Synthesis and anti-osteoporosis activity of novel Teriparatide glycosylation derivatives

Osteoporosis is a metabolic bone disease that is characterized by low bone mass and micro-architectural deterioration of bones. The mechanism underlying this disease implicates an imbalance between bone resorption and bone remodeling. In 2002, the US Food and Drug Administration (FDA) approved Teriparatide for the treatment of osteoporosis, and so far, this compound is the only permitted osteoanabolic. However, as a structurally flexible linear peptide, this drug may be further optimized. In this study, we develop a series of novel N-acetyl glucosamine glycosylation derivatives of Teriparatide and examine their characteristics. Of the analyzed compounds, PTHG-9 exhibits enhanced helicity, greater protease stability, and increased osteoblast differentiation promoting ability compared with the original Teriparatide. Accordingly, PTHG-9 is suggested as a therapeutic candidate for postmenopausal osteoporosis (PMOP) and other related diseases. The successful development of an enhanced osteoporosis drug proves that the method proposed herein can be used to effectively enhance the chemical and biological properties of linear peptides with various biological functions.