[Establishment of patient-derived xenotransplantation models for non-small cell lung cancer in immune deficient mice].

Background and objective: Targeted therapies have become a valuable therapeutic option for cancer. Establishment of different animal tumor models has become necessary. This study was to establish xenotransplantation models for patient-derived non-small cell lung cancer (NSCLC) in immune deficient mice.

Methods: Immune deficient mice, BALB/C-nu, NOD/scid and SCID, 16 in each strain, were used. Sixteen tumor specimens were obtained from patients with NSCLC. Each specimen was subcutaneously transplanted into one mouse from each of the three strains. The tumor formation rate, time to tumor engraftment, tumor volume doubling time were recorded and compared among the three strains of mice. Histology of xenograft tumors was examined.

Results: The total tumor formation rate was 75% (12/16). The tumor formation rate was the highest in SCID mice (56.25%). Only four tumors were engrafted in SCID mice, and two in BALB/C-nu mice. The tumor formation rate, time to tumor engraftment, and tumor volume doubling time were not significantly different among the three strains of mice. The incidence of tumor size over 1cm in the upper flanks of the mice (56.25%) was significantly higher than that in the lower flanks (25%) (P=0.037). Haematoxylin Eosin staining revealed a high degree of histological similarity between all xenograft and the parental tumors.

Conclusions: We have established xenotransplantation models for patient-derived NSCLC with a success rate of 75% in BALB/C-nu and SCID mice. The xenograft tumors have the same histological features to those of their parental tumors.