Injectable tissue-engineered cartilage using a fibrin sealant.
OBJECTIVE
To investigate a commercially available fibrin sealant as a vehicle for developing injectable tissue-engineered cartilage.


METHODS
Fibrin glue was mixed with autogenous chondrocytes from rabbits (n = 15). This isolate was injected along their nasal dorsa using 1 of 3 different fibrin glue concentrations. The samples were harvested at 8 weeks and compared with elastin and hyaline cartilage controls.


RESULTS
Neocartilage was created along a linear injection tract on the dorsa of the nasal bones in 5 of 15 rabbits. Higher thrombin concentrations proved to be directly correlated with successful creation of injectable cartilage. Histologically, the staining patterns of both hematoxylin-eosin and safranin O stains were identical to that of normal auricular control cartilage. The presence of elastin fibers was observed following Verhoeff staining. No foreign body reaction was observed from the host.


CONCLUSIONS
This study demonstrated a successful method for percutaneous injection of tissue-engineered cartilage as a mixture of chondrocytes suspended in fibrin glue. The thrombin concentration, along with the concentration of fibrinogen and chondrocytes, must be optimized to succeed consistently in cartilage growth.
Chang
Jinsoon
J
Department of Otolaryngology, Inje University, Seoul Paik Hospital, Seoul, South Korea.
Rasamny
Jk J
JJ
Park
Stephen S
SS
D000818:Animals; D002356:Cartilage / Q000166:cytology*; D017690:Cell Transplantation / Q000379:methods*; D019902:Chondrocytes / Q000166:cytology / Q000637:transplantation*; D015718:Fibrin Tissue Adhesive / Q000008:administration & dosage*; D007267:Injections; D011108:Polymers; D011817:Rabbits; D023822:Tissue Engineering
D015718:Fibrin Tissue Adhesive; D011108:Polymers