The BOD POD, a new air-displacement plethysmograph for measuring human body composition, utilizes the inverse relationship between pressure and volume (Boyle's law) to measure body volume directly. The quantity of air in the lungs during tidal breathing, the average thoracic gas volume (Vtg), is also measured by the BOD POD by using a standard plethysmographic technique. Alternatively, the BOD ...

Cultured hepatocytes of female carp (Cyprinus carpio) were coexposed for 4 days to 200 nM 17beta-estradiol (E2), and concentration ranges of nine known Ah receptor (AhR) agonists: 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), 3,3'4,4'5-pentachlorobiphenyl (PCB 126), 2,3'4,4'5-pentachlorobiphenyl (PCB 118), beta-naphthoflavone (BNF), benzo(a)pyrene (BaP), benzo(a)anthracene (BaA), diindolylmethane...

There is limited information on the physiological consequences associated with exposure to xenoestrogens under field conditions. The objectives of this study were to determine the presence of estrogenic chemicals in the St. Lawrence River and their effects on male reproduction in the spottail shiner (Notropis hudsonius). Hepatic vitellogenin (VTG) mRNA levels in immature shiners indicate extens...

nonylphenol (np) is a well-known compound as having the potential to mimic the natural hormone 17β-estradiol (e2) and disrupt the endocrine system in a wide range of organisms. however, the ability of different isomers of this compound is different in exerting estrogenic effects. the objectives of this study were to estimate the effects of a straight side-chain np isomer (4-n-np) on the vitello...

From May to September of 1998, we collected monthly plasma samples from male yellow-blotched map turtles Ž . captured at two sites in the Pascagoula River drainage, Mississippi. One site Vancleave has a documented history of Ž . pollution from industrial sources principally 2,3,7,8-tetrachlorodibenzo-p-dioxin, TCDD . Fish consumption advisories at the Vancleave site were lifted in 1996 and curr...

Freshwater (FW)-adapted tilapia (Oreochromis mossambicus) were treated with estradiol (E(2)) for 4 days to stimulate protein synthesis and sampled at 0, 4, and 24 h after exposure to 50% seawater (SW). E(2) increased circulating vitellogenin (VTG) levels in large amounts, indicative of unusually high rates of hepatic protein synthesis. E(2) treatment prevented the recovery of plasma osmolality ...

The paper reports a histological and immunohistochemical description of oocyte growth and ultrastructural aspects of zona radiata (ZR) formation as well as the relationship between plasma estradiol-17beta, (E2) levels and ovarian development in swordfish (Xiphias gladius L.) from the Mediterranean Sea. Ovaries were inactive during March to mid April; maturation occurred during late April to Jun...

Vitellogenin (VTG) has been widely used as a biomarker of estrogenic exposure in fish, leading to the development of standardized assays for VTG quantification. However, standardized quantitative assays for invertebrate, particularly crustacean, lipovitellin (also known as vitellin [VTN]) are lacking. In this study, a fluorescence-based VTN enzyme-linked immunosorbent assay (ELISA) was develope...

Hypercoupling of activity in speech-perception-specific brain networks has been proposed to play a role in the generation of auditory-verbal hallucinations (AVHs) in schizophrenia; however, it is unclear whether this hypercoupling extends to nonverbal auditory perception. We investigated this by comparing schizophrenia patients with and without AVHs, and healthy controls, on task-based function...

3,3'-Dinitrobisphenol A (dinitro-BPA) is formed in a mixture of bisphenol A (BPA) and nitrite under acidic conditions. It shows genotoxicity in male ICR mice on a micronucleus test, but its estrogenic activity has not been examined in vivo. We examined its estrogenic activity using goldfish (Carassius auratus) by measuring plasma levels of vitellogenin (VTG) by the ELISA method. Expression of V...