Occurrence and risk assessment of estrogenic compounds in the East Lake, China

Publication date: Available online 27 March 2017 Source:Environmental Toxicology and Pharmacology Author(s): Jun Wang, Yindi Zhu Forty two surface water samples were collected in May and June of 2013 in five lakelets of the East Lake, China. Four steroid hormones (17β-estradiol (βE2), estrone (E1), 17α-estradiol (αE2) and 17α-ethinylestradiol (αEE2)) were analyzed in these samples. Determination of four estrogenic compounds was performed on high performance liquid chromatography/mass spectrometry (HPLC/MS). βE2 was detected with the highest detection frequency of 62% and its concentration range was from nd to 17.58ng/L. The mean total concentration of four compounds increased with the order: Houhu lake (L5) (8.91ng/L)<Niuchao lake (L1) (19.92ng/L)<Guozheng lake (L2) (20.03ng/L)<Tangling lake (L4) (22.65ng/L)<Guandu lake (L3) (35.68ng/L). Pollution sources of four compounds were mainly from municipal wastewater and water washed out from farm land fertilized with the waste of livestock or irrigated with water from livestock farm. The proportion of sample sites at high risk that compounds had effect on fish population were 58.3% in Guozheng (L2) lake, 100% in Guandu (L3) lake, and 62.5% in Tangling (L4), Niuchao (L1) and Houhu (L5) lake, respectively. The mean βE2 equivalent concentrations was at relatively high levels in L3 with 8.6ng/L, L1 with 6.1ng/L, L4 with 4.62ng/L, L2 with 4.58ng/L and L5 with 2.62ng/L, respectivel...
Source: Environmental Toxicology and Pharmacology - Category: Environmental Health Source Type: research

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Publication date: Available online 20 January 2020Source: Molecular and Cellular EndocrinologyAuthor(s): Ronald J. van der Sluis, Menno HoekstraAbstractAdrenal-derived glucocorticoids mediate the physiological response to stress. Chronic disturbances in glucocorticoid homeostasis, i.e. in Addison's and Cushing's disease patients, predispose to the development of atherosclerotic cardiovascular disease. Here we review preclinical and clinical findings regarding the relation between changes in plasma glucocorticoid levels and the atherosclerosis extent. It appears that, although the altered glucocorticoid function can in most...
Source: Molecular and Cellular Endocrinology - Category: Endocrinology Source Type: research
Source: Gynecological Endocrinology - Category: Endocrinology Authors: Source Type: research
Source: Gynecological Endocrinology - Category: Endocrinology Authors: Source Type: research
Publication date: Available online 20 January 2020Source: Journal of Pharmaceutical and Biomedical AnalysisAuthor(s): Alexandre Goyon, Peter Yehl, Kelly ZhangABSTRACTMarketed therapies in the pharmaceutical landscape are rapidly evolving and getting more diverse. Small molecule medicines have dominated in the past while antibodies have grown dramatically in recent years. However, the failure of traditional small and large molecules in accessing certain targets has led to increased R&D efforts to develop alternative modalities. Therapeutic oligonucleotides (ONs) can accurately be directed against their ribonucleic acid (RNA...
Source: Journal of Pharmaceutical and Biomedical Analysis - Category: Drugs & Pharmacology Source Type: research
ConclusionsThese results demonstrate that a novel proton-coupled organic cation antiporter plays a predominant role in the blood to brain influx of AC, MA and HA at the BBB, and thus affect the safety of Aconitum species.Graphical abstract
Source: Journal of Ethnopharmacology - Category: Drugs & Pharmacology Source Type: research
This study investigated the cardioprotective effect of vitexin against MIRI and its possible mechanism. Isolated SD rat hearts were subjected to MIRI in a Langendorff perfusion system, and H9c2 cells were subjected to hypoxia/reoxygenation (H/R) in vitro. Ex vivo experiments showed improved left ventricular function and reduced infarct size in the vitexin group. Transmission electron microscopy showed that I/R caused outer mitochondrial membrane rupture, cristae disappearance and vacuolation, while vitexin reduced mitochondrial damage and ultimately reduced cardiomyocyte apoptosis. In vitro, vitexin protected H9c2 cells fr...
Source: Biomedicine and Pharmacotherapy - Category: Drugs & Pharmacology Source Type: research
ConclusionsOur study demonstrates the antitumor effect of IL-24 on endometrial cancer and shows that IL-24 may be a promising therapeutic gene for endometrial cancer gene therapy.Graphical abstract
Source: Biomedicine and Pharmacotherapy - Category: Drugs & Pharmacology Source Type: research
Source: Core Evidence - Category: Drugs & Pharmacology Tags: Core Evidence Source Type: research
Contributors : Diane M Ward ; Alexandra SeguinSeries Type : Expression profiling by high throughput sequencingOrganism : Mus musculusHepatocyte-specific loss of Slc25a37 (Mitoferrin1) in Mitoferrin2-/- mice did not affect animal viability or liver size suggesting that there must be alternative hepatocyte mitochondrial iron importers that function in the absence of Mitoferrins.
Source: GEO: Gene Expression Omnibus - Category: Genetics & Stem Cells Tags: Expression profiling by high throughput sequencing Mus musculus Source Type: research
This study aimed to explore the link between block copolymers’ interfacial properties and nanoscale carrier formation and found out the influence of length ratio on these characters to optimize drug delivery system. A library of diblock copolymers of PEG-PCL and triblock copolymers with additional PEI (PEG-PCL-PEI) were synthesized. Subsequently, a systematic isothermal investigation was performed to explore molecular arrangements of copolymers at air/water interface. Then, structural properties and drug encapsulation in self-assembly were investigated with DLS, SLS and TEM. We found the additional hydrogen bond in t...
Source: Acta Pharmaceutica Sinica B - Category: Cancer & Oncology Source Type: research
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