A novel in vivo model for evaluating functional restoration of a tissue-engineered salivary gland.

Authors

Swati Pradhan-Bhatt, Department of Biological Sciences, University of Delaware; Center for Translational Cancer Research, University of Delaware; Helen F. Graham Cancer Center, Christiana Care
Daniel A Harrington, Department of Biochemistry and Cell Biology, Rice University
Randall L Duncan, Department of Biological Sciences, University of Delaware; Center for Translational Cancer Research, University of Delaware; Helen F. Graham Cancer Center, Christiana Care
Mary C Farach-Carson, Department of Biological Sciences, University of Delaware; Center for Translational Cancer Research, University of Delaware; Department of Biochemistry and Cell Biology, Rice University
Xinqiao Jia, Center for Translational Cancer Research, University of Delaware; Department of Materials Sciences and Engineering, University of Delaware; Biomedical Engineering Program, University of Delaware
Robert L Witt, Department of Biological Sciences, University of Delaware; Center for Translational Cancer Research, University of Delaware; Helen F. Graham Cancer Center, Christiana Care; Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson UniversityFollow

Document Type

Article

Publication Date

2-1-2014

Comments

This article has been peer reviewed. It was published in: Laryngoscope.

Volume 124, Issue 2, February 2014, Pages 456-461.

The published version is available at DOI: https://doi.org/10.1002/lary.24297

Copyright © 2013 The American Laryngological, Rhinological and Otological Society, Inc.

Abstract

OBJECTIVES/HYPOTHESIS: To create a novel model for development of a tissue-engineered salivary gland from human salivary gland cells that retains progenitor cell markers useful for treatment of radiation-induced xerostomia.

STUDY DESIGN: A three-dimensional (3D) hyaluronic acid (HA)-based hydrogel scaffold was used to encapsulate primary human salivary gland cells and to obtain organized acini-like spheroids. Hydrogels were implanted into rat models, and cell viability and receptor expression were evaluated.

METHODS: A parotid gland surgical resection model for xenografting was developed. Salivary cells loaded in HA hydrogels formed spheroids and in vitro were implanted in the three-fourths resected parotid bed of athymic rats. Implants were removed after 1 week and analyzed for spheroid viability and phenotype retention.

RESULTS: Spheroids in 3D stained positive for HA receptors CD168/RHAMM and CD44, which is also a progenitor cell marker. The parotid gland three-fourths resection model was well-tolerated by rodent hosts, and the salivary cell/hydrogel scaffolds were adherent to the remaining parotid gland, with no obvious signs of inflammation. A majority of human cells in the extracted hydrogels demonstrated robust expression of CD44.

CONCLUSIONS: A 3D HA-based hydrogel scaffold that supported long-term culture of salivary gland cells into organized spheroids was established. An in vivo salivary gland resection model was developed that allowed for integration of the 3D HA hydrogel scaffold with the existing glandular parenchyma. The expression of CD44 among salivary cultures may partially explain their regenerative potential, and the expression of CD168/RHAMM along with CD44 may aid the development of these 3D spheroids into regenerated salivary glands.

LEVEL OF EVIDENCE: NA.

Recommended Citation

Pradhan-Bhatt, Swati; Harrington, Daniel A; Duncan, Randall L; Farach-Carson, Mary C; Jia, Xinqiao; and Witt, Robert L, "A novel in vivo model for evaluating functional restoration of a tissue-engineered salivary gland." (2014). Department of Otolaryngology - Head and Neck Surgery Faculty Papers. Paper 57.
https://jdc.jefferson.edu/otofp/57

PubMed ID

23832678

Language

English