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- W2171194901 abstract "Teriparatide, a recombinant parathyroid hormone (1–34) is the first approved agent for the treatment of osteoporosis that stimulates new bone formation. Currently, the drug is administered daily by s.c. injection. Because of the obvious advantages of oral teriparatide administration, the development of such a delivery system would be of great benefit. Besides other barriers, the enzymatic barrier caused by gastro-intestinal (GI) proteolytic enzymes is believed to be responsible for negligible teriparatide oral bioavailability. It was therefore the aim of the study to evaluate the stability of teriparatide towards a variety of GI proteases under physiological conditions. Results indicate that teriparatide is entirely degraded by trypsin, chymotrypsin and pepsin within 5 min. In contrast, even after 3 h of incubation with elastase about 85% of undegraded teriparatide could still be detected. Within an incubation period of 3 h in the presence of rat small intestinal mucosa, approximately half of the teriparatide was degraded. Experiments with isolated aminopeptidase N demonstrated that this membrane bound peptidase is primarily involved in the degradation process. Results gained from and recorded in this study provide a precise characterisation of the enzymatic barrier for oral teriparatide administration and represents a prerequisite for the development of oral teriparatide delivery systems." @default.
- W2171194901 created "2016-06-24" @default.
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- W2171194901 date "2006-01-01" @default.
- W2171194901 modified "2023-10-12" @default.
- W2171194901 title "Degradation of teriparatide by gastro-intestinal proteolytic enzymes" @default.
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- W2171194901 doi "https://doi.org/10.1080/10611860600647934" @default.
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