Biodistribution of gadolinium- and near infrared-labeled human umbilical cord mesenchymal stromal cell-derived exosomes in tumor bearing mice.

Abstract

We speculate that exosomes derived from human umbilical cord mesenchymal stromal cells (HUC-MSCs) will accumulate within tumors and have the potential for both tumor location or drug delivery. Methods: To determine proof of concept, HUC-MSC exosomes were labeled with an MRI contrast agent, gadolinium, or a near infrared dye. Exosome accumulation within ectopic osteosarcoma tumor-bearing mice was determined by 14.1 T MRI or bioimaging over 24-48 h after injection. In vitro studies examine the accumulation and physiological effect of exosomes on human and mouse osteosarcoma cell lines by MTT assay, confocal microscopy, and flow cytometry. Results: Systemic HUC-MSC exosomes accumulated continuously in tumor over a 24-48 h post-injection period. In contrast, synthetic lipid nanoparticles accumulate in tumor only for the first 3 h post-injection. Conclusion: These results suggest that HUC-MSCs exosomes accumulate within human or mouse osteosarcoma cells in vitro and in vivo over a 24 to 48 h after infusion.

• Authors: Javier Abello, Tuyen Duong Thanh Nguyen, Ramesh Marasini, Santosh Aryal, Mark Louis Weiss
• Journal: Theranostics (Theranostics) Vol. 9 Issue 8 Pg. 2325-2345 ( 2019) ISSN: 1838-7640 [Electronic] Australia
• PMID: 31149047 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Gadolinium

Topics

• Animals
• Cell Line, Tumor
• Cells, Cultured
• Exosomes (chemistry, metabolism, transplantation)
• Gadolinium (chemistry, pharmacokinetics)
• Humans
• Infrared Rays
• Magnetic Resonance Imaging (methods)
• Mesenchymal Stem Cells (metabolism)
• Mice
• Mice, Nude
• Nanoparticles (chemistry, metabolism)
• Optical Imaging (methods)
• Osteosarcoma (diagnostic imaging)
• Tissue Distribution
• Umbilical Cord (cytology)