[IkappaB alpha mRNA expression and its DNA sequence in nasopharyngeal carcinoma cell lines].
OBJECTIVE
To examine the expression of the inhibitor alpha of nuclear transcription factor kappaB (IkappaBalpha) mRNA expression and its sequence characteristics in human nasopharyngeal carcinoma cell (NPC) lines CNE1, CNE2, HNE1 and HNE2.


METHODS
Reverse transcription was performed with the total RNAs isolated from the NPC cell lines CNE1, CNE2, HNE1 and HNE2, as well as the transplanted tumor tissues with HNE1 cells. Then IkappaBalpha cDNA was amplified by PCR, and the products were used to examine IkappaB alpha mRNA expression and DNA sequencing, or the DNA sequencing after the products were cloned into plasmid vector.


RESULTS
IkappaB alpha mRNA was expressed in all the 4 nasopharyngeal carcinoma cell lines. DNA sequencing showed that polymorphisms and 5 mutations (A825G, A975G, G576A, A655G and C653A) existed in IkappaB cDNA from the transplanted tumor tissues with HNE1 cells, CNE1 and CNE2 cells.


CONCLUSIONS
The expression of IkappaBalpha mRNA not only exists, but DNA polymorphisms and some additional mutations in IkappaBalpha cDNA are also detected in the nasopharyngeal carcinoma cells.
Wang
Guang-ping
GP
Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008, China. guangpingw@yahoo.com
Chen
Fang-ping
FP
Fu
Gan
G
D001483:Base Sequence; D002277:Carcinoma; D045744:Cell Line, Tumor; D006801:Humans; D020672:I-kappa B Proteins / Q000235:genetics*; D000072000:NF-KappaB Inhibitor alpha; D000077274:Nasopharyngeal Carcinoma; D009303:Nasopharyngeal Neoplasms / Q000235:genetics*; D011110:Polymorphism, Genetic; D012333:RNA, Messenger / Q000235:genetics*
D020672:I-kappa B Proteins; C000606204:NFKBIA protein, human; D012333:RNA, Messenger; D000072000:NF-KappaB Inhibitor alpha