Abstract:
Fungi in the family Xylariaceae are common wood decay fungi. Xylaria has been shown to be potential source of natural products for exploitation in medicine, agriculture, and industry. They produce many secondary metabolites with very useful biological activities. In this study, metabolites of Xylaria spp. from Trad Agroforestry Research and Training Station were isolated from EtOAc extracts of the culture broths, methanol extract of mycelium grown in malt extract broth. The crude extracts were tested for antimicrobial activity against tested microorganisms such as Staphylococcus aureus ATCC6538-P, Bacillus subtilis ATCC6633, Pseudomonas aeruginosa ATCC9027, Escherichia coli ATCC8739 and Candida albicans ATCC 10231. The results showed that the extracted crude extracts from culture broths against microorganisms better than crude extracts from mycelium. Moreover, nine crude extracts with strong antimicrobial activity were tested for cytotoxicity against 4 cancer cell lines such as CaSki (Human papilloma virus positive cervical cancer cell line), SiHa (Human papillomavirus type 16 (HPV16) positive cervical cancer cells), A375 (Human malignant melanoma) and Jurkat (Human acute T-cell leukemia). Only crude extract from isolate TR 30 showed the specific efficiency of cytotoxicity against CaSki cell line with IC50 value of 10.01±1.57 µg/ml. In addition, morphology, cultural characteristics and ITS (internal transcribe spacer) sequencing analysis of isolate TR30 confirmed that it is belongs to Xylaria badia. Purification of bioactive compounds from this extract was carried out by chromatography and one pure compound was obtained that was identified as 4-carboxy-7-hydroxy-3-(1-hydroxyethyl)-3H-isobenzofuran-1-one