title: [Exploration of differential expressed genes involved in the development and progression of hepatocellular carcinoma using oligo microarray].
abstract: OBJECTIVE
  To analyze the differential expression genes (DEGs) among hepatocellular carcinoma (HCC), para-cancerous tissue (PCT) and normal liver tissue (NLT) and explore the target genes related to the development and progression of HCC.
  
  
  METHODS
  The total RNAs of matched HCC, PCT and NLT of HCC patients were isolated using one step Trizol method. Matched RNAs were qualified using 10 g/L agarose gel electrophoresis and lab-on-chip. cRNAs were synthesized, fluorescence labeled and purified after total RNAs were purified. The RNAs of HCC and NLT, HCC and PCT were hybridized with Agilent oligo microarray (21,074 probes). The fluorescence intensity features were detected by Agilent scanner and quantified by feature extraction software. The selected candidate genes were confirmed by SYBR Green I stained real time RT-PCR.
  
  
  RESULTS
  (1) The total RNA, reverse transcription product and fluorescence labeled cRNA were all of high quality; (2) There were 420 up-regulated genes and 552 down-regulated genes among 2-fold DEGs, including DKK1 (dickkopf homolog 1) which was 5-fold up-regulated; (3) The results of real time RT-PCR, using beta-actin as an internal control, showed that the 2-Delta Ct values of DKK1 in HCC, PCT and NLT were 0.089 504, 0.007,65 and 0.000,631 respectively.
  
  
  CONCLUSIONS
  (1) The high throughput and effective Agilent oligo microarray can screen novel therapy targeted genes by analyzing the DEGs in development and progression of HCC; (2) The development and progression of HCC is a complicated process involving multigenes and multiprocedures; (3) DKK1, as a novel gene, is involved in the development and progression of HCC and may be a new therapy target.
authors.affiliation: Department of Gastroenterology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
authors.forename: Xiu-feng
authors.initials: XF
authors.lastname: Liu
authors.forename: Rui-hua
authors.initials: RH
authors.lastname: Shi
authors.forename: Heng-jun
authors.initials: HJ
authors.lastname: Gao
authors.forename: Hong
authors.initials: H
authors.lastname: Zhu
authors.forename: Shu-kui
authors.initials: SK
authors.lastname: Qin
authors.forename: Xue-hao
authors.initials: XH
authors.lastname: Wang
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000235:genetics* / Q000473:pathology; D015870:Gene Expression; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics* / Q000473:pathology; D020411:Oligonucleotide Array Sequence Analysis; D012334:RNA, Neoplasm / Q000235:genetics
chemical_list: D012334:RNA, Neoplasm