Secretion of intestinal goblet cells: A novel excretion pathway of nanoparticles
- Authors
- Zhao, B., Sun, L., Zhang, W., Wang, Y., Zhu, Z., Zhu, X., Yang, L., Li, C., Zhang, Z., and Zhang, Y.
- ID
- ZDB-PUB-131203-4
- Date
- 2014
- Source
- Nanomedicine : nanotechnology, biology, and medicine 10(4): 839-49 (Journal)
- Registered Authors
- Zhao, Baoquan
- Keywords
- nanoparticle, excretion, pathway, goblet cell, aggregation
- MeSH Terms
-
- Animals
- Bile Ducts/cytology
- Bile Ducts/metabolism
- Goblet Cells/cytology
- Liver/cytology
- Liver/metabolism
- Mice
- Nanoparticles*
- Secretory Pathway*
- Yolk Sac/cytology
- Yolk Sac/metabolism
- Zebrafish
- PubMed
- 24183999 Full text @ Nanomedicine
Understanding the excretion pathway is one of the most important prerequisites for the safe use of nanoparticles in biomedicine. However, the excretion of nanoparticles in human remains largely unknown, except for some particles very small in size. Here we report a novel natural pathway for nanoparticle excretion, the intestinal goblet cell (GC) secretion pathway (IGCSP). Direct live observation of the behavior of 30-200 nm activated carbon nanoparticles (ACNP) demonstrated that ACNP microinjected into the yolk sac of zebrafish can be excreted directly through intestinal tract without involving the hepato-biliary (hap-bile) system. Histopathological examination in mice after ligation of the common bile duct (CBD) demonstrated that the intravenously-injected ACNP were excreted into the gut lumen through the secretion of intestinal GCs. ACNP in various secretion phases were revealed by histopathological examination and transmission electron microscopy (TEM). IGCSP, in combination with renal and hap-bile pathways, constitutes a complete nanoparticle excretion mechanism.