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1.
[Objective] To research on the inhibitory effects of polyphenols from Pinus koraiensis seed scale on the proliferation of human cancer cells in vitro. [Methods] Polyphenols from Pinus koraiensis seed scale were prepared into extracting solutions at different concentrations. Suspension cultures of five tumor cells were processed,which were lung carcinoma cell A549,human bone marrow neuroblastoma cell SH-SY5 Y,human skin cancer cell A375,human hepatocarcinoma cell HepG-2 and human ovarian cancer cell SKOV3. Inhibitory rate of cell proliferation in vitro was detected by MTT method. [Results] P. koraiensis polyphenols had relatively good inhibitory effects on A549,showing certain correlation with time or concentration. The inhibitory rare was the optimal when the concentration of P. koraiensis polyphenols was0. 4 mg / mL. Under this concentration,the inhibitory rate of extracting solution of P. koraiensis polyphenols reached 55% on lung carcinoma cell A549. P. koraiensis polyphenols showed no significant inhibitory effects on SH-SY5 Y,A375,HepG 2 or SKOV3. [Conclusions] P. koraiensis polyphenols had inhibitory effects on lung carcinoma cells.  相似文献   

2.
[Objective]To explore the identification methods of FRUCTUS AMOMI in different production areas,to detect the infrared absorption spectra of FRUCTUS AMOMI in different production areas by FTIR,to switch the spectra by derivative spectra; and to find out the characteristic difference absorption of FRUCTUS AMOMI in different production areas. [Results]There were no significant differences in the infrared spectra of FRUCTUS AMOMI in different production areas. Some characteristic peaks showed up in the wavelengths of 600- 750 and1 300- 1 400 cm- 1after the fourth-order derivave spectra. Peak differences appeared in eight samples in the wavelengths of 1 000- 1 300,1 400- 1 500,2 800- 3 000 and 3 500- 3 800 cm- 1. [Conclusions] There were significant differences in the FTIR spectra of FRUCTUS AMOMI in different production areas after processed by derivative spectra. This method could better identify the FRUCTUS AMOMI in different production areas.  相似文献   

3.
[Objective]To observe the protective effects and pathway of paeoniflorin on rat MID(multi-infarct dementia) model by establishing the improved MID model,and to lay the pharmacological basis for the development of protective neurons candidate compounds. [Methods]The classic rats' MID model was used to observe the protective effects and pathway of different dosages of paeoniflorin. The learning and memory abilities of rats were detected by Morris water maze. The expression of Bcl-2 and Bax protein were detected by immunohistochemistry.The changes of cerebral cortex and the neuron structure were detected by HE staining and electron microscopy. [Results]Paeoniflorin had significant improvement effects on the time of anesthetic awareness,detention time of inclined plate test,behavioral evaluation,cognitive impairment and brain neuron injury of rat MID model. The protective mechanism of paeoniflorin was related to the Bcl-2 and Bax expression in cerebral cortex and hippocampus brain tissue. [Conclusions]The paeoniflorin had significant improvement effects on the rat MID model. It restricted the EAA damage,intracellular calcium overload,and Bax expression,so as to promote the Bcl-2 expression and to restrict the cell apoptosis.  相似文献   

4.
不同品种梨汁中糖和有机酸含量测定及相关性分析   总被引：22，自引：0，他引：22  
利用反相高效液相色谱法测定了不同品种梨汁中的糖和有机酸含量,并应用SAS统计软件对各种糖和有机酸含量之间的相关性进行了分析。结果表明,梨汁中的糖主要为果糖、葡萄糖和蔗糖,其中果糖和葡萄糖含量较高;不同品种梨汁中果糖、葡萄糖及总可溶性糖含量变异较小,相对稳定,果糖与葡萄糖、总可溶性糖之间表现出显著的相关性;有机酸有苹果酸、柠檬酸、琥珀酸、莽草酸、酒石酸、奎宁酸、乳酸和富马酸,以苹果酸含量最高;不同品种梨汁中各有机酸含量差别较大,其中琥珀酸与乳酸、富马酸,莽草酸与柠檬酸、奎宁酸的含量之间表现出极显著的相关性。  相似文献   

5.
拟探讨热应激诱导LLC-PK1细胞线粒体凋亡相关因子的表达和活性情况,以及激活线粒体凋亡通路的时间。采用qRT-PCR方法和Caspase活性检测试剂盒分别检测42℃热应激处理后0,2,4,8,16 h以及37℃培养的LLC-PK1细胞中HSP72、Bcl-2、Bax、AIF和Cyt.c的基因表达以及Caspase-9和Caspase-3的活性。结果显示,42℃热应激1 h,LLC-PK1细胞Bcl-2/Bax(P0.05)和AIF(P0.01)基因表达以及Caspase-3(P0.01)活性从0 h开始升高(P0.01),到2 h达到最高(P0.01);HSP72基因表达和Caspase-9活性0 h即达到最高(P0.01);Cyt.c基因表达在2 h开始极显著升高(P0.01),并且此时最高,8 h以后全部因子恢复到正常水平。结果表明,42℃热应激1 h即激活LLC-PK1细胞线粒体凋亡通路,且热应激后的0~8 h线粒体凋亡通路处于活化状态,其中2 h时最为活跃。  相似文献   

6.
The paper Inspects the Bcl-2 and Bax protein expressions in vivo Wistar mice cells stimulated by steep pulse field, and puts forward the mechanism of steep pulse inducing apoptosis. Bcl-2/Baxprotein expression positive rate and apoptotic cell rate are determined by using immunohistochemical technique and TUNEL in 18 Wistar mice transplanted with Walker-256 cell line. Compared with control group, protein expressions of Bcl-2 and Bax in treated group decrease and increaserespectively. Apoptosis occurrswhen tumor tissue are impulsed by steep pulse field.  相似文献   

7.
Tea cell suspension culture is an alternative method for the synthesis of secondary metabolites. For the separation of cells, different concentrations of pectinase were used and a concentration of 0.5% was found to be the optimum concentration for the separation of cells (41.7%) in the culture medium than the other two concentrations (33.3 and 25.0%). The separated cells were cultured in liquid MS medium using different PGR combinations. The time taken for the cells to reach stationary phase, under different PGRs, ranged from 17 to 21 d. The maximum cell density was found in IAA and 2, 4-D medium at 21 d followed by 2, 4-D. Results revealed that the amount of secondary metabolites such as catechins were high with stationary phase when compared to other growth phases (lag and log phases). Different concentrations of shikimic acid (10, 20, and 30 mM) were added to the stationary phase of cell culture in the bioreactor and the secondary metabolite content was analyzed. Synthesis of polyphenols, catechins, caffeine, and other secondary components were high (33.87, 22.85, and 4.66%) with 20 mM shikimic acid treatment than the other two concentrations.  相似文献   

8.
[Objective] To observe the effects of water decoction of Plumbago zeylanica Linn.on the proliferation,apoptosis and cell cycle of rats hepatic stellate cells,and to discuss the function and mechanism of anti-hepatic fibrosis of P.zeylanica.[Methods] SD rats were given water decoction of P.zeylanica by gavage,so as to obtain medicated serum.Medicated serum was incubated together with hepatic stellate cells( HSC-T6) according to different dosage groups.Blank control group was desgined; and medicated serum groups of colchicine and Compound Biejiaruangan Tablet were taken as the positive control groups.Proliferation of HSC-T6 was detected after incubation by MTT colorimetry; cell apoptosis and the DNA content in each cell phase was detected by flow cytometer.[Results]Inhibitory rate and apoptosis rate: compared with blank control,inhibitory rate and apoptosis rate in medicated serum groups enhanced significantly,showing significant differences( P 0.01).When the dosage of medicated serum was within 5%- 20%,inhibitory rate and apoptosis rate of HSC-T6 enhanced as dosage increased.Inhibitory rate and apoptosis rate in medicated serum group of high dosage were significantly higher than those in colchicine groups,but was equal to those in Compound Biejiaruangan Tablet group.Cell cycle: there were no significant changes in cell percentage in each group at G2/M phase.Compared with blank control group,cell percentages of medicated serum groups of P.zeylanica enhanced significantly at G0/G1 phase,and reduced significantly at S phase,showing significant changes( P 0.01).When the dosage of medicated serum reduced within 20%- 5%,the cell percentage gradually declined at G0/G1 phase,and gradually increased at S phase.Under the same serum concentration,cell percentage of P.zeylanica group enhanced significantly at G0/G1 phase and decreased obviously at S phase compared with that of colchicine group.There were no significant changes in Compound Biejiaruangan Tablet group.[Conclusions] Medicated serum of P.zeylanica could restrict G1/S proliferation and induce its apoptosis,showing a dose-dependent manner.Medicated serum group of P.zeylanica had stronger effects than medicated serum group of colchicine,while had equal effects to the group of Compound Biejiaruangan Tablet.The mechanism of medicated serum of P.zeylanica in inhibiting HSC-T6 proliferation was to block cell cycle at G0/G1 phase,and to prevent it from passing G1/S.  相似文献   

9.
[Objective] Novel germplasm of cotton was generated for development of cultivars with high resistance to glyphosate. [Method] The glyphosate resistance gene G10eve was preliminarily analyzed using bioinformatics methods and introduced into 'Coker 312' via Agrobacterium-mediated transformation. The expression of G10eve was estimated by PCR (Polymerase chain reaction) and qRT-PCR (Quantitative real-time PCR). The content of shikimic acid and tolerance to glyphosate were determined in response to application of glyphosate to 'Coker 312' and transgenic plants. [Result] A total of 28 independent positive transgenic lines were obtained. The transformation efficiency and the rate of seedling differentiation were up to 49.3% and 40.6%, respectively. PCR and qRT-PCR analysis showed that G10eve was integrated into the cotton genome, and the G10eve expression level differed significantly among the transgenic lines. At the cotyledon stage, the transgenic cotton showed resistance to 8 mL·L－1 glyphosate, whereas 'Coker 312' showed phytotoxicity to the 2 mL·L－1 glyphosate treatment. No significant accumulation of shikimic acid was detected in transgenic plants before or after glyphosate treatment, which indicated the typical physical characteristic of glyphosate resistance. [Conclusion] Overexpression of G10eve in cotton improved resistance to glyphosate. Thus, novel germplasm of cotton resistant to glyphosate was generated.  相似文献   

10.
【目的】研究脱落酸(Abscisic acid, ABA)对棉花体细胞胚胎发生过程中下胚轴脱分化和再分化的影响,优化体细胞胚胎发生体系和初步解析脱落酸调控棉花体细胞胚胎发生分子机制。【方法】以棉花品种中棉所24(CCRI 24)下胚轴为外植体,设置5个ABA浓度0、0.02、0.04、0.06、0.08μmol·L^-1,分别以A0、A1、A2、A3、A4表示,添加至MSB(MS培养基+B5维生素)培养基诱导愈伤和胚性愈伤,研究ABA对棉花下胚轴初始细胞脱分化、愈伤组织诱导和胚性愈伤组织诱导的影响。【结果】ABA促进下胚轴初始细胞脱分化;显著提高愈伤组织的脱分化率和增殖率;0.02μmol·L^-1ABA显著提高胚性愈伤分化率,0.04~0.08μmol·L^-1ABA显著降低胚性愈伤分化率。ABA处理后胚性愈伤和非胚性愈伤的增殖率均显著提高且质地受到影响。0.02~0.08μmol ABA处理下,LBD和LBD在愈伤起始期上调表达。0.02μmol·L^-1ABA处理下,在愈伤增殖早期和中期BBM、LEC1和AGL15上调表达,愈伤增殖后期FUS3、LEA、ABI3基因上调表达。【结论】脱落酸调控的棉花体细胞胚胎发生与相关标记基因的时空性表达密切相关,这些基因表达水平的增加是ABA调控愈伤和胚性愈伤分化的分子基础。  相似文献   

11.
采用MTT方法考查不同浓度的马尾藻岩藻聚糖硫酸脂对HepG2细胞存活率的影响,进一步运用流式细胞仪和检测ROS含量探讨马尾藻岩藻聚糖硫酸酯抑制HepG2细胞增殖的机理。结果表明,在0.5~8.0 mg/mL内,HepG2细胞的存活率随着马尾藻岩藻聚糖硫酸脂浓度的升高呈下降趋势。研究发现,随着马尾藻岩藻聚糖硫酸脂浓度的增加,细胞内SubG1和G0/G1的细胞数量升高。而且,通过检测细胞内活性氧(Reactive oxygen species,ROS)含量,发现随着马尾藻岩藻聚糖硫酸脂浓度的增加,细胞内ROS含量显著升高。马尾藻岩藻聚糖硫酸脂抑制HepG2细胞增殖是通过诱导细胞内ROS的过量产生导致细胞发生凋亡和G0/G1阻滞。  相似文献   

12.
[目的]本研究以紫苏愈伤组织为原材料,对液体悬浮培养生产迷迭香酸的培养条件进行了研究。[方法]通过单因素试验,分别考察培养时间、初始接种量、激素浓度及苯丙氨酸浓度对迷迭香酸含量的影响,并在单因素试验基础上,采用Box-Behnken中心组合设计和响应面法对最佳培养条件进行优化,建立了二次多项式回归方程的预测模型。[结果][结论]研究结果表明,紫苏细胞液体悬浮培养生产迷迭香酸的最佳培养条件为：6-BA浓度2.34 mg/L、NAA浓度0.96 mg/L、2,4-D浓度0.60 mg/L、苯丙氨酸浓度0.1 g/L,迷迭香酸含量可达23.61 mg/g。  相似文献   

13.
[Objective]To study the system of aseptic seeding and rapid propogationtin of hybrid seeds of Demdrobium officinale and Dendrobium aduncum [Methods] Demdrobium officinale and Dendrobium aduncum were the objects of research,and their hybrid seeds were gained by artificially auxiliary hybridation. The seeds were induced to germinate in vitro,and study on the technology of aseptic seeding was finished. [Results]Successful hybridation of Demdrobium officinale and Dendrobium aduncum could be easily realized,and hybrid fruit-bearing rate could reach 80%; the suitable culture medium for seeds was: MS +1. 0 mg/L 6-BA +0. 1 mg/L NAA,the germination rate after 30 d of cultivation was 89. 7%; appropriate culture medium for proliferation of protocorm was: MS + 1. 5 mg /L 6-BA + 0. 1 mg /L NAA + 100 g /L banana + 1. 0 mg /L AC; appropriate culture medium for differentiation of protocorm was: MS + 1. 5 mg /L 6-BA + 0. 1 mg /L NAA + 200 g /L potato + 1. 0 g /L AC; the formula of culture medium for strenghening the seedlinge and nurturing the rooting was: 1 /2 MS + 0. 6 mg /L NAA +100 g /L banana + 1. 0 g /L AC,the plant grew robustly,the rooting percentage was 100%,and the survival rate of transplanting was higher than 95%. [Conclusions]This method ascertains the optimum culture media formula in the whole regeneration process and all phases from seed germination to acclimatization and transplantation,so fine solidation is laid for its germplasm innovation and industrialized seedling production.  相似文献   

14.
细胞S期为DNA复制期,探索细胞S期的同步化将为研究各种调控因子对DNA复制、细胞分裂和增殖的影响奠定基础。本研究以家蚕BmN细胞为研究对象,采用脱氧胸苷(TdR)双阻断、脱氧胸苷-诺考达唑(TdR-Nocodazole)双阻断及羟基脲(HU)法,探索BmN细胞S期同步化的最佳体系。结果发现,TdR双阻断法处理对BmN细胞S期的同步化效率为67.2%,TdR-Nocodazole双阻断法处理为69.7%,HU处理对S期同步化效果最好,达90%以上。进一步对HU处理后不同释放时间点的细胞进行研究发现,1 mmol/mL HU处理后释放7 h时BmN细胞S期同步化效率最高,达94.9%。通过不同处理方法研究家蚕BmN细胞的S期同步化效果,发现1 mmol/mL的HU处理16 h,然后于正常培养基中释放7 h,可有效的将BmN细胞同步化在S期,且该处理方法简单,易于操作。  相似文献   

15.
【研究目的】研究不同浓度的柠檬酸和苹果酸溶液浸种对小白菜种子萌发、幼芽生长及种胚细胞膜透性的影响。【研究方法】将有机酸浸泡后的小白菜种子,摆放在培养皿中恒温培养,测定发芽率等指标;用电导率仪测定小白菜种子细胞膜透性。【研究结果】（1）柠檬酸浓度达64mmol/L,苹果酸浓度达32mmol/L时,有机酸处理的种子发芽率和发芽指数显著低于对照;（2）有机酸浓度为128 mmol/L时,柠檬酸处理的小白菜胚根重、胚根长和茎长分别是对照的50%、60.5%和47.4%;苹果酸处理对应的值分别为26.8%、44.1%和30.0%;（3）有机酸对小白菜种子细胞膜透性影响显著,且随处理浓度增加细胞膜透性逐渐增加。【研究结论】两种有机酸对小白菜种子萌发和幼芽的生长均有抑制作用,且浓度相同时,苹果酸的抑制作用比柠檬酸强  相似文献   

16.
[Objective] Free amino acids are important nitrogen nutrients, and their changes reflect the interaction between insects and host plants. The purpose of this experiment was to study the effect of aphid feeding on the free amino acid content of host cotton in seedling stage. [Method] The seedling cotton infected by aphid with different damage grades was selected from the field and analyzed the content of free amino acid in euphylla, cotyledon, hypocotyl and root. [Result] The content of free amino acids in cotton tissues increased after feeding by Aphis gossypii, and the content of free amino acids in cotyledon, hypocotyl and root is more than 2 times of the level 0. The content of non-essential amino acids increased more significantly than that of essential amino acids. The changes of single free amino acid content in different tissues were not completely consistent, and the Asn and Glu increased significantly in all tissues. [Conclusion] The feeding behavior of cotton aphid affects the nutritional level of cotton tissue and the content of free amino acid increased significantly.  相似文献   

17.
In perennial crops like coffee, glyphosate drift exposure can occur multiple times during its commercial life span. Due to limited glyphosate degradation in higher plants, a potential accumulation of glyphosate could lead to increased biological effects with increased exposure frequency. In this study, we investigated glyphosate translocation over time, and its concentration and biological effects after single and multiple simulated spray-drift exposures. Additionally, shikimic acid/glyphosate ratios were used as biomarkers for glyphosate binding to its target enzyme.Four weeks after the exposure, glyphosate was continuously translocated. Shikimic acid levels were linear correlated with glyphosate levels. After two months, however, glyphosate appeared to have reduced activity. In the greenhouse, multiple applications resulted in higher internal glyphosate concentrations. The time of application, however, was more important regarding biological effects than the number of applications both in the greenhouse and in the field. In the field, berry yield, the most important biological response variable, was reduced 26% by the first out of four sequential applications of glyphosate at 64 g a.e. ha−1 each. The three subsequent applications did not reduce yield any further.  相似文献   

18.
壳聚糖复合涂膜对杏鲍菇保鲜效果的研究   总被引：4，自引：1，他引：3  
【研究目的】杏鲍菇在采后易失水褐化等原因降低食用及商品价值,为延长其货架期,需筛选出适于杏鲍菇的壳聚糖复合涂膜。【方法】该实验以杏鲍菇（Pleurotus eryngii）为研究材料,在室温（22±2℃）条件下,以去离子水浸涂杏鲍菇为对照,采用不同的壳聚糖复合涂膜处理进行保鲜实验,通过L9（33）正交试验筛选杏鲍菇保鲜的最佳复合涂膜配方,并研究其生理效应。【结果】结果表明,与对照相比,筛选出的最佳壳聚糖复合涂膜液能够有效降低杏鲍菇的褐变程度与含水率,延缓游离氨基酸含量、可溶性蛋白含量、可溶性总糖等各指标的变化幅度,保鲜效果达到显著水平（P＜0.05）。【结论】适于杏鲍菇的壳聚糖复合涂膜的配比为1.5%的壳聚糖+1.0%的乙酸+0.03%的吐温20+3.0%的甘油,该涂膜起到延缓杏鲍菇采后衰老,保持较好的营养价值和加工风味,达到保鲜目的。  相似文献   

19.
通过研究转化生长因子β(transforming growth factor-β, TGF-β)的特异性小分子拮抗剂SB-431542对梅花鹿鹿茸软骨层细胞增殖的影响,探讨转化生长因子β在鹿茸快速生长中的调节机制。分离培养生长30天的梅花鹿鹿茸软骨层细胞,将传代培养第2代的细胞经不同浓度的SB-431542 (0,1,3,5,8,10μM)作用,培养48小时后用MTT法测其细胞增殖的变化,并用SPSS软件分析其差异性。结果显示,SB-431542处理组细胞增殖活性都低于对照组(P＜0.05),其中浓度为8μM和10μM的SB-431542处理组与对照组相比差异非常显著(P＜0.01),随着添加SB-431542浓度的升高,对细胞的生长速度抑制更加明显,试验表明,TGF-β对维持梅花鹿鹿茸软骨层细胞的快速增殖有重要作用。  相似文献   

20.
采用浸种培养的方法,将人参根系分泌物组分为:苯甲酸、邻苯二甲酸二异丁酯、丁二酸二异丁酯、棕榈酸和2,2-二(4-羟基苯基)丙烷,稀释成1.00、0.10 mg/L和0.01 mg/L水溶液,在培养皿中培养人参种子特定时间后,测量种子胚根及胚轴长度,研究不同化感物质对人参种子萌发的自毒效应.研究发现,苯甲酸和2,2-二(4-羟基苯基)丙烷在1.00 mg/L时对胚根生长有显著抑制作用,棕榈酸在该浓度对胚轴生长的抑制作用达极显著水平;邻苯二甲酸二异丁酯在0.10mg/L时对胚根生长表现轻微促进作用;除2,2-二(4-羟基苯基)丙烷外的4种物质在该浓度下对胚轴生长有抑制作用,苯甲酸和邻苯二甲酸二异丁酯在0.01 mg/L时对胚轴生长表现轻微促进作用,棕榈酸和2,2-二(4-羟基苯基)丙烷表现轻微抑制作用.结果表明,根系分泌物的化感效应与化感物质的种类及浓度表现明显相关性,苯甲酸、2,2-二(4-羟基苯基)丙烷和棕榈酸对人参种子胚根或胚轴生长有较强化感效应.根系分泌物中酚酸和有机酸类化合物加速了人参连作障碍的形成.  相似文献   

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