Dual-Channel Fluorescence Imaging of Hydrogel Degradation and Tissue Regeneration in the Brain.

Abstract:

:The ability of brain tissue to regenerate is limited; therefore, brain diseases (i.e., trauma, stroke, tumors) often lead to irreversible motor and cognitive impairments. Therapeutic interventions using various types of injectable biomaterials have been investigated to promote endogenous neural differentiation. Despite promising results in pre-clinical studies, the translation of regenerative medicine to the clinic has many challenges due to the lack of reliable imaging systems to achieve accurate evaluation of the treatment efficacy. Methods: In this study, we developed a dual-channel fluorescence imaging technique to simultaneously monitor tissue ingrowth and scaffold disintegration. Enzymatically crosslinked gelatin-hyaluronic acid hydrogel was labeled with 800 nm fluorophore, ZW800-3a, while the regenerated tissue was highlighted with 700 nm brain-specific contrast agent, Ox1. Results: Using the multichannel fluorescence imaging system, tissue growth and degradation of the NIR hydrogel were simultaneously imaged in the brain of mice. Images were further analyzed and reconstructed to show both visual and quantitative information of each stage of a therapeutic period. Conclusion: Dual-channel in vivo imaging systems can provide highly accurate visual and quantitative information of the brain tissue ingrowth for the evaluation of the therapeutic effect of NIR hydrogel through a simple and fast operating procedure.

journal_name

Theranostics

journal_title

Theranostics

authors

Park GK,Kim SH,Kim K,Das P,Kim BG,Kashiwagi S,Choi HS,Hwang NS

doi

10.7150/thno.35606

subject

Has Abstract

pub_date

2019-05-31 00:00:00

pages

4255-4264

issue

15

issn

1838-7640

pii

thnov09p4255

journal_volume

9

pub_type

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