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1.
目的通过观察不同浓度过氧化氢(H2O2)对人胎盘滋养层细胞HTR-8/SVneo处理不同时间后的氧化应激状态,探讨建立H2O2诱导HTR-8/SVneo胎盘滋养细胞氧化损伤模型的最佳条件。方法2017年11月至2018年2月于西安交通大学第一附属医院进行实验研究。将HTR-8/SVneo细胞实验组分别给予不同终浓度的H2O2(50、150、300、500μmol/L),同时设立对照组,相同实验条件下分别继续培养1、3、6、12h,随后对此进行细胞存活率、细胞形态学观察,对超氧化物歧化酶(SOD)、丙二醛(MDA)、乳酸脱氢酶(LDH)、过氧化氢酶(CAT)测定,流式细胞仪分析活性氧自由基(ROS)水平和细胞凋亡的水平。结果与对照组比较,300μmol/L 3h经H2O2处理后可降低HTR-8/SVneo细胞的存活率(P=0.00<0.01),而且提高了LDH的释放,促使了SOD、CAT活性的下降和MDA含量的增加(P=0.00<0.01)。300μmol/L3h经H2O2处理后增加了细胞的凋亡率(P=0.00<0.01)及细胞内ROS水平(P=0.00<0.01)。同时,300μmol/L3h经H2O2处理后可明显促进细胞的形态学改变。结论通过H2O2可以成功建立HTR-8/SVneo氧化应激损伤细胞模型,最佳实验条件为300μmol/L H2O2处理3h。 相似文献
2.
[目的 ]探讨铁路危险品货运站空气污染颗粒提取物诱导大鼠肺细胞氧化应激损伤作用的机制。 [方法 ]应用滤膜法采集铁路危险品货运站空气颗粒提取物。常规分离与原代培养大鼠肺Ⅱ型细胞 ,以N 乙酰半胱氨酸 (NAC)、维生素E(VitE)、维生素C(VitC)和甘露醇 (MT)等不同作用位点的抗氧化剂预处理 3 0min后 ,加入空气颗粒提取物染毒 2 4h。采用四氮甲基唑蓝比色法、溴乙锭荧光法检测肺细胞的生长情况和DNA交联的形成。 [结果 ]在 1 0 2~ 8 13mg/ml浓度范围内 ,铁路危险品货运站空气颗粒提取物对大鼠肺细胞有明显的细胞毒性和致DNA交联作用。加入NAC、VitE、VitC和MT可有效地减低铁路危险品货运站空气污染颗粒提取物所致的细胞毒性 ,VitE、VitC则具有减低铁路危险品货运站空气污染颗粒提取物所致的DNA损伤作用。 [结论 ]铁路危险品货运站空气污染颗粒提取物对大鼠肺细胞具有氧化应激作用 ,其可能途径是产生活性氧自由基、羟自由基或导致细胞过氧化等 相似文献
3.
《卫生研究》2016,(6)
目的探索十溴联苯醚(PBDE-209)诱导小鼠海马神经元细胞凋亡的潜在机制。方法原代海马神经元细胞和海马神经元细胞系HT-22用0、6.25、12.5、25、50和100μg/mL PBDE-209处理24 h。检测原代海马神经元细胞SOD活性,MDA、NO和GSH的含量,用Annexin V/PI双染法检测海马神经元细胞系HT-22细胞凋亡情况,用免疫蛋白印迹Western blot检测Bax、Bcl-2、CHOP、GRP78、PERK和Caspase-12蛋白表达水平。结果染毒组原代海马神经元细胞和HT-22细胞系细胞存活率显著降低(P0.05)。原代海马神经元细胞MDA、NO含量显著升高(P0.05),GSH含量、SOD活性显著降低(P0.05);原代海马神经元细胞的Bax/Bcl-2比值、CHOP、Caspase-12蛋白表达水平升高(P0.05)。HT-22细胞系GRP78、PERK、Caspase-12表达水平和细胞凋亡率升高(P0.05)。结论氧化应激和内质网应激可能参与PBDE-209诱导的海马神经元细胞凋亡过程。 相似文献
4.
《卫生研究》2014,(5)
目的以H2O2诱导大鼠原代海马神经细胞建立氧化损伤细胞模型。方法取新生大鼠海马神经细胞,培养至第5天,加入终浓度为50、100、150、200和250μmol/L的H2O2,培养12、24和48 h后,观察细胞形态,通过MTT法测定细胞存活率,CCK-8法测定细胞损伤率,LDH酶标法测定上清液LDH活性,Annexin V-FITC/PI流式细胞术检测细胞凋亡率,确定出细胞损伤的最佳浓度时间。结果 H2O2可诱导神经细胞损伤且呈时间浓度依赖性。150μmol/L H2O2作用24 h时,MTT法测得细胞存活率为(70.18±4.66)%;CCK-8法测得细胞损伤率为(28.30±6.72)%;LDH酶标法测得LDH活性为(208.81±12.24)U/L;流式细胞术测得细胞早期凋亡率为(11.53±2.53)%,晚期凋亡率及坏死率为(13.75±2.22)%。结论 150μmol/L的H2O2作用24 h,可成功构建海马神经细胞氧化损伤模型。 相似文献
5.
目的观察硫酸镍(NiSO4)亚慢性染毒后对大鼠睾丸细胞的氧化作用。方法健康雄性Wistar大鼠32只,随机分为4组:生理盐水(NS)组,硫酸镍(NiSO4)1.0,2.0,4.0 mg/kg组。腹腔注射染毒,0.2 ml/100(g.bw),1次/d,连续30 d。制备睾丸组织匀浆,采用分光光度法检测睾丸组织中脂质过氧化物(LPO)、总抗氧化能力(T-AOC)、抗-活性氧(anti-ROS)、谷胱甘肽过氧化物酶(GSH-Px)水平的变化。结果染毒组与对照组比较,大鼠睾丸脏器系数无明显变化(P>0.05)。镍可诱导睾丸组织中LPO含量升高,2.0,4.0 mg/kg NiSO4组与对照组比较差异有统计学意义(P<0.05);2.0,4.0 mg/kg NiSO4组anti-ROS和GSH-Px活性低于对照组(P<0.01);各染毒组T-AOC均低于对照组(P<0.01)。结论镍对大鼠生殖系统的损伤可能与其所致的睾丸细胞氧化损伤有关。 相似文献
6.
目的 观察螺内酯对醛固酮诱导的大鼠肾小球系膜细胞(mesangial cells,MCs)氧化应激的影响,探讨其肾脏保护机制.方法 体外培养大鼠MCs,设正常对照组、醛固酮(10-7 mol/L)刺激组、不同浓度螺内酯(10-7、10-8、10-9mol/L)干预组.以2',7'-二氯双氢荧光素二乙酸酯(2',7'-dichlorofluorescein diacetate,DCFH-DA)为细胞内H2O2的荧光探针标记细胞,采用流式细胞术检测系膜细胞内活性氧(reactive oxygen species,ROS)水平;采用比色法检测培养细胞上清液中丙二醛(malondialdehyde,MDA)的含量和超氧化物歧化酶(superoxide dismutase,SOD)活性.结果 与正常对照组比较,醛固酮刺激系膜细胞48 h后,细胞内ROS水平明显增加,上清液中MDA含量增高、SOD活性下降,差异均有统计学意义(均有P<0.05).螺内酯干预可明显抑制醛固酮刺激下的系膜细胞的上述反应,差异均有统计学意义(均有P<0.05),且呈浓度依赖性.结论 螺内酯可呈浓度依赖性地抑制醛固酮诱导的大鼠MCs氧化应激,该作用可能是其肾脏保护机制之一. 相似文献
7.
卵泡发育和闭锁与卵巢细胞凋亡的研究进展 总被引:7,自引:0,他引:7
近年来对卵巢细胞凋亡的胞内机制研究取得了很大的进展,已知卵巢体细胞和生殖细胞的凋亡参与了卵泡的发育和闭锁,体细胞(主要指颗粒细胞)的凋亡决定于Bcl-2家族,Caspases家族和Apaf-1三大类基因表达产物的相互作用与平衡,其中Bcl-2家族又分为三个亚家族,对凋亡分别有着抑制或促进的作用,它们之间亦保持着平衡,Caspases家族成员又有不同的分工,分别在凋亡的起始和效应阶段发挥作用,Apaf-1则是连接上游调控因子(如Bcl-2家族)和下游效应分子(如Caspases家族)的重要的中间蛋白质,颗粒细胞的凋亡主要在发育晚期的卵泡闭锁中起主导作用,而卵细胞的凋亡主要在发育早期的卵泡闭锁中起主导作用。 相似文献
8.
子宫内膜异位症患者常伴有卵泡发育迟缓、卵母细胞成熟障碍等问题,严重影响患者生育能力。子宫内膜异位症患者颗粒细胞凋亡及氧化应激事件的发生、细胞能量代谢及类固醇合成能力受损可能是其卵泡发育异常、卵母细胞质量下降的原因。而卵巢内膜异位囊肿引起炎症反应发生,使卵泡过度激活、卵巢皮质纤维化,直接影响卵巢储备。本文对子宫内膜异位症... 相似文献
9.
林蓂;朱凤;杨松;毕真真;庞锦萍;王如伟 《营养学报》2024,(2):203-205
<正>雄激素性脱发(androgeneticalopecia,AGA)是一种由激素、遗传、环境及年龄因素相互复杂作用的多基因疾病,是最常见的进行性脱发类型[1]。根据国家卫健委发布的数据显示,我国有超2.5亿人正饱受脱发的困扰,且这种现象不断年轻化。AGA的进行性提示着该病症不会自行缓解,必须要进行干预。因此,近年来市场的高需求使脱发药物与食品的研究成为一大热点。 相似文献
10.
原代睾丸支持细胞分离纯化及双室培养模型的建立 总被引:1,自引:1,他引:1
[目的]通过建立双室培养模型,为探讨毒物或药物对睾丸支持细胞作用机制提供一个合适的体外研究方法。[方法]18d龄雄性SD大鼠,脱颈椎处死后,无菌条件下取睾丸组织,经胰蛋白酶和胶原酶二步消化后获得支持细胞,经接种、纯化和鉴定,获得纯度>95%支持细胞。培养液A为DMEM培养基和F12培养基按照1:1比例用去离水配制,每升培养基中含有20万单位青霉素和0.2g链霉素,用2%的碳酸氢钠调整pH值为7.2左右。培养液B为培养液A中加入维生素A、E(200ng/ml)和胰岛素(2μg/ml)。培养液C为B培养液中再加入卵泡刺激素(100ng/ml)和睾丸酮(10-8mol/L)。将制备好的支持(Sertoli)细胞混悬液按2.5×106个/ml浓度接种于24孔培养板内,培养条件为35℃(睾丸细胞的适宜温度),2%CO2恒温静止培养。测定3种不同培养液中培养的支持细胞形成的跨细胞上皮电阻值(transep-ithelialelectricalresistance,TER)。[结果]培养液加入维生素A、E和胰岛素后,支持细胞形成的TER有所升高,而培养液在加入睾丸酮和卵泡刺激素后,Sertoli细胞形成的TER则显著升高。培养第1天3种培养液中培养的Sertoli细胞形成的TER分别为33.85、31.38和34.26Ω/cm2,培养第13天分别为198.53、289.91和707.50Ω/cm2。[结论]Sertoli细胞双室培养模型可模拟体内状态的“血睾屏障”,为体外研究雄性生殖毒性机制提供一个合适模型。 相似文献
11.
目的构建过氧化氢(H2O2)诱导小鼠睾丸间质细胞(TM3)氧化应激模型, 为肥胖相关雄性生殖功能低下机制研究提供参考。方法分别以不同浓度H2O2处理TM3细胞4 h, 采用噻唑蓝法测定细胞活力, 酶联免疫吸附试验检测睾酮水平, 比色法测定细胞内活性氧(ROS)含量、总抗氧化能力(TAOC)、超氧化物歧化酶(SOD)活性和过氧化氢酶(CAT)活性。结果300、600 μmol/L H2O2组细胞存活率[(86.7±4.3)%、(46.3±2.0)%]均低于对照组[(100.0±1.7)%](P<0.05);与对照组[(250.09±26.70)pg/mL]比较, 150、300、600 μmol/L H2O2组TM3细胞睾酮水平[(188.93±7.06)、(179.23±6.66)、(131.59±11.26)pg/mL]均明显降低(P<0.05);与对照组比较, 150、300、600 μmol/L H2O2组TM3细胞SOD和CAT活性[分别为(2.42±0.17)、(2.69±0.30)、(0.44±0.41)和(56.76±12.17)、(23.45±2.17)、(24.55±18.05)U/mg protein]均明显下降(P<0.05)。结论成功构建以H2O2为诱导剂的TM3细胞体外氧化应激模型。 相似文献
12.
槲皮素对氧化应激大鼠肝细胞的保护作用 总被引:2,自引:0,他引:2
目的研究大鼠肝细胞对槲皮素的吸收以及吸收后对氧化应激损伤的作用。方法用高效液相色谱法(HPLC)测定原代培养的大鼠肝细胞对槲皮素的吸收。于培养液中加入过氧化氢诱导肝细胞氧化应激,观察槲皮素预处理后,氧化应激肝细胞乳酸脱氢酶(LDH)释放量、培养液总抗氧化能力(T-AOC)、细胞匀浆脂质过氧化终产物丙二醛(MDA)含量以及细胞凋亡率的变化。结果大鼠肝细胞对槲皮素有一定量的吸收,24小时达到高峰。过氧化氢可导致大鼠肝细胞损伤,培养液中LDH活性增加、T-AOC增强,细胞匀浆的MDA含量增加,细胞凋亡率增高。槲皮素预处理能减少氧化应激肝细胞LDH的释放,进一步增强T-AOC,降低MDA含量,并降低细胞凋亡率。结论大鼠肝细胞对槲皮素有一定量的吸收,槲皮素预处理对氧化应激肝细胞有一定的保护作用。 相似文献
13.
槲皮素对氧化应激大鼠肝细胞代谢组的影响 总被引:2,自引:0,他引:2
目的探讨槲皮素对氧化应激大鼠肝细胞代谢的影响。方法用无血清培养液原代培养大鼠肝细胞,以H2O2诱导氧化应激。培养细胞分为空白对照组(仅用培养液培养)、槲皮素组(以20μmol/L槲皮素处理肝细胞24h)、H2O2组(以8.8mmol/LH2O2作用6h诱导细胞产生氧化应激)、槲皮素+H2O2组(先用20μmol/L槲皮素预处理24h后,再用8.8mmol/LH2O2诱导氧化应激)4组。实验结束后,收集各组培养液,离心,以核磁共振谱仪检测培养液中代谢物的变化情况。结果与空白对照组比较,最显著的变化包括:(1)槲皮素和槲皮素+H2O2组二甲胺含量增加;(2)H2O2、槲皮素和槲皮素+H2O2组乙酸含量增加,丙酮酸含量减少。其次的变化包括:(1)槲皮素组乳酸减少,谷胺酰胺增加;(2)H2O2组乳酸、牛磺酸增加,组氨酸减少;(3)槲皮素+H2O2组乳酸、牛磺酸和谷胺酰胺增加,组氨酸减少。结论槲皮素可通过加速糖酵解、促进脂肪酸氧化供能发挥抗氧化应激作用,对某些含氮化合物的代谢也具有调节作用。 相似文献
14.
Agnieszka Zembron-Lacny Edyta Wawrzyniak-Gramacka Anna Ksiek Aleksandra Zagrodna Wiesaw Kope Magorzata Sowiska-Lisowska 《Nutrients》2022,14(12)
Exposure to intense physical exercise increases reactive oxygen and nitrogen species production. The process can be modulated by dipeptide bioavailability with antioxidant scavenger properties. The effects of dipeptide intake in combination with physical exercise on the oxi-antioxidant response were examined in a randomized and placebo-controlled trial. Blood samples were collected from 20 males aged 21.2 ± 1.8 years before and after 14-day intake of chicken breast extract (4 g/day), which is a good source of bioactive dipeptides. A significant increase in the NO/H2O2 ratio was observed in the 1st and 30th minute after intense incremental exercise in dipeptides compared to the placebo group. Total antioxidant and thiol redox status were significantly higher in the dipeptide group both before and after exercise; η2 ≥ 0.64 showed a large effect of dipeptides on antioxidant and glutathione status. The level of 8-isoprostanes, markers of oxidative damage, did not change under the influence of dipeptides. By contrast, reduced C-reactive protein levels were found during the post-exercise period in the dipeptide group, which indicates the anti-inflammatory properties of dipeptides. High pre-exercise dipeptide intake enhances antioxidant status and thus reduces the oxi-inflammatory response to intense exercise. Therefore, the application of dipeptides seems to have favourable potential for modulating oxidative stress and inflammation in physically active individuals following a strenuous exercise schedule. 相似文献
15.
目的明确氧化应激对视网膜色素上皮细胞(RPE)中去乙酰化酶1(SIRT1)表达的影响。方法以人RPE细胞为实验对象,不同浓度H_2O_2(0、200、300μmol/L)处理RPE细胞,观察处理后24 h细胞形态的改变情况,检测处理后24 h与72 h细胞中SIRT1的mRNA与蛋白表达情况。结果 H_2O_2作用后,随H_2O_2浓度的增加,RPE细胞的形态受损,有凋亡小体的出现;在氧化应激24 h后细胞内SIRT1的转录水平增加,而在氧化应激72 h后SIRT1的蛋白表达显著下降。结论氧化应激可导致RPE细胞形态改变,SIRT1在RPE细胞内维持着氧化与抗氧化应激系统平衡,因此将SIRT1可作为临床上年龄相关性黄斑变性病(AMD)治疗的靶点。 相似文献
16.
《Systems biology in reproductive medicine》2013,59(6):329-336
Cymbopogon citratus (C. citratus) has antioxidant, anti-inflammatory, and chemoprotective properties. This study was conducted to evaluate the protective effect of C. citratus aqueous extract against hydrogen peroxide (H2O2)–induced oxidative stress and injury in the reproductive system of male rats. The twenty-five rats used in this study were divided into five groups, comprised of five rats each. The control group received standard food and drink. The H2O2 group received standard food and water with 0.5% H2O2. The rats in the H2O2?+?C. citratus group and H2O2?+?vitamin E group received standard food, H2O2, and C. citratus [100?mg·kg?1 body weight (bw)], or vitamin E as an antioxidant reference (500?mg·kg?1 bw), respectively. The C. citratus group was given C. citratus (100?mg·kg?1 bw) in addition to the standard food and drink. The treatments were administered for 30 days. The H2O2 treatment significantly (P?<?0.05) decreased body, testicular, and epididymal weight, as well as glutathione (GSH) level, but markedly increased malonaldehyde (MDA) in serum and testes homogenates. The rats treated with H2O2 exhibited testicular degeneration and significant reduction in sperm viability, motility, count, and rate of normal sperm. The C. citratus, vitamin E, and H2O2 treatment significantly (P?<?0.05) increased the body, testicular, and epididymal weight, testosterone level, the values of the various sperm characteristics, and GSH. However, this treatment markedly reduced MDA in serum and testes homogenates, as well as testicular histopathological alterations in the H2O2-treated rats. The C. citratus aqueous extract reduced oxidative stress and protected male rats against H2O2-induced reproductive system injury. 相似文献
17.
《Systems biology in reproductive medicine》2013,59(6):312-318
A sub-acute toxicity test was performed to investigate the effects of molybdenum (Mo) on ovarian function. ICR adult female mice were exposed to Mo by free access to distilled water containing the Mo at 5, 10, 20, and 40?mg/L for 14 days. Compared to the control group, M?II oocyte morphology, ovary index, and ovulation improved within the 5?mg/L Mo group, but were negatively affected by Mo at 40?mg/L. Morphologically abnormal ovarian mitochondria were observed at?≥?20?mg/L. These alterations accompanied the changes in superoxide dismutase (SOD), glutathione peroxidise (GPx), and malondialdehyde (MDA) levels in ovaries. In conclusion, Mo affects oocyte quality possibly through regulating ovarian oxidative stress in a dose-dependent manner. It appears that Mo may improve ovarian function at a suitable concentration, which might be a candidate for the treatment of female infertility. 相似文献
18.
Visarut Buranasudja Chawanphat Muangnoi Kittipong Sanookpan Hasseri Halim Boonchoo Sritularak Pornchai Rojsitthisak 《Nutrients》2022,14(12)
Oxidative stress in dermal fibroblasts is strongly correlated with the aging process of the skin. The application of natural compounds that can increase the ability of dermal fibroblasts to counteract oxidative stress is a promising approach to promote skin health and beauty. Eriodictyol is a flavonoid that exerts several pharmacological actions through its antioxidant properties. However, its protective effects on dermal fibroblasts have not yet been investigated. In this study, we investigated whether eriodictyol protects human dermal fibroblasts (BJ fibroblasts) from the harmful effects of hydrogen peroxide (H2O2). Eriodictyol pretreatment significantly prevented necrotic cell death caused by H2O2 exposure. In addition, the level of 2′,7′-dichloro-dihydro-fluorescein oxidation was decreased, and that of glutathione was maintained, indicating that the beneficial effects of eriodictyol against H2O2 were closely associated with oxidative-stress attenuation. Eriodictyol mediates its antioxidant effects on dermal fibroblasts against H2O2 through (i) the direct neutralization of reactive oxygen species; (ii) the enhancement of the activities of H2O2-detoxifying enzymes, including catalase and glutathione peroxidase; and (iii) the induction of the expressions of catalase and glutathione peroxidase 1 via the activation of the Nrf2 signaling system. These results support the potential application of eriodictyol as an ingredient in skincare products for cosmeceutical and pharmaceutical purposes. 相似文献
19.
Catalase-deficient mouse strains was initially established by Feinstein et al. through a large scale screening of the progeny
of irradiated C3H mice in 1966. Later, Feinstein provided the mice of catalase mutant strain C3H/AnICsaCsa (wild-type), C3H/AnICsbCsb and C3H/AnlCscCsc to Okayama University Medical School in Japan. It is known that a point mutation at amino acid 11 (from glutamine to histidine)
of acatalasemic mouse catalase and a point mutation at amino acid 439 (from as paragine to serine) of hypocatalasemic mouse
catalase are responsible for the catalase deficiency of acatalasemic and hypocatalasemic mice, respectively. Recently, a liver
cell line from an acatalasemic mouse andEscherichia coli (E. coli) strains with murine normal, hypocatalasemic, or acatalasemic catalase have been established. The construction of these new
systems would be useful for studying the effects of oxidative stress at the cellular level. In this review, we give a brief
overview of recent findings of studies in utilizing the catalase-deficient mice and evaluate the possibility of these mouse
strains as a candidate animal model for oxidative stress research. 相似文献
20.
目的 探讨草苁蓉多糖对过氧化氢(H2O2)致张氏肝细胞氧化损伤的保护作用及机制。方法 以张氏肝细胞为研究对象,用H2O2诱导建立细胞氧化应激损伤模型,噻唑蓝法检测细胞存活率;分光光度法测定细胞外液中谷丙转氨酶(ALT)、谷草转氨酶(AST)、乳酸脱氢酶(LDH)及细胞中丙二醛(MDA)、还原型谷胱甘肽(GSH)和超氧化物歧化酶(SOD)含量。结果 与对照组比较,模型组肝细胞存活率[(52.5±1.2)%]下降,细胞外液中ALT、AST、LDH活力[分别为(23.5±2.9)、(29.4±2.9)、(595.4±5.6)U/L]升高,细胞中SOD活性和GSH含量[分别为(163.1±6.1)U/mg prot、(8.91±1.26)mg/g prot]下降,丙二醛含量[(12.6±2.6)nmol/mg prot]升高;与模型组比较,50 mg/L草苁蓉多糖组肝细胞存活率[(79.0±5.5)%]升高,细胞外液中ALT、AST、LDH活力[分别为(10.4±2.9)、(14.4±3.2)、(374.4±12.5)U/L]降低,细胞中SOD活性和GSH含量[分别为(323.6±17.3)U/mg prot、(15.4±0.52)mg/g prot]升高,细胞MDA含量[(6.93±0.75)nmol/mg prot]降低。结论 草苁蓉多糖对H2O2所致张氏肝细胞损伤具有一定保护作用,其机制可能与提高细胞抗氧化能力有关。 相似文献