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Differences in bisphenol A and estrogen levels in the plasma and seminal plasma of men with different degrees of infertility.

TLDR
Overall, a disruption of estrogen metabolism was observed together with a weak but significant impact of BPA on sperm count and concentration, and this point to the importance of seminal plasma in BPA research.
Abstract
The general population is potentially exposed to many chemicals that can affect the endocrine system. These substances are called endocrine disruptors (EDs), and among them bisphenol A (BPA) is one of the most widely used and well studied. Nonetheless, there are still no data on simultaneous measurements of various EDs along with steroids directly in the seminal fluid, where deleterious effects of EDs on spermatogenesis and steroidogenesis are assumed. We determined levels of BPA and 3 estrogens using LC-MS/MS in the plasma and seminal plasma of 174 men with different degrees of infertility. These men were divided according their spermiogram values into 4 groups: (1) healthy men, and (2) slightly, (3) moderate, and (4) severely infertile men. Estradiol levels differed across the groups and body fluids. Slightly infertile men have significantly higher BPA plasma and seminal plasma levels in comparison with healthy men (p<0.05 and p<0.01, respectively). Furthermore, seminal BPA, but not plasma BPA, was negatively associated with sperm concentration and total sperm count (-0.27; p<0.001 and -0.24; p<0.01, respectively). These findings point to the importance of seminal plasma in BPA research. Overall, a disruption of estrogen metabolism was observed together with a weak but significant impact of BPA on sperm count and concentration.

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Journal ArticleDOI

The adverse health effects of bisphenol A and related toxicity mechanisms.

TL;DR: The underlying mechanisms of BPA-induced multi-organ toxicity were well summarized, involving the receptor pathways, disruption of neuroendocrine system, inhibition of enzymes, modulation of immune and inflammatory responses, as well as genotoxic and epigenetic mechanisms.
Journal ArticleDOI

Potential Mechanisms of Bisphenol A (BPA) Contributing to Human Disease.

TL;DR: This review aims to provide an extensive and comprehensive analysis of the most recent evidence about the potential mechanisms by which BPA affects human health.
Journal ArticleDOI

Effects of bisphenol A on male and couple reproductive health: a review

TL;DR: Overall, the evidence supporting an association between BPA exposure and adverse male reproductive health outcomes in humans remains limited and inconclusive.
Journal ArticleDOI

"Bisphenol a: an emerging threat to male fertility"

TL;DR: In this paper, a review of the current research data on BPA, providing an overview of the findings obtained from studies in animal and human models, as well as on its supposed mechanisms of action.
References
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Journal ArticleDOI

Xenoestrogen interaction with human sex hormone-binding globulin (hSHBG)1

TL;DR: It is suggested that hSHBG binding may transport some contaminant xenoestrogens into the plasma and modulate their bioavailability to cell tissues and disrupt the androgen-to-estrogen balance.
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Urinary bisphenol A levels in young men: association with reproductive hormones and semen quality

TL;DR: The pattern of associations between BPA and reproductive hormones could indicate an antiandrogenic or antiestrogenic effect, or both, of BPA on the hypothalamic–pituitary–gonadal hormone feedback system, possibly through a competitive inhibition at the receptor level.
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Bisphenol A affects androgen receptor function via multiple mechanisms.

TL;DR: The results showed that two receptors, estrogen receptor alpha (ERα) and androgen receptor (AR), are affected by BPA in opposite direction and BPA was unable to induce functional foci in the nuclei and is consistent with the transient transfection study that BPA is unable to activate AR.
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Evaluation of a screening system for obesogenic compounds: screening of endocrine disrupting compounds and evaluation of the PPAR dependency of the effect.

TL;DR: A standardised protocol for obesogen screening based on the 3T3-L1 cell line, a well-characterised adipogenesis model, and direct fluorescent measurement using Nile red lipid staining technique is suggested, showing the adipogenic potential of all tested parabens, several musks and phthalate compounds and BPA.
Journal ArticleDOI

Handling of Thermal Receipts as a Source of Exposure to Bisphenol A

TL;DR: It is hypothesized that handling of thermal receipts significantly increases BPA exposure, but use of gloves during handling minimizes exposure.
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Does estrogen kill sperm?

Overall, a disruption of estrogen metabolism was observed together with a weak but significant impact of BPA on sperm count and concentration.