环境内分泌干扰物对睾丸间质细胞功能的影响     

杨炜蓉  王怡  孙燕 《中国畜牧兽医》2012,39(5):157-159

近年来,环境内分泌干扰物(environmental endocrine disrupting chemicals,EDCs)对雄性动物的生殖毒性引起了广泛的关注。大量资料显示EDCs可引起雄性生殖发育障碍,如隐睾、尿道下裂、睾丸癌、精液品质不良等。作者就几种典型的EDCs对睾丸间质细胞分泌睾酮的影响机制作一综述。  相似文献   

Effects of bisphenol A,diethylhexyl phthalate and pentabrominated diphenyl ether 99 on steroid synthesis in cultured bovine luteal cells     

Ruhi Kabakci  A. Arzu Yigit 《Reproduction in domestic animals》2020,55(6):683-690

Bisphenol A (BPA), diethylhexyl phthalate (DEHP) and pentabrominated diphenyl ether 99 (PBDE 99) are environmental toxicants belonging to the endocrine disrupting compounds (EDCs). They exert adverse effects on the various physiological systems, especially the reproductive system of humans and animals. The aim of this study was to investigate the effects of BPA, DEHP and PBDE 99 on progesterone (P4) synthesis in cultured bovine luteal cells. The bovine luteal cells isolated from the mid-luteal corpora lutea were exposed to different concentrations of BPA (1, 3, 10 and 30 µM), DEHP (1, 3, 10 and 30 µM) and PBDE 99 (0.1, 0.3, 1 and 3 µM) in a serum-free culture media for 48 and 96 hr. At 48 hr, the P4 level in the luteal cells decreased after treatment with all concentrations of BPA; 3, 10 and 30 µM of DEHP; and 3 µM of PBDE 99 compared to the control (p < .05). Treatment of cells with 3–30 µM of BPA, 1–30 µM of DEHP and 1–3 µM of PBDE 99 for 96 hr resulted in reduction in P4 synthesis (p < .05). However, lower concentrations of PBDE 99 (0.1 and 0.3 µM) increased P4 levels at 48 and 96 hr. Synthesis of P4 was lower at 96 hr compared to the 48 hr in the groups treated with BPA (30 µM), DEHP (1–30 µM), PBDE 99 (0.3–3 µM) and control group. Our results showed that BPA, DEHP and PBDE 99 are able to alter luteal steroidogenesis in bovine cells and can disrupt hormonal balance in the ovary. However, it is necessary to evaluate the exact mechanism underlying these effects in future studies.  相似文献   

水产品中内分泌干扰物残留检测方法研究进展     

黄合田  杨鸿波  孙晓红  郭峰 《水产科学》2021,(2):285-293

环境内分泌干扰物(EDCs),是一类存在于环境介质中并介导生物体内分泌激素的合成、释放、代谢、结合和排泄作用,对其后代产生有害影响的外源性化学物质;因干扰内分泌系统的过程与雌激素类似,故也被称为环境激素[1-2].环境内分泌干扰物分为自然存在和人为合成,人为合成的主要来源于人类广泛的农业和工业活动,如常见的有机氯农药、...  相似文献   

典型内分泌干扰物在天然水环境中的污染水平     

谭睿婕  李宗圣  刘瑞霞  代云容  宋永会 《安徽农业科学》2015,(23)

选取7种典型内分泌干扰物双酚A、壬基酚、辛基酚、雌酮、雌二醇、雌三醇、17α-乙炔基雌二醇,检索全球范围水环境中的污染水平,按地区、季节(水期)具体分析其在水相和悬浮颗粒物中的浓度分布特征。结果表明,外源性内分泌干扰物的污染水平明显高于内源性内分泌干扰物;在全球范围内,发展中国家的污染程度普遍高于发达国家;具体流域中EDCs的浓度分布则取决于当地温度、人类活动、径流变化等多因素。  相似文献   

雌二醇、壬基酚、多氯联苯、镉和锌及其混合物对唐鱼的雌激素效应比较     

杨丽丽  张晶  方展强 《水产学报》2011,35(6):838-845

以唐鱼卵黄蛋白原(Vtg)为检测指标,利用Native-PAGE电泳、唐鱼Vtg特异性脂蛋白染色和间接酶联免疫吸附(ELISA)技术分别检测了17β-雌二醇(E₂)、壬基酚(NP)、多氯联苯(PCBs)、Cd²⁺、Zn²⁺及其混合物对唐鱼的雌激素效应。Native-PAGE结果显示,10 μg/L、50 μg/L E₂水体暴露7、14 d 均诱导雄性唐鱼体内合成了Vtg,E₂对唐鱼的雌激素效应具有时间累积效应,并随浓度升高而增强。而ELISA检测结果则显示0.1、0.5、1.0 μg/L E₂ 7、14 d和200、300 μg/L NP 14 d暴露使唐鱼合成了Vtg。结果表明,NP、Cd²⁺、Zn²⁺与不同浓度的E₂联合雌激素效应不同于单一毒物的雌激素效应,NP与E₂表现为协同促进作用。并讨论了环境雌激素的联合作用机制相关问题。  相似文献   

EDCs‐induced glucocorticoid receptor related genes expression of the river pufferfish,Takifugu obscurus     

Jin‐Hyoung Kim  Hyoung‐Joo Jeon  Jae‐Min Baek  Kyung‐Nam Han  Hans‐Uwe Dahms 《Aquaculture Research》2013,44(6):985-994

Endocrine disrupting chemicals (EDCs) are of substantial concern when contaminating waters. We studied gene expression of larvae from river pufferfish, Takifugu obscurus exposed to EDCs. We cloned the full‐ or partial‐length cDNA sequence of genes related to the cortisol pathway, such as the glucocorticoid receptor (GR), mineralocorticoid receptor (MR), heat shock protein (HSP) 70 and 90, phosphoenolpyruvate carboxykinase (PEPCK) and the FK506‐binding protein 4 (FKBP52). The tissue and time‐dependent expression of mRNA was studied by real‐time PCR in T. obscurus exposed to two representative EDCs (bisphenol‐A and 4‐tert‐octylphenol). HSP70, HSP90, MR and FKBP52 mRNA expression level was much higher than GR and PEPCK expression. GR mRNA expression level was significantly upregulated after 48 h in both EDC‐treated fish groups compared with the control. Both groups also showed down‐regulation patterns after 48 h. The initial expression of PEPCK in both groups was down‐regulated after 24 h. In the bisphenol‐A treated group, the expression of FKBP52 showed substantially high up‐regulation from 6 to 48 h after exposure, and then strikingly reduced its expression level at 72 h. Our results provide insights into the EDCs metabolizing system of T. obscurus and offers baseline information for further research related to the possible use as a bio‐indicator of this commercially important aquaculture fish species.  相似文献   

环境内分泌干扰物及其潜在威胁   总被引：2，自引：1，他引：1  

鄂勇  张晓琳  宋秋霞 《东北农业大学学报》2008,39(11)

环境内分泌干扰物(EDCs)能够干扰机体正常的内分泌系统,对人类和野生动物的健康呈现潜在的威胁。文章介绍了环境样品中某些主要类型EDCs的浓度水平,并简要地讨论了EDCs的环境暴露对人类在生殖能力、癌症的发生和甲状腺几个方面健康影响的佐证。  相似文献   

赤子爱胜蚓对氯氰菊酯暴露的生态毒性响应     

开建荣  宋玉芳  曹秀凤  杨晓霞  殷永超  陈朗 《农业环境科学学报》2013,32(2):224-231

以赤子爱胜蚓为供试生物,采用滤纸接触法及土壤培养法,通过急性毒性、生长毒性、再生繁殖毒性试验及CYP3A4酶活性毒性响应试验,进行了在不同生态响应水平上氯氰菊酯胁迫对蚯蚓的毒性效应研究,初步确定了急性毒性、生长繁殖和细胞酶活力指标的敏感性.结果表明:滤纸试验中氯氰菊酯对蚯蚓的48 h LC50和72h LC50分别为445.4、212.1 μg·cm-2,土壤试验中7d LC50和14 d LC50分别为121.6、80.2 mg· kg-1;再生繁殖试验中低剂量氯氰菊酯刺激蚯蚓体重增长、短期内诱导蚯蚓产茧率,抑制蚯蚓幼体孵育.CYP3A4酶活性毒性响应滤纸试验中氯氰菊酯对蚯蚓的CYP3A4酶活性产生明显诱导的浓度为21.5 ng·cm-2,在214.8 ng·cm-2产生明显的抑制作用;土壤试验中3d暴露后,10 mg·kg-1氯氰菊酯诱导蚯蚓体内CYP3A4活性显著升高,随着暴露时间延长,氯氰菊酯对CYP3A4活性的诱导作用始终存在,但诱导的高值浓度随暴露时间的延长而降低,CYP3A4酶活力与土壤中氯氰菊酯浓度之间呈现明显的倒U型量-效响应曲线.研究表明,各指标敏感性表现为细胞酶活力＞生长繁殖＞急性毒性,同时也证明了CYP3A4可以作为土壤拟除虫菊酯风险评价的潜在敏感生物标记物.  相似文献