Chemical and pharmacological properties of dry extract from black birch fungus

Ryzhova, G. L.; Kravtsova, S. S.; Matasova, S. A.; Gribel, N. V.; Pashinskii, V. G.; Dychko, K. A.

doi:10.1007/bf02464265

Cited by 13 publications

(12 citation statements)

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“…Heleno et al (2011) studied the contents of proteins, carbohydrates, fatty acids,sugars, vitamins and phenolic acids of six wild Boletus species and determined their antioxidant properties. The extract of Boletus scaber demonstrated antiulcer and antitumor activities and low acute toxicity (Ryzhova et al 1997). The methanol extracts from the fruiting body of the mushroom Boletus calopus showed free radical-scavenging activity (Kim et al 2006a).…”

Section: Introductionmentioning

confidence: 99%

Effect of different cooking methods on total phenolic contents and antioxidant activities of four Boletus mushrooms

2012

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The influences of cooking methods (steaming, pressure-cooking, microwaving, frying and boiling) on total phenolic contents and antioxidant activities of fruit body of Boletus mushrooms (B. aereus, B. badius, B. pinophilus and B. edulis) have been evaluated. The results showed that microwaving was better in retention of total phenolics than other cooking methods, while boiling significantly decreased the contents of total phenolics in samples under study. Effects of different cooking methods on phenolic acids profiles of Boletus mushrooms showed varieties with both the species of mushroom and the cooking method. Effects of cooking treatments on antioxidant activities of Boletus mushrooms were evaluated by in vitro assays of hydroxyl radical (OH·) -scavenging activity, reducing power and 1, 1-diphenyl-2-picrylhydrazyl radicals (DPPH·) -scavenging activity. Results indicated the changes of antioxidant activities of four Boletus mushrooms were different in five cooking methods. This study could provide some information to encourage food industry to recommend particular cooking methods.

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Section: Introductionmentioning

confidence: 99%

Effect of different cooking methods on total phenolic contents and antioxidant activities of four Boletus mushrooms

2012

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“…2007). The dry extract of Boletus scaber demonstrated antiulcer and antitumor activities and low acute toxicity (Ryzhova et al. 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Boletus mushrooms are valuable health foods, low in calories and lipids, and high in essential fatty acids, vegetable proteins, minerals and vitamins (Petrovska 1999;Bernas et al 2006;Liang et al 2007;Liu et al 2007). The dry extract of Boletus scaber demonstrated antiulcer and antitumor activities and low acute toxicity (Ryzhova et al 1997). The methanol extracts from the fruiting body of the mushroom Boletus calopus showed free radical-scavenging activity (Kim et al 2006).…”

Section: Introductionmentioning

confidence: 99%

LIPIDS AND FATTY ACIDS OF WILD EDIBLE MUSHROOMS OF THE GENUS BOLETUS

Hanŭs¹,

Shkrob²,

Dembitsky³

2008

Journal of Food Lipids

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Fifteen species of wild edible mushrooms belonging to the genus Boletus (phylum Basidiomycota) were examined by high‐performance thin‐layer chromatographic (HP‐TLC) analysis and gas chromatography–mass spectrometry (GC‐MS) analysis for the presence of neutral, glyco‐, phospholipids, betaine lipids and fatty acids. The most abundant fatty acids were oleic acid (9‐18:1, 15–42%), linoleic acid (9,12‐18:2, 38–58%) and palmitic acid (16:0, 7–17%), but a great variation of the ester composition from one to another one was found. A comparison of neutral lipids, glycolipids, polar lipids and fatty acid composition of four species was done. Diacylglyceryltrimethylhomoserine and phosphatidylcholine were found as major components among polar lipids. Chemical constituents were characterized by GC‐MS, HP‐TLC and other chemical methods. Biologic activity of some isolated compounds from the genus Boletus is also discussed. PRACTICAL APPLICATIONS Mushrooms are important wildlife food in the Mediterranean countries. The lipids of mushrooms, sampled from the Upper Galilee, Golan Heights and Mount Carmel areas, and also from the forest around Jerusalem, were examined. The benefits of including fatty acids in the diets of humans are well documented. Fatty acids play a major role in the functioning of the immune system and the maintenance of all hormonal systems in the body. Mushrooms from the genus Boletus are an excellent source of both fatty acids and neutral and polar lipids. Boletus mushrooms are one of the most popular treats in Israeli houses.

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“…The preparation Befungin produced from these fungi since 1955 normalized blood content of cholesterol and improved functions of the cardiovascular system [2,4] [4]. However, the mechanisms of this effects remain unclear.…”

Section: Abstract: Chaga; Bioglycans; Action Potential; Pacemakermentioning

confidence: 99%

Effects of bioglycans isolated from birch fungiinonotus obliquus on electric activity of venous sinus cells in frog heart

Golovko

1999

Bull Exp Biol Med

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Bioglycans isolated from chaga in a concentration of 0.0001% reduced frequency of action potential in venous sinus cells of frog heart during the first 15-30 rain of exposure, then this parameter increased by 10% per hour over 3.5 h, and was 41+3 min -1 from the 4th to the 20th hour of incubation. The frequency of action potentials in heart strips in the chaga extract was 40% higher than in Ringer's solution. The effect of chaga bioglycan is probably associated with adsorption on myocyte membranes. Binding of Ca 2+ to bioglycans observed during the first 30 min inhibited effiux of intracellular Ca 2+. Key Words: chaga; bioglycans; action potential; pacemakerChaga (birch fungi Inonotus obliquus) are used in Russian medicine for centuries. The preparation Befungin produced from these fungi since 1955 normalized blood content of cholesterol and improved functions of the cardiovascular system [2,4] [4]. However, the mechanisms of this effects remain unclear.Here we studied the effects of chaga bioglycans on spontaneous rhythmic activity and membrane potentials of venous sinus cells of frog heart. MATERIALS AND METHODSExperiments were performed on sinoatrial strips isolated from grass frogs Rana temporaria (n=27) in February-March. After destruction of the spinal cord, the animals were decapitated, and the heart was immediately removed. Two preparations from the right and left parts of the sinoatrial ring were produced. The effects of 24-h incubation with bioglycan were studied on the right part. The left part was incubated in control Ringer's solution containing (in raM) 112 NaC1, 1.9 KC1, 0.9 CaC12, and 2.4 NaHCO 3 (pH 7.5-7.7 was Laboratory of Physiological Researches, Department of Biotechnology and Molecular Immunology, Institute of Physiology, Komi Research Center, Ural Division of the Russian Academy of Sciences, Syktyvkar maintained by aeration with air and Tris-maleate-NaOH buffer). The preparations were perfused at 2 I+2~ Chaga fungi were gathered in Syktyvkar environs in August. Air-dried raw materials were preliminary treated with methanol and chloroform to remove lowmolecular-weight admixtures. Bioglycan precipitate was obtained after 5-h extraction with hot distilled water (70~ followed by ethanol precipitation [3]. Bioglycans were isolated by centrifugation, dissolved in water, dialyzed, and lyophilized (total yield 1.6%). Glucose was assayed after hydrolysis with 2 M trifluoroacetic acid at 100~ for 3 h [3]. Bioglycan was added to standard Ringer's solution to a concentration of 0.0001%.Action potentials (AP) were recorded intracellularly with glass microelectrodes (initial resistance no less than 40 M~) and imputed into a C1-114"1 oscilloscope coupled with an H-3030 automatic recorder. The results were statistically analyzed and presented as mean• error. The differences were significant at p<0.05 [1].

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Chemical and pharmacological properties of dry extract from black birch fungus

Cited by 13 publications

References 1 publication

Effect of different cooking methods on total phenolic contents and antioxidant activities of four Boletus mushrooms

Effect of different cooking methods on total phenolic contents and antioxidant activities of four Boletus mushrooms

LIPIDS AND FATTY ACIDS OF WILD EDIBLE MUSHROOMS OF THE GENUS BOLETUS

Effects of bioglycans isolated from birch fungiinonotus obliquus on electric activity of venous sinus cells in frog heart

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