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Title of Journal: World J Microbiol Biotechnol

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Abbravation: World Journal of Microbiology and Biotechnology

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Springer Netherlands

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10.1007/s11164-015-1962-0

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1573-0972

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Emphasis Type="Italic"Aureobasidium pullulans/E

Authors: Pennapa Manitchotpisit Ramida Watanapoksin Neil P J Price Kenneth M Bischoff Malatee Tayeh Sudarat Teeraworawit Saranya Kriwong Timothy D Leathers
Publish Date: 2014/03/22
Volume: 30, Issue: 8, Pages: 2199-2204
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Abstract

Liamocins are structurally unique heavierthanwater “oils” produced by certain strains of Aureobasidium pullulans The aim of the current study is to identify new sources of liamocins and evaluate their potential as anticancer agents Nine strains of A pullulans from phylogenetic clades 8 9 and 11 were examined for the first time for production of liamocins Strains in these clades have only been isolated from tropical environments and all strains tested here were from various locations in Thailand Strains RSU 9 RSU 21 and RSU 29 all from clade 11 produced from 70 to 86 g liamocins/l from medium containing 5  sucrose These are the highest yields of liamocins that we have found thus far These strains also produced from 94 to 17 g pullulan/l The structural identity of liamocins was confirmed by matrixassisted laser desorption/ionization mass spectrometry differential spectra were obtained in which the dominant ion was either at about m/z 8055 or m/z 9496 consistent with the structure of liamocins Liamocins from A pullulans strains RSU 9 and RSU 21 inhibited two human breast cancer cell lines and a human cervical cancer cell line IC50 values of 322 ± 14 to 631 ± 24 μg liamocins/ml but were not toxic to a normal cell line Liamocins weakly inhibited a strain of Enterococcus faecalis but did not inhibit strains of Lactobacillus fermentum Staphylococcus aureus Escherichia coli and Pseudomonas aeruginosa Thus A pullulans phylogenetic clade 11 is a promising source of liamocins and these compounds merit further examination as potential anticancer agentsMention of any trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the US Department of Agriculture USDA is an equal opportunity provider and employer

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