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1.
双酚A与胰岛素抵抗及2型糖尿病关系的研究进展   总被引:1,自引:0,他引:1  
双酚A(BPA)是工业制造中广泛使用的一种化学物质,主要被用来制造塑料制品.日常生活中,人们通过饮食,呼吸、皮肤接触吸收BPA.BPA具有内分泌的干扰作用,被称为环境内分泌干扰物.BPA可以模拟雌激素的作用机制,影响胰岛B细胞以及雌激素敏感的组织如脂肪细胞、肝细胞、中枢神经系统,影响糖、脂代谢,引起胰岛素抵抗,影响脂肪细胞分化和脂质累积等,从而促进糖尿病的发生和发展.流行病学研究表明,BPA暴露水平过高可促进代谢性疾病,如胰岛素抵抗和2型糖尿病的发生.根据目前的研究结果,文章对BPA与胰岛素抵抗及2型糖尿病发生和发展的关系进行综述.  相似文献   

2.
研究了活性炭吸附双酚A(BPA)的规律、吸附特性和吸附处理效果。结果表明:吸附速度快,1 h达到平衡。吸附符合弗兰德利希公式,吸附常数K=191 m g/g,1n=0.239。吸附容量大,且受被吸附质浓度的影响小。当pH>9和有其他有机物存在时,因BPA发生电离和竞争吸附使吸附容量减小,吸附规律发生变化。但活性炭吸附可使BPA浓度降低到0.08 m g/L以下,是处理含BPA废水的一种有效方法。  相似文献   

3.
目的 研究双酚A(BPA)对囊胚发育和植入的影响。方法 对妊娠鼠进行完全随机化分组,分为100、300、600 mg/(kg·d)BPA组和对照组,将BPA处理组的孕鼠从妊娠的0.5~3.5 d灌服100、300和600 mg/(kg·d)BPA,着床点染色,统计胚胎的着床数和着床率,检查植入前囊胚的发育和孵化情况,激光扫描共聚焦显微镜观察孵化囊胚的卵裂球分布和含半胱氨酸的天冬氨酸蛋白水解酶3的表达。结果 300 mg/(kg·d)BPA显著降低了孕鼠的着床点数和着床率,而600 mg/(kg·d)BPA处理的孕鼠未观察到着床点,抑制了胚胎的植入。不同浓度的BPA对妊娠第4天囊胚发育率和囊胚总细胞数无影响,但300和600 mg/(kg·d)BPA显著降低了囊胚的孵化率,提高了孵化囊胚中凋亡细胞的数量。结论 高浓度的BPA损伤了附植前囊胚的发育,影响了胚胎的植入。  相似文献   

4.
目的研究围生期高剂量双酚A(BPA)暴露对仔鼠生命早期调节性T细胞(Treg)的影响,初步探讨BPA发育免疫毒性的机制。方法将确认妊娠的ICR母鼠随机分为空白对照组、溶剂对照组、BPA低剂量组(0.125 g/L)、BPA中剂量组(0.5 g/L)和BPA高剂量组(2 g/L);母鼠自妊娠第0天(GD 0)至仔鼠出生后第7天(PND 7)经饮水染毒。PND 7时处死仔鼠,无菌取胸腺,流式细胞仪(FCM)检测胸腺Treg细胞数量,RT-PCR检测Treg细胞特征性转录因子Foxp3 mRNA表达水平。结果与空白对照组及溶剂对照组比较,BPA高、中剂量组仔鼠体重在PND 1、PND 4和PND 7时明显降低(P<0.05);与空白对照组及溶剂对照组比较,BPA高、中、低3个剂量组仔鼠胸腺Treg细胞数量明显减少(P<0.01);与空白对照组及溶剂对照组相比较,3个BPA暴露组仔鼠Foxp3 mRNA表达水平明显减少,差异均有统计学意义(P<0.01)。结论围生期高剂量BPA暴露可明显影响仔鼠生命早期体内Treg细胞,从而影响机体免疫功能。  相似文献   

5.
目的研究出生前后高剂量双酚A(BPA)暴露对小鼠不同时期血清白介素-17(IL-17)和白介素-23(IL-23)水平的影响,初步探讨BPA发育免疫毒性机制。方法将确认妊娠的ICR母鼠随机分为空白对照组、溶剂对照组、BPA剂量组(高、中、低组分别为2.0、0.5和0.125 g/L BPA);母鼠自妊娠第0 d(GD0)至仔鼠断乳(出生后第21 d,PND21)经饮水暴露于BPA。分别于PND7、PND21和PND42取仔鼠外周血用ELISA检测IL-17和IL-23含量。结果在PND7和PND21时,随母鼠BPA暴露剂量的增加,仔鼠血清IL-17和IL-23含量逐渐上升,2.0 g/L BPA组与空白对照组和溶剂对照组相比,差异均有统计学意义(P值均〈0.05)。在PND42时,各BPA暴露组仔鼠血清IL-17和IL-23含量与空白对照组和溶剂对照组差异均无统计学意义(P值均〉0.05)。结论出生前后BPA暴露可能引起子代断乳前体内Th17细胞分泌的细胞因子含量升高。  相似文献   

6.
目的 研究哺乳期接触双酚A(BPA)对雄性小鼠睾丸结构及雌激素受体β(ERβ)表达的影响.方法 20只妊娠母鼠,待分娩后随机分为高、中、低剂量组,BPA染毒剂量为100、50、5 ms/(kg·d)和对照组,母鼠分娩后第2天开始每天灌服BPA,仔鼠通过乳汁暴露于BPA,一直持续到第22天断奶,研究其成年后睾丸组织形态学改变.并用免疫组织化学、RT-PCR和Western blot方法研究BPA对其成年后睾丸内ERβ表达的影响.结果 睾丸形态学分析表明BPA处理组睾丸发育受到严重影响,生精细胞排列紊乱,支持细胞和各级生精细胞生长受到不同程度的抑制;免疫组化、RT-PCR及Western blot均显示,高、中、低剂量组雄鼠成年后睾丸组织中ERβ的表达均高于对照组,差异均有统计学意义(P<0.05,P<0.01).结论 哺乳期接触BPA影响雄鼠睾丸发育,改变其成年后睾丸形态,提高睾丸组织内ERβ表达,提示BPA可能通过改变雌激素受体表达从而影响睾丸发育.  相似文献   

7.
目的研究邻苯二甲酸二乙基己酯(Di-2-ethylhexyl phthalate,DEHP)和双酚A(Bisphenol A,BPA)联合暴露对大鼠肝脏的影响。方法将Wistar大鼠随机分4组,分别灌胃1 500mg/kg DEHP、200mg/kg BPA及750mg/kg DEHP+100mg/kg BPA染毒6周。染毒终点测定血清中碱性磷酸酶(ALP)、胆固醇(CHO)、甘油三酯(TG)及镁离子(Mg2+)含量;检测肝匀浆中谷胱甘肽(GSH)、丙二醛(MDA)含量。结果与对照组比较,DEHP明显升高血清ALP、CHO及Mg2+含量,而BPA明显增加肝中MDA含量(均P〈0.05)。与对照组比较,DEHP+BPA联合染毒除明显增加肝脏脏器系数外,对大鼠体重、肝MDA、血脂及血清Mg2+和ALP含量均无明显影响。与DEHP+BPA联合染毒组比较,BPA显著升高肝脏MDA含量;DEHP增加血清Mg2+含量差异均有统计学意义(均P〈0.05)。结论 DEHP和BPA单独染毒均可产生肝损伤,其联合暴露产生交互作用。  相似文献   

8.
目的:探讨 Wnt/β-catenin 信号通路主要蛋白(β-catenin、DKK-1)在出生前后双酚A(BPA)暴露的成年子鼠雄性生殖细胞中的表达及意义。方法自受孕第0天(PGD0),ICR孕鼠饮水BPA染毒,随机将孕鼠分为溶剂对照组、BPA低剂量(10 nmol/L )组、BPA中剂量(50 nmol/L)组、BPA高剂量(300 nmol/L)组,每组6只。雄性仔鼠出生后继续饮水染毒,剂量同上,6周(PGD42)处死,取睾丸组织,计算睾丸系数;免疫组化和Western blot法检测β-cate-nin、DKK-1蛋白的表达。结果 BPA暴露组较溶剂对照组仔鼠睾丸脏器系数降低,β-catenin、DKK-1蛋白表达明显增加;免疫组化显示,β-catenin、DKK-1蛋白多位于睾丸间质细胞和精原细胞中。结论β-catenin、DKK-1可能参与了出生前后BPA暴露对子鼠雄性生殖细胞发育的影响。  相似文献   

9.
目的研究双酚A(BPA)对青春期前雌性大鼠卵巢组织中mRNA分子表达谱的影响,探讨BPA对卵巢结构和功能的潜在影响。  相似文献   

10.
目的 :探讨双酚A(bisphenol A,BPA)对人前列腺癌PC-3细胞增殖和mi R-19表达的影响。方法 :不同浓度BPA处理人前列腺癌PC-3细胞,以雌二醇(E2)作为阳性对照,6 d后采用四甲基偶氮唑盐(MTT)法和Hoechst 33258荧光染色法测定BPA对PC-3细胞增殖的影响,real-time PCR检测mi R-19a和mi R-9b表达水平的变化,Western blot检测细胞中mi R-19的靶基因PTEN及细胞增殖相关基因p-AKT、AKT、PCNA和Cyclin D1的蛋白表达变化。结果:5×10-6~5×10-5 mol/L BPA显著促进PC-3细胞增殖,增加PC-3细胞中mi R 19a和mi R 19b的表达水平,降低PTEN表达并上调p-AKT、PCNA和Cyclin D1表达水平。结论:BPA可促进前列腺癌PC-3细胞增殖,其机制可能与BPA引起mi R-19表达上调有关。  相似文献   

11.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

12.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

13.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

14.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

15.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

16.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

17.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

18.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

19.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

20.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

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