RESUMEN
Symbiotic association between marine sponge and microorganism was a promising chance in the discovery of leadcompound of anticancer. This association was probably concluded that symbiotic microorganism would contain thesame secondary metabolites with the host. In this continuation research, we had isolated symbiotic bacteria from amarine sponge and tested for cytotoxic activity. Twenty-six isolates of bacteria derived from marine sponge Haliclonafascigera were isolated from Setan Island, West Sumatra, Indonesia. Screening of cytotoxic activity by BSLT methodand MTT assay was conducted toward 21 ethyl acetate extracts of symbiotic bacteria with weight >50 mg. Onebacterial extract with code H2N was very toxic according to BSLT test, while 18 isolates were toxic with LC50 rangingfrom 31.17 to 283.38 ppm. All of the bacterial extracts did not show a good percentage of viability (>50%) againstHela, WiDr, T47D, dan Vero cell line in MTT assay. However, bacterial extract with code H2N have shown potentialcytotoxic compared to other extracts. As per the phytochemical study, this extract probably contained terpenoid group.Based on biochemical examination this bacterium, H2N, was identified as Bacillus sp.3.
RESUMEN
Fungi associated with marine sponge Haliclona fascigera has shown a promising source in the search for new antimicrobial compounds. We have isolated 25 endophytic fungi from the sponge, which were cultured in Sabouraud Dextrose Broth (SDB) for 4 weeks at 25-27ºC. The ethyl acetate extracts of the isolates-broth were then tested for its antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans by using agar diffusion method. The zone of inhibition was measured and expressed in millimeters. There were 8 isolates of the fungi that considered active to Staphylococcus aureus, i.e. HF2 isolate (14,5 mm), HF8 isolate (12,5 mm), HF9 isolate (14 mm), HF13 isolate (16,5 mm), HF14 isolate (11 mm), HF19 isolate (14,5 mm), HF21 isolate (14,5 mm), HF22 isolate (13 mm), and 1 isolate active to C. albicans, i.e. HF16 isolate (12,5 mm). The identification of the bioactive fungi isolates was done by comparing its macroscopic and microscopic characteristic based on literature. From the study, it can be concluded that fungi associated with marine sponge Haliclona fascigera possesses potentially antimicrobial activity which might be due to the presence of bioactive metabolite compounds.
RESUMEN
Marine endophytic bacteria are a valuable source of novel antibacterial in combating pathogenic isolates of methicillin-resistant Staphylococcus aureus (MRSA), a global nosocomial problem today. The aim of this study was to assess in vitro anti-MRSA activity of extracts from bacteria endophyte of marine sponge Haliclona fascigera collected from Setan Island, South Coast of West Sumatra, Indonesia. Anti-MRSA activity test carried out by the agar diffusion method using paper disk. The endophytic bacteria from sponge were isolated using dilution method and pour plate method on NA media. From the sponge were obtained 26 isolates of bacterial endophytic then propagated in NB media. The liquid media was then extracted using ethyl acetate solvent. Antimicrobial activity test carried out by the agar diffusion method using paper disk. The antibacterial activity assay was conducted with the extract concentrations of 5 %. Chloramphenicol was used as a positive control agent. The zone of inhibition was measured and expressed in millimeters. There were 12 isolates of the bacteria that considered active to MRSA. Mean of inhibition zones ranged from 11.1±0.17 to 15.17±0.76. Characterization and identification of endophytic bacteria were conducted to several bioactive bacteria. The identification method was performed using Gram staining and biochemical test.