OBJECTIVE The endogenous, cholestatic metabolite estradiol 17ß-D-glucuronide (E(2)17G) induces endocytic internalization of the canalicular transporters relevant to bile formation, Bsep and Mrp2. We evaluated here whether MAPKs are involved in this effect. DESIGN ERK1/2, JNK1/2, and p38 MAPK activation was assessed by the increase in their phosphorylation status. Hepatocanalicular function wa...

З огляду на роль молока та молочних продуктів у харчуванні людини, оцінка якості безпечності даних має виняткове значення. У молоці виявляють естрогенні гормони природного походження: 17β-естрадіол, 17α-естрадіол, естріол і естрон, серед них 17β-естрадіол потенційно найсильніший. Саме з надмірною кількістю 17β-естрадіолу продуктах тваринного походження пов’язують розвиток деяких онкологічних за...

In the present study, changes of values of serum 17ß-estradiol (E2), Asparate amino teransferase (AST), Alanine amino transferase (ALT) and Lactate dehydrogenase (LDH) following intraperitoneal (i.p) injection with the aromatase inhibitor (AI) letrozole were investigated in rainbow trout (Oncorhynchus mykiss). Forty- eight apparently healthy rainbow trout (mean weight of 845 g) divided...

The estrogenic effects of endocrine disrupting compounds in fish are not reversible and can reduce populations. Sensitive methods such as Q-PCR, Western blot, etc., have been used to determine changes in gene expression and this predict the effects before they become irreversible. The present study was designed to detect the expression of the estrogen receptors vitellogenin and pregnane X indic...

Background: Estrogens include estoril (E3), estradiol and estrone (E1). These chemicals are produced in human and animal bodies as well as in synthetic chemicals (drugs). Estrogens can enter water sources in different ways. When these chemicals enter the human body through water and wastewater, they have the ability to mimic or disrupt the normal estrogen activities in humans and animals. Estro...

Background: Several large epidemiological outcome studies did not demonstrate a benefit of combined estrogen-progestin replacement treatment (HRT) on cardiovascular events in elderly postmenopausal women. Whether progestin antagonism is responsible for these negative results or the natural estrogen 17ß-estradial (E2) itself is not effective in the coronary circulation is unknown. Aim: To assess...

Hormone by genotype interactions have been widely ignored by cognitive neuroscience. Yet, the dependence of cognitive performance on both baseline dopamine (DA) and current 17ß-estradiol (E2) level argues for their combined effect also in the context of reinforcement learning. Here, we assessed how the interaction between the natural rise of E2 in the late follicular phase (FP) and the 40 base-...