Combination approacheswhether through co-administration or unimolecular polypharmacologyare particularly attractive for underexplored peptides whose strengths lie in domains not fully addressed by current standards of care
Some peptides may also inhibit the enzyme DPP-IV, which normally breaks down GLP-1, allowing the hormone to remain active longer in the body
Some argue the stomach site leads to heightened side effects, while others disagree
The lack of efficacy of inhaled GSH in patients with cystic fibrosis could be explained by the high concentrations of the GSH-degrading enzyme -glutamyltransferase present in lung fluids of those patients (116123), and then, the use of precursors of GSH synthesis like NAC and cystine could be more effective in the synthesis of GSH (124)
Importantly, decreased Y198- and Y250-nitration was visualized by re-probing the blots with 3A11C6 anti-nitroY198-HGF and 6B82C3 anti-nitroY250-HGF-specific mAbs, respectively (Figure 1b,c, first rows)