title: Isolation of beta-glucan from the cell wall of Saccharomyces cerevisiae.
abstract: Beta-glucan, one of the major cell wall components of Saccharomyces cerevisiae (S. cerevisiae), has been found to enhance immune functions. At present study, we developed an optimal procedure to extract and purify beta-glucan. At first, yeast cells were grown in sabouraud dextrose agar and then cultured in yeast extract-peptone-glucose (YPG) broth. After incubation, cells were harvested, washed and disrupted by means of sonication method. The obtained cell walls were used to prepare alkali-soluble beta-glucan (glucan-S1). In this regard, 2% sodium hydroxide (NaOH) and 3% acetic acid were used in alkaline-acid extraction, respectively. This preparation contained 2.4% protein. In the next step, DEAE sephacel chromatography was used to remove remaining proteins (glucan-S2). Subsequently this preparation was applied into concanavalin-A sepharose column to remove manann. Finally, beta-glucan free of mannoprotein complexes was prepared (glucan-S3).
authors.affiliation: Mycology Research Center, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
authors.forename: Hojjatollah
authors.initials: H
authors.lastname: Shokri
authors.forename: Farzad
authors.initials: F
authors.lastname: Asadi
authors.forename: Ali Reza
authors.initials: AR
authors.lastname: Khosravi
mesh_terms: D002473:Cell Wall / Q000737:chemistry; D002846:Chromatography, Affinity; D002852:Chromatography, Ion Exchange; D012441:Saccharomyces cerevisiae / Q000737:chemistry*; D047071:beta-Glucans / Q000302:isolation & purification*
chemical_list: D047071:beta-Glucans