title: [PTX1 in nasopharyngeal carcinoma by RNAi technology].
abstract: OBJECTIVE
  To explore the expression and the role of PTX1 located at the amplified 12p12-p11 region in nasopharyngeal carcinoma (NPC).
  
  
  METHODS
  Semi-quantitative RT-PCR and real-time RT-PCR were applied to detect the expression level of PTX1 in 36 NPC and 8 chronic nasopharyngitis (NP) biopsies. RNAi vector targeting PTX1 was constructed and transfected into NPC cell line 6-10B. The RNAi effect was determined by detecting the expression level of PTX1 in transfected 6-10B cell line. Finally, the cell biological characteristics were compared between transfected 6-10B and parental 6-10B by analyzing the cell cycle distribution and apoptosis status using flow cytometry.
  
  
  RESULTS
  RT-PCR and real-time RT-PCR revealed that PTX1 gene was over-expressed in NPC tissues (P<0.05). PTX1 expression was suppressed in NPC cell line 6-10B by approximately 65% by RNAi, confirmed by RT-PCR. The depletion of PTX1 could effectively block the proliferation and induce the apoptosis of NPC cells.
  
  
  CONCLUSIONS
  Blocking the expression of PTX1 on mRNA level changed the characterization of NPC cell line 6-10B by RNAi, suggesting that PTX1 identified in the amplified 12p12-p11 region may be involved in the genesis and development of NPC via promoting the cell proliferation and inhibiting the cell apoptosis.
authors.affiliation: Cancer Research Institute, Central South University, Changsha, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Zhou
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.forename: Xiang-Ling
authors.initials: XL
authors.lastname: Feng
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Zhu
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.forename: Kai-Tai
authors.initials: KT
authors.lastname: Yao
authors.forename: Cai-Ping
authors.initials: CP
authors.lastname: Ren
mesh_terms: D017209:Apoptosis / Q000235:genetics / Q000502:physiology; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000473:pathology; D002453:Cell Cycle / Q000235:genetics / Q000502:physiology; D045744:Cell Line, Tumor; D005434:Flow Cytometry; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D009303:Nasopharyngeal Neoplasms / Q000235:genetics* / Q000473:pathology; D034622:RNA Interference; D034741:RNA, Small Interfering / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014162:Transfection; D033921:Vesicular Transport Proteins / Q000235:genetics* / Q000502:physiology
chemical_list: C431845:ERGIC2 protein, human; D034741:RNA, Small Interfering; D033921:Vesicular Transport Proteins