But, these evaluations are often limited due to the high hydrophobicity of the plant extracts, their sensitivity to heat, light, oxygen, and their inherent poor bioavailability.
Although 5-Aza cannot be used in cancer prevention because of its mutagenic properties, the development of aerosols for dietary polyphenols (whose inherent low bioavailability may limit effectiveness) that show in vitro activity toward inhibiting cytosine DNA methyltransferases may be a promising alternative (Fang et al, 2007).
Cidofovir has recognized therapeutic potential for orthopox virus infections, although its use is hampered by its inherent low oral bioavailability.
Owing to the inherent ability of SLN to render improved bioavailability for water insoluble drugs, they have been successfully designed as carrier for delivery of various anticancer drugs, such as doxorubicin, idarubicin, paclitaxel, camptothecins, and etoposide [142].
Issues regarding changes to pharmacological specificity, desired potency, and bioavailability are compounded naturally by their inherent toxicity.
Moreover, bioavailability results show significant variability, which is inherent to the use of animal models.
Our data suggest that nigral DA bioavailability is a significant neurobiological component in inherent abilities to initiate volitional movement.
These inconsistencies have been attributed to differences in dietary phosphate bioavailability [ 34▪▪], but might also be due to inherent differences between the knockout mice per se, or in the mode and duration of adenine administration.
Thus comparisons of DA and TH measures to inherent lifetime locomotor patterns of test subjects could reveal how TH regulates DA bioavailability and inherent locomotor activity.
Aged rats have an inherent decrease in locomotor activity and provide intact neuropil to compare where DA bioavailability affects locomotor activity measures.
In summary, longitudinally-characterized locomotor activity patterns of pharmacologically-naïve rats with intact nigrostriatal and mesoaccumbens pathways showed that nigral DA bioavailability, as regulated by TH protein and phosphorylation at ser31, influenced inherent capacities for the initiation and maintenance of locomotor activity.
