ABSTRACT
AIM,To verify whether p73;a homologue of p53,which supposed]y acts as a tumor suppressor gene in neuroblastoma,might also be a tumor suppressor in non-small cell lung cancer.METHODS:The allelic expres-sion of p73 in the six non-small cell lung cancer cell lines was studied by Sty I polymorphism analysis.The P73 gene ex.pressions in these six cell lines were examined by reverse transcription-PCR,the expressions of P73 protein in the five cell lines inducing tumor8 were also determined by immunohistochemistry.RESULTS:Homozygous allelic expression was dem.onstrated in all six cell lines and the GC/GC genotype Was the predominant type.Complete loss of the p73 expression both at mRNA and the protein level was revealed.CONCLUSION:Taken together,our data suggest that p73 might play a role as a tumor suppressor gene in human non-small cell lung cancer cell lines.
ABSTRACT
AIM: To examine the expression of CD69 on NK cells at the fetomaternal interface in CBA/J?DBA/2 mice as a model of recurrent spontaneous abortion (RSA), and to evaluate the effects of lymphocyte immunotherapy (LIT) on the level of CD69 expression and the relationship with the outcomes of murine fetuses and pups. METHODS: The outcomes of murine fetuses and pups were evaluated in breeding pairs of CBA/J?DBA/2, C57BL/6?DBA/2 and BALB/c?DBA/2 mice. Both preweaning growth curves and Kaplan-Meier survival graphs of pups were constructed throughout postnatal days 1 to 21. In addition, the level of CD69 expression on NK cells at the fetomaternal interface with and without LIT were determined by two-color flow cytometric analysis, stained with PE-CD69 and FITC-DX5. The subpopulation of CD16/CD32 + NK cells was also evaluated. RESULTS: Statistically significant differences were observed between CBA/J?DBA/2 mice and normal fertile controls in the median increase of maternal weight during pregnancy, the number of pups born per litter, the median neonatal weight on postnatal day 1, and the resorption rate of fetuses. The proportion of CD69 +DX5 + cells which represents activated NK cells was significantly higher in CBA/J?DBA/2 mice compared with normal fertile controls, while efficient LIT was able to dramatically decrease the expression of CD69 on NK cells at the fetomaternal interface and this was associated with the decrease of resorption rate accordingly. CONCLUSION: The fraction of CD69 +DX5 + cells seems to be functionally important in the mechanisms by which the embryos were rejected, whereas efficient LIT is capable of reducing the abortion rate via decreasing the expression of CD69 molecules on NK cells at the fetomaternal interface.