title: Effect of metallothionein 2A gene polymorphism on allele-specific gene expression and metal content in prostate cancer.
abstract: Metallothioneins (MTs) are highly conserved, small molecular weight, cysteine rich proteins. The major physiological functions of metallothioneins include homeostasis of essential metals Zn and Cu and protection against cytotoxicity of heavy metals. The aim of this study was to determine whether there is an association between the -5 A/G single nucleotide polymorphism (SNP; rs28366003) in core promoter region and expression of metallothionein 2A (MT2A) gene and metal concentration in prostate cancer tissues. MT2A polymorphism was determined by the polymerase chain reaction-restriction fragment length polymorphism technique (PCR-RFLP) using 412 prostate cancer tissue samples. MT2A gene expression analysis was performed by real-time RT-PCR method. A significant association between rs28366003 genotype and MT2A expression level was found. The average mRNA level was found to be lower among minor allele carriers (the risk allele) than average expression among homozygotes for the major allele. Metal levels were analyzed by flamed atomic absorption spectrometer system. Highly statistically significant associations were detected between the SNP and Cd, Zn, Cu and Pb levels. The results of Spearman's rank correlation showed that the expressions of MT2A and Cu, Pb and Ni concentrations were negatively correlated. On the basis of the results obtained in this study, we suggest that SNP polymorphism may affect the MT2A gene expression in prostate and this is associated with some metal accumulation.
authors: Department of Cytobiochemistry, University of Łódź, Pomorska 141/143, 90-236 Łódź, Poland.
authors: Anna
authors: A
authors: Krześlak
authors: Ewa
authors: E
authors: Forma
authors: Grażyna
authors: G
authors: Chwatko
authors: Paweł
authors: P
authors: Jóźwiak
authors: Agnieszka
authors: A
authors: Szymczyk
authors: Jacek
authors: J
authors: Wilkosz
authors: Waldemar
authors: W
authors: Różański
authors: Magdalena
authors: M
authors: Bryś
mesh_terms: D000368:Aged; D000483:Alleles; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008297:Male; D008668:Metallothionein / Q000096:biosynthesis / Q000235:genetics*; D019216:Metals, Heavy / Q000378:metabolism*; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011471:Prostatic Neoplasms / Q000235:genetics* / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism
chemical_list: C491053:MT2A protein, human; D019216:Metals, Heavy; D008668:Metallothionein; D015032:Zinc