol extract of galing stem contained the alkaloid, flavonoid, saponin, tannin, and triterpene. It is potential as an antioxidant with the IC 50 61,52 mg/L which indicated that the extract had strong antioxidant. The antidiabetic activity showed that the effect of extract 400 and 500 mg/kg BW are not different significantly with glibenclamide in reducing blood glucose levels subset of the statistics ANOVA (p> 0.05). Conclusion: The ethanol extract of galing steam is potent as an antioxidant due to the phytochemical content inside particularly the flavonoid compound. Key words: Antioxidant, Antidiabetic, Galing stem, Mice, Phytochemical. Indonesian people as traditional medicine is galing (Cayratia trifolia Domin). The roots of galing have been used empirically to treat various diseases, such as poultice on boil surface. The seeds infuse and galing bulbs extract traditionally been used for diabetic patients to lower the blood sugar levels, galing also has efficacious as anti-diuretic, anti-tumor, neuralgia, and splenopathy. The bulbs commonly are used in snakebite treatment. 7 Research conducted by Batra et al. 8 showed that flavonoids contained by the galing roots have antidiabetic effect which improves pancreatic β-cells that have been damaged. 8 However, the activity of galing stem as antidiabetic has not been tested scientifically. Therefore we are interested in conducting the antioxidant activity and antidiabetic effects of stem galing ethanol extract in mice by of streptozotocin inducing method. 687 0.1 M, FeCl 3 1%, sucrose 10%, citrate buffer and TLC silica gel plate of 60 GF254 was purchased from Merck. Distilled water was obtained through a Millipore-Q50 Ultrapure water system (Sartorius). The stock solution of DPPH (c = 100 mg/L) was prepared by dissolving 5 μg of DPPH with 20 ml ethanol and diluted to 50 ml. The stock solution of ascorbic acid (c = 100 mg/L) was prepared by dissolving 5 mg with 10 ml ethanol and diluted to 50 ml in the flask. M...
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