Aqueous-soluble components of sporoderm-removed Ganoderma lucidum spore powder promote ferroptosis in oral squamous cell carcinoma

Objective: Ferroptosis is a novel cell death process which displays a promising role in cancer treatment.However, clinically available drugs targeting ferroptosis are rarely used, and yet there are no studies reporting on inducing ferroptosis via Chinese herbal extracts. Here we explored the tumor inhibition effects of Ganoderma lucidum(G. lucidum) on oral squamous cell carcinoma(OSCC). Specifically, we aimed to clarify the biological mechanism of components in the dietary, aqueous-soluble sporoderm-removed G. lucidum spore powder(A-GSP).Methods: Preliminary transcriptome analysis revealed the significant enrichment of the ferroptosis pathway.Cellular Fe2+, glutathione(GSH), malondialdehyde(MDA), reactive oxygen species(ROS) and lipid peroxide levels were measured to identify ferroptosis occurrence. Western blotting was used to measure ferroptosis-related proteins. Changes in mitochondria morphology and function were observed with transmission electron microscopy(TEM) and ATP detection assays. Ferroptosis inhibitor ferrostatin-1 was then used to verify the anti-tumor effects of A-GSP. Finally, nude mice xenograft models of oral cancer confirmed that A-GSP inhibited tumor growth.Results: A-GSP promoted ferroptosis in oral cancer cells by inducing Fe2+influx, GSH depletion, as well as lipid peroxide and ROS accumulation. Ferroptosis-related proteins exhibited corresponding changes, particularly Acylco A synthetase long chain family member 4(ACSL4) increase and glutathione peroxidase 4(GPX4) decrease. A-GSP considerably lowered mitochondrial volume and ridge number, while significantly decreasing ATP production. Ferrostatin-1 reversed all of these A-GSP-induced changes. In vivo, A-GSP exerted a ferroptosismediated tumor-suppressing effect without observable adverse reactions.Conclusions: Our findings demonstrate the therapeutic potential of A-GSP for treating patients with OSCC by targeting ferroptosis.

Ganoderma lucidum spore powder modulates Bcl-2 and Bax expression in the hippocampus and cerebral cortex,and improves learning and memory in pentylenetetrazole-kindled rats

We studied the effects of Ganoderma lucidum spore powder on Bax and Bcl-2 expression and neuronal apoptosis in pentylenetetrazole-kindled epileptic rats. Sixty adult rats were randomly divided into a control group, an epileptic group （kindled） and three medication groups （150,300 450 mg/kg given to kindled rats）. Bax and Bcl-2 immunohistochemistry and TUNEL labeling showed that the number of Bax- and TUNEL-positive cells in the hippocampus and cerebral cortex decreased significantly in the high-dose medication group, while the number of Bcl-2 immunoreactive cells increased. The Morris water maze test showed that high-dose treatment significantly shortened escape latency and increased spatial probe trial performance. Our findings indicate that a high dose of Ganoderma lucidum spore powder upregulates the expression of antiapoptotic Bcl-2 protein in the hippocampus and cerebral cortex, inhibits proapoptotic Bax expression, and decreases seizure-induced neuronal apoptosis. Further, Ganoderma lucidum appears to protect against epilepsy-related learning and memory impairments.

Effects of Ganoderma lucidum spore powder on astrocyte expression and glutamine synthetase activity in the hippocampal region of epileptic rats

BACKGROUND： Recent studies have demonstrated that astrocyte dysfunction plays a central role in inhibiting epileptic seizures and that regulation of astrocyte function may be a new target for treatment of epilepsy. OBJECTIVE： To observe the effects of Ganoderma lucidum spore powder （GLSP） on astrocyte morphology and glutamine synthetase （COS） activity in the hippocampal region of epileptic rats. DESIGN, TIME AND SETTING： A randomized, controlled animal experiment was performed at the Function Laboratory, College of Basic Medicine, Jiamusi University between October and December 2006. MATERIALS： A total of 30 Sprague Dawley （SD） rats were randomized to three groups （n = 10）： control, model, and GLSP. GLSP was sourced from Jiamusi Wild Ganoderma Lucidum Planting Base and prepared to 30 g/L with physiological saline before use. Pentylenetetrazol （PTZ） （10 g/L） was provided by Sigma Company, USA. METHODS： The control group received intraperitoneal （i.p.） and intragastric （i.g.） physiological saline. Following epilepsy induction by i.p. administration of PTZ （35 mg/kg）, rats from the mode/and GLSP groups were ig injected with physiological saline and GLSP （300 mg/kg）, respectively. Each compound was administered once per day, for a total of 28 successive days. Epileptic seizure convulsions were graded 0-5. A higher grade indicated more severe epilepsy. Only those rats showing stage 2 or higher convulsions at least 5 times successively were included in further experiments. MAIN OUTCOME MEASURES： Immediately alter injection, seizure activity was monitored for 30 minutes to determine the latent period and seizure duration; simultaneously, astrocyte numbers and GS activity in the hippocampal region of rats with epilepsy were detected by immunohistochemistry. RESULTS： All 30 rats were included in the final analysis. On day 28, following PTZ administration epileptic seizures were not found in the control group. In the GLSP group, rats exhibited rhythmic head nodding or facial spasms, and the latent period was significantly longer than that of the model group （P 〈 0.05）. In the model group, the majority of rats exhibited myoclonus or generalized convulsions, and epileptic seizure duration was slightly （but not significantly） longer than that in the GLSP group （P 〉 0.05）. Within 2-3 minutes of PTZ injection, the model group exhibited grade 4 or 5 epileptic seizures, and the GLSP group mostly showed grade 2 or 3, and occasionally grade 4 or 5, epileptic seizures. All rats recovered within 30 minutes. The model group exhibited significantly increased astrocytes （P 〈 0.05）, with thicker cellular processes and a higher number of cellular processes, and significantly decreased GS activity （P 〈 0.05） tban the control group. The astrocyte count was significantly decreased but GS activity was significantly increased in the GLSP group when compared with the model group （P 〈 0.05）; however, astrocyte appearance was similar in both groups （P 〈 0.05）. CONCLUSION： GLSP can effectively inhibit astrocyte numbers and elevate GS activity in the hippocampal region of rats with epilepsy, thereby reducing epileptic seizures.

Study on Key Techniques for High-quality and High-yield Cultivation of Ganoderma lucidum Spore Powder

Comparative test of 4 Ganoderma lucidum varieties from different sources showed that the mycelium of Chizhi 1 grew fast with thick and dense hyphae,round and solid cap,and high spore powder yield.Chizhi 1 was proved to be an excellent variety because of its strong resistance and high spore powder yield.Different cultivation materials were chosen and combined to form 3 cultivation formulations.The results showed that Formulation(3),in which basswood was soaked in nutrient solution for 24 h,presented fast mycelial growth and high spore powder output,and therefore was proved to be a high-yield formulation of Ganoderma lucidum spore powder.

Effect of Ganoderma lucidum spore on expression of insulin-like growth factor-1, nuclear factor-kappa B, and neuronal apoptosis in the epileptic rat brain

BACKGROUND：It has been reported that Ganoderma lucidum spore powder, a very well known Chinese traditional medicine, can affect immunoregulation, free radical scavenging, and anti-hypoxia responses. OBJECTIVE： To investigate the effect of Ganoderma lucidum spore powder on expression of insulin-like growth factor-1 （IGF-1）, nuclear factor-κB （NF-κB） and neuronal apoptosis in rats with pentylenetetrazol （PTZ）-induced epilepsy. DESIGN, TIME AND SETTING： A cellular and molecular biology experiment with randomized controlled study design was performed at the Central Laboratory of Basic Medical College of Jiamusi University from June to August 2005. MATERIALS： Thirty healthy, adult, male, Wistar rats were selected and randomly divided into 3 groups （10 rats per group）： control, epilepsy model, and Ganoderma lucidum spore powder. A sub-eclampsia PTZ dose （35 mg/kg） was intraperitoneally injected to induce epilepsy in the latter two groups. Wild Ganoderma lucidum spore powder （30 g/L） was provided by the wild Ganoderma lucidum plant nursery at Jiamusi, China. Immunohistochemical detection and terminal deoxynucleotidyl transferase-mediate dUTP nick end-labeling （TUNEL） kits were purchased from Wuhan Boster Biological Technology Co., Ltd., China. METHODS： Ganoderma lucidum spore powder was intragastrically administered at a dose of 10.0 mL/kg, once a day for 28 days. In the epilepsy and control groups, an equivalent volume of normal saline was intragastrically administered. MAIN OUTCOME MEASURES： Immunoreactivity for IGF-1 and NF-κB/P65 were detected by immunohistochemical staining. Neuronal apoptosis was detected using TUNEL methods. RESULTS： The hippocampus and cerebral cortex of rats with PTZ-induced epilepsy exhibited a higher number of apoptotic cells at high magnification （×400）, compared with the control group. Expression of IGF-1 and NF-κB were higher in the epilepsy group, compared with the control group （P 〈 0.01）. In Ganoderma lucidum spore-treated rats, fewer apoptotic cells were observed in the hippocampus and cerebral cortex, expression of NF-κB/P65 was lower, and immunoreactivity to IGF-1 increased more distinctly, compared with the epilepsy group. In addition, seizure latency was longer on 17, 21, and 25 days post-PTZ treatment in the Ganoderma lucidum spore powder group, compared with the epilepsy group （P 〈 0.05-0.01）. CONCLUSION： Ganoderma lucidum spore powder down-regulated expression of NF-κB in brain tissues of rats with PTZ-induced epilepsy, increased immunoreactivity to IGF-1, and inhibited neuronal apoptosis. These results indicated that Ganoderma lucidum spore powder has a neuroprotective effect.

破壁灵芝孢子粉中多种重金属元素及硒含量检测方法探讨

采用微波消解进行前处理,三重四极杆-电感耦合等离子体质谱法测定破壁灵芝孢子粉中镉、铬、镍、砷、铅、汞及硒元素含量,对方法条件进行优化和讨论,并对20批次破壁灵芝孢子粉进行测定。结果表明,镉、铬、镍、砷、铅和汞元素在氦气碰撞模式,硒元素在氧气反应模式下,采用内标校正定量,可达到良好的测定效果。在优化的条件下,各元素线性关系良好,检出限均可达μg·kg^(-1)级别;镉、铬、镍、砷、铅及硒元素的加标回收率在90.3%~105.0%,汞的加标回收率在82.1%~92.5%;方法精密度在5%以内。此方法前处理操作简便,检测灵敏度高,稳定性好,给灵芝孢子粉多元素测定提供了良好的技术支撑。

灵芝孢子粉咀嚼片的研发与制作

以灵芝孢子粉为原料,研制灵芝孢子粉咀嚼片。通过配方优化试验和感官品质评价分析,得出最佳配方组合为灵芝孢子粉14.4%、低聚果糖34.0%、全脂奶粉51.6%。按照此配方制作的灵芝孢子粉咀嚼片口感和形状俱佳,硬度和脆碎度均符合标准,入口易崩解,且无杂质产生。

酶法提取灵芝孢子粉胞壁水溶性糖的工艺优化及分子量分布

为提高灵芝(Ganoderma lucidum)孢子粉胞壁水溶性糖的提取效率,以灵芝孢子粉胞壁残渣为研究对象,用单因素实验、响应面实验优化酶法胞壁水溶性糖提取工艺,并比较酶法和不同物理法处理的灵芝孢子粉胞壁水溶性糖的分子量分布。结果表明:最佳提取工艺为溶壁酶加量2%,酶解时间5 h,料液比1︰10(g︰m L)、温度40℃、pH6.5,在此条件下提取的灵芝孢子粉胞壁水溶性糖含量达到17.86%。分子量分布分析结果表明,酶解后的水溶性糖以低聚糖为主。研究结果可为有效利用和开发灵芝孢子粉提供参考。

灵芝孢子粉复合饮料的加工工艺研究

为丰富功能性饮料市场,以灵芝孢子粉为原料制备一款功能性饮料,以灵芝孢子粉浸提液添加量、山楂枸杞浸提液添加量、甘草浸提液添加量、木糖醇添加量为考查因素进行单因素试验,采取正交试验筛选出最优工艺。结果表明,灵芝孢子粉浸提液添加量为10%,山楂枸杞浸提液添加量为7.5%,甘草浸提液添加量为2.5%,木糖醇添加量为14%时,感官评分最高。此时产品呈浅褐色,有灵芝孢子粉特有的气味与口感,澄清透明,无杂质沉淀,酸甜协调。

灵芝孢子粉药渣多糖超声提取工艺优化及抗氧化活性研究

目的:优化灵芝孢子粉药渣中的多糖提取工艺并研究体外抗氧化活性。方法:采用Box-Behnken试验设计,深入探讨液固比、提取时间及提取温度三个关键参数对多糖提取率的具体作用,确定最佳的提取条件,以优化多糖的提取效率;并对灵芝孢子粉药渣多糖进行体外抗氧化活性研究。结果:灵芝孢子粉药渣多糖的最佳提取工艺为:超声波功率300 W、液固比为120∶1(mL∶g)、提取时间30 min、提取温度65℃。在此提取条件下灵芝孢子粉药渣中多糖提取率达到了6.31%;过氧化氢诱导建立氧化应激细胞模型的实验表明,有一定的抗氧化能力。结论:在灵芝孢子粉药渣的提取过程中,采用超声提取法能有效且充分地释放其中的多糖成分。这些多糖在实验中提升了谷胱甘肽过氧化物酶、超氧化物歧化酶以及过氧化氢酶的活性。此外,它们还积极促进了谷胱甘肽的含量增长,进一步证实了其生物活性的多样性。尤为重要的是,多糖的提取和应用在降低丙二醛含量方面表现出色,为相关领域的研究和应用提供了新的可能性,从而展现了其独特的生物学效应和广泛的应用前景。

不同干燥方式对灵芝孢子粉中灵芝孢子油过氧化值的影响

目的:比较不同干燥方式对灵芝孢子粉中灵芝孢子油过氧化值的影响。方法:以西藏灵芝孢子粉为例,采用不同的干燥方式将灵芝孢子粉干燥至合格,然后进行破壁,用超临界CO_(2)萃取法提取灵芝孢子油,检测灵芝孢子油的过氧化值,并比较不同干燥方式对灵芝孢子油的过氧化值的影响。结果:微波干燥和真空干燥方式得到的灵芝孢子油过氧化值均合格,分别为0.13%,0.14%;热风干燥和晾晒干燥方式得到的灵芝孢子油过氧化值不合格,分别为0.16%、0.17%。结论:水分变化率可能是灵芝孢子粉干燥过程中的重要影响因素,微波干燥方式水分变化率远高于其他方式,干燥效率高,耗能少,且不影响孢子油过氧化值,适合干燥大规模样品;其它干燥方式相对比较费时耗能,且灵芝孢子粉存在变质的风险。

分光光度法测定破壁灵芝孢子粉中总三萜含量研究

目的:优化分光光度法测定破壁灵芝孢子粉中总三萜含量的分析方法。方法:分别针对方法中提取液除杂方式、挥干方式及水浴反应条件等进行优化,并对优化后的方法线性、检出限、定量限、准确性、专属性及重复性等进行验证。结果:测试方法中挥干方式为沸水浴挥干、除杂方式为4000 r·min^(-1)离心10 min、水浴条件为60℃反应15 min;熊果酸标准溶液在20~160μg范围内线性良好,相关系数R2为0.9992,加标回收率在93.12%~97.73%,相对标准偏差低于0.64%,方法检出限为0.1203μg·mL^(-1),定量限为0.3610μg·mL^(-1)。结论:该方法操作简便,条件明确,具有良好的准确度和精密度,适用于破壁灵芝孢子粉中总三萜含量测定。

灵芝孢子粉提质扩能生产及质量控制研究

为了能够保证灵芝孢子粉产品产量和质量,通过灵芝孢子粉精深加工提质扩能的建设和生产破壁灵芝孢子粉的质量控制,利用质量检测体系对灵芝孢子粉的理化指标进行了3批次的随机抽检分析,结果发现:提质扩能建设改善了生产车间、空气净化系统、净化水处理设备、保鲜冷库、外部参观通道窗口硬件设施,提升了低温灵芝孢子破壁、胶囊填充、自动装粉技术,使灵芝孢子粉产品的生产流程规范化标准化,灵芝孢子粉产品的理化检测指标均符合《破壁灵芝孢子粉质量标准》。

丽产特色中药材及饮片中33种禁用农药残留分析

建立超高效液相色谱-串联质谱(UPLC-MS/MS)法和气相色谱-串联质谱(GC-MS/MS)法评价丽产特色中药材及饮片中33种禁用农药残留情况。用乙腈高速匀浆提取低温浓缩,并结合亲水亲油平衡材料固相萃取柱净化。结果表明,33种禁用农药线性良好,相关系数均大于0.990,加标回收率为75.7%~119.7%,RSD为2.6%~9.8%。160批丽产特色中药材及饮片中有8批检出禁用农药(检出率为5%),其中1批样品超出限度(不合格率为1%),禁用农药残留情况整体良好,需重点关注灵芝孢子粉中硫丹残留。

不同品种灵芝子实体及孢子粉元素成分分析及重金属安全性评价

针对我国鲁西地区主栽灵芝品种,利用电感耦合等离子体质谱法(ICP-MS)测定不同品种灵芝子实体、孢子粉及破壁孢子粉中元素及重金属含量,开展元素成分分析及重金属安全性评价。元素成分分析结果表明,藏芝和香血芝子实体中大部分元素含量明显高于赤芝、美芝和新大片子实体中元素含量,特别是Fe、Cu、Zn、Mn、Se、B、V、Co、Sr 9种人体必需微量元素,其中藏芝子实体中Fe元素含量达到234 mg/kg、Zn元素含量达到57.9 mg/kg、Se含量达到0.309 mg/kg,香血芝子实体样品Sr元素含量最高,达到3.60 mg/kg。赤芝粉和赤芝椴木粉元素营养质量高于美芝粉和新大片孢子粉元素营养质量,赤芝粉和赤芝椴木粉中硒含量分别是美芝粉中硒含量的3倍和2倍。重金属安全性分析结果表明5种灵芝子实体与4种孢子粉样品Pb、Hg 2种重金属含量远低于相关标准,安全性较高,藏芝及香血芝子实体、新大片孢子粉样品As元素含量较高,具有一定的安全性风险。破壁技术会造成孢子粉中As、Pb、Cd、Cr、Cu、Ni金属元素含量不同程度的提高,孢子粉破壁过程中重金属存在一定的安全风险。

适合孢子粉高产的赤灵芝栽培配方筛选

为充分利用湛江市本地甘蔗渣、桑屑枝条、土沉香渣等秸秆资源,降低赤灵芝生产对木材原料的依赖,通过研究3个配方菌丝生长速度、子实体和孢子粉产量、品质(多糖、三萜)、抗氧化活性等,筛选出适合本地的优良赤灵芝栽培配方。结果显示,添加了甘蔗渣的配方2,菌丝生长速度最快(0.75 cm·d^(-1)),孢子粉产量最高(14.45 g/袋),且多糖和三萜总含量也高于其他2个配方。添加土沉香渣的配方3,菌盖直径(7.55 cm)、子实体鲜质量(36.79 g/袋)、总产量最高,但多糖和三萜总含量不如其他2个配方。添加了桑屑的配方1,赤灵芝的总抗氧化活性稍高于其他2个配方,但无显著差异。3个配方下子实体的三萜含量高于孢子粉,而孢子粉的多糖含量高于子实体。综合分析,配方2是实现梅灵3号灵芝孢子粉高产的较优栽培配方,适合在当地推广应用。

大孔树脂纯化灵芝子实体和孢子粉中总三萜

研究比较大孔树脂对灵芝子实体和孢子粉两个不同部位中总三萜的吸附特性,优选其对灵芝总三萜的分离纯化工艺条件。采用紫外分光光度法测定灵芝子实体和孢子粉两个不同部位中总三萜的含量,选择8种大孔树脂,以总三萜吸附率和解吸率为指标,筛选最佳树脂型号,并考察最佳树脂纯化灵芝子实体和孢子粉中总三萜的工艺参数。结果表明:8种大孔树脂中,HPD-500型大孔树脂对灵芝子实体总三萜的吸附解吸效果最好,最佳纯化工艺条件为上样液浓度1.0 g干样/mL,最大上样量2 BV,用8.5 BV的75%乙醇进行洗脱,该工艺下灵芝子实体总三萜纯度达60.59%;而AB-8型大孔树脂对灵芝孢子粉总三萜的吸附解吸效果最好,且最佳纯化工艺条件为上样液浓度0.4 g干样/mL,最大上样量3 BV,用8.5 BV的95%乙醇进行洗脱,该工艺下灵芝孢子粉总三萜纯度达65.48%。综上,HPD-500型和AB-8型大孔树脂分别富集纯化灵芝子实体和灵芝孢子粉中总三萜的工艺效果显著,简单可行,为灵芝三萜的深入探究和工业化纯化灵芝子实体和孢子粉总三萜提供理论依据。

灵芝孢子粉脂质成分HPLC-ELSD指纹图谱构建及含量测定

以16批(S1~S16)不同来源的灵芝(Ganoderma lucidum)孢子粉为材料,构建灵芝孢子粉脂质成分高效液相色谱-蒸发光散射检测(HPLC-ELSD)指纹图谱,将S1~S16的HPLC-ELSD指纹图谱数据导入中药色谱指纹图谱相似度评价系统(2012版),指认共有峰和评价相似度,采用HPLC-ELSD测定S1~S16中亚油酸、棕榈酸、油酸和麦角甾醇含量。结果表明:共指认4个共有峰,分别为亚油酸、棕榈酸、油酸和麦角甾醇;除S14外,其他15批灵芝孢子粉中脂质成分HPLC-ELSD指纹图谱相似度高,较为稳定;不同来源的灵芝孢子粉中亚油酸、棕榈酸和油酸的含量差异较大,麦角甾醇含量较为稳定。

灵芝破壁孢子粉中粗多糖含量测定的不确定度评估及控制

为明确用于食用菌粗多糖含量测定的苯酚-硫酸分光光度法中对结果可靠性的影响因素,根据标准NY∕T 1676—2008中的方法对一个灵芝破壁孢子粉样品的粗多糖进行测定,分析该方法在测定过程中的不确定度来源,计算各分量的不确定度和合成不确定度,并对各分量不确定度对合成不确定度的贡献大小进行排名。结果表明:灵芝破壁孢子粉样品的粗多糖含量为2.71%±0.09%(k=2),影响不确定度的主要来源是标准品溶液配制和稀释、标准曲线拟合、样品重复性。增加标准工作溶液的配制量可有效降低苯酚-硫酸分光光度法的不确定度,并能提高其可靠性。

响应面法提取优化破壁灵芝孢子粉多糖及其分级醇沉组分的抗氧化活性研究

目的:对破壁灵芝孢子粉多糖(BGP)的最佳提取工艺、各分级醇沉多糖组分的抗氧化性进行探究。方法:以破壁灵芝孢子粉为原料,采用内部沸腾法探究提取温度、提取时间、料液比对BGP得率的影响;利用响应面法分析优化BGP的提取参数。用不同浓度的乙醇醇沉多糖,通过测定其DPPH自由基以及羟自由基的清除力,测定其抗氧化性。结果:根据回归模型分析预测结果,最佳提取工艺参数为提取温度83℃、提取时间7 min、料液比1:21。在此条件下BGP的得率为9.10%。以不同浓度的乙醇分级醇沉BGP,得到5种醇沉BGP组分。乙醇浓度为90%时,所得BGP的得率最高。抗氧化实验表明各醇沉BGP都具有一定的抗氧化活性。90%-BGP的抗氧化性稍强于其他醇沉多糖,并且随着多糖浓度的增加,各醇沉多糖的抗氧化性均有一定的增加的趋势。结论:利用最佳提取参数提取,不同乙醇浓度醇沉的BGP均具有一定的抗氧化活性。