Imaging of Hydrogel Microsphere Structure and Foreign Body Response Based on Endogenous X-Ray Phase Contrast
Abstract
Transplantation of functional islets encapsulated in stable biomaterials has the potential to cure Type I diabetes. However, the success of these materials requires the ability to understand their stability in vivo. Imaging techniques that enable monitoring of biomaterial performance are critical to further development in the field. In this study, we demonstrate for the first time that X-ray phase contrast (XPC) imaging techniques enable 3D imaging and evaluation of islet volume, alginate hydrogel structure and local soft tissue response. Islets were encapsulated in alginate systems prepared in methods used in clinical trials and implanted in a rodent omentum pouch model as a treatment for type I diabetes. Microbeads were imaged with XPC prior to implantation and following implantation into an omentum pouch. Islets could be identified within alginate beads and the islet volume quantified. Omental adipose tissue could be distinguished from inflammatory regions resulting from implanted beads. Individual beads and the local encapsulation response were visualized and quantifiable. Measurements were in agreement with histology. The 3D structure of the microbeads could be characterized with XPC and failed beads could also be identified. These results point to the substantial potential of XPC as a tool for imaging biomaterials in small animalmore »
- Authors:
-
- Illinois Inst. of Technology, Chicago, IL (United States). Dept. of Biomedical Engineering; Edward Hines Jr. VA Hospital, Chicago, IL (United States)
- Illinois Inst. of Technology, Chicago, IL (United States). Dept. of Biomedical Engineering
- Washington Univ., St. Louis, MO (United States). Dept. of Biomedical Engineering
- Wake Forest Inst. of Regenerative Medicine, Winston-Salem, NC (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1341702
- Report Number(s):
- BNL-113449-2017-JA
Journal ID: ISSN 1937-3384
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Tissue Engineering. Part C: Methods
- Additional Journal Information:
- Journal Volume: 22; Journal Issue: 11; Journal ID: ISSN 1937-3384
- Publisher:
- Mary Ann Liebert, Inc.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 60 APPLIED LIFE SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; X-ray phase contrast; microcomputed tomography; hydrogels
Citation Formats
Appel, Alyssa A., Ibarra, Veronica, Somo, Sami I., Larson, Jeffery C., Garson, Alfred B., Guan, Huifeng, McQuilling, John Patrick, Zhong, Zhong, Anastasio, Mark A., Opara, Emmanuel C., and Brey, Eric M. Imaging of Hydrogel Microsphere Structure and Foreign Body Response Based on Endogenous X-Ray Phase Contrast. United States: N. p., 2016.
Web. doi:10.1089/ten.tec.2016.0253.
Appel, Alyssa A., Ibarra, Veronica, Somo, Sami I., Larson, Jeffery C., Garson, Alfred B., Guan, Huifeng, McQuilling, John Patrick, Zhong, Zhong, Anastasio, Mark A., Opara, Emmanuel C., & Brey, Eric M. Imaging of Hydrogel Microsphere Structure and Foreign Body Response Based on Endogenous X-Ray Phase Contrast. United States. https://doi.org/10.1089/ten.tec.2016.0253
Appel, Alyssa A., Ibarra, Veronica, Somo, Sami I., Larson, Jeffery C., Garson, Alfred B., Guan, Huifeng, McQuilling, John Patrick, Zhong, Zhong, Anastasio, Mark A., Opara, Emmanuel C., and Brey, Eric M. Mon .
"Imaging of Hydrogel Microsphere Structure and Foreign Body Response Based on Endogenous X-Ray Phase Contrast". United States. https://doi.org/10.1089/ten.tec.2016.0253. https://www.osti.gov/servlets/purl/1341702.
@article{osti_1341702,
title = {Imaging of Hydrogel Microsphere Structure and Foreign Body Response Based on Endogenous X-Ray Phase Contrast},
author = {Appel, Alyssa A. and Ibarra, Veronica and Somo, Sami I. and Larson, Jeffery C. and Garson, Alfred B. and Guan, Huifeng and McQuilling, John Patrick and Zhong, Zhong and Anastasio, Mark A. and Opara, Emmanuel C. and Brey, Eric M.},
abstractNote = {Transplantation of functional islets encapsulated in stable biomaterials has the potential to cure Type I diabetes. However, the success of these materials requires the ability to understand their stability in vivo. Imaging techniques that enable monitoring of biomaterial performance are critical to further development in the field. In this study, we demonstrate for the first time that X-ray phase contrast (XPC) imaging techniques enable 3D imaging and evaluation of islet volume, alginate hydrogel structure and local soft tissue response. Islets were encapsulated in alginate systems prepared in methods used in clinical trials and implanted in a rodent omentum pouch model as a treatment for type I diabetes. Microbeads were imaged with XPC prior to implantation and following implantation into an omentum pouch. Islets could be identified within alginate beads and the islet volume quantified. Omental adipose tissue could be distinguished from inflammatory regions resulting from implanted beads. Individual beads and the local encapsulation response were visualized and quantifiable. Measurements were in agreement with histology. The 3D structure of the microbeads could be characterized with XPC and failed beads could also be identified. These results point to the substantial potential of XPC as a tool for imaging biomaterials in small animal models.},
doi = {10.1089/ten.tec.2016.0253},
journal = {Tissue Engineering. Part C: Methods},
number = 11,
volume = 22,
place = {United States},
year = {Mon Oct 31 00:00:00 EDT 2016},
month = {Mon Oct 31 00:00:00 EDT 2016}
}
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