[The partial cDNA cloning of a novel gene highly expressed in hepatocellular carcinoma].
OBJECTIVE
To search the novel gene related to human hepatoma.


METHODS
Northern blot analysis was used to isolate from EST (expressed sequence tags) clones a cDNA fragment differentially expressed in hepatocellular carcinoma versus its surrounding noncancerous hepatic tissue. Human fetal liver cDNA library was screened with EST fragment probe.


RESULTS
Northern blot analysis showed that EST clone F9391 expressed at high level in all the 6 hepatocellular carcinoma samples but low level in the surrounding noncancerous hepatic tissues and 2 normal liver tissues. In further screening of human fetal liver cDNA library, we obtained a positive clone named FL6. Nucleotide sequencing indicated that FL6 contained 1464 base pairs and the matched DNA sequence was not found in the gene data bases (EMBL 96.6). Northern blot analysis of various fetus tissues with FL6 probe showed a high level expression in lung, small intestine, skin and placenta, middle level expression in liver, stomach, colon and muscle but low level expression in brain, thyroid, thymus, heart, kidney, pancreas and bladder.


CONCLUSIONS
The results suggested that FL6 gene related to cell proliferation and may play an important role in the process of oncogenesis.
Department of Pathology, Forth Military Medical University, Xi'an.
B
B
Ii
D
D
Wan
Y
Y
Liu
D001483:Base Sequence; D006528:Carcinoma, Hepatocellular / Q000235:genetics*; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics*; D004273:DNA, Neoplasm / Q000235:genetics; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics*; D008969:Molecular Sequence Data; D009857:Oncogenes / Q000235:genetics*; D017422:Sequence Analysis, DNA
D018076:DNA, Complementary; D004273:DNA, Neoplasm