Open AccessNoninvasive Optical Assessment of Implanted Tissue-Engineered Construct Success In Situ
Author(s) -
William R. Lloyd,
Seung Yup Lee,
Sakib F. Elahi,
Leng-Chun Chen,
Shiuhyang Kuo,
Hyungjin Myra Kim,
Cynthia L. Marcelo,
Stephen E. Feinberg,
Mary Ann Mycek
Publication year - 2021
Publication title -
tissue engineering. part c methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 70
eISSN - 1937-3392
pISSN - 1937-3384
DOI - 10.1089/ten.tec.2021.0018
Subject(s) - in situ , construct (python library) , nanotechnology , biomedical engineering , engineering , materials science , chemistry , computer science , programming language , organic chemistry
Quantitative diffuse reflectance spectroscopy (DRS) was developed for label-free, noninvasive, and real-time assessment of implanted tissue-engineered devices manufactured from primary human oral keratinocytes (six batches in two 5-patient cohorts). Constructs were implanted in a murine model for 1 and 3 weeks. DRS evaluated construct success in situ using optical absorption (hemoglobin concentration and oxygenation, attributed to revascularization) and optical scattering (attributed to cellular density and layer thickness). Destructive pre- and postimplantation histology distinguished experimental control from stressed constructs, whereas noninvasive preimplantation measures of keratinocyte glucose consumption and residual glucose in spent culture media did not. In constructs implanted for 1 week, DRS distinguished control due to stressed and compromised from healthy constructs. In constructs implanted for 3 weeks, DRS identified constructs with higher postimplantation success. These results suggest that quantitative DRS is a promising, clinically compatible technology for rapid, noninvasive, and localized tissue assessment to characterize tissue-engineered construct success in vivo . Impact statement Despite the recent advance in tissue engineering and regenerative medicine, there is still a lack of nondestructive tools to longitudinally monitor the implanted tissue-engineered devices. In this study, we demonstrate the potential of quantitative diffuse reflectance spectroscopy as a clinically viable technique for noninvasive, label-free, and rapid characterization of graft success in situ .