Colonic absorption of salmon calcitonin using tetradecyl maltoside (TDM) as a permeation enhancer

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Title: Colonic absorption of salmon calcitonin using tetradecyl maltoside (TDM) as a permeation enhancer
Authors: Petersen, Signe Beck
Nielsen, Lisette Gammelgaard
Rahbek, Ulrik Lytt
Guldbrandt, Mette
Brayden, David James
Permanent link: http://hdl.handle.net/10197/4367
Date: Mar-2013
Abstract: Calcitonin is used as a second line treatment of postmenopausal osteoporosis, but widespread acceptance is somewhat limited by subcutaneous and intranasal routes of delivery. This study attempted to enable intestinal sCT absorption in rats using the mild surfactant, tetradecyl maltoside (TDM) as an intestinal permeation enhancer. Human Caco-2 and HT29-MTX-E12 mucus-covered intestinal epithelial monolayers were used for permeation studies. Rat in situ intestinal instillation studies were conducted to evaluate the absorption of sCT with and without 0.1 w/v% TDM in jejunum, ileum and colon. TDM significantly enhanced sCT permeation across intestinal epithelial monolayers, most likely due to combined paracellular and transcellular actions. In situ, TDM caused an increased absolute bioavailability of sCT in rat colon from 1.0% to 4.6%, whereas no enhancement increase was observed in ileal and jejunal instillations. Histological analysis suggested mild perturbation of colonic epithelia in segments instilled with sCT and TDM. These data suggest that the membrane composition of the colon is different to the small intestine and that it is more amenable to permeation enhancement. Thus, formulations designed to release payload in the colon could be advantageous for systemic delivery of poorly permeable molecules.
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): Elsevier B.V.
Keywords: Caco-2 monolayers;HT29-MTX-E12 monolayers;Salmon calcitonin;Oral bioavailability;Epithelial drug transport;Permeation enhancers;Oral peptide delivery
DOI: 10.1016/j.ejps.2013.01.009
Language: en
Status of Item: Peer reviewed
Appears in Collections:Veterinary Medicine Research Collection

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