Orthotopic SCID mouse model with two newly established human lung squamous carcinoma cell lines.

The objective of this study was to present an orthotopic SCID mouse model using two newly established human cell lines derived from squamous cell carcinomas of the lung. GO-LCC1 cells (1 x 10(6)) and GO-LCC2 cells (3 x 10(6)) were implanted orthotopically into the right lungs of 10 C.B. 17 scid/scid mice. In both groups, aggressive tumor growth with partial infiltration of the thoracic wall, heart and diaphragm was observed. In only one case distant metastases in the contralateral lung were detected, while all animals developed tumors at the site of inoculation. Xenografted GO-LCC1 cells showed enhanced tumor propagation compared to GO-LCC2 cells. Our data underscore the usefulness of the SCID mouse model to study the biological behaviour of cultuved human tumor cells and furthemore demonstrate the clinical applicability of xenograft techniques using human tumor cell lines derived from pneumonectomy specimens of squamous lung carcinomas.