An orally administrated nucleotide-delivery vehicle targeting colonic macrophages for the treatment of inflammatory bowel disease. (April 2015)

• Record Type: Journal Article
• Authors: Huang, Zhen; Gan, Jingjing; Jia, Lixin; Guo, Guangxing; Wang, Chunming; Zang, Yuhui; Ding, Zhi; Chen, Jiangning; Zhang, Junfeng; Dong, Lei
• Is Part Of: Biomaterials. Volume 48(2015)
• Page Start: 26
• Page End: 36
• Publication Date: 2015-04
• Subjects: Inflammatory bowel disease -- Colonic macrophages -- TNF-α -- Antisense oligonucleotide -- Targeting delivery; Biomedical materials -- Periodicals; Biocompatible Materials -- Periodicals; Biomatériaux -- Périodiques; 610.28
• DOI: 10.1016/j.biomaterials.2015.01.013
• Languages: English
• ISSNs: 0142-9612

Abstract

Abstract: Tumor necrosis factor-alpha (TNF-α) plays a central role in the pathogenesis of inflammatory bowel disease (IBD). Anti-TNF-α therapies have shown protective effects against colitis, but an efficient tool for target suppression of its secretion - ideally via oral administration - remains in urgent demand. In the colon tissue, TNF-α is mainly secreted by the colonic macrophages. Here, we report an orally-administrated microspheric vehicle that can target the colonic macrophages and suppress the local expression of TNF-α for IBD treatment. This vehicle is formed by cationic konjac glucomannan (cKGM), phytagel and an antisense oligonucleotide against TNF-α. It was given to dextran sodium sulfate (DSS) colitic mice via gastric perfusion. The unique swelling properties of cKGM enabled the spontaneous release of cKGM& antisense nucleotide (ASO) nano-complex from the phytagel scaffold into the colon lumen, where the ASO was transferred into colonic macrophages via receptor-mediated phagocytosis. The treatment significantly decreased the local level of TNF-α and alleviated the symptoms of colitis in the mice. In summary, our study demonstrates a convenient, orally-administrated drug delivery system that effectively targets colonic macrophages for suppression of TNF-α expression. It may represent a promising therapeutic approach in the treatment of IBD.