Jayus
Dosen Fakultas Teknologi Pertanian, Universitas Jember, Jember, Indonesia
Nuriman
Dosen Fakultas Keguruan dan Ilmu Pendidikan, Universitas Jember, Jember, Indonesia
Sony Suwasono
Dosen Fakultas Teknologi Pertanian, Universitas Jember, Jember, Indonesia
DOI:
ABSTRACT
Extracellular epiglucan produced by Epicoccum nigrum has been examined by in vitro analysis to show its potency as an antitumor substance against leucemia cell. The aims of this study were to ditermine the LC50 value and prebiotic activities of native and derivated epiglucan. The epiglucan was modified by sulfation and carboxymethilation methods. The result showed that LC50 of native epiglucan occur at concentration of 22 g/ml. This substance was chemically modified through sulfation and charboxymethilation process in order to increase its antitumor activity. Based on the value of LC50, the sulfated and carboxymethylated epiglucan have higher activity against leucemia cell compare to that of unmodified epiglucan. The LC50 value of sulfated epiglucan is 14 μg/L, while the carboxymethylated one is 13 μg/L. Prebiotic activities of both sulfated and carboxymethylated epiglucan were also higher compare to the unmodified glucan since these two derivatives are able to elevate the growth rate of probiotic microorganism such as Lactobacillus casei, L. acidophilus and L. rhamnosus.
Keywords: antitumor, extracellular epiglucan, Epicoccum nigrum, charboxymethilation, sulfation
REFERENCES
Ambrose EJ, James AM, & Lowick LBH (1956). Differences between the electrical change carried by normal and homologous tumor cells. J. of E. Nature (177): 576-577.
Bao X, Liu C, Fang J, & Li X (2001). Structural and immunological studies of a major polysaccharide from spores of Ganoderma lucidum (fr.) KARST. J. of Carbohydrate Research (332): 67-74.
Bao X, Duan JC, Fang X, & Fang J (2001). Chemical modifications of the (13)--d-glukan from spores of Ganoderma lucidum and investigation of their physichochemical properties and immunological activity. J. of Carbohydrate Research (336): 127-140.
Hamuro J & Chihara G (1973). Effect of antitumor polysaccharides on the higher structure of serum protein. J. of Nature (245): 40-41.
Jin Y, Zhang H, Yin Y, & Nishinari K (2006). Comparison of curdlan and its carboxymethilated derivative by means of rheology, DSC, and AFM. J. of Carbohydrate Research (341): 90-99.
Liu JM, Haroun-Bouhedja F, & Boisson-Vidal C (2000). Analysis of the in vitro inhibition of mammary adenocarcinoma cell adhesion by sulfated polysaccharides. J. of Anti Cancer Research (20): 3265-3271.
Maeda YY, Chihara G, & Ishimura K (1974). Unique increase of serum protein and action antitumor polysaccharides. J. of Nature (252): 250-252.
Ramesh HP & Tharanathan RN (2003). Carbohydrates the renewable raw materials of high biotechnological value. J. of Critical Reviews in Biotechnology (23): 149-173.
Schmid F, Stone BA, McDougall BM, Bacic A, Martin KL, Brownlee, RTC, Chai E & Seviour RJ (2001). Structure of epiglucan, a highly side-chain/branched (13;16)--glucan from the micro fungus Epicoccum nigrum Ehrenb. Ex Schlecht. Carbohydrate Research (331): 163-171.
Smaali MI, Michaud N, Marzouki N, Legoy MD, & Maugard T (2004). Comparison of two β-glucosidases for the enzymatic synthesis of β-(1-6)-β-(1-3)-gluco-oligosaccharides. Biotechnology Letters (26): 675–679.
Wang Y& McNeil B (1995). pH effect on exopolysaccharide and oxalic acid production in cultures of Sclerotium glucanicum. J. of Enzyme and Microbial Technology (17): 124-130.
Wang Y, Zhang L, & Ruan D (2004). Preparation and structure of five derivatives of -(13)-d-glucan isolated from poria cocos sclerotium. J. of Polymer Science (22): 137-145.
Zhang P & Cheung PCK (2002). Evaluation of sulfated lentinus edodes -(13)-D-glucan as a potential antitumor agent. J. Biosience Biotechnology and Biochemistry (66): 1052-1056.