PURPOSE The objective of the study was to evaluate the synergistic transdermal permeation effect of chemical enhancers and iontophoresis technique on tolterodine tartrate (TT) transdermal gel and to evaluate its pharmacokinetic properties. MATERIALS AND METHODS Taguchi robust design was used for optimization of formulations. Skin permeation rates were evaluated using the Keshary-chein type di...

Naive mouse embryonic stem cells (mESCs) and primed epiblast stem cells (mEpiSCs) represent successive snapshots of pluripotency during embryogenesis. Using transcriptomic and epigenomic mapping we show that a small fraction of transcripts are differentially expressed between mESCs and mEpiSCs and that these genes show expected changes in chromatin at their promoters and enhancers. Unexpectedly...

There have been numerous efforts to formulate insulin into an oral dosage form. The major problems involved with the oral administration of insulin are acidic and enzymatic decomposition by the gastric medium, and poor absorption in the small intestine due to its macromolecular structure. This study attempted to test the enhancing ability of two absorption enhancers, sodium glycocholate (Na-G...

Enhancers provide critical information directing cell-type-specific transcriptional programs, regulated by binding of signal-dependent transcription factors and their associated cofactors. Here, we report that the most strongly activated estrogen (E2)-responsive enhancers are characterized by trans-recruitment and in situ assembly of a large 1-2 MDa complex of diverse DNA-binding transcription ...

Morphological innovations such as the mammalian neocortex may involve the evolution of novel regulatory sequences. However, de novo birth of regulatory elements active during morphogenesis has not been extensively studied in mammals. Here, we use H3K27ac-defined regulatory elements active during human and mouse corticogenesis to identify enhancers that were likely active in the ancient mammalia...

there have been numerous efforts to formulate insulin into an oral dosage form. the major problems involved with the oral administration of insulin are acidic and enzymatic decomposition by the gastric medium, and poor absorption in the small intestine due to its macromolecular structure. this study attempted to test the enhancing ability of two absorption enhancers, sodium glycocholate (na-gc)...

A reservoir type transdermal patch for delivery of ketorolac, a potent analgesic agent was studied. The low permeability of skin is the rate-limiting step for delivery of most of the drugs. Studies were carried out to investigate the effect of permeation enhancers on the in vitro permeation of ketorolac across rat skin. The reservoir type transdermal patch was fabricated and the core was filled...

Transdermal drug delivery offers many advantages over traditional drug delivery methods. However, the natural resistance of the skin to drug permeation represents a major challenge that transdermal drug delivery needs to overcome in a safe and reversible manner. One method for enhancing transdermal drug delivery involves the application of ultrasound (US) to skin to physically overcome the skin...