A number of factors may be related to the inconsistent human findings, including different detection methods for biomarkers and endogenous hormones, varying overall exposure levels and concomitant chemical exposures, as well as differences in age, sex, nutritional status, comorbidities, and medication use.
The values of the effect size f 2 which reflect the influence of the exogenous on the endogenous constructs in terms of the share of the variance, showed that the constructs 'participation' and transparency' contributed to explanation of the endogenous constructs to varying degrees.
Human breast cancer cell lines with varying endogenous expression levels of ER and HER2 (MCF-7 (ER+, HER2−), ZR75.1 (ER+, HER2++), BT474 (ER+, HER2+++), SKBR3 (ER−, HER2+++)) were genetically engineered to express aromatase (A) or the backbone vector (neo) (Banerjee et al, 2009) (Supplementary Figure 1).
In this context, it is important to remember that sexual hormone receptors behave as transcription factors [ 4] and that oral contraceptives (OCs) change the endogenous milieu by varying the activity of the pituitary-ovarian [ 5] and hypothalamus-pituitary-adrenal axes [ 6].
In addition, changes in TaLCYB expression also affected the expression of several endogenous carotenogenic genes to varying degrees.
Consequently, remnants of endogenous retroviruses (ERVs) at varying states of integrity are present in vertebrate genomes and can be observed in re-sequencing data.
An important lesson obtained from experience with selenium in prostate cancer prevention is the need to understand the role of these agents in populations with different endogenous exposure, leading to varying tissue levels before study entry.
The silencing of TaLCYB led to a decrease of β-carotene content and altered the carotenoid profile and accumulation, accompanied by changes in the expression of endogenous carotenogenic genes to varying degrees.
If this hypothesis is correct, then variable imprinted Ca patterns and concomitant insulin pulsatility in healthy mice may reflect attempts by the islet to compensate for varying levels of endogenous insulin resistance.
Parallelism was assessed using three individual AD donor CSF samples with varying amounts of endogenous Aβ42.
