染料木黄酮对Panc 1细胞株基因表达的影响

目的 研究染料木黄酮对Panc 1细胞株基因表达的影响.方法 用染料木黄酮处理Panc 1细胞株0、1、3、6和12h.从各个样本中提取总RNA并制备成辅酶R标记的探针和人基因组U133A芯片杂交,提取和分析数据.对因染料木黄酮作用而表达水平大幅改变的基因,用实时PCR验证.结果 两次独立实验表明染料木黄酮显著改变了47个基因的表达水平:表达上调的有egr-1和IL-8;下调的有 EGF-R AKT2, CYP1B1, NELL2, SCD, DNA ligase Ⅲ, Rad,和18s及28s rRNA等.这些改变用实时PCR得到了验证,虽然变化的倍数在两种方法中不是完全一致.结论 染料木黄酮的抑癌机制包括了EGF-R信号通路,其中涉及的5个基因表达均下调(EGFR,egr-1,AKT2,CYP1B1和NELL2).染料木黄酮还可能通过抑制AKT2,CYP1B1和DNA连接酶Ⅲ来解除肿瘤细胞的自我保护而起作用.另外,染料木黄酮可能通过抑制SCD的表达来抑制癌肿形成.最后,染料木黄酮抑制rRNA形成从而调节肿瘤生长.     

异黄酮对前列腺癌细胞及PTEN基因的影响

目的 通过大豆异黄酮抑制前列腺癌PC-3和LNCaP细胞生长和相关基因表达的影响，探讨大豆异黄酮类抑制前列腺癌的机制。方法 对染料木黄酮和大豆甙元作用后的雄激素非依赖型前列腺癌(PC-3)、雄激素依赖型前列腺癌LNCaP细胞的存活率、细胞毒作用、细胞周期和PTEN基因的mRNA表达等进行了研究。结果 染料木黄酮和大豆甙元对PC-3、LNCaP细胞抑制效应具有时间和剂量依赖性，具有诱导凋亡和引起坏死效应；染料木黄酮能诱导PC-3和LNCaP细胞的(PTEN)表达，而大豆甙元只能诱导LNCaP细胞PTEN表达。结论 PTEN基因表达的变化可能在染料木黄酮和大豆甙元抑制PC-3和LNCaP细胞中具有重要的意义。染料木黄酮和大豆甙元抑制PC-3和LNCaP细胞可能存在多种作用途径。     

染料木黄酮对大鼠胰岛素分泌的调控作用

<正>我国糖尿病的发病率近年来呈现快速增长的趋势。2型糖尿病以胰岛素分泌相对不足和胰岛素抵抗为主要特征,因此,促进胰岛素分泌是临床治疗2型糖尿病的重要手段。染料木黄酮(genistein)主要来源于豆类植物,大量证据表明染料木黄酮对糖尿病、慢性缺氧、骨质疏松等有一定的预防和治疗作用[1-3]。研究显示,染料木黄酮可改善2型糖尿病大鼠的胰岛素抵抗[1],但其对胰岛素分泌的作用及机制尚不     

染料木黄酮脂质体的制备及其对肿瘤细胞体外增殖的抑制作用

目的研究染料木黄酮脂质体的制备方法及其对肿瘤细胞体外增殖的影响。方法采用超声薄膜法制备染料木黄酮脂质体;活细胞计数法和MTT法观察染料木黄酮脂质体对肿瘤细胞的增殖抑制作用。结果染料木黄酮脂质体的平均粒径为136．7nm,剂量依赖性抑制A549和HepG2细胞的增殖,IC50分别为10．46、12．34μmol／L。结论染料木黄酮脂质体对A549和HepG2肿瘤细胞有明显的增殖抑制作用,且作用强于游离染料木黄酮。     

染料木黄酮对缺氧复氧心肌细胞损伤的影响

目的 探讨染料木黄酮对缺氧复氧心肌细胞损伤的影响与其机制.方法 将心肌细胞H9 c2分成对照组、模型组(缺氧复氧)、染料木黄酮组(缺氧复氧,2 mol·L-1染料木黄酮预处理)、染料木黄酮+anti-miR-NC组(缺氧复氧,转染inhibitor control,2 mol·L-1染料木黄酮预处理)、染料木黄酮+an...     

染料木黄酮抑制前列腺癌进展和转移的机制研究

目的 探讨染料木黄酮对前列腺癌细胞增殖、迁移和侵袭能力的影响及其分子机制。方法 将前列腺癌细胞株LNCaP和CWR22RV1细胞分为对照组（常规培养）和实验组（50μmol/L染料木黄酮处理）。采用噻唑蓝（MTT）法分析染料木黄酮对前列腺癌细胞增殖能力的影响,通过细胞划痕实验和Transwell实验分析染料木黄酮对前列腺癌细胞迁移及侵袭能力的影响。Western blot检测上皮间质转化（EMT）中间质标志物E-钙黏蛋白（ECadherin）、N-钙黏蛋白（N-Cadherin）、波形蛋白（Vimentin）以及肿瘤干细胞标志物CD44和Oct4的蛋白水平。结果MTT实验结果表明,染料木黄酮具有抑制前列腺癌细胞增殖的作用。实验组LNCaP和CWR22RV1细胞划痕闭合率较对照组下调,穿过Transwell膜的细胞数量减少（P<0.05）。Western blot实验证实,染料木黄酮能够下调前列腺癌细胞中间质的标志物N-Cadherin、Vimentin和肿瘤干细胞的标志物CD44与Oct4蛋白表达,上调上皮细胞标志物ECadherin表达（P<0.01）。结论 染料木黄酮通...     

染料木黄酮在大鼠肝微粒体代谢的酶动力学

目的：体外研究大鼠肝微粒体中染料木黄酮代谢的酶动力学，及选择性细胞色素(CYP)酶抑制剂对其代谢的影响。方法：用大鼠肝微粒体研究染料木黄酮代谢的酶动力学，探讨CYP酶的选择性抑制剂对其代谢的影响及参与其代谢的CYP酶。结果：CYP1A2抑制剂呋喃茶碱可以显地抑制染料木黄酮代谢，使染料木黄酮的代谢速率下降。而其它CYP特异性抑制剂对染料木黄酮代谢没有明显的影响。结论：CYP1A2参与了染料木黄酮的代谢，CYP1A2的抑制剂可能会与染料木黄酮发生代谢相互作用，从而降低染料木黄酮的代谢速率。     

染料木黄酮的物化常数测定

目的：测定染料木黄酮在不同溶剂中的溶解度、油／水分配系数、pKa值。方法：采用紫外分光光度法。结果：染料木黄酮在丙酮、乙醇、甲醇中溶解度较乙醚、乙酸乙酯、氯仿、正辛醇等溶剂中高；在酸性条件下油／水分配系数较大；pKa值7．9942。结论：染料木黄酮为弱酸性脂溶性药物。     

染料木黄酮对高同型半胱氨酸诱导的人血管内皮细胞组织因子表达的干预作用

目的探讨染料木黄酮对高同型半胱氨酸诱导的人大隐静脉内皮细胞表达组织因子(TF)的干预作用。方法不同浓度(0,5,10,20,40,50mg/L)染料木黄酮,不同时间(2、4、8、12、24、48、72h)作用于高同型半胱氨酸下(50μmol/L)的人大隐静脉内皮细胞,采用反转录-聚合酶链反应(RT-PCR)和酶联免疫吸附试验(ELISA)法检测TFmRNA表达和TF蛋白浓度。结果作用时间一定时间(24h),随着染料木黄酮浓度的增加,同型半胱氨酸诱导的内皮细胞培养液中TF蛋白浓度及内皮细胞TFmRNA表达水平显著降低(r=0.994,0.992,P<0.05);在染料木黄酮浓度一定(40mg/L)时,随着作用时间的延长,同型半胱氨酸所诱导的内皮细胞培养液中TF蛋白浓度及内皮细胞TFmRNA表达水平显著降低(r=0.972,0.982,P<0.05)。结论染料木黄酮一定程度上可抑制高同型半胱氨酸所致的内皮细胞TF表达的上调,抑制作用具有剂量和时间依赖性。     

染料木黄酮对生长板软骨细胞胶原合成的影响及其机制

目的探讨染料木黄酮(5,7,4′三羟基异黄酮)对大鼠肋生长板软骨细胞(ratcostochondralgrowthplatechondrocyte,RGC)胶原和Sox9表达的影响。方法原代培养RGC,3Hproline参入、RTPCR和Westernblot分别检测染料木黄酮对第1代RGC胶原合成、col2a1基因转录和Sox9表达的影响。结果染料木黄酮抑制RGC的胶原合成(P<0.05),col2a1的转录和Sox9的表达,其抑制作用随着浓度的升高而增强。结论染料木黄酮抑制培养RGC胶原合成的作用至少部分是通过下调Sox9的表达实现的。     

Genistein induces activation of the mitochondrial apoptosis pathway by inhibiting phosphorylation of Akt in colorectal cancer cells

Context: Genistein inhibits the proliferation and induces apoptosis of colorectal cancer cells; however, the underling molecular mechanisms remain to be determined.

Aim: The aim of this study was to investigate whether genistein reduces cell viability by suppressing the phosphorylation of AKT and activating the mitochondrial apoptosis pathway in colorectal cancer cells.

Materials and methods: The anti-proliferative effects of genistein (0, 25, 50, and 100?μM) on HCT-116 and LoVo cells were assessed using MTT assay. Genistein-induced apoptosis was measured by Hoechst 33258 staining and flow cytometry. The mRNA level of Bax was detected by real-time PCR. The protein levels of Bax, total Akt, and phosphorylated Akt were assessed by western blot.

Results: The IC₅₀ values of genistein were 690, 135, and 61?μM in HCT-116 cells and 204, 135, and 93?μM in LoVo cells after treatment for 24, 48, and 72?h, respectively. After treatment with different concentrations of genistein (0, 25, 50, and 100?μM) for 48?h, the early apoptotic cells in HCT-116 increased from 1.99%?±?0.55% to 6.78%?±?2.12%, 23.16%?±?3.87%, and 36.99%?±?3.76%, respectively. The same concentrations of genistein increased the early apoptotic cells in LoVo from 2.56%?±?1.42% to 3.21%?±?1.52%, 18.22%?±?3.56%, and 23.56%?±?3.02%, respectively. Moreover, genistein increased the mRNA and protein levels of Bax, while it inhibited the phosphorylation of Akt in HCT-116 cells.

Conclusion: Genistein inhibited cell proliferation and induced apoptosis of colorectal cancer cells. Genistein induced the mitochondrial pathway of apoptosis in HCT-116 cells by inhibiting phosphorylation of Akt.     

Protection by genistein on cortical neurons against oxidative stress injury via inhibition of NF-kappaB,JNK and ERK signaling pathway

Abstract

Context: Genistein, one of the isoflavones derived from soybean seeds, has been reported to exert multiple bioactivities. However, the mechanism of its action on the central nervous system is not fully understood.

Objective: To investigate the cytoprotection of genistein and its molecular mechanism against H₂O₂-induced cell death in primary rat cortical neurons.

Materials and methods: Genistein (0.01, 0.1, and 1?μM) were added into the primary rat neurons 24?h before and co-cultured with 500?μM H₂O₂ for 1?h. Neuronal injury was assessed by MTT, lactate dehydrogenase (LDH) assay, and Hoechst33258 staining. Intracellular reactive oxygen species (ROS) generation induced by H₂O₂ was determined. Neuronal apoptosis was evaluated by Bcl-2/Bax ratio as well as by caspase-9 and caspase-3 activities. The protein levels and phosphorylation of NF-κB/p65, IκB, JNK, and ERK were detected by western blots.

Results: Genistein pretreatment attenuated H₂O₂-mediated neuronal viability loss, nuclear condensation, and ROS generation in a concentration-dependent manner. Genistein exerted anti-apoptotic effects by reversing the apoptotic factors Bcl-2 and Bax ratio, along with the suppression of caspase-9 and caspase-3 activities. In addition, genistein down-regulated the expression of NF-κB/p65, and suppressed the phosphorylation of p65 and IκB. Genistein also inhibited H₂O₂-induced activation of the MAPK-signaling pathway including JNK and ERK.

Discussion and conclusion: The results indicated that genistein effectively protects cortical neurons against oxidative stress at least partly via inactivation of NF-κB as well as MAPK-signaling pathways, and suggested the possibility of this antioxidant for the prevention and treatment of stroke.     

Genistein induces apoptosis in vitro and has antitumor activity against human leukemia HL‐60 cancer cell xenograft growth in vivo

Genistein, a major isoflavone compound in soybeans, has been shown to have biological activities including anti‐cancer activates. In the present, we investigated the anti‐leukemia activity of genistein on HL‐60 cells in vitro. The percentage of viable cell, cell cycle distribution, apoptotic cell death, reactive oxygen species (ROS), and Ca²⁺ production and the level of ΔΨ_m were measured by flow cytometric assay. Cell apoptosis and endoplasmic reticulum (ER) stress associated protein expressions were examined by Western blotting assay. Calpain 1, GRP78, and GADD153 expression were measured by confocal laser microscopy. Results indicated that genistein‐induced cell morphological changes, decreased the total viable cells, induced G₂/M phase arrest and DNA damage and fragmentation (cell apoptosis) in HL‐60 cells. Genistein promoted ROS and Ca²⁺ productions and decreased the level of ΔΨ_m in HL‐60 cells. Western blotting assay demonstrated that genistein increased ER stress‐associated protein expression such as IRE‐1α, Calpain 1, GRP78, GADD153, caspase‐7, caspase‐4, and ATF‐6α at 20‐50 μM treatment and increased apoptosis associated protein expression such as pro‐apoptotic protein Bax, PARP‐cleavage, caspase‐9, and ‐3, but decreased anti‐apoptotic protein such as Bcl‐2 and Bid in HL‐60 cells. Calpain 1, GRP78, and GADD153 were increased in HL‐60 cells after exposure to 40 μM of genistein. In animal xenografted model, mice were intraperitoneally injected with genistein (0, 0.2, and 0.4 mg/kg) for 28 days and the body weight and tumor volume were recorded. Results showed that genistein did not affect the body weights but significantly reduced the tumor weight in 0.4 mg/kg genistein‐treated group. Genistein also increased the expressions of ATF‐6α, GRP78, Bax, Bad, and Bak in tumor. In conclusion, genistein decreased cell number through G₂/M phase arrest and the induction of cell apoptosis through ER stress‐ and mitochondria‐dependent pathways in HL‐60 cells and suppressed tumor properties in vivo.     

Platelet-activating factor stimulation of tyrosine kinase and its relationship to phospholipase C in rabbit platelets: studies with genistein and monoclonal antibody to phosphotyrosine.

Platelet-activating factor (PAF) is a proinflammatory lipid that has platelet-stimulating property. PAF receptor-coupled activation of phosphoinositide-specific phospholipase C (PLC) and phosphorylation of several proteins has already been established in our laboratory. To investigate further the molecular mechanism and relationship between activation of PLC and protein phosphorylation, we have used Genistein (a putative inhibitor of tyrosine-specific protein kinases), phosphotyrosine antibody, and phosphoamino acid analysis to probe the involvement of tyrosine kinase in this process. Washed rabbit platelets were loaded with myo-[2-3H]inositol and challenged with PAF (100 nM) after pretreatment with Genistein. PLC-mediated production of radioactive inositol monophosphate, inositol diphosphate, and inositol triphosphate was monitored. PAF alone caused stimulation of PLC activity [( 3H]inositol triphosphate production), whereas pretreatment with Genistein (0.5 mM) diminished PAF-stimulated PLC activity to basal level. Genistein also blocked PAF-stimulated platelet aggregation at this dose. In contrast to Genistein, staurosporine which inhibits protein kinase C, potentiated PAF-stimulated [3H]inositol triphosphate production. Genistein substantially inhibited the combined effects of staurosporine and PAF on inositol triphosphate production. Genistein also reduced PAF-induced phosphorylation of Mr 20,000 and 50,000 proteins. Phorbol 12-myristate 13-acetate-induced Mr 40,000 protein phosphorylation was also affected by Genistein. The above results suggested that Genistein inhibited tyrosine kinase at an early stage of signal transduction by inhibiting PLC. This, in turn, decreased the activation of protein kinase C and, therefore, caused a reduction in Mr 40,000 protein phosphorylation. The inhibition of PLC by Genistein raised the possibility of involvement of tyrosine kinase in PAF receptor-coupled PLC activation. Western blot analysis using monoclonal antibody to phosphotyrosine demonstrated that PAF stimulated the tyrosine phosphorylation of two major proteins of 50,000 and 60,000 molecular weight. When platelets were challenged with PAF after treatment with either Genistein or CV-6209 (a PAF receptor antagonist), the reactivity of these proteins to monoclonal antibody was inhibited. Phosphoamino acid analysis of Mr 50,000 and 60,000 proteins confirmed that PAF increased the phosphorylation of tyrosine residues in both Mr 50,000 and 60,000 proteins and that this was inhibited by Genistein. Thus, PAF caused a receptor-dependent phosphorylation of tyrosine residues on Mr 50,000 and 60,000 proteins. Based on these observations, it is concluded that tyrosine kinase is involved in the PAF receptor-coupled PLC activation and signal transduction mechanism.     

Genistein sensitizes hepatic insulin signaling and modulates lipid regulatory genes through p70 ribosomal S6 kinase-1 inhibition in high-fat–high-fructose diet-fed mice

Abstract

Context: Genistein reduces high-calorie diet-induced insulin resistance and fat accumulation in animals, but the mechanism is unresolved.

Objective: This study explores whether action of genistein is associated with p70 ribosomal S6 kinase-1 (S6K1) inhibition.

Materials and methods: Adult male mice were fed either normal diet or high-fat–high-fructose diet (HFFD) for 15 days, after which animals in each dietary group were divided into two groups and administered either genistein (1?mg?kg^?1?day^?1, p.o.) in 0.5?ml of 30% dimethylsulfoxide (DMSO) or 30% DMSO (0.5?ml) for the next 45 days. At the end of the study, their liver was analyzed for lipid content. Semi-quantitative RT-PCR and western blotting methods were used to analyze lipid regulatory genes and insulin signaling proteins, respectively.

Results: Genistein significantly (p?<?0.05) lowered HFFD-induced body and liver weight gain and plasma and hepatic lipid levels. Histology showed a 2.5-fold increase of lipid in HFFD compared to control. Genistein treatment to HFFD-fed animals significantly decreased lipid accumulation (by 40%) compared to HFFD. Insulin-stimulated tyrosine phosphorylation of insulin receptor-β and insulin receptor substrates-1 (IRS-1), IRS-1 associated phospatidylinositol-3kinase (PI3K) and Akt Ser⁴⁷³ phosphorylation were improved while IRS-1 serine phosphorylation was significantly (p?<?0.05) decreased by genistein in HFFD. Significant (p?<?0.05) increase in adenosine monophosphate-activated protein kinase (AMPK) Thr¹⁷² phosphorylation and decrease in S6K1 Thr³⁸⁹ phosphorylation were observed in HFFD-plus genistein compared to HFFD. Genistein downregulated lipogenic genes and upregulated fatty acid oxidative genes in HFFD-fed mice.

Conclusion: Genistein improves insulin signaling and attenuates fat accumulation in liver through S6K1 inhibition.     

IGF-I receptor signaling pathway is involved in the neuroprotective effect of genistein in the neuroblastoma SK-N-SH cells

Genistein, an isoflavone naturally found in soy products, displays estrogenic properties. Our previous study clearly demonstrated that genistein can activate the insulin-like growth factor-I receptor (IGF-IR) signaling pathway in human breast cancer MCF-7 cells. The present study aims to test the hypothesis that the IGF-I receptor signaling pathway is involved in the neuroprotective effects of genistein in neuroblastoma SK-N-SH cells. Our results revealed that pretreatment with genistein resulted in an enhancement in the survival of human neuroblastoma SK-N-SH cells against 6-hydroxydopamine (6-OHDA)-induced neurotoxicity. 6-OHDA arrested the cells at G(0)G(1) phase and prevented S phase entry. Genistein pretreatment could reverse the cytostatic effect of 6-OHDA on cell cycle. The decreased mitochondrial membrane potential induced by 6-OHDA could be also reversed by genistein pretreatment. These effects could be completely blocked by co-treatment with JB-1, which is the specific antagonist of the IGF-I receptor. Furthermore, genistein pretreatment restored the 6-OHDA-induced up-regulation of Bax and down-regulation of Bcl-2 mRNA and protein expression. Genistein treatment alone could significantly increase the phosphorylation level of MEK and induce ERE luciferase activity. Co-treatment with IGF-I could enhance the effect of genistein on cell proliferation and MEK phosphorylation. This study provides the first evidence that genistein has neuroprotective effects against 6-OHDA-induced neurotoxicity in SK-N-SH cells and activation of the IGF-I receptor signaling pathway might be involved in actions of genistein.     

Genistein,an isoflavone included in soy,inhibits thrombotic vessel occlusion in the mouse femoral artery and in vitro platelet aggregation

Diet can be the most important factor that influences risks for cardiovascular diseases. Genistein included in soy is one candidate that may benefit the cardiovascular system. Here, we investigated the inhibitory effects of genistein on thrombotic vessel occlusion in the mouse femoral artery using a photochemical reaction, and in vitro platelet aggregation in whole blood measured by single platelet counting. Genistein (10 mg/kg), intravenously administered 10 min before the rose bengal injection, significantly prolonged the thrombotic occlusion time from 6.1+/-0.4 to 8.4+/-0.8 min (P<0.05). Genistein at doses higher than 30 microM significantly (P<0.01) inhibited in vitro platelet aggregation induced by collagen (1 and 3 microg/ml). When 10 mg/kg genistein was intravenously administered, ex vivo platelet aggregation induced by collagen (1 and 3 microg/ml) was significantly suppressed (P<0.01). In conclusion, genistein prevented in vivo thrombogenesis and suppressed in vitro platelet aggregation. These results suggest that dietary supplementation of soy may prevent the progression of thrombosis and atherosclerosis.     

Genistein induces apoptosis in ovarian cancer cells via different molecular pathways depending on Breast Cancer Susceptibility gene-1 (BRCA1) status

It has been reported that Breast Cancer Susceptibility gene-1 & 2 (BRCA1 & 2 are potential molecular targets for chemoprevention by isoflavone genistein (4' 5, 7-trihydroxy isoflavone), in breast and prostate cancer cells. It is also known that BRCA1 has inhibitory activity on estrogen receptor-alpha and genistein's action on cells is mainly through modulation of estrogen receptor activity. The action of genistein with respect to BRCA1 status in ovarian cancer cells has not been reported so far. Therefore in this study, we analyzed the action of genistein on BRCA1 antisense blocked (AS4) and unblocked (NEO) BG-1 ovarian cancer cells. We found that genistein induced comparable cytotoxic effect in both AS4 and NEO cells, but through different pathways. We found that genistein induces caspase 8 dependent apoptotic pathway in NEO cells. Genistein inhibits estrogen receptor-alpha and activates BARD1 in BRCA1 blocked cells and induces estrogen receptor-beta and FAS in presence of BRCA1. It can be concluded that even though there is no difference in the extent of cell death or apoptosis, the molecular mechanism of action of genistein in inducing apoptosis is different in BRCA1 blocked and unblocked cells. This could partially explain the beneficial effects of genistein in both wild type and mutated BRCA1 estrogen receptor positive tumors.     

金雀异黄素对K562细胞的生长抑制和诱导凋亡作用

目的探讨金雀异黄素对人红白血病细胞系K562细胞的生长抑制、诱导凋亡作用。方法不同浓度的金雀异黄素处理K562细胞后,用MTT比色法检测细胞生长增殖作用,Wright-Gimesa法观察细胞的形态学变化,FCM检测K562细胞凋亡峰。结果金雀异黄素对K562细胞具有与时间、浓度呈正相关的生长抑制作用。形态学显示金雀异黄素高浓度组细胞发生核固缩、核碎裂,并有凋亡小体出现。细胞周期显示对照组K562G2／M期细胞8．9％,金雀异黄素75gmol·L^-1时升高到60．6％（P〈0．05）;金雀异黄素75gmol·L^-1时K562细胞亚G1期细胞为27．3％,对照组为0．4％（P〈0．05）。结论金雀异黄素对K562细胞具有很强的生长抑制作用,K562细胞可发生明显G2／M期阻滞,金雀异黄素诱导了K562细胞发生凋亡。     

染料木素在乳腺癌MCF-7细胞内的代谢研究

目的研究染料木素在乳腺癌细胞中的代谢行为。方法将10μmol.L-1染料木素与乳腺癌MCF-7细胞在37℃下孵化一定时间后终止反应。采用UPLC-MS-MS法测定孵化液中染料木素及II相代谢产物的浓度。结果染料木素在乳腺癌MCF-7细胞中可迅速代谢为7或4′-葡萄糖醛酸结合物以及7或4′-硫酸结合物。孵化24、48和72 h后,每100μg孵化样品蛋白中,7-葡萄糖醛酸结合物的生成率分别为2.9、5.2和8.9μg.h-1,4′-葡萄糖醛酸结合物的生成率分别为1.1、1.9和3.0μg.h-1,7-硫酸结合物的生成率分别为20.3、32.9和47.3μg.h-1,4′-硫酸结合物的生成率分别为1.7、3.1和4.5μg.h-1。结论染料木素在乳腺癌MCF-7细胞中的主要代谢产物是7-硫酸结合物。