title: [Relationships among expressions of hTERT, MDR1, MRP mRNA, and C-myc protein in non-small cell lung cancer].
abstract: OBJECTIVE
  The latest researches showed that myc protein could up-regulate the expression of human telomerase reverse transcriptase (hTERT), multidrug resistance gene 1(MDR1), multidrug resistance-related protein (MRP) in some kinds of tumors, and hTERT is correlated with efficiency of anti-tumor chemotherapy. This study was to investigate relations among expressions of hTERT, MDR1, MRP mRNA, and C-myc protein in non-small cell lung cancer (NSCLC).
  
  
  METHODS
  Expressions of hTERT, MDR1, MRP mRNA in 113 cases of NSCLC tissues were detected by in situ hybridization, expression of C-myc protein was detected by SP immunohistochemistry, their correlations with clinicopathologic features of NSCLC were statistically analyzed.
  
  
  RESULTS
  Positive rates of hTERT, MDR1, MRP mRNA, and C-myc protein in NSCLC tissues were 80.5%, 51.3%, 80.5% and 68.1%, respectively. Expressions of MDR1, MRP mRNA, and C-myc protein were significantly related to that of hTERT mRNA (P<0.05). Expression of C-myc protein did not correlate with expression of MDR1 or MRP mRNA. All 4 factors have no correlation with clinicopathologic features of NSCLC (P>0.05).
  
  
  CONCLUSIONS
  Expression of hTERT mRNA may be related to those of MDR1, MRP mRNA, and C-myc in NSCLC. Overexpression of C-myc protein may be one of the molecular regulatory mechanisms of hTERT mRNA.
authors.affiliation: Department of Pathology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430-071, P.R. China. ziweiwang986@sina.com
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Yong-Yan
authors.initials: YY
authors.lastname: Xiong
authors.forename: Lin
authors.initials: L
authors.lastname: Liu
authors.forename: Tao-Xiang
authors.initials: TX
authors.lastname: Chen
authors.forename: Xing-Feng
authors.initials: XF
authors.lastname: Yao
authors.forename: Yan-Wu
authors.initials: YW
authors.lastname: Wang
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000096:biosynthesis* / Q000235:genetics; D000230:Adenocarcinoma / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D000328:Adult; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D004268:DNA-Binding Proteins / Q000096:biosynthesis* / Q000235:genetics; D005260:Female; D019450:Genes, MDR; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000096:biosynthesis* / Q000235:genetics; D009367:Neoplasm Staging; D016271:Proto-Oncogene Proteins c-myc / Q000096:biosynthesis* / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D019098:Telomerase / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D004268:DNA-Binding Proteins; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger; D019098:Telomerase