[Detecting LMP1 protein expression and cloning full-length LMP1 gene in extranodal nasal type NK/T-cell lymphoma transplanted tumor models].

OBJECTIVE: To assess the stability and variability of the LMP1 gene and protein in nude-mice transplanted tumor models of extranodal nasal type NK/T-cell lymphoma. METHODS: PCR and Western Blot were performed to detect the full-length LMP1 gene and protein expression in the established extranodal nasal type NK/ T-cell lymphoma transplanted tumor models and the tissues of donor tumors. Then the sequence of full-length LMP1 gene in transplanted tumor models and donor were compared with the sequence of wild-type B95. 8 and deletion-type CAO cell strains. RESULTS: LMP1 gene and protein were detected in all the extranodal nasal type NK/T-cell lymphoma transplanted tumor models, and the full-length LMP1 nucleotide sequence homology with the donor tumor was 99. 76%. It was found in sequencing analysis that LMP1 gene sequence possessed both conservative character and specificity, similar to that of CAO cell strains. CONCLUSION: LMP1 gene and protein existed stably in the extranodal nasal type NK/T-cell lymphoma transplanted tumor models, which implied that LMP1 might relate to the maintenance and development of this lymphoma. The nude-mice transplanted tumor models provided an important experimental platform for further studies on the correlation of LMP1 and extranodal nasal type NK/T-cell lymphoma.