Engineering a composite neotrachea with surgical adhesives

Reconstructive surgery often is limited by the availability of normal tissue. Tissue engineering provides promise in the development of "artificial tissues." The purpose of this study was to test the efficacy and viability of the use of a biologic surgical adhesive TISSEEL in combining engineered bronchial epithelium with engineered cartilage.

Using isolated human cells, bronchial epithelium and mature cartilage were engineered. Using a contact adhesive technique, TISSEEL was used to biologically fuse the bronchial epithelium and the cartilage. The fused composite then was supported for 5 days in tissue culture. The mechanical properties of the adhesion were tested, and the construct was studied morphologically to assess viability of the cartilage and the bronchial epithelium. The bronchial epithelium showed a normal cell size (337.2 microm2) and epithelial thickness (46.47 microm).

TISSEEL was effective in fusing the epithelium to the cartilage. The construct remained viable for 5 days in culture. There was no difference in the dimensions of the bronchial epithelium or the epithelial cells. Mechanical adhesion was achieved.

Biologically compatible fibrin glue is an effective surgical adhesive that allows the tissue types to be fused while remaining viable and morphologically accurate. Surgical adhesives may show promise in the development of composite tissue development in the field of bioengineering.