title: [Detection of serum PICP and PINP and COL1alpha1 DNA sequence analysis in patients with arsenic poisoning in Dazhuyuan Town, Ankang area in southern Shaanxi Province].
abstract: OBJECTIVE
  To investigate type I collagen metabolism in patients with arsenic poisoning in Dazhuyuan town, Ankang area in southern Shaanxi province known for high-level exposure to arsenic (As), fluoride (F) and selenium (Se).
  
  
  METHODS
  This case-control study involved 29 patients with arsenic poisoning from Dazhuyuan, a town in Ankang area of Shaanxi province affected by coal-borne endemic arsenicosis. Thirty individuals without arsenic poisoning from Chang'an county of Xi'an city were included as the control group. The serum concentrations of As and Se were determined using a graphite furnace atomic absorption spectrophotometer, and the levels of F detected with a fluoride ion-selective electrode. Enzyme-linked immunosorbent assay (ELISA) was used for assessing serum contents of PICP and PINP, and the sequence of COL1alpha1 gene was analyzed with ABI sequence analyzer.
  
  
  RESULTS
  The contents of PICP and PINP were similar between the two groups, which had also identical COL1alpha1 DNA sequences. After controlling for all the other factors, an inverse correlation was noted between PICP and serum F contents (r=-0.4, P<0.05) and between PINP and hair F content (r=-0.5, P<0.05), but a positive correlation was found between PINP and hair Se content (r=0.5, P<0.05).
  
  
  CONCLUSIONS
  Hair F and Se levels are the major factors affecting PINP synthesis, and increased hair F level is associated with elevated PINP content, whereas hair Se level is inversely correlated to PINP content. But in the patients with arsenic poisoning from Dazhuyuan town, the PICP, PINP contents and COL1alpha1 DNA sequence show no significant alterations, suggesting that hair Se increment abolishes the effect of hair F increment in inducing the decrease in PINP content.
authors.affiliation: Department of Public Health, Xi'an Jiaotong University College of Medicine, Key Laboratory of Environment and Genes Related to Diseases of Education Ministry, Xi'an 710061, China.
authors.forename: Zhi-fang
authors.initials: ZF
authors.lastname: Wang
authors.forename: Xiong
authors.initials: X
authors.lastname: Guo
authors.forename: Guang-lu
authors.initials: GL
authors.lastname: Bai
authors.forename: Li-xin
authors.initials: LX
authors.lastname: Wang
authors.forename: Yan-xia
authors.initials: YX
authors.lastname: Lei
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D020261:Arsenic Poisoning / Q000097:blood* / Q000235:genetics*; D016022:Case-Control Studies; D002681:China; D024042:Collagen Type I / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010446:Peptide Fragments / Q000097:blood*; D011347:Procollagen / Q000097:blood*; D017422:Sequence Analysis, DNA
chemical_list: D024042:Collagen Type I; D010446:Peptide Fragments; D011347:Procollagen; C047202:procollagen Type I N-terminal peptide; C042813:procollagen type I carboxy terminal peptide