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Evaluation and improvement of the properties of the novel cystine-knot microprotein McoEeTI for oral administration by M. Werle; K. Kafedjiiski; H. Kolmar; A. Bernkop-Schnürch is a Pharmacology, Toxicology and Pharmaceutics article available to read on EtoBox.

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Cystine-knot microproteins exhibit several properties that make them highly interesting as scaffolds for oral peptide drug delivery. It was therefore the aim of the study to evaluate the novel clinically relevant cystine-knot microprotein McoEeTI regarding its potential for oral delivery. Additionally, based on the gained results, important features of McoEeTI were improved. Enzymatic degradation was caused by chymotrypsin, trypsin and porcine small intestinal juice whereas McoEeTI was stable towards elastase, membrane bound proteases, pepsin and porcine gastric juice. Only minor McoEeTI degradation was observed during a 24 h incubation period in rat plasma. In the presence of various physiological ions about 50% of McoEeTI formed di-and/or trimers. P app value of McoEeTI was determined to be (7.4 ± 0.4) × 10 -6 cm/s. Sodium caprate and polycarbophil-cysteine (PCP-Cys) had no beneficial effect on McoEeTI permeation, whereas the utilization of a chitosan-thiobutylamidine (Chito-TBA) system improved McoEeTI permeation 3-fold. Enzymatic stability could be strongly improved by the utilization of Bowman-Birk-Inhibitor (BBI) as well as PCP-Cys. In conclusion, this study indicates that Mc

Who reads Evaluation and improvement of the properties of the novel cystine-knot microprotein McoEeTI for oral administration?

Author

M. Werle; K. Kafedjiiski; H. Kolmar; A. Bernkop-Schnürch

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-5173)

Published

2007

Language

EN

Field

Pharmacology, Toxicology and Pharmaceutics (Life Sciences)