Isolation and Structural Determination of a Glucan from the Spores of Ganoderma lucidum

A water soluble, (1 -->6)-branched, (1 -->4) linked D-glucan (LB-B1), [alpha](D)(21) = +174.2 degrees (c 0.87, H2O), was obtained from a hot-water extract of the sporoderm-broken spores of Ganoderma lucidun (Fr.) Karst by HPSEC, with 0.001 mol/L sodium hydroxide as the eluant, the molecular weight (Mw) of LB-B1 was estimated to be 9.3 x 10(3). From the results of total hydrolysis, methylation analysis, acetolysis and 1D, 2D-NMR experimentation, it was concluded that LB-B1 was composed of repeating units with the following structure: alpha -D-Glc(p)-(1 -->6)-alpha -D-Glc(p)-(1 -->6)-alpha -D-Glc(p) 1 down arrow 6 (-->4)-alpha -D-Glc(p)-(1 -->4)-alpha -D-Glc(p)-(1 -->4)-alpha -D-Glc(p)-(1 -->4)-alpha -D-Glc(p)-(1 -->4-)-alpha -D-Glc(p)-(1 -->)(n)

Breaking and Characteristics of Ganoderma Lucidum Spores by High Speed Entrifugai Shearing Pulverizer

The spores of Ganoderma lucidum were ground and broken to ultrafine particles by high speed centrifugal shearing（HSCS） pulverizer. The characteristics of Ganoderma lucidum spores were analyzed by scanning electron microscope （SEM）, Fourier transform infrared spectrophotometry （FTIR）. Ultraviolet-visible pectrophotometer was used to determine the extraction ratio of aqueous solubility polysaccharide between the raw and broken spores. The immunological function on the mice before and after the breaking of spores wan investigated. The experimental results show that after being ground, the sporoderm-broken ratio reachs 100%, the original active ingredients of ganoderma lucidum spores do not change, and the extraction ratio of aqueous solubility polysaccharide is greatly increased by 40.08%. The broken spores show much higher immunological activity comparing with original spores of Ganoderma lucidum.

灵芝破壁孢子粉的抗肿瘤活性研究

目的研究灵芝破壁孢子粉对乳腺癌和口腔癌生长的抑制作用。方法采用灵芝破壁孢子粉乙醇提取物处理乳腺癌MCF-7细胞、口腔癌KB细胞和宫颈癌HeLa细胞,检测三种细胞的增殖情况。构建裸鼠乳腺癌MCF-7移植瘤和口腔癌KB移植瘤模型,评价灵芝破壁孢子粉进行灌胃治疗后的肿瘤生长抑制情况。结果灵芝破壁孢子粉乙醇提取物显著抑制MCF-7、KB和HeLa细胞的增殖,且该抑制效应呈剂量依赖性。在MCF-7移植瘤模型中,低、中、高3组灵芝破壁孢子粉给药剂量均有显著的肿瘤生长抑制作用,肿瘤抑制率分别为50.35%、65.72%和80.55%;但在KB移植瘤模型中,低剂量组没有显示显著的肿瘤生长抑制作用,而中剂量组和高剂量组表现出明显的抗肿瘤作用,3组肿瘤抑制率分别为4.03%、37.63%和40.59%。结论灵芝破壁孢子粉能够抑制MCF-7乳腺癌和KB口腔癌荷瘤裸鼠肿瘤的生长。

超临界CO_2萃取灵芝孢子油的工艺研究

主要研究超临界CO2萃取灵芝孢子油过程中,萃取压力、萃取温度、萃取时间、CO2流量等因素对萃取率的影响。试验结果表明,最佳的萃取条件为萃取压力14 MPa,萃取温度34℃,分离压力(5.5±0.2)MPa,分离温度32℃,CO2流量25 L.h-1,萃取时间270 min。在此最佳萃取工艺条件下,萃取率最高为34.41%,灵芝孢子油成金黄色半透明,质量较好,而且放置于4℃下不易冻结。